Over-limit protection method for charge and discharge power of power battery of pure electric logistics vehicle

Abstract

The invention discloses an over-limit protection method for charge and discharge power of a power battery of a pure electric logistics vehicle. The over-limit protection method is used for the pure electric logistics vehicle, a whole vehicle controller, the power battery and a power battery system, wherein the whole vehicle controller and the power battery are installed on the pure electric logistics vehicle, and the power battery system is installed on the whole vehicle controller. According to the over-limit protection method, the over-limit protection of the charge and discharge power of the power battery can be completed by estimating the charge and discharge power limit of the power battery, controlling the charge and discharge power limit of the power battery, detecting the actual charge and discharge power of the power battery and according to the charge and discharge power limit of a motor; the charge and discharge capacity of the power battery and the charge and discharge capacity of the motor are comprehensively considered based on the charge and discharge power limit of the power battery and the actual charge and discharge power of the current power battery; and the overlimit of the charge and discharge power of the power battery is timely and effectively protected through PI negative feedback control, and therefore the service life and safety of the battery are protected.

Description

technical field [0001] The invention relates to the technical field of power battery charge and discharge power overrun protection methods, in particular to a pure electric logistics vehicle power battery charge and discharge power overrun protection method. Background technique [0002] The logistics vehicle is a unit mobile assembly equipment equipped with four casters for transporting and storing materials. It is often used in the logistics distribution of large supermarkets or the logistics turnover between factory processes. [0003] The display of the products stored in the logistics trolley is eye-catching. During transportation, on the one hand, it can protect the safety of the materials, on the other hand, it will not cause clutter to the sorted and equipped products, and the loading and unloading is very labor-saving; the wheels are usually designed as two Directional wheels, two universal wheels to facilitate manual implementation. The logistics trolley can carry...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the control of power battery charging and discharging power exceeding the limit is a very important control technology for pure electric logistics vehicles. It will also affect the drivability and comfort of the vehicle at the boundary of battery charging and discharging power, and reduce the performance of the whole vehicle

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