WO2022052182A1 - 线圈和无线充电设备 - Google Patents

线圈和无线充电设备 Download PDF

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Publication number
WO2022052182A1
WO2022052182A1 PCT/CN2020/117755 CN2020117755W WO2022052182A1 WO 2022052182 A1 WO2022052182 A1 WO 2022052182A1 CN 2020117755 W CN2020117755 W CN 2020117755W WO 2022052182 A1 WO2022052182 A1 WO 2022052182A1
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WO
WIPO (PCT)
Prior art keywords
coil
turn
winding
plane
planar winding
Prior art date
Application number
PCT/CN2020/117755
Other languages
English (en)
French (fr)
Inventor
王红军
蒋革
刘毛
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技（南京）有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技（南京）有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022052182A1 publication Critical patent/WO2022052182A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • H01F2027/2809—Printed windings on stacked layers

Definitions

  • the present application relates to the technical field of wireless charging, and in particular, to a coil using wireless charging and a wireless charging device.
  • wireless chargers are one of the most important wireless charging products.
  • the wireless charger of the related art adopts the principle of electromagnetic induction, realizes the transmission of energy through energy coupling through the coil, and does not have the characteristics of connecting with the traditional charging power cord. Therefore, it is increasingly favored by manufacturers of mobile phones, tablet computers, and smart watches.
  • the coil part for energy transmission of the wireless charger of the related art has the risk of reducing the transmission efficiency and increasing the heat generation due to the loss of resistance of the coil during wireless charging. Therefore, how to improve the coil performance is a very important technical issue for wireless charging. Among them, the transmission efficiency of the coil at the receiving end used to receive wireless charging plays an important role.
  • the purpose of the present application is to provide a coil and a wireless charging device with high transmission efficiency.
  • a coil comprising a first wire end, a second wire end, and a winding set connecting the first wire end to the second wire end, the winding set at least comprising a stacked a first planar winding and a second planar winding;
  • the first plane winding includes an outer peripheral portion and an inner peripheral portion adjacent to each other from the outside to the inside; the outer peripheral portion of the first plane winding includes at least one turn of an outer coil, and the outer coil of the first plane winding is provided with an edge coil.
  • a slot extending in the extension direction, and includes four first coil portions separated by the slot;
  • the inner peripheral portion of the first plane winding at least includes an inner coil of one turn, and the inner coil of the first plane winding is provided with a slot extending along the extending direction of the coil, and comprising a first outer ring portion and a first inner ring portion separated by the slot;
  • the second plane winding includes adjacent outer and inner peripheral portions from the outside to the inside; the outer peripheral portion of the second plane winding includes at least one turn of the outer coil, and the outer coil of the second plane winding is provided with an edge along the coil. a slot extending in the extending direction, and includes four second coil portions separated by the slot; the inner peripheral portion of the second plane winding at least includes an inner coil of one turn, and the inner coil of the second plane winding is provided with a slot extending along the extending direction of the coil, and comprising a second outer ring portion and a second inner ring portion separated by the slot;
  • the first ring portion and the second ring portion are stacked oppositely, the first outer ring portion and the second outer ring portion are stacked oppositely, and the first inner ring portion and the second inner ring
  • the outer coils of the first plane winding are connected in series with the inner coils of the first plane windings, the inner coils of the first plane windings are connected in parallel with the inner coils of the second plane windings, and the second plane windings are connected in parallel.
  • the inner coil of the two planar winding is connected in series with the outer coil of the second planar winding.
  • the outer coil of the first planar winding includes the innermost first turn outer coil in the outer peripheral portion, and the inner coil of the first planar winding includes the outermost first turn in the inner peripheral portion.
  • An inner-turn coil, the head end of the first inner-turn coil of the first planar winding is opposite to a part of the tail end of the first-turn outer coil and is connected through a connection part.
  • the inner coils of the first planar winding and the second planar winding further include an inner coil of the nth turn located at the innermost inner side of the inner peripheral portion,
  • the outer coil of the second planar winding includes the innermost first-turn outer coil in the outer peripheral portion
  • the inner coil of the second planar winding includes the outermost first-turn inner coil in the inner peripheral portion
  • the second planar winding The head end of the inner coil of the first turn is arranged adjacent to the head end of the outer coil of the first turn, and the tail end of the inner coil of the nth turn of the second plane winding and the head end of the outer coil of the first turn pass through the outlet.
  • the line segments are connected, and the outgoing line segments extend along the radial direction of the inner peripheral portion of the second planar winding.
  • the inner coil of the first planar winding further includes a second inner coil adjacent to the first inner coil from the outside to the inside, and the tail end of the first inner coil of the first planar winding Opposite to the head end of the coil in the second turn and connected through the connection part;
  • the inner coil of the second planar winding further includes a second inner coil adjacent to the first inner coil from the outside to the inside, and the tail end of the first inner coil of the second planar winding is connected to the second inner coil.
  • the head ends of the coils within a turn are opposite and connected by a connecting portion.
  • the outer coil of the first planar winding further includes a second outer coil adjacent to the first outer coil from the inside to the outside, and a part of the first outer coil of the first planar winding is the second outer coil.
  • the tail end of the first turn part is opposite to the tail end of the first turn part of the part of the second turn outer coil
  • the head end of the first turn part of the first turn outer coil is opposite to the tail end of the first turn part of the second turn outer coil connected by a jumper
  • the outer coil of the first planar winding further includes an m-th turn outer coil located at the outermost outer peripheral portion, and the head end of the first turn portion of the m-th turn outer coil is connected to the first wire end.
