CN2278299Y

CN2278299Y - Automatic charging battery circuit for mobile phone

Info

Publication number: CN2278299Y
Application number: CN 96219238
Authority: CN
Inventors: 刘振山; 盛赵斌; 周岳健
Original assignee: Jinyuan Datong Electromechanical Tech Co Ltd Beijing
Current assignee: Jinyuan Datong Electromechanical Tech Co Ltd Beijing
Priority date: 1996-09-27
Filing date: 1996-09-27
Publication date: 1998-04-08
Anticipated expiration: 2006-09-27

Abstract

The utility model relates to an automatic charging battery circuit for mobile phones, which is composed of a charging circuit which comprises a pulse current source, a rectifying bridge stack, an adjuster for pulse interval time, etc., a charging battery, a negative pulse discharging loop, an electronic switch, a voltage reference and comparison circuit, an alarm circuit, an isolation switch, etc. The utility model is small in volume and stable and reliable in electrical property, and the utility model can adjust the charging parameters according to the property of the battery to achieve the optimal cooperation of the battery and a charger to maintain the normal service life of the battery. The battery made by the utility model can be charged by an external charger and can also be charged by the battery self, and thus the battery facilitates business trips and portable carrying.

Description

Mobile phone self-charging battery circuit

The utility model relates to a kind of mobile phone self-charging battery circuit.

Present battery of mobile phone, be 1 year to 2 years the useful life under the normal condition, but because of the difference on the battery of mobile phone characteristic, after adopting the universal charger charging, the life-span of part battery of mobile phone can reduce to half a year even three months, and this makes troubles and loss economically for undoubtedly the user of mobile phone.Traditional battery of mobile phone all adopts direct charging modes simultaneously, whether battery is full of and can't judges, also just more have no idea to take appropriate measures, in a single day battery is full of and does not cut off charge power supply, time is long slightly, harm to battery is very big, can directly influence the useful life of rechargeable battery.

The purpose of this utility model is a kind of pulse current charge of using of design, can point out the mobile phone self-charging battery circuit that circuit is simple and reliable, with low cost after being full of by alarm.

The purpose of this utility model realizes by following scheme: mobile phone self-charging battery circuit is by comprising that charging circuit that pulse current source, rectifier bridge heap, interpulse period adjuster etc. is formed and rechargeable battery, negative pulse discharge loop, electronic switch, voltage reference and comparison circuit, warning circuit, isolating switch etc. form.Described electronic switch connects voltage reference and comparison circuit, negative pulse discharge loop and warning circuit; And the input of voltage reference and comparison circuit connects charging circuit and rechargeable battery, and its output connects the negative pulse discharge loop; The output of negative pulse discharge loop is connected with the input of voltage reference and comparison circuit again.

Mobile phone self-charging battery circuit can be assembled on the micro-printed circuit board and be made of one with battery of mobile phone.Its volume is small, and electric performance stablity, reliable can be regulated charge parameter according to the characteristic of battery, makes battery and charger reach best fit, to keep battery normal useful life.Use the battery of this circuit production both can charge, also can charge, thereby can conveniently go on business and carry by battery itself by external charger.The pressurizer that has adopted reference voltage in the circuit is as voltage detector component, and circuit is simple, is easy to miniaturization.

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

Fig. 2 is the utility model electrical schematic diagram;

Specify as follows below in conjunction with drawings and Examples:

By Fig. 1 and Fig. 2 as can be known, mobile phone self-charging battery circuit is by comprising that charging circuit that pulse current source, rectifier bridge heap, interpulse period adjuster etc. is formed and rechargeable battery, negative pulse discharge loop, electronic switch, voltage reference and comparison circuit, warning circuit, isolating switch etc. form.

The ac input end of this circuit is connected with overvoltage protector RV, and the protector two ends are connected with the starting flow restricter that the pulse current source be made up of C1, R1 and resistance R 2 are constituted respectively.Adjuster D2 interpulse period that the output of pulse current source is connected in series rectifier bridge heap D1 and is made up of triode.Above-mentioned pulse current source, rectifier bridge heap, interpulse period, adjuster constituted charging circuit.The output of this charging circuit connects rechargeable battery E and voltage reference and comparison circuit.Voltage reference and comparison circuit are made up of resistance R 5, R6, R7, R9 R12 and integrated circuit D3 etc.Integrated circuit D3 (TL431) is the pressurizer of reference voltage.Input R is serially connected with resistance R 6 and thermistor R5, and output K then connects the emitter of transistor T 1 in the electronic switching circuit by resistance R 7, and connects the base stage of transistor T 2 in the negative pulse discharge loop by resistance R 8.The negative pulse discharge loop is made up of transistor T 2 and resistance R 9, and the joint of the collector electrode of transistor T 2 and resistance R 9 also is connected with resistance R 12, the other end of R12 again with voltage reference and comparison circuit in the input R of D3 join.Described electronic switching circuit is made up of transistor T 1, resistance R 3, R4 and capacitor C 2.The collector electrode of T1 is connected with the output D of charging circuit, also is connected with emitter and the resistance R in the warning circuit 10 of T2 on its emitter.Described warning circuit is made up of resistance R 10, R11 and bi-colour LED LED.

