Wireless charging printed circuit board, wireless charging device and vehicle

Abstract

The utility model belongs to the technical field of wireless charging, and discloses a wireless charging printed circuit board, a wireless charging device and a vehicle. Wherein the wireless charging printed circuit board comprises a wireless charging printed circuit board body and a coil core board formed in the wireless charging printed circuit board body, the coil core board comprises a main power transmitting coil and NFC transmitting coils, and the NFC transmitting coils are fixed to the periphery of the main power transmitting coil at intervals; the wireless charging printed circuit board body is provided with a first ventilation hole penetrating in the thickness direction of the wireless charging printed circuit board body, and the main power transmitting coils are located on the periphery of the first ventilation hole at intervals; and the first ventilation hole is used for supplying air to the wireless charging electrical part for heat dissipation. According to the wireless charging printed circuit board, the effect and efficiency of cooling the wireless charging electrical part can be effectively improved, the wireless charging printed circuit board can be cooled, and the integration, standardization and miniaturization effects of the wireless charging printed circuit board are improved.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, and in particular to wireless charging printed circuit boards, wireless charging devices, and vehicles. Background Technology

[0002] Wireless charging devices such as mobile phones and tablets typically have their wireless charging receiver coil located on the back, specifically on the side away from the display screen and close to the battery, inside the device's casing. Because these devices need to be thin, the wireless charging receiver coil is usually made of FPC (Flexible Printed Circuit). During wireless charging, the heat generated by the receiver coil rises rapidly, and this heat radiates and conducts to the battery. Therefore, the back cover of these devices is usually made of materials with good heat dissipation, such as glass or ceramic, and cool air is blown onto the device during charging to help cool it down.

[0003] Currently, in order to improve the integration, standardization and miniaturization of wireless charging devices using the electromagnetic induction principle, one existing technology directly integrates both the NFC (Near Field Communication) transmitting coil and the main power transmitting coil into a printed circuit board. However, when the wireless charging device charges the wireless charging device, it still cannot directly blow air to cool the areas on the wireless charging device where heat is concentrated, resulting in poor cooling effect and low efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a wireless charging printed circuit board, a wireless charging device, and a vehicle to solve the aforementioned problems in the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A wireless charging printed circuit board includes a wireless charging printed circuit board body and a coil core board formed within the wireless charging printed circuit board body. The coil core board includes a main power transmitting coil and an NFC transmitting coil, with the NFC transmitting coil fixed at intervals around the main power transmitting coil.

[0007] The wireless charging printed circuit board body has a first ventilation hole that extends through its own thickness direction, and the main power transmitting coil is spaced around the first ventilation hole; the first ventilation hole is used to supply air to the wireless charging electrical components for heat dissipation.

[0008] As a preferred embodiment of the aforementioned wireless charging printed circuit board, the extension direction of the first ventilation hole is parallel to the thickness direction of the wireless charging printed circuit board body.

[0009] As a preferred embodiment of the aforementioned wireless charging printed circuit board, the first ventilation hole includes a plurality of sub-ventilation holes, which are spaced apart on the body of the wireless charging printed circuit board.

[0010] As a preferred embodiment of the aforementioned wireless charging printed circuit board, a first electrical connection layer is fixedly disposed on the inner peripheral wall of the sub-ventilation hole.

[0011] As a preferred embodiment of the aforementioned wireless charging printed circuit board, the wireless charging printed circuit board body is provided with a second ventilation hole extending along its own thickness direction. The second ventilation hole is located between the magnetic material layer of the wireless charging printed circuit board body and the NFC transmitting coil, and the second ventilation hole is used to supply air for heat dissipation to the wireless charging electrical components; and / or,

[0012] The wireless charging printed circuit board body has a third ventilation hole that runs through its own thickness direction. The third ventilation hole is located at intervals around the NFC transmitting coil and is used to supply air to the wireless charging electrical components for heat dissipation.

[0013] As a preferred embodiment of the aforementioned wireless charging printed circuit board, the wireless charging printed circuit board body further includes:

[0014] A magnetic plate is fixedly formed on one side of the coil core plate; the magnetic material layer of the magnetic plate is in contact with the main power transmitting coil, and the NFC transmitting coil is spaced around the periphery of the magnetic material layer;

[0015] A charging control board is fixedly formed on the side of the magnetic plate away from the coil core plate. The main power transmitting coil is electrically connected to the control circuit in the charging control board through a first via, and the NFC transmitting coil is electrically connected to the control circuit in the charging control board through a second via.

[0016] As a preferred embodiment of the aforementioned wireless charging printed circuit board, the magnetic board further includes a semi-cured layer, and the magnetic material layer is embedded and fixed in the semi-cured layer.

