CN204216600U - Synchronization lifting piezoelectric battery charging device - Google Patents
Synchronization lifting piezoelectric battery charging device Download PDFInfo
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- CN204216600U CN204216600U CN201420592606.4U CN201420592606U CN204216600U CN 204216600 U CN204216600 U CN 204216600U CN 201420592606 U CN201420592606 U CN 201420592606U CN 204216600 U CN204216600 U CN 204216600U
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 12
- 230000005669 field effect Effects 0.000 claims description 92
- 239000003990 capacitor Substances 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 6
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Abstract
The utility model discloses a kind of synchronization lifting piezoelectric battery charging device, comprise direct-flow input circuit, MCU control circuit, booster circuit, reduction voltage circuit and rechargeable battery, the input of direct-flow input circuit is connected to the output of external charging adapter, the output of direct-flow input circuit and the output of rechargeable battery are connected to the input of MCU control circuit, and the output of direct-flow input circuit is also connected to the input of booster circuit and the input of reduction voltage circuit; Direct-flow input circuit provides DC power supply for MCU control circuit, and the voltage of MCU control circuit to rechargeable battery is sampled, and controls booster circuit or reduction voltage circuit work according to sampled result, and booster circuit or reduction voltage circuit charge to rechargeable battery.The utility model can accept to input higher or lower than the DC power supply of cell voltage, realizes charging to rechargeable battery by synchronous buck or boosting.No matter be that step-down charging or boosting are filled, all adopt the method for synchronization, efficiency is high, and line loss is low.
Description
Technical field
The utility model relates to battery charger, is specifically related to a kind of battery charger with synchronization lifting compression functions.
Background technology
Now, portable power source towards export multiple voltage, compatible various input voltage future development, to adapt to the application demand of different occasion.Such as: current most of occasion, portable power source can only export 5V, in fact notebook computer or some panel computers, and its input voltage is not 5V, then cannot use current portable power source.Charging is also the same, and user has the adapter of 5V, also has the more high-tension adapter for dull and stereotyped or notebook.
Meanwhile, existing portable power source also runs into following problem: 1. will export high pressure, and cell voltage must reach height, if input voltage is lower than cell voltage, then needs boost charge; 2., during actual use, input voltage likely can, higher than cell voltage, at this moment just need step-down to charge; 3. for this demand, necessity a kind of can boosting again can the charging circuit of step-down.Therefore, how to design a kind of efficient, the charging circuit that cost is low is again that of the current industry pursues a goal.
Utility model content
Therefore, for above-mentioned problem, the utility model proposes and can to boost and can the buck battery charger of step-down, and its circuit structure is optimized, make it boost and step-down realizes synchronous, thus a kind of not only efficient cost but also low battery charger are provided.
In order to realize above-mentioned technical problem, the technical scheme that the utility model adopts is, synchronization lifting piezoelectric battery charging device, comprise direct-flow input circuit, MCU control circuit, booster circuit, reduction voltage circuit and rechargeable battery, the input of direct-flow input circuit is connected to the output of external charging adapter, for receiving the DC power supply of input, the output of direct-flow input circuit and the output of rechargeable battery are connected to the input of MCU control circuit, and the output of direct-flow input circuit is also connected to the input of booster circuit and the input of reduction voltage circuit; Direct-flow input circuit provides DC power supply for MCU control circuit, and the voltage of MCU control circuit to rechargeable battery is sampled, and controls booster circuit or reduction voltage circuit work according to sampled result, and booster circuit or reduction voltage circuit charge to rechargeable battery.This synchronization lifting piezoelectric battery charging device receives extraneous direct current input, and by the Based Intelligent Control of MCU control circuit, convert thereof into suitable voltage level to charge to rechargeable battery, therefore charging device of the present utility model can accept to input higher or lower than the DC power supply of the voltage of rechargeable battery.
Wherein, described MCU control circuit adopts synchronous buck-booster type battery charge controlling chip to realize.MCU control circuit is adopted to carry out sampling, the comparison of input voltage and cell voltage, according to the result of comparison to determine being adopt boosting or the type of drive of step-down.
