CN212796549U

CN212796549U - Wireless charging device, vehicle and wireless charging system

Info

Publication number: CN212796549U
Application number: CN202021357189.7U
Authority: CN
Inventors: 张辉; 吴壬华; 宋安国
Original assignee: Shenzhen Shinry Technologies Co Ltd
Current assignee: Shenzhen Shinry Technologies Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-26
Anticipated expiration: 2030-07-10

Abstract

The application provides a wireless charging device, a vehicle and a wireless charging system. The wireless charging device comprises a charging main body, wherein the charging main body is provided with a receiving coil, and the receiving coil is used for receiving an electromagnetic signal of the transmitting coil, converting the electromagnetic signal into a current signal and outputting the current signal to a battery of the charging main body; the wireless charging device further comprises a first telescopic assembly, the first telescopic assembly is connected with the receiving coil, and the first telescopic assembly can stretch out and draw back to enable the receiving coil to be close to or far away from the transmitting coil. The application provides a wireless charging device can shorten the distance between transmitting coil and the receiving coil, promotes the transmission efficiency that wireless charges.

Description

Wireless charging device, vehicle and wireless charging system

Technical Field

The application relates to the technical field of wireless charging, in particular to a wireless charging device, a vehicle and a wireless charging system.

Background

The popularization of electric vehicles has led to the development of charging technology for electric vehicles. Among them, the wireless charging technology is widely popular due to the characteristics of safety and convenience, and the wireless charging technology can realize the charging and stopping immediately. However, the charging efficiency of the wireless charging technology is affected by the distance between the transmitting end and the receiving end, and when the transmitting end is far away from the receiving end, the electric energy transmission efficiency is low and the charging speed is slow.

SUMMERY OF THE UTILITY MODEL

The application provides a wireless charging device, a vehicle and a wireless charging system, wherein the distance between a transmitting coil and a receiving coil can be shortened.

In one aspect, an embodiment of the present application provides a wireless charging device, where the wireless charging device includes a charging main body, and the charging main body includes a receiving coil, where the receiving coil is configured to receive an electromagnetic signal from a transmitting coil, convert the electromagnetic signal into a current signal, and output the current signal to a battery of the charging main body; and

the first telescopic assembly is connected with the receiving coil and can be telescopic, so that the receiving coil is close to or far away from the transmitting coil.

The wireless charging device further comprises a first accommodating groove and a protection baffle plate covering an opening of the first accommodating groove, the first telescopic assembly and the receiving coil are arranged in the first accommodating groove, when the charging main body needs to be charged, the protection baffle plate is moved away, and the first telescopic assembly pushes the receiving coil to extend out of the opening of the first accommodating groove and to be close to the transmitting coil.

The wireless charging device further comprises a driving assembly and a control assembly, the control assembly is electrically connected with the driving assembly and the protection baffle, the driving assembly is connected with the first telescopic assembly, the control assembly is used for moving away the protection baffle and controlling the driving assembly to drive the first telescopic assembly to extend when the charging main body needs to be charged, so that the distance between the receiving coil and the transmitting coil is reduced.

The driving assembly is a motor, the first telescopic assembly comprises a first fitting piece and a second fitting piece which are connected with each other, the first fitting piece is connected to an output shaft of the motor, the second fitting piece is connected with the receiving coil, when the output shaft of the motor rotates, the first fitting piece is driven by the output shaft of the motor to rotate, the second fitting piece makes linear motion under the action of the first fitting piece, and the receiving coil is telescopic relative to the transmitting coil under the action of the second fitting piece.

The driving assembly is a motor, the first telescopic assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is sleeved on an output shaft of the motor, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is rotatably connected with the receiving coil, and when the output shaft of the motor rotates, the first connecting rod and the second connecting rod are gradually opened or gradually closed under the action of the motor so as to drive the receiving coil to stretch and retract relative to the transmitting coil.