During use, the plug of battery inserted civil power (220V) after, will cut off battery of mobile phone with the K switch 1 (K1-1, K1-2) of plug interlock and expose being connected of contact and internal charger, to guarantee user's safety.If line voltage surpasses 250V, overvoltage protector RV will move, and protection charger circuit and battery are without prejudice.R2 has limited the impulse current when this charger has just started, and the back is damaged in order to avoid battery is hit.Civil power forms the constant electric current of effective value of a pulsation behind pulse current source C1, R1, rectifier bridge heap D1, and by interpulse period adjuster D2 charge to battery E.

After the energized, electronic switch simultaneously, cuts off mains supply and is connected with the battery outer contact to voltage reference and comparison circuit, negative pulse discharge loop and warning circuit power supply, and the assurance outer contact is not with high voltage source; When rechargeable battery when power supply takes off, electronic switch disconnects, and has cut off being connected of battery and charger, with the normal use of assurance battery.

When battery E charged, the magnitude of voltage by R5, R6, R9, R12 sampling battery compared through the input of D3 and the reference voltage of D3 inside, when cell voltage does not reach set point, and the D3 conducting, charging enters supplemental stages.(magnitude of voltage of setting is to set up according to the characteristic of battery) in the present embodiment, the connecting resistance R5 of D3 input institute is a thermistor, can be used to the influence of compensate for ambient variations in temperature to battery behavior.

After the D3 conducting, output K becomes low level, makes the T2 conducting via R8, and rechargeable battery is shunted, thereby made the electric current that flows to battery reduce to floating current through T1, T2, R9.When the intermittent time of pulse arrived, D2 turn-offed, and battery has formed the negative pulse discharge through T1, T2, R9 discharge.After the T2 conducting, the voltage at R9 two ends raises, thereby has raised the voltage of D3 input, makes the conducting of D3 keep stable, and then makes the conducting of T2 keep stable, has so just guaranteed the stable of charging circuit.Bi-colour LED LED is made up of LED1 (green), LED2 (redness).During charging, electric current is lighted LED2 through T1, R12, LED2, R11, thereby it is red that LED is shown; After being full of upset, the T2 conducting, electric current is lighted LED1 through T1, T2, LED1, R11, and it is green that LED is shown.

In sum, characteristics of the present utility model are: adopt two stage charging method, use pulse current charge, Change the floating punching of negative pulse electric current after being full of over to, after being made of one with battery of mobile phone, can extend the life of a cell.

Claims

1, a kind of mobile phone self-charging battery circuit, form described electronic switch connection voltage reference and comparison circuit, negative pulse discharge loop and warning circuit by comprising charging circuit that pulse current source, rectifier bridge heap, interpulse period adjuster etc. is formed and rechargeable battery, negative pulse discharge loop, electronic switch, voltage reference and comparison circuit, warning circuit, isolating switch etc.; It is characterized in that: the input of voltage reference and comparison circuit connects charging circuit and rechargeable battery, and its output connects the negative pulse discharge loop; The output of negative pulse discharge loop is connected with the input of voltage reference and comparison circuit again.

2, mobile phone self-charging battery circuit according to claim 1, it is characterized in that: voltage reference and comparison circuit are by resistance (R5, R6, R7, R9, R12) and integrated circuit compositions such as (D3), the input R of integrated circuit (D3) is serially connected with resistance (R6) and thermistor (R5), output K then connects the emitter of transistor (T1) in the electronic switching circuit by resistance (R7), and connect the base stage of transistor (T2) in the negative pulse discharge loop by resistance (R8), the negative pulse discharge loop is made up of transistor (T2) and resistance (R9), the joint of the collector electrode of transistor (T2) and resistance (R9) also is connected with resistance (R12), the other end (R12) again with voltage reference and comparison circuit in the input R of (D3) join.

3, mobile phone self-charging battery circuit according to claim 1, it is characterized in that: described electronic switching circuit is made up of transistor (T1), resistance (R3, R4) and electric capacity (C2), (T1) collector electrode is connected with the output of charging circuit (D2), also is connected with the emitter and the resistance in the warning circuit (R10) of (T2) on its emitter.

4, mobile phone self-charging battery circuit according to claim 1 is characterized in that: described warning circuit is made up of resistance (R10, R11) and bi-colour LED LED.

5, mobile phone self-charging battery circuit according to claim 1 and 2 is characterized in that: the integrated circuit in voltage reference and the comparison circuit (D3) is TL431.