JP2019146486A - Wireless charger and method for charging wirelessly - Google Patents

Abstract

To allow the concurrent wireless charge of a plurality of power reception end devices.SOLUTION: The present invention relates to a wireless charger for sending a current for charge using an electromagnetic field, the wireless charger including a transmission end part and a wireless power reception device, the transmission end part having a first transmission end coil surrounding a charge space and having an iron core standing plate around the first transmission end coil, which surround the charge space to reinforce the energy of the electromagnetic field of the charge space, and the power reception device having a reception end coil and a reception end iron core plate corresponding to the reception end coil. When the current for charge flows in the first transmission end coil, an electromagnetic field generates in the charge space and a current induced by the electromagnetic field generates in the reception end coil.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a wireless charging device and a charging method thereof, and more particularly to a device capable of wireless charging to a plurality of power receiving ends and a charging method thereof.

  A schematic diagram of a known wireless charging device is shown in FIG. 1, and includes a power transmission end 10 and a power reception end 20. The power transmission end 10 includes a transmission end coil 11 and a transmission end core plate 12. Similarly, a receiving end coil 21 and a receiving end iron core plate 22 are provided. The power transmission end 10 and the power reception end 20 are parallel and close to each other. When the transmission end coil 11 is energized, an electromagnetic field is generated, which is sent to the reception end core plate 22 via the transmission end core plate 12, and further the electromagnetic field. Generates inductive power via the receiving end coil 21 and achieves the purpose of wireless charging.

  However, all the known wireless charging devices are charged one-on-one, and all the devices at the power receiving end 20 are laid flat on the charging platform of the power transmitting end 10 to perform the wireless charging. Therefore, when it is necessary to perform wireless charging on more than one device at the power receiving end 20, after the device at the original power receiving end 20 is charged, the device at the other power receiving end 20 must be replaced. Therefore, it is very inconvenient and spends a lot of waiting time. The cause is that the electromagnetic field of the charging platform of the known power transmission end 10 is sent upward (as indicated by the arrow in the figure), and the iron core plate of the power receiving end 20 placed flat absorbs the electromagnetic field. Therefore, if the electromagnetic field is not sent further outward, and the charging platform of the power transmission end 10 is not large, a plurality of flatly placed power receiving end 20 devices cannot be accommodated, If the charging platform is large, it occupies a large space, so the possibility of commercialization is not high.

Taiwan Patent I472116 Specification Japanese Patent No. 5530491

  Therefore, by developing a method that can wirelessly charge multiple power receiving end devices, and designing a device that can place multiple power receiving end devices vertically, horizontally, horizontally, or diagonally, There is a need to achieve the objective of simultaneously performing wireless charging on a single power receiving end device and to reduce the space occupied by the charging platform.

  In order to achieve the above object, the main technical features of the present invention include a transmission end core and a transmission end coil, and the transmission end core includes a bottom plate and two upright plates to form a bowl shape, And a plurality of wireless power receiving devices can be arranged and placed therein, each of the wireless power receiving devices includes a receiving end coil and a receiving end iron core plate, and the receiving end The iron core plate is perpendicular to the vertical plate of the transmission end core. When a current flows through the transmission end coil, an electromagnetic field is generated in the charging space and passes through each receiving end core plate through the vertical plate of the transmission end core. An object of the present invention is to provide a wireless charging device that forms an electromagnetic field circuit and causes each receiving end coil to generate charging power by induction of the electromagnetic field.

  In order to achieve the above object, a further technical feature of the present invention is that a transmission end iron core having a bottom plate and two upright plates and having a charging space formed therein and at least one transmission end is provided. And arranging one or more wireless power receiving devices in the charging space, each including a receiving end coil and a receiving end core plate perpendicular to the standing plate of the transmission end core; Finally, when an electric current flows through the transmission end coil, an electromagnetic field is generated in the charging space, passes through each receiving end iron core plate through a standing plate of the transmission end iron core, forms an electromagnetic field circuit, and It is an object of the present invention to provide a wireless charging method for causing a receiving end coil to generate charging power by induction of the electromagnetic field.

