Multi-coil wireless charging case and vehicle-mounted wireless charging device

Abstract

The utility model discloses a kind of multi-coil wireless charging box and vehicle-mounted wireless charging equipment, and wireless charging box includes box body and built-in coil assembly, circuit board, heat dissipation component and temperature monitoring component;Coil assembly contains at least one magnetic attraction coil and at least one non-magnetic attraction coil, can be adapted magnetic attraction and non-magnetic attraction charging equipment respectively;In heat dissipation component, metal cooling fin is arranged between circuit board and coil assembly to realize heat conduction, and heat dissipation fan combines the air inlet, air outlet on box body to constitute directional air guide path, and cooling coil and charging equipment directly;Temperature monitoring component is by setting NTC thermistor on magnetic attraction coil, non-magnetic attraction coil and circuit board, and real-time acquisition each core site temperature and feedback to circuit board.The utility model can simultaneously satisfy the wireless charging demand of different types of equipment, effectively solve high-power charging heating problem, guarantee charging stability and security, especially applicable to vehicle-mounted and other higher compatibility, heat dissipation requirement scene.

Description

Technical Field

[0001] This utility model belongs to the field of wireless charging technology, specifically relating to a multi-coil wireless charging box and an in-vehicle wireless charging device. Background Technology

[0002] With the widespread application of wireless charging technology in the consumer electronics field, the demand for wireless fast charging in automotive scenarios is growing, especially for mobile devices such as smartphones, where the requirements for charging convenience and compatibility are constantly increasing.

[0003] Currently, the main problems with in-vehicle wireless charging devices on the market are as follows:

[0004] First, there is poor device compatibility. Existing devices typically only have a single type of charging coil, either a magnetic coil specifically for Apple phones or a non-magnetic coil suitable for other phones. This means that a single device cannot simultaneously meet the charging needs of different brands and models of phones. If a user changes their phone type, they may need to replace the car charger, increasing usage costs and inconvenience.

[0005] Secondly, poor heat dissipation efficiency affects charging performance and device lifespan. In-vehicle wireless charging, especially high-power fast charging, generates a significant amount of heat in the charging coil and internal PCB board. Current heat dissipation solutions are relatively simple, often relying only on simple heat sinks or natural convection, which are insufficient for effectively dissipating heat. This leads to excessively high device temperatures during high-power charging, triggering overheat protection mechanisms, forcing a reduction in charging power, slowing down charging speed, or even halting charging. Prolonged operation at high temperatures also accelerates the aging of internal electronic components, shortens device lifespan, and poses safety hazards.

[0006] Third, there is a lack of intelligent temperature management. Many devices lack real-time and accurate temperature monitoring capabilities, and cannot dynamically adjust their heat dissipation strategies based on the actual temperature inside the device and on the back of the phone. As a result, the heat dissipation system either operates at high power consumption continuously or has a slow response, resulting in unsatisfactory energy efficiency and heat dissipation performance.

[0007] Therefore, there is an urgent need for an in-vehicle wireless charging solution that is compatible with both magnetic and non-magnetic phones and has efficient active heat dissipation capabilities. Utility Model Content

[0008] To address the aforementioned technical problems, this utility model proposes a multi-coil wireless charging box and an in-vehicle wireless charging device.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows:

[0010] In a first aspect, this utility model discloses a multi-coil wireless charging box, comprising: a box body and a coil assembly, a circuit board, a heat dissipation assembly and a temperature monitoring assembly disposed within the box body;

[0011] The coil assembly is located inside the box on one side near its front, and includes: at least one magnetic coil and at least one non-magnetic coil. The magnetic coil and the non-magnetic coil are electrically connected to a circuit board, which is used to control the magnetic coil or the non-magnetic coil to charge the charging device.

[0012] The heat dissipation component includes: a metal heat sink, a cooling fan, and an air guide structure. The metal heat sink is disposed between the circuit board and the coil assembly. The cooling fan is disposed inside the box and located on the side of the circuit board away from the coil assembly, and is electrically connected to the circuit board. The air guide structure includes an air inlet and an air outlet opened on the box. The air inlet corresponds to the air inlet side of the cooling fan, and the air outlet is opened on the front of the box and located in the area of ​​the coil assembly.

