A vehicle-mounted wireless charging module

Abstract

The utility model relates to a kind of vehicle wireless charging module in the technical field of vehicle wireless charging, including coil assembly and shell, coil assembly includes rectangular coil, PCB board and magnetic shield, rectangular coil is set on PCB board, magnetic shield is set between rectangular coil and PCB board.The rectangular coil is divided into the stereoscopic structure of at least two layers, by magnetic shield, the influence of magnetic field on surrounding metal components can be effectively blocked, the possibility of eddy current heating is greatly reduced.Simultaneously, in high-power wireless charging scene such as car, magnetic shield can prevent the interference of strong magnetic field on internal precision electronic components of vehicle, avoid the security risk caused by magnetic field disorder.And most of the to-be-charged equipment and vehicle charging area are rectangular, rectangular coil can maximize coil area, avoid space waste, reduce the problem of equipment placement deviation and broken charging.And the strong magnetic field formed by stacking design can effectively reduce the energy loss caused by distance increase, so as to ensure that charging efficiency is not affected.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted wireless charging technology, specifically to a vehicle-mounted wireless charging module. Background Technology

[0002] Wireless charging technology, originating from wireless power transfer technology, can be divided into two types: low-power wireless charging and high-power wireless charging. Low-power wireless charging often uses electromagnetic induction, such as the Qi method for charging mobile phones. Because energy is transferred between the charger and the device via a magnetic field, there is no wire connection between them, thus both the charger and the device can be designed without exposed conductive contacts. In-vehicle wireless charging technology, as an important supporting technology for the development of automotive intelligence and electrification, solves the charging needs of in-vehicle devices and electric vehicles themselves through wireless energy transfer. Its development is closely related to automotive electronics technology, wireless charging standards, and improvements in user experience.

[0003] Existing wireless charging coils have significant technical limitations during operation: the alternating magnetic field lacks directional constraint, spreading freely in all directions, resulting in a large amount of energy not being effectively captured by the receiving coil and thus being lost; simultaneously, the spreading magnetic field interferes with surrounding metal components, inducing eddy current effects and accompanied by heat generation, causing not only additional energy waste but also potential safety hazards. Furthermore, since most devices to be charged and in-vehicle charging areas are rectangular, circular coils are difficult to adapt to these regular spaces, easily leading to low space utilization due to blank corners, and consequently, charging interruptions even with slight device misalignment. Therefore, this utility model introduces a wireless charging module for in-vehicle use. Summary of the Invention

[0004] This invention provides an in-vehicle wireless charging module to solve the problems mentioned in the background section.

[0005] The objective of this invention is achieved through the following method: an in-vehicle wireless charging module, comprising a coil assembly and a housing, wherein the coil assembly includes a rectangular coil, a PCB board, and a magnetic shielding plate, the rectangular coil being disposed on the PCB board, and the magnetic shielding plate being disposed between the rectangular coil and the PCB board.

[0006] The rectangular coils are arranged in multiple layers, forming a three-dimensional structure composed of at least two layers arranged in a triangular pattern from bottom to top.

[0007] Furthermore, the outer casing is provided with a base, and the base is provided with mounting lugs.

[0008] Furthermore, a fan and a heat spreader are provided inside the housing. The heat spreader is installed on one side of the coil assembly. Thermal grease is provided between the heat spreader and the coil assembly. The fan is located on the side of the heat spreader away from the coil assembly.

[0009] Furthermore, the outer casing is provided with a first platform and a second platform, wherein the height of the first platform is greater than that of the second platform in a direction perpendicular to the outer casing.

[0010] Furthermore, the first platform is provided with multiple strip-shaped protrusions at intervals, and a heat dissipation groove is formed between two adjacent strip-shaped protrusions.

[0011] Furthermore, a transition section is provided between the first platform and the second platform, and the transition section is provided at an angle or in the form of an arc.

[0012] Furthermore, one end of the second platform is provided with a step that is flush with the first platform.

[0013] Furthermore, the step is provided with an air outlet, and the opening direction of the air outlet is opposite to that of the transition section.

[0014] This invention uses a magnetic shielding plate to confine the magnetic field range, effectively blocking the influence of the magnetic field on surrounding metal components and significantly reducing the possibility of eddy current heating. Simultaneously, in high-power wireless charging scenarios such as automobiles, the magnetic shielding plate prevents strong magnetic fields from interfering with delicate electronic components inside the vehicle, avoiding safety hazards caused by magnetic field disturbances and safeguarding the safe application of high-power wireless charging. Furthermore, most devices to be charged and the in-vehicle charging area are rectangular; rectangular coils maximize coil area, avoiding space waste caused by blank corners of circular coils and reducing charging interruption issues due to device misalignment. Moreover, in an in-vehicle environment, even with thick protective cases on mobile phones, the strong magnetic field generated by the stacked design effectively reduces energy loss due to increased distance, thus ensuring that charging efficiency is not affected. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an in-vehicle wireless charging module in Embodiment 1.

