CN104079032A - Wireless charging system for mobile phone - Google Patents

Wireless charging system for mobile phone Download PDF

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Publication number
CN104079032A
CN104079032A CN201410312147.4A CN201410312147A CN104079032A CN 104079032 A CN104079032 A CN 104079032A CN 201410312147 A CN201410312147 A CN 201410312147A CN 104079032 A CN104079032 A CN 104079032A
Authority
CN
China
Prior art keywords
mobile phone
coil
transmitting
receiving
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410312147.4A
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Chinese (zh)
Inventor
康凯
熊翼通
郑清友
宋佳敏
陈阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Electronic Science and Technology of China
Original Assignee
University of Electronic Science and Technology of China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Electronic Science and Technology of China filed Critical University of Electronic Science and Technology of China
Priority to CN201410312147.4A priority Critical patent/CN104079032A/en
Publication of CN104079032A publication Critical patent/CN104079032A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a wireless charging system for a mobile phone. The system specifically comprises a transmitting module and a receiving module. The transmitting module is located on a charging base. The receiving module is located on a mobile phone rear shell. The transmitting module comprises a transmitting coil and a transmitting circuit. The receiving module comprises a receiving coil and a receiving circuit. The transmitting coil is in corresponding coupling with the receiving coil, and the length of the receiving coil is larger than that of the transmitting coil. According the wireless charging system for the mobile phone, the current or the electric quantity of a charger is provided for a charging battery of an electronic device through inductive coupling, a primary coil is added into the wireless charger, meanwhile, a secondary coil is added into the electronic device, when alternative current passes through the primary coil, inductive current is generated in the secondary coil close to the primary coil, and therefore the charging battery can be charged and the operation of equipment charging is simplified. In addition, the mobile phone rear shell which the receiving module belongs to can protect the mobile phone when the mobile phone is not charged.