  In order to achieve the above object, a further technical feature of the present invention is that a transmission end coil is wound on at least one set of concentric spiral planar coils and disposed on an inner surface of the bottom plate and / or at least one standing plate. Another object is to provide the wireless charging device.

  In order to achieve the above object, a further technical feature of the present invention is that the plurality of wireless power receivers are arranged in the charging space in parallel to the bottom plate, or the plurality of wireless power receivers are Wireless charging method arranged in the charging space perpendicular to the bottom plate, or wherein the plurality of wireless power receiving devices are arranged in the charging space not parallel or perpendicular to the bottom plate (inclined) Is to provide.

  In order to achieve the above object, a further technical feature of the present invention is that the transmission end core includes a plurality of transmission end cores, and includes at least one inner layer transmission end core and one outer layer transmission end core, and the inner layer transmission end core. Are arranged so as to overlap in the outer layer transmission end core, the two standing plates of the inner layer transmission end core are shorter than the two standing plates of the outer layer transmission end core, and the upper ends of the two standing plates of the outer layer transmission end core Is to provide the wireless charging device, which is bent inward and has an L shape.

  In order to achieve the above-mentioned object, a further technical feature of the present invention is a cylindrical shape including a bottom plate and at least one standing plate surrounding a side edge of the bottom plate, and having an opening at one end, in which a charging space is formed. A transmission end core on which one or more of the wireless power receivers can be disposed, and a first transmission end coil surrounding the inner surface of the upright plate, and each of the wireless power receivers includes a receiving end coil and a receiving end. And an iron core plate. When a current flows through the first transmission end coil, an electromagnetic field is generated in the charging space, and each receiving end coil induces the electromagnetic field so that all generate charging power. The object is to provide a charging device.

  In order to achieve the above-mentioned object, a further technical feature of the present invention is that a second transmission end coil is wound around a bottom plate to generate an electromagnetic field in a charging space, and the plurality of receiving end coils are electromagnetic field induction. An object of the present invention is to provide a wireless charging device including a second transmission end coil for generating charging power.

FIG. 1 is a schematic diagram of charging of a known wireless charging device. FIG. 2 is a schematic diagram of a preferred embodiment of the wireless charging device of the present invention. FIG. 3 is a schematic perspective view of FIG. FIG. 4 is a schematic perspective view of the first embodiment of the wireless charging apparatus of the present invention. FIG. 5 is a schematic perspective view of a second embodiment of the wireless charging apparatus of the present invention. FIG. 6 is a schematic perspective view of a third embodiment of the wireless charging apparatus of the present invention. FIG. 7 is a schematic perspective view of a fourth embodiment of the wireless charging apparatus of the present invention. FIG. 8 is a schematic diagram of another preferred embodiment of the wireless charging device of the present invention. FIG. 9 is a schematic view of still another preferred embodiment of the wireless charging device of the present invention. FIG. 10 is a schematic view of still another preferred embodiment in which the wireless charging device of FIG. 9 is inverted.

  The wireless charging device 100 of the present invention can simultaneously charge wirelessly to a plurality of wireless power receiving devices 200, and the plurality of wireless power receiving devices 200 may be portable devices such as smartphones and tablet PCs, or smart watches. Wearable devices such as Bluetooth® earphones or smart glasses may also be used. Each of the plurality of wireless power receiving apparatuses 200 includes a receiving end iron core plate 210 and a receiving end coil 220 and has a substantially thin rectangle. 2 is a schematic diagram of a preferred embodiment of the wireless charging device 100 of the present invention, and FIG. 3 is a schematic perspective view of FIG. The wireless charging device 100 includes a transmission end core 110 and a transmission end coil 120. The transmission end core 110 includes a bottom plate 111, and two standing plates 112 are connected to form a bowl shape. A charging space 113 is formed between the plurality of wireless power receivers 112, and a plurality of the wireless power receiving apparatuses 200 can be arranged in the charging space 113 and can be charged simultaneously. The present invention includes a plurality of embodiments in which the wireless power receivers 200 are arranged and mounted, which will be described later.

