Activation method for fuel cell and device therefor

Inventor: Koichiro Sato (Tokyo, JP)

Assignee: Honda Motor Co., Ltd.

H01M8/1004 H01M8/04014 H01M8/04514 H01M8/04522 H01M8/04873

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Quick Facts

Patent No.: US 12,689,051
App. No.: 18/122,981
Granted: Jul 21, 2026
Kind: B2

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Abstract

In a case that activation is implemented on a fuel cell, a variable voltage is applied to a membrane electrode assembly while a first gas is supplied to an anode and a second gas is supplied to a cathode. Thereafter, while a constant voltage is applied to the membrane electrode assembly, liquid water is generated at the anode or the cathode. Alternatively, the membrane electrode assembly is made to generate electricity. During the generation of electricity, liquid water is generated at the anode or the cathode.

Claims (41)

1 . An activation method for a fuel cell, for activating a membrane electrode assembly for use by the fuel cell including an electrolyte membrane and an anode and a cathode sandwiching the electrolyte membrane therebetween, the activation method comprising:

applying a variable voltage from a voltage application unit to the membrane electrode assembly while supplying a first gas to the anode from an anode side flow path, and supplying a second gas to the cathode from a cathode side flow path; and

applying a voltage of a constant value from the voltage application unit to the membrane electrode assembly while supplying the first gas to the anode from the anode side flow path, and supplying the second gas to the cathode from the cathode side flow path,

wherein, in the applying of the voltage of the constant value, liquid water is generated in the anode or the cathode, and an amount of the liquid water is adjusted by a liquid water amount adjustment unit.

2 . The activation method for the fuel cell according to claim 1 , wherein:

a temperature adjustment unit configured to adjust a dew point of the anode side flow path and a dew point of the cathode side flow path is used as the liquid water amount adjustment unit; and

the temperature adjustment unit includes a first jig in which a first heat pipe configured to exchange heat with the first gas is provided, and a second jig in which a second heat pipe configured to exchange heat with the second gas is provided.

3 . The activation method for the fuel cell according to claim 2 , wherein:

the temperature adjustment unit includes a humidification state acquisition unit configured to acquire an index in relation to a state of humidification of the membrane electrode assembly; and

at a time when the index acquired by the humidification state acquisition unit has reached a predetermined threshold value, the temperature adjustment unit changes a temperature of the first heat pipe and a temperature of the second heat pipe.

4 . The activation method for the fuel cell according to claim 2 , wherein the anode side flow path is formed in the first jig, the cathode side flow path is formed in the second jig, and the membrane electrode assembly is sandwiched alone between the first jig and the second jig.

5 . An activation method for a fuel cell, for activating a membrane electrode assembly for use by the fuel cell including an electrolyte membrane and an anode and a cathode sandwiching the electrolyte membrane therebetween, the activation method comprising:

causing electrical power to be generated in the membrane electrode assembly while supplying a first gas to the anode from an anode side flow path, and supplying a second gas to the cathode from a cathode side flow path,

wherein, in the causing the electrical power to be generated, a generated electrical voltage of the membrane electrode assembly is repeatedly raised and lowered, and an amount of liquid water generated in the anode or the cathode is adjusted by a liquid water amount adjustment unit, and

a temperature adjustment unit configured to adjust a dew point of the anode side flow path and a dew point of the cathode side flow path is used as the liquid water amount adjustment unit; and

6 . The activation method for the fuel cell according to claim 5 , wherein:

the temperature adjustment unit includes a humidification state acquisition unit configured to acquire an index in relation to a state of humidification of the membrane electrode assembly; and

7 . The activation method for the fuel cell according to claim 5 , wherein the anode side flow path is formed in the first jig, the cathode side flow path is formed in the second jig, and the membrane electrode assembly is sandwiched alone between the first jig and the second jig.

8 . An activation device that activates a membrane electrode assembly for use by a fuel cell including an electrolyte membrane and an anode and a cathode sandwiching the electrolyte membrane therebetween, the activation device comprising:

a first gas supply line configured to supply a first gas to the anode;

a second gas supply line configured to supply a second gas to the cathode;

a voltage application unit configured to apply a voltage to the membrane electrode assembly; and

a liquid water amount adjustment unit configured to cause liquid water to be generated in the anode or the cathode, and to adjust an amount of the liquid water, wherein:

the liquid water amount adjustment unit includes a temperature adjustment unit configured to adjust a dew point of an anode side flow path and a dew point of a cathode side flow path; and

9 . The activation device according to claim 8 , wherein:

the temperature adjustment unit includes a humidification state acquisition unit configured to acquire an index in relation to a state of humidification of the membrane electrode assembly; and

the temperature adjustment unit changes a temperature of the first heat pipe and a temperature of the second heat pipe at a time when the index acquired by the humidification state acquisition unit has reached a predetermined threshold value.

10 . The activation device according to claim 8 , wherein the anode side flow path is formed in the first jig, the cathode side flow path is formed in the second jig, and the membrane electrode assembly is sandwiched alone between the first jig and the second jig.

11 . An activation device that activates a membrane electrode assembly for use by a fuel cell including an electrolyte membrane and an anode and a cathode sandwiching the electrolyte membrane therebetween, the activation device comprising:

a first gas supply line configured to supply, to the anode, a first gas in order to generate electricity;

a second gas supply line configured to supply, to the cathode, a second gas in order to generate electricity; and

a liquid water amount adjustment unit configured to adjust an amount of liquid water generated at the anode or the cathode while the membrane electrode assembly is generating electricity, wherein:

the liquid water amount adjustment unit includes a temperature adjustment unit configured to adjust a dew point of an anode side flow path and a dew point of a cathode side flow path; and

12 . The activation device according to claim 11 , wherein:

the temperature adjustment unit includes a humidification state acquisition unit configured to acquire an index in relation to a state of humidification of the membrane electrode assembly; and

13 . The activation device according to claim 11 , wherein the anode side flow path is formed in the first jig, the cathode side flow path is formed in the second jig, and the membrane electrode assembly is sandwiched alone between the first jig and the second jig.