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Fuel cell system

A fuel cell system and fuel technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve the problems of battery stack temperature rise and difficulty in maintaining rated output

Inactive Publication Date: 2013-09-11
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a fuel cell system, when the battery stack deteriorates and it becomes difficult to maintain the rated output, there is a problem that the temperature of the battery stack rises due to a large overvoltage

Method used

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Embodiment Construction

[0018] Preferred embodiments of the fuel cell system of the present invention will be described in detail below with reference to the drawings. In addition, the same code|symbol is attached|subjected to the same or corresponding part in each figure, and repeated description is abbreviate|omitted.

[0019] Such as figure 1 As shown, the fuel cell system 1 includes a desulfurization unit 2, a water vaporization unit 3, a hydrogen generation unit 4, a battery stack 5, an exhaust gas combustion unit 6, a hydrogen-containing fuel supply unit 7, a water supply unit 8, an oxidant supply unit 9, a power conditioning device 10 and control unit 11. The fuel cell system 1 generates electricity in the cell stack 5 using fuel containing hydrogen and an oxidant. The type of the cell stack 5 in the fuel cell system 1 is not particularly limited, for example, a solid polymer fuel cell (PEFC: Polymer Electrolyte Fuel Cell), a solid oxide fuel cell (SOFC: Solid Oxide Fuel Cell), a phosphoric...

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Abstract

This fuel cell system (1) acquires fluctuations in voltage from a cell stack (5) with respect to fluctuations in fuel utilization rate, and detects deterioration in the cell stack (5) by comparing the voltage values with reference values. Then, if a deterioration in the cell stack (5) is acknowledged, the rated power of the system is reduced, thus achieving operation commensurate with the degree of deterioration of the cell stack (5).

Description

technical field [0001] The invention relates to a fuel cell system. Background technique [0002] Conventionally, there is known a fuel cell system including: a hydrogen generating unit that generates a hydrogen-containing gas using a hydrogen-containing fuel; and a cell stack that generates electricity using the hydrogen-containing gas. In such a fuel cell system, when the battery stack deteriorates and it becomes difficult to maintain a rated output, there is a problem that the temperature of the battery stack rises due to a large overvoltage. [0003] In response to such a problem, for example, in the fuel cell system described in Patent Document 1, current-to-fuel utilization rate data (Japanese: current-to-fuel utilization rate data) and the current-to-fuel utilization rate data during the temperature rise period from power 0 to rated output are prepared. Current vs. fuel utilization data during temperature drop from rated output to zero. Furthermore, the fuel gas sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04
CPCH01M8/04559H01M8/0488H01M8/086H01M2008/1095H01M2008/1293H01M2008/147Y02E60/50H01M8/04089
Inventor 水野环树佐藤康司
Owner JX NIPPON OIL & ENERGY CORP