CN202503357U - Double-cell switching circuit - Google Patents
Double-cell switching circuit Download PDFInfo
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- CN202503357U CN202503357U CN 201220052904 CN201220052904U CN202503357U CN 202503357 U CN202503357 U CN 202503357U CN 201220052904 CN201220052904 CN 201220052904 CN 201220052904 U CN201220052904 U CN 201220052904U CN 202503357 U CN202503357 U CN 202503357U
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Abstract
The utility model discloses a double-cell switching circuit. The double-cell switching circuit comprises a first switch, a second switch and an ON-OFF control circuit. The ON-OFF control circuit of the first switch comprises a NOT gate circuit, an NAND gate circuit and a NOR gate circuit, wherein output levels of the NAND gate circuit and the NOR gate circuit control ON and OFF states of the first switch and the second switch, thereby realizing cell switching. The double-cell switch circuit can not only select one cell to supply power, but also select double cells to supply power simultaneously. Similarly, one cell can be selected to be charged, or the double cells can be selected to be charged simultaneously. In addition, voltage detecting pins automatically detect cell voltages. When one cell is insufficient in electrical power, the other cell can be automatically switched for power supplying; or the double cells can supply power simultaneously, thereby guaranteeing normal power supply, and improving endurance time.
Description
Technical field
The utility model relates to a kind of double cell commutation circuit.
Background technology
At present, the capacitance of monocell has more and more satisfied not the requirement of electronic handheld devices such as mobile phone to the battery flying power, and a large amount of electronic handheld devices begins to adopt double cell as power supply.Existing double cell scheme mainly is to increase power supply through two batteries of parallel connection to supply with, but this scheme powering mode is single, can not be in the pattern of selection monocell work under the double cell.
Summary of the invention
The utility model embodiment provides a kind of double cell commutation circuit, both can select the monocell power supply, also can select double cell to supply power simultaneously.
A kind of double cell commutation circuit comprises first switch, second switch and ON-OFF control circuit,
The input of said first switch connects the positive pole of main battery,
The positive pole of the input auxiliary connection battery of said second switch,
The output of said first switch of output of being used to supply power connects the output of the said second switch of the output that is used to supply power,
Said first ON-OFF control circuit comprises not circuit, NAND gate circuit and OR-NOT circuit,
The input of said not circuit is used to import first control level,
The output of said not circuit connects the first input end of said NAND gate circuit,
Second input of said NAND gate circuit connects the positive pole of said main battery,
The output of said NAND gate circuit connects the switch control end of first switch,
The output of said NAND gate circuit also connects second input of said OR-NOT circuit,
The first input end of said OR-NOT circuit is used to import second control level,
The output of said OR-NOT circuit connects the switch control end of second switch,
Said first switch is for enabling to be the effective electronic switch of low level;
Said second switch is for enabling to be the effective electronic switch of low level.
Preferably, the positive pole of said main battery also connects first of governor circuit and detects pin, and said first detects pin in order to detect main battery voltage; The positive pole of said secondary cell also connects second of governor circuit and detects pin, and said second detects pin in order to detect secondary cell voltage.
Preferably, the input of said not circuit connects first output of governor circuit, and first output of said governor circuit is used to export first control level; The first input end of said OR-NOT circuit connects second output of governor circuit, and second output of said governor circuit is used to export second control level.
The advantage of the utility model is: both can select the monocell power supply, also can select double cell to supply power simultaneously.Same, charging also can be selected the monocell charging, also can select double cell to charge simultaneously.In addition, detect cell voltage automatically, when the monocell power shortage, can automatically switch to an other powered battery, also can supply power jointly by double cell, ensure normal power supply, improve cruising time through the voltage detecting pin.
Description of drawings
Fig. 1 is a kind of schematic block circuit diagram of double cell commutation circuit;
Fig. 2 is a kind of circuit diagram of double cell commutation circuit.
Embodiment
The utility model embodiment provides a kind of double cell commutation circuit, below is elaborated.
As shown in Figure 1, a kind of double cell commutation circuit comprises first switch 101, second switch 102 and ON-OFF control circuit.
