Wireless charging transmitting device and charging system
By incorporating a cavity and heat dissipation structure into the wireless charging transmitter, the problem of poor heat dissipation from the circuit board is solved, achieving effective heat dissipation and ensuring the stable operation of the circuit board and electronic components.
Patent Information
- Application Number
- CN202423061183.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
The heat generated by the wireless charging transmitter during operation cannot be effectively dissipated, leading to a decline in the electrical performance of the circuit board and affecting the stability of electronic components and current transmission.
In the wireless charging transmitter, a cavity is set inside the shell body. The circuit board assembly includes a substrate and a heat sink. The heat sink is in contact with the inner wall of the cavity. The outer wall of the shell body is provided with a heat dissipation structure, and heat dissipation is achieved quickly through heat transfer and heat dissipation structure.
It effectively improves the heat dissipation of the circuit board components inside the wireless charging transmitter, keeps the device temperature stable, and improves the electrical performance of the circuit board and the stability of electronic components.
Smart Images
Figure CN223456809U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wireless charging technical field, specifically, relate to a kind of wireless charging transmission device and charging system. BACKGROUND
[0002] At present, some electric bicycles begin to adopt wireless charging technology. The main principle of this technology is to install a wireless charging transmission device on the ground. When the electric bicycle stops in a specific area, the wireless charging receiver on the vehicle is paired with the wireless charging transmission device on the ground, thereby realizing wireless power transmission.
[0003] In the prior art, the wireless charging transmission device includes a shell body and a circuit board arranged inside the shell body. However, the inventor found that during actual use, the circuit board generates a large amount of heat energy during operation. Over time, this may affect the electrical performance of the circuit board, leading to a decrease in the electrical conductivity of electronic devices, causing current transmission problems, making the electronic components in the circuit board unstable and even unable to work normally. SUMMARY
[0004] The problem solved by the utility model is how to improve the heat dissipation of the circuit board inside the wireless charging transmission device.
[0005] In a first aspect, the utility model provides a wireless charging transmission device, including circuit board assembly and shell body;The shell body is internally provided with a cavity;The circuit board assembly includes a substrate and a heat sink arranged on the substrate;The substrate is fixed to the cavity, and the heat sink is in contact with the first inner wall of the cavity to achieve heat transfer;The outer wall of the shell body corresponding to the first inner wall is provided with a first heat dissipation structure.
[0006] Optionally, the heat sink includes a fixed plate and a plurality of first heat dissipation fins;The fixed plate is fixedly connected with the substrate;The first heat dissipation fins are connected at an angle with the fixed plate and in contact with the first inner wall;A plurality of first heat dissipation fins are parallel and spaced apart on the fixed plate.
[0007] Optionally, one end surface of the fixed plate along the thickness direction is fixedly connected with the substrate;The other end surface of the fixed plate along the thickness direction is connected with a plurality of first heat dissipation fins.
[0008] Optionally, the first heat dissipation structure includes a plurality of second heat dissipation fins;The second heat dissipation fins are connected at an angle with the outer wall of the shell body, and a plurality of second heat dissipation fins are parallel and spaced apart on the outer wall of the shell body.
[0009] Optionally, a plurality of second heat dissipation fins are flush at one end away from the shell body.
[0010] Optionally, the first heat dissipation structure is a heat dissipation groove structure arranged on the shell body.
[0011] Optionally, the wireless charging transmitting device further comprises a wireless charging coil assembly and a support column capable of conducting heat; the wireless charging coil assembly is fixed in the cavity; one end of the support column is fixedly connected with the first inner wall, and the other end is in contact with the wireless charging coil assembly.
[0012] Optionally, the wireless charging coil assembly comprises a coil body and a magnetic isolation sheet; one end surface of the magnetic isolation sheet in the thickness direction is fixedly connected with the coil body, and the other end surface is in contact with the magnetic isolation sheet.
[0013] Optionally, the wireless charging transmitting device further comprises a potting glue capable of conducting heat, and the circuit board assembly is fixed in the cavity through the solidified potting glue; and part of the solidified potting glue is in contact with the first inner wall.
