CN209767211U - Quick charging circuit for lithium battery of variable-frequency generator - Google Patents

Abstract

The utility model relates to a quick charge circuit of variable frequency generator lithium cell, including semi-controllable bridge rectifier circuit and steady voltage trigger circuit, steady voltage trigger circuit includes an electronic switch that has the trigger voltage threshold value, two alternating current input ends of semi-controllable bridge rectifier circuit are connected with the direct current winding output of stator. The utility model discloses inverter generator lithium cell quick charge circuit has utilized stator direct current winding when quick charge circuit output current when big more, the inherent characteristic of semi-controllable bridge rectifier circuit's AC input terminal voltage realizes initial stage heavy current charging, and later stage trickle charges, and charging current is less than the setting value then stops charging, and circuit structure is simple, low cost.

Description

Quick charging circuit for lithium battery of variable-frequency generator

Technical Field

The utility model relates to a quick charge circuit of variable frequency generator lithium cell.

Background

The battery that conventional generating set electricity start-up state generally used is lead acid battery, and the electricity start-up battery that variable frequency generator set used is lithium iron phosphate battery, and there is great difference in the required charging mode of two kinds of batteries, and the present charger to lead acid battery can't be applicable to for lithium cell charging, need adopt the special charger of giving lithium cell charging, and the special charger cost of current lithium cell is high relatively, has aggravated user's economic pressure, is unfavorable for the popularization. In addition, the capacity of the lead-acid storage battery is generally above 7AH, and the charging current is generally about 1A; when the lithium battery is selected, only the storage battery with the voltage of about 1.6AH is generally selected, and the actual use requirement of the user can be met only by a faster charging mode in order to meet the requirement of multiple electric starting of the user.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can give the low-cost charging circuit of the lithium cell quick charge of unit own.

In order to achieve the purpose, the utility model discloses a variable frequency generator lithium battery quick charge circuit, its characterized in that: the voltage stabilizing trigger circuit comprises a semi-controllable bridge rectifier circuit and a voltage stabilizing trigger circuit, wherein the semi-controllable bridge rectifier circuit consists of a first rectifier diode, a second rectifier diode, a first unidirectional silicon controlled rectifier and a second unidirectional silicon controlled rectifier; the voltage stabilization trigger circuit comprises an electronic switch with a trigger voltage threshold value and a trigger voltage charging circuit, wherein a charging power supply of the trigger voltage charging circuit is in positive correlation with an alternating current input voltage value of the semi-controllable bridge rectifier circuit, when the trigger voltage charging circuit is charged to a voltage value larger than the trigger voltage threshold value, the electronic switch in the voltage stabilization trigger circuit is disconnected, the output trigger voltage is closed, the first unidirectional silicon controlled rectifier and the second unidirectional silicon controlled rectifier are cut off, and the semi-controllable bridge rectifier circuit does not output direct current voltage.

The utility model discloses inverter generator lithium battery quick charge circuit has utilized stator direct current winding's inherent characteristic, and when this quick charge circuit output current is big more, two alternating current input end AC1 and AC1 voltage of semi-controllable bridge rectifier circuit are just lower, otherwise, and when output current is little more, two alternating current input end AC1 and AC2 voltage are just higher. When the output current increases to a certain limit value, the output voltage is reduced due to the reduction of the AC1 and AC2 voltages, so that the charging current is automatically reduced, and the current limiting function is realized; when the output current is small to a certain degree, the voltages of the two alternating current input ends AC1 and AC2 are increased to sufficient voltages, so that the trigger voltage charging circuit is charged to be larger than the trigger voltage threshold, the semi-controllable bridge rectifier circuit does not output direct current voltage, and the output current is limited and the output voltage is stabilized by selecting a proper trigger voltage threshold, so that the functions of large-current charging in the initial charging stage of the storage battery and trickle charging in the case of sufficient electric quantity are realized. And this solution is cheap in comparison with the solution using chip control.

As the utility model discloses further set up, voltage regulation trigger circuit is including constituting electronic switch's switch triode, threshold value stabilivolt and charging capacitor, the switch triode is the NPN type, the projecting pole of switch triode is connected with the trigger pole of first one-way silicon controlled rectifier and the one-way silicon controlled rectifier of second respectively through first isolation diode and second isolation diode, be connected with first current-limiting resistance and second current-limiting resistance between the trigger pole on first one-way silicon controlled rectifier and the one-way silicon controlled rectifier of second and the negative pole respectively, the threshold value stabilivolt is connected between the base of switch triode and semi-controllable bridge rectifier's negative pole output, charging capacitor connects between the collecting electrode of switch triode and semi-controllable bridge rectifier's negative pole output, is connected with the bridging resistance between the collecting electrode of the switch triode of telling, two alternating current input of semi-controllable bridge rectifier fill through first charging diode and second respectively and charging capacitor The electric diode is connected with the collector of the switch triode to form the trigger voltage charging circuit. The utility model discloses above-mentioned circuit arrangement adopts ordinary discrete component, and circuit structure is very simple, therefore low cost easily promotes.

The invention will be further explained with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.

