CN102468657A - Charging circuit of standby battery - Google Patents
Charging circuit of standby battery Download PDFInfo
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- CN102468657A CN102468657A CN2010105385074A CN201010538507A CN102468657A CN 102468657 A CN102468657 A CN 102468657A CN 2010105385074 A CN2010105385074 A CN 2010105385074A CN 201010538507 A CN201010538507 A CN 201010538507A CN 102468657 A CN102468657 A CN 102468657A
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- battery
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- reserve battery
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Abstract
The invention discloses a charging circuit of a standby battery, and the standby battery can be used for charging a main battery of a mobile terminal. The charging circuit of the standby battery comprises a booster circuit, a control circuit, a booster circuit controller and an enable control circuit, wherein the booster circuit is connected between the standby battery and the main battery, and is used for boosting the voltage of the standby battery to the voltage required by the main battery; and the control circuit is connected with the standby battery, the booster circuit and the main battery, is used for controlling the working state of the booster circuit according to the voltage states of the standby battery and the main battery, and outputting the working index signal. The booster circuit controller is connected with the standby battery and the booster circuit, and when the main battery is in discharge protection, the control circuit does not work and the standby battery is sufficiently charged, the booster circuit controller is used for removing a discharge protection circuit of the main battery. The enable control circuit is connected with the standby battery, the booster circuit controller and the control circuit, and is used for controlling the working state of the booster circuit controller according to the working index signal.
Description
Technical field
The invention belongs to the mobile phone energy field, be applied to solve emergency service, in the electronic product of prolongs standby time, air time.
Background technology
At the mobile phone energy field, multiple solution emergency service problem is arranged, prolong standby, the scheme of air time.When mobile phone electric weight deficiency; Carry charger or non-transformer or meet in the absence that power failure or the like can't charge out of doors; How to solve the mobile phone quantity problem immediately, use AAA reserve battery portable and that be available anywhere to give carrying out cell-phone charging is exactly one of scheme.
As shown in Figure 1, traditional AAA reserve battery charging circuit is made up of AAA reserve battery 110, booster circuit 120, control circuit 130,140 4 square frames of lithium battery.Wherein, AAA reserve battery 110 is used to produce the energy of cell-phone charging.Booster circuit 120 is used for lower direct voltage that AAA reserve battery 110 is provided, rises to the required charging voltage of lithium battery 140.Control circuit 130 not only can detect input, ensures stable input, can also lithium battery 140 voltages of output be detected, thereby ensures that lithium battery 140 can not overcharge; Simultaneously; The charge mode of the also changeable lithium battery 140 of control circuit 130, control charging current, the charge efficiency that improves; Can also detect lithium battery 140 whether by other charger charging, its voltage whether be lower than set point, whether the user requires to use above-mentioned AAA reserve battery 110 charge functions; Finally, open automatically or the charge closing function according to various result of determination and requirements set.Here, lithium battery 140 is main batterys of mobile phone, is the energy provider of cell phone system, and simultaneously, it also is used for power supply to control circuit 130 being provided.
In traditional design; In order to ensure the stability and the efficient of control circuit 130 work; When any voltage is lower than predetermined value in AAA reserve battery 110 or the lithium battery 140; Control circuit 130 is not worked, and then booster circuit 120 also can't be worked, and promptly whole charging circuit can not charge again.
If lithium battery 140 continuous discharges are to discharge prevention, the voltage of lithium battery 140 is 0V, at this moment; Control circuit 130 can not start; Booster circuit 120 also just also can't be worked so, and no matter the electric weight of AAA reserve battery 110 has muchly, all can't give lithium battery 140 chargings; The emergency service problem be can't solve, standby, air time prolonged.
Summary of the invention
In view of this, reserve battery charging circuit provided by the present invention can still can charge to said main battery with reserve battery behind portable terminal main battery discharge prevention, and is user-friendly.
