WO2020000672A1

WO2020000672A1 - Coil module charging circuit, two sets of coil module charging circuits, and charger

Info

Publication number: WO2020000672A1
Application number: PCT/CN2018/105325
Authority: WO
Inventors: 姚国年
Original assignee: 深圳市亿品奇科技有限公司
Priority date: 2018-06-26
Filing date: 2018-09-12
Publication date: 2020-01-02
Also published as: CN208369270U

Abstract

Disclosed are a coil module charging circuit, two sets of coil module charging circuits and a charger, each set of coil module charging circuits comprising a power supply unit, a driving unit, a resonance capacitor, an output feedback unit, a control unit and a coil module, wherein the coil module comprises a pair of transmitting coils overlapped with each other, the transmitting coils are electrically connected to the driving unit, the resonance capacitor and the control unit respectively, the driving unit is electrically connected to the control unit, and the output feedback unit is electrically connected to the transmitting coils, the resonance capacitor and the control unit. The two sets of coil module charging circuits can be in mutual communication with each other. When a power supply is connected, the coil module charging circuit with two transmitting coils as a group is used, so that when one mobile phone is charged wirelessly, the problem of the difficulty in alignment during charging by a single-coil wireless charger is effectively improved, and the user experience of wireless charging is improved. Information coordination between two wireless charging circuits is realized by means of the control unit, so that the mutual interference between the two wireless chargers is improved, thereby realizing charging of two mobile phones at the same time.

Description

Specification Invention Name: Coil Module Charging Circuit, Two Coil Module Charging Circuits and Charger Technical Field

[0001] The present invention relates to the field of wireless charging, and in particular, to a coil module charging circuit, two sets of coil module charging circuits, and a charger.

Background technique

[0002] With the advent of smart phones, people are using mobile phones more and more frequently, and people ’s love for mobile phones has also increased. With the continuous upgrading of mobile phones, the functions of mobile phones have become more and more powerful, and the capacity of mobile phone batteries has restricted the single use time of smartphones. Repeated plugging and unplugging of charging cables not only easily damages the charger, but also annoys users. If you use two different models of mobile phones, you need to carry two charging cables, which is very inconvenient. With the development of wireless charging technology, the above problems are solved, which greatly facilitates the charging of mobile phones, so that people do not need to worry about different interfaces. However, users often carry multiple electronic devices with them in a mobile environment, such as two or more mobile phones, tablets, etc. When two or more electronic devices need to be charged, users usually use a wireless charger to One electronic device is charged. After the charging is completed, the other electronic device is charged. The charging time is too long, and the user cannot use a wireless charger to charge two electronic devices at the same time. In response to this problem, most users will use two wireless chargers to charge two electronic devices at the same time. Carrying two wireless chargers will cause inconvenience to users in a mobile environment. The number is large, and it is easy to lose. In the technology, two electronic devices can be charged by setting two charging areas, but there is a blind zone between the two charging areas. In this way, when the mobile phone is placed, it needs to be placed on a specific area to be charged.

technical problem

[0003] In view of the shortcomings in the above technology, the present invention provides a dual-transmitting coil charging circuit, two sets of dual-transmitting coil charging circuits, and a charger, which can realize a transmitting coil and a mobile phone when charging a mobile phone. The large-area effective area of the electronic product corresponding to the receiving coil is precisely aligned, and the operation is simple and convenient, which effectively improves the effectiveness of the wireless charging operation, and can charge multiple mobile phones at the same time.

Problem solution

Technical solutions [0004] To achieve the above object, the present invention provides a coil module charging circuit, which includes a control unit, a driving unit, a resonance capacitor, an output feedback unit, and a coil module. The coil module includes a pair of transmitters superimposed on each other. A coil, the transmitting coil is electrically connected to a driving unit, a resonance capacitor, and a control unit, the driving unit is electrically connected to the control unit, and the output feedback unit is electrically connected to the transmitting coil, the resonance capacitor, and the control unit. When the control unit controls the driving unit, the resonance capacitor and the input feedback unit to periodically send an electromagnetic field signal to each of the transmitting coils;

[0005] After the transmitting coil senses the feedback signal sent by the receiving line coil of the external mobile phone, the feedback signal is transmitted to the control unit through the output feedback unit, and the control unit recognizes the contact area with the receiving coil according to the feedback signal The largest transmitting coil controls the continuous transmission of electromagnetic energy from the driving circuit, thereby charging the mobile device, and disabling another transmitting coil through the driving unit.

