Battery coolant temperature control method, device, controller, system and medium

Abstract

The invention discloses a battery cooling liquid temperature control method, device, controller, system and medium. By controlling the heater to heat the battery cooling liquid at the maximum available heating gear, when the heating reaches the upper limit of the preset temperature range When the temperature of the battery coolant drops to the lower limit of the preset temperature range, the heating will be shifted to the upper limit, and the balance gear will be determined in the process, so that the temperature of the subsequent battery coolant will drop to the lower limit again. When the lower limit is reached, the heater is controlled to balance the gear heating, so that the temperature of the battery coolant is within the preset temperature range, so that the power battery can increase its own temperature through heat exchange with the battery coolant, which can effectively increase the temperature in low temperature environments. The temperature of the power battery reduces the current impact on the power battery caused by frequent gear shifts in low-temperature environments to increase the temperature, reduces the risk of over-discharge of the power battery, improves the life of the power battery, reduces costs, and increases user experience.

Description

technical field [0001] The present invention relates to the technical field of electric vehicle batteries, in particular to a method, device, controller, control system and computer-readable storage medium for controlling the temperature of battery coolant. Background technique [0002] In recent years, the production and sales of electric vehicles have grown rapidly. As the power source of electric vehicles, power batteries play the role of the heart of electric vehicles. Therefore, the performance of power batteries directly affects the performance of electric vehicles. However, the chemical reaction activity of the power battery is limited in a low temperature environment, which greatly limits the discharge capacity of the power battery, which affects the power and cost of use of the vehicle, and the use of the battery at low temperature will also have a great impact on the battery life. Therefore, it is necessary to heat the power battery at a low temperature, which is o...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a power battery heating method and system to solve the problem of battery over-discharge caused by frequent shifting of gears for heating the battery in a low-temperature environment, resulting in reduced battery life.

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