CN106712139A - Timing type N constant current charger - Google Patents

Abstract

The utility model relates to a timing type N constant current charger, belonging to the technical field of electronics. The timing type N constant current charger is formed by a load unit, a trickle resistor, a constant current charging unit, a timing ending unit, and a prompt unit. Unique double-NPN type triodes are used to form a working tube and a dormancy tube, the working tube and the dormancy tube are automatically converted into a constant current charging circuit with little possibility of damage, and the OR gate charging channel is formed for a charged battery. After matching a conversion transistor, a form of working tube and dormancy tube backup is formed. When the working tube is damaged, the dormancy tube immediately substitutes the dormancy tube, a high sensitive triode is used by the conversion tube to carry out conversion control, the precision is reliable, the constant current charging is employed, and a timing integrated circuit is used in ending to carry out precise timing. When the timing of the timing ending unit is completed, the constant current charging unit is immediately shut down, the charging is stopped, the charging process of the prompt unit indicates a branch to carry out light display of a charging process, a voice system makes a voice prompt for charging ending, and at the same time, the trickle resistor provides maintained trickle current to the charged battery.

Description

Timing N-type constant current charger

Technical field

Belong to electronic technology technical field.

Background technology

With enriching for the modern life, the species with the electrical equipment of battery is more and more, such as security personnel's equipment, digital machine machine, and mobile phone, etc., is that this also occurs in that many charger species, but it is all kinds of to lack a kind of low-carbon environment-friendly charging circuit in these species.Its meaning one is that present product, charging supervisor therein is off the loop triode that shut-off is charged, and is easily damaged, once damaging, this charger is become for rubbish.It is reported that, this failure becomes major failure point, just as this point is damaged and turns into rubbish, it is a kind of very big waste,（If going to repair, because it is related to repair cost, and user removes the cost that repair shop contacts, so people are often to lose）.Its meaning two, due in charging process, row maximum scientific charging when not charged to battery, thus influence battery capacity and life-span,（The capacity of only pipe battery is smaller, influences small, but in Low Carbon World, we should prevent from small place）, battery is prematurely easily also changed into rubbish, that is, formed and wasted, and environment is polluted.（Refuse battery has pollution to environment）.Be not carried out charging it is maximum scientific the reason for one be present product or battery to be charged only with direct current mode, without using a kind of preferable mode, such as continuous current charges；Or though constant current source charging can be used, it is also there are some conveniences using upper or scientific, etc. not enough on the line, therefore should enrich and develop.

Low-carbon environment-friendly should be picked up from drop, should be picked up from trickle, so just beneficial to the permanent progress and development of society.

The content of the invention

There is charge function to overcome existing charge prepd, but to environmentally friendly not enough weakness, there is charge function to overcome existing charge prepd, but to environmentally friendly not enough weakness, the present inventor have developed timing N-type constant current charger, it employs double NPN type triodes composition instrumentation tubes and dormancy pipe of uniqueness, instrumentation tubes turn into the constant-current charging circuit for being not easy to damage with dormancy pipe and automatic conversion, conversion between its instrumentation tubes and dormancy pipe makees conversion and control using highly sensitive triode, it is accurate reliable, it carries out precise match with timing ic and can realize that the charging of science is charged to rechargeable battery again, so as to maximized extension charger and the life-span and capacity for being electrically charged pond, realize the environmental protection of society.

The technical measures for being used are：

1st, timing N-type constant current charger is collectively constituted by load unit, trickle resistance, constant-current charge unit, timing end unit, Tip element.

Wherein：Load unit indicates protective resistance to constitute by being electrically charged pond, contact indication light pipe and contacting：Contact indication light pipe is connected on input with instruction protective resistance series connection, an end is contacted, and another termination constant-current charge unit, the positive pole for being electrically charged pond connects input, and the negative pole for being electrically charged resistance connects constant-current charge unit.

Trickle resistance is connected on and is electrically charged between the negative pole in pond and ground wire.

Constant-current charge unit is made up of charging operating circuit, dormancy fallback circuit, switching circuit.

Charging operating circuit is made up of charging valve, work current limiting series branch road, work constant current resistance, charging valve triggering resistance.

Dormancy fallback circuit is made up of dormancy pipe, backup current limiting series branch road, backup constant current resistance, dormancy pipe triggering resistance.

Switching circuit is made up of switching triode, switching triode triggering resistance, base earth resistance.

