Cooling and heating system of power battery of electric automobile

Abstract

The invention provides a cooling and heating system of a power battery of an electric automobile. The cooling and heating system comprises a working medium pump, a battery heat exchanger, an auxiliary electric heater, a liquid storage device, a plurality of heat exchangers and a plurality of three-way valves; a working medium which has a gas-liquid two-phase or liquid state in a utilization temperature range is adopted; the parts and structural parts are connected from an outlet of the working medium pump according to a designed route; heat exchange is carried out between the working medium pump and an external cold source or an external heat source by utilizing the first heat exchanger and heat exchange is carried out between the working medium pump and environment air by utilizing the second heat exchanger; the external cold source is a cold quantity provided by a steam compression type refrigerating system or a cold quantity provided by thermoelectric refrigeration equipment or a cold quantity provided by other cold sources; the external heat source is a heat quantity provided by a steam compression type heat pump or a hot quantity provided by thermoelectric equipment or a heat quantity provided by other heat sources. By adopting the cooling and heating system of the power battery of the electric automobile, provided by the invention, the power battery can be kept in a relatively good working temperature region all the year and electric energy consumed by cooling or heating is reduced; the utilization efficiency of the power battery is improved and the cruising ability of the electric automobile can be prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicle design and manufacture, and relates to the technology of electric vehicle batteries, in particular to a cooling and heating system for electric vehicle power batteries. Background technique [0002] In modern society, cars have become an indispensable means of transportation. The research on new energy vehicles caused by environmental protection and oil crisis has always been valued by automobile manufacturers and major automobile users. With the improvement of environmental protection requirements and the increasingly stringent emission standards for automobiles, traditional fuel vehicles are subject to increasingly strict restrictions. New energy vehicles, especially electric vehicles, are becoming more and more accepted by the society, and have become a research and development project of major industrial countries and major automobile manufacturers, and become one of the main trends ...

AI Technical Summary

Problems solved by technology

However, there are some deficiencies in the battery temperature control system of the existing electric vehicle. For example, two systems of cooling and heating need to be placed in the battery pack of the electric vehicle at the same time, which makes the structure of the temperature control system more complicated and the volume smaller. Huge, occupying the limited space of the battery pack, even if the heat pump system is used for cooling and heating, the cooling and heating energy consumption of the battery will be high

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