US 12,136,839 B2
Pre-charge circuit and battery system having the same
Yangsoo An, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/608,029
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Sep. 24, 2020, PCT No. PCT/KR2020/012971
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2021/080198, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 10-2019-0130846 (KR), filed on Oct. 21, 2019.
Prior Publication US 2022/0216702 A1, Jul. 7, 2022
Int. Cl. H02J 7/00 (2006.01); H03K 17/687 (2006.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 10/46 (2006.01)
CPC H02J 7/0029 (2013.01) [H02J 7/0063 (2013.01); H02J 7/007 (2013.01); H03K 17/6871 (2013.01); H01M 10/425 (2013.01); H01M 2010/4271 (2013.01); H01M 10/441 (2013.01); H01M 10/46 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A pre-charge circuit for a battery pack, the pre-charge circuit comprising:
a first metal-oxide field effect transistor (MOSFET) and a second MOSFET connected in series between a first electrode of the battery pack and an output terminal thereof;
a third MOSFET connected in parallel with the first MOSFET;
a fourth MOSFET connected in parallel with the second MOSFET;
a first resistor connected in parallel to the first MOSFET and the third MOSFET; and
a second resistor connected in parallel to the second MOSFET and the fourth MOSFET,
wherein a first end of the first resistor is connected to first ends of the first MOSFET and the third MOSFET at a first node, and a second end of the first resistor is connected to second ends of the first MOSFET and the third MOSFET at a second node,
wherein a first end of the second resistor is connected to first ends of the second MOSFET and the fourth MOSFET at a third node, and a second end of the second resistor is connected to second ends of the second MOSFET and the fourth MOSFET at a fourth node,
wherein the first resistor and the second resistor are connected in series by being connected to a wire directly connecting the second node to the third node.