Title:
METHOD FOR ESTIMATING DEGREE OF AGING OF INTERNAL RESISTANCE OF BATTERY CELL, AND ELECTRIC VEHICLE AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2024/093484
Kind Code:
A1
Abstract:
The present application relates to the technical field of internal-resistance measurement for battery cells. Disclosed are a method for estimating the degree of aging of the internal resistance of a battery cell, and an electric vehicle and a storage medium. The method comprises: acquiring a cycle aging parameter mapping relationship; calculating historical discharge capacities, corresponding to a plurality of first intervals at the current moment, of a battery cell to be subjected to estimation; according to the cycle aging parameter mapping relationship and the historical discharge capacities, obtaining cycle aging data of the battery cell to be subjected to estimation; acquiring a storage aging parameter mapping relationship; calculating historical standing durations, corresponding to a plurality of second intervals at the current moment, of the battery cell to be subjected to estimation; according to the storage aging parameter mapping relationship and the historical standing durations, obtaining storage aging data of the battery cell to be subjected to estimation; and according to the cycle aging data and storage aging data of the battery cell to be subjected to estimation, obtaining the degree of aging of the internal resistance of the battery cell. In the present application, estimation of the degree of aging of internal resistance is unrelated to a voltage and a current, such that the estimation precision can be improved.
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Inventors:
PENG CHENGQI (CN)
LI JIANJIE (CN)
LI JIANJIE (CN)
Application Number:
PCT/CN2023/115801
Publication Date:
May 10, 2024
Filing Date:
August 30, 2023
Export Citation:
Assignee:
SUNWODA MOBILITY ENERGY TECH CO LTD (CN)
International Classes:
G01R31/36
Foreign References:
| CN115728658A | 2023-03-03 | |||
| CN113791361A | 2021-12-14 | |||
| CN114636948A | 2022-06-17 | |||
| CN107991623A | 2018-05-04 | |||
| CN105353313A | 2016-02-24 | |||
| CN114355200A | 2022-04-15 | |||
| US20180306866A1 | 2018-10-25 | |||
| US20100138177A1 | 2010-06-03 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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