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Fuel cell system and control method for fuel cell system

A technology for fuel cell systems and fuel cell stacks, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of cathode gas temperature rise, low efficiency, and inability to increase the temperature of the battery stack

Inactive Publication Date: 2020-07-24
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if the back pressure is increased, the amount of cathode gas supplied to the cathode side increases, and the cathode gas accumulates, making it impossible to perform low-efficiency operation and increase the temperature of the battery pack.
Therefore, it is difficult to increase the temperature of the cathode gas by increasing the back pressure.

Method used

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  • Fuel cell system and control method for fuel cell system
  • Fuel cell system and control method for fuel cell system
  • Fuel cell system and control method for fuel cell system

Examples

Experimental program
Comparison scheme
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no. 1 approach

[0019] First, refer to figure 1 , the fuel cell system 1 of the first embodiment will be described. figure 1 It is an explanatory diagram showing a schematic configuration of the fuel cell system 1 according to the first embodiment. The fuel cell system 1 can be mounted on various mobile bodies such as vehicles, ships, airplanes, and robots, and can also be applied to stationary power sources. Here, a fuel cell system 1 mounted on an automobile will be described as an example. The fuel cell system 1 includes a solid polymer fuel cell 2 . The fuel cell 2 includes a fuel cell stack 3 formed by stacking a plurality of unit cells having a cathode electrode, an anode electrode, and an electrolyte membrane disposed therebetween, and has a cathode flow path 3a and an anode flow path 3a formed therein. Flow path 3b. The electrolyte membrane is, for example, a proton-conductive solid polymer electrolyte membrane. also, figure 1 The illustration of the single cell is omitted in . ...

no. 2 approach

[0037] Next, refer to image 3 , and the second embodiment will be described. There are points of difference between the fuel cell system 101 of the second embodiment and the fuel cell system 1 of the first embodiment which will be described below. The fuel cell system 101 of the second embodiment differs from the fuel cell system 1 of the first embodiment in the branch point of the circulation flow path 81 . And, accompanying this, the setting of the opening degree of the circulation control valve V3 is different from the setting of the operation amount of the compressor K1 when the circulation control valve V3 is opened. also, figure 2 The shown flowchart itself can also be commonly used in the second embodiment.

[0038] The circulation flow path 8 of the first embodiment branches between the compressor K1 and the intercooler 5 . Therefore, in the first embodiment, assuming that the circulation control valve V3 is opened while keeping the operating amount of the compre...

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Abstract

Provided are a fuel cell system and a control method for the fuel cell system. The fuel cell system includes: a fuel cell stack; a refrigerant circulation path for circulating a refrigerant that cools the fuel cell stack; and a cathode gas that is connected to the inlet of the fuel cell stack and provided with a compressor that supplies the cathode gas to the fuel cell stack. Supply flow path: an internal cooler arranged between the outlet of the compressor and the inlet of the fuel cell stack in the cathode gas supply flow path, connected to the refrigerant circulation path, and cooling the cathode gas discharged from the compressor with refrigerant and a pressure regulating valve disposed between the internal cooler and the inlet of the fuel cell stack in the cathode gas supply flow path, when the temperature of the fuel cell stack is required to be raised, the pressure regulating valve makes the outlet of the compressor including the internal cooler to The pressure in the cathode gas supply flow path up to the pressure regulating valve rises independently of the pressure in the cathode flow path formed in the fuel cell stack on the downstream side of the pressure regulating valve.

Description

technical field [0001] The invention relates to a fuel cell system and a control method for the fuel cell system. Background technique [0002] There is known a fuel cell system in which a refrigerant for cooling a fuel cell stack is introduced into an intercooler disposed downstream of a compressor for supplying cathode gas (oxidizing gas) under pressure, and the cathode gas passing through the intercooler is cooled. Cooling is performed (for example, refer to Patent Document 1). A fuel cell system equipped with an internal cooler is also disclosed in Patent Document 2, for example. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2010-277747 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2008-277075 [0005] However, when starting the fuel cell system at a low temperature, etc., the fuel cell stack may be required to rapidly rise in temperature. Here, focusing on the fact that the cathode gas compressed and heated by the compressor flows through the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04225H01M8/04089H01M8/04029H01M8/04119H01M8/04014H01M8/04302H01M8/04701H01M8/04746H01M8/10
CPCH01M8/04H01M8/04701H01M8/04746H01M8/04302H01M8/04014H01M8/04029H01M8/04097H01M8/04201H01M8/04268H01M8/04335H01M8/04358H01M8/04395H01M8/04753H01M2008/1095H01M8/04225Y02E60/50
Inventor 梅花丰一
Owner TOYOTA JIDOSHA KK