Vehicle-mounted wireless charger with efficient heat dissipation

Abstract

The vehicle-mounted wireless charger comprises an installation panel, a shell and a fan, the shell is arranged at the bottom of the installation panel, air inlets are formed in the two sides of the top of the installation panel, protruding parts protruding outwards are arranged on the two sides of the shell, ventilation openings are formed in the tops of the protruding parts, and the fan is arranged in the shell. The shell is provided with an air inlet and a ventilation opening, the ventilation opening is located below the air inlet, the shell is internally provided with a coil assembly, a TEC refrigerator and a cooling fin which are sequentially arranged from top to bottom in an attached mode, the cooling fin comprises a plurality of fins arranged at intervals, the two sides of each fin extend into the corresponding protruding part, the bottom of the shell is provided with an air outlet, and the air outlet is located below the air inlet. The fan is arranged at the bottom of the shell and installed on the air outlet. By means of the structural design that double-side air inlet and double air channels are matched, the utilization efficiency of air flow is effectively improved, and the heat dissipation effect can be remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle electronic equipment, specifically to a vehicle wireless charger with high-efficiency heat dissipation. Background Technology

[0002] Currently, most cars are equipped with wireless chargers for charging wirelessly-enabled electronic devices such as mobile phones, smartwatches, and fitness trackers. Some wireless chargers contain a TEC cooler, which consists of a cold side and a hot side. When current passes through, the cold side absorbs heat, and the hot side releases heat. The cold side is used to cool the coils and electronic devices inside the charger, while the hot side is usually connected to a heat sink to dissipate the heat emitted by the hot side.

[0003] Existing wireless chargers with TEC (Transformer Energy Cooler) typically have a fan. Air enters through a top vent, flows through the charger's interior and over the heatsink, and is cooled to prevent heat buildup. However, most wireless chargers currently have only one vent, resulting in uneven and insufficient airflow to the heatsink. This low efficiency leads to slow heat dissipation, poor cooling of the TEC's hot side, and consequently, reduced cooling efficiency. This ultimately impacts charging efficiency and the user's charging experience, necessitating improvement. Utility Model Content

[0004] In view of this, in order to solve the above problems, this utility model provides a vehicle-mounted wireless charger with high-efficiency heat dissipation.

[0005] A high-efficiency heat dissipation vehicle wireless charger includes a mounting panel, a housing, and a fan. The housing is located at the bottom of the mounting panel. Air inlets are provided on both sides of the top of the mounting panel. The housing has outwardly protruding portions on both sides, and a vent is provided at the top of the protruding portion. The vent is located below the air inlets. Inside the housing, a coil assembly, a TEC cooler, and a heat sink are arranged sequentially from top to bottom. The heat sink includes multiple spaced fins, and the sides of the fins extend into the protruding portions. An air outlet is provided at the bottom of the housing. The fan is located at the bottom of the housing and mounted on the air outlet.

[0006] In the above technical solution, the coil assembly is used to charge the electronic device. The cold side of the TEC cooler contacts the coil assembly, and the hot side contacts the heat sink. Heat is transferred to the heat sink through the hot side, while the cold side dissipates heat from the coil assembly. During charging, the electronic device is placed on the mounting panel. Under the suction of the fan at the bottom of the housing, airflow enters from the air inlets on both sides of the top of the mounting panel, then enters the housing through the ventilation openings on both sides of the top of the housing, then passes through the protrusions on both sides of the housing, and finally exits from the air outlet at the bottom of the housing. This airflow provides air cooling for the inside of the charger, preventing heat buildup inside. The fins of the heat sink extend into the protrusions on both sides of the housing. This design exposes the heatsink fins directly below the vents. When the fan draws air in, the airflow enters through the vents and passes directly over the heatsink fins, flowing through the gaps between them. This significantly accelerates heat dissipation from the heatsink, enhancing its cooling effect on the TEC cooler's hot side. Furthermore, by creating protrusions on both sides of the casing, two air ducts are formed inside the casing, guiding the airflow into the charger through the heatsink from both sides. Given a fixed airflow volume, this allows for more even distribution of airflow across the heatsink, significantly increasing the contact area between the airflow and the heatsink, effectively improving airflow utilization efficiency, and achieving better heat dissipation.

