Charging coil assembly, electronic device and electronic assembly

Abstract

The utility model provides a charging coil assembly, electronic equipment and an electronic assembly, relates to the technical field of electronic products, and is used for solving the problem of how to improve the charging efficiency of charging equipment or power receiving equipment in different scenes. The charging coil assembly comprises a coil body, the coil body comprises a first-layer coil, the first-layer coil comprises a first coil section and a second coil section which are arranged in the circumferential direction of the first-layer coil, and the center of the first coil section and the center of the second coil section are arranged in a spaced mode. The charging coil assembly provided by the utility model is used for charging power receiving equipment.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to charging coil assemblies, electronic devices, and electronic assemblies. Background Art

[0002] A wireless charging system consists of a charging device with a transmitting coil assembly and a receiving coil assembly. Electromagnetic induction transfers power from the charging device to the receiving device. This transfer eliminates the need for a physical charging cable, making it convenient to use.

[0003] The alignment accuracy between the transmitting coil assembly and the receiving coil assembly affects the charging efficiency between the charging device and the powered device. The higher the alignment accuracy, the higher the charging efficiency. However, the same powered device often needs to be compatible with multiple charging devices, or the same charging device often needs to be compatible with multiple powered devices to meet charging needs in different scenarios. In some scenarios, the alignment accuracy between the transmitting coil assembly and the receiving coil assembly is high, while in other scenarios, the alignment accuracy between the transmitting coil assembly and the receiving coil assembly is low. Therefore, the charging device or powered device in the prior art cannot meet high charging efficiency in different charging scenarios. Utility Model Content

[0004] The embodiments of the present application provide a charging coil assembly, an electronic device, and an electronic assembly to solve the problem of how to improve the charging efficiency of a charging device or a powered device in different scenarios.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a charging coil assembly is provided, comprising: a coil body, the coil body comprising a first layer of coils, the first layer of coils comprising a first coil segment and a second coil segment arranged circumferentially along the first layer of coils, the center of the first coil segment being spaced apart from the center of the second coil segment.

[0007] In this way, the center of the first coil segment can be aligned with the center of the opposite coil assembly in one charging scenario, and the area surrounded by the first coil segment is as opposite as possible to the area surrounded by the opposite coil assembly, thereby improving the coupling efficiency between the first coil segment and the opposite coil assembly, thereby improving the transmission efficiency of wireless charging in this charging scenario. The center of the second coil segment can be aligned with the center of the opposite coil assembly in another charging scenario, and the area surrounded by the second coil segment is as opposite as possible to the area surrounded by the opposite coil assembly, thereby improving the coupling efficiency between the second coil segment and the center of the opposite coil assembly, thereby improving the transmission efficiency of wireless charging in another charging scenario. In other words, in a variety of different scenarios, the charging coil assembly can maintain a high coupling efficiency with the opposite coil assembly, can meet charging needs, and has a high charging efficiency, thereby improving the adaptability of electronic devices.

[0008] In a possible implementation of the first aspect, along the circumference of the first layer of coils, the first coil segment extends along a polygonal line or a circular arc line. Along the circumference of the first layer of coils, the second coil segment extends along a polygonal line or a circular arc line. In this way, the effective surface area of ​​the first coil segment and the second coil segment can be increased, thereby improving the coupling efficiency between the first coil segment and the opposite coil assembly, as well as the coupling efficiency between the second coil segment and the opposite coil assembly. In other words, it can be ensured that the area surrounded by the first coil segment and the area surrounded by the second coil segment are relatively large relative to the area surrounded by the opposite coil assembly, thereby ensuring the coupling efficiency between the charging coil assembly and the opposite coil assembly, thereby improving the charging efficiency.

[0009] In one possible implementation of the first aspect, the first layer coil includes a first coil portion and a second coil portion located outside the first coil portion, wherein the width of each coil turn in the first coil portion is smaller than the width of each coil turn in the second coil portion. The first coil portion includes a first section and a second section arranged along the coil body. The second coil portion includes a third section and a fourth section arranged along the coil body. The third section is located outside the first section, and the fourth section is located outside the second section. The first and third sections form a first coil section, and the second and fourth sections form a second coil section. Thus, by setting the width of each coil turn in the first coil portion to be smaller than the width of each coil turn in the second coil portion, a higher magnetic field strength can be generated in the first coil portion. Meanwhile, increasing the width of the second coil portion increases the coil area, expands the coverage of the magnetic field, and thereby improves overall energy transmission efficiency. Furthermore, reducing the coil width of the first coil portion can avoid the problem of increased eddy current losses caused by excessively large coil widths.

[0010] In one possible implementation of the first aspect, the coil body further includes a second layer of coils stacked on the first layer of coils. The second layer of coils includes a fifth coil segment and a sixth coil segment arranged circumferentially along the second layer of coils, with the center of the fifth coil segment spaced apart from the center of the sixth coil segment. The fifth coil segment is opposite the first coil segment, and the sixth coil segment is opposite the second coil segment. In this way, by providing a double-layer coil structure, the magnetic coupling between the transmitting coil and the receiving coil can be enhanced. The stacked coil structure can create a stronger magnetic field in a smaller space, thereby improving energy transmission efficiency.

[0011] In one possible implementation of the first aspect, the coil body further includes a second layer of coils stacked on the first layer of coils. The second layer of coils includes a fifth coil segment and a sixth coil segment arranged circumferentially along the second layer of coils, with the center of the fifth coil segment coinciding with the center of the sixth coil segment. The fifth coil segment is opposite the first coil segment. In other words, the second layer of coils and the first layer of coils have different shapes, and the fifth coil segment of the second layer of coils is opposite the first coil segment of the first layer of coils. Thus, by providing the second layer of coils, the magnetic field strength of the wireless charging coil in a charging scenario can be enhanced, the coupling efficiency between the charging coil assembly and the transmitting coil assembly can be improved, and the transmission efficiency of wireless charging in a charging scenario can be improved.

[0012] In one possible implementation of the first aspect, the second coil layer includes a third coil portion and a fourth coil portion located outside the third coil portion. The third coil portion is connected in parallel with the first coil portion to form a parallel section, and the second coil portion, the parallel section, and the fourth coil portion are sequentially connected in series. This disperses the current density in the parallel section across the two layers, improving the uniformity of the current distribution in the parallel section. Furthermore, the magnetic field generated by the current is made more uniform, thereby reducing energy loss during wireless power transmission from the charging device to the receiving device.

[0013] In one possible implementation of the first aspect, the charging coil assembly further includes an insulating layer disposed between the first and second coil layers. The insulating layer allows for more regular, conforming, and stable wiring, facilitating full utilization of the coil thickness and width.

[0014] In one possible implementation of the first aspect, the first coil layer further includes a third coil segment and a fourth coil segment arranged circumferentially along the first coil layer. The fourth coil segment is located on the side of the first and third coil segments away from the second coil segment. The centers of the third and fourth coil segments coincide with the center of the first coil segment. Along the circumference of the first coil layer, the third coil segment extends along a polygonal line or a circular arc. Along the circumference of the first coil layer, the fourth coil segment extends along a polygonal line or a circular arc. This ensures that the centers of the third and fourth coil segments coincide with the center of the first coil segment. The area enclosed by the third and fourth coil segments is as closely aligned as possible with the area enclosed by the opposite coil assembly in a charging scenario, thereby improving the coupling efficiency between the charging coil assembly and the opposite coil assembly, and thereby improving the transmission efficiency of wireless charging in that charging scenario. Furthermore, the polygonal or circular coil shape increases the effective surface area of ​​the coil, thereby improving the coupling between the charging coil assembly and the transmitting coil assembly. This enables more efficient energy transmission, thereby improving the charging efficiency of wireless charging.

