US 11,742,685 B2
Charger and charging method
Takashi Kanou, Tokyo (JP); Kenji Kitamura, Tokyo (JP); Yasunari Mizoguchi, Tokyo (JP); Takeshi Yoshida, Tokyo (JP); and Michiko Sato, Tokyo (JP)
Assigned to FDK CORPORATION, Tokyo (JP)
Appl. No. 17/309,390
Filed by FDK CORPORATION, Tokyo (JP)
PCT Filed Sep. 20, 2019, PCT No. PCT/JP2019/036873
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2020/115991, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-230156 (JP), filed on Dec. 7, 2018.
Prior Publication US 2022/0029445 A1, Jan. 27, 2022
Int. Cl. H02J 7/00 (2006.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01); H01M 50/269 (2021.01); H01M 50/202 (2021.01)
CPC H02J 7/007182 (2020.01) [H01M 10/425 (2013.01); H01M 10/44 (2013.01); H01M 10/48 (2013.01); H01M 50/202 (2021.01); H01M 50/269 (2021.01); H02J 7/0034 (2013.01); H02J 7/0045 (2013.01); H02J 7/0047 (2013.01); H02J 7/00306 (2020.01); H01M 2010/4271 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A charger comprising:
a battery accommodating unit including a first contact and a second contact configured to be respectively in contact with electrode terminals of a battery accommodated therein;
a high-potential power supply line and a low-potential power supply line to which power for charging the battery is supplied;
a connection switching circuit capable of switching between a first connection state in which the first contact is connected to the high-potential power supply line and the second contact is connected to the low-potential power supply line and a second connection state in which the second contact is connected to the high-potential power supply line and the first contact is connected to the low-potential power supply line; and
a control device for controlling the connection switching circuit to acquire a battery voltage of the battery and perform charging control on the battery,
wherein the control device performs pre-charging on the battery in the first connection state, and when the battery voltage does not exceed a predetermined set voltage, the control device switches the first connection state to the second connection state and performs the pre-charging on the battery, but when the battery voltage exceeds the set voltage, the control device performs normal charging on the battery.