[0006] Wherein, the output feedback unit includes an output terminal and an input terminal, and a V-BACK terminal formed by the transmitting coil and the resonant capacitor is electrically connected to the input terminal of the output feedback unit, and the output terminal of the output feedback unit and the control The CODE1 terminal of the unit is electrically connected.

[0007] Wherein, the transmitting coils are first and second transmitting coils, the resonant capacitor includes first and second resonant capacitors, a first end of the first transmitting coil and a first One end is electrically connected, the first end of the second transmitting coil is electrically connected to the first end of the second resonance capacitor, and the input end of the driving unit is electrically connected to the first and second resonance capacitors, respectively, and The output terminals of the driving unit are electrically connected to the first and second transmitting coils respectively and then grounded.

[0008] Wherein, the driving unit includes an amplifying unit and a switching unit, and a control terminal of the amplifying unit is connected to a PWM signal terminal of the control unit, and is configured to amplify the voltage from the PWM of the control unit, and the amplifying The output terminal of the unit is electrically connected to the control terminal of the switching unit, and is used to control the conduction or disabling of the switching unit. The switching unit is respectively connected to the input terminals of the first and transmitting coils, and is also electrically connected to the first And the output terminal of the second resonant capacitor.

[0009] Wherein, the switch unit is provided with a first mosfet tube and a second mosfet tube, the first mosfet-end is connected to an input power source, the other end is connected to the input ends of the first and second coils, and one end of the second mosfet tube接地 Connect the first or second coil to ground.

[0010] It further includes a power supply unit, which is connected to the control unit, the drive unit, the resonance capacitor, and the output feedback unit, and is configured to supply power. [0011] Wherein, a power supply filtering unit is further included, and an input end of the power supply filtering unit is electrically connected to an input end of the control unit for ensuring stable power supply.

[0012] It also includes a power supply adaptation unit, which is electrically connected to the EN1 and EN2 ports of the control unit, and is used to determine when an external mobile device complies with the fast charging standard, so as to choose whether to fasten it. Charge or normal charge.

[0013] The present invention also provides two sets of coil module charging circuits, including the coil module charging circuit described in any one of the above, wherein the transmitting coils of each group of coil module charging circuits are superimposed on each other, and each group of coil modules The control units of the group charging circuit communicate with each other. When an external receiving coil is felt, each control unit receives a feedback signal of a corresponding transmitting coil, and the control units communicate with each other, and judges the contact area with the receiving coil according to the signal. The largest transmitting coil, and controlling the current of the transmitting coil to be continuously conducted, so as to charge the mobile device;

[0014] When there are two receiving coils, the control unit of the wireless charging circuit of each group of dual transmitting coils controls the current of the two transmitting coils that are not in contact with each other to be continuously conducted, thereby charging the two mobile devices respectively.

[0015] The utility model also provides a wireless charger, at least one of the two sets of coil wire charging circuits described above, further comprising a housing, wherein a cavity is provided in the housing, and a placing area is provided on the upper surface. The two sets of coil module charging circuits are placed in the casing, and the transmitting coil is disposed on the side opposite to the placement area. The casing is provided with a power connection port, and the power connection port is connected to the The control unit is electrically connected. The beneficial effects of the invention

Beneficial effect

[0016] The beneficial effects of the present utility model are: compared with the prior art, the coil module charging circuit, the two sets of coil module charging circuits, and the charger provided by the present utility model use two transmitting coils as a set of charging circuits Communication between multiple sets of dual-transmitting coil circuits can enable a mobile phone to charge a large area of effective charging area corresponding to the receiving coil of the transmitting coil and electronic products such as the mobile phone, achieve precise alignment, and improve the failure of wireless charging operations. And experience, improve wireless charging efficiency, and can charge multiple mobile phones at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a partial structural diagram of the present invention;