The colelctor electrode of charging valve and dormancy pipe all connects the negative pole for being electrically charged pond.

The emitter stage of charging valve connects work constant current resistance to ground wire, the base stage of charging valve and the indirect work current limiting series branch road of ground wire, the base stage of a termination charging valve of charging valve triggering resistance, the output end of timing ic in another termination timing end unit.

The emitter stage of dormancy pipe connects backup constant current resistance to ground wire, the base stage of dormancy pipe and the indirect backup current limiting series branch road of ground wire, the base stage of a termination dormancy pipe of dormancy pipe triggering resistance, the output end of timing ic in another termination timing end unit.

The emitter stage of one termination charging valve of switching triode triggering resistance, the base stage of another termination switching triode, base earth resistance is connected between the base stage of switching triode and ground wire, switches the grounded emitter line of triode, and the colelctor electrode for switching triode connects the base stage of dormancy pipe.

Timing end unit is made up of timing ic with peripheral oscillating circuit.

Peripheral oscillating circuit is made up of oscillation resistance, oscillating capacitance, protective resistance.

One end of oscillation resistance connects with one end of oscillating capacitance, protective resistance; as oscillation center point; the pin of 1 end of vibration the 1st of another termination timing ic of oscillation resistance; the pin of 2 end of vibration the 2nd of another termination timing ic of oscillating capacitance; the pin of 3 end of vibration the 3rd of another termination timing ic of protective resistance; the pin of 1 end of input the 5th of timing ic and the pin ground wire of 2 end of input the 7th of timing ic; the pin ground wire of ground terminal the 10th of timing ic, the pin of timing ic timing output the 8th is the output end of timing ic.

Cue circuit indicates branch road to constitute by phonetic system and charging process：Phonetic system is connected between input and the output end of timing ic, and charging process indicates branch route charging process indicator lamp and charging process to indicate protective resistance to be connected between the output end of timing ic and ground wire.

2nd, work current limiting series branch road and backup current limiting series branch road are formed by luminous tube and Diode series.

3rd, phonetic system by voice sheet, piezoelectric ceramic piece, help sound resistance to constitute, two leads are connect on the two poles of the earth of piezoelectric ceramic piece respectively and connect voice sheet, help sound resistance to be connected on the two poles of the earth of piezoelectric ceramic piece.

Further illustrate：

1st, operation principle explanation：

Because the triode in the constant-current charge unit in the present invention is to use NPN triode, the control with open circuit is opened as passage, so control point is to be connected to be electrically charged on the passage of the negative pole in pond and ground wire.When NPN triode is in saturation, the negative pole and ground wire for being electrically charged pond are mutually tied, and as charge tunnel, battery are charged.Otherwise when NPN triode is in cut-off, the negative pole and ground wire open circuit in pond are electrically charged, then can not produce charging major loop, then can not realize that substantial amounts of electric current charges, can only be by trickle resistance（In Fig. 23）The maintenance electric current for charging is produced to being electrically charged pond.Because break-make of the invention is in the negative pond of battery, so tiny stream resistance is connected between the negative pole of battery and ground wire.That is to say the two ends for being connected in parallel on switching tube.

When being electrically charged pond and being not in contact with, indication light pipe is contacted（In Fig. 2 2.2）Do not work, after being electrically charged pond and having contacted, contact indication light Guan Liang.

After plugging city's power supply, timing ic（In Fig. 2 9.1）, start during to chargometer, while output end output is high-order, charging process instruction branch road has electric current to pass through, and indicator lamp is bright；And charging valve in constant-current charge unit is encouraged, and as saturation state, it is grounded the negative pole for being electrically charged pond, start to be charged to being electrically charged pond.

The present invention uses constant-current charge, using timing mode complete charge.Pond particularly acid battery is electrically charged to a major class to charge, it is very good.Optimal charging current such as acid battery is the electric current of 1/10th capacity, and the charging interval is 10 hours.

In charging process, charging current is constant current, and its reason has been connected into the form of constant-current source for triode, so whole charging process is constant-current charge.

When timing in place after, timing ic（In Fig. 2 9.1）A high position for output end output is changed into low level signal, and the triode in constant-current charge unit is changed into cut-off without pumping signal from conducting.Stop charging.Because timing ic output end is low level, source current is through phonetic system（In Fig. 2 10.1）Into timing ic output end, so faint voice message can be sent.Charging process indicates branch road, and now no current will be extinguished by indicator lamp, untill this state will last till that user's taking-up is electrically charged pond.Its reason is that what timing ic was selected is cycle selection once.Its performance can be ensured by timing ic.

