CN113852144A

CN113852144A - Wireless charging device

Info

Publication number: CN113852144A
Application number: CN202010599589.7A
Authority: CN
Inventors: 张博; 黄犊子; 刘明艳; 霍恩光
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-12-28

Abstract

The present disclosure relates to a wireless charging device, including: a wireless charging coil; a thermoelectric cooler comprising a cooling surface; the heat conducting component is connected with the wireless charging coil and the refrigerating surface of the thermoelectric refrigerator; wherein the thermoelectric cooler and the heat conductive member do not overlap in a lamination direction of the wireless charging coil and the heat conductive member. This disclosure can effectively avoid thermoelectric cooler to cause the influence to the charge rate of wireless charging coil, can carry out high-efficient heat dissipation to wireless charging device again, improves charge rate.

Description

Wireless charging device

Technical Field

The present disclosure relates to the field of charging technology, and more particularly, to a wireless charging device.

Background

With the development of smart devices, wireless charging functions of smart devices are widely popularized, for example, mobile phones, tablets, bluetooth wireless headsets, etc. all have covered wireless charging functions.

In order to increase the charging rate of the smart device, the charging power of the wireless charging device in the related art is increased, and as a result, the operating temperature is increased in the charging process of the wireless charging device.

However, the charging rate of the wireless charging device is closely related to the operating temperature, and when the operating temperature of the wireless charging device is too high, the charging performance is affected, so that the charging time is increased, resulting in a poor charging rate.

Disclosure of Invention

In order to overcome the problem that the wireless charging device in the related art is poor in charging rate due to too high operating temperature, the present disclosure provides a wireless charging device, including: a wireless charging coil; a thermoelectric cooler comprising a cooling surface; the heat conducting component is connected with the wireless charging coil and the refrigerating surface of the thermoelectric refrigerator; wherein the thermoelectric cooler and the heat conductive member do not overlap in a lamination direction of the wireless charging coil and the heat conductive member.

In an embodiment, a first surface of the heat conducting member abuts against the wireless charging coil, and a second surface of the heat conducting member opposite to the first surface abuts against the refrigeration surface of the thermoelectric refrigerator.

In an embodiment, the first side of the thermal conductive member covers the wireless charging coil and the second side of the thermal conductive member covers the refrigeration side of the thermoelectric refrigerator.

In one embodiment, the wireless charging apparatus further comprises: a housing having a vent, the housing containing the wireless charging coil, the thermoelectric refrigerator, and the thermally conductive member; a fan disposed at the vent of the housing.

In one embodiment, the wireless charging apparatus further comprises: the heat dissipation component is abutted to a heating surface of the thermoelectric refrigerator, and the heating surface is opposite to the cooling surface.

In one embodiment, the air guiding opening of the fan faces the heat dissipation component.

In one embodiment, the air guiding opening of the fan faces the side of the heat dissipation component.

In one embodiment, the heat conducting member is any one of a graphite sheet, a heat conducting sheet made of a ceramic material, and a copper sheet.

In one embodiment, the fan is an axial fan.

In one embodiment, the fan is a centrifugal fan.

In one embodiment, the wireless charging apparatus further comprises: the base supports the shell, and the shell is arranged obliquely relative to the base.

In one embodiment, the wireless charging apparatus further comprises: the temperature sensor is used for sensing the temperature of the wireless charging coil and generating a temperature signal; a control circuit board electrically connected with the temperature sensor and the thermoelectric refrigerator for controlling the current of the thermoelectric refrigerator based on the temperature signal generated by the temperature sensor

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the radiating efficiency of the wireless charging coil can be greatly improved, and the charging rate is improved; avoid thermoelectric cooler and the electromagnetic induction interference that wireless charging coil superpose caused to and avoid the direct conduction of heat that thermoelectric cooler's the heating face produced to wireless charging coil, and influence the performance of charging, make wireless charging device's continuation charge rate also promote by a wide margin.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a perspective view illustrating a combined structure of a wireless charging apparatus and an electronic device according to an exemplary embodiment of the present disclosure.

