Temperature controller and temperature control method of power battery of electric car

Abstract

The invention provides a temperature controller of the power battery of an electric car. The temperature controller is arranged nearby a battery, and comprises a plurality of temperature probes, a microprocessor and a heating device, wherein the temperature probes and the heating device are mutually and electrically connected with the microprocessor and the battery respectively; when the current battery temperature detected by any one temperature probe is lower than the floor temperature, the microprocessor gives out a heating control instruction, so that the heating device is started to heat the battery; and when the current battery temperature detected by any one temperature probe is higher than the ceiling temperature, the microprocessor gives out a heating-stopping control instruction, so that heating of the heating device on the battery is stopped. Through detecting the battery temperature on multiple points, the real-time monitoring of the multi-position temperature of the battery is achieved, the detecting accuracy and the detecting sensitivity are improved, the battery can be heated automatically in a low-temperature environment, and the heated battery keeps higher volume in a cold environment to improve the use efficiency of the battery effectively.

Description

technical field [0001] The invention relates to electric vehicle battery temperature control technology, in particular to an electric vehicle power battery temperature controller and a temperature control method thereof. Background technique [0002] With the increasing awareness of environmental protection, traditional fuel vehicles are gradually being replaced by new electric vehicles. However, due to the great impact of temperature on the performance of power batteries, and the limitations of traditional electric vehicle design, it affects the driving of electric vehicles in northern regions in winter. Because when the temperature drops, the battery capacity decreases, and the energy stored in the power battery decreases, the electric vehicle will not have enough energy supply during the driving process, resulting in a short journey, which is not conducive to the development and promotion of electric vehicles, and is far from It cannot meet the needs of people all over t...

AI Technical Summary

Problems solved by technology

However, due to the great impact of temperature on the performance of power batteries, and the limitations of traditional electric vehicle design, it affects the driving of electric vehicles in northern regions in winter.

Because when the temperature drops, the battery capacity decreases, and the energy stored in the power battery decreases, the electric vehicle will not have enough energy supply during the driving process, resulting in a short journey, which is not conducive to the development and promotion of electric vehicles, and is far from It cannot meet the needs of people all over the world, so in order to achieve this goal, we have developed a new type of power battery temperature controller, which can make the power battery work at the best ambient temperature, and is also conducive to the estimation of battery SOC

[0003] Therefore, it is necessary to provide an electric vehicle power battery temperature manager that can intelligently control and heat the battery, so as to break through the limitation that the battery capacity decreases in low temperature environment and affects the use efficiency

Images