CN2182487Y

CN2182487Y - Fully-automatic charger

Info

Publication number: CN2182487Y
Application number: CN 94200036
Authority: CN
Inventors: 王云光
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-03
Filing date: 1994-01-03
Publication date: 1994-11-09
Anticipated expiration: 2004-01-03

Abstract

The utility model relates to a fully-automatic charger, which is formed by the connection of a power circuit, a display circuit, a constant current source circuit, an automatic charge circuit and constant voltage circuits with automatic control charge control in two stages. The charger has the functions of arbitrary charging parameter regulation, constant current, constant voltage and automatic charge. When the utility model is used, two charging stages can be automatically switched, and pulsation charging with low current even a micro current can be automatically switched when the charging time is long. The supplement frequency and the current amplitude of the utility model can be automatically changed following the state of a storage battery, and the charging quality of the storage battery can be assured. The utility model is suitable for charging requirements of all storage batteries.

Description

Fully-automatic charger

The utility model relates to a kind of charger, is applicable to the charging to the storage battery of all kinds, specification and user mode.

At present, the charging process of nearly all lead acid accumulator is divided into two stages carries out, and needs manually observe at any time the proportion of voltage, electric current and electrolyte.Maintenance free cell is totally-enclosed battery, and the proportion of electrolyte is energy measurement not.Therefore, often be not that " overcharging " is exactly: " owing to fill ", overcharge or fill the not enough quality that all can influence storage battery shortens the life-span of storage battery greatly.

The purpose of this utility model provides a kind of charge function that not only has, and also has automatic charging, outage, and two stage automatic charge control can transfer little electric current (pulsation charging) automatically gradually to, and circuit are simple, low-cost full-automatic charging device.

The purpose of this utility model is achieved in that full-automatic charger, is connected into by power circuit, display circuit, constant-current source circuit, automatic charger, two automatic pressures of controlling charging of stages.

The utility model is compared the beneficial effect that is had with existing charger: charge parameter is appointed accent, constant current, is decided voltage, automatically charging.Two stages of charging change automatically, when charging for a long time, can transfer " pulsation is dashed " of little electric current so that little electric current automatically to.Its additional frequency and current amplitude change automatically with the state of storage battery, guarantee the charging quality of storage battery, and it is applicable to the charging requirement of all storage batterys.

The circuit diagram of Fig. 1 full-automatic charger

The outline drawing of Fig. 2 full-automatic charger

The utility model is described in further detail in conjunction with the accompanying drawings:

Full-automatic charger is connected into by power circuit, display circuit, constant-current source circuit, automatic charger, two automatic pressures of controlling charging of stages.Fig. 1 is the circuit diagram of full-automatic charger.

Power circuit is made up of fuse BX1, K switch, power transformer T and bridge heap UR.It with the alternating current 220V step-down rectifier after, supply with the required DC power supply of charging.

Display circuit: the on/off demonstration is made of light-emitting diode LD1, resistance R 1, diode D1.After K closed connection 220V AC power, LD1 lighted, the expression power connection; Charging finishes demonstration and is made of light-emitting diode LD2, resistance R 7, and after controllable silicon SCR was cut off charge circuit, LD2 lighted, and the expression charging finishes.Charging current, voltage show and are shown by ammeter A, voltmeter V.

Constant-current circuit is connected into by resistance R 2, potentiometer RP1, voltage-stabiliser tube DZ1 and field effect transistor V2.Connect the both positive and negative polarity of rectifier bridge after R2, the RP1 series connection, the mid point of RP1 and the negative terminal of DZ1 connect the grid of V2, and the anode of DZ1 connects the negative terminal of UR with after the source electrode of V2 links to each other.The anode of constant current output is drawn by the UR anode, and negative terminal is drawn by the drain electrode of V2 pipe.Adjust the grid voltage of the middle point control V2 of RP1 and control the constant current working point to reach.

Automatic charger is made up of resistance R 4, R6, capacitor C, triode V3 and unidirectional controllable silicon S CR.After R4, the C parallel connection, the base stage of the positive termination V3 of its electric capacity, the drain electrode of another termination V2 pipe, the emitter of V3 is connected with the anode of SCR, and the collector electrode of V3 connects the control utmost point of SCR and the end of R6, drain electrode and the controllable silicon SCR negative electrode of another termination V2 of R6.Through ammeter A, fuse output BX2 leads to the charger output plus terminal by the anode of UR.Lead to the negative terminal of charger output by the controllable silicon SCR anode.

