Coupling automobile-mounted air conditioner refrigeration and heating system for power battery pack

Abstract

The invention discloses a coupling automobile-mounted air conditioner refrigeration and heating system for a power battery pack. The coupling automobile-mounted air conditioner refrigeration and heating system comprises a frequency-conversion compressor, an air conditioner external unit, a first throttling structure, a second throttling structure, an air conditioner internal unit, a power batterypack heat exchanger, a four-way reversing valve, a first magnetic valve, a second magnetic valve, a third magnetic valve, a fourth magnetic valve, a fifth magnetic valve and a sixth magnetic valve. The coupling automobile-mounted air conditioner refrigeration and heating system adopts the technical scheme that one frequency-conversion compressor has two functions, and achieves multiple working modes by controlling conducting directions of different valves; in summer, the power battery pack heat exchanger is used for cooling the power battery pack, and the air conditioner internal unit conveyscold air into an automobile cabin; in winter, the power battery pack heat exchanger is used for preheating the power battery pack, and the air conditioner internal unit conveys hot air into the automobile cabin; the coupling automobile-mounted air conditioner refrigeration and heating system ensures that the power battery pack is in the optimum working temperature rapidly; and the driving requirement of a new-energy automobile under different climate working conditions is met.

Description

technical field [0001] The invention relates to a cooling and heating system coupled with a vehicle-mounted air-conditioning power battery pack, in particular to the problem of preheating and cooling of the power battery pack in the field of new energy vehicles. Background technique [0002] In recent years, new energy vehicles replacing fuel vehicles as an energy-saving and environmentally friendly means of transportation have received widespread attention and rapid development. Vehicle-mounted power batteries are regarded as one of the core components of new energy vehicles, and their energy efficiency and life are affected by temperature. The impact is very serious. Therefore, the heat dissipation and effective preheating of power batteries in high-temperature environments or high-rate discharges and low-temperature environments have become urgent problems to be solved. Contents of the invention [0003] The present invention aims to solve the problems of low capacity ...

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Problems solved by technology

[0003] The present invention aims to solve the problems of low capacity of the power battery pack at low temperature, short service life and poor temperature uniformity at high temperature, and proposes a technical solution, that is, to use the working medium fluid of the vehicle-mounted air conditioning system to efficiently preheat the power battery pack. heat and cool

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