Fig. 2 is a structural perspective view illustrating a wireless charging device according to an exemplary embodiment of the present disclosure.

Fig. 3 is a sectional view in a-a direction of the wireless charging apparatus of fig. 1 according to an exemplary embodiment of the present disclosure.

Fig. 4 is a schematic structural diagram in the B-B direction of fig. 3, shown in accordance with an exemplary embodiment of the present disclosure.

Fig. 5A to 5E are schematic configuration diagrams illustrating a partial structure in a wireless charging device according to an exemplary embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a wireless charging device according to another exemplary embodiment of the present disclosure.

Fig. 7 is a schematic structural view in the B-B direction of fig. 6, shown according to another exemplary embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram illustrating a wireless charging apparatus according to still another exemplary embodiment of the present disclosure.

Fig. 9 is a schematic structural view in a B-B direction in fig. 8, according to yet another exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Electronic devices in the related art, such as mobile phones, tablet computers, smartwatches, etc., are usually configured with a rechargeable battery, and when the rechargeable battery in the electronic device is insufficient, people charge the electronic device through a charger. However, a data transmission line is required to be provided for each of the conventional chargers, and when the charger is used, a plug of the charger is first inserted into an ac power outlet, and then a connector of the data transmission line is inserted into a charging interface of the electronic device, so that the electronic device charges an internal battery through the data transmission line.

However, in a wired charging mode, the connector of the data transmission line is frequently inserted into and pulled out of the charging interface, which is prone to wear the charging interface, or the charging interface enters foreign matters, which may cause poor contact or damage between the connector of the data transmission line and the contact of the charging interface, and thus normal charging cannot be performed.

Therefore, people develop the charging mode for the electronic equipment through wireless charging so as to avoid the problem that the joint of the data transmission line and the charging interface of the electronic equipment are damaged and cannot be normally connected for charging in a wired charging mode.

A related art wireless charging device generally includes a housing, a power cord, and a wireless charging coil. The power cord switch-on external power source for wireless charging coil provides electric power, and external power source's electric current flows in wireless charging coil via the power cord to make wireless charging coil produce electromagnetic induction.

As for an electronic device for obtaining electric energy wirelessly, the electronic device generally includes a housing, a wireless receiving coil located inside the housing, and a rechargeable battery electrically connected to the wireless receiving coil. When the battery power in the electronic equipment is insufficient, the electronic equipment is close to the wireless charging coil of the wireless charging device. Because the wireless charging coil generates electromagnetic induction, the wireless receiving coil in the electronic equipment generates electromagnetic induction current due to the fact that the wireless receiving coil is close to the wireless charging coil, and the battery is charged through the electromagnetic induction current generated by the wireless receiving coil.

Later, with the increasing capacity of batteries and the development of fast battery charging technology, it is more desirable to impart efficient charging effect to wireless charging devices. Generally, the charging rate of wireless charging is increased by increasing the charging power of the wireless receiving coil, however, the larger the power of the electromagnetic induction output coil is, the more serious the heat generation is, which results in that the charging rate of the wireless charging device is reduced or the charging cannot be continuously and stably carried out.

Further, with the development of semiconductor technology, it is assumed that heat is continuously radiated from an electromagnetic induction output coil in a wireless charging device by a thermoelectric cooler (TEC) and the electromagnetic induction output coil is cooled by heat transfer. Being wireless charging coil cooling in-process through the heat-conduction mode, thermoelectric cooler's refrigeration face is close to more and generates heat the source (wireless charging coil promptly), can obtain the heat-conduction effect of preferred more. Wherein, directly support the below in wireless charging coil with thermoelectric cooler's refrigeration face, thermoelectric cooler and the wireless charging coil superpose promptly and place so that the mode of refrigeration face direct contact, can obtain the conduction effect of preferred in theory, however, the mode of superpose configuration has following problem:

on the one hand, the heat energy that thermoelectric refrigerator's heating face self produced is because of the superpose configuration direct conduction to wireless charging coil, and when the temperature was too high, the protection circuit who is connected with wireless charging coil electricity took the mode that reduces the charging power (electric current) of wireless charging coil or the disconnection power supply, reduces the temperature of wireless charging coil and burns out the device in order to avoid the high temperature, leads to the charge duration extension, and wireless charge rate reduces or can not continuously charge, is unfavorable for the promotion of charge rate on the contrary.