[0016] Figure 2 This is an exploded view of an in-vehicle wireless charging module in Embodiment 1 of this invention;

[0017] Figure 3 This is a schematic diagram of the structure of an in-vehicle wireless charging module in Embodiment 2.

[0018] Figure 4 This is an exploded view of an in-vehicle wireless charging module in Embodiment 2.

[0019] Figure 5 This is an exploded view of the coil assembly and heat sink in Embodiment 2.

[0020] Figure 6 This is a cross-sectional view of an in-vehicle wireless charging module according to Embodiment 2.

[0021] Figure 7 for Figure 6 Enlarged diagram of A in the middle;

[0022] The reference numerals in the figure are as follows: 1-base, 2-coil assembly, 201-rectangular coil, 202-magnetic shielding plate, 203-PCB board, 3-outer shell, 401-thermal grease, 402-heat spreader, 403-fan, 5-first platform, 6-second platform, 7-strip protrusion, 8-heat dissipation groove, 9-transition section, 10-air outlet, 11-air inlet, 12-step, 13-mounting lug. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1:

[0025] In this embodiment, refer to Figures 1-2 The present invention relates to a vehicle-mounted wireless charging module, comprising a coil assembly 2 and a housing 3. The coil assembly 2 includes a rectangular coil 201, a PCB board 203, and a magnetic shielding plate 202. The rectangular coil 201 is disposed on the PCB board 203. Since most devices to be charged and the vehicle-mounted charging area are rectangular, the rectangular coil 201 can maximize the coil area, avoid the space waste caused by the blank corners of the circular coil, and reduce the problem of charging interruption due to device misalignment. The magnetic shielding plate 202 is disposed between the rectangular coil 201 and the PCB board 203. By shielding the magnetic field, the magnetic shielding plate 202 reduces the eddy current effect and significantly reduces unnecessary heat generation, thereby reducing the temperature rise of the charger and the mobile phone and extending the device life.

[0026] The rectangular coils 201 are multiple in number, arranged in at least two layers in a triangular pattern from bottom to top, forming a three-dimensional structure. This triangular coil layout enhances the uniformity of the magnetic field, its resistance to offset, and its compatibility with various devices. This arrangement significantly improves the stability of wireless charging and the user experience. In an in-vehicle environment, even with a thick protective case, the strong magnetic field generated by this stacked design effectively reduces energy loss due to increased distance, thus ensuring that charging efficiency remains unaffected.

[0027] The outer casing 3 is provided with a base 1, and the base 1 is provided with mounting lugs. The mounting lugs are of a recessed design, which can optimize the installation layout of the module, thereby facilitating later installation, maintenance and replacement.

[0028] Example 2:

[0029] In this embodiment, refer to Figure 3-7 The present invention relates to a vehicle-mounted wireless charging module, comprising a coil assembly 2 and a housing 3. The coil assembly 2 includes a rectangular coil 201, a PCB board 203, and a magnetic shielding plate 202. The rectangular coil 201 is disposed on the PCB board 203. Since most devices to be charged and the vehicle-mounted charging area are rectangular, the rectangular coil 201 can maximize the coil area, avoid the space waste caused by the blank corners of the circular coil, and reduce the problem of charging interruption due to device misalignment. The magnetic shielding plate 202 is disposed between the rectangular coil 201 and the PCB board 203. By shielding the magnetic field, the magnetic shielding plate 202 reduces the eddy current effect and significantly reduces unnecessary heat generation, thereby reducing the temperature rise of the charger and the mobile phone and extending the device life.

[0030] The rectangular coils 201 are multiple in number, arranged in at least two layers in a triangular pattern from bottom to top, forming a three-dimensional structure. This triangular coil layout enhances the uniformity of the magnetic field, its resistance to offset, and its compatibility with various devices. This arrangement significantly improves the stability of wireless charging and the user experience. In an in-vehicle environment, even with a thick protective case, the strong magnetic field generated by this stacked design effectively reduces energy loss due to increased distance, thus ensuring that charging efficiency remains unaffected.

[0031] The first platform 5 is provided with strip-shaped protrusions 7 at intervals. The strip-shaped protrusions 7 and the intervals together form heat dissipation grooves 8, which can reduce the temperature of the module when charging the electrical equipment, improve charging stability, and extend the service life of the module.

