Battery thermal management control method and related device

Abstract

The invention discloses a battery thermal management control method. The control method comprises the steps: predicting the temperature change of a battery after a preset duration based on read battery parameters, a driving plan, a charging strategy and a preset temperature threshold, and determining the thermal demand of the battery; calculating control parameters of the battery based on the battery parameters, the driving plan and the charging strategy under the thermal demand; and outputting the control parameters and the running time of a battery thermal management system to the battery thermal management system so as to enable the battery thermal management system to execute corresponding operation according to the control parameters within the running time. The method can effectivelyreduce the probability of excessive fluctuation of the battery temperature, improve the control precision of the battery temperature and reduce the energy consumption of thermal management. The invention further discloses the battery thermal management control device and equipment and a computer readable storage medium which all have the technical effects.

Description

technical field [0001] The present application relates to the technical field of power batteries, in particular to a control method for battery thermal management; it also relates to a control device, equipment and computer-readable storage medium for battery thermal management. Background technique [0002] Lithium batteries are more and more widely used as a new energy source, and the ambient temperature of the battery directly affects its performance, life and durability. Therefore, how to efficiently ensure that each single battery in the battery is within a reasonable working range has become a Key issues for the widespread application of batteries. In addition, with the expansion of battery applications, the power used is also increasing, and air cooling or liquid cooling is commonly used for cooling, and air cooling or liquid cooling needs to consume the power of the battery itself to drive, thus affecting the usable power of the battery. [0003] At high temperature...

AI Technical Summary

Problems solved by technology

The temperature fluctuation of the battery is usually large, and the power of the thermal management system does not match the heat dissipation required by the battery, resulting in energy waste and greatly reducing the available power of the battery.

[0004] For example, Chinese patent application 201810984556.7 discloses a control method for power thermal management equipment. In this method, the heat dissipation system does not start to work until the battery temperature reaches the start-up set value. Due to the existence of the specific heat capacity of the battery, the temperature will not drop immediately, but It is to continue to rise and then fall, resulting in relatively rough temperature control; and the premise of adjusting the flow rate of the water pump through the cooling coefficient is to calculate the heat consumption trend first. At this time, the temperature change trend of the battery has formed, and the heat dissipation system lags behind the battery temperature change. , can not control the battery temperature very well; in addition, only the water pump flow is used to match the heat consumption trend, and the power of the cooling or heating module is not controlled, while the maximum power consumption of the thermal management system comes from the cooling or heating module, this control method cannot be energy efficient

As another example, Chinese patent application 201710771219.5 discloses a heat management and temperature uniform control method for electric vehicle battery packs. Due to the small specific heat capacity of the air, it is difficult to control the reasonable range of the temperature rise of the battery when the battery is operated at a high rate of current by air cooling. ; and only the air flow is matched for heat dissipation, and the inlet temperature is not controlled. If natural wind is used, the heat dissipation effect will be weak when the ambient temperature is high; This control method cannot achieve high energy efficiency

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