[0007] In one embodiment, the top of the mounting panel is provided with two protrusions, the air inlet is provided on the side wall of the protrusions, and the bottom surface of the mounting panel is provided with a connecting hole at the position of the protrusions.

[0008] In the above technical solution, placing the air inlet on the side of the protrusion can effectively reduce the risk of foreign objects falling into the charger and achieve a hidden air inlet design, making the appearance more aesthetically pleasing. In addition, when charging, the electronic device can be placed on the protrusion, so that the device is in a suspended state, preventing its back from directly contacting the mounting panel, reducing the temperature, and ensuring airflow at the bottom of the device, which plays a good role in heat dissipation. The bottom surface of the mounting panel has a connecting hole at the location of the protrusion, and the ventilation port abuts against the bottom surface of the mounting panel and surrounds the connecting hole to prevent air leakage.

[0009] In one embodiment, the coil assembly includes a charging coil and a magnetic ring, the magnetic ring being disposed around the charging coil.

[0010] In the above technical solution, the charging coil is used to charge the electronic device, and the magnetic ring is used to position and attract the device during charging, so that the device is stably connected to the charger.

[0011] In one embodiment, the housing includes a top cover and a base, which are fastened together.

[0012] In the above technical solution, the top cover and the base are fastened together, and a cavity is formed inside to accommodate other structures.

[0013] In one embodiment, the top of the cover is provided with a mounting protrusion, the mounting panel is provided with a mounting hole through which the mounting protrusion passes, and the coil assembly is disposed inside the mounting protrusion.

[0014] In the above technical solution, the mounting ring passes through the mounting hole on the mounting panel, thereby placing the coil assembly on the mounting panel. This facilitates the magnetic ring to pick up the electronic device while allowing the coil assembly to contact the back of the charging device, thus transferring the cold surface temperature of the TEC cooler to the device. This achieves the purpose of heat dissipation at the bottom of the device, improving charging efficiency and charging experience.

[0015] In one embodiment, a thermally conductive decorative plate is mounted on the top of the mounting ring, and the thermally conductive decorative plate is in contact with the top surface of the magnetic ring.

[0016] In the above technical solution, the thermally conductive decorative plate seals the top of the mounting ring to prevent foreign objects from entering the charger. At the same time, the thermally conductive decorative plate is made of a material with good thermal conductivity. The top surface of the magnetic ring contacts the thermally conductive decorative plate. During charging, the back of the electronic device contacts the top surface of the thermally conductive decorative plate. The cold surface temperature of the TEC cooler can be transferred to the device through the magnetic ring and the thermally conductive decorative plate, thereby dissipating heat from the device and improving charging efficiency.

[0017] In one embodiment, a first antenna is provided on the top of the charging coil, and a mounting groove is provided on the top surface of the upper cover on one side of the mounting protrusion ring, and a second antenna is installed in the mounting groove.

[0018] In the above technical solution, the mounting groove and the mounting protrusion are located on both sides of the top surface of the cover. By installing the first antenna and the second antenna on both sides of the top of the cover, the recognition area can be increased, ensuring that NFC devices can be recognized in various locations and improving ease of use.

[0019] In one embodiment, the first antenna is a flexible structure.

[0020] In the above technical solution, the first antenna is an antenna made of flexible FPC, which has good bending and folding capabilities and is more flexible in shape design. This allows it to be installed on top of the charging coil without the need for additional structures on the housing. At the same time, it can reduce thickness and space occupation, making the overall structure more compact.

[0021] In one embodiment, the top of the heat sink is provided with a plurality of locking blocks, and the plurality of locking blocks form a slot for placing the TEC cooler.

[0022] In the above technical solution, the TEC cooler is placed in the slot enclosed by the card block, and the card block is used to limit the TEC cooler.

[0023] In one embodiment, the system further includes a PCBA board disposed inside the housing, the PCBA board being located below the heat sink, the bottom of the heat sink having a pin, and the PCBA board having a socket that mates with the pin.

[0024] In the above technical solution, the PCBA board is electrically connected to the charging coil, TEC cooler, fan and antenna inside the charger to control the operation of the entire wireless charger. The heat sink is mounted on the PCBA board through a pin. The heat generated by the PCBA board when it is working can be transferred to the heat sink for heat dissipation.