  • the outer coil of the second planar winding further includes a second outer coil adjacent to the first outer coil from the inside to the outside, and the part of the first outer coil of the second planar winding is the first
  • the tail end of the first turn portion is opposite to the head end of the first turn portion of the second turn outer coil portion, and the tail end of the first turn portion of the first turn outer coil portion is opposite to the head end of the first turn portion of the second turn outer coil portion. connected by a jumper;
  • the outer coil of the first planar winding further includes an m-th turn outer coil located at the outermost outer peripheral portion, and the tail end of the first turn portion of the m-th turn outer coil is connected to the second wire end.
  • the inner coil of at least one turn of the first planar winding includes at least one intersecting portion, and in the intersecting portion of the first planar winding, the first inner coil portion is provided with a leave-off portion, and the first The bent part of the outer ring part passes through the abdication part, the inner coil of the first plane winding is at the left and right ends of the cross part, and the first outer ring part and the first inner ring part are replaced from outside to inside arrangement order.
  • the inner coil of at least one turn of the second planar winding includes at least one intersecting portion, and in the intersecting portion of the second planar winding, the first outer ring portion is provided with a leaving portion, the first The bent part of the inner ring part passes through the vacant part, the inner coil of the first plane winding is at the left and right ends of the cross part, and the first outer ring part and the first inner ring part are replaced from outside to inside arrangement order.
  • intersections of the first planar windings and the intersections of the second planar windings are disposed opposite to each other, and the bent portions in the intersections of the first planar windings and the intersections of the second planar windings The bent part of the cross is set.
  • the present application also provides a wireless charging device including the coil described in any one of the above.
  • the beneficial effects of the present application are: to provide a coil and a wire charging device, the outer circumference of the coil is four-strand parallel with the multi-turn outer coils stacked in the first plane winding and the second plane winding (the first coil portion or the first coil portion or the second plane coil). Two coils) are wound, and the inner peripheral part is paralleled by two strands of multi-turn inner coils stacked in the first plane winding and the second plane winding (the first inner circle part and the first outer circle part or the second inner circle part and The second outer ring part) is wound so that the outer coil makes full use of the peripheral space, the current distribution of the inner coil and the outer coil is more uniform, the magnetic field distribution is more uniform, and the AC resistance of the induction coil is smaller.
  • FIG. 1 is a schematic three-dimensional structure diagram of a coil according to an embodiment of the present application.
  • FIG. 2 is an exploded schematic diagram of a partial three-dimensional structure of a coil according to an embodiment of the present application
  • Fig. 3 is an enlarged view of part B in Fig. 2;
  • Fig. 4 is an enlarged view of part B' in Fig. 2;
  • Fig. 5 is an enlarged view of part C in Fig. 2;
  • Fig. 6 is the enlarged view of C' part among Fig. 2;
  • Fig. 7 is an enlarged view of part A in Fig. 1;
  • coil 100 first wire end 1; second wire end 2; winding group 3; first planar winding T3; first turn outer coil To31; second turn outer coil To32; mth outer coil To3m;
  • an embodiment of the present application provides a coil 100 .
  • the coil 100 includes a first wire end 1 , a second wire end 2 , and a winding 3 connecting the first wire end 1 to the second wire end 2 .
  • the first wire end 1 is the input port of the coil 100 .
  • the second wire end 2 is the output port of the coil 100 .
  • first wire end 1 and the second wire end 2 can be interchanged, that is, the first wire end 1 is the output port of the coil 100 ; the second wire end 2 is the input port of the coil 100 Ports are also available.
  • the winding set 3 includes a first plane winding T3 and a second plane winding B3 that are stacked, and both the first plane winding T3 and the second plane winding B3 are concentric in a clockwise or counterclockwise direction Made of spiral wrap. It should be noted that the present application does not limit the coil to include two-layer planar windings, and the coils can be adjusted to multi-layer planar windings as required.
  • the first planar winding T3 includes the m-th outer coil To3m, ..., the second-turn outer coil To32, the first-turn outer coil To31, the first-turn inner coil Ti31, Two-turn inner coil Ti32,..., n-th inner coil Ti3n.
  • the m-th outer coil To3m,..., the second-turn outer coil To32, and the first-turn outer coil To31 are connected end to end to form the outer periphery of the first planar winding T3 in series;
  • the coil Ti31, the inner coil Ti32 of the second turn, ..., the inner coil Ti3n of the nth turn are connected end to end to form the inner circumference of the first planar winding T3 in series;
  • the tail end of the outer coil To31 of the first turn is connected to the inner coil Ti31 of the first turn.
  • the head ends are connected so that the outer peripheral portion and the inner peripheral portion are connected in series.
  • the outer periphery of the first planar winding T3 has three turns of the outer coil connected in series, and the inner periphery has five turns of the inner coil connected in series.
  • the outer coil of each turn of the outer peripheral portion is provided with three spaced slots 5 extending along the extending direction of the coil, and each turn
  • the outer coil includes four spaced first coil portions c1 separated by three slots 5 . Parts of the first coil portions c1 of two adjacent turns of outer coils are opposite end to end, and each of the first coil portions c1 of two adjacent turns of outer coils is opposite.
  • the head and tail are connected by the jumper 6 .
  • the tail ends of the two first turns of the outer coil To32 of the second turn are opposite to the head ends of the two first turns of the outer coil To31 of the first turn, and the four first turns of the outer coil To32 of the second turn
  • the tail ends of the loop portions are connected with the head ends of the four first loop portions of the first turn outer coil To31 through the jumper 6 .
  • the inner coils of each turn on the inner circumference are provided with a slot 5 extending along the extending direction of the coil, and the outer coil of each turn includes a first outer loop portion a1 and a first inner loop portion b1 separated by the slot 5.
  • the head ends of the first outer ring part a1 and the first inner ring part b1 are connected by a jumper to form the head ends of the inner coils of each turn, and the first outer ring part a1 and the first inner ring part b1 of the
  • the tail ends are also connected by jumper parts to form the tail ends of the inner coils of each turn, and the inner coils of two adjacent turns face each other end to end and are connected through the connecting part 8 .
