Packaging structure of integrated fuel cell stack and assembling method thereof

Abstract

The invention provides a packaging structure of an integrated fuel cell stack and an assembling method of the packaging structure. The packaging structure of the fuel cell stack comprises a front endplate, an upper shell, a lower shell, a reactor core structure and a rear cover plate; the upper end plate is provided with a common pipeline which is communicated with a reactor core of the electricpile to form a flow channel for providing reaction gas and cooling liquid; and the upper shell and the lower shell are provided with anti-collapse structural components which are tightly attached to the reactor core. According to the packaging structure of the integrated fuel cell stack, the performance of the fuel cell stack is greatly improved, the size and the weight of the fuel cell stack areeffectively reduced, and the overall integration degree of the fuel cell stack is greatly improved; meanwhile, the vibration resistance and the insulativity of the fuel cell stack are further improved. Meanwhile, the integrated packaging structure can achieve rapid assembly and assembly line work.

Description

technical field [0001] The invention relates to the technical field of fuel cell packaging, in particular to a packaging structure of an integrated fuel cell stack and an assembly method thereof. Background technique [0002] The fuel cell stack is formed by end plates that hold and compress on both sides, an insulating spacer, a current exporter, a series of single cells stacked in layers along the normal direction of the single cell reaction surface, and a packaging structure. The electric stack uses hydrogen fuel and air as the reaction gas, and generates electric energy through electrochemical action, which is exported through the current exporter to supply power to the load. When the stack is in use, its structural stability will be affected by vibration and shock on the one hand, and also by itself on the other hand, and because the fuel cell is limited by fuel loading, its volume is generally large. [0003] Chinese patent (publication number is CN106450372A) disclos...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent (publication number is CN106450372A) discloses a kind of stack fastening structure with external positioning function: the external positioning block is fastened on the back side of the side packaging plate, and then fastened to the stack. Its disadvantages are: 1 .Split packaging cannot be sealed and cannot meet the protection level standards of automotive fuel cells; 2. The fastening direction of the packaging plate and the end plate of the stack is the normal direction of the stack. After fastening, the positioning block and the stack The assembly tolerance between the sides of the body is difficult to guarantee, so that the positioning of the stack cannot be realized

[0004] Chinese patent (publication number CN103633358A) discloses a highly integrated metal plate fuel cell stack: it discloses a split-type stack packaging structure, and the side packaging plate plays the role of fastening the stack. One-piece packaging cannot achieve sealing, and cannot meet the protection level standards of automotive fuel cells, and the assembly size deviation cannot be guaranteed; on the other hand, there is no positioning structure for the stack on the packaging structure, and the stack will not Very prone to leakage failure due to vibration collapse

[0005] Chinese patent (publication number is CN110098414A) discloses a packaging structure of a fuel cell bipolar plate and a fuel cell stack, which solves the problem of the large number of components in the existing packaging structure, the failure of the stack due to vibration and deformation, and the large number of sealing surfaces Or the technical problem of poor cross-sealing effect of the sealing surface, but the structure is relatively complex, the volume and weight are large, it cannot be adapted to the core structure of different stacking methods, and it is not easy to achieve rapid installation

[0006] Therefore, there is a lack of a fuel cell stack packaging structure with strong shock resistance, good insulation, compact volume and weight, capable of packaging core structures of different stacking methods, and a relatively simple and fast assembly method

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