Temperature control method of power battery, AMPC controller, thermal management system and medium

Abstract

The invention provides a temperature control method of a power battery, an AMPC controller, a thermal management system and a medium. The thermal cycle topological structure of the power battery comprises a battery pack and a temperature control device. The temperature control method comprises the following steps of: establishing a temperature control prediction model of the power battery according to a thermal cycle topological structure of the power battery; respectively acquiring the predicted temperature of the battery pack and the energy consumption information of the temperature control device by using the temperature control prediction model and a plurality of groups of preset temperature control parameter information; according to a preset optimization performance index and a target function, selecting one group of temperature control parameter information from the plurality of groups of temperature control parameter information as control input of the temperature control device; and correcting the temperature control prediction model in real time according to the obtained state parameters of the battery pack. According to the temperature control method of the power battery, the AMPC controller, the thermal management system and the medium provided by the invention, the temperature of the battery pack of the power battery can be controlled to be within/close to an appropriate range under the condition of not increasing any hardware cost, and the energy consumption of an actuator can be reduced.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a battery energy-saving temperature control method, a controller, a thermal management system and a storage medium. Background technique [0002] In recent years, due to the pressure of energy costs and the increasing emphasis on environmental protection by the government and consumers, electric vehicles have attracted people's attention and developed rapidly as an effective means to alleviate environmental problems and energy crises. The power battery is a key component of an electric vehicle and determines the power performance of the vehicle. During the working process of the car, especially in the case of acceleration and climbing, the power required by the electric car is relatively large, and the power battery will generate a lot of heat at this time. This heat must be dissipated quickly to keep the car running safely and stably. Therefore, it is necessary to perf...

AI Technical Summary

Problems solved by technology

However, there are the following defects: too much reliance on engineering experience, when targeting complex thermal management systems with large thermal inertia, in order to give priority to ensuring safety, a large control margin is usually reserved, which makes the actuator consume more energy, and Difficult to follow the optimal operating point

Another method is to control the temperature of the battery pack through the air conditioning system (cold air or hot air) in the vehicle body. On the one hand, the air conditioning system does not communicate with the battery management system of the vehicle, and the temperature control is not timely and accurate. The effect is poor or energy is wasted; on the other hand, it is difficult to ensure effective temperature control of the battery pack in non-air-conditioned seasons and when the air conditioner is not turned on for parking and charging

Another approach is to set up an independent air-conditioning system for the battery pack to cool or preheat the battery pack separately, which is equivalent to a pure electric bus equipped with two independent air-conditioning systems. On the one hand, the increase in the weight of the body leads to an increase in power consumption and affects the cruising range of the vehicle

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