[0015] In a possible implementation of the first aspect, the outer diameter of the first coil section is greater than or equal to 44 mm and less than or equal to 54 mm. The inner diameter of the first coil section is greater than or equal to 14 mm and less than or equal to 28 mm. The outer diameter of the coil of the opposite coil assembly in a charging scenario is generally 48 mm. Setting the outer diameter of the first coil section to an appropriate size can provide a larger effective coil area, thereby improving the electromagnetic coupling efficiency, ensuring higher energy transmission efficiency, and enhancing the magnetic field strength. Setting the values ​​of the inner and outer diameters of the first coil section within this specific range can improve the electromagnetic coupling efficiency, ensure higher energy transmission efficiency, reduce energy loss, and make the wireless charging system more efficient.

[0016] In a possible implementation of the first aspect, the outer diameter of the second coil section is greater than or equal to 38 mm and less than or equal to 46 mm. The inner diameter of the second coil section is greater than or equal to 10 mm and less than or equal to 20 mm. In another charging scenario, the outer diameter of the coil of the opposite coil assembly is generally 42 mm. Setting the outer diameter of the second coil section to an appropriate size can provide a larger effective coil area, thereby improving the electromagnetic coupling efficiency, ensuring higher energy transmission efficiency, and enhancing the magnetic field strength. Setting the values ​​of the inner and outer diameters of the second coil section within this specific range can improve the electromagnetic coupling efficiency, ensure higher energy transmission efficiency, reduce energy loss, and make the wireless charging system more efficient.

[0017] In one possible implementation of the first aspect, the distance between half the outer diameter of the first coil segment and half the inner diameter of the first coil segment is a first distance, and the distance between half the outer diameter of the second coil segment and half the inner diameter of the second coil segment is a second distance. The difference between the first and second distances is greater than or equal to -2 mm and less than or equal to 2 mm. This constrains the fluctuation range of the widths of the first and second coil segments, ensuring more consistent coil widths and improving the performance of the charging coil assembly.

[0018] In one possible implementation of the first aspect, the spacing between the center of the first coil segment and the center of the second coil segment is a third spacing, half the outer diameter of the second coil segment is a fourth spacing, and the sum of the third and fourth spacings is greater than half the outer diameter of the first coil segment and is less than or equal to 34 mm. In other words, the sum of the third and fourth spacings is the distance from the center of the first coil segment to the bottom of the second coil segment. This constrains the minimum and maximum dimensions of the charging coil assembly along the length of the powered device, improving its adaptability. It also prevents the charging coil assembly from being too large along the length of the powered device, which would reduce its coupling area and affect charging efficiency.

[0019] In one possible implementation of the first aspect, the difference in line width per turn between the first and second segments is less than or equal to 0.1 mm, and the difference in line width per turn between the third and fourth segments is less than or equal to 0.2 mm. The coils within the first and second segments are relatively compact, and the electromagnetic field distribution is relatively uniform. The smaller difference in line width per turn between the first and second segments helps maintain a stable electromagnetic field and enhance charging efficiency. The difference in line width per turn between the third and fourth segments can be slightly larger than the difference in line width per turn between the first and second segments. However, to maintain a stable electromagnetic field, the difference in line width per turn between the third and fourth segments cannot be too large. By limiting the difference in line width per turn within the first, second, third, and fourth segments, the width of each turn of the charging coil assembly can be made highly consistent, thereby ensuring the uniformity of the winding, helping to form a stable magnetic field, and ensuring efficient energy transfer during the charging process.

[0020] In a second aspect, the present application further provides an electronic device, comprising: a housing, and a charging coil assembly housed in the housing, wherein the charging coil assembly is the charging coil assembly as described in any of the above technical solutions.

[0021] Since the electronic device provided in the present application includes a charging coil assembly, and the charging coil assembly is a charging coil assembly as described in any of the above technical solutions, the two can solve the same problem and achieve the same effect.

[0022] In a possible implementation of the second aspect, the electronic device is in the shape of a rectangular plate, and the electronic device further includes a camera decorative part. The camera decorative part and the charging coil assembly are arranged along the length direction of the electronic device, and along the length direction of the electronic device, the second coil section is located on the side of the first coil section facing away from the camera decorative part. In other words, the center of the second coil section is located on the side of the center of the first coil section facing away from the camera decorative part. In this way, the center of the first coil section can be close to the center of the wireless charging coil in one charging scenario, thereby improving the transmission efficiency of wireless charging in this charging scenario. Due to the presence of the camera decorative part, in order to enable the wireless charging device of another charging scenario to be used in conjunction with the electronic device, the opposite coil assembly of the other charging scenario needs to be moved downward to avoid the camera decorative part. Since the center of the second coil section moves downward, it can be aligned with the center of the opposite coil assembly of the other charging scenario, thereby improving the transmission efficiency of wireless charging in this scenario.

[0023] In a third aspect, the present application also provides an electronic component, comprising a protective case and an electronic device as described in any of the above technical solutions, wherein the protective case is arranged outside the electronic device and has a magnetic structure.

[0024] Since the electronic component provided in the present application includes an electronic device, and the electronic device is an electronic device as described in any of the above technical solutions, the two can solve the same problem and achieve the same effect.

[0025] Among them, the technical effects brought about by any design method in the second aspect and the third aspect can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a wireless charging system provided in some embodiments of the present application;

[0027] Figure 2 for Figure 1 Schematic diagram of the relative positions of the wireless charging system during the charging process;

[0028] Figure 3 A schematic diagram of the structure of a charging device and a powered device for wireless charging in a charging scenario provided by some embodiments of the present application;

[0029] Figure 4 A schematic diagram of the structure of a charging device and a powered device for wireless charging in another charging scenario provided by some embodiments of the present application;

[0030] Figure 5 A schematic diagram of the structure of an electronic device provided in some embodiments of the present application;

[0031] Figure 6Schematic diagram of a coil body provided in some embodiments of the present application;

[0032] Figure 7 A schematic diagram of the structure of a charging device and a powered device for wireless charging in a charging scenario provided by some embodiments of the present application;

[0033] Figure 8 A schematic diagram of the structure of a charging device and a powered device for wireless charging in another charging scenario provided by some embodiments of the present application;

[0034] Figure 9 A schematic diagram of the structure of a charging coil assembly provided in some other embodiments of the present application;

[0035] Figure 10 A schematic structural diagram of the first layer coil of the charging coil assembly provided in some embodiments of the present application;

[0036] Figure 11 A schematic diagram of the structure of the first layer coil and the second layer coil of the charging coil assembly provided in some embodiments of the present application, wherein Figure 11 (a) is a schematic structural diagram of the first layer coil of the charging coil assembly provided in some embodiments of the present application. Figure 11 (b) is a schematic structural diagram of the second layer coil of the charging coil assembly provided in some embodiments of the present application;

[0037] Figure 12 This is a schematic diagram of the structure of the first layer coil and the second layer coil of the charging coil assembly provided in other embodiments of the present application, wherein Figure 12 (a) is a schematic structural diagram of the first layer coil of the charging coil assembly provided in another embodiment of the present application. Figure 12 (b) is a schematic structural diagram of the second layer coil of the charging coil assembly provided in other embodiments of the present application;

[0038] Figure 13 A schematic diagram of the structure of the first coil layer, the insulating layer, and the second coil layer of the charging coil assembly provided in some embodiments of the present application;

[0039] Figure 14 A schematic diagram of the structure of the first layer coils of the charging coil assembly provided in some embodiments of the present application with various sizes;

[0040] Figure 15 A schematic structural diagram of a charging device, a powered device, and a protective case for wireless charging in another charging scenario provided in some embodiments of the present application. DETAILED DESCRIPTION

[0041] In the embodiments of the present application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of the features.

[0042] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0043] In the embodiments of the present application, it should be noted that the description "parallel" means approximately parallel within a certain error range, which can be a range of a deviation angle of less than or equal to 5° relative to absolute parallelism. The description of "aligned" in direction means approximately aligned within a certain error range, which can be a range of a deviation angle of less than or equal to 5° relative to absolute alignment.

