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Sealing groove structure for realizing integrated injection molding of metal bipolar plate sealing

A metal bipolar plate and injection molding technology, which is applied in the direction of sealing/supporting devices, electrochemical generators, fuel cell parts, etc., can solve the problems of restricting mass production, loss of sealing effect, and easy deformation of sealing components , to achieve the effect of improving robustness and durability and improving efficiency

Pending Publication Date: 2021-04-30
SHANGHAI ZHIZHEN NEW ENERGY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned structure is very dependent on the adhesive that plays a bonding role. When the adhesive bonding effect is not good, the sealing element will fall off and the sealing effect will be lost. This is not conducive to ensuring the long-term effectiveness of the fuel cell sealing system.
In fact, most of the adhesives currently on the market cannot meet the performance requirements of easy application (low viscosity), good bonding effect (high peel strength of metal-sealing materials) and durability (heat and acid resistance) at the same time.
In addition, because the sealing element is easily deformed, it is impossible to apply glue with the help of automated equipment. The efficiency and precision of the glue application process is also a key factor that limits the mass production of fuel cell metal bipolar plates in actual production.

Method used

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  • Sealing groove structure for realizing integrated injection molding of metal bipolar plate sealing
  • Sealing groove structure for realizing integrated injection molding of metal bipolar plate sealing
  • Sealing groove structure for realizing integrated injection molding of metal bipolar plate sealing

Examples

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Embodiment 1

[0048] see Figure 5 , a seal groove structure that realizes the integrated injection molding of metal bipolar plates, including metal bipolar plates, the cathode plate and the anode plate of the metal bipolar plate are provided with sealing grooves, and the sealing grooves are used for injection molding sealing components, sealing The groove includes an outer ring sealing groove 1 and a three-chamber sealing groove 2. The outer ring sealing groove 1 corresponds to the flow field area of ​​the pole plate and the overall outer edge of the three-chamber opening area, and the three-chamber sealing groove 2 corresponds to the three-chamber opening area of ​​the pole plate. The differences between the sealing groove and the prior art are described below.

[0049] The outer ring sealing groove 1 of the cathode plate and the outer ring sealing groove 1 of the anode plate, and the three-chamber sealing groove 2 of the cathode plate and the three-chamber sealing groove 2 of the anode p...

Embodiment 2

[0057] A seal groove structure that realizes integrated injection molding of metal bipolar plate sealing, the difference from Embodiment 1 is that in this embodiment, see Figure 11 to Figure 13 , the through-holes 7 in the outer ring seal groove 1 and the three-chamber seal groove 2 are evenly distributed and are all circular, and the size of each through-hole 7 is φ3mm and there are a plurality of circular convex reinforcing ribs evenly distributed around the sides 8. The gap between the through-holes 7 is 20 mm, and the processing of the through-holes 7 is realized by a laser cutting process. The depth of the outer ring seal groove 1 and the first seal groove 201 of the three-chamber seal groove 2 are both 5mm, and the second seal groove 202 of the three-chamber seal groove 2 is realized by a stamping process, the depth of the depression 2022 is 5mm, and the convex groove 2021 The height is 10mm and the width is 20mm. The width of the bonding wire 3 is 0.2mm.

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Abstract

The utility model discloses a sealing groove structure for realizing integrated injection molding of metal bipolar plate sealing, and aims to solve the problem that a sealing element is easy to fall off from a metal bipolar plate after long-term use when poor bonding and stacking, poor assembly and disassembly exist in a traditional bonding mode. The sealing grooves of a cathode plate and an anode plate are symmetrical, and a plurality of through holes are correspondingly formed in the sealing grooves of the cathode plate and the anode plate along the extending direction, so that sealing elements formed on the cathode plate and the anode plate in an injection molding mode can form an opposite-pull type sealing structure, the robustness and the durability of the whole sealing structure are improved, and meanwhile, the efficiency of a sealing process is improved. Reinforcing ribs can be arranged around the through holes to further stabilize sealing. The through holes can be realized through a stamping or laser drilling process, the reinforcing ribs can be realized through a stamping process, and a welding wire is adjusted according to the position of the through hole and can be realized through a laser welding process.

Description

technical field [0001] The invention belongs to the field of fuel cell metal bipolar plates, and in particular relates to a sealing groove structure for realizing integrated injection molding of metal bipolar plates sealing. Background technique [0002] The operation of the fuel cell is to electrochemically react hydrogen and oxygen to generate electricity to maintain the operation of the car. Therefore, hydrogen and oxygen are the raw materials for the reaction and are essential. At the same time, since the continuous accumulation of heat generated by the reaction will reduce the catalytic effect of the catalyst, cooling water needs to enter the interior of the fuel cell to take away the heat and maintain the stability of the internal environment. These three types of substances are located in different spaces inside the fuel cell, and need to be isolated from each other and not affect each other. Therefore, for the purpose of isolation, the presence of a sealing element ...

Claims

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Application Information

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IPC IPC(8): H01M8/0276H01M8/0286
CPCH01M8/0276H01M8/0286Y02E60/50
Inventor 姜天豪张茜茜毕飞飞胡鹏杜祥永鲍恩泽蓝树槐
Owner SHANGHAI ZHIZHEN NEW ENERGY EQUIP CO LTD