[0017] As a preferred embodiment of the aforementioned wireless charging printed circuit board, the wireless charging printed circuit board body further includes:

[0018] A shielding filter layer is located on the side of the coil core plate away from the magnetic plate.

[0019] A first dielectric material layer is located between the shielding filter layer and the coil core plate, and the first dielectric material layer is used to fix the shielding filter layer to the coil core plate.

[0020] The wireless charging device includes a cooling channel and the aforementioned wireless charging printed circuit board; the cooling channel includes the first ventilation hole, or the cooling channel passes through the first ventilation hole.

[0021] The vehicle, including the aforementioned wireless charging device.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides a wireless charging printed circuit board, a wireless charging device, and a vehicle. The wireless charging printed circuit board includes a wireless charging printed circuit board body and a coil core board formed within the wireless charging printed circuit board body. The coil core board includes a main power transmitting coil and an NFC transmitting coil, with the NFC transmitting coil fixedly spaced around the main power transmitting coil. The wireless charging printed circuit board body has a first ventilation hole extending along its thickness direction, with the main power transmitting coils spaced around the first ventilation hole. The first ventilation hole is used to supply airflow for heat dissipation to the wireless charging electrical components.

[0024] This wireless charging printed circuit board integrates both the main power transmitting coil and the NFC transmitting coil within its body. When charging the wireless charging electrical components, the system controls the wireless charging printed circuit board to remain powered on, and places the wireless charging components close to the board, ensuring they are within the area of ​​the main power transmitting coil on the board, thus enabling charging. Furthermore, integrating both the main power transmitting coil and the NFC transmitting coil into the wireless charging printed circuit board simplifies its structure and enhances its integration, standardization, and miniaturization.

[0025] By setting a first ventilation hole extending along its thickness on the wireless charging printed circuit board, cold air is simultaneously supplied to the first ventilation hole during the charging process of the wireless charging device. Since the main power transmitting coil is located around the periphery of the first ventilation hole, the cold air supplied to the first ventilation hole can directly blow onto the areas of concentrated heat on the wireless charging device, thereby effectively improving the cooling effect and efficiency of the wireless charging device. Secondly, the cold air supplied to the first ventilation hole can also cool the wireless charging printed circuit board itself, thereby effectively improving the safety and service life of the wireless charging printed circuit board. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the structure of a wireless charging printed circuit board provided in a specific embodiment of this utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of a wireless charging printed circuit board provided in a specific embodiment of this utility model. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the structure of a wireless charging printed circuit board provided in a specific embodiment of this utility model. Figure 3 .

[0029] In the picture:

[0030] 1. Wireless charging printed circuit board body;

[0031] 11. Coil core board; 111. Main power transmitting coil; 112. NFC transmitting coil;

[0032] 12. Magnetic plate; 121. Magnetic material layer; 122. Semi-cured layer;

[0033] 13. Charging control board; 131. First control core board; 1311. Third dielectric material layer; 1312. First ground layer; 1313. Signal transmission layer; 132. Second control core board; 1321. Fourth dielectric material layer; 1322. Second ground layer; 1323. Patch metal layer; 133. Second dielectric material layer;

[0034] 14. Shielding filter layer;

[0035] 15. First dielectric material layer;

[0036] 16. First ventilation hole; 161. Sub-ventilation hole;

[0037] 17. Second ventilation hole;

[0038] 18. Third ventilation hole;

[0039] 19. Connecting hole;

[0040] 2. Components. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] This utility model provides a wireless charging printed circuit board, such as Figure 1-3 As shown, the wireless charging printed circuit board includes a wireless charging printed circuit board body 1 and a coil core board 11 formed within the wireless charging printed circuit board body 1. The coil core board 11 includes a main power transmitting coil 111 and an NFC transmitting coil 112. The NFC transmitting coil 112 is fixed at intervals around the main power transmitting coil 111. The wireless charging printed circuit board body 1 is provided with a first ventilation hole 16 extending along its own thickness direction. The main power transmitting coil 111 is located at intervals around the first ventilation hole 16. The first ventilation hole 16 is used to supply air to the wireless charging electrical components for heat dissipation.

[0046] This wireless charging printed circuit board integrates both the main power transmitting coil 111 and the NFC transmitting coil 112 within its body 1. When charging the wireless charging device, the system controls the printed circuit board to remain powered on and places the device close to it, ensuring it is within the area of ​​the main power transmitting coil 111 on the board, thus enabling charging. Furthermore, integrating both the main power transmitting coil 111 and the NFC transmitting coil 112 into the printed circuit board body 1 simplifies the board's structure and enhances its integration, standardization, and miniaturization.

