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CN-224203945-U - Coil connection structure and charging equipment

CN224203945UCN 224203945 UCN224203945 UCN 224203945UCN-224203945-U

Abstract

The embodiment of the application relates to the technical field of wireless charging, and discloses a coil connecting structure and charging equipment, wherein the coil connecting structure comprises an insulating substrate, a coil component and a connecting component, the insulating substrate comprises a first surface and a second surface which are oppositely arranged, the coil component is arranged on the insulating substrate, the coil component comprises a plurality of coil units, the coil units form continuous first circuits on the first surface, the coil units form discontinuous second circuits on the second surface, the connecting components are arranged between the coil units and used for electrically connecting the first circuits with the second circuits in series. Through the mode, the coil number and the number of strands of the coil can be increased, and the inductance value and the impedance performance are improved.

Inventors

  • WANG HEFEI

Assignees

  • 信维通信（江苏）有限公司

Dates

Publication Date
20260505
Application Date
20241231

Claims (10)

  1. 1. A coil connecting structure, characterized by comprising: An insulating substrate including a first surface and a second surface disposed opposite to each other; the coil assembly is arranged on the insulating substrate and comprises a plurality of coil units, wherein one coil unit forms a continuous first circuit on the first surface, and the other coil unit forms a discontinuous second circuit on the second surface; and the connecting component is arranged between the coil units.
  2. 2. The coil connection structure according to claim 1, wherein, The connecting assembly comprises a through hole penetrating through the insulating substrate, one end of the through hole is electrically connected with the first circuit, the other end of the through hole is electrically connected with the second circuit, and the through hole is used for forming a series circuit.
  3. 3. The coil connection structure according to claim 2, wherein, The via hole is provided with a conductive layer, and the thickness range of the conductive layer is 15-25 micrometers.
  4. 4. The coil connection structure according to claim 1, wherein, The coil assembly includes an outer ring coil unit and an inner ring coil unit, which are concentrically disposed.
  5. 5. The coil connection structure according to claim 4, wherein, The coil assembly further comprises a central coil unit arranged between the outer coil unit and the inner coil unit, and the central coil unit is used for realizing wireless charging work.
  6. 6. The coil connection structure according to claim 1, wherein, The line widths of the first line and the second line are equal and are uniformly arranged along the radial direction.
  7. 7. The coil connection structure according to claim 1, wherein, The second circuit further comprises a plurality of intermittent sections, a preset interval is arranged between every two adjacent intermittent sections, and the preset interval is used for adjusting the inductance value of the coil assembly.
  8. 8. The coil connection structure according to claim 7, wherein, The predetermined pitch increases in order along the extending direction of the second line.
  9. 9. The coil connection structure according to claim 1, wherein, The coil assembly further comprises a protective layer arranged on the first surface and the second surface, wherein the thickness of the protective layer is 2-4 microns, and the protective layer is used for providing insulation protection.
  10. 10. A charging device comprising the coil connection structure according to any one of claims 1 to 9.

Description

Coil connection structure and charging equipment Technical Field The embodiment of the application relates to the technical field of wireless charging, in particular to a coil connecting structure and charging equipment. Background In the field of wireless charging technology application, the combined integration of WPC (wireless charging alliance) standards and NFC (near field communication) technology has become an important technology development trend. In the prior art, when the combined design of the WPC charging coil and the NFC antenna is realized, the structural characteristics that the NFC antenna needs to simultaneously arrange the circuits at the innermost ring and the outermost ring enable the WPC charging coil to only adopt a front-back parallel connection mode. In the implementation process of the embodiment of the application, the inventor finds that the number of turns and the number of strands of the coil are strictly limited, so that the inductance requirement in practical application is difficult to meet, and secondly, the impedance characteristic of the coil is difficult to reach the design expected value due to the parallel structure, so that the performance of the whole charging system is influenced. Disclosure of utility model The technical problem to be solved by the embodiment of the application is to provide a coil connecting structure which can increase the number of turns and the number of strands of coils and improve the inductance and impedance performance. In order to solve the technical problems, the technical scheme adopted by the embodiment of the application is that the coil connecting structure comprises an insulating substrate, a coil assembly and a connecting assembly, wherein the insulating substrate comprises a first surface and a second surface which are oppositely arranged, the coil assembly is arranged on the insulating substrate and comprises a plurality of coil units, one coil unit forms a continuous first circuit on the first surface, the other coil unit forms a discontinuous second circuit on the second surface, the connecting assembly is arranged between the coil units, and the connecting assembly is used for electrically connecting the first circuit and the second circuit in series. Optionally, the connection assembly includes a via penetrating through the insulating substrate, one end of the via is electrically connected to the first circuit, and the other end of the via is electrically connected to the second circuit, and the via is used for forming a series circuit. Optionally, the via hole is provided with a conductive layer, and the thickness of the conductive layer ranges from 15 micrometers to 25 micrometers. Optionally, the coil assembly includes an outer ring coil unit and an inner ring coil unit, and the outer ring coil unit and the inner ring coil unit are concentrically disposed. Optionally, the coil assembly further includes a central coil unit disposed between the outer coil unit and the inner coil unit, and the intermediate coil unit is configured to implement wireless charging work. Optionally, the line widths of the first line and the second line are equal and are uniformly arranged along the radial direction. Optionally, the second circuit further includes a plurality of intermittent sections, and a predetermined interval is disposed between adjacent intermittent sections, and the predetermined interval is used for adjusting the inductance value of the coil assembly. Optionally, the predetermined intervals increase in sequence along the extending direction of the second line. Optionally, the coil assembly further includes a protective layer disposed on the first surface and the second surface, the protective layer having a thickness of 2-4 microns, the protective layer being configured to provide insulation protection. In order to solve the technical problems, another technical scheme adopted by the embodiment of the application is to provide charging equipment which comprises the coil connecting structure. The embodiment of the application provides a coil connecting structure, which comprises an insulating substrate, a coil assembly and a connecting assembly, wherein the insulating substrate comprises a first surface and a second surface which are oppositely arranged, the coil assembly is arranged on the insulating substrate, the coil assembly comprises a plurality of coil units, one coil unit forms a continuous first circuit on the first surface, the other coil unit forms a discontinuous second circuit on the second surface, the connecting assembly is arranged between the coil units, the connecting assembly is used for electrically connecting the first circuit and the second circuit in series, and the coil assembly is more flexible and efficient in space layout due to the structural design of realizing series electric connection by adopting the connecting assembly on the two sides of the insulating substrate. In addition, the design fully