Abstract:

The power, comfort and mileage of electric bus are affected by the performance of warm air conditioners. A kind of warm air conditioning system based on multi-stage heating and co-existence control was designed to provide integrated management for lithium battery cooling water, motor cooling water waste heat and positive temperature coefficient (PTC) heating. The system of air conditioning was heated between −25℃ and 25 ℃ by multi-stage to different temperatures, and the heat load of air−conditioned room of electric bus was analyzed. The mathematical model of the air conditioning system was established, and the fuzzy neural network algorithm was used to control the heat load of the air−conditioned room. The results show that the air conditioning system works well and achieves the expected affects (22.1-27.4 ℃ ), which satisfies the human body's thermal comfort evaluation index.

Key words: new energy vehicles, warm air conditioners, various heating, multi-stage heating