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Low-temperature starting device and method for fuel cell system

A fuel cell system and starting device technology, which is applied to fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of low temperature starting of fuel cells, reduced battery efficiency, and impact on fuel cell performance and fuel cell life. , to avoid the performance damage of the fuel cell, easy operation and simple structure.

Active Publication Date: 2020-05-19
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a fuel cell system low-temperature start-up device and method in order to overcome the above-mentioned defects in the prior art. Restricted start-up, and the heating resistor used for low-temperature start-up will reduce the battery efficiency due to the normal load connected to the fuel cell, or a high potential will be generated due to cutting off the heating resistor in the normal load line connected to the fuel cell, which will affect the performance of the fuel cell and The problem with fuel cell life

Method used

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  • Low-temperature starting device and method for fuel cell system
  • Low-temperature starting device and method for fuel cell system
  • Low-temperature starting device and method for fuel cell system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 The low-temperature starting device for a fuel cell system shown includes an electronic switch 9, a fuel cell system DCDC controller 11, and an anode end plate 1, an anode insulation plate 3, an anode heating resistor 5, an anode current collector plate 7, Fuel cell stack 10, cathode current collecting plate 8, cathode heating resistor 6, cathode insulating plate 4, cathode end plate 2, fuel cell system DCDC controller; and anode heating resistor 5, anode current collecting plate 7, fuel cell stack 10. Cathode current collector 8, cathode heating resistor 6 and electronic switch 9 constitute a heating circuit; anode current collector 7, fuel cell stack 10, cathode current collector 8 and fuel cell system DCDC controller 11 constitute a control circuit;

[0048] Wherein, the resistance values ​​of the anode heating resistor 5 and the cathode heating resistor 6 are both 0.01Ω, the thickness of the anode and cathode insulation plates is 4 mm, and the fuel ...

Embodiment 2

[0050] A method for starting a fuel cell system at low temperature based on the device in Embodiment 1, comprising the following steps:

[0051] 1) The fuel cell system receives the start signal, detects that the external environment temperature is -30°C, starts the cold start procedure, and closes the electronic switch 9 to connect to the heating circuit;

[0052] 2) The output current of the fuel cell stack 10 is set to 100A by the fuel cell system DCDC controller 11, the anode heating resistor 5 and the cathode heating resistor 6 generate heat under the action of the output voltage of the fuel cell stack 10, and heat the anode end plate 1 1. The cathode end plate 2 and the single-chip battery on the cathode and anode sides of the fuel cell stack 10 are heated with a heating power of 100W until the air temperature at the cathode outlet of the fuel cell stack 10 reaches -20°C;

[0053] 3) The output current of the fuel cell stack 10 is set to 150A through the DCDC controller ...

Embodiment 3

[0058] In the low-temperature start-up device of the fuel cell system in this embodiment, the resistance values ​​of the anode heating resistor 5 and the cathode heating resistor 6 are both 0.005Ω, the thickness of the anode and cathode insulating plates are both 1 mm, and the fuel cell stack 10 includes 100 single cells. All the other are with embodiment 1.

[0059] A method for starting a fuel cell system at low temperature based on the above device, comprising the following steps:

[0060] 1) Close the electronic switch 9 to communicate with the heating circuit;

[0061] 2) Set the cycle temperature threshold, the end point temperature threshold and the output current, so that the anode heating resistor 5 and the cathode heating resistor 6 heat the monolithic cells on the cathode and anode sides of the fuel cell stack 10 until the outlet temperature of the oxidant reaches the cycle temperature threshold;

[0062] 3) Determine whether the outlet temperature of the oxidant h...

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Abstract

The invention relates to a low-temperature starting device and method for a fuel cell system. The device comprises a fuel cell stack, an electronic switch, a DCDC controller, an anode heating resistorand a cathode heating resistor, wherein the fuel cell stack and the DCDC controller are electrically connected to form a control loop; and the electronic switch, the anode heating resistor, the fuelcell stack and the cathode heating resistor are electrically connected to form a heating loop. The method comprises the following steps: closing the electronic switch to connect the heating loop, so that the heating resistor generates heat under the current action of the fuel cell stack to heat the single cells on the cathode and anode sides of the fuel cell stack. Compared with the prior art, thedevice is simple in structure and convenient to operate, the two ends of the fuel cell can be heated only by controlling the heating loop and the control loop, the improvement process has little influence on the fuel cell stack, the heating resistor can stop working by cutting off the heating loop, the temperature of single pieces at the two ends is not affected, high voltage is avoided, and theefficiency and service life of the fuel cell are not affected.

Description

technical field [0001] The invention belongs to the technical field of fuel cell systems, and relates to a low-temperature starting device and method for a fuel cell system. Background technique [0002] A proton exchange membrane fuel cell (PEMFC), also called a polyelectrolyte fuel cell (PEFC), is a device that directly converts the chemical energy of a reducing agent and an oxidizing agent into electrical energy. Because of its high efficiency, cleanliness and other characteristics, fuel cells have received more and more attention. [0003] When the fuel cell temperature is below zero and starts, since the product of the fuel cell is water, the generated water will freeze inside the fuel cell. Freezing inside the fuel cell prevents reactant gases from reaching the catalyst surface. Before the ice completely blocks the inside of the fuel cell, if the temperature of the fuel cell does not rise above zero, it will cause low-temperature start-up failure. At the same time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04007H01M8/04223H01M8/04225H01M8/04302H01M8/04701H01M8/2465
CPCH01M8/04037H01M8/04067H01M8/04268H01M8/04701H01M8/2465H01M8/04225H01M8/04302Y02E60/50
Inventor 徐鑫甘全全王永湛戴威
Owner SHANGHAI SHENLI TECH CO LTD
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