The first telescopic assembly comprises a magnetic part and an elastic part, the magnetic part and the receiving coil are oppositely arranged and fixed between the receiving coil and the bottom wall of the first accommodating groove, the elastic part is connected between the receiving coil and the bottom wall of the first accommodating groove, magnetic force can be generated between the magnetic part and the receiving coil, and the receiving coil is close to or far away from the transmitting coil under the action of the magnetic force.

The magnetic part is a coil, the magnetic part is electrically connected with the battery of the charging body to receive current introduced by the battery of the charging body, and when the magnetic part is introduced with current, magnetic force is generated between the magnetic part and the receiving coil.

On the other hand, the embodiment of the application also provides a vehicle, and the vehicle comprises the wireless charging device, and the wireless charging device is arranged on the top or the side of the vehicle.

In another aspect, an embodiment of the present application further provides a wireless charging system, where the wireless charging system includes a transmitting coil and the vehicle.

The wireless charging system further comprises a support and a second telescopic assembly, one end of the support is fixed to the ground, the other end of the support is fixed to the transmitting coil and the second telescopic assembly, the second telescopic assembly can stretch, and the telescopic end of the second telescopic assembly is connected with the transmitting coil, so that the transmitting coil is close to or far away from the receiving coil.

According to the wireless charging device provided by the embodiment of the application, the first telescopic assembly is connected with the receiving coil and used for extending out and retracting the receiving coil, when charging is conducted, the first telescopic assembly extends out, the receiving coil connected with the first telescopic assembly extends out, and the distance between the receiving coil and the transmitting coil is reduced, so that the electromagnetic signal between the receiving coil and the transmitting coil is enhanced, and the charging efficiency of the wireless charging device can be improved; after charging, the first telescopic assembly retracts, and the receiving coil connected with the first telescopic assembly retracts to enable the receiving coil to be far away from the transmitting coil, so that the damage to a human body or other objects caused by a magnetic field between the receiving coil and the transmitting coil can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a wireless charging system according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a vehicle according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a wireless charging system according to another embodiment of the present application;

fig. 4 is a partially enlarged schematic view of the wireless charging system shown in fig. 3;

FIG. 5 is a schematic structural diagram of a vehicle according to another embodiment of the present application;

fig. 6 is a schematic structural diagram of an accommodating slot and a protective baffle of a wireless charging device according to an embodiment of the present disclosure;

fig. 7 is a schematic view illustrating a receiving slot structure of a wireless charging device according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram illustrating a receiving slot of a wireless charging device provided with a first telescopic assembly and a receiving coil according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a driving assembly in a wireless charging device according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a driving assembly in a wireless charging device according to another embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a driving assembly in a wireless charging device according to a third embodiment of the present application;

fig. 12 is a schematic structural diagram of a wireless charging system according to a third embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments in the present application may be combined as appropriate.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a wireless charging system 100 according to an embodiment of the present disclosure. The wireless charging system 100 may be a charging system for a vehicle, such as: charging systems for vehicles such as automobiles and electric bicycles, or charging systems for electronic devices, such as: the charging system of equipment such as cell-phone, panel, computer, electric toothbrush, intelligent wearing equipment. The wireless charging system 100 may transmit the wireless signal by using an electromagnetic induction method, an electromagnetic resonance method, an electric field coupling method, or a radio wave method. The embodiments of the present application will be described by taking an electromagnetic induction method as an example.

Referring to fig. 1 and 2, a wireless charging system 100 includes a transmitting coil 2 and a vehicle 1. The transmitting coil 2 may be an air coil, a ferrite coil, an iron core coil, a copper core coil, or the like. The embodiment of the present application will be described taking the wireless charging system 100 of the electric vehicle 20 as an example. The vehicle 1 includes an electric vehicle 20 and a wireless charging device 10 provided on a top portion 201 or a side portion 21 of the electric vehicle 20. Of course, in other embodiments, the wireless charging device 10 may also be disposed at the bottom of the electric vehicle 20. In this embodiment, the length direction of the electric vehicle 20 in the wireless charging system 100 is defined as the Y-axis direction. The width direction of the electric vehicle 20 is defined as the X-axis direction. The height direction of the electric vehicle 20 is defined as the Z-axis direction.