  The principle and method by which the wireless charging device 100 of the present invention can simultaneously charge a plurality of wireless power receiving devices 200 is shown in FIG. 2, and uses the saddle-shaped transmission terminal core 110 of the wireless charging device 100. The receiving end core plate 210 and the receiving end coil 220 are placed in the charging space 113 between the two standing plates 112, and the receiving end core plate 210 is perpendicular to the two standing plates 112. Become. Thus, when a current flows through the transmission end coil 120, an electromagnetic field is generated in the charging space 113, passes through the receiving end core plates 210 via the two standing plates 112, and is indicated by the broken-line arrows in FIG. The receiving end coil 220 can generate charging power by induction of the electromagnetic field. Therefore, when a plurality of wireless power receivers 200 are all arranged in the charging space 113 between the two upright plates 112, each receiving end core plate 210 and the transmission end core 110 are independently electromagnetic fields. As long as the circuit generates a circuit so that both can be charged at the same time and the wireless power receiver 200 is within the range between the two uprights 112, the distance from the bottom plate 111 will be no matter how far away. Can be charged.

  As shown in FIGS. 2 and 3, the wireless power receiver 200 is placed between two standing plates 112 and is perpendicular to the bottom plate 111, but in another embodiment of the present invention, the wireless power receiver 200. The receiving device 200 can stand upright between the standing plates 112, and of course, it can be placed flat (in parallel) with the bottom plate 111, or can be placed diagonally between the two standing plates 112 (not parallel or perpendicular to the bottom plate). The receiving end core plate 210 of the wireless power receiving apparatus 200 only needs to be perpendicular to the two standing plates 112 (not shown). In an embodiment of the present invention, the transmission end coil 120 (not shown) is wound as a set of concentric spiral planar coils and is located on either side of the bottom plate 111 and / or the two upright plates 112. It may be arranged on the surface. In the present invention, the arrangement of the transmission end coil 120 depends on how many wireless power receivers 200 can be wirelessly charged. According to experiments, the maximum number of wireless chargers 100 of the present invention is 50. Wireless charging can be simultaneously performed on the wireless power receiving apparatus 200.

  The present invention mounts a plurality of wireless power receiving apparatuses 200 and charges them simultaneously, and reduces the volume of the wireless charging apparatus 100 as much as possible. Please refer to FIG. FIG. 4 is a schematic perspective view of the first embodiment of the wireless charging device of the present invention. The wireless charging device 100 of the present invention further includes a charging base 300 made of a non-metallic material. It has a bowl shape with one end open, and includes a bottom portion 310 and two side wall portions 320. The charging space 113 is formed inside, and the bottom plate 111 and the two standing plates 112 of the transmission end core 110 are connected to the charging portion. The base 300 is disposed inside the bottom 310 and the two side walls 320, respectively.

  In this embodiment, a plurality of slide grooves 321 extending from the top toward the bottom 310 are provided on the inner surfaces of the two side wall portions 320, and the plurality of wireless power receiving apparatuses 200 slide on the side edges thereof. The wireless power receiving device 200 is inserted into the charging space 113 along the groove 321, and the wireless power receiving device 200 stands upright in the charging space 113, and the wireless power receiving device 200 has two vertical ends of the transmission end core 110. It becomes perpendicular to the plate 112. Since the known smartphone is rectangular and thin and has a long side 211 and a short side 212, in this embodiment, the long side 211 is perpendicular to the bottom plate 111 of the transmission end core 110, and the short side 212 is the transmission end core 110. In other words, the short side 212 faces downward and is inserted into the charging base 300.

