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Fuel cell system, fuel cell operation method, program, and recording medium

A fuel cell system and fuel cell technology, applied in the fields of fuel cells, fuel cell additives, fuel cell control, etc., can solve the problems of high reliability, high cost, unrealistic and other problems of fuel cells

Inactive Publication Date: 2005-02-09
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this requires an impedance measuring device for the number of battery cells 31, 32, ..., 3m, which is unrealistic due to a significant increase in cost.
[0022] As a result, there is a problem that it is impossible to take reliable measures for the cause of abnormal power generation of the fuel cell.

Method used

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  • Fuel cell system, fuel cell operation method, program, and recording medium
  • Fuel cell system, fuel cell operation method, program, and recording medium
  • Fuel cell system, fuel cell operation method, program, and recording medium

Examples

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Embodiment approach 1

[0160] First, mainly refer to the configuration diagram of the fuel cell power generation system according to Embodiment 1 of the present invention. figure 1 , the configuration of the fuel cell power generation system according to this embodiment will be described.

[0161] The fuel cell power generation system of this embodiment is a fuel cell power generation system that supplies an oxygen-containing oxidant to a cathode and supplies a hydrogen-containing fuel gas to an anode to generate power.

[0162] In addition, the fuel cell power generation system of the present embodiment includes: an AC signal generation unit 503 for varying the load current of the fuel cell unit 501; a voltage measurement unit 504 for measuring the voltage response of the fuel cell unit 501; The impedance of the fuel cell unit 501 is measured by the phase difference between the load current and the voltage response, and the operating conditions are changed according to the impedance value.

[016...

Embodiment approach 2

[0294] First, mainly refer to the configuration diagram of the fuel cell power generation system according to Embodiment 2 of the present invention. Figure 13 , the configuration of the fuel cell power generation system according to this embodiment will be described.

[0295] The configuration of the fuel cell power generation system in this embodiment is similar to the configuration of the fuel cell power generation system in Embodiment 1 described above. Therefore, differences between the two will be mainly described below (the same applies to Embodiment 3).

[0296] The fuel cell power generation system of the present embodiment is a fuel cell power generation system that supplies an oxidant containing oxygen to a cathode and a fuel containing hydrogen to an anode to generate power.

[0297] In addition, the fuel cell power generation system according to this embodiment includes: a load control unit 603 that changes the load current of the fuel cell unit 601 in a stepwise ...

Embodiment approach 3

[0319] First, mainly refer to the configuration diagram of the fuel cell power generation system according to Embodiment 3 of the present invention. Figure 14 , the configuration of the fuel cell power generation system according to this embodiment will be described.

[0320] The fuel cell power generation system of the present embodiment is a system including a fuel cell stack 702 in which a plurality of fuel cell units 701 are connected in series to generate electricity by supplying an oxidant containing oxygen to the cathode and a fuel gas containing hydrogen to the anode.

[0321] The fuel cell power generation system of this embodiment includes: a load control unit 704 that changes a common load 703 in each fuel cell unit 701; a voltage measurement unit 705 that can measure the voltage of each fuel cell unit 701; and an impedance measurement unit 707 measures The impedance of each fuel cell unit 701, and the operating conditions are changed according to the impedance val...

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Abstract

There have been sufficient highly reliable responses appropriate to the causes of power generation abnormalities in fuel cells that generate power by supplying an oxidizing agent containing oxygen to the cathode and by supplying a fuel gas containing hydrogen to the anode. In order to overcome this problem the invention provides for a fuel cell power generation system equipped with a means that includes AC signal generation block 503 and load 502 that varies the load current for fuel cell 501, which operates to generate power; voltage measurement block 504 that measures the voltage response to the load current variation; impedance measurement block 505 that computes the impedance of fuel cell 501, based on the results of the measurement of the voltage response; and fuel cell control block 506 that varies the operating conditions of fuel cell 501, by utilizing the impedance computation results.

Description

technical field [0001] The present invention relates to, for example, a fuel cell system, a fuel cell operating method, a program, and a recording medium for controlling occurrence of abnormal power generation of a polymer electrolyte fuel cell. Background technique [0002] A fuel cell is a fuel cell unit composed of a pair of cathodes and anodes, or a fuel cell unit in which multiple fuel cell units are connected in series. composed of battery packs. [0003] Generally, abnormal power generation of the fuel cell is detected by monitoring the voltage of the fuel cell unit, but it is difficult to determine the cause of the abnormal power generation by this method. [0004] More specifically, it is impossible to determine whether the cause of the voltage drop of the fuel cell is an increase in diffusion resistance due to gas diffusion being blocked, or an increase in reaction resistance due to a decrease in the reactivity of the electrodes. [0005] As a technique for deter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36H01M8/00H01M8/04
CPCH01M8/04305G01R31/3651G01R31/3662H01M8/04223Y02E60/50H01M8/04231H01M8/04298G01R31/367G01R31/389H01M8/04303H01M8/04228H01M8/04H01M8/04225
Inventor 武部安男寺西正俊中川贵嗣内田诚濑川彰继
Owner PANASONIC CORP