[0018] FIG. 2 is an overall structural diagram of the present invention;

[0019] FIG. 3 is a schematic structural diagram of the present invention; [0020] FIG. 4 is a circuit diagram of a control unit of the present invention;

5a is a circuit diagram of a first amplification unit of the present invention;

[0022] FIG. 5b is a circuit diagram of a second amplification unit of the present invention;

5c is a circuit diagram of a third amplification unit of the present invention;

6a is a circuit diagram of a first switch unit of the present invention;

6b is a circuit diagram of a second switching unit of the present invention;

6c is a circuit diagram of a third switching unit of the present invention;

[0027] FIG. 7 is a circuit diagram of a transmitting coil and a resonance capacitor of the present invention;

[0028] FIG. 8 is a circuit diagram of an output feedback unit of the present invention;

9 is a partial exploded view of a charger of the present invention.

[0030] The main element symbols are explained as follows:

[0031] 1. Control unit 2. Drive unit

[0032] 3. Output feedback unit 4. Transmitting coil

[0033] 5 resonance capacitor 6, power supply unit

[0034] 21, amplifying unit 22, switching unit

[0035] 211, a first amplification unit 212, a second amplification unit

[0036] 213, the third amplification unit 221, the first switching unit

[0037] 222, second switching unit 223, third switching unit

401, a first transmitting coil 402, a second transmitting coil

[0039] 6, power supply unit 7, power filter unit

[0040] 8, power supply adaptation unit 9, housing

[0041] 10. Voltage stabilization unit.

Invention Examples

Embodiments of the invention

[0042] In order to express the utility model more clearly, the utility model is further described below with reference to the accompanying drawings.

[0043] Referring to FIG. 9 and FIG. 2, the utility model discloses a wireless charger, which includes a case 9, a cavity is provided in the case 9, a placement area 91 is provided on the upper surface, and a power connection is provided on the case. The port 92 and the power-receiving port 92 are connected to a power source through a wire. The housing is provided with two sets of coil module charging circuits. Four transmitting coils 4 are superimposed on each other, and the transmitting The coil 4 is disposed on a side opposite to the placement area, so that the overall effective charging area of the transmitting coil 4 becomes larger, and the receiving coil of the mobile phone is easier to align with the transmitting coil 4 to improve the timeliness and experience of wireless charging operation. A set of coil module charging circuits is formed between two adjacent transmitting coils, so that when the mobile phone is erected on the charger placement area 91, two mobile phones can be charged at the same time. Specifically, in this embodiment, two sets of coil module charging circuits are composed of two coil module charging circuits, and the transmitting coils 4 of each set of coil module charging circuits are superimposed on each other, that is, the four transmitting coils 4 are superimposed on each other, each The control units 1 of the charging circuit of the group coil module communicate with each other. When an external receiving coil is felt, each control unit 1 receives a feedback signal of the corresponding transmitting coil 4, and the control units 1 communicate with each other, and judges with the feedback signal. The transmitting coil 4 with the largest contact area of the receiving coil, and controls the current of the transmitting coil 4 to be continuously conducted, so as to charge the mobile device;

[0044] When there are two receiving coils, that is, when charging two mobile phones, the control unit 1 of the wireless charging circuit of each group of dual transmitting coils 4 controls the current of the two transmitting coils 4 that are not in contact with each other to be continuously conducted, preferably Ground, the mobile phones are charged separately for the two transmitting coils 4 in the charger, so that the interference between the transmitting coils 4 is minimized, and two mobile devices are charged.