[0047] By providing a first ventilation hole 16 extending along its thickness on the wireless charging printed circuit board body 1, during the charging process of the wireless charging device, cool air is simultaneously controlled to be supplied to the first ventilation hole 16. Since the main power transmitting coil 111 is spaced around the first ventilation hole 16, the cool air supplied into the first ventilation hole 16 can directly blow onto the area where heat is concentrated on the wireless charging device, thereby effectively improving the cooling effect and efficiency of the wireless charging device. Secondly, the cool air supplied into the first ventilation hole 16 can also cool the wireless charging printed circuit board itself, thereby effectively improving the safety and service life of the wireless charging printed circuit board.

[0048] The coil core board 11 also includes an adhesive layer that connects the main power transmitting coil 111 and the NFC transmitting coil 112, such that the NFC transmitting coil 112 is spaced around the main power transmitting coil 111.

[0049] It is understandable that, such as Figure 1-3 As shown, the first ventilation hole 16 penetrates the wireless charging printed circuit board body 1 along its thickness direction, and also penetrates the adhesive layer of the coil core board 11. Therefore, the first ventilation hole 16 penetrates the wireless charging printed circuit board. The thickness direction of the wireless charging printed circuit board is parallel to the thickness direction of the wireless charging printed circuit board body 1.

[0050] Specifically, such as Figure 1-3 As shown, the main power transmitting coil 111 is a loop-shaped wire winding. The NFC transmitting coil 112 is also a loop-shaped wire winding, and the NFC transmitting coil 112 is fixed to the periphery of the main power transmitting coil 111 by adhesive layers.

[0051] Preferably, such as Figure 1 and Figure 2 As shown, the number of first ventilation holes 16 is one.

[0052] More preferably, such as Figure 1 and Figure 2 As shown, the shape of the first ventilation hole 16 is the same as the winding shape of the main power transmitting coil 111, and the central axis of the first ventilation hole 16 and the central axis of the main power transmitting coil 111 are collinear.

[0053] It is understood that, along any direction perpendicular to the thickness direction of the wireless charging printed circuit board body 1, the first dimension from the central axis of the first ventilation hole 16 to the edge of the first ventilation hole 16 is slightly smaller than the second dimension from the central axis of the main power transmitting coil 111 to the inner peripheral edge of the main power transmitting coil 111.

[0054] Compared to setting the first ventilation hole 16 as multiple spaced sub-ventilation holes 161 with smaller diameters, the ventilation efficiency of the first ventilation hole 16 can be improved. This can further improve the cooling effect and efficiency of the wireless charging electrical components during the charging process, and further improve the cooling effect and efficiency of the wireless charging printed circuit board itself.

[0055] With one first vent 16, the shape of the first vent 16 being the same as the coiled shape of the main power transmitting coil 111, and the central axis of the first vent 16 being collinear with the central axis of the main power transmitting coil 111: it is further preferred that, along any direction perpendicular to the thickness direction of the wireless charging printed circuit board body 1, the second dimension > the first dimension ≥ 0.5 times the second dimension. For example, the first dimension is equal to 0.5 times the second dimension, or the first dimension is equal to 0.6 times the second dimension, or the first dimension is equal to 0.7 times the second dimension, or the first dimension is equal to 0.8 times the second dimension, or the first dimension is equal to 0.9 times the second dimension, or the first dimension is equal to 0.95 times the second dimension, etc. It is understood that the first and second dimensions can be adaptively adjusted according to actual operating conditions.

[0056] More preferably, the shape of the first ventilation hole 16 can be circular or square.

[0057] In this embodiment, as Figure 1 and Figure 2 As shown, the first ventilation hole 16 is square in shape; there is one first ventilation hole 16, and the shape of the first ventilation hole 16 is the same as the coiled shape of the main power transmitting coil 111. The central axis of the first ventilation hole 16 and the central axis of the main power transmitting coil 111 are collinear; in any direction perpendicular to the thickness direction of the wireless charging printed circuit board body 1, the first dimension is slightly smaller than the second dimension.

[0058] As an alternative, the number of first ventilation holes 16 is one; the shape of the first ventilation hole 16 is different from the winding shape of the main power transmitting coil 111, and / or, the central axis of the first ventilation hole 16 and the central axis of the main power transmitting coil 111 are not collinear.

[0059] As an alternative, such as Figure 3 As shown, the first ventilation hole 16 includes a plurality of sub-ventilation holes 161, which are spaced apart on the wireless charging printed circuit board body 1. Further, a first electrical connection layer is fixedly disposed on the inner peripheral wall of the sub-ventilation holes 161. This arrangement not only improves the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself, but also allows for electrical connection between the main power transmitting coil 111 and the control circuit in the charging control board 13, and between the NFC transmitting coil 112 and the control circuit in the charging control board 13, thus integrating the functions of the sub-ventilation holes 161. Further, the electrical connection layer is preferably a copper layer; in other embodiments, the electrical connection layer may also be made of conductive materials such as gold or silver. Further, the shape of the sub-ventilation holes 161 can be circular or square, etc.