Reserve battery charging circuit of the present invention comprises that the available backup battery charges for the main battery of portable terminal, and it comprises booster circuit, control circuit, booster circuit controller and enables control circuit.Wherein, booster circuit is connected between reserve battery and the main battery, is used for the needed voltage of boost in voltage to main battery with reserve battery.Control circuit connects reserve battery, booster circuit and main battery, is used for the operating state according to the voltage status control booster circuit of reserve battery and main battery, and the output services index signal.The booster circuit controller links to each other with reserve battery and booster circuit, is used for not working and reserve battery electric weight when sufficient when main battery discharge prevention, control circuit, removes the discharge protection circuit of main battery.Enable control circuit and link to each other, be used for operating state according to work index signal control booster circuit controller with reserve battery, booster circuit controller and control circuit.
Above-mentioned reserve battery charging circuit, wherein: said reserve battery is the AAA battery, and said main battery is a lithium battery.
Above-mentioned reserve battery charging circuit, wherein: said booster circuit controller is to be made up of reference voltage source, oscillating circuit, comparator, control circuit, said booster circuit controller has the pin of enabling.
Above-mentioned reserve battery charging circuit, the said control circuit that enables comprises: pull-up resistor, be connected in the positive pole of said reserve battery and enabling between the pin of booster circuit controller, be used to guarantee the operate as normal of said booster circuit controller; Electric capacity is connected in said booster circuit controller and enables between pin and the said reserve battery negative pole, and itself and said pull-up resistor constitute delay circuit, is used to guarantee the stable of said booster circuit controller operating state; Chip; Its first pin is connected in the pin that enables of said booster circuit controller; Its second pin connects the positive pole of said reserve battery, and the 3rd pin connects the negative pole of said reserve battery, and said booster circuit controller just can be worked when being used to guarantee backup battery voltage greater than preset value; And electric crystal, its control end links to each other with said control circuit, is used to receive said work index signal, and its first output connects said reserve battery negative pole, and its second output connects the Enable Pin of said booster circuit controller; Wherein, when said control circuit operate as normal, said work index signal is a high level, said electric crystal conducting, and the pin that enables of then said booster circuit controller is dragged down, so said booster circuit controller is not worked.
After reserve battery charging circuit of the present invention can solve the lithium battery discharge prevention, the booster circuit controller was removed the discharge prevention of lithium battery, made reserve battery can give the problem of lithium cell charging, and is safe and reliable, and has higher performance and efficient.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Shown in Figure 1 is the block diagram of traditional AAA reserve battery charging circuit.
Block diagram for reserve battery charging circuit among the present invention shown in Figure 2.
Shown in Figure 3 for the physical circuit figure of Fig. 2 of the present invention.
Embodiment
Shown in Figure 2 for the block diagram of reserve battery charging circuit of the present invention; It can use reserve battery 210 to charge for the main battery 240 of portable terminal, and it is by booster circuit 220, control circuit 230, booster circuit controller 250 and enable control circuit 260 and form.In this execution mode, reserve battery 210 is the AAA dry cell, in other execution modes, and also other types and the convenient battery that can get.Portable terminal main battery 240 is a lithium battery.Wherein, Among reserve battery 210, booster circuit 220, control circuit 230, lithium battery 240 function square frames and Fig. 1 in the traditional AAA reserve battery charging circuit corresponding square frame the same; Promptly; Booster circuit 220 is connected between reserve battery 210 and the lithium battery 240, is used for boost in voltage to the main battery 240 needed voltages with reserve battery 210; Control circuit connects reserve battery 210, booster circuit 220 and lithium battery 240, is used for the operating state according to the voltage status control booster circuit 220 of reserve battery 210 and lithium battery 240.
In this execution mode; Booster circuit controller 250 all links to each other with reserve battery 210, booster circuit 220, is used at lithium battery 240 during discharge prevention, by reserve battery 210 power supplies; Export a high level, remove lithium battery 240 inner discharge protection circuits and also give lithium battery 240 chargings.When the voltage at lithium battery 240 two ends was higher than the required voltage of control circuit 230, control circuit 230 was started working.Enabling control circuit 260 all links to each other with reserve battery 210, booster circuit controller 250, control circuit 230; Be used for simply enabling control, guarantee that he works under reserve battery 210 electric weight abundances and control circuit 230 idle situation to 250 1 of booster circuit controllers.
