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Cold starting device and method of graphite bipolar plate fuel cell

A technology of fuel cells and fuel cell stacks, which is applied in the direction of fuel cells, fuel cell groups, power system fuel cells, etc., can solve the problems of microwave-assisted graphite bipolar plate fuel cell cold start, etc., and reduce the realization cost Effect

Pending Publication Date: 2020-12-15
武汉长海电力推进和化学电源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] So far, there are no reports on microwave-assisted graphite bipolar plate fuel cell cold start

Method used

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  • Cold starting device and method of graphite bipolar plate fuel cell

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Embodiment 1

[0030] Such as figure 1 As shown, the cold start device of a graphite bipolar plate fuel cell disclosed in the present invention includes a fuel cell system controller 2 connected to the fuel cell stack 8, and also includes a microwave auxiliary device connected to the fuel cell system controller 2 , the microwave auxiliary device is composed of a transformer 3, a diode 4, a magnetron 6 and a waveguide 7, and the magnetron 6 is composed of a magnetron body and a magnetron that generates microwave pulses (pulse high-voltage signals) Composed of drive coils, the magnetron drive coil is used to generate the microwave pulses required to drive the magnetron, the microwave pulse drives the magnetron to generate microwave pulses of a specific frequency, the diode 4 and the magnetron 6 are connected There is a capacitor 5 to prevent the microwave pulse from being transmitted back to the microwave auxiliary device. The microwave auxiliary device is also connected to an external power s...

Embodiment 2

[0034] A cold-start method for a graphite bipolar plate fuel cell disclosed by the invention comprises the following steps:

[0035]The fuel cell stack 8 starts the state self-check after receiving the startup signal. When it detects that the temperature of the stack 8 is lower than -5°C, the fuel cell system controller 2 judges and executes the low-temperature startup process; The temperature distribution of the stack 8 is uneven, and the fuel cell system controller 2 controls the cooling water pump in the auxiliary equipment of the system to start at a low speed, so that the stack cooling water flows through the fuel cell stack 8 at a low speed; the magnetron in the microwave auxiliary device 6 Receive the electric energy from the on-board power supply 1 and the control signal from the fuel cell system controller 2, and the controller 2 controls the on-board power supply 1 to output the electric energy with an appropriate power, which is converted to the magnetron 6 through t...

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Abstract

The invention discloses a cold starting device of a graphite bipolar plate fuel cell, which comprises a fuel cell system controller connected with a fuel cell stack and a microwave auxiliary device connected with the fuel cell system controller, and the microwave auxiliary device is composed of a transformer, a diode, a magnetron and a waveguide tube. The magnetron is composed of a magnetron bodyand a magnetron driving coil for generating microwave pulses required for driving the magnetron body, a capacitor for preventing the microwave pulses from being conducted back to the microwave auxiliary device is connected between the diode and the magnetron, and the microwave auxiliary device is further connected with an external power supply. According to the invention, the problem of low-temperature starting of the graphite stack fuel cell is solved from the perspective of internal heating of the stack, only the stack body material is heated by microwave heating, and the device and the method have the advantages of low energy consumption and short heating time, and have a wide application prospect.

Description

technical field [0001] The invention belongs to the field of fuel cells, and more specifically relates to a cold start device and method for graphite bipolar plate fuel cells. Background technique [0002] A fuel cell is a device that directly converts chemical energy in fuel into electrical energy. Proton exchange membrane fuel cell is the most widely used one, and is widely used in automobiles, mobile power stations and other fields. In the fuel cell work project, hydrogen and air are respectively fed into the anode and cathode sides of the graphite bipolar plate of the fuel cell, and an electrochemical reaction occurs on the membrane electrode to generate electrical energy and output, and at the same time, it is passed into the cooling water belt of the stack Take away the heat generated by the reaction. At present, fuel cell engines still have problems such as difficulty in low-temperature cold start. It is difficult to start or fail to start in a low-temperature enviro...

Claims

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Application Information

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IPC IPC(8): H01M8/04225H01M8/04223H01M8/04029H01M8/04302H01M8/0432H01M8/04701H01M8/24H05B6/64H05B6/80
CPCH01M8/04268H01M8/04225H01M8/04302H01M8/04365H01M8/04731H01M8/04029H01M8/24H05B6/645H05B6/80H01M2250/20Y02E60/50
Inventor 何书默潘建欣张奥杨军刘剑剑
Owner 武汉长海电力推进和化学电源有限公司
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