The wireless charging device 10 may be integrally formed with the electric vehicle 20, or may be detachably connected to the electric vehicle 20. In one embodiment, as shown in FIG. 2, the electric vehicle 20 includes a top portion 201, a side portion 21 adjacent to the top portion 201, and a bottom portion 205 opposite the top portion 201. Specifically, the side portion 21 of the electric vehicle 20 includes a head side portion 203, a tail side portion 202, a first door side portion 204 and a second door side portion (not shown) that are opposite. Referring to fig. 1 and 2, the wireless charging device 10 may be detachably connected to the top portion 201 of the electric vehicle 20 or the side portion 21 of the electric vehicle 20, or the wireless charging device 10 may be disposed on both the top portion 201 and the side portion 21 of the electric vehicle 20. Of course, in other embodiments, the wireless charging device 10 may also be disposed at the bottom 205 of the electric vehicle 20. By providing the wireless charging device 10 on the top 201 or the side 21 of the electric vehicle 20, metal parts falling on the wireless charging device 10, interfering with signal transmission of the wireless charging system 100 or causing a fire risk are avoided. In addition, when the wireless charging device 10 is installed on the top portion 201 or the side portion 21 of the electric vehicle 20, an external metal device is not easily dropped on the wireless charging device 10, and foreign matter or living matter detection is not required when the wireless charging device 10 is used, thereby simplifying a wireless charging mode and reducing the cost of wireless charging.

Referring to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of a wireless charging system 100 according to an embodiment of the present disclosure. Fig. 4 is a partially enlarged schematic view of a region a of the wireless charging device 10 shown in fig. 3. The wireless charging device 10 includes a charging body 101 and a first telescopic assembly 102.

As shown in fig. 3, the charging body 101 includes a receiving coil 3 and a battery 4. In the embodiment of the present application, the battery 4 is provided on the electric vehicle 20. Of course, in other embodiments, the battery 4 may be disposed in the wireless charging device 10, and the battery 4 is used to provide power for the electric vehicle 20 by connecting the wireless charging device 10 to the electric vehicle 20. The receiving coil 3 may be a coil assembly or may be a single coil. The receiving coil 3 may be an air coil, a ferrite coil, an iron core coil, or a copper core coil, etc. The receiving coil 3 is used for receiving the electromagnetic signal of the transmitting coil 2, converting the electromagnetic signal into a current signal, and outputting the current signal to the battery 4 of the charging body 101. Of course, in other embodiments, the receiving coil 3 may also be an antenna assembly, wireless charging is performed between the receiving coil 3 and the transmitting coil 2 by transmitting energy waves, and after receiving the energy waves, the receiving coil 3 reduces the energy waves to direct current usable by the charging main body 101 through the resonance circuit and the rectifying circuit, thereby implementing wireless charging.

Referring to fig. 3 and 4, the first telescopic assembly 102 is connected to the receiving coil 3, and the first telescopic assembly 102 can be telescopic to enable the receiving coil 3 to approach or move away from the transmitting coil 2. The first telescoping assembly 102 may be an electric ram or a hydraulic ram, among others. The first telescopic assembly 102 and the receiving coil 3 may be movably or fixedly connected. Wherein, the movable connection mode can be rotation and the like. Wherein, the fixed connection mode can be bolt connection, buckle connection and the like.

Optionally, referring to fig. 3 and fig. 4, the wireless charging device 10 is disposed on a top portion 201 of the electric vehicle 20, and the extending direction of the first extending and contracting assembly 102 is along the Z-axis direction. When the first telescopic assembly 102 extends, the receiving coil 3 extends forwards along the Z axis under the action of the first telescopic assembly 102; when the first retraction assembly 102 is retracted, the receive coil 3 is retracted in the Z-axis direction by the first retraction assembly 102.

