US 12,259,438 B2
Apparatus and method for diagnosing battery
Young Jin Kim, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/763,245
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Dec. 9, 2020, PCT No. PCT/KR2020/017927
§ 371(c)(1), (2) Date Mar. 24, 2022,
PCT Pub. No. WO2021/125674, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 10-2019-0172450 (KR), filed on Dec. 20, 2019.
Prior Publication US 2022/0357404 A1, Nov. 10, 2022
Int. Cl. G01R 31/38 (2006.01); G01R 31/367 (2019.01); G01R 31/3835 (2019.01); G08B 21/18 (2006.01)
CPC G01R 31/3835 (2019.01) [G01R 31/367 (2019.01); G08B 21/18 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus for diagnosing a battery, the apparatus comprising:
a voltage measurer configured to measure a voltage of a battery cell;
a controller configured to:
calculate a fitting equation for the voltage of the battery cell; and
diagnose whether or not the battery cell is abnormal based on the fitting equation for the voltage of the battery cell; and
an alarm configured to generate a warning alarm when it is determined that an abnormality has occurred in the battery cell,
wherein the controller is configured to diagnose that the battery is abnormal when a difference between the voltage of the battery cell measured by the voltage measurer and a model voltage determined by the fitting equation for the voltage of the battery cell is greater than or equal to a reference value,
wherein the reference value is set based on a predetermined measurement error value of the voltage measurer and a measurement range of the voltage measurer, and
wherein the controller is configured to calculate the fitting equation for the voltage in a rest section after charging of the battery cell is completed to determine whether a voltage drop phenomenon due to an internal short of the battery cell occurs during the rest section.