Consult Fig. 3 simultaneously, it is the physical circuit figure of Fig. 2 of the present invention.Need to prove V
ALK+Port connects the positive pole of reserve battery 210, and earth terminal T1 connects the negative pole of reserve battery 210, V
BATPort connects the positive pole of lithium battery 240, and earth terminal T2 connects the negative pole of lithium battery 240.In this execution mode, inductance L 1, diode D1, the first transistor Q1, the second electric crystal Q2 constitute booster circuit 220, and chip U1 is that reserve battery 210 is given the control chip of lithium battery 240 chargings, constitutes control circuit 230 function square frames.Capacitor C 1, C2 are V
BATThe filter capacitor of port.Resistance R 2 connects between earth terminal T1 and the T2.Chip U2 is a kind of booster circuit controller 250 function square frames that are made up of reference voltage source, oscillating circuit, comparator, control circuit etc.Resistance R 1, capacitor C 3, chip U3 and the 3rd electric crystal Q3A formation enable control circuit 260 function square frames, are used for the control that enables to booster circuit controller 250.
V
ALK+Port, inductance L 1, diode D1, the first electric crystal Q1, the second electric crystal Q2, chip U1, capacitor C 1, C2, V
BATPort is traditional reserve battery charging circuit, and it has been accomplished from reserve battery 210 boost in voltage and has outputed to lithium battery 240, and through detecting and charging with controlling and give lithium battery 240 chargings.The charging of chip U1 control lithium battery 240 whether, charge mode and charging current.When lithium battery 240 voltages are 0V, chip U1 power supply is 0V, promptly can't work.
In this execution mode; What chip U2 selected for use is the chip of S-8351A33MC model; It is a kind of CMOS booster circuit controller 250 that is made up of reference voltage source, oscillating circuit, comparator, pulse frequency modulated control circuit etc., can be according to load size automatic switchover occupation efficiency, and built-in MOSFET uses protective circuit; Meeting auto-cutout when surpassing controlling value is to prevent destruction.Therefore, can obtain the fail safe of in a big way low ripple, high efficiency and safeguards system circuit.Take all factors into consideration, function, performance, fail safe also can both reach can select other device for use.
Chip U2 and booster circuit 220 are shared V
ALK+Port, inductance L 1, diode D1, capacitor C 1, C2, V
BATPort part has been accomplished from reserve battery 210 boost in voltage output 3.3V to lithium battery 240.
First pin of chip U2 is to enable pin, and it is that high level triggers, that is, chip U2 work during high level, chip U2 does not work during low level, and like this, chip U2 can control to lithium battery 240 the output 3.3V that whether boosts.
As stated, enable control circuit 260 and comprise resistance R 1, capacitor C 3, chip U3 and the 3rd electric crystal Q3A.Resistance R 1 is the pull-up resistor that enables pin, is connected in V
ALK+Port and chip U2 enable between the pin, and to confirm all do not have under the situation of work at other control circuit, this enables pin is high level, chip U2 operate as normal.Capacitor C 3 is connected in earth terminal T1 and chip U2 enables between the pin, guarantees the stable of chip U2 operating state, and itself and resistance R 1 constitute delay circuit; When drawing on the resistance R 1; Can not let immediately enable pin and become high level, make it have a time-delay, delay time t=R1*C3; To guarantee the stable of chip U2 operating state, prevent shake.Simultaneously for after the protection that guarantees activating lithium battery 240; Can effectively give lithium battery 240 chargings; Must guarantee that the electric weight of reserve battery 210 can not be too low, activate otherwise continuous discharge prevention can appear in lithium battery 240, again discharge prevention; Activate again ... circulation, to the life-span of lithium battery 240 can be influential.
Chip U3 is high-precision voltage checking chip, and its first pin is connected in the pin that enables of chip U2, and its second pin connects V
ALK+Port, its 3rd pin connects earth terminal T1, and effect is that chip U2 just can work when guaranteeing reserve battery 210 voltages greater than certain value, and protection that just can activating lithium battery 240 also charges for lithium battery 240.
