TW201511443A - Electromagnetic resonance wireless charging system and device - Google Patents

Abstract

An electromagnetic resonance wireless charging system and device are provided, and the system includes the electromagnetic resonance wireless charging device and a mobile device. The electromagnetic resonance wireless charging device includes a charging module, a charging coil and at least a magnetic component, and the magnetic component surrounds the charging coil. The mobile device includes a battery module, a sensing coil and an attracting component. When the mobile device is put on a surface of the electromagnetic resonance wireless charging device, the attracting component is attracted by one of the magnetic component, and the sensing coil is essentially overlapped with a part of the charging coil by looking alone a normal vector of the surface.

Description

Electromagnetic resonance wireless charging system and device

The present invention relates to a wireless charging device, and more particularly to an electromagnetic resonant wireless charging system and apparatus.

At present, the main wireless charging technologies include electromagnetic induction wireless charging technology and electromagnetic resonance wireless charging technology. Electromagnetic induction wireless charging technology utilizes the principle of electromagnetic induction similar to a transformer. When a current passes through the primary coil, a magnetic field is generated. The generated magnetic field generates a current in the secondary coil and can be used to charge the battery. The advantage of electromagnetic induction wireless charging technology is that the power is large, but the disadvantage is that the charging distance is short (usually less than 1 cm). On the other hand, the principle of electromagnetic resonance wireless charging technology is similar to acoustic resonance. Low frequency electromagnetic waves are generated when electrical energy passes through the coils in the transmitter. This low frequency electromagnetic wave propagates in the air and reaches a coil having the same resonant frequency in the receiver, thereby generating electrical energy to charge the battery.

The advantage of electromagnetic resonance wireless charging technology is that the charging distance is far, so It is beneficial for multiple people to use a single charger to charge their mobile devices such as mobile phones at the same time. However, since electric energy is converted into electromagnetic waves, it radiates in all directions, resulting in relatively more energy lost during charging. Therefore, how to enable a plurality of users to efficiently charge their mobile devices such as mobile phones is a subject of research by those skilled in the art.

In view of this, the present invention provides an electromagnetic resonant wireless charging system and apparatus that allows more than one user to easily and efficiently charge their mobile devices.

The invention provides an electromagnetic resonance wireless charging system, which comprises an electromagnetic resonance wireless charging device and a first mobile device. The electromagnetic resonance wireless charging device comprises a charging module, a charging coil and at least one magnetic component. The charging module is coupled to the charging coil, and the magnetic element surrounds the charging coil. The first mobile device includes a first battery module, a first induction coil, and a first adsorption element, and the first battery module is coupled to the first induction coil. When the first mobile device is placed on the first plane of the electromagnetic resonance wireless charging device, the first adsorption element is attracted to the first magnetic element of the magnetic element, and the first sensing is viewed from the normal vector of the first plane The coil substantially overlaps the charging coil of the first portion.

The invention further provides an electromagnetic resonance wireless charging device, which comprises a charging module, a charging coil and at least one magnetic component. The charging coil is coupled to the charging module, and the magnetic element surrounds the charging coil. When the first line When the moving device is placed on the first plane of the electromagnetic resonance wireless charging device, the first adsorption element of the first mobile device is attracted to the first magnetic element of the magnetic element, and viewed from the normal vector of the first plane The first inductive coil of a mobile device substantially overlaps the charging coil of the first portion.

Based on the above, the present invention provides at least one magnetic element around the charging coil of the electromagnetic resonance wireless charging device. When the user brings the mobile device with the adsorption element close to or placed on the surface of the electromagnetic resonance wireless charging device, the adsorption element on the mobile device is adsorbed by the magnetic element on the electromagnetic resonance wireless charging device, so that the sensing on the mobile device The coil overlaps with a portion of the charging coil. Thereby, more than one user can easily and efficiently charge his mobile device.

The above described features and advantages of the invention will be apparent from the following description.

10‧‧‧Electromagnetic Resonance Wireless Charging System

102, 504‧‧‧ surface

11, 41, 51‧‧‧ electromagnetic resonance wireless charging device

110‧‧‧bearers

112_1~112_4, 412, 512_1‧‧‧ magnetic components

114‧‧‧Charging coil

116‧‧‧Charging module

12, 13‧‧‧ mobile devices

122, 132‧‧‧Adsorption elements

124, 134‧‧‧ induction coil

126‧‧‧ battery module

55_1, 55_2‧‧‧ normal vector

CI‧‧‧ drive current

SI‧‧‧Induction current

1A, 1B and 2 are schematic diagrams of an electromagnetic resonance wireless charging system according to an embodiment of the invention.