Detailed Description

As shown in fig. 1, the utility model discloses frequency conversion generator lithium battery quick charge circuit includes the semi-controllable bridge rectifier circuit and the steady voltage trigger circuit that constitute by first rectifier diode D6, second rectifier diode D7, first one-way silicon controlled rectifier Q1 and second one-way silicon controlled rectifier Q2, first one-way silicon controlled rectifier Q1 and second one-way silicon controlled rectifier Q2's negative pole links to each other as semi-controllable bridge rectifier circuit's positive output OUT +, first rectifier diode D6 and second rectifier diode D7's positive pole link to each other as semi-controllable bridge rectifier circuit's negative output OUT-, two alternating current input end AC1, AC2 of semi-controllable bridge rectifier circuit are connected with stator winding (alternating current output winding) output; the voltage stabilizing trigger circuit comprises an electronic switch with a trigger voltage threshold value and a trigger voltage charging circuit, the electronic switch controls trigger signals of the first unidirectional silicon controlled rectifier Q1 and the second unidirectional silicon controlled rectifier Q2, a charging power supply of the trigger voltage charging circuit is positively correlated with an alternating current input voltage value of the semi-controllable bridge rectifier circuit, namely, the higher the alternating current input voltage value of the semi-controllable bridge rectifier circuit is, the higher the charging power supply voltage of the trigger voltage charging circuit is, on the contrary, the lower the alternating current input voltage value of the semi-controllable bridge rectifier circuit is, the lower the charging power supply voltage of the trigger voltage charging circuit is, when the trigger voltage charging circuit is charged to be larger than the trigger voltage threshold value, the electronic switch in the voltage stabilizing trigger circuit is switched off to close the output trigger voltage, and the first unidirectional silicon controlled rectifier Q1 and the second unidirectional silicon controlled rectifier Q2 are cut off, the semi-controllable bridge rectifier circuit has no output direct current voltage. The voltage stabilization trigger circuit can be realized by circuits with different forms, such as a singlechip integrated circuit matched with a voltage sampling unit.

In this embodiment, the voltage stabilizing trigger circuit includes a switching triode Q3, a threshold voltage regulator tube D5 and a charging capacitor C1, the switching triode Q3 is NPN type, an emitter of the switching triode Q3 is connected to a trigger of a first unidirectional thyristor Q1 and a trigger of a second unidirectional thyristor Q2 through a first isolating diode D1 and a second isolating diode D2, a first current limiting resistor R1 and a second current limiting resistor R2 are connected between the trigger and a negative electrode of the first unidirectional thyristor Q1 and the second unidirectional thyristor Q2, the threshold voltage regulator tube D5 is connected between a base of the switching triode Q3 and a negative electrode output end of a semi-controllable bridge rectifier circuit, a voltage stabilizing value of the threshold voltage regulator tube D5 is determined according to a set trickle charging current value and a stator winding output voltage, the charging capacitor C1 is connected between a collector of the switching triode Q3 and the negative electrode output end of the semi-controllable bridge rectifier circuit, a cross-over resistor R3 is connected between the collector and the base of the switching triode Q3, and two alternating current input ends AC1 and AC2 of the semi-controllable bridge rectifying circuit are respectively connected with the collector of the switching triode Q3 through a first charging diode and a second charging diode to form the trigger voltage charging circuit.

Claims (2)

1. The utility model provides a quick charging circuit of variable frequency generator lithium cell which characterized in that: the voltage stabilizing trigger circuit comprises a semi-controllable bridge rectifier circuit and a voltage stabilizing trigger circuit, wherein the semi-controllable bridge rectifier circuit consists of a first rectifier diode, a second rectifier diode, a first unidirectional silicon controlled rectifier and a second unidirectional silicon controlled rectifier; the voltage stabilization trigger circuit comprises an electronic switch with a trigger voltage threshold value and a trigger voltage charging circuit, wherein a charging power supply of the trigger voltage charging circuit is in positive correlation with an alternating current input voltage value of the semi-controllable bridge rectifier circuit, when the trigger voltage charging circuit is charged to a voltage value larger than the trigger voltage threshold value, the electronic switch in the voltage stabilization trigger circuit is disconnected, the output trigger voltage is closed, the first unidirectional silicon controlled rectifier and the second unidirectional silicon controlled rectifier are cut off, and the semi-controllable bridge rectifier circuit does not output direct current voltage.

2. The circuit of claim 1 for rapidly charging a lithium battery of a variable frequency generator, wherein: the voltage-stabilizing trigger circuit comprises a switch triode, a threshold voltage regulator tube and a charging capacitor, wherein the switch triode forms an electronic switch, the switch triode is of an NPN type, an emitting electrode of the switch triode is respectively connected with a trigger electrode of a first unidirectional silicon controlled rectifier and a trigger electrode of a second unidirectional silicon controlled rectifier through a first isolating diode and a second isolating diode, a first current-limiting resistor and a second current-limiting resistor are respectively connected between the trigger electrode and a negative electrode on the first unidirectional silicon controlled rectifier and the second unidirectional silicon controlled rectifier, the threshold voltage regulator tube is connected between a base electrode of the switch triode and a negative electrode output end of a semi-controllable bridge rectifier circuit, the charging capacitor is connected between a collector electrode of the switch triode and a negative electrode output end of the semi-controllable bridge rectifier circuit, a bridging resistor is connected between the collector electrode and the base electrode of the switch triode, and two alternating current input ends of the semi-controllable bridge rectifier circuit are respectively connected with a The pole connections constitute the trigger voltage charging circuit.