CN201130865Y - Pulse generator for intelligent accumulator test charger - Google Patents

Abstract

The utility model relates to a pulse generation device for testing the charger of the intelligent storage battery, comprising a power supply circuit, a pulse generating circuit, a pulse control circuit, a pulse driving and amplifying circuit and a pulse output circuit. The power supply circuit comprises a voltage-stabilizing integrated circuit module and an external periphery device, and provides other circuits with the working power supplies of 15V and 5V. The pulse generating circuit comprises an oscillator which can produce the pulse signal with adjustable amplitude. The pulse control circuit comprises a comparator, and two comparison signal inputs of the comparator are respectively connected with the output of the pulse signal of the pulse generating circuit and an input of the pulse control signal. The pulse driving and amplifying circuit is connected between the output of the pulse signal of the pulse control circuit and the input of the control signal of the pulse output circuit. The pulse output circuit comprises a plurality of parallel-connected high-speed switch devices and the external periphery devices. The pulse generation device has the advantages of high precision, smooth regulation, fast reaction rate, safety, reliability and stability.

Description

A kind of pulse generating unit that is used for intelligent type accumulator testing charger

Technical field

The utility model relates to a kind of pulse generating unit that is used for intelligent type accumulator testing charger.

Background technology

Storage battery provides the electrochemical appliance with store electrical energy, can be divided into acid and alkaline two kinds by chemical property, is alkaline battery as iron-nickel storage battery, and lead accumulator is an acid cell.The operation principle of common lead acid accumulator is an electrochemical reaction process.The chemical reaction that electrolyte (64% water and 36% sulfuric acid) causes occurs between the spongy pure lead of the lead oxide of positive plate and negative plate.Electrolyte also is to transport the carrier that electric current between the positive and negative pole plate flows through dividing plate.Complete storage batteries, the relative density (proportion) of electrolyte (64% water and 36% sulfuric acid) is 1.26 when 80 ℉ (26.7 ℃).Under idle state-of-charge, the positive plate goods and materials are brown lead oxide PbO2 of substantially pure, and the active goods and materials of negative plate are spongy pure plumbous Pb, and electrolyte is the mixed solution of the sulfuric acid of 64% water and 36%.When battery discharging: brown lead oxide PbO2 and the plumbous Pb on the negative plate on the positive plate become lead sulfate PbSO4 gradually; Sulfuric acid H2SO4 in the electrolyte then becomes water H2O gradually; In this course of reaction, electric charge directed movement in DC loop forms electric current.Charging process is just in time opposite with discharge process, and during charging: the lead sulfate PbSO4 on the positive and negative pole plate reverts to original PbO2 and Pb respectively; Water in the electrolyte becomes sulfuric acid H2SO4; Arrive this, pole plate and electrolyte return to their original form, and storage battery is recharged.The lead accumulator capacity specifications is that international association of storage battery (BCI) and Automotive Engineering Society are united formulation.Single lattice battery pole plates area unified specification, voltage depends on plate material and quantity, rated voltage is 2V.The current capacity constant volume of storage battery, be that it can give the index of piloting engine and starting power being provided or reserve capacity can be provided to electrical system, current capacity constant volume commonly used has ampere-hour rated value, cold-starting ability rated value, idle capacity rated value, watt-hour rated value etc.These battery ratings commonly used all need suitable instrument detecting, preferably can finish simultaneously with an instrument that can charge and can detect.

The common external fault of lead accumulator has mechanical damage, leakage, electric leakage, pole corrosion etc., general easy carries existing and gets rid of, but internal fault is difficult for discovering, and has only use and just occurs certain symptom when charging, and just be difficult for getting rid of in case produce, wish in time to find and repair by detecting.Modal internal fault mainly contains chronic polarization (sulfuration) and damages, overcharges that damage, overdischarge damage and vibrations damage etc.

The useful life of lead accumulator is by its kind and quality decision, and is also relevant with maintenance with operational environment.General common lead storage battery can be with about 2 years, and maintenance free cell and mixing accumulator can be used 4-5.Because most of lead accumulators place industrial site when using or jolt with car, operational environment is quite abominable, and initial failure and situation about losing efficacy in advance are a lot, and its maintenance and nursery work are very important.The maintenance work of lead accumulator mainly comprises projects such as checkout, boost charge and activation repairing.For a long time, the detecting instrument and the service equipment of storage battery are few, and detection and maintenance technology fall behind, and can't satisfy the needs of reasonable maintenance.So-called maintenance free cell neither be omnipotent the insurance battery, its seal degree also is different because of producer, has used several years and also can occur electrolyte minimizing, phenomenons such as polarization, crystallization later on, untimely detection and maintenance initial failure also can occur and lose efficacy, even scrap ahead of time in advance.Storage battery is several thousand yuan at most in hundreds of unit at least, scraps ahead of time and can cause huge waste, badly arbitrarily abandons if reclaim, and its electrolyte, plastic housing, metal of being corroded etc. also can bring severe contamination to environment.This phenomenon does not meet the scientific development requirement that economizes on resources and protect environment.Adopt advanced detection and charging device so press for, adhere to reasonable operation and maintenance, can prolong greatly the useful life of lead accumulator like this, some aging lead accumulators can activate to repair and continue to use.