Further, described reduction voltage circuit comprises polar capacitor C1, field effect transistor Q1, field effect transistor Q3, inductance L 1, polar capacitor C2, the positive pole of polar capacitor C1 and the D pole of field effect transistor Q1 are connected to direct-flow input circuit, the minus earth of polar capacitor C1, the G pole of field effect transistor Q1 connects a PWM drive end of MCU control circuit, the S pole of field effect transistor Q1 connects one end of inductance L 1 and the D pole of field effect transistor Q3, the G pole of field effect transistor Q3 connects the 2nd PWM drive end of MCU control circuit, and the other end of L1 is connected to booster circuit; The S pole ground connection of field effect transistor Q3.In this reduction voltage circuit, adopting polar capacitor C1, field effect transistor Q1, field effect transistor Q3, inductance L 1, polar capacitor C2, is also 2 electric capacity, 2 switch MOS pipes (field effect transistor), and an inductance can realize step-down charging.
Further, described booster circuit comprises polar capacitor C1, field effect transistor Q2, field effect transistor Q4, inductance L 1, polar capacitor C2, the positive pole of polar capacitor C1 is connected to direct-flow input circuit, the minus earth of polar capacitor C1, the G pole of field effect transistor Q2 connects the 3rd PWM drive end of MCU control circuit, the G pole of field effect transistor Q4 connects the 4th PWM drive end of MCU control circuit, the D pole of field effect transistor Q2 is connected the other end of inductance L 1 with the D pole of field effect transistor Q4, the S pole ground connection of field effect transistor Q4; The S pole of field effect transistor Q2 is connected to the power end of rechargeable battery, in order to carry out battery voltage detection and charging current detection.In this booster circuit, adopt polar capacitor C1, field effect transistor Q2, field effect transistor Q4, inductance L 1, polar capacitor C2, be also 2 electric capacity, 2 switch MOS pipes (field effect transistor), an inductance, can realize boost charge.
Known by forming of above-mentioned booster circuit and reduction voltage circuit, its shared polar capacitor C1, inductance L 1, polar capacitor C2, then adopt two switch MOS pipes separately respectively, together with MCU control circuit, forms the charging device of synchronization lifting pressure.
The utility model adopts such scheme, and the DC power supply that can accept higher or lower than cell voltage inputs, and realizes charging to rechargeable battery by synchronous buck or boosting.Meanwhile, no matter be that step-down charging or boosting are filled, all adopt the method for synchronization, efficiency is high, and line loss is low.In addition, to be of the present utility modelly skillfully constructed, circuit structure is simple, is easy to realize, with low cost, has good practical value.
Accompanying drawing explanation
Fig. 1 is the circuit module block diagram of synchronization lifting piezoelectric battery charging device of the present utility model;
Fig. 2 is the circuit theory diagrams of synchronization lifting piezoelectric battery charging device of the present utility model;
Fig. 3 is the principle schematic (input voltage is higher than cell voltage) of synchronization lifting piezoelectric battery charging device of the present utility model;
Fig. 4 is the principle schematic (input voltage is lower than cell voltage) of synchronization lifting piezoelectric battery charging device of the present utility model.
Embodiment
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
Synchronization lifting piezoelectric battery charging device of the present utility model, see Fig. 1, it comprises direct-flow input circuit, MCU control circuit, booster circuit, reduction voltage circuit and rechargeable battery, the input of direct-flow input circuit is connected to the output of external charging adapter, for receiving the DC power supply of input, the output of direct-flow input circuit and the output of rechargeable battery are connected to the input of MCU control circuit, and the output of direct-flow input circuit is also connected to the input of booster circuit and the input of reduction voltage circuit; Direct-flow input circuit provides DC power supply for MCU control circuit, and the voltage of MCU control circuit to rechargeable battery is sampled, and controls booster circuit or reduction voltage circuit work according to sampled result, and booster circuit or reduction voltage circuit charge to rechargeable battery.This synchronization lifting piezoelectric battery charging device receives extraneous direct current input, and by the Based Intelligent Control of MCU control circuit, convert thereof into suitable voltage level to charge to rechargeable battery, therefore charging device of the present utility model can accept to input higher or lower than the DC power supply of the voltage of rechargeable battery.