On the other hand, the current of the thermoelectric refrigerator during operation and the properties of the semiconductor material cause interference to the magnetic field of the wireless charging coil, which results in a decrease in charging performance and a deterioration in continuous charging rate.

In view of this, this disclosure provides a wireless charging device, can avoid wireless charging coil and thermoelectric refrigerator to overlap each other, and the problem that the rate of charging is poor that leads to this disclosed wireless charging device can carry out high-efficient heat dissipation to wireless charging coil, and then can improve charge rate.

Fig. 1 is a perspective view illustrating a combined structure of a wireless charging apparatus and an electronic device according to an exemplary embodiment of the present disclosure. Fig. 2 is a perspective view of a wireless charging device shown in accordance with an exemplary embodiment of the present disclosure.

Referring to fig. 1 and 2, the wireless charging apparatus 100 of the embodiment of the present disclosure is used for wirelessly charging an electronic device 200 in proximity to or in contact with the wireless charging apparatus. The electronic device 200 includes a wireless receiving coil 210 and a rechargeable battery 220 electrically connected to the wireless receiving coil 210.

The wireless charging coil 110 in the wireless charging device 100 obtains power from an external power source through the power connection line 180. The current of the external power source flows into the wireless charging coil 110 through the power connection line 180, so that the wireless charging coil 110 generates electromagnetic induction.

When the battery 220 in the electronic device 200 is short of power, the electronic device 200 is brought close to or in contact with the wireless charging coil 110 of the wireless charging device 100, and the wireless charging coil 110 generates electromagnetic induction, so that the wireless receiving coil 210 in the electronic device 200 can generate electromagnetic induction current due to the proximity to the wireless charging coil 110, and the battery 220 can be charged.

The electronic device 200 may be a smart device having a wireless receiving coil 210, such as a smart phone, a tablet computer, a smart wearable device, or a camera. The wireless charging device 100 may be of a vertical type or a horizontal type, such as an L-shaped standing seat type or a horizontal lying type. The shape may be circular, square, rectangular, or other shapes, and the present disclosure does not limit the external shape of the wireless charging device 100.

The embodiment of the present disclosure takes the stand-type wireless charging device 100 and the mobile phone as the electronic device 200 to be charged as an example, but the present disclosure is not limited thereto.

Referring to fig. 1 to 3, a wireless charging device 100 provided by the embodiment of the present disclosure includes a wireless charging coil 110, a thermoelectric refrigerator 120, and a heat conductive member 130. The wireless charging device 100 further includes a housing 140 and a base 150 supporting the housing 140.

The housing 140 is used to provide space for the wireless charging coil 110, the thermoelectric cooler 120, and the heat conducting member 130 to be installed and configured, and to protect them. The upper surface of the case 140 serves to support the electronic device 200 to be charged. When the power of the battery 220 in the electronic device 200 is insufficient, the electronic device 200 is placed on the upper surface of the housing 140, so that the wireless receiving coil 210 in the electronic device 200 is close to the wireless charging coil 110 in the housing 140, and the electronic device 200 is wirelessly charged through electromagnetic induction.

The base 150 is horizontally disposed, and the housing 140 is disposed obliquely with respect to the base 150, so as to facilitate the taking and placing of the electronic device 200. The inclination angle may be 60 degrees, but the present disclosure is not limited thereto. The base 150 and the housing 140 may be integrally formed or pivotally connected, and the pivotal connection facilitates adjustment of the charging angle of the housing 140, thereby improving operability of the electronic device 200 during charging. The base 150 and the housing 140 may be made of plastic or glass, such as high-density plastic or toughened glass.

