Patent Publication Number: US-2022217866-A1

Title: Wireless charging base

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/CN 2020/094216, filed on Jun. 3, 2020, which claims priority to Chinese Patent Application No. 201921891897.6, filed on Nov. 5, 2019. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     Embodiments of this application relate to the field of wireless charging technologies, and in particular, to a wireless charging base. 
     BACKGROUND 
     With advances in science and technology, an increasing quantity of electronic devices currently support wireless charging. However, a heat dissipation capability of a wireless charger directly affects charging power and a charging speed. In existing wireless charging, heat of the wireless charger is usually dissipated naturally or by using one fan. In a charging process, heat of the electronic device is mainly dissipated naturally. Because the natural heat dissipation is relatively slow and greatly limits the charging speed, a manner of active heat dissipation needs to be added to the electronic device to improve wireless charging performance. 
     SUMMARY 
     To overcome the foregoing problem, embodiments of this application provide a wireless charging base. 
     To achieve the foregoing objectives, the following technical solutions are used in the embodiments of this application. 
     According to a first aspect, this application provides a wireless charging base, including a charging panel, a first base plate, and a second base plate. 
     The charging panel is configured to charge an electronic device, and the charging panel includes a first air vent and a second air vent. 
     The first air vent is disposed on a lower surface of the charging panel, and the lower surface is a surface opposite to a surface that is in contact with the charging panel when the electronic device is being charged. 
     The second air vent is disposed on a side surface around the charging panel. An air duct exists between the first air vent and the second air vent. 
     The first base plate is disposed on an upper surface of the charging panel, is located at an end of the charging panel, and is configured to support the electronic device when the electronic device is being charged. The upper surface is the surface that is in contact with the charging panel when the electronic device is being charged, and the first base plate includes a third air vent. 
     The third air vent is disposed on a first surface of the first base plate, and the first surface of the first base plate is a surface that is of the first base plate and that is close to the second air vent. 
     The second base plate is disposed on the lower surface of the charging panel, is located at the same end as the first base plate, and is configured to support the charging panel, and the second base plate includes a fourth air vent. 
     The fourth air vent is disposed on a first surface of the second base plate, and the first surface of the second base plate is a surface that is of the second base plate and that is close to the charging panel. An air duct exists between the third air vent and the fourth air vent. 
     According to the wireless charging base provided in this embodiment of this application, two air vents are disposed on the charging panel, so that an air flow flows through an air duct between the two air vents, to cool a circuit inside the charging panel. Two air vents are separately disposed on the two base plates, so that an air flow flows through an air duct between the two air vents, to cool the electronic device that is being charged. 
     In another possible implementation, the wireless charging base further includes at least one first fan and at least one second fan. 
     The at least one first fan is disposed inside the charging panel, and is configured to suck air into the inside of the charging panel from one of the first air vent and the second air vent, and a formed air flow flows out from the other air vent in the first air vent and the second air vent. The at least one second fan is disposed inside the second base plate, and is configured to suck air into the inside of the first base plate and the second base plate from one of the third air vent and the fourth air vent, and a formed air flow flows out from the other air vent in the third air vent and the fourth air vent. 
     In this application, fans are disposed inside the charging panel and the base plate, so that air flows are formed in an air duct between two air vents on the charging panel and an air duct between two air vents on the two base plates, and flow in the air ducts. 
     In another possible implementation, the wireless charging base further includes a first clamp and a second clamp. 
     The first clamp and the second clamp are disposed on side edges around the charging panel, the charging panel is located between the first clamp and the second clamp, and the first clamp and the second clamp are configured to fasten the electronic device to the charging panel when the electronic device is being charged. 
     The two clamps provided in this embodiment of this application fasten the electronic device to the charging panel and prevent the electronic device from falling down when the electronic device rests on the charging panel and is being charged. 
     In another possible implementation, the wireless charging base includes a fifth air vent and a sixth air vent. 
     The fifth air vent is disposed on a surface that is of the first clamp and that is opposite to the second clamp. 
     The sixth air vent is disposed on a surface that is of the second clamp and that is opposite to the first clamp. 
     Air ducts exist between each of the fifth air vent and the sixth air vent and both the first air vent and the second air vent. 
     In this embodiment of this application, an air vent is disposed on the clamp, an air duct is formed between the air vent and another air vent, and when an air flow flows through the air duct between the two air vents, the electronic device that is being charged is cooled. 
     In another possible implementation, at least two protrusions are disposed on each of opposite surfaces of the first clamp and the second clamp, and are configured to form air ducts between the electronic device and the opposite surfaces of the first clamp and the second clamp when the electronic device is being charged. 
     In this embodiment of this application, protrusions are disposed on the opposite surfaces of the clamps, to prevent the clamps from blocking air vents on the surfaces when the electronic device is fastened, and to form air ducts between the clamps and the electronic device. When air flows flow through the air ducts, the electronic device that is being charged is cooled. 
     In another possible implementation, the charging panel further includes a seventh air vent. 
