Monocell test fixture with temperature partition setting and test method thereof

A technology of temperature partition and test fixture, applied in the direction of measuring electricity, measuring device, measuring electrical variables, etc., can solve the problems such as solving the influence of fixture temperature, difficult to repeat specific tests, complex operating conditions of the stack, etc. The experimental cost is small, the change is convenient, and the effect of improving the performance of the stack

Pending Publication Date: 2022-08-09
大连锐格新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when the existing method is used to detect the single battery test, the temperature and current partition detection technology usually does not consider the above-mentioned influence of the fixture on the temperature, and the temperature control of the fixture is often designed and manufactured according to a uniform consideration.
Tests under certain conditions, especially due to low voltage and high current, require a relatively large thickness of the current collector plate, and the plate is usually made of metal copper, which has good thermal conductivity and large heat capacity. The temperature at the location of the reaction is more uniform than the temperature of the actual reaction heat generation area, resulting in that there may be a large difference between the actual operating conditions and the apparent test conditions
[0009] When testing at the scale of the stack, the thickness of the insert plate is different from the conventional plate at least at the manifold position, so heat transfer cooling and single cell stack gas conditions may cause different conditions due to interference. Due to the complex operating conditions of the stack, Difficult to repeat specific tests, passive detection

Method used

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  • Monocell test fixture with temperature partition setting and test method thereof
  • Monocell test fixture with temperature partition setting and test method thereof
  • Monocell test fixture with temperature partition setting and test method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] see Figure 1 to Figure 4 ,in figure 1 , Figure 4 It is a schematic diagram of the basic structure of the present invention. The fixture generally uses a press or a bolt to encapsulate the single cell structure, which is a conventionally known technology, and the encapsulation is not described in detail in the figure. Coolant flow control and temperature detection at the inlet and outlet are not shown in the attached drawings for simplicity of illustration.

[0040] The single cell 1 to be tested is located in a fixture 2, which is a set of conventional devices for fixing the single cell 1 and its partition detector 11, which is located between the single cell 1 and the cooler 7, and is located in the single cell 1. Both sides or one side of the detector 11 , that is, the partition detector 11 can be arranged on one side or both sides at the same time.

[0041] The cooler 7 is a rectangular heat-conducting metal shell, and there are two quick-plugs 8 of the cooler'...

Embodiment 2

[0047] The present invention can choose between the coolers 7 in series or individually controlled.

[0048] When using independent control, the temperature difference between each inlet and outlet should be within 1°C, preferably within 0.5°C, and more preferably within 0.2°C, that is, the actual measure is to stabilize the inlet temperature and increase the flow in parallel to establish a temperature difference in the area where the cooler is located. Temperature stability and repeatability.

[0049] When a series connection is used, it is preferable to simulate the cooling liquid flow pattern of the specific application, eg, co-current or counter-current with hydrogen, or serpentine series connection, and the outflow temperature simulates the cooling liquid outlet temperature of the application. This method can reduce the quantity of temperature control fluid of the cooling liquid temperature control device, and can reduce the investment cost of peripheral fluid temperature...

Embodiment 3

[0052] see Figure 5 , the parallel flow cooling structure in the short direction of the pole plate, showing the top view structure of the upper related connection of the one-sided clamp.

[0053] The cooler 7 sandwiched between the single cell 1 and the clamp 2 has the same inflow coolant conditions, ie the same temperature, unidirectional parallel cooling flow, resulting in simulated operating conditions with such a cooling layout. A similar fluid layout can be simulated, with coolant communicating on opposite sides of the long sides of the cell, perpendicular to the fuel and oxidant flow fields.

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Abstract

The invention belongs to the technical field of fuel cell test, discloses a single cell test fixture with temperature partition setting and a test method thereof, and aims to test a single cell according to the actual characteristic of non-uniform actual temperature distribution on the surface of a single cell in a galvanic pile. Temperature zoning conditions are provided for a conventional zoning test board to measure data such as current, resistance, air pressure, humidity and the like of each monitoring zone. The detection subarea and the temperature control subarea can be the same or different. The invention provides deeper technical support for the development of fuel cells.

Description

technical field [0001] The invention belongs to the technical field of fuel cell testing, and in particular relates to a single cell fixture with an actively controlled temperature zone setting and a testing method thereof. Background technique [0002] Hydrogen proton exchange membrane fuel cells are formed by stacking multiple single cells. The head and tail single cells are connected to the current collector plate, the insulating plate, and the end plate, and are connected into a stack by fixing objects such as screws or cable ties between the two end plates. [0003] In a specific stable operating condition, the total current of each single cell is the same, but the single cell voltage at different positions is different, and the efficiency and temperature distribution of each plate are different. [0004] For different single cells, the position of the stack affects the average temperature of the single plate, especially because the first plate and the tail plate are on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04G01R31/36G01R31/374G01R31/378G01R31/00
CPCG01R1/04G01R31/36G01R31/374G01R31/378G01R31/003Y02E60/10Y02E60/50
Inventor 高鹏盛武林
Owner 大连锐格新能源科技有限公司
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