High-power wireless charging transmitting terminal coil module

Abstract

The utility model relates to a high-power wireless charging transmitting terminal coil module which comprises a ferrite magnetic sheet. PET (Polyethylene Terephthalate) black films are attached to two end surfaces of the ferrite magnetic sheet; one end face, far away from the ferrite, of one PET black film is provided with at least one layer of coil; the coil is sleeved with a first binding layer, and the two ends of the coil are connected with pins. The pins extend towards the outer side direction of the ferrite magnetic sheet along the periphery of the coil; the peripheries of the pins are sleeved with sheaths; the periphery of the sheath is sleeved with a second tightening layer. According to the coil, the first binding belt and the second binding belt are arranged, the first binding belt can bind and fix multiple layers of coils in an insulating mode, the second binding belt can bind and fix a lead wire to avoid looseness, the coil is attached through structural adhesive, UV adhesive and other glue, the support is further arranged to fix the whole in the radial direction after being assembled, and therefore the whole coil can be fixed in an insulating mode. Compared with an existing connection mode that only double faced adhesive tape is adopted, the lead wire clamping protection device has the advantage of being stable in structure.

Description

Technical Field

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

[0002] The wireless charging transmitting coil is an important part of wireless charging technology. Its function and structure are based on the principle of electromagnetic induction and are used to transmit electrical energy to the receiver without physical contact. When working, the transmitting coil generates a changing magnetic field by energizing. This changing magnetic field will induce the coil in the receiver, thereby generating an induced current in the receiver to achieve power transmission. The transmitting coil includes a coil composed of a wire and a magnetic material arranged on one side of the coil. With the development of the wireless charging field and the formulation of wireless charging standards, wireless charging receiving coils are currently assembled with finished products. The existing QI specification A11 module magnetic sheet is a single coil structure with a transmission power of 5-15W and a maximum transmission distance of 10mm. Some products require a larger transmission power and distance. For this reason, customized requirements are put forward to coil manufacturers to increase the transmission power by replacing wires with larger wire diameters and volume. However, the existing coil is only fixed by double-sided tape, and the lead part is directly exposed. When a larger wire diameter is replaced and a multi-layer coil structure is adopted, the connection stability is poor. Therefore, improvement is needed. Utility Model Content

[0003] Based on this, the utility model provides a high-power wireless charging transmitter coil module to solve the above problems.

[0004] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0005] A high-power wireless charging transmitter coil module comprises: a ferrite magnetic sheet; PET black films are attached to both end surfaces of the ferrite magnetic sheet; at least one layer of coil is provided on one end surface of the PET black film away from the ferrite; a first binding layer is provided on the coil, and pins are connected to both ends of the coil; the pins extend outward from the ferrite magnetic sheet along the periphery of the coil; a sheath is provided on the periphery of the pins; and a second binding layer is provided on the periphery of the sheath.

[0006] Furthermore, a bracket is connected to the outer periphery of the ferrite magnetic sheet; a clamping seat is provided at the upper end of the bracket, and a pin is provided at the lower end; a fixing groove for placing the pin is provided on the clamping seat; the pin is inserted into the product installation groove to limit radial rotation.

[0007] Furthermore, the coil is attached to the PET black film by means of structural adhesive.

[0008] Furthermore, UV glue is connected between the coil and the PET black film to strengthen the connection.

[0009] Furthermore, the first binding layer is made of insulating tape.

[0010] Furthermore, the second binding layer is made of masking tape.

[0011] Furthermore, the sheath is a heat shrink tube.

[0012] Furthermore, the wire material of the coil is 0.10x600P solvent-based silk-covered wire.

[0013] Furthermore, the specification of the ferrite magnetic sheet is 190x2.0mm.

[0014] Furthermore, the coil is provided with two layers.

[0015] The beneficial effects of the utility model are:

[0016] 1. Stable structure. The coil of the utility model is provided with a first tightening belt and a second tightening belt. The first tightening belt can insulate and bind the multi-layer coil, and the second tightening belt can bind and fix the lead wire to prevent it from being loose. The coil is attached by various glues such as structural glue and UV glue. A bracket is also provided to radially fix the whole after assembly, and the lead wire is clamped and protected. Compared with the existing connection method that only uses double-sided tape, it has the advantage of stable structure.

[0017] 2. Improve power and transmission distance. Compared with the existing QI specification A11 module, this transmitting coil uses wire with a larger diameter and a higher number of strands, which enables it to have a higher current bearing capacity, improves the durability and stability of the coil, and provides more reliable support for high-power charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0021] Figure 4 It is a partial side structural schematic diagram of the utility model.

