Plated coil transmitting module

Abstract

The utility model relates to a coating coil transmitting module, which comprises a coil body, a parylene coating is arranged on the surface of the coil body, and coil pins extending outwards are arranged at two ends of the coil body; the large magnetic sheet is arranged at one end of the coil body and completely covers the coil body; the small magnetic sheet is arranged in the center of the coil body and is connected with the large magnetic sheet; and the NTC thermistor is arranged in the center of the coil body and is connected with the large magnetic sheet, and the NTC thermistor is connected with a resistor pin extending outwards. The parylene plating layer is arranged on the periphery of the coil body of the transmitting module, a sealing film layer is formed on the surface of the coil body, saline pinholes in the surface of the coil are subsequently tested to be OPCS, the surface of the coil achieves an insulation effect, water operation can be achieved, and the transmitting module is suitable for outdoor electronic products such as an unmanned aerial vehicle charging station. And meanwhile, the NTC thermistor is arranged, so that the temperature of the coil is monitored in real time so as to be convenient to control.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging, in particular to a plated coil transmitting module. Background Art

[0002] The wireless charging transmitter coil is an important part of wireless charging technology. Its function and structure are based on the principle of electromagnetic induction, and it is used to transmit electrical energy to the receiver without physical contact. When working, the transmitter coil generates a changing magnetic field by energizing it. This changing magnetic field will induce the coil in the receiver, thereby generating an induced current in the receiver and realizing electrical energy transmission. The transmitter coil includes a coil composed of a wire and a magnetic material arranged on one side of the coil.

[0003] With the development of the wireless charging field and the formulation of wireless charging standards, wireless charging receiving coils are currently assembled into finished products. Most of the finished products are for indoor use. The standard given by the supplier of the brine pinhole material for the conductor coil is less than 2*200 / 50 meters. The measured brine pinholes of the coil are around 60 PCS pinholes. The insulation of water-carrying operations is poor, and it is not suitable for outdoor electronic products such as drones. In addition, some products require greater transmission power and distance, so customization requirements are made to the coil manufacturers to increase the transmission power by replacing the wire with a larger diameter and increasing the volume, but this will have strict requirements on the temperature resistance of the transmitting module. Therefore, improvement is needed. Utility Model Content

[0004] Based on this, the utility model provides a coated coil transmitting module to solve the above problems.

[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] A coated coil transmitting module, comprising:

[0007] A coil body, wherein the surface of the coil body is provided with a parylene coating, and both ends of the coil body are provided with coil pins extending outward;

[0008] A large magnetic sheet, which is disposed at one end of the coil body and completely covers the coil body;

[0009] A small magnetic piece, which is disposed at the center of the coil body and connected to the large magnetic piece; and

[0010] An NTC thermistor is arranged at the center of the coil body and connected to the large magnetic sheet, and is connected to a resistor pin extending outward.

[0011] Furthermore, a PET black film is also included; the PET black film covers the two end surfaces of the large magnetic sheet.

[0012] Furthermore, the PET black film on one side adjacent to the coil body covers the coil body and the NTC thermistor.

[0013] Furthermore, the position where the coil pin passes through the coil body outward is connected with UV curing glue.

[0014] Furthermore, the position where the resistor pin passes through the coil body outward is connected with UV curing glue.

[0015] Furthermore, a heat shrink tube is disposed on the outer sleeve of the coil pin; and a connecting section is formed at the lead-out end of the coil pin.

[0016] Furthermore, the large magnetic sheet and the small magnetic sheet are both made of ferrite magnetic sheets.

[0017] Furthermore, a release film is connected to an end surface of the PET black film facing away from the coil body.

[0018] The beneficial effects of the utility model are:

[0019] 1. Good insulation. The coil body of this transmitter module is provided with a parylene coating on the periphery to form a sealing film layer on the surface of the coil body. The subsequent test shows that the brine pinholes on the coil surface are OPCS. The coil surface achieves insulation effect and can operate in water, which is suitable for outdoor electronic products such as drone charging stations.

[0020] 2. Long launch distance. By setting up two large and small magnetic pieces, the small magnetic piece in the middle is conducive to the gathering of magnetic lines of force, increasing the launch distance under the condition of the same thickness, and the structure is compact.

[0021] 3. Temperature monitoring, easy to control. By setting up an NTC thermistor, the thermistor NTC head is close to the coil. When the coil module is in use, it will sense when it reaches a high temperature. If the temperature exceeds the limit, the NTC will be damaged first, which will protect other parts. It can be used in temperature measurement, temperature compensation, surge current suppression and overheating protection. In addition, the magnetic sheet, wire, glue, thermistor, black film and double-sided adhesive structure used for connection of this transmitter module all meet the requirements of automotive grade and can withstand the temperature requirement of 120 degrees, which is more suitable for use in drones. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0024] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the coating arrangement of the coil body of the present invention.

