CN102035220A - Wireless power supply device - Google Patents

Abstract

The invention discloses a wireless power supply device, which comprises a power supply connection unit used to connect with a fixed power supply; a branching unit connected with the power supply connection unit, which divides the current of the power supply into multiple parallel branches; at least one parallel branch is provided with The frequency adjustment unit and the main coil unit are connected to each other, and at least one parallel branch is provided with a connected electrical transformer unit and a charging interface; the frequency adjustment unit converts the received current into an alternating current of a specific frequency and sends it to the induction The coil unit, the alternating current of a specific frequency in the induction coil unit generates a magnetic field that changes at a specific frequency; the electrical transformer unit converts the received current into the DC power required by the electrical device, and transmits the converted DC power through the charging interface To electrical equipment. The invention can improve the charging efficiency of the electric device, and use a fixed power socket to charge multiple electric devices at the same time, thereby improving the use efficiency of the socket and making it convenient for users to use.

Description

A wireless power supply device

technical field

The invention relates to a power supply device, in particular to a wireless power supply device.

Background technique

In modern life, there are more and more types of electronic devices, and the charging interfaces of the electronic devices are different. Therefore, different chargers need to be equipped for various electronic devices. In this way, when the user needs to charge, he needs to select a suitable charger for different brands and models of electronic devices. Once a charger with a suitable interface is not found, the electronic device cannot be charged. At the same time, users need to buy chargers with multiple types of interfaces, which will cost a lot of money. They also need to be re-matched and selected from many chargers when using them, and the charging process of chargers and electronic devices needs to be plugged and unplugged many times. Cause damage to the interface of the electronic device, and further cause scrapping of the electronic device.

Moreover, the quantity of fixed power sockets is limited, and when an electric device is charged, its corresponding charger occupies one power socket.

Therefore, there are defects in the prior art and need to be further improved and developed.

Contents of the invention

The purpose of the present invention is to provide a wireless power supply device, so that the power supply device can charge the electric device with direct current through the interface that matches the electric device while charging the electric device wirelessly. way to charge the electric device at the same time.

Technical scheme of the present invention is as follows:

A wireless power supply device, including a power supply connection unit used to connect to a fixed power supply; wherein, it also includes a branching unit connected to the power supply connection unit, and the branching unit is used to divide the current of the power supply into multiple branches connected in parallel At least one parallel branch is provided with a frequency adjustment unit and a main coil unit connected to each other, and at least one parallel branch is provided with a connected electrical transformer unit and a charging interface;

The frequency adjustment unit is connected to the shunt unit, the frequency adjustment unit converts the received current into an alternating current of a specific frequency, and sends it to the induction coil unit, and the alternating current of a specific frequency in the induction coil unit A varying current produces a magnetic field that varies at a specific frequency;

The electrical transformer unit is connected to the current splitting unit, converts the received current into the DC power required by the electrical device, and transmits the converted DC power to the electrical device through the charging interface.

Compared with the prior art, the present invention provides a wireless power supply device. An induction coil unit capable of generating an alternating magnetic field and a charging interface for DC charging are arranged on the wireless power supply device, so that the wireless power supply device can use wireless charging and wired DC charging. Two ways of charging are used to charge the electric device, which improves the charging efficiency of the electric device. At the same time, the power supply device can charge multiple wireless electric devices at the same time, which saves the use of fixed power sockets and facilitates the use of users.

Description of drawings

Fig. 1 is a structural block diagram of the wireless power supply device of the present invention;

Fig. 2 is a schematic structural diagram of a charging interface provided on the wireless power supply device of the present invention;

Fig. 3 is a structural schematic diagram of the arc-shaped bending wall of the carrying charging interface of the present invention;

Fig. 4 is a schematic structural diagram of a charging interface provided in a groove on the surface of the wireless power supply device of the present invention;

FIG. 5 is a schematic structural diagram of a wireless power supply device provided with multiple induction coils in the present invention;

Fig. 6 is a structural block diagram of a one-way conduction circuit provided on the electrical device of the present invention.

