End plate structure of fuel cell stack

Abstract

The invention discloses an end plate structure of a fuel cell stack. The end plate structure comprises an upper end plate, insulating plates, current collection plates, an electric pile body and a lower end plate, wherein the upper end plate and the lower end plate are mutually parallel; the two insulating plates are arranged between the upper end plate and the lower end plate; the two current collection plates are arranged between the two insulating plates; the electric pile body is arranged between the two current collection plates; the end plate structure further comprises a plurality of insulating fixed rods located at the periphery of the electric pile body; two ends of the insulating fixed rods are connected with a nut of the upper end plate and a nut of the lower end plate respectively; inner threads which are matched with outer threads of two ends of the insulating fixed rods are formed in the inner surface of the nuts. The end plate structure disclosed by the invention has theadvantages of preventing gas leakage, saving energy source and reducing power generation cost; the utilization safety of the fuel cell stack is ensured and automatic production is convenient to realize.

Description

technical field [0001] The invention belongs to the technical field of fuel cell stacks, in particular to a fuel cell stack end plate structure. Background technique [0002] In today's global energy shortage and high oil prices, it is imperative to find new energy as a substitute for fossil fuels. Fuel cells are considered to be the fourth-generation power generation technology after hydropower, thermal power and atomic power generation. It directly converts the chemical energy of oxidants and reductants into electrical energy through electrocatalytic reactions. It is an efficient, safe, clean and flexible new type of power generation technology. power generation technology. Among them, the proton exchange membrane fuel cell has a wide range of application prospects in ground power stations, electric vehicles and portable power sources due to its remarkable advantages such as high efficiency, high energy density, low reaction temperature, no noise, and no pollution. [00...

AI Technical Summary

Problems solved by technology

[0003] The fuel cell stack is composed of a plurality of bipolar plates. At both ends of the stacked bipolar plates, there are collector plates, insulating plates, end plates, and hydrogen inlets and outlets, air inlets and outlets, and cooling water inlets and outlets on the end plates. , in the existing end plate structure, the hydrogen inlet needs to be connected to cold parts such as pressure reducing valve, solenoid valve and pressure sensor, and the hydrogen inlet is fixed to the end plate by screws. This connection structure has air leakage, which wastes energy and increases The cost of power generation, there is a big safety hazard in the actual use process

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