During charging, in order to keep the electronic device 200 stable, the wireless receiving coil 210 and the wireless charging coil 13 in the housing 140 obtain a more stable induction range, and the stability of wireless charging is maintained. A protruding stopping part 170 is further provided on the base 150 to prevent the electronic device 200 placed on the upper surface of the housing 140 from sliding down due to the inclined arrangement of the housing 140. However, the disclosure is not limited thereto, and a recess may be disposed at a connection position of the base 150 close to the housing 140, so that the electronic device 200, such as a mobile phone, may be inserted into the recess to maintain stability during charging. In addition, the base 150 is further provided with an indicator light 160 for displaying the operating state and a power connection line 180 for connecting an external power source, and the power connection line 180 is connected to supply power to the devices inside the housing 140.

Referring to fig. 1 to 3, the wireless charging coil 110 is used to be electrically connected with an external power source to obtain power to generate electromagnetic induction. For example, the wireless charging coil 110 obtains power of an external power source through the power connection line 180, and current of the external power source flows into the wireless charging coil 110 through the power connection line to generate electromagnetic induction. When the wireless receiving coil 210 in the electronic device 200 approaches or contacts the wireless charging coil 110 of the wireless charging device 100, the wireless charging coil 110 generates electromagnetic induction, so that the induction receiving coil 210 generates induction current, and the battery 220 in the electronic device 200 is charged by the induction current.

In one example, the wireless charging coil 110 may be formed by one electromagnetic induction transmitting coil, or may be formed by a plurality of electromagnetic induction transmitting coils arranged, so as to extend the electromagnetic induction range of the wireless charging coil 110 and improve the adaptability to electronic devices 200 with different specifications and sizes. For example, the wireless charging coil 110 may include a first electromagnetic induction transmitting coil (not shown) and a second electromagnetic induction transmitting coil (not shown) that are disposed side by side, and a third electromagnetic induction coil (not shown) that is stacked between the first electromagnetic induction transmitting coil and the second electromagnetic induction transmitting coil, but the configuration of the wireless charging coil 110 of the present disclosure is not limited thereto.

The thermoelectric cooler 120, i.e., a semiconductor cooling chip (TEC), includes a cooling surface and a heating surface, and the heating surface is opposite to the cooling surface. The thermoelectric cooler 120 is configured to be electrically connected to a power source to draw current, which generates heat to flow from the cooling side to the heating side to maintain the cooling side of the TEC at a substantially constant low temperature.

A first surface of the heat conductive member 130 abuts against the wireless charging coil 110, and a second surface of the heat conductive member 130 opposite to the first surface abuts against a cooling surface of the thermoelectric refrigerator 120. That is, the heat conductive member 130 is connected to the wireless charging coil 110 and the cooling surface of the thermoelectric cooler 120. The heat conductive member 130 serves to transfer heat generated by the wireless charging coil 110 to the cooling surface of the thermoelectric cooler 120. Wherein, the wireless charging coil 110 and the thermoelectric refrigerator 120 do not overlap in the lamination direction of the wireless charging coil 110 and the heat conductive member 130.

When the wireless charging device 100 of the embodiment of the present disclosure works, the current of the external power source passes through the wireless charging coil 110, the wireless charging coil 110 generates heat energy, and the heat energy is transferred to the refrigeration surface of the thermoelectric refrigerator 120 via the heat conducting component 130, so that the temperature of the wireless charging coil 110 can be continuously reduced, and the heat dissipation efficiency is greatly improved. In addition, wireless charging coil 110 and thermoelectric refrigerator 120 are arranged in a non-overlapping manner, so that the current of thermoelectric refrigerator 120 and the property of the semiconductor material can be prevented from interfering with the electromagnetic induction of wireless charging coil 110. Meanwhile, the direct heat transfer of the heat generated from the heating surface of the thermoelectric refrigerator 20 itself to the wireless charging coil 110 is also prevented. Therefore, the wireless charging device 100 is enabled to maintain stable charging performance, and an efficient charging rate.

