(19)
(11)EP 3 686 969 A1

(12)EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(43)Date of publication:
29.07.2020 Bulletin 2020/31

(21)Application number: 19856441.1

(22)Date of filing:  27.09.2019
(51)International Patent Classification (IPC): 
H01M 4/139(2010.01)
(86)International application number:
PCT/CN2019/108678
(87)International publication number:
WO 2020/078201 (23.04.2020 Gazette  2020/17)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30)Priority: 16.10.2018 CN 201811204403

(71)Applicant: Shenzhen Greensun Technology Co., Ltd
Shenzhen, Guangdong 518000 (CN)

(72)Inventor:
  • The designation of the inventor has not yet been filed
     ()

(74)Representative: Dilg, Andreas 
Dilg, Haeusler, Schindelmann Patentanwaltsgesellschaft mbH Leonrodstrasse 58
80636 München
80636 München (DE)

  


(54)BATTERY ELECTRODE PIECE THERMAL COMPOUNDING APPARATUS AND METHOD FOR USING SAME TO CARRY OUT THERMO-COMPRESSION BONDING ON BATTERY ELECTRODE PIECE ASSEMBLY


(57) The present disclosure relates to the technical field of manufacturing of lithium ion batteries, and specifically provides a thermal combination equipment for electrodes, including a base, a heating device, and an electrode lamination device disposed on the base, wherein the heating device is disposed in the electrode lamination device, the electrode lamination device includes a first lamination roller, a second lamination roller, and a driving device, both the first lamination roller and the second lamination roller are connected with the driving device, the first lamination roller and the second lamination roller are disposed side by side, and a gap allowing an electrode lamination to pass therethrough is provided between the first lamination roller and the second lamination roller, a plurality of grooves are provided on an outer surface(s) of the first lamination roller and/or the second lamination roller, and the electrode lamination is heated by the heating device and then conveyed to the gap between the first lamination roller and the second lamination roller so as to be thermo-laminated by the first lamination roller and the second lamination roller, so that the electrode lamination obtained by lamination using the above equipment enables an electrolyte to be rapidly injected therein, whereby the thermal combination equipment for electrodes has a higher applicability.




Description

Cross-Reference to Related Applications



[0001] The present disclosure claims priority to Chinese Patent Application No. CN201811204403.2, filed with the Chinese Patent Office on October 16, 2018, entitled "Thermal Combination Equipment for Electrode", the contents of which are incorporated herein by reference in their entirety.

Technical Field



[0002] The present disclosure relates to the technical field of manufacturing of lithium ion batteries, and in particular to a thermal combination (or hot pressing) equipment for electrodes (or battery electrodes) and a method for thermocompression of an electrode lamination (or a battery electrode assembly) using the thermal combination equipment.

Background Art



[0003] At present, a lithium ion battery is usually manufactured by using a lamination process, and is specifically manufactured using thermal combination lamination. Specifically, before the lamination, it is necessary to heat a positive electrode material strip, a negative electrode material strip, and two separator strips using a heat generation device, and then the above fours strips are laminated by an appropriate pressure so that they are adhered to one another to form an integrated piece.

[0004] The inventors have found through study that a battery cell obtained in the above manner has a tight structure with almost zero gap between a separator and electrodes, which leads to a long electrolyte permeation time in the subsequent electrolyte injection process, which can hardly meet the rapidly increasing demand for power batteries in the new energy market at present. Therefore, how to achieve rapid electrolyte injection in a laminate obtained by thermal combination of the positive electrode material strip, the negative electrode material strip, and the separator strip is a technical problem to be solved urgently.

Summary



[0005] The present disclosure provides a thermal combination equipment for electrodes and a method for thermocompression of an electrode lamination using the equipment to effectively alleviate the above technical problems.

