Structure of high-integration-density fuel cell with compensation ability

A high-integration, fuel cell technology, applied in fuel cells, structural parts, battery pack parts, etc., can solve the problem of reducing the volume specific power and weight specific power of the stack, increasing the space and weight of the stack, and the compensation effect is not enough. Ideal and other issues, to achieve the effect of improving volume specific power and weight specific power, saving space, and reducing the types of components

Inactive Publication Date: 2014-05-14
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

The disadvantages of the prior art are: when the dimensions of the components in the electric stack drop the same, no matter how the spring compensates, the electric stack cannot maintain the original assembly force, the compensation ability is restricted, and the compensation effect is not ideal; when the spring is used to compensate the electric stack , increase the space and weight of the stack, and reduce the volume specific power and weight specific power of the stack

Method used

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  • Structure of high-integration-density fuel cell with compensation ability
  • Structure of high-integration-density fuel cell with compensation ability
  • Structure of high-integration-density fuel cell with compensation ability

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing and example.

[0012] The end plate 1 is made of antimony, bismuth or gallium alloy materials that expand and contract with heat. There is no compensation spring on the end plate 1, and the inner side of the end plate is provided with an end plate sealing groove 2, an end plate sealing rubber ring 3, The plate flow field 4 and the conductive modification tab 5 inside the end plate. The fuel cell stack is assembled in the following order: end plate 1 at one end, bipolar plate 8, membrane electrode (MEA) 7, bipolar plate 8, membrane electrode (MEA) 7..., until the last membrane electrode (MEA) 7, then place the current collecting plate 12 and the end plate 1 at the other end, use the screw 10 and the nut 9 to tighten the two end plates and the bipolar plate between the two end plates, the membrane electrode (MEA) and the current collecting plate Fixed connection. Compared with...

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Abstract

The invention provides a structure of a high-integration-density fuel cell with compensation ability. The structure comprises a membrane electrode, a bipolar plate and a collector plate assembled between two end plates, wherein compensation springs are not arranged on the two end plates, and the two end plates are made from alloy material of antimony, bismuth or gallium with the character of expansion and contraction. The structure has the beneficial effects that the unbalance of an assemble force caused by the size change of each component due to expansion and contraction in an electric pile can be completely compensated, the compensation efficiency and capability can be improved, the springs are not needed, the space can be saved, the integration density of the fuel cell can be improved, and the volume ratio power and the weight ratio power of the electric pile can be improved. Furthermore, the varieties of parts are reduced, so that the long-term running reliability of the electric pile can be improved to a certain degree.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to the fuel cell stack technology. Background technique [0002] In the prior art, a spring is provided on the end plate of the fuel cell, and the change of the fastening force of the stack inside the fuel cell caused by the expansion of the membrane in the fuel cell stack and the relaxation of the compressive stress is effectively compensated by the deformation of the spring, and the load along the stacking direction of the fuel cell is reduced. Variety. Take the stack initial assembly force of 15KN as an example. Assume that the size of each component in the stack is reduced by 3mm, and the assembly force of the stack is reduced by 6KN. If the spring is extended by 3mm to compensate for the size change of each component in the stack, each spring needs to release 4kN of elastic potential energy. At this time, the components in the stack are stressed 15KN, the force of the spri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04
CPCH01M8/247H01M8/248Y02E60/50
Inventor 刘常福赵帅侯中军付宇王红梅窦永香明平文
Owner SUNRISE POWER CO LTD
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