[0044] The wireless charging process requires a transmitter and a receiver. Figure 1 , Figure 1 This is a schematic diagram of the structure of a wireless charging system provided in some embodiments of the present application. The wireless charging system includes a charging device 100 and a powered device 200. The charging device 100 is also the transmitting end, and the powered device 200 is also the receiving end.

[0045] Specifically, the charging device 100 can be a bedside charging station, a car charging station, etc. The shape of the charging device 100 includes but is not limited to a square disk, a circular disk, or an oval disk. The powered device 200 includes but is not limited to a mobile phone, a toothbrush, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a personal computer, a notebook computer, a wearable device, a walkman, a radio, etc. Among them, wearable devices include but are not limited to smart watches, smart bracelets, smart clothes, smart glasses, and smart headphones. The following embodiments are illustrative of the powered device 200 as a smart phone, which cannot be considered as a special limitation on the structural form of the powered device 200.

[0046] It should be noted that the smartphone may be a full-screen phone, a foldable phone, a slider phone, or a flip phone, and this application does not impose any restrictions on this.

[0047] See also Figure 2 , Figure 2 for Figure 1 The figure shows the relative positions of the wireless charging system during the charging process. The transmitting charging device 100 has a built-in transmitting coil assembly 10 (shown by the dotted line), and the powered device 200 has a built-in receiving coil assembly 20 (shown by the dotted line). During the charging process, the powered device 200 is supported on the charging device 100. The plane where the transmitting coil assembly 10 is located is roughly parallel to the plane where the receiving coil assembly 20 is located. The area surrounded by the transmitting coil assembly 10 and the area surrounded by the receiving coil assembly 20 are at least partially opposite.

[0048] When an alternating current I1 flows through the transmitting coil assembly 10, an alternating magnetic field H is generated around the transmitting coil assembly 10. The magnetic flux lines of this magnetic field H at least partially pass through the area surrounded by the receiving coil assembly 20. Based on this, according to the principle of electromagnetic induction, an alternating current I2 is induced in the receiving coil assembly 20, thereby achieving wireless transmission of electrical energy. This charging method does not require a charging cable connection, making it convenient, safe and reliable.

[0049] It should be noted that during the charging process, the coupling coefficient between the transmitting coil assembly 10 and the receiving coil assembly 20 determines whether charging is successful and the charging efficiency. When the coupling coefficient is greater than a first preset threshold, the voltage sensed by the receiving coil assembly 20 is greater than a second preset threshold, so that the charging chip in the powered device 200 can be activated to perform the charging process. Within the range above the first preset threshold, the greater the coupling coefficient, the greater the voltage sensed by the receiving coil assembly 20, and the higher the charging efficiency. Among them, the coupling coefficient between the transmitting coil assembly 10 and the receiving coil assembly 20 is affected by factors such as the coil size ratio, coil spacing, and alignment. Generally, in order to obtain a higher coupling coefficient (approximately 0.75) and charging efficiency, it is necessary to ensure that the center of the transmitting coil assembly 10 and the center of the receiving coil assembly 20 are aligned in the stacking direction of the two.

[0050] However, the same powered device 200 often needs to be adapted to multiple charging devices 100, such as a smartphone needs to be adapted to a desktop charging stand and a car charging stand. The same charging device 100 often needs to be adapted to multiple powered devices 200, such as a desktop charging stand needs to be adapted to a smartphone and a tablet computer, to meet charging needs in different scenarios.

[0051] In some scenarios, the alignment accuracy between the transmitting coil assembly 10 and the receiving coil assembly 20 is high, while in other scenarios, the alignment accuracy between the transmitting coil assembly 10 and the receiving coil assembly 20 is low.

[0052] For example, when using a car charger to charge a smartphone, you can use the buckles on the edge of the car charger to fix the relative position of the smartphone and the car charger, and set the transmitting coil assembly in the middle of the length of the car charger, and set the receiving coil assembly in the middle of the length of the smartphone, so that the transmitting coil assembly and the receiving coil assembly can be aligned, so that charging is successful and charging efficiency is guaranteed. For details, refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a charging device and a powered device for wireless charging in a charging scenario provided by some embodiments of the present application. The dimensions of the vehicle charging base are 170mm long and 80mm wide. The center of the transmitting coil assembly 10 is located at the center of the vehicle charging base. Along the length of the vehicle charging base, the distance between the center of the transmitting coil assembly 10 and the two sides is 85mm. The dimensions of the smartphone are 160mm long and 75mm wide. To ensure high alignment accuracy between the transmitting coil assembly 10 and the receiving coil assembly 20, the distance L1 between the center of the transmitting coil assembly 10 and the center of the receiving coil assembly 20 should be small.

[0053] When charging the smartphone using a desktop charging dock, magnetic attachment is often used to secure the dock and smartphone relative to each other for greater convenience. This requires the dock to be in close contact with the smartphone's surface to ensure magnetic stability and reliability. However, due to protrusions such as the camera trim 500 on the back of the smartphone, the transmitter coil assembly 10 and the receiver coil assembly 20 often become misaligned to avoid the protrusions, preventing proper alignment of the transmitter coil assembly 10 and the receiver coil assembly 20.

[0054] Specifically, refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the charging device and the powered device for wireless charging in another charging scenario provided by some embodiments of the present application. The camera decoration 500 protrudes from the surface of the smartphone and easily interferes with the desktop charging stand. In other words, the top of the desktop charging stand can only closely contact the bottom of the camera decoration 500 on the side facing the receiving coil assembly 20. Because the desktop charging stand needs to avoid the camera decoration 500, even if the transmitting coil assembly 10 is placed close to the edge of the desktop charging stand, the center of the transmitting coil assembly 10 cannot be aligned with the center of the receiving coil assembly 20. In other words, the distance L2 between the center of the transmitting coil assembly 10 and the center of the receiving coil assembly 20 is large, and the coupling efficiency between the transmitting coil assembly 10 and the receiving coil assembly 20 is low, which in turn affects the charging efficiency or even causes no charging.

[0055] Based on the above description, the charging device 100 or the powered device 200 in the prior art cannot meet high charging efficiency in different charging scenarios.

[0056] To solve the above problem, please refer to Figure 5 , Figure 5 Schematic diagram of the structure of an electronic device provided in some embodiments of the present application. The electronic device 300 can be the charging device 100 described above, or the powered device 200 described above. This application uses the electronic device 300 as the powered device 200 for illustrative purposes, and this should not be considered a special limitation of the present application.

[0057] The electronic device 300 is roughly in the shape of a rectangular plate, which makes it easier for the user to grasp the electronic device 300. On this basis, in order to facilitate the description of the embodiments below, an XYZ coordinate system is established for the electronic device 300 described in this embodiment and the embodiments below. Specifically, the thickness direction of the electronic device 300 is defined as the Z-axis direction, and the plane perpendicular to the Z-axis direction is the XY plane; based on this, the length direction of the electronic device 300 is defined as the Y-axis direction, and the direction perpendicular to the Y-axis direction in the XY plane is the X-axis direction. It can be understood that the coordinate system setting of the electronic device 300 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the electronic device 300 can also be in the shape of a curved plate, which is not specifically limited here.

[0058] See also Figure 5 , the electronic device 300 may include a housing 400 , a camera decoration 500 and a charging coil assembly 30 .

[0059] The housing 400 protects internal components such as the charging coil assembly 30. Materials for the housing 400 include, but are not limited to, polycarbonate (PC), PC + fiberglass, ABS (acrylonitrile butadienestyrene plastic), and other plastics. The housing 400 may be a single, integral component or assembled from multiple components, which is not specifically limited in this application.

