WO2022052183A1 - 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
WO2022052183A1
WO2022052183A1 PCT/CN2020/117756 CN2020117756W WO2022052183A1 WO 2022052183 A1 WO2022052183 A1 WO 2022052183A1 CN 2020117756 W CN2020117756 W CN 2020117756W WO 2022052183 A1 WO2022052183 A1 WO 2022052183A1
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WO
WIPO (PCT)
Prior art keywords
circle
coil
circle part
winding
turn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/117756
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English (en)
French (fr)
Inventor
王红军
刘毛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
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Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Holdings Nanjing Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022052183A1 publication Critical patent/WO2022052183A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H01F27/2871—Pancake coils
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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—ELECTRIC POWER NETWORKS; 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—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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 group connecting the first wire end to the second wire end
  • the winding set includes at least a first planar winding, and the first planar winding includes a first coil connected to the first wire end and a second coil connected to the second wire end;
  • the first coil includes a first half-turn portion directly connected to the first wire end and extending in a first direction, and a first half-turn portion extending from the end of the first half-turn portion in a direction close to the center of the winding group. a first connecting portion and a second half-circle portion extending in a first direction from an end of the first connecting portion;
  • the second coil includes a third half-turn portion extending in the first direction, and a fourth half-turn portion displaced from the third half-turn portion in the radial direction of the winding group and extending in the first direction.
  • the third half-circle part, the fourth half-circle part is far away from the center of the winding group, the end of the third half-circle part is electrically connected with the head end of the fourth half-circle part, the fourth half-circle part is The end of the loop portion is directly connected with the second wire end;
  • the end of the first half-circle portion is opposite to the head end of the fourth half-circle portion, and the end of the third half-circle portion is opposite to the head end of the second half-circle portion.
  • the winding set further includes at least a second plane winding stacked with the first plane winding, and the second plane winding includes a third coil stacked with the first coil and a third coil stacked with the first plane winding.
  • the third coil includes a fifth half-circle part overlapping with the first half-circle part and a sixth half-circle part overlapping with the second half-circle part;
  • the fourth coil includes a seventh half-circle part overlapping with the third half-circle part, an eighth half-circle part overlapping with the fourth half-circle part, and an end connected to the seventh half-circle part and the second connecting portion of the head end of the eighth half-circle portion;
  • the first half-circle part and the fifth half-circle part are connected in parallel
  • the second half-circle part and the sixth half-circle part are connected in parallel
  • the third half-circle part and the seventh half-circle part are connected in parallel
  • the fourth half-circle part and the eighth half-circle part are connected in parallel.
  • the first half-circle part is connected in parallel with the fifth half-circle part through a via hole
  • the second half-circle part is connected in parallel with the sixth half-circle part through a via hole
  • the third half-circle part is connected in parallel with each other.
  • the seventh half-circle portion is connected in parallel through the via hole
  • the fourth half-circle portion is connected in parallel with the eighth half-circle portion through the via hole.
  • the first planar winding further includes a fifth coil and a sixth coil
  • the fifth coil includes a ninth half-circle part connected to the end of the second half-circle part and extending along the first direction, a third connecting portion extending from the end of the ninth half-turn portion to a direction close to the center of the winding group, and a tenth half-turn portion extending from the end of the third connecting portion in the first direction;
  • the sixth coil includes an eleventh half-turn portion extending in the first direction and a twelfth half-turn portion displaced from the eleventh half-turn portion in the radial direction of the winding group and extending in the first direction, Compared with the eleventh half-turn portion, the twelfth half-turn portion is farther from the center of the winding group, and the end of the eleventh half-turn portion is electrically connected to the head end of the twelfth half-turn portion. connecting, the end of the twelfth half-circle part is connected with the head end of the third half-circle part;
  • the end of the ninth half-circle portion is opposite to the head end of the twelfth half-circle portion, and the end of the eleventh half-circle portion is opposite to the head end of the tenth half-circle portion Opposite; the head end of the third half-circle part is opposite to the tail end of the fourth half-circle part, the head end of the ninth half-circle part is opposite to the tail end of the second half-circle part and passes through a
  • the circumferential connecting portions extending along the first direction are connected, and the first end of the eleventh half-circle portion is opposite to the trailing end of the twelfth half-circle portion.