  • first outer ring part of the second turn outer coil To32 and the head end of the first inner ring part are connected by a jumper to form the head end of the second turn outer coil To32, and the first outer ring part of the first turn outer coil To31
  • the tail end of the first turn outer coil To31 is formed by connecting with the tail end of the first inner ring part through the jumper part, and the tail end of the first turn outer coil To31 is opposite to the head end of the second turn outer coil To32 and passes through the connecting part. 8 connections.
  • the head ends of the four first turn portions of the outermost m-th turn outer coil of the outer ring portion are connected to the first wire end 1 after being connected through the jumper portion 6 .
  • connection between the inner circumference and the outer circumference is that the tail ends of two of the first turns of the first turn of the outer coil To31 are opposite to the head ends of the first turn of the inner coil To31, and two of the first turns of the outer coil To31 of the first turn are opposite.
  • the tail end of one turn is connected with the head end of the coil Ti31 in the first turn after being connected by the jumper 6 .
  • the second planar winding B3 includes the m-th outer coil Bo3m, ..., the second outer coil Bo32, the first outer coil Bo31, the first inner coil Bi31, the second inner inner coil Bi31, Coils Bi32,..., n-th inner coil Bi3n.
  • the mth turn outer coil Bo3m,..., the second turn outer coil Bo32, and the first turn outer coil Bo31 are connected end to end to form the outer periphery of the first planar winding B3 in series; from outside to inside, the first turn The coil Bi31, the inner coil Bi32 of the second turn, ..., the inner coil Bi3n of the nth turn are connected end to end to form the inner circumference of the first planar winding B3 in series; the tail end of the outer coil Bo31 of the first turn is connected to the inner coil Bi31 of the first turn
  • the head ends are connected so that the outer peripheral portion and the inner peripheral portion are connected in series.
  • the outer periphery of the second planar winding B3 has three turns of the outer coil connected in series, and the inner periphery has five turns of the inner coil connected in series.
  • the outer coils of each turn of the outer peripheral portion are provided with three spaced slots 5 extending along the extending direction of the coil.
  • the outer coil includes four spaced first coil portions c1 separated by three slots 5 . Parts of the first coil portions c1 of two adjacent turns of outer coils are opposite end to end, and each of the first coil portions c1 of two adjacent turns of outer coils is opposite.
  • the head and tail are connected by the jumper 6 .
  • the head ends of the two first turns of the outer coil Bo32 of the second turn are opposite to the tail ends of the two first turns of the outer coil Bo31 of the first turn, and the four first turns of the outer coil Bo32 of the second turn are opposite to each other.
  • the head end of the loop portion is connected with the tail ends of the four first loop portions of the first turn outer coil Bo31 through the jumper 6 .
  • the inner coils of each turn on the inner circumference are provided with a slot 5 extending along the extending direction of the coil, and the outer coil of each turn includes a first outer loop portion a1 and a first inner loop portion b1 separated by the slot 5.
  • the head ends of the first outer ring part a1 and the first inner ring part b1 are connected by a jumper to form the head ends of the inner coils of each turn, and the first outer ring part a1 and the first inner ring part b1 of the
  • the tail ends are also connected by jumper parts to form the tail ends of the inner coils of each turn, and the inner coils of two adjacent turns face each other end to end and are connected through the connecting part 8 .
  • first outer ring part of the second turn outer coil Bo32 and the head end of the first inner ring part are connected by a jumper to form the head end of the second turn outer coil Bo32, and the first outer ring part of the first turn outer coil Bo31
  • the tail end of the first turn outer coil Bo31 is formed by connecting with the tail end of the first inner ring part through the jumper part, and the tail end of the first turn outer coil Bo31 is opposite to the head end of the second turn outer coil Bo32 and passes through the connecting part. 8 connections.
  • the tail ends of the four first turn portions of the outermost m-th turn outer coil of the outer ring portion are connected through the jumper portion 6 and then connected to the second wire end 2 .
  • the connection between the inner peripheral portion and the outer peripheral portion is that the head ends of the four first-turn portions of the first-turn outer coil Bo31 are arranged adjacent to the head ends of the first-turn inner coil Bo31, and the four first-turn outer coil Bo31 heads are arranged adjacent to each other.
  • the head end of the first coil is connected by the jumper 6 and the tail end of the inner coil Bi3n of the nth turn is connected through the outlet segment 4, and the inner coil of the second plane winding B3 is provided with a part 7 to give way.
  • the part 7 extends along the radial direction of the inner peripheral part of the second plane winding B3, and the outgoing wire segment 4 passes through the leaving part 7 to connect the head end of the outer coil Bo31 of the first turn and the tail end of the inner coil Bo3n of the nth turn.
  • the inner peripheries of the first planar winding T3 and the second planar winding B3 are stacked relative to each other, and the outer peripheries of the first planar winding T3 and the second planar winding B3 are stacked relative to each other.
  • the first coil portion c1 of the outer coil of each turn of the first planar winding T3 and the second coil portion c2 of the outer coil of each turn of the second planar winding B3 are stacked opposite each other, and the first outer coil of each turn of the first planar winding T3
  • the loop portion a1 and the second outer loop portion a2 of the coils in each turn of the second planar winding B3 are stacked opposite each other, and the first inner loop portion b1 and the second planar winding B3 of the coils in each turn of the first planar winding T3
  • the second inner ring portions b2 of the inner coils of each turn are stacked relative to each other.
  • the outer coil of the inner circumference of the first plane winding T3 is connected in series with the inner coil of the inner circumference of the first plane winding T3, and the inner coil of each turn of the inner circumference of the first plane winding T3 is connected to the second plane winding T3.