Wherein, described MCU control circuit adopts synchronous buck-booster type battery charge controlling chip to realize.MCU control circuit is adopted to carry out sampling, the comparison of input voltage and cell voltage, according to the result of comparison to determine being adopt boosting or the type of drive of step-down.
As a concrete example, participate in Fig. 2, synchronization lifting piezoelectric battery charging device comprises polar capacitor C1, polar capacitor C2, field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4, inductance L 1, battery BT1 and resistance R1.
Wherein, reduction voltage circuit comprises polar capacitor C1, field effect transistor Q1, field effect transistor Q3, inductance L 1, polar capacitor C2, the positive pole of polar capacitor C1 and the D pole of field effect transistor Q1 are connected to direct-flow input circuit, the minus earth of polar capacitor C1, the G pole of field effect transistor Q1 connects a PWM drive end of MCU control circuit, the S pole of field effect transistor Q1 connects one end of inductance L 1 and the D pole of field effect transistor Q3, the G pole of field effect transistor Q3 connects the 2nd PWM drive end of MCU control circuit, and the other end of L1 is connected to booster circuit; The S pole ground connection of field effect transistor Q3.In this reduction voltage circuit, adopt polar capacitor C1, field effect transistor Q1, field effect transistor Q3, inductance L 1, polar capacitor C2, also be 2 electric capacity, 2 switch MOS pipes (field effect transistor), an inductance, step-down charging (MOS refers to a kind of semiconductor components and devices, can realize switching function under the effect of control signal) can be realized.
Booster circuit comprises polar capacitor C1, field effect transistor Q2, field effect transistor Q4, inductance L 1, polar capacitor C2, the positive pole of polar capacitor C1 is connected to direct-flow input circuit, the minus earth of polar capacitor C1, the G pole of field effect transistor Q2 connects the 3rd PWM drive end of MCU control circuit, the G pole of field effect transistor Q4 connects the 4th PWM drive end of MCU control circuit, the D pole of field effect transistor Q2 is connected the other end of inductance L 1 with the D pole of field effect transistor Q4, the S pole ground connection of field effect transistor Q4; The S pole of field effect transistor Q2 is connected to the power end of rechargeable battery, in order to carry out battery voltage detection and charging current detection.In this booster circuit, adopt polar capacitor C1, field effect transistor Q2, field effect transistor Q4, inductance L 1, polar capacitor C2, be also 2 electric capacity, 2 switch MOS pipes (field effect transistor), an inductance, can realize boost charge.
Known by forming of above-mentioned booster circuit and reduction voltage circuit, its shared polar capacitor C1, inductance L 1, polar capacitor C2, then adopt two switch MOS pipes separately respectively, together with MCU control circuit, forms the charging device of synchronization lifting pressure.
Situation 1: when MCU control circuit detects input voltage higher than cell voltage
See Fig. 3, when MCU control circuit detects input voltage higher than cell voltage, the MOS of field effect transistor Q4 disconnects, and the MOS of field effect transistor Q2 connects.Now:
When the MOS of one-period: field effect transistor Q1 connects, the MOS of field effect transistor Q3 disconnects, and the high tension voltage of input is charged to L1 and C2 and battery by field effect transistor Q1.
The MOS of second period: field effect transistor Q1 disconnects, and the MOS of field effect transistor Q3 opens, and because the electric current in inductance L 1 can not suddenly change, field effect transistor Q3 plays the effect of an afterflow, and inductance L 1 is charged to polarity battery C2 and battery BT1.
Cycle one and cycle two circulation are carried out, and realized the requirement of output voltage step-down, be supplied to the charging voltage that battery is suitable by the time accounting controlling period 1 and second round.But owing to being all adopt MOS switching tube to carry out conducting in this process, line drop and loss can reduce to tightly little, i.e. so-called synchronous buck.
