US 11,817,728 B2
Battery protection circuit and battery apparatus including the same
Hyeoncheol Jeong, Yongin-si (KR); Sanggu Lee, Yongin-si (KR); and Kyongpil Jin, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Aug. 24, 2021, as Appl. No. 17/409,980.
Claims priority of application No. 10-2020-0110372 (KR), filed on Aug. 31, 2020.
Prior Publication US 2022/0069608 A1, Mar. 3, 2022
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/00308 (2020.01) [H02J 7/0036 (2013.01); H02J 7/0047 (2013.01); H02J 7/0029 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A battery protection circuit, comprising:
a detection circuit portion that outputs a wake-up signal when a voltage is input to an outer terminal, the detection circuit portion including:
a first resistor, a second resistor, and a second diode connected in series between the outer terminal and a ground;
a first diode connected between a node between the first resistor and the second resistor and the outer terminal; and
a transistor connected between the outer terminal and the controller and controlled by a voltage of the node between the first resistor and the second resistor;
a controller that outputs a switching control signal when the wake-up signal is received from the detection circuit portion; and
a switching portion that controls a connection of a battery module and the outer terminal according to the switching control signal.