     The seventh air vent is disposed on the upper surface of the charging panel, where air ducts exist between the seventh air vent and the first air vent and between the seventh air vent and the second air vent. 
     In this embodiment of this application, an air vent is disposed on the surface that is of the charging panel and that is in contact with the electronic device that is being charged, an air duct is formed between the air vent and another air vent, and when an air flow flows through the air duct, the electronic device that is being charged is cooled. 
     In another possible implementation, at least two protrusions are disposed on the upper surface of the charging panel, and are configured to form an air duct between the electronic device and the upper surface of the charging panel when the electronic device is being charged. 
     In this embodiment of this application, the protrusions are disposed on the surface that is of the charging panel and that is in contact with the electronic device that is being charged, to prevent the electronic device from resting on the charging panel and blocking an air vent on the surface, and to form an air duct between the charging panel and the electronic device. When an air flow flows through the air duct, the electronic device that is being charged is cooled. 
     In another possible implementation, at least two protrusions are disposed on the first surface of the first base plate, and are configured to form an air duct between the electronic device and the first surface of the first base plate when the electronic device is being charged 
     In this embodiment of this application, protrusions are disposed on a side surface of a side that is of the first base plate and that is close to the second air vent, to prevent the electronic device from being placed on the first base plate and the charging panel and blocking an air vent on the surface, and to form an air duct between the first base plate and the electronic device. When an air flow flows through the air duct, the electronic device that is being charged is cooled. 
     In another possible implementation, an included angle between the first base plate and the charging panel is 90 degrees. 
     According to a second aspect, an embodiment of this application further provides a wireless charging base, including a charging panel and a first base plate. 
     The charging panel is configured to charge an electronic device, and the charging panel includes a first air vent. 
     The first air vent is disposed on a side surface around the charging panel. 
     The first base plate is disposed on a side surface around the charging panel, and is configured to support the electronic device when the electronic device is being charged, and the first base plate includes a second air vent. 
     The second air vent is disposed on a first surface of the first base plate, and the first surface is a surface that is of the first base plate and that is close to the charging panel. An air duct exists between the first air vent and the second air vent. 
     According to the wireless charging base provided in this embodiment of this application, an air vent is disposed on each of the charging panel and the base plate, so that an air flow flows through an air duct between the two air vents, to cool a circuit inside the charging panel and the electronic device that is being charged. 
     In another possible implementation, the wireless charging base further includes at least one fan. 
     The at least one fan is disposed inside the charging panel, and is configured to suck air into the inside of the charging panel from one of the first air vent and the second air vent. A formed air flow flows out from the other air vent in the first air vent and the second air vent. 
     In this application, a fan is disposed inside the charging panel, so that an air flow is formed in an air duct between two air vents on the charging panel, and flows in the air duct. 
     In another possible implementation, the wireless charging base further includes a first clamp and a second clamp. 
     The first clamp and the second clamp are disposed on side surfaces around the charging panel, the charging panel is located between the first clamp and the second clamp, and the first clamp and the second clamp are configured to fasten the electronic device to the charging panel when the electronic device is being charged. 
     The two clamps provided in this embodiment of this application fasten the electronic device to the charging panel and prevent the electronic device from falling down when the electronic device rests on the charging panel and is being charged. 
     In another possible implementation, the wireless charging base further includes a third air vent and a fourth air vent. 
     The third air vent is disposed on a surface that is of the first clamp and that is opposite to the second clamp. 
     The fourth air vent is disposed on a surface that is of the second clamp and that is opposite to the first clamp. Air ducts exist between each of the third air vent and the fourth air vent and both the first air vent and the second air vent 
     In this embodiment of this application, an air vent is disposed on the clamp, an air duct is formed between the air vent and another air vent, and when an air flow flows through the air duct between the two air vents, the electronic device that is being charged is cooled. 
     In another possible implementation, at least two protrusions are disposed on each of opposite surfaces of the first clamp and the second clamp, and are configured to form air ducts between the electronic device and the opposite surfaces of the first clamp and the second clamp when the electronic device is being charged. 
     In this embodiment of this application, protrusions are disposed on the opposite surfaces of the clamps, to prevent the clamps from blocking air vents on the surfaces when the electronic device is fastened, and to form air ducts between the clamps and the electronic device. When air flows flow through the air ducts, the electronic device that is being charged is cooled. 
     In another possible implementation, the charging panel further includes a fifth air vent. 
     The fifth air vent is disposed on an upper surface of the charging panel, and the upper surface is a surface that is in contact with the charging panel when the electronic device is being charged, where air ducts exist between the fifth air vent and the first air vent and between the fifth air vent and the second air vent. 
     In this embodiment of this application, an air vent is disposed on the surface that is of the charging panel and that is in contact with the electronic device that is being charged, an air duct is formed between the air vent and another air vent, and when an air flow flows through the air duct, the electronic device that is being charged is cooled. 
     In another possible implementation, at least two protrusions are disposed on the upper surface of the charging panel, and are configured to form an air duct between the electronic device and the upper surface of the charging panel when the electronic device is being charged. 
