Wireless transmitter and wireless charging system

Abstract

The utility model relates to a wireless transmitter and a wireless charging system. The wireless transmitter comprises a closed barrel body; the wireless transmitter and the wireless charging system are simple in structure and ingenious in design, the transmitting coil is arranged in the closed barrel body, the transmitting coil is spirally arranged in the height direction of the barrel body along the inner side wall of the barrel body, the overall outer contour of the transmitting coil is of a straight barrel-shaped structure, it can be guaranteed that the thread pitches of all circles in the transmitting coil are the same, and the service life of the transmitting coil is prolonged. The magnetic field intensity difference of each section of the transmitting coil is not large, the magnetic field transmitting efficiency of the transmitting coil is more stable, the coupling rate of the transmission efficiency is further improved, the diameter of the transmitting coil cannot be changed due to multi-layer arrangement, the occupied area is not changed, the size is small, carrying is convenient, and the user experience is better.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging equipment, and more specifically, to a wireless transmitter and a wireless charging system. Background Art

[0002] Wireless charging devices are devices that use the principle of electromagnetic induction for charging. Among them, the wireless transmitter is an important component of the wireless charging device. It is responsible for transmitting electrical energy to the wireless receiver wirelessly to charge the device.

[0003] Most wireless transmitters in the prior art are disc-shaped structures, such as the transmitting module of a wireless charging device disclosed in patent number CN202123220008.3, which includes a circular charging base, and a transmitting coil is arranged in the center of the charging base; the transmitting coil is arranged in a spiral on the same horizontal plane, the circumference of the outer circle is greater than the circumference of the inner circle, and the multiple layers of the coil are arranged in rotation around a central axis; in the case of such a coil setting, if the coil is a single-layer setting, the magnetic field strength inside the coil will be greater than the magnetic field strength outside, because the current flows in the centripetal direction inside the coil, which will produce a strong magnetic field concentrated in the central area of ​​the coil, and the magnetic field strength inside and outside is quite different. As the distance from the center of the coil increases, the magnetic field strength will gradually weaken; if the coil is double-layer or multi-layer, and the current direction of each layer is opposite, then in some positions, the magnetic field on the inside may be smaller than the magnetic field on the outside, because the outer layer may enhance or offset the magnetic field on the inside. It can be seen from this that the large difference in magnetic field strength between the inside and outside may lead to higher energy transmission efficiency in certain areas of space and lower transmission efficiency in other areas, resulting in unstable transmission efficiency of the wireless coil and low coupling rate of effective transmission; furthermore, the multiple layers of the transmitting coil are arranged in a rotation around a central axis on the same plane, which will also increase the floor space, thereby increasing the size of the wireless transmitter and making it inconvenient to carry. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a wireless transmitter and a wireless charging system in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a wireless transmitter, which includes a closed barrel; the barrel is provided with an installation cavity and a transmitting coil arranged in the installation cavity; the transmitting coil is spirally arranged along the inner side wall of the barrel toward the height direction of the barrel, and the outer contour of the transmitting coil is arranged in a straight cylinder shape; the two ends of the transmitting coil are respectively electrically connected to a first power supply line; the barrel is provided with a first through hole for the first power supply line to pass through;

[0006] The wireless transmitter of the utility model, wherein the transmitting coil comprises an inner transmitting coil and an outer transmitting coil connected to each other; the inner transmitting coil and the outer transmitting coil are both spirally arranged along the height of the barrel; the inner transmitting coil and the outer transmitting coil are both arranged in a straight cylindrical shape;

[0007] The wireless transmitter of the utility model, wherein a magnetic core for enhancing the magnetic effect of the transmitting coil is arranged in the middle of the transmitting coil in the barrel;

[0008] The wireless transmitter described in the utility model, wherein the barrel body comprises a first base column with an opening at one end, and a sealing cover closing the opening; the opening is communicated with the installation cavity; the first base column and the sealing cover are tightly connected through a first locking member; the first through hole is located on the sealing cover;