[0013] The temperature monitoring component includes: NTC thermistors installed on the magnetic charging coil, the non-magnetic charging coil, and the circuit board. Each NTC thermistor is electrically connected to the circuit board and is used to monitor the temperature of the corresponding part in real time.

[0014] This utility model discloses a multi-coil wireless charging box, which has the following beneficial effects:

[0015] First, the coil assembly of this utility model includes at least one magnetic coil and at least one non-magnetic coil. This breaks through the limitation of existing in-vehicle wireless fast charging technologies that only support a single coil type, allowing for simultaneous compatibility with both magnetic and non-magnetic charging devices. Users do not need to purchase additional charging equipment when changing device types, reducing usage costs and improving device versatility.

[0016] Secondly, the heat dissipation component of this utility model includes: a metal heat sink, a cooling fan, and an air guiding structure. The metal heat sink can simultaneously cover the circuit board and the coil assembly, achieving initial heat conduction; the cooling fan, combined with the directional air guiding structure, can precisely direct cool air to the core charging area, directly cooling the coil assembly and the charging equipment placed there, thus solving the problem of heat accumulation under high-power charging.

[0017] Third, by setting NTC thermistors in key parts of the magnetic coil, non-magnetic coil and circuit board, this utility model can monitor the temperature of each core component in real time, providing data support for subsequent temperature control (such as dynamically adjusting the fan speed), avoiding the reduction of charging power, shortening of equipment life or safety risks due to local overheating, and ensuring charging stability and safety.

[0018] Based on the above technical solution, the following improvements can be made:

[0019] As a preferred embodiment, the coil assembly further includes an NFC communication coil, which is arranged around the magnetic coil and the non-magnetic coil, and is electrically connected to the circuit board.

[0020] By adopting the above-mentioned preferred solution, an NFC communication coil is added around the coil and electrically connected to the circuit board, which enables data interaction between the charging device and the wireless charging box and ensures the stability of communication.

[0021] As a preferred option, a magnetic shielding plate is also provided inside the box. The magnetic shielding plate is placed between the metal heat sink and the coil assembly to shield the electromagnetic waves generated by the coil assembly from interfering with the circuit board.

[0022] By adopting the above-mentioned preferred solution, a magnetic shielding plate is added between the metal heat sink and the coil assembly to shield electromagnetic interference and further improve the heat dissipation effect.

[0023] As a preferred embodiment, the heat dissipation assembly also includes a thermal pad, which is filled between the metal heat sink and the heat-generating device on the circuit board to conduct heat from the heat-generating device to the metal heat sink.

[0024] By adopting the above-mentioned preferred solution, a thermally conductive pad is filled between the metal heat sink and the heat-generating components on the circuit board to improve heat conduction efficiency and protect the components on the circuit board.

[0025] As a preferred embodiment, the metal heat sink has a recess corresponding to the position of the thermal pad. The depth of the recess matches the thickness of the thermal pad, allowing the thermal pad to be embedded within the recess. This ensures precise alignment between the thermal pad and the metal heat sink and the heat-generating components on the circuit board, preventing displacement of the thermal pad during assembly or use.

[0026] By adopting the above-mentioned preferred solution, a recess is provided at the position of the metal heat sink corresponding to the thermal pad, which ensures assembly accuracy and improves the stability of use.

[0027] On the other hand, this utility model also discloses an in-vehicle wireless charging device, comprising:

[0028] The vehicle-mounted panel has a support surface on the front for accommodating the device to be charged.

[0029] At least one of the aforementioned multi-coil wireless charging boxes is mounted on the back of the vehicle's dashboard.

[0030] This utility model also discloses an in-vehicle wireless charging device, which integrates a wireless charging box on the back of the vehicle panel, with the front support surface used to place the charging device. This meets the needs of compact vehicle space and convenient operation, and avoids the problems of traditional external charging devices occupying vehicle space and affecting driving safety.

[0031] As a preferred solution, the back of the vehicle panel is provided with a mounting slot and a buckle structure. The multi-coil wireless charging box is fixedly installed in the mounting slot and is securely connected to the vehicle panel through the buckle structure.

[0032] The preferred solution described above features a mounting groove and a snap-fit ​​structure on the back of the vehicle panel, ensuring stable installation and convenient assembly.