  • the inner coils of each turn at the inner circumference of the planar winding B3 are connected in parallel, and the inner coils at the inner circumference of the second planar winding B3 are connected in series with the outer coils at the outer circumference of the second planar winding B3.
  • the outer circumference of the first planar winding T3 is connected in series with the m-th outer coil To3m, .
  • the coil Ti31, the second inner coil Ti32, ..., the nth inner coil Ti3n are connected in series in sequence; the first inner coil Ti31 of the inner circumference of the first plane winding T3 and the first inner coil of the second plane winding B3 Bi31 is connected in parallel, the coil Ti32 in the second turn is connected in parallel with the coil Bi32 in the second turn of the second planar winding B3, ..., the coil Ti3n in the nth turn is connected in parallel with the coil Bi3n in the nth turn of the second planar winding B3; the second The outer circumference of the planar winding B3 is connected in series with the first-turn inner coil Bi31, the second-turn outer coil Bo31, the second-turn outer coil Bo32, and the first-turn outer coil Bo31 from the outside to the inner.
  • the in-turn coils Bi32, ... and the n-th in-turn coil Bi3n are connected in series in sequence.
  • the inner coils in each turn of the inner circumference of the first planar winding T3 and the inner coils of each turn of the inner circumference of the second planar winding B3 are connected in parallel through metallized vias 9 .
  • the inner coil of at least one turn of the first planar winding T3 includes at least one intersecting portion M.
  • each inner coil of the inner peripheral portion of the first planar winding T3 is provided with three spaced intersecting portions M.
  • the inner coil of at least one turn of the second planar winding B3 includes at least one intersection M.
  • each inner coil of the inner circumference of the first planar winding B3 is provided with three spaced intersections M.
  • the first outer ring part a1 and the first inner ring part b1 of the inner coil of the turn will be replaced once from the outside to the inside in the extension direction of the coil. cloth order.
  • the intersecting portion M of the first planar winding T3 and the intersecting portion M of the second planar winding B3 are stacked opposite to each other.
  • the first inner ring portion b1 of the first planar winding T3 is provided with a vacant portion 7, and the bending portion n of the first outer ring portion a1 passes through the vacant portion 7.
  • the first outer ring portion a1 of the second planar winding B3 is provided with an escape portion 7, and the bent portion N of the first inner ring portion a1 passes through all the intersections M. Refer to the vacant part 7.
  • the bent portion N in the first planar winding T3 and the bent portion in the second planar winding B3 N is arranged crosswise, and via holes 9 are provided on both sides of the bending portion N and the two sides of the abdication portion 7 in the outer and inner ring portions of the inner coils of each turn, and the metallized vias 9 are used to realize the first Parallel connection of coils within each turn of the planar winding T3 and the second planar winding B3.
  • the coil of the embodiment of the present application from the outside to the inside, the outer circumference is wound in parallel with four strands of the three-turn outer coil stacked in the first planar winding T3 and the second planar winding B3 (the first coil portion c1 or the second coil portion c2 ) It is assumed that the inner peripheral part is paralleled by two strands of five-turn inner coils stacked in the first plane winding T3 and the second plane winding B3 (the first inner circle part b1 and the first outer circle part a1 or the second inner circle part b2 and the second inner circle part b2 and The second outer ring part a2) is wound so that the outer coil can make full use of the peripheral space, the current distribution of the inner coil and the outer coil is more uniform, the magnetic field distribution is more uniform, and the AC resistance of the induction coil is smaller.
  • the simulation experiment of the embodiment of the present application shows that the winding group 3 composed of 4 strands and 11 turns has an inner diameter of 20 mm, an outer diameter of 48 mm, the wire spacing yield is controlled at the mass production level, and the copper thickness is 2Oz. It is about 5uH, and the AC resistance of the inductance is less than 185mohm. It can be seen that the inductance and resistance of the coil 100 are smaller and lower than those of the coil with the existing structure, which shows that the transmission efficiency of the coil 100 of the present application is high.
