Lithium battery charging and discharging method and device and application thereof

Abstract

The invention relates to a lithium battery charging and discharging method and device and application thereof. The lithium battery charging and discharging method comprises the steps that the stop time of a lithium battery and the voltage of the lithium battery are detected and compared with a preset threshold value, and the voltage of the lithium battery is kept below a safety voltage through a discharging circuit; and meanwhile, the time when the lithium battery enters the dormant state and the dormant voltage of the lithium battery are detected, the time and the dormant voltage are comparedwith a preset threshold value, the lithium battery is charged properly in time through the charging circuit, and the lithium battery is prevented from being damaged due to high electrochemical activity. Obvious decline of capacity and performance of the lithium battery due to self-discharge is avoided, and the service life of the lithium battery is prolonged.

Description

technical field [0001] The invention belongs to the field of lithium batteries, and relates to a method for charging and discharging a lithium battery, a device and an application thereof. Background technique [0002] Since the commercialization of lithium batteries in the 1990s, they have been widely used in various industries such as electric vehicles, digital products, and battery cars. The performance of the batteries will decrease due to electrochemical reactions in the idle state, and if they are not used for a long time When the voltage drops below the critical value, the capacity and performance of the battery will decline significantly, affecting the life of the battery, and even leakage will occur in severe cases. [0003] CN102148410A discloses a battery charging method to improve battery life; the battery charging method mainly consists in adjusting the appropriate charging cut-off voltage as at least one of the battery remaining capacity and idle time changes, ...

AI Technical Summary

Problems solved by technology

[0002] Since the commercialization of lithium batteries in the 1990s, they have been widely used in various industries such as electric vehicles, digital products, and battery cars. The performance of the batteries will decrease due to electrochemical reactions in the idle state, and if they are not used for a long time The voltage will drop below the critical value, and the battery capacity and performance will decline significantly, which will affect the battery life and even cause serious leakage.

[0003] CN102148410A discloses a battery charging method to improve battery life; the battery charging method mainly consists in adjusting the appropriate charging cut-off voltage as at least one of the battery remaining capacity and idle time changes, and the charging cut-off voltage is not Fixed value, which will change with the current state of the battery, thereby increasing the charging efficiency of the battery; although it can adjust the charging cut-off voltage according to the idle time of the battery to improve the charging efficiency of the battery and prolong the life of the battery, it does not solve the problem of battery charging. The problem of battery capacity and performance degradation caused by long-term idleness, and its improvement effect on battery life is not enough

[0004] CN103402026A discloses a processing method of a mobile terminal idle mode and a mobile terminal, which specifically includes: presetting the optimal storage range value of the battery power of the mobile terminal in the long-term idle mode; enabling the long-term idle mode of the mobile terminal, and Detect the current battery power at regular intervals and obtain the battery power, and compare the acquired battery power with the upper and lower limits of the preset stored optimal storage range; when the current battery power is within the maximum within the best storage range value, a shutdown command is issued to automatically shut down the mobile terminal; when the current battery power is not within the best storage range value, a discharge or charge command is issued to make the battery power reach the best storage range value; Currently known monitoring methods often only consider the power of the battery, but do not pay attention to the matching relationship between battery power and time. If only the power is monitored and the time is ignored, the battery will be frequently charged and discharged when it is not in use, which will affect the battery life. and electrical performance

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