In one embodiment, a first surface of the heat conducting member 130 abuts against the wireless charging coil 110, and a second surface of the heat conducting member 130 opposite to the first surface abuts against a cooling surface of the thermoelectric cooler 120. The first surface faces the surface of the wireless charging coil 110 far away from the electronic device 200, that is, the first surface is the surface close to the electronic device 200.

The heat conducting part 130 is in surface contact with the refrigeration surfaces of the wireless charging coil 110 and the thermoelectric refrigerator 120, so that the heat transfer area can be increased, the heat dissipation speed of the wireless charging coil can be increased, and the charging rate is increased. The heat-conducting member 30 may be a graphite sheet, graphene, a heat-conducting sheet made of a ceramic material, a copper sheet, or the like, wherein the heat-conducting sheet made of a ceramic material may be an alumina ceramic heat-conducting sheet, an aluminum nitride ceramic heat-conducting sheet. The present disclosure is not so limited.

In one example, the cooling surfaces of the wireless charging coil 110 and the thermoelectric cooler 120 may simultaneously contact the first surface of the heat conductive member 30.

In another example, a first side of heat conducting member 130 covers wireless charging coil 110 and a second side of heat conducting member 130 covers the cooling side of thermoelectric cooler 120. The contact area of heat-conducting component 130 and wireless charging coil 110 and the refrigeration face is further increased for wireless charging coil 110's radiating rate is faster, and charge rate further promotes.

The following description is not intended to be exhaustive, but rather, to describe the relative position of wireless charging coil 110 and thermoelectric cooler 120 on thermal conductive member 130. Fig. 5A to 5E are schematic diagrams illustrating different configurations of partial structures in a wireless charging device according to an exemplary embodiment of the disclosure.

In an embodiment, referring to fig. 5A, the wireless charging coil 110 abuts against an upper portion of the first surface of the heat conducting member 130, and the cooling surface of the thermoelectric refrigerator 120 abuts against a lower portion of the second surface of the heat conducting member 130, that is, the cooling surface of the thermoelectric refrigerator 120 is located below the wireless charging coil 110.

In another embodiment, referring to fig. 5B, the wireless charging coil 110 abuts against the lower portion of the first surface of the heat conducting member 130, and the thermoelectric refrigerator 120 abuts against the upper portion of the second surface of the heat conducting member 130, that is, the cooling surface of the thermoelectric refrigerator 120 is located above the wireless charging coil 110.

In yet another embodiment, referring to fig. 5C and 5D, the wireless charging coil 110 abuts against the left side of the first surface of the heat conductive member 130, and the thermoelectric cooler 120 abuts against the right side of the second surface of the heat conductive member 130, or the wireless charging coil 110 abuts against the right side of the first surface of the heat conductive member 130, and the thermoelectric cooler 120 abuts against the left side of the second surface of the heat conductive member 130.

In another embodiment, referring to fig. 5E, the wireless charging coil 110 abuts against the middle of the first surface of the heat conducting member 130, and the cooling surfaces of the thermoelectric coolers 120 all abut against the second surface of the heat conducting member 130 along the circumferential direction of the wireless charging coil 110. The heat that wireless charging coil 110 produced dispels the heat to a plurality of refrigeration faces of a plurality of thermoelectric refrigerator 120 via heat-conducting component 130 heat-conduction, can improve the radiating efficiency to wireless charging coil 110 for charge rate promotes by a wide margin. Although four thermoelectric coolers 120 are shown in fig. 7, the present disclosure is not so limited.