[0025] Compared with the prior art, the beneficial effects of this application are as follows:

[0026] The mounting panel of this application adopts a dual air inlet design, which increases the airflow into the charger by introducing air from both sides, thereby enhancing the heat dissipation effect. The housing has ventilation openings and protrusions corresponding to the two air inlets. The fins of the heat sink extend into the protrusions, so that the fins of the heat sink are directly exposed at the ventilation openings. The airflow can flow directly through the gaps between the fins of the heat sink, which greatly accelerates the heat dissipation speed of the heat sink and enhances the heat dissipation effect of the heat sink. In addition, the protrusions on both sides of the housing can form a dual air duct structure inside the housing. Under the premise of a certain air intake, the airflow can be guided to pass through the heat sink more evenly, effectively improving the utilization efficiency of the airflow and achieving a better heat dissipation effect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of an embodiment of an in-vehicle wireless charger.

[0029] Figure 2 An exploded view of a car wireless charger.

[0030] Figure 3 A 3D view of the car wireless charger after the mounting panel has been removed.

[0031] Figure 4 An exploded view of the shell and its internal structure (with the base removed).

[0032] Figure 5 for Figure 4 A magnified view of area A in the middle.

[0033] Figure 6 for Figure 3 Bottom view (with the base removed).

[0034] Figure 7 This is the bottom view of the mounting panel.

[0035] Figure 8 This is a top view of a car wireless charger.

[0036] Figure 9 for Figure 8 A cross-sectional view at position AA in the middle.

[0037] Explanation of the reference numerals in the figure:

[0038] 1-Mounting panel; 11-Protrusion; 111-Air inlet; 12-Connecting hole; 13-Mounting hole; 2-House; 21-Top cover; 211-Ventilation opening; 212-Mounting protrusion; 2121-Heat-conducting decorative plate; 213-Mounting groove; 2131-Connecting hole; 22-Base; 221-Air outlet; 23-Protrusion; 3-Coil assembly; 31-Charging coil; 32-Magnetic ring; 321-Opening; 4-First antenna; 41-Wiring terminal; 5-Second antenna; 6-TEC cooler; 7-Heat sink; 71-Fin; 72-Card; 73-Wiring hole; 74-Pin; 8-PCBA board; 81-Socket; 9-Fan; 91-Fan mount. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] Please refer to Figures 1 to 9 This embodiment provides a vehicle-mounted wireless charger for charging electronic devices (hereinafter, mobile phones are used as an example). It includes a mounting panel 1, a housing 2, and a fan 9. The housing 2 is located at the bottom of the mounting panel 1. Air inlets 111 are provided on both sides of the top of the mounting panel 1. The housing 2 has protruding parts 23 on both sides. Ventilation vents 211 are provided on the top of the protruding parts 23. The ventilation vents 211 are located below the air inlets 111. The housing 2 has a coil assembly 3, a TEC cooler 6, a heat sink 7, and a PCBA board 8 arranged sequentially from top to bottom. The heat sink 7 includes multiple spaced fins 71. The two sides of the fins 71 extend into the protruding parts 23. An air outlet 221 is provided at the bottom of the housing 2. The fan 9 is located at the bottom of the housing 2 and is mounted on the air outlet 221.

[0043] It should be noted that the TEC cooler 6 is a common refrigeration device in existing technology, and its specific principle and structure will not be elaborated here. (Refer to...) Figure 5 In the indicated direction, the upper surface of the TEC cooler 6 is the cold surface, and the lower surface is the hot surface. The cold surface of the TEC cooler 6 is in contact with the coil assembly 3, and the hot surface is in contact with the heat sink 7. The heat generated by the hot surface is transferred to the heat sink 7, while the cold surface cools the coil assembly 3.

[0044] like Figure 9 As shown in the diagram, the arrows indicate the airflow direction when the wireless charger is working. During charging, the phone is placed on the mounting panel 1. Under the suction of the fan 9 at the bottom of the housing 2, the air is drawn in from the two air inlets 111 at the top of the mounting panel 1, then enters the housing 2 through the vents 211, passes through the protrusions 23, and exits the housing 2 through the air outlets 221. Finally, it is discharged to the outside by the fan 9. The fins 71 of the heat sink 7 extend into the protrusions 23 on both sides of the housing 2, so that the fins 71 of the heat sink 7 are directly exposed below the vents 211. When the fan 9 draws in air, the airflow enters through the vents 211 and can directly pass through the fins 71 of the heat sink 7 and flow through the gaps between the fins 71, which greatly accelerates the heat dissipation speed of the heat sink 7. This enhances the heat dissipation effect of the heat sink 7 on the hot surface of the TEC cooler 6, thereby improving the working efficiency of the TEC cooler 6 and the heat dissipation capacity of the coil assembly 3 and the bottom of the phone.