Description

A kind of wireless charging system for mobile phone
Technical field
The invention belongs to electronic communication field, be specifically related to a kind of design of the wireless charging system for mobile phone.
Background technology
At present, portable electron device has entered the every aspect in people's life, and make the generous radiance of portable electron device the adding of types of functionality such as communication, location, multimedia interaction, and representative is wherein exactly smart mobile phone.In all kinds of portable electron devices, all have rechargeable battery, take when user moves is electronic equipment power supply.Such portable electron device is equipped with the charger being used for specially as rechargeable battery charging individually, and charger is connected and charges with rechargeable battery again after being connected to common power by cable.In order to make charger provide charging current to the rechargeable battery of portable electron device, the rechargeable battery of charger and portable electron device must be by being electrically connected.For charger and portable electron device are electrically connected, in charger and portable electron device, corresponding connectivity port must be set respectively, this port inside is provided with corresponding conducting terminal, is used for electric energy transmitting.Yet, the conduction port of described charger and portable electron device inside, dust and introduced contaminants are easily invaded, and easily cause the loose contact between terminal
The object of electronic installation portability is to make user's use and more convenient to operate, yet traditional wired charging and this theory run in the opposite direction.
For above problem for above problem, occurred being at present coupled and the electric current of charger or electric weight being offered to the wireless charging mode of the rechargeable battery of electronic installation by induction, this wireless charging mode is by add a primary coil in wireless charger, in electronic equipment, increase secondary coil simultaneously, after primary coil has alternating current to pass through, with in the approaching secondary coil of primary coil, just produced induced current, and then can charge to rechargeable battery.It is feasible that this charging modes is applied to the general lower portable electron device of power consumption, and it has simplified the operation of equipment charge.
Summary of the invention
The object of the invention is provides a kind of wireless charging system for mobile phone in order to solve the problem that in prior art, mobile phone charging modes exists.
Technical scheme of the present invention is: a kind of wireless charging system for mobile phone, specifically comprises: transmitter module and receiver module, and described transmitter module is positioned at charging base, and receiver module is positioned at mobile phone battery cover;
Described transmitter module comprises transmitting coil and radiating circuit, and described receiver module comprises receiving coil and receiving circuit;
The corresponding coupling of described transmitting coil and receiving coil, the length of receiving coil is greater than the length of transmitting coil.
Further, described receiving coil is positioned at the wall of mobile phone battery cover, is square; Described transmitting coil is positioned at the wall of charging base, is square.
Further, described radiating circuit comprises mains supply interface, transmitting terminal regulator rectifier circuit, power tube drive circuit, power tube, transmitting coil match circuit, low pressure difference linear voltage regulator and transmitting terminal microcontroller; Described mains supply interface inserts commercial power socket, obtains 220V alternating current, obtains direct voltage, then arrives power tube by power tube drive circuit, and then arrive transmitting terminal transmitting coil through transmitting circle match circuit through regulator rectifier circuit; Another road of described regulator rectifier circuit meets low pressure difference linear voltage regulator LDO, and obtaining 3.3V burning voltage is the power supply of transmitting terminal microcontroller; Described transmitting terminal microcontroller, for the folding of power ratio control pipe, generates an electromagnetic field.
Further, described power tube is MOS field-effect transistor.
Further, described receiving circuit comprises receiving coil match circuit, receiving terminal regulator rectifier circuit and receiving terminal microcontroller, described receiving coil is subject to magnetic fields to produce induced current process receiver module match circuit to receiving terminal regulator rectifier circuit, obtains direct current and sends into the storage battery in mobile phone.
Further, described receiving terminal microcontroller, for detection of the state of charge in mobile phone accumulation pond, when mobile phone accumulation pond is full of after electricity, changes the resonance frequency of receiving coil and the frequency of operation of system, for the voltage on transmitting coil is changed; If described transmitting terminal microcontroller detects after the change in voltage on this transmitting coil, deenergization, stops charging.