  • the present application also provides a wireless charging device including the coil 100 .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

一种线圈（100）和线充电设备，所述线圈（100）的外周部以第一平面绕组（T3）和第二平面绕组（B3）中叠设的多匝外线圈四股并行绕设，内周部以第一平面绕组（T3）和第二平面绕组（B3）中叠设的多匝内线圈两股并行绕设，使得外线圈充分利用外围空间，内线圈和外线圈的电流分布更均匀，磁场分布更均匀，感应线圈的交流电阻更小。

Description

线圈和无线充电设备 技术领域
本申请涉及无线充电技术领域，尤其涉及一种运用无线充电的线圈和无线充电设备。
 背景技术
随着智能设备的应用不断发展。而在众多智能设备之中，具有无线充电功能的智能设备为其中最为引人注目的产品。目前，无线充电器为其中重要的无线充电产品设备。
相关技术的无线充电器采用电磁感应原理，通过线圈进行能量耦合实现能量的传递，不用传统的充电电源线连接的特点。因而越来越受到手机、平板电脑、智能手表等厂家青睐。
然而，相关技术的无线充电器的能量传输用的线圈部分，由于线圈在无线充电时有电阻的损耗，造成降低传输效率的风险，并增加发热量。因而如何提高线圈性能是无线充电很重要的一个技术问题。其中,用于接收无线充电的接收端的线圈的传输效率的高低具有重要的作用。
因此，有必要提供一种新的线圈和设备解决上述技术问题。
 技术问题
本申请的目的在于提供一种传输效率高的线圈和无线充电设备。
 技术解决方案
本申请的技术方案如下：一种线圈，其包括第一线端、第二线端以及将所述第一线端连接至所述第二线端的绕线组，所述绕线组至少包括叠设的第一平面绕组和第二平面绕组；
所述第一平面绕组由外至内包括相邻的外周部和内周部；所述第一平面绕组的外周部包括至少一匝外线圈，所述第一平面绕组的外线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的四股第一圈部；所述第一平面绕组的内周部至少包括一匝内线圈，所述第一平面绕组的内线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的第一外圈部和第一内圈部；
所述第二平面绕组由外至内包括相邻的外周部和内周部；所述第二平面绕组的外周部包括至少一匝外线圈，所述第二平面绕组的外线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的四股第二圈部；所述第二平面绕组的内周部至少包括一匝内线圈，所述第二平面绕组的内线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的第二外圈部和第二内圈部；
所述第一圈部与所述第二圈部相对叠设，所述第一外圈部和所述第二外圈部相对叠设，所述第一内圈部和所述第二内圈部相对叠设；所述第一平面绕组的外线圈与所述第一平面绕组的内线圈串联，所述第一平面绕组的内线圈与所述第二平面绕组的内线圈并联，所述第二平面绕组的内线圈与所述第二平面绕组的外线圈串联。
优选的，在线圈的延伸方向上，所述第一平面绕组的外线圈包括外周部中最内侧的第一匝外线圈，所述第一平面绕组的内线圈包括内周部最外侧的第一匝内线圈，所述第一平面绕组的第一匝内线圈的首端与第一匝外线圈的部分尾端相对且通过连接部相连。
优选的，在线圈的延伸方向上，所述第一平面绕组和所述第二平面绕组的内线圈还包括位于内周部最内侧的第n匝内线圈，
所述第二平面绕组的外线圈包括外周部中最内侧的第一匝外线圈，所述第二平面绕组的内线圈包括内周部最外侧的第一匝内线圈，所述第二平面绕组的第一匝内线圈的首端与第一匝外线圈的首端相邻设置，所述第二平面绕组的第n匝内线圈的尾端与所述第一匝外线圈的首端通过出线段相连，所述出线段沿所述第二平面绕组的内周部的径向延伸。
优选的，所述第一平面绕组的内线圈还包括由外至内与所述第一匝内线圈相邻的第二匝内线圈，所述第一平面绕组的第一匝内线圈的尾端与第二匝内线圈的首端相对且通过连接部相连；
所述第二平面绕组的内线圈还包括由外至内与所述第一匝内线圈相邻的第二匝内线圈，所述第二平面绕组的第一匝内线圈的尾端与第二匝内线圈的首端相对且通过连接部相连。
优选的，所述第一平面绕组的外线圈由内至外还包括与所述第一匝外线圈相邻的第二匝外线圈，所述第一平面绕组的第一匝外线圈的部分第一圈部的尾端与第二匝外线圈的部分第一圈部的尾端相对，第一匝外线圈的第一圈部的首端与第二匝外线圈的第一圈部的尾端通过跨接部相连；
所述第一平面绕组的外线圈还包括位于外周部最外侧的第m匝外线圈，所述第m匝外线圈的第一圈部的首端与所述第一线端相连。
优选的，所述第二平面绕组的外线圈由内至外还包括与所述第一匝外线圈相邻的第二匝外线圈，所述第二平面绕组的第一匝外线圈的部分第一圈部的尾端与第二匝外线圈的部分第一圈部的首端相对，第一匝外线圈的第一圈部的尾端与第二匝外线圈的第一圈部的首端通过跨接部相连；
所述第一平面绕组的外线圈还包括位于外周部最外侧的第m匝外线圈，所述第m匝外线圈的第一圈部的尾端与所述第二线端相连。
优选的，所述第一平面绕组的至少一匝内线圈包括至少一个交叉部，在所述第一平面绕组的交叉部中，所述第一内圈部开设有让位部，所述第一外圈部的弯折部穿过所述让位部，所述第一平面绕组的内线圈在所述交叉部的左右两端，更换第一外圈部和第一内圈部由外至内的排布顺序。
