Thermal management system of proton exchange membrane fuel cell

Abstract

The invention discloses a thermal management system of a proton exchange membrane fuel cell. The thermal management system comprises heat dissipation devices, a fuel cell stack, a cooling liquid distribution pipe, a cooling liquid collection pip and a control system, wherein each heat dissipation device comprises a microchannel heat sink, an ultrathin uniform temperate plate evaporation cavity assembly and a sealing plate, the microchannel heat sink comprises a shell and a heat dissipation fin array, the ultrathin uniform temperate plate evaporation cavity assembly comprises a bottom plate and a capillary core, one end of the capillary core is in direct contact with a base part of the microchannel heat sink, an evaporation cavity is formed between the bottom plate and the base part, the ultrathin uniform temperate plate evaporation cavity assembly and the sealing plate are respectively connected with two ends of the microchannel heat sink, the fuel cell stack is formed by laminating and combining at least two single cells in a series mode, the heat dissipation device is correspondingly arranged at one side of each single cell, the single cells and the heat dissipation devices are arranged in a lamination way at intervals, and the control system is used for supplying a cooling liquid and controlling the cooling liquid to flow. By the thermal management system of the proton exchange membrane fuel cell, the fuel cell can be enabled to be in an appropriate temperature range during the operation process, and the temperature uniformity in the fuel cell can be ensured.

Description

technical field [0001] The invention relates to the technical field of fuel cell heat management, in particular to a proton exchange membrane fuel cell heat management system. Background technique [0002] Fuel cells that use hydrogen energy to work are safe and environmentally friendly. The proton exchange membrane fuel cell in the fuel cell has the advantages of high energy conversion efficiency, zero emission, low operating noise, high reliability, convenient maintenance, and little influence on power generation efficiency by load changes, etc., and has high research value. [0003] Proton exchange membrane fuel cells have high temperature requirements, and the optimum temperature range is between 60 and 90 °C. If the temperature is too high, it will lead to dehydration of the proton exchange membrane, decrease in conductivity, and damage to battery performance, thereby affecting the service life of the battery. During the operation of the proton exchange membrane fuel ...

AI Technical Summary

Problems solved by technology

This heat dissipation method cannot ensure that the temperature of the proton exchange membrane fuel cell is controlled within the optimal range during operation, and it cannot guarantee the uniform temperature inside the fuel cell. Thermal stress is easily generated inside the proton exchange membrane fuel cell, so that protons Exchange Membrane Fuel Cells Destroyed

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