In this execution mode, we select for use chip U3 is the chip of S-80811CNPF model, and detecting voltage is 1.1V, and precision is+-2%.When reserve battery 210 voltages during greater than 1.1V, when promptly second pin of chip U3 was greater than 1.1V, chip U2 just started working, and was satisfying under the situation of its function, and chip U2 also can select other device for use.
When lithium battery 240 voltages were higher than the threshold voltage of chip U1, chip U1 promptly can work, at this moment, and by V
ALK+Port, inductance L 1, diode D1, the first electric crystal Q1, the second electric crystal Q2, resistance R 14, capacitor C 1, C2, V
BATPort is accomplished the charging work that reserve battery 210 is given lithium battery 240, and meanwhile, chip U1 can export a high level work index signal, then should close by chip U2, V
ALK+Port, inductance L 1, diode D1, resistance R 14, capacitor C 1, C2, V
BATThe output of boosting that port constitutes.Otherwise when lithium battery 240 voltages were lower than the threshold voltage of chip U1, chip U1 did not work, and chip U1 exports a low level work index signal.
In this execution mode, electric crystal Q3A control end links to each other with chip U1, is used to receive the work index signal, and its first output connects earth terminal T1, and its second output connects the Enable Pin of chip U2.When chip U1 works, the work index signal of its output high level, then electric crystal Q3A conducting, first pin of chip U2 is promptly dragged down, and chip U2 does not work, thereby guarantees to close by chip U2, V
ALK+Port, inductance L 1, diode D1, resistance R 14, capacitor C 1, C2, V
BATThe output of boosting that port constitutes.When chip U1 does not work, the work index signal of its output low level, then not conducting of electric crystal Q3A, the state of first pin of chip U2 is by resistance R 1, chip U3,3 decisions of capacitor C.Thus it is clear that, enable control circuit 260 and can guarantee that booster circuit controller 250 carries out operate as normal under control circuit 230 idle situation, thereby guarantee the operate as normal of whole charging circuit.
In sum; After reserve battery charging circuit of the present invention can solve lithium battery 240 discharge preventions, booster circuit controller 250 was removed the discharge prevention of lithium battery 240, made reserve battery 210 can give the problem of lithium battery 240 chargings; Safe and reliable, and have higher performance and efficient.
The embodiment of the above is not to limit practical implementation scope of the present invention with this for the preferred embodiments of invention, and scope of the present invention comprises and is not limited to this embodiment.All shapes according to the present invention, the equivalence variation that structure is done all comprise in protection scope of the present invention.
Claims (4)
1. reserve battery charging circuit, its available backup battery charge for the main battery of portable terminal, it is characterized in that said reserve battery charging circuit comprises:
Booster circuit is connected between said reserve battery and the main battery, is used for boost in voltage to the needed voltage of said main battery with said reserve battery;
Control circuit connects said reserve battery, booster circuit and main battery, is used for controlling according to the voltage status of said reserve battery and main battery the operating state of said booster circuit, and the output services index signal;
The booster circuit controller links to each other with said reserve battery and booster circuit, is used for not working and said reserve battery electric weight is removed its discharge protection circuit when sufficient when said control circuit; And
Enable control circuit, link to each other, be used for controlling the operating state of said booster circuit controller according to said work index signal with said reserve battery, booster circuit controller and control circuit.
2. reserve battery charging circuit as claimed in claim 1 is characterized in that, said reserve battery is the AAA battery, and said main battery is a lithium battery.
3. reserve battery charging circuit as claimed in claim 1 is characterized in that, said booster circuit controller is to be made up of reference voltage source, oscillating circuit, comparator, control circuit, and said booster circuit controller has the pin of enabling.