[0009] The wireless transmitter of the utility model further comprises a transmitting module and a power plug electrically connected to the transmitting module; the transmitting module is connected to the transmitting coil via the first power supply line;

[0010] On the other hand, the utility model also provides a wireless charging system, comprising any of the wireless transmitters as described above, and further comprising a wireless receiver that cooperates with the wireless transmitter for wireless charging;

[0011] The wireless charging system described in the utility model, wherein the wireless receiver includes a second base column; a charging compartment for inserting the transmitting coil is provided in the middle of the second base column; an annular sealed cavity is provided in the second base column at the periphery of the charging compartment; a receiving coil spirally arranged in the height direction of the second base column is provided in the annular sealed cavity; two ends of the receiving coil are electrically connected to a second power supply line respectively; a second through hole is provided on the second base column for the second power supply line to pass through; the first threading hole and the second threading hole constitute the second through hole;

[0012] The wireless charging system described in the utility model, wherein the second base column comprises an inner cylinder and an outer cylinder sleeved on the inner cylinder; a positioning groove for placing the receiving coil is provided in the middle of the outer surface of the inner cylinder; the bottom surface and the side surface of the positioning groove are mutually enclosed with the inner side wall of the outer cylinder to form the annular sealing cavity;

[0013] The wireless charging system described in the utility model, wherein one end of the outer tube is provided with a blocking portion for preventing the inner tube from detaching from the inner tube to the outside, and the other end is provided with a first threading hole communicating with the annular sealing cavity and a positioning hole for the second locking member to pass through; one end of the inner tube is provided with a second threading hole communicating with the positioning groove and corresponding to the first threading hole, and a threaded hole corresponding to the positioning hole and locked with the second locking member;

[0014] The wireless charging system described in the utility model further includes a vehicle-mounted main control module and a battery electrically connected to the vehicle-mounted main control module; the vehicle-mounted main control module is connected to the receiving coil via the second power supply line.

[0015] The beneficial effects of the utility model are that the wireless transmitter and the wireless charging system have a simple structure and an ingenious design. A transmitting coil is arranged in a closed barrel body, and the transmitting coil is spirally arranged along the inner wall of the barrel body toward the height direction of the barrel body. The overall outer contour of the transmitting coil is a straight cylindrical structure, which can ensure that the pitch of each circle in the generating coil is the same. It can not only ensure that the magnetic field strength of each section of the transmitting coil is not much different, making the magnetic field transmission efficiency of the transmitting coil more stable, and further improving the coupling rate of the transmission efficiency, but also the transmitting coil will not change its diameter due to the multi-layer arrangement, the floor space remains unchanged, the volume is small, it is easy to carry, and the user experience is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0017] Figure 1 It is a structural schematic diagram of a wireless transmitter 10 of the first embodiment of the utility model;

[0018] Figure 2 yes Figure 1 An internal cross-sectional view of the middle barrel 11;

[0019] Figure 3 yes Figure 1 A three-dimensional exploded view of the middle barrel 11;

[0020] Figure 4 This is a schematic diagram of the structure of a wireless charging system according to the second embodiment of the present utility model;

[0021] Figure 5 yes Figure 4 An internal cross-sectional view of the second base column 21;

[0022] Figure 6 yes Figure 4 A three-dimensional exploded view of the second base column 21. DETAILED DESCRIPTION

