(19)
(11) EP 4 178 001 A8

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

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
05.07.2023 Bulletin 2023/27

(43) Date of publication:
10.05.2023 Bulletin 2023/19

(21) Application number: 21923586.8

(22) Date of filing: 24.09.2021
(51) International Patent Classification (IPC): 
H01M 10/0525(2010.01)
H01M 10/0569(2010.01)
 H01M 10/0568(2010.01)
H01M 10/0567(2010.01)
(52) Cooperative Patent Classification (CPC):
Y02E 60/10; H01M 50/00
(86) International application number:
PCT/CN2021/120317
(87) International publication number:
WO 2023/044752 (30.03.2023 Gazette 2023/13)
(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

(71) Applicant: Contemporary Amperex Technology Co., Limited
Jiaocheng District Ningde Fujian 352100 (CN)

(72) Inventors:
  • WU, Zeli
    Ningde Fujian 352100 (CN)
  • HAN, Changlong
    Ningde Fujian 352100 (CN)
  • ZHANG, Cuiping
    Ningde Fujian 352100 (CN)
  • JIANG, Bin
    Ningde Fujian 352100 (CN)
  • AI, Zhiyong
    Ningde Fujian 352100 (CN)
  • HUANG, Lei
    Ningde Fujian 352100 (CN)

(74) Representative: Ziebig Hengelhaupt Intellectual Property Attorneys Patentanwaltsanwaltskanzlei PartGmbB 
Leipziger Straße 49
10117 Berlin
10117 Berlin (DE)

   


(54) LITHIUM ION BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRIC DEVICE


(57) The present application discloses a lithium-ion battery, which has a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte solution comprising a lithium salt and a solvent, wherein
based on the total weight of the electrolyte solution, the percentage by mass of the lithium salt in the electrolyte solution is a%, and the lithium ion battery satisfies 5<a<10; and
the load on single side of the negative electrode sheet is W grams per 1540.25 mm2, and a and W satisfy 25≤a/W≤50; and the solvent comprises dimethyl carbonate.
The lithium ion battery has good safety and high-temperature cycling performance, and also has good kinetic performance.