CN2098113U - Quick charger for accumulator - Google Patents

Abstract

The quick charger for the storage battery consists of a power supply circuit, an oscillation circuit, a charging circuit and a detection display circuit. The utility model discloses the improvement lies in by the positive and negative pulse signal direct control that oscillating circuit produced to the battery charge and discharge, fills, discharges and adopts compound pipe, and discharge time is controllable, and discharge intensity can be strengthened along with the rising of rechargeable battery voltage in step. The charger circuit has the advantages of simple structure, few elements, low cost, quick charging time, 15-20 minutes for charging the nickel-cadmium battery, and remarkable depolarization and activation performance.

Description

Fast storage battery charger

The utility model belongs to electric energy storage system, particularly a kind ofly relates to the equipment that boost battery charge is used.

At present, about the technology of charge in batteries and quick charge and technical products existing a lot, as CN88221050.5, CN89203983.3, CN89209038.3, the BCll charger of product such as KENWOOD company and the various small chargers of using for flashlight, shaver battery charge.

Their common problems that exists are: all use alternating current work, do not consider the situation of charged with direct current, certain limitation is arranged; Charging interval is long.Commonly be charged as 14 hours, quick charge 5～7 hours, the product of Kenwood Corporation is one hour, the quick Ni-Cd battery charger that also has is 35～40 minutes; Moreover, fill the circuit complexity of employing soon, the debugging trouble, cost is still high.

The purpose of this utility model is will provide a kind of can improve battery fast charger above-mentioned weak point, that the better depolarising strength of discharge of performance can change synchronously with cell voltage.

The technical solution of the utility model provides in such a way: battery fast charger is mainly by power circuit, oscillating circuit, and charging circuit detects display circuit and general device hardware is formed.Power circuit comprises the AC transformer coupling circuit, bridge rectifier, three parts of filter regulator circuit.When adopting DC charging, power circuit can be directly with the input circuit in the bridge rectifier, two parts of voltage stabilizing circuit.Power circuit also can adopt the mode of AC/DC.The utility model adopts pulse current charge and discharge mode, and the charging interval, strength of discharge was controlled more than or equal to discharge time.It is characterized in that being used to controlling the oscillating circuit of the multivibrator in charging interval, its output is connected with the base stage of compound charging valve, and the required charging voltage of rechargeable battery picks out from compound charging valve emitter; The negative pulse depolarization circuit that constitutes by voltage comparator, the output of its input cathode and multivibrator joins, the base stage of its output and compound discharge tube is joined, and the collector electrode of compound discharge tube and the emitter of compound charging valve join and be access to the positive pole that is recharged the pond; Also do not have negative pulse depolarising intensity synchronization control circuit, the transistor base voltage that starts to control making usefulness is from picking out with the emitter resistance dividing potential drop that is recharged battery parallel resistor or compound charging valve, and its emitter is connected on the base stage of compound discharge tube.Along with the rising of charged battery voltage, the depolarising discharging current strengthens automatically.

Good effect of the present utility model is:

1, adopt the nonpolarity input circuit of bridge-type, need not consider the polarity of DC power supply, can operate as normal as long as connect.Be specially adapted to utilize DC power supply peculiar to vessel (as 18～32V DC power supply) to carry out charging work.

2, the activation repairing performance is better.Routine is thought that written-off nickel-cadmium cell often can implement activation and remedy.Once about 0.1 volt nickel-cadmium cell had been implemented the charging activation experiment in (thoroughly except the Gan He battery) practice, and made it to recover to use.

3, the charging interval is short.To M780, M880, the charging of nickel-cadmium cell pieces such as C150 only needs 15～20 minutes.

4, circuit is simple, debugging is convenient, and with low cost, cost can drop to below 50 yuan.

5, add the charged state change-over circuit after, can be transformed into trickle charge automatically from charging normal, reduce hardship on duty, and the trickle charge of long period does not have harmful effect to battery life.

The circuit of this charger behind the increasing charge and discharge electric current, is suitable for the usefulness to the charging of a plumbous sour battery through increasing components and parts power equally.

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

Fig. 1 is circuit theory diagrams

Fig. 2 is the power circuit of AC and DC dual-purpose charger.

Fig. 3 is the nonpolarity power supply input circuit of direct current bridge-type

Fig. 4 is the charging and discharging oscillogram

Referring to Fig. 1, by AC transformer, bridge rectifier and capacitor C₁, resistance R₁, luminous tube D₁The power supply input circuit of forming.C₁Be filter capacitor, R₁, D₁Form display circuit, BX is a fuse.Alternating current just obtains an operating voltage for back level use at 2 after through transformer step-down, rectification between B, C.One the tunnel for charging usefulness, leads up to three terminal regulator IC₁Voltage stabilizing, the usefulness of power supply road work.

Voltage comparator ic_2AAnd capacitor C₂Resistance R₂, R₃, R₄, R₅, R₆Form multivibrator.When electric current passes through resistance R₂To capacitor C₂During charging, after the arrival certain voltage value, comparator overturns immediately, C₂Begin discharge, during to certain value, comparator overturns again, forms a series of oscillating impulse outputs.

Charge circuit is by compound charging valve BG₁,₂Resistance R₈, R₉, R, luminous tube D₂Form.Selecting multiple tube for use is to export in order to obtain bigger pulse current, and R is a current-limiting resistance, R, and D₂Form charging indication.R₈Be the voltage negative feedback resistance, in order to the constant charge electric current, charging voltage is from compound charging valve BG₁,₂Emitter draw.

