CN204696770U - Charging circuit and charger - Google Patents
Charging circuit and charger Download PDFInfo
- Publication number
- CN204696770U CN204696770U CN201520376432.2U CN201520376432U CN204696770U CN 204696770 U CN204696770 U CN 204696770U CN 201520376432 U CN201520376432 U CN 201520376432U CN 204696770 U CN204696770 U CN 204696770U
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- CN
- China
- Prior art keywords
- electronic switch
- resistance
- charging circuit
- battery
- transformer
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of charging circuit and charger, wherein, this charging circuit comprises the first ac input end, second ac input end, transformer, diode, first resistance, second resistance, battery, first electronic switch and the second electronic switch, when the first ac input end and the second ac input end incoming transport electricity and the induced voltage of the secondary coil of described transformer be in negative half-cycle time, described induced voltage drives the first electronic switch conducting, to drive the second electronic switch conducting, described battery is by described second electronic switch, second conductive discharge, when the first ac input end and the second ac input end do not have incoming transport electricity, described first electronic switch and the second electronic switch all turn off, and described battery does not discharge.The utility model can improve the charge efficiency of charging circuit, can avoid the battery discharge when alternating current disconnected by charging circuit simultaneously.
Description
Technical field
The utility model relates to battery boosting technology field, particularly relates to a kind of charging circuit and charger.
Background technology
Most electronic equipment and electrical equipment have can recharge use secondary cell, secondary cell is commonly called as rechargeable battery or storage battery.
Figure 1 shows that an existing charging circuit, electric main is reduced to suitable alternating voltage by transformer TR01, this alternating voltage is by becoming the direct voltage of pulsation after diode D01 rectification, current limliting again through resistance R01 is that battery BAT01 charges, this charging circuit configuration is simple, be easy to realize, cost is low, general charger generally adopts, but this charging circuit is due in the process of charging, battery can produce polarizing voltage, and produce the efficiency that polarizing voltage can reduce charging on the one hand, interference can be produced on the other hand to the supervisory circuit of battery charging, battery is terminated in advance when not being full of, this situation is especially obvious when large current charge.
Charging circuit shown in Fig. 2 improves the charging circuit shown in Fig. 1, a resistance R03 in parallel at diode D02 two ends, its operation principle is when the induced voltage of transformer TR03 secondary winding is in positive half cycle, this voltage is that battery BAT02 charges by diode D02 and resistance R02, when the induced voltage of transformer TR02 secondary winding is in negative half period, this voltage forms a discharge loop by battery BAT02 and resistance R03, select the size of resistance R03 can the size of controlled discharge electric current, generally get that discharging current is charging current 5% ~ 20%, the generation of polarizing voltage can be reduced like this, reach unpolarized object.But, for the charging circuit shown in Fig. 2, when not connecting alternating current, discharge loop exists always, the running down of battery that can will be full of like this, no matter be that on free-standing charger or machine, charger is all little use for this situation, therefore the application of the charging circuit shown in Fig. 2 is restricted.
Utility model content
Main purpose of the present utility model is to provide a kind of charging circuit, is intended to the charge efficiency improving charging circuit, avoids the battery discharge when alternating current disconnected by charging circuit simultaneously.
In order to achieve the above object, the charging circuit that the utility model provides, comprises the first ac input end, the second ac input end, transformer, diode, the first resistance, the second resistance, battery, the first electronic switch and the second electronic switch;
The primary coil of described transformer connects described first ac input end and the second ac input end is electric with incoming transport, secondary coil one end of described transformer is connected with the first end of described first electronic switch and the negative pole of described battery respectively, the secondary coil other end of described transformer is connected with the second end of described first electronic switch, and is connected with the positive pole of described battery via described diode, the first resistance; The first end of described second electronic switch and the three-terminal link of described first electronic switch, second end of described second electronic switch is connected with the positive pole of described battery, and the 3rd end of described second electronic switch is connected with the negative pole of described battery via described second resistance; When incoming transport is electric and the induced voltage of the secondary coil of described transformer is in negative half-cycle, described induced voltage drives the first electronic switch conducting, and to drive the second electronic switch conducting, described battery is by described second electronic switch, the second conductive discharge; When not having incoming transport electricity, described first electronic switch and the second electronic switch all turn off, and described battery does not discharge.