  Please refer to FIG. 5 and FIG. 2 together. FIG. 5 is a schematic perspective view of a second embodiment of the wireless charging device of the present invention, and FIG. 2 is a schematic side sectional view of FIG. In this embodiment, the charging base 300 has a bowl shape with three ends open, and a plurality of parallel low plates 311 are provided on the inner surface of the bottom 310 of the charging base 300, and a plurality of mounting grooves 312 are provided. When the plurality of wireless power receiving devices 200 are placed in the charging space 113, one side edge of the wireless power receiving device 200 enters the mounting groove 312 to form the wireless power The receiving device 200 can be arranged to stand upright in the charging base 300, and the wireless power receiving device 200 is perpendicular to the two standing plates 112 (not shown) of the transmission end core 110. In this embodiment, the short side 212 is perpendicular to the bottom plate 111 of the transmission end core 110, and the long side 211 is parallel to the bottom plate 111 of the transmission end core 110. In other words, the long side 211 faces downward. It is inserted into the charging base 300.

  Please refer to FIG. 6 and FIG. FIG. 6 is a schematic perspective view of a third embodiment of the wireless charging device of the present invention, and FIG. 2 can be a schematic side sectional view of FIG. In this embodiment, the charging base 300 has a box shape with one side open, and a bottom plate 111 (broken line) of the transmission end core 110 is provided on the side opposite to the opening, and the two upright plates 112 are provided. (Broken lines) are provided in the two side wall portions 320. In the present embodiment, a plurality of parallel partition plates 322 are provided inside the two side wall portions 320, and a plurality of receiving grooves 323 are formed. Yes. A wireless power receiver 200 can be placed in each housing groove 323, and the plurality of wireless power receivers 200 are arranged in the charging space 113 so as to be parallel to the bottom plate 111.

  Please refer to FIG. FIG. 7 is a schematic perspective view of a fourth embodiment of the wireless charging apparatus of the present invention. In this embodiment, the charging base 300 has a box shape with one side open, and the bottom plate 111 of the transmission end core 110 is provided on the bottom 310 of the charging base 300. The two standing plates 112 are provided on the two side wall portions 320. In this embodiment, a plurality of parallel inclined shielding plates 324 are provided on the inner surfaces of the two side wall portions 320, and extend downwardly from the opening on the side toward the opposite side. A plurality of inclined slots 325 are formed, and when the plurality of wireless power receiving apparatuses 200 are placed in the charging space 113, the charging spaces 113 are inclined in a direction that is not parallel or perpendicular to the bottom plate 111. Although arranged, the receiving end core plates 210 of the plurality of wireless power receiving apparatuses 200 are also perpendicular to the two standing plates 112.

  Please refer to FIG. FIG. 8 is a schematic diagram of another preferred embodiment of the wireless charging device of the present invention. In the present embodiment, the wireless charging device 400 includes a plurality of transmission end cores, and the plurality of transmission end cores include at least one inner layer transmission end core 410 and one outer layer transmission end core 420, and each inner layer transmission end core. 410 and the outer layer transmission end core 420 are each provided with bottom plates 411 and 421 and two standing plates 412 and 422, and the inner layer transmission end core 410 is disposed so as to overlap the charging space 113 of the outer layer transmission end core 420. In the embodiment of FIG. 8, two layers of transmission end cores are arranged one on top of the other, and the bottom plate 411 and the two standing plates 412 of the inner layer transmission end core 410 are both the bottom plate 421 and the two standing plates of the outer layer transmission end core 420. Parallel to 422. However, in another embodiment, the bottom plate and the two standing plates of the inner transmission end core may not be parallel to the bottom plate and the two standing plates of the outer transmission end core, and The number and the way of overlapping the transmission end cores of the inner layer and the outer layer are not limited to the embodiments given as examples in the present invention.

