Transcritical CO2 system for vehicle thermal management and control method thereof

Abstract

The invention discloses a transcritical CO2 system for vehicle thermal management and a control method of the transcritical CO2 system. The system comprises a compressor, an outdoor heat exchanger, an indoor secondary heat exchanger, an indoor main heat exchanger, a heat regenerator, a battery heat exchange plate, a gas-liquid separator, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a first bidirectional all-pass throttle valve, a second bidirectional all-pass throttle valve and a third bidirectional all-pass throttle valve. And a fourth two-way all-pass throttle valve, an outdoor fan and an indoor air blower. The technical problems that in a current vehicle transcritical CO2 thermal management system, energy matching of a battery and a passenger compartment is difficult, and the system stability is poor and control is difficult due to large lag of a waterway can be solved; according to the invention, by providing a new configuration structure, the problem of energy distribution of a battery loop is thoroughly solved, and the system stability can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of heat pump air conditioning and thermal management of new energy vehicles, in particular to a transcritical CO for vehicle thermal management 2 System and its control method. Background technology [0002] The endurance mileage of electric vehicles strongly depends on the charging and discharging characteristics of batteries, and the charging and discharging characteristics of batteries are affected by the battery temperature field. The refined temperature management of batteries, motors and electronic control equipment of new energy vehicles is an effective means to ensure their comprehensive endurance; On the other hand, the heating of electric vehicles in winter lacks waste heat to be used. At present, the heating efficiency in winter is low and the energy consumption is high, which has become another restriction on the endurance of electric vehicles; In addition, the field of electric vehicle thermal manage...

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Problems solved by technology

Specifically, the present invention specifically provides a transcritical CO 2 system to address current vehicle transcritical CO 2 In the thermal management system, the energy matching between the battery and the passenger compartment is difficult, and the large lag of the waterway leads to poor system stability and difficult control; the present invention completely releases the energy distribution problem of the battery circuit by proposing a new configuration structure, which can greatly increase the stability of the system sex

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