     In this embodiment of this application, the protrusions are disposed on the surface that is of the charging panel and that is in contact with the electronic device that is being charged, to prevent the electronic device from resting on the charging panel and blocking an air vent on the surface, and to form an air duct between the charging panel and the electronic device. When an air flow flows through the air duct, the electronic device that is being charged is cooled. 
     In another possible implementation, at least two protrusions are disposed on the first surface of the first base plate, and are configured to form an air duct between the electronic device and the first surface of the first base plate when the electronic device is being charged 
     In this embodiment of this application, protrusions are disposed on a side surface of a side that is of the first base plate and that is close to the charging panel, to prevent the electronic device from being placed on the first base plate and the charging panel and blocking an air vent on the surface, and to form an air duct between the first base plate and the electronic device. When an air flow flows through the air duct, the electronic device that is being charged is cooled. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The following briefly describes the accompanying drawings used in describing the embodiments or the conventional technology. 
         FIG. 1  is a schematic diagram of a front-view structure of a wireless charging base according to an embodiment of this application; 
         FIG. 2  is a schematic diagram of a rear-view structure of a wireless charging base according to an embodiment of this application; 
         FIG. 3  is a schematic diagram of an air flow direction in a side view of a wireless charging base according to an embodiment of this application; 
         FIG. 4  is a schematic diagram of an air flow direction in a front view of a wireless charging base according to an embodiment of this application; 
         FIG. 5( a )  and  FIG. 5( b )  are a schematic diagram of a structure of a clamp according to an embodiment of this application; 
         FIG. 6  is a schematic diagram of a front-view structure of a wireless charging base according to an embodiment of this application; 
         FIG. 7  is a schematic diagram of an internal cross-sectional structure of a wireless charging base according to an embodiment of this application; 
         FIG. 8  is a schematic diagram of an air flow direction in a front view of a wireless charging base according to an embodiment of this application; and 
         FIG. 9  is a schematic diagram of an air flow direction in an internal cross section of a wireless charging base according to an embodiment of this application. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. 
     In descriptions of this application, locations or location relationships indicated by terms “center”, “up”, “down”, “in front of”, “behind”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, and the like are based on locations or location relationships shown in the accompanying drawings, and are merely intended for ease of describing this application and simplifying descriptions, instead of indicating or implying that a mentioned apparatus or component needs to be provided on a specific location or constructed and operated on a specific location, and therefore shall not be understood as limitations on this application. 
     In the descriptions of this application, it should be noted that, unless otherwise clearly specified and limited, terms “mount”, “link”, and “connect” should be understood in a broad sense, for example, may mean a fixed connection, may be a detachable connection, or may be a butt joint connection or an integrated connection. Persons of ordinary skill in the art can understand specific meanings of the foregoing terms in this application based on specific cases. 
     A wireless charging base provided in the embodiments of this application is configured to charge an electronic device. The electronic device may be a mobile phone, a tablet computer, a desktop computer, an ultra-mobile personal computer (UMPC), a handheld computer, a netbook, a personal digital assistant (PDA), a wearable electronic device, a virtual reality device, or the like. This is not limited in the embodiments of this application. The following uses an example in which the electronic device is a mobile phone. 
       FIG. 1  and  FIG. 2  are schematic diagrams of structures of a wireless charging base according to an embodiment of this application. 
     As shown in the figure, the wireless charging base provided in this embodiment of this application includes a charging panel  11 , a base plate  12 , and a base plate  13 . 
     A wireless charging circuit (not shown in the figure) is disposed inside the charging panel  11 , and is configured to charge a mobile phone when the mobile phone is close to the charging panel  11 . A shape of the charging panel  11  is not limited to a cuboid shown in  FIG. 1  and  FIG. 2 , and may be various shapes such as a cylinder and a cube that are common in a current market. 
     In this embodiment of this application, a fan  151  is disposed inside the charging panel  11 . The charging panel  11  includes at least two air vents. An air vent  111  is located on a surface (for ease of subsequent description, the surface is referred to as a “lower surface”, and a surface that is in contact with the mobile phone when the charging panel performs charging is referred to as an “upper surface”) that is of the charging panel  11  and that is opposite to the surface in contact with the mobile phone when the charging panel  11  performs charging, and an air vent  112  is located on a side surface around the charging panel  11 . 
     When the fan  151  operates, one of the air vent  111  and the air vent  112  provides air for the fan  151  as an air intake vent, and the other air vent in the air vent  111  and the air vent  112  exhausts air for the fan  151  as an air exhaust vent. Because an internal temperature of the charging panel  11  becomes increasingly higher when the charging panel  11  charges the mobile phone, in this application, the fan  151  is disposed inside the charging panel  11 , to cool the charging panel  11  when the charging panel  11  operates. 