FIG. 3 is a schematic diagram of a plurality of mobile devices simultaneously placed on an electromagnetic resonance wireless charging device according to an embodiment of the invention.

4 is a schematic diagram of an electromagnetic resonant wireless charging system according to another embodiment of the present invention.

FIG. 5 is an electromagnetic resonant wireless charging according to another embodiment of the present invention. Schematic diagram of the system.

1A, 1B, and 2 are schematic diagrams of an electromagnetic resonance wireless charging system according to an embodiment of the invention. Referring to FIG. 1A, FIG. 1B and FIG. 2 simultaneously, the electromagnetic resonance wireless charging system 10 includes an electromagnetic resonance wireless charging device 11 and a mobile device 12. The electromagnetic resonance wireless charging device 11 includes magnetic elements 112_1~112_4, a charging coil 114, and a charging module 116.

The magnetic elements 112_1 to 112_4 are, for example, various magnetic substances such as magnets, and the number of the magnetic elements 112_1 to 112_4 may be one or more. In the present embodiment, the magnetic elements 112_1~112_4 are disposed, for example, around the periphery or inside of the charging coil 114. For example, the magnetic element 112_1 may be disposed in a first outer direction of the charging coil 114 (eg, above the charging coil 114), and the magnetic element 112_2 may be disposed in a second outer direction of the charging coil 114 (eg, to the right of the charging coil 114) The magnetic element 112_3 may be disposed in a third outer direction of the charging coil 114 (eg, below the charging coil 114), and the magnetic element 112_4 may be disposed in a fourth outer direction of the charging coil 114 (eg, to the left of the charging coil 114) . Further, in an embodiment, it is also possible to selectively provide only a part of the magnetic elements 112_1 to 112_4 without setting all of the magnetic elements 112_1 to 112_4 and the like at the same time.

Further, the electromagnetic resonance wireless charging device 11 can be combined with the carrier 110. For example, the magnetic elements 112_1~112_4 may be disposed on the surface of the carrier 110 or the inside of the carrier 110 near the surface of the carrier 110, and the charging coil 114 For example, it is disposed inside the carrier 110. In the present embodiment, the material of the carrier 110 is, for example, a material such as wood or plastic that does not easily affect the operation of the electromagnetic resonance wireless charging device 11. Alternatively, the material of the carrier 110 may also be made of a metal or the like before the operation of the electromagnetic resonance wireless charging device 11 is affected. The invention is not limited thereto.

The mobile device 12 is, for example, a portable electronic device having a rechargeable battery, such as a mobile phone, a smart phone, a tablet PC, a portable game machine, or a notebook computer. The mobile device 12 includes an adsorption component 122, an induction coil 124, and a battery module 126. In the present embodiment, the adsorption member 122 is made of, for example, a metal material. Alternatively, in an embodiment, the adsorption element 122 may also have a magnetic material (eg, a magnet) corresponding to the magnetic elements 122_1 122 122_4, which is not limited by the present invention.

As shown in FIG. 1A, in the present embodiment, the magnetic elements 112_1~112_4 are disposed around the charging coil 114, for example, at a predetermined distance, and the predetermined distance is approximately between the adsorption element 122 and the induction coil 124 of the mobile device 12. The distance is equal. Moreover, the size of the charging coil 114 of the electromagnetic resonant wireless charging device 11 (eg, the radius of the charging coil 114) is substantially equal to a multiple of the size of the inductive coil 124 of the mobile device 12 (eg, the radius of the inductive coil 124). A plurality of users can simultaneously utilize the electromagnetic resonance wireless charging device 11 to charge their mobile device (e.g., mobile device 12).

In the present embodiment, when the mobile device 12 is placed on the plane 102 of the electromagnetic resonance wireless charging device 11, or near the plane 102 of the electromagnetic resonance wireless charging device 11, the adsorption element 122 of the mobile device 12 can be adsorbed to the electromagnetic resonance wireless charging. At least one of the magnetic elements 112_1~112_4 of the electrical device 11 (eg, magnetic element 112_1). At this time, the induction coil 124 of the mobile device 12 substantially overlaps with the charging coil 114 of a portion of the electromagnetic resonance wireless charging device 11 along the normal vector of the plane 102.

