A Dynamic Natural Adaptive Charging Method

Abstract

The invention relates to a dynamic natural adaptive charging method. The method comprises the following steps: (a) connecting a charger with a charging main circuit and a BMS communication interface of a to-be-charged lithium battery pack, regulating the excitation voltage of the charger to be equal to the voltage of the to-be-charged lithium battery pack, and connecting the charger with the to-be-charged lithium battery pack when the output voltage of the charger is equal to the voltage of the battery pack; (b) increasing the excitation voltage by 0.6-1V, and charging until the charging current is reduced to a first set value; (c) repeating the step (b) until the voltage of a battery cell in the to-be-charged lithium battery pack to achieve a second set value; and (d) regulating the excitation voltage to a rated voltage of the to-be-charged lithium battery pack, and charging by adopting the maximum output current of the charger, and progressively reducing the charging current when a third set value of the battery cell voltage is achieved.

Description

technical field [0001] The invention belongs to the technical field of charging, and relates to a charging method, in particular to a dynamic natural self-adaptive charging method. Background technique [0002] During the electrochemical reaction process of charging and discharging of lithium-ion batteries, the molecular structure of its electrode material does not change theoretically (that is, the electrochemical reaction process is a localized reaction). However, practice has proved that over-discharge of the battery often causes the molecular structure of the lithium-ion battery to partially collapse, which has a great impact on the life of the lithium-ion battery. For example, the relevant standards of lithium-ion batteries stipulate that the end-of-discharge voltage of lithium-ion battery cells is 2.5V~2.7V; however, in actual use, the voltage of lithium-ion battery cells is often lower than this voltage, resulting in over-discharge of the battery; The molecular struc...

AI Technical Summary

Problems solved by technology

Such a charging method may cause the potential gradient to be too large or too small inside the battery, or the ability to provide current is unreasonable, and cannot promote the electrochemical reaction of battery charging according to the objective actual situation of the battery, and the charging efficiency is too low; even some processes Obviously violates the law of electrochemical reaction, causing damage to the battery and affecting its service life

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