TWM507106U - Wireless charging device and system capable of suppressing divergence of electromagnetic wave and enhancing charging efficacy - Google Patents

Abstract

A wireless charging device capable of transmitting an electromagnetic wave with at least one frequency to charge at least one powered device wirelessly is disclosed. The wireless charging device includes a casing, at least one thin-film transmitter coil assembly and a shielding device. The casing includes a main body having an opening and a receiving space for accommodating the powered device. Thin-film transmitter coil assembly is disposed in the main body and transmits an electromagnetic wave with at least one frequency. Thin-film transmitter coil assembly includes at least one antenna for receiving AC signal so as to transmit the electromagnetic wave. The shielding device is attached on an outer surface of the main body or disposed in the main body to cover at least portion of the antenna of the thin-film transmitter coil assembly, so that the divergence of the electromagnetic wave is suppressed, the energy of the electromagnetic wave can be concentrated to the interior of the casing, and the charging efficacy can be enhanced.

Description

Wireless charging device and system capable of suppressing electromagnetic wave divergence and improving charging performance 【0001】

The present invention relates to a charging device and system, and more particularly to a wireless charging device and a wireless charging system capable of suppressing electromagnetic wave divergence and concentrating electromagnetic waves to non-contact charging one or more power receiving devices.

【0002】

Various portable electronic devices, such as mobile phones and tablet computers, have been widely used in daily life. In order to provide the power required for the operation of the portable electronic device, the internal battery of the charger must be charged by the charger. Since the wireless charging device can be applied to various use environments and is not limited by the power cord, it is convenient for the user to perform charging applications, and thus the wireless charging device has been gradually developed to replace the use of the wired charger.

[0003]

Wireless charging, also known as inductive charging or non-contact charging, provides energy from a power supply device to a powered device by wireless means. At present, the wireless charging technology is generally divided into three camps, the Wireless Power Consortium (WPC), the Power Matters Alliance (PMA), and the Wireless Power Alliance A4WP (Alliance For Wireless Power), among which WPC, The A4WP alliance is the mainstream, and the wireless charging method uses magnetic induction (low frequency) and magnetic resonance (high frequency) technologies. The magnetic induction mode can only be used for short-distance transmission and the power-receiving device needs to be attached to the power supply device. The power conversion efficiency is high, but it is difficult to realize charging of multiple power-receiving devices at the same time. Magnetic resonance is to let the transmitting end and the receiving end reach a certain resonance frequency, which allows both sides to form a magnetic resonance phenomenon and achieve the purpose of energy transmission through electromagnetic waves. Compared with the magnetic induction method, the magnetic resonance method can realize charging over a long distance.

[0004]

Fig. 1 is a diagram showing a conventional wireless charging device for wirelessly charging a power receiving device. As shown in FIG. 1, the wireless charging device 11 wirelessly transmits energy to the power receiving device 12. Generally, the coil component of the wireless charging device 11 usually uses a multi-core copper wire coil and the copper wire coil is placed on the hard iron. The oxy-magnetic oxide substrate is mounted in the plate-shaped casing, and the power receiving device 12 can be charged only outside one of the wireless charging devices 11. However, the electromagnetic wave emitted by the coil component of the conventional wireless charging device 11 is diverged to the periphery, which may cause the user to be injured by electromagnetic waves, and the charging efficiency of the wireless charging device 11 cannot be effectively improved. In addition, the wireless charging device 11 can only charge the power receiving device 12 within a certain distance range of the side. To prevent the power receiving device 12 from being placed in a distance and range that cannot be effectively charged, the wireless charging device 11 needs to increase the sensing device to remind the user. Alternatively, the power receiving device 12 can be positioned by the positioning mechanism, which increases the manufacturing cost of the wireless charging device 11, and the user cannot arbitrarily place the power receiving device 12 to ensure the wireless charging progress, which also reduces the convenience of use.

[0005]

In addition, due to the different technologies used in the existing wireless charging devices, the coupling frequency of the coil components and the circuit design of the transmitting end are also different, resulting in incompatibility of the respective specifications of the products and incapability of sharing the components. Due to the incompatibility factor, the wireless charging device cannot use the same coil component and circuit component, so that various portable electronic devices need to use various customized wireless charging devices, which reduces the advantages and versatility of the wireless charging device. And it is not possible to wirelessly charge a plurality of power receiving devices using different wireless charging technologies with a single wireless charging device.

[0006]

The purpose of the present invention is to provide a wireless charging device capable of suppressing electromagnetic wave divergence to reduce electromagnetic wave damage to a user, and concentrating electromagnetic waves to a charging area for non-contact charging of one or more power receiving devices, and enhancing electromagnetic wave amount. To improve charging performance.

【0007】

Another object of the present invention is to provide a wireless charging device capable of transmitting electromagnetic waves of more than one different frequency, which has an accommodating space for one or more power receiving devices capable of receiving electromagnetic waves of the same frequency or different frequencies, and can ensure the The one or more power receiving devices can wirelessly charge simultaneously or time-divisionally and effectively in the accommodating space, and the structure is simple, the cost can be reduced, and the versatility and convenience of use can be increased.

[0008]

Another object of the present invention is to provide a wireless charging system including the foregoing wireless charging device and one or more power receiving devices, which can adaptively or selectively switch wireless charging using magnetic resonance coupling or magnetic induction, and can achieve the foregoing efficacy.

【0009】

In order to achieve the above object, a preferred embodiment of the present invention provides a wireless charging device for wirelessly charging one or more power receiving devices, the wireless charging device including a housing, at least one set of transmitting thin film coil components, and a Shielding components. The housing includes a body having an accommodating space and an opening, and the accommodating space receives one or a plurality of power receiving devices. At least one set of transmitting thin film coil components are disposed in the body and are configured to emit electromagnetic waves of a specific frequency or a plurality of different frequencies, wherein each of the set of transmitting thin film coil components includes at least one antenna to receive an alternating current signal, and the electromagnetic wave is emitted. The shielding component is attached to the outer surface of the body, or is disposed in the body and at least partially covers the antenna of the transmitting film coil component to be configured to block the electromagnetic wave from diverging outward.

