Fuel cell thermal management system with heat accumulation and heating functions and control method

Abstract

The invention discloses a fuel cell thermal management system with heat accumulation and heating functions and a control method. The fuel cell thermal management system comprises water circulation systems including a small circulation waterway system, a large circulation cooling system, a deionized water circulation system and the like and a control system which takes an ECU (Electric Control Unit) as a core. According to the fuel cell thermal management system disclosed by the invention, the small circulation waterway system is capable of realizing a low-temperature heating function on a fuel cell by adopting a heat accumulator, so that compared with a traditional electric heater technology, the fuel cell thermal management system has the advantages that the control accuracy is higher, and the fuel cell thermal management system is more energy-saving and efficient; meanwhile, as the deionized water circulation system is adopted, an ion exchanger is skillfully designed on a degassing pipe of a large circulation waterway, a degassing function and a deionizing function of the fuel cell thermal management system are perfectly combined together, and the influence of a high-water-resistance ion exchanger in the prior art on a main circulation waterway is effectively avoided.

Description

technical field [0001] The present invention relates to a thermal management system and a control method of a fuel cell, more specifically, the present invention relates to a thermal management system and a control method of a fuel cell with heat storage and heating functions. Background technique [0002] Traditional fuel vehicles have brought enormous pressure to oil resources and environmental protection, and the development of new energy vehicles has become a research hotspot around the world. New energy vehicles using fuel cells as the power source can achieve zero emissions and are not limited by cruising range, which is a development direction of new energy vehicles in the future. However, the fuel cell needs to have the best performance within a certain temperature range. The lower limit Tmin of the best temperature range is generally 60°C, and the upper limit Tmax is generally 75°C. Therefore, a well-designed thermal management system is particularly important for ...

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Problems solved by technology

[0003] At present, the fuel cell thermal management system uses electric heating to achieve low-temperature heating of the fuel cell, which has the problems of low energy utilization rate and rough control; in addition, the ion exchanger is installed in the circulating waterway, which affects the water flow of the circulating waterway and high-temperature water. Problems that can cause ion exchangers to fail

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