US 12,334,766 B2
Pack battery charging method, pack battery, and power source device
Tsuyoshi Morimoto, Osaka (JP); Tomomi Kaino, Osaka (JP); Toru Nishikawa, Osaka (JP); Naoto Matsuda, Osaka (JP); and Takanori Harada, Osaka (JP)
Assigned to PANASONIC ENERGY CO., LTD., Moriguchi (JP)
Appl. No. 17/429,327
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Feb. 18, 2020, PCT No. PCT/JP2020/006227
§ 371(c)(1), (2) Date Aug. 6, 2021,
PCT Pub. No. WO2020/175233, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-033809 (JP), filed on Feb. 27, 2019.
Prior Publication US 2022/0109195 A1, Apr. 7, 2022
Int. Cl. H02J 7/00 (2006.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01)
CPC H02J 7/005 (2020.01) [H01M 10/44 (2013.01); H01M 10/48 (2013.01); H02J 7/00302 (2020.01); H02J 7/0031 (2013.01); H02J 7/007 (2013.01); H02J 7/007182 (2020.01)] 13 Claims
OG exemplary drawing
 
1. A pack battery charging method for connecting a pack battery to a charger and charging the pack battery by switching from constant-current charging to constant-voltage charging, the method comprising:
detecting, by the pack battery, a degree of deterioration of a battery and a charging voltage at which the charger charges the pack battery;
determining a charging termination current based on both a supply voltage of the charger and the degree of deterioration of the battery for terminating charging of the pack battery during the constant-voltage charging; and
terminating charging of the pack battery when a charging current for charging the pack battery decreases to the charging termination current during the constant-voltage charging as the charging voltage reaches the supply voltage of the charger.