WO2019070294A1

WO2019070294A1 - Wireless charging devices

Info

Publication number: WO2019070294A1
Application number: PCT/US2017/055594
Authority: WO
Inventors: Chien-Ting Lin; Chi-Hao Chang; Kuan-Ting Wu
Original assignee: Hewlett Packard Development Co LP
Current assignee: Hewlett Packard Development Co LP
Priority date: 2017-10-06
Filing date: 2017-10-06
Publication date: 2019-04-11
Anticipated expiration: 2020-04-06

Abstract

Les exemples donnés dans la présente invention concernent des dispositifs de charge sans fil. Par exemple, un dispositif de charge sans fil peut comprendre un premier boîtier, une bobine de transmission d'énergie disposée dans le premier boîtier, et un second boîtier disposé dans le premier boîtier à proximité de la bobine de transmission d'énergie, le second boîtier comprenant une cavité servant à recevoir un liquide.The examples given in the present invention relate to wireless charging devices. For example, a wireless charging device may include a first housing, a power transmission coil disposed in the first housing, and a second housing disposed in the first housing near the power transmission coil, the second housing housing comprising a cavity for receiving a liquid.

Description

WIRELESS CHARGING DEVICES

Background

[0001] Electronic devices such as mobile phones, headphones, tablets, and/or laptops, etc. may utilize rechargeable batteries to provide power to the electronic device. A battery of an electronic device may be wireiessly charged. For example, a wireless charging pad may wireiessly charge a rechargeable battery of an electronic device positioned on and/or near the wireless charging pad.

Brief Description of the Drawings

[0002] Figure 1 illustrates an example of a wireless charging device consistent with the disclosure.

[0003] Figure 2 illustrates an example of a wireless charging device consistent with the disclosure.

[0004] Figure 3 illustrates a perspective view of an example of a wireless charging device consistent with the disclosure.

[0005] Figure 4 is a schematic illustration of an example of a system including a wireless charging device consistent with the disclosure.

[0006] Figure 5 illustrates an example of a wireless charging device consistent with the disclosure. Detailed Description

[0007] An electronic device such as a mobile phone, headphones, a tablet, and/or a laptop, among other types of electronic device can include a battery. The battery can be a rechargeable battery. The rechargeable battery may be wirelessiy charged by a wireless charging device. As used herein, wireless charging devices refer to electronic devices that can wirelessiy charge a rechargeable battery of an electronic device. Wirelessiy charging (i.e., wireless charging, wirelessiy charge), as used herein, refers to charging a battery of an electronic device in the absence of a wired connection between the electronic device and a source of power external to the electronic device that provides power to charge the rechargeable battery.

[0008] For example, a wireless charging device may wirelessiy charge a battery of an electronic device positioned on and/or near the wireless charging device. A wireless charging device may include a power transmitting coil and wireless charging support circuitry. The power transmitting coil may transmit power (e.g., inductively) to a battery of an electronic device, while the wireless charging support circuitry may provide functions to the wireless charging device but itself is not directly utilized for the transmission of power from the wireless charging device to the battery of the electronic device.

[0009] The transmission of power from the wireless charging device to an electronic device can cause the wireless charging device and the electronic device to increase in temperature, increasing temperatures of a wireless charging device may reduce the charging performance of the wireless charging device. For example, the wireless charging device may decrease in efficiency, charging speed, etc.

[0010] As such, a wireless charging device, as described herein, may include a combination of thermal conductive plastic, heat dissipating metals, and a liquid such as a high specific heat capacity liquid to improve the charging speed and efficiency of wireless charging as compared to other approaches such as those that do not employ a liquid. That is, the combination of thermal conductive plastic, heat dissipating metals, and liquid (e.g., high specific heat capacity liquid) in a wireless charging device may resolves hot spot issues and/or extend the life of the wireless charging device. [0011] Figure 1 illustrates an example of a wireless charging device 100 consistent with the disclosure. The wireless charging device 100 may be used in conjunction with a variety of electronic devices such as mobile phones, headphones, tablets, and/or laptops, etc. In some examples, the wireless charging device 100 can include a first housing 102, a power transmitting coil 104, and a second housing 106.