     Preferably, in this embodiment of this application, the air vent  111  is used as an air intake vent, and the air vent  112  is used as an air exhaust vent. After air enters the fan  151  inside the charging panel  11  through the air vent  111 , an air flow is formed and flows out from the air vent  112 , as shown by directions of arrows shown in  FIG. 3 . 
     It should be specially noted that  FIG. 2  shows the example in which the air vent  111  is used as an air intake vent and the air vent  112  is used as an air exhaust vent. As mentioned in this application, there is a wireless charging circuit in the charging panel  11 , and the fan mainly cools the circuit. Therefore, the circuit may be disposed between the fan  151  and the air vent  112 , so that a wind flow formed when the fan  151  operates passes through the circuit, to achieve a cooling effect. 
     In this embodiment of this application, a type, a model, and the like of the fan  151  are not limited. A size of the fan  151  needs to be small, so that the fan  151  is installed inside the charging panel  11 , without increasing an overall volume of the wireless charging base. A quantity of fans  151  is not limited, either, and is selected as actually required. 
     In this embodiment of this application, the air vent  111  is most preferably located near the fan  151  on the lower surface of the charging panel  11 , to better provide air or exhaust air for the fan  151 . A shape of the air vent  111  may be a spiderweb-like shape shown in  FIG. 2 , or may be a matrix shape formed by a plurality of circular holes. This is not limited in this embodiment of this application. 
     In addition, a shape of the air vent  112  may be a circular hole that has a relatively large radius and that is shown in  FIG. 1 , or may be a spiderweb-like shape, a matrix shape formed by a plurality of circular holes, or the like. This is not limited in this embodiment of this application, either. 
     In a feasible embodiment, an air vent  113  is disposed on the upper surface of the charging panel  11 . The air vent  113  is most preferably located near the fan  151  on the upper surface of the charging panel  11 , so that an air flow blown out when the fan  151  operates better flows out from the air vent  113 , as shown by directions of arrows shown in  FIG. 3  and  FIG. 4 , to cool the mobile phone that is being charged. A shape of the air vent  113  may be a circular hole that has a relatively large radius and that is shown in  FIG. 1 , or may be a spiderweb-like shape, a matrix shape formed by a plurality of circular holes, or the like. This is not limited in this embodiment of this application, either. 
     In a feasible embodiment, at least two protrusions are disposed at a center position of the upper surface of the charging panel  11 , and are configured to form an air duct between the mobile phone and the upper surface of the charging panel  11  when the mobile phone is close to the charging panel  11  and being charged, to avoid a temperature rise caused when the mobile phone and the upper surface of the charging panel  11  are closely attached, and make, when the air vent  113  is disposed on the upper surface of the charging panel  11 , it convenient for an air flow to flow out from the air vent  113 , to cool the mobile phone that is being charged. A shape formed by the plurality of protrusions is not limited to a circle shown in  FIG. 1 , and may be any pattern such as a rectangle or a star. This is not limited in this embodiment of this application, either. 
     The wireless charging base provided in this embodiment of this application further includes two clamps  14 . The two clamps  14  are separately disposed on side surfaces around the charging panel  11 , so that the charging panel  11  is located between the two clamps  14 , and the two clamps  14  are configured to fasten the mobile phone on which wireless charging is being performed. In this embodiment of this application, air vents  141  are disposed on opposite surfaces of the two clamps  14 , and the inside of the clamp  14  is disposed as a hollow structure or an air duct (not shown in the figure) is disposed inside the clamp  14 . The hollow structure or the air duct is connected to the inside of the charging panel  11 , so that after being directed to the hollow structure or the air duct, an air flow blown out by the fan  151  flows out through the air vent  141 , as shown by the directions of the arrows shown in  FIG. 3 , to cool the mobile phone that is being charged. 
     A shape of the air vent  141  is not limited to a matrix shape formed by a plurality of circular holes shown in  FIG. 1 , and may be a matrix shape formed by a plurality of parallel rectangular holes, a matrix shape formed by a plurality of square holes, or the like. This is not limited in this embodiment of this application. 
     In a feasible embodiment, at least two protrusions are disposed on each of opposite surfaces of the two clamps  14 , and are configured to form air ducts between the mobile phone and the opposite surfaces of the two clamps  14  when the mobile phone is fastened, to avoid a temperature rise caused when the mobile phone and the surface of the clamp  14  are closely attached, and make, when the air vents  141  are disposed on the opposite surfaces of the two clamps  14 , it convenient for air flows to flow out from the air vents  141 , to cool the mobile phone that is being charged. 
     In addition, a shape and a fastening manner of the clamp  14  in this embodiment of this application are not limited to those shown in  FIG. 1 , and may be another shape and fastening manner. In a feasible embodiment, as shown in  FIG. 5( a )  and  FIG. 5( b ) , the clamp  14  includes a first structure (which is not shown in the figure, and is a part embedded into the inside of the charging panel  11  in  FIG. 5( a ) ) and a second structure (which is not shown in the figure, and is a part that is outside the charging panel  11  and that is perpendicular to the charging panel  11  in  FIG. 5( a ) ), and the first structure and the second structure are connected to each other and are perpendicular or approximately perpendicular to each other. 