In this device, polar capacitor C1 is input capacitance, field effect transistor Q1 is PMOS, field effect transistor Q3 is NMOS, and inductance L 1 is for energy storage inductor, and field effect transistor Q4 is NMOS, field effect transistor Q2 is PMOS, polar capacitor C2 is output capacitance, and resistance R1 is current sense resistor, and MCU control circuit is for controlling the running of whole circuit.By identifying the voltage differences of VCC_IN and VCC_BAT, the MOS starting field effect transistor Q1/ field effect transistor Q3 or field effect transistor Q2/ field effect transistor Q4 respectively realizes the charging hindered battery, this circuit structure is simple, number of elements used is few, adopt synchronous mode, charge efficiency is high, can realize the advantage in cost price and performance.
Situation 2: when MCU control circuit detects input voltage lower than cell voltage:
See Fig. 4, when MCU control circuit detects input voltage lower than cell voltage, the MOS of field effect transistor Q3 disconnects, and the MOS of field effect transistor Q1 connects.Now:
When the MOS of one-period: field effect transistor Q4 connects, the MOS of field effect transistor Q2 disconnects, and the low voltage voltage of input is charged to inductance L 1 by inductance L 1, field effect transistor Q4.
The MOS of second period: field effect transistor Q4 disconnects, and the MOS of field effect transistor Q2 opens, and because the electric current in inductance L 1 can not suddenly change, is charged together with the electromotive force in inductance L 1 superposes with input voltage by field effect transistor Q2 to polar capacitor C2 and battery BT1.
Cycle one and cycle two circulation are carried out, and realized the requirement of output voltage boosting, be supplied to the charging voltage that battery is suitable by the time accounting controlling period 1 and second round.But owing to being all adopt MOS switching tube to carry out conducting in this process, line drop and loss can reduce to tightly little, i.e. so-called synchronous boost.
As from the foregoing, the utility model can adopt same input capacitance (polar capacitor C1), output capacitance (polar capacitor C2), adopt an inductance (inductance L 1), by controlling different metal-oxide-semiconductors (field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4), realize efficient synchronous boost or step-down battery charging function.When input voltage is greater than cell voltage, adopt the charging of synchronous buck pattern.Front and back voltage difference is different, realizes regulating by the duty ratio (duty ratio refers to high level and low level ratio in square-wave signal) of the switch of 2 MOS.When input voltage is less than cell voltage, adopt the charging of synchronous boost pattern.Front and back voltage difference is different, realizes regulating by the duty ratio of the switch of 2 MOS.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (4)
1. synchronization lifting piezoelectric battery charging device, is characterized in that: comprise direct-flow input circuit, MCU control circuit, booster circuit, reduction voltage circuit and rechargeable battery;
The input of direct-flow input circuit is connected to the output of external charging adapter, for receiving the DC power supply of input;
The output of direct-flow input circuit and the output of rechargeable battery are connected to the input of MCU control circuit, and the output of direct-flow input circuit is also connected to the input of booster circuit and the input of reduction voltage circuit; Direct-flow input circuit provides DC power supply for MCU control circuit, and the voltage of MCU control circuit to rechargeable battery is sampled, and controls booster circuit or reduction voltage circuit work according to sampled result;
Booster circuit or reduction voltage circuit charge to rechargeable battery.
2. synchronization lifting piezoelectric battery charging device according to claim 1, is characterized in that: described MCU control circuit adopts synchronous buck-booster type battery charge controlling chip to realize.
3. synchronization lifting piezoelectric battery charging device according to claim 2, it is characterized in that: described reduction voltage circuit comprises polar capacitor C1, field effect transistor Q1, field effect transistor Q3, inductance L 1, polar capacitor C2, the positive pole of polar capacitor C1 and the D pole of field effect transistor Q1 are connected to direct-flow input circuit, the minus earth of polar capacitor C1, the G pole of field effect transistor Q1 connects a PWM drive end of MCU control circuit, the S pole of field effect transistor Q1 connects one end of inductance L 1 and the D pole of field effect transistor Q3, the G pole of field effect transistor Q3 connects the 2nd PWM drive end of MCU control circuit, the other end of L1 is connected to booster circuit, the S pole ground connection of field effect transistor Q3.