[0033] As a preferred embodiment, the support surface is provided with several protrusions, which are used to raise the device to be charged placed on it, so as to form an air circulation gap between the back of the device to be charged and the support surface.

[0034] The preferred design described above incorporates a boss on the support surface to further optimize heat dissipation and airflow.

[0035] As a preferred embodiment, the support surface is an inclined support surface, and the angle between the inclined support surface and the horizontal plane is 3 to 8 degrees, so that the device to be charged can automatically slide along the slope to the charging area corresponding to the coil assembly after being placed.

[0036] Using the above-mentioned preferred scheme, the support surface is set with an inclination angle of 3-8 degrees, which can realize automated charging positioning.

[0037] As a preferred option, the support surface of the vehicle panel is also provided with a support block, which is used to support the device to be charged.

[0038] A through-hole for heat dissipation is provided inside the support block. One end of the heat dissipation hole passes through the side of the support block facing the device to be charged, and the other end is connected to the through hole on the vehicle panel corresponding to the air outlet of the multi-coil wireless charging box.

[0039] The preferred solution described above includes a support block on the support surface and internal heat dissipation holes to dissipate heat from the charging device. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is one of the structural schematic diagrams of the multi-coil wireless charging box provided in the embodiments of this utility model.

[0042] Figure 2 This is the second structural schematic diagram of the multi-coil wireless charging box provided in this embodiment of the utility model.

[0043] Figure 3A cross-sectional view (near its front) of the multi-coil wireless charging box provided in an embodiment of this utility model.

[0044] Figure 4 A cross-sectional view (near its back) of the multi-coil wireless charging box provided in an embodiment of this utility model.

[0045] Figure 5 This is a longitudinal cross-sectional view of the multi-coil wireless charging box provided in an embodiment of the present invention.

[0046] Figure 6 This is a partial schematic diagram of the area near the metal heat sink (with heat dissipation fins) provided in an embodiment of the present invention.

[0047] Figure 7 This is one of the structural schematic diagrams of the vehicle-mounted wireless charging device provided in the embodiments of this utility model.

[0048] Figure 8 This is the second structural schematic diagram of the vehicle-mounted wireless charging device provided in this embodiment of the utility model.

[0049] Figure 9 A side view of an in-vehicle wireless charging device provided in an embodiment of this utility model.

[0050] The components are: 1-box body, 11-air inlet, 12-air outlet, 13-guide rib, 2-coil assembly, 21-magnetic coil, 22-non-magnetic coil, 3-circuit board, 4-metal heat sink, 41-heat sink fin, 5-NTC thermistor, 6-NFC communication coil, 7-magnetic shield, 8-vehicle panel, 81-protrusion, 82-support block, 821-heat dissipation hole. Detailed Implementation

[0051] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] The expression “includes” is an “open-ended” expression, which means that there is a corresponding component or step, and should not be interpreted as excluding additional components or steps.

[0054] To achieve the objectives of this utility model, in some embodiments of the multi-coil wireless charging box, in order to solve the aforementioned technical problems, such as... Figure 1-5 As shown, the multi-coil wireless charging box includes: a box body 1 and a coil assembly 2, a circuit board 3, a heat dissipation assembly, and a temperature monitoring assembly disposed within the box body 1.

[0055] The coil assembly 2 is located inside the housing 1 on one side near its front, and includes: a magnetic coil 21 and two non-magnetic coils 22. The magnetic coil 21 and the non-magnetic coils 22 are electrically connected to the circuit board 3, which is used to control the magnetic coil 21 or the non-magnetic coils 22 to charge the charging device.

[0056] The heat dissipation assembly includes: a metal heat sink 4, a cooling fan (not shown in the figure), and an air guide structure. The metal heat sink 4 is disposed between the circuit board 3 and the coil assembly. The cooling fan is disposed inside the housing 1 and located on the side of the circuit board 3 away from the coil assembly, and is electrically connected to the circuit board 3. The air guide structure includes an air inlet 11 and an air outlet 12 opened on the housing 1. The air inlet 11 is opened on the back of the housing 1 corresponding to the air inlet side of the cooling fan, and the air outlet 12 is opened on the front of the housing 1 and located in the area of ​​the coil assembly.