[0010]

In order to achieve the above object, another preferred embodiment of the present invention provides a wireless charging system including a wireless charging device and at least one power receiving device. The wireless charging device includes a housing, at least one set of transmitting film coil elements, and a shielding element. The housing includes a body having an accommodation space and an opening. At least one set of transmitting thin film coil components is disposed in the body and is configured to emit electromagnetic waves of a specific frequency or a plurality of different frequencies, wherein each of the set of transmitting thin film coil components includes at least one antenna to receive an alternating current signal, and the electromagnetic wave is emitted. The shielding component is attached to the outer surface of the body or disposed in the body and at least partially covers the antenna of the transmitting film coil component to be configured to block the electromagnetic wave from diverging outward. The at least one power receiving device is received in the housing space of the housing, and includes a receiving film coil component coupled to the transmitting film coil component of the wireless charging device to receive the energy transmitted by the wireless charging device.

[0035]

11‧‧‧Wireless charging system
12‧‧‧Power-receiving device
2‧‧‧Wireless charging system
3, 3a, 3b, 3c, 3d‧‧‧ wireless charging device
4, 4'‧‧‧Power-receiving devices
5‧‧‧Power supply
30‧‧‧Shell
31, 31a, 31b‧‧‧ emitting film coil components
32‧‧‧Transmission module
33‧‧‧ Controller
34‧‧‧Shielding components
35‧‧‧Protective layer
36‧‧‧First switching circuit
37‧‧‧Second switching circuit
301‧‧‧ Ontology
302‧‧‧ cover
303‧‧‧ accommodating space
304‧‧‧ openings
305‧‧‧ side wall
306‧‧‧ bottom wall
311‧‧‧Flexible substrate
311a‧‧‧ first side
311b‧‧‧ second side
312‧‧‧ oscillating antenna
313‧‧‧Resonant antenna
313a‧‧‧ first end
313b‧‧‧ second end
316‧‧‧ capacitor
321‧‧‧Power conversion circuit
322‧‧‧Oscillator
323‧‧‧Power Amplifier
324‧‧‧Filter circuit
341‧‧‧First Screening Department
342‧‧‧Second shield
343‧‧‧ Grid unit
344, 345‧‧‧Metal microwire
4a, 4a'‧‧‧ Wireless Charging Receiver
4b, 4b'‧‧‧ load
41, 41'‧‧‧ Receiving film coil components
42, 42'‧‧‧ receiving module
43‧‧‧Connector
421‧‧‧Filter circuit
422‧‧‧Rectifier circuit
423‧‧‧ Voltage regulator circuit
424‧‧‧DC amplifier circuit
C ₁₁ , C ₁₂ ‧ ‧ first capacitor
C ₂₁ , C ₂₂ ‧ ‧ second capacitor
S ₁₁ , S ₁₂ ‧‧‧ first switching element
S ₂₁ , S ₂₂ ‧‧‧ second switching element
L‧‧‧ central axis
AA‧‧‧ section
B‧‧‧ Radial
D‧‧‧ spacing

[0011]

Fig. 1 is a diagram showing a conventional wireless charging device for wirelessly charging a power receiving device.
Figure 2A is a schematic diagram of the architecture of the wireless charging system of the present invention.
FIG. 2B is a schematic structural diagram of another variation of the wireless charging system of the present invention.
FIG. 3 is a schematic structural view of a first embodiment of the wireless charging device of the present invention.
Fig. 4A is a cross-sectional view of the wireless charging device shown in Fig. 3 taken along the line AA thereof.
Fig. 4B is a view showing the relationship between the transmitting film coil component of Fig. 4A and the shield member.
Fig. 5A is a cross-sectional view showing another variation of the wireless charging device of the present invention on the side wall thereof.
Fig. 5B is a view showing the relationship between the transmitting film coil element and the shielding member of Fig. 5A.
Fig. 6A is a cross-sectional view showing another variation of the wireless charging device of the present invention on the side wall thereof.
Fig. 6B is a view showing the relationship between the transmitting film coil component of Fig. 6A and the shield member.
Fig. 7 is a schematic structural view showing an example of a shield member shown in Fig. 3.
Fig. 8 is a circuit block diagram of a transmitting module of the wireless charging device shown in Fig. 3.
Fig. 9 is a circuit block diagram of a receiving module of the power receiving device shown in Fig. 2.
Fig. 10 is a view showing the structure of an example of the power receiving apparatus of Fig. 2.
Figure 11 is a block diagram showing a circuit of a variation of the wireless charging system of the present invention.
Figure 12 is a schematic structural view of a second embodiment of the wireless charging device of the present invention.
Figure 13 is a schematic structural view of a third embodiment of the wireless charging device of the present invention.
Figure 14 is a schematic structural view of a fourth embodiment of the wireless charging device of the present invention.
Figure 15 is a schematic structural view of a fifth embodiment of the wireless charging device of the present invention.

[0012]

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and drawings are intended to be illustrative and not limiting.