The invention has the beneficial effects as follows: a kind of wireless charging system for mobile phone of the present invention, by induction, be coupled and the electric current of charger or electric weight offered to the rechargeable battery of electronic installation, in wireless charger, add a primary coil, in electronic equipment, increase secondary coil simultaneously, after primary coil has alternating current to pass through, with in the approaching secondary coil of primary coil, just produced induced current, and then can charge to rechargeable battery; It is feasible that this charging modes is applied to the general lower portable electron device of power consumption, and it has simplified the operation of equipment charge; And the mobile phone battery cover under receiver module also plays the function of protection mobile phone when uncharged; Charging base under transmitter module can keep being connected with supply socket for a long time, and without frequent plug, it automatically switches to the standby mode of low-power consumption in non-charged state; Charging base is the cavity type of a upper opening, and in the time of need to charging, it is chargeable that user only need put into mobile phone cavity.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of wireless charging system for mobile phone of the present invention;
Fig. 2 is a kind of wireless charging system mobile phone battery cover Facad structure schematic diagram for mobile phone of the present invention;
Fig. 3 is a kind of wireless charging system mobile phone battery cover structure schematic diagram for mobile phone of the present invention;
Fig. 4 is a kind of wireless charging system mobile phone battery cover Inside coil schematic diagram for mobile phone of the present invention;
Fig. 5 is that a kind of wireless charging system mobile phone battery cover for mobile phone of the present invention is combined schematic diagram with mobile phone;
Fig. 6 is a kind of wireless charging system charging base external structure schematic diagram for mobile phone of the present invention;
Fig. 7 is a kind of wireless charging system charging base internal structure schematic diagram for mobile phone of the present invention;
Fig. 8 is that a kind of wireless charging system for mobile phone of the present invention is implemented charging schematic diagram;
Fig. 9 is a kind of wireless charging system transmitting terminal circuit block diagram for mobile phone of the present invention;
Figure 10 is a kind of wireless charging system receiving terminal circuit block diagram for mobile phone of the present invention;
In figure: 1-mobile phone, 2-mobile phone battery cover, 3-charging base housing, 21-data-interface protection plug, 22-speaker port, 23-earphone interface protection plug, 24-volume key mouth, 25-power key mouth, the 26-draught animals of making a video recording, 27-receiving terminal circuit, 28-receiving coil, 31-power interface, 32-transmitting coil, 33-transmitting terminal circuit, 41-mains supply interface, 42-transmitting terminal regulator rectifier circuit, 43-power tube drive circuit, 44-power tube, 45-transmitting coil match circuit, 47-low pressure difference linear voltage regulator, 48-transmitting terminal microcontroller, 52-receiving coil match circuit, 53-receiving terminal regulator rectifier circuit, 54-receiving terminal microcontroller, 55-storage battery.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further elaborated.
The structured flowchart that is illustrated in figure 1 a kind of wireless charging system for mobile phone of the present invention, specifically comprises: transmitter module and receiver module, and described transmitter module is positioned at charging base, and receiver module is positioned at mobile phone battery cover;
Described transmitter module comprises transmitting coil and radiating circuit, and described receiver module comprises receiving coil and receiving circuit;
The corresponding coupling of described transmitting coil and receiving coil, the length of receiving coil is greater than the length of transmitting coil.
A kind of wireless charging system for mobile phone of the present invention is the storage battery power supply in mobile phone by adopting the mode of electromagnetic induction, can certainly be the storage battery power supply in other electronic equipments by this mode.Wherein, described transmitting coil and receiving coil are that plain conductor prolongs the multiturn that predetermined direction is wound and counts Stacked coil; Described receiving coil is positioned at the wall of mobile phone battery cover, is square; Described transmitting coil is positioned at the wall of charging base, is also square; Certainly the shape of receiving coil and transmitting coil also can be adjusted as the case may be, can realize the object that is coupled as of receiving coil and transmitting coil, adjusts accordingly.In the specific embodiment of the invention, charging base is the cavity type of a upper opening, and transmitting coil is positioned at the wall of this cavity, when user need to charge, only the mobile phone that mobile phone battery cover has been installed need be put into cavity and can charge.
For those skilled in the art can understand and implement technical solution of the present invention, below in conjunction with accompanying drawing, the application's scheme is elaborated:
Wireless charging system of the present invention is for the wireless charging of mobile phone, and it is divided into mobile phone battery cover 2 and charging base 3; Charging base 3 is connected with commercial power socket by power interface 31, and mobile phone battery cover 2 protects plug 21 to be connected with the rechargeable battery in mobile phone by data-interface, after switching on, produces magnetic field by transmitting coil, and then receiving coil generation induced current charges to rechargeable battery.