[0006] Embodiments of the present disclosure may be implemented, for example, in the following manner:

An embodiment of the present disclosure provides a thermal combination equipment for electrodes , which is applicable to thermocompression of an electrode lamination, the thermal combination equipment for electrodes comprising a base, a heating device, and an electrode lamination device disposed on the base, wherein the heating device is disposed in the electrode lamination device;

the electrode lamination device comprises a first lamination roller, a second lamination roller, and a driving device, wherein both the first lamination roller and the second lamination roller are connected with the driving device, the first lamination roller and the second lamination roller are disposed side by side (in parallel), and a gap allowing an electrode lamination to pass therethrough is provided between the first lamination roller and the second lamination roller, a plurality of grooves are provided on an outer surface(s) of the first lamination roller and/or the second lamination roller, the heating device is configured to heat the electrode lamination, and the heated electrode lamination is conveyed to the gap between the first lamination roller and the second lamination roller so as to be thermo-laminated by the first lamination roller and the second lamination roller.



[0007] Optionally, in the thermal combination equipment for electrodes described above, the first lamination roller has similar shape and size as those of the second lamination roller, and the first lamination roller is provided thereon with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.

[0008] Optionally, in the thermal combination equipment for electrodes described above, the second lamination roller is provided with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.

[0009] Optionally, in the thermal combination equipment for electrodes described above, each groove is an annular groove circumferentially provided at the periphery of the respective lamination roller.

[0010] Optionally, in the thermal combination equipment for electrodes described above, the driving device comprises a servo motor, a first driving component, and a second driving component, wherein the first driving component is connected with the first lamination roller, the second driving component is connected with the second lamination roller, and the servo motor is connected with both of the first driving component and the second driving component so as to simultaneously drive the first driving component and the second driving component such that the first lamination roller and the second lamination roller are simultaneous driven to rotate, and the first lamination roller and the second lamination roller are rotated at the same peripheral velocity in opposite directions.

[0011] Optionally, in the thermal combination equipment for electrodes described above, the heating device is disposed at substantially the same level as the gap between the first lamination roller and the second lamination roller.

[0012] Optionally, in the thermal combination equipment for electrodes described above, the heating device comprises a first heating component and a second heating component disposed opposite to each other, wherein the first heating component is disposed on the first lamination roller, and the second heating component is disposed on the second lamination roller, and a gap between the first heating component and the second heating component is provided at substantially the same level as the gap between the first lamination roller and the second lamination roller, and the distance between the first heating component and the second heating component matches the thickness of the electrode lamination, so that the first heating component and the second heating component can heat the electrode lamination from both sides of the electrode lamination, respectively.

[0013] Optionally, in the thermal combination equipment for electrodes described above, the first heating component and the second heating component have similar shape and size, each of the first heating component and the second heating component comprises a heating plate, a heat insulation plate, and a heating wire, wherein the heating wire is embedded in the heating plate, the heat insulation plate is disposed on a side of the heating plate away from the heating wire, and the heating plate is disposed such that the heat insulation plate is between the first lamination roller and the heating plate, and a side of the heating plate away from the heat insulation plate, that is, a side of the heating plate on which the heating wire is disposed, faces the to-be-heated electrode lamination so as to heat the electrode lamination.

[0014] Optionally, in the thermal combination equipment for electrodes described above, the first heating component and/or the second heating component each have a circular or rectangular surface for heating.

[0015] Optionally, in the thermal combination equipment for electrodes described above, the first heating component and/or the second heating component each have one heating wire, wherein the heating wire is embedded in the heating plate in a serpentine form.

[0016] Optionally, in the thermal combination equipment for electrodes described above, the first heating component and/or the second heating component each have a plurality of heating wires, and the heating wires are embedded in the heating plate in a parallel and side-by-side manner.

[0017] Optionally, in the thermal combination equipment for electrodes described above, the thermal combination equipment for electrode further comprises a support seat and a pressing cylinder, wherein the support seat is disposed on the base, and the pressing cylinder is disposed on the support seat and is connected with the first lamination roller such that the first lamination roller applies a downward pressure to the electrode lamination.

[0018] Optionally, in the thermal combination equipment for electrodes described above, the thermal combination equipment for electrodes further comprises an auxiliary cylinder, a sliding plate, and a connection plate, wherein the auxiliary cylinder is disposed on the support seat, the first lamination roller is disposed on the connection plate, and the connection plate is connected with the support seat via the sliding plate, so that the auxiliary cylinder drives the first lamination roller disposed on the connection plate to slide up and down along the sliding plate to adjust the distance between the first lamination roller and the second lamination roller.