[0013]

2A is a schematic structural diagram of a wireless charging system of the present invention, FIG. 2B is a schematic structural diagram of another variation of the wireless charging system of the present invention, and FIG. 3 is a schematic structural view of the wireless charging device of the present invention, and FIG. 4A is a third The figure shows a cross-sectional view of the wireless charging device in its AA cross section, Fig. 4B shows the relationship between the transmitting film coil component and the shielding component of Fig. 4A, and Fig. 7 shows the structure of an exemplary one of the shielding component shown in Fig. 3. The schematic diagram, and FIG. 8 is a circuit block diagram of the transmitting module of the wireless charging device shown in FIG. As shown in Figures 2A, 2B, 3, 4A, 4B, 7 and 8, the wireless charging system 2 of the present invention includes a wireless charging device 3 and at least one power receiving device 4, wherein the wireless charging device 3 is connected to a power source 5 (e.g. However, it is not limited to AC mains, or external or built-in battery cells, and can emit electromagnetic waves of a specific (single) frequency or broadband (multiple different frequencies) (such as, but not limited to, electromagnetic waves with a frequency range of 60 Hz to 300 GHz). To wirelessly charge one or more power receiving devices 4 (such as, but not limited to, mobile phones, tablets, and electrical appliances) that receive electromagnetic waves of the same or different frequencies using magnetic resonance (high frequency) or magnetic induction (low frequency).

[0014]

The wireless charging device 3 of the present invention comprises a housing 30, at least one set of transmitting film coil elements 31, at least one set of transmitting modules 32 and a shielding member 34, wherein the housing 30 comprises a body 301 and a cover 302. The body 301 has an accommodating space 303 , an opening 304 , a sidewall 305 , and a bottom wall 306 . The cover 302 is configured to cover the opening 304 of the body 301 . The accommodating space 303 of the body 301 is configured as a charging area, and can accommodate one or a plurality of power receiving devices 4 for wireless charging. Each of the transmitting film coil components 31 is disposed in the sidewall 305 of the body 301 or disposed in the sidewall 305 and the bottom wall 306, and is electrically connected to the corresponding transmitting module 32. The transmitting thin film coil component 31 is wirelessly charged. The transmitting end of device 3. The transmitting module 32 is electrically connected between the power source 5 and the corresponding transmitting film coil component 31 to receive the power provided by the power source 5 and generate an alternating current signal to the corresponding transmitting film coil component 31. In some embodiments, the shielding device 34 is at least partially attached to the outer surface of the sidewall 305 of the body 301 or attached to the outer surface of the sidewall 305 and the bottom wall 306, and at least partially encapsulates the transmitting film coil component 31. Thereby, the electromagnetic wave blocking the transmitting film coil component 31 is diverged outwardly, and the electromagnetic wave can be concentrated toward the accommodating space 303 of the body 301 to wirelessly receive one or a plurality of power receiving devices 4 accommodated in the accommodating space 303. Charging. In some embodiments, the wireless charging device 3 further includes a protective layer 35 that is at least partially attached to the outer surface of the shielding member 34 to protect the shielding member 34. In some embodiments, the protective layer 35 may be composed of a protective coating, which may be selected from the group consisting of epoxy resin, acrylic silicone rubber, polyurethane rubber, ethylene-vinyl acetate copolymer rubber, polyamide rubber, rubber rubber. , polyolefin adhesive, moisture-curing polyurethane adhesive or silicone rubber, and not limited to this.

[0015]

In some embodiments, as shown in FIG. 2A, the wireless charging device 3 includes a set of transmitting film coil elements 31 and a set of transmitting modules 32, whereby the wireless charging device 3 can emit electromagnetic waves of a specific frequency to the power receiving device. 4 Wireless charging. In other embodiments, as shown in FIG. 2B, the wireless charging device 3 includes a complex array of transmitting film coil elements 31 and a complex array of transmitting modules 32, wherein each group of transmitting thin film coil elements 31 is electrically connected to a corresponding one. The transmitting module 32, whereby the wireless charging device 3 can emit electromagnetic waves of a specific frequency or a plurality of different frequencies to wirelessly charge one or more power receiving devices 4 that can receive electromagnetic waves of the same frequency or different frequencies simultaneously or time-divisionally.

[0016]

In some embodiments, each set of the transmitting film coil component 31 is flexible and includes a flexible substrate 311, a oscillating antenna 312, and a resonant antenna 313, wherein the oscillating antenna 312 and the resonant antenna 313 are disposed on the flexible substrate 311. In the opposite direction, in detail, the flexible substrate 311 has a first surface 311a and a second surface 311b. The first surface 311a is opposite to the second surface 311b, and the oscillating antenna 312 and the resonant antenna 313 are respectively disposed on the flexible substrate 311. One side 311a and the second side 311b. The two ends of the resonant antenna 313 (ie, the first end 313a and the second end 313b) are connected to one or more capacitors 316, and the two ends of the oscillating antenna 312 are connected to the transmitting module 32. When the wireless charging device 3 passes an AC signal to the oscillating antenna 312 of the transmitting film coil component 31 via its transmitting module 32, the oscillating antenna 312 is coupled to the resonant antenna 313, and the electromagnetic wave and the received power are transmitted at a specific frequency. The receiving film coil component 41 of the wireless charging receiver 4a of the device 4 is coupled, and the power is outputted to the load 4b via the receiving module 42 to wirelessly charge the power receiving device 4.

[0017]