In some embodiments, referring to fig. 3, the wireless charging device 100 of the embodiments of the present disclosure further includes a housing 140 having a vent 141 and a fan 180 disposed at the vent 141 of the housing 140. The heat inside the case 140 is discharged to the outside of the case 140 by the fan 180 or the cold air outside the case 140 is delivered to the inside of the case 140, and the heat generated inside the case 140 is actively and forcibly dissipated by means of the external cold air, so that the wireless charging device 100 can efficiently dissipate the heat.

In one example, a plurality of ventilation openings 141 may be disposed on the housing 110, and convection may be formed among the ventilation openings 141, so as to facilitate rapid dissipation of heat inside the housing 140 to the outside of the housing 140, thereby maintaining a normal operating temperature of the wireless charging device 100 and stable charging performance.

In another example, a plurality of fans 180 may be disposed at the plurality of ventilation openings 141 of the housing 140, respectively, to increase an air exhaust or air supply area inside the housing 140, and increase a convection speed of air inside the housing, so as to rapidly cool the wireless charging coil 110 and the thermoelectric refrigerator 120 inside the housing 140.

In an embodiment, the wireless charging device 100 further includes a heat dissipation member 190, and the heat dissipation member 190 abuts against the heating surface of the thermoelectric cooler 120. The heat generated by the wireless charging coil 110 is transferred to the cooling surface of the thermoelectric refrigerator 120 through the heat conducting member 120, the cooling surface of the thermoelectric refrigerator 120 continuously cools the wireless charging coil 110, the heat generated by the heating surface of the thermoelectric refrigerator 120 is transferred to the heat radiating member 190, and the heat transferred to the heat radiating member 190 is sufficiently absorbed by the heat radiating member.

Through the setting of heat dissipation part 190 for the heat that the heating face self of thermoelectric cooler 120 produced is fully absorbed by heat dissipation part 190, reduces thermoelectric cooler 120 self heat to the influence of wireless charging coil, further promotes the radiating efficiency, thereby promotes charging performance. The heat dissipation member 190 may be any one of a copper heat dissipation fin, a copper-aluminum combined heat dissipation fin, a heat pipe heat dissipation fin, and a graphite heat dissipation fin.

Fig. 4 is a schematic structural diagram in the B-B direction of fig. 3, shown in accordance with an exemplary embodiment of the present disclosure. In one embodiment, referring to fig. 3 and 4, the air guiding opening of the fan 180 faces the heat dissipating member 190, i.e., the surface facing the heat dissipating member 190 away from the heating surface of the thermoelectric cooler 120. The fan 180 directly blows air or discharges air to the heat dissipating member 190, and discharges heat absorbed by the heat dissipating member 190 to the outside of the case 140, or directly blows external cold air to the heat dissipating member 190, thereby cooling the heat dissipating member 190. The heat dissipation part 120 is directly dissipated through the fan 180, so that the heating surface of the thermoelectric refrigerator 120 can rapidly dissipate heat, the heat conduction rate of the wireless charging coil 110 is further improved, and the charging rate is further improved. The fan can be an axial flow fan, and the vertical airflow of the axial flow fan is used for directly supplying or exhausting air to the radiating fins.

Fig. 8 is a schematic structural diagram illustrating a wireless charging apparatus according to still another exemplary embodiment of the present disclosure. Fig. 9 is a schematic structural view in a B-B direction in fig. 8, according to yet another exemplary embodiment of the present disclosure. Referring to fig. 8 and 9, in another embodiment, the air guiding opening of the fan 180 may also directly face the heating surface of the thermoelectric cooler 120. The fan 180 blows air or guides the air directly to the heating surface of the thermoelectric refrigerator 120 to cool the thermoelectric refrigerator 120.