Preferably, described first electronic switch is NPN triode, the base stage of described NPN triode is the first end of described first electronic switch, the second end of very described first electronic switch of transmitting of described NPN triode, the 3rd end of very described first electronic switch of current collection of described NPN triode.
Preferably, described first electronic switch can also be NMOS tube, the grid of described NMOS tube is the first end of described first electronic switch, and the source electrode of described NMOS tube is the second end of described first electronic switch, and the drain electrode of described NMOS tube is the 3rd end of described first electronic switch.
Preferably, described second electronic switch is PNP triode, the base stage of described PNP triode is the first end of described second electronic switch, the second end of very described second electronic switch of transmitting of described PNP triode, the 3rd end of very described second electronic switch of current collection of described PNP triode.
Preferably, described second electronic switch can also be PMOS, the grid of described PMOS is the first end of described second electronic switch, and the source electrode of described PMOS is the second end of described second electronic switch, and the drain electrode of described PMOS is the 3rd end of described second electronic switch.
Preferably, described charging circuit also comprises the 3rd resistance, and one end of described 3rd resistance is connected with secondary coil second end of described transformer, and the other end of described 3rd resistance is connected with the first end of described first electronic switch.
Preferably, described charging circuit also comprises the 4th resistance, and one end of described 4th resistance and the three-terminal link of described first electronic switch, the other end of described 4th resistance is connected with the first end of described second electronic switch.
The utility model also provides a kind of charger, this charger comprises charging circuit, and this charging circuit comprises the first ac input end, the second ac input end, transformer, diode, the first resistance, the second resistance, battery, the first electronic switch and the second electronic switch;
The primary coil of described transformer connects described first ac input end and the second ac input end is electric with incoming transport, secondary coil one end of described transformer is connected with the first end of described first electronic switch and the negative pole of described battery respectively, the secondary coil other end of described transformer is connected with the second end of described first electronic switch, and is connected with the positive pole of described battery via described diode, the first resistance; The first end of described second electronic switch and the three-terminal link of described first electronic switch, second end of described second electronic switch is connected with the positive pole of described battery, and the 3rd end of described second electronic switch is connected with the negative pole of described battery via described second resistance; When incoming transport is electric and the induced voltage of the secondary coil of described transformer is in negative half-cycle, described induced voltage drives the first electronic switch conducting, and to drive the second electronic switch conducting, described battery is by described second electronic switch, the second conductive discharge; When not having incoming transport electricity, described first electronic switch and the second electronic switch all turn off, and described battery does not discharge.
Technical solutions of the utility model are by when incoming transport is electric and the induced voltage of transformer secondary coil is in negative half-cycle, this induced voltage drives the first electronic switch conducting, to drive the second electronic switch conducting, now battery is by described second electronic switch, the second conductive discharge, avoid battery to produce polarizing voltage, improve the charge efficiency of charging circuit; And when not having incoming transport electricity, the first electronic switch and the second electronic switch all turn off, and battery does not have discharge loop and do not discharge, and avoid the battery discharge when alternating current disconnected by charging circuit and exhaust battery electric quantity.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of existing charging circuit one embodiment;
Fig. 2 is the electrical block diagram of existing another embodiment of charging circuit;
Fig. 3 is the electrical block diagram of the utility model charging circuit preferred embodiment.
Label declaration in accompanying drawing 3:
| First ac input end V1 | First ac input end V2 | Transformer TR | Diode D1 |
| First resistance R1 | Second resistance R2 | 3rd resistance R3 | 4th resistance R4 |
| First electronic switch Q1 | Second electronic switch Q2 | Battery BAT |
The realization of the purpose of this utility model, functional characteristics and advantage, will in conjunction with the embodiments, and be described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of charging circuit.
With reference to the electrical block diagram that Fig. 3, Fig. 3 are the preferred embodiment of the utility model charging circuit.