[0045] By providing protrusions 23 on both sides of the housing 2, two air ducts are formed on both sides inside the housing 2. This guides the airflow into the charger to enter from both sides of the heat sink 7, and finally merges in the middle of the heat sink 7 before being discharged from the air outlet 221 below. Under the premise of a certain air intake volume, the dual air duct structure design allows the incoming airflow to pass through the heat sink 7 more evenly, increasing the contact area between the heat sink 7 and the airflow, thereby effectively improving the utilization efficiency of the airflow and achieving a better heat dissipation effect.

[0046] It should be noted that, as shown in the figure, in order to make room for the internal PCBA board 8, the fins 71 are only set on the bottom right side of the heat sink 7, and to accommodate the internal space of the charger, the two fins 71 on the right side are shorter than those on the left side.

[0047] Please refer to Figure 1 and Figure 2 The top of the mounting panel 1 has two symmetrically arranged protrusions 11. Air inlets 111 are located on the side walls of the protrusions 11, effectively reducing the risk of foreign objects falling into the charger and allowing for a concealed design, making the overall appearance more aesthetically pleasing. Furthermore, during charging, the phone can be placed on the protrusions 11, keeping it suspended and preventing the back of the phone from directly contacting the mounting panel 1, thus accelerating heat dissipation from the back of the phone. The suction from the side air inlets also ensures airflow around the bottom of the phone, improving heat dissipation. In addition, the bottom surface of the mounting panel 1 has a connecting hole 12 at the location of the protrusions 11. The size of the connecting hole 12 matches the vent 211, allowing the air inlet 111 and the vent 211 to connect. The vent 211 rests against the bottom surface of the mounting panel 1, surrounding the connecting hole 12 to prevent air leakage.

[0048] Preferably, the fan 9 is placed inside the fan holder 91, which is installed at the bottom of the base 22 and covers the air outlet 221.

[0049] Furthermore, the coil assembly 3 includes a charging coil 31 and a magnetic ring 32. The magnetic ring 32 is arranged around the charging coil 31. The charging coil 31 is used to charge the mobile phone, and the magnetic ring 32 is used to position and attract the mobile phone during charging, so that the mobile phone and the charger are accurately and stably connected.

[0050] Please refer to Figures 2 to 5The housing 2 includes a top cover 21 and a base 22, which are fastened together. The top of the top cover 21 is provided with a mounting protrusion 212. The coil assembly 3 is located inside the mounting protrusion 212. The mounting protrusion 212 passes through the mounting hole 13 on the mounting panel 1. A thermally conductive decorative plate 2121 is installed on the top of the mounting protrusion 212. The thermally conductive decorative plate 2121 is in contact with the top surface of the magnetic ring 32. The thermally conductive decorative plate 2121 seals the top of the mounting protrusion 212 to prevent foreign objects from entering the charger. At the same time, the thermally conductive decorative plate 2121 is made of a material with good thermal conductivity. The top surface of the magnetic ring 32 is in contact with the thermally conductive decorative plate 2121. During charging, the back of the electronic device is in contact with the top surface of the thermally conductive decorative plate 2121. The cold surface temperature of the TEC cooler 6 can be transferred to the mobile phone through the magnetic ring 32 and the thermally conductive decorative plate 2121 to dissipate heat from the mobile phone, so as to prevent the mobile phone from overheating and entering the overcharge protection, thereby improving charging efficiency and charging experience.

[0051] Preferably, the cold side of the TEC cooler 6 contacts the bottom surface of the coil assembly 3 through thermally conductive gel, the hot side contacts the top surface of the heat sink 7 through thermally conductive gel, and the bottom surface of the thermally conductive decorative plate 2121 contacts the top surface of the magnetic ring 32 through thermally conductive gel. By setting thermally conductive gel, the temperature conduction effect can be effectively guaranteed.

[0052] It is understandable that the top cover 21 and the base 22 each include a portion of the protrusion 23, and the top cover 21 and the base 22 are assembled to form a complete protrusion 23.