     The first structure is embedded into the inside of the charging panel  11 , and the second structure is located on two sides of the charging panel  11 . An air vent  142  is disposed on a side surface at an end opposite to an end that is of the first structure and that is connected to the second structure. Air vents  141  are disposed on opposite surfaces of two second structures. The inside of the first structure and the second structure may be disposed as a hollow structure or an air duct (not shown in the figure) is disposed inside the first structure and the second structure, so that after being directed to the hollow structure or the air duct from the air vent  142 , an air flow blown out by the fan  151  flows out through the air vent  141 , to cool the mobile phone that is being charged. 
     When a shape of an electronic device that needs to be charged is relatively large and exceeds a width of the charging panel  11 , the clamps  14  on two sides of the charging panel  11  need to be pulled away from each other, so that first structures of the two clamps  14  are constantly withdrawn from the charging panel  11 , and a distance between the two second structures is constantly increased from a state in  FIG. 5( a )  to a state in  FIG. 5( b ) . When the distance between the two second structures reaches a width of the electronic device that needs to be charged, the electronic device is placed on the upper surface of the charging panel  11  and between the two second structures, so that the to-be-charged electronic device is fastened. 
     For a shape and a fastening manner of the clamp  14  designed in this way in this embodiment, a distance between the clamps  14  may be adjusted based on a shape and a size of an electronic device that needs to be charged, so that the wireless charging base provided in this embodiment of this application can charge electronic devices with different sizes and shapes. 
     Preferably, the air vent  141  is used as an air exhaust vent. After an air flow formed when air passes through the fan  151  flows out from the air vent  141 , air flows are formed on an upper surface and a lower surface of the mobile phone that is being charged, to cool the mobile phone that is being charged. 
     It should be specially noted that the wireless charging base provided in this embodiment of this application may include no clamp  14 . When the charging panel  11  is horizontally placed on a desktop or tilted on a desktop at a small angle, the mobile phone may be directly placed on the upper surface of the charging panel  11  without being fastened by using the clamp  14 . 
     The base plate  13  is disposed on the upper surface of the charging panel  11 , and is located at an end other than ends at which the air vent  112  and the clamp  14  are disposed, and is configured to support the mobile phone and prevent the mobile phone from falling down when the charging panel  11  is in a tilted state when charging the mobile phone. 
     In this embodiment of this application, an air vent  131  is disposed on a surface that is of the base plate  13  and that is close to the clamp  14 , and the inside of the base plate  13  is disposed as a hollow structure or an air duct (not shown in the figure) is disposed inside the base plate  13 , so that after being directed to the hollow structure or the air duct, an air flow flows out from the air vent  131 , as shown by the directions of the arrows shown in  FIG. 3  and  FIG. 4 , to cool the mobile phone that is being charged. 
     A shape of the air vent  131  is not limited to a matrix shape formed by a plurality of circular holes shown in  FIG. 1 , and may be a matrix shape formed by a plurality of parallel rectangular holes, a matrix shape formed by a plurality of square holes, or the like. This is not limited in this embodiment of this application. 
     It should be specially noted that, for the case in which the inside of the base plate  13  in this application is disposed as a hollow structure or an air duct is disposed inside the base plate  13 , the hollow structure or the air duct of the base plate  13  may be connected to the inside of the charging panel  11 , so that after being directed to the hollow structure or the air duct of the base plate  13 , an air flow blown out from the fan  151  flows out from the air vent  131 ; or may be connected to the inside of the subsequently described base plate  12 . Details are subsequently described. 
     In a feasible embodiment, at least two protrusions are disposed on the surface that is of the base plate  13  and that is close to the clamp  14 , and are configured to form, when the mobile phone is supported, an air duct between the mobile phone and the surface that is of the base plate  13  and that is close to the clamp  14 , to avoid a temperature rise caused when the mobile phone and the surface of the base plate  13  are closely attached, and make, when the air vent  131  is disposed on the surface that is of the base plate  13  and that is close to the clamp  14 , it convenient for air to flow out from the air vent  131 , to cool the mobile phone that is being charged. 
     In addition, an angle formed between the base plate  13  and the charging panel  11  may be a right angle, or may be an angle less than 90 degrees. When the angle formed between the base plate  13  and the upper surface of the charging panel  11  is less than 90 degrees, the mobile phone is placed on the base plate  13 , and a groove is formed at a joint between the surface that is of the base plate  13  and that is close to the clamp  14  and the upper surface of the charging panel  11 , to avoid a temperature rise caused when the mobile phone and the surface of the base plate  13  are closely attached, and make, when the air vent  131  is disposed on the surface that is of the base plate  13  and that is close to the clamp  14 , it convenient for air to flow out from the air vent  131 , to cool the mobile phone that is being charged. 
     The base plate  12  is disposed on the lower surface of the charging panel  11 , and is located at the same end as the base plate  13 . The base plate  12  is at a specific angle of the charging panel  11 , and is configured to support the charging panel  11  when the wireless charging base is placed on a desktop. 
