CN102684320B - A kind of wireless power supply - Google Patents

Abstract

The present invention provides a wireless power supply device, which can charge various portable mobile terminal devices placed on the wireless charging transmitting device in real time by means of wireless charging, so that the devices can be continuously charged during use, eliminating the need for It saves the trouble of replacing batteries and charging separately, and brings convenience to users.

Description

A wireless power supply device

【Technical field】

The invention relates to the field of wireless charging, in particular to the application of wireless charging technology based on the principle of electromagnetic induction. the

【Background technique】

At present, wireless charging devices based on the principle of electromagnetic induction are mainly composed of two parts: a power transmitter and an inductive receiver. When the receiving coil of the inductive receiver is placed in the magnetic field of the transmitting coil of the power transmitter, an induced voltage will be generated. After rectification, filtering and voltage stabilization, it can be used to wirelessly charge the load equipment. The power transmitter is mainly composed of a power module and a wireless energy transmission control circuit board. The control circuit in the wireless energy transmission control circuit board is composed of an LC resonance The transmitting circuit is composed of a dedicated IC for power transmission in series, and the induction receiver is composed of an LC receiving circuit, a voltage-controlled pulse width oscillator, a light-controlled voltage regulator and an output power supply circuit, so as to transmit electric energy through electromagnetic induction. In some wireless charging devices based on the principle of electromagnetic induction, during the charging process, the load device needs to be aligned with the charging end more accurately to complete the charging effectively, which has the disadvantage of being inconvenient to use.

【Content of invention】

The technical problem to be solved by the present invention is to provide a wireless charging device that is easy to use and can charge multiple devices at the same time.

The technical solution adopted by the present invention to achieve the purpose of the invention is a wireless power supply device, the wireless power supply device includes a wireless charging transmitter and a wireless charging receiver, the wireless charging transmitter includes a flat device shell, and is arranged in the device shell A power supply module, a control circuit board that generates and controls wireless energy transmission, and a transmitting coil electrically connected to the control circuit board, the wireless charging receiving device is arranged in the load device, and the wireless charging receiving module includes a receiving coil and A receiving circuit board, the receiving coil is electrically connected to the receiving circuit board, and the current output terminal of the receiving circuit board is connected to the power supply of the load device to provide electric energy.

Specifically, the load device is a portable mobile terminal device.

Preferably, both the transmitting coil and the receiving coil are circular planar spiral coils.

Preferably, a magnetic core is provided at the spiral winding center of the annular planar spiral coil.

Preferably, the magnetic core is disc-shaped.

Preferably, the planar spiral coil is an enameled wire coil.

Preferably, the wireless power supply device includes multiple control circuit boards and multiple transmitting coils, and the multiple control circuit boards and multiple transmitting coils are paired one by one and fixed in an array in the housing of the device.

Preferably, the plurality of control circuit boards and the plurality of transmitting coils are fixed on a support plate, and the support plate is fixed in the housing of the device.

Specifically, the receiving circuit board includes a rectifying circuit, a filtering circuit and a voltage stabilizing circuit.

Specifically, the device casing is composed of a casing, an upper cover and a lower cover.

By using the wireless power supply device of the present invention, various portable mobile terminal devices can be arbitrarily placed on the wireless charging transmitting device, wireless charging is realized during use, and the battery life of the terminal device is extended, which has the advantage of being convenient to use.

【Description of drawings】

Fig. 1 is a schematic diagram of the overall structure of a wireless power supply device.

Figure 2, an exploded view of the structure of the wireless charging transmitter.

Fig. 3, the circuit connection block diagram of the wireless charging receiving device.

Fig. 4, the structural diagram of the annular planar spiral coil.

【Detailed ways】

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

A kind of notebook wireless power supply device, its overall structure schematic diagram is referred to accompanying drawing 1, comprises notebook 1, wireless charging transmitting device 2, the device case 3 of wireless charging transmitting device 2 and wireless charging receiving device 4, and wireless charging receiving device 4 is arranged on the notebook 1, the device casing 4 of the wireless charging transmitting device 2 is flat, and can be placed arbitrarily on a workbench or a conference table.