[0012] The first housing 102 can have an internal volume defined by a top surface 108, a plurality of side surfaces 1 10, and a bottom surface 1 12. In some examples, the top surface 108 can be comprised of thermal conductive plastic with a thermal conductivity of higher than 3 watts per meter-kelvin (W/m-K). In some examples, the top surface 108 can be comprised of electric insulation plastic with an electrical resistivity of higher than 10 ohm-meters (Q m). In various examples, the top surface 108 can be substantially coplanar with the bottom surface 1 12. As used herein, being substantially coplanar refers to being on (in terms of degree) the same or similar plane but being spaced apart from the other surface.

[0013] In some examples, the bottom surface 1 12 can be comprised out of thermal conductive plastic with a thermal conductivity higher than 3 watts per meter- kelvin (W/m-K). in some examples, the top surface 108 can be comprised of electric insulation plastic with an electrical resistivity higher than 10 ohm-meters (Q m). In some examples, the bottom surface 1 12 can be comprised of a heat dissipating metal formed of aluminum, silver, magnesium, copper, or combinations thereof, in some examples, a bottom surface 1 12 comprised of heat dissipating metal can cause the heat produced by the wireless charging device to dissipate or release into the environment, in various examples, the bottom surface 1 12 can be substantially coplanar with the top surface 108,

[0014] As illustrated in Figure 1 , the first housing 102 can include four side surfaces 1 10 extending from a top surface 108 or the bottom surface 1 12 in a direction towards the other of the top surface 108 or bottom surface 1 12. As used herein, side surfaces 1 10 can include any surface that extends from the top surface 108 or the bottom surface 1 12 in a direction towards the other of the top surface 108 or bottom surface 1 12. However, the disclosure is not so limited. The wireless charging device 100 can include an individual side surface 1 10 or more side surfaces 1 10 extending from a top surface 108 or the bottom surface 1 12 in a direction towards the other of the top surface 108 or bottom surface 1 12,

[0015] In some examples, the side surfaces 1 10 can be comprised of a heat dissipating metal formed of aluminum, silver, magnesium, copper, or combinations thereof. In some examples, the side surfaces 1 10 can extending from a top surface 108 or the bottom surface 1 12 in a direction towards the other of the top surface 108 or bottom surface 1 12. In some examples, side surfaces 1 10 comprised of heat dissipating metal can cause the heat produced by the wireless charging device to dissipate or release into the environment.

[0016] The first housing 102 can form an exterior surface of the wireless charging device 100. In various examples, the power transmitting coil 104 can be disposed in the first housing 102. For instance, in various examples, the power transmitting coil 104 can be entirely disposed within the first housing 102. That is, while the power transmitting coil 104 is illustrated as visible in Figure 1 , it is understood that, in various examples, the power transmitting coil 04 is disposed within the first housing 102 and not visible to an end user of the wireless charging device 100 (unless the housing were formed of a material that is transparent/semi-transparent).

[0017] in some examples, the power transmitting coil 104 can be a resonator coil. As used herein, a resonator coil refers to equipment that can wireiessiy transmit power. Examples of resonator coils include a wire coil and/or a printed circuit board coil.

However, the disclosure is not so limited. Rather, the power transmitting coil 104 can include a soienoidai wire, among other suitable types of power transmitting coils 104 to wireless transmit power to an electronic device.

[0018] in various examples, the second housing 106 can be disposed within the first housing 102. For instance, in various examples, the second housing 106 can be entirely disposed within the first housing 102. That is, while the second housing 106 is illustrated as visible in Figure 1 , it is understood that, in various examples, the second housing 106 is disposed within the first housing 102 and not visible to an end user of the wireless charging device 100 (unless the housing were formed of a material that is transparent/semi-transparent). [0019] In various examples, the second housing 106 can form a cavity 107 within which liquid can be disposed. In some examples, the second housing 106 can occupy from 40 to 90% of the internal volume of the first housing 102, All individual values and subranges from 40 to 90% volume are included and disclosed herein. For example, the second housing 106 can occupy an internal volume of the first housing 102 ranging from a lower limit of 40, 50, 60, 70, or 80% volume to an upper limit of 45, 55, 65, 75, 85, or 90% volume. For example, the second housing 106 can occupy an internal volume of the first housing 102 from 40 to 90% volume, or in the alternative, from 40 to 60% volume, or in the alternative from 60 to 90% volume, or in the alternative from 50 to 80% volume.

