Batch detection tool and method for fuel cell bipolar plate leakage

A fuel cell and batch detection technology, which is applied to fuel cell parts, detects the appearance of fluid at the leakage point, and uses liquid/vacuum to measure the liquid tightness, etc., which can solve the problem of inability to visually determine the leakage on the plate The severity of point leakage, the inability to locate the leakage position of the plate, and the inadvisability of mass production have achieved the effects of shortening the detection cycle, ensuring the one-time pass rate, and improving screening efficiency.

Pending Publication Date: 2021-01-29
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. It is impossible to locate the leakage position on each plate;
[0007] 2. It is impossible to visually determine the severity of the leakage point on each plate
[0008] 3. Detection of the end of the bipolar plate after being assembled into a real stack. This method seriously occupies equipment resources and is very undesirable in terms of mass production.

Method used

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  • Batch detection tool and method for fuel cell bipolar plate leakage
  • Batch detection tool and method for fuel cell bipolar plate leakage
  • Batch detection tool and method for fuel cell bipolar plate leakage

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A batch detection tool for fuel cell bipolar plate leakage, the structure of the bipolar plate is as follows figure 1 As shown, it includes three inlets and three outlets and various fluid channels. The cooling fluid inlet 1, the air inlet 2, the cooling fluid outlet 3 and the air outlet 4 and the cooling fluid inlet 1 and the cooling fluid outlet 3 are used in the detection of this application. Cooling fluid channel, the air flow channel connecting the air inlet 2 and the air outlet 4.

[0033] Such as Figure 2-3 As shown, the tooling includes an upper end plate 8, a lower end plate 12, and a tie rod 13. A plurality of bipolar plates 10 are stacked between the upper end plate 8 and the lower end plate 12, and are fixed by the tie rod 13. Adjacent bipolar plates 10 and The bipolar plate 10 and the upper end plate 8 and the lower end plate 12 are sealed by a seal 11, and the upper end plate 8 and the lower end plate 12 are provided with a fluorescent developer solution...

Embodiment 2

[0043]The water-soluble fluorescent agent used in this embodiment is a commercially available phenylpyrazoline derivative containing 200 ppm.

[0044] There are two bipolar plates 10 stacked between the upper end plate 8 and the lower end plate 12, the temperature of the fluorescent developer solution and the hot air pumped into the tooling are both 40°C, and the fluid pressure in the cooling fluid channel is kept at 100kPa. Flow velocity is 0.4m / s, leaves standstill 7 days, all the other are with embodiment 1.

Embodiment 3

[0046] The water-soluble fluorescent agent used in this example is a commercially available coumarin derivative containing 2000 ppm.

[0047] There are 200 bipolar plates 10 stacked between the upper end plate 8 and the lower end plate 12, the temperature of the fluorescent developer solution and the hot air pumped into the tooling are both 60°C, and the fluid pressure in the cooling fluid channel is maintained at 200kPa, Flow velocity is 1m / s, leaves standstill 1 day, all the other are with embodiment 1.

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Abstract

The invention relates to a batch detection tool and method for fuel cell bipolar plate leakage. The tool comprises an upper end plate (8), a lower end plate (12) and a pull rod (13), a plurality of bipolar plates (10) are stacked between the upper end plate (8) and the lower end plate (12) and are fixed through the pull rod (13), and the adjacent bipolar plates (10) and the bipolar plates (10), the upper end plate (8) and the lower end plate (12) are sealed through sealing pieces (11); the upper end plate (8) and the lower end plate (12) are provided with a fluorescent color developing agent solution inlet (5), a fluorescent color developing agent solution outlet (7), a hot air inlet (6) and a hot air outlet (9). Compared with the prior art, the tool provided by the invention has the advantages that a plurality of stacked polar plates are traced and permeated through a fluorescent agent for a certain period of time, so that the air tightness of the polar plates can be efficiently detected in batches, leakage points and semi-quantitative leakage conditions are accurately positioned, the detection beat is shortened, and the polar plate screening efficiency is greatly improved.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a batch detection tool and method for leakage of bipolar plates of a fuel cell. Background technique [0002] With the maturity of fuel cell technology, as a zero-pollution, high-efficiency power generation device that can directly convert chemical energy into electrical energy, it has been more and more used in communication base stations, vehicle power, distributed power and other fields. [0003] The bipolar plate is one of the core components of the fuel cell, which plays the role of distributing gas, conducting heat and electricity. Due to the low voltage value of a fuel cell single cell under rated working conditions, more than one hundred or even hundreds of single cells are generally required to achieve high power output. Therefore, the requirements for the quality consistency control of bipolar plates are very high. [0004] In order to improve the power density of the fuel cell stack an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20H01M8/0204
CPCG01M3/20H01M8/0204Y02E60/50
Inventor 李丽甘全全朱从懿胡正坤戴威
Owner SHANGHAI SHENLI TECH CO LTD
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