CN109888863A - A kind of wireless power transmission system for charging the battery - Google Patents
A kind of wireless power transmission system for charging the battery Download PDFInfo
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- CN109888863A CN109888863A CN201910131524.7A CN201910131524A CN109888863A CN 109888863 A CN109888863 A CN 109888863A CN 201910131524 A CN201910131524 A CN 201910131524A CN 109888863 A CN109888863 A CN 109888863A
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- coil
- switch
- battery
- charging
- wireless power
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Abstract
Disclosed herein a kind of wireless power transmission systems for charging the battery, including transmitting terminal and receiving end, the transmitting terminal includes inverter, the transmitting end-coil being connect with the inverter, the receiving end includes two or more reception end-coils, with described two or more than two rectifiers for receiving end-coil and connecting, with DC/DC converter, one end of the DC/DC converter connects the rectifier, the other end is for connecting the battery, wherein the transmitting terminal coil is coupled with described two or more than two reception end-coils respectively.Wireless power transfer efficiency can be improved in the present invention.
Description
Technical field
The present invention relates to wireless charging technical field more particularly to a kind of wireless power transfer systems for charging the battery
System.
Background technique
Intelligent bracelet has been widely used for continuing to monitor human body signal, grinds for traffic safety, health and medical treatment
Study carefully.Intelligent bracelet needs to wear for a long time to continue to monitor signal.When charging is required, then use must be interrupted to charge,
This brings inconvenience to using.Wireless charging technology for Intelligent bracelet makes charging more convenient, improves the charge bulk of user
It tests.
As shown in Figure 1, traditional wireless power transmission system includes transmitting terminal and receiving end, transmitting terminal includes inversion
Device, transmitting terminal matching capacitance CTX, transmitting end-coil LTX, receiving end includes receiving end-coil LRX, receiving end matching capacitance CRX, it is whole
Flow device, DC/DC converter and battery.Wherein only one transmitting coil of transmitting terminal and only one receiving coil of receiving end, institute
Transmitting coil and receiving coil are stated by inductive coupling come transimission power transmission.Because the volume very little of Intelligent bracelet, connects
The volume of take-up circle and the volume of battery are also inevitable small.The battery and receiving coil of small size can bring high load impedance, from
And cause the radio transmission efficiency of Intelligent bracelet low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of wireless power transmission systems for charging the battery, in electricity
Pond and receiving coil volume are improved the efficiency of transmission of wireless power transmission system by limited time.
To solve the above problems, this application provides a kind of wireless power transmission systems for charging the battery, including
Transmitting terminal and receiving end, the transmitting terminal include inverter, the transmitting end-coil connecting with the inverter, the receiving end packet
Two or more reception end-coils are included, the rectifiers being connect with described two or more than two reception end-coils, and
DC/DC converter, one end of the DC/DC converter connect the rectifier, and the other end is used to connect the battery, wherein institute
Transmitting end-coil is stated to couple with described two or more than two reception end-coils respectively.
Further, receiving end includes two reception end-coils, is first coil and the second coil respectively, wherein the transmitting
End-coil is coupled with the first coil and second coil respectively.
Further, the receiving end further includes the first switch being connected between the first coil and the rectifier,
And the second switch being connected between second coil and the rectifier, wherein the first switch and described second
Switch controls the opening and closing of first coil and the second coil respectively.
Further, the transmitting terminal further includes the transmitting terminal being connected between the inverter and the transmitting end-coil
With capacitor.
Further, the receiving end further includes the receiving end being connected between the first switch and the first coil
The second capacitor is matched with first capacitor and the receiving end being connected between the second switch and second coil.
Further, the first switch is field-effect tube S1, source electrode passes through the first capacitor and connects the First Line
Circle, the second switch are field-effect tube S2, source electrode passes through the second coil described in second capacitance connection, the field-effect
Pipe S1With the field-effect tube S2Drain electrode connection, and connect one end of inductive reactance Rsen, the inductive reactance Rsen's is another
End ground connection.
Further, the wireless power transmission system for charging the battery includes control circuit, the control circuit
Pass through input voltage VS1And VS2Control the first switch and the second switch.
Further, the control circuit passes through input voltage VS1And VS2The first switch and the second switch is controlled to interlock
It opens or closes.