优选的，所述第二平面绕组的至少一匝内线圈包括至少一个交叉部，在所述第二平面绕组的交叉部中，所述第一外圈部开设有让位部，所述第一内圈部的弯折部穿过所述让位部，所述第一平面绕组的内线圈在所述交叉部的左右两端，更换第一外圈部和第一内圈部由外至内的排布顺序。
优选的，所述第一平面绕组的交叉部与所述第二平面绕组的交叉部相对叠设，且所述第一平面绕组交叉部中的弯折部与所述第二平面绕组交叉部中的弯折部交叉设置。
本申请还提供了一种无线充电设备，该设备包括如上任意一项所述的线圈。
 有益效果
本申请的有益效果在于：提供了一种线圈和线充电设备，所述线圈的外周部以第一平面绕组和第二平面绕组中叠设的多匝外线圈四股并行（第一圈部或第二圈部）绕设，内周部以第一平面绕组和第二平面绕组中叠设的多匝内线圈两股并行（第一内圈部和第一外圈部或者第二内圈部和第二外圈部）绕设，使得外线圈充分利用外围空间，内线圈和外线圈的电流分布更均匀，磁场分布更均匀，感应线圈的交流电阻更小。
 附图说明
图1为本申请实施例线圈的立体结构示意图；
图2为本申请实施例线圈的部分立体结构分解示意图；
图3为图2中B部分的放大图；
图4为图2中B’部分的放大图；
图5为图2中C部分的放大图；
图6为图2中C’部分的放大图；
图7为图1中A部分的放大图；
附图说明：线圈100；第一线端1；第二线端2；绕线组3；第一平面绕组T3；第一匝外线圈To31；第二匝外线圈To32；第m匝外线圈To3m；第一匝内线圈Ti31；第二内外线圈Ti32；第n匝内线圈Ti3n；第一圈部c1；第一外圈部a1；第一内圈部b1；第二平面绕组B3；第一匝外线圈Bo31；第二匝外线圈Bo32；第m匝外线圈Bo3m；第一匝内线圈Bi31；第二内外线圈Bi32；第n匝内线圈Bi3n；第二圈部c2；第二内圈部a2；第二内圈部c2；出线段4；切槽5；跨接部6；让位部7；连接部8；过孔9；交叉部M；弯折部N。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
请参阅图1-7，本申请实施例提供了一种线圈100。
所述线圈100包括第一线端1、第二线端2以及将所述第一线端1连接至所述第二线端2的绕线组3。
本实施方式中，所述第一线端1为所述线圈100的输入端口。
所述第二线端2为所述线圈100的输出端口。当然，所述第一线端1和所述第二线端2可以互换，即所述第一线端1为所述线圈100的输出端口；所述第二线端2为所述线圈100的输入端口也是可以的。
在本实施方式中，所述绕线组3包括叠设的第一平面绕组T3和第二平面绕组B3，所述第一平面绕组T3和第二平面绕组B3均沿顺时针或逆时针方向同心螺旋环绕制成。需要说明的是，本申请并不限定线圈包括两层平面绕组，根据需要，线圈可调整为多层平面绕组。
所述第一平面绕组T3包括依次由外至内且相互间隔设置的第m匝外线圈To3m、……、第2匝外线圈To32、第一匝外线圈To31、第一匝内线圈Ti31、第二匝内线圈Ti32、……、第n匝内线圈Ti3n。由外至内第m匝外线圈To3m、……、第2匝外线圈To32、第一匝外线圈To31首尾相连形成串联的第一平面绕组T3的外周部；由外至内，第一匝内线圈Ti31、第二匝内线圈Ti32、……、第n匝内线圈Ti3n首尾相连形成串联的第一平面绕组T3的内周部；第一匝外线圈To31的尾端与第一匝内线圈Ti31的首端相连以使外周部与内周部串联。在本申请实施例中，第一平面绕组T3的外周部有3匝串联的外线圈，内周部有五匝串联的内线圈。
其中，请参阅图3和图5，在第一平面绕组T3中线圈的延伸方向上，外周部的各匝外线圈均设有沿线圈延伸方向延伸的三个间隔设置的切槽5，各匝外线圈包括被三个切槽5分隔的四个间隔的第一圈部c1，相邻两匝外线圈的部分第一圈部c1首尾相对，相邻两匝外线圈的各第一圈部c1首尾通过跨接部6相连。例如第二匝外线圈To32的其中两个第一圈部的尾端与第一匝外线圈To31的其中两个第一圈部的首端相对，且第二匝外线圈To32的四个第一圈部的尾端与第一匝外线圈To31的四个第一圈部的首端通过跨接部6相连。内周部的各匝内线圈均设有沿线圈延伸方向延伸的切槽5，各匝外线圈包括被切槽5分隔的第一外圈部a1和第一内圈部b1，各匝内线圈的第一外圈部a1和第一内圈部b1的首端通过跨接部连接形成各匝内线圈的首端，各匝内线圈的第一外圈部a1和第一内圈部b1的尾端也通过跨接部连接形成各匝内线圈的尾端，相邻两匝内线圈首尾相对且通过连接部8相连。例如第二匝外线圈To32的第一外圈部和第一内圈部的首端通过跨接部连接形成第二匝外线圈To32的首端，第一匝外线圈To31的第一外圈部和第一内圈部的尾端通过跨接部连接后形成第一匝外线圈To31的尾端，第一匝外线圈To31的尾端与第二匝外线圈To32的首端相对并通过连接部8连接。外圈部的最外侧的第m匝外线圈四个第一圈部的首端通过跨接部6连接后与第一线端1相连。内周部和外周部的连接为，第一匝外线圈To31的其中两个第一圈部的尾端与第一匝内线圈To31的首端相对，第一匝外线圈To31的其中两个第一圈部的尾端通过跨接部6连接后与第一匝内线圈Ti31的首端相连。
第二平面绕组B3包括依次由外至内且相互间隔设置的第m匝外线圈Bo3m、……、第二匝外线圈Bo32、第一匝外线圈Bo31、第一匝内线圈Bi31、第二内外线圈Bi32、……、第n匝内线圈Bi3n。由外至内第m匝外线圈Bo3m、……、第2匝外线圈Bo32、第一匝外线圈Bo31首尾相连形成串联的第一平面绕组B3的外周部；由外至内，第一匝内线圈Bi31、第二匝内线圈Bi32、……、第n匝内线圈Bi3n首尾相连形成串联的第一平面绕组B3的内周部；第一匝外线圈Bo31的尾端与第一匝内线圈Bi31的首端相连以使外周部与内周部串联。在本申请实施例中，第二平面绕组B3的外周部有3匝串联的外线圈，内周部有五匝串联的内线圈。