[0045] Specifically, referring to FIG. 1 and FIG. 2, in this embodiment, a coil module charging circuit is described. A coil module charging circuit includes a control unit 1, a driving unit 2, a resonance capacitor 5, and an output. The feedback unit 3 and the coil module 4, the coil module 4 includes a pair of transmitting coils superimposed on each other, that is, the transmitting coil 4, the transmitting coil 4 is electrically connected to the driving unit 2, the resonance capacitor 5, and the control unit 1, respectively, and the driving unit 2 and The control unit 1 is electrically connected, and the output feedback unit 3 is electrically connected to the transmitting coil 4, the resonance capacitor 5, and the control unit 1. When the power is connected, the control unit 1 controls the driving unit 2, the resonance capacitor 3, and the input feedback unit 3 periodically. Send the electromagnetic field signal to the transmitting coil;

[0046] When the transmitting coil 4 senses a feedback signal sent by a receiving coil (not shown) of an external mobile phone, the feedback signal is transmitted to the control unit 1 through the output feedback unit 3, and the control unit 1 recognizes and receives the feedback signal based on the feedback signal. The transmitting coil 4 with the largest coil contact area controls the electromagnetic energy of the driving circuit 2 to continuously transmit, thereby charging the mobile device, and disabling the other transmitting coil 4 through the driving unit 2.

[0047] In this embodiment, as shown in FIG. 2, the transmitting coil 4 is a first transmitting coil 41 and a second transmitting coil 42, the resonant capacitor 5 includes a first resonant capacitor 51 and a second resonant capacitor 52, and the first transmitting coil The first end of 42 is electrically connected to the first end of the first resonant capacitor 501, and the first end of the second transmitting coil 42 is connected to the second resonant capacitor 502 The first terminal of the driving unit 2 is electrically connected to form a resonance unit. The input terminal of the driving unit 2 is electrically connected to the first resonance capacitor 51 and the second resonance capacitor 52 respectively. The output terminal of the driving unit 2 is respectively connected to the first transmitting coil 41 and the second transmitting unit. The coil 42 is electrically connected and then grounded, so that the driving unit 2 is connected to the first transmitting coil 41, the second transmitting coil 42, the first resonant capacitor 51, and the second resonant capacitor 52, and controls the magnitude of the electromagnetic energy passing through it.

[0048] In this embodiment, referring to FIG. 3 to FIG. 6, the driving unit 2 includes an amplifying unit 21 and a switching unit 22, and a control terminal of the amplifying unit 21 is connected to a PWM signal terminal of the control unit 1 for The PWM of 1 performs voltage amplification. The output terminal of the amplification unit 21 is electrically connected to the control terminal of the switch unit 22 for controlling the conduction or disabling of the switch unit 22. The switch unit 22 is respectively connected to the first transmitting coil 41 and the second The input terminal of the transmitting coil 42 is also electrically connected to the output terminals of the first resonance capacitor 501 and the second resonance capacitor 502. Specifically, for convenience of explanation, the amplification unit 21 is divided into a first amplification unit 211, a second amplification unit 212, and a first The three amplifying units 213, and FIGS. 5a, 5b, and 5c, and the control terminal of the first amplifying unit 211 is connected to the PWM signal terminal of the control unit 1, that is, pins 7 and 8 in the first amplifying unit 211 are respectively connected to the figure. The pins 11 and 12 of the control unit in 4 are connected, and the corresponding pins of the control terminals of the second amplification unit 212 and the third amplification unit 213 are connected to the PWM signal terminal of the control unit 1, which is not repeated here, so as to implement the control unit 1. For the convenience of explanation, the switching unit 22 can be regarded as the first switching unit 221, the second switching unit 222, and the third switching unit 223, corresponding to FIGS. 6a, 6b, and 6c. Among them, the first switching unit The input terminal of 221 is electrically connected to the input terminal of the first resonant capacitor 501, that is, connected through the VODB port, and the output terminal of the second switching unit 222 is electrically connected to the second terminal of the first transmitting coil 41 and then grounded, that is, electrically connected through the VODBA port. Connected, the input terminal of the third switching unit 223 is electrically connected to the input terminal of the second resonance capacitor 502, that is, connected through a VODC port, the output terminal of the second switch 222 is electrically connected to the second terminal of the second transmitting coil 42 and grounded, That is, it is connected through the VODA port, so that the first switch unit 221 and the second switch unit 222 control the input amount of the electromagnetic energy of the first transmitting coil 41, and the second switch unit 222 and the third switch unit 223 control the electromagnetic of the second transmitting coil 42 The input size is acceptable, and the first switch unit 221, the second switch unit 222, and the third switch unit 223 are each provided with a first mosfet tube and a second mosfet tube, where the first mosfet tube There may be multiple fet tubes and second mosfet tubes. In this embodiment, as shown in FIGS. 4a, 4b, and 4c, there are two first mosfet tubes and second mosfet tubes for each switching unit. Characteristics, controlling the voltage across the first transmitting coil 41, the second transmitting coil 42, the first resonant capacitor 501, and the second resonant capacitor 502 to achieve conduction or disabling thereof, so that when the control unit 1 according to the first reflective coil 41 and second launch line After the feedback signal of the circle 42 is judged, the corresponding first transmitting coil 41 and the second transmitting coil 42 can be controlled to be continuously turned on or disabled, so that the transmitting coil 4 with the largest area aligned with the receiving coil of the mobile phone can charge the mobile phone. The other transmitting coil 4 is disabled, so that accurate charging is achieved, and mutual interference between the coils is not caused.

