Vehicle thermal management system suitable for new energy vehicle under low-temperature working condition

Abstract

The invention relates to a thermal management system, in particular to a vehicle thermal management system suitable for a new energy vehicle under a low-temperature working condition. The vehicle thermal management system comprises a passenger compartment thermal management system, a battery thermal management system and a motor electronic control thermal management system. The passenger compartment thermal management system comprises a passenger compartment refrigerating circuit and a passenger compartment heating circuit; the passenger compartment refrigerating circuit and the passenger compartment heating circuit share a compressor, a gas-liquid separator (A / D) and an outdoor heat exchanger (HEX); the passenger compartment refrigerating circuit further comprises a first electromagneticvalve, a thermal expansion valve (TXV) and an indoor evaporator (HEX); and the passenger compartment heating circuit further comprises an indoor condenser (HEX), an electronic expansion valve (EXV1) and a second electromagnetic valve. The passenger compartment thermal management system and the battery thermal management system share the outdoor heat exchanger (HEX). The battery thermal managementsystem adopts a secondary circuit system and comprises a refrigerator circuit and a cooling liquid circuit; and the refrigerant circuit and the cooling liquid circuit achieve heat exchanging through achiller.

Description

technical field [0001] The invention relates to a heat management system, in particular to a whole-vehicle heat management system for a new energy vehicle suitable for low-temperature working conditions. Background technique [0002] In recent years, with the decline of fossil fuels and the increasingly prominent environmental protection issues, road transportation has caused huge energy consumption and greenhouse gas emissions. Concerns about global warming and oil security have accelerated the development of environmentally friendly energy sources. The government and related groups take measures to make energy develop in an environmentally friendly direction, thereby reducing greenhouse gas emissions and meeting energy needs. [0003] The driving power of electric vehicles and fuel vehicles is different, and the air conditioners of the two are also very different. It is mainly reflected in: the refrigeration compressor of the air-conditioning system of fuel vehicles is d...

AI Technical Summary

Problems solved by technology

In comparison, the thermal management system of the electric system is more complex, with more components and high-end

Studies have shown that the current lithium-ion batteries used in electric vehicles can only exert their best performance at 20-45°C. When the battery operating temperature is higher than 45°C, the capacity and service life of the battery will be significantly reduced, and high temperature will aggravate thermal runaway. Risks and Security Risks

When the operating temperature of the battery is too low, the internal resistance of the battery is too large, the discharge performance deteriorates, and the capacity and service life will also be reduced.

Images