[0019] Optionally, in the thermal combination equipment for electrodes described above, the thermal combination equipment for electrodes further comprises a transition roller, wherein the transition roller is disposed on the base and is on a side of the electrode lamination device away from the heating device and is configured to convey the laminated electrode lamination.

[0020] The present disclosure further provides a thermal combination equipment for electrodes, which is applicable to thermocompression of an electrode lamination, the thermal combination equipment for electrodes comprising: a base, a heating device, a transition roller, and an electrode lamination device disposed on the base, wherein the heating device is disposed in the electrode lamination device;
the electrode lamination device comprises a first lamination roller, a second lamination roller, and a driving device, both the first lamination roller and the second lamination roller are connected with the driving device, the first lamination roller and the second lamination roller are disposed side by side, and a gap allowing an electrode lamination to pass therethrough is provided between the first lamination roller and the second lamination roller, the first lamination roller and the second lamination roller have similar shape and size and an outer surface of each of the first lamination roller and the second lamination roller is provided with a plurality of grooves which are sequentially spaced apart from one another, the heating device is configured to heat the electrode lamination, the heated electrode lamination is conveyed to the gap between the first lamination roller and the second lamination roller so as to be thermo-laminated by the first lamination roller and the second lamination roller, and the transition roller is disposed on the base and is on a side of the electrode lamination device away from the heating device and is configured to convey the laminated electrode lamination.

[0021] The present disclosure further provides a method for thermocompression of an electrode lamination using the thermal combination equipment for electrodes described above, the method comprising: heating an electrode lamination using the heating device, and conveying the heated electrode lamination to the gap between the first lamination roller and the second lamination roller so that the heated electrode lamination is thermo-laminated by the first lamination roller and the second lamination roller.

[0022] Optionally, in the method for thermocompression of an electrode lamination described above, the first lamination roller has similar shape and size as those of the second lamination roller, and the first lamination roller is provided with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.

[0023] Optionally, in the method for thermocompression of an electrode lamination described above, the second lamination roller is provided with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.

[0024] Optionally, in the method for thermocompression of an electrode lamination described above, each groove is an annular groove circumferentially provided at the periphery of the respective lamination roller.

[0025] Optionally, in the method for thermocompression of an electrode lamination described above, the heating device comprises a first heating component and a second heating component disposed opposite to each other, wherein the first heating component is disposed on the first lamination roller, and the second heating component is disposed on the second lamination roller, and a gap between the first heating component and the second heating component is provided at substantially the same level as the gap between the first lamination roller and the second lamination roller, and the distance between the first heating component and the second heating component matches the thickness of the electrode lamination, so that the first heating component and the second heating component can heat the electrode lamination from both sides of the electrode lamination, respectively.

[0026] The thermal combination equipment for electrodes according to the embodiment of the present disclosure is provided with a base, a heating device and an electrode lamination device, wherein the electrode lamination device is provided with a first lamination roller, a second lamination roller and a driving device, and a plurality of grooves are provided on the outer surface(s) of the first lamination roller and/or the second lamination roller, so that a laminated electrode lamination obtained by thermocompression of the electrode lamination using the thermal combination equipment for electrodes described above has uncompacted transition zones, by which rapid injection of an electrolyte is achieved, thereby the applicability of the thermal combination equipment for electrodes is improved.

[0027] In order to enable more apparent and easier understanding of the above objects, features, and advantages of the present disclosure, preferred embodiments will be described below in detail by way of example with reference to the accompanying drawings.

Brief Description of Drawings



[0028] In order to more clearly illustrate technical solutions of embodiments of the present disclosure, drawings required for use in the embodiments will be described briefly below. It is to be understood that the drawings below are merely illustrative of some embodiments of the present disclosure, and therefore should not be considered as a limitation on the scope thereof. It will be understood by those of ordinary skill in the art that other relevant drawings can also be obtained from these drawings without any inventive effort.

FIG. 1 is a schematic structural diagram of a thermal combination equipment for electrodes according to an embodiment of the present disclosure.

FIG. 2 is another schematic structural diagram of a thermal combination equipment for electrodes according to an embodiment of the present disclosure.

FIG. 3 is a schematic structural diagram of a first lamination roller according to an embodiment of the present disclosure.

FIG. 4 is a schematic structural diagram of a first heating component according to an embodiment of the present disclosure.