[0020] Figure 2 illustrates an example of a wireless charging device 200 consistent with the disclosure. The wireless charging device 200 may be used in conjunction with a variety of electronic devices such as mobile phones, headphones, tablets, and/or laptops, etc. In some examples, the wireless charging device 200 can include a first housing 202, a power transmitting coil 204, and a second housing 206. The first housing 202 can have an internal volume defined by a top surface 208, side surfaces 210, and a bottom surface 212. In various examples, the top surface 208 can be substantially coplanar with the bottom surface 212.

[0021] As illustrated in Figure 2, the first housing 202 can include four side surfaces 210 extending from a top surface 208 or the bottom surface 212 in a direction towards the other of the top surface 208 or bottom surface 212. However, the disclosure is not so limited. The wireless charging device 200 can include an individual side surface 210 or more side surfaces 210 extending from a top surface 208 or the bottom surface 212 in a direction towards the other of the top surface 208 or bottom surface 212.

[0022] The first housing 202 can form an exterior surface of the wireless charging device 200. in various examples, the power transmitting coil 204 can be disposed in the first housing 202. For instance, in various examples, the power transmitting coil 204 can be entirely disposed within the first housing 202. That is, while the power transmitting coil 204 is illustrated as visible in Figure 2, it is understood that, in various examples, the power transmitting coil 204 is disposed within the first housing 202 and not visible to an end user of the wireless charging device 200.

[0023] in various examples, the second housing 206 can be disposed within the first housing 202. For instance, in various examples, the second housing 206 can be entirely disposed within the first housing 202. That is, while the second housing 206 is illustrated as visible in Figure 2, it is understood that, in various examples, the second housing 206 is disposed within the first housing 202 and not visible to an end user of the wireless charging device 200.

[0024] in various examples, the second housing 206 can form a cavity 207 within which liquid can be disposed, in some examples, the second housing 206 can occupy from 40 to 90% of the internal volume of the first housing 202.

[0025] in some examples, the first housing 202 can include an opening 2 8 to communicate liquid (or transfer liquid in and out of the wireless charging device 200). In some examples, the second housing 206 can include an opening 216 to communicate liquid (or transfer liquid in and out of the wireless charging device 200). In various examples, the opening 216 can be coupled to the opening 218. In some examples, a seal 220 can be used to close the opening 216 and the opening 218.

[0026] Figure 3 illustrates a perspective view of an example of a wireless charging device 300 consistent with the disclosure. The wireless charging device 300 is a perspective view of wireless charging device 100 taken along the line 101 as described herein with respect to Figure 1. The wireless charging device 300 may be used in conjunction with a variety of electronic devices such as mobile phones, headphones, tablets, and/or laptops, etc. In some examples, the wireless charging device 300 can include a first housing 302, a power transmitting coil 304, and a second housing 306. The first housing 302 can have an internal volume defined by a top surface 308, side surfaces 310, and a bottom surface 312.

[0027] The first housing 302 can form an exterior surface of the wireless charging device 300. In various examples, the power transmitting coil 304 can be disposed in the first housing 302. For instance, in various examples, the power transmitting coil 304 can be entirely disposed within the first housing 302. That is, while the power transmitting coil 304 is illustrated as visible in Figure 3, if is understood that, in various examples, the power transmitting coil 304 is disposed within the first housing 302 and not visible to an end user of the wireless charging device 300.

[0028] in various examples, the second housing 306 can be disposed within the first housing 302. For instance, in various examples, the second housing 306 can be entirely disposed within the first housing 302. That is, while the second housing 306 is illustrated as visible in Figure 3, it is understood that, in various examples, the second housing 306 is disposed within the first housing 302 and not visible to an end user of the wireless charging device 300.

[0029] in various examples, the second housing 306 can form a cavity 307 within which liquid can be disposed, in some examples, the second housing 306 can occupy from 40 to 90% of the internal volume of the first housing 302.

