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Welding method of metal bipolar plate of fuel cell

A technology of metal bipolar plates, welding methods, applied in the direction of fuel cells, battery electrodes, welding equipment, etc.

Inactive Publication Date: 2019-11-29
浙江锋源氢能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to provide a welding method for metal bipolar plates of fuel cells, which can effectively reduce the degree of welding deformation and welding defects, ensure welding quality, and improve the yield of bipolar plates

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  • Welding method of metal bipolar plate of fuel cell
  • Welding method of metal bipolar plate of fuel cell
  • Welding method of metal bipolar plate of fuel cell

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Embodiment Construction

[0029] see in conjunction Figure 1 to Figure 3 As shown, according to an embodiment of the present invention, a method for welding a metal bipolar plate of a fuel cell is provided, the metal bipolar plate includes an anode plate and a cathode plate, comprising the following steps:

[0030] Attaching the anode plate to the cathode plate, and determining a sealed welding path; after the anode plate is attached to the cathode plate, performing tack welding on both sides of the sealed welding path, the tack welding The welding power is the first power; the sealing welding is performed along the sealing welding path, the welding power of the sealing welding is the second power, and the first power is lower than the second power, and it can be understood that the The parameters of the welding machine used in the positioning welding and sealing welding process, such as duty cycle, welding speed, and welding power, can be based on the corresponding operating procedures in the prior a...

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Abstract

The invention provides a welding method of a metal bipolar plate of a fuel cell. According to the welding method of the metal bipolar plate of the fuel cell, the metal bipolar plate comprises an anodeplate and a cathode plate, and the welding method comprises the steps of attaching the anode plate and the cathode plate, and determining a seal welding path; performing fixed-position welding on twosides of the seal welding path after the anode plate and the cathode plate are attached, wherein the welding power of fixed-position welding is first power; and carrying out seal welding along the seal welding path, wherein the welding power of seal welding is second power, and the first power is lower than the second power. According to the welding method of the metal bipolar plate of the fuel cell, the degree of welding deformation and welding defects can be effectively reduced, the welding quality is guaranteed, and the yield of the bipolar plate is increased.

Description

technical field [0001] The invention belongs to the technical field of fuel cell manufacturing, and in particular relates to a welding method for a metal bipolar plate of a fuel cell. Background technique [0002] A fuel cell stack is a device that directly generates electrical energy from fuel through an electrochemical reaction, and it is formed by stacking fuel cells one by one. The single cell of the fuel cell is mainly assembled by core components such as anode plate, cathode plate, membrane electrode and seal. Before assembling into a stack, the anode plate and the cathode plate are usually welded to form a bipolar plate, one side is the anode flow channel, the other side is the cathode flow channel, and the middle is the cooling flow channel, so that on the bipolar plate Three medium areas are formed, hydrogen area, air area and cooling water area. In the stack structure, the three areas are separated by laser welding lines and seals, and the medium between the thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0276B23K31/02H01M4/86
CPCH01M8/0276B23K31/02H01M2004/8694Y02E60/50
Inventor 袁蕴超朱峥栩沈润王海峰王利生
Owner 浙江锋源氢能科技有限公司