CN2180022Y

CN2180022Y - Charging protector for moving telephone

Info

Publication number: CN2180022Y
Application number: CN93229867U
Authority: CN
Inventors: 许有臣; 高尚勤
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-07
Filing date: 1993-12-07
Publication date: 1994-10-19
Anticipated expiration: 2003-12-07

Abstract

The utility model discloses a charging protector for mobile phones, which matches with a random charger of mobile phones during use, and is mainly composed of a full-wave rectifying circuit, a filter circuit, an electronic switching circuit, a battery clamp voltage testing circuit and a zero-point testing circuit. The utility model can carry out charging on the battery inside the charging seat after the utility model is connected between the transformer and the charging seat of an original random charger. Every time when the alternating current reaches to zero point, the utility model carries out detection on the battery voltage. When the battery voltage is detected to reach the given voltage value, the charging stops at once. The utility model is characterized in preventing excess or insufficient battery charging, which therefore, correspondingly prolongs the service life of batteries and ensures the normal work of hosts. The utility model has the advantages of convenient use and time saving.

Description

Charging protector for moving telephone

The utility model is a kind of charging protector that is used with the mobile phone accidental charger.

At present; use the user of mobile phone that the mobile phone accidental charger is generally all used in the charging of used battery; because this charger can only be realized constant current charge; and there is not automatic protection functions; thereby often easily cause the excessive or amount of owing of battery charge; the operate as normal that makes it to reduce battery useful life or influence main frame, even may also damage main frame because of battery charge is excessive.Therefore, at present the user has to earlier battery be discharged fully to battery charge, and then routinely the time (12-14 hour) to battery charge.This charging method is not only made troubles to the user, and is simultaneously also more time-consuming, and is difficult to guarantee the accuracy of charge volume.Directly use the commercially available charger (as intelligent charger) that has automatic protection functions as the user, must with have now accidental charger give up need not, this is not only a waste, and can increase customer using cost relatively, uses also very inconvenient simultaneously.

In view of the foregoing, to provide a kind of cost low, easy to use and can prevent the mobile phone charging protector of the excessive or amount of owing of battery charge for the purpose of this utility model.

The purpose of this utility model is achieved in that it comprises full-wave rectifying circuit and the electronic switching circuit and the filter circuit that link to each other with this circuit power output, the power output end of filter circuit links to each other with the power input of battery clamp voltage testing circuit, the output control terminal of battery clamp voltage testing circuit and the output of zero-detection circuit all link to each other with the input control end of electronic switching circuit, the power output end of electronic switching circuit links to each other with the power output end of battery clamp voltage testing circuit, and the power output end of electronic switching circuit and the input of zero-detection circuit link to each other with former cradle power supply two binding posts respectively by a power supply output plug simultaneously.During use, the socket that input connected of full-wave rectifying circuit and step-down transformer (former accidental charger the with) plug that output connected links to each other, the power output end of electronic switching circuit and zero-detection circuit input by cradle in attaching plug and the former accidental charger with socket join.Begin immediately the battery in the cradle is charged,, promptly cell voltage is carried out one-time detection whenever alternating current (Rectified alternating current) during to zero point.When battery clamp voltage testing circuit detects cell voltage when reaching given magnitude of voltage (this moment battery full charge), promptly turn-off electronic switching circuit, make it to stop charging.

The utility model has the advantages that: the one, can prevent the excessive or amount of owing of battery charge, thus the operate as normal of the useful life of corresponding prolongation battery or assurance main frame; The 2nd, when charging no matter battery electric quantity what all can discard elder generation battery has been discharged fully directly to its charging, and then the method for time charging had routinely both saved time, and was convenient again, also guaranteed the accuracy of battery charge amount simultaneously effectively; The 3rd, be used with the mobile phone accidental charger, neither influence former charger performance, cost increase simultaneously is less relatively again, and uses also very convenient.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Fig. 3 is the utility model structural representation.