[0060] The camera decorative piece 500 is set on the back cover of the housing 400 and protrudes from the outer surface of the back cover of the housing 400. This arrangement allows the camera to have a larger Z-axis dimension, while also contributing to the thinness of the entire device and improving the feel of the entire device. The housing 400 has a storage space, and the outer surface of the back cover refers to the surface of the housing 400 that is away from the storage space of the housing 400. The actual shape, size, position and structure of the camera decorative piece 500 are not affected by the actual shape, size, position and structure of the camera decorative piece 500. Figure 5 restrictions.

[0061] The charging coil assembly 30 is disposed in the housing 400 . When the electronic device 300 is a charging device 100 , the charging coil assembly 30 is the transmitting coil assembly 10 . When the electronic device 300 is a powered device, the charging coil assembly 30 is the receiving coil assembly 20 .

[0062] The charging coil assembly 30 is used to generate electromagnetic induction with the opposite coil assembly to achieve power transmission. It should be noted that when the charging coil assembly 30 is the transmitting coil assembly 10, the opposite coil assembly is the receiving coil assembly 20. When the charging coil assembly 30 is the receiving coil assembly 20, the opposite coil assembly is the transmitting coil assembly 10.

[0063] The charging coil assembly 30 and the camera trim 500 are arranged along the length of the electronic device 300, that is, along the Y direction. The projections of the charging coil assembly 30 and the camera trim 500 on the XY plane of the housing 400 are spaced apart and do not overlap. This ensures that the charging coil assembly 30 transmits power at a specific location, and the camera trim 500 does not cause signal interference, thereby affecting charging efficiency and functionality. In addition, the charging coil assembly 30 generates heat during charging. If the camera trim 500 covers the charging coil assembly 30, heat may accumulate in this area, causing the overall temperature of the electronic device 300 to increase. Designing the charging coil assembly 30 and the camera trim 500 to be spaced apart facilitates heat dissipation from the charging coil assembly 30, reducing the probability of overheating of the electronic device 300 due to poor heat dissipation.

[0064] It is understandable that Figure 5 The schematic diagram shows some components of the electronic device. The actual shape, size, position and structure of these components are not affected by the actual shape, size, position and structure of the electronic device. Figure 3 In some embodiments, when the electronic device 300 is the powered device 200, the electronic device 300 may include a battery in addition to the housing 400, the camera trim 500, and the charging coil assembly 30. The battery may be a secondary battery, specifically including but not limited to a lead-acid battery, a nickel-cadmium battery, a nickel-metal hydride battery, a lithium-ion battery, or a lithium polymer battery, and is used to store the power from the charging coil assembly 30.

[0065] The following will focus on the specific structure of the charging coil assembly 30.

[0066] The charging coil assembly 30 may include a coil body 31 , and the coil body 31 is configured to induce an alternating current in an alternating magnetic field environment.

[0067] Specifically, refer to Figure 6 , Figure 6 This is a schematic diagram of a coil body provided in some embodiments of the present application. Coil body 31 includes a first layer of coils 32. First layer of coils 32 includes a first coil segment 321 and a second coil segment 322 arranged circumferentially along first layer of coils 32. The center of first coil segment 321 is spaced apart from the center of second coil segment 322. In other words, coil body 31 has two centers.

[0068] refer to Figure 7 , Figure 7A structural schematic diagram of a charging device and a powered device for wireless charging in a charging scenario provided in some embodiments of the present application, wherein the center of the first coil segment 321 can be aligned with the center of an opposite coil assembly in a charging scenario, and the distance between the center of the first coil segment 321 and the center of the opposite coil assembly is L3. The area surrounded by the first coil segment 321 and the area surrounded by the opposite coil assembly are as opposite as possible, thereby improving the coupling efficiency between the first coil segment 321 and the opposite coil assembly, thereby improving the transmission efficiency of wireless charging in the charging scenario.

[0069] refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of a charging device and a powered device for wireless charging in another charging scenario provided by some embodiments of the present application. The center of the second coil segment 322 can be aligned with the center of the opposite coil assembly in another charging scenario. The distance between the center of the second coil segment 322 and the center of the opposite coil assembly is L4. The area surrounded by the second coil segment 322 and the area surrounded by the opposite coil assembly are as opposite as possible. Figure 8 and Figure 4 By comparison, we can see that L4 is smaller than L2. This allows the charging coil assembly 30 to maintain a high coupling efficiency with the opposite coil assembly in another charging scenario, thereby improving the wireless charging efficiency in that scenario. In various scenarios, the charging coil assembly 30 can maintain a high coupling efficiency with the opposite coil assembly, meeting charging requirements with high charging efficiency, thereby improving the adaptability of the electronic device 300.

[0070] In some embodiments, the charging coil assembly 30 may also include a magnetic core, a capacitor, and a rectifier. The magnetic core is usually located at the center or below the coil, in direct contact with or closely adjacent to the coil body 31. Ferrite material is generally used to help enhance the strength of the magnetic field and improve energy transmission efficiency. The capacitor is usually connected to the coil body 31 in parallel or series, and is usually placed close to the coil body 31 to optimize the resonant characteristics of the circuit. The rectifier is usually placed near the charging coil assembly 30 and connected to the wireless charging receiving end to convert the received alternating current (AC) into direct current (DC) for use by the electronic device 300. However, the rectifier is usually located slightly away from the coil body 31 to facilitate connection to a power supply or subsequent circuit.

[0071] In some embodiments, see Figure 5 Along the length direction of the electronic device 300 , that is, the Y direction, the second coil section 322 is located on the side of the first coil section 321 facing away from the camera decoration 500 .

[0072] That is, the center of the second coil section 322 is located on the side of the center of the first coil section 321 facing away from the camera decorative piece 500. In this way, the center of the first coil section 321 can be aligned with the center of the opposite coil assembly in one charging scenario, thereby improving the transmission efficiency of wireless charging in that scenario. Due to the presence of the camera decorative piece 500, in order to enable the charging device 100 to be used with the electronic device 300 in another charging scenario, the opposite coil assembly needs to be moved downward to avoid the camera decorative piece 500. However, since the center of the second coil section 322 is moved downward, it can be aligned with the center of the opposite coil assembly in another charging scenario, thereby improving the transmission efficiency of wireless charging in that scenario.

[0073] In this way, the charging coil assembly 30 can meet the charging needs in a variety of scenarios, and has a high charging efficiency, thereby improving the adaptability of the charging coil assembly 30 in different charging scenarios.

[0074] In some embodiments, see Figure 6 Along the circumference of the first coil layer 32, the first coil segment 321 extends along a circular arc. Therefore, the center of the first coil segment 321 is the center of the circular arc. Given the same area, a circular arc shape makes better use of space than a straight or square structure, increasing the effective surface area of ​​the first coil segment 321 and thus improving the coupling efficiency between the first coil segment 321 and the opposite coil assembly.

[0075] In some other embodiments, along the circumference of the first layer of coil 32, the first coil segment 321 extends along a polygonal line. A polygonal line is a line formed by a continuous number of sides of a polygon, and the center of the first coil segment 321 is the center of the polygon. This ensures that a larger portion of the area surrounded by the first coil segment 321 overlaps with the area surrounded by the opposite coil assembly, thereby ensuring efficient coupling between the first coil segment 321 and the opposite coil assembly, and thus improving charging efficiency.

[0076] Similarly, along the circumference of the first coil layer 32, the second coil segment 322 extends along an arc. Therefore, the center of the second coil segment 322 is the center of the arc. Given the same area, an arc shape can more effectively utilize space than a straight or square structure, increasing the effective surface area of ​​the second coil segment 322 and thus improving the coupling efficiency between the second coil segment 322 and the opposite coil assembly.