[0057] The temperature monitoring component includes: NTC thermistors 5 disposed on the magnetic charging coil, the non-magnetic charging coil, and the circuit board 3. Each NTC thermistor 5 is electrically connected to the circuit board 3 and is used to monitor the temperature of the corresponding part in real time.

[0058] The circuit board 3 is also configured to control the operating status of the cooling fan based on the temperature monitored by the NTC thermistor 5.

[0059] Airflow enters through air inlet 11. Part of the airflow flows through circuit board 3 to dissipate heat, while the other part of the airflow is directed through air outlet 12 to the back of the device to be charged, which is placed on the wireless charging box. The cool air generated by the cooling fan is directed to the back of the device to be charged.

[0060] This utility model discloses a multi-coil wireless charging box, which has the following beneficial effects:

[0061] First, the coil assembly of this utility model includes at least one magnetic coil 21 and at least one non-magnetic coil 22. This breaks the limitation of existing in-vehicle wireless fast charging technologies that only support a single coil type, allowing for simultaneous compatibility with both magnetic and non-magnetic charging devices. Users do not need to purchase additional charging equipment when changing device types, reducing usage costs and improving device versatility.

[0062] Secondly, the heat dissipation component of this utility model includes: a metal heat sink 4, a cooling fan, and an air guiding structure. The metal heat sink 4 can simultaneously cover the circuit board 3 and the coil assembly, achieving initial heat conduction; the cooling fan, combined with the directional air guiding structure, can precisely direct cool air to the core charging area, directly cooling the coil assembly and the charging equipment placed there, thus solving the problem of heat accumulation under high-power charging.

[0063] Third, by setting NTC thermistors 5 in key parts of the magnetic coil 21, non-magnetic coil 22 and circuit board 3, this utility model can monitor the temperature of each core component in real time, providing data support for subsequent temperature control (such as dynamically adjusting the fan speed), avoiding the reduction of charging power, shortening of equipment life or safety risks due to local overheating, and ensuring charging stability and safety.

[0064] To further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the coil assembly further includes an NFC communication coil 6, which is arranged around the periphery of the magnetic coil 21 and the non-magnetic coil 22, and the NFC communication coil 6 is electrically connected to the circuit board 3.

[0065] By adopting the above-mentioned preferred solution, an NFC communication coil 6 is added around the coil and electrically connected to the circuit board 3, which enables data interaction between the charging device and the wireless charging box and ensures the stability of communication.

[0066] This invention supports NFC data communication between charging devices and wireless charging boxes, such as synchronizing charging parameters (e.g., matching charging power and current), identifying device models to match the optimal charging mode, and providing feedback on charging status (e.g., power progress and abnormal prompts), thereby improving the intelligence of charging.

[0067] The NFC communication coil 6 is arranged around the magnetic / non-magnetic coil, which can avoid direct interference with the charging coil and ensure close-range communication with the charging device, reduce communication interruption problems in scenarios such as driving bumps, and ensure the reliability of data transmission.

[0068] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that a magnetic shielding plate 7 is also provided inside the box 1. The magnetic shielding plate 7 is disposed between the metal heat sink 4 and the coil assembly, and is used to shield the electromagnetic waves generated by the coil assembly from interfering with the circuit board 3.

[0069] Using the preferred embodiment described above, one side of the magnetic shielding plate 7 is attached to the metal heat sink 4, and the other side is attached to the coil assembly. Each charging coil has a thermistor with connecting wires attached to it. The magnetic shielding plate 7 can shield electromagnetic interference and further improve heat dissipation.

[0070] When the coil assembly is working, it generates electromagnetic waves. The magnetic shielding plate 7 can effectively block the electromagnetic waves from radiating towards the circuit board 3, preventing electromagnetic waves from interfering with the normal operation of electronic components such as the CPU and capacitors on the circuit board 3, preventing problems such as charging control disorder and parameter drift, and ensuring the stability of the charging box circuit.

[0071] While shielding interference, the magnetic shielding plate 7 can work with the metal heat sink 4 to form a "heat conduction channel". The heat generated by the coil assembly can be transferred to the metal heat sink 4 through the magnetic shielding plate 7, further improving the heat dissipation coverage and enhancing the overall heat dissipation effect.