[0022] 10. Ferrite magnetic sheet; 20. PET black film; 30. Coil; 31. Structural adhesive; 40. First binding layer; 50. Pin; 60. Sheath; 70. Second binding layer; 80. Bracket; 81. Card holder; 82. Pin; 83. Fixing slot; 90. UV adhesive. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figure 1-Figure 4 As shown, a high-power wireless charging transmitting end coil module includes: a ferrite magnetic sheet 10, a PET black film 20, a coil 30, a first binding layer 40, a pin 50, a sheath 60, a second binding layer 70, and a bracket 80;

[0027] The ferrite magnetic sheet 10 is used as a substrate to be placed around the coil 30 to enhance the strength of the magnetic field. By guiding the magnetic flux, the ferrite can concentrate and enhance the magnetic field so that it can better penetrate the space and reach the receiving coil 30;

[0028] The PET black film 20 is attached to both end surfaces of the ferrite magnetic sheet 10, has insulation properties, provides thermal and electrical isolation, reduces thermal conduction or electrical interference, and improves overall working stability;

[0029] The coil 30 is provided with two layers, and is stacked concentrically on one end of the PET black film 20 away from the ferrite magnetic sheet 10. Pins 50 are connected to both ends of the coil 30, and the pins 50 extend outward from the ferrite magnetic sheet 10 along the periphery of the coil 30; the first binding layer 40 binds the two layers of the coil 30; the second binding layer 70 is wound around the part of the pin 50 that is led out of the ferrite magnetic sheet 10;

[0030] In this embodiment, the first binding layer 40 is made of insulating tape; the second binding layer 70 is made of masking tape; as for the fixing method of the coil 30, the coil 30 is attached to the PET black film 20 by means of structural adhesive 31. During assembly, 5 circles of SH-8536 structural adhesive 31 are applied to the PET black film 20 according to the contour of the coil 30, and the lead wires and four side points are fixed with UV352 glue; the above structure is used to fix the coil 30. Compared with the previous fixing method using only double-sided adhesive, this fixing method is more suitable for the use of high-power coil 30 modules, avoiding the loosening problem caused by the large module and heavy coil 30, and has the advantage of stable structure;

[0031] The sheath 60 is arranged on the periphery of the pin 50 through a structural rubber sleeve. In this embodiment, the sheath 60 is a heat shrink tube. The sheath 60 can provide insulation protection for the pins 50 to prevent short circuits between the pins 50. It can also prevent the pins 50 from being physically damaged, such as bending, impact or stretching, which is very important for ensuring the long-term reliability and stability of the coil 30.

[0032] The bracket 80 is connected to the outer periphery of the ferrite magnetic sheet 10; a clamping seat 81 is provided at the upper end of the bracket 80, and a pin 82 is provided at the lower end; a fixing groove 83 for placing the pin 50 is provided on the clamping seat 81; the pin 82 is inserted into the product installation groove to limit radial rotation; by providing the bracket 80, the assembly stability with the product can be increased, the pin 50 will be bent when the coil 30 is led out, even if it is fixed by UV glue 90, the pin 50 will be pulled and damaged during the subsequent assembly process, and the bracket 80 is provided with a fixing groove 83, which can fix the protruding part of the pin 50 to avoid damage;

[0033] The QI specification A11 module magnetic sheet adopts 50*1.0mm, and the module thickness is within 2.8mm. The ferrite magnetic sheet 10 in this embodiment adopts a large magnetic sheet of 190*2.0mm, and the module thickness is within 6.8mm; the conventional QI specification A11 adopts Litz0.08*10 strands of silk-wrapped wire, the outer diameter of the wire is about 1.15mm, and the wire itself withstands a current of about 4.1A. The coil 30 in this embodiment adopts Litz0.10*600 strands of solvent-based silk-wrapped wire, the outer diameter of the wire is about 3.3mm, and the wire itself withstands a current of 33A. The overall module is larger than the QI specification A11 type. Compared with the QI specification A11 module with a transmission power of 5-15W and a maximum transmission distance of 10mm, the transmission power of the transmitting end coil 30 module reaches more than 100W, and the maximum transmission distance is 20mm, which greatly improves the power.

[0034] 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.

[0035] 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 high-power wireless charging transmitter coil module, characterized in that: include: A ferrite magnetic sheet; PET black films are attached to both end surfaces of the ferrite magnetic sheet; at least one layer of coil is provided on one end surface of the PET black film away from the ferrite; a first binding layer is provided on the coil, and pins are connected to both ends of the coil; the pins extend outward from the ferrite magnetic sheet along the periphery of the coil; a sheath is provided on the periphery of the pins; a second binding layer is provided on the periphery of the sheath.

2. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The outer periphery of the ferrite magnetic sheet is connected with a bracket; a clamping seat is provided at the upper end of the bracket, and a plug pin is provided at the lower end; a fixing groove for placing the pin is provided on the clamping seat; the plug pin is inserted into the product installation groove to limit radial rotation.

3. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The coil is attached to the PET black film by structural adhesive.

4. A high-power wireless charging transmitter coil module according to claim 3, characterized in that: UV glue is also connected between the coil and the PET black film to strengthen the connection.

5. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The first binding layer is made of insulating tape.

6. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The second binding layer is made of masking tape.

7. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The sheath adopts a heat shrink tube.

8. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The wire material of the coil is 0.10x600P solvent-based silk-covered wire.

9. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The specification of the ferrite magnetic sheet is 190x2.0mm.

10. A high-power wireless charging transmitter coil module according to claim 1, characterized in that: The coil is provided with two layers.

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