[0077] In some other embodiments, reference Figure 9 , Figure 9This is a schematic diagram of the structure of a charging coil assembly provided in some other embodiments of the present application. Along the circumference of the first layer coil 32, the second coil segment 322 extends along a polygon. A polygon is a line formed by a continuous plurality of edges in a polygon, and the center of the second coil segment 322 is the center of the polygon. Optionally, the polygon has at least three sides. This ensures that a larger portion of the area surrounded by the second coil segment 322 corresponds to the area surrounded by the transmitting coil assembly 10, ensuring efficient coupling between the second coil segment 322 and the transmitting coil assembly 10. This allows for more efficient energy transmission, thereby improving wireless charging efficiency.

[0078] Furthermore, polygonal or arc-shaped designs offer greater flexibility, allowing the coil shape to be optimized to meet specific application requirements, such as adapting to different charging devices or housing designs. Furthermore, properly designed coil geometry can reduce unwanted electromagnetic interference, thereby improving the overall system's anti-interference capabilities and enhancing system stability.

[0079] In some embodiments, reference Figure 10 , Figure 10 This is a schematic diagram of the structure of the first coil layer of a charging coil assembly provided in some embodiments of the present application. The first coil layer 32 includes a first coil portion 323 and a second coil portion 324 located outside the first coil portion 323. The width of each coil turn in the first coil portion 323 is smaller than the width of each coil turn in the second coil portion 324. By setting the width of each coil turn in the first coil portion 323 to be smaller than the width of each coil turn in the second coil portion 324, a higher magnetic field strength can be generated concentratedly at the first coil portion 323. Meanwhile, increasing the width of the second coil portion 324 increases the coil area and expands the coverage of the magnetic field, thereby improving overall energy transmission efficiency. Furthermore, the smaller coil width of the first coil portion 323 avoids the problem of increased eddy current losses that would occur if the coil width were too large.

[0080] Continue to see Figure 10The first coil section 323 includes a first section 3231 and a second section 3232 arranged along the coil body 31. The second coil section 324 includes a third section 3241 and a fourth section 3242 arranged along the coil body 31. The third section 3241 is located outside the first section 3231, and the fourth section 3242 is located outside the second section 3232. The first and third sections 3231 and 3241 form the first coil section 321, while the second and fourth sections 3232 and 3242 form the second coil section 322. In this way, the first and second coil sections 321 and 322 are formed by combining coils of different widths, effectively increasing the coupling area between the charging coil assembly 30 and the opposite coil assembly, thereby improving energy transfer efficiency. Furthermore, the combination of different sections optimizes the operating frequency and current distribution of the entire charging coil assembly 30, enhancing overall power transmission capabilities and providing faster charging speeds.

[0081] In some embodiments, see Figure 10 The first coil layer 32 further includes a third coil segment 325 and a fourth coil segment 326 arranged circumferentially along the first coil layer 32. The fourth coil segment 326 is located on the side of the first coil segment 321 and the third coil segment 325 away from the second coil segment 322. Thus, the first coil segment 321, the second coil segment 322, the third coil segment 325, and the fourth coil segment 326 are sequentially connected to form the first coil layer 32.

[0082] In some embodiments, see Figure 10 The centers of the third coil segment 325 and the fourth coil segment 326 coincide with the center of the first coil segment 321. This allows the centers of the third coil segment 325 and the fourth coil segment 326 to coincide with the center of the first coil segment 321. The areas surrounded by the third coil segment 325 and the fourth coil segment 326 are as closely aligned as possible with the area surrounded by the opposite coil assembly in a charging scenario, improving coupling efficiency between the coils and, consequently, wireless charging transmission efficiency in that charging scenario.

[0083] In some embodiments, see Figure 10 Along the circumference of the first coil layer 32, the third coil segment 325 extends along an arc. Therefore, the center of the third coil segment 325 is the center of the arc. Given the same area, an arc shape can more effectively utilize space than a straight or square structure, increasing the effective surface area of ​​the third coil segment 325 and thus improving the coupling efficiency between the third coil segment 325 and the transmitting coil assembly 10.

[0084] In some other embodiments, the third coil segment 325 extends along a polygonal line along the circumference of the first coil layer 32. A polygonal line is a line formed by a continuous number of sides of a polygon, and the center of the third coil segment 325 is the center of the polygon. This ensures that a larger portion of the area surrounded by the third coil segment 325 corresponds to the area surrounded by the opposite coil assembly in a charging scenario, thereby ensuring efficient coupling between the third coil segment 325 and the transmitting coil assembly 10 and improving charging efficiency.

[0085] In some embodiments, the fourth coil segment 326 extends along an arc along the circumference of the first coil layer 32. Therefore, the center of the fourth coil segment 326 is the center of the arc. Given the same area, an arc shape can more effectively utilize space than a straight or square structure, increasing the effective surface area of ​​the fourth coil segment 326 and thus improving the coupling efficiency between the fourth coil segment 326 and the opposite coil assembly in a charging scenario.

[0086] In some other embodiments, the fourth coil segment 326 extends along a polygonal line along the circumference of the first coil layer 32. A polygonal line is a line formed by a continuous number of edges within a polygon, and the center of the fourth coil segment 326 is the center of the polygon. This ensures that a larger portion of the area encompassed by the fourth coil segment 326 overlaps with the area encompassed by the opposite coil assembly, ensuring efficient coupling between the fourth coil segment 326 and the opposite coil assembly in a charging scenario. This allows for more efficient energy transfer, thereby improving wireless charging efficiency.

[0087] In some other embodiments, see Figure 10 The fourth coil segment 326 extends in a straight line, allowing the upper end of the fourth coil segment 326 to be positioned close to the camera trim 500 , thereby reducing the distance between the center of the fourth coil segment 326 and the center of the electronic device 300 . This reduces the distance between the centers of the first coil segment 321 , the third coil segment 325 , and the fourth coil segment 326 and the center of the electronic device 300 . This improves the coupling efficiency between the first coil segment 321 , the third coil segment 325 , and the fourth coil segment 326 and the opposite coil assembly in a charging scenario, thereby enhancing wireless charging efficiency.

[0088] In some embodiments, reference Figure 11 , Figure 11 A schematic diagram of the structure of the first layer coil and the second layer coil of the charging coil assembly provided in some embodiments of the present application, wherein Figure 11 (a) is a schematic structural diagram of the first layer coil of the charging coil assembly provided in some embodiments of the present application. Figure 11(b) is a schematic structural diagram of the second layer coil of the charging coil assembly provided in some embodiments of the present application. The coil body 31 also includes a first layer coil 32, such as Figure 11 As shown in (a), and the second layer coil 33, as shown Figure 11 As shown in (b), the second layer coil 33 is stacked on the first layer coil 32. Figure 11 The first layer of coils 32 and the second layer of coils 33 are two opposing surfaces. The second layer of coils 33 includes a fifth coil segment 331 and a sixth coil segment 332 arranged circumferentially along the second layer of coils 33. The center of the fifth coil segment 331 is spaced apart from the center of the sixth coil segment 332. The fifth coil segment 331 is opposite the first coil segment 321, and the sixth coil segment 332 is opposite the second coil segment 322. "The fifth coil segment 331 is opposite the first coil segment 321" means that the projection of the fifth coil segment 331 on the XY plane overlaps with the projection of the first coil segment 321 on the XY plane, and "the sixth coil segment 332 is opposite the second coil segment 322" means that the projection of the sixth coil segment 332 on the XY plane overlaps with the projection of the second coil segment 322 on the XY plane.

[0089] In some embodiments, the fifth coil segment 331 and the first coil segment 321 can have the same width, and the projection of the fifth coil segment 331 on the XY plane completely overlaps with the projection of the first coil segment 321 on the XY plane. The sixth coil segment 332 and the second coil segment 322 can have the same width, and the projection of the sixth coil segment 332 on the XY plane completely overlaps with the projection of the second coil segment 322 on the XY plane. In this way, by providing a double-layer coil, the magnetic coupling between the contralateral coil assembly and the charging coil assembly 30 in a charging scenario can be enhanced. The superimposed coil structure can create a stronger magnetic field in a smaller space, thereby improving energy transmission efficiency.