[0014] In the second aspect, the utility model provides a kind of charging system, including electric cabinet and the wireless charging transmitting device as described above.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] In the structure of the wireless charging transmitting device, the cavity is arranged in the shell body, which can be used to place components; the circuit board assembly includes a substrate and a heat sink arranged on the substrate; the substrate is fixed in the cavity and can be used to install electronic components; the heat sink is in contact with the first inner wall of the cavity to realize heat transfer, and the heat sink can be used to dissipate heat from the substrate; the outer wall of the shell body corresponding to the first inner wall is provided with a first heat dissipation structure; in this way, part of the heat on the substrate is first transferred to the heat sink, then transferred to the first inner wall of the cavity through the heat sink, and then transferred to the outer wall of the shell body corresponding to the first inner wall, and finally rapidly dissipated through the first heat dissipation structure. In summary, the wireless charging transmitting device of the utility model can effectively improve the heat dissipation of the circuit board assembly inside the wireless charging transmitting device. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is an explosion schematic view of the wireless charging transmitting device of the utility model embodiment;
[0018] Figure 2 It is a structural schematic view of the circuit board assembly of the utility model embodiment;
[0019] Figure 3 It is a bottom view of the base of the utility model embodiment Figure 1 ;
[0020] Figure 4 It is a bottom view of the base of the utility model embodimentFigure 2 .
[0021] Reference Signs List:
[0022] 1, shell body; 11, cover plate; 12, base; 13, cavity; 2, circuit board assembly; 21, substrate; 22, heat sink; 221, fixing plate; 222, first heat dissipation fin; 3, first heat dissipation structure; 31, second heat dissipation fin; 32, heat dissipation groove structure; 4, wireless charging coil assembly; 41, coil body; 42, magnetic isolation sheet; 5, support column. DETAILED DESCRIPTION
[0023] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to make the present application more thorough and complete. It should be understood that the drawings and embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of protection of the present application.
[0024] The Z-axis in the drawings represents the vertical direction, that is, the up-down position, and the positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side; the X-axis in the drawings represents the horizontal direction, and is designated as the left-right position, and the positive direction of the X-axis represents the right side, and the negative direction of the X-axis represents the left side; the Y-axis in the drawings represents the front-rear position, and the positive direction of the Y-axis represents the front side, and the negative direction of the Y-axis represents the rear side. It should be noted that the meanings of the aforementioned Z-axis, Y-axis and X-axis are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.
[0025] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to"; the term "based on" is "based, at least in part, on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions of other terms will be given in the following description. It should be noted that the "first", "second", and the like concepts mentioned in the present application are only used to distinguish different devices, modules or units, and are not intended to limit the functions performed by these devices, modules or units or their mutual dependency.
[0026] It should be noted that the modification of "one" and "multiple" in the utility model is illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise explicitly indicated in the context, it should be understood as "one or more".
[0027] In the prior art, after the wireless charging transmitting device is installed, its upper surface is exposed to the ground surface, and other parts are located underground, and the heat dissipation is mainly through the part of the wireless charging transmitting device located underground. When the wireless charging transmitting device works, a large amount of heat energy is generated on the circuit board inside the wireless charging transmitting device, thereby increasing the temperature inside the wireless charging transmitting device. Since the charging time of the electric bicycle is generally long, if the heat is not discharged in time, the electrical performance of the circuit board may be affected, the electrical conductivity of the electronic device is reduced, the current transmission problem is caused, the electronic components in the circuit board work unstably, and even cannot work normally.
[0028] In order to solve this problem, the utility model provides a wireless charging transmitting device, which comprises a circuit board assembly 2 and a shell body 1; the shell body 1 is internally provided with a cavity 13; the circuit board assembly 2 comprises a substrate 21 and a heat sink 22 arranged on the substrate 21; the substrate 21 is fixed to the cavity 13, and the heat sink 22 is in contact with the first inner wall of the cavity 13 to realize heat transfer; the outer wall of the shell body 1 corresponding to the first inner wall is provided with a first heat dissipation structure 3.
[0029] Specifically, the shape of the shell body 1 can be a cylindrical shape, a square shape or other irregular shapes, which is not limited here and is determined according to actual needs. Figure 1 As shown in the figure, the shell body 1 is similar to a cylindrical shape as a whole, and the cavity 13 is arranged in the shell body 1, and the depth of the cavity 13 is generally between 10cm and 18cm; the substrate 21 of the circuit board assembly 2 is fixed in the cavity 13, and the connection mode of the two includes but is not limited to adhesion or screw connection; the electronic components are installed on the substrate 21, and the heat on the substrate 21 is generated by the working heat of the electronic components arranged thereon; the heat sink 22 is in contact with the first inner wall (that is, the inner bottom wall) of the cavity 13 to realize heat transfer; the outer wall (that is, the bottom wall) of the shell body 1 corresponding to the first inner wall is provided with the first heat dissipation structure 3.