In this embodiment, the wireless charging device 3 sequentially includes the resonant antenna 313, the flexible substrate 311, and the central axis L of the body 301 along the radial direction thereof to the outer surface of the sidewall 305 (as indicated by the reference B). The antenna 312, the shielding element 34, and the protective layer 35 are activated. In other words, the transmitting film coil component 31 is disposed in the sidewall 305, and the resonant antenna 313 is adjacent to the accommodating space 303. The flexible substrate 311 is located between the resonant antenna 313 and the oscillating antenna 312, and the oscillating antenna 312 is adjacent to the sidewall. The outer surface of 305 is between the resonant antenna 313 and the shield element 34. The shielding member 34 is attached to the outer surface of the side wall 305 and at least partially covers the resonant antenna 313 of the transmitting film coil element 31 and the oscillating antenna 312. In the present embodiment, as shown in FIG. 7, the shielding member 34 is a metal mesh film, which is suitable for blocking electromagnetic waves of higher frequencies to diverge outward, for example, blocking the first specific frequency or more (for example, The electromagnetic wave of 6 MHz or more is diverging outward. The metal mesh film is made of a metal or metal composite material, wherein the metal or metal composite material is selected from the group consisting of copper, gold, silver, aluminum, tungsten, chromium, titanium, indium, tin, nickel, iron or at least two thereof. The metal compound composed of the above is not limited thereto. The metal mesh film has a mesh pattern including a plurality of mesh cells 343, wherein two adjacent but non-contiguous metal micro wires 344, 345 of each mesh cell 343 have a pitch d, the pitch d is smaller than the wavelength of the electromagnetic wave emitted from the transmitting film coil unit 31. In other embodiments, the shielding element 34 is a magnetically permeable film made of a soft magnetic material such as, but not limited to, ferrite, zinc-nickel ferrite (NiZn), zinc ferromanganese. The oxygen (MgZn) or the iron-bismuth aluminum alloy is formed of a bonding material, and is suitable for blocking the electromagnetic wave of a lower frequency to diverge outward, for example, blocking between the first specific frequency and the second specific frequency (for example, between 60 Hz and 20 MHz) The electromagnetic waves between the two are diverging outward. In other embodiments, the shielding element 34 is a composite film that bonds the metal mesh film to the magnetically permeable film to block electromagnetic waves that diverge outward in all frequency ranges (eg, between 60 Hz and 300 GHz).

[0018]

In some embodiments, the shielding member 34 includes a first shielding portion 341 and a second shielding portion 342, wherein the first shielding portion 341 is attached to the outer surface of the body 301 and covers the transmitting film coil element 31, and the second shielding portion 342 Attached to the outer surface of the cover 302 to block electromagnetic waves from escaping outward from the cover 302.

[0019]

In some embodiments, the first surface 311a and the second surface 311b of the flexible substrate 311 respectively include a bonding layer (not shown), and the oscillating antenna 312 and the resonant antenna 313 are respectively conductive materials and have a bonding layer thereof. The first surface 311a and the second surface 311b of the flexible substrate 311 are disposed. The bonding layer may be a light curing, thermal curing or other bonding material having curing characteristics, and other bonding materials having curing characteristics may be, but not limited to, an ethylene-vinyl acetate copolymer system. Glue, polyamide adhesive, rubber adhesive, polyolefin adhesive or moisture hardened polyurethane adhesive. In some embodiments, the bonding layer may be mixed with a magnetic material in addition to the above-mentioned cured bonding material, wherein the magnetic material may be, for example, but not limited to, ferromagnetic particles mixed in the cured bonding material. In other embodiments, the flexible substrate 311 can be replaced by the aforementioned bonding layer.

[0020]

In some embodiments, the material of the flexible substrate 311 may be selected from the group consisting of polyethylene terephthalate (PET), thin glass, polyethylene naphthalate (PEN), and polyether (Polyethersulfone). , PES), polymethylmethacrylat (PMMA), polyimide (Polyimide, PI) or polycarbonate (Polycarbonate, PC), and not limited thereto. In some embodiments, the oscillating antenna 312 and the resonant antenna 313 can be, but are not limited to, a single loop or a multi-loop antenna, and the shape of the loop includes, but is not limited to, a circle, an ellipse, or a rectangle. The oscillating antenna 312 and the resonant antenna 313 are respectively made of a conductive material, wherein the conductive material may be selected from silver (Ag), copper (Cu), gold (Au), aluminum (Al), tin (Sn) or graphene. And not limited to this.

[0021]

Fig. 5A is a cross-sectional view showing another modification of the wireless charging device of the present invention on the side wall thereof, and Fig. 5B is a view showing the relationship between the transmitting film coil member and the shielding member of Fig. 5A. In some embodiments, as shown in FIGS. 5A and 5B, the transmitting film coil component 31 further includes a first protective layer 314 and a second protective layer in addition to the flexible substrate 311, the oscillating antenna 312, and the resonant antenna 313. 315, wherein the first protection layer 314 and the second protection layer 315 respectively cover the oscillating antenna 312 and the resonant antenna 313, that is, the first protection layer 314 and the second protection layer 315 are respectively located in the oscillating antenna 312 and the resonant antenna 313. Outside. In this embodiment, the shielding member 35 can be disposed in the body 30 and located in the sidewall 305 and between the oscillating antenna 312 of the transmitting film coil component 31 and the first protective layer 314. Alternatively, as shown in FIGS. 6A and 6B, the shielding member 35 may also be disposed in the body 30 and located in the sidewall 305 and on the outer side of the first protective layer 314 of the transmitting film coil component 31. In this embodiment, the materials of the first protective layer 314 and the second protective layer 315 may be the same as the foregoing protective layer 35, and details are not described herein again.

[0022]

In some embodiments, the wireless charging device 3 includes one or more sets of transmitting modules 32, wherein each set of transmitting modules 32 is electrically connected to the corresponding transmitting film coil component 31, and includes a power conversion circuit 321, and oscillates. The device 322, the power amplifier 323 and the filter circuit 324. The power conversion circuit 321 is electrically connected to the power source 5 and is connected to the oscillator 322 and the power amplifier 323. The power conversion circuit 321 converts and supplies power supplied from the power source 5 to the oscillator 322 and the power amplifier 323. In some embodiments, the power conversion circuit 321 includes a DC-DC converter, an AC-AC converter, and/or a DC-AC converter. The oscillator 322 is variably outputting an AC signal of a specific frequency, the power amplifier 323 is configured to amplify the AC signal of the specific frequency, and the filter circuit 324 is configured to filter the harmonics of the AC signal and the unnecessary frequency portion. Thereby, it is output to the oscillating antenna 312 of the corresponding transmitting film coil element 31.