[0090] In some other embodiments, the width of the fifth coil segment 331 may be smaller than the width of the first coil segment 321, and the projection of the fifth coil segment 331 on the XY plane falls within the projection of the first coil segment 321 on the XY plane. The width of the sixth coil segment 332 may be smaller than the second coil segment 322, and the projection of the sixth coil segment 332 on the XY plane falls within the projection of the second coil segment 322 on the XY plane.

[0091] In some other embodiments, the width of the fifth coil segment 331 can be smaller than the width of the first coil segment 321, and the projection of the fifth coil segment 331 on the XY plane partially overlaps with the projection of the first coil segment 321 on the XY plane. That is, the projection of the fifth coil segment 331 on the XY plane is partially located outside the projection of the first coil segment 321 on the XY plane. The width of the sixth coil segment 332 can be smaller than the width of the second coil segment 322, and the projection of the sixth coil segment 332 on the XY plane partially overlaps with the projection of the second coil segment 322 on the XY plane. That is, the projection of the sixth coil segment 332 on the XY plane is partially located outside the projection of the second coil segment 322 on the XY plane.

[0092] In some other embodiments, reference Figure 12 , Figure 12 This is a schematic diagram of the structure of the first layer coil and the second layer coil of the charging coil assembly provided in other embodiments of the present application, wherein Figure 12 (a) is a schematic structural diagram of the first layer coil of the charging coil assembly provided in another embodiment of the present application. Figure 12 (b) is a schematic structural diagram of the second layer coil of the charging coil assembly provided in another embodiment of the present application, wherein the coil body 31 includes a first layer coil 32, as shown in FIG. Figure 12 As shown in (a), and the second layer coil 33, as shown Figure 12 As shown in (b), the second layer coil 33 is stacked on the first layer coil 32. Figure 12 The first layer of coils 32 and the second layer of coils 33 are two opposing surfaces. The second layer of coils 33 includes a fifth coil segment 331 and a sixth coil segment 332 arranged circumferentially along the second layer of coils 33. The center of the fifth coil segment 331 coincides with the center of the sixth coil segment 332. The fifth coil segment 331 is opposite the first coil segment 321. This also means that the sixth coil segment 332 is also opposite the first coil segment 321.

[0093] The fifth coil segment 331 being opposite to the first coil segment 321 means that the projection of the fifth coil segment 331 on the XY plane overlaps with the projection of the first coil segment 321 on the XY plane. The second layer coil 33 and the first layer coil 32 have different shapes. The fifth coil segment 331 of the second layer coil 33 is opposite to the first coil segment 321 of the first layer coil 32. That is, the fifth coil segment 331 and the first coil segment 321 can have the same width, and the projection of the fifth coil segment 331 on the XY plane completely overlaps with the projection of the first coil segment 321 on the XY plane. Thus, by providing the second layer coil 33, the magnetic field strength of the charging coil in a charging scenario can be enhanced, improving the coupling efficiency between the charging coil assembly 30 and the opposite coil assembly, thereby improving the transmission efficiency of wireless charging in this charging scenario.

[0094] In some other embodiments, the width of the fifth coil segment 331 may be smaller than the width of the first coil segment 321 , and the projection of the fifth coil segment 331 on the XY plane falls within the projection of the first coil segment 321 on the XY plane.

[0095] In some other embodiments, the width of the fifth coil segment 331 may be smaller than the width of the first coil segment 321, and the projection of the fifth coil segment 331 on the XY plane partially overlaps with the projection of the first coil segment 321 on the XY plane, that is, part of the projection of the fifth coil segment 331 on the XY plane is located outside the projection of the first coil segment 321 on the XY plane.

[0096] In some embodiments, see Figure 11 The second layer of coil 33 includes a third coil section 333 and a fourth coil section 334 located outside the third coil section 333. The third coil section 333 is connected in parallel with the first coil section 323 to form a parallel section 335. The second coil section 324, the parallel section 335, and the fourth coil section 334 are connected in series in this order. This arrangement allows the first coil section 323 and the third coil section 333 to be distributed across two layers, evenly distributing the current density within the parallel section 335 across the two layers, improving current distribution uniformity.

[0097] At the same time, when a high-frequency current flows through a wire, due to the skin effect, the farther away from the surface of the wire (i.e., inside the wire), the smaller the current. In other words, if a cross section is made in a direction perpendicular to the direction of the current, the current intensity in the center of the circle is basically equal to zero, and the farther away from the center of the circle, the stronger the current. The main reason for this skin effect is that the changing electromagnetic field generates an eddy electric field inside the wire, which offsets the original current. Therefore, within a certain space, the more wires are used, the greater the current, and the heating of the wire or the attenuation of electrical energy will be reduced. Therefore, the third coil section 325 is connected in parallel with the first coil section 321 to form a parallel section 335, which can reduce the skin effect and make the magnetic field generated by the current more uniform. In layman's terms, it provides a larger area of ​​passage for the current, thereby reducing the power loss when the charging device 100 transmits wireless power to the electronic device 300.

[0098] Each coil in the second coil section 324, parallel section 335, and fourth coil section 334 is independently routed. The number of coils is the same and they are connected sequentially. This avoids the eddy current losses that would otherwise occur if two coils were combined and then connected to an adjacent coil when different coil groups have different numbers of coils. The second coil section 324, parallel section 335, and fourth coil section 334 are arranged in series, eliminating the need for conductive structures between the upper and lower layers, simplifying the winding process of the charging coil assembly 30.

[0099] Continue to see Figure 11 The charging coil assembly 30 includes a first end 34 and a second end 35. Current is input through the first end 34 and output through the second end 35. The charging coil assembly 30 comprises a plurality of wire strands, which are wound continuously from the first end 34 to the second end 35 and arranged in two layers. The winding process begins at the first end 34 and winds inward in a spiral. In some embodiments, the number of wire strands is four.

[0100] For example, the charging coil assembly 30 of the present application is wound using a wire group formed by four parallel wires. The charging coil assembly 30 can be formed into a planar structure using a spiral winding method to form a first layer of coils 32, that is, the wire group is wound in a direction of decreasing winding radius. The first layer of coils 32 has a first end 34. Similarly, the charging coil assembly 30 can be formed into a planar structure using a spiral winding method to form a second layer of coils 33, that is, the wire group is wound in a direction of decreasing winding radius. The second layer of coils 33 has a second end 35.

[0101] To reduce eddy current losses, the conductor width of the first coil portion 323 of the first coil layer 32 is smaller than the conductor width of the second coil portion 324. The conductor width of the third coil portion 333 of the second coil layer 33 is smaller than the conductor width of the fourth coil portion 334. The first coil portion 323 is the inner turn of the first coil layer 32, and the second coil portion 324 is the outer turn of the first coil layer 32. The third coil portion 333 is the inner turn of the second coil layer 33, and the fourth coil portion 334 is the outer turn of the second coil layer 33.

[0102] To improve the uniformity of the current density in the inner coil, the first coil section 323 and the third coil section 333 are provided with multiple sets of vias 37, and the first coil section 323 and the third coil section 333 are arranged in parallel. Furthermore, the four conductors of the first coil section 323 and the third coil section 333 are arranged in a cross-connected arrangement at the vias 37. This allows the magnetic fields formed by current passing through adjacent conductors to have opposite directions at that location, causing the magnetic flux in the gap of that conductor to cancel out the magnetic flux in the gap of the adjacent conductor, thereby reducing the generation of circulating current in the coil gap of the adjacent conductors and effectively reducing the additional heating of the coil windings, which helps to improve the power transmission efficiency of the charging coil assembly 30.

[0103] The current is input through the first end 34 , enters the second coil portion 324 , passes through the parallel section 335 formed by the first coil portion 323 and the third coil portion 333 in parallel, enters the fourth coil portion 334 , and is output through the second end 35 .