[0072] It is worth noting that, based on the above embodiments, such as Figure 6 As shown, the metal heat sink 4 has several upward-extending heat dissipation fins 41, which are interspersed in the reserved holes or edge gaps of the magnetic shielding plate 7 and are as close as possible to the coil assembly. This allows the metal heat sink 4 to not only conduct heat downwards from the circuit board 3, but also directly absorb heat generated by the coil upwards, forming a bidirectional heat conduction path of "circuit board 3 -> metal heat sink 4 <- coil".

[0073] Furthermore, the air guiding structure also includes: a guide rib 13 (the guide rib 13 is an open ring structure with the opening directly facing the air outlet 12, and the ring structure forms a section a to accommodate the cooling fan) set inside the box body 1, which divides the airflow generated by the cooling fan into main and auxiliary paths.

[0074] The main airflow channel is directed to the air outlet 12 and blows directly onto the back of the charging device for forced convection cooling.

[0075] The auxiliary airflow channel is guided to flow through the heat dissipation fins 41 of the metal heat sink 4 and the surface of the circuit board 3, so as to achieve effective air cooling of the internal components.

[0076] This invention utilizes the special structure of the metal heat sink 4 (with interlaced fins) to actively construct an efficient heat conduction channel from the coil to the heat sink. Meanwhile, simple air cooling may be ineffective (serving only the charging device or only the internal components). This invention, through a simple airflow guide rib design 13, achieves zoned heat dissipation that addresses both internal and external needs using a single fan. Furthermore, gradient air pressure distribution ensures sufficient airflow to the charging device while simultaneously cooling the internal components. This "one-piece, dual-effect" heat dissipation management strategy embodies a systematic design philosophy, transcending the mere stacking of components.

[0077] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the heat dissipation component also includes a thermal pad (not shown in the figure). The thermal pad is filled between the metal heat sink 4 and the heat-generating device of the circuit board 3, and is used to conduct the heat of the heat-generating device to the metal heat sink 4.

[0078] By adopting the above-mentioned preferred solution, a thermally conductive pad is filled between the metal heat sink 4 and the heat-generating device on the circuit board 3 to improve the heat conduction efficiency and protect the device on the circuit board 3.

[0079] The thermal pad can tightly fill the tiny gaps between the metal heat sink 4 and the heat-generating components (such as power chips and resistors) on the circuit board 3, avoiding the problem of increased thermal resistance caused by air gaps, and efficiently conducting the heat generated by the heat-generating components to the metal heat sink 4, reducing local overheating of the circuit board 3.

[0080] The thermal pad is made of soft material (such as silicone thermal pad), which can form a buffer between the metal heat sink 4 and the circuit board 3 to avoid wear or damage to the device caused by hard contact. At the same time, it has a certain degree of insulation to prevent the risk of short circuit.

[0081] To further optimize the implementation effect of this utility model, in some other embodiments, the remaining technical features are the same, except that a recess is provided on the metal heat sink 4 corresponding to the position of the thermal pad. The depth of the recess is adapted to the thickness of the thermal pad, so that the thermal pad can be embedded in the recess. This achieves precise alignment between the thermal pad and the metal heat sink 4 and the heat-generating device of the circuit board 3, preventing the thermal pad from shifting during assembly or use.

[0082] By adopting the above-mentioned preferred solution, a recess is provided at the position of the metal heat sink 4 corresponding to the thermal pad, which ensures assembly accuracy and improves the stability of use.

[0083] The depth of the recess is matched with the thickness of the thermal pad, which can realize the embedding and positioning of the thermal pad and avoid "heat conduction misalignment" caused by thermal pad displacement during assembly (such as the thermal pad not covering the heat-generating device), thus ensuring a stable heat conduction path.

[0084] During driving, the charging box will be bumpy. The recessed part can limit the thermal pad to prevent it from shifting, ensuring the fit between the thermal pad and the heat-generating device and the metal heat sink 4 during long-term use, and maintaining stable heat dissipation efficiency.

[0085] like Figure 7-9 As shown, in some other embodiments, this utility model also discloses an in-vehicle wireless charging device, comprising:

[0086] The vehicle panel 8 has a support surface on its front for accommodating the device to be charged.

[0087] Two of the aforementioned multi-coil wireless charging boxes are mounted on the back of the vehicle panel 8.