[0023] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0026] Moreover, the terms "up, down, front, back, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0028] A wireless transmitter 10 in a preferred embodiment of the present utility model is as follows: Figure 1-3As shown, it includes a closed barrel body 11; a mounting cavity 12 and a transmitting coil 13 arranged in the mounting cavity 12 are provided in the barrel body 11; the transmitting coil 13 is spirally arranged along the inner wall of the barrel body 11 in the height direction of the barrel body 11, and the outer contour of the transmitting coil 13 is arranged in a straight cylinder shape, and the wires in the coil are all of the same diameter, that is, the pitch of the coil is the same, so that the magnetic field strength at each point of the transmitting coil is not much different; the two ends of the transmitting coil 13 are respectively electrically connected to the first power supply line 14; in this embodiment, the first power supply line 14 is connected to alternating current; a first through hole 15 for the first power supply line 14 to pass through is provided on the barrel body 11, and in this embodiment, two first through holes 15 are provided, and the two first power supply lines 14 pass through the two first through holes 15 respectively. Optionally, one first through hole 15 can also be provided, and both first power supply lines 14 pass through the first through hole 15, and the structure is stable.

[0029] The wireless transmitter has a simple structure and ingenious design. A transmitting coil is arranged in a closed barrel body. The transmitting coil is spirally arranged along the inner wall of the barrel body in the height direction of the barrel body, and the overall outer contour of the transmitting coil is a straight cylindrical structure, which can ensure that the pitch of each circle in the generating coil is the same. It can not only ensure that the magnetic field strength of each section of the transmitting coil is not much different, making the magnetic field transmission efficiency of the transmitting coil more stable, but also further improve the coupling rate of transmission efficiency. The transmitting coil will not change its diameter due to the multi-layer setting, the footprint remains unchanged, the size is small, it is easy to carry, and the user experience is better.

[0030] In one embodiment, in order to increase the magnetic field strength of the transmitting coil, the transmitting coil 13 includes an inner transmitting coil 131 and an outer transmitting coil 132 connected to each other; the inner transmitting coil 131 and the outer transmitting coil 132 are both arranged in a spiral along the height of the barrel body 11; the inner transmitting coil 131 and the outer transmitting coil 132 are both arranged in a straight cylindrical shape.

[0031] Optionally, a magnetic core 16 for enhancing the magnetic effect of the transmitting coil 13 is provided in the barrel 11 at the middle of the transmitting coil 13. In another embodiment, the receiving coil may not need a magnetic core, thereby reducing costs.

[0032] Furthermore, the barrel body 11 includes a first base column 112 with an opening 111 at one end, and a sealing cover 113 closing the opening 111; the opening 111 is communicated with the installation cavity 12; in one embodiment, both ends of the transmitting coil are facing the opening 111 for easy connection; the first base column 112 and the sealing cover 113 are tightly connected by a first locking member, which is convenient for installation. The first locking member is a fastening screw in the prior art, and the first through hole 15 is located on the sealing cover 113, which has a simple structure.

[0033] Furthermore, the wireless transmitter 10 also includes a transmitter module 17 and a power plug 18 electrically connected to the transmitter module 17; the transmitter module 17 is connected to the transmitter coil 13 in the barrel 11 through the first power supply line 14; optionally, the transmitter module 17 can use the wireless charging transmitter chips such as GWW6133, GWW6117, GWW6025 in the prior art, which have the characteristics of high efficiency, support for multiple fast charging protocols, and secure communication, and can provide users with a comprehensive wireless power system solution. It is worth noting that the wireless transmitter in the utility model does not involve circuit improvements and information communication improvements, but only structural improvements.

[0034] Embodiment 2

[0035] This embodiment provides a wireless charging system. Figure 4-6 As shown, it includes the wireless transmitter 10 as described in the first embodiment, and further includes a wireless receiver 20 that cooperates with the wireless transmitter 10 for wireless charging.

