US 12,451,719 B2
Battery pack, battery system and precharge method
Mi-So Park, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/919,702
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 5, 2021, PCT No. PCT/KR2021/013638
§ 371(c)(1), (2) Date Oct. 18, 2022,
PCT Pub. No. WO2022/075712, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 10-2020-0128999 (KR), filed on Oct. 6, 2020.
Prior Publication US 2023/0144351 A1, May 11, 2023
Int. Cl. H02J 7/34 (2006.01); H01M 10/42 (2006.01); H01M 10/46 (2006.01); H02J 7/00 (2006.01)
CPC H02J 7/345 (2013.01) [H01M 10/4264 (2013.01); H01M 10/46 (2013.01); H02J 7/00032 (2020.01); H02J 7/0036 (2013.01); H02J 7/0063 (2013.01); H02J 2207/50 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
a battery cell;
a main relay provided on a charging and discharging path of the battery cell;
a precharge relay;
a precharge resistor, the precharge relay and the precharge resistor being connected in parallel to the main relay on the charging and discharging path;
a connector connected to a load including a capacitor;
a communication part configured to receive a capacitance of the capacitor from the load through the connector, when the load is connected to the connector; and
a controller configured to:
obtain the capacitance from the communication part,
calculate a duty ratio corresponding to the capacitance, and
precharge the capacitor by controlling an operation state of the precharge relay according to the calculated duty ratio.