CN219227286U - Wireless charging equipment - Google Patents

Abstract

The utility model discloses wireless charging equipment which comprises a transmitting coil, a transmitting driving plate, a hollow frame body, a top plate, an air baffle plate and a heat dissipation device. The hollow frame body comprises a first surface and a second surface which are oppositely arranged, the first surface comprises a first outer surface and a first inner surface, the second surface comprises a second outer surface and a second inner surface, the transmitting coil is arranged on the first outer surface, and the transmitting driving plate is arranged on the second outer surface; the top plate is used for covering the transmitting coil arranged on the first outer surface and is attached to the first outer surface; the air baffle plate is arranged between the first inner surface and the second inner surface, a first air channel is formed between the air baffle plate and the first inner surface, and a second air channel is formed between the air baffle plate and the second inner surface.

Description

Wireless charging equipment

Technical Field

The present utility model relates to a wireless charging device, and more particularly, to a high-power vehicle-mounted wireless charging device for increasing charging power and charging speed.

Background

In the vehicle-mounted wireless charging process, mobile devices such as wireless charging equipment and mobile phones can generate much heat, so that the temperature of the devices is increased. Typically, the primary heat generating portion comprises a transmit coil and transmit drive board in the wireless charging device, as well as a receive coil, battery and other electronics in the mobile device.

Mobile devices such as cell phones typically have a temperature threshold that when exceeded by the temperature of the mobile device can cause the charging to cease or derate. In addition, the battery capacity of mobile devices such as mobile phones currently shows a trend of increasing, and meanwhile, users have a requirement of shortening the wireless charging time. This increases the heat generation during charging. More heat results in higher temperatures, which in turn affect the charging performance, lifetime and user experience of the device.

Currently, commercially available vehicle-mounted high-power (50W and above) wireless charging devices are generally provided with ventilation holes through which a fan can supply air to mobile devices such as mobile phones. The presence of the vent not only destroys the integrity of the wireless charging device against liquids and dust, but also is detrimental to the automotive host factory's appearance. Furthermore, more importantly, the current wireless charging device has defects in a stacking mode of a system structure, and a transmitting coil and a transmitting driving plate of the mobile device and the wireless charging device are overlapped on a heat dissipation path. This causes the thermal effects of the heat generating sources to couple with each other, which is detrimental to achieving heat dissipation of the wireless charging device itself and heat dissipation of its cooperating mobile device in a confined space.

In view of this, how to develop a wireless charging device that can eliminate the above drawbacks of the prior art is an urgent need in the art.

Disclosure of Invention

The present utility model is directed to a wireless charging device that overcomes one or more of the shortcomings of the prior art.

In order to achieve the above object, the present utility model provides a wireless charging apparatus including a transmitting coil and a transmitting drive board, characterized in that the wireless charging apparatus further includes: the hollow frame body comprises a first surface and a second surface which are arranged in opposite directions, the first surface comprises a first outer surface and a first inner surface, the second surface comprises a second outer surface and a second inner surface, the transmitting coil is arranged on the first outer surface, and the transmitting driving plate is arranged on the second outer surface; the top plate is used for covering the transmitting coil arranged on the first outer surface and is attached to the first outer surface; the air baffle plate is arranged between the first inner surface and the second inner surface, a first air channel is formed between the air baffle plate and the first inner surface, and a second air channel is formed between the air baffle plate and the second inner surface; and a heat sink.

According to one embodiment of the utility model, the top plate is internally paved with conductive circuits for shielding electromagnetic interference.

According to an embodiment of the present utility model, the first inner surface is provided with a first fin, and the first fin is a high thermal conductivity fin.

According to an embodiment of the present utility model, the second inner surface is provided with a second fin, and the second fin is a high thermal conductivity fin.

According to an embodiment of the present utility model, the display device further comprises a bottom plate for covering the emission driving plate disposed on the second outer surface.

According to one embodiment of the present utility model, the hollow frame is a high thermal conductivity top plate, the top plate is a high thermal conductivity top plate, and the bottom plate is a high thermal conductivity bottom plate.

According to an embodiment of the present utility model, the hollow frame includes a first frame and a second frame that are detachable, and the first surface and the second surface are respectively located in the first frame and the second frame.