[0060] Preferably, such as Figure 1-3 As shown, the extension direction of the first ventilation hole 16 is parallel to the thickness direction of the wireless charging printed circuit board body 1. This improves the efficiency of cool air blowing directly onto the wireless charging components through the first ventilation hole 16, thereby further enhancing the cooling effect and efficiency on the wireless charging components and the wireless charging printed circuit board itself. As an alternative, the extension direction of the first ventilation hole 16 is at an angle to the thickness direction of the wireless charging printed circuit board body 1.

[0061] Optionally, such as Figure 1-3 As shown, the wireless charging printed circuit board body 1 has a second ventilation hole 17 extending along its thickness direction. The second ventilation hole 17 is located between the magnetic material layer 121 and the NFC transmitting coil 112 of the wireless charging printed circuit board body 1, and is used to supply air to the wireless charging electrical components for heat dissipation. The first ventilation hole 16 and the second ventilation hole 17 work together to further improve the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself. The second ventilation hole 17 can be a circular hole or a square hole, etc., and its shape is not limited.

[0062] It is understandable that, such as Figure 1-3 As shown, the second ventilation hole 17 penetrates the wireless charging printed circuit board body 1 along the thickness direction of the wireless charging printed circuit board body 1, and also penetrates the adhesive layer of the coil core board 11.

[0063] Further optional, such as Figure 1-3As shown, the extension direction of the second ventilation hole 17 is parallel to the thickness direction of the wireless charging printed circuit board body 1. As an alternative, the extension direction of the second ventilation hole 17 is at an angle to the thickness direction of the wireless charging printed circuit board body 1.

[0064] Optionally, a second electrical connection layer is fixedly provided on the inner peripheral wall of the second ventilation hole 17. This layer serves to improve the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself, and also serves to electrically connect the main power transmitting coil 111 and the control circuit in the charging control board 13, as well as the NFC transmitting coil 112 and the control circuit in the charging control board 13, thus integrating the functions of the second ventilation hole 17.

[0065] Alternatively, there may be multiple second ventilation holes 17, which are distributed circumferentially around the periphery of the magnetic material layer 121 and are all located between the magnetic material layer 121 and the NFC transmitting coil 112. This can further improve the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself. Figure 1-3 The example shown is simply a case of setting up a second ventilation hole 17.

[0066] Optionally, such as Figure 1-3 As shown, the wireless charging printed circuit board body 1 has a third ventilation hole 18 extending along its own thickness direction. The third ventilation hole 18 is spaced around the NFC transmitting coil 112 and is used to supply air to the wireless charging electrical components for heat dissipation. The first ventilation hole 16 and the third ventilation hole 18 are used together, or the first ventilation hole 16, the second ventilation hole 17 and the third ventilation hole 18 are used together, which can further improve the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself. The third ventilation hole 18 can be a circular hole or a square hole, etc., and its shape is not limited.

[0067] It is understandable that, such as Figure 1-3 As shown, the third ventilation hole 18 penetrates the wireless charging printed circuit board body 1 along the thickness direction of the wireless charging printed circuit board body 1, and also penetrates the adhesive layer of the coil core board 11.

[0068] Further optional, such as Figure 1-3 As shown, the extension direction of the third ventilation hole 18 is parallel to the thickness direction of the wireless charging printed circuit board body 1. As an alternative, the extension direction of the third ventilation hole 18 is at an angle to the thickness direction of the wireless charging printed circuit board body 1.

[0069] Optionally, a third electrical connection layer is fixedly provided on the inner peripheral wall of the third ventilation hole 18. This layer serves to improve the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself, and also serves to electrically connect the main power transmitting coil 111 and the control circuit in the charging control board 13, as well as the NFC transmitting coil 112 and the control circuit in the charging control board 13, thus integrating the functions of the third ventilation hole 18.

[0070] Alternatively, the number of third ventilation holes 18 may be multiple, and the multiple third ventilation holes 18 are distributed at intervals around the NFC transmitting coil 112 in a circumferential direction. This can further improve the cooling effect and efficiency of the wireless charging electrical components and the wireless charging printed circuit board itself. Figure 1-3 The example shown is simply a case of setting up a third ventilation hole 18.

