Thermal management system of fuel cell engine

Abstract

The invention belongs to the technical field of fuel cells, and discloses a thermal management system of a fuel cell engine. The thermal management system comprises a fuel cell stack, a PTC heating loop, a heat dissipation loop and an intercooling loop, and the heat management system adopts nanofluid as a heat exchange medium. According to the thermal management system provided by the invention, the nanofluid is adopted as a heat exchange medium, and coordinated work of the PTC heating loop, the heat dissipation loop and the intercooling loop is utilized, so that the thermal management system is simpler and more compact in structure, smaller in flow resistance and excellent in cold start performance, and efficient and safe operation of a galvanic pile and a whole fuel cell engine can be maintained.

Description

Technical field[0001]The present invention belongs to the technical field of fuel cells, and more particularly to a thermal management system of a fuel cell engine.Background technique[0002]The thermal management system of the fuel cell engine, which keeps the fuel cell stack and the temperature of each accessory in a certain range via a cooling circuit, and simultaneously satisfy the air side intake temperature of the electric stack through the center-cooler, thereby ensuring normal system. Efficient operation. Therefore, the thermal management system has a crucial impact on the normal use and life of the fuel cell engine, and is one of the core technologies of fuel cell engine integration design and development.[0003]At present, the fuel cell heat management system is mainly facing the following key issues in integration design and development: 1. The temperature of the electric pile cooling, the temperature of the electric stack must be controlled within a certain range, this is ...

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Problems solved by technology

2. The compactness of the system structure. In order to achieve the heat dissipation power required by the stack, the thermal management system often needs to match a relatively large radiator. However, in the process of vehicle layout, passenger cars do not have enough space for heat dissipation. How to arrange the thermal management system and how to make the thermal management system compact is a problem that must be solved in practical engineering applications

3. The problem of residual electricity treatment. When the stack stops working, there will still be a small amount of hydrogen-oxygen reaction to generate electricity. How to deal with excess electricity is very important for the safety performance of the system

However, the cold start performance, compact structure and residual power handling capacity of the current fuel cell thermal management system need to be improved or enhanced.

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