Title:
BATTERY DIAGNOSTIC DEVICE AND BATTERY DIAGNOSTIC METHOD
Document Type and Number:
WIPO Patent Application WO/2022/080835
Kind Code:
A1
Abstract:
A battery diagnostic device according to an embodiment of the present invention comprises: a measuring part configured to measure voltage and temperature of a battery; an ohmic resistance determining part configured to determine an ohmic resistance of the battery on the basis of an impedance profile generated with respect to the battery; and a control part configured to compare the voltage of the battery, which has been measured by the measuring part, with a reference voltage to calculate a voltage variance, compare the ohmic resistance determined by the ohmic resistance determining part with the reference resistance to calculate a resistance change rate, determine a degree of internal gas generation of the battery through magnitude comparison between the calculated resistance change rate and a reference resistance change rate, and determine the cause of internal gas generation of the battery through magnitude comparison between the calculated voltage variance and a reference voltage variance.
Inventors:
WOO KYUNG-HWA (KR)
BAE YOON-JUNG (KR)
CHA A-MING (KR)
BAE YOON-JUNG (KR)
CHA A-MING (KR)
Application Number:
PCT/KR2021/014051
Publication Date:
April 21, 2022
Filing Date:
October 12, 2021
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/48; G01R19/165; G01R31/36; G01R31/382; G01R31/389; H01M10/42; H01M10/615
Foreign References:
| JP2007103351A | 2007-04-19 | |||
| KR20180024545A | 2018-03-08 | |||
| KR101583373B1 | 2016-01-07 | |||
| KR102152572B1 | 2020-09-07 | |||
| KR20170083214A | 2017-07-18 | |||
| KR20200131450A | 2020-11-24 |
Other References:
See also references of EP 4167345A4
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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