其中，请参阅图4和图6，在第二平面绕组B3中线圈的延伸方向上，外周部的各匝外线圈均设有沿线圈延伸方向延伸的三个间隔设置的切槽5，各匝外线圈包括被三个切槽5分隔的四个间隔的第一圈部c1，相邻两匝外线圈的部分第一圈部c1首尾相对，相邻两匝外线圈的各第一圈部c1首尾通过跨接部6相连。例如第二匝外线圈Bo32的其中两个第一圈部的首端与第一匝外线圈Bo31的其中两个第一圈部的尾端相对，且第二匝外线圈Bo32的四个第一圈部的首端与第一匝外线圈Bo31的四个第一圈部的尾端通过跨接部6相连。内周部的各匝内线圈均设有沿线圈延伸方向延伸的切槽5，各匝外线圈包括被切槽5分隔的第一外圈部a1和第一内圈部b1，各匝内线圈的第一外圈部a1和第一内圈部b1的首端通过跨接部连接形成各匝内线圈的首端，各匝内线圈的第一外圈部a1和第一内圈部b1的尾端也通过跨接部连接形成各匝内线圈的尾端，相邻两匝内线圈首尾相对且通过连接部8相连。例如第二匝外线圈Bo32的第一外圈部和第一内圈部的首端通过跨接部连接形成第二匝外线圈Bo32的首端，第一匝外线圈Bo31的第一外圈部和第一内圈部的尾端通过跨接部连接后形成第一匝外线圈Bo31的尾端，第一匝外线圈Bo31的尾端与第二匝外线圈Bo32的首端相对并通过连接部8连接。外圈部的最外侧的第m匝外线圈四个第一圈部的尾端通过跨接部6连接后与第二线端2相连。内周部和外周部的连接为，第一匝外线圈Bo31的其中四个第一圈部的首端与第一匝内线圈Bo31的首端相邻设置，第一匝外线圈Bo31的四个第一圈部的首端通过跨接部6连接后与第n匝内线圈Bi3n的尾端通过出线段4相连，所述第二平面绕组B3的内线圈上开设有让位部7，让位部7沿所述第二平面绕组B3的内周部的径向延伸，出线段4穿过让位部7处连接第一匝外线圈Bo31的首端和第n匝内线圈Bo3n的尾端。
其中，请参阅图1-图6，第一平面绕组T3和第二平面绕组B3的内周部相对叠设，第一平面绕组T3和第二平面绕组B3的外周部相对叠设。第一平面绕组T3各匝外线圈的第一圈部c1和第二平面绕组B3各匝外线圈的第二圈部c2相对叠设，第一平面绕组T3各匝内线圈的所述第一外圈部a1和第二平面绕组B3各匝内线圈的所述第二外圈部a2相对叠设，第一平面绕组T3各匝内线圈的所述第一内圈部b1和第二平面绕组B3各匝内线圈的所述第二内圈部b2相对叠设。
且所述第一平面绕组T3内周部的外线圈与所述第一平面绕组T3内周部的内线圈串联，所述第一平面绕组T3内周部的各匝内线圈与所述第二平面绕组B3内周部的各匝内线圈并联，所述第二平面绕组B3内周部的内线圈与所述第二平面绕组B3外周部的外线圈串联。具体的，第一平面绕组T3的外周部由外至内第m匝外线圈To3m、……、第2匝外线圈To32、第一匝外线圈To31依次串联后与内周部的第一匝内线圈Ti31、第二匝内线圈Ti32、……、第n匝内线圈Ti3n依次串联；第一平面绕组T3的内周部的第一匝内线圈Ti31与第二平面绕组B3的第一匝内线圈Bi31并联、第二匝内线圈Ti32与第二平面绕组B3的第二匝内线圈Bi32并联、……、第n匝内线圈Ti3n与第二平面绕组B3的第n匝内线圈Bi3n并联；第二平面绕组B3的外周部由外至内第m匝外线圈Bo3m、……、第2匝外线圈Bo32、第一匝外线圈Bo31依次串联后与内周部的第一匝内线圈Bi31、第二匝内线圈Bi32、……、第n匝内线圈Bi3n依次串联。
在一个可选的实施方式中，请参阅图7，第一平面绕组T3的内周部的各匝内线圈和第二平面绕组B3的内周部的各匝内线圈通过金属化过孔9并联。所述第一平面绕组T3的至少一匝内线圈包括至少一个交叉部M，本申请实施例中，第一平面绕组T3的内周部的每一匝内线圈均设有三个间隔的交叉部M，且对于每一匝内线圈来说每经过一次交叉部M，该匝内线圈的第一外圈部a1和第一内圈部b1在线圈的延伸方向上由外至内就会更换一次排布顺序。所述第二平面绕组B3的至少一匝内线圈包括至少一个交叉部M，本申请实施例中，第一平面绕组B3的内周部的每一匝内线圈均设有三个间隔的交叉部M，且对于每一匝内线圈来说每经过一次交叉部M，该匝内线圈的第一外圈部a1和第一内圈部b1在线圈的延伸方向上由外至内就会更换一次排布顺序。所述第一平面绕组T3的交叉部M与所述第二平面绕组B3的交叉部M相对叠设。
在所述第一平面绕组T3的各个交叉部M中，第一平面绕组T3的第一内圈部b1开设有让位部7，第一外圈部a1的弯折部n穿过所述让位部7。在所述第二平面绕组B3的各个交叉部M中，第二平面绕组B3的第一外圈部a1开设有让位部7，所述第一内圈部a1的弯折部N穿过所述让位部7。且第一平面绕组T3的交叉部M和第而平面绕组T3的交叉部M叠设后，所述第一平面绕组T3中的弯折部N与所述第二平面绕组B3中的弯折部N交叉设置，且各匝内线圈的外圈部和内圈部中弯折部N的两侧和让位部7的两侧均设有过孔9，且通过金属化过孔9实现第一平面绕组T3和第二平面绕组B3的各匝内线圈的并联。
本申请实施例的线圈，从外往内，外周部以第一平面绕组T3和第二平面绕组B3中叠设的三匝外线圈四股并行（第一圈部c1或第二圈部c2）绕设，内周部以第一平面绕组T3和第二平面绕组B3中叠设的五匝内线圈两股并行（第一内圈部b1和第一外圈部a1或者第二内圈部b2和第二外圈部a2）绕设，使得外线圈充分利用外围空间，内线圈和外线圈的电流分布更均匀，磁场分布更均匀，感应线圈的交流电阻更小。
