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Fuel cell system

A fuel cell system and fuel cell technology, applied in the direction of fuel cells, fuel cell additives, fuel cell control, etc., can solve problems such as hindering the supply of anode waste gas and reducing the power generation performance of fuel cell groups, and achieve the effect of reducing manufacturing costs

Pending Publication Date: 2019-11-26
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stagnation of water in the circulation system hinders the supply of the anode off-gas to the anode, which causes a decrease in the power generation performance of the fuel cell stack

Method used

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  • Fuel cell system
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0092] (Configuration of fuel cell system)

[0093] refer to figure 1 The fuel cell system 100 according to Embodiment 1 will be described. figure 1 It is a block diagram schematically showing an example of the main configuration of the fuel cell system 100 according to Embodiment 1 of the present disclosure. The fuel cell system 100 according to Embodiment 1 of the present disclosure has a so-called circulation system configuration in which the anode off-gas discharged from the anode of the fuel cell 1 is returned to the anode of the fuel cell 1 again for circulation.

[0094] Such as figure 1 As shown, the fuel cell system 100 includes a fuel cell 1 , a fuel gas supply path 2 , a circulating gas path 3 , a water reservoir 4 , a first discharge path 5 (discharge path), a valve 6 and a controller 20 .

[0095] The fuel cell 1 is a device for generating electricity by electrochemically reacting hydrogen in a fuel gas and oxygen in an oxidant gas. The fuel cell 1 includes a ...

Embodiment approach 2

[0219] refer to Figure 18 The fuel cell system 100 according to Embodiment 2 will be described. Figure 18 It is a block diagram showing an example of the main configuration of the fuel cell system 100 according to Embodiment 2 of the present disclosure.

[0220] The fuel cell system 100 related to Embodiment 2 is, for example, Figure 18 As shown, it differs from the fuel cell system 100 according to Embodiment 1 in that it further includes a second exhaust path 7 branching from the circulating gas path 3 , but other than that, the configuration is the same. Description of the same configuration as that of the fuel cell system 100 according to Embodiment 1 will be omitted.

[0221] That is, the fuel cell system 100 according to the second embodiment is compared with the fuel cell system 100 according to the first embodiment, as Figure 18 As shown, a second discharge path 7 branched from the circulating gas path 3 and connected to the water reservoir 4 is further provided...

Embodiment approach 3

[0225] In the fuel cell system 100 according to Embodiment 3, the first discharge path 5 is configured to discharge the condensed water and the anode off-gas in the water reservoir 4, and other configurations are the same as figure 1 The fuel cell system 100 according to Embodiment 1 shown is the same. Furthermore, the fuel cell system 100 according to Embodiment 3 has the following Figure 19 The flow shown carries out the discharge of condensate water and anode exhaust gas.

[0226] (operation method)

[0227] Figure 19 It is a flowchart showing an example of an operating method of the fuel cell system 100 according to the third embodiment. Furthermore, Figure 19 Step S201~step S204 among the operation method shown is with figure 2 Step S11 to step S14 of the operation method shown are the same, and therefore description thereof will be omitted.

[0228] When it is determined in step S204 that the opening time of the valve 6 reaches the drainage time (YES in step S2...

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PUM

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Abstract

The invention provides a fuel cell system which can reduce the manufacturing cost. The fuel cell system includes a fuel cell that generates electricity using a fuel gas and an oxidant gas; a fuel gassupply path through which a fuel gas to be supplied to an anode of the fuel cell flows; a recycle gas path through which an anode off-gas emitted from the anode of the fuel cell is returned to the fuel gas supply path; a water reservoir that holds water separated from the anode off-gas flowing through the recycle gas path; a drainage path through which water stored in the water reservoir is drained; a valve provided on the drainage path; and a controller that determines, on the basis of a history of a flow rate of the anode off-gas, a length of time for which the valve continues to be opened for draining the water stored in the water reservoir.

Description

technical field [0001] The present disclosure relates to a fuel cell system including a fuel cell that generates electricity using a fuel gas and an oxidant gas. Background technique [0002] In the fuel cell system, water is produced by the electrochemical reaction of the cathode of the fuel cell stack, that is, the reaction of hydrogen ions passing through the electrolyte membrane from the anode side and oxygen in the oxidant gas. Most of the water generated by the electrochemical reaction is contained in the cathode off-gas discharged from the cathode of the fuel cell stack and released into the atmosphere, but a part of the generated water permeates the electrolyte membrane and moves to the anode. Also, the produced water that has moved to the anode side is included in the anode off-gas and discharged from the anode of the fuel cell stack. [0003] Here, when the fuel cell system is configured to return the anode off-gas to the anode side through the circulation gas pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04089H01M8/04291H01M8/0662
CPCH01M8/04291H01M8/0662H01M8/04097H01M8/04082H01M8/04141H01M8/04164H01M8/04179H01M8/04201H01M8/04343H01M8/04402H01M8/04462H01M8/04514H01M8/04619H01M8/04828Y02P70/50Y02E60/50H01M8/04156H01M8/04604H01M8/04992H01M8/04298
Inventor 森田纯司薄义人伊濑豪彦
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD