(19)
(11)EP 2 713 175 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
06.12.2017 Bulletin 2017/49

(43)Date of publication A2:
02.04.2014 Bulletin 2014/14

(21)Application number: 13165180.4

(22)Date of filing:  24.04.2013
(51)International Patent Classification (IPC): 
G01R 31/36(2006.01)
G01R 15/12(2006.01)
G01R 1/36(2006.01)
G01R 27/16(2006.01)
(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

(30)Priority: 29.09.2012 CN 201210377927

(71)Applicant: Fluke Precision Measurement Ltd.
Norwich Airport Norwich Norfolk NR6 6JB (GB)

(72)Inventor:
  • Fan, Songnan
    200335 Shanghai (CN)

(74)Representative: HGF Limited 
8th Floor 140 London Wall
London EC2Y 5DN
London EC2Y 5DN (GB)

  


(54)Battery tester


(57) The present application provides a battery tester capable of measuring resistance and voltage of a battery using the same input channel. When measuring the battery resistance, a testing signal circuit of the battery tester is electrically coupled to two electrodes of a subject battery to conduct a testing signal used in the battery resistance measurement. A response sensing circuit of the battery tester is also electrically coupled to the two electrodes of the subject battery to measure a response signal across the two electrodes of the subject battery. A resistance measuring module is electrically coupled to the response sensing circuit to measure the battery resistance based on the response signal detected by the response sensing circuit. The battery tester also comprises a circuit breaker, capable of disconnecting the subject battery from the testing signal circuit, and disconnecting the resistance measuring module from the response sensing circuit. Moreover, the battery tester can also provide automatic protection for the battery resistance measuring module.







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