CN214314740U - Magnetic resonance type one-to-many wireless charging device - Google Patents

Abstract

The utility model discloses a magnetic resonance one-to-many wireless charging device, which comprises a transmitting host and a plurality of conversion plates coupled with the transmitting host; and a receiving coil, a receiving resonance module, a rectifying and filtering module, a DC-DC conversion module and a QI transmitting module which are electrically connected with the receiving coil in sequence are also arranged in each conversion board. The utility model discloses be equipped with transmission host computer and a plurality of change-over panel, the transmission host computer can be to a plurality of change-over panel transmission electric energy through magnetic resonance's mode, and each change-over panel accessible QI emission module charges to the electronic equipment who supports the wireless agreement that charges of QI again, can realize carrying out the function that wireless charges to a plurality of electronic equipment through a transmission host computer, and the convenience of charging, simultaneously, the device reasonable in design, be convenient for install the maintenance, the practicality is strong.

Description

Magnetic resonance type one-to-many wireless charging device

Technical Field

The utility model relates to a wireless charging technology field especially relates to a magnetic resonance formula one-to-many wireless charging device.

Background

With the progress of science and technology, more and more mobile phones support the mode of wireless charging, compare general cell-phone line charging, wireless charging has avoided the wiring for the user, charge head mismatch and so on inconvenient place. However, the current wireless charging mode still has many limitations, for example, one wireless charging mode can only be used for one mobile phone at a time, one mobile phone occupies one alternating current socket for charging, when a plurality of mobile phones are charged simultaneously, the number of plug wires is too many, the socket is not enough at all, and the use is very inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a magnetic resonance formula wireless charging device of one-to-many, the device is equipped with transmission host computer and a plurality of change-over panel, the transmission host computer can be to a plurality of change-over panel transmission electric energy through magnetic resonance's mode, and each change-over panel is accessible QI emission module again and charges to the electronic equipment who supports the wireless agreement that charges of QI, can realize carrying out the function that wirelessly charges to a plurality of electronic equipment through a transmission host computer, it is convenient to charge, and simultaneously, the device reasonable in design, be convenient for install and maintain, therefore, the clothes hanger is strong in practicability.

In order to realize the purpose, the following technical scheme is adopted:

a magnetic resonance type one-to-many wireless charging device comprises a transmitting host and a plurality of conversion plates coupled with the transmitting host; a receiving coil, a receiving resonance module, a rectifying and filtering module, a DC-DC conversion module and a QI transmitting module which are electrically connected with the receiving coil in sequence are also arranged in each conversion board; the receiving coil is used for receiving the wireless power signal transmitted by the transmitting host and generating resonant voltage through the receiving resonant module; the rectification filtering module is used for rectifying and filtering the resonance voltage, converting the resonance voltage into direct-current voltage through the DC-DC conversion module so as to supply power to the QI transmitting module, and the QI transmitting module is used for charging electronic equipment which is placed on the conversion board and supports the QI wireless charging protocol.

Furthermore, the transmitting host comprises a main control MCU, an EMC filtering module, a PFC boosting module, a half-bridge module, a transmitting resonance module and a transmitting coil, wherein the EMC filtering module, the PFC boosting module, the half-bridge module, the transmitting resonance module and the transmitting coil are electrically connected with the mains supply in sequence; the main control MCU is electrically connected with the half-bridge module, and an auxiliary power supply module is connected between the main control MCU and the PFC boosting module.

Furthermore, a voltage and current sampling module is connected between the master control MCU and the transmission resonance module, and a driving circuit module is connected between the master control MCU and the half-bridge module.

Furthermore, the transmitting host machine further comprises a heat dissipation module and a warning module which are respectively electrically connected with the main control MCU.

Further, the magnetic resonance one-to-many wireless charging device further comprises a table body; the launching host is arranged below the desktop of the desk body, and the plurality of conversion plates are arranged on the desktop of the desk body.

Adopt above-mentioned scheme, the beneficial effects of the utility model are that:

the device is equipped with transmission host computer and a plurality of change-over panel, and the transmission host computer can be to a plurality of change-over panel transmission electric energy through magnetic resonance's mode, and each change-over panel accessible QI emission module charges to the electronic equipment who supports the wireless agreement that charges of QI again, can realize carrying out the function that wireless charges to a plurality of electronic equipment through a transmission host computer, and it is convenient to charge, and simultaneously, the device reasonable in design, be convenient for installation maintenance, the practicality is strong.