[0023]

In the present embodiment, each of the power receiving devices 4 includes a wireless charging receiver 4a and a load 4b, wherein the wireless charging receiver 4a and the load 4b can be two structurally separable devices or can be integrated into a single device. For example, the wireless charging receiver 4a of the power receiving device 4 can be a wireless charging receiving pad, and the load 4b can be a mobile phone without a wireless charging function. By electrically connecting the wireless charging receiving pad to the mobile phone, the wireless charging receiving pad can be wirelessly connected. The charging function of the phone can achieve wireless charging. In another embodiment, the wireless charging receiver 4a can also be integrated into the interior of the housing of the load 4b (eg, a mobile phone).

[0024]

Referring again to FIGS. 2A, 2B, 3, 4A, and 4B, in some embodiments, the wireless charging receiver 4a of each power receiving device 4 includes a receiving film coil component 41 and a receiving module 42 in which the receiving film coil component 41 is received. The invention comprises a flexible substrate, a oscillating antenna and a resonant antenna, wherein one end of the resonant antenna is connected to one or more capacitors. The structure, material and function of the flexible substrate, the oscillating antenna and the resonant antenna of the receiving film coil component 41 and the flexible substrate 311, the oscillating antenna 312 and the resonant antenna 313 of the transmitting film coil component 31 shown in FIGS. 4A and 4B, respectively. The structure, materials and functions are the same and will not be described here. In other embodiments, the receiving film coil component 41 further includes a first protective layer and a second protective layer, in addition to the flexible substrate, the oscillating antenna and the resonant antenna, wherein the structure of the receiving film coil component 41 is The structure and material of the material of the emissive film coil member 31 shown in Figs. 5A and 5B or Figs. 6A and 6B are similar, and will not be described herein. In the present embodiment, the receiving film coil component 41 is coupled to the transmitting film coil component 31, thereby receiving the energy transmitted by the transmitting film coil component 31 of the wireless charging device 3 by means of magnetic resonance or magnetic induction. In other words, when the power receiving device 4 is placed in the accommodating space 303 of the wireless charging device 3, the transmitting film coil component 31 of the wireless charging device 3 emits a higher frequency electromagnetic wave (for example, but not limited to 6.78 MHz) and the receiving film coil of the power receiving device 4 When the element 41 is the same frequency and receives the electromagnetic wave, the energy can be transmitted from the transmitting film coil element 31 of the wireless charging device 3 to the receiving film coil element 41 of the wireless charging receiver 4a by the magnetic resonance method. In other embodiments, when the power receiving device 4 is placed in the accommodating space 303 of the wireless charging device 3, the transmitting film coil component 31 of the wireless charging device 3 emits electromagnetic waves of a lower frequency (such as, but not limited to, 100 KHz) and the power receiving device 4 When the receiving film coil element 41 receives the electromagnetic wave, energy can be transmitted from the transmitting film coil element 31 of the wireless charging device 3 to the receiving film coil element 41 of the wireless charging receiver 4a by magnetic induction. Since the shielding element 34 can block the electromagnetic waves emitted from the transmitting film coil element 31 from being diverged outward, the electromagnetic wave energy can be concentrated to the accommodating space 303, thereby improving the charging efficiency.

[0025]

Fig. 9 is a circuit block diagram of a receiving module of the power receiving device shown in Fig. 2. In some embodiments, as shown in FIGS. 2A, 2B, and 9 , the wireless charging receiver 4a includes one or more sets of receiving modules 42 , wherein each set of receiving modules 42 includes a filtering circuit 421 , a rectifying circuit 422 , The voltage stabilizing circuit 423 and the DC voltage adjusting circuit 424. The filter circuit 421 is electrically connected to the resonant antenna of the receiving thin film coil component 41, and filters out the harmonics of the alternating current signal output from the resonant antenna of the receiving thin film coil component 41. The rectifier circuit 422 is electrically connected to the filter circuit 421 and the voltage stabilization circuit 423 to be configured to convert the AC signal into a DC power source. The voltage stabilizing circuit 423 is electrically connected to the rectifying circuit 422 and the DC voltage adjusting circuit 424 to stabilize the DC power source at a rated voltage value. The DC voltage adjusting circuit 424 is electrically connected to the voltage stabilizing circuit 423 and the load 4b to voltage-adjust (for example, boost) the DC power source to a voltage required by the load 4b, and to supply power to the load 4b, for example, to charge a battery of the mobile phone. .

[0026]

Fig. 10 is a view showing the structure of an example of the power receiving apparatus of Fig. 2. As shown in Figures 2 and 10, the power receiving device 4 includes a wireless charging receiver 4a and a load 4b, wherein the wireless charging receiver 4a of the power receiving device 4 can be a wireless charging receiving pad, and the load 4b can be a mobile phone without wireless charging function. . When the connector 43 of the wireless charging receiver 4a (ie, the wireless charging receiving pad) is electrically connected to the corresponding connector of the load 4b (ie, the mobile phone), the receiving film coil component 41 and the receiving module 42 are received by the wireless charging receiver 4a. The energy transmitted by the transmitting film coil component 31 of the wireless charging device 3 can be received, so that the mobile phone without the wireless charging function can achieve wireless charging.

[0027]