In the present embodiment, the charging coil 114 of the electromagnetic resonance wireless charging device 11 and the induction coil 124 of the mobile device 12 are, for example, wound by a metal wire. The charging coil 114 is coupled to the charging module 116 , and the induction coil 124 is coupled to the battery module 126 . When the mobile device 12 is placed on the surface 102 of the electromagnetic resonance wireless charging device 11, or is close to the electromagnetic resonance wireless charging device 11, the electromagnetic resonance wireless charging device 11 can charge the mobile device 12 through the electromagnetic resonance wireless charging technology. For example, the charging coil 114 of the electromagnetic resonance wireless charging device 11 can generate an induced current on the induction coil 124 of the mobile device 12 through the electromagnetic resonance wireless charging technology, and provide the induced current to the battery module 126 of the mobile device 12 to act on The battery module 126 of the device 12 is charged.

In detail, as shown in FIG. 2, the charging module 116 of the electromagnetic resonance wireless charging device 11 can provide the driving current CI to the charging coil 114. For example, the charging module 116 is connected to an external power source (eg, a socket) through a power adapter, for example, to obtain a driving current CI. The charging coil 114 converts the received driving current CI into an electromagnetic wave, and then emits it through a specific resonant frequency. The induction coil 124 of the mobile device 12 can receive the electromagnetic waves emitted by the charging coil 114 and convert the received electromagnetic waves into an induced current SI to provide the induced current SI to the battery module 126 of the mobile device 12.

Further, based on the basic characteristics of the radiation, the closer to the charging coil 114 of the electromagnetic resonance wireless charging device 11, the higher the density of the electromagnetic waves emitted from the charging coil 114. On the contrary, the further away from the charging coil 114 of the electromagnetic resonance wireless charging device 11, the density of electromagnetic waves emitted from the charging coil 114 is also reduced. Further, when the mobile device 12 is charged by the electromagnetic resonance wireless charging device 11, the greater the density of electromagnetic waves from the charging coil 114 of the electromagnetic resonant wireless charging device 11 that can be received by the position of the induction coil 124 of the mobile device 12 The greater the induced current that the induction coil 124 can provide to the battery module 126. On the contrary, if the density of the electromagnetic wave from the charging coil 114 of the electromagnetic resonance wireless charging device 11 that can be received by the position of the induction coil 124 of the mobile device 12 is smaller, the induction coil 124 can provide the induced current to the battery module 126. The smaller it is.

That is to say, in the present embodiment, even if the user simply places the mobile device 12 on the plane 102 of the electromagnetic resonance wireless charging device 11, the induction coil 124 of the mobile device 12 can be easily passed through the adsorption member 122. The charging coil 114 of the electromagnetic resonance wireless charging device 11 is such that the induction coil 124 of the mobile device 12 is at a position where the density of the electromagnetic wave emitted by the charging coil 114 of the electromagnetic resonance wireless charging device 11 is large (ie, the action The induction coil 124 of the device 12 and the charging coil 114 of the electromagnetic resonant wireless charging device 11 substantially overlap each other, thereby generating and providing a large induced current to the battery module 126.

In addition, FIG. 3 is a schematic diagram of a plurality of mobile devices simultaneously placed on an electromagnetic resonance wireless charging device according to an embodiment of the invention. Referring to FIG. 3, in an embodiment, the electromagnetic resonance wireless charging system 10 may also include electromagnetic resonance wireless. The charging device 11, the mobile device 12, and the mobile device 13. Similar to the mobile device 12, the mobile device 13 includes an adsorption element 132 and an induction coil 134, and the arrangement and operation of the adsorption element 132 and the induction coil 134 are similar to the adsorption element 122 and the induction coil 124 of the mobile device 12, respectively. In addition, similar to the mobile device 12, the mobile device 13 also includes a battery module similar to the battery module 126, and details are not described herein.

When the mobile device 13 is simultaneously with the mobile device 12 or the mobile device 13 is placed separately on the plane 102 of the electromagnetic resonance wireless charging device 11, the adsorption element 132 of the mobile device 13 can be attracted to the magnetic element 112_1. Further, in an embodiment, if the mobile device 13 is placed at a different position on the plane 102 of the electromagnetic resonance wireless charging device 11, the adsorption element 132 is, for example, adsorbed to at least one of the remaining magnetic elements 112_2 to 112_4. At this time, from the normal vector of the plane 102, the induction coil 134 will substantially overlap with the other portion of the charging coil 114. That is to say, when a plurality of users simultaneously use the electromagnetic resonance wireless charging device 11 to charge their mobile devices, each mobile device can be easily placed at a position where the electromagnetic wave density for charging is high, thereby improving Charging efficiency of each mobile device.

