Fuel cell system

a fuel cell and system technology, applied in the direction of battery/fuel cell control arrangement, electrochemical generators, transportation and packaging, etc., can solve problems such as failure in power generation, and achieve the effect of good operation

Active Publication Date: 2016-05-12
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is for a fuel cell system that prevents low-temperature cooling water from freezing and damaging the fuel cell. It works by controlling the supply of cooling water from a radiator, ensuring that only the necessary amount of cooling water enters the fuel cell. This prevents the cooling water from flowing into the fuel cell before it has sufficiently risen in temperature, which could lead to damage. The system also removes ions from the cooling water, keeping its electrical conductivity constant and ensuring good insulation. The controller continues the predetermined percentage supply operation for a set period of time, even if the temperature of the cooling water fluctuates. Overall, this fuel cell system prevents damage to the fuel cell and ensures continued good operation.

Problems solved by technology

In the meantime, when the temperature of cooling water in the radiator is below freezing due to low ambient temperature, if the cooling water is circulated, the cooling water in the radiator may flow into the fuel cell to freeze the cooling water in the fuel cell, and this could cause a failure in power generation.

Method used

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Embodiment Construction

[0027]Next, one embodiment of a fuel cell system according to the present invention will be described. In the following, a case where this fuel cell system is applied to an in-vehicle power generation system of a fuel cell vehicle will be described, but the present invention is not limited to such an application example. The present invention is also applicable to all sorts of moving vehicles, such as boats and ships, aircraft, trains, walking robots, etc., and to a stationary power generation system used as a power generating facility for constructions (houses, buildings, etc.).

[0028]FIG. 1 is a schematic configuration diagram of a fuel cell system according to the embodiment.

[0029]As shown in FIG. 1, a fuel cell system 1 according to the embodiment includes a fuel cell 11. The fuel cell 11 is, for example, a solid polymer electrolyte fuel cell having a stack structure in which many cells are stacked. Each of the cells of the fuel cell 11 has an air electrode on one face and a fuel...

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Abstract

A flow control valve 26 can adjust the percentage of the flow rate of cooling water to a radiator 23 to a predetermined value (50%) or smaller. When the temperature of the cooling water in a fuel cell 11 is determined to be a predetermined temperature (0° C.) or higher after the cooling water is supplied to the fuel cell 11 with the percentage of the flow rate of the cooling water to the radiator 23 set to the predetermined value (50%) or larger, a controller 41 performs a predetermined percentage supply operation for controlling the flow control valve 26 and a pump 22 to supply the cooling water to the fuel cell 11 with the percentage of the flow rate of the cooling water to the radiator 23 set to the predetermined value (50%) or larger.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a fuel cell system.[0003]2. Background Art[0004]As a system including a fuel cell, there is known a system in which a circulation passage provided with a radiator is connected to a fuel cell to circulate cooling water through the circulation passage and pump the cooling water into the fuel cell after being cooled by a radiator (see Patent Document 1).CITATION LISTPatent Document[0005][Patent Document 1] JP 2010-186599 ASUMMARY OF THE INVENTION[0006]In the meantime, when the temperature of cooling water in the radiator is below freezing due to low ambient temperature, if the cooling water is circulated, the cooling water in the radiator may flow into the fuel cell to freeze the cooling water in the fuel cell, and this could cause a failure in power generation.[0007]The present invention has been made in view of the above circumstances, and it is an object thereof to provide a fuel cell sy...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60L11/18H01M8/04007H01M8/04029
CPCB60L11/1892H01M2250/20H01M8/04074H01M8/04029H01M8/04007B60L58/33H01M8/04044H01M8/04358H01M8/04768Y02E60/50Y02T90/40
Inventor BONO, TETSUYAYAMADA, TAKASHI
Owner TOYOTA JIDOSHA KK
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