Figure 11 is a block diagram showing a circuit of a variation of the wireless charging system of the present invention. In this embodiment, the wireless charging system 2 of the present invention includes a wireless charging device 3 and one or more power receiving devices 4, 4', wherein the wireless charging device 3 can be based on the wireless charging receivers 4a, 4a of the power receiving devices 4, 4' The specification and characteristics are adaptively or selectively switched using magnetic resonance or magnetic induction to wirelessly charge the loads 4b, 4b' of the power receiving devices 4, 4'. In this embodiment, the wireless charging device 3 comprises a thin film coil emitting element 31, transmission module 32, a controller 33, a first switching circuit 36, second switching circuit 37, a plurality of first capacitors C _11, C ₁₂ and a plurality of The second capacitors C ₂₁ , C ₂₂ , wherein the structures, functions and principles of the transmitting film coil component 31 and the transmitting module 32 are similar to those of the previous embodiment, and the receiving film coil components 41, 41 ′ and the receiving modules 42 , 42 ′ The structure, function and principle are the same as those of the previous embodiment, and details are not described herein again. A plurality of first capacitors C ₁₁ and C ₁₂ are respectively connected in parallel with a oscillating antenna (not shown) of the transmitting thin film coil element 31, and a plurality of first capacitors C ₁₁ and C ₁₂ are connected in parallel to each other to be connected and received. The receiving film coil elements 41, 41' of the devices 4, 4' are coupled. The plurality of second capacitors C ₂₁ and C ₂₂ are respectively connected in series with the output terminal of the transmitting module 32 and the oscillating antenna (not shown) of the transmitting film coil component 31, and the plurality of second capacitors C ₂₁ and C ₂₂ are connected to each other. Parallel connections are coupled to the transmit module 32 for filtering to improve charging quality. The first switching circuit 36 includes a plurality of first switching elements S ₁₁ , S ₁₂ , and each of the first switching elements S ₁₁ , S ₁₂ is connected in series with a corresponding first capacitor C ₁₁ , C ₁₂ . Second switching circuit 37 comprises a plurality of second switching elements S _21, S _22, each second switching element S _21, S ₂₂ line _21, connected to a corresponding one of the second capacitor C C ₂₂ in series, respectively. The controller 33 is electrically connected to the plurality of first switching elements S ₁₁ , S ₁₂ of the first switching circuit 36 and the plurality of second switching elements S ₂₁ , S _{22 of the} second switching circuit 37 , and according to the representative power receiving device 4 a sensing signal of the wireless charging technology used by the 4' wireless charging receivers 4a, 4a' to generate a control signal to control the plurality of first switching elements S ₁₁ , S _{12 of the} first switching circuit 36 and The switching between the on and off of the plurality of second switching elements S ₂₁ , S ₂₂ of the second switching circuit 37 enables the wireless charging device 3 to be based on the wireless charging receivers 4a, 4a' of the power receiving devices 4, 4' The loads 4b, 4b' of the power receiving devices 4, 4' are wirelessly charged by adaptive or selective switching of the specifications and characteristics using magnetic resonance or magnetic induction.

[0028]

In this embodiment, the operating frequency of the wireless charging device 3 and the power receiving device 4, 4' during operation can be calculated according to the following formula (1):
f _a =1/{2π(L _a C _a ) ^1/2 }= 1/{2π(L _b C _b ) ^1/2 }= f _b (1)
Where f _a and f _b are the operating frequencies of the wireless charging receivers 4a, 4a' of the wireless charging device 3 and the power receiving devices 4, 4', respectively, and C _a is the capacitance of the first capacitors C ₁₁ and C ₁₂ of the wireless charging device 3 The value, L _a is the inductance value on the oscillating antenna of the transmitting film coil component 31, C _b is the capacitance value of the third capacitor C ₃ , C _{3 '} of the power receiving device 4, 4', and L _b is the receiving film coil component 41. The inductance value of the 41's starting antenna. For example, the capacitance values of the first capacitors C ₁₁ and C ₁₂ of the wireless charging device 3 may be 0.5 μF and 0.1 nF, respectively, and the inductance L on the oscillating antenna of the transmitting film coil component 31 is 5 μH. When the capacitance value of the third capacitor C ₃ of the power receiving device 4 is 0.5 μF, and the inductance value L3 on the oscillating antenna of the receiving film coil component 41 is 5 μH, the controller 33 of the wireless charging device 3 issues a control signal to the first switching. The circuit 36 and the second switching circuit 37 turn on the first switching element S ₁₁ and the second switching element S ₂₁ , and turn off the first switching element S ₁₂ and the second switching element S ₂₂ , whereby the wireless charging device 3 can be switched The first capacitor C _{11 is selected} (the capacitance value is also 0.5 μF), and the inductance L on the oscillating antenna of the transmitting film coil component 31 is also 5 μH, so that the wireless charging device 3 and the wireless charging receiver 4a of the power receiving device 4 are The working frequency is 100KHz, so that the electromagnetic wave of the lower frequency can be wirelessly charged by the magnetic induction method. When the capacitance value of the third capacitor C _{3 '} of the power receiving device 4 ′ is 0.1 nF, and the inductance value L _{3 ′} on the oscillating antenna of the receiving film coil component 41 _′ is 5 μH, the controller 33 of the wireless charging device 3 issues control. Signaling to the first switching circuit 36 and the second switching circuit 37 to turn on the first switching element S ₁₂ and the second switching element S ₂₂ , and turn off the first switching element S ₁₁ and the second switching element S ₂₁ , thereby wirelessly The charging device 3 can switch between the first capacitor C ₁₂ (the capacitance value is also 0.1 nF), and the inductance L on the oscillating antenna 311 of the transmitting film coil component 31 is also 5 μh, so that the wireless charging device 3 and the power receiving device 4 ′ The operating frequency of the wireless charging receiver 4a' is 6.78 MHz, whereby the higher frequency electromagnetic waves can be wirelessly charged by the magnetic resonance method. It should be noted that the foregoing operating frequency is merely an example, and the technology of the present invention is not limited to the value of the aforementioned operating frequency.

[0029]

In the embodiment, the body 301 is a cylinder, and the cover 302 is rotatably pivoted to the body 301 to cover the opening 304 of the body 301. The complex array of transmitting film coil elements 31 is disposed within the sidewall 305 of the barrel. Of course, the body 301 of the wireless charging device 3 is not limited to the cylinder body, and may be changed to other geometric structures according to actual applications. Figure 12 is a block diagram showing the second embodiment of the wireless charging device of the present invention. As shown in FIG. 12, in this embodiment, the component structure and function of the wireless charging device 3a are the same as those of the wireless charging device 3 shown in the first embodiment, and the same component numbers represent the same component structure and function. The main body 301 of the wireless charging device 3a of the present embodiment is a box, and the multi-array transmitting film coil element 31 is disposed in the side wall 305 of the casing.