[0032] The outer casing 3 is provided with a base 1, and the base 1 is provided with mounting lugs 13. The mounting lugs 13 are of a recessed design, which can optimize the installation layout of the module, thereby facilitating later installation, maintenance and replacement.

[0033] The housing 3 houses a fan 403 and a heat spreader 402. The heat spreader 402 is mounted on one side of the coil assembly 2, and thermal grease 401 is applied between the heat spreader 402 and the coil assembly 2. When the module is charging, the thermal grease 401 efficiently transfers the heat generated by the coil assembly 2 to the heat spreader 402. The fan 403 is positioned on the side of the heat spreader 402 away from the coil assembly 2. The fan 403 draws in outside air through the air inlet 11 and blows it onto the heat spreader 402, thereby dissipating heat from the heat spreader 402 and ultimately cooling the coil assembly 2.

[0034] The outer casing 3 is provided with a first platform 5 and a second platform 6 in a direction perpendicular to the outer casing 3. The height of the first platform 5 is greater than that of the second platform 6. This height difference is sufficient to accommodate the mobile phone camera, preventing the mobile phone receiving coil from being misaligned with the coil assembly 2 due to the protrusion of the camera. This avoids problems such as increased gap between the mobile phone and the coil assembly 2, reduced charging efficiency, increased heat generation, and repeated disconnection during charging.

[0035] A transition section 9 is provided between the first platform 5 and the second platform 6. The transition section 9 is designed with an angled or rounded shape. This structure can eliminate sharp edges and avoid the possibility of scratching the phone when picking it up.

[0036] One end of the second platform 6 has a step 12 that is flush with the first platform 5. Different brands of mobile phones have lenses with significant weight differences, and some models with heavier lenses are prone to being top-heavy. When a phone with a heavy lens is placed on the casing 3, the depression of the second platform 6, while accommodating the lens, cannot provide support. Due to the center of gravity shifting towards the lens side, the receiving coil on the other side of the phone gradually moves away from the coil assembly 2 under the leverage principle, disrupting the coupling between them. This not only easily leads to charging disconnections but also severely affects energy transfer efficiency. The step 12 design provides effective support for the phone lens side, balancing the phone's center of gravity and ensuring that the receiving coil on the other side remains in good contact with the first platform 5, ensuring it is within the normal operating range of the coil assembly, thus avoiding charging problems caused by positional misalignment.

[0037] The step 12 is provided with an air outlet 10 for discharging the hot airflow carried away from the heat spreader 402 by the fan 403 within the module. The opening direction of the air outlet 10 is opposite to that of the transition section 9. The air outlet 10 adopts a corner design and is equipped with a dustproof net to effectively prevent dust or other foreign objects from entering.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A wireless charging module for a vehicle comprising a coil assembly (2) and a housing (3), characterized in that: The coil assembly (2) includes a rectangular coil (201), a PCB board (203), and a magnetic shielding plate (202). The rectangular coil (201) is disposed on the PCB board (203), and the magnetic shielding plate (202) is disposed between the rectangular coil (201) and the PCB board (203). The rectangular coil (201) is provided in multiple layers and is divided into at least two layers arranged in a triangular shape from bottom to top to form a three-dimensional structure.

2. The vehicle-mounted wireless charging module according to claim 1, characterized in that: The outer shell (3) is provided with a base (1), and the base (1) is provided with mounting lugs (13).

3. The in-vehicle wireless charging module according to claim 1, characterized in that: A fan (403) and a heat spreader (402) are provided inside the housing (3). The heat spreader (402) is installed on one side of the coil assembly (2). Thermal grease (401) is provided between the heat spreader (402) and the coil assembly (2). The fan (403) is located on the side of the heat spreader (402) away from the coil assembly (2).

4. The vehicle-mounted wireless charging module according to claim 1, characterized in that: The outer shell (3) is provided with a first platform (5) and a second platform (6), and in the direction perpendicular to the outer shell (3), the height of the first platform (5) is greater than that of the second platform (6).

5. The vehicle-mounted wireless charging module according to claim 4, characterized in that: The first platform (5) is provided with a plurality of strip-shaped protrusions (7) spaced apart, and a heat dissipation groove (8) is formed between two adjacent strip-shaped protrusions (7).

6. A vehicle-mounted wireless charging module according to claim 4 or 5, characterized in that: A transition section (9) is provided between the first platform (5) and the second platform (6), and the transition section (9) is provided at an angle or in an arc.

7. The in-vehicle wireless charging module according to claim 6, characterized in that: One end of the second platform (6) is provided with a step (12) that is flush with the first platform (5).

8. The vehicle-mounted wireless charging module according to claim 7, characterized in that: The step (12) is provided with an air outlet (10), and the opening direction of the air outlet (10) is opposite to that of the transition part (9).

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