US 11,909,244 B2
Battery controller and method for suppression of lithium plating during charging
Haili Li, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Jul. 1, 2021, as Appl. No. 17/365,362.
Application 17/365,362 is a continuation of application No. PCT/CN2021/076274, filed on Feb. 9, 2021.
Prior Publication US 2022/0255336 A1, Aug. 11, 2022
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/00712 (2020.01) [H02J 7/0048 (2020.01); H02J 7/007182 (2020.01); H02J 2310/54 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A battery charging method, comprising:
performing a charging process on a battery; and
monitoring an electrical parameter of the battery during the charging process; wherein the charging process consists of the following steps:
when the electrical parameter of the battery reaches a first threshold, suspending charging of the battery and discharging the battery by applying a first negative pulse for a first duration of t1;
continuing to charge the battery after discharging the battery for the first duration of t1;
when the electrical parameter of the battery reaches a second threshold, suspending charging of the battery and discharging the battery by applying a second negative pulse for a second duration of t2; and
continuing to charge the battery after discharging the battery for the second duration of t2;
wherein the first duration t1 is greater than or equal to 3 seconds and less than 13 seconds, the second duration t2 is greater than 3 seconds and less than or equal to 13 seconds, and t1 is less than t2; and
wherein the electrical parameter is state of charge (SOC), and the first threshold is lower than the second threshold.