As shown in Fig. 2, Fig. 3 and Fig. 4, be respectively mobile phone wireless charging system mobile phone battery cover of the present invention front, the back side and inner coil configuration schematic diagram, receiving terminal circuit 27 and receiving coil 28 are contained in plastic cellphone back cover 2 inside, wherein receiving coil 28 is enclosed in the wall of mobile phone battery cover 2, and receiving terminal circuit 27 is enclosed in the bottom of mobile phone battery cover 2; Mobile phone data interface protection plug 21 and earphone interface of mobile phone protection plug 23 are contained in mobile phone battery cover 2 bottoms, and the two is flexibility with the junction of mobile phone battery cover 2, therefore can opening and closing.Described Mobile phone data interface protection plug 21 also plays the effect that connects mobile phone battery cover 2 and mobile phone accumulation pond except playing dustproof effect; on described Mobile phone data interface protection plug 21, contain power interface; one end of this power interface is connected with the data line interface of mobile phone (being storage battery in mobile phone), and the other end is connected with the output of the interior receiving circuit 27 of mobile phone battery cover 2.Meanwhile, in order to adapt to modern mobile phone, also contain speaker port 22, volume key mouth 24, power key mouth 25 and the shooting draught animals 26 etc. on mobile phone battery cover 2, its effect is and makes the some parts of mobile phone expose to be user-friendly to.
As shown in Figure 5, for mobile phone wireless charging system mobile phone battery cover of the present invention is combined schematic diagram with mobile phone, according to different mobile phone 1, each protection plug on mobile phone battery cover 2 all can change according to different mobile phones from the position of opening.
As shown in Figure 6, Figure 7, be respectively mobile phone wireless charging system charging base of the present invention inside and external structure schematic diagram, charging base contains a housing 3, has a power interface 31 on described housing 3, and it is connected with commercial power socket.Described transmitting coil 32 is positioned at the wall of housing 3, a cuboid cavity is contained in housing 3 bottoms, cavity contains radiating circuit pcb board 33, in embodiments of the present invention, housing adopts square realization, but in the specific implementation, the shape of transmitter module housing 300 can change according to different application environment.
As shown in Figure 8, for mobile phone wireless charging system of the present invention, implement charging schematic diagram, the length and width of mobile phone battery cover 2 are slightly less than the length and width of charging base 3.During charging, the mobile phone 1 that this mobile phone battery cover 2 is housed is put into the cavity of the charging base 3 that is inserted with power line, and made Mobile phone data interface protection plug 21 in inserting the state of data in mobile phone line interface, can start charging process.
As shown in Figure 9, be mobile phone wireless charging system transmitting terminal circuit block diagram of the present invention, described transmitting terminal circuit 33 is positioned at charging base 3.Described transmitting terminal circuit 33 comprises mains supply interface 41, transmitting terminal regulator rectifier circuit 42, power tube drive circuit 43, power tube 44, transmitting coil match circuit 45, low pressure difference linear voltage regulator (Low Dropout, LDO) 47 and transmitting terminal microcontroller 48; Described mains supply interface 41 inserts commercial power socket, obtains 220V alternating current, through regulator rectifier circuit 42, obtains direct voltage, and then arrives power tube 44 by power tube drive circuit 43, and then arrives transmitting coil 46 through match circuit 45.Described power tube 44 is metal-oxide-metal field-effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), its effect is to allow transmitting coil 46 obtain relatively high power, and acting as of described match circuit 45 makes transmitting coil 46 reach power match at resonance point.Another road of described transmitting terminal regulator rectifier circuit 42 meets LDO47, and it act as and obtains 3.3V burning voltage is microcontroller 48 power supplies.The square wave that described microcontroller 48 produces certain frequency is controlled the folding of MOSFET, is also alternation, and then generates an electromagnetic field thereby make the voltage on transmitting coil.
As shown in figure 10, be mobile phone wireless Charging receiving terminal circuit block diagram of the present invention, described receiving terminal circuit 27 is positioned at mobile phone battery cover 2.Described receiving circuit 27 comprises receiving coil match circuit 52, receiving terminal regulator rectifier circuit 53 and receiving terminal microcontroller 54.Described receiving coil 51 is subject to magnetic fields to produce induced current and arrives regulator rectifier circuit 53 through receiver module match circuit 52, obtains direct current and sends into the storage battery 55 in mobile phone.Detection storage battery 55 states that act as of described receiver module microcontroller 54, when storage battery 55 is full of, in receiving terminal microcontroller, can access extra electric capacity to change minutely the resonance frequency of receiving coil and the frequency of operation of system, thereby the voltage on transmitting coil is changed, the microcontroller 48 of transmitter module detects this change in voltage, disconnect charging path, make whole circuit working in low-power consumption resting state, charging finishes.To sum up, can find out that the present invention has realized the wireless charging of mobile phone, user is easy to use, and charging process is simple.In addition, because two-stage coil of the present invention is plug-in type coupling, therefore higher than the coil charges efficiency of existing planar structure.
Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not depart from essence of the present invention according to these technology enlightenments disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.