     In this embodiment of this application, a fan  152  is disposed inside the base plate  12 . The base plate  12  includes an air vent  121 , and the air vent  121  is located on a surface that is of the base plate  12  and that is close to the lower surface of the charging panel  11 . The base plate  12  may be disposed as a hollow structure or an air duct (not shown in the figure) may be disposed inside the base plate  12 . The hollow structure or the air duct is connected to the hollow structure or the air duct of the base plate  13 . After air enters the fan  152  from the air vent  121 , an air flow is directed from the hollow structure or the air duct of the base plate  12  to the hollow structure or the air duct of the base plate  13 , and then flows out from the air vent  131 , as shown by directions of arrows shown in  FIG. 4 , to cool the mobile phone that is being charged. 
     The air vent  121  is most preferably located near the fan  152  on the surface that is of the base plate  12  and that is close to the lower surface of the charging panel  11 , to better provide air for the fan  152 . A shape of the air vent  121  may be a spiderweb-like shape, a matrix shape formed by a plurality of circular holes, or the like. This is not limited in this embodiment of this application. 
     In this embodiment of this application, a type, a model, and the like of the fan  152  are not limited, and may be the same as those of the fan  151 . A suitable type and size are specifically selected as actually required. A quantity of fans  152  is not limited, either, and is selected as actually required. 
     In addition, an angle formed between the base plate  12  and the charging panel  11  needs to be less than 90 degrees. Most preferably, the angle is 45 degrees to 75 degrees. Certainly, a connection manner between the base plate  12  and the charging panel  11  is not limited to fastening shown in  FIG. 1 , and may be a rotatable connection. In this case, a user may rotate the base plate  12  to change the angle between the base plate  12  and the charging panel  11  as required, to obtain, through adjustment, a shape desired by the user. 
     Preferably, in this embodiment of this application, the air vent  121  is used as an air intake vent, and the air vent  131  is used as an air exhaust vent. After air enters the fan  151  inside the base plate  12  through the air vent  121 , an air flow is formed and is directed from the hollow structure or the air duct of the base plate  12  to the hollow structure or the air duct of the base plate  13 , and then flows out from the air vent  131 . 
     According to the wireless charging base provided in this embodiment of this application, a fan is disposed inside the charging panel, to cool the charging panel  11  when the charging panel  11  operates and cool the electronic device that is being charged. A fan is disposed inside the base plate configured to support the charging panel, and an air flow formed in the fan flows out through an air vent on the base plate configured to support the electronic device that is being charged, to cool the electronic device that is being charged. 
       FIG. 6  and  FIG. 7  are schematic diagrams of structures of a wireless charging base according to an embodiment of this application. 
     As shown in the figure, the wireless charging base provided in this embodiment of this application includes a charging panel  21 , a base plate  22 , and two clamps  23 . An application scenario of the wireless charging base is mostly applied to scenarios such as in-car wireless charging. In the wireless charging base, a coupling apparatus is disposed on a surface (for ease of subsequent description, the surface is referred to as a “lower surface”, and a surface that is in contact with a mobile phone when the charging panel performs charging is referred to as an “upper surface”) that is of the charging panel  21  and that is opposite to the surface in contact with the electronic device, and the wireless charging base is coupled to an object such as glass, a blade on an air exhaust vent of an air conditioner of a cab, or a wall surface by using the coupling apparatus. 
     In this embodiment of this application, a fan is disposed inside the charging panel  21 . In this application, two fans are used as an example, and the two fans are a fan  251  and a fan  251 . The charging panel  21  includes at least two air vents: an air vent  211  (in this embodiment of this application, the air vent  211  is disposed behind the clamp, and therefore the air vent cannot be seen from  FIG. 6 ) that is located on a side surface around the charging panel  21  and an air vent (for ease of subsequent description, the air vent is defined as a “virtual air vent”) coupled to the base plate  22  and the clamp  23 . A shape of the air vent  211  may be a circular hole that has a relatively large radius, or may be a spiderweb-like shape, a matrix shape formed by a plurality of circular holes, or the like. This is not limited in this embodiment of this application, either. A shape of the virtual air vent needs to be determined based on shapes of the base plate  22  and the clamp  23 . 
     When the fan  251  and the fan  252  operate, one of the air vent  211  and the virtual air vent provides air for the fan  251  and the fan  252  as an air intake vent, and the other air vent in the air vent  211  and the virtual air vent exhausts air for the fan  251  and the fan  252  as an air exhaust vent. Because an internal temperature of the charging panel  21  becomes increasingly higher when the charging panel  21  charges the mobile phone, in this application, the fan  251  and the fan  252  are disposed inside the charging panel  21 , to cool the charging panel  21  when the charging panel  21  operates. 
     Preferably, in this embodiment of this application, the air vent  211  is used as an air intake vent, and the virtual air vent is used as an air exhaust vent. After air enters the fan  251  and the fan  252  inside the charging panel  21  through the air vent  211 , an air flow is formed and flows out from the virtual air vent, as shown by directions of arrows shown in  FIG. 8  and  FIG. 9 . 