  • the second planar winding further includes a seventh coil and an eighth coil, the seventh coil is stacked with the fifth coil, and the eighth coil is stacked with the sixth coil;
  • the seventh coil includes a thirteenth half-circle part stacked with the ninth half-circle part and a fourteenth half-circle part stacked with the tenth half-circle part;
  • the eighth coil includes a fifteenth half-turn portion stacked with the eleventh half-turn portion, a sixteenth half-turn portion stacked with the twelfth half-turn portion, and connecting the fifteenth half-turn portion a fourth connecting portion between the end of the half-circle portion and the head end of the sixteenth half-circle portion;
  • the ninth half-circle part and the thirteenth half-circle part are connected in parallel, the tenth half-circle part and the fourteenth half-circle part are connected in parallel, and the eleventh half-circle part and the fifteenth half-circle part are connected in parallel.
  • the half-circle parts are connected in parallel, and the twelfth half-circle part and the sixteenth half-circle part are connected in parallel;
  • the head end of the thirteenth half-circle part is opposite to the end of the six-half-circle part and is spaced apart to form a vacant part
  • the head end of the fifteenth half-circle part is opposite to the end of the sixth half-circle part
  • the ends of the sixteen half-circle portions are opposite to each other, and the ends of the sixteenth half-circle portion and the end of the seventh half-circle portion are connected by a bridging portion, and the bridging portion passes through the escaping portion.
  • the first direction is a clockwise direction or a counterclockwise direction.
  • each half-turn portion of the first planar winding or the second planar winding respectively includes a slot extending along the first direction and two sub-turn portions separated by the slot.
  • the line widths of the two sub-circles of each half-circle portion of the first planar winding or the second planar winding are the same and the spacing distances are the same.
  • the present application also provides a wireless charging device including the above-mentioned coil.
  • a coil and a wireless charging device are provided, wherein the coils adopt spaced and crossed incoming wires to achieve symmetrical distribution of the end-to-end coils, that is, the coil closest to the input port and the coil closest to the output port are One group, the coils that are next to the input port and the coils that are next to the output port are a group, and so on, the lengths of the two coils in each group are equal, so that the coil current distribution is more uniform, and the magnetic field distribution is more uniform, so Reduce the AC resistance.
  • 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 a schematic diagram of the first plane point winding structure in Fig. 2;
  • Fig. 4 is a schematic diagram of the second plane winding structure in Fig. 2;
  • Fig. 5 is the enlarged view of Q part among Fig. 3;
  • Fig. 6 is the enlarged view of Q' part among Fig. 4;
  • Fig. 7 is an enlarged view of part P in Fig. 3;
  • Fig. 8 is the enlarged view of P' part among Fig. 4;
  • coil 100 first wire end 1; second wire end 2; winding group 3; first planar winding T3; first coil T31; first half-turn portion a1; second half-turn portion a2; first connection part a3; second coil T32; third half-turn part b1; fourth half-turn part b2; fifth coil T33; ninth half-turn part c1; tenth half-turn part c2; third connection part c3; sixth Coil T34; eleventh half-turn portion d1; twelfth half-turn portion d2; n-th coil T3n; second planar winding B3; third coil B31; fifth half-turn portion e1; sixth half-turn portion e2; Fourth coil B32; seventh half-turn part f1; eighth half-turn part f2; second connection part f3; seventh coil B33; thirteenth half-turn part g1; fourteenth half-turn part g2; eighth coil B34; The fifteenth half-circle portion h
  • 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
  • the coil is made by winding around, and the extending direction of the coil from the first wire end 1 to the second wire end 2 is defined as the first direction.