It should be noted that the constant-current charge unit of present invention design, includes two triodes, it is charging valve（In Fig. 2 6.1）With dormancy pipe (in Fig. 2 7.1).Although two pipes constitute the charge tunnel of OR gate to being electrically charged pond.But by the particularity of design measure, there was only charging valve energization work, and dormancy pipe usually in open-circuit condition, but once charging valve is damaged, charging dormancy pipe will automatically engage energization work.

After the battery being electrically charged charges completely, because be electrically charged between the negative pole in pond and ground being connected to trickle resistance（In Fig. 23）, thus can be to the passage over the ground of the tiny stream electric current of the maintenance needed for being electrically charged pond offer.

1st, line feature analysis：

（1）, constant-current charge unit concurrently acts as by two pipes.

The energization of constant-current charge unit and two pipes of open circuit control are NPN triodes in measure, but have been linked to be the form of constant-current source again, so two triodes inside constant-current charge unit, have served as the control function of connection and shut-off, constant-current source dual-use function have been served as again.

By charging valve is consistent with the mode of the constant current that dormancy pipe is connect, therefore it is illustrated to form the principle of constant-current source and be with the connection of charging valve：Charging valve（In Fig. 2 6.1）Emitter stage connected work constant current resistance（In Fig. 2 6.3）, form negative-feedback.Simultaneously base stage to be connected to work current limiting series branch road（In Fig. 2 6.2）, the effect of current limiting, when load current is excessive, and when having exceeded the threshold values of work current limiting series branch road, base current will be shunted, and be no longer pass through charging valve amplification, hereby it is ensured that emitter current is certain value, thus as a kind of constant-current source.Why connecting as work current limliting branch road with luminous tube and diode because luminous tube has luminous function, be conducive to adjusting.Why with a luminous tube with a Diode series the reason for be that it is 1.2 volts or so that the NP of luminous tube is saved, rather than 0.7 volt, and again plus after a diode, will be above switching triode（In Fig. 2 8.1）PN section switching triode can be made in running order.Work constant current resistance is that work constant current adjustable resistance is in series with work constant current protective resistance; work constant current adjustable resistance can be adjusted to constant current value; work constant current protective resistance is that the minimum value of adjustable resistance is limited, so as to ensure that constant current value in a constrained space.

Benefit with such circuit is that circuit is simplified, reliable, beneficial to engineering, while beneficial to cost-effective.This external application luminous tube is have light to indicate as a major reason of the current limiting device of constant current, and when the constant current resistance debugging that works is correct, the luminous tube in work current limiting series branch road glimmers or compared with light, represents that debugging is correct.Because now constriction works.Produce constant current effect.

（2）, contact display unit.

Cell contact fingers show, by contact indication light pipe（In Fig. 2 2.2）Protective resistance is indicated with contacting（In Fig. 2 2.3）Composition, when pond is electrically charged and charger has been not connected with, contact indication light pipe does not work.During contact indication light tube light, current channel is the negative pole by contact indication light pipe branch road to battery from anode.

（3）, timing end unit.

Timing end unit is made up of timing ic with peripheral oscillating circuit.

A, peripheral oscillating circuit.

The oscillation resistance that the circuit is connected by the pin of 1 end of vibration the 1st of timing ic timing ic（In Fig. 2 9.2）, the oscillating capacitance that the pin of 2 end of vibration the 2nd of timing ic is connected（In Fig. 2 9.3）, the connected protective resistance of pin of 3 end of vibration the 3rd of timing ic（In Fig. 2 9.5）Collectively constitute.

The function of the circuit can mainly enter line frequency tune, so that timing ic has the function of adjustable timing.

Produce vibration is with the principle of frequency-adjustable, and oscillation resistance and oscillating capacitance are the vibration adjustable member inside timing ic, the RC oscillating circuits of formation.Frequency-adjustable resistance in oscillation resistance forms frequency adjustment branch road with adjustable protective resistance, if the series value of the resistance of vibration two of frequency adjustment is big, the time to oscillating capacitance charge and discharge is long, then period of oscillation is more long.So the reason for resistance of frequency adjustment branch road can turn into frequency-adjustable.That is to say the reason for cycle is adjustable.Branch road is adjusted in frequency, frequency protection resistance is the limitation to frequency-adjustable resistance minimum value.