Detailed ways

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

The wireless power supply device 100 provided by the present invention, as shown in FIG. 1 , includes a power supply connection unit 110 for connecting to a fixed power supply; The current is divided into a plurality of parallel branches; at least one parallel branch is provided with a frequency adjustment unit 130 and a main coil unit 140 connected to each other, and at least one parallel branch is provided with an interconnected electrical transformer unit 150 and a charging interface 160; The frequency adjustment unit 130 is connected to the shunt unit 120, the frequency adjustment unit 130 converts the received current into an alternating current of a specific frequency, and sends it to the induction coil unit 140, and the induction coil unit 140 The alternating current of a specific frequency generates a magnetic field that changes at a specific frequency; the electrical transformer unit 150 is connected to the shunt unit 120 to convert the received current into the DC power required by the electrical device, and convert the converted The DC power is delivered to the electric device through the charging interface 160 .

The electrical device is provided with a secondary induction coil unit and a charging port connected to the power supply line or the rechargeable battery. The secondary induction coil unit generates an alternating induction current in an alternating magnetic field, and sends the alternating induction current to the The power supply line of the electric device or the rechargeable battery; after the charging port and the charging interface of the charger are connected in hardware, the power supply line of the electric device or the rechargeable battery receives the DC power sent by the charger through the charging port.

The wireless power supply device 100 may have multiple DC charging branches, and there may also be multiple wireless charging branches. In the present invention, the wireless power supply device 100 is provided with one DC charging branch and one wireless charging branch as an example. The structure of the wireless power supply device 100 is described in detail.

The wireless power supply device 100 of the present invention sets two parallel branches through the shunt unit 120, one parallel branch can supply power to the electric device in the form of electromagnetic induction, and one parallel branch passes through the transformer unit and the charging interface, and is matched with the interface way to supply power to electrical devices.

The wireless power supply device 100 includes a housing 170, and the surface of the housing 170 where the electrical device is placed is provided with a protruding side wall 171, and the side wall 171 can be a rectangular flat plate perpendicular to the surface of the housing 170 where the electrical device is placed, as shown in Figure 2 shown; the side wall 171 can also be an arc-shaped bent wall, as shown in FIG. 3 . A charging interface 160 is provided on the side wall 171, and the charging interface 160 can be a MINI USB interface or a cylindrical pin-type power interface, and the interface specification is not limited. The charging interface 160 can be fixedly connected to the side wall 171 , or can be fixedly connected to the side wall in a plug-in type, so that the charging interface 160 of the same voltage can be replaced according to different interfaces.

In the present invention, according to the different DC charging methods of the electric device, a groove 172 for placing the electric device can be provided on the surface of the casing 170, and a power terminal 173 serving as the charging interface 160 can be provided on the inner wall of the groove 172. As shown in Figure 4.

The induction coil unit 140 of the wireless power supply device 100 of the present invention includes an induction coil 141, and the induction coil 141 can be wound around a magnetic core to improve the efficiency of electromagnetic induction. The induction coil unit 140 may also include a plurality of series or parallel induction coils 141 and a coil control module, as shown in FIG. 5 .

The multiple induction coils 141 cover the surface of the housing 170 where the electrical device is placed, that is, the multiple induction coils 141 are parallel to the cross-section of the surface of the housing 170 where the electrical device is placed, and are tiled on the surface of the housing 170. Place the electrical appliance parallel to the surface. The surface of the casing 170 on which the electric device is placed is relatively large, and the electric device may not necessarily occupy the entire surface of the casing 170 on which the electric device is placed. In order to save energy, the induction sub-module of the coil control module senses the position and area of the surface of the housing 170 where the electric device is placed in real time, and judges the induction coil 141 opposite to the electric device, and the induction coil that the electric device deviates from 141. The execution sub-module of the coil control module energizes the induction coil 141 opposite to the power consumption device according to the judgment result of the induction sub-module, and powers off the induction coil 141 deviated from the power consumption device.