The lead accumulator internal damage has certain reason and rule, in order to prevent inner early stage damage of lead accumulator, except will correctly using, main way is regular detection, and early prevention is in time repaired, key is to detect and recovery technique, and recovery technique needs advanced instrument and equipment to ensure again.Particularly the polarization of lead accumulator (sulfuration) problem from theory and practice, can improve useful life greatly by prevention and reparation.At present, lead accumulator detection, charging and charging method commonly used both at home and abroad probably have following several: the one, and after suction formula densimeter measurement electrolyte relative density, estimation lead accumulator degree of discharge.This method is because the density of electrolyte varies with temperature, and measured value must be converted into the value of 20 ℃ of normal temperatures, and is cumbersome, and is also accurately difficult; The 2nd, measure discharge voltage with excell tester, calculate several rated values of lead accumulator.This instrument is made up of a small resistor and a voltmeter, makes storage battery under the heavy-current discharge situation, measures its terminal voltage, its precision is limited, also do not reach constant-current discharge, even the overdischarge damage can occur, the people that the voltage that measures also will be known the business just can use very; The 3rd, during charging, thyristor silicon controlled rectifier battery charger commonly used and KGCQA type fast-pulse charger, they all are to become direct current to charge in batteries 220V alternating current step-down rectifier, can not discharge, and can only comment experience to judge whether to be full of, purposes is single, poor effect.The activation repairing technology of lead accumulator is that battery industry is desired always, but the practical problem that is met not yet so far.Activation commonly used and reparation theory have three kinds at present: the one, and the common electrical method that charges and discharge, promptly with the negative thoroughly discharge of big capacity, completely charge with big electric current again, by the activation of cycle charge-discharge realization to battery, this method is for polarizing, the battery effect that can not charge is little, and the difficult grasp of discharging current, can damage battery when excessive; The 2nd, the positive negative pulse stuffing method promptly at the positive negative pulse stuffing voltage of both positive and negative polarity loading certain frequency, is impacted two pole plates activation of battery by pulse voltage, and then is charged normal; The 3rd, positive negative pulse stuffing cycle charge discharge electrical method, promptly elder generation thoroughly discharges with the positive negative pulse stuffing constant current of certain frequency, positive negative pulse stuffing constant voltage with certain frequency completely charges again, like this one puts one fills circulation for several times, impel the coarse granule lead sulfate crystalline particle on the pole plate to melt, participate in the electrochemistry reflection again, realize the reproduction of battery the two poles of the earth function, meanwhile electrolyte also is able to balance, realizes the recovery of battery capacity fully.

In theory, the third positive negative pulse stuffing cycle charge discharge electrical method activation and repairing effect are best.But, how to use in practice, this method requires accumulator testing charger to have pulse generating unit, and this is our problem that will study and design just.

The activation and the restorative procedure of lead accumulator are varied, have occurred the storage battery activation and the prosthetic appliance of a collection of practicality, electronic load and semiconductor load efficiently in recent years.They respectively have characteristics, but limitation is also arranged: the one, and function singleness; The 2nd, do not adopt positive negative pulse stuffing to add the cycle charge-discharge double action, do not realize real constant current charge-discharge yet, limited to unpolarized storage battery activation train on, to the storage battery activation repairing scarce capacity that has polarized.

In a word, domestic and international at present detection maintenance technology and the equipment about lead accumulator also far can not satisfy the demand of producing reality, need further develop, improve.In addition, the pulse generating unit of accumulator testing charger is also had higher requirement.

Summary of the invention

The purpose that the utility model relates to is to provide a kind of pulse generating unit that is used for intelligent type accumulator testing charger.

As shown in Figure 1, the utility model is made up of power circuit 1, pulse-generating circuit 2, pulse control circuit 3, pulsed drive amplifying circuit 4 and impulse output circuit 5.Wherein:

Power circuit 1 is made of integrated regulator module and peripheral component thereof, for other each several part circuit provide 15V and 5V working power;

Pulse-generating circuit 2 comprises that can produce the oscillator that the amplitude size can be regulated suitable pulse signal;

Pulse control circuit 3 comprises a comparator, and two comparison signal inputs of this comparator link to each other with a pulse control signal input with the pulse signal output end of pulse-generating circuit 2 respectively;

Pulsed drive amplifying circuit 4 is connected between the signal input end of the pulse signal output end of pulse control circuit 3 and impulse output circuit 5;

Impulse output circuit 5 is made of a plurality of high-speed switching devices that are connected in parallel and peripheral components thereof.

Its pulse-generating circuit 2 can produce the amplitude size can regulate suitable pulse signal; Pulse control circuit 3 can carry out pulse-width regulated to the pulse signal that is used to discharge and recharge according to the pulse control signal of peripheral control unit; Pulsed drive amplifying circuit 4 can change the size of electric current, and has the precision height, regulates fine and smoothly, and the characteristics that reaction speed is fast can adapt to the control situation of real-time processing well; Impulse output circuit 5 is made of a plurality of high-speed switching devices that are connected in parallel and peripheral components thereof, and the IGBT device of employing can flow through big electric current and can not generate heat rubescent, therefore as safe as a house, reliable and stable by the characteristic of big electric current and maintenance speed-sensitive switch.