[0030] In the embodiment, when the wireless charging transmitting device works, part of the heat on the substrate 21 is first transferred to the heat sink 22, then transferred to the first inner wall of the cavity 13 through the heat sink 22, then transferred to the outer wall of the shell body 1 corresponding to the first inner wall, and finally rapidly dissipated through the first heat dissipation structure 3. In summary, the wireless charging transmitting device of the utility model can effectively improve the heat dissipation of the circuit board assembly 2 inside the wireless charging transmitting device.
[0031] Further, the shell body 1 comprises upper and lower parts, as shown inFigure 1 As shown, the shell body 1 includes a base 12 and a cover plate 11, wherein the cover plate 11 is disc-shaped and used to cooperate with the wireless receiving module of the electric bicycle; the base 12 is cylindrical in shape as a whole, and is internally provided with a slot structure with an open upper end; the cover plate 11 is arranged at the opening of the slot structure to open or close the opening of the slot structure, and the cover plate 11 and the slot structure form a cavity 13 when the cover plate 11 closes the opening of the slot structure.
[0032] In this optional embodiment, when assembling the wireless charging transmitting device, since the shell body 1 is divided into two parts, it is convenient to install the circuit board assembly 2 and the wireless charging coil assembly 4 in the cavity 13 of the shell body 1.
[0033] Optionally, the heat sink 22 includes a fixing plate 221 and a plurality of first heat dissipation fins 222; the fixing plate 221 is fixedly connected with the base plate 21; the first heat dissipation fins 222 are connected with the fixing plate 221 at an angle and are in contact with the first inner wall; a plurality of the first heat dissipation fins 222 are parallel and spaced apart on the fixing plate 221.
[0034] Specifically, the fixing plate 221 and the first heat dissipation fins 222 are both made of heat-conducting materials, such as aluminum alloy; the number of the first heat dissipation fins 222 can be five or six, etc., which is not limited here and is determined according to actual needs, such as Figure 2 As shown, the fixing plate 221 is rectangular in shape as a whole and is fixedly connected with the base plate 21, and the connection modes include but are not limited to adhesion or screw connection; twelve first heat dissipation fins 222 are respectively connected with the fixing plate 221 perpendicularly, and the twelve first heat dissipation fins 222 are parallel and spaced apart, and the spacing between adjacent two first heat dissipation fins 222 ranges from 3 cm to 5 cm.
[0035] In this optional embodiment, since the heat sink 22 includes the fixing plate 221 and a plurality of first heat dissipation fins 222, and the fixing plate 221 is fixedly connected with the base plate 21, such a design can ensure the stability and reliability of the structure of the heat sink 22. The first heat dissipation fins 222 are connected with the fixing plate 221 at an angle and are in contact with the first inner wall, and such a layout can maximize the heat dissipation area and improve the heat exchange efficiency. A plurality of the first heat dissipation fins 222 are parallel and spaced apart on the fixing plate 221, and such a design not only helps to uniformly distribute heat, but also promotes air flow through the intervals between the fins, further enhancing the heat dissipation effect. In summary, such a heat sink 22 design can effectively improve the heat dissipation performance and maintain the temperature stability of the equipment during operation.
[0036] In one embodiment, one end surface (i.e. the top end surface) of the fixing plate 221 along the thickness direction is fixedly connected with the base plate 21; and the other end surface (i.e. the bottom end surface) of the fixing plate 221 along the thickness direction is connected with the plurality of first heat dissipation fins 222. In this way, the contact area between the fixing plate 221 and the base plate 21 is relatively large, which can increase the heat dissipation efficiency. At the same time, the space utilization in the direction of the Z axis can be improved.
[0037] It should be understood that, although the above embodiment discloses the mode that one end surface of the fixing plate 221 along the thickness direction is fixedly connected with the base plate 21, the mode that one end surface of the fixing plate 221 along the length direction or the width direction is fixedly connected with the base plate 21 is not excluded.
[0038] Optionally, the first heat dissipation structure 3 comprises a plurality of second heat dissipation fins 31; the second heat dissipation fins 31 are connected with the outer wall of the shell body 1 at an angle, and the plurality of second heat dissipation fins 31 are arranged in parallel and at intervals on the outer wall of the shell body 1.
[0039] Specifically, the number of the second heat dissipation fins 31 can be six, eight or ten, etc., which is not limited here and is determined according to actual needs. As shown in Figure 3 fourteen second heat dissipation fins 31 are integrally formed with the shell body 1 and are arranged perpendicularly to the bottom wall of the shell body 1; and the fourteen second heat dissipation fins 31 are arranged in parallel and at intervals, and the interval between two adjacent second heat dissipation fins 31 ranges from 3cm to 5cm.