Another feature of this unit is that oscillating capacitance is employed without polar form, thus the electric leakage of electric capacity is become very little, thus vibrates very reliable, is difficult to stop polarization, while relative frequency is accurate, thus timing is accurate, meets the requirement of mill run.

B, timing ic.

The circuit is main by timing ic（In Fig. 2 9.1）Composition.According to the characteristic of the integrated circuit, the IC design is become into a cycle regularly in this measure.It is to after timing, not recycle.Two is not arrive timing to terminate, and output end is output as low level in place for its timing.To meet the recharge logic in this measure.

Because the integrated circuit is a kind of outstanding integrated circuit, so having, the outer part that turns is few, reliable, timing is long, good selective, so further improving performance of the invention.

（4）, switching circuit in constant-current charge unit, charging valve and the characteristics of dormancy pipe and explanation.

The main idea justice of A, the composition of constant-current charge unit and formation.

Tool maintenance statistics, for the triode that most fragile elements in all of charger are exactly execution Push And Release in this charge circuit.So having carried out emphasis treatment to the point in the present invention, the measure also becomes an important core of the invention.

Constant-current charge unit is mainly made up of three big circuits, is to be collectively constituted by charging operating circuit, dormancy fallback circuit, switching circuit.

Wherein charging operating circuit is by charging valve（In Fig. 2 6.1）, work current limiting series branch road（In Fig. 2 6.2）, work constant current resistance（In Fig. 2 6.3）, charging valve triggering resistance（In Fig. 2 6.5）Composition.

Dormancy fallback circuit is by dormancy pipe（In Fig. 2 7.1）, backup current limiting series branch road（In Fig. 2 7.2）, backup constant current resistance（In Fig. 2 7.3）, dormancy pipe triggering resistance（In Fig. 2 7.5）Composition.

Switching circuit is by switching triode（In Fig. 2 8.1）, switching triode triggering resistance（In Fig. 2 8.2）, base earth resistance（In Fig. 2 8.3）Composition.

A most important core during why of the invention above-mentioned three big circuit is.After its reason present invention devises such circuit, just it is in the working condition opened all the time from the charging valve at the beginning being powered, and dormancy Guan Ze is in " resting state " of open circuit, when charging valve is damaged and is stopped, charging dormancy pipe will automatically engage work, therefore greatly improve the life-span of charger.

The reason for B, generation " work and work of backup formula ", is analyzed.

Charging valve is symmetrical with the circuit of dormancy pipe, and the effect after excitation is all to make two triode saturations, when but charging valve is not damaged, emitter stage has output, so switching triode has forward bias, as saturation, so that the clamper base stage of dormancy pipe, makes the pipe be in cut-off, due to dormancy pipe collector no current, so inactivity is consumed, the state of " dormancy " is will always be in, once charging valve is damaged or performance dies down, switching triode can automatically become cut-off state, thus dormancy pipe base stage will not be clamped, and will automatically engage, and be worked instead of charging valve.

Some should additionally be illustrated, one is the life-span of triode in theory although very high, but triode production process in itself, and charger on the make to aspects such as the welding of triode the reason for, or improper factor in use, the life-span as usually making triode is challenged, and does not reach such requirement, and such automatic switchover work, exactly one kind that this triode does not reach the high life is made up.Two is, because two transistor parameters are consistent, opening state to be at during work, so the triode operation that either charges, or the work of dormancy pipe, so whole charging will not change.Three is using a pipe（Dormancy pipe in the present invention）It is dormancy shape, so the power consumption of the pipe is approximately zero, and there is very big relation in the triode life-span with its power for being consumed, so being hardly damaged, and it is more much better using simple parallel relationship connection functional reliability than with two pipes, because dormancy pipe power consumption is approximately zero.If simultaneously simply in parallel, it is necessary to take the balanced measure of two pipes, and take balanced measure, be two pipe output currents when charging normal, its output is become for a pipe output current by two tube currents after a pipe is damaged, and both have gap at performance.

Because above-mentioned reason, it is very big present invention measure meaning by the way of " work and the work of backup formula ".

C, the explanation to switching pipe.