The input 103 of said first switch connects the positive pole of main battery 110; The positive pole of the input 104 auxiliary connection batteries 111 of said second switch, the output 105 of said first switch of the output that is used to supply power connect the output 106 of the said second switch of the output that is used to supply power.When first switch and second switch conducting, said main battery and said secondary cell are connected in parallel, common outwards power supply.When first switch conduction, when second switch breaks off, said main battery power supply.When the disconnection of first switch, during the second switch conducting, said secondary cell power supply.
Said first ON-OFF control circuit comprises not circuit 107, NAND gate circuit 108, OR-NOT circuit 109.The input 112 of said not circuit 107 is used to import first control level, and the output 113 of said not circuit 107 connects the first input end 114 of said NAND gate circuit 108.Second input 123 of said NAND gate circuit 108 connects the positive pole of said main battery 110; Output 120 is connected with the switch control end 115 of first switch 101 and second input 116 of OR-NOT circuit respectively; The first input end 117 of said OR-NOT circuit is used to import second control level, and the output 118 of said OR-NOT circuit connects the switch control end 119 of second switch 102.
Present embodiment is through the high level of said NAND gate and the output of said NOR gate or conducting or the disconnection that low level controls respectively first switch and second switch.
Preferably, the positive pole of said main battery 110 also connects in order to detect the first detection pin 121 of main battery voltage, and the positive pole of said secondary cell 111 also connects in order to detect the second detection pin 122 of secondary cell voltage.Governor circuit detects pin and second through first and detects pin and obtain the major-minor cell voltage, and according to the actual operating position of major-minor cell voltage, automatic switchover supplying cell.
Said first switch 101 is for enabling to be the effective electronic switch of low level, and said second switch 102 is for enabling to be the effective electronic switch of low level.Concrete, when the switch control end input low level of electronic switch, the electronic switch conducting, when the switch control end input high level of electronic switch, the electronic switch port.
Preferably, the input 112 of said not circuit connects first output of governor circuit, and first output of said governor circuit is used to export first control level; The first input end 117 of said OR-NOT circuit connects second output of governor circuit, and second output of said governor circuit is used to export second control level.
In order better to understand the foregoing description, below to be applied to mobile phone with the foregoing description be that example is elaborated.
When main battery only is installed, when secondary cell not being installed, second input of said NAND gate circuit is from the anodal input high level of main battery.Before start; The first control level GPIO0 that imports said not circuit input is a low level; First input end through the said NAND gate circuit of input behind the said not circuit; Make that the output of said NAND gate circuit is a low level and since first switch enable to be low level, first switch conduction.Because said NAND gate circuit is to the second input output low level of said OR-NOT circuit; And when not starting shooting; The second control level GPIO1 that imports the first input end of said OR-NOT circuit is a low level; Make said OR-NOT circuit be output as high level, second switch breaks off, main battery power supply this moment.
When secondary cell only is installed; When main battery not being installed; Before start, the second input input low level of said NAND gate circuit, the GPIO0 that imports said not circuit input is a low level; Make the output of said NAND gate circuit export high level, the then second input input high level of said OR-NOT circuit.The output output low level of said OR-NOT circuit, second switch conducting, secondary cell power supply this moment.
When simultaneously main battery and secondary cell being installed, before start, the GPIO0 that imports the input of said not circuit is a low level; Importing said NAND gate circuit second input is high level; The output output low level of said NAND gate circuit then, first switch conduction, main battery is outwards supplied power.And this moment, what import said OR-NOT circuit second input is low level, and the output output high level of said OR-NOT circuit, second switch break off, and secondary cell is outwards power supply not.
Main battery and secondary cell are installed when simultaneously, and behind mobile phone power-on, governor circuit detects pin and second through first and detects the voltage that pin detects main battery and secondary cell.When main battery is lower than set point (like 3.5V), and secondary cell voltage is when being higher than this set point, and governor circuit is controlled the keying of first switch and second switch, switching battery through output GPO0 and GPO1.The practical implementation method is: governor circuit is to said not circuit output GPO0, and GPO0 is a high level, and then said not circuit is output as low level; Said NAND gate circuit output high level, first switch breaks off, and main battery is outwards power supply not; Then said NOR gate is input as high level, is output as low level, the second switch conducting; Secondary cell is outwards supplied power, thereby realizes from the switching of main battery to secondary cell.
