Charging machine

Abstract

Disclosed is a charging machine including a main charging circuit and a charging control circuit, the main charging circuit comprises a filter circuit, a rectifier filter circuit, a pulse bleeder circuit, a half-bridge inversion circuit, a drive control circuit and a high frequency rectifier charging circuit, the charging control circuit comprises a power supply circuit, a voltage stabilizing circuit, a self-recycle circuit, a current detecting circuit, a voltage detecting circuit and a temperature detecting circuit, and the charging control circuit also comprises a control display circuit and a pulse modulation switching power supply integrating control circuit. The charging machine can effectively release the sulfation phenomenon of a battery plate by controlling a single chip microcomputer in the control display circuit to adopt multi-stage pulse type charging method, fives stages including constant current, constant voltage, floating charge I, average charge and floating charge II. Each stage in process outputs different duty cycle pulsing signal through the control of single chip microcomputer and then a half-bridge power tube is controlled to reach intermittent pulse current charge and depolarization effect.

Description

Technical field: [0001] The invention relates to the technical field of intelligent charging, in particular to an intelligent charger suitable for charging lead-acid batteries on various electric vehicles, electric forklifts and other electric vehicles. Background technique: [0002] Lead-acid batteries are widely used due to their low manufacturing cost, large capacity, and low price. Electric vehicles, electric forklifts and other electric vehicles generally use lead-acid battery series battery packs, and chargers mostly use constant current, constant voltage and small current floating charge three-stage charging methods. Due to the working characteristics of high current, deep discharge, and cyclic use of electric vehicle battery packs, the use of ordinary chargers will cause a large number of battery plate salinization and water loss, which shortens the service life of the battery pack; at the end of its life, it will also cause Part of the battery pack cannot be conver...

AI Technical Summary

Problems solved by technology

Due to the working characteristics of high current, deep discharge, and cyclic use of electric vehicle battery packs, the use of ordinary chargers will cause a large number of battery plate salinization and water loss, which shortens the service life of the battery pack; at the end of its life, it will also cause Part of the battery pack cannot be converted from the second stage to the third stage, resulting in thermal runaway of the battery charging, resulting in deformation and damage

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