Drawings

FIG. 1 is a diagram of a specific application of one embodiment of the present invention;

fig. 2 is a schematic block diagram of the launching host of the present invention;

fig. 3 is a schematic block diagram of the conversion plate of the present invention;

fig. 4 is a circuit diagram of the main control MCU of the present invention;

fig. 5 is a circuit diagram of the auxiliary power supply module of the present invention;

fig. 6 is a circuit diagram of the EMC filter module and the PFC boost module of the present invention;

fig. 7 is a circuit diagram of the half-bridge module and the transmission resonant module of the present invention;

fig. 8 is a circuit diagram of the receiving resonance module and the rectifying and filtering module of the present invention;

fig. 9 is a circuit diagram of a DC-DC conversion module according to the present invention;

wherein the figures identify the description:

1-transmitting the host; 2-a conversion plate;

3, a heat dissipation module; 4, a warning module;

5, a table body; 11-main control MCU;

12-EMC filtering module; 13-PFC boost module;

14-half bridge module; 15-a transmission resonance module;

16-an auxiliary power supply module; 17-a voltage current sampling module;

18-a driving circuit module; 21-a receiving resonance module;

22-a rectifying and filtering module; 23-a DC-DC conversion module;

24-QI transmitting module.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 9, the present invention provides a magnetic resonance one-to-many wireless charging device, which includes a transmitting host 1 and a plurality of conversion boards 2 coupled to the transmitting host 1; each conversion board 2 is internally provided with a receiving coil, a receiving resonance module 21, a rectifying and filtering module 22, a DC-DC conversion module 23 and a QI transmitting module 24 which are electrically connected with the receiving coil in sequence; the receiving coil is used for receiving the wireless power signal transmitted by the transmitting host 1 and generating resonance voltage through the receiving resonance module 21; the rectifying and filtering module 22 is configured to rectify and filter the resonant voltage, and convert the rectified and filtered resonant voltage into a direct current voltage through the DC-DC conversion module 23 to supply power to the QI transmitting module 24, where the QI transmitting module 24 is configured to charge an electronic device that is placed on the conversion board 2 and supports a QI wireless charging protocol.

The transmitting host 1 comprises a main control MCU11, an EMC filtering module 12, a PFC boosting module 13, a half-bridge module 14, a transmitting resonance module 15 and a transmitting coil, wherein the EMC filtering module 12, the PFC boosting module 13, the half-bridge module 14, the transmitting resonance module 15 and the transmitting coil are electrically connected with mains supply in sequence; the main control MCU11 is electrically connected to the half-bridge module 14, and an auxiliary power module 16 is connected between the main control MCU11 and the PFC boost module 13; a voltage and current sampling module 17 is connected between the main control MCU11 and the transmitting resonance module 15, and a driving circuit module 18 is connected between the main control MCU11 and the half-bridge module 14; the transmitting host 1 further comprises a heat dissipation module 3 and a warning module 4 which are respectively and electrically connected with the main control MCU 11; the magnetic resonance one-to-many wireless charging device further comprises a table body 5; the launching host machine 1 is arranged below the desktop of the desk body 5, and the plurality of conversion plates 2 are arranged on the desktop of the desk body 5.

The utility model discloses the theory of operation:

with continued reference to fig. 1 to 9, in one embodiment, the device is mounted on the table body 5, and meanwhile, the device may also be mounted on other places needing charging, such as a wall surface, etc., without limitation; in the embodiment, the transmitting host 1 is installed below the table body 5, the plurality of conversion plates 2 can be made into cup mats and arranged on the table top, and when a user uses the wireless charging table, the electronic equipment supporting the QI wireless charging protocol can be charged by being placed on the conversion plates 2, so that the wireless charging table is simple and convenient; specifically, the method comprises the following steps:

the transmitting host 1: the transmitting host 1 can provide electric energy (transmit wireless electric energy signals) to the plurality of conversion boards 2 simultaneously in a magnetic resonance mode, and when the transmitting host works, 220V alternating current is input by commercial power, is subjected to filtering and rectification by the EMC filtering module 12 and is transmitted to the PFC boosting module 13 to be converted into high-voltage direct current voltage (DC 390V); then, the high-voltage dc voltage is converted into a dc square wave through the half-bridge module 14, the dc square wave is converted into an ac sine wave in the LC network of the transmission resonance module 15 and flows through the transmission coil, so as to transmit electric energy to the conversion board 2 (coupled with the receiving coil of the conversion board 2); in addition, an auxiliary power module 16 is connected between the PFC boost module 13 and the main control MCU11, and the auxiliary power module 16 can generate several sets of dc voltages, which are respectively used to drive the main control MCU11, the driving circuit module 18, the heat dissipation module 3, and the warning module 4 to operate.