  • the present application does not limit the coil to include a two-layer planar winding, and the coil can be adjusted to a single-layer planar winding or a multi-layer planar winding as required.
  • the head end and the end herein are the start end and the end end viewed along the first direction, respectively, and in the present application from outside to inside, inside, outside are all from the beginning of the coil. end look.
  • the first planar winding T3 includes a first coil T31 , a second coil T32 , a fifth coil T33 , a sixth coil T34 , ⁇ , and an nth coil T3n sequentially from outside to inside.
  • two adjacent turns of coils from the outside to the inside are a group, for example, the first coil T31 and the second coil T32 are a group of coils, the fifth coil T33 and the sixth coil T34 are a group, ..., if the number of coil turns If it is an odd number, the innermost nth coil T3n is not grouped with other coils.
  • One of the turns of each set of coils includes two half-turn portions and a connecting portion connected between the two half-turn portions, the two half-turn portions of the turn of the coil both extend in the first direction, but one of the half-turn portions
  • the other half-circle part is located in the direction away from the center of the winding group 3, and the other half-circle part is located in the direction close to the center of the winding group 3, and the connecting part connects the end of the half-circle part away from the winding group 3 and the end of the half-circle part close to the winding group 3.
  • the head end of the half-turn portion of the coil the difference is that the other turn of the coils in each group includes two half-turn portions, both of which extend in the first direction but in the radial direction of the winding group 3. Dislocation arrangement, and the end of the half-turn part far away from the winding group 3 is electrically connected with the head end of the half-turn part close to the winding group 3; in each group of coils, the head and tail between the two half-turn parts far from the winding group 3 Conversely, the two half-turn portions close to the winding group 3 face each other end to end, so that the two turns of the coils of each group are crossed.
  • the first coil T31 includes a first half-turn portion a1, a second half-turn portion a2, and a first half-turn portion a1 and a second half-turn portion a2.
  • a connecting part a3, the first half-turn part a1 is farther from the center of the winding group 3 than the second half-turn part a2;
  • the second coil T32 includes the third half-turn part b1 and the fourth half-turn part b2 that are electrically connected, the fourth The half-circle part b2 is farther from the center of the winding group 3 than the third half-circle part b1; in the first direction, the end of the first half-circle part a1 is opposite to the head end of the fourth half-circle part b2, The end of the third half-circle portion b1 is opposite to the head end of the second half-circle portion a2.
  • the fifth coil T33 includes a ninth half-turn portion c1, a tenth half-turn portion c2, and a connecting ninth half-turn portion
  • the third connection portion c3 between c1 and the tenth half-turn portion c2, the ninth half-turn portion c1 is farther from the center of the winding set 3 than the tenth half-turn portion c2
  • the sixth coil T34 includes the eleventh half of the electrical connection
  • the twelfth half circle portion d2 is farther from the center of the winding group 3 than the eleventh half circle portion d1; in the first direction, the ninth half circle portion c1
  • the end of the twelfth half-circle portion d2 is opposite to the head end of the twelfth half-circle portion d1, and the end of the eleventh half-circle portion d
  • the second planar winding B3 includes a third coil B31 , a fourth coil B32 , a seventh coil B33 , an eighth coil B34 , .
  • two adjacent turns of coils from the outside to the inside are a group, for example, the third coil B31 and the fourth coil B32 are a group of coils, the seventh coil B33 and the eighth coil B34 are a group, ..., if the number of coil turns If it is an odd number, the innermost m-th coil B3m is not grouped with other coils.
  • One of the turns of each set of coils includes two half-turn portions and a connecting portion connected between the two half-turn portions, the two half-turn portions of the turn of the coil both extend in the first direction, but one of the half-turn portions
  • the other half-circle part is located in the direction away from the center of the winding group 3, and the other half-circle part is located in the direction close to the center of the winding group 3, and the connecting part connects the end of the half-circle part away from the winding group 3 and the end of the half-circle part close to the winding group 3.
