CN2257629Y

CN2257629Y - Intelligence quick charger for plumbous acid accumulator

Info

Publication number: CN2257629Y
Application number: CN 95237661
Authority: CN
Inventors: 唐耀庚; 高嵩
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-21
Filing date: 1995-09-21
Publication date: 1997-07-09
Anticipated expiration: 2005-09-21

Abstract

The utility model relates to an intelligent quick charger for a plumbous acid accumulator. A control circuit for charging of the utility model is composed of a rectifying transformer, a rectifying filter circuit, a detection circuit, a discharge circuit, a parameter input circuit, a display, a chopping switch for charging, a follow current circuit, and a control circuit for a single chip computer. The single chip computer can automatically control the complete process of the charge of the accumulator after treating the detecting signal of the detection circuit and parameters inputted by users through the parameter input circuit. The utility model has high quality and efficiency for charging, high speed, visual display and convenient operation. A no current test for the end voltage of the accumulator can be carried out, so that the effect of charge can be exactly judged. The utility model is suitable for charging accumulators with different types and different use conditions.

Description

The lead acid accumulator Computerized fast charger

The utility model relates to a kind of battery charging plant, particularly a kind of lead acid accumulator Computerized fast charger.

The various lead acid accumulator quick charge devices that occur in the prior art, " quick charge device " (91230198.8) as the China Patent No. bulletin, " lead accumulator quick charger " (9,221 4993.3), great majority are to adopt pulse current charge discharge depolarization quick charge technology to improve the acceptable charging current of storage battery, shorten the charging interval, but this class quick charger all is to adopt the fixed cycle discharge depolarization, charging current and depolarising parameter can only be set up in advance, be difficult to adapt to dissimilar storage batterys, the different behaviours in service of storage battery, the depolarising requirement of different phase in the battery charging process.

The purpose of this utility model is in order to overcome above-mentioned weak point, and provide a kind of charge in batteries overall process of can controlling automatically, the lead acid accumulator Computerized fast charger that all can carry out the high efficiency quick charge automatically to storage batterys dissimilar, different behaviours in service.

Lead acid accumulator Computerized fast charger of the present utility model comprises casing, rectifier transformer, current rectifying and wave filtering circuit, testing circuit, discharge circuit, parameter input circuit, display, it is characterized in that charge in addition in its charging control circuit chopping switch, freewheeling circuit and single chip machine controlling circuit.Input ac power is through the rectifier transformer step-down, behind the current rectifying and wave filtering circuit rectifying and wave-filtering, the output galvanic current is depressed into the charging chopping switch, the polarity of charging accumulator, terminal voltage, the charging current parameter is taken a sample the back output detection signal to single chip machine controlling circuit by testing circuit, the control signal of the detection signal of single chip machine controlling circuit receiving test circuit and parameter input circuit, after handling, scm software exports charging control signal respectively to the chopping switch that charges, depolarising controls signal to discharge circuit, single chip machine controlling circuit is also exported the charging average current, the charging accumulator terminal voltage, data to the display of user's input shows.The charging chopping switch is under the effect of single chip machine controlling circuit charging control signal, and to the pulse of charging accumulator output charging voltage, discharge circuit provides the depolarising discharge path for charging accumulator to the direct voltage of control current rectifying and wave filtering circuit output through freewheeling circuit.

Fig. 1 is the utility model contour structures schematic diagram;

Fig. 2 is the utility model circuit block diagram;

Fig. 3 is the utility model circuit theory diagrams;

Fig. 4 is charge in batteries, depolarising discharge current waveform schematic diagram.

Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.

The lead acid accumulator Computerized fast charger comprises casing 1, and its charging control circuit is made up of rectifier transformer 2, current rectifying and wave filtering circuit 3, charging chopping switch 4, freewheeling circuit 5, testing circuit 6, single chip machine controlling circuit 7, discharge circuit 8, parameter input circuit 9 and display 10.

Rectifier transformer 2 is step-down transformer T ₁, connect the 220V AC power after elementary serial connection fuse RD, the K switch.