[0071] Among them, such as Figure 1-3 As shown, the wireless charging printed circuit board body 1 also has connecting holes 19 extending along its own thickness direction, and the connecting holes 19 are spaced apart around the NFC transmitting coil 112. The connecting holes 19 are used to fix the setting position of the wireless charging printed circuit board. In this embodiment, four connecting holes 19 are provided for example, the wireless charging printed circuit board body 1 is rectangular, and the four connecting holes 19 are respectively located at the four corners of the wireless charging printed circuit board body 1.

[0072] Printed circuit boards (PCBs) can be classified according to the number of conductor layers into: single-sided boards with copper clad on only one side, double-sided boards with copper clad on both sides, and multilayer boards with multiple copper layers. Multilayer boards are typically composed of multiple copper-clad core boards with copper clad on both sides, combined and stacked with prepreg as needed, and then a copper layer is added to the outermost layer and pressed together under heat and pressure to form a multilayer board with multiple copper layers.

[0073] The wireless charging printed circuit board is a multilayer board.

[0074] Among them, such as Figure 1-3 As shown, the wireless charging printed circuit board body 1 also includes a magnetic board 12 and a charging control board 13. The magnetic board 12 is fixedly formed on one side of the coil core board 11; the magnetic material layer 121 of the magnetic board 12 is in contact with the main power transmitting coil 111, and the NFC transmitting coil 112 is spaced around the magnetic material layer 121. The charging control board 13 is fixedly formed on the side of the magnetic board 12 away from the coil core board 11. The main power transmitting coil 111 is electrically connected to the control circuit in the charging control board 13 through a first via, and the NFC transmitting coil 112 is electrically connected to the control circuit in the charging control board 13 through a second via.

[0075] Specifically, the first via (not shown in the figure) can be a through hole separately disposed on the semi-cured layer 122 of the magnetic plate 12 and the charging control board 13, and the inner peripheral wall of the first via is formed with a fourth electrical connection layer; or, the first via (not shown in the figure) can be a through hole separately disposed on the semi-cured layer 122 of the magnetic plate 12 and the charging control board 13, and the first via is filled with an electrical connection medium; or, the first via includes a sub-ventilation hole 161 and / or a second ventilation hole 17 and / or a third ventilation hole 18. When the first via includes a sub-ventilation hole 161, the inner peripheral wall of the sub-ventilation hole 161 is formed with a first electrical connection layer. When the first via includes a second ventilation hole 17, the inner peripheral wall of the second ventilation hole 17 is formed with a second electrical connection layer. When the first via includes a third ventilation hole 18, the inner peripheral wall of the third ventilation hole 18 is formed with a third electrical connection layer. Further, preferably, the first via is located on the periphery of the NFC transmitting coil 112. That is, preferably, the first via is located in the area near the edge of the wireless charging printed circuit board body 1.

[0076] Specifically, the second via (not shown in the figure) can be a through hole separately disposed on the semi-cured layer 122 of the magnetic plate 12 and the charging control board 13, and the inner peripheral wall of the second via is formed with a fifth electrical connection layer; or, the second via (not shown in the figure) can be a through hole separately disposed on the semi-cured layer 122 of the magnetic plate 12 and the charging control board 13, and the second via is filled with an electrical connection medium; or, the second via includes a sub-ventilation hole 161 and / or a second ventilation hole 17 and / or a third ventilation hole 18. When the second via includes a sub-ventilation hole 161, the inner peripheral wall of the sub-ventilation hole 161 is formed with a first electrical connection layer. When the first via includes a second ventilation hole 17, the inner peripheral wall of the second ventilation hole 17 is formed with a second electrical connection layer. When the first via includes a third ventilation hole 18, the inner peripheral wall of the third ventilation hole 18 is formed with a third electrical connection layer. Further, preferably, the second via is located on the periphery of the NFC transmitting coil 112. That is, the second via is located in the area near the edge of the wireless charging printed circuit board body 1.

[0077] By integrating the main power transmitting coil 111 and the NFC transmitting coil 112 onto the coil core board 11, the coil core board 11, the magnetic board 12, and the charging control board 13 are integrated into a single wireless charging printed circuit board. The main power transmitting coil 111 is electrically connected to the control circuit in the charging control board 13 via a first via, and the NFC transmitting coil 112 is electrically connected to the control circuit in the charging control board 13 via a second via. This further simplifies the structure of the wireless charging printed circuit board and improves its integration, standardization, and miniaturization. Maintaining the thickness of the electrical connection layer ensures the consistency of the DCR (DC resistance) and inductance of the transmitting coil.

