US 11,901,521 B2
Secondary battery system, charging method, and vehicle for charging with three different currents
Nobukatsu Sugiyama, Kanagawa (JP); Ena Ishii, Kanagawa (JP); Tomokazu Morita, Chiba (JP); and Yumi Fujita, Tokyo (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed on Dec. 4, 2020, as Appl. No. 17/111,589.
Application 17/111,589 is a division of application No. 15/904,257, filed on Feb. 23, 2018, granted, now 10,910,857.
Claims priority of application No. 2017-086462 (JP), filed on Apr. 25, 2017.
Prior Publication US 2021/0091574 A1, Mar. 25, 2021
Int. Cl. H01M 10/48 (2006.01); H01M 10/44 (2006.01); G01R 31/382 (2019.01); H02J 7/00 (2006.01); H01M 10/0525 (2010.01); B60L 3/00 (2019.01); H01M 4/587 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/44 (2013.01) [B60L 3/0046 (2013.01); H01M 10/0525 (2013.01); H01M 10/446 (2013.01); H01M 10/48 (2013.01); G01R 31/382 (2019.01); H01M 4/587 (2013.01); H01M 10/445 (2013.01); H01M 10/484 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01); H02J 7/0071 (2020.01)] 9 Claims
OG exemplary drawing
 
6. A charging method in a secondary battery having a continuous charging state including at least first to third sections, the first section being followed by the second section, and the second section being followed by the third section,
the charging method comprising:
measuring a volume change rate of the secondary battery; and
controlling a current flowing through the secondary battery based on the volume change rate of the secondary battery, wherein the controlling the current comprising:
controlling a current flowing through the secondary battery so as to be smaller than a predetermined current in the first and third sections; and
controlling the current flowing through the secondary battery so as to be larger than the predetermined current in the second section,
wherein the first section has a first volume change rate, the second section has a second volume change rate, and the third section has a third volume change rate, each one of the first to third volume change rates represents a relationship between a volume of the secondary battery and a charge amount of the secondary battery in a case where the predetermined current flows through the secondary battery, and
the second volume change rate is different from the first volume change rate and the third volume change rate.