Heat exchanger and fuel cell system

Abstract

The invention provides a heat exchanger and a fuel cell system, and belongs to the technical field of fuel cell heat exchangers. The heat exchanger comprises a front end plate, a heat exchange plate assembly and a rear end plate which are sequentially stacked. The front end plate is provided with n sets of inlets and outlets, the heat exchange plate assembly comprises at least one heat exchange unit, the heat exchange unit at least comprises n flow field plates which are sequentially stacked, each flow field plate comprises 2n-1 through holes, each flow field plate comprises a main circulation hole and n-1 sets of sub through holes, each group of sub through holes comprises a sub inlet and a sub outlet and is used for circulating the same medium, the main circulating hole of each flow field plate is used for circulating different mediums, and the through holes, corresponding to the same medium, of two adjacent flow field plates are communicated; an inlet and an outlet, corresponding to the same medium, in the front end plate are communicated with a through hole, corresponding to the same medium, in the flow field plate adjacent to the front end plate, and the rear end plate is used for sealing the heat exchange plate assembly. The size, weight and cost of the heat exchanger can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of fuel cell heat exchangers, in particular to a heat exchanger and a fuel cell system. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a device that directly uses hydrogen energy to generate electricity. PEMFC directly converts the chemical energy stored in hydrogen fuel and oxidant into electrical energy, with high energy conversion efficiency; PEMFC is environmentally friendly, and the only discharge is water. . Therefore, fuel cell technology is considered to be the preferred clean and efficient power generation technology in the 21st century. [0003] The fuel cell system needs air and hydrogen as fuel, and the air is mostly supplied in the form of an air compressor. The temperature of the air will rise after passing through the air compressor. If the high-temperature air is directly sent into the stack, it will not only lead to poor performance of the fuel cell, Severe dam...

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Problems solved by technology

[0006] A further object of the present invention is to alleviate the problem of poor performance of the single cell at the inlet of the fuel cell due to low hydrogen inlet temperature

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