[0030]

Figure 13 is a block diagram showing the structure of a third embodiment of the wireless charging device of the present invention. As shown in FIG. 13, in this embodiment, the component structure and function of the wireless charging device 3b are the same as those of the wireless charging device 3 shown in the first embodiment, and the same component numbers represent the same component structure and function. The body 301 of the wireless charging device 3b of the present embodiment is a cylinder, and a transmitting film coil component 31 is disposed in the cylinder, wherein the resonant antenna 313 of the transmitting film coil component 31 is disposed in the cylinder. The side wall 305 of the body is wound around the side wall 305 of the cylinder in a three-dimensional spiral manner, and the oscillating antenna 312 of the transmitting film coil element 31 is disposed in the bottom wall 306 of the cylinder.

[0031]

Figure 14 is a block diagram showing the structure of a fourth embodiment of the wireless charging device of the present invention. As shown in FIG. 14, in this embodiment, the component structure and function of the wireless charging device 3c are the same as those of the wireless charging device 3 shown in the first embodiment, and the same component numbers represent the same component structure and function. Therefore, the body 301 of the wireless charging device 3c of the present embodiment is a cylinder, and the multi-array transmitting film coil component 31 is disposed in the sidewall 305 of the cylinder. The wireless charging device 3c further includes two other sets of transmitting film coil elements 31a, 31b, wherein the transmitting film coil element 31a is disposed in the bottom wall 306 of the barrel, and the transmitting film coil element 31b is disposed in the cover 302, wherein the transmitting film coil element The structure and function of the elements 31a and 31b are similar to those of the transmitting film coil element 31, and will not be described herein.

[0032]

Fig. 15 is a view showing the configuration of a fifth embodiment of the wireless charging device of the present invention. As shown in FIG. 12, in this embodiment, the component structure and function of the wireless charging device 3d are the same as those of the wireless charging device 3 shown in the first embodiment, and the same component numbers represent the same component structure and function. The main body 301 of the wireless charging device 3d of the present embodiment is a U-shaped body structure, and the multi-array transmitting film coil component 31 is disposed in the sidewall 305 and the bottom wall 306 of the U-shaped body structure. The cover 302 is in a box structure and can completely cover the covering body 301. The first shielding portion 341 of the shielding member 34 is attached to the outer surface of the body 301, and the second shielding portion 342 is attached to the outer surface of the cover 302. After the cover body 302 covers the cover body 301, the wireless charging device 3 can be covered by the shielding member 34 to block the electromagnetic wave from being diverged outward, and the electromagnetic wave can be concentrated in the accommodating space 303 to be received in the accommodating space 303. One or more of the power receiving devices 4 are charged to increase the charging efficiency.

[0033]

In summary, the present invention provides a wireless charging device and system. The wireless charging device of the present invention can transmit electromagnetic waves of a specific frequency or a plurality of different frequencies to wirelessly charge one or more power receiving devices, and can suppress the electromagnetic wave divergence to reduce The electromagnetic wave damages the user, and can concentrate the electromagnetic wave to a charging area to perform non-contact charging on one or more power receiving devices, and strengthen the electromagnetic wave amount to improve the charging efficiency. The wireless charging device of the present invention has an accommodating space for one or more power receiving devices to be placed, and can ensure that the one or more power receiving devices that can receive electromagnetic waves of the same frequency or different frequencies can be simultaneously or time-divisionally in the accommodating space. Wireless charging is performed simultaneously and efficiently, and the structure is simple, the cost can be reduced, and the versatility and convenience of use can be increased. In addition, the wireless charging system of the present invention includes the foregoing wireless charging device and one or more power receiving devices, which can adaptively or selectively switch wireless charging using magnetic resonance coupling or magnetic induction, and can achieve the foregoing effects.

[0034]

This case has been modified by people who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.

3‧‧‧Wireless charging device

4‧‧‧Power receiving device

30‧‧‧Shell

31‧‧‧Transmitting film coil components

34‧‧‧Shielding components

301‧‧‧ Ontology

302‧‧‧ cover

303‧‧‧ accommodating space

304‧‧‧ openings

305‧‧‧ side wall

306‧‧‧ bottom wall

34‧‧‧Shielding components

341‧‧‧First Screening Department

342‧‧‧Second shield

L‧‧‧ central axis

AA‧‧‧ section

B‧‧‧ Radial

Claims (1)