Claims (6)

1. for a wireless charging system for mobile phone, it is characterized in that, specifically comprise: transmitter module and receiver module, described transmitter module is positioned at charging base, and receiver module is positioned at mobile phone battery cover;
Described transmitter module comprises transmitting coil and radiating circuit, and described receiver module comprises receiving coil and receiving circuit;
The corresponding coupling of described transmitting coil and receiving coil, the length of receiving coil is greater than the length of transmitting coil.
2. a kind of wireless charging system for mobile phone as claimed in claim 1, is characterized in that, described receiving coil is positioned at the wall of mobile phone battery cover, is square; Described transmitting coil is positioned at the wall of charging base, is square.
3. a kind of wireless charging system for mobile phone as claimed in claim 1, it is characterized in that, described radiating circuit comprises mains supply interface, transmitting terminal regulator rectifier circuit, power tube drive circuit, power tube, transmitting coil match circuit, low pressure difference linear voltage regulator and transmitting terminal microcontroller; Described mains supply interface inserts commercial power socket, obtains 220V alternating current, obtains direct voltage, then arrives power tube by power tube drive circuit, and then arrive transmitting terminal transmitting coil through transmitting circle match circuit through regulator rectifier circuit; Another road of described regulator rectifier circuit meets low pressure difference linear voltage regulator LDO, and obtaining 3.3V burning voltage is the power supply of transmitting terminal microcontroller; Described transmitting terminal microcontroller, for the folding of power ratio control pipe, generates an electromagnetic field.
4. a kind of wireless charging system for mobile phone as claimed in claim 3, is characterized in that, described power tube is MOS field-effect transistor.
5. a kind of wireless charging system for mobile phone as claimed in claim 3, it is characterized in that, described receiving circuit comprises receiving coil match circuit, receiving terminal regulator rectifier circuit and receiving terminal microcontroller, described receiving coil is subject to magnetic fields to produce induced current process receiver module match circuit to receiving terminal regulator rectifier circuit, obtains direct current and sends into the storage battery in mobile phone.
6. a kind of wireless charging system for mobile phone as claimed in claim 5, it is characterized in that, described receiving terminal microcontroller is for detection of the state of charge in mobile phone accumulation pond, when mobile phone accumulation pond is full of after electricity, change the resonance frequency of receiving coil and the frequency of operation of system, for the voltage on transmitting coil is changed; If described transmitting terminal microcontroller detects after the change in voltage on this transmitting coil, deenergization, stops charging.
CN201410312147.4A 2014-07-02 2014-07-02 Wireless charging system for mobile phone Pending CN104079032A (en)

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CN104836285A (en) * 2015-04-30 2015-08-12 成都迈奥信息技术有限公司 Portable intelligent watch charging base
CN105244972A (en) * 2015-11-09 2016-01-13 芜湖华宇彩晶科技有限公司 Electromagnetic conversion charging system
CN106877529A (en) * 2017-04-14 2017-06-20 京东方科技集团股份有限公司 A kind of noncontact power receiving system and noncontact electric power dispensing device
CN108123507A (en) * 2016-11-29 2018-06-05 佑骅科技(深圳)有限公司 A kind of portable wireless power transfering device
CN108649672A (en) * 2018-04-26 2018-10-12 Oppo广东移动通信有限公司 Wireless charging circuit and wearable device
CN109109676A (en) * 2017-06-22 2019-01-01 比亚迪股份有限公司 Vehicle-mounted wireless charging device and vehicle with the charging unit

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104836285A (en) * 2015-04-30 2015-08-12 成都迈奥信息技术有限公司 Portable intelligent watch charging base
CN105244972A (en) * 2015-11-09 2016-01-13 芜湖华宇彩晶科技有限公司 Electromagnetic conversion charging system
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CN106877529B (en) * 2017-04-14 2019-06-28 京东方科技集团股份有限公司 A kind of non-contact power receiving system and non-contact electric power sending device
CN109109676A (en) * 2017-06-22 2019-01-01 比亚迪股份有限公司 Vehicle-mounted wireless charging device and vehicle with the charging unit
CN108649672A (en) * 2018-04-26 2018-10-12 Oppo广东移动通信有限公司 Wireless charging circuit and wearable device

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