A mounting structure for a wireless charging foreign object detection device
By incorporating a contoured groove and encapsulation cover on the cover of the wireless charging device, the problems of slow heat conduction and improper distance in the foreign object detection device are solved, enabling rapid detection and simplifying the internal structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANJIE WIRELESS TECH (SUZHOU) CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-24
AI Technical Summary
In existing wireless charging devices, the foreign object detection device is located under the cover, which results in excessively long heat conduction time and slow response speed. Furthermore, improper distance between the foreign object detection device and the Litz coil affects detection efficiency and product thickness.
A contoured groove is provided on the cover plate to house the foreign object detection device, and it is sealed with an encapsulation cover plate to reduce the heat transfer distance and the distance between the foreign object detection device and the Litz coil. A flexible circuit board and wiring through slot design are adopted.
It improves the response speed of foreign object detection, reduces the complexity of the internal structure and layout difficulty of the product, and enhances detection efficiency.
Smart Images
Figure CN224555992U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of wireless charging equipment, specifically to an installation structure for a wireless charging foreign object detection device. Background Technology
[0002] During wireless charging, it is necessary to detect the presence of foreign objects on the surface of the wireless charging transmitter or receiver to ensure the safe and reliable operation of the wireless charging process. Existing foreign object detection devices are generally a combination of circuit boards and array sensors. The circuit boards can be flexible or rigid. In actual deployment, the foreign object detection devices are placed inside the wireless charging product. The foreign object detection device detects the temperature of foreign objects located on the surface of the cover to obtain relevant data and locate the presence of foreign objects. Because the foreign object detection device is located in the space below the cover, and the existing cover has a relatively thick wall, the heat conduction time is relatively long, resulting in a slow reaction speed for foreign object detection. Furthermore, during the assembly of the foreign object detection device, its distance from the Litz coil cannot be too close or too far. If it is too close, the foreign object detection device will be interfered with by the heat generated by the Litz coil; if it is too far, the thickness of the wireless charging product will increase. Therefore, there is an urgent need to develop a structure suitable for the installation of foreign object detection devices in wireless charging, thereby improving foreign object detection efficiency and reducing the difficulty of internal structural layout in wireless charging products. Utility Model Content
[0003] To address the aforementioned issues, this utility model provides an installation structure for a wireless charging foreign object detection device, which improves foreign object detection efficiency and reduces the difficulty of internal structural layout in wireless charging products.
[0004] A mounting structure for a wireless charging foreign object detection device, characterized in that it comprises: Foreign object detection device; The cover plate has a contoured groove on its upper surface corresponding to the surface area of the foreign object detection device. And the encapsulation cover; The foreign object detection device is placed in the contoured lower groove. The encapsulation cover is shaped to conform to the contour edge of the contoured lower groove. The encapsulation cover is installed on the upper surface of the foreign object detection device, and the outer edge of the encapsulation cover is closely attached to the upper edge contour edge of the contoured lower groove. The thickness of the encapsulation cover is less than the thickness of the upper plate of the cover without the contoured lower groove. The upper plate of the cover is also provided with a corresponding wiring through groove. The corresponding lead end of the foreign object detection device passes through the wiring through groove and extends into the inner cavity of the wireless charging product, and is directly or indirectly connected to the corresponding port of the control board.
[0005] Its further features are: The foreign object detection device is assembled from a single circuit board and several sensors. At this time, the lead end of the single circuit board is a set of lead-out ribbon cables located on the side, and the wiring through slot is a single wiring through slot corresponding to the lead end. The foreign object detection device consists of four circuit boards spliced together to form a rectangular detection area. The lead ends of the sensors are located on the corresponding sides of the two circuit boards on the same side. There are four wiring through slots, and each wiring through slot is set at the corresponding position of the lead end of each circuit board. The circuit board of the foreign object detection device is a flexible circuit board or a rigid circuit board; Preferably, the circuit board of the foreign object detection device is a flexible circuit board; Preferably, the lead wires of the circuit board pass through the periphery of the Litz coil below and are connected to the corresponding port of the control board; The encapsulation cover is attached to the periphery of the contoured lower groove with adhesive to ensure a sealed connection.