[0078] Specifically, such as Figure 1-3As shown, the magnetic plate 12 also includes a semi-cured layer 122, in which a magnetic material layer 121 is embedded and fixed. Specifically, mounting holes / blind slots are formed in the semi-cured layer 122, and the magnetic material layer 121 is embedded in the mounting holes / blind slots to form an integral magnetic plate 12. By setting the magnetic material layer 121 to contact the main power transmitting coil 111 on the side of the coil core plate 11 closest to the magnetic plate 12, the distance between the main power transmitting coil 111 and the magnetic material layer 121 can be reduced, thereby further increasing the inductance of the main power transmitting coil 111.

[0079] Furthermore, the magnetic material layer 121 can be any one of bulk solid, powder solid, and strip solid; the magnetic material layer 121 is made of any one of ferrite, iron powder material, ferromagnetic metal alloy, ferromagnetic amorphous and nanocrystalline material.

[0080] Furthermore, the semi-cured layer 122 functions similarly to adhesive in the multilayer board. In this embodiment, the semi-cured layer 122 is made of PP (polypropylene). During the multilayer board lamination process, under high temperature conditions, the PP in the semi-cured layer 122 will re-enter a fluid state and continue to undergo a polymerization reaction, so that the semi-cured layer 122 can bond the magnetic material layer 121, the NFC transmitting coil 112, and the charging control board 13 into a whole.

[0081] Among them, such as Figure 1-3 As shown, the wireless charging printed circuit board body 1 also includes a shielding filter layer 14 and a first dielectric material layer 15. The shielding filter layer 14 is located on the side of the coil core board 11 away from the magnetic plate 12. The first dielectric material layer 15 is located between the shielding filter layer 14 and the coil core board 11, and the first dielectric material layer 15 is used to fix the shielding filter layer 14 to the coil core board 11.

[0082] The shielding filter layer 14 is mainly used to shield the electric field emitted by the transmitting coil from affecting the outside world, while the magnetic field generated by the transmitting coil can be output normally; the transmitting coil includes the main power transmitting coil 111 and the NFC transmitting coil 112. In this embodiment, the shielding filter layer 14 is made of copper.

[0083] The shielding effect of the shielding filter layer 14 on electric and magnetic fields can be achieved by adjusting the tooth spacing and tooth width on the shielding filter layer 14. The specific structure of the shielding filter layer 14 is prior art and will not be described in detail here.

[0084] In this embodiment, as Figure 1-3 As shown, the exemplary configuration of the charging control board 13 includes a first control core board 131 and a second control core board 132, and a second dielectric material layer 133 located between the first control core board 131 and the second control core board 132; the first control core board 131 is close to the magnetic plate 12 relative to the second dielectric material layer 133.

[0085] In this embodiment, as Figure 1-3 As shown, the first control core board 131 includes a third dielectric material layer 1311 and a first metal conductive layer disposed on the outer surface of the third dielectric material layer 1311. The portion of the first metal conductive layer located between the third dielectric material layer 1311 and the magnetic plate 12 serves as a first ground layer 1312; the portion of the first metal conductive layer opposite to the third dielectric material layer 1311 and away from the magnetic plate 12 serves as a signal transmission layer 1313. In this embodiment, both the first ground layer 1312 and the signal transmission layer 1313 are copper layers, that is, the first metal conductive layer is made of copper.

[0086] In this embodiment, as Figure 1-3 As shown, the second control core board 132 includes a fourth dielectric material layer 1321 and a second metal conductive layer disposed on the outer surface of the fourth dielectric material layer 1321. The portion of the second metal conductive layer located between the fourth dielectric material layer 1321 and the first control core board 131 serves as a second ground layer 1322; the portion of the second metal conductive layer opposite to the fourth dielectric material layer 1321 and away from the first control core board 131 serves as a patch metal layer 1323, which is electrically connected to component 2. In this embodiment, both the second ground layer 1322 and the patch metal layer 1323 are copper layers, meaning the second metal conductive layer is made of copper. The control circuit in the charging control board 13 is distributed across the first ground layer 1312, the signal transmission layer 1313, the second ground layer 1322, and the patch metal layer 1323. The specific structure of the control circuit is prior art and will not be described in detail here.

[0087] In this embodiment, the exemplary dielectric material layer is made of epoxy glass. That is, the first dielectric material layer 15, the second dielectric material layer 133, the third dielectric material layer 1311, and the third dielectric material layer 1311 are all made of epoxy glass.

[0088] In this embodiment, the shielding filter layer 14, the first ground layer 1312, and the second ground layer 1322 are preferably electrically connected through a first via and a second via located on the outer periphery of the NFC transmitting coil 112 on the wireless charging printed circuit board. This ensures that a stable cage-like structure is formed around the wireless charging printed circuit board to improve electromagnetic compatibility performance.

