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Fuel cell system and method for controlling fuel cell system

A fuel cell system and fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as increased pressure loss

Pending Publication Date: 2022-04-15
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if a plurality of fuel cell stacks are connected in parallel to the air supply path for supplying cathode gas, compared to the case where a plurality of fuel cell stacks are connected in series to the air supply path for supplying cathode gas , the pressure loss becomes larger

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0015] figure 1 It is a schematic configuration diagram showing the main configuration of the fuel cell system 100 of the first embodiment.

[0016] The fuel cell system 100 is for supplying fuel gas (anode gas) and oxidant gas (cathode gas) required for power generation to a plurality of fuel cell stacks 11, 12, 13, and for driving the fuel cell stacks 11, 12, 13 according to the A system that generates electricity from electric loads such as electric motors.

[0017] The fuel cell system 100 includes a plurality of fuel cell stacks 11 , 12 , and 13 , a fuel supply path 2 , an air supply path 3 , an exhaust path 4 , a connection path 5 , and a branch path 6 . The fuel supply path 2 is used to supply the anode gas to the fuel cell stacks 11 , 12 , 13 , and the air supply path 3 is used to supply the cathode gas to the fuel cell stacks 11 , 12 , 13 . The exhaust passage 4 is used to exhaust the anode off-gas and cathode off-gas exhausted from the fuel cell stacks 11 , 12 , an...

no. 2 approach

[0062] refer to Figure 3 ~ Figure 5 The fuel cell system 100 of the second embodiment will be described. In addition, the same code|symbol is attached|subjected to the same element as 1st Embodiment, and the description is abbreviate|omitted.

[0063] This embodiment is different from the first embodiment in that it includes a bypass passage 8 branched from the connecting passage 5 and connected to the air supply in such a manner that the air heat exchanger 32 is bypassed. The position on the upstream side of the fuel cell stacks 11 , 12 , 13 in the path 3 .

[0064] image 3 It is a schematic configuration diagram showing the main configuration of the fuel cell system 100 of the second embodiment.

[0065] Such as image 3 As shown, the bypass passage 8 is branched from a position downstream of the control valve 50 in the connecting passage 5 .

[0066] The bypass passage 8 branches from a position downstream of the control valve 50 in the connection path 5 , and is con...

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PUM

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Abstract

Provided is a fuel cell system in which the temperature of a fuel cell is increased by supplying heated air at the time of startup. This fuel cell system is provided with: a plurality of fuel cells; a fuel supply path to which the plurality of fuel cells are connected in parallel, the fuel supply path for supplying fuel to the fuel cells; an air supply path to which the plurality of fuel cells are connected in series, the air supply path for supplying air to the fuel cells; a heat exchanger that is provided in the fuel supply path and heats fuel or air; an air heat exchanger that is provided in the air supply path and heats air; and a connection path that connects a position on the upstream side of the air heat exchanger in the air supply path and a position on the upstream side of the heat exchanger in the fuel supply path. A first control valve for adjusting the amount of air flowing into the air heat exchanger is provided in the air supply path, and a second control valve for adjusting the amount of air flowing into the heat exchanger is provided in the connection path. By adjusting the opening degree of the first control valve and the second control valve, heated air is supplied to the plurality of fuel cells from both the air supply path and the fuel supply path.

Description

technical field [0001] The invention relates to a fuel cell system and a control method for the fuel cell system. Background technique [0002] In a fuel cell system composed of a plurality of stacks, if a plurality of fuel cell stacks are connected in series to a fuel supply path for supplying anode gas, the anode exhaust gas of the fuel cell stack on the upstream side is supplied to the fuel cell on the downstream side. battery stack. Contains H in the anode exhaust of the fuel cell stack 2 O, etc. Therefore, when the anode exhaust gas of the fuel cell stack on the upstream side is supplied to the fuel cell stack on the downstream side, power generation may be affected. Therefore, it is preferable that a plurality of fuel cell stacks be connected in parallel to the fuel supply path so as not to be affected by the anode exhaust gas of the upstream fuel cell stack. On the other hand, if a plurality of fuel cell stacks are connected in parallel to the air supply path for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/12H01M8/249
CPCH01M8/249Y02E60/50H01M8/04014H01M8/0618H01M2008/1293H01M8/04022H01M8/04089H01M8/04225H01M8/04268H01M8/04302H01M8/04365H01M8/04731H01M8/04776H01M8/04753H01M8/04067H01M8/04029H01M8/04768H01M8/0432H01M8/04007H01M8/04
Inventor 健·布莱恩·池口筑后隼人
Owner NISSAN MOTOR CO LTD