According to an embodiment of the present utility model, the top plate further includes a protrusion, and the protrusion is disposed on the first outer surface and is attached to the top plate.

According to an embodiment of the present utility model, the heat dissipating device includes a fan, and an output airflow of the fan is blown out along the first air channel and the second air channel.

According to an embodiment of the present utility model, the heat dissipating device further includes a heat pipe disposed between the first outer surface and the transmitting coil.

According to an embodiment of the present utility model, the heat dissipating device further includes a thermoelectric cooler disposed between the top plate and the first outer surface.

According to an embodiment of the present utility model, the heat dissipating device further includes a thermoelectric cooler, the thermoelectric cooler is disposed between the top plate and the first outer surface, and a hot surface of the thermoelectric cooler is attached to the heat pipe.

According to one embodiment of the utility model, the thermoelectric coolers are two in number and are respectively arranged at the first end and the second end which are opposite to each other on the first outer surface.

According to one embodiment of the utility model, the thermoelectric coolers are two in number and are respectively arranged at the first end and the second end which are opposite to each other on the first outer surface.

According to one embodiment of the utility model, the air barrier is a low thermal conductivity air barrier.

According to one embodiment of the utility model, the air baffle is a plastic air baffle or a glass fiber epoxy resin air baffle.

According to the wireless charging equipment provided by the utility model, the heat dissipation of the wireless charging equipment is realized in a limited space, and the heat dissipation is performed in cooperation with the mobile equipment to the maximum extent, so that the charging power and the charging speed of the wireless charging equipment are improved, meanwhile, the invasion of liquid and dust into the wireless charging equipment is prevented, and the requirements of an automobile whole factory on the appearance are also met.

Drawings

In order to more clearly illustrate the technical solution of the implementation of the present utility model, the following description will briefly explain the drawings that are required to be used in the embodiments.

Fig. 1 is an external view schematically showing a wireless charging apparatus according to a first embodiment and a second embodiment of the present utility model, in which a mobile device is placed on a top plate of the wireless charging apparatus;

fig. 2 is an exploded view of a wireless charging device according to a first embodiment of the present utility model;

fig. 3 is a schematic cross-sectional view of a wireless charging device according to a first embodiment of the present utility model;

fig. 4 is a schematic top plate structure of a wireless charging device according to a first embodiment of the present utility model;

fig. 5 is an equivalent thermal diagram of a wireless charging device according to a first embodiment of the present utility model;

fig. 6 is an exploded view of a wireless charging device according to a second embodiment of the present utility model;

fig. 7 is a schematic cross-sectional view of a wireless charging device according to a second embodiment of the present utility model;

fig. 8 is an equivalent thermal diagram of a wireless charging device according to a second embodiment of the present utility model.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," "the," and "at least one" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first," "second," and the like in the claims are used merely as labels, and are not intended to limit the numerals of their objects.

Referring to fig. 1 to 5, a first embodiment of the present utility model provides a wireless charging device 1 for rapidly and wirelessly charging a mobile device 2, fig. 1 is a schematic view of an external appearance of the wireless charging device 1, wherein the mobile device 2 is placed on a top plate 101 of the wireless charging device 1, fig. 2 is a schematic view of an exploded structure of the wireless charging device 1, fig. 3 is a schematic view of a cross-sectional structure of the wireless charging device 1, fig. 4 is a schematic view of a structure of the top plate 101 of the wireless charging device 1, and fig. 5 is an equivalent heat circuit diagram of the wireless charging device 1.

As shown in fig. 1 to 5, the wireless charging device 1 may carry the mobile device 2 and perform wireless charging on the mobile device 2, specifically, a receiving coil and other electronic modules (not shown) are disposed in the mobile device 2, the wireless charging device 1 includes a transmitting driving board 11 and a transmitting coil 12, the transmitting driving board 11 can convert external electric energy into the electric energy for use by the transmitting coil 12, and meanwhile, when the wireless charging device 1 operates, function detection and control are completed, the transmitting coil 12 can receive the electric energy output by the transmitting driving board 11 and perform electromagnetic coupling with the receiving coil of the mobile device 2, and the purpose of charging the mobile device 2 is achieved by transmitting the electric energy.

