# US 2019/0173112 A1 · Fuel cell system

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- Number: US 2019/0173112 A1
- Document ID: US20190173112A1
- Status: Published application
- Kind: A1
- Application number: 16/161,057
- Filed: 2018-10-16
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: TAKEHIKO ISE; JUNJI MORITA; YOSHITO USUKI
- Web page: https://patentgrep.com/patent/US20190173112A1

## CPC

- H01M 8/04097: {with recycling of the reactants (H01M8/04119, H01M8/04104 take precedence)}
- H01M 8/04156: {with product water removal}
- H01M 8/04753: {of fuel cell reactants}
- H01M 8/0662: Treatment of gaseous reactants or gaseous residues, e.g. cleaning
- H01M 8/0687: {Reactant purification by the use of membranes or filters}
- H01M 2008/1095: {Fuel cells with polymeric electrolytes}
- H01M 2300/0082: Organic polymers
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A fuel cell system includes a polymer electrolyte fuel cell that generates electric power using fuel gas and oxidant gas, a fuel gas supply path through which the fuel gas is supplied to an anode inlet of the fuel cell, a recycle gas path through which anode off-gas discharged from an anode outlet of the fuel cell returns to the fuel gas supply path, a pressure booster that is arranged in the fuel gas supply path between a confluence portion and the anode inlet, the fuel gas supply path and the recycle gas path meeting each other in the confluence portion, and a discharge path through which an impurity mixed into the anode off-gas is discharged outside.

## Claims

### Claim 1

A fuel cell system comprising:
a polymer electrolyte fuel cell that generates electric power using fuel gas and oxidant gas;
a fuel gas supply path through which the fuel gas is supplied to an anode inlet of the fuel cell;
a recycle gas path through which anode off-gas discharged from an anode outlet of the fuel cell returns to the fuel gas supply path;
a pressure booster that is arranged in the fuel gas supply path between a confluence portion and the anode inlet, the fuel gas supply path and the recycle gas path meeting each other in the confluence portion; and
a discharge path through which an impurity mixed into the anode off-gas is discharged outside.

### Claim 2 (depends on 1)

The fuel cell system according to claim 1, further comprising
a flow rate regulator that is arranged in the recycle gas path and regulates a flow rate of the anode off-gas.

### Claim 3 (depends on 1)

The fuel cell system according to claim 1, wherein
the pressure booster is arranged above the confluence portion.

### Claim 4 (depends on 1)

The fuel cell system according to claim 1, further comprising
a gas liquid separator that is connected to the recycle gas path or to the fuel gas supply path further downstream than the confluence portion.