[0104] In some other embodiments, current may also be input from the second terminal 35 and output from the first terminal 34 .

[0105] In some other embodiments, the charging coil assembly 30 may be an FPC coil, which is formed by etching a conductive layer, for example, the conductive layer may be a copper layer, an aluminum layer, a nickel layer, a gold layer, a silver layer, or an alloy layer.

[0106] In some embodiments, reference Figure 13 , Figure 13 This diagram illustrates the structure of the first coil layer, insulation layer, and second coil layer of a charging coil assembly provided in some embodiments of the present application. Charging coil assembly 30 also includes insulation layer 36, which is disposed between first coil layer 32 and second coil layer 33. The use of insulation layer 36 provides a more regular, conformable, and stable coil arrangement, facilitating full utilization of the coil thickness and width. The material of insulation layer 36 includes, but is not limited to, at least one of PI, PC, PC + fiberglass, and ABS plastic, though this application does not impose any restrictions thereon.

[0107] In some embodiments, reference Figure 14 , Figure 14 This diagram illustrates the dimensions of the first coil layer of a charging coil assembly provided in some embodiments of the present application. The outer diameter R1 of the first coil segment 321 is greater than or equal to 44 mm and less than or equal to 54 mm. For example, the outer diameter R1 of the first coil segment 321 can be 44 mm, 45 mm, 46 mm, 47 mm, 48 mm, 49 mm, 50 mm, 51 mm, 52 mm, 53 mm, or 54 mm.

[0108] The outer diameter R1 of the contralateral coil assembly in a charging scenario is generally 48 mm. Setting the outer diameter R1 of the first coil section 321 to an appropriate size can provide a larger effective coil area, thereby improving the electromagnetic coupling efficiency, ensuring higher energy transmission efficiency, and enhancing the magnetic field strength. Among them, the outer diameter R1 of the first coil section 321 refers to the diameter of the point on the outer ring of the first coil section 321 that is closest to the center of the first coil section 321. For example, the first coil section 321 is an arc shape, and the outer diameter R1 of the first coil section 321 refers to the diameter of the arc shape. For another example, the first coil section 321 is a triangle, and the outer diameter R1 of the first coil section 321 refers to the diameter of the point on the outer ring of the first coil section 321 that is closest to the center of the first coil section 321.

[0109] In addition, the inner diameter R2 of the first coil segment 321 is greater than or equal to 14 mm and less than or equal to 28 mm. For example, the inner diameter R2 of the first coil segment 321 can be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, etc. A reasonable inner diameter R2 size helps reduce electromagnetic interference, thereby improving the stability and safety of charging. Among them, the inner diameter R2 of the first coil segment 321 refers to the diameter of the point on the inner ring of the first coil segment 321 that is closest to the center of the first coil segment 321. For example, if the first coil segment 321 is arc-shaped, the inner diameter R2 of the first coil segment 321 refers to the diameter of the arc. For another example, the first coil segment 321 is a triangle, and the inner diameter R2 of the first coil segment 321 refers to the diameter of the point on the inner circle of the first coil segment 321 that is closest to the center of the first coil segment 321 .

[0110] Setting the outer diameter R1 and inner diameter R2 of the first coil segment 321 within this specific range can improve electromagnetic coupling efficiency, ensure higher energy transmission efficiency, reduce energy loss, and make the wireless charging system more efficient. In other words, this size range makes the coil compatible with most wireless charging devices 100 used in a single charging scenario on the market.

[0111] In some embodiments, see Figure 14 , the outer diameter R3 of the second coil segment 322 is greater than or equal to 38 mm and less than or equal to 46 mm. For example, the outer diameter R3 of the second coil segment 322 can be 38 mm, 39 mm, 40 mm, 41 mm, 42 mm, 43 mm, 44 mm, 45 mm, 46 mm, etc. In another charging scenario, the outer diameter R3 of the coil for wireless charging is generally 42 mm. Setting the outer diameter R3 of the second coil segment 322 to an appropriate size can provide a larger effective coil area, thereby improving electromagnetic coupling efficiency, ensuring higher energy transmission efficiency, and enhancing magnetic field strength. The outer diameter R3 of the second coil segment 322 refers to the diameter of the point on the outer ring of the second coil segment 322 that is closest to the center of the second coil segment 322. For example, if the second coil segment 322 is arc-shaped, the outer diameter R3 of the second coil segment 322 refers to the diameter of the arc. For another example, the second coil segment 322 is a triangle, and the outer diameter R3 of the second coil segment 322 refers to the diameter of the point on the outer circle of the second coil segment 322 that is closest to the center of the second coil segment 322 .

[0112] In addition, the inner diameter R4 of the second coil segment 322 is greater than or equal to 10 mm and less than or equal to 20 mm. For example, the inner diameter R4 of the second coil segment 322 may be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc. The inner diameter R4 of the second coil segment 322 refers to the diameter of the point on the inner circle of the second coil segment 322 that is closest to the center of the second coil segment 322. For example, if the second coil segment 322 is an arc, the inner diameter R4 of the second coil segment 322 refers to the diameter of the arc. For another example, if the second coil segment 322 is a triangle, the inner diameter R4 of the second coil segment 322 refers to the diameter of the point on the inner circle of the second coil segment 322 that is closest to the center of the second coil segment 322.

[0113] It is understood that the outer diameter R3 and inner diameter R4 of the second coil segment 322 within this specific range can improve electromagnetic coupling efficiency, ensure higher energy transmission efficiency, reduce energy loss, and enhance the efficiency of wireless charging in another charging scenario. In other words, this size range makes the coil compatible with most charging devices 100 on the market for this charging scenario.

[0114] By specifying the value ranges of the outer diameter R1 and the inner diameter R2 of the first coil section 321 and the value ranges of the outer diameter R3 and the inner diameter R4 of the second coil section 322, the charging coil assembly 30 can be adapted to the opposite coil assembly in most charging scenarios on the market. That is to say, the electronic device 300 equipped with the charging coil assembly 30 can be compatible with the charging device 100 in most scenarios on the market, and can ensure a better charging effect, thereby improving the adaptability of the electronic device 300.

[0115] In some embodiments, see Figure 14 The difference between half the outer diameter R1 of the first coil section 321 and half the inner diameter R2 of the first coil section 321 is the first spacing H1. The difference between half the outer diameter R3 of the second coil section 322 and half the inner diameter R4 of the second coil section 322 is the second spacing H2. The difference between the first spacing H1 and the second spacing H2 is greater than or equal to -2 mm and less than or equal to 2 mm. This limits the fluctuation range of the width of the first coil section 321 and the width of the second coil section 322, ensuring a more consistent coil width and improving the performance of the charging coil assembly 30.

[0116] For example, the difference between the first spacing H1 and the second spacing H2 may be -2 mm, -1 mm, 0 mm, 1 mm, 2 mm, etc. This application does not impose any limitation on this, and the difference may be set according to actual needs.

[0117] In some embodiments, see Figure 14 The distance between the center of the first coil segment 321 and the center of the second coil segment 322 is a third distance H3, half of the outer diameter R3 of the second coil segment 322 is a fourth distance H4, and the sum of the third distance H3 and the fourth distance H4 is greater than half of the outer diameter R1 of the first coil segment 321. For example, the sum of the third distance H3 and the fourth distance H4 can be 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, etc. This application does not impose any restrictions on this, and specific settings can be made based on actual needs.

[0118] The sum of the third spacing H3 and the fourth spacing H4 is the distance from the center of the first coil segment 321 to the bottom of the second coil segment 322. This constrains the minimum dimension of the charging coil assembly 30 along the length of the electronic device 300, ensuring that the centers of the first coil segment 321 and the second coil segment 322 do not overlap and maintain a certain spacing, thereby improving the adaptability of the charging coil assembly 30. In other embodiments, the sum of the third spacing H3 and the fourth spacing H4 is less than or equal to 34 mm. This constrains the maximum dimension of the charging coil assembly 30 along the length of the electronic device 300, preventing the charging coil assembly 30 from being too large along the length of the electronic device 300, thereby reducing the coupling area of ​​the charging coil assembly 30 and affecting charging efficiency.