With continued reference to fig. 1-5, the wireless charging device 1 includes a housing assembly 10 and a heat dissipating device, wherein the housing assembly 10 includes a top plate 101, a hollow frame F, a wind shielding plate 103 and a bottom cover plate 105. In the present embodiment, the hollow frame F includes a first frame 102 and a second frame 104 that are detachable, wherein the first frame 102 includes a first outer surface S11 and a first inner surface S12, the second frame 104 includes a second outer surface S21 and a second inner surface S22, the first inner surface S12 and the second inner surface S22 are disposed opposite to each other, and the hollow frame F may have other structures including a first outer surface, a first inner surface, a second outer surface and a second inner surface.

In the present embodiment, the transmitting coil 12 is adhered to the first outer surface S11 of the first frame 102, and specifically, the setting position of the transmitting coil 12 corresponds to the receiving coil of the mobile device 2.

The top plate 101 is attached to the first outer surface S11 of the first housing 102 and covers the transmitting coil 12. The top plate 101 is used for placing the mobile device 2, and may be made of glass fiber epoxy (FR 4) with high copper coating rate, ceramic with high thermal conductivity, or other high thermal conductivity materials to assist in heat dissipation of the mobile device 2. As shown in fig. 4, the top plate 101 is internally laid with conductive lines for electromagnetic interference filtering (EMI), shielding electromagnetic interference or achieving electromagnetic compatibility (EMC). In addition, the top plate 101 in the present embodiment does not include a vent hole, and can prevent liquid and dust from invading the wireless charging device 1 or satisfy the requirement for the external appearance of the wireless charging device 1.

The first end on the first surface S11 of first framework 102 is provided with first boss 102a, and the second end is provided with second boss 102b, and first end and second end are relative to be set up, and first boss 102a and second boss 102b laminate with roof 101 mutually, are provided with a plurality of first fins 102c on the first internal surface S12 of first framework 102, and first framework 102 and a plurality of first fins 102c are made by high thermal conductivity material, can carry out abundant heat transfer with the flowing air with the heat that comes from mobile device 2 and transmitting coil 12 department to realize the cooling to mobile device 2 in the wireless charging process.

The air baffle plate 103 is disposed in the hollow frame F, specifically, the air baffle plate 103 is located between the first inner surface S12 and the second inner surface S22, the partition plate 103 and the first inner surface S12 form a first air channel 3, and the partition plate and the second inner surface S22 form a second air channel 4, and the first air channel 3 and the second air channel 4 are two independent air channels, so that the thermal effect interference of the emission driving plate 11 on the mobile device 2 and the emission coil 12 is eliminated. The air barrier 103 may be made of plastic or glass fiber epoxy resin with low thermal conductivity, or other low thermal conductivity materials.

The second inner surface S22 of the second frame 104 is provided with a plurality of second fins 104a, and the second frame 104 and the plurality of second fins 104a are made of a material with high thermal conductivity, so that heat and flowing air transferred from the emission driving plate 11 can be sufficiently exchanged, and the emission driving plate 11 is cooled in the wireless charging process. The second housing 104 is provided with a heat dissipating device, in this embodiment, a fan 131, as shown in fig. 3, and the fan 131 provides a driving force for air flow when the wireless charging device 1 is operated. The fan 131 drives the cold air to enter the first air channel 3 and the second air channel 4 of the wireless charging equipment 1, and after the cold air exchanges heat with the first fins 102c and the second fins 104a, the cold air is discharged along the first air channel 3 and the second air channel 4, so that heat is taken away, and the purpose of cooling the wireless charging equipment 1 is achieved.

The bottom plate 105 is attached to the second outer surface S21 of the second frame 104, and the bottom plate 105 and the second frame 104 form a receiving cavity for receiving the emission driving board 11, and the bottom plate 105 is made of high thermal conductivity material, so that heat dissipation of some low-power consumption devices on the emission driving board 11 can be considered.

Fig. 5 is an equivalent thermal circuit diagram of the wireless charging device 1 according to the first embodiment of the present utility model, and a heat dissipation path of the wireless charging device 1 is described below with reference to fig. 1 to 5.