[0049] In this embodiment, referring to FIG. 2 and FIG. 7, the output feedback unit 3 includes an output terminal and an input terminal. The VB ACK terminal formed by the transmitting coil 4 and the resonance capacitor 5 is electrically connected to the input terminal of the output feedback unit 3. The output terminal of the output feedback unit 3 is electrically connected to the CODE1 terminal of the control unit 1. Specifically, FIG. 7 is a specific circuit diagram of the output feedback unit. The first transmitting coil 41 and the V-BACK1 terminal of the first resonance capacitor 501, the first The VB ACK2 terminals of the two transmitting coils 42 and the second resonant capacitor 502 are respectively connected to the input terminals of the output feedback unit 3, and the output terminals of the output feedback unit 3 are connected to the CODE1 terminal of the control unit 1. When the first transmitting coil 41 and the second When the transmitting coil 42 senses the receiving coil of the external mobile phone and receives the feedback signal output by the mobile phone, because the feedback signal is relatively weak, if it is directly transmitted to the control unit 1, the control unit 1 will have a harder time identifying it, and After the feedback signal is amplified by the output feedback unit 3, the feedback signal is transmitted to the control unit 1, so that the control unit 1 can easily recognize it, and when When the ray circle 4 continuously outputs electromagnetic energy to charge the mobile phone, the output feedback unit 3 detects in real time whether the voltage across the transmitting coil 4 is stable, and promptly informs the control unit 1 to adjust to avoid excessive voltage or low voltage; The first end of the unit 10 and the voltage stabilizing unit 10 is electrically connected to the amplifying unit 21 and the switching unit 22, and the input of the voltage stabilizing unit 10 is connected to the control unit 1 for maintaining a stable voltage; and further includes a power supply unit 6, a power supply The unit 6 is connected to the control unit 1, the driving unit 2, the resonance capacitor 5, and the output feedback unit 3, and is used for power supply. The unit 6 further includes a power filtering unit. The input terminal of the power filtering unit 7 is electrically connected to the input terminal of the control unit 1. To ensure stable power supply; also includes a power supply adaptation unit 8, which is electrically connected to the EN1 and EN2 ports of the control unit 1, and is used to determine when the external mobile device meets the fast charge standard, and through voltage control, to select whether It performs fast charging or ordinary charging.

Industrial applicability

[0050] The wireless charging circuit using two transmitting coils as a group, and communication between multiple sets of dual transmitting coil circuits, can enable a mobile phone to be charged, and realize accurate matching between the transmitting coil and the receiving coil corresponding to an electronic product such as a mobile phone. Standard, improve wireless charging efficiency, and can charge multiple mobile phones at the same time.

Sequence Listing Free Content [0051] The above disclosure is only one or several specific embodiments of the present utility model, but the present utility model is not limited thereto, and any change that can be thought by those skilled in the art should fall into the protection scope of the present utility model.

