US 12,243,998 B2
Power supply system and method of power supply
Shiro Yagawa, Wako (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Jan. 20, 2022, as Appl. No. 17/579,627.
Claims priority of application No. 2021-011084 (JP), filed on Jan. 27, 2021.
Prior Publication US 2022/0238944 A1, Jul. 28, 2022
Int. Cl. H01M 16/00 (2006.01); H01M 8/04225 (2016.01); H01M 8/04858 (2016.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H01M 10/46 (2006.01)
CPC H01M 16/006 (2013.01) [H01M 8/04225 (2016.02); H01M 8/04932 (2013.01); H01M 10/425 (2013.01); H01M 10/44 (2013.01); H01M 10/46 (2013.01); H01M 2220/20 (2013.01); H01M 2250/20 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A power supply system comprising:
a fuel cell which is able to generate power;
a power storage device which stores the power generated by the fuel cell;
a converter which converts power from the fuel cell or the power storage device and switches between supply of power from the fuel cell to an auxiliary device and supply of power from the power storage device to the auxiliary device; and
a controller which controls at least the switching of the converter,
wherein the converter includes a first terminal connected to the fuel cell, a second terminal connected to the power storage device, and a third terminal connected to the auxiliary device, and switches supply of the power to the auxiliary device by switching between a conductive state and an open state for the first terminal and the third terminal or for the second terminal and the third terminal on the basis of the control of the controller,
wherein when the controller determines that the power storage device needs to be charged on the basis of a state of charge of the power storage device, the controller controls the converter so that at least the first terminal and the second terminal are in a conductive state, and
wherein the controller converts power from the fuel cell to have a voltage value which is equal to or lower than an upper limit value of an allowable voltage of the auxiliary device to which the power is supplied and is higher than a voltage value of the power storage device, and supplies power from the fuel cell to the auxiliary device while also supplying power to the power storage device.