Current rectifying and wave filtering circuit 3 comprises the fast N of diode rectification mould ₂, filtering capacitor C ₁, transformer T ₁Secondary ac output voltage obtains stable DC charging voltage after rectification, filtering.

Charging chopping switch 4 is by V-MOS power tube V ₁₅Constitute V ₁₅Drain electrode connects rectification filter circuit output end, and source electrode exports freewheeling circuit 5 to, and grid connects single chip machine controlling circuit 7, regulates the equal electric current of chargin level under single chip machine controlling circuit control.

Freewheeling circuit 5 is by inductance L ₁With diode V ₂₅Form L ₁One end, V ₂₅Negative pole also meets current rectifying and wave filtering circuit 3 outputs, L ₁The other end, V ₂₅Positive pole connects charging output "+" "-" end respectively, for charge pulse currents provides the afterflow path.

Testing circuit 6 comprises polarity detection circuit, voltage detecting circuit and current detection circuit.Polarity detection circuit is by photoelectrical coupler N ₁₂And resistance R ₃₅, R ₃₆Constitute N ₁₂2 pin connect charging output "+" end, 1 pin series resistor R ₃₆Back and 3 pin and ground connection, N ₁₂4 pin output to one chip microcomputer D with the charging accumulator polar signal ₁P _1.5End; Voltage detecting circuit is by resistance R ₄₁With potentiometer R ₄₂Series connection constitutes, and in parallel with the charging output, and voltage sampling signal is by R ₄₂Intermediate contact outputs to D ₁ADC ₁End; Current detection circuit is by resistance R ₃₈Constitute R ₃₈Be serially connected in N ₂Negative pole and charging output "-" end between, R ₃₈The current sampling signal of last acquisition outputs to the sampling current amplifying circuit.

Single chip machine controlling circuit 7 comprises one chip microcomputer D ₁, charging chopping switch drive circuit, discharge electronic switch drive circuit, sampling current amplifying circuit and circuit of display driving.

D ₁Adopt CMOS low-power scm 87C752, charging control program is solidificated among the inner PROM of single-chip microcomputer; Charge the chopping switch drive circuit by pulse transformer MT, triode V ₁₁, V ₁₂, V ₁₃, resistance R ₁₁, R ₁₂, R ₁₃Form, by D ₁The charging control signal of PWM end output through V ₁₁, V ₁₂After the amplification, by being connected on V ₁₂The pulse transformer MT couple drive V of collector electrode ₁₅, discharge electronic switch drive circuit is by triode V ₂₁, V ₂₂, resistance R ₂₁, R ₂₂Form, by D ₁The depolarising control signal of P0.3 end output through V ₂₁, V ₂₂Amplify rear drive V ₂₄The sampling current amplifying circuit is by operational amplifier N ₁And resistance R ₃₁, R ₃₂, R ₃₃, R ₃₄Form, by the current sampling signal of current detection circuit input through R ₃₁Input to N ₁Input 2, amplify the back by N ₁1 pin exports D to ₁ADC0 end; Circuit of display driving is by buffer D ₃(74LS245), decoder D ₂(74LS145) form, by D ₁P _3.0-P _3.7The display segments coded signal of end output is through D ₃Driving exports display 10 to, by D ₁P _0.0-P _0.2The display bit code signal of end output is through D ₂Decoding drives and exports display 10 to.

Discharge circuit 8 is by resistance R ₄₃Series connection constitutes with the V-MOS power tube, and in parallel with the charging output, and charging accumulator depolarising discharge path is provided.

Parameter input circuit 9 is by potentiometer R ₅₁, R ₅₂, R ₅₃Compose in parallel, two ends in parallel connect respectively+5V power supply and ground connection, and their intermediate contact exports D respectively to ₁ADC4, ADC2, ADC3 end.

Display 10 is made up of 8 LED charactrons.

Transformer T ₂, rectification module N ₄, three-terminal regulator block N ₅, N ₆With filtering capacitor C ₃, C ₄Be the control system working power.