[0036] Furthermore, in order to avoid the misalignment of the transmitting coil and the receiving coil during charging in the prior art, which affects the coupling efficiency; the wireless receiver 20 includes a second base column 21; a charging compartment 22 for inserting the transmitting coil 13 is provided in the middle of the second base column 21; it is worth noting that the shape of the charging compartment 22 is adapted to the outer contour of the barrel body 11, and there is no need to consider the offset and air gap problems when the barrel body 11 is inserted into the charging compartment 22, and the transmission efficiency is high; an annular sealed cavity is provided in the second base column 21 at the periphery of the charging compartment 22; a receiving coil 23 spirally arranged in the height direction of the second base column 21 is provided in the annular sealed cavity; the outer contour of the receiving coil 23 is also straight cylindrical; the receiving coil 23 corresponds to the transmitting coil 13 in the wireless transmitter 10; the two ends of the receiving coil 23 are respectively electrically connected to the second power supply line 24; the second base column 21 is provided with a second through hole 25 for the second power supply line 24 to pass through.

[0037] The wireless charging system has a simple structure and an ingenious design. By arranging a transmitting coil in a closed barrel body, the transmitting coil is spirally arranged along the inner wall of the barrel body in the height direction of the barrel body, and the overall outer contour of the transmitting coil is a straight cylindrical structure, which can ensure that the pitch of each circle in the generating coil is the same, not only can it ensure that the magnetic field strength of each section of the transmitting coil is not much different, making the magnetic field transmission efficiency of the transmitting coil more stable, and further improving the coupling rate of transmission efficiency, and the transmitting coil will not change its diameter size due to the multi-layer arrangement, the floor space remains unchanged, the volume is small, easy to carry, and the user experience is better. When charging, it is only necessary to insert the barrel of the wireless transmitter into the charging compartment in the second base column, so that the transmitting coil and the receiving coil are naturally aligned, and the receiving coil is sleeved on the outside of the transmitting coil, which can not only generate a transmission magnetic field between the receiving coil and the transmitting coil, but also does not need to consider alignment, and is worry-free to use; and this sleeve arrangement method also has a higher coupling rate than the planar contact in the prior art, which can greatly improve the transmission efficiency between the transmitting coil and the receiving coil.

[0038] In one embodiment, the second base column 21 includes an inner cylinder 211 and an outer cylinder 212 sleeved on the inner cylinder 211; a positioning groove 2111 for placing the receiving coil 23 is provided in the middle of the outer surface of the inner cylinder 211; the bottom surface and the side surface of the positioning groove 2111 and the inner wall of the outer cylinder 212 are mutually enclosed to form an annular sealed cavity, which has a simple structure and can well protect the receiving coil. The receiving coil can be positioned by providing a positioning groove on the inner cylinder 211 to prevent it from moving arbitrarily in the annular sealed cavity and deviating from the preset magnetic field transmission range.

[0039] Furthermore, one end of the outer cylinder 212 is provided with a sealing portion 2121 for preventing the inner cylinder 211 from detaching from the outer cylinder 212 to the outside, and the other end is provided with a first threading hole 251 connected to the annular sealing cavity and a positioning hole 2122 for the second locking member to pass through; one end of the inner cylinder 211 is provided with a second threading hole 252 connected to the positioning groove 2111 and corresponding to the first threading hole 251, and a threaded hole 2112 corresponding to the positioning hole 2122 and threadedly locked with the second locking member. The first threading hole 251 and the second threading hole 252 constitute the second through hole 25; the blocking portion 2121 is arranged in an annular plate-like structure, and the inner cylinder is located within the coverage range of the blocking portion, and the blocking portion 2121 can not only prevent the inner cylinder 211 from being separated from the outer cylinder 212, but also prevent dust or other impurities from falling into the sealed cavity, and the protection is good; during installation, it is only necessary to fix the receiving coil on the positioning groove 2111 of the inner cylinder 211, and then push the inner cylinder 211 into the outer cylinder 212 until the end face of the inner cylinder abuts against the blocking portion 2121, at this time, the first threading hole corresponds to and is connected with the second threading hole, which is convenient for the routing of the second power supply line, and the positioning hole 2122 corresponds to and is connected with the threaded hole 2112, and then the second locking member, that is, the screw passes through the positioning hole and is fixed to the threaded hole to fix the inner cylinder in the outer cylinder, and the installation is simple.