4 is a schematic diagram of an electromagnetic resonant wireless charging system according to another embodiment of the present invention. Referring to FIG. 4, in the present embodiment, the electromagnetic resonance wireless charging system includes an electromagnetic resonance wireless charging device 41. The difference between the electromagnetic resonance wireless charging device 41 and the electromagnetic resonance wireless charging device 11 is that the electromagnetic resonance wireless charging device 41 replaces the magnetic elements 112_1 to 112_4 of the electromagnetic resonance wireless charging device 11 with the magnetic member 412.

Similar to the magnetic elements 112_1~112_4, the magnetic element 412 can be placed on the bearing The surface of the load 110 or its interior. In particular, the number of magnetic elements 412 is only one, and the magnetic elements 412 are completely spaced from the outside of the charging coil 114 by a predetermined distance from the charging coil 114. In addition, in an embodiment, the magnetic element 412 may also be disposed at a predetermined distance from the charging coil 114 and disposed around the inner side of the charging coil 114, etc., which is not limited by the present invention.

FIG. 5 is a schematic diagram of an electromagnetic resonance wireless charging system according to another embodiment of the present invention. Referring to FIG. 5, in the present embodiment, the electromagnetic resonance wireless charging system includes an electromagnetic resonance wireless charging device 51, a mobile device 12, and a mobile device 13, wherein the electromagnetic resonance wireless charging device 51 is similar to the electromagnetic resonance wireless charging device 11.

The main difference between the electromagnetic resonance wireless charging device 51 and the electromagnetic resonance wireless charging device 11 is that the electromagnetic resonance wireless charging device 51 further includes a magnetic element 512_1. In the present embodiment, the magnetic element 512_1 is, for example, disposed on the surface 504 of the electromagnetic resonance wireless charging device 51 with respect to the surface 102. Hereinafter, the mobile device 12 is adsorbed to the surface 102 of the electromagnetic resonance wireless charging device 51, and the mobile device 13 is adsorbed to the surface 504 of the electromagnetic resonance wireless charging device 51 as an example. In addition, the embodiment in which the mobile device 12 is attracted to the surface 102 has been described above and will not be described herein.

When the mobile device 13 is placed on the electromagnetic resonant wireless charging device 11 with respect to the surface 504 of the surface 102, the adsorption element 132 of the mobile device 13 is, for example, adsorbed to the magnetic element 512_1 and along the normal vector 55_1 or plane 504 of the plane 102. The normal vector 55_2, the induction coil of the mobile device 13 (for example, the The induction coil 134) also substantially overlaps a portion of the charging coil of the electromagnetic resonant wireless charging device 51 (e.g., the charging coil 114 of FIG. 1A). That is to say, in the arrangement, the magnetic element 512_1 and the magnetic element 112_1 are, for example, mutually symmetrical, and viewed from the normal vector 55_1 of the plane 102 or the normal vector 55_2 of the plane 504, the magnetic element 512_1 and the magnetic element 112_1 may be partial or Fully overlapping. Further, the electromagnetic resonance wireless charging device 51 may also include a magnetic element or the like that is symmetrical with the magnetic elements 112_2 to 112_4 and disposed on the surface 504.

While the mobile device 13 is attracted to the surface 504 of the electromagnetic resonance wireless charging device 51, the mobile device 12 can also be adsorbed to the surface 102 of the electromagnetic resonant wireless charging device 51, so that the mobile device 12 and the mobile device 13 can simultaneously wirelessly charge through the electromagnetic resonance. The device 51 is charged. In addition, more mobile devices having similar architectures can also be adsorbed on one surface or the corresponding two surfaces of the electromagnetic resonance wireless charging devices 11, 41 and/or 51 through their adsorption elements simultaneously, while the electromagnetic wave density is relatively high. High position for charging.

