CN2336507Y

CN2336507Y - Multipurpose charger

Info

Publication number: CN2336507Y
Application number: CN98203119U
Authority: CN
Inventors: 丁建民
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-03
Filing date: 1998-04-03
Publication date: 1999-09-01
Anticipated expiration: 2008-04-03

Abstract

The utility model discloses a household minitype charger, namely a multipurpose charger, comprising a transformer and a rectifier. The output via of the rectifier is connected with an LED by a current-limiting resistor. The base electrode of the transistor is connected between a luminotron and the resistor. The other output via of the rectifier is connected with the collecting electrode of the transistor by the resistor. Both ends of the resistor The emitting electrode of the transistor is connected with a charging electrode. The utility model can be used for charging various batteries. The household minitype charger is provided with the functions that charging electric current can self controlled and self stop when electricity is full. The household minitype charger can not break the structure of the battery and can extend the service life of the rechargeable battery. A common battery can also be charged and discharged about 10-50 times.

Description

Use charger more

The utility model relates to a kind of household batteries charging device.

Charger is a kind of family expenses small electric apparatus commonly used, is used for the reduction of charging of cadmium-nickel rechargeable battery is made its energy storage once more, thereby reaches the purpose of repeatedly using repeatedly.The structure of existing charger includes transformer and rectifier, and the output of rectifier connects charge circuit and indicating circuit etc.When to 1.5 volts battery charge, charger generally will have the charging voltage of 4.5-6 volt at least, crosses lowly then can't charge.Under this charging voltage, the peak value charging voltage of charger is then higher, and can produce destruction to the chemical constitution of inside battery, and the internal resistance of cell is increased, and it is serious to generate heat during charging, and stored energy capacitance reduces.If the charging interval is long, also can make battery produce polarization phenomena, cause the damage of rechargeable battery and scrap.Therefore will there be certain restriction in the charging interval of charger, and charger itself does not have the function of automatically shutting down, and needs manual time-keeping and cuts off the electricity supply.For common zinc-manganese battery or alkaline battery, then often indicate and forbid the caution printed words that charge in its outside.This is that internal resistance is bigger because this class battery is compared with rechargeable battery, after the charging voltage that adds the 4.5-6 volt, battery is sharply heated up, and inner battery is stuck with paste volumetric expansion, thereby the phenomenon of leakage or blast takes place, and battery is scrapped and contaminated environment.Therefore charging is an absolute prohibition to common batteries with existing charger.

The purpose of this utility model just provides a kind of battery structure, and many chargers of use that can all can charge to all kinds of batteries of not destroying, and this charger also has the function of automatically shutting down simultaneously, make charge safe and reliable.

The utility model is achieved in that charger still includes transformer M and rectifier D1, D2, the output terminals A one tunnel of rectifier is through current-limiting resistance R2 sending and receiving optical diode LED2, the base stage of triode T is connected to the Node B between R2 and the LED2, another road of rectifier output end connects the collector electrode of triode T through resistance R 3, be parallel with the charging indication that a route current-limiting resistance R1 and LED 1 compose in series at the two ends of R3, the emitter of triode T connects the positive pole of charging electrode, the minus earth line.Key point of the present utility model is as current amplifier battery to be carried out large current charge with triode T, thereby changed the traditional mode that charges by force with high voltage, the switch conduction control of triode T is what to be realized by the LED 2 that is connected to the transistor base loop.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is an electrical block diagram of the present utility model.

As shown in the figure, the transformer M of this charger is former can to connect 220 volts of alternating currents by plug, and the side that pays of transformer connects the full-wave rectifier of being made up of diode D1, D2, pays the centre cap earth connection of side.Rectifier output end A point one tunnel is through current-limiting resistance R2 sending and receiving optical diode LED2, and earth connection constitutes power indicating circuit then.After the charger energising, this luminous tube is lighted at once.The second tunnel of rectifier output is connected to the collector electrode of triode T through resistance R 3, the base stage of triode is connected to resistance R 2 and the middle Node B of luminous tube LED2 in the power indicating circuit, the emitter output of triode T connects the positive pole of charging electrode, the minus earth line of charging electrode.Resistance R 3 two ends at charging circuit are parallel with charging indication, and this circuit is composed in series by current-limiting resistance R1 and LED 1.When triode T conducting was charged, luminous tube LED1 lighted; If triode T ends, then this luminous tube extinguishes simultaneously.

As main charge member, but the work of triode then is subjected to core parts LED 2 controls of this charger to this charger with triode T.Select the resistance of suitable resistance R 2, the forward voltage drop that makes LED2 is 1.9 volts, because the distinctive volt-ampere characteristic of luminous tube, when the rectifier output voltage surpassed 1.9 volts, the forward voltage drop of luminous tube also only slightly rose, and can reach 1.95 volts.Like this, 1.9 volts voltages are added to the base stage of triode T,, can reach the charging voltage of 1.5 volts of outputs through 0.4 volt of pressure drop of triode b-e interpolar.And when the voltage of battery was charged to 1.5 volts, triode T turn-offed voluntarily, and LED1 extinguishes, and charging finishes.

Putting into a batteries only between two charging electrodes in this charger charge circuit charges, for improving service efficiency, simultaneously multiple batteries is charged, should between A, the B of charger, be parallel with charging and indicating circuit more than at least one group at 2, i.e. other circuit structure parts except that transformer M, rectifier D1, D2 and LED 2, can be made into identical 2-4, be connected in parallel on A, B 2 points again, promptly can be made into the charger that 2-4 battery can charge simultaneously.

The utility model is to utilize the amplification of triode to electric current, utilizes small change in voltage, and big charging current is provided, thereby has realized the ideal charging mode of battery under the low-voltage and high-current state.Under this charged state, not only can protect its internal structure not to be destroyed effectively to rechargeable battery, energy storage capacity increases; and for all kinds of common batteries, because charging voltage is low, the battery heating is little; battery can not take place stick with paste swelling, so can charge effectively yet.Use and test through actual, after the common batteries charging, its energy storage capacity can meet or exceed the energy storage capacity of this battery when dispatching from the factory.This charger automatically shut down function, make that also charging operations is easy, needn't timing, accident does not meet accident.

The utility model is a kind of chargers of using that can be applicable to all kinds battery more; have charging current and control and be full of the function of automatic stop automatically; and perfect safeguard measure arranged; battery is not produced any destruction; can prolong useful life of rechargeable battery effectively than other chargers, also can charge and discharge 10-50 time repeatedly common batteries.

Claims

1, a kind of charger of using more, include transformer M and rectifier D1, D2, the output terminals A one tunnel that it is characterized in that rectifier is through current-limiting resistance R2 sending and receiving optical diode LBD2, the base stage of triode T is connected to the Node B between R2 and the LED2, another road of rectifier output end connects the collector electrode of triode T through resistance R 3, be parallel with the charging indication that a route current-limiting resistance R1 and LED 1 compose in series at the two ends of R3, the emitter of triode T connects the positive pole of charging electrode, the minus earth line.