Refer to accompanying drawing 2 for an exploded view of the wireless charging transmitting device 2, which includes a device housing 3 composed of a housing 31, an upper cover 32 and a lower cover 33, a support plate 5, a power module (not shown in the figure) and multiple arrays The charging module, the support plate 5 is provided with a plurality of round holes, and the charging modules of multiple arrays are fixed in the plurality of round holes on the support plate 5, and each charging module includes a control circuit board 6 that generates and controls wireless energy transmission , and the transmitting coil 7 electrically connected to the control circuit board 6 .

Refer to accompanying drawing 3 for the circuit connection block diagram of the wireless charging receiving device 4, which includes a receiving coil 8, a receiving circuit board 9 and a rechargeable battery 10, the receiving coil 8 is electrically connected to the receiving circuit board 9, and the current output terminal of the receiving circuit board 9 is connected to a rechargeable battery. The charging terminal of the battery 10.

In this embodiment, the control circuit on the control circuit board 6 includes an LC resonant transmitting circuit connected in series with a special IC for power transmitting, which is used to transmit the alternating magnetic field through the transmitting coil 7, and finally the receiving device installed in the wireless charging receiving device 4 The coil 8 is used to accumulate and receive electric energy, and the receiving coil 8 sorts, filters and stabilizes the received electric energy through the rectifying circuit, filter circuit and voltage stabilizing circuit of the receiving circuit board, and then outputs it to the rechargeable battery 10 for charging.

In this embodiment, both the transmitting coil 7 and the receiving coil 8 are circular plane spiral coils, and the spiral coils can be enameled wires. In order to enhance the magnetic field generated by the circular plane spiral coils, the circular plane spiral A magnetic core 11 is provided at the center of the spiral winding of the coil, and the magnetic core 11 can be designed as a disc shape to match the shape of the annular planar spiral coil. For the structure diagram of the annular planar spiral coil, refer to accompanying drawing 4.

It should be understood that the load device in this embodiment may also include, but is not limited to: portable mobile terminal devices such as mobile phones, MP3/4, digital cameras, and PDAs.

By using the wireless power supply device of the present invention, various portable mobile terminal devices placed on the wireless charging transmitting device can be charged in real time by means of wireless charging, so that the devices can be continuously charged during use, eliminating the need for The trouble of replacing batteries and charging separately brings convenience to users.

In the above embodiments, the present invention is only described as an example, but those skilled in the art can make various modifications to the present invention without departing from the spirit and scope of the present invention after reading this patent application.

Claims (9)

1. a wireless power supply, it is characterized in that: described wireless power supply comprises wireless charging emitter and wireless charging receiver, described wireless charging emitter comprises flat device shell, be arranged on the power module in crust of the device, produce and control the control circuit board of wireless energy transmission, and the transmitting coil to be electrically connected with described control circuit board, described control circuit board and transmitting coil are provided with multiple, described multiple control circuit board and multiple transmitting coil match one by one arrange and array be fixed in described crust of the device, described crust of the device is tabular, described wireless charging receiver is arranged in load equipment, described wireless charging receiver module comprises receiving coil and circuit board for receiving, described receiving coil is electrically connected described circuit board for receiving, the current output terminal of described circuit board for receiving connects the power supply of load equipment to provide electric energy, described wireless charging emitter comprises supporting bracket and multiple charging module, described supporting bracket is provided with multiple circular hole, described charging module is fixed in the multiple circular holes in described supporting bracket, and described charging module comprises described control circuit board and described transmitting coil.

2. wireless power supply according to claim 1, is characterized in that: described load equipment is portable mobile terminal equipment.

3. wireless power supply according to claim 1, is characterized in that: described transmitting coil and described receiving coil are annular plane spiral shell coiling.

4. wireless power supply according to claim 3, is characterized in that: the Luo Rao center of described annular plane spiral shell coiling is provided with magnetic core.

5. wireless power supply according to claim 4, is characterized in that: described magnetic core is disc.

6. wireless power supply according to claim 2, is characterized in that: described plane spiral shell coiling is enamel wire coil.

7. wireless power supply according to claim 1, is characterized in that: described multiple control circuit board and multiple transmitting coil are fixed in a supporting bracket, and described supporting bracket is fixed in described crust of the device.

8. wireless power supply according to claim 1, is characterized in that: described circuit board for receiving comprises rectification circuit, filter circuit and voltage stabilizing circuit.

9. wireless power supply according to claim 1, is characterized in that: described crust of the device is made up of housing, upper cover and lower cover.