[0088] This utility model also discloses an in-vehicle wireless charging device, which integrates a wireless charging box on the back of the vehicle panel 8, with the front support surface used to place the charging device. This meets the needs of compact vehicle space and convenient operation, and avoids the problems of traditional external charging devices occupying vehicle space and affecting driving safety.

[0089] The number of wireless charging boxes can be flexibly configured according to vehicle needs (such as a single box for a single device or multiple boxes for multiple devices), while inheriting the compatibility and heat dissipation advantages of the aforementioned wireless charging boxes to ensure a good charging experience in vehicle scenarios.

[0090] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the back of the vehicle panel 8 is provided with a mounting groove and a buckle structure, and the multi-coil wireless charging box is fixedly installed in the mounting groove and forms a tight connection with the vehicle panel 8 through the buckle structure.

[0091] Using the above-mentioned preferred solution, the back of the vehicle panel 8 is provided with a mounting groove and a snap-fit ​​structure, which ensures stable installation and convenient assembly.

[0092] The wireless charging case is fixed in the mounting slot, and the snap-fit ​​structure forms a tight connection, which can prevent the charging case from shifting or falling off due to driving bumps, and avoid problems such as charging interruption and loose wiring harness connectors caused by displacement.

[0093] The snap-fit ​​structure allows for easy assembly and disassembly of the charging case without the need for additional tools, facilitating future maintenance (such as replacement of the charging case in case of malfunction) and reducing after-sales costs.

[0094] In order to further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that a plurality of protrusions 81 are provided on the support surface. The protrusions 81 are used to raise the device to be charged placed on them so that an air flow gap is formed between the back of the device to be charged and the support surface.

[0095] The preferred scheme described above includes a boss 81 on the support surface to further optimize heat dissipation and airflow.

[0096] The protrusion 81 raises the bottom of the charging device, creating an airflow gap between the back of the device and the supporting surface. This gap can connect with the air outlet 12 of the charging box and the heat dissipation hole 821 of the vehicle panel 8, forming a "cold air in - hot air out" circulation channel, thus avoiding heat dissipation obstruction caused by the back of the device being in contact with the supporting surface.

[0097] The boss 81 reduces the direct contact area between the back of the charging device and the support surface, reducing the risk of wear and tear, while also preventing stains (such as dust and water stains) on the support surface from directly contaminating the back of the device.

[0098] To further optimize the implementation effect of this utility model, in some other embodiments, the remaining features are the same, except that the support surface is an inclined support surface and the angle α formed by the inclined support surface and the horizontal plane is 3 to 8 degrees, which is used to enable the device to be charged to automatically slide along the slope to the charging area corresponding to the coil assembly after being placed.

[0099] Using the above-mentioned preferred scheme, the support surface is set with an inclination angle of 3-8 degrees, which can realize automated charging positioning.

[0100] After the user places the charging device, the device can automatically slide along the inclined surface to the charging area corresponding to the coil assembly under the action of gravity, without the need for manual adjustment and alignment. This solves the problem of "difficulty in finding the right position and inaccurate alignment" in traditional vehicle charging and improves the convenience of operation.

[0101] The tilt angle is controlled between 3 and 8 degrees, which can ensure that the equipment slides down smoothly, while avoiding excessive angle that may cause the equipment to slide down too fast and be damaged by collision, thus balancing convenience and safety.

[0102] It is worth noting that, in the specific embodiment, the two feet of the above-mentioned vehicle panel 8 have a height difference. After installation, it will be tilted by 5 degrees. When the device to be charged is placed on it, it can automatically slide down onto the support frame, reach the charging area, and be close to the air outlet 12 for heat dissipation.

[0103] Furthermore, based on the above embodiments, a support block 82 is also provided on the support surface of the vehicle panel 8, and the support block 82 is used to support the device to be charged.

[0104] A through-hole 821 is provided inside the support block 82. One end of the heat dissipation hole 821 passes through the side of the support block 82 facing the device to be charged, and the other end is connected to the through hole of the air outlet 12 of the multi-coil wireless charging box on the vehicle panel 8.

[0105] The preferred solution described above is provided with a support block 82 on the support surface and has heat dissipation holes 821 inside to dissipate heat from the charging device.