One is why in maintenance statistics, control the Push And Release triode for charging easily bad in loop, one is larger charging current value in charge circuit the reason for important, and power consumption is big, it is fragile, in addition electric current is internally formed a kind of impact to equipment suddenly from changing to zero greatly, also form one layer of reason, and switch triode load for the base current of dormancy pipe, power consumption very little very little, so will not damage, thus will not turn into new trouble point.

Two be the charging current of charge circuit for more than 10 milliamperes, will be also more than 1A when battery capacity is big, and switch the base current of triode only below 0.5 milliampere, so influence will not be produced on constant current value.

（5）, cue circuit.

It is made up of with charging process display branch road phonetic system.

The present invention is designed with auditory tone cues, is phonetic system, as shown in Figure 3.When the circuit is serviced to fill small-capacity cells, charger can not possibly fill the large volume of sounding body of loudspeaker etc, can only be using the piezoelectric ceramic piece of sheet（In Fig. 3 10.12）, in order to lift volume, so increased at the two poles of the earth of piezoelectric ceramic piece and having welded one and having helped sound resistance（In Fig. 3 10.16）, the path as audio, can reach lifting volume purpose.In place, effect can substantially increase for debugging.

Charging process display branch route charging process indicator lamp（In Fig. 2 10.2）Protective resistance is indicated with charging process（In Fig. 2 10.3）Composition.In charging process, because timing ic output end is a high position, charging process indicator lamp is bright, phonetic system tone-off；After charging terminates, the output end of timing ic is changed into low level from a high position, so charging process indicator lamp puts out, has electric current to have auditory tone cues through the output end phonetic system pronunciation that phonetic system flows into timing ic from input.

The present invention has the advantages that prominent after implementing：

1st, it is life-span for substantially increasing charger by the present invention one, reduces the scrappage of charger, two is to realize science to being electrically charged pond to charge, and enhances maintenance, extends the life-span for being electrically charged pond, reduces scrappage.And such charging modes are employed, or even to failed chargeable battery, there is a certain degree of repair.And battery environmental pollution is relatively large.And both products, either chargeable battery, or supporting charger, all it is the commonly used species of the modern life, so two kinds of environmental protection of product can be strengthened.Environmental protection without minor matter, so the present invention has positive effect.

2nd, also there is important economic worth, for the value of common electronic product, such as charger this kind of product, under without rare first material, so first is Value of Science ＆ Technology, second is manually to add expense, 3rd cost for being only element, and the increased element of present invention institute is limited.After the present invention is implemented, can be clearly felt that one is charger life-time dilatation after user, two is to be electrically charged pond life, three is to be electrically charged tankage significant change will not occur, therefore society is bound to receive, and recognizes its scientific value, therefore this excellent product can replace the product of inferior quality.Because in the modern life, the product purpose is extremely widespread, so significant economic worth can be produced.

3rd, due to the charging modes using constant-current source, and terminate to terminate using the state for counting, many batteries can be carried out with the maintenance of science, particularly to the major class battery of acid battery etc., science charges and has a significant impact with capacity to the life-span of battery, so online also have such argument, many batteries are not damaged, but this bad saying is filled, so many senior electrical appliances, clearly propose that the charger of the battery specialty to being used charges.

4th, excellent performance of the present invention, one is that constant current value is flexibly adjustable thus suitable different species.Two is that constant current source charging can be adjusted flexibly using the time, can be adapted to it is polytype be electrically charged pond, so charging science, further increase charging performance, three is to charge with terminating rear acoustic notification, and the person of convenience uses very aspect.In addition the present invention also has charging not to be afraid of the advantages of overcharging after terminating.

5th, the connected science of each unit, and accomplished comprehensive utilization（As switching tube is integrated with constant-current source）, thus line circuit simplify, reliability it is high.Although many voice sheets, because the few circuit of element is simplified, voice sheet facet is thin, but still just installation very well.

6th, easily production, easily debugging is well suited for minuscule-type-enterprise's production.

7th, after especially with timing ic, circuit is more simplified, and using after series system, the requirement to capacity fall off is substantially reduced oscillating capacitance, be increased after helping sound resistance, and sound indicates function substantially, so the present invention is presented, effect is good, but low cost advantage.Beneficial to popularization.

Brief description of the drawings

Fig. 1 is timing N-type constant current charger unit graph of a relation.

