Power control method and device, vehicle and storage medium

Abstract

The invention discloses a power control method and a device, a vehicle and a storage medium. The method comprises the following steps: determining allowable electric power of front and rear motors ina target vehicle according to a comparison result of the allowable electric power of the front and rear motors in the target vehicle and pre-acquired self allowable electric power of the front and rear motors; selecting system efficiency of the front and rear motors according to the allowable electric power of the front and rear motors; determining allowable torque limit values of the front and rear motors according to the system efficiency of the front and rear motors, the current actual motor speed and the allowable power of the front and rear motors; and controlling the output power of a dynamic battery in the target vehicle in real time according to the front and rear motor allowable torque limit values. According to the embodiment, in the running process of the target vehicle carryinga power battery, a power motor and a high-voltage accessory, the assembly torque capacity is calculated according to the capacity of the power battery and the capacity of the motors, the output powerof the whole vehicle is controlled within the allowable power range, and the influence of battery overcharge or overdischarge on the service life of the battery is effectively avoided.

Description

technical field [0001] Embodiments of the present invention relate to electric vehicle technology, and in particular to a power control method, device, vehicle and storage medium. Background technique [0002] The power source of pure electric vehicles is the power battery, and the energy consumption sources include power motors, high-voltage components (such as air conditioners, etc.), low-voltage components (various controllers, water pumps, water valves, etc.), in order to ensure that the total energy consumption will never exceed the power source The power battery as the power source will generally report the allowable power, and the vehicle control unit (vehicle controller) will ensure that the total energy consumption of each component is within the allowable power range through control. Similarly, the power motor in the energy consumption source also has its own ability, which cannot be exceeded during use. This is also guaranteed by the vehicle controller. The differ...

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Problems solved by technology

[0003] For the pure electric dual-motor four-wheel drive configuration, the above-mentioned problems also exist. In addition, since the speed of the front and rear motors may be different due to the difference in the main reduction ratio, it is impossible to directly compare the allowable power of the battery into torque. The allowable power of a power battery is compared with the torque limit of the two front and rear motors. At the same time, how to select the efficiency coefficient in the comparison process to prevent possible overcharging and overdischarging of the battery is the key to the calculation of the driving capacity of the vehicle.

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