The negative pulse depolarization circuit is by comparator IC_2B, resistance R₁₀, R₁₁, R₁₂, R₁₆, adjustable resistance W₁, divider resistance R₁₇, R₁₈, temperature compensated diode D₂, D₃, BG₃,₄Form.Comparator IC_2BThe output of anti-phase termination multivibrator, set its in-phase end reference voltage value such as 0.25V, when then the output of the output of multivibrator is lower than reference voltage, comparator IC_2BThe output high level makes compound discharge tube conducting and discharges, and reaches unpolarized purpose.Otherwise because of output low level, pipe is by stopping discharge.

The control of depolarising intensity is born by control valve BG, and its emitter is connected on compound discharge tube BG₃,₄Base stage on, control valve BG₅Base voltage be taken from adjustable resistance W₁, because W₁On voltage raise with the rising that is recharged cell voltage, cause control valve BG₅Output current also increase and then compound discharge tube BG thereupon₃,₄The discharging current of output also increases synchronously, thereby the depolarising strength of discharge has obtained Synchronization Control.Practice shows that this effect to unpolarizing is fairly obvious.

The setting of charged state automatic switching circuit is for further full charge tankage.Also be for convenience simultaneously, save work on duty.This circuit is mainly by thyratron K_P, relay J and adjustable resistance W form wherein W₂Be to preset the charging voltage adjustable resistance, with to be recharged battery in parallel, R₁₉, R₂₀Be divider resistance, can be considered the part in the adjustable resistance, thyratron K_PThe conducting (for 1.25 times of rated voltage) that when being charged to predetermined voltage, is triggered, the relay J adhesive, thus disconnect J₁, J closes₂Enter the trickle charge state, trickle charge does not have harmful effect to the rechargeable battery life-span, D₈Be continued flow tube, R₁₄Be current-limiting resistance, R₁₅, D₅Usefulness for the trickle charge demonstration.W₃, R₂₁, R₂₂For setting charging voltage R is set₂₃, R₂₄, D₆, D₇In order to display setting voltage.

In the course of the work, alternating current is through transformer step-down, bridge rectifier, C₁Filtering and IC₁Voltage stabilizing obtains a burning voltage, has formed impulse waveform as shown in Figure 4 through multi-resonant oscillating circuit again, when being output as high level, compound charging valve charges to battery, during low level, and then compound discharge tube conducting, rechargeable battery is carried out the depolarising discharge, and by transistor BG₅Discharging current is carried out control synchronously automatically, and when rechargeable battery was charged to rated value, the relay J action made J₁From J₂Close the trickle charge state that enters, this state allows the long period to keep, and finishes up to battery charge.

Fig. 2 has represented the composition and the wiring situation of AC/DC charger circuit.

External AC by bridge heap Q rectification, is access to the main circuit of charging from 1,2 accesses by 2 (see figure 1)s of B, C after the power transformer step-down.

External direct current inserts frompositive limit 3, negative pole point 4 respectively, because power transformer primary coil open circuit, diode is in reverse blocking state in the secondary coil loop, can not form path, thus unaffected, can also increase K in case of necessity_1-1Switch is taken into account simultaneously the break-make interlock of external circuit is controlled, and the energising indication is by the R in the main circuit₁, D₁Show.

Fig. 3 represents the wiring situation of DC charging.

In this circuit, because the utilization of bridge heap, the positive-negative polarity of input is to not influence of output, and behind the heap of passing a bridge, its output B point is permanent in just, and C point perseverance is to bear, the connection of back and Fig. 1,2 identical.Dc charging circuit is omitted by common bridge rectifier that the nonpolarity direct-flow input circuit of resulting bridge-type is formed behind transformer and the corresponding filter element.

Fig. 4 is for discharging and recharging timing waveform, and the current strength that discharges and recharges, time can be adjusted and set in advance.

Claims (3)

1, a kind of battery fast charger mainly is made up of power circuit, oscillating circuit, charging circuit, detection display circuit and device hardware, it is characterized in that:

A) be used to control the multivibrator in charging interval, its output and compound charging valve (BG_1,2) base stage join, rechargeable battery is attempted by on the emitter of compound charging valve;

B) the negative pulse depolarization circuit that mainly constitutes by voltage comparator, its output and compound discharge tube (BG_3,4) base stage be connected compound discharge tube (BG_3,4) collector electrode and compound charging valve (BG_1,2) emitter be connected voltage comparator (IC with the positive pole that is recharged battery₂B) negative pole and (IC₂A) output connects;

C) also be provided with negative pulse and remove levelization intensity synchronization control circuit, start to control the transistor (BG that makes usefulness₅) its emission is connected on compound discharge and (BG mutually_3,4) base stage on, transistor (BG₅) base voltage from adjustable resistance (W₁) dividing potential drop picks out adjustable resistance (W₁) with to be recharged battery in parallel, along with the rising of charged battery voltage, the depolarising discharging current strengthens automatically.

2, charger according to claim 1, it is characterized in that said power circuit, dc charging circuit is wherein omitted by common bridge rectifier that the nonpolarity direct-flow input circuit of resulting bridge-type is formed behind transformer and the corresponding filter element.

3, charger according to claim 1 is characterized in that the output of pulse current charge circuit also is provided with mainly by thyratron (K_P) and the charged state change-over circuit formed of relay (J), wherein set charging voltage and the divider resistance (W of control voltage pick-up is provided₂) with to be recharged battery in parallel.

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