US 12,420,667 B2
Battery pack internal short circuit detection method and related apparatus, and electric vehicle
Rui Yang, Shanghai (CN); Wei Cai, Shenzhen (CN); and Lulu Zheng, Shanghai (CN)
Assigned to SHENZHEN YINWANG INTELLIGENT TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by SHENZHEN YINWANG INTELLIGENT TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Sep. 30, 2021, as Appl. No. 17/490,242.
Application 17/490,242 is a continuation of application No. PCT/CN2020/080006, filed on Mar. 18, 2020.
Claims priority of application No. 201910265369.8 (CN), filed on Apr. 2, 2019.
Prior Publication US 2022/0016996 A1, Jan. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B60L 58/18 (2019.01); G01R 31/3835 (2019.01); G01R 31/52 (2020.01)
CPC B60L 58/18 (2019.02) [G01R 31/3835 (2019.01); G01R 31/52 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A battery pack internal short circuit detection method comprising:
measuring voltages of a reference battery of a battery pack and a target battery of the battery pack during a first charging process of the battery pack, wherein a voltage value of the reference battery at a first moment (t1) is a first voltage (Vset1), wherein a voltage value of the target battery at t1 is a second voltage (V2(t1)), and wherein t1 is during the first charging process;
measuring voltages of the reference battery and the target battery during a second charging process of the battery pack, wherein a voltage value of the reference battery at a second moment (t2) is Vset1, wherein a voltage value of the target battery at t2 is a third voltage (V2(t2)), and wherein t2 is during the second charging process; and
determining, based on V2(t1) and V2(t2), whether the target battery has an internal short circuit.