Device and method for controlling temperature of external environment of battery

Abstract

The invention belongs to the electric vehicle or hybrid vehicle field, and discloses a device and a method for controlling the temperature of the external environment of a battery. The temperature in the external casing of the battery is controlled to ensure the temperature of the air inlet of the internal casing of the battery in a reasonable range, so the temperature of the battery is effectively controlled, and the working of the battery in a best working temperature range is realized; and a central control system directly lets extraneous air into the external casing of the battery according to the change of the extraneous temperature, heats the external casing of the battery, or utilizes the cooling unit of the external casing of the battery to let cold air into the outer casing of the battery, so the battery is heated or cooled to make the battery work in the best temperature range. The device has a simple structure, and the control method is simple and is easy to implement, so the battery is protected, and the running safety of the electric vehicle or the hybrid vehicle is ensured.

Description

technical field [0001] The invention relates to the field of electric vehicles or hybrid vehicles, in particular to a device and method for controlling the temperature of the external environment of a battery. Background technique [0002] Electric vehicles or hybrid vehicles use a power battery system as an energy source. The power battery will generate a lot of heat during charging or discharging. This heat will increase the temperature of the battery. Higher battery temperature will reduce battery life and battery charge and discharge. Efficiency; and, when the battery works in a low temperature environment, the charging efficiency and discharging efficiency are very low, which cannot meet the charging and discharging requirements of the whole vehicle for the battery. [0003] In order to improve the charging and discharging efficiency of the power battery, it is necessary to ensure that the power battery works within a certain temperature range. Usually, a battery coolin...

AI Technical Summary

Problems solved by technology

However, this solution is affected by the external ambient temperature. If the external ambient temperature is high or low, the temperature of the air entering the battery box will also be high or low, which cannot reasonably cool or heat the battery.

[0004] The main function of the thermal management system of a traditional battery system is to realize the internal temperature cycle of the battery pack. When the external ambient temperature is high or low, it cannot cool or heat the battery, resulting in the battery not working properly in a high or low temperature environment.

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