  In the embodiment of FIG. 8, the two standing plates 412 of the inner layer transmission end core 410 are shorter than the two standing plates 422 of the outer layer transmission end core 420, and the upper ends of the two standing plates 422 of the outer layer transmission end core 420 are The two standing plates 422 of the outer layer transmission end core 420 can be brought close to the plurality of wireless power receiving apparatuses 200 by bending inwardly into an L shape. In the present embodiment, the wireless charging device 400 includes a plurality of transmission end coils 430, and each transmission end coil 430 corresponds to the transmission end cores 410 and 420. The embodiment of FIG. 8 of the present invention can be used in combination with the charging base of FIGS. 4-7 described above, but will not be described in further detail here.

  See FIG. FIG. 9 is a schematic view of still another preferred embodiment of the wireless charging device of the present invention. In the present embodiment, the wireless charging device 500 includes a transmission end core 510 and a first transmission end coil 520, and the transmission end core 510 includes a bottom plate 511 and at least one standing plate 512 surrounding a side edge of the bottom plate 511. Thus, the transmission end core 510 has a cylindrical shape with one end opened, and a charging space 113 is formed therein. In the embodiment shown in FIG. 9, the standing plate 512 has a single rectangular tube shape, but in another embodiment (not shown), the transmission end iron core has a circular tube shape and an elliptical shape with one open end. It may be a cylindrical shape or other polygonal cylindrical shape.

  In the present embodiment, since the first transmission end coil 520 surrounds the inner surface of the upright plate 512, when a current flows through the first transmission end coil 520, the charging space 113 in the upright plate 512. When the plurality of wireless power receivers 200 are placed in the charging space 113, each receiving end coil generates charging power by induction of the electromagnetic field. In the present embodiment, the plurality of wireless power receivers 200 can be arbitrarily placed in the charging space 113 regardless of the type, so that the wireless power receiver 200 is connected to the first transmission end coil 520. As long as it is within the charging space surrounded by the transmission end core 510, the wireless power receiving apparatus 200 can generate charging power by induction of an electromagnetic field.

  In this embodiment, the wireless charging device 500 further includes a second transmission end coil 530 disposed on the bottom plate 511, and the second transmission end coil 530 is wound as a set of concentric spiral planar coils. Since it is disposed on the inner surface of the bottom plate 511, when a current flows through the second transmission end coil 530, an electromagnetic field can be generated in the charging space 113, thereby generating an electromagnetic field generated by the first transmission end coil 520. In combination, the energy of the electromagnetic field in the charging space 113 can be enhanced, and when the plurality of wireless power receivers 200 are placed in the charging space 113, the plurality of receiving end coils similarly enhance the energy. The charging power is generated by the induction of the electromagnetic field, and the charging speed of the plurality of wireless power receiving apparatuses 200 can be increased.

  Please refer to FIG. This is a schematic view of yet another preferred embodiment in which the wireless charging device of FIG. 9 is inverted. The bottom plate 511 of the transmission end core 510 is a rectangular iron core plate, and the first transmission end coil 520 is similarly wound on the inner surface of the upright plate 512, and the second transmission end coil 530 is the bottom plate. The outer surface of 511 is surrounded, and the bottom plate 511 and the upright plate 512 of the transmission end core 510 are both wound with a coil, so that the energy of the electromagnetic field in the charging space 113 can be enhanced.

  9 and 10, the wireless charging device 500 can be disposed in a charging base (not shown), the charging base is made of a non-metallic material and conforms to the shape of the transmission end core 510. The charging base can be a rectangular cylinder having one end opened, a circular cylinder, an oval cylinder, a polygonal cylinder, or the like, and the bottom plate 511 of the transmission end iron core 510 is the bottom of the charging base. The standing plate 512 of the transmission end core 510 is disposed on the side wall portion of the charging base. Similarly, in the charging space of the charging base, a plurality of slide grooves 321 are provided as shown in FIG. 4, a plurality of parallel low plates 311 are provided as shown in FIG. 5, or FIGS. As described above, a plurality of partition plates 322 or inclined shielding plates 324 are provided, and the plurality of wireless power receivers 200 can be arranged in the charging base in an orderly manner such as horizontally, vertically, horizontally or diagonally.