[0053] Please refer to Figure 4 The top of the charging coil 31 is provided with a first antenna 4, and the top surface of the top cover 21 is provided with a mounting groove 213 on one side of the mounting protrusion 212. A second antenna 5 is installed in the mounting groove 213. The mounting groove 213 and the mounting protrusion 212 are located on both sides of the top surface of the top cover 21. By setting two antennas, the recognition coverage area and range can be increased, ensuring that NFC devices can be recognized at various positions on the mounting panel 1, thus improving the convenience of use.

[0054] Preferably, the first antenna 4 is an antenna made of flexible FPC, which is smaller than the size of the magnetic ring 32. Flexible FPC has better bending and folding capabilities and is more flexible in shape design, so that it can be placed on top of the charging coil 31 without the need to add an extra structure for placement on the housing 2. At the same time, it can also reduce the thickness and space occupied, making the overall structure more compact.

[0055] Specifically, the first antenna 4 has a terminal 41 on one side, and the magnetic ring 32 has an opening 321 for the terminal 41 to pass through.

[0056] Please refer to Figure 5The top of the heat sink 7 is provided with multiple locking blocks 72, which surround to form a slot for placing the TEC cooler 6. The locking blocks 72 are used to install and limit the TEC cooler 6. The PCBA board 8 is mounted on the base 22, which is located below the heat sink 7. The bottom of the heat sink 7 is provided with a pin 74, and the PCBA board 8 is provided with a socket 81 that mates with the pin 74. The heat sink 7 is mounted on the PCBA board 8 through the pin 74. The PCBA board 8 is used to control the circuit and operation of the entire wireless charger. The heat generated by the PCBA board 8 during operation can be transferred to the heat sink 7 for heat dissipation.

[0057] Preferably, the heat sink 7 is provided with a wiring hole 73, the connection wires of the coil assembly 3 and the TEC cooler 6 are connected to the PCBA board 8 through the wiring hole 73, the wiring terminal 41 of the first antenna 4 passes through the wiring hole 73 and is connected to the PCBA board 8, the mounting groove 213 of the upper cover 21 is provided with a connection hole 2131, and the second antenna 5 is connected to the PCBA board 8 below through the connection hole 2131.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0059] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A high-efficiency heat dissipation vehicle-mounted wireless charger, characterized in that, The device includes a mounting panel, a housing, and a fan. The housing is located at the bottom of the mounting panel. Air inlets are provided on both sides of the top of the mounting panel. The housing has outwardly protruding parts on both sides, and a vent is provided at the top of the protruding parts. The vent is located below the air inlets. Inside the housing, a coil assembly, a TEC cooler, and a heat sink are arranged sequentially from top to bottom. The heat sink includes multiple spaced fins, and the sides of the fins extend into the protruding parts. An air outlet is provided at the bottom of the housing. The fan is located at the bottom of the housing and is mounted on the air outlet.

2. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 1, characterized in that, The top of the mounting panel has two protrusions, the air inlet is located on the side wall of the protrusions, and the bottom surface of the mounting panel has a connecting hole at the position of the protrusions.

3. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 1, characterized in that, The coil assembly includes a charging coil and a magnetic ring, the magnetic ring being arranged around the charging coil.

4. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 3, characterized in that, The housing includes a top cover and a base, which are fastened together.

5. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 4, characterized in that, The top of the cover is provided with a mounting protrusion, the mounting panel is provided with a mounting hole for the mounting protrusion to pass through, and the coil assembly is located inside the mounting protrusion.

6. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 5, characterized in that, A heat-conducting decorative plate is installed on the top of the mounting ring, and the heat-conducting decorative plate is in contact with the top surface of the magnetic ring.

7. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 5, characterized in that, The charging coil is provided with a first antenna at its top, and the top surface of the upper cover is provided with a mounting groove on one side of the mounting protrusion ring, and a second antenna is installed in the mounting groove.

8. The high-efficiency heat dissipation vehicle wireless charger according to claim 7, characterized in that, The first antenna is a flexible structure.

9. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 1, characterized in that, The top of the heat sink is provided with multiple locking blocks, which form a slot for placing the TEC cooler.

10. The high-efficiency heat dissipation vehicle-mounted wireless charger according to claim 1, characterized in that, It also includes a PCBA board disposed inside the housing, the PCBA board being disposed below the heat sink, the bottom of the heat sink having a pin, and the PCBA board having a socket that mates with the pin.

Images