[0040] Furthermore, the wireless charging system also includes a vehicle-mounted main control module 26 and a battery 27 electrically connected to the vehicle-mounted main control module 26; the vehicle-mounted main control module 26 is connected to the receiving coil 23 via a second power supply line 24. The vehicle-mounted main control module 26 can use the CPSQ-OMX14XW dedicated to vehicle-mounted wireless charging in the prior art, or can use the CPSQ8100 chip or other high-power charging main control module in the prior art;

[0041] The wireless charging system has a simple structure, high charging efficiency, convenient use and high practicality.

[0042] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A wireless transmitter, characterized in that: It comprises a closed barrel body; the barrel body is provided with an installation cavity and a transmitting coil arranged in the installation cavity; the transmitting coil is spirally arranged along the inner wall of the barrel body in the height direction of the barrel body, and the outer contour of the transmitting coil is arranged in a straight cylinder shape; the two ends of the transmitting coil are respectively electrically connected to a first power supply line; the barrel body is provided with a first through hole for the first power supply line to pass through.

2. The wireless transmitter according to claim 1, characterized in that The transmitting coil comprises an inner transmitting coil and an outer transmitting coil which are connected to each other; the inner transmitting coil and the outer transmitting coil are both arranged in a spiral shape along the height of the barrel; and the inner transmitting coil and the outer transmitting coil are both arranged in a straight cylindrical shape.

3. The wireless transmitter according to claim 2, characterized in that A magnetic core for enhancing the magnetic effect of the transmitting coil is arranged in the barrel at the middle of the transmitting coil.

4. The wireless transmitter according to any one of claims 1 to 3, characterized in that: The barrel body includes a first base column with an opening at one end, and a sealing cover that closes the opening; the opening is connected to the installation cavity; the first base column and the sealing cover are tightly connected via a first locking piece; and the first through hole is located on the sealing cover.

5. The wireless transmitter according to any one of claims 1 to 3, characterized in that: The wireless transmitter also includes a transmitting module and a power plug electrically connected to the transmitting module; the transmitting module is connected to the transmitting coil via the first power supply line.

6. A wireless charging system, comprising the wireless transmitter according to any one of claims 1 to 5, characterized in that: Also included is a wireless receiver that cooperates with the wireless transmitter for wireless charging.

7. The wireless charging system according to claim 6, characterized in that: The wireless receiver includes a second base column; a charging compartment for inserting the transmitting coil is provided in the middle of the second base column; an annular sealed cavity is provided in the second base column at the periphery of the charging compartment; a receiving coil spirally arranged in the height direction of the second base column is provided in the annular sealed cavity; the two ends of the receiving coil are respectively electrically connected to a second power supply line; a second through hole for the second power supply line to pass through is provided on the second base column.

8. The wireless charging system according to claim 7, characterized in that: The second base column includes an inner tube and an outer tube sleeved on the inner tube; a positioning groove for placing the receiving coil is provided in the middle of the outer surface of the inner tube; the bottom surface and the side surface of the positioning groove are mutually enclosed with the inner side wall of the outer tube to form the annular sealing cavity.

9. The wireless charging system according to claim 8, characterized in that: One end of the outer cylinder is provided with a sealing portion for preventing the inner cylinder from detaching from the outer cylinder to the outside, and the other end is provided with a first threading hole connected with the annular sealing cavity and a positioning hole for the second locking member to pass through; one end of the inner cylinder is provided with a second threading hole connected with the positioning groove and corresponding to the first threading hole, and a threaded hole corresponding to the positioning hole and locked with the second locking member; the first threading hole and the second threading hole constitute the second through hole.

10. The wireless charging system according to any one of claims 7 to 9, characterized in that: The wireless charging system also includes a vehicle-mounted main control module and a battery electrically connected to the vehicle-mounted main control module; the vehicle-mounted main control module is connected to the receiving coil via the second power supply line.

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