On-line integrated integrated switching constant current charger

Abstract

The invention discloses an online type integrated switching type constant-current charging device. The online type integrated switching type constant-current charging device comprises an industrial frequency transformer, a rectification and filtering circuit, a constant-current charging power circuit, a constant-current charging control circuit and an output filtering circuit. The AC 220-V alternating current is transformed by the online type industrial frequency transformer T1 and then is output to an integrated bridge type rectifier D1, and then is rectified by the D1, and stable direct-current voltage VIN is output by a capacitor C1; the direct-current voltage VIN is output to the constant-current charging power circuit; the constant-current charging power circuit is controlled by the constant-current charging control circuit to output constant current to the output filtering circuit, and the output constant current is filtered by the output filtering circuit to form constant direct current output. The online type integrated switching type constant-current charging device has the characteristics of strong power grid adaptation capability, wide output voltage range, rapid charging speed, automatic floating charge mode, high reliability, strong environment adaptation capability and the like.

Description

technical field [0001] The invention relates to a constant current charger, in particular to an on-line integrated switch type constant current charger. Background technique [0002] Because the internal resistance of the battery is very low when feeding power, the charging current must be limited to ensure charging safety, so a special charger is generally used to charge the battery. The traditional charger uses a current-limiting resistor connected in series at the output end to limit the charging current. The structure is relatively simple, but the current-limiting resistor connected in series will increase the power consumption of the charger itself and affect the charging efficiency. Secondly, when the battery is nearly fully charged, the charging time increases due to the decrease of the charging current. And this kind of charger generally does not support floating charge mode charging. Contents of the invention [0003] The present invention is an on-line integrat...

AI Technical Summary

Problems solved by technology

Traditional chargers limit the charging current by connecting a current-limiting resistor at the output end in series. The structure is relatively simple, but the current-limiting resistor connected in series will increase the power consumption of the charger itself and affect the charging efficiency.

Secondly, when the battery is nearly fully charged, the charging time increases due to the decrease of the charging current.

And this kind of charger generally does not support floating charge mode charging

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