     In this embodiment of this application, as shown in  FIG. 7 , the fan  251  and the fan  252  are stacked. After air enters the inside of the charging panel  21 , an air flow is formed after the air passes through the fan  251 , and then is directed to the fan  252 . The air flow is further expanded by the fan  252  and flows out from the air exhaust vent. Certainly, an arrangement manner between the fan  251  and the fan  252  is not limited to the foregoing stacking manner, and the fan  251  and the fan  252  may be arranged in parallel or crossed. This is not limited in this application. 
     Types, models, and the like of the fan  251  and the fan  252  are not limited. A size of the fan  151  needs to be small, so that the fan  151  is installed inside the charging panel  11 , without increasing an overall volume of the wireless charging base. 
     In addition, although two fans are used in this embodiment of this application, if a volume of the wireless charging base cannot accommodate two fans, one fan may be disposed in the charging panel  21  in this application, or three, four, or another quantity of fans may be disposed in the charging panel  21  as actually required. This is not limited in this embodiment of this application, either. 
     In a feasible embodiment, an air vent  212  is disposed on the upper surface of the charging panel  21 . The air vent  212  is most preferably located near the fan  252  on the upper surface of the charging panel  21 , so that an air flow blown out when the fan  252  operates better flows out from the air vent  212 , to cool the mobile phone that is being charged. A shape of the air vent  212  may be a circular hole that has a relatively large radius and that is shown in  FIG. 6 , or may be a spiderweb-like shape, a matrix shape formed by a plurality of circular holes, or the like. This is not limited in this embodiment of this application, either. 
     In a feasible embodiment, at least two protrusions are disposed at a center position of the upper surface of the charging panel  21 , and are configured to form an air duct between the mobile phone and the upper surface of the charging panel  21  when the mobile phone is close to the charging panel  21  and being charged, to avoid a temperature rise caused when the mobile phone and the upper surface of the charging panel  21  are closely attached, and make, when the air vent  212  is disposed on the upper surface of the charging panel  21 , it convenient for an air flow to flow out from the air vent  212 , as shown by the directions of the arrows shown in  FIG. 8  and  FIG. 9 , to cool the mobile phone that is being charged. A shape formed by the plurality of protrusions is not limited to a circle, and may be any pattern such as a rectangle or a star. This is not limited in this embodiment of this application, either. 
     The two clamps  23  are separately disposed on side surfaces around the charging panel  21 , so that the charging panel  21  is located between the two clamps  23 , and the two clamps  23  are configured to fasten, to the charging panel  21 , the mobile phone on which wireless charging is being performed. In this embodiment of this application, a shape of the clamp  23  is like “L” (herein, for ease of subsequent description, a part that is embedded into the inside of the charging panel  21  and that is parallel to the charging panel  23  is referred to as a third structure, and a part that is located on two sides of the charging panel  21  and that is perpendicular to the charging panel  21  is referred to as a fourth structure). 
     The third structure is embedded into the virtual air vent of the charging panel  21 , and the fourth structure is located on two sides of the charging panel  21 . An air vent  232  is disposed on a side surface at an end opposite to an end that is of the third structure and that is connected to the fourth structure. Air vents  231  are disposed on opposite surfaces of two fourth structures. The inside of the third structure and the fourth structure is disposed as a hollow structure or an air duct (not shown in the figure) is disposed inside the third structure and the fourth structure, so that after being directed to the hollow structure or the air duct from the air vent  232 , air flows blown out by the fan  251  and the fan  252  flow out through the air vents  231 , to cool the mobile phone that is being charged, as shown by the directions of the arrows shown in  FIG. 8  and  FIG. 9 . 
     When a shape of an electronic device that needs to be charged is relatively large and exceeds a width of the charging panel  21 , the clamps  23  on two sides of the charging panel  21  need to be pulled away from each other, so that third structures of the two clamps  23  are constantly withdrawn from the charging panel  21 , and a distance between the two fourth structures is constantly increased. When the distance between the two fourth structures reaches a width of the electronic device that needs to be charged, the electronic device is placed on the charging panel  21  and between the two fourth structures, so that the to-be-charged electronic device is fastened. 
     Preferably, the air vent  231  is used as an air exhaust vent. After air flows formed when air passes through the fan  251  and the fan  252  flow out from the air vents  231 , air flows are formed on an upper surface and a lower surface of the mobile phone that is being charged, to cool the mobile phone that is being charged. 
     In a feasible embodiment, at least two protrusions are disposed on opposite surfaces of the two clamps  23 , and are configured to form air ducts between the electronic device and the opposite surfaces of the two clamps  23  when the electronic device is fastened, to avoid a temperature rise caused when the electronic device and the surface of the clamp  23  are closely attached, and make, when the air vents  231  are disposed on the opposite surfaces of the two clamps  23 , it convenient for air flows to flow out from the air vents  231 , as shown by the directions of the arrows shown in  FIG. 8  and  FIG. 9 , to cool the mobile phone that is being charged. 