When the voltage of main battery and secondary cell when all lower (as all less than 3.5V), can two batteries parallel connections be used in the conductings simultaneously of two batteries, because parallel connection can make internal resistance lower, can prolong the normal power supply time of mobile phone.Implementation method is: governor circuit is to said not circuit output GPIO0; GPIO0 is changed to low level; The output of said not circuit output high level, the first input end input high level of said NAND gate circuit then is again because second end of said NAND gate circuit is input as high level; Then the output of said NAND gate circuit is output as low level, first switch conduction.Simultaneously, governor circuit is to the first input end output GPIO1 of said OR-NOT circuit, and GPIO1 is changed to high level; Second input of said OR-NOT circuit is imported the high level of said NAND gate output output; Therefore, said OR-NOT circuit output output low level, second switch conducting.Under first switch and second switch conducting simultaneously situation, main battery and secondary cell are connected in parallel, common outwards power supply.
Certainly, when main battery voltage during greater than set point (like 3.5V), GPIO0 and the GPIO1 of governor circuit output are low level, first switch conduction then, and the second switch disconnection has only main battery outwards to supply power.Wherein principle and process can repeat no more with reference to the foregoing description here.
Obviously, exporting at the positive pole of main battery and secondary cell all is under the high level situation, when GPIO0 is changed to low level, and first switch conduction, the main battery power supply, when GPIO1 is changed to high level, second switch conducting, secondary cell power supply.Therefore, governor circuit can be realized the switching and the parallel connection use of main battery and secondary cell through the GPIO0 and the GPIO1 of control output.
When mobile phone is charged, also can charge through switching main battery and secondary cell, its principle is same as described above, repeats no more here.
In order better to understand the circuit of the utility model, can consult Fig. 2.
Among Fig. 2; Said not circuit is made up of NMOS pipe and resistance; Said NAND gate circuit is managed Q2, Q3 and resistance etc. by NMOS and is constituted; Not circuit can also be made up of diode D1, D2, NMOS pipe Q1, resistance etc., the electronic switch of major-minor battery, and promptly first switch and second switch U1, U2 can be made up of two back-to-back PMOS pipes; The power supply of not circuit, NAND gate circuit and OR-NOT circuit is provided by any power supply of major-minor battery, has used diode D3, D4; In order to make major-minor electronic switch switch simultaneously, in governor circuit, also adopted the RC delay circuit, form by R5 and C1.
Obviously, governor circuit can adopt software to control, and repeats no more here.
More than a kind of double cell commutation circuit that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper the principle and the execution mode of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (3)
1. a double cell commutation circuit is characterized in that, comprises first switch, second switch and ON-OFF control circuit,
The input of said first switch connects the positive pole of main battery, the positive pole of the input auxiliary connection battery of said second switch;
The output of said first switch is connected with the output of said second switch;
Said first ON-OFF control circuit comprises not circuit, NAND gate circuit and OR-NOT circuit;
The input of said not circuit is used to import first control level, and output connects the first input end of said NAND gate circuit;
Second input of said NAND gate circuit connects the positive pole of said main battery; First input end is used to import second control level, and the output of said NAND gate circuit is connected said OR-NOT circuit respectively with second input of the switch control end of first switch and OR-NOT circuit output connects the switch control end of second switch;
Said first switch and second switch are for enabling to be the effective electronic switch of low level.
2. double cell commutation circuit according to claim 1 is characterized in that:
The positive pole of said main battery also connects first of governor circuit and detects pin, and said first detects pin in order to detect main battery voltage;
The positive pole of said secondary cell also connects second of governor circuit and detects pin, and said second detects pin in order to detect secondary cell voltage.