[0089] like Figure 1-3 As shown, the wireless charging printed circuit board consists of six layers of copper foil:

[0090] The shielding filter layer 14 occupies the first copper layer and is mainly used to shield the electric field emitted by the transmitting coil from affecting the outside, while the magnetic field generated by the transmitting coil can be output normally.

[0091] The main power transmitting coil 111 and the NFC transmitting coil 112 occupy the second copper layer. The NFC transmitting coil 112 is fixed at a distance from the periphery of the main power transmitting coil 111, and the distance is located at the periphery of the magnetic material layer 121. The main power transmitting coil 111 is used to generate a magnetic field, thereby providing energy to the wireless charging electrical components. The width and thickness of the main power transmitting coil 111 can be calculated according to actual working conditions. The NFC transmitting coil 112 is mainly used to detect whether there are metal foreign objects and NFC cards on the transmitting surface. The calculation method of the width and thickness of the main power transmitting coil 111 is existing technology and will not be described in detail here.

[0092] The magnetic material layer 121 is crucial for ensuring the inductance of the main power transmitting coil 111. The final inductance of the main power transmitting coil 111 and the magnetic material layer 121 combined must meet the requirements of the WPC (Wireless Power Consortium) Qi charging specification. Embedding the magnetic material layer 121 within the prepreg layer 122 to form an integrated structure allows the resulting magnetic plate 12 to increase the inductance of the main power transmitting coil 111, and the prepreg layer 122 also serves to bond the coil core board 11 and the charging control board 13.

[0093] The charging control board 13 occupies the third to sixth copper layers. Specifically, the first ground layer 1312 occupies the third copper layer. The signal transmission layer 1313 occupies the fourth copper layer. The second ground layer 1322 occupies the fifth copper layer. The surface mount metal layer 1323 occupies the sixth copper layer. All components 2 are located on the sixth copper layer, single-sided surface mount. This means that components 2 are located on the side of the second control core board 132 furthest from the first control core board 131. This arrangement effectively ensures that the SMT (Surface Mount Technology) process is completed in one pass, and that all components 2 on the charging control board 13 can be well dissipated to the outside environment.

[0094] The shielding filter layer 14, the first ground layer 1312, and the second ground layer 1322 are electrically connected through the first and second vias located on the outer periphery of the NFC transmitting coil 112 on the wireless charging printed circuit board, ensuring that a stable cage structure is formed around the wireless charging printed circuit board to improve electromagnetic compatibility performance.

[0095] This utility model also provides a wireless charging device, which includes a cooling channel and the aforementioned wireless charging printed circuit board; the cooling channel includes a first ventilation hole 16, or the cooling channel passes through the first ventilation hole 16. This effectively improves the cooling effect and efficiency of the wireless charging electrical components, and also cools the wireless charging printed circuit board itself.

[0096] Specifically, the wireless charging device includes a housing (not shown in the figure), and a wireless charging printed circuit board body 1 is fixedly disposed inside the housing. The housing has a cooling output hole communicating with the first ventilation hole 16. The cold air output from the cooling channel blows directly onto the area on the wireless charging device where heat is concentrated through the cooling output hole. Specifically, the wireless charging printed circuit board body 1 is fixed inside the housing through a connection hole 19.

[0097] Furthermore, the housing is also provided with a placement slot that communicates with the cooling output hole, and the placement slot and the cooling flow channel are located on both sides of the cooling output hole; the placement slot is used to place wireless charging devices.

[0098] Furthermore, the housing is also equipped with an air supply structure (not shown in the figure) that supplies air to the cooling channel, such as a fan, and the housing is also equipped with an air inlet that connects the air supply structure to the outside.

[0099] In this embodiment, as Figure 1-3 As shown, the wireless charging printed circuit board includes a main power transmitting coil 111 and an NFC transmitting coil 112. The wireless charging printed circuit board is located within the orthographic projection of the placement slot along the depth direction.

[0100] In this embodiment, the shape of the placement slot is identical to the shape of the wireless charging device. The size of the placement slot is slightly larger than the size of the wireless charging device. For example, the size of the placement slot is 1.2 times the size of the wireless charging device, or 1.3 times the size of the wireless charging device, etc.

[0101] It can limit the placement position of wireless charging devices during charging, ensuring that wireless charging devices can always be effectively charged when placed in the placement slot, and can also ensure that the cold air output from the cooling channel blows directly onto the area of ​​the wireless charging device where heat is concentrated through the cooling output hole, and can effectively reduce manufacturing costs.