     A shape of the air vent  231  is not limited to a matrix shape formed by a plurality of circular holes shown in  FIG. 6 , and may be a matrix shape formed by a plurality of parallel rectangular holes, a matrix shape formed by a plurality of square holes, or the like. This is not limited in this embodiment of this application. 
     It should be specially noted that the wireless charging base provided in this embodiment of this application may include no clamp  23 . When the charging panel  21  is horizontally placed on a desktop or tilted on a desktop at a small angle, the mobile phone may be directly placed on the upper surface of the charging panel  21  without being fastened by using the clamp  23 . 
     In addition, a fastening manner of the clamp  23  in this embodiment of this application is not limited to the foregoing solution, and the clamps  23  may be directly fastened to side surfaces of two sides of the charging panel  21 , or may be fastened in another manner. This is not limited in this embodiment of this application. 
     The base plate  22  is disposed on a side surface around the charging panel  21  that is different from side surfaces of sides on which the clamps  23  are disposed, and is configured to support the electronic device and prevent the electronic device from falling down when the charging panel  21  is in a tilted state when charging the electronic device. In this embodiment of this application, a shape of the base plate  22  is like “L” (herein, for ease of subsequent description, a part that is embedded into the inside of the charging panel  21  and that is parallel to the charging panel  23  is referred to as a fifth structure, and a part that is located on two sides of the charging panel  21  and that is perpendicular to the charging panel  21  is referred to as a sixth structure). 
     The fifth structure is embedded into the virtual air vent of the charging panel  21 , and the sixth structure is located on a side surface of a side of the charging panel  21  that is different from the sides on which the clamps  23  are disposed. An air vent that communicates with the charging panel  21  is disposed on a side surface at an end opposite to an end that is of the fifth structure and that is connected to the sixth structure. An air vent  221  is disposed on a surface that is of the sixth structure and that is close to the charging panel  21 . The inside of the fifth structure and the sixth structure is disposed as a hollow structure or an air duct (not shown in the figure) is disposed inside the fifth structure and the sixth structure, so that after being directed to the hollow structure or the air duct from the air vent that communicates with the charging panel, air flows blown out by the fan  251  and the fan  252  flow out through the air vent  221 , as shown by the directions of the arrows shown in  FIG. 8  and  FIG. 9 , to cool the mobile phone that is being charged. 
     When a shape of an electronic device that needs to be charged is relatively large and is far beyond a length of the charging panel  21 , the base plate  22  at an end of the charging panel  21  needs to be pulled away from the charging panel  21 , so that the fifth structure of the base plate  22  is constantly withdrawn from the charging panel  21 , and a distance between the sixth structure and the charging panel  21  is constantly increased. When the distance between the sixth structure and the charging panel  21  reaches a length that does not cause the electronic device to fall backward when charging needs to be performed, the electronic device is placed on the charging panel  21  and between the two clamps  23  and the base plate  22 , so that the to-be-charged electronic device is fastened. 
     Preferably, the air vent  221  is used as an air exhaust vent. After air flows formed when air passes through the fan  251  and the fan  252  flow out from the air vent  221 , air flows are formed on an upper surface and a lower surface of the mobile phone that is being charged, to cool the mobile phone that is being charged. 
     In a feasible embodiment, at least two protrusions are disposed on a surface that is of the base plate  22  and that is close to the charging panel  21 , and are configured to form an air duct between the electronic device and the base plate  22  when the electronic device is supported, to avoid a temperature rise caused when the electronic device and the surface of the base plate  22  are closely attached, and make, when the air vent  221  is disposed on the surface that is of the base plate  22  and that is close to the charging panel  11 , it convenient for an air flow to flow out from the air vent  221 , to cool the mobile phone that is being charged. 
     A shape of the air vent  221  is not limited to a matrix shape formed by a plurality of circular holes shown in  FIG. 6 , and may be a matrix shape formed by a plurality of parallel rectangular holes, a matrix shape formed by a plurality of square holes, or the like. This is not limited in this embodiment of this application. 
     In addition, a fastening manner of the base plate  22  in this embodiment of this application is not limited to the foregoing solution, and the base plate  22  may be directly fastened to a side surface of an end of the charging panel  21 , or may be fastened in another manner. This is not limited in this embodiment of this application. 
     According to the wireless charging base provided in this embodiment of this application, the wireless charging base is mostly applied to an in-car charging scenario. Two fans are disposed inside the charging panel in the wireless charging base, to cool the charging panel  11  when the charging panel  11  operates and cool the electronic device that is being charged. 
     In the descriptions of this specification, the described specific features, structures, materials, or characteristics may be combined in a proper manner in any one or more of the embodiments or examples. 
     Finally, it should be noted that the foregoing embodiments are merely intended for describing the technical solutions of this application, but not for limiting this application. Although this application is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the scope of the technical solutions of the embodiments of this application.