A wireless charging device for wirelessly charging one or more power receiving devices, the wireless charging device comprising:
a housing includes a body having an accommodating space and an opening, the accommodating space receiving the one or more power receiving devices;
At least one set of transmitting film coil elements disposed in the body and configured to emit electromagnetic waves of a specific frequency or a plurality of different frequencies to wirelessly charge the one or more power receiving devices, wherein each of the groups of the transmitting film coil elements comprises At least one antenna for receiving an alternating current signal, wherein the electromagnetic wave is emitted; and a shielding member attached to an outer surface of the body or disposed in the body and at least partially covering the antenna of the transmitting thin film coil component The structure blocks the electromagnetic wave from diverging outward.
2. The wireless charging device of claim 1, wherein each of the transmitting thin film coil components comprises a flexible substrate, a resonant antenna, and a resonant antenna, the resonant antenna and the resonant antenna being located in the flexible The two opposite sides of the substrate receive the alternating current signal, the two ends of the resonant antenna are connected to one or more capacitors, and the resonant antenna is coupled to the vibrating antenna to emit the electromagnetic wave.
3. The wireless charging device of claim 2, wherein each of the set of the transmitting film coil components further comprises:
a first protective layer covering the oscillating antenna; and a second protective layer covering the resonant antenna;
The shielding component is attached to one of the first protective layers or disposed between the first protective layer and the vibrating antenna.
4. The wireless charging device of claim 2, wherein the flexible substrate is a bonding layer, and the material of the bonding layer is selected from the group consisting of a photocurable bonding material, a heat curing bonding material, and a magnetic material. Curing bonding material, ethylene-vinyl acetate copolymer rubber, polyamide adhesive, rubber adhesive, polyolefin adhesive or moisture hardening polyurethane adhesive.
5. The wireless charging device of claim 2, wherein the flexible substrate has a first surface and a second surface, the first surface and the two sides of the flexible substrate respectively comprise a bonding layer, and The oscillating antenna and the resonant antenna are respectively disposed on the first surface and the second surface of the flexible substrate by using the bonding layer, wherein the material of the bonding layer is selected from a photocurable bonding material, a heat curing bonding material, A solidified bonding material mixed with a magnetic material, an ethylene-vinyl acetate copolymer rubber, a polyamide rubber, a rubber rubber, a polyolefin rubber or a moisture-curing polyurethane rubber.
6. The wireless charging device of claim 2, wherein the body further comprises a side wall and a bottom wall, and the system is a cylinder, wherein the resonant antenna of the transmitting film coil component is three-dimensional The spiral antenna is disposed in the sidewall, and the oscillating antenna of the transmitting film coil component is disposed in the bottom wall.
7. The wireless charging device of claim 1, wherein the housing further comprises a cover, and the cover system covers the opening of the body.
8. The wireless charging device of claim 7, wherein the shielding component comprises:
a first shielding portion attached to the outer surface of the body and covering the transmitting film coil component; and a second shielding portion attached to an outer surface of the cover.
9. The wireless charging device of claim 7, wherein the body further comprises a side wall and a bottom wall, and the system is a cylinder or a box, wherein the cover system is pivotally connected to the body And the at least one set of transmitting film coil components are disposed in the sidewall of the body.
10. The wireless charging device of claim 9, further comprising two sets of additional transmitting film coil elements disposed in the bottom wall of the body and in the cover.
11. The wireless charging device of claim 7, wherein the body further comprises a side wall and a bottom wall, and the system is a U-shaped body structure, wherein the cover system is a box structure, At least one set of emissive film coil elements are disposed in the sidewall and the bottom wall, and the cover system covers the body.
12. The wireless charging device of claim 1, further comprising a protective layer at least partially covering the shielding element.
13. The wireless charging device of claim 1, wherein the shielding element is a metal mesh film, a magnetic conductive film, or a combination thereof.
14. The wireless charging device of claim 13, wherein the metal mesh film material is selected from the group consisting of copper, gold, silver, aluminum, tungsten, chromium, titanium, indium, tin, nickel, iron or a metal composite composed of at least two of them.
15. The wireless charging device of claim 13, wherein the metal mesh film has a grid pattern, the grid pattern comprising a plurality of grid cells, wherein each of the grid cells is adjacent to each other However, the non-connected metal microwires have a pitch which is less than one wavelength of the electromagnetic wave.
16. The wireless charging device of claim 13, wherein the magnetic conductive film comprises a soft magnetic material, which is made of ferrite, zinc-nickel ferrite, zinc-manganese ferrite or iron-iron-aluminum. The alloy is composed of a bonding material.
The wireless charging device of claim 1, further comprising at least one set of transmitting modules, the transmitting module being electrically connected to the corresponding transmitting film coil component and comprising:
a power conversion circuit electrically connected to a power source and converting the power provided by the power source;
An oscillator coupled to the power conversion circuit and variably outputting the alternating signal of a specific frequency;
a power amplifier connected to the oscillator and the power conversion circuit, and configured to amplify the AC signal; and a filter circuit coupled to the power amplifier and configured to filter the AC signal and output the AC signal to the The film coil element is emitted.
18. A wireless charging system comprising:
A wireless charging device comprising:
a housing includes a body having an accommodating space and an opening;
At least one set of transmitting thin film coil elements disposed in the body and configured to emit electromagnetic waves of a specific frequency or a plurality of different frequencies, wherein each of the set of the transmitting thin film coil elements includes at least one antenna to receive an alternating current signal, and the transmitting An electromagnetic wave; and a shielding member attached to an outer surface of the body or disposed in the body and at least partially covering the antenna of the transmitting film coil component to be configured to block the electromagnetic wave from diverging outward; and at least one The power receiving device is received in the accommodating space of the housing, and includes a receiving film coil component, wherein the receiving film coil component is coupled to the transmitting film coil component of the wireless charging device to receive the wireless charging device Energy.
19. The wireless charging system of claim 18, wherein each of the set of the transmitting film coil components of the wireless charging device comprises a flexible substrate, a resonant antenna, and a resonant antenna, the resonant antenna and the resonant An antenna is located on opposite sides of the flexible substrate, the oscillating antenna receives the alternating current signal, and the two ends of the resonant antenna are connected to one or more capacitors, and the resonant antenna is coupled to the oscillating antenna to emit the antenna Electromagnetic waves.
20. The wireless charging system of claim 19, wherein the receiving film coil component of the power receiving device has the same structure as the transmitting film coil component of the wireless charging device.
21. The wireless charging system of claim 18, wherein the power receiving device further comprises a receiving module coupled to the receiving film coil component for converting energy received by the receiving film coil component, the receiving Modules include:
a filter circuit connected to the receiving film coil component and filtering an alternating current signal outputted by the receiving film coil component;
a rectifier circuit connected to the filter circuit for converting the alternating current signal into a direct current power source;
a voltage stabilizing circuit connected to the rectifying circuit to stabilize the DC power source at a rated voltage value; and a DC voltage regulating circuit connected to the voltage stabilizing circuit and a load for voltage adjusting the DC power source And output to the load.
22. The wireless charging system of claim 18, wherein the wireless charging device further comprises a controller configured to control the wireless charging device to wirelessly charge the powered device in a magnetic resonance or magnetic coupling manner.