Coil module with NTC (Negative Temperature Coefficient)

Abstract

The utility model relates to the technical field of wireless charging, in particular to a coil module with NTC (Negative Temperature Coefficient), which comprises a coil, four corners of an outer ring and four corners of an inner ring after the coil is wound are arc angles; the four corners of the first adhesive layer are arc angles; one end of the NTC thermistor element extends outwards to form a resistance wire attached to the coil; the four corners of the foam layer are all arc corners; the four corners of the release paper are all arc corners; and the four corners of the second adhesive layer are arc angles. According to the utility model, the square-round coil is arranged, the diameter of 0.08 * 105 strands of wires is relatively large, the receiving power is relatively large, the resistance is reduced, the coil is not easy to heat, the foam layer is arranged at the back of the magnetic plate, so that the damage of the module caused by external force impact or vibration can be effectively reduced, and the durability and the stability of the module can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging, specifically to a coil module with NTC. Background Technology

[0002] Wireless charging technology originates from wireless power transfer technology. Its principle involves the transfer of energy between the charger and the device via a magnetic field. It can be divided into two types: low-power wireless charging and high-power wireless charging. Low-power wireless charging often uses electromagnetic induction; high-power wireless charging often uses resonant charging, where the power supply device transfers energy to the device.

[0003] Currently, when wireless charging receiver coils are assembled into finished products, they generally use dual-wire receivers with a wire diameter of about 0.3mm or 0.08*24 strand wire. The wire diameter of this type of wire is relatively thin, so its receiving power is poor, and the module is more susceptible to damage when subjected to external impact or vibration, resulting in poor practicality. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned defects and provide a coil module with NTC.

[0005] The purpose of this utility model is achieved through the following method: a coil module with NTC, comprising:

[0006] A magnetic suction plate, wherein all four corners of the magnetic suction plate are rounded.

[0007] A coil is wound into a rectangle from the outside in and mounted on a magnetic plate. The four corners of the outer and inner loops of the coil are rounded.

[0008] The first adhesive layer is installed between the coil and the magnetic plate. The first adhesive layer has a hollow structure and all four corners of the first adhesive layer are rounded.

[0009] An NTC thermistor element is mounted on the magnetic plate on the inner ring of the coil, and one end of the NTC thermistor element extends outward with a resistance wire that is in contact with the coil.

[0010] A foam layer is installed at the bottom of the magnetic plate, and the four corners of the foam layer are rounded.

[0011] Release paper is installed at the bottom of the foam layer, and the four corners of the release paper are rounded.

[0012] The second adhesive layer is installed between the foam layer and the release paper, and all four corners of the second adhesive layer are rounded.

[0013] Furthermore, one end of the magnetic suction plate, the first adhesive layer, the foam layer, the release paper, and the second adhesive layer are all provided with interconnected slots. By providing slots, the protruding end of the coil can be accommodated, thereby reducing the thickness of the module and preventing the end of the coil from being pushed upwards due to protrusion.

[0014] Furthermore, both ends of the coil extend outwards.

[0015] Furthermore, one end of the coil extends outward from the outer ring, and the other end of the coil extends outward from the slot at the bottom of the inner ring.

[0016] Furthermore, one corner of the release paper is provided with an outwardly extending protrusion, which facilitates the release paper being spread off the foam layer.

[0017] Furthermore, the magnetic plate is equipped with an adhesive tape layer for attaching with the resistance wire, and the resistance wire at one end of the NTC thermistor element is fixed to the magnetic plate through the adhesive tape layer.

[0018] The beneficial effects of this utility model are as follows: by setting a square-round coil and using a relatively thick wire diameter of 0.08*105 strands, the receiving power is greater, the resistance is reduced, and the coil is less prone to overheating. By setting a foam layer on the back of the magnetic plate, the damage caused to the module when subjected to external impact or vibration can be effectively reduced, which can effectively improve the durability and stability of the module. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a coil module with NTC according to the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of a coil module with NTC according to the present invention;

[0021] Figure 3 This is an exploded three-dimensional view of a coil module with NTC according to the present invention.

[0022] Figure 4 This is an exploded three-dimensional view of a coil module with NTC according to the present invention.

[0023] Figure 5 This is a top view of a coil module with an NTC according to the present invention;

[0024] Figure 6 This is a bottom view of a coil module with NTC according to the present invention.