Further, the control circuit includes comparator, the frequency divider connecting with the comparator, Power MOSFET,
And driver, wherein one end of driver connects VS1And VS2, and according to VS1And VS2The first switch and second is controlled respectively to open
It closing, the other end of driver connects the dead zone function time, and an output of Power MOSFET is directly connected to frequency divider, another
Output connects frequency divider by diode, and the positive output of the comparator is connected to field-effect tube S1With field-effect tube S2Drain electrode
Between inductive reactance Rsen, negative output ground connection.
Further, the VS1And VS2For staggered duty cycle signals.
The one aspect of the application uses two receiving coils (first coil and the second coil), and uses interleaved switching
(first switch and the second switch) controls two receiving coils respectively, makes double reception coil working under staggeredly opening mode.This
Invention makes the energy of transmitting coil accumulation while being respectively transmitted on two small coils of receiving end, even if in high load impedance
Under, the wireless power transfer efficiency of charging system can also be greatly improved.
Under the premise of area is constant, system effectiveness can not be influenced the system by load impedance, can pass through control
The duty ratio of interleaved switching (first switch and the second switch) obtains higher effect at baby battery (under higher load impedance)
Rate.Compared with traditional single receiving line circle (2cm × 5cm), the system by split into two small receiving coils (2cm ×
2.5cm), system effectiveness can promote 6.67%.
Detailed description of the invention
Fig. 1 traditional unicoil wireless power transmission system schematic diagram.
Fig. 2 is the wireless power transmission system schematic diagram for charging the battery of the application one embodiment.
Fig. 3 is receiving end and the control of the wireless power transmission system for charging the battery of the application one embodiment
Circuit diagram.
Specific embodiment
Embodiments of the present invention are further disclosed with reference to the accompanying drawing, keep its technology contents more clear and convenient for reason
Solution.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention is not limited only to text
In the embodiment mentioned.
As shown in Fig. 2, the application discloses one kind for giving the charging wireless power transmission system of battery 4, including transmitting terminal 1
With receiving end 2, wherein transmitting terminal 1 includes inverter 11, the transmitting end-coil 13 connecting with inverter 11；Receiving end 2 includes two
A or more than two reception end-coils, with described two or more than two rectifiers 27 and DC/ for receiving end-coil and connecting
DC converter 28, one end of DC/DC converter 28 connect rectifier 27, and the other end is for connecting battery 4, wherein emitting end-coil
13 couple with two or more reception end-coils.Transmitting terminal 1 further includes being connected to inverter 11 and transmitting end-coil 13
Between transmitting terminal matching capacitance 12.
In one embodiment, receiving end includes two reception end-coils, is first coil L respectivelyRX121 and second coil
LRX222, it is connected respectively to rectifier 27, wherein.Wherein, wherein the transmitting terminal coil 13 respectively with the first coil 21
It is coupled with second coil 22.Receiving end 2 further includes the first switch 25 being connected between first coil 21 and rectifier 27,
And the second switch 26 being connected between the second coil 22 and rectifier 27, wherein first switch 25 and second switch 26 are controlled respectively
First coil L processedRX1The 21 and second coil LRX222 opening and closing.Wherein, receiving end 2 further includes being connected to first switch 25
Receiving end between first coil 21 matches first capacitor CRX1It 23 and is connected between second switch 26 and the second coil 22
Receiving end matches the second capacitor CRX224.First coil LRX1The 21 and second coil LRX222 couple with transmitting end-coil 13, and will connect
The energy received exports electric energy by rectifier and DC/DC converter and charges to battery 4.
As shown in figure 3, not limiting in example specifically at one, first switch 25 is field-effect tube S1, source electrode passes through
First capacitor CRX123 connection first coils 21, second switch 26 are field-effect tube S2, source electrode pass through the second capacitor CRX224 connect
Meet the second coil 22, field-effect tube S1With field-effect tube S2Drain electrode connection, and connect one end of inductive reactance Rsen, induced electricity
Hinder the other end ground connection of Rsen.Rectifier 27 includes four diodes 271, and 272,273,274, it is in parallel after connecting two-by-two, and again
It is in parallel with a capacitor.Wherein, first coil 21 connects field-effect tube S1Source electrode, and be connected to concatenated 271 He of diode
272 centre, the second coil 22 connect field-effect tube S2Source electrode, and be connected in concatenated diode 273 and 274
Between.DC/DC converter 28 is the BUCK conversion circuit in Fig. 3, including two concatenated field-effect tube 281 in one embodiment
With 282, the wherein source electrode of the drain electrode connection field-effect tube 282 of field-effect tube 281, two concatenated field-effect tube 281 and 282
It is in parallel with concatenated diode 271 and 272, wherein battery 4 is in parallel with field-effect tube 282.BUCK conversion circuit further include with electricity
The capacitor 284 in parallel of pond 4, capacitor are connect with the intermediate point of two concatenated field-effect tube 281 and 282 by inductance 283.In this way
Interleaved switching S1And S2Two-way receiving coil is controlled, the energy received exports the direct current of 5V by rectifier and Buck converter
To battery.