[0029] Reference Numerals: 100-thermal combination equipment for electrodes; 110-base; 120-heating device; 122-first heating component; 122a-heating plate; 122b-heat insulation plate; 122c-heating wire; 124-second heating component; 130-electrode lamination device; 132-first lamination roller; 133-groove; 134-second lamination roller; 140-support seat; 150-pressing cylinder; 160-auxiliary cylinder; 170-sliding plate; 180-connection plate; 190-transition roller.

Detailed Description of Embodiments



[0030] The technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is apparent that the embodiments to be described are some, rather than all of the embodiments of the present disclosure. Generally, the components of the embodiments of the present disclosure, as described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present disclosure, as represented in the figures, is not intended to limit the scope of the present disclosure as claimed, but is merely representative of selected embodiments of the present disclosure. All the other embodiments obtained by those skilled in the art in light of the embodiments of the present disclosure without inventive efforts shall fall within the scope of the present disclosure as claimed.

[0031] It should be noted that similar reference numerals and letters refer to similar items in the following figures, and thus once an item is defined in one figure, it may not be further defined or explained in the following figures. Moreover, in the description of the present disclosure, terms such as "first" and "second" are used for distinguishing the description only, and should not be understood as an indication or implication of relative importance.

[0032] Referring to FIG. 1 and FIG. 2, an embodiment of the present disclosure provides a thermal combination equipment 100 for electrodes, which is applicable to the thermocompression of an electrode lamination. The thermal combination equipment 100 for electrodes comprises a base 110, a heating device 120, and an electrode lamination device 130 disposed on the base 110, wherein the heating device 120 is disposed in the electrode lamination device 130.

[0033] Optionally, in the embodiment of the present disclosure, the electrode lamination (rolling) device 130 may comprise a first lamination roller 132, a second lamination roller 134, and a driving device, wherein the first lamination roller 132 and the second lamination roller 134 are connected with the driving device, respectively, the first lamination roller 132 and the second lamination roller 134 are disposed side by side (in parallel), and there is a gap allowing an electrode lamination to pass therethrough between the first lamination roller 132 and the second lamination roller 134. Optionally, the heating device 120 is disposed at substantially the same level as the gap between the first lamination roller 132 and the second lamination roller 134. Referring to FIG. 3, optionally, an outer surface of the first lamination roller 132 is provided with a plurality of grooves 133, and similarly, an outer surface of the second lamination roller 134 may also optionally be provided with a plurality of grooves 133. The heating device 120 is configured to heat the electrode lamination, and the heated electrode lamination is conveyed to the gap between the first lamination roller 132 and the second lamination roller 134 so as to be thermo-compressed by the first lamination roller 132 and the second lamination roller 134.

[0034] It should be noted that, in the embodiment of the present disclosure, the electrode lamination may comprise a positive electrode, a first separator (film), a negative electrode, and a second separator (film) which are sequentially disposed in a stacked manner, or the electrode lamination may only comprise a first separator, a negative electrode, and a second separator which are sequentially stacked, and optionally, the electrode lamination may also comprise a plurality of electrodes, wherein each of the electrodes is provided with separators on both sides thereof.

[0035] When the thermal combination equipment 100 for electrodes described above is used for performing lamination (compression bonding) on the electrode lamination described above, the electrode lamination is heated using the heating device 120, and the heated electrode lamination is conveyed to the gap between the first lamination roller 132 and the second lamination roller 134 so as to be thermo-compressed by the first lamination roller 132 and the second lamination roller 134. Due to the grooves 133 provided on the first lamination roller 132 and/or the second lamination roller 134, during the lamination, portions of the electrode lamination which are corresponding to the grooves 133 are not compacted while a portion of the electrode lamination which is corresponding to a portion between each two adjacent grooves 133 is compacted, so that the separator in the obtained laminated electrode lamination has transition zones. Accordingly, when the laminated electrode lamination described above is used for making a battery, an electrolyte can rapidly permeate the laminated electrode lamination through the transition zones, whereby rapid electrolyte injection is achieved, that is to say, the electrolyte permeation time in the subsequent electrolyte injection process is reduced so as to accelerate the entire production process.

[0036] The base 110 may have any shape, and may, for example, have a regular shape such as a rectangular parallelepiped shape, a truncated conical shape, or a cylindrical shape, or the base may have any irregular shape, which is not specifically limited herein.