  • the head end of the half-turn portion of the coil the difference is that the other turn of the coils in each group includes two half-turn portions, both of which extend in the first direction but in the radial direction of the winding group 3. Dislocation arrangement, and the end of the half-turn part far away from the winding group 3 is electrically connected with the head end of the half-turn part close to the winding group 3; in each group of coils, the head and tail between the two half-turn parts far from the winding group 3 Conversely, the two half-turn portions close to the winding group 3 face each other end to end, so that the two turns of the coils of each group are crossed.
  • each coil of the first planar winding T3 and the second planar winding B3 are stacked relative to each other, and the half-turn portions of the stacked coils are also stacked correspondingly.
  • the first coil T31 and the third coil B31 are stacked relative to each other.
  • the third coil B31 includes a fifth half-turn portion e1 stacked with the first half-turn portion a1 and a sixth half-turn portion e1 stacked with the second half-turn portion a2.
  • the first half-circle part a1 and the fifth half-circle part e1 are connected in parallel
  • the second half-circle part a2 and the sixth half-circle part e2 are connected in parallel.
  • the second coil T32 and the fourth coil B32 are stacked relative to each other.
  • the fourth coil B32 includes a seventh half-turn portion f1 stacked with the third half-turn portion b1, and a seventh half-turn portion f1 stacked with the fourth half-turn portion b2.
  • the circle portion f1 is connected in parallel
  • the fourth half-circle portion b2 and the eighth half-circle portion f2 are connected in parallel.
  • the fifth coil T33 and the seventh coil B33 are stacked relative to each other; specifically, the seventh coil B33 includes a thirteenth half-turn portion g1 stacked with the ninth half-turn portion c1 and a thirteenth half-turn portion g1 stacked with the tenth half-turn portion c2.
  • the fourteenth half-circle part g2, the ninth half-circle part c1 and the thirteenth half-circle part g1 are connected in parallel, and the tenth half-circle part c2 and the fourteenth half-circle part g2 are connected in parallel.
  • the sixth coil T34 and the eighth coil B34 are stacked relative to each other; specifically, the eighth coil B34 includes a fifteenth half-turn h1 stacked with the eleventh half-turn d1, and the twelfth half-turn d2
  • the nth coil T3n and the mth coil B3m are stacked opposite each other and are connected in parallel through the metallized vias 9 .
  • the end of the thirteenth half-circle portion g1 is opposite to the head end of the sixteenth half-circle portion h2, and the end of the fifteenth half-circle portion h1 is opposite to the fourteenth half-circle portion h1.
  • the leading ends of the ring portion g2 are opposed to each other.
  • each half-turn portion of the first planar winding T3 and the second planar winding B3 is provided with a slot 5 extending along the extending direction of the coil, and each half-turn portion includes two sub-ring portions 4 separated by the slot 5 .
  • the first wire end 1 is connected to the head end of the first coil T31 of the first planar winding T3 . It should be noted that, in other embodiments, the first wire end 1 may also be connected to the head end of the third coil B31 of the second planar winding B3.
  • the second wire end 2 is connected to the tail end of the second coil T32 of the first planar winding T3 (the tail end of the fourth half-turn portion b2 ). It should be noted that, in other embodiments, the first wire end 1 may also be connected to the tail end of the fourth coil B32 of the second planar winding B3 (the tail end of the eighth half-turn portion f2 ).
  • the inner turns of coils in each group of coils are opposite end to end.
  • the tail end of the second coil T32 (the tail end of the fourth half-turn portion b2 ) is disposed opposite to the head end of the second coil T32 (the head end of the third half-turn portion b1 ).
  • the tail end of the eight-half-turn portion f2) is opposite to the head end of the fourth coil T34 (the head end of the seventh half-turn portion f1).
  • the tail end of the other coil in each group of coils (the outer one-turn coil in each group of coils) is connected to the other coil in the adjacent group of coils (the outer one-turn coil in each group of coils) ) are opposite and connected by a circumferential connecting portion 8, wherein the circumferential connecting portion 8 extends in the first direction.