The wireless power transmission system for charging the battery further includes control circuit 3, and the control circuit passes through
Input voltage VS1And VS2Control first switch 25 and second switch 26.Control circuit 3 includes comparator 31, is connected with comparator 31
The frequency divider 32 connect, Power MOSFET 33 and driver 34, wherein one end of driver connects staggered duty cycle signals VS1
And VS2, and according to VS1And VS2First switch 25 and second switch 26 are controlled, the other end of driver connects the dead zone function time,
One output of Power MOSFET is directly connected to frequency divider, another output connects frequency divider by diode 35, and frequency dividing can
To provide reasonable dead time, Power MOSFET can prevent hard switching.The positive output of comparator 31 is connected to field-effect
Pipe S1With field-effect tube S2Drain electrode and inductive reactance Rsen between, negative output ground connection.Inductive reactance Rsen and comparator are for the
22 (L of one coil 21 and the second coilRX1And LRX2) zero current detection.By frequency divider to the frequency dividing of comparator output signal.
Staggered duty cycle signals Vs1And Vs2Interleaved switching (first switch 25 and second switch are driven by gate drive circuit respectively
26), staggeredly mean that first switch and the second switch is staggeredly opened, one is opened a closing, and the time can respectively stand 50%.One
In a embodiment, staggered duty cycle signals are adjustable.
Pass through double reception coil (LRX1And LRX2) work under staggeredly opening mode (first switch 25 or second switch 26),
The energy of transmitting coil accumulation can be respectively transmitted to the coil (L two small of receiving end by the system simultaneously simultaneouslyRX1And LRX2)
On.Importantly, even if efficiency of transmission can also be greatly improved under high load impedance.It is received with traditional list
Coil (2cm × 5cm) is compared, and for the system by splitting into two small receiving coils (2cm × 2.5cm), system effectiveness can be with
Promote 6.67%.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of wireless power transmission system for charging the battery, which is characterized in that described including transmitting terminal and receiving end
Transmitting terminal includes inverter, and the transmitting end-coil connecting with the inverter, the receiving end includes two or more
End-coil is received, with described two or more than two rectifiers and DC/DC converter for receiving end-coil and connecting, the DC/
One end of DC converter connects the rectifier, the other end for connecting the battery, wherein the transmitting terminal coil respectively with
Described two or more than two reception end-coil couplings.
2. the wireless power transmission system for charging the battery as described in right item 1, which is characterized in that receiving end includes two
A reception end-coil, is first coil and the second coil respectively, wherein the transmitting terminal coil respectively with the first coil and
The second coil coupling.
3. the wireless power transmission system for charging the battery as described in right item 2, which is characterized in that the receiving end is also
Including the first switch being connected between the first coil and the rectifier, and it is connected to second coil and described whole
The second switch between device is flowed, wherein the first switch and the second switch control first coil and the second line respectively
The opening and closing of circle.
4. the wireless power transmission system for charging the battery as described in right item 2, which is characterized in that the transmitting terminal is also
Including the transmitting terminal matching capacitance being connected between the inverter and the transmitting end-coil.
5. the wireless power transmission system for charging the battery as described in right item 3, which is characterized in that the receiving end is also
Including the receiving end matching first capacitor being connected between the first switch and the first coil and it is connected to described second
Receiving end between switch and second coil matches the second capacitor.
6. the wireless power transmission system for charging the battery as described in right item 3, which is characterized in that the first switch
For field-effect tube S1, source electrode is field-effect tube S by the first capacitor connection first coil, the second switch2,
Its source electrode passes through the second coil described in second capacitance connection, the field-effect tube S1With the field-effect tube S2Drain electrode connect
It connects, and connects one end of inductive reactance Rsen, the other end ground connection of the inductive reactance Rsen.
