Battery temperature control system

Abstract

The invention discloses a battery temperature control system, which comprises a temperature collecting unit, a temperature simulation unit, a control unit and a temperature regulating unit, wherein the temperature simulation unit outputs the predicating temperature of a battery on the basis of a battery heat model; the temperature collecting unit is used for collecting the real temperature of a plurality of temperature measuring points distributed in the battery; the control unit is used for obtaining the predicting temperature and the real temperature, and outputs a temperature regulating instruction on the basis of the difference of the real temperature and the predicating temperature so as to drive the temperature regulating unit. The control system provided by the invention has the advantages that the temperature of the heat model and the temperature measured in the reality are combined; simulation data and practically measured data are compared and selected; a cooling device / heating device can be timely controlled for performing temperature regulation on the battery; meanwhile, the heat model is subjected to inverse modification on the basis of the practically measured data so as to improve the system stability; the effective temperature management on the battery is facilitated.

Description

technical field [0001] The invention relates to a battery temperature control system, which belongs to the field of batteries. Background technique [0002] In recent years, pure electric vehicles and hybrid vehicles with batteries as the main power source have been widely put into use. This emerging means of transportation has attracted people's attention for its low-carbon emission, energy-saving and light-weight features. However, the development of electric vehicles at this stage is largely limited by factors such as the stability, safety and service life of power batteries, among which the most prominent is the influence of battery operating temperature. In order to ensure that the battery does not pose a safety hazard and maximize its performance, the battery temperature needs to be maintained within a certain range during the operation of the electric vehicle. Local overheating of the battery or inconsistent overall temperature distribution may lead to irreversible ...

AI Technical Summary

Problems solved by technology

This cooling system control mode based on temperature monitoring has two disadvantages: one is that the temperature sensor used for monitoring cannot cover every corner of the battery box and the inside of the battery. Therefore, when local overheating occurs elsewhere in the battery, the thermal management system cannot control it; second, there is a certain hysteresis in the startup of temperature control devices (such as fans or heaters), and when severe thermal runaway occurs , unable to respond in time

Images