Claims

Claim

[Claim 1] A coil module charging circuit, comprising a control unit, a driving unit, a resonance capacitor, an output feedback unit, and a coil module. The coil module includes a pair of transmitting coils superimposed on each other. The transmitting coil is electrically connected to the driving unit, the resonance capacitor and the control unit, the driving unit is electrically connected to the control unit, and the output feedback unit is electrically connected to the transmitting coil, the resonance capacitor and the control unit. The control unit controls the driving unit, the resonance capacitor, and the input feedback unit to periodically send an electromagnetic field signal to each of the transmitting coils;

When the transmitting coil senses the feedback signal sent by the receiving line coil of the external mobile phone, the feedback signal is transmitted to the control unit through the output feedback unit, and the control unit identifies the transmission having the largest contact area with the receiving coil according to the feedback signal The coil, and controls the electromagnetic energy of the driving circuit to continuously send, thereby charging the mobile device, and disabling the other transmitting coil by the driving unit.

[Claim 2] The coil module charging circuit according to claim 1, wherein the output feedback unit includes an output terminal and an input terminal, and a V-BACK terminal formed by the transmitting coil and a resonance capacitor and the output feedback The input terminal of the unit is electrically connected, and the output terminal of the output feedback unit is electrically connected to the CODE 1 terminal of the control unit.

[Claim 3] The coil module charging circuit according to claim 1, wherein the transmitting coils are first and second transmitting coils, and the resonance capacitor includes first and second resonance capacitors, and The first end of the first transmitting coil is electrically connected to the first end of the first resonant capacitor, the first end of the second transmitting coil is electrically connected to the first end of the second resonant capacitor, and the input of the driving unit The terminals are electrically connected to the first and second resonance capacitors, respectively, and the output terminals of the driving unit are electrically connected to the first and second transmitting coils, respectively, and then grounded.

[Claim 4] The coil module charging circuit according to claim 3, wherein the driving unit includes an amplification unit and a switching unit, and a control terminal of the amplification unit is connected to a PWM signal terminal of the control unit. Configured to amplify the voltage from the PWM of the control unit, the output end of the amplification unit is electrically connected to the control end of the switching unit, and is used to control the conduction or disabling of the switching unit, and the switching units are respectively connected to The first, the output of the transmitting coil The input terminal is also electrically connected to the output terminals of the first and second resonance capacitors.

[Claim 5] The coil module charging circuit according to claim 3, wherein the switch unit is provided with a first mosfet tube and a second mosfet tube, and the first mosfet-end is connected to an input power source, and One end is connected to the input ends of the first and second coils, and one end of the second mosfet tube is connected to the first or second coil and grounded.

[Claim 6] The coil module charging circuit according to claim 1, further comprising a power supply unit, wherein the power supply unit is connected to the control unit, the drive unit, the resonance capacitor, and the output feedback unit, and于 power supply.

[Claim 7] The coil module charging circuit according to claim 1, further comprising a power supply filtering unit, wherein an input end of the power supply filtering unit is electrically connected to an input end of the control unit, and is configured to: Ensure stable power supply.

[Claim 8] The coil module charging circuit according to claim 1, further comprising a power supply adaptation unit, wherein the power supply adaptation unit is electrically connected to the EN1 and EN2 ports of the control unit, and is configured to: Determine whether the external mobile device meets the fast charge standard, and choose whether to charge it fast or normally.

[Claim 9] A two-group coil module charging circuit, comprising the coil module charging circuit according to claims 1 to 8, characterized in that the transmitting coils of each group of coil module charging circuits are superimposed on each other, and each group The control units of the coil module charging circuit communicate with each other. When an external receiving coil is felt, each control unit receives a feedback signal of a corresponding transmitting coil, and the control units communicate with each other, and judges with the receiving coil according to the signal. The transmitting coil with the largest contact area controls the current of the transmitting coil to be continuously turned on to further charge the mobile device. When there are two receiving coils, the control unit of the wireless charging circuit of each group of dual transmitting coils controls the two that are not in contact with each other. The current of the transmitting coil is continuously conducted, and the two mobile devices are charged separately.

[Claim 10] A wireless charger includes at least one set of two sets of coil wire charging circuits according to claim 9, further comprising a housing, wherein the housing is provided with a cavity and an upper surface. A placement area is provided, the two sets of coil module charging circuits are placed in the housing, and the hair The ray circle is disposed in a side opposite to the placement area, and the housing is provided with an electrical connection port, and the electrical connection port is electrically connected to the control unit through a wire.