In another example, the heat dissipation member 190 may be in contact with the second surface of the heat conductive member 130 and located at a side of the thermoelectric cooler 120. That is, the heat dissipation member 190 is disposed facing the wireless charging coil 110 so that the heat dissipation member 10 can absorb heat generated from the wireless charging coil 110 and heat generated from the heating surface of the thermoelectric refrigerator 120 at the same time. In addition, such an arrangement is advantageous for thinning the housing 140. In this embodiment, the fan 180 may be added so that the air guide opening of the fan 180 faces the heat dissipation member 190, thereby cooling the heat dissipation member.

Fig. 6 is a schematic structural diagram of a wireless charging device according to another exemplary embodiment of the present disclosure. Fig. 7 is a schematic structural view in the B-B direction of fig. 6, shown according to another exemplary embodiment of the present disclosure. Referring to fig. 6 and 7, in an embodiment, the air guiding opening of the fan 180 faces the side of the heat dissipation member 190, and radiates heat to the heating surface of the thermoelectric refrigerator 120 by side air discharge or side air supply. The fan 50 may be a centrifugal fan, and compared with the arrangement manner (shown in fig. 3) in which the air guide opening of the fan 180 faces the heat dissipation member 190 in the above embodiment, the thickness of the housing 10 can be reduced while the temperature of the wireless charging device 100 is effectively reduced.

In one embodiment, the wireless charging device 100 further includes a temperature sensor (not shown) and a control circuit board (not shown). The temperature sensor is disposed in the housing 140 and is used for sensing the temperature of the wireless charging coil 110 and generating a temperature signal. The control circuit board may be disposed in the base 150, electrically connected to the temperature sensor and the thermoelectric refrigerator 120, and configured to control a current of the thermoelectric refrigerator 120 based on a temperature signal generated by the temperature sensor, so as to adjust a cooling efficiency of a cooling surface of the thermoelectric refrigerator 120, so that the wireless charging device 100 can maintain a stable operating temperature.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless charging device, comprising:

a wireless charging coil;

a thermoelectric cooler comprising a cooling surface; and

the heat conducting component is connected with the wireless charging coil and the refrigerating surface of the thermoelectric refrigerator;

wherein the thermoelectric cooler and the heat conductive member do not overlap in a lamination direction of the wireless charging coil and the heat conductive member.

2. The wireless charging apparatus of claim 1,

the first surface of the heat conducting component is abutted against the wireless charging coil,

and a second surface of the heat conducting component opposite to the first surface is abutted to the refrigerating surface of the thermoelectric refrigerator.

3. The wireless charging apparatus of claim 2,

the first side of the thermally conductive member covers the wireless charging coil,

the second face of the thermally conductive member covers the refrigerated face of the thermoelectric cooler.

4. The wireless charging apparatus of claim 1, further comprising:

a housing having a vent, the housing containing the wireless charging coil, the thermoelectric refrigerator, and the thermally conductive member;

a fan disposed at the vent of the housing.

5. The wireless charging apparatus of claim 4, further comprising:

the heat dissipation component is abutted to a heating surface of the thermoelectric refrigerator, and the heating surface is opposite to the cooling surface.

6. The wireless charging apparatus according to claim 4 or 5,

and the air guide port of the fan faces to the heating surface of the thermoelectric refrigerator.

7. The wireless charging apparatus of claim 5,

the air guide opening of the fan faces to the side surface of the heat dissipation component.

8. The wireless charging apparatus of claim 1,

the heat conducting component is any one of a graphite sheet, a heat conducting sheet made of ceramic materials and a copper sheet.

9. The wireless charging apparatus of claim 6,

the fan is an axial fan.

10. The wireless charging apparatus of claim 7,

the fan is a centrifugal fan.

11. The wireless charging apparatus of claim 4, further comprising:

a base body supporting the housing,

the shell is obliquely arranged relative to the base body.

12. The wireless charging apparatus of claim 1, further comprising:

the temperature sensor is used for sensing the temperature of the wireless charging coil and generating a temperature signal;

a control circuit board electrically connected with the temperature sensor and the thermoelectric refrigerator for controlling the current of the thermoelectric refrigerator based on the temperature signal generated by the temperature sensor.