After the main control MCU11 IS started, the voltage/current sampling module 17 IS controlled to monitor the operating state of the transmitting coil, including the IS value (current, voltage, and alternating magnetic field strength of the transmitting coil, etc. to ensure that the magnetic field of the converter board 2 IS stable and will not be affected by the increase of the number of the charging electronic devices) flowing through the transmitting coil, the detection IS2 of the input total current (which can be used as a signal for outputting the total power and the change of the charging electronic devices), the temperature detection signal Ts (for over-temperature protection) and the unlocking signal (for unlocking hardware protection); if the abnormality exists, the main control MCU11 controls the warning module 4 to send warning information, in this embodiment, the warning module 4 includes an LED indicator and a buzzer, and when the abnormality occurs, the buzzer alarms and the LED indicator flashes to warn in time; if there is no abnormality, the main control MCU11 turns on the heat dissipation module 3 (including the heat dissipation fan), and controls the driving circuit module 18 to turn on, so as to control the half-bridge module 14 to output a square wave; the square wave frequency IS decreased progressively from the initial frequency, each time one unit IS decreased progressively, then one time length IS waited, the IS value IS detected, if the IS value does not reach the target value, one unit IS decreased progressively, one time length IS waited to be detected for a moment, the steps are repeated, and the adjustment IS stopped until the IS value reaches the target value; after the stable working state IS entered, the main control MCU11 can continuously inquire the IS value, the IS2 value, the TS value and the unlocking signal, when the IS value deviates beyond a preset value, the square wave frequency can be automatically adjusted, and other corresponding reactions are made according to the sampling value.

The conversion panel 2: the receiving coil is arranged inside the conversion board 2, and after obtaining energy from the alternating magnetic field, the receiving coil is adjusted to a resonance point (maximizing received energy) through the receiving resonance module 21 to generate resonance voltage, and then the resonance voltage is generated through the rectifying and filtering module 22 to generate preceding-stage voltage, and the preceding-stage voltage has large fluctuation, so that the preceding-stage voltage is converted into stable direct-current voltage through the DC-DC conversion module 23, and then the stable direct-current voltage is supplied to the QI transmitting module 24, and further the electronic equipment which supports the QI wireless charging protocol is charged through the QI transmitting module 24.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. A magnetic resonance type one-to-many wireless charging device is characterized by comprising a transmitting host and a plurality of conversion plates coupled with the transmitting host; a receiving coil, a receiving resonance module, a rectifying and filtering module, a DC-DC conversion module and a QI transmitting module which are electrically connected with the receiving coil in sequence are also arranged in each conversion board; the receiving coil is used for receiving the wireless power signal transmitted by the transmitting host and generating resonant voltage through the receiving resonant module; the rectification filtering module is used for rectifying and filtering the resonance voltage, converting the resonance voltage into direct-current voltage through the DC-DC conversion module so as to supply power to the QI transmitting module, and the QI transmitting module is used for charging electronic equipment which is placed on the conversion board and supports the QI wireless charging protocol.

2. The magnetic resonance type one-to-many wireless charging device according to claim 1, wherein the transmitting host comprises a main control MCU, and an EMC filtering module, a PFC boosting module, a half-bridge module, a transmitting resonance module and a transmitting coil which are electrically connected with a mains supply in sequence; the main control MCU is electrically connected with the half-bridge module, and an auxiliary power supply module is connected between the main control MCU and the PFC boosting module.

3. The magnetic resonance type one-to-many wireless charging device according to claim 2, wherein a voltage and current sampling module is further connected between the main control MCU and the transmission resonant module, and a driving circuit module is further connected between the main control MCU and the half-bridge module.

4. The magnetic resonance type one-to-many wireless charging device according to claim 3, wherein the transmitting host further comprises a heat dissipation module and a warning module electrically connected to the main control MCU respectively.

5. The magnetic resonance one-to-many wireless charging device according to claim 1, further comprising a table; the launching host is arranged below the desktop of the desk body, and the plurality of conversion plates are arranged on the desktop of the desk body.

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