[0037] Optionally, the heating device 120 may heat the electrode lamination at a temperature including, but not limited to, 80 °C, 90 °C, 110 °C, and 130 °C; and in addition, the heating temperature may also be adjusted according to actual requirements.

[0038] Optionally, the number of the heating devices 120 may be one or more, and the heating device 120 may have any shape or size as long as the heating of the electrode lamination can be achieved.

[0039] Optionally, in order to uniformly heat the electrode lamination using the heating device 120, in the embodiment of the present disclosure, referring to FIG. 2, the heating device 120 may comprise a first heating component 122 and a second heating component 124 disposed opposite to each other, wherein the first heating component 122 is disposed on the first lamination roller 132, and the second heating component 124 is disposed on the second lamination roller 134 such that a gap between the first heating component 122 and the second heating component 124 is at substantially the same level as the gap between the first lamination roller 132 and the second lamination roller 134. Moreover, the distance between the first heating component 122 and the second heating component 124 matches the thickness of the electrode lamination, so that the first heating component 122 and the second heating component 124 can heat the electrode lamination from both sides of the electrode lamination, respectively.

[0040] Optionally, the first heating component 122 and the second heating component 124 may have the same or different shapes and sizes.

[0041] In order to further improve the effect of heating the electrode lamination by the heating device 120, in the embodiment of the present disclosure, the first heating component 122 and the second heating component 124 are identical in both shape and size. For the convenience of description, only the specific structure of the first heating component 122 will be described in detail in the present disclosure. Referring to FIG. 4, the first heating component 122 comprises a heating plate 122a, a heat insulation plate 122b, and heating wire 122c, wherein the heating wire 122c is embedded in the heating plate 122a, the heat insulation plate 122b is disposed on a side of the heating plate 122b away from the heating wire 122c, and the heating plate 122a is disposed such that the heat insulation plate 122b is between the first lamination roller 132 and the heating plate, such that a side of the heating plate 122a remote from the heat insulation plate 122b, that is, the side surface of the heating plate 122a on which the heating wire 122c is disposed, faces the to-be-heated electrode lamination so as to heat the electrode lamination.

[0042] Optionally, the surface of the heating plate 122a which is used for heating may have a regular shape such as a circle or a rectangle, or may have any irregular shape, and optionally, one or more heating wires 122c may be provided.

[0043] In the embodiment of the present disclosure, a case where the heating plate 122a has a rectangular surface for heating is exemplarily shown. When one heating wire 122c is provided, the heating wire 122c may optionally be embedded in the heating plate 122a in a serpentine form. When a plurality of heating wires 122c are provided, the plurality of heating wires 122c may optionally be embedded in the heating plate 122a in parallel side by side.

[0044] With the above arrangement, the electrode lamination is heated simultaneously by using the first heating component 122 and the second heating component 124, thus the electrodes and the separators in the electrode lamination can be uniformly heated to improve the uniformity of adhesion of the electrodes. In addition, the heat insulation plate 122b is provided such that it is possible to effectively avoid scalding of a user during the user's operation, and to avoid a situation where heat generated by the heating plate 122a adversely affects other components.

[0045] Optionally, the first lamination roller 132 and the second lamination roller 134 may have the same or different shapes and sizes. Optionally, in the case where both the first lamination roller 132 and the second lamination roller 134 are provided thereon with grooves 133, the first lamination roller 132 and the second lamination roller 134 may have the same number or different numbers of grooves 133; and the grooves 133 on the first lamination roller 132 and the grooves 133 on the second lamination roller 134 may have the same or different shapes and sizes. Optionally, the plurality of grooves 133 on each of the first lamination roller 132 and the second lamination roller 134 may also have the same or different shapes and sizes.

[0046] In order to achieve a better effect of adhesion between the electrodes and the separators in the obtained laminated electrode lamination, in the embodiment of the present disclosure, the first lamination roller 132 has similar shape and size as those of the second lamination roller 134, and the plurality of grooves 133 provided on the first lamination roller 132 have similar shape and size and are sequentially disposed spaced apart from one another.