When the mobile device 2 is placed on the top plate 101 of the wireless charging device 1 to perform wireless charging, the mobile device 2 is a third heat source HS3 in the wireless charging process, all exposed surfaces of the mobile device 2 except the surface contacted with the top plate 101 dissipate heat to the environment by virtue of natural air cooling, a thermal resistance R3 is formed between the mobile device 2 and the environment, meanwhile, the mobile device 2 transfers heat to the top plate 101 contacted with the mobile device 2 through the bottom surface of the mobile device 2, and then the heat is transferred to the first frame 102, and an interface thermal resistance JR23 is formed between the mobile device 2 and the transmitting coil 12. Because the top plate 101 and the first frame 102 are both made of high thermal conductivity materials, the interface thermal resistance JR23 is much smaller than the thermal resistance R3, even by orders of magnitude.

The transmitting coil 12 is a second heat source HS2 in the wireless charging process, the heat of the transmitting coil 12 is transferred to the first frame 102, and the first frame 102 radiates heat to the environment through the first air duct 3 formed by the air baffle 103 by means of forced air cooling, so that a thermal resistance R2 is formed between the transmitting coil 12 and the environment. Because the convection heat transfer coefficient of forced air cooling is larger than that of natural air cooling, and at the same time, due to the high heat conductivity characteristic of the first frame 102 and the large heat transfer area brought by the plurality of first fins 102c, the thermal resistance R2 is much smaller than the thermal resistance R3, and even can reach an order of magnitude difference. In addition, in the high-power wireless charging process, the heat generation amount of the transmitting coil 12 (the second heat source HS 2) is much smaller than that of the mobile device 2 (the third heat source HS 3), so that the temperature of the first housing 102 is much lower than that of the mobile device 2, and the purpose of heat dissipation of the wireless charging device 1 in cooperation with the mobile device 2 is achieved.

The emission driving plate 11 is a first heat source HS1 in the wireless charging process, the emission driving plate 11 transmits heat to the second frame 104, and then the second frame 104 radiates heat to the environment through the second air duct 4 formed by the air separation plate 103 by means of forced air cooling, so that a thermal resistance R1-1 is formed between the emission driving plate 11 and the environment. Meanwhile, the emission driving plate 11 also radiates heat to the environment through the bottom plate 105 by means of natural air cooling, and thermal resistance R1-2 is formed between the emission driving plate 11 and the environment. Compared with the heat dissipation channel of the thermal resistor R1-2, the heat dissipation channel of the thermal resistor R1-1 is the main heat dissipation channel, and most of the heat generated on the emission driving plate 11 is dissipated into the environment through the heat dissipation channel of the thermal resistor R1-1. Because of the high convection heat transfer coefficient of forced air cooling, the high heat conductivity of the second frame 104 and the large heat transfer area caused by the plurality of second fins 104a, the thermal resistance R1-1 is advantageously reduced to a certain threshold value, so as to control the temperature rise of the emission driving plate 11 within an allowable range, and enable the emission driving plate to work reliably for a long period of time.

Referring to fig. 1, 6, 7 and 8, a second embodiment of the present utility model provides a wireless charging device 1a, wherein an external schematic view of the wireless charging device 1a is also referred to fig. 1, fig. 6 is an exploded structure schematic view of the wireless charging device 1a, fig. 7 is a cross-sectional structure schematic view of the wireless charging device 1a, and fig. 8 is an equivalent heat circuit diagram of the wireless charging device 1 a.

As shown in fig. 6, compared with the structure of the wireless charging device 1 shown in fig. 2, the wireless charging device 1a further includes a heat pipe 133 and a thermoelectric cooler 132, and the fan 131, the heat pipe 132, and the thermoelectric cooler 133 together form the heat sink 13 of the wireless charging device 1 a.

The heat pipe 133 is disposed between the first outer surface S11 of the first housing 102 and the transmitting coil 12, and significantly increases the heat transfer capability of the first housing 102, that is, significantly reduces the thermal resistance R2.

In this embodiment, the wireless charging device 1a does not include the first boss 102a and the second boss 102b, and two thermoelectric coolers 132 are disposed between the top plate 101 and the first outer surface S11, specifically, disposed at a first end and a second end opposite to each other on the first outer surface S11, that is, at positions where the original first boss 102a and the original second boss 102b are located, where a cold surface of the thermoelectric cooler 132 is attached to the top plate 101 by a heat-conducting interface material or other connection means (bonding, etc.), and a hot surface of the thermoelectric cooler 132 is attached to the first outer surface S11 by a heat-conducting interface material or other connection means (bonding, etc.). When thermoelectric cooler 132 is operated under appropriate configuration conditions, the temperature of top plate 101 at and adjacent to its cold face may be made lower than ambient temperature (i.e., a so-called "cryogenic" condition). Thus, in this embodiment, the mobile device 2 transfers more heat through the thermoelectric cooler 132 than through the first and second bosses 102a, 102 b.