In figure：1st, input；2nd, load unit；3rd, trickle resistance；5th, constant-current charge unit；6th, charging operating circuit；7th, dormancy fallback circuit；8th, switching circuit；9th, timing end unit；10th, Tip element.

Fig. 2 is the circuit theory diagrams of timing N-type constant current charger.

In figure：1st, input；2.1st, it is electrically charged pond；2.2nd, indication light pipe is contacted；2.3rd, contact indicates protective resistance；3rd, trickle resistance；6.1st, charging valve；6.2nd, work current limiting series branch road；6.3rd, work constant current resistance；6.5th, charging valve triggering resistance；7.1st, dormancy pipe；7.2nd, backup current limiting series branch road；7.3rd, backup constant current resistance；7.5th, dormancy pipe triggering resistance；8.1st, triode is switched；8.2nd, switching triode triggering resistance；8.3rd, base earth resistance；9.1st, timing ic；9.10th, the 10th pin of timing ic；9.11st, the 1st pin of timing ic, 9.12, the 2nd pin of timing ic；9.13rd, the 3rd pin of timing ic；9.15th, the 5th pin of timing ic；9.17th, the 7th pin of timing ic；9.18th, the 8th pin of timing ic；That is the output end of timing ic；9.2nd, oscillation resistance；9.3rd, oscillating capacitance；9.5th, protective resistance；9.6th, oscillation center point；10.1st, phonetic system；10.2nd, charging process indicator lamp；10.3rd, charging process indicates protective resistance.

Fig. 3 is phonetic system figure.

In figure：10.11st, voice sheet；10.12nd, piezoelectric ceramic piece；10.13rd, a pole of piezoelectric ceramic piece；10.15th, another pole of piezoelectric ceramic piece；10.16th, sound resistance is helped.

Fig. 4 is the fictitious load figure for detecting constant-current source.

In figure：1st, input；2.2nd, indication light pipe is contacted；2.3rd, contact indicates protective resistance；6.1st, charging valve；6.2nd, work current limiting series branch road；6.3rd, work constant current resistance；6.5th, charging valve triggering resistance；20th, the diode of fictitious load series connection；21st, the resistance of fictitious load series connection；22nd, ammeter.

Specific embodiment

Fig. 1,2,3,4 have gone out a kind of implementation product example.

First, element is selected：Integrated circuit selects CD4541, NPN triode uses 8050, voice sheet in voice body, common low species is surveyed in choosing, can only sounding just, the size of the piezoelectric ceramic piece in voice body is fixed according to fitting machine box, and diode uses face bonded type diode, adjustable resistance, with other resistor-capacitor units without particular/special requirement.

2nd, circuit board processed, welding：Circuit control panel is made by Fig. 2, by Fig. 2 schematic diagram soldered elements.

3rd, it is powered and checks and debugging.

1st, to the inspection of constant-current charge unit.Check and see Fig. 4 with test.

A, welding one fictitious load, first with 2 to 3 Diode series, then with a fixed resistance, and an adjustable resistant series.Wherein this two resistance should select high-power species.Replaced being filled rechargable battery with fictitious load, with the red pen string of the ammeter of universal meter in fictitious load, or red pen is connected on the diode cathode in fictitious load, and black pen connects diode cathode

The resistance of fictitious load is adjusted, the now written instructions of ammeter do not change.If correct, illustrate that constant-current source is working properly.

B, the value of the constant current of regulation charging valve.

The loop of dormancy pipe is disconnected, is colelctor electrode, adjust charging valve（In Fig. 2 6.1）The work constant current resistance that emitter stage is gone here and there（In Fig. 2 6.3）Value, its constant current value is met the requirements, now should also observe work current limiting series branch road（In Fig. 2 6.2）In luminous tube answer micro- aobvious light, if do not glimmered, should by work constant current resistance value increasing.

C, the value of the constant current of regulation dormancy pipe.

The loop of charging valve is disconnected, is colelctor electrode, disconnect switching triode（In 2 8.1）Colelctor electrode.Adjust backup constant current resistance（In Fig. 2 7.3）Value, its constant current value is met the requirements, now should also observe backup current limiting series branch road（In Fig. 2 7.2）Middle luminous tube answers micro- aobvious light, should otherwise increase the value of backup constant current resistance.Wherein charging valve is shall yet further be noted that simultaneously（In Fig. 2 6.1）With dormancy pipe（In Fig. 2 7.1）Constant current value should be basically identical.

