US 12,228,616 B2
Method for detecting internal short circuit of battery, electronic apparatus, and storage medium
Boyang Liu, Dongguan (CN); and Xiaojie Tan, Dongguan (CN)
Assigned to Dongguan NVT Technology Limited, Dongguan (CN)
Filed by Dongguan NVT Technology Limited, Dongguan (CN)
Filed on Mar. 27, 2023, as Appl. No. 18/190,230.
Application 18/190,230 is a continuation of application No. PCT/CN2022/076687, filed on Feb. 17, 2022.
Claims priority of application No. 202110260512.1 (CN), filed on Mar. 10, 2021.
Prior Publication US 2023/0236253 A1, Jul. 27, 2023
Int. Cl. G01R 31/3842 (2019.01); G01R 31/389 (2019.01); G01R 31/52 (2020.01); H02J 7/00 (2006.01)
CPC G01R 31/3842 (2019.01) [G01R 31/389 (2019.01); G01R 31/52 (2020.01); H02J 7/0047 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for detecting internal short circuit of a battery, wherein the method comprises:
discharging the battery with a first current I1 at a moment t1;
calculating a first discharge voltage drop ΔV1 of the battery at a moment t1+dt, wherein ΔV1=V0−V1, V0 is a terminal voltage of the battery in a static state, and V1 is a terminal voltage of the battery at the moment t1+dt;
discharging the battery with a second current I2 at a moment t2, wherein I1≠I2;
calculating a second discharge voltage drop ΔV2 of the battery at a moment t2+dt, wherein ΔV2=V0−V2, and V2 is a terminal voltage of the battery at the moment t2+dt; and
determining, based on the first current I1, the first discharge voltage drop ΔV1, the second current I2, and the second discharge voltage drop ΔV2, whether the battery has an internal short circuit.