In other embodiments, the heat dissipation device 13 may include a heat pipe 133 alone or a thermoelectric cooler 132 alone, not limited to the arrangement in the second embodiment, and the heat pipe 132 and the thermoelectric cooler 133 provide better heat dissipation of the wireless charging device 1a and the mobile device 2, and lower temperature of the mobile device 2 compared to the first embodiment.

In summary, the wireless charging device in each embodiment of the utility model has the structural characteristics of double air channels, and in the wireless charging process, the heating sources (HS 1, HS2 and HS 3) can be directly connected with the environment for heat dissipation, so that the heat effect interference of the emission driving plate in the heating source on the mobile device and the emission coil is eliminated, and the maximum heat dissipation of the wireless charging device and the mobile device are realized in a limited space. The structural design of the double air channels blocks the thermal effect coupling of the wireless charging equipment and the mobile equipment in the wireless charging process, can obtain better integral heat dissipation performance under the same space condition, and improves the quality of the high-power wireless charging process.

The exemplary embodiments of the present utility model have been particularly shown and described above. It is to be understood that the utility model is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (16)

1. A wireless charging device comprising a transmitting coil and a transmitting drive plate, the wireless charging device further comprising:

the hollow frame body comprises a first surface and a second surface which are arranged in opposite directions, wherein the first surface comprises a first outer surface and a first inner surface, the second surface comprises a second outer surface and a second inner surface, the transmitting coil is arranged on the first outer surface, and the transmitting driving plate is arranged on the second outer surface;

the top plate is used for covering the transmitting coil arranged on the first outer surface and is attached to the first outer surface;

the air baffle plate is arranged between the first inner surface and the second inner surface, a first air channel is formed by the air baffle plate and the first inner surface, and a second air channel is formed by the air baffle plate and the second inner surface; and

a heat sink.

2. The wireless charging device of claim 1, wherein the top plate has conductive traces laid therein for shielding electromagnetic interference.

3. The wireless charging device of claim 1, wherein the first inner surface is provided with a first fin, the first fin being a high thermal conductivity fin.

4. The wireless charging device of claim 1, wherein the second inner surface is provided with a second fin, the second fin being a high thermal conductivity fin.

5. The wireless charging device of claim 1, further comprising a base plate for covering the emitter drive plate disposed on the second exterior surface.

6. The wireless charging device of claim 5, wherein the hollow frame is a high thermal conductivity hollow frame, the top plate is a high thermal conductivity top plate, and the bottom plate is a high thermal conductivity bottom plate.

7. The wireless charging device of any of claims 1-6, wherein the hollow housing comprises first and second detachable housings, the first and second faces being located in the first and second housings, respectively.

8. The wireless charging device of claim 1, further comprising a boss disposed on the first outer surface and conforming to the top plate.

9. The wireless charging apparatus of any of claims 1-6, wherein the heat sink comprises a fan, and wherein an output airflow of the fan is blown out along the first air duct and the second air duct.

10. The wireless charging device of claim 9, wherein the heat sink further comprises a heat pipe disposed between the first outer surface and the transmitting coil.

11. The wireless charging device of claim 9, wherein the heat sink further comprises a thermoelectric cooler disposed between the top plate and the first outer surface.

12. The wireless charging device of claim 10, wherein the heat sink further comprises a thermoelectric cooler disposed between the top plate and the first outer surface, the thermoelectric cooler having a hot face that is in contact with the heat pipe.

13. The wireless charging device of claim 11, wherein the number of thermoelectric coolers is two, one at each of the first and second opposite ends of the first exterior surface.

14. The wireless charging device of claim 12, wherein the number of thermoelectric coolers is two, one at each of the first and second opposite ends of the first exterior surface.

15. The wireless charging device of any of claims 1-6, wherein the air barrier is a low thermal conductivity air barrier.

16. The wireless charging device of claim 1, wherein the air barrier is a plastic air barrier or a fiberglass epoxy air barrier.

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