Fuel cell stack fixing method

A fuel cell stack and fixing method technology, which is applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems of poor battery contact, affecting battery performance, and uneven force on the battery, so as to save production costs, reduce weight, and reduce stress. small force effect

Active Publication Date: 2021-03-16
BEIJING IN POWER NEW ENERGY +2
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a fixing method for a fuel cell stack, aiming to solve the problem that the battery is subjected to uneven force in the way of bolt fastening, which leads to poor internal contact of the battery and affects the performance of the battery

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  • Fuel cell stack fixing method

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Embodiment Construction

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] see figure 1 , the method for fixing the fuel cell stack provided by the present invention will now be described. The fixing method of the fuel cell stack, the fixing method includes the following steps:

[0035] Step 1, pre-setting radially distributed compression grooves on the stack end plate 4;

[0036] Step 2, neatly stacking the stack end plate 4 and the single cells according to a preset order, and a plurality of single cells constitute the battery stack 1;

[0037] Step 3, using a press to compress the stack end plate 4 and the single cell;

[00...

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Abstract

The invention provides a fuel cell stack fixing method, which belongs to the technical field of fuel cells, and comprises the following steps of: arranging radially distributed pressing grooves on a stack end plate in advance; neatly stacking an electric pile end plates and single cells according to a preset sequence, wherein the plurality of single cells form a battery pile body; pressing the stacked stack end plates and the single cells by using a press machine; winding a winding wire along the pressing grooves to fasten the electric pile end plate and the single cells together; winding thehead end and the tail end of the winding wire on a fastening rod, and using a fastening rod for screwing, so that the pre-tightening force of the winding wire reaches a preset value; and enabling thefastening rod to be parallel to the winding wire, and fixing the two ends of the fastening rod to the winding wire. According to the invention, the fuel cell can realize self-balancing stress in a manner of winding and fastening the winding wire, so that the problem of non-uniform internal stress caused by bolt fixation is effectively solved, leakage is reduced, the performance of the fuel cell isimproved, the service life of the fuel cell is prolonged, and the weight and the manufacturing cost of the fuel cell are reduced.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and more specifically relates to a fixing method for a fuel cell stack. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) stack is a fuel cell that generates electricity and heat by the action of hydrogen-containing fuel and air. Membrane electrode (MEA), the membrane electrode is the reaction place of the fuel cell, and the bipolar plate is the reaction fluid channel. In order to make the reaction of the fuel cell stable and efficient, it is necessary to connect each unit cell in series Add gaskets between them, and rely on pressure to complete the sealing. The sealing performance of the fuel cell directly affects the performance and life of the fuel cell. [0003] At present, the main fixing method of the fuel cell is to rely on the fastening of the screw to complete the assembly of the stack. This fixing method has the following defects and deficiencies: [0004] (1...

Claims

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Application Information

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IPC IPC(8): H01M8/2404H01M8/2475H01M8/248
CPCH01M8/2404H01M8/248H01M8/2475Y02E60/50Y02P70/50
Inventor 杨坤张欣禹马帅张泷党士佳李莉索红亮
Owner BEIJING IN POWER NEW ENERGY
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