[0006] By adopting the above technical solution, a contoured groove is reserved on the upper plate of the cover to house the foreign object detection device. The device is then encapsulated by a sealing cover. Since the thickness of the sealing cover is less than the thickness of the upper plate of a cover without the contoured groove, the foreign object detection device is placed closer to the foreign object, reducing heat transfer distance and accelerating the foreign object detection response time. Furthermore, because the foreign object detection device and the Litz coil are not in the same cavity, the distance between them is increased, reducing the negative impact of heat generated by the Litz coil itself and lowering the complexity of the product's internal structure. In summary, this improves foreign object detection efficiency and reduces the difficulty of arranging the internal structure of wireless charging products. Attached Figure Description
[0007] Figure 1 For wireless charging products using this utility model; Figure 2 An exploded view of a wireless charging product using a specific embodiment of this utility model; The names corresponding to the serial numbers in the diagram are as follows: Wireless charging products 100; Foreign object detection device 10, circuit board 11, lead end 12, sensor 13, cover plate 20, upper plate 21, contoured lower groove 211, wiring through groove 212, encapsulation cover plate 30, control board 40, Litz coil 50. Detailed Implementation
[0008] An installation structure for a wireless charging foreign object detection device, see Figure 1 , Figure 2 It includes a foreign object detection device 10, a cover plate 20, and a sealing cover plate 30; The upper surface of the upper plate 21 of the cover plate 20 is provided with a contoured groove 211 corresponding to the surface area of the foreign object detection device; The foreign object detection device 10 is placed in the contoured lower groove 211. The encapsulation cover 30 is set in contour of the contoured lower groove 211. The encapsulation cover 30 covers the upper surface of the foreign object detection device 10, and the outer edge of the encapsulation cover 20 is set close to the upper edge contour of the contoured lower groove 211. The thickness of the encapsulation cover 30 is less than the thickness of the upper plate 21 of the cover 20 without the contoured lower groove. The upper plate 21 of the cover 20 is also provided with a corresponding wiring through groove 212. The corresponding lead end 12 of the foreign object detection device 10 passes through the wiring through groove and extends into the inner cavity of the wireless charging product 100, and is directly or indirectly connected to the corresponding port of the control board 40.
[0009] In specific implementation, the foreign object detection device 10 is formed by assembling a single circuit board and several sensors. At this time, the lead end of the single circuit board is a set of lead-out ribbon cables located on the side, and the wiring through slot is a single wiring through slot corresponding to the lead end.
[0010] For specific embodiments, see Figure 2 The foreign object detection device 10 consists of four circuit boards 11 assembled to form a rectangular detection area (see...). Figure 2 The lead ends 12 of the sensor 13 are located on the corresponding side of the two circuit boards 11 located on the same side. There are four wiring through slots 212, and each wiring through slot 212 is set at the corresponding position of the lead end 12 of each circuit board 11.
[0011] In the specific embodiment, the four circuit boards 11 of the foreign object detection device 10 are flexible circuit boards; the lead wires of the circuit board 11 are directly connected to the corresponding ports of the control board 40 after passing through the periphery of the Litz coil 50 below. The encapsulation cover 30 is attached to the periphery of the contoured lower groove 211 by adhesive to ensure a sealed connection.
[0012] Its working principle is as follows: A contoured groove is reserved on the upper plate of the top cover to place the foreign object detection device. Then, the foreign object detection device is sealed by the encapsulation cover. Since the thickness of the encapsulation cover is less than the thickness of the upper plate of the cover without the contoured groove, the foreign object detection device and the foreign object are closer, reducing the heat transfer distance and speeding up the foreign object detection response time. Furthermore, since the foreign object detection device and the Litz coil are not in the same cavity, the distance between the foreign object detection device and the Litz coil is lengthened, reducing the negative impact of the heat generated by the Litz coil itself, and reducing the complexity of the internal structure of the product. In summary, it improves the efficiency of foreign object detection and reduces the difficulty of internal structural layout of wireless charging products.
[0013] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0014] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A mounting structure for a wireless charging foreign object detection device, characterized in that: It includes: Foreign object detection device; The cover plate has a contoured groove on its upper surface corresponding to the surface area of the foreign object detection device. And the encapsulation cover; The foreign object detection device is placed in the contoured lower groove. The encapsulation cover is shaped to conform to the contour edge of the contoured lower groove. The encapsulation cover is installed on the upper surface of the foreign object detection device, and the outer edge of the encapsulation cover is closely attached to the upper edge contour edge of the contoured lower groove. The thickness of the encapsulation cover is less than the thickness of the upper plate of the cover without the contoured lower groove. The upper plate of the cover is also provided with a corresponding wiring through groove. The corresponding lead end of the foreign object detection device passes through the wiring through groove and extends into the inner cavity of the wireless charging product, and is directly or indirectly connected to the corresponding port of the control board.
2. The mounting structure for a wireless charging foreign object detection device according to claim 1, characterized in that: The foreign object detection device is assembled from a single circuit board and several sensors. In this case, the lead end of the single circuit board is a set of lead-out ribbon cables located on the side, and the wiring through slot is a single wiring through slot corresponding to the lead end.
3. The mounting structure for a wireless charging foreign object detection device according to claim 1, characterized in that: The foreign object detection device consists of four circuit boards spliced together to form a rectangular detection area. The lead ends of the sensors are positioned on the corresponding sides of the two circuit boards located on the same side. There are four through slots for wiring, and each through slot is positioned corresponding to the lead end of each circuit board.
4. The mounting structure for a wireless charging foreign object detection device according to claim 1, characterized in that: The circuit board of the foreign object detection device is a flexible circuit board or a rigid circuit board.
5. The mounting structure for a wireless charging foreign object detection device according to claim 4, characterized in that: The lead wires of the circuit board pass through the periphery of the Litz coil below and are connected to the corresponding port of the control board.