[0040] In this optional embodiment, the second heat dissipation fins 31 are connected with the outer wall of the shell body 1 at an angle, which can maximize the heat dissipation area and improve the heat exchange efficiency. The plurality of second heat dissipation fins 31 are arranged in parallel and at intervals on the shell body 1, which not only helps to uniformly distribute heat, but also promotes air flow through the intervals between the fins, further enhancing the heat dissipation effect.
[0041] Optionally, the plurality of second heat dissipation fins 31 are flush arranged away from one end of the shell body 1.
[0042] Specifically, as shown in Figure 3 the number of the second heat dissipation fins 31 is fourteen, and the fourteen second heat dissipation fins 31 are flush arranged away from one end (i.e. the bottom end) of the shell body 1, that is, the bottom ends of the fourteen second heat dissipation fins 31 are located on the same horizontal plane.
[0043] In this optional embodiment, when the shell body 1 is produced, since the second heat dissipation fins 31 are flush arranged away from one end of the shell body 1, the shell body 1 can be placed stably.
[0044] Optionally, the first heat dissipation structure 3 is a heat dissipation groove structure 32 arranged on the shell body 1.
[0045] Specifically, as shown in the figure, Figure 4 the first heat dissipation structure 3 is a heat dissipation groove structure 32 arranged on the bottom wall of the shell body 1, and the number of the heat dissipation groove structures 32 can be three, four, or five, etc., which is not limited here and is determined according to actual needs.
[0046] In this optional embodiment, the first heat dissipation structure 3 is designed as the heat dissipation groove structure 32 on the shell body 1, which can make full use of the surface of the shell to dissipate heat, increase the heat dissipation area, and the shape and layout of the heat dissipation groove can help air flow and improve heat exchange efficiency, thereby effectively reducing the working temperature of the device.
[0047] Optionally, the wireless charging transmitting device further comprises a wireless charging coil assembly 4 and a heat-conducting support column 5; the wireless charging coil assembly 4 is fixed in the cavity 13; one end of the support column 5 is fixedly connected with the first inner wall, and the other end is in contact with the wireless charging coil assembly 4.
[0048] Specifically, the support column 5 has heat conduction characteristics, which can be linear or curved, which is not limited here and is determined according to actual needs. As shown in the figure, Figure 1 the support column 5 is linear and stands in the cavity 13 along the depth direction (i.e., the direction of the Z-axis) of the cavity 13, the lower end of the support column 5 is connected with the bottom wall of the cavity 13, and the connection modes include but are not limited to welding or screw connection; the top end of the support column 5 is in contact with the wireless charging coil assembly 4.
[0049] In this optional embodiment, when the wireless charging coil assembly 4 is working, part of the heat generated by the wireless charging coil assembly 4 can be transmitted to the inner bottom wall of the cavity 13 through the heat-conducting support column 5, so as to accelerate the heat dissipation efficiency of the wireless charging coil assembly 4.
[0050] Optionally, the wireless charging coil assembly 4 comprises a coil body 41 and a magnetic separation sheet 42; one end face of the magnetic separation sheet 42 along the thickness direction is fixedly connected with the coil body 41, and the other end face is in contact with the magnetic separation sheet 42.
[0051] Specifically, the shape of the magnetic separation sheet 42 can be circular, square, or other irregular shapes, which is not limited here and is determined according to actual needs. As shown in the figure, Figure 1 the shape of the magnetic separation sheet 42 is circular, the upper end face of the magnetic separation sheet 42 is provided with the coil body 41, the coil body 41 is electrically connected with the circuit board assembly 2; and the lower end face of the magnetic separation sheet 42 is fixedly connected with the other end of the support column 5.
[0052] In the optional embodiment, the magnetic isolation sheet 42 has the following effects: first, the magnetic isolation sheet 42 has high magnetic permeability, can concentrate the magnetic field generated by the coil body 41, make the magnetic induction lines closely surround around the magnetic isolation sheet 42 as the center, increase the electromagnetic induction intensity, and improve the electromagnetic conversion efficiency; second, the magnetic isolation sheet 42 can effectively block the influence of the magnetic field on the surrounding metal objects, reduce the attenuation interference of the metal objects on the magnetic field, prevent energy waste, and improve the charging efficiency; third, the magnetic isolation sheet 42 plays a role of transferring heat to the support column 5.
