Fuel cell system

Abstract

The invention discloses a fuel cell system. The fuel cell system comprises a shell, a distribution manifold, a high-voltage assembly and at least two electric piles, the shell comprises a first box body and a second box body, an installation cavity is defined by the first box body and the second box body, and the distribution manifold and the electric piles are all located in the installation cavity; the high-voltage assembly comprises a high-voltage output assembly and a copper bar group, the high-voltage output assembly is mounted on the first box body, the copper bar group is used for connecting output electrodes of the electric piles in series and forming a positive electrode connecting end and a negative electrode connecting end, and the positive electrode connecting end and the negative electrode connecting end are respectively connected with the high-voltage output assembly. And fluid distribution is performed on each electric pile through the distribution manifold, so that high-power electric pile power output of which the power is improved through a plurality of relatively low-power electric piles can be realized. The high-voltage output assembly is fixedly connected with the first box body, so that after the first box body and the second box body are buckled, electric connection of the high-voltage output assembly, the copper bar group and the electric pile can be realized only by correspondingly installing the high-voltage connecting pieces, and the assembly process of the high-voltage assembly is simplified.

Description

technical field [0001] The application belongs to the technical field of fuel cells, and in particular relates to a fuel cell system integrated with multiple electric stacks. Background technique [0002] Fuel cell electric vehicles are considered to be one of the most important development technology routes for new energy vehicles due to their long driving range, convenient fuel filling, and similar performance to traditional vehicles. [0003] The electric stack is the place where the electrochemical reaction occurs, and it is also the core part of the fuel cell power system. It is composed of multiple single cells stacked in series. The bipolar plates and the membrane electrodes are stacked alternately, the seals are embedded between the monomers, and the fuel cell stack is formed after being compressed by the intake end plate and the blind end plate and then fastened with fasteners. When the stack is working, hydrogen and oxygen are respectively introduced from the inle...

AI Technical Summary

Problems solved by technology

[0004] The number of monolithic batteries connected in series in a single stack is limited, because when stacking, once the number exceeds a certain number, the following problems will occur: 1) The gas distribution is uneven, resulting in the underutilization of the last few batteries; 2 ) Inconsistency of the single cells, resulting in excessive voltage deviation of the cells; 3) Uneven heat dissipation, resulting in overheating of the single cell in the middle

At present, multi-stack integrated fuel cells have technical problems of complex internal structure and difficult assembly, which restricts the development and application of multi-stack integrated fuel cells

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