Lithium battery management and protection device of pure electric vehicle

Abstract

A lithium battery management protection device of a of pure electric vehicle is characterized in that an electromagnetic coil group is arranged between a shell and a buffer filling interlayer, an electromagnetic coil is used as a magnetic induction detection circuit to detect changing current generated in the coil due to movement of a buffer plate. A control circuit is provided with a first sensing signal acquisition unit for acquiring the changing current generated in the coil due to the movement of the buffer plate; a first sensing signal processing unit used for acquiring the change current, amplifying the change current, filtering the change current and calculating an initial value, a final change value and a change rate of the change current; and a first arithmetic unit for obtaining digital signals corresponding to the initial value, the change final value and the change rate of the current, and then calculating a control signal needing to be output to the electromagnetic coil. The acceleration value, acting on the buffer plate, generated by the magnetic force applied to the buffer plate by the magnetic field generated by the electromagnetic coil equals the current acceleration value of the buffer plate, and the acceleration direction acting on the buffer plate generated by the magnetic force is opposite to the current acceleration direction of the buffer plate.

Description

technical field [0001] The invention relates to a lithium battery field device, in particular to a pure electric vehicle lithium battery management and protection device. Background technique [0002] The existing pure electric vehicle lithium battery management protection device, such as in structure, Chinese invention application CN201810042280.0 discloses a lithium battery placement protection device for electric vehicles, including a protective shell, a hanging ring and a lithium battery body. The top of the housing is snapped and connected to the top cover, and several uniform heat dissipation holes are opened in the top cover; the side surface of the protective housing is fixedly connected to the hanging ring, and one side of the hanging ring is threaded with the fixing bolt; the protective housing The inner wall is fixedly connected to the elastic splint made of elastic rubber material, and a placement groove is opened in the elastic splint; the inner wall of the plac...

AI Technical Summary

Problems solved by technology

It can be seen that such circuit structures in the prior art are also very simple and actually only have the function of charging and discharging control, and are rarely involved in the management and protection circuit of lithium batteries; Protection especially requires better protection of lithium batteries in special occasions. For example, in the process of driving a car, the driver's lithium battery will be damaged due to driving habits or road conditions during a large turn or sudden braking or rapid acceleration. The protective or stressed shell will give a large acceleration to the inside of the lithium battery or the direct shell of the lithium battery, and this acceleration is reflected by a large force. Degree of damage, the life of lithium batteries will be greatly reduced over time

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