[0047] Optionally, each groove 133 may be a strip groove or an annular groove, which is not specifically limited herein. In the embodiment of the present disclosure, a case where the grooves 133 are annular grooves is exemplarily shown, wherein the annular grooves are provided on the first lamination roller 132 and/or the second lamination roller 134 at positions by which it can be ensured that both ends of each of all the electrode laminations which have different widths in a lamination (pressing) range are thermally combined while a portion near the intermediate position between the both ends is spaced apart, so as to facilitate to picking up of the laminated electrode laminations in a subsequent stage.

[0048] It can be understood that the number, position(s), groove width, groove depth, and groove shape of the above annular grooves provided are set according to different requirements and occasions, and are not specifically limited herein.

[0049] In order to enable the driving device to synchronously control the first lamination roller 132 and the second lamination roller 134, in the embodiment of the present disclosure, optionally, the driving device comprises a servo motor, a first driving component, and a second driving component, wherein the first driving component is connected with the first lamination roller 132, the second driving component is connected with the second lamination roller 134, and the servo motor is connected with both of the first driving component and the second driving component so as to simultaneously drive the first driving component and the second driving component, in this way, the first lamination roller 132 and the second lamination roller 134 are simultaneous driven to rotate, wherein the first lamination roller 132 and the second lamination roller 134 are rotated at the same peripheral velocity in opposite directions (clock-wises).

[0050] With the above arrangement, the first lamination roller 132 and the second lamination roller 134 are simultaneously driven by the servo motor, thereby obtaining a better lamination effect and at the same time avoiding the problems of cost increase and complicated structure caused by use of different driving devices.

[0051] It should be noted that, optionally, the first driving component and the second driving component described above may be rotary driving shafts or driving bearings.

[0052] In order to allow the first lamination roller 132 and the second lamination roller 134 to laminate the electrode lamination with uniform pressure so as to endow the laminated electrode lamination with a better lamination effect, in the embodiment of the present disclosure, optionally, the thermal combination equipment 100 for electrodes may further comprise a support seat 140 and a pressing cylinder 150, referring to FIG. 1. The support seat 140 is disposed on the base 110, and the pressing cylinder 150 is disposed on the support seat 140 and connected with the first lamination roller 132 such that the first lamination roller applies a downward pressure to the electrode lamination.

[0053] In order to enable thermocompression of different electrode laminations so as to endow the thermal combination equipment 100 for electrodes with a higher applicability, in the embodiment of the present disclosure, optionally, referring to FIG. 2, the thermal combination equipment 100 for electrodes may further comprise an auxiliary cylinder 160, a sliding plate 170, and a connection plate 180. The auxiliary cylinder 160 is disposed on the support seat 140, the first lamination roller 132 is disposed on the connection plate 180, and the connection plate 180 is connected with the support seat 140 via the sliding plate 170, so that the auxiliary cylinder 160 drives the first lamination roller 132 disposed on the connection plate 180 to slide up and down along the sliding plate 170 to adjust the distance between the first lamination roller 132 and the second lamination roller 134.

[0054] In order to avoid the problem of damage of the laminated electrode lamination during its conveyance so as to further improve the applicability of the thermal combination equipment 100 for electrodes, in the embodiment of the present disclosure, optionally, referring to FIG. 2, the thermal combination equipment 100 for electrodes may further comprise a transition roller 190. The transition roller 190 is disposed on the base 110 and is on a side of the electrode lamination device 130 away from the heating device 120 and is configured to convey the laminated electrode lamination.

[0055] In summary, the thermal combination equipment 100 for electrodes according to the present disclosure is provided with a base 110, a heating device 120 and an electrode lamination device 130, wherein the electrode lamination device 130 is provided with a first lamination roller 132, a second lamination roller 134 and a driving device, and a plurality of grooves 133 are provided on the outer surface of the first lamination roller 132, so that an electrolyte can be rapidly injected into a laminated electrode lamination obtained by thermocompression of the electrode lamination using the above thermal combination equipment 100 for electrodes, whereby the electrolyte permeation time in the subsequent electrolyte injection process is reduced so as to accelerate the entire production process. The pressing cylinder 150 is provided such that the laminated electrode lamination is endowed with a better uniformity and a better lamination effect. The auxiliary cylinder 160, the sliding plate 170, the connection plate 180, and the transition roller 190 are provided to adjust the distance between the first lamination roller 132 and the second lamination roller 134, whereby it is possible to perform thermocompression on different electrode laminations, so that the thermal combination equipment 100 for electrodes has a higher applicability.