[0025] In the diagram, 1 is the magnetic chuck; 2 is the coil; 3 is the first adhesive layer; 4 is the NTC thermistor element; 5 is the foam layer; 6 is the release paper; 7 is the second adhesive layer; 8 is the protrusion; 9 is the adhesive tape layer; 10 is the slot; and 11 is the resistance wire. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0027] Please see Figures 1-6 The wireless charging magnetic heat dissipation TX coil 2 module specifically implemented includes:

[0028] Magnetic suction plate 1, wherein all four corners of the magnetic suction plate 1 are rounded corners;

[0029] Coil 2 is wound into a rectangle from the outside in and installed on magnetic plate 1. The four corners of the outer and inner rings of coil 2 after winding are rounded.

[0030] The first adhesive layer 3 is installed between the coil 2 and the magnetic plate 1. The first adhesive layer 3 has a hollow structure and all four corners of the first adhesive layer 3 are rounded corners.

[0031] An NTC thermistor element 4 is mounted on the inner ring of the magnetic plate 1 and the coil 2. One end of the NTC thermistor element 4 extends outward with a resistance wire 11 that is in contact with the coil 2.

[0032] Foam layer 5 is installed at the bottom of the magnetic plate 1, and the four corners of the foam layer 5 are all rounded.

[0033] Release paper 6 is installed at the bottom of the foam layer 5, and the four corners of the release paper 6 are rounded.

[0034] The second adhesive layer 7 is installed between the foam layer 5 and the release paper 6, and the four corners of the second adhesive layer 7 are all rounded.

[0035] The magnetic plate 1, the first adhesive layer 3, the foam layer 5, the release paper 6, and the second adhesive layer 7 are all provided with interconnected slots 10 at one end. By providing slots 10, the protruding end of the coil 2 can be accommodated, thereby reducing the thickness of the module and preventing the end of the coil 2 from being pushed upwards due to protrusion.

[0036] Both ends of coil 2 extend outwards. One end of coil 2 extends outwards from the outer ring, and the other end of coil 2 extends outwards from the slot 10 at the bottom of the inner ring.

[0037] The release paper 6 has an outwardly extending protrusion 8 on one corner, which facilitates the release paper 6 being spread off the foam layer 5. An adhesive layer 9 for attaching to the resistance wire 11 is installed on the magnetic plate 1, and the resistance wire 11 at one end of the NTC thermistor element 4 is fixed to the magnetic plate 1 by the adhesive layer 9.

[0038] The working principle of this utility model embodiment is as follows: the coil 2 is installed after being wound into a square shape from the outside to the inside, and is installed on the magnetic plate 1 through the first adhesive layer 3. The coil 2 uses 0.08*105 strand wire, and the magnetic plate 1 is 42.4*51.7*1.0mm. The foam layer 5 is installed at the bottom of the magnetic plate 1, and the release paper 6 is installed at the bottom of the foam layer 5 through the second adhesive layer 7. When in use, the release paper 6 is torn open through the protrusion 8 for installation.

[0039] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A coil module with an NTC, characterized in that, include: A magnetic suction plate, wherein all four corners of the magnetic suction plate are rounded. A coil is wound into a rectangle from the outside in and mounted on a magnetic plate. The four corners of the outer and inner loops of the coil are rounded. The first adhesive layer is installed between the coil and the magnetic plate. The first adhesive layer has a hollow structure and all four corners of the first adhesive layer are rounded. An NTC thermistor element is mounted on the magnetic plate on the inner ring of the coil, and one end of the NTC thermistor element extends outward with a resistance wire that is in contact with the coil. A foam layer is installed at the bottom of the magnetic plate, and the four corners of the foam layer are rounded. Release paper is installed at the bottom of the foam layer, and the four corners of the release paper are rounded. The second adhesive layer is installed between the foam layer and the release paper, and all four corners of the second adhesive layer are rounded.

2. The coil module with NTC according to claim 1, characterized in that: The magnetic plate, the first adhesive layer, the foam layer, the release paper, and the second adhesive layer are all provided with interconnected slots at one end.

3. A coil module with NTC according to claim 2, characterized in that: Both ends of the coil extend outwards.

4. A coil module with NTC according to claim 3, characterized in that: One end of the coil extends outward from the outer ring, and the other end of the coil extends outward from the slot at the bottom of the inner ring.

5. A coil module with NTC according to any one of claims 1-4, characterized in that: The release paper has an outwardly extending protrusion on one corner.

6. A coil module with NTC according to any one of claims 1-4, characterized in that: The magnetic plate is fitted with an adhesive layer for attaching to the resistance wire.

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