US 12,146,919 B2
Short circuit detection method for starting battery
Zhujun Yan, Hefei (CN); Wei Yao, Hefei (CN); Degang Xu, Hefei (CN); Liulin Wang, Hefei (CN); and Ming Chen, Hefei (CN)
Assigned to NIO Technology (Anhui) Co., Ltd., Hefei (CN)
Filed by NIO TECHNOLOGY (ANHUI) CO., LTD, Hefei (CN)
Filed on Aug. 19, 2022, as Appl. No. 17/891,581.
Claims priority of application No. 202110960833.2 (CN), filed on Aug. 20, 2021.
Prior Publication US 2023/0057159 A1, Feb. 23, 2023
Int. Cl. G01R 31/3842 (2019.01); B60L 3/00 (2019.01); B60L 58/12 (2019.01); G01R 31/396 (2019.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01)
CPC G01R 31/3842 (2019.01) [B60L 3/0046 (2013.01); G01R 31/396 (2019.01); H01M 10/446 (2013.01); H01M 10/48 (2013.01); B60L 58/12 (2019.02); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); H01M 2220/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A short circuit detection method for a starting battery, the method comprising:
acquiring status information of the starting battery in real time, wherein the status information comprises current and time;
estimating a state of charge (SOC) of the starting battery by an ampere-hour integral based on the status information; and
confirming, based on an estimation result for the SOC, whether the starting battery is short-circuited;
characterized in that the step of confirming comprises:
drawing an SOC curve according to an estimation result for the SOC, and
confirming that the starting battery is in a short-circuited condition when the SOC curve initially increases within a predetermined period of time and then maintains constant, or
confirming that the starting battery is not short-circuited when the SOC curve initially decreases and then increases in cycle.