In the utility model preferred embodiment, charging circuit of the present utility model comprises the first ac input end V1, the second ac input end V2, transformer TR, diode D1, the first resistance R1, the second resistance R2, battery BAT, the first electronic switch Q1 and the second electronic switch Q2.
The primary coil of described transformer TR connects described first ac input end V1 and the second ac input end V2 with incoming transport electricity, secondary coil one end of described transformer TR is connected with the first end of described first electronic switch Q1 and the negative pole of described battery BAT respectively, the secondary coil other end of described transformer TR is connected with second end of described first electronic switch Q1, and is connected with the positive pole of described battery BAT via described diode D1, the first resistance R1; The first end of described second electronic switch Q2 and the three-terminal link of described first electronic switch Q1, second end of described second electronic switch Q2 is connected with the positive pole of described battery BAT, and the 3rd end of described second electronic switch Q2 is connected with the negative pole of described battery BAT via described second resistance R2; When incoming transport is electric and the induced voltage of the secondary coil of described transformer TR is in negative half-cycle, described induced voltage drives the first electronic switch Q1 conducting, to drive the second electronic switch Q2 conducting, described battery BAT is discharged by described second electronic switch Q2, the second resistance R2; When not having incoming transport electricity, described first electronic switch Q1 and the second electronic switch Q2 all turns off, and described battery BAT does not discharge.
In the present embodiment, when to be connected external ac power source incoming transport electricity with the second ac input end V2 by the first ac input end V1, the induced voltage produced at the secondary coil of transformer TR after the primary coil energising of transformer TR, when the induced voltage of the secondary coil of transformer TR is in positive half period, this induced voltage is by diode D1, first resistance R1 charges to described battery BAT, when the induced voltage of secondary coil is in negative half-cycle, the first end that this induced voltage exports the first electronic switch Q1 to drives the first electronic switch Q1 conducting, the first end of the second electronic switch Q2 is made to be low level, second electronic switch Q2 conducting, now battery BAT is by described second electronic switch Q2, second resistance R2 discharges, battery BAT is avoided to produce polarizing voltage, improve the charge efficiency of charging circuit, and, when the first ac input end V1 and the second ac input end V2 does not have incoming transport electricity, first electronic switch Q1 and the second electronic switch Q2 all turns off, battery BAT does not have discharge loop and does not discharge, and avoids the battery BAT when alternating current disconnected by charging circuit and discharges and exhaust the electricity of battery BAT.
Particularly, described first electronic switch Q1 is NPN triode, the base stage of described NPN triode is the first end of described first electronic switch Q1, second end of the very described first electronic switch Q1 of transmitting of described NPN triode, the 3rd end of the very described first electronic switch Q1 of current collection of described NPN triode.
Fig. 3 only for the first electronic switch Q1 for NPN triode, in another variant embodiment, described first electronic switch Q1 can also be NMOS tube, the grid of described NMOS tube is the first end of described first electronic switch Q1, the source electrode of described NMOS tube is second end of described first electronic switch Q1, and the drain electrode of described NMOS tube is the 3rd end of described first electronic switch Q1.
Particularly, described second electronic switch Q2 is PNP triode, the base stage of described PNP triode is the first end of described second electronic switch Q2, second end of the very described second electronic switch Q2 of transmitting of described PNP triode, the 3rd end of the very described second electronic switch Q2 of current collection of described PNP triode.
Fig. 3 only for the second electronic switch Q2 for PNP triode, in another variant embodiment, described second electronic switch Q2 can also be PMOS, the grid of described PMOS is the first end of described second electronic switch Q2, the source electrode of described PMOS is second end of described second electronic switch Q2, and the drain electrode of described PMOS is the 3rd end of described second electronic switch Q2.
Further, as shown in Figure 3, described charging circuit also comprises the 3rd resistance R3, and one end of described 3rd resistance R3 is connected with secondary coil second end of described transformer TR, and the other end of described 3rd resistance R3 is connected with the first end of described first electronic switch Q1.3rd resistance R3 is used for carrying out current limliting to the voltage signal of the first end being input to the first electronic switch Q1, is not burned to protect the first electronic switch Q1.
