Temperature control system and method for power battery pack of electric vehicle

Abstract

The invention discloses a motorcar dynamic battery bag temperature control system and control method, which comprises the following parts: driving device, currency pipe, temperature sensor, electronic control unit 5 and circulating dielectric heat-exchanging device, wherein the output of dynamic battery bag 1 connects inlet of driving device, whose output connects the inlet of dynamic battery bag 1 through currency pipe; the temperature signal is sent from temperature sensor to electronic control unit, which controls start and stop for driving device; the circulating dielectric heat-exchanging device and driving device are cascaded between inlet and outlet of dynamic battery bag 1. The invention guarantees battery to work within normal temperature scale, which lengthens battery lifetime and improves battery property.

Description

【Technical field】 [0001] The invention relates to the field of power battery packs of electric vehicles, in particular to the field of temperature control of power battery packs of electric vehicles. 【Background technique】 [0002] As early as 1996, Ford, Chrysler, GM, Honda, Nissan, Toyota and other brands of electric environmentally friendly vehicles have been put into mass production and entered the market, but after a period of use by consumers, the driving performance and price are expensive. And other problems began to emerge, and these problems began to hinder the further commercialization of electric vehicles. [0003] Electric vehicles are usually driven by a power battery pack, which includes multiple power batteries. The temperature control of the power battery pack is one of the problems. The performance of the battery directly affects the power, economy and mileage of the electric vehicle, while the life of the battery affects the cost of the electric vehicle....

AI Technical Summary

Problems solved by technology

General power batteries, such as lithium-ion batteries, have relatively good working performance in the temperature range of 15°C to 30°C. Working outside this temperature range will affect the discharge performance of the battery and shorten the battery life.

The traditional power battery pack temperature control method uses a single cooling method of air or liquid to control the working temperature of the battery. It is easy to make the battery overcooled in winter and in the case of low current discharge, and to overheat the battery in summer and in the case of high current discharge. Thus affecting the discharge performance of the battery, shortening the battery life, and further affecting the power, economy and mileage of the electric vehicle

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