Control method and control system for battery cooling

Abstract

The invention provides a control method and a control system for battery cooling. The control method comprises the steps of detecting the maximum temperature of a core body of a battery, judging whether the maximum temperature of the core body of the battery is higher than a first temperature threshold, performing a slow cooling mode on the battery if so, judging whether the maximum temperature of the core body of the battery is higher than a second temperature threshold, performing a rapid cooling mode on the battery if so, judging whether the maximum temperature of the core body of the battery is lower than the second temperature threshold and higher than a third temperature threshold, performing an air conditioner closed rapid cooling mode on the battery if so, judging whether the maximum temperature of the core body of the battery is lower than the third temperature threshold and higher than the first temperature threshold, and performing a slow cooling mode on the battery if so. According to the method and the system, the economy, a battery cooling rate and a cooling effect are comprehensively considered according to setting of the temperature thresholds; fuel oil consumption is reduced; an energy source is saved; the battery cooling is realized by cooling a battery circulation waterway coolant with an air conditioner refrigerant; battery overheating can be effectively avoided; and the performance and the safety of a complete vehicle are ensured.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a battery cooling control method and system. Background technique [0002] With the development of battery technology and the encouragement of the national electric vehicle policy, various electric and range-extended electric vehicle models have been launched in the automobile market. Reducing energy consumption and extending the driving range of electric vehicles have become the top priorities of research and development by various automobile manufacturers. Among various technologies, the temperature control management system that actively cools the battery, through the liquid cooling circulation system, the internal water pump and the heater are connected in series to realize the heating function of the battery at low temperature, which is helpful for improving the range of use of electric vehicles and overcoming the impact of electric vehicles on low temperature. I...

AI Technical Summary

Problems solved by technology

[0003] However, the structure of the battery cooling system is relatively complex, and precise control cannot be achieved between the battery's cooling capacity demand for the air conditioner and the actual cooling capacity that the air conditioner can provide. The actual cooling effect is greatly affected by the system transfer efficiency and the battery heat exchange law.

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