2nd, to the inspection of timing end unit periphery oscillating unit.

The inspection of A, the working condition of charging process.

Oscillating capacitance is connected with the hot junction of oscillograph（In Fig. 2 9.3）One end, cold end ground connection.

Circuit periphery is simple, after having the connection using electrodeless electric capacity in addition, will not leak electricity, and after being powered up, oscillograph occurs vibration figure shows immediately.

If incorrect, it is only possible to be that element is welded to connect wrong.

The inspection of B, frequency-adjustable.

The resistance of two resistance in adjustment oscillation resistance, makes the scope of regulating frequency meet the requirement of design, and period of oscillation can be calculated with the frequency of vibration, can according to period of oscillation, and internal counter frequency dividing series, calculate the scheduled time of timing.And can be confirmed with fast debugging method.The method is to newly increase a resistance for resistance very little at oscillation resistance two ends, and now the integrated internal timing internal counter output end of timing has output quickly.

3rd, the inspection being powered to timing end unit timing circuit and debugging.

Use fast debugging method.The method is in oscillation resistance（In Fig. 2 9.2）Two ends newly increase a resistance for resistance very little, now timing ic（In figure 9.1）Internal timing internal counter output end has output quickly, and makes the integrated output end output low level of timing, now charging process indicator lamp（In Fig. 2 10.2）Put out by bright change, while phonetic system（In Fig. 2 10.1）Micro- sound will be sent.

Explanation：Principle with fast debugging method is, when and after upper new resistance small resistance, the dramatic quickening of frequency, the cycle is dramatic to shorten, thus timing ic internal counter has result to export quickly.

4th, to charging valve（In Fig. 2 6.1）Working condition inspection.

Connect fictitious load.

A, charging valve status checkout.

Property-line short circuit oscillation center point（In Fig. 2 9.6）, after energization, vibration polarization, output end output is high-order, is modeled to for charged state.Now charging valve is tested with the voltmeter of universal meter（In Fig. 2 6.1）Emitting voltage, pressure should be certain threshold voltage.

Inspection at the end of B, charging.

Use fast debugging method.The method is in oscillation resistance（In Fig. 2 9.2）Two ends newly increase a resistance for resistance very little, and the integrated timing output output of now timing is changed into low level from a high position, and plan becomes charging done state.Now charging valve is tested with the voltmeter of universal meter（In Fig. 2 6.1）Voltage, be now zero.

5th, to switching triode（In Fig. 2 8.1）Detection with debugging.

A, by timing ic（In Fig. 2 9.1）It is modeled to for charged state.It is that timing output is the high-order state for exporting.

Short circuit switching triode triggering resistance（In Fig. 2 8.2）, while short-circuit charging valve（In Fig. 2 6.1）Base stage and emitter stage, the situation that analog charge pipe is damaged, ammeter is connected in switching transistor collector loop, now switch transistor collector and answer no current, if any electric current, then should reduce base earth resistance（In Fig. 2 8.3）Resistance.Or renew triode because triode is damaged.

B, timing ic is modeled to for charged state.It is that output end is the high-order state for exporting.The collector voltage of switching triode is surveyed, 0.2 volt of saturation value is should be, if it is not, then the resistance of switching pipe base series should be reduced.

6th, charging valve and dormancy pipe are automatically switched and is checked.

The position for being electrically charged pond is connected on dummy resistance.Simulation timing ic timing output is the charged state of high-order output.

A, the voltmeter measurement dormancy pipe by universal meter（In Fig. 2 7.1）Emitter voltage, or ammeter is connected in dormancy pipe collector loop, in charging valve（In Fig. 2 6.1）Ammeter should be without instruction during work.

B, the emitter voltage by the voltmeter measurement dormancy pipe of universal meter, or ammeter is connected in dormancy pipe collector loop, the base stage and emitter stage of short-circuit charging valve,（Simulate pipe damage）, now ammeter should indicate electric current.And this value is basically identical with charging valve charging current.When instrumentation tubes are damaged, dormancy pipe has automatically engaged work for its meaning representation.

Then it is continuous mistake if it is indicated that incorrect, or dormancy pipe is damaged.

7th, after correct installation is electrically charged pond, indication light pipe is contacted（In Fig. 2 2.2）Answer light.