[0056] The above description is merely illustrative of specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any variations or alternatives that can be readily envisaged by those skilled in the art within the technical scope disclosed in the present disclosure are intended to be encompassed in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined by the scope of protection of the claims.

Industrial Applicability:



[0057] In summary, the present disclosure provides a thermal combination equipment for electrodes. An electrode lamination obtained using the equipment enables an electrolyte to be rapidly injected therein and is endowed with a better uniformity and a better lamination effect, and the equipment is applicable to lamination of different electrodes, has high applicability, and can effectively meet the rapidly increasing demand for batteries in the new energy market. The equipment has a simple structure, which contributes to a significant reduction of the production cost.


Claims

1. A thermal combination equipment for electrodes, which is applicable to thermocompression of an electrode lamination, characterized in that the thermal combination equipment for electrodes comprises a base, a heating device, and an electrode lamination device disposed on the base, wherein the heating device is disposed in the electrode lamination device;
the electrode lamination device comprises a first lamination roller, a second lamination roller, and a driving device, both the first lamination roller and the second lamination roller are connected with the driving device, the first lamination roller and the second lamination roller are disposed side by side, and a gap allowing an electrode lamination to pass therethrough is provided between the first lamination roller and the second lamination roller, a plurality of grooves are provided on an outer surface(s) of the first lamination roller and/or the second lamination roller, the heating device is configured to heat the electrode lamination, and the heated electrode lamination is conveyed to the gap between the first lamination roller and the second lamination roller so as to be thermo-laminated by the first lamination roller and the second lamination roller.
 
2. The thermal combination equipment for electrodes according to claim 1, wherein the first lamination roller has similar shape and size as those of the second lamination roller, and the first lamination roller is provided thereon with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.
 
3. The thermal combination equipment for electrodes according to claim 1 or 2, wherein the second lamination roller is provided thereon with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.
 
4. The thermal combination equipment for electrodes according to any one of claims 1 to 3, wherein each groove is an annular groove circumferentially provided at the periphery of the respective lamination roller.
 
5. The thermal combination equipment for electrodes according to any one of claims 1 to 4, wherein the driving device comprises a servo motor, a first driving component, and a second driving component, the first driving component is connected with the first lamination roller, the second driving component is connected with the second lamination roller, and the servo motor is connected with both of the first driving component and the second driving component so as to simultaneously drive the first driving component and the second driving component such that the first lamination roller and the second lamination roller are simultaneous driven to rotate, and the first lamination roller and the second lamination roller are rotated at same peripheral velocity and in opposite directions.
 
6. The thermal combination equipment for electrodes according to any one of claims 1 to 5, wherein the heating device is disposed at a level substantially same as a level at which the gap between the first lamination roller and the second lamination roller is provided.
 
7. The thermal combination equipment for electrodes according to any one of claims 1 to 6, wherein the heating device comprises a first heating component and a second heating component disposed opposite to each other, the first heating component is disposed on the first lamination roller, and the second heating component is disposed on the second lamination roller, and a gap between the first heating component and the second heating component is provided at a level substantially same as a level at which the gap between the first lamination roller and the second lamination roller is, and a distance between the first heating component and the second heating component matches a thickness of the electrode lamination, so that the first heating component and the second heating component can heat the electrode lamination from both sides of the electrode lamination, respectively.
 
8. The thermal combination equipment for electrodes according to claim 7, wherein the first heating component and the second heating component have similar shape and size, each of the first heating component and the second heating component comprises a heating plate, a heat insulation plate, and a heating wire, wherein the heating wire is embedded in the heating plate, the heat insulation plate is disposed on a side of the heating plate away from the heating wire, and the heating plate is disposed such that the heat insulation plate is between the heating plate and the first lamination roller, and a side of the heating plate away from the heat insulation plate, that is, a side of the heating plate on which the heating wire is disposed, faces the to-be-heated electrode lamination so as to heat the electrode lamination.
 
9. The thermal combination equipment for electrodes according to claim 7 or 8, wherein the first heating component and/or the second heating component each have a circular or rectangular surface for heating.
 