Further, as shown in Figure 3, described charging circuit also comprises the 4th resistance R4, and one end of described 4th resistance R4 and the three-terminal link of described first electronic switch Q1, the other end of described 4th resistance R4 is connected with the first end of described second electronic switch Q2.4th resistance R4 is used for carrying out current limliting to the voltage signal of the first end being input to the second electronic switch Q2, is not burned to protect the second electronic switch Q2.
The operation principle of the utility model charging circuit specifically describes as follows:
When the first ac input end V1 and the second ac input end V2 connects external power source incoming transport electricity, the primary coil energising of transformer TR, now the secondary coil of transformer TR produces induced voltage, when this induced voltage is in positive half period, this induced voltage exports the positive pole of battery BAT again to after diode D1 rectification through the first resistance R1, charge to battery BAT.When the induced voltage that the secondary coil of transformer TR produces is in negative half-cycle, this induced voltage exports the first end of the first electronic switch Q1 to through the 3rd resistance R3, the first end of the first electronic switch Q1 (i.e. the base stage of NPN triode or the grid of NMOS tube) is made to be high level, because second end (i.e. the emitter of NPN triode or the source electrode of NMOS tube) of now the first electronic switch Q1 is low level, thus the first electronic switch Q1 conducting, now the first end (i.e. the base stage of PNP triode or the grid of PMOS) of the second electronic switch Q2 is equivalent to the second end receiving the first electronic switch Q1 via the 4th resistance R4, thus the first end of the second electronic switch Q2 is also low level, and connect the positive pole of battery BAT due to second end (i.e. the emitter of PNP triode or the source electrode of PMOS) of the second electronic switch Q2, second end of the second electronic switch Q2 is high level, thus the second electronic switch Q2 also conducting.
After second electronic switch Q2 conducting, the negative pole of the 3rd end of the positive pole of battery BAT, second end of the second electronic switch Q2, the second electronic switch Q2, the second resistance R2, battery BAT forms a discharge loop, now battery BAT is discharged by the second electronic switch Q2, the second resistance R2, avoid battery BAT to produce polarizing voltage, reach unpolarized object.
When the first ac input end V1 and the second ac input end V2 does not have incoming transport electricity, the primary coil no power of transformer TR, correspondingly, the secondary coil of transformer TR does not produce induced voltage, and now the first electronic switch Q1 is because being in off state without driving voltage, and then the second electronic switch Q2 is also in off state, now, charging circuit discharge off loop, battery BAT does not discharge because not having discharge loop, thus the electricity of battery BAT can not be consumed.
The utility model also provides a kind of charger, and this charger comprises charging circuit, and all with reference to above-described embodiment, this is no longer going to repeat them for the circuit structure of this charging circuit, operation principle and the beneficial effect that brings.
Should be noted that; the technical scheme of each embodiment of the present utility model can be combined with each other; but must be can be embodied as basis with those skilled in the art; when technical scheme combination occur conflicting maybe cannot realize time people should think that the combination of this technical scheme does not exist, also not the utility model require protection range within.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a charging circuit, is characterized in that, comprises the first ac input end, the second ac input end, transformer, diode, the first resistance, the second resistance, battery, the first electronic switch and the second electronic switch;
The primary coil of described transformer connects described first ac input end and the second ac input end is electric with incoming transport, secondary coil one end of described transformer is connected with the first end of described first electronic switch and the negative pole of described battery respectively, the secondary coil other end of described transformer is connected with the second end of described first electronic switch, and is connected with the positive pole of described battery via described diode, the first resistance; The first end of described second electronic switch and the three-terminal link of described first electronic switch, second end of described second electronic switch is connected with the positive pole of described battery, and the 3rd end of described second electronic switch is connected with the negative pole of described battery via described second resistance; When incoming transport is electric and the induced voltage of the secondary coil of described transformer is in negative half-cycle, described induced voltage drives the first electronic switch conducting, and to drive the second electronic switch conducting, described battery is by described second electronic switch, the second conductive discharge; When not having incoming transport electricity, described first electronic switch and the second electronic switch all turn off, and described battery does not discharge.