After each electronic component welds, with display and potentiometer R ₅₁, R ₅₂, R ₅₃Be fixed on casing 1 front panel, charging input end and charging output are fixed on casing 1 rear board.

The operation principle of this lead acid accumulator Computerized fast charger is as follows: energized, input ac power is after rectifier transformer 2 step-downs and current rectifying and wave filtering circuit 3 rectifications, filtering, provide the charging voltage pulse by charging chopping switch 4 and freewheeling circuit 5 to charging accumulator, 8 of discharge circuits provide the depolarising discharge path for charging accumulator.Testing circuit 6 is with charging accumulator polar signal, terminal voltage, the detection signal input single chip machine controlling circuit 7 of charge parameters such as charging current, the single-chip microcomputer operation is the closed-loop control program of establishment in advance, detection signal is carried out judgment processing, regulate the average size of current of conduction ratio control charging of charging chopping switch 4, adjusting depolarising frequency is controlled the depolarising degree of discharge with each depolarising discharge time makes charging current and depolarising parameter adapt to the charging overall process automatically, controls normally carrying out of charging process automatically.Charging accumulator charging, depolarising discharge current waveform schematic diagram are as shown in Figure 4.The user can intervene charging process by parameters such as parameter input circuit 9 input charging accumulator capacity, charging most significant end voltage and maximum permission charging currents, single-chip microcomputer is adjusted charging and depolarising parameter automatically according to the data of user's input, and the data of the average current that will charge simultaneously, terminal voltage and user's input export display 10 to and show.As charging accumulator polarity wrong, single-chip microcomputer then refuses to move charging control program, and output failure code to display 10 shows; As the charging current overcurrent, charging control program then out of service immediately charging chopping switch 4 and discharge circuit 8 are turn-offed, and output failure code to display 10 shows.Single chip machine controlling circuit 7 is judged the level of charge of storage battery according to charging accumulator terminal voltage size, situation of change with to the informixs such as calculating that charge into electric weight, and the storage battery full charge is an autostop, and output is shut down code to display 10 and shown.

The utility model is owing to adopt above design, use one chip microcomputer that testing circuit is handled back control charge in batteries overall process automatically to charging accumulator capacity by the input of parameter input circuit of the detection signal of charge parameter and user, charging most significant end voltage and the maximum parameters such as charging current that allow, and by display with numeral or the code form situation that shows in various parameters and the charging process directly perceived.Single-chip microcomputer accurately is controlled at when stopping filling does not have the stream detection to accumulator voltage, can accurately judge level of charge in batteries and depolarising effect.Power consumption own is little, and is simple in structure, and cost is low, easy and simple to handle, is adapted to charge in batteries dissimilar, different behaviours in service and uses.

Claims

1, a kind of lead acid accumulator Computerized fast charger, comprise casing (1), rectifier transformer (2), current rectifying and wave filtering circuit (3), testing circuit (6), discharge circuit (8), parameter input circuit (9), display (10), it is characterized in that the chopping switch (4) that charges in addition in its charging control circuit, freewheeling circuit (5) and single chip machine controlling circuit (7), input ac power is through rectifier transformer (2) step-down, current rectifying and wave filtering circuit (3) rectification, after the filtering, the output galvanic current is depressed into charging chopping switch (4), the polarity of charging accumulator, terminal voltage, the charging current parameter is taken a sample the back output detection signal to single chip machine controlling circuit (7) by testing circuit (6), the control signal of the detection signal of single chip machine controlling circuit (7) receiving test circuit (6) and parameter input circuit (9), after handling, scm software exports charging control signal respectively to the chopping switch that charges (4), depolarising controls signal to discharge circuit (8), single chip machine controlling circuit (7) is also exported the charging average current, the charging accumulator terminal voltage, data to the display (10) of user's input shows, charging chopping switch (4) is under the effect of single chip machine controlling circuit (7) charging control signal, to the pulse of charging accumulator output charging voltage, discharge circuit (8) provides the depolarising discharge path for charging accumulator to the direct voltage of control current rectifying and wave filtering circuit (3) output through freewheeling circuit (5).