10. The thermal combination equipment for electrodes according to claim 8 or 9, wherein the first heating component and/or the second heating component each have one heating wire and the heating wire is embedded in the heating plate in a serpentine form.
 
11. The thermal combination equipment for electrodes according to claim 8 or 9, wherein the first heating component and/or the second heating component each have a plurality of heating wires, and the heating wires are embedded in the heating plate in a parallel and side-by-side manner.
 
12. The thermal combination equipment for electrodes according to any one of claims 1 to 11, wherein the thermal combination equipment for electrodes further comprises a support seat and a pressing cylinder, wherein the support seat is disposed on the base, and the pressing cylinder is disposed on the support seat and is connected with the first lamination roller such that the first lamination roller apply a downward pressure to the electrode lamination.
 
13. The thermal combination equipment for electrodes according to any one of claims 1 to 12, wherein the thermal combination equipment for electrodes further comprises an auxiliary cylinder, a sliding plate, and a connection plate, wherein the auxiliary cylinder is disposed on the support seat, the first lamination roller is disposed on the connection plate, and the connection plate is connected with the support seat via the sliding plate, so that the auxiliary cylinder drives the first lamination roller which is disposed on the connection plate to slide up and down along the sliding plate to adjust the distance between the first lamination roller and the second lamination roller.
 
14. The thermal combination equipment for electrodes according to any one of claims 1 to 13, wherein the thermal combination equipment for electrodes further comprises a transition roller, and the transition roller is disposed on the base and is on a side of the electrode lamination device away from the heating device, the transition roller is configured to convey the laminated electrode lamination.
 
15. A thermal combination equipment for electrodes, characterized in that the thermal combination equipment for electrodes comprises a base, a heating device, a transition roller, and an electrode lamination device disposed on the base, wherein the heating device is disposed in the electrode lamination device;
the electrode lamination device comprises a first lamination roller, a second lamination roller, and a driving device, wherein both the first lamination roller and the second lamination roller are connected with the driving device, the first lamination roller and the second lamination roller are disposed side by side, and a gap allowing an electrode lamination to pass therethrough is provided between the first lamination roller and the second lamination roller, the first lamination roller and the second lamination roller have similar shape and size and an outer surface of each of the first lamination roller and the second lamination roller is provided with a plurality of grooves which are sequentially spaced apart from one another, the heating device is configured to heat the electrode lamination, the heated electrode lamination is conveyed to the gap between the first lamination roller and the second lamination roller so as to be thermo-laminated by the first lamination roller and the second lamination roller, and the transition roller is disposed on the base and is on a side of the electrode lamination device away from the heating device, and the transition roller is configured to convey the laminated electrode lamination.
 
16. A method for thermocompression of an electrode lamination using the thermal combination equipment for electrodes according to any one of claims 1 to 15, characterized by comprising steps of: heating an electrode lamination using the heating device, and conveying the heated electrode lamination to the gap between the first lamination roller and the second lamination roller so that the heated electrode lamination is thermo-laminated by the first lamination roller and the second lamination roller.
 
17. The method for thermocompression of an electrode lamination according to claim 16, wherein the first lamination roller has the similar shape and size as those of the second lamination roller, and the first lamination roller is provided with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.
 
18. The method for thermocompression of an electrode lamination according to claim 16 or 17, wherein the second lamination roller is provided with a plurality of grooves which have similar shape and size and are sequentially spaced apart from one another.
 
19. The method for thermocompression of an electrode lamination according to any one of claims 16 to 18, wherein each groove is an annular groove circumferentially provided at the periphery of the respective lamination roller.
 
20. The method for thermocompression of an electrode lamination according to any one of claims 16 to 19, wherein the driving device comprises a servo motor, a first driving component, and a second driving component, the first driving component is connected with the first lamination roller, the second driving component is connected with the second lamination roller, and the servo motor is connected with both of the first driving component and the second driving component so as to simultaneously drive the first driving component and the second driving component, such that the first lamination roller and the second lamination roller are simultaneous driven to rotate, and the first lamination roller and the second lamination roller are rotated at same peripheral velocity and in opposite directions.
 




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Cited references

REFERENCES CITED IN THE DESCRIPTION



This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description