Intelligent charger capable of detecting battery pack connection during over-discharge protection and automatically starting charging and implementation method of intelligent charger

Abstract

The invention discloses an intelligent charger capable of detecting battery pack connection during over-discharge protection and automatically starting charging and implementation method of the intelligent charger. The charger comprises a mains supply interface, a power conversion circuit, a relay and a charging interface which are connected with one another sequentially; a battery to be charged is charged through the charging interface; the charger further comprises a constant voltage / constant current output control module; the constant voltage / constant current output control module includesa single-chip microcomputer module, a power supply module, a battery voltage collection module and an output current collection module; the battery voltage collection module and the output current collection module are used for collecting the voltage and current of the battery and transmitting the voltage and current to the single-chip microcomputer module; the single-chip microcomputer module sends control signals to the relay; the battery voltage collection module includes a voltage bias circuit; and forward voltage bias is added to collected voltage signals through the voltage bias circuit,so that the single-chip microcomputer module can collect the negative voltage signals of the battery. The charger of the invention can accurately recognize the connection state of the battery when over-discharge protection is enabled for the battery so as to start charging. The intelligent charger of the invention has the advantages of wide application range, greater use convenience and high intelligent degree.

Description

technical field [0001] The invention belongs to the technical field of high-power lithium battery chargers, and in particular relates to an intelligent charger that can detect the connection of an over-discharge protection battery pack and automatically start charging. Background technique [0002] At present, the high-power chargers on the market, in order to achieve reverse connection, short circuit and open circuit protection, the internal output of the charger uses a relay as a protection switch. This switch needs to take a certain amount of current from the battery terminal after the battery is connected correctly (usually Tens of mA) to activate the relay to start charging. If the lithium battery to be charged has already been protected by over-discharge, the battery cannot provide the activation current of the protection switch, resulting in the problem that it cannot be charged. Contents of the invention [0003] In order to solve the above-mentioned problems in t...

AI Technical Summary

Problems solved by technology

If the lithium battery that needs to be charged has been protected by over-discharge, the battery cannot provide the activation current of the protection switch, resulting in the problem that it cannot be charged.

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