2. charging circuit as claimed in claim 1, it is characterized in that, described first electronic switch is NPN triode, the base stage of described NPN triode is the first end of described first electronic switch, second end of very described first electronic switch of transmitting of described NPN triode, the 3rd end of very described first electronic switch of current collection of described NPN triode.
3. charging circuit as claimed in claim 1, it is characterized in that, described first electronic switch is NMOS tube, the grid of described NMOS tube is the first end of described first electronic switch, the source electrode of described NMOS tube is the second end of described first electronic switch, and the drain electrode of described NMOS tube is the 3rd end of described first electronic switch.
4. charging circuit as claimed in claim 1, it is characterized in that, described second electronic switch is PNP triode, the base stage of described PNP triode is the first end of described second electronic switch, second end of very described second electronic switch of transmitting of described PNP triode, the 3rd end of very described second electronic switch of current collection of described PNP triode.
5. charging circuit as claimed in claim 1, it is characterized in that, described second electronic switch is PMOS, the grid of described PMOS is the first end of described second electronic switch, the source electrode of described PMOS is the second end of described second electronic switch, and the drain electrode of described PMOS is the 3rd end of described second electronic switch.
6. as the charging circuit in claim 1 to 5 as described in any one, it is characterized in that, also comprise the 3rd resistance, one end of described 3rd resistance is connected with secondary coil second end of described transformer, and the other end of described 3rd resistance is connected with the first end of described first electronic switch.
7. as the charging circuit in claim 1 to 5 as described in any one, it is characterized in that, also comprise the 4th resistance, one end of described 4th resistance and the three-terminal link of described first electronic switch, the other end of described 4th resistance is connected with the first end of described second electronic switch.
8. a charger, is characterized in that, comprises the charging circuit in claim 1 to 7 described in any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520376432.2U CN204696770U (en) | 2015-06-03 | 2015-06-03 | Charging circuit and charger |
| PCT/CN2015/090264 WO2016192248A1 (en) | 2015-06-03 | 2015-09-22 | Charging circuit and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520376432.2U CN204696770U (en) | 2015-06-03 | 2015-06-03 | Charging circuit and charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204696770U true CN204696770U (en) | 2015-10-07 |
Family
ID=54237023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520376432.2U Expired - Fee Related CN204696770U (en) | 2015-06-03 | 2015-06-03 | Charging circuit and charger |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204696770U (en) |
| WO (1) | WO2016192248A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787041A (en) * | 2016-12-13 | 2017-05-31 | 深圳Tcl数字技术有限公司 | Battery charger and charging device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282010A (en) * | 2018-03-06 | 2018-07-13 | 北京小米移动软件有限公司 | Anticorrosion circuit and charger for charging interface |
| CN112491115A (en) * | 2020-11-25 | 2021-03-12 | 四川长虹电器股份有限公司 | Power supply management circuit for standby rechargeable battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2201750Y (en) * | 1994-03-21 | 1995-06-21 | 王勤 | Quick charger |
| JP2710575B2 (en) * | 1995-01-13 | 1998-02-10 | 埼玉日本電気株式会社 | Charging device |
| CN2393250Y (en) * | 1999-10-14 | 2000-08-23 | 李德华 | Sealed lead-acid accumulated battery repairing-charging device |
| CN2616690Y (en) * | 2002-12-31 | 2004-05-19 | 王志强 | Automobile oil-pump oil preheating and vehicular rapid charging apparatus |
| CN2686185Y (en) * | 2004-02-24 | 2005-03-16 | 张建兴 | Pulse charger |
-
2015
- 2015-06-03 CN CN201520376432.2U patent/CN204696770U/en not_active Expired - Fee Related
- 2015-09-22 WO PCT/CN2015/090264 patent/WO2016192248A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787041A (en) * | 2016-12-13 | 2017-05-31 | 深圳Tcl数字技术有限公司 | Battery charger and charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016192248A1 (en) | 2016-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20170603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |