Wireless charging device and vehicle

Abstract

The utility model relates to a wireless charging device and a vehicle, and the wireless charging device comprises a wireless charging module which is used for carrying out the wireless charging of electronic equipment; the shielding coil is arranged around the periphery of the charging module in a winding manner; the wireless charging device further comprises a capacitor, the capacitor is connected with the shielding coil in parallel, and the total impedance of the shielding coil connected with the capacitor in parallel is inductive. The charging device has the effects of reducing the leakage magnetic field generated by the charging device and improving the magnetic field safety level of the in-vehicle space.

Description

Technical Field

[0001] The present application relates to the technical field of charging equipment, and in particular to a wireless charging device and a vehicle. Background Art

[0002] At present, in order to realize the convenient charging of electronic products (mainly mobile phones) of car drivers and passengers, many car models have integrated in-vehicle wireless charging transmission platforms. Based on the principle of electromagnetic induction, the wireless electromagnetic energy receiver integrated inside the electronic products will receive electromagnetic energy. Although the current in-vehicle mobile phone wireless charging system generally adopts short-range inductive wireless energy transmission, in addition to the magnetic energy received by the mobile phone receiving coil, a small part of the magnetic field will also escape into the space inside the car, thus posing a certain threat to the electromagnetic safety of the passengers in the car.

[0003] In the related art, for the convenience of use, a horizontally placed and open wireless charging structure is often used, and the magnetic field generated by it is generally difficult to meet the more stringent magnetic field safety requirements. Utility Model Content

[0004] The present application is proposed to solve the above-mentioned problem. According to one aspect of the present application, a wireless charging device is provided, wherein the device comprises: a wireless charging module, wherein the wireless charging module is used to wirelessly charge an electronic device; a shielding coil, wherein the shielding coil is wound around the wireless charging module; the wireless charging device further comprises a capacitor, wherein the capacitor is connected in parallel with the shielding coil, and the total impedance of the shielding coil connected in parallel with the capacitor is inductive.

[0005] Exemplarily, the capacitor is a chip capacitor.

[0006] Exemplarily, the wireless charging module includes a support plate and a wireless charging coil disposed on the support plate, and the wireless charging coil is used to wirelessly charge the electronic device.

[0007] Exemplarily, the shielding coil is wound around the support plate.

[0008] Exemplarily, the device further includes a coil isolator, which is disposed between the shielding coil and the wireless charging coil, and is used to isolate the coupling between the shielding coil and the wireless charging coil.

[0009] Exemplarily, the support plate is provided with a receiving groove, the wireless charging coil is located inside the receiving groove, the receiving groove is used to receive the electronic device, the shielding coil is arranged around the support plate, and the coil isolation piece is arranged on the inner wall of the receiving groove.

[0010] Exemplarily, the coil isolator is a magnetic non-conductive material; or the coil isolator is a flexible ferrite sheet.

[0011] Exemplarily, there are a plurality of coil isolation members, and two adjacent coil isolation members are electrically connected.

[0012] Exemplarily, the coil isolating member is annular and is disposed around the supporting plate.

[0013] Exemplarily, the device further includes a magnetic field shielding component, which is disposed at the bottom of the wireless charging coil.

[0014] Exemplarily, the magnetic field shielding component includes a ferrite plate, and the ferrite plate is disposed at the bottom of the wireless charging coil.

[0015] Exemplarily, the magnetic field shielding component further includes an aluminum shielding plate, and the aluminum shielding plate is arranged at the bottom of the ferrite plate.

[0016] Exemplarily, the number of the wireless charging coils is one or more.

[0017] According to another aspect of the present application, a vehicle is provided, comprising the above-mentioned wireless charging device.

[0018] The wireless charging device in the present application is provided with a shielding coil wound around the wireless charging module. When the wireless charging module is working for charging, the shielding coil can be used to reduce the leakage magnetic field around the charging device during charging, thereby achieving the effect of improving the magnetic field safety level in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0020] Figure 1 A schematic structural diagram of a wireless charging device in an embodiment of the present application is shown.

[0021] Figure numerals: 1. Support plate; 2. Coil isolation member; 3. Capacitor; 4. Shielding coil; 5. Wireless charging module; 51. Wireless charging coil; 6. Receiving coil; 7. Ferrite plate; 8. Aluminum shielding plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present application more obvious, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments of the present application described in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0023] like Figure 1 As shown, a wireless charging device according to an embodiment of the present application comprises: a wireless charging module 5 and a shielding coil 4. The wireless charging module 5 is used to wirelessly charge an electronic device. The shielding coil 4 is wound around the wireless charging module 5.

[0024] The wireless charging device in the present application is provided with a shielding coil 4 wound around the wireless charging module. When the wireless charging module 5 is working for charging, the shielding coil 4 can reduce the leakage magnetic field around the charging device, thereby achieving the effect of improving the magnetic field safety level in the vehicle.

[0025] Exemplarily, the wireless charging module 5 comprises a support plate 1 and a wireless charging coil 51 disposed on the support plate 1 , wherein the wireless charging coil 51 is used to wirelessly charge the electronic device. The shielding coil 4 is wound around the support plate 1 .

[0026] Exemplarily, the shape of the shielding coil 4 is determined according to the shape of the support plate 1 (wound closely fitting its boundary). In some embodiments, the cross-section of the support plate 1 is trapezoidal, and the shielding coil 4 is also formed into an approximate trapezoid after winding.

[0027] Exemplarily, the charging device further includes a capacitor 3 , which is connected in parallel with the shielding coil 4 , and the total impedance of the shielding coil 4 after the capacitor 3 is connected in parallel is inductive.

[0028] Exemplarily, the wireless charging device in the embodiment of the present application further includes a coil isolator 2, which is installed between the shielding coil 4 and the wireless charging coil 51. Exemplarily, the coil isolator 2 is a flexible ferrite sheet or other magnetic non-conductor material. The coil isolator 2 is used to isolate the coupling between the shielding coil 4 and the wireless charging coil 51.

[0029] Exemplarily, a receiving groove is provided on the support plate 1, the wireless charging coil 51 is located inside the receiving groove, the receiving groove is used to receive the electronic device, and the shielding coil 4 is arranged around the support plate 1. In some embodiments, the coil isolator 2 is arranged on the inner wall of the receiving groove.

[0030] In some embodiments, the coil isolator 2 has different settings. First, the coil isolator 2 is in the shape of a long strip, and the coil isolator 2 is arranged between the shielding coil 4 and the support plate 1. A plurality of coil isolators 2 are arranged between the shielding coil 4 and the support plate 1, and two adjacent coil isolators 2 are electrically connected. The electrical connection method can be: connecting the ends of two adjacent coil isolators 2 by a wire to achieve electrical connection. Second: the coil isolator 2 is in the shape of a ring, and the coil isolator 2 is sleeved on the outside of the support plate 1, so as to be arranged around the support plate 1. Exemplarily, the above-mentioned multiple coil isolators 2 or the ring-shaped coil isolator 2 can not only be arranged around the outside of the support plate 1, but also can be arranged around the inner wall of the support plate 1.

[0031] It should be noted that the coil isolator 2 is set according to the coupling size between the shielding coil 4 and the wireless charging coil 51. If the coupling between the shielding coil 4 and the wireless charging coil 51 is very small, the coil isolator 2 may not be set. Otherwise, the coil isolator 2 needs to be set to reduce the coupling between the shielding coil 4 and the wireless charging coil 51 to ensure the safety level of the magnetic field in the car. After the coil isolator 2 is set between the shielding coil 4 and the wireless charging coil 51, the coupling between the shielding coil 4 and the wireless charging coil 51 can be effectively reduced, and the impact on the charging efficiency can be reduced.

[0032] The wireless charging module 5 in the present application is introduced below. The charging device may include one or more wireless charging modules 5. One wireless charging module 5 may include one or more wireless charging coils 51. Figure 1 As shown, two wireless charging coils 51 are provided on the support plate 1 in the figure. The wireless charging coil 51 is fixedly mounted on the support plate 1. By way of example, a receiving coil 6 is provided at the bottom of the device to be charged (such as a mobile phone). When the wireless charging coil 51 is powered on and working, the electronic device can be charged by cooperating with the receiving coil 6 and the wireless charging coil 51. By way of example, the support plate 1 separates the wireless charging coil 51 and the receiving coil 6, and the support plate 1 can provide support for the receiving coil 6 and the electronic device. Among them, the two wireless charging coils 51 on the support plate 1 are symmetrically arranged.

[0033] Exemplarily, the capacitor 3 used to be connected in parallel with the shielding coil 4 can be installed on the shielding coil 4 or the support plate 1 by bonding or the like. When performing parallel connection, you can choose to connect the capacitor 3 and the shielding coil 4 in parallel at both ends. Among them, the capacitor 3 connected in parallel can select a capacitor 3 of smaller size such as a chip capacitor. After the above-mentioned capacitor 3 and the shielding coil 4 are connected in parallel, the total impedance is inductive, and a certain degree of impedance matching is achieved by the parallel chip capacitors. The shielding coil 4 combines with the parallel capacitor 3 to generate a canceling magnetic field with an amplitude equal to and opposite to the original leakage magnetic field, thereby greatly reducing the leakage magnetic field generated by the original system.

[0034] The wireless charging device further includes a magnetic field shielding component disposed at the bottom of the charging module 5 , and the magnetic field shielding component is fixedly mounted on the bottom of the wireless charging coil 51 by bonding, welding, or the like.

[0035] The magnetic field shielding member includes a ferrite plate 7 and an aluminum shielding plate 8. The ferrite plate 7 is arranged at the bottom of the wireless charging coil 51, and the aluminum shielding plate 8 is arranged at the bottom of the ferrite plate 7. The magnetic field shielding member can reduce the downward leakage magnetic field generated by the wireless charging coil 51, and the shielding coil 4 and the capacitor 3 can reduce the leakage magnetic field toward the surroundings, thereby better shielding the leakage magnetic field to ensure the magnetic field safety of the vehicle interior space.

[0036] During installation, after the charging module 5 is installed, first install the magnetic field shielding member at the bottom of the wireless charging coil 51, that is, install the ferrite plate 7 and install the aluminum shielding plate 8 at the bottom of the ferrite plate 7. Then install the coil isolation member 2 (such as a ferrite sheet) around the support plate 1 of the wireless charging device, and then wind the shielding coil 4 around the support plate 1 and the outside of the coil isolation member 2 and fix them. Finally, connect a capacitor 3 of a suitable value in parallel, thereby completing the assembly of the wireless charging device.

[0037] Exemplarily, for the value of the above-mentioned capacitor 3, it can be obtained specifically by calculation. Exemplarily, the value of the optimal parallel capacitor 3 can be estimated by analytical method, and the approximate range of the optimal capacitor 3 value can be determined. Afterwards, a simulation model including a mobile phone wireless charging module 5 and a passive shielding device is established, and the value of the parallel capacitor 3 is subjected to parameter scanning simulation in the simulation model. For each simulation, the magnetic field values ​​of the key test points corresponding to different parallel capacitance values ​​are derived when the simulation ends. Then, the magnetic field curves of these multiple sets of magnetic field values ​​obtained are plotted in MATLAB, and the group with the smallest magnetic field is found to determine the optimal parallel capacitance value.

[0038] The wireless charging device in the present application is provided with a shielding coil 4 wound around the wireless charging module 5. When the charging device is working to charge, the shielding coil 4 can reduce the leakage magnetic field around, thereby reducing the leakage magnetic field. At the same time, the leakage magnetic field can be further reduced by setting a capacitor 3 in parallel on the shielding coil 4. Thereby, the effect of improving the magnetic field safety level in the car is achieved. In addition, the coil isolation member 2 between the shielding coil 4 and the wireless charging coil 51 can reduce the coupling between the wireless charging coil 51 and the shielding coil 4, thereby reducing the impact on the charging efficiency.

[0039] The embodiment of the present application also provides a vehicle, which is provided with a wireless charging device as described above. The vehicle in the embodiment of the present application adopts the above-mentioned wireless charging device, which is provided with a shielding coil wound around the wireless charging module. When the charging device is working to charge, the shielding coil can be used to reduce the leakage magnetic field around, thereby reducing the leakage magnetic field. At the same time, the leakage magnetic field can be further reduced by providing a capacitor in parallel with the shielding coil. In addition, the coupling between the wireless charging coil and the shielding coil can be reduced by the coil isolation piece, thereby reducing the impact on the charging efficiency. The present application has the effect of shielding the leakage magnetic field of the wireless charging device, thereby improving the magnetic field safety level in the vehicle.

[0040] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0041] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0042] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0043] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0044] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various inventive aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present application should not be interpreted as reflecting the following intention: the claimed application requires more features than the features clearly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with features less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby explicitly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0045] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0046] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0047] The various component embodiments of the present application can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the functions of some modules according to the embodiments of the present application. The present application can also be implemented as a vehicle-mounted system program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0048] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented with the aid of hardware including several different elements and with the aid of appropriately programmed computers. In a unit claim listing several on-board systems, several of these on-board systems may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0049] The above is only a specific implementation method or description of a specific implementation method of the present application, and the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A wireless charging device, characterized in that: The device comprises: A wireless charging module, wherein the wireless charging module is used to wirelessly charge an electronic device; A shielding coil, wherein the shielding coil is arranged around the wireless charging module; The wireless charging device further includes a capacitor, which is connected in parallel with the shielding coil, and the total impedance of the shielding coil connected in parallel with the capacitor is inductive.

2. The wireless charging device according to claim 1, characterized in that: The capacitor is a chip capacitor.

3. The wireless charging device according to claim 1, characterized in that: The wireless charging module includes a support plate and a wireless charging coil arranged on the support plate, and the wireless charging coil is used to wirelessly charge the electronic device.

4. The wireless charging device according to claim 3, characterized in that: The shielding coil is wound around the support plate.

5. The wireless charging device according to claim 4, characterized in that: The device further includes a coil isolator, which is disposed between the shielding coil and the wireless charging coil, and is used to isolate the coupling between the shielding coil and the wireless charging coil.

6. The wireless charging device according to claim 5, characterized in that: The support plate is provided with a receiving groove, the wireless charging coil is located inside the receiving groove, the receiving groove is used to receive the electronic device, the shielding coil is arranged around the support plate, and the coil isolation piece is arranged on the inner wall of the receiving groove.

7. The wireless charging device according to claim 5, characterized in that: The coil isolating member is made of a magnetic non-conductive material; or the coil isolating member is a flexible ferrite sheet.

8. The wireless charging device according to claim 5, characterized in that: There are multiple coil isolation pieces, and two adjacent coil isolation pieces are electrically connected.

9. The wireless charging device according to claim 5, characterized in that: The coil isolating member is annular in shape, is located between the shielding coil and the supporting plate, and is disposed around the supporting plate.

10. The wireless charging device according to claim 3, characterized in that: The device further comprises a magnetic field shielding member, which is arranged at the bottom of the wireless charging coil.

11. The wireless charging device according to claim 10, characterized in that: The magnetic field shielding component includes a ferrite plate, and the ferrite plate is arranged at the bottom of the wireless charging coil.

12. The wireless charging device according to claim 11, characterized in that: The magnetic field shielding component further includes an aluminum shielding plate, and the aluminum shielding plate is arranged at the bottom of the ferrite plate.

13. The wireless charging device according to any one of claims 3 to 12, characterized in that: The number of the wireless charging coil is one or more.

14. A vehicle, characterized in that: The vehicle is provided with a wireless charging device as described in any one of claims 1-13.

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