  In summary, the wireless charging device and the charging method provided by the present invention can perform wireless charging simultaneously on a plurality of wireless power receiving devices and can greatly reduce the space occupied by the wireless charging device. Since the wireless charging device has many functions and advantages that could not be achieved, the present invention is quite different from the known design and can increase the overall value of use, and the application has been published in previous publications. Is not disclosed, is not used, and is in compliance with the requirements of the patent, so hereby apply for a patent under the law.

DESCRIPTION OF SYMBOLS 100 Wireless charging device 110 Transmission end core 111 Bottom plate 112 Standing plate 113 Charging space 200 Wireless power receiver 210 Reception end core plate 211 Long side 212 Short side 220 Reception end coil 300 Charging base 310 Bottom 311 Low plate 312 Mounting groove 320 Side wall 321 Slide groove 322 Partition plate 323 Housing groove 324 Inclined shielding plate 325 Slot 400 Wireless charging device 410 Inner layer transmission end core 411 Bottom plate 412 Standing plate 420 Outer layer transmission end core 421 Bottom plate 422 Standing plate 430 Transmission end coil 500 Wireless charging device 510 Transmission end Iron core 511 Bottom plate 512 Standing plate 520 First transmission end coil 530 Second transmission end coil

Claims (10)

A wireless charging device that sends current for charging using an electromagnetic field,
A first transmission end coil that surrounds the charging space; and an iron stand plate that is disposed around the first transmission end coil and surrounds the charging space so as to enhance the energy of the electromagnetic field of the charging space. A transmission end;
A wireless power receiving device having a receiving end coil and a receiving end core plate corresponding to the receiving end coil;
A wireless charging apparatus, wherein when a current for charging flows through the first transmission end coil, an electromagnetic field is generated in the charging space, and a current induced by the electromagnetic field is generated in the receiving end coil. The wireless charging device according to claim 1,
A plurality of the wireless power receivers, each of the wireless power receivers includes the receiving end coil and the receiving end core plate corresponding to the receiving end coil;
The plurality of wireless power receiving devices can be simultaneously placed in the charging space, and when a current for charging flows through the first transmission end coil, an electromagnetic field is generated in the charging space, and the electromagnetic field is generated. A wireless charging device in which a current induced by the electric current is generated in the receiving end coil. The wireless charging device according to claim 2,
A wireless charging apparatus further comprising a charging base made of a non-metallic material, the charging base having an opening at one end corresponding to the charging space, and the standing plate being disposed on a side wall portion of the charging base. The wireless charging device according to claim 3,
The charging base further includes a plurality of slide grooves for guiding a direction in which the wireless power receiving device is placed, corresponding to the plurality of wireless power receiving devices, and the slide groove is a non-metallic material. apparatus. The wireless charging device according to claim 4,
The charging base further includes a bottom portion that is non-parallel to the side wall portion, and the bottom portion and the side wall portion define the charging space. The wireless charging device according to claim 1,
The first transmission end coil is wound around a first direction as a central axis, the central axis of the first transmission end coil passes through the charging space, and the vertical plate is Wireless charging device having a closed structure surrounding the central axis of the transmission end coil. The wireless charging device according to claim 6,
The transmission end portion further includes a second transmission end coil having a second axis as a central axis, and the second transmission end coil has a shape extending along a surface, and the charging space The wireless charging device is disposed on one of the surfaces defining the first transmission end coil, and a central axis of the first transmission end coil passes through the second transmission end coil. The wireless charging device according to claim 7, wherein
The wireless charging device, wherein a central axis of the first transmission end coil and a central axis of the second transmission end coil are parallel to each other. The wireless charging device according to claim 7, wherein
The transmission end portion is a wireless charging apparatus further including an iron core bottom plate corresponding to the second transmission end coil. The wireless charging device according to claim 9, wherein
The second transmission end coil is a wireless charging device located closer to the charging space than the bottom plate.