US 12,438,164 B2
Fuel cell system
Heejoong Jang, Seoul (KR); and Hyoungsuk Woo, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Sep. 8, 2022, as Appl. No. 17/940,548.
Claims priority of application No. 10-2021-0120160 (KR), filed on Sep. 9, 2021.
Prior Publication US 2023/0072408 A1, Mar. 9, 2023
Int. Cl. H01M 8/04014 (2016.01); H01M 8/04007 (2016.01); H01M 8/04089 (2016.01); H01M 8/04119 (2016.01); H01M 8/04746 (2016.01); H01M 8/0612 (2016.01)
CPC H01M 8/04014 (2013.01) [H01M 8/04074 (2013.01); H01M 8/04097 (2013.01); H01M 8/04164 (2013.01); H01M 8/04753 (2013.01); H01M 8/0618 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A fuel cell system comprising:
a stack that generates electric power using reformed gas;
a fuel processing device that supplies the reformed gas to the stack;
a first gas passage that connects the stack and the fuel processing device, the first gas passage carrying the reformed gas discharged from the fuel processing device toward the stack;
a second gas passage that connects the stack and the fuel processing device, the second gas passage carrying an anode-off gas (AOG) discharged from the stack toward the fuel processing device;
a buffer tank that stores at least a portion of the AOG discharged from the stack;
a first buffer tank passage that connects the buffer tank and the second gas passage;
a second buffer tank passage that is coupled to the buffer tank;
a gas mixer that is connected to the second buffer tank passage and supplies the AOG stored in the buffer tank to the stack; and
a controller that controls the gas mixer to supply the AOG stored in the buffer tank to the stack so as to at least one of preheat the stack or remove air remaining in the stack.