Device and method for high-precision testing of thickness of membrane electrode assembly
A membrane electrode assembly, high-precision technology, applied in measurement devices, instruments, etc., can solve problems such as pressure control can not meet requirements, reduce measurement speed, damage MEA and other problems, achieve automatic recording, improve accuracy, and uniform pressure.
Pending Publication Date: 2020-07-10
上海亿氢科技有限公司
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Problems solved by technology
However, there are certain limitations in this traditional method, the main disadvantages are: (1) the pressure control cannot meet the requirements
Because the area of the probe is large, if the parallelism is not good, the error will increase and even damage the MEA
Therefore, it is necessary to calibrate the parallelism before each measurement, which brings troubles to the operation, has higher requirements on the operators, and reduces the measurement speed
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[0023] Below in conjunction with accompanying drawing, the present invention will be further described as follows:
[0024] as attached figure 1 As shown, the present invention provides a high-precision device and method for testing the thickness of a membrane electrode assembly, including an upper end head 1, a lower end head 2, a pressure sensor 3, a displacement sensor 4, a table 5, a cylinder 6, a guide rod 7, and a solenoid valve 8. The control circuit board 9, the lower end 2 is embedded in the table 5 but not in contact with the table 5, the upper surface of the lower end 2 and the upper surface of the table 5 are located on the same horizontal plane, and the upper surface of the lower end 2 is used as a membrane electrode On the lower contact surface of the component, a pressure sensor 3 is arranged under the lower end head 2, the lower surface of the lower end head 2 is fixed on the pressure sensor 3, the pressure sensor 3 is fixed on the base 10, and the upper end he...
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The invention relates to a device and a method for high-precision testing of the thickness of a membrane electrode assembly. The device comprises an upper end, a lower end, a pressure sensor, a displacement sensor, an air cylinder and the like, the lower end head is embedded in the table board and is not in contact with the table board; the upper surface of the lower end head is used as a lower contact surface with the membrane electrode assembly; the lower surface of the lower end head is fixed on the pressure sensor; the upper end head is connected with a displacement sensor; a probe of thedisplacement sensor is in contact connection with the upper surface of the upper end; a feeler lever of the displacement sensor is fixed to the base through a support, the upper end of the upper end is connected with a guide rod, the other end of the guide rod is connected with the piston end of an air cylinder, an air inlet and an air outlet of the air cylinder are connected with an electromagnetic valve, the circuit control end of the electromagnetic valve is connected with a control circuit board, and the control circuit board is electrically connected with the pressure sensor and the displacement sensor; the device is high in measurement precision and high in measurement speed, the control precision and consistency of the pressure are greatly improved, and errors caused by the pressureare reduced.
Description
[technical field] [0001] The invention belongs to the field of hydrogen fuel cells, in particular to a device and method for measuring the thickness of a membrane electrode assembly with high precision. [Background technique] [0002] The membrane electrode assembly (MEA) is the core component of the electrochemical reaction of the fuel cell. It consists of a proton exchange membrane, a catalyst layer, a diffusion layer and a frame, and is the core component of the fuel cell. The thickness of the MEA is an important parameter, and different thicknesses will change the volume and pressure of the stack, thereby affecting the assembly effect. More importantly, it will also have a certain degree of elasticity. After assembly, it will affect the smoothness of the cathode and anode flow channels, and will also affect the contact resistance with the plate. [0003] At present, the traditional method of measuring thin films is mainly used to detect the thickness of MEA. However, t...
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IPC IPC(8): G01B21/08
CPCG01B21/08
Inventor 王天喜刘亚伟司永成
Owner 上海亿氢科技有限公司