Title:
BATTERY DIAGNOSIS APPARATUS, BATTERY DIAGNOSIS METHOD, BATTERY PACK, AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/224414
Kind Code:
A1
Abstract:
A battery diagnosis apparatus according to the present invention is to diagnose a cell group including a plurality of battery cells mounted on an electric vehicle and connected in series, and comprises: a voltage sensing circuit configured to periodically generate a voltage signal indicating a cell voltage of each battery cell while the electric vehicle is driven; and a control circuit configured to accumulate and store a cell voltage determined from the voltage signal in a memory unit, and generate time series data indicating a change over time of the cell voltage of each battery cell by using the accumulated cell voltage of each battery cell. The control circuit is configured to: (i) determine a first average cell voltage and a second average cell voltage of each battery cell on the basis of the time series data [wherein the first average cell voltage corresponds to a short-term moving average, and the second average cell voltage corresponds to a long-term moving average]; and (ii) detect an abnormality in the voltage of each battery cell on the basis of a difference between the first average cell voltage and the second average cell voltage.
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Inventors:
SUNG YONG-CHUL (KR)
AN YANG-SOO (KR)
AN YANG-SOO (KR)
Application Number:
PCT/KR2023/006797
Publication Date:
November 23, 2023
Filing Date:
May 18, 2023
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
G01R31/392; G01R19/00; G01R19/10; G01R19/165; G01R31/36; G01R31/3835; G01R31/388; G01R31/396; H01M10/052
Foreign References:
| JP2020119712A | 2020-08-06 | |||
| KR20120096615A | 2012-08-31 | |||
| JP2014134467A | 2014-07-24 | |||
| JP2019039825A | 2019-03-14 | |||
| KR20220015790A | 2022-02-08 |
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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