4. synchronization lifting piezoelectric battery charging device according to claim 3, it is characterized in that: described booster circuit comprises polar capacitor C1, field effect transistor Q2, field effect transistor Q4, inductance L 1, polar capacitor C2, the positive pole of polar capacitor C1 is connected to direct-flow input circuit, the minus earth of polar capacitor C1, the G pole of field effect transistor Q2 connects the 3rd PWM drive end of MCU control circuit, the G pole of field effect transistor Q4 connects the 4th PWM drive end of MCU control circuit, the D pole of field effect transistor Q2 is connected the other end of inductance L 1 with the D pole of field effect transistor Q4, the S pole ground connection of field effect transistor Q4, the S pole of field effect transistor Q2 is connected to the power end of rechargeable battery, in order to carry out battery voltage detection and charging current detection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420592606.4U CN204216600U (en) | 2014-09-25 | 2014-09-25 | Synchronization lifting piezoelectric battery charging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420592606.4U CN204216600U (en) | 2014-09-25 | 2014-09-25 | Synchronization lifting piezoelectric battery charging device |
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| CN204216600U true CN204216600U (en) | 2015-03-18 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186587A (en) * | 2015-05-12 | 2015-12-23 | 青岛鼎信通讯股份有限公司 | Active output control method of two-wire system |
| CN105610224A (en) * | 2016-03-09 | 2016-05-25 | 西安后羿半导体科技有限公司 | Mobile power supply |
| CN106130135A (en) * | 2016-08-19 | 2016-11-16 | 深圳市纽莱克科技有限公司 | A kind of high efficiency constant-voltage power supply circuit |
| TWI584556B (en) * | 2016-03-25 | 2017-05-21 | 茂達電子股份有限公司 | Charging device and control method thereof |
| CN110445208A (en) * | 2019-08-05 | 2019-11-12 | 维沃移动通信有限公司 | A kind of charging circuit and terminal |
| CN112783038A (en) * | 2020-12-30 | 2021-05-11 | 四川五视天下科技有限公司 | Main control circuit system of light and small unmanned aerial vehicle |
| CN113015291A (en) * | 2021-01-28 | 2021-06-22 | 厦门东昂科技股份有限公司 | Track lamp and circuit thereof |
-
2014
- 2014-09-25 CN CN201420592606.4U patent/CN204216600U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186587A (en) * | 2015-05-12 | 2015-12-23 | 青岛鼎信通讯股份有限公司 | Active output control method of two-wire system |
| CN105610224A (en) * | 2016-03-09 | 2016-05-25 | 西安后羿半导体科技有限公司 | Mobile power supply |
| TWI584556B (en) * | 2016-03-25 | 2017-05-21 | 茂達電子股份有限公司 | Charging device and control method thereof |
| CN106130135A (en) * | 2016-08-19 | 2016-11-16 | 深圳市纽莱克科技有限公司 | A kind of high efficiency constant-voltage power supply circuit |
| CN110445208A (en) * | 2019-08-05 | 2019-11-12 | 维沃移动通信有限公司 | A kind of charging circuit and terminal |
| CN112783038A (en) * | 2020-12-30 | 2021-05-11 | 四川五视天下科技有限公司 | Main control circuit system of light and small unmanned aerial vehicle |
| CN112783038B (en) * | 2020-12-30 | 2022-01-11 | 四川五视天下科技有限公司 | Main control circuit system of light and small unmanned aerial vehicle |
| CN113015291A (en) * | 2021-01-28 | 2021-06-22 | 厦门东昂科技股份有限公司 | Track lamp and circuit thereof |
| CN113015291B (en) * | 2021-01-28 | 2023-06-16 | 厦门东昂科技股份有限公司 | Track lamp and circuit thereof |
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Granted publication date: 20150318 |