A thermal management system and method suitable for direct methanol fuel cells

Abstract

The invention provides a heat management system and a heat management method thereof, which are applicable to a direct methanol fuel cell. The heat management system comprises a heating module, a cathode heat dissipation module and a selection module; working modes of the heat management system comprise: a heating mode, a normal mode and a heat dissipation mode, wherein the selection module responses to the heating mode to control a first branch circuit to be conducted and the heating module is started; the selection module responses to the normal mode to conduct any one of the first branch circuit or a second branch circuit; the selection module responses to the heat dissipation mode to conduct the second branch circuit, and the cathode heat dissipation module is started.

Description

technical field [0001] The invention relates to a heat management system, in particular to a heat management system and a heat management method of a direct methanol fuel cell. Background technique [0002] The existing direct methanol fuel cell system, because its suitable working environment temperature is 65-75 degrees Celsius, in the case of low ambient temperature, starting from a low ambient temperature to full power output requires a long start-up time and cannot be quickly Responding to automotive requirements can easily cause a bad user experience. [0003] Existing direct methanol fuel cell systems such as figure 1 As shown, the air is filtered by the air filter 101 and blown into the air inlet of the electric stack 103 by the blower 102 as an oxidant, and the methanol in the methanol tank 104 enters the mixing tank 106 through the methanol pump 105 to mix and dilute with water, and then enters the electric stack through the mixing pump 107. The fuel inlet of sta...

AI Technical Summary

Problems solved by technology

That is, the thermal management system of the existing direct methanol fuel cell system only includes the anode radiator 108 and the cathode radiator 109. In this form, the stack 103 only relies on the heat generated by the stack reaction to increase the temperature during startup, resulting in the required startup It takes a long time, and the reaction products produced from the anode and the cathode pass through the anode radiator 108 and the cathode radiator 109 respectively, and there is energy loss

[0004] In order to solve the above problems, the present invention provides a thermal management system suitable for direct methanol fuel cells, which is used to heat the reaction product produced by the cathode of the stack when the stack temperature is low to solve the problem of long start-up time at low temperature

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