Automatically charging is by triode V3, controllable silicon SCR conducting and by forming an electronic switch, control charging and stopping.Its conversion of operation state is by the base potential control of triode V3.

The pressure that two stages were controlled automatically is made up of resistance R 3, R5, potentiometer RP2, triode V1, voltage-stabiliser tube DZ2.R3 is in parallel with the emitter and collector of V1, emitter connects the anode of UR output, the base stage of triode V3 in the collector electrode of V1 and the automatic charger is connected, the DZ2 negative terminal connects the base stage of V1, the end of the positive terminating resistor R5 of DZ2, the mid point of another termination RP2 of R5, the anode of the termination bridge heap UR of RP2, the anode of another termination controllable silicon SCR.

The outline drawing of full-automatic charger such as Fig. 2.

When beginning to charge, the terminal voltage of storage battery is lower, and the mid point of potentiometer RP2 and the positive terminal potential of bridge heap UR are also lower, this voltage is added on emitter-base stage, voltage-stabiliser tube DZ2 and the resistance R 5 of triode V1, V3 conducting this moment, the controllable silicon SCR conducting, charging is normally carried out.Charging current is controlled by potentiometer RP1.Because during charge in batteries, its terminal voltage rises gradually, the mid point of RP2 is to the also proportional rising of the positive terminal potential of UR, when greater than the voltage stabilizing value of DZ2, the DZ2 disruptive conduction forms the base current of V1 pipe, V1 conducting, V3 ends, and the SCR pipe cuts off charging current, stops charging.Because the voltage-stabiliser tube reverse breakdown has a transition region, V1 pipe base current also has a process that increases gradually, so V1 guarantees adequate food and conducting, the V3 pipe by and SCR pipe cut off charging current a transient process also arranged, be that the charging current of storage battery changes the second stage that is lower than rated value automatically over to by the rated value of phase I and charges to that V1 guarantees adequate food and conducting, when V3, SCR end, stop charging.Because in the not oversize time behind the charge in batteries, its terminal voltage is slightly low, RP2 mid point to the positive terminal potential of UR also has decline slightly at this moment.If this voltage is during less than the DZ2 reverse breakdown voltage, the V1 pipe recovers to end, V3, SCR conducting, and this moment, charging was proceeded again.When storage battery, charger were in charged state for a long time, charger can change " pulsation charging " state of little electric current or little electric current automatically over to, replenishes the loss of storage battery at any time, and makes storage battery be in best accumulate state at any time.The frequency that it replenishes and current amplitude change automatically with the state of storage battery.

Claims

1, a kind of full-automatic charger, it is connected into by power circuit, charging circuit, it is characterized in that: constant-current source circuit, automatic charger, two stages are controlled the pressure of charging automatically, being connected between its each circuit and between the device of forming circuit:

Connect the both positive and negative polarity of bridge heap UR in the constant-current circuit after resistance R 2, the potentiometer RP1 series connection, the negative pole of the mid point of RP1 and voltage-stabiliser tube DZ1 connects the grid of field effect transistor V2, the negative terminal of the anode of DZ1 and the source electrode of V2 and bridge heap UR connects, the anode of constant current output is drawn by the UR anode, and negative terminal is drawn by the drain electrode of V2 pipe;

In the automatic charger after resistance R 4, the capacitor C parallel connection, the base stage of the positive termination triode V3 of its electric capacity, the drain electrode of another termination field effect transistor V2 pipe, the emitter of V3 is connected with the anode of controllable silicon SCR, the collector electrode of V3 connects the control utmost point of SCR and an end of resistance R 6, drain electrode and the controllable silicon SCR negative electrode of another termination V2 of R6 are drawn the anode that charger is exported by the anode of bridge heap UR, are drawn the negative terminal of charger output by the controllable silicon SCR anode;

Resistance R 3 is in parallel with the emitter and collector of triode V1 in the pressure of automatic control of two stages, emitter connects the anode of bridge heap UR output, the base stage of triode V3 in the collector electrode of V1 and the automatic charger is connected, voltage-stabiliser tube DZ2 negative terminal connects the base stage of V1, the end of the positive terminating resistor R5 of DZ2, the mid point of another termination RP2 of R5, the anode of the termination bridge heap UR of RP2, the anode of another termination controllable silicon SCR.