When the present invention uses wireless and wired methods to charge the rechargeable battery of the electric device, it is necessary to set a protection circuit for the wired charging circuit and the wireless charging circuit on the rechargeable battery, as shown in FIG. 6 . The induction coil on the electric device generates alternating current, which is converted into direct current after rectification and filtering to charge the rechargeable battery of the electric device. In the present invention, a unidirectional conduction circuit is provided on the wireless charging circuit of the electric device, and the induction coil of the electric device can only charge the rechargeable battery in one direction, so as to prevent the problem of reverse charging of the rechargeable battery to the wireless charging circuit. At the same time, the electric device is also provided with a one-way conduction circuit on the DC charging circuit. The DC charging circuit can charge the rechargeable battery, but the rechargeable battery cannot reversely charge the DC charging circuit. The unidirectional conduction circuit may be a diode, which is not limited here.

The wireless power supply device provided by the present invention includes an induction coil unit for wireless charging, and a charging interface for charging the electric device with direct current. charging efficiency; the present invention can also include a plurality of induction coils that selectively work according to the placement position of the electric device on the power supply device, which reduces the power consumption of the wireless power supply device; the surface of the wireless power supply device shell of the present invention can be placed A fixed power socket is used to charge multiple electric devices at the same time, which improves the use efficiency of the socket and facilitates the use of users.

It should be understood that the above descriptions of the preferred embodiments of the present invention are relatively detailed, and should not be considered as limiting the scope of the patent protection of the present invention. The scope of protection of the patent protection of the present invention should be based on the appended claims.

Claims (10)

1. A wireless power supply device, comprising a power supply connection unit for connecting with a fixed power supply; it is characterized in that it also includes a shunt unit connected with the power supply connection unit, and the shunt unit is used to divide the current of the power supply into parallel Multiple branches; at least one parallel branch is provided with a frequency adjustment unit and a main coil unit connected to each other, and at least one parallel branch is provided with a connected electrical transformer unit and a charging interface; The frequency adjustment unit is connected to the shunt unit, the frequency adjustment unit converts the received current into an alternating current of a specific frequency, and sends it to the induction coil unit, and the alternating current of a specific frequency in the induction coil unit A varying current produces a magnetic field that varies at a specific frequency; The electrical transformer unit is connected to the current splitting unit, converts the received current into the DC power required by the electrical device, and transmits the converted DC power to the electrical device through the charging interface. 2 . The wireless power supply device according to claim 1 , wherein the wireless power supply device further comprises a housing, and a protruding side wall is provided on the surface of the housing where the electric device is placed, and a charging interface is provided on the side wall. 3 . 3 . The wireless power supply device according to claim 2 , wherein the side wall comprises a rectangular flat plate perpendicular to the surface of the casing on which the electric device is placed. 4 . 4 . The wireless power supply device according to claim 3 , wherein the charging interface and the side wall are connected by plugging. 5. The wireless power supply device according to claim 2, wherein the side wall comprises an arc-shaped bent wall. 6. The wireless power supply device according to claim 1, wherein the charging interface includes a MINI USB interface and a cylindrical pin type power interface. 7. The wireless power supply device according to claim 1, characterized in that, the wireless power supply device also includes a casing, the surface of the casing is provided with a groove for placing the electric device, and the inner wall of the groove is provided as a charging device. The power terminal of the interface. 8. The wireless power supply device according to claim 1, wherein the induction coil unit comprises an induction coil wound around a magnetic core. 9. Any wireless power supply device according to claim 2 or 7, characterized in that, the induction coil unit includes a plurality of parallel or series induction coils and a coil control module; the plurality of induction coils are covered with the The shell is placed on the surface of the electric device; the coil control module controls the power-on of the induction coil opposite to the electric device, and controls the power-off of the induction coil deviated from the electric device. 10. The wireless power supply device according to claim 9, wherein the coil control module includes an induction sub-module and an execution sub-module; The induction sub-module senses in real time the position and area of the electric device placed on the surface of the housing, and judges the induction coil opposite to the electric device and the induction coil deviated from the electric device; According to the judgment result of the induction sub-module, the execution sub-module energizes the induction coil opposite to the electrical device, and de-energizes the induction coil that deviates from the electrical device.

Images