7. the wireless power transmission system for charging the battery as described in right item 6, which is characterized in that including control electricity
Road, the control circuit pass through input signal VS1And VS2Control the first switch and the second switch.
8. the wireless power transmission system for charging the battery as described in right item 7, which is characterized in that the control circuit
Pass through input signal VS1And VS2It controls the first switch and the second switch staggeredly opens or closes.
9. the wireless power transmission system for charging the battery as described in right item 8, which is characterized in that the control circuit
Including comparator, the frequency divider connecting with the comparator, Power MOSFET and driver, wherein one end of driver connects
Meet VS1And VS2, and according to VS1And VS2The first switch and the second switch are controlled respectively, and the other end connection of driver is dead
Area controls the time, and an output of Power MOSFET is directly connected to frequency divider, another output is connected by diode to be divided
Device, the positive output of the comparator are connected to field-effect tube S1With field-effect tube S2Drain electrode and inductive reactance Rsen between, bear defeated
It is grounded out.
10. the wireless power transmission system for charging the battery as described in right item 7 or 8 or 9, which is characterized in that described
VS1And VS2For staggered duty cycle signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910131524.7A CN109888863A (en) | 2019-02-22 | 2019-02-22 | A kind of wireless power transmission system for charging the battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910131524.7A CN109888863A (en) | 2019-02-22 | 2019-02-22 | A kind of wireless power transmission system for charging the battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109888863A true CN109888863A (en) | 2019-06-14 |
Family
ID=66928874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910131524.7A Withdrawn CN109888863A (en) | 2019-02-22 | 2019-02-22 | A kind of wireless power transmission system for charging the battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN109888863A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262349A (en) * | 2019-09-04 | 2020-06-09 | 西南交通大学 | Double-pickup-coil wireless energy transfer device based on full-bridge voltage-multiplying rectifier and magnetic coupling mechanism design method |
| CN113410918A (en) * | 2021-07-26 | 2021-09-17 | 杭州电子科技大学温州研究院有限公司 | Current type wireless power transmission system with double receiving coils |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753150A (en) * | 2015-03-24 | 2015-07-01 | 华南理工大学 | Electric vehicle advancing type wireless charging device and control method thereof |
| CN105990888A (en) * | 2014-08-20 | 2016-10-05 | 三星电机株式会社 | Non-contact type power receiving apparatus |
| KR20170071604A (en) * | 2014-10-22 | 2017-06-23 | 파워바이프록시 리미티드 | A converter |
| US10044229B2 (en) * | 2006-01-31 | 2018-08-07 | Mojo Mobility, Inc. | Efficiencies and flexibilities in inductive charging |
| CN108923509A (en) * | 2018-07-06 | 2018-11-30 | 维沃移动通信有限公司 | A kind of wireless charging transmit circuit, wireless charging receive circuit and method |
-
2019
- 2019-02-22 CN CN201910131524.7A patent/CN109888863A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10044229B2 (en) * | 2006-01-31 | 2018-08-07 | Mojo Mobility, Inc. | Efficiencies and flexibilities in inductive charging |
| CN105990888A (en) * | 2014-08-20 | 2016-10-05 | 三星电机株式会社 | Non-contact type power receiving apparatus |
| KR20170071604A (en) * | 2014-10-22 | 2017-06-23 | 파워바이프록시 리미티드 | A converter |
| CN104753150A (en) * | 2015-03-24 | 2015-07-01 | 华南理工大学 | Electric vehicle advancing type wireless charging device and control method thereof |
| CN108923509A (en) * | 2018-07-06 | 2018-11-30 | 维沃移动通信有限公司 | A kind of wireless charging transmit circuit, wireless charging receive circuit and method |
Non-Patent Citations (1)
| Title |
|---|
| 曹丰文: "《电子电力技术基础》", 31 August 2007 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111262349A (en) * | 2019-09-04 | 2020-06-09 | 西南交通大学 | Double-pickup-coil wireless energy transfer device based on full-bridge voltage-multiplying rectifier and magnetic coupling mechanism design method |
| CN113410918A (en) * | 2021-07-26 | 2021-09-17 | 杭州电子科技大学温州研究院有限公司 | Current type wireless power transmission system with double receiving coils |
| CN113410918B (en) * | 2021-07-26 | 2022-05-27 | 杭州电子科技大学温州研究院有限公司 | Current type wireless power transmission system with double receiving coils |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190614 |