8th, timing ic is debugged with express method（In Fig. 2 9.1）, charging process indicator lamp at the end of timing（In Fig. 2 10.2）Put out.

9th, to the inspection and debugging of phonetic system.

Allow voice sheet（In Fig. 3 10.11）Connect with the mains, now piezoelectric electro potsherd（In Fig. 3 10.12）Meeting sounding sound, exchange helps sound resistance（In Fig. 3 10.16）Resistance, makes piezoelectric electro potsherd reach max volume.

Phonetic system is recovered into correct connection by picture 2, timing ic is debugged with express method（In Fig. 2 9.1）, at the end of timing, phonetic system will carry out voice message.

10th, to the detection of trickle current.

Ammeter is connected on trickle resistance（In Fig. 23）On branch road, trickle resistance is debugged, tiny stream electric current is meeted the requirements.

Illustrate, if being changed to high-power tubing to charging valve, the pond that is electrically charged of Large Copacity can be charged.

Claims (3)

1. timing N-type constant current charger, it is characterized in that：Collectively constituted by load unit, trickle resistance, constant-current charge unit, timing end unit, Tip element；

Wherein：Load unit indicates protective resistance to constitute by being electrically charged pond, contact indication light pipe and contacting：Contact indication light pipe is connected on input with instruction protective resistance series connection, an end is contacted, and another termination constant-current charge unit, the positive pole for being electrically charged pond connects input, and the negative pole for being electrically charged resistance connects constant-current charge unit；

Trickle resistance is connected on and is electrically charged between the negative pole in pond and ground wire；

Constant-current charge unit is made up of charging operating circuit, dormancy fallback circuit, switching circuit；

Charging operating circuit is made up of charging valve, work current limiting series branch road, work constant current resistance, charging valve triggering resistance；

Dormancy fallback circuit is made up of dormancy pipe, backup current limiting series branch road, backup constant current resistance, dormancy pipe triggering resistance；

Switching circuit is made up of switching triode, switching triode triggering resistance, base earth resistance；

The colelctor electrode of charging valve and dormancy pipe all connects the negative pole for being electrically charged pond；

The emitter stage of charging valve connects work constant current resistance to ground wire, the base stage of charging valve and the indirect work current limiting series branch road of ground wire, the base stage of a termination charging valve of charging valve triggering resistance, the output end of timing ic in another termination timing end unit；

The emitter stage of dormancy pipe connects backup constant current resistance to ground wire, the base stage of dormancy pipe and the indirect backup current limiting series branch road of ground wire, the base stage of a termination dormancy pipe of dormancy pipe triggering resistance, the output end of timing ic in another termination timing end unit；

The emitter stage of one termination charging valve of switching triode triggering resistance, the base stage of another termination switching triode, base earth resistance is connected between the base stage of switching triode and ground wire, switches the grounded emitter line of triode, and the colelctor electrode for switching triode connects the base stage of dormancy pipe；

Timing end unit is made up of timing ic with peripheral oscillating circuit；

Peripheral oscillating circuit is made up of oscillation resistance, oscillating capacitance, protective resistance；

One end of oscillation resistance connects with one end of oscillating capacitance, protective resistance; as oscillation center point; the pin of 1 end of vibration the 1st of another termination timing ic of oscillation resistance; the pin of 2 end of vibration the 2nd of another termination timing ic of oscillating capacitance; the pin of 3 end of vibration the 3rd of another termination timing ic of protective resistance; the pin of 1 end of input the 5th of timing ic and the pin ground wire of 2 end of input the 7th of timing ic; the pin ground wire of ground terminal the 10th of timing ic, the pin of timing ic timing output the 8th is the output end of timing ic；

Cue circuit indicates branch road to constitute by phonetic system and charging process：Phonetic system is connected between input and the output end of timing ic, and charging process indicates branch route charging process indicator lamp and charging process to indicate protective resistance to be connected between the output end of timing ic and ground wire.

2. timing N-type constant current charger according to claim 1, it is characterized in that：Work current limiting series branch road and backup current limiting series branch road are formed with Diode series by luminous tube.

3. timing N-type constant current charger according to claim 1, it is characterized in that：Phonetic system by voice sheet, piezoelectric ceramic piece, help sound resistance to constitute, two leads are connect on the two poles of the earth of piezoelectric ceramic piece respectively and connect voice sheet, help sound resistance to be connected on the two poles of the earth of piezoelectric ceramic piece.