  • the tail end of the first coil T31 (the tail end of the second half-turn portion a2 ) is opposite to the head end of the fifth coil T33 (the head end of the ninth half-turn portion c1 ) and connected by the circumferential connection portion 8 .
  • the other two groups of coils are also provided with a circumferential connecting portion 8 to connect the head and tail ends of the two outer coils in the two groups of coils, so as to transfer the current from the one-turn coil. to the adjacent turn of the coil.
  • the tail end of the outer coil in each group of coils is opposite to the head end of the outer coil in the adjacent group of coils and forms an interval.
  • the head end and the tail end of the inner coil of each group of coils are arranged oppositely, and from the outside to the inside, the head end of the inner coil of each group of coils and the tail end of the outer coil of the adjacent group of coils are connected by a bridge.
  • the parts 6 are connected, the jumper 6 transfers the current from one turn of the coil to the adjacent turn of the coil, and the jumper 6 passes through the give-away part 7 of the adjacent two sets of coils.
  • the tail end of the third coil B31 (the tail end of the sixth half-turn portion e2 ) is opposite to the head end of the seventh coil B33 (the head end of the thirteenth half-turn portion g1 ) and is spaced apart to form a vacant portion 7 .
  • the head end of the fourth coil B32 (the head end of the seventh half-turn portion f1 ) is disposed opposite to the tail end of the fourth coil B34 (the tail end of the eighth half-turn portion f2 ), and the head end of the fourth coil B32 (the head end of the seventh half-turn portion f2 )
  • the head end of the half-turn portion f1 ) and the tail end of the eighth coil B34 (the tail end of the sixteenth half-turn portion h2 ) are connected by a bridging portion 6 , and the bridging portion 6 passes through the escape portion 7 .
  • via holes 9 are provided at the head end and the tail end of each coil, and the stacked coils are connected in parallel through the metallized via holes 9, so that the first planar winding T3 and the first planar winding
  • the coils stacked between the two planar windings B3 share the circumferential connecting portion 8 and the bridging portion 6 with each other.
  • the head end of the second coil T32 of the first planar winding T3 (the head end of the third half-turn portion b1 ) and the tail end of the sixth coil T32 (the tail end of the twelfth half-turn portion d2 ) pass through the second planar winding A bridge portion 6 of B3 is connected; the tail end of the third coil B31 of the second planar winding B3 (the tail end of the seventh half-turn portion f1 ) and the head end of the seventh coil B32 (the thirteenth half-turn portion)
  • the head end of g1) is connected through the circumferential connection portion 8 of the first planar winding T3.
  • the wires are crossed at intervals to achieve symmetrical distribution of the head and tail coils, so that the lengths of the two turns of the coils in each group of coils are equal, that is, the first coil T31 and the second coil T32 (or the third coil B31 and the The length of the fourth coil B32) is equal, the length of the fifth coil T33 and the sixth coil T34 (or the seventh coil B33 and the eighth coil B34) are equal, and so on, so that the coil current distribution is more uniform and the magnetic field distribution is more uniform, Thereby reducing the AC resistance.
  • the simulation experiment of the embodiment of the present application shows that the winding group 3 composed of 4 strands of 11 has an inner diameter of 20 mm, an outer diameter of 48 mm, the wire spacing yield controls the mass production level, and the copper thickness is 2Oz.
  • the inductance is About 5uH
  • 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 conventional coil, which shows that the coil 100 of the present application has high transmission efficiency.
  • the present application also provides a wireless charging device including the coil 100 .