[0030] The wireless charging device 300 displays the vertical (along the 399 axis) stacking or layering of the internal volume of the first housing 302. in some examples, the top surface 308 can comprises the first layer of the wireless charging device 300. In some examples, the second housing 306 can comprises the second layer of the wireless charging device 300. In various examples, the second housing 306 can be adjacent to the top surface 308 comprising the first layer of the wireless charging device 300. in some examples, the power transmitting coil 304 can comprises the third layer of the wireless charging device 300. in various examples, the power transmitting coil 304 can be adjacent to the second housing 306 comprising the second layer of the wireless charging device 300. in some examples, the bottom surface 312 can comprises the fourth layer of the wireless charging device 300. in some examples, the bottom surface 312 can be adjacent to the power transmitting coil 304 comprising the third layer of the wireless charging device 300. The stacking arrangement of the wireless device 300 can allow the second housing 306, forming a cavity 307 within which liquid can be disposed, to be positioned between the power transmitting coil 304 and the top surface 308. in some examples, the wireless device 300 can have an electronic device positioned on and/or near the top surface 308.

[0031] Figure 4 is a schematic illustration of an example of a system including a wireless charging device 400 consistent with the disclosure. In some examples, the system 428 can include a power cord 424 that is coupled to the wireless charging device 400, In some examples, the system 428 can include power supply 426 that can power the wireless charging device 400. in various examples, the system 428 can include a power supply 426 coupled to a power cord 424 coupled to a wireless charging device 400.

[0032] Figure 5 illustrates an example of a wireless charging device 500 consistent with the disclosure. The wireless charging device 500 may be used in conjunction with a variety of electronic devices such as mobile phones, headphones, tablets, and/or laptops, etc. In some examples, the wireless charging device 500 can include a first housing 502, a power transmitting coil 504, a second housing 506, and a power interconnect 522. The first housing 502 can have an internal volume defined by a top surface 508, side surfaces 510, and a bottom surface 512. In various examples, the top surface 508 can be substantially coplanar with the bottom surface 512.

[0033] As illustrated in Figure 5, the first housing 502 can include four side surfaces 510 extending from a top surface 508 or the bottom surface 512 in a direction towards the other of the top surface 508 or bottom surface 512. However, the disclosure is not so limited. The wireless charging device 500 can include an individual side surface 510 or more side surfaces 510 extending from a top surface 508 or the bottom surface 512 in a direction towards the other of the top surface 508 or bottom surface 512.

[0034] in some examples, the first housing 502 is coupled to a power

interconnect 522. The power interconnect 522 can be located on any surface of the first housing 502. That is, while the power interconnect 522 is illustrated as being coupled to the side surface 510 in Figure 5, it is understood that, in various examples, the power interconnect 522 can be coupled to the top surface 508, the bottom surface 512, or any side surface 510 of the first housing 502. in some examples, a power cord 524 can be detached from the wireless charging device 500. In various examples, the power cord 524 can be coupled to the power interconnect 522,

[0035] The first housing 502 can form an exterior surface of the wireless charging device 500. in various examples, the power transmitting coil 504 can be disposed in the first housing 502. For instance, in various examples, the power transmitting coil 504 can be entirely disposed within the first housing 502. That is, while the power transmitting coil 504 is iliustrated as visible in Figure 5, it is understood that, in various examples, the power transmitting coil 504 is disposed within the first housing 502 and not visible to an end user of the wireless charging device 500,

[0036] In various examples, the second housing 506 can be disposed within the first housing 502. For instance, in various examples, the second housing 506 can be entirely disposed within the first housing 502. That is, while the second housing 506 is illustrated as visible in Figure 5, it is understood that, in various examples, the second housing 506 is disposed within the first housing 502 and not visible to an end user of the wireless charging device 500.

[0037] in some examples, the second housing 506 can occupy from 40 to 90% of the internal volume of the first housing 502. In various examples, the second housing 506 can form a cavity 507 within which liquid can be disposed. In some examples, a liquid 514 can be disposed in the second housing 506. In various examples, the liquid 514 disposed in the cavity 507 of the second housing 506 can be a high specific heat capacity liquid with a specific heat capacity higher than 4.0 kilojoules per kilogram- Kelvin (kj/Kg - K).

[0038] The figures herein follow a numbering convention in which the first digit corresponds to the drawing figure number and the remaining digits identify an element or component in the drawing. Elements shown in the various figures herein may be capable of being added, exchanged, and/or eliminated so as to provide a number of additional examples of the disclosure. In addition, the proportion and the relative scale of the elements provided in the figures are intended to illustrate the examples of the disclosure, and should not be taken in a limiting sense.