[0119] In some embodiments, the difference in line width per turn between the first section 3231 and the second section 3232 is less than or equal to 0.1 mm. For example, the difference in line width per turn between the first section 3231 and the second section 3232 can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc. The coils within the first section 3231 and the second section 3232 are relatively compact, resulting in a more uniform distribution of the electromagnetic field. The smaller difference in line width per turn between the first section 3231 and the second section 3232 helps maintain a stable electromagnetic field and enhance charging efficiency.

[0120] The difference in line width per turn between the third section 3241 and the fourth section 3242 is less than or equal to 0.2 mm. For example, the difference in line width per turn between the third section 3241 and the fourth section 3242 can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, etc. This application does not impose any limitation on this, and the difference can be set according to actual needs.

[0121] The outer coil of the charging coil assembly 30 is subject to a heavy load. To prevent overheating and improve power-carrying capacity, the third and fourth sections 3241 and 3242 require wider coils. Specifically, the per-turn width within the third and fourth sections 3241 and 3242 is greater than the per-turn width within the first and second sections 3231 and 3232. The per-turn width difference between the third and fourth sections 3241 and 3242 can be slightly greater than the per-turn width difference between the first and second sections 3231 and 3232. However, to maintain a stable electromagnetic field, the per-turn width difference between the third and fourth sections 3241 and 3242 should be limited. By limiting the per-turn width difference within the first, second, third, and fourth sections 3231 and 3232, the per-turn width of the charging coil assembly 30 is highly consistent, ensuring winding uniformity and fostering a stable magnetic field, ensuring efficient energy transfer during charging.

[0122] It should be noted that when the electronic device 300 is matched with a charging device 100 for wireless charging in another charging scenario, it needs to be magnetically attracted to the charging device 100 through a magnetic structure 50. The magnetic structure 50 can be set on the electronic device 300 or on a protective shell 40 adapted for the electronic device 300. This application does not limit this.

[0123] In some embodiments, reference Figure 15 , Figure 15A schematic structural diagram of a charging device, a powered device, and a protective shell for wireless charging in another charging scenario provided for some embodiments of the present application. The electronic components in the present application include a protective shell 40 and an electronic device 300. The protective shell 40 is arranged outside the electronic device 300, and the protective shell 40 is provided with a magnetic structure 50. If the magnetic structure 50 is arranged on the electronic device 300, the magnetic structure 50 needs to be arranged on the outer peripheral side of the charging coil assembly 30, and the size of the magnetic structure 50 will limit the size of the charging coil assembly 30. However, by setting the magnetic structure 50 on the protective shell 40, the magnetic structure 50 will not affect the size of the charging coil assembly 30, and the size of the charging coil assembly 30 can be set large enough to improve the charging efficiency.

[0124] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging coil assembly, characterized in that: include: The coil body includes a first layer of coils, the first layer of coils includes a first coil segment and a second coil segment arranged along the circumference of the first layer of coils, and the center of the first coil segment is spaced apart from the center of the second coil segment.

2. The charging coil assembly according to claim 1, wherein: Along the circumference of the first layer of coils, the first coil segment extends along a polygonal line or a circular arc line; Along the circumference of the first layer of coils, the second coil section extends along a polygonal line or a circular arc line.

3. The charging coil assembly according to claim 1, wherein: The first layer of coils includes a first coil portion and a second coil portion located outside the first coil portion, wherein the width of each coil turn in the first coil portion is smaller than the width of each coil turn in the second coil portion; The first coil portion includes a first section and a second section arranged along the coil body; the second coil portion includes a third section and a fourth section arranged along the coil body; The third section is located outside the first section, the fourth section is located outside the second section, the first section and the third section form the first coil section, and the second section and the fourth section form the second coil section.

4. The charging coil assembly according to claim 3, wherein: The coil body further includes a second layer of coils stacked on the first layer of coils, the second layer of coils including a fifth coil segment and a sixth coil segment arranged along the circumference of the second layer of coils, the center of the fifth coil segment being spaced apart from the center of the sixth coil segment; The fifth coil section is opposite to the first coil section, and the sixth coil section is opposite to the second coil section.

5. The charging coil assembly according to claim 3, wherein: The coil body further includes a second layer of coils stacked on the first layer of coils, the second layer of coils including a fifth coil segment and a sixth coil segment arranged along the circumference of the second layer of coils, the center of the fifth coil segment coincides with the center of the sixth coil segment; The fifth coil section is opposite to the first coil section.

6. The charging coil assembly according to claim 4 or 5, characterized in that: The second layer coil includes a third coil part and a fourth coil part located outside the third coil part; the third coil part and the first coil part are connected in parallel to form a parallel section, and the second coil part, the parallel section and the fourth coil part are arranged in series in sequence.

7. The charging coil assembly according to claim 4 or 5, characterized in that: Also includes: An insulating layer is provided between the first layer coil and the second layer coil.

8. The charging coil assembly according to any one of claims 1 to 5, characterized in that: The first layer of coils further includes a third coil segment and a fourth coil segment arranged along the circumference of the first layer of coils, the fourth coil segment being located on a side of the first coil segment and the third coil segment away from the second coil segment; the center of the third coil segment and the center of the fourth coil segment coincide with the center of the first coil segment; Along the circumference of the first layer of coils, the third coil segment extends along a polygonal line or a circular arc line; along the circumference of the first layer of coils, the fourth coil segment extends along a polygonal line or a circular arc line.

9. The charging coil assembly according to any one of claims 1 to 5, characterized in that: The outer diameter of the first coil section is greater than or equal to 44 mm and less than or equal to 54 mm; the inner diameter of the first coil section is greater than or equal to 14 mm and less than or equal to 28 mm.

10. The charging coil assembly according to any one of claims 1 to 5, characterized in that: The outer diameter of the second coil section is greater than or equal to 38 mm and less than or equal to 46 mm; the inner diameter of the second coil section is greater than or equal to 10 mm and less than or equal to 20 mm.

11. The charging coil assembly according to any one of claims 1 to 5, characterized in that: The distance between half of the outer diameter of the first coil segment and half of the inner diameter of the first coil segment is a first distance, the distance between half of the outer diameter of the second coil segment and half of the inner diameter of the second coil segment is a second distance, and the difference between the first distance and the second distance is greater than or equal to -2 mm and less than or equal to 2 mm.

12. The charging coil assembly according to any one of claims 1 to 5, characterized in that: The distance between the center of the first coil segment and the center of the second coil segment is a third distance, half of the outer diameter of the second coil segment is a fourth distance, and the sum of the third distance and the fourth distance is greater than half of the outer diameter of the first coil segment and is less than or equal to 34 mm.

13. The charging coil assembly according to claim 3, wherein: The difference in line width per turn between the first section and the second section is less than or equal to 0.1 mm, and the difference in line width per turn between the third section and the fourth section is less than or equal to 0.2 mm.

14. An electronic device, characterized in that: include: A shell, and a charging coil assembly accommodated in the shell, wherein the charging coil assembly is the charging coil assembly according to any one of claims 1-13.

15. The electronic device according to claim 14, characterized in that The electronic device is in the shape of a rectangular plate and further includes a camera decoration. The camera decoration and the charging coil assembly are arranged along the length direction of the electronic device, and along the length direction of the electronic device, the second coil section is located on the side of the first coil section facing away from the camera decoration.

16. An electronic component, characterized in that The electronic device comprises a protective shell and the electronic device according to claim 14 or 15, wherein the protective shell is arranged outside the electronic device and is provided with a magnetic structure.

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