3. double cell commutation circuit according to claim 1 and 2 is characterized in that:
The input of said not circuit connects first output of governor circuit, and first output of said governor circuit is used to export first control level;
The first input end of said OR-NOT circuit connects second output of governor circuit, and second output of said governor circuit is used to export second control level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220052904 CN202503357U (en) | 2012-02-17 | 2012-02-17 | Double-cell switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220052904 CN202503357U (en) | 2012-02-17 | 2012-02-17 | Double-cell switching circuit |
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| CN202503357U true CN202503357U (en) | 2012-10-24 |
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| CN 201220052904 Expired - Fee Related CN202503357U (en) | 2012-02-17 | 2012-02-17 | Double-cell switching circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143842A (en) * | 2013-05-07 | 2014-11-12 | 深圳富泰宏精密工业有限公司 | Charge control circuit |
| CN106100014A (en) * | 2016-06-08 | 2016-11-09 | 北京疯景科技有限公司 | A kind of charging circuit and charging method |
| CN106532902A (en) * | 2016-10-14 | 2017-03-22 | 惠州Tcl移动通信有限公司 | Mobile terminal dual-battery control device and method |
| CN109004729A (en) * | 2018-07-26 | 2018-12-14 | 合肥联宝信息技术有限公司 | A kind of electronic equipment and its control method |
| CN109347163A (en) * | 2018-10-29 | 2019-02-15 | Oppo广东移动通信有限公司 | Charging method, mobile power source and computer storage medium |
| CN110308780A (en) * | 2019-07-18 | 2019-10-08 | Oppo（重庆）智能科技有限公司 | Battery management method, system, terminal device and storage medium |
| CN111668911A (en) * | 2019-03-05 | 2020-09-15 | 富泰华工业（深圳）有限公司 | Power supply circuit and electronic device |
| CN115597092A (en) * | 2022-10-20 | 2023-01-13 | 广州市红日燃具有限公司（Cn） | Gas stove battery power supply control method, control device and medium |
-
2012
- 2012-02-17 CN CN 201220052904 patent/CN202503357U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143842A (en) * | 2013-05-07 | 2014-11-12 | 深圳富泰宏精密工业有限公司 | Charge control circuit |
| CN106100014A (en) * | 2016-06-08 | 2016-11-09 | 北京疯景科技有限公司 | A kind of charging circuit and charging method |
| CN106100014B (en) * | 2016-06-08 | 2019-03-01 | 北京疯景科技有限公司 | A kind of charging circuit and charging method |
| CN106532902A (en) * | 2016-10-14 | 2017-03-22 | 惠州Tcl移动通信有限公司 | Mobile terminal dual-battery control device and method |
| CN106532902B (en) * | 2016-10-14 | 2019-12-10 | 惠州Tcl移动通信有限公司 | double-battery control device and method for mobile terminal |
| CN109004729A (en) * | 2018-07-26 | 2018-12-14 | 合肥联宝信息技术有限公司 | A kind of electronic equipment and its control method |
| CN109347163A (en) * | 2018-10-29 | 2019-02-15 | Oppo广东移动通信有限公司 | Charging method, mobile power source and computer storage medium |
| CN111668911A (en) * | 2019-03-05 | 2020-09-15 | 富泰华工业（深圳）有限公司 | Power supply circuit and electronic device |
| CN110308780A (en) * | 2019-07-18 | 2019-10-08 | Oppo（重庆）智能科技有限公司 | Battery management method, system, terminal device and storage medium |
| CN115597092A (en) * | 2022-10-20 | 2023-01-13 | 广州市红日燃具有限公司（Cn） | Gas stove battery power supply control method, control device and medium |
| CN115597092B (en) * | 2022-10-20 | 2023-10-31 | 广州市红日燃具有限公司 | Control method, control device and medium for power supply of gas stove battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TINNO MOBILE TECHNOLOGY CORP. Free format text: FORMER NAME: SHENZHEN TINNO MOBILE TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 4, A, building 518053, building H-3, East China Town, 1, Xiangshan East Street, Shenzhen, Guangdong, Nanshan District Patentee after: SHENZHEN TINNO MOBILE TECHNOLOGY CO., LTD. Patentee after: Shenzhen Tinno Wireless Technology Co., Ltd. Address before: 4, A, building 518053, building H-3, East China Town, 1, Xiangshan East Street, Shenzhen, Guangdong, Nanshan District Patentee before: Shenzhen Tinno Mobile Technology Co., Ltd. Patentee before: Shenzhen Tinno Wireless Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20180217 |