4. reserve battery charging circuit as claimed in claim 3 is characterized in that, the said control circuit that enables comprises:
Pull-up resistor is connected in the positive pole of said reserve battery and enabling between the pin of booster circuit controller, is used to guarantee the operate as normal of said booster circuit controller;
Electric capacity is connected in said booster circuit controller and enables between pin and the said reserve battery negative pole, and itself and said pull-up resistor constitute delay circuit, is used to guarantee the stable of said booster circuit controller operating state;
Chip; Its first pin is connected in the pin that enables of said booster circuit controller; Its second pin connects the positive pole of said reserve battery, and the 3rd pin connects the negative pole of said reserve battery, and said booster circuit controller just can be worked when being used to guarantee backup battery voltage greater than preset value; And
Electric crystal, its control end links to each other with said control circuit, is used to receive said work index signal, and its first output connects said reserve battery negative pole, and its second output connects the Enable Pin of said booster circuit controller;
Wherein, when said control circuit operate as normal, said work index signal is a high level, said electric crystal conducting, and the pin that enables of then said booster circuit controller is dragged down, so said booster circuit controller is not worked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538507.4A CN102468657B (en) | 2010-11-09 | 2010-11-09 | Charging circuit of standby battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538507.4A CN102468657B (en) | 2010-11-09 | 2010-11-09 | Charging circuit of standby battery |
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| CN102468657A true CN102468657A (en) | 2012-05-23 |
| CN102468657B CN102468657B (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010538507.4A Active CN102468657B (en) | 2010-11-09 | 2010-11-09 | Charging circuit of standby battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505551A (en) * | 2014-12-15 | 2015-04-08 | 广东欧珀移动通信有限公司 | Charging method and charging circuit of wearable device |
| CN104748869A (en) * | 2015-03-31 | 2015-07-01 | 无锡市崇安区科技创业服务中心 | Community environment temperature real-time monitoring system with node power supply optimizing effect |
| CN107942260A (en) * | 2017-12-11 | 2018-04-20 | 上海木爷机器人技术有限公司 | A kind of control method and system of battery charging and discharging test |
| CN110771003A (en) * | 2017-06-30 | 2020-02-07 | 法国大陆汽车公司 | System and method for backup battery management for emergency call devices |
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| CN1734826A (en) * | 2005-06-30 | 2006-02-15 | 上海贝豪通讯电子有限公司 | Method for improving battery availability factor |
| CN101834319A (en) * | 2010-03-10 | 2010-09-15 | 青岛海信电器股份有限公司 | Power supply management method and device and electronic equipment |
| CN201877851U (en) * | 2010-11-09 | 2011-06-22 | 福兴达科技实业（深圳）有限公司 | Charging circuit of stand-by battery |
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2010
- 2010-11-09 CN CN201010538507.4A patent/CN102468657B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734826A (en) * | 2005-06-30 | 2006-02-15 | 上海贝豪通讯电子有限公司 | Method for improving battery availability factor |
| CN101834319A (en) * | 2010-03-10 | 2010-09-15 | 青岛海信电器股份有限公司 | Power supply management method and device and electronic equipment |
| CN201877851U (en) * | 2010-11-09 | 2011-06-22 | 福兴达科技实业（深圳）有限公司 | Charging circuit of stand-by battery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505551A (en) * | 2014-12-15 | 2015-04-08 | 广东欧珀移动通信有限公司 | Charging method and charging circuit of wearable device |
| CN104505551B (en) * | 2014-12-15 | 2017-06-30 | 广东欧珀移动通信有限公司 | A kind of charging circuit of charging method and wearable device |
| CN104748869A (en) * | 2015-03-31 | 2015-07-01 | 无锡市崇安区科技创业服务中心 | Community environment temperature real-time monitoring system with node power supply optimizing effect |
| CN110771003A (en) * | 2017-06-30 | 2020-02-07 | 法国大陆汽车公司 | System and method for backup battery management for emergency call devices |
| CN107942260A (en) * | 2017-12-11 | 2018-04-20 | 上海木爷机器人技术有限公司 | A kind of control method and system of battery charging and discharging test |
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| Publication number | Publication date |
|---|---|
| CN102468657B (en) | 2014-04-23 |
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Effective date of registration: 20200602 Address after: 518000 room 304, 3 / F, Fuxing building, 6 Binglang Road, Fubao community, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Jinxuan Technology Co.,Ltd. Address before: 518038 areca road in Guangdong Province, Shenzhen Futian Free Trade Zone No. 6 Fuxing Building 4 floor Patentee before: SHENZHEN FUZHI SOFTWARE TECHNOLOGY Co.,Ltd. |
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