Lead-acid storage battery charging management system

Abstract

A lead-acid storage battery charging management system disclosed by the present invention comprises a battery protector, the battery protector is provided with a circuit board, the circuit board is provided with a DCDC voltage conversion circuit, a charging control circuit and a plurality of temperature sensors, and the DCDC voltage conversion circuit, an input filter circuit and the charging control circuit are electrically connected with each other. The charging control circuit comprises a control chip, a photoelectric coupler and a power MOS tube, the control chip is connected with a grid electrode of the power MOS tube, a drain electrode of the power MOS tube is connected with a negative electrode of the battery pack, a source electrode of the power MOS tube is connected with a negative electrode of an input line of the charger, the control chip is electrically connected with the temperature sensor, and the temperature sensor is attached to the inner wall of a single battery of the battery pack through a lead. The control chip compares a temperature value detected by the temperature sensor with a preset temperature value and then controls the conduction time of the power MOS tube so as to change the input charging current. The method has the advantages that the battery temperature is detected in real time, battery charging swelling is prevented by adjusting the charging current, and the service life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of battery charging, and in particular relates to a lead-acid battery charging management system. Background technique [0002] The existing lead-acid battery packs of electric bicycles are directly charged after being connected to the charging port through the charger, and the battery packs do not have any protective circuit device. During the charging process of the battery pack, if the battery pack or the charger fails, it may cause the battery pack to be directly charged, or even cause a fire due to overheating. Especially in the later period of battery use, the battery pack loses water due to long-term charging, which makes it impossible to turn the light in the later stage of charging, which makes the battery overheat and loses water too quickly. Such a vicious cycle will greatly shorten the service life of the battery pack. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is t...

AI Technical Summary

Problems solved by technology

During the charging process of the battery pack, if the battery pack or the charger fails, it may cause the battery pack to be charged directly, or even cause a fire due to overheating

Especially in the later stage of battery use, due to the long-term charging and dehydration of the battery pack, the lights cannot be turned on in the later stage of charging, causing the battery to overheat and lose water too quickly. Such a vicious cycle will greatly shorten the service life of the battery pack.

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