By accompanying drawing as can be known, the utility model mainly is made up of full-wave rectifying circuit 1, filter circuit 2, electronic switching circuit 3, battery clamp voltage testing circuit 4 and zero-detection circuit 5, wherein full-wave rectifying circuit 1 is made of diode D1-D4, will become the power input that Rectified alternating current is delivered to electronic switching circuit 3 and filter circuit 2 by the alternating current of transformer I output; Filter circuit 2 is made of diode D5, capacitor C 1, diode D5 plays buffer action, purpose is that guarantee the to flow through electric current of the input of electronic switching circuit power supply, output is a Rectified alternating current, delivers to the power input of battery clamp voltage testing circuit 4 through capacitor C 1 filtered direct current; Electronic switching circuit 3 is by resistance R 1, capacitor C 2, diode D6, D8, controllable silicon T1, T2 constitutes, when battery clamp voltage testing circuit 4 output control terminals (resistance W middle-end) output voltage lower (the battery amount of owing this moment), controllable silicon T2 ends because of the triggerless control signal, direct current by capacitor C 1 filtering is through resistance R 1, diode D6 gives the control utmost point of controllable silicon T1, make controllable silicon T1 conducting, the Rectified alternating current of full-wave rectifying circuit 1 output is delivered to the cradle II, the battery that is placed in the cradle II is charged, when battery clamp voltage testing circuit 4 output control terminal output voltages satisfy controllable silicon T2 triggering and conducting condition (this moment battery full charge), the T2 conducting, the trigger current of T1 is by the T2 short circuit, then T1 turn-offs, and stops charging; Battery clamp voltage testing circuit 4 is by resistance R 2-R4, W, diode D7 constitutes, when the moment of Rectified alternating current to zero point, through resistance R 2, diode D7 provides DC charging to the cradle II, the D point voltage is subjected to the clamper of cell voltage, because circuit impedance less (about 100 Europe) in the cradle II, so the D point voltage is through resistance R 3, W, the R4 branch is pressed in and obtains the input control end that output control voltage is delivered to electronic switching circuit 3 on the resistance W middle-end, when the D point voltage is lower than the given voltage of battery, control voltage by the output of resistance W middle-end can not trigger controllable silicon T2 conducting, then continues charging.When the D point voltage reaches the given voltage of battery, by the control voltage triggered controllable silicon T2 conducting of resistance W middle-end output, promptly turn-off electronic switching circuit 3, stop charging; Zero-detection circuit 5 is made of diode D9, triode BG, when the non-zero crossing of Rectified alternating current, triode BG conducting, the triggering signal of controllable silicon T2 is by short circuit, guarantee when the charging pulse peak value not to battery voltage detection, when Rectified alternating current during to zero point, triode BG ends, and begin cell voltage is detected this moment.

LED among Fig. 2 and resistance R 5 are the electric indicating circuit of foot, and promptly when the battery full charge, LED is lighted in controllable silicon T2 conducting.

Sequence number 10 among Fig. 3 is the housing of this charging protector; be provided with the printed substrate 7 of above-mentioned each the circuit electronic component of assembling in this housing; sequence number 6 and 9 is respectively power input socket and power supply output plug, and sequence number 8 is foot electric indicator light, i.e. a LED among Fig. 2.

Claims

1; a kind of mobile phone charging protector that is used with the mobile phone accidental charger; it is characterized in that: it comprises full-wave rectifying circuit and the electronic switching circuit and the filter circuit that link to each other with this circuit power output; the power output end of filter circuit links to each other with the power input of battery clamp voltage testing circuit; the output control terminal of battery clamp voltage testing circuit and the output of zero-detection circuit all link to each other with the input control end of electronic switching circuit; the power output end of electronic switching circuit links to each other with the power output end of battery clamp voltage testing circuit, and the power output end of electronic switching circuit and the input of zero-detection circuit link to each other with former cradle power supply two binding posts respectively by a power supply output plug simultaneously.