[0106] The support block 82 can prevent the device from sliding excessively along the inclined surface, ensuring that the device stays in the optimal charging area. At the same time, it works with the inclined surface to achieve "automatic sliding + precise limiting", further improving positioning accuracy.

[0107] One end of the heat dissipation hole 821 is connected to the air outlet 12 of the charging box, and the other end faces the back of the device. It can direct the cool air to the core heat-generating area on the back of the device (such as the battery position), solve the problem of low heat dissipation efficiency of the device itself, and avoid the device overheating and triggering the protection mechanism during charging.

[0108] The above-mentioned implementation methods can be carried out in parallel or in a cross-cutting manner.

[0109] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A multi-coil wireless charging box, characterized in that, include: The housing, and the coil assembly, circuit board, heat dissipation assembly and temperature monitoring assembly disposed within the housing; The coil assembly is disposed in the box body on one side near its front, and includes: at least one magnetic coil and at least one non-magnetic coil. The magnetic coil and the non-magnetic coil are respectively electrically connected to a circuit board. The circuit board is used to control the magnetic coil or the non-magnetic coil to charge the charging device. The heat dissipation component includes: a metal heat sink, a cooling fan, and an air guide structure. The metal heat sink is disposed between the circuit board and the coil assembly. The cooling fan is disposed inside the housing and located on the side of the circuit board away from the coil assembly, and is electrically connected to the circuit board. The air guide structure includes an air inlet and an air outlet on the housing. The air inlet corresponds to the air inlet side of the cooling fan, and the air outlet is located on the front of the housing and in the area of ​​the coil assembly. The temperature monitoring component includes: NTC thermistors disposed on the magnetic charging coil, the non-magnetic charging coil, and the circuit board, each of the NTC thermistors being electrically connected to the circuit board for real-time monitoring of the temperature of the corresponding part.

2. The multi-coil wireless charging box according to claim 1, characterized in that, The coil assembly further includes an NFC communication coil, which is arranged around the magnetic coil and the non-magnetic coil, and is electrically connected to the circuit board.

3. The multi-coil wireless charging box according to claim 1, characterized in that, The box is also equipped with a magnetic shielding plate, which is located between the metal heat sink and the coil assembly to shield the electromagnetic waves generated by the coil assembly from interfering with the circuit board.

4. The multi-coil wireless charging box according to claim 1, characterized in that, The heat dissipation assembly also includes a thermal pad, which is filled between the metal heat sink and the heat-generating device of the circuit board to conduct heat from the heat-generating device to the metal heat sink.

5. The multi-coil wireless charging box according to claim 4, characterized in that, The metal heat sink has a recessed portion corresponding to the position of the thermal pad. The depth of the recessed portion is adapted to the thickness of the thermal pad, so that the thermal pad can be embedded in the recessed portion.

6. A vehicle-mounted wireless charging device, characterized in that, include: The vehicle-mounted panel has a support surface on its front for accommodating the device to be charged. At least one multi-coil wireless charging box as described in any one of claims 1 to 5, the wireless charging box being mounted on the back of the vehicle panel.

7. The vehicle-mounted wireless charging device according to claim 6, characterized in that, The back of the vehicle panel is provided with a mounting groove and a buckle structure. The multi-coil wireless charging box is fixedly installed in the mounting groove and is fastened to the vehicle panel through the buckle structure.

8. The vehicle-mounted wireless charging device according to claim 6, characterized in that, The support surface is provided with a number of protrusions, which are used to raise the device to be charged placed on it, so that an air flow gap is formed between the back of the device to be charged and the support surface.

9. The vehicle-mounted wireless charging device according to claim 6, characterized in that, The support surface is an inclined support surface, and the angle between the inclined support surface and the horizontal plane is 3 to 8 degrees, which is used to allow the device to be charged to automatically slide along the slope to the charging area corresponding to the coil assembly after being placed.

10. The vehicle-mounted wireless charging device according to claim 9, characterized in that, The support surface of the vehicle panel is also provided with a support block, which is used to support the device to be charged. A through-hole for heat dissipation is provided inside the support block. One end of the heat dissipation hole passes through the side of the support block facing the device to be charged, and the other end is connected to the through hole on the vehicle panel corresponding to the air outlet of the multi-coil wireless charging box.

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