Protection method and circuit for charging and discharging of battery

Abstract

The invention relates to a protection method for charging and discharging of a battery. The protection method comprises the following steps of: S1, sampling an output voltage value of the rechargeable battery according to a set sampling time interval to obtain a sampled value; S2, comparing the sampled value with the set minimum value, if the sampled value is less than the set minimum value, deleting the sampled value, and if the sampled value is more than the set minimum value, entering S3; S3, comparing the sampled value with the set maximum value, if the sampled value is more than the set maximum value, deleting the sampled value, and if the sampled value is less than the set maximum value, entering S4; S4, carrying out averaging on the sampled value to obtain an average sampled value; S5, comparing the average sampled value with charging protection voltage and discharging protection voltage to generate a compared result; and S6, carrying out protection or charging and discharging operation on the compared result. The invention also relates to a protection circuit for charging of the battery. By the adoption of the protection method and the protection circuit, the influence of fluctuation caused by accidental factors or hardware on charging and discharging of the charging battery is reduced or eliminated by deleting abnormal values.

Description

technical field [0001] The invention relates to the field of circuit applications, and more specifically, to a charging and discharging protection method and circuit for a rechargeable battery. Background technique [0002] With the development of society, the current flashlights, especially LED flashlights, are powered by rechargeable batteries. Therefore, in order to ensure the durability of rechargeable batteries, rechargeable batteries are equipped with corresponding charging protection circuits. The current charging protection circuits are generally equipped with The maximum charge protection voltage and the minimum discharge protection voltage realize charge and discharge protection by detecting the difference between the voltage of the rechargeable battery and the protection voltage. However, when judging whether the battery voltage is greater than the charging protection voltage or whether it is lower than the discharging protection voltage, it is easily affected by ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for reducing or removing accidental factors or hardware-induced defects by deleting abnormal values, aiming at the defect that the charging protection and discharging protection judgments of the charging protection circuit in the prior art are easily affected by accidental factors or hardware. Rechargeable battery charge and discharge protection method and circuit affected by fluctuations

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