Method for realizing kinetic energy recovery by completely relying on lithium battery

Abstract

The invention discloses a method for realizing kinetic energy recovery by completely relying on a lithium battery. The method comprises the following specific steps of 1, recovering kinetic energy at a low-voltage stage, and setting a protection value to be slightly higher than an over-discharge value of a battery cell; 2, the kinetic energy recovery in the high-pressure stage generating capacity redundancy by setting an overcharge value; 3, releasing the overcharge state through a discharge current identification method; 4, performing actual application example; and 5, kinetic energy recovery in other stages being carried out according to a conventional charging mode. According to the method for realizing kinetic energy recovery by completely relying on the lithium battery, the whole-course barrier-free kinetic energy recovery of the trolley by the lithium battery pack can be realized without increasing extra hardware cost, and the overvoltage safety risk of the battery pack is also greatly guaranteed by adopting a mode of coexistence of full charge protection and single overvoltage protection; and safety protection can be provided even under extreme abnormal conditions.

Description

technical field [0001] The invention relates to the field of program control methods applied to lithium battery management systems, in particular to a method for fully relying on lithium batteries to realize kinetic energy recovery. Background technique [0002] Chinese Patent No. CN106976401A discloses a graphene lithium battery supercapacitor dual energy control method and system. Although the energy recovered by supercapacitor charging is mentioned to improve the battery life of electric vehicles, the energy recovery and efficiency There are still big problems in improving battery life and battery life. Traditional kinetic energy recovery systems cannot completely rely on lithium batteries to absorb braking energy. Limit the current or use the energy release device to solve the large loss of energy. The conventional lithium battery management system will set the cell overvoltage protection to prohibit continuous charging, and all cells will recover from the overvoltage re...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for fully relying on lithium batteries to realize kinetic energy recovery, so as to solve the problem that the existing method for realizing kinetic energy recovery of lithium batteries proposed in the above background technology requires trickle charging mode when the battery voltage is low. It will not take care of the battery status. The lithium battery system after the conventional full charge does not meet the conditions for recharging due to the monomer voltage, which may easily lead to the failure of kinetic energy recovery.

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