US 12,422,493 B2
Insulation resistance measuring device
Min Woo Kim, Daejeon (KR); Jang Hyeok Choi, Daejeon (KR); and Tae Youn Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/269,855
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 9, 2022, PCT No. PCT/KR2022/017562
§ 371(c)(1), (2) Date Jun. 27, 2023,
PCT Pub. No. WO2023/085777, PCT Pub. Date May 19, 2023.
Claims priority of application No. 10-2021-0155752 (KR), filed on Nov. 12, 2021.
Prior Publication US 2024/0319284 A1, Sep. 26, 2024
Int. Cl. G01R 31/389 (2019.01)
CPC G01R 31/389 (2019.01) 8 Claims
OG exemplary drawing
 
1. An insulation resistance measuring device for determining a positive insulation resistor disposed between a positive electrode of a battery pack and a ground and a negative insulation resistor disposed between the ground and a negative electrode of the battery pack, comprising:
first and second resistors connected in series between the positive electrode of the battery pack and the ground;
third and fourth resistors connected in series between the ground and the negative electrode of the battery pack;
an output terminal connected between the third and fourth resistors; and
a switch connected between a contact between the first and second resistors and the negative electrode of the battery pack, wherein the insulation resistance measuring device is configured to measure a first voltage at the output terminal when the switch is closed and a second voltage at the output terminal when the switch is open, and determine each of a positive insulation resistance of the positive insulation resistor and a negative insulation resistance of the negative insulation resistor based on the first voltage and the second voltage.