In summary, the present invention provides at least one magnetic element around or inside the charging coil of the electromagnetic resonance wireless charging device. When the user brings the mobile device with the adsorption element close to or placed on a plane of the electromagnetic resonance wireless charging device, the adsorption element on the mobile device is adsorbed by the magnetic element, so that the induction coil on the mobile device and a part of the electromagnetic resonance The charging coils of the wireless charging device overlap. Thereby, the induction coils of the plurality of mobile devices can be simultaneously aligned at a position where the electromagnetic wave density is high (for example, a position overlapping the charging coil of the electromagnetic resonance wireless charging device), thereby improving the mobile device through the electromagnetic resonance wireless charging device. When charging Charging efficiency.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Electromagnetic Resonance Wireless Charging System

102‧‧‧ surface

11‧‧‧Electromagnetic resonance wireless charging device

110‧‧‧bearers

112_1~112_4‧‧‧ Magnetic components

114‧‧‧Charging coil

12‧‧‧Mobile devices

122‧‧‧Adsorption elements

124‧‧‧Induction coil

Claims (10)

An electromagnetic resonance wireless charging system includes: an electromagnetic resonance wireless charging device, comprising: a charging module, a charging coil and at least one magnetic component, the charging module is coupled to the charging coil, and the at least one magnetic component surrounds the charging And a first mobile device, a first battery module, a first induction coil, and a first adsorption element, wherein the first battery module is coupled to the first induction coil, wherein the first mobile device When placed on a first plane of the electromagnetic resonant wireless charging device, the first adsorption component is attracted to a first magnetic component of the at least one magnetic component, and viewed from a normal vector of the first plane, The first inductive coil substantially overlaps the first portion of the charging coil. The electromagnetic resonance wireless charging system of claim 1, wherein the charging module of the electromagnetic resonance wireless charging device provides a driving current to the charging coil, and the charging coil is transmitted through an electromagnetic resonance wireless charging technology. An induced current is generated on the first induction coil of the first mobile device to provide the induced current to the first battery module of the first mobile device. The electromagnetic resonance wireless charging system of claim 1, wherein the first adsorption element has a metal material or a magnetic material corresponding to the at least one magnetic element. The electromagnetic resonance wireless charging system of claim 1, further comprising: a second mobile device, comprising a second battery module, a second induction coil, and a second adsorption module, the second battery module is coupled to the second induction coil, wherein when the second mobile device is placed on the first plane of the electromagnetic resonance wireless charging device, the second adsorption component is attracted to The first magnetic element or a second magnetic element of the at least one magnetic element, and viewed from the normal vector of the first plane, the second inductive coil substantially overlaps the charging coil of a second portion. The electromagnetic resonance wireless charging system of claim 1, wherein the first adsorption device is disposed when the first mobile device is placed on a second plane of the electromagnetic resonance wireless charging device with respect to the first plane And adsorbing to a second magnetic element of the at least one magnetic element, and the first inductive coil substantially overlaps the charging coil of a third portion from a normal vector of the second plane. An electromagnetic resonance wireless charging device includes: a charging module; a charging coil coupled to the charging module; and at least one magnetic component surrounding the charging coil, wherein when a first mobile device is placed in the electromagnetic resonance wireless charging a first adsorption element of the first mobile device is attracted to a first magnetic element of the at least one magnetic element, and viewed from a normal vector of the first plane, A first inductive coil of a mobile device substantially overlaps a first portion of the charging coil. The electromagnetic resonance wireless charging device of claim 6, wherein the charging module provides a driving current to the charging coil, and the charging coil transmits the electromagnetic resonance wireless charging technology to the first mobile device Induction coil An induced current is generated to provide the induced current to the first battery module of the first mobile device. The electromagnetic resonance wireless charging device of claim 6, wherein the first adsorption element has a metal material or a magnetic material corresponding to the at least one magnetic element. The electromagnetic resonance wireless charging device of claim 6, wherein when a second mobile device is placed on the first plane of the electromagnetic resonance wireless charging device, a second adsorption component of the second mobile device a second magnetic element adsorbed to the first magnetic element or the at least one magnetic element, and viewed from the normal vector of the first plane, a second induction coil and a second part of the second mobile device The charging coils substantially overlap. The electromagnetic resonance wireless charging device of claim 6, wherein the first mobile device is placed when the first mobile device is placed on a second plane of the electromagnetic resonant wireless charging device with respect to the first plane The first adsorption element is adsorbed to a second magnetic element of the at least one magnetic element, and the first induction coil and the third part of the first mobile device are viewed from a normal vector of the second plane The charging coils substantially overlap.