Title:
BATTERY DIAGNOSIS DEVICE, BATTERY DIAGNOSIS METHOD, BATTERY PACK AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2024/058623
Kind Code:
A1
Abstract:
A battery diagnosis device according to the present invention comprises: a voltage sensing circuit for generating a voltage signal that indicates the cell voltage of a battery cell; a storage medium for storing time series data of the cell voltage; and a control circuit operatively coupled to the voltage sensing circuit and the storage medium. The control circuit (i) receives the voltage signal so as to record, in the storage medium, the time series data of the cell voltage, (ii) determines, on the basis of the time series data, a first cell voltage gradient and a second cell voltage gradient in a first time interval and a second time interval that differ from each other, (iii) determines, on the basis of the time series data, an average gradient of the cell voltage in a third time interval between the first time interval and the second time interval, and (iv) sets the first cell voltage gradient and the second cell voltage gradient as boundary conditions of the normal gradient range, and diagnoses a voltage anomaly of a battery cell if a condition in which the average gradient of the cell voltage deviates from the normal gradient range is established.
Inventors:
YEOM IN-CHEOL (KR)
Application Number:
PCT/KR2023/013984
Publication Date:
March 21, 2024
Filing Date:
September 15, 2023
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
G01R31/3835; G01R19/00; G01R19/12; G01R19/165; G01R31/36; G01R31/371; G01R31/392; G01R31/396
Foreign References:
| KR20220019637A | 2022-02-17 | |||
| KR20190048089A | 2019-05-09 | |||
| KR20210023543A | 2021-03-04 | |||
| KR20190041360A | 2019-04-22 | |||
| KR20220098981A | 2022-07-12 |
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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