本申请实施例的仿真实验表明：以4股11匝组成的绕线组3，在线圈内径20mm，外径48mm，线距良率控制量产水平，铜厚2Oz的条件下，经测试，电感为5uH左右，电感交流电阻<185mohm，可见，线圈100的电感值和电阻值较小且低于现有结构线圈，可以说明本申请的线圈100的传输效率高。
本申请还提供一种无线充电设备，该设备包括所述线圈100。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (10)

1、一种线圈，其包括第一线端、第二线端以及将所述第一线端连接至所述第二线端的绕线组，所述绕线组至少包括叠设的第一平面绕组和第二平面绕组；其特征在于，
所述第一平面绕组由外至内包括相邻的外周部和内周部；所述第一平面绕组的外周部包括至少一匝外线圈，所述第一平面绕组的外线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的四股第一圈部；所述第一平面绕组的内周部至少包括一匝内线圈，所述第一平面绕组的内线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的第一外圈部和第一内圈部；
所述第二平面绕组由外至内包括相邻的外周部和内周部；所述第二平面绕组的外周部包括至少一匝外线圈，所述第二平面绕组的外线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的四股第二圈部；所述第二平面绕组的内周部至少包括一匝内线圈，所述第二平面绕组的内线圈设有沿线圈延伸方向延伸的切槽，并包括由所述切槽分隔的第二外圈部和第二内圈部；
所述第一圈部与所述第二圈部相对叠设，所述第一外圈部和所述第二外圈部相对叠设，所述第一内圈部和所述第二内圈部相对叠设；所述第一平面绕组的外线圈与所述第一平面绕组的内线圈串联，所述第一平面绕组的内线圈与所述第二平面绕组的内线圈并联，所述第二平面绕组的内线圈与所述第二平面绕组的外线圈串联。
2、根据权利要求1所述的线圈，其特征在于，
在线圈的延伸方向上，所述第一平面绕组的外线圈包括外周部中最内侧的第一匝外线圈，所述第一平面绕组的内线圈包括内周部最外侧的第一匝内线圈，所述第一平面绕组的第一匝内线圈的首端与第一匝外线圈的部分尾端相对且通过连接部相连。
3、根据权利要求2所述的线圈，其特征在于，
在线圈的延伸方向上，所述第一平面绕组和所述第二平面绕组的内线圈还包括位于内周部最内侧的第n匝内线圈，
所述第二平面绕组的外线圈包括外周部中最内侧的第一匝外线圈，所述第二平面绕组的内线圈包括内周部最外侧的第一匝内线圈，所述第二平面绕组的第一匝内线圈的首端与第一匝外线圈的首端相邻设置，所述第二平面绕组的第n匝内线圈的尾端与所述第一匝外线圈的首端通过出线段相连，所述出线段沿所述第二平面绕组的内周部的径向延伸。
4、根据权利要求3所述的线圈，其特征在于，
所述第一平面绕组的内线圈还包括由外至内与所述第一匝内线圈相邻的第二匝内线圈，所述第一平面绕组的第一匝内线圈的尾端与第二匝内线圈的首端相对且通过连接部相连；
所述第二平面绕组的内线圈还包括由外至内与所述第一匝内线圈相邻的第二匝内线圈，所述第二平面绕组的第一匝内线圈的尾端与第二匝内线圈的首端相对且通过连接部相连。
5、根据权利要求3所述的线圈，其特征在于，
所述第一平面绕组的外线圈由内至外还包括与所述第一匝外线圈相邻的第二匝外线圈，所述第一平面绕组的第一匝外线圈的部分第一圈部的尾端与第二匝外线圈的部分第一圈部的尾端相对，第一匝外线圈的第一圈部的首端与第二匝外线圈的第一圈部的尾端通过跨接部相连；
所述第一平面绕组的外线圈还包括位于外周部最外侧的第m匝外线圈，所述第m匝外线圈的第一圈部的首端与所述第一线端相连。
6、根据权利要求3所述的线圈，其特征在于，
所述第二平面绕组的外线圈由内至外还包括与所述第一匝外线圈相邻的第二匝外线圈，所述第二平面绕组的第一匝外线圈的部分第一圈部的尾端与第二匝外线圈的部分第一圈部的首端相对，第一匝外线圈的第一圈部的尾端与第二匝外线圈的第一圈部的首端通过跨接部相连；
所述第一平面绕组的外线圈还包括位于外周部最外侧的第m匝外线圈，所述第m匝外线圈的第一圈部的尾端与所述第二线端相连。
7、根据权利要求1所述的线圈，其特征在于，
所述第一平面绕组的至少一匝内线圈包括至少一个交叉部，在所述第一平面绕组的交叉部中，所述第一内圈部开设有让位部，所述第一外圈部的弯折部穿过所述让位部，所述第一平面绕组的内线圈在所述交叉部的左右两端，更换第一外圈部和第一内圈部由外至内的排布顺序。
8、根据权利要求7所述的线圈，其特征在于，所述第二平面绕组的至少一匝内线圈包括至少一个交叉部，在所述第二平面绕组的交叉部中，所述第一外圈部开设有让位部，所述第一内圈部的弯折部穿过所述让位部，所述第一平面绕组的内线圈在所述交叉部的左右两端，更换第一外圈部和第一内圈部由外至内的排布顺序。
9、根据权利要求8所述的线圈，其特征在于，
所述第一平面绕组的交叉部与所述第二平面绕组的交叉部相对叠设，且所述第一平面绕组交叉部中的弯折部与所述第二平面绕组交叉部中的弯折部交叉设置。
10、一种无线充电设备，其特征在于，该设备包括如权利要求1-9中的任意一项所述的线圈。
PCT/CN2020/117755 2020-09-11 2020-09-25 线圈和无线充电设备 WO2022052182A1 (zh)

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