US 12,394,999 B2
Charging control method and charging control apparatus
Xin Yao, Shenzhen (CN); and Xiaohu He, Dongguan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Mar. 2, 2022, as Appl. No. 17/685,353.
Application 17/685,353 is a continuation of application No. PCT/CN2020/113315, filed on Sep. 3, 2020.
Claims priority of application No. 201910829318.3 (CN), filed on Sep. 3, 2019.
Prior Publication US 2022/0190626 A1, Jun. 16, 2022
Int. Cl. H02J 7/00 (2006.01); H01M 10/44 (2006.01)
CPC H02J 7/007182 (2020.01) [H01M 10/44 (2013.01); H02J 7/00032 (2020.01); H02J 7/0047 (2013.01); H02J 7/0029 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A charging control method, comprising:
sending first control information to a charging apparatus, wherein the first control information is used to command the charging apparatus to charge a secondary battery using a first charging current;
sequentially performing an adjustment step for each of a plurality of charging currents, wherein the adjustment step comprises:
obtaining a voltage value of a battery voltage of the secondary battery detected by the charging apparatus; and
sending second control information to the charging apparatus after the voltage value of the battery voltage of the secondary battery reaches a first voltage threshold corresponding to a kth charging current,
wherein the second control information is used to indicate the charging apparatus to continue to perform constant current charging on the secondary battery by using a (k+1)th charging current; a current value of the (k+1)th charging current is less than a current value of the kth charging current,
wherein the first voltage threshold corresponding to the kth charging current is greater than a limited charge voltage, and a difference obtained by subtracting a voltage value of the limited charge voltage from the first voltage threshold corresponding to the kth charging current is not greater than a safe voltage difference corresponding to the kth charging current; k is each positive integer from 1 to m, and a current value of an (m+1)th charging current meets a charging cut-off condition; and
wherein the current value of the (k+1)th charging current is obtained based on the following method:
determining the current value of the (k+1)th charging current based on a preset proportion;
determining a reduction amplitude corresponding to a current interval to which the current value of the kth charging current belongs, and determining the current value of the (k+1)th charging current based on the reduction amplitude; or
obtaining a battery temperature of the secondary battery, determining a reduction amplitude corresponding to a temperature interval in which the battery temperature is located, and determining the current value of the (k+1)th charging current based on the reduction amplitude; and
sending termination information to the charging apparatus, wherein the termination information is used to indicate the charging apparatus to end charging.