[0039] it will be understood that when an element is referred to as being "on," "connected to", "coupled to", or "coupled with" another element, it can be directly on, connected, or coupled with the other element or intervening elements may be present. In contrast, when an object is "directly coupled to" or "directly coupled with" another element it is understood that are no intervening elements (adhesives, screws, other elements) etc.

[0040] The foregoing description of various examples has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive or limiting to the examples disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of carious examples, and it is to be understood that other examples (e.g., having different thickness) may be utilized and that process, electrical, and/or structural changes may be made without departing from the scope of the disclosure. The examples discussed herein were chosen and described in order to explain the principles and the nature of various examples of the disclosure and its practical application to enable one skilled in the art to utilize the disclosure in various examples and with various modifications as are suited to the particular use contemplated. The features of the examples described herein may be combined in all possible combinations of methods, apparatus, modules, systems, and computer program products.

[0041] As used herein, "a number of an element and/or feature can refer to one or more of such elements and/or features. Further still, while some elements are designated as a "top" or a "bottom" those in the art will recognize that such elements may correspond to other relative terms or possible orientations in some applications in order to practice the examples of this disclosure.

Claims

What is claimed:

1 . A wireless charging device, comprising:

a first housing;

a power transmitting coil disposed in the first housing; and

a second housing disposed in the first housing adjacent to the power transmitting coil, the second housing defining a cavity to receive liquid,

2. The wireless charging device of claim 1 , wherein the first housing further comprises a top surface, a bottom surface, and side surfaces.

3. The wireless charging device of claim 2, wherein the top surface is comprised of a thermal conductive plastic, wherein the thermal conductive plastic has a thermal conductivity higher than 3 watts per meter-kelvin (W/rrv K).

4. The wireless charging device of claim 3, wherein the thermal conductive plastic has an electrical resistivity higher 10 ohm-meters (D m).

5. The wireless charging device of claim 1 , wherein the second housing occupies at least 40% to 90% of the internal volume of the first housing.

6. The wireless charging device of claim 2, wherein the side surfaces are comprised of a heat dissipating metal, wherein the heat dissipating metal further comprises aluminum, silver, magnesium, copper, or combinations thereof.

7. The wireless charging device of claim 1 , wherein the second housing contains a high specific heat capacity liquid, wherein the high specific heat capacity liquid has a heat capacity higher than 4.0 kiiojoules per kiiogram-Keivin (kj/Kg- K).

8. A wireless charging device, comprising: a first housing having an internal volume defined by a top surface, a bottom surface, and side surfaces;

a power transmitting coil disposed in the interna! volume of the first housing; a second housing disposed in the internal volume of the first housing adjacent to the power transmitting coil, the second housing defining a cavity; and

a liquid disposed in the cavity defined by the second housing.

9. The wireless charging device of claim 8, wherein the bottom surface is comprised of a heat dissipating metal, wherein the heat dissipating metal further comprises aluminum, silver, magnesium, copper, or combinations thereof.

10. The wireless charging device of claim 8, wherein the bottom surface is comprised of a thermal conductive plastic, wherein the thermal conductive plastic has a thermal conductivity higher than 3 Watts per meter-Kelvin (W/m-K).

1 1. The wireless charging device of claim 8, wherein the wireless charging device includes a stacking arrangement including:

a first layer comprised of the top surface, wherein the top surface is comprised of thermal conductive plastic;

a second layer comprised of the second housing defining the cavity;

a third layer comprised of the power transmitting coil; and

a fourth layer comprised of the bottom surface, wherein the bottom surface is comprised of heat dissipating metal or thermal conductive plastic.

12. The wireless charging device of claim 8, wherein:

the first housing includes a seaiable opening to communicate liquid; and the second housing includes a seaiable opening to communicate liquid, wherein the seaiable opening of the second housing is coupled to the seaiable opening of the first housing.

13. A system comprising: a power cord to couple a wireless charging device to a power supply; and a wireless charging device, comprising:

a first housing having an internal volume defined by a top surface, a bottom surface, and side surfaces;

a power transmitting coil disposed in the internal volume of the first housing; and

a second housing disposed in the internal volume of the first housing adjacent to the power transmitting coil, the second housing defining a cavity to receive a liquid.

14. The system of claim 13, wherein a liquid is disposed in the cavity defined by the second housing. 5. The system of claim 13, wherein the power cord is to removably couple to a power interconnect of the wireless charging device.