US 12,170,452 B2
Charging system and charger for reducing inrush current
Sesub Sim, Yongin-si (KR); and Jongsam Park, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Aug. 25, 2021, as Appl. No. 17/411,124.
Claims priority of application No. 10-2020-0113197 (KR), filed on Sep. 4, 2020.
Prior Publication US 2022/0077706 A1, Mar. 10, 2022
Int. Cl. H02J 7/00 (2006.01); H02H 9/00 (2006.01)
CPC H02J 7/00304 (2020.01) [H02H 9/001 (2013.01); H02J 7/0036 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A charging system, comprising:
a battery pack including at least one battery cell and a switch connected in series between first and second pack terminals, and a battery management module connected to a data terminal; and
a charger including a connector configured to detect a connection with the battery pack, a communicator configured to communicate with the battery management module through the data terminal, and a controller configured to control charging of the battery pack through the first and second pack terminals,
wherein the controller of the charger is configured to:
output a wake-up voltage between the first and second pack terminals to activate the battery management module when the connection with the battery pack is detected through the connector;
receive data indicating a value of a battery voltage from the battery management module through the communicator;
determine a charging start voltage based on the value of the battery voltage;
output the charging start voltage between the first and second pack terminals; and
start charging the battery pack by the switch being turned on by the battery management module after outputting the charging start voltage.