Quick charging circuit with polarity conversion type charging function

Abstract

The invention discloses a quick charging circuit with a polarity conversion type charging function. The quick charging circuit with the polarity conversion type charging function comprises a first input end and a second input end, wherein the first input end and the second input end are connected to two input ends of a linked switch protection circuit respectively, two output ends of the linked switch protection circuit are connected to a polarity conversion circuit after passing through a power supply filter circuit, a silicon controlled voltage regulating circuit, a rectifying circuit, a charging and discharging circuit, an IGBT switching circuit and a silicon controlled control circuit, an automatic control circuit is further connected between the first input end and the second input end, and the automatic control circuit comprises an auxiliary power supply control module and is connected with a phase detection and phase shifting trigger circuit control module which is connected with a silicon controlled voltage regulating module through a main control circuit. Compared with an ordinary charger, the quick charging circuit with the polarity conversion type charging function has the advantages that the charging speed is improved by 5-8 times when the quick charging circuit is used for charging a rechargeable battery, and the polarity conversion type charging function is achieved, namely that a positive charging effect is achieved under the condition that either the positive electrode or the negative electrode of a rechargeable battery is connected to the quick charging circuit.

Description

technical field [0001] The invention relates to the field of charging circuits, in particular to a fast charging circuit with a polarity conversion charging function. Background technique [0002] In view of the high pollution of petrochemical energy and the decreasing energy, electric vehicles, as a new energy source, have attracted much attention from all parties because of their zero emissions and low energy consumption. However, fast charging of electric vehicle batteries has been a bottleneck hindering its development. [0003] The current charging methods for electric vehicle batteries are: [0004] 1. Constant current voltage charging method, that is, first charge to the rated value with a constant current, and then change to a constant voltage to complete the remaining charging process; [0005] 2. Three-stage charging method, that is, first charge with constant current to the rated voltage, then change to constant voltage to charge to the rated current value, and ...

AI Technical Summary

Problems solved by technology

[0007] The common disadvantage of the above charging methods is that the charging current cannot be too large, so the charging speed is not fast, and the purpose of fast charging cannot be achieved.

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