Alternatively, as shown in fig. 5, the wireless charging device 10 is disposed on a rear side 202 of the electric vehicle 20, and the extending and retracting direction of the first extending and retracting assembly 102 is along the Y-axis direction. When the first telescopic assembly 102 extends, the receiving coil 3 extends along the Y-axis forward direction under the action of the first telescopic assembly 102; when the first retraction assembly 102 is retracted, the receive coil 3 is retracted in the Y-axis direction by the first retraction assembly 102. In another embodiment, the wireless charging device 10 may also be disposed on the head side portion 203 of the electric vehicle 20, and the first telescopic assembly 102 moves along the Y axis. In another embodiment, the wireless charging device 10 is provided on the first door side 204 (see fig. 2) or the second door side of the electric vehicle 20.

The first telescopic assembly 102 is connected with the receiving coil 3 and used for extending and retracting the receiving coil 3, when charging is needed, the first telescopic assembly 102 extends out, the receiving coil 3 connected with the first telescopic assembly 102 extends out, and the distance between the receiving coil 3 and the transmitting coil 2 is reduced, so that the electromagnetic signal between the receiving coil 3 and the transmitting coil 2 is enhanced, and the charging efficiency of the wireless charging device 10 can be improved; after charging, first flexible subassembly 102 retracts, and the receive coil 3 of connecting first flexible subassembly 102 retracts and makes receive coil 3 keep away from transmitting coil 2 to can avoid the magnetic field between receive coil 3 and the transmitting coil 2 to cause the injury to human body or other objects.

Further, referring to fig. 6 and 7, the charging body 101 further includes a receiving slot 110 and a protection baffle 5 covering an opening 1100 of the receiving slot 110.

Specifically, as shown in fig. 6, the charging body 101 includes a protective shutter 5, a bottom plate 112, and a peripheral side plate 113. Referring to fig. 7, the receiving groove 110 includes a bottom surface 1101 and a peripheral side surface 1102 surrounding the bottom surface 1101. The protective shutter 5 is connected to the circumferential side 1102 of the housing groove 110 and covers the opening 1100 of the housing groove 110. The protective baffle 5 may be a flat plate surrounding the circumferential side 1102 of the receiving groove 110, or may be a louver, a sliding door, or the like connected to the circumferential side 1102 of the receiving groove 110. The protective shutter 5 may be slidably coupled to the circumferential side 1102 of the housing groove 110, or may be rotatably coupled thereto.

Referring to fig. 7 and 8, the first telescopic assembly 102 and the receiving coil 3 are disposed in the accommodating slot 110. Specifically, the first expansion/contraction member 102 may be connected to the bottom 1101 or the circumferential side 1102 of the housing groove 110. The receiving coil 3 may be connected to the bottom 1101 of the receiving cavity 110 or to the telescopic end of the first telescopic assembly 102. The receiving coil 3 faces the opening 1100 of the housing groove 110. The receiving coil 3 may be extended or retracted through the opening 1100 of the receiving slot 110. As can be appreciated, referring to fig. 6 to 8, when the charging body 101 needs to be charged, the protective baffle 5 is moved away, and the first telescopic assembly 102 pushes the receiving coil 3 to extend out through the opening 1100 of the receiving slot 110 and close to the transmitting coil 2. When the charging of the charging body 101 is completed, the first retractable assembly 102 retracts into the receiving coil 3 through the opening 1100 of the receiving slot 110, the receiving coil 3 is far away from the transmitting coil 2 and is located in the receiving slot 110, and the protective baffle 5 covers the opening 1100 of the receiving slot 110.

By arranging the accommodating groove 110 on the charging body 101 for accommodating the first telescopic assembly 102 and the receiving coil 3, when the charging body 101 is in an uncharged state, the receiving coil 3 is accommodated in the accommodating groove 110, so that the influence of weather when the receiving coil 3 is exposed is avoided, and the reliability and the service life of the receiving coil 3 are reduced. In addition, the protective shutter 5 is provided in the opening 1100 of the housing groove 110, and the protective shutter 5 can cover the opening of the housing groove 110 when the charging body 101 is charged, thereby sealing the first expansion element 102 and the receiving coil 3 in the housing groove 110 and further protecting the receiving coil 3 from the external environment.

Further, referring to fig. 7 to 9, the charging main body 101 further includes a driving assembly 120 and a control assembly (not shown), the control assembly is electrically connected to the driving assembly 120 and the protective baffle 5, and the driving assembly 120 is connected to the first telescopic assembly 102 for driving the first telescopic assembly 102 to extend and retract. The control component is used for removing the protective baffle 5 and controlling the driving component 120 to drive the first telescopic component 102 to extend or shorten when the charging body 101 is charged, so that the distance between the receiving coil 3 and the transmitting coil 2 (see fig. 3) is reduced.

In one embodiment, the control assembly includes a detector (not shown) and a controller (not shown). The detector can be a sensor, when the detector detects that the distance between the receiving coil 3 and the transmitting coil 2 is a preset distance, the detector sends a signal for removing the protective baffle 5 and a signal for driving the first telescopic assembly 102 to stretch and contract to the controller, and the controller removes the protective baffle 5 according to the signal for removing the protective baffle 5 and drives the first telescopic assembly 102 to stretch and contract. The controller controls the drive assembly 120 to extend and retract the receive coil 3. Of course, in other embodiments, the control assembly may control the removal of the protective barrier 5 and the extension and retraction of the first telescopic assembly 102 according to the operation of the user.

Through setting up drive assembly 120 and control assembly, drive assembly 120 and guard flap 5 are connected to the control assembly electricity to the flexible of first flexible subassembly 102 and guard flap 5's removal can be controlled through the control assembly, makes the flexible of first flexible subassembly 102 and guard flap 5 move away simple, reliable.

The following embodiments illustrate the structure of the driving assembly 120 and the first telescopic assembly 102, and of course, the structure of the driving assembly 120 and the first telescopic assembly 102 in the embodiments of the present application includes, but is not limited to, the following embodiments.

In one embodiment, as shown in FIG. 9, the driving assembly 120 is a motor. The first telescoping assembly 102 includes a first mating member 121 and a second mating member 122 connected to each other. The first fitting 121 may be a gear, and the second fitting 122 may be a rack; or the first mating member 121 may be a worm gear and the second mating member 122 may be a worm. In other embodiments, the first engaging element 121 may be a ball and the second engaging element 122 may be a screw. The first fitting member 121 is connected to an output shaft of the motor, and the first fitting member 121 and the second fitting member 122 are engaged with each other. The receiving coil 3 is connected to one end of the second mating member 122, when the output shaft of the motor rotates, the first mating member 121 is driven by the output shaft of the motor to rotate, the second mating member 122 makes a linear motion under the action of the first mating member 121, and the receiving coil 3 connected to one end of the second mating member 122 makes a linear motion along with the second mating member 122, so that the receiving coil 3 stretches relative to the transmitting coil 2 under the action of the first stretching assembly 102.

The first mating member 121 is driven by the motor to rotate, the first mating member 121 is meshed with the second mating member 122, and the first mating member 121 drives the second mating member 122 to move linearly when rotating, so that the receiving coil 3 is stretched. In the embodiment, the telescopic process of the receiving coil 3 is stable and the friction resistance is small.

In another embodiment, as shown in FIG. 10, the drive assembly 120 is a motor. The first telescopic assembly 102 comprises a first connecting rod 123 and a second connecting rod 124, one end of the first connecting rod 123 is sleeved on the output shaft of the motor, the other end of the first connecting rod 123 is hinged to one end of the second connecting rod 124, and the other end of the second connecting rod 124 is rotatably connected with the receiving coil 3. When the output shaft of the motor rotates, the first link 123 and the second link 124 rotate, and the second link 124 pushes the receiving coil 3 closer to or farther from the transmitting coil 2 (see fig. 3). The expansion and contraction of the receiving coil 3 are controlled through the link mechanism, so that the cost of the wireless charging device 10 is low, and the expansion and contraction at a longer distance can be realized.

In another embodiment, referring to fig. 11 and 12, the first telescopic assembly 102 includes a magnetic element 125 and an elastic element 126, the magnetic element 125 is disposed opposite to the receiving coil 3 and fixed between the receiving coil 3 and the bottom 1101 of the receiving slot 110, a magnetic force can be generated between the magnetic element 125 and the receiving coil 3, and the receiving coil 3 is close to or far from the transmitting coil 2 under the magnetic force. Alternatively, the magnetic member 125 may be a magnet or a coil, and the magnetic member 125 is fixed on the bottom 1101 of the receiving slot 110. Of course, in other embodiments, the magnetic member 125 may be fixed on the circumferential side 1102 of the receiving groove 110. The elastic member 126 is connected between the receiving coil 3 and the bottom 1101 of the housing groove 110. The elastic member 126 may be a spring, a spring plate, an elastic rubber, or the like. The embodiment of the present application is described by taking a spring as an example, and it can be understood that when a repulsive magnetic force is generated between the magnetic member 125 and the receiving coil 3, the receiving coil 3 approaches the transmitting coil 2 under the repulsive force of the magnetic member 125 and the elastic force of the elastic member 126; when an attractive magnetic force is generated between the magnetic member 125 and the receiving coil 3, the receiving coil 3 is moved away from the transmitting coil 2 by the attractive force of the magnetic member 125 and the elastic restoring force of the elastic member 126.

In the method of setting the magnetic member 125 in the housing groove 110 to stretch and contract the receiving coil 3, the wireless charging device 10 has a simple structure, and has fewer components and less noise during the stretching and contraction of the receiving coil 3. The elastic member 126 also has buffering and guiding functions during the process of stretching and retracting the receiving coil 3.

Further, referring to fig. 11 and 12, the magnetic element 125 is a coil, the magnetic element 125 is electrically connected to the charging body 101 to receive the current applied to the charging body 101, and when the current is applied to the magnetic element 125, the receiving coil 3 is close to or away from the magnetic element 125 under the action of the magnetic element 125. Specifically, the magnetic member 125 is fixed on the bottom 1101 of the accommodating slot 110, when the magnetic member 125 is energized with a current in a first direction, the magnetic member 125 and the receiving coil 3 repel each other, and the receiving coil 3 is away from the magnetic member 125 and gradually approaches the transmitting coil 2 under the action of the repulsive force. When the magnetic element 125 is energized with a current in a second direction, the magnetic element 125 and the receiving coil 3 are attracted to each other, and the receiving coil 3 is close to the magnetic element 125 and gradually moves away from the transmitting coil 2 under the action of the attraction force. Wherein the first flow direction is opposite to the second flow direction. In this embodiment, the magnetic member 125 is provided as a coil, so that the weight of the first telescopic assembly 102 can be reduced, and the wireless charging device 10 is light and easy to detach and replace.

Optionally, referring to fig. 12, the wireless charging system 100 further includes a bracket 104 and a second telescopic assembly 103.

Wherein the support 104 is used to support the transmitting coil 2 and the second telescopic assembly 103. In one embodiment, one end of the bracket 104 is fixed to the ground, and the other end of the bracket 104 extends along the Z-axis of the electric vehicle 20. The support 104 may be a pole fixed to the ground.

The second telescoping assembly 103 is used for telescoping the transmitting coil 2 so that the transmitting coil 2 is close to or far from the receiving coil 3 on the electric vehicle 20. Wherein, the second telescopic assembly 103 can be an electric push rod, a hydraulic push rod, etc. In other embodiments, the second telescopic assembly 103 may also have the same structure as the first telescopic assembly 102 (see fig. 4), and will not be described herein again.

By arranging the transmitting coil 2 on the support 104 so that the transmitting coil 2 is far from the ground, it is possible to avoid foreign matter from falling off the transmitting coil 2. Secondly, the transmitting coil 2 is extended and contracted through the second extension assembly 103, so that the transmitting coil 2 is close to or far away from the receiving coil 3, when charging is carried out, the second extension assembly 103 extends out, the transmitting coil 2 is close to the receiving coil 3, electromagnetic signals between the receiving coil 3 and the transmitting coil 2 are enhanced, and the charging efficiency of the wireless charging device 10 is improved; after charging, the second telescopic assembly 103 retracts, the transmitting coil 2 is far away from the receiving coil 3, the magnetic field intensity between the transmitting coil 2 and the receiving coil 3 is reduced, and the damage to a human body or other objects caused by the magnetic field is avoided.

The modules or units of the embodiments of the present application can be combined or separated according to actual requirements.

The above are some embodiments of the present application, and it should be noted that those skilled in the art will be able to realize the present invention. Without departing from the principles of the present application, several improvements and modifications may be made, and such improvements and modifications are also considered to be within the scope of the present application.

Claims

1. A wireless charging apparatus, comprising:

the charging body comprises a receiving coil, and the receiving coil is used for receiving the electromagnetic signal of the transmitting coil, converting the electromagnetic signal into a current signal and outputting the current signal to a battery of the charging body; and

2. The wireless charging device of claim 1, further comprising a first receiving cavity and a protection baffle covering an opening of the first receiving cavity, wherein the first retractable element and the receiving coil are disposed in the first receiving cavity, and when the charging body needs to be charged, the protection baffle is moved away, and the first retractable element pushes the receiving coil to extend out of the opening of the first receiving cavity and approach the transmitting coil.

3. The wireless charging device of claim 2, further comprising a driving assembly and a control assembly, wherein the control assembly is electrically connected to the driving assembly and the protective baffle, the driving assembly is connected to the first telescopic assembly, and the control assembly is configured to move the protective baffle away and control the driving assembly to drive the first telescopic assembly to extend when the charging body needs to be charged, so that the distance between the receiving coil and the transmitting coil is reduced.

4. The wireless charging device according to claim 3, wherein the driving assembly is a motor, the first telescopic assembly includes a first engaging member and a second engaging member connected to each other, the first engaging member is connected to an output shaft of the motor, the second engaging member is connected to the receiving coil, when the output shaft of the motor rotates, the first engaging member is driven by the output shaft of the motor to rotate, the second engaging member is driven by the first engaging member to move linearly, and the receiving coil is telescopic relative to the transmitting coil under the action of the second engaging member.

5. The wireless charging device according to claim 3, wherein the driving assembly is a motor, the first telescopic assembly includes a first connecting rod and a second connecting rod, one end of the first connecting rod is sleeved on an output shaft of the motor, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is rotatably connected to the receiving coil, and when the output shaft of the motor rotates, the first connecting rod and the second connecting rod are gradually opened or closed under the action of the motor to drive the receiving coil to be telescopic relative to the transmitting coil.

6. The wireless charging device of claim 2, wherein the first telescopic assembly comprises a magnetic member and an elastic member, the magnetic member is disposed opposite to the receiving coil and fixed between the receiving coil and the bottom wall of the first receiving slot, the elastic member is connected between the receiving coil and the bottom wall of the first receiving slot, a magnetic force can be generated between the magnetic member and the receiving coil, and the receiving coil is close to or away from the transmitting coil under the action of the magnetic force.

7. The wireless charging device of claim 6, wherein the magnetic member is a coil, the magnetic member is electrically connected to the battery of the charging body to receive a current flowing through the battery of the charging body, and when the current flows through the magnetic member, a magnetic force is generated between the magnetic member and the receiving coil.

8. A vehicle, characterized by comprising the wireless charging device according to any one of claims 1 to 7, wherein the wireless charging device is arranged on the top or the side of the vehicle.

9. A wireless charging system comprising a transmitting coil and a vehicle as claimed in claim 8.

10. The wireless charging system of claim 9, further comprising a bracket and a second telescopic assembly, wherein one end of the bracket is fixed to the ground, the other end of the bracket fixes the transmitting coil and the second telescopic assembly, the second telescopic assembly can be telescopic, and the telescopic end of the second telescopic assembly is connected to the transmitting coil, so that the transmitting coil is close to or far away from the receiving coil.