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Abstract

一种线圈和无线充电设备，所述线圈采用间隔交叉进线以达到首尾线圈对称式分布，即与输入端口最相近的线圈和与输出端口最相近的线圈为一组，与输入端口次相近的线圈和与输出端口次相近的线圈为一组，以此类推，每组中的两线圈的线长相等，使线圈电流分布更均匀，磁场分布更均匀，从而减小交流电阻。

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第一平面绕组，所述第一平面绕组包括与所述第一线端连接的第一线圈以及与所述第二线端连接的第二线圈；
所述第一线圈包括与所述第一线端直接连接并沿第一方向延伸的第一半圈部、自所述第一半圈部的末端向靠近所述绕线组中心的方向延伸的第一连接部以及自所述第一连接部的末端沿第一方向延伸的第二半圈部；
所述第二线圈包括沿第一方向延伸的第三半圈部以及在所述绕线组的径向与第三半圈部错位并沿第一方向延伸的第四半圈部，相比所述第三半圈部，所述第四半圈部远离所述绕线组中心，所述第三半圈部的末端与所述第四半圈部的首端电连接，所述第四半圈部的末端与所述第二线端直接连接；
在第一方向上，所述第一半圈部的末端与所述第四半圈部的首端相对，所述第三半圈部的末端与所述第二半圈部的首端相对。
优选的，所述绕线组至少还包括与所述第一平面绕组叠设的第二平面绕组，所述第二平面绕组包括与所述第一线圈叠设的第三线圈以及与所述第二线圈叠设的第四线圈；
所述第三线圈包括与所述第一半圈部叠设的第五半圈部以及与所述第二半圈部叠设的第六半圈部；
所述第四线圈包括与所述第三半圈部叠设的第七半圈部、与所述第四半圈部叠设的第八半圈部以及连接所述第七半圈部的末端和所述第八半圈部的首端的第二连接部；
所述第一半圈部和所述第五半圈部并联，所述第二半圈部和所述第六半圈部并联，所述第三半圈部和所述第七半圈部并联，所述第四半圈部和所述第八半圈部并联。
优选的，所述第一半圈部通过过孔和所述第五半圈部并联，所述第二半圈部通过过孔和所述第六半圈部并联，所述第三半圈部通过过孔和所述第七半圈部并联，所述第四半圈部通过过孔和所述第八半圈部并联。
优选的，所述第一平面绕组还包括第五线圈和第六线圈，所述第五线圈包括与所述第二半圈部的末端连接并沿第一方向延伸的第九半圈部、自所述第九半圈部的末端向靠近所述绕线组中心的方向延伸的第三连接部以及自所述第三连接部的末端沿第一方向延伸的第十半圈部；
所述第六线圈包括沿第一方向延伸的第十一半圈部以及在所述绕线组的径向与第十一半圈部错位并沿第一方向延伸的第十二半圈部，相比所述第十一半圈部，所述第十二半圈部远离所述绕线组中心，所述第十一半圈部的末端与所述第十二半圈部的首端电连接，所述第十二半圈部的末端与所述第三半圈部的首端连接；
在第一方向上，所述第九半圈部的末端与所述第十二半圈部的首端相对，所述第十一半圈部的末端与所述第十半圈部的首端相对；所述第三半圈部的首端与所述第四半圈部的尾端相对，所述第九半圈部的首端与所述第二半圈部的尾端相对且通过一沿第一方向延伸的周向连接部相连，所述第十一半圈部的首端与所述第十二半圈部的尾端相对。
优选的，所述第二平面绕组还包括第七线圈和第八线圈，所述第七线圈与所述第五线圈叠设，所述第八线圈与所述第六线圈叠设；
所述第七线圈包括与所述第九半圈部叠设的第十三半圈部以及与所述第十半圈部叠设的第十四半圈部；
所述第八线圈包括与所述第十一半圈部叠设的第十五半圈部、与所述第十二半圈部叠设的第十六半圈部以及连接所述第十五半圈部的末端和所述第十六半圈部的首端的第四连接部；
所述第九半圈部和所述第十三半圈部并联，所述第十半圈部和所述第十四半圈部并联，所述第十一半圈部和所述第十五半圈部并联，所述第十二半圈部和所述第十六半圈部并联；
