Automatic fuel cell stacking system

Abstract

The invention discloses an automatic fuel cell stacking system. The system comprises a transferring and conveying device, an electric pile stacking device, a press fitting and locking device and a detection device, wherein the electric pile stacking device is used for stacking electrode plates into an electric pile assembly module, the press fitting and locking device is used for carrying out press fitting and locking on the electric pile assembly module, and the detection device is used for carrying out air tightness and insulation detection on the electric pile assembly module; the transferring and conveying device comprises a conveying mechanism and a plurality of transferring mechanisms. The electric pile stacking device, the press fitting and locking device and the detection device are sequentially arranged at intervals in the conveying direction of the conveying mechanism; the plurality of transferring mechanisms are respectively arranged in one-to-one correspondence with the electric pile stacking device, the press fitting and locking device and the detection device; and the electric pile assembly module is transferred between the conveying mechanism and the electric pile stacking device and between the press fitting and locking device and the detection device. High-precision automatic assembly of the fuel cell stack is realized, and the stack efficiency of the fuel cellstack is greatly improved.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to an automatic stacking system for fuel cells. Background technique [0002] The proton exchange membrane fuel cell is composed of multiple single cells stacked in series, fastened by internal positioning screws or clips. Composition of fuel cell stacks. When the stack is working, hydrogen and oxygen enter from the inlet respectively, and are distributed to the bipolar plates of each single cell through the main channel of the stack. When stacking, it is necessary to ensure that the plates are pressed against each other to prevent gas leakage, and ensure that the main gas channels of each plate are aligned so that hydrogen and oxygen can reach each single cell of the fuel cell smoothly. The stacking quality of the fuel cell is closely related to the performance of the battery product. If there is no good positioning device for each single cell during a...

AI Technical Summary

Problems solved by technology

However, when the nut is locked, the locking sequence is completed independently, resulting in a sequence of locking and differences in locking. It is difficult to control the balance of the final tightening, resulting in the uneven pressure on the top and bottom of the end plate, and the bipolar plate and membrane inside the stack. It is also difficult to balance the direct mutual pressure of the electrodes; and there are processing errors in raw materials such as bipolar plates, and the processing errors will accumulate during final assembly, which will increase the unevenness of the force inside the stack.

When the contact pressure in some areas inside the stack is too high, it is easy to deform the bipolar plate, and the proton exchange membrane fuel cell produced by it will also fail and damage; when the contact pressure in some areas inside the stack is too small, the bipolar plate and other components There will be gaps between them, and the seal of the fuel cell is not firm, which will cause hydrogen and oxygen to cross each other. In addition, the contact resistance between the membrane electrode and the bipolar plate will also increase sharply, and the internal resistance of the battery will increase, which will eventually affect the performance of the entire fuel cell.

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