[0026] 10. Coil body; 11. Coil pin; 12. Connecting section; 20. Large magnetic sheet; 30. Small magnetic sheet; 40. NTC thermistor; 41. Resistor pin; 50. PET black film; 60. UV curing glue; 70. Heat shrink tube; 80. Release film. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] like Figure 1-Figure 4 As shown, a coated coil transmitting module includes: a coil body 10, a large magnetic sheet 20, a small magnetic sheet 30, an NTC thermistor 40 and a PET black film 50;

[0031] The surface of the coil body 10 is provided with a parylene coating, and both ends of the coil body 10 are provided with coil pins 11 extending outwards; further, in order to protect the coil pins 11, the coil pins 11 are covered with a heat shrink tube 70; the heat shrink tube 70 is located at the lead-out end of the coil pin 11 and has a connecting section 12;

[0032] In this embodiment, the wire material of the coil body 10 is composed of φ0.06x200P enameled stranded wire, and uses CW winding direction, lead cross wire type, and the parylene coating is plated with parylene C powder (poly-p-dichlorotoluene); while the standard given by the supplier of brine pinhole materials for conventional transmitting coils is less than 2*200 / 50 meters, and the actual measured brine pinholes of the coil are about 60PCS pinholes. The coil body 10 in the present transmitting module forms a sealing film layer on the surface of the coil body 10 by adding a parylene coil surface coating process. The subsequent test shows that the brine pinholes on the coil surface are OPCS, and the coil surface achieves an insulation effect, can be operated with water, and is suitable for outdoor electronic products such as drone charging stations; it is worth noting that, if Figure 4 As shown, during the coating operation, the connecting section 12 of the coil pin 11 needs to be shielded to prevent the coating from being attached;

[0033] The large magnetic sheet 20 is disposed at one end of the coil body 10 and completely covers the coil body 10;

[0034] The small magnetic piece 30 is disposed at the center of the coil body 10 and connected to the large magnetic piece 20;

[0035] In this embodiment, the large magnetic sheet 20 and the small magnetic sheet 30 are both made of ferrite magnetic sheets, specifically, ferrite sheets of manganese zinc BP40, with a magnetic permeability of 2300; by providing two large and small magnetic sheets, it is more conducive to the gathering of magnetic lines of force, increasing the emission distance under the condition of the same thickness, and having a compact structure and reducing the heat generation;

[0036] The NTC thermistor 40 is arranged at the center of the coil body 10 and connected to the large magnetic sheet 20, and is connected to a resistor pin 41 extending outward; the resistor pin 41 has a sleeve; by providing a thermistor, the head of the NTC thermistor 40 is close to the coil, and when the coil module reaches a high temperature during use, it will be sensed by the NTC thermistor 40, and when the temperature exceeds the limit, the NTC will be damaged first, which protects other parts, and can be widely used in temperature measurement, temperature compensation, surge current suppression and overheating protection.

[0037] In this embodiment, the coil pin 11 and the resistor pin 41 extend outward in the same direction, and the portion attached to the coil body 10 is connected with a UV curing adhesive 60 to increase the connection stability. Specifically, UV-352 curing adhesive is selected, which has high temperature resistance and is suitable for use in high temperature environments.

[0038] The PET black film 50 covers both end surfaces of the large magnetic sheet 20, wherein the PET black film 50 on the side adjacent to the coil body 10 covers the coil body 10 and the NTC thermistor 40; by providing the fully covered PET black film 50, the transmitting module is fully covered and protected, further improving the insulation and sealing properties;

[0039] Furthermore, a release film 80 is connected to one end surface of the PET black film 50 facing away from the coil body 10 for protection before assembly.

[0040] The above-mentioned magnetic sheets, wires, glue, thermistors, black films and double-sided tape structures used for connection all meet automotive-grade requirements, can withstand temperatures of 120 degrees, and are suitable for use in drones.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A coated coil transmitting module, characterized in that: include: A coil body, wherein the surface of the coil body is provided with a parylene coating, and both ends of the coil body are provided with coil pins extending outward; A large magnetic sheet, which is disposed at one end of the coil body and completely covers the coil body; A small magnetic piece, which is disposed at the center of the coil body and connected to the large magnetic piece; and An NTC thermistor is arranged at the center of the coil body and connected to the large magnetic sheet, and is connected to a resistor pin extending outward.

2. A coated coil transmitting module according to claim 1, characterized in that: It also includes a PET black film; the PET black film covers the two end surfaces of the large magnetic sheet.

3. A coated coil transmitting module according to claim 2, characterized in that: The PET black film on one side adjacent to the coil body covers the coil body and the NTC thermistor.

4. A coated coil transmitting module according to claim 1, characterized in that: The position where the coil pin passes through the coil body outward is connected with UV curing glue.

5. A coated coil transmitting module according to claim 1 or 4, characterized in that: The position where the resistor pin passes through the coil body outward is connected with UV curing glue.

6. A coated coil transmitting module according to claim 1, characterized in that: The coil pin is covered with a heat shrink tube; the heat shrink tube is located at the lead-out end of the coil pin and has a connecting section.

7. A coated coil transmitting module according to claim 1, characterized in that: The large magnetic sheet and the small magnetic sheet are both made of ferrite magnetic sheets.

8. A coated coil transmitting module according to claim 2, characterized in that: A release film is connected to an end surface of the PET black film facing away from the coil body.

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