[0053] Optionally, the wireless charging transmitting device further comprises a heat-conducting potting adhesive, and the circuit board assembly 2 is fixed in the cavity 13 by the solidified potting adhesive.
[0054] Specifically, the material of the potting adhesive comprises silica gel or epoxy resin. The circuit board assembly 2 is fixed in the cavity 13 by the solidified potting adhesive, and the bottom of the solidified potting adhesive is in contact with the first inner wall of the cavity 13.
[0055] In the optional embodiment, the potting adhesive has good adhesion and electrical insulation, can realize good adhesion with many substrates after solidification, and ensures safety. Meanwhile, the potting adhesive can wrap the heat sink 22 to realize heat exchange with the heat sink 22, thereby accelerating heat dissipation of the heat sink 22.
[0056] The embodiment of the utility model provides a kind of charging system, including electric cabinet and the wireless charging transmitting device as described above.
[0057] Specifically, the electric cabinet is erected on the ground, and the circuit system in its interior has multiple electric energy output ports. Each electric energy output port can be electrically connected with the circuit board assembly 2 of the wireless charging transmitting device through an electric connecting line, so as to realize the distribution of electric energy through the electric cabinet and the wireless transmission of electric energy through the corresponding wireless charging transmitting device.
[0058] Although the utility model discloses as above, the protection scope of the utility model is not limited to this only. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall within the protection scope of the application.
Claims
1. A wireless charging transmitting device, characterized in that, The application relates to a wireless charging transmitting device, which comprises a circuit board assembly (2) and a shell body (1); the shell body (1) is internally provided with a cavity (13); the circuit board assembly (2) comprises a substrate (21) and a heat sink (22) arranged on the substrate (21); the substrate (21) is fixed to the cavity (13), and the heat sink (22) is in contact with a first inner wall of the cavity (13) to realize heat transfer; a first heat dissipation structure (3) is arranged on an outer wall of the shell body (1) corresponding to the first inner wall.
2. The wireless charging launch device of claim 1, wherein, The heat sink (22) comprises a fixing plate (221) and a plurality of first heat dissipation fins (222); the fixing plate (221) is fixedly connected with the substrate (21); the first heat dissipation fins (222) are connected with the fixing plate (221) at an angle and are in contact with the first inner wall; the first heat dissipation fins (222) are parallel and arranged at intervals on the fixing plate (221).
3. The wireless charging launch device of claim 2, wherein, One end surface of the fixing plate (221) along the thickness direction is fixedly connected with the substrate (21); the other end surface of the fixing plate (221) along the thickness direction is connected with the first heat dissipation fins (222).
4. The wireless charging launch device of claim 1, wherein, The first heat dissipation structure (3) comprises a plurality of second heat dissipation fins (31); the second heat dissipation fins (31) are connected with the outer wall of the shell body (1) at an angle, and the second heat dissipation fins (31) are parallel and arranged at intervals on the outer wall of the shell body (1).
5. The wireless charging launch device of claim 4, wherein, The second heat dissipation fins (31) are flush arranged away from one end of the shell body (1).
6. The wireless charging launch device of claim 1, wherein, The first heat dissipation structure (3) is a heat dissipation groove structure (32) arranged on the shell body (1).
7. The wireless charging launch device of claim 1, wherein, The application further comprises a wireless charging coil assembly (4) and a heat-conducting support column (5); the wireless charging coil assembly (4) is fixed in the cavity (13); one end of the support column (5) is fixedly connected with the first inner wall, and the other end is in contact with the wireless charging coil assembly (4).
8. The wireless charging launch device of claim 7, wherein, The wireless charging coil assembly (4) comprises a coil body (41) and a magnetic separation sheet (42); one end surface of the magnetic separation sheet (42) along the thickness direction is fixedly connected with the coil body (41), and the other end surface is in contact with the magnetic separation sheet (42).
9. The wireless charging launch device of claim 1, wherein, The application further comprises heat-conducting potting glue, the circuit board assembly (2) is fixed in the cavity (13) through the solidified potting glue; and part of the solidified potting glue is in contact with the first inner wall.
10. A charging system, characterized by The application further comprises a wireless charging transmitting device, which comprises a circuit board assembly (2) and a shell body (1); the shell body (1) is internally provided with a cavity (13); the circuit board assembly (2) comprises a substrate (21) and a heat sink (22) arranged on the substrate (21); the substrate (21) is fixed to the cavity (13), and the heat sink (22) is in contact with a first inner wall of the cavity (13) to realize heat transfer; a first heat dissipation structure (3) is arranged on an outer wall of the shell body (1) corresponding to the first inner wall.