Fuel cell end plate

Abstract

The invention discloses a fuel cell end plate which is adapted to be arranged at two ends of a fuel cell stack. The fuel cell end plate is characterized by comprising an external end plate, a pressure buffer and a pressure dispersion balancing plate; the pressure buffer is an elastic part which is vertically arranged between the external end plate and the pressure dispersion balancing plate. According to the fuel cell end plate, the problems of uneven internal stress in an electric pile, excessive local pressure and great peripheral appearance size of the electric pile caused due to processing errors of parts of the electric pile can be solved by adjusting internal pressure; the requirements of processing tolerances of parts in the electric pile can be reduced; the processing costs of the parts in the electric pile can be effectively reduced; the production efficiency can be improved; due to the pressure self-regulation in the electric pile, the service life of the electric pile can be prolonged and the performance of the electric pile can be improved; the requirement on space in the electric pile due to expansion caused by heat and contraction caused by cold can be met under the condition that the appearance size is not changed.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell end plate. Background technique [0002] Fuel cells are more and more loved and used by people because of their high energy conversion efficiency, low noise, low carbon, zero emissions, flexible and convenient use, low operating temperature, and high energy density. Fuel cells are mainly divided into five major categories: phosphate fuel cell (PAFC), proton exchange membrane fuel cell (PEMFC), alkaline fuel cell (AFC), molten carbonate fuel cell (MCFC), and solid oxide fuel cell (SOFC). kind. Fuel cells usually need to assemble multiple single cells in series to form a stack. The internal design and assembly technology of the stack determine the performance of the stack and the output of the stack. [0003] The fuel cell stack is mainly composed of membrane electrodes (MEA), bipolar plates, collector plates, end plates and fastening bolts. In the field of fuel ...

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