[0102] In other embodiments, multiple sets of coils can be arranged within the wireless charging printed circuit board. These coils are spaced completely apart on a plane perpendicular to the body 1 of the wireless charging printed circuit board. Each set of coils includes a main power transmitting coil 111 and an NFC transmitting coil 112. Each set of coils is correspondingly provided with a first ventilation hole 16, a second ventilation hole 17, a third ventilation hole 18, a first via, and a second via. The wireless charging printed circuit board is located within the orthographic projection of the placement slot along its depth direction. It is understood that in this case, the size of the placement slot is much larger than the size of the wireless charging device.

[0103] In this embodiment, there is one wireless charging printed circuit board. It can charge one wireless charging device simultaneously.

[0104] In other embodiments, the number of wireless charging printed circuit boards is at least two; the at least two wireless charging printed circuit boards are formed into a single integral structure, or the at least two wireless charging printed circuit boards are independently disposed within the housing. Furthermore, each wireless charging printed circuit board is provided with a cooling output hole and a placement slot, enabling simultaneous charging of at least two wireless charging devices.

[0105] The wireless charging printed circuit board is the charger body, and the main power transmitting coil 111 is the wireless charging coil.

[0106] This utility model provides a vehicle including the aforementioned wireless charging device. By adopting the aforementioned wireless charging device, the safety and reliability of wireless charging devices in the vehicle can be effectively improved, and the energy consumption, design cost, and production cost of the vehicle can be effectively reduced.

[0107] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A wireless charging printed circuit board, characterized in that, The device includes a wireless charging printed circuit board body (1) and a coil core board (11) formed in the wireless charging printed circuit board body (1). The coil core board (11) includes a main power transmitting coil (111) and an NFC transmitting coil (112). The NFC transmitting coil (112) is fixed at intervals around the main power transmitting coil (111). The wireless charging printed circuit board body (1) is provided with a first ventilation hole (16) extending along its own thickness direction, and the main power transmitting coil (111) is spaced around the first ventilation hole (16); the first ventilation hole (16) is used to supply air to the wireless charging electrical components for heat dissipation.

2. The wireless charging printed circuit board according to claim 1, characterized in that, The extension direction of the first ventilation hole (16) is parallel to the thickness direction of the wireless charging printed circuit board body (1).

3. The wireless charging printed circuit board according to claim 1, characterized in that, The first ventilation hole (16) includes a plurality of sub-ventilation holes (161), which are spaced apart on the wireless charging printed circuit board body (1).

4. The wireless charging printed circuit board according to claim 3, characterized in that, The inner peripheral wall of the sub-ventilation hole (161) is fixedly provided with a first electrical connection layer.

5. The wireless charging printed circuit board according to any one of claims 1-4, characterized in that: The wireless charging printed circuit board body (1) has a second ventilation hole (17) extending along its thickness direction. The second ventilation hole (17) is located between the magnetic material layer (121) of the wireless charging printed circuit board body (1) and the NFC transmitting coil (112). The second ventilation hole (17) is used to supply air to the wireless charging electrical components for heat dissipation; and / or, The wireless charging printed circuit board body (1) is provided with a third ventilation hole (18) that runs through its own thickness direction. The third ventilation hole (18) is located at intervals around the NFC transmitting coil (112). The third ventilation hole (18) is used to supply air to the wireless charging electrical components for heat dissipation.

6. The wireless charging printed circuit board according to any one of claims 1-4, characterized in that, The wireless charging printed circuit board body (1) also includes: A magnetic plate (12) is fixedly formed on one side of the coil core plate (11); the magnetic material layer (121) of the magnetic plate (12) is in contact with the main power transmitting coil (111), and the NFC transmitting coil (112) is spaced around the magnetic material layer (121); A charging control board (13) is fixedly formed on the side of the magnetic plate (12) away from the coil core plate (11). The main power transmitting coil (111) is electrically connected to the control circuit in the charging control board (13) through a first through hole, and the NFC transmitting coil (112) is electrically connected to the control circuit in the charging control board (13) through a second through hole.

7. The wireless charging printed circuit board according to claim 6, characterized in that, The magnetic plate (12) further includes a semi-cured layer (122), and the magnetic material layer (121) is embedded and fixed in the semi-cured layer (122).

8. The wireless charging printed circuit board according to claim 6, characterized in that, The wireless charging printed circuit board body (1) also includes: A shielding filter layer (14) is located on the side of the coil core plate (11) away from the magnetic plate (12); A first dielectric material layer (15) is located between the shielding filter layer (14) and the coil core plate (11), and the first dielectric material layer (15) is used to fix the shielding filter layer (14) to the coil core plate (11).

9. A wireless charging device, characterized in that, It also includes the wireless charging printed circuit board according to any one of claims 1-8; the cooling channel includes the first ventilation hole (16), or the cooling channel passes through the first ventilation hole (16).

10. A vehicle, characterized in that, Includes the wireless charging device as described in claim 9.

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