Description of drawings

Fig. 1 is the utility model schematic block circuit diagram;

Fig. 2 is the utility model circuit working figure.

Embodiment

As shown in Figure 1 and Figure 2, the utility model is made up of power circuit 1, pulse-generating circuit 2, pulse control circuit 3, pulsed drive amplifying circuit 4 and 5 five parts of impulse output circuit.Wherein:

Power circuit 1 is made of integrated regulator module and peripheral component thereof, by model is that integrated regulator module U2, the U3 of LM7805 and LM7815 is composed in series in proper order, finish voltage transformation, the 24V DC power supply is changed respectively, for other each several part circuit provide 15V and 5V working power;

Pulse-generating circuit 2 comprises an oscillator that can produce pulse signal; It is the integrated circuit U4 of LM555 by model, capacitor C1, C2, resistor R 1, R2, R3, R4, diode D1, triode Q1, Q2 constitute 555 oscillating circuits of classics jointly, can produce the pulse signal about 10KHz, the amplitude size of output pulse is regulated by the R5 precision potentiometer, suitably the size of regulation voltage amplitude;

Pulse control circuit 3 comprises a comparator, and two comparison signal inputs of this comparator link to each other with a pulse control signal input with the pulse signal output end of pulse-generating circuit 2 respectively; It is that integrated circuit U5 and the peripheral components thereof of LM393 constitutes by model, and an input of comparator is controlled voltage signal Vfd fan-out by the resistor R 8 and the pulse of peripheral control unit (DAC TLC5615) and linked to each other; By comparator LM393, compare with the size of impulse magnitude and set-point, slacken or the compensated pulse size, thereby change the pulsewidth size, play the effect of regulating impulse width, promptly change the width often of conducting electric current, realize changing size of current; This way precision height is regulated exquisiteness, and reaction speed is fast, can be good at adapting to the control situation of real-time processing.Adjusting to size of current can be controlled flexibly;

Pulsed drive amplifying circuit 4 is connected between the signal input end of the pulse signal output end of pulse control circuit 3 and impulse output circuit 5, the voltage that comparator comes out is a signal just, also there are not enough electric currents to provide, therefore drive lifting in late-class circuit, it is that 8050 triode Q3 is as driving element by model;

Impulse output circuit 5 is made of a plurality of high-speed switching devices that are connected in parallel and peripheral components thereof; It has adopted 5 IGBT high-speed switching devices that model is IRFR250, and driving pulse is directly controlled the ON time of IGBT high-speed switching devices.Thereby realize the control of size of current.IGBT is the high-power electronic load device, can flow through big electric current and can not generate heat rubescent, therefore as safe as a house, reliable and stable by the characteristic of big electric current and maintenance speed-sensitive switch.

Claims (2)

1, a kind of pulse generating unit that is used for intelligent type accumulator testing charger is characterized in that it comprises power circuit (1), pulse-generating circuit (2), pulse control circuit (3), pulsed drive amplifying circuit (4) and impulse output circuit (5).Power circuit (1) is made of integrated regulator module and peripheral component thereof, for other each several part circuit provide 15V and 5V working power; Pulse-generating circuit (2) comprises that can produce the oscillator that the amplitude size can be regulated suitable pulse signal; Pulse control circuit (3) comprises a comparator, and two comparison signal inputs of this comparator link to each other with a pulse control signal input with the pulse signal output end of pulse-generating circuit (2) respectively; Pulsed drive amplifying circuit (4) is connected between the signal input end of the pulse signal output end of pulse control circuit (3) and impulse output circuit (5); Impulse output circuit (5) is made of a plurality of high-speed switching devices that are connected in parallel and peripheral components thereof.

2, a kind of pulse generating unit that is used for intelligent type accumulator testing charger as claimed in claim 1 is characterized in that:

Described power circuit (1) is that integrated regulator module U2, the U3 of LM7805 and LM7815 composes in parallel in proper order by model, finishes voltage transformation, the 24V DC power supply is changed respectively, for other each several part circuit provide 15V and 5V working power;

Described pulse-generating circuit (2) is the integrated circuit U4 of LM555 by model, capacitor C1, C2, resistor R 1, R2, R3, R4, diode D1, triode Q1, Q2 constitute 555 oscillating circuits of classics jointly, can produce the pulse signal about 10KHz, the amplitude size of output pulse is regulated by the R5 precision potentiometer, can change the pulse voltage amplitude size;

Described pulse control circuit (3) is made of the integrated circuit U5 and the peripheral components thereof that by model are LM393, and an input of comparator links to each other with the pulse control voltage signal Vfd output of peripheral control unit (DAC TLC5615) by resistor R 8;

Described pulsed drive amplifying circuit (4) is that 8050 triode Q3 and peripheral components thereof are formed by model, as driving element;

The IGBT high-speed switching devices parallel connection that described impulse output circuit (5) is IRFR250 by 5 models constitutes.

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