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Fuel cell system

A fuel cell system and fuel cell technology, applied in the direction of fuel cells, fuel cell integration, fuel cell additives, etc., can solve problems such as damage to fuel cells, and achieve the effects of avoiding degradation and reducing voltage changes

Inactive Publication Date: 2008-11-26
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When reducing the load on the air compressor of the air supply source or greatly reducing the supply of combustible gas flow to improve the efficiency of the fuel cell system, it reduces or reverses the battery voltage and in some cases damages the fuel cell

Method used

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Embodiment approach 1

[0054] A fuel cell system according to Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 4 . FIG. 1 is a diagram showing the configuration of a fuel cell system according to Embodiment 1 of the present invention. As shown in FIG. 1 , the fuel cell system according to Embodiment 1 of the present invention has: a fuel cell stack 100 having a plurality of fuel cells; Integer), used to provide fuel to each fuel cell of the fuel cell stack 100; air supply device 102, used to provide air to each fuel cell of the fuel cell stack; power converter 103, used to control the fuel cell stack 100 Voltage; the secondary battery 104 is used to make up for the power shortage when the power generated by the fuel cell stack 100 is less than the power required by the load device; the voltage measuring device 105 is used to measure the voltage of each fuel cell of the fuel cell stack 100; A current measuring device 106 for measuring the current of the fuel...

Embodiment approach 2

[0091] A fuel cell system according to Embodiment 2 of the present invention will be described below with reference to FIGS. 5 to 9 . 5 is a diagram showing the configuration of a fuel cell system according to Embodiment 2 of the present invention. In FIG. 5, the same reference numerals denote the same components as in FIG. 1, and detailed descriptions about them are omitted. The fuel cell system in Embodiment 2 has: air supply devices 502(1) to 502(n) (n is a positive integer greater than or equal to 2) for supplying air to the fuel cells 110(1) to 110(n), respectively ; and a fuel supply device 501 for uniformly supplying fuel to each fuel cell. The controller 108 has an air supply gauge 801 ( Figure 8 ). The fuel cell system in Embodiment 2 is the same as that of Embodiment 1 except for the configuration described above.

[0092] The fuel cell system according to Embodiment 2 controls the air supply amount to reduce the voltage variation of the fuel cells 110(1) to 110...

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Abstract

There is provided a fuel cell system which reduces voltage variations of a plurality of fuel cells and stabilizes a generated power of a fuel cell stack. A fuel cell system according to the invention includes a fuel cell stack having a plurality of fuel cells connected in series, a fuel supply device, an air supply device and a controller. The controller sets at least one of a fuel supply amount and an air supply amount for each fuel cell based on each voltage of the plurality of fuel cells so that each voltage variation of the plurality of fuel cells may be minimized, and the fuel supply device supplies fuel to each of the fuel cells based on the fuel supply amount of each fuel cell, and / or the air supply device supplies air to each of the fuel cells based on the air supply amount of each fuel cell.

Description

technical field [0001] The present invention relates to a fuel cell system suitable for use as a power source of electronic equipment and the like. Background technique [0002] In recent years, fuel cells capable of continuously supplying power for a long period of time have been reviewed as power sources for electronic devices and the like. A fuel cell typically has a fuel electrode and an air electrode disposed on either side of an electrolytic layer. When hydrogen gas is supplied to the fuel electrode and oxygen gas is supplied to the air electrode, an electrochemical reaction occurs and a DC (direct current) current is generated. Since the electromotive force of a fuel cell, which is a minimum unit for generating electric current, is small, a plurality of fuel cells must be connected in series to provide power required for a device using the fuel cell as a power source. Stronger power is provided when a plurality of fuel cells are stacked to form a fuel cell stack. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04
CPCH01M8/04619H01M8/04007H01M8/1011Y02B90/18H01M8/04365H01M8/04552Y02E60/50H01M16/006H01M8/04589H01M2250/30H01M8/04089H01M8/04873H01M8/0637H01M8/0491H01M8/04753Y02B90/10Y02E60/10
Inventor 高田雅弘高津克巳市濑俊彦
Owner PANASONIC CORP
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