# US 2008/0187800 A1 · Water recycling system for fuel cell

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- Number: US 2008/0187800 A1
- Document ID: US20080187800A1
- Status: Published application
- Kind: A1
- Application number: 11/537,938
- Filed: 2006-10-02
- Published: 2008-08-07
- Earliest claimed: 2006-10-02
- Inventors: CHIEN-AN CHEN; WEI-JUI CHUANG; CHIEN-CHOU CHEN
- Web page: https://patentgrep.com/patent/US20080187800A1

## CPC

- H01M 8/04194: {Concentration measuring cells}
- H01M 8/04164: {by condensers, gas-liquid separators or filters}
- H01M 8/04313: characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M 8/04447: {of anode reactants at the inlet or inside the fuel cell}
- H01M 8/045: {of anode reactants at the inlet or inside the fuel cell}
- H01M 8/04798: {of fuel cell reactants}
- H01M 8/04835: {of fuel cell reactants}
- H01M 8/1009: with one of the reactants being liquid, solid or liquid-charged (H01M8/12 takes precedence)
- 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 water recycling system for fuel cell includes a water trough, a first pump, a fuel tank, a mixing tank and a second pump. The water trough receives condensed water from the condenser and connects with a first throttle valve. The first pump is connected to the first throttle valve. The fuel tank is connected to a second throttle valve, and the second throttle valve is connected to the first pump. The mixing tank is connected to the first pump and the second pump respectively. A thickness sensor and a level sensor are arranged in the mixing tank to detect thickness of the fuel and liquid level of the mixing liquid in the mixing tank. The first throttle valve, the first pump, the second throttle valve, the second pump, the thickness sensor and the level sensor are electrically connected the to a micro control unit so as to actuate the first throttle valve, the first pump, the second throttle valve and the second pump under control for regulating and controlling thickness of the fuel in the fuel tank

## Claims

### Claim 1

A water recycling system for fuel cell in which a condenser is connected to a fuel cell module for recycling moisture generated by the fuel cell module in operation, comprising:
a water trough, receiving condensed water from the condenser and connecting with a first throttle valve;
a first pump, being connected to the first throttle valve and sucking moisture passing through the first throttle valve;
a fuel tank, having fuel inside, being connected to a second throttle valve, and the second throttle valve being connected to the first pump for the fuel being capable of being pumped out via the first pump;
a mixing tank, being connected to the first pump for receiving mixing liquid of water and the fuel from the first pump; and
a second pump, being connected to the mixing tank for pumping the mixing liquid to the fuel cell module and supplying the fuel with proper thickness to the fuel cell module;
wherein, a thickness sensor and a level sensor are arranged in the mixing tank to detect thickness of the fuel and liquid level of the mixing liquid in the mixing tank; the first throttle valve, the first pump, the second throttle valve, the second pump, the thickness sensor and the level sensor are electrically connected to a micro control unit (MCU) and the MCU is capable of receiving and reading out data of fuel thickness detected by the thickness sensor and data of liquid level detected by the level sensor so as to control actuation of the first throttle valve, the first pump, the second throttle valve and the second pump for regulating and control the thickness of the fuel in the fuel tank.

### Claim 2 (depends on 1)

The water recycling system for fuel cell as defined in claim 1 further comprises a moisture collecting tank, which is disposed between the condenser and the water trough.