在第一方向上，所述第十三半圈部的首端与所述六半圈部的末端相对且间隔形成一让位部，所述第十五半圈部的首端与所述第十六半圈部的末端相对，所述第十六半圈部的末端与所述第七半圈部的末端通过一跨接部连接，所述跨接部穿过所述让位部。
优选的，所述第一方向为顺时针方向或逆时针方向。
优选的，所述第一平面绕组或所述第二平面绕组的各半圈部分别包括沿第一方向延伸的切槽以及由所述切槽分隔的两个子圈部。
优选的，所述第一平面绕组或所述第二平面绕组的各半圈部的两个所述子圈部的线宽相同且间隔距离相同。
本申请还提供了一种无线充电设备，该设备包括如上所述的线圈。
 有益效果
本申请的有益效果在于：提供了一种线圈和无线充电设备，所述线圈采用间隔交叉进线以达到首尾线圈对称式分布，即与输入端口最相近的线圈和与输出端口最相近的线圈为一组，与输入端口次相近的线圈和与输出端口次相近的线圈为一组，以此类推，每组中的两线圈的线长相等，使线圈电流分布更均匀，磁场分布更均匀，从而减小交流电阻。
 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中第一平面点绕组结构示意图；
图4位图2中第二平面绕组结构示意图；
图5为图3中Q部分的放大图；
图6为图4中Q’部分的放大图；
图7为图3中P部分的放大图；
图8为图4中P’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；第一线圈T31；第一半圈部a1；第二半圈部a2；第一连接部a3；第二线圈T32；第三半圈部b1；第四半圈部b2；第五线圈T33；第九半圈部c1；第十半圈部c2；第三连接部c3；第六线圈T34；第十一半圈部d1；第十二半圈部d2；第n线圈T3n；第二平面绕组B3；第三线圈B31；第五半圈部e1；第六半圈部e2；第四线圈B32；第七半圈部f1；第八半圈部f2；第二连接部f3；第七线圈B33；第十三半圈部g1；第十四半圈部g2；第八线圈B34；第十五半圈部h1；第十六半圈部h2；第四连接部h3；第m线圈B3m；子圈部4；切槽5；跨接部6；让位部7；周向连接部8；过孔9。
 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1-8，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，这里定义线圈从第一线端1至第二线端2的延伸方向为第一方向。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，线圈可调整为单层平面绕组或者多层平面绕组。
本申请的末端和尾端指代相同，本文中的首端、末端分别为沿第一方向观察的起始端和终止端，且本申请的由外至内、内侧、外侧均是从线圈的首端来看。
所述第一平面绕组T3包括依次由外至内的第一线圈T31、第二线圈T32、第五线圈T33、第六线圈T34、……、第n线圈T3n。其中，由外至内相邻两匝线圈为一组，例如第一线圈T31和第二线圈T32为一组线圈，第五线圈T33和第六线圈T34为一组，……，若线圈匝数为奇数，最内侧的第n线圈T3n不与其他线圈成组。各组线圈中的其中一匝线圈包括两个半圈部以及连接在两个半圈部之间的连接部，该匝线圈的两个半圈部均沿第一方向延伸，但其中一个半圈部设于远离绕线组3的中心方向，另一个半圈部则设于靠近绕线组3的中心方向，且连接部连接远离绕线组3的半圈部的末端和靠近绕线组3的半圈部的首端；与之不同的是，各组线圈中的另一匝线圈包括两个半圈部，两个半圈部均沿第一方向延伸但在绕线组3的径向上错位设置，且远离绕线组3的半圈部的末端与靠近绕线组3的半圈部的首端电连接；各组线圈中，远离绕线组3的两个半圈部之间首尾相对，靠近绕线组3的两个半圈部之间首尾相对，以使得每组的两匝线圈之间交叉设置。以第一线圈T31和第二线圈T32为例，第一线圈T31包括第一半圈部a1、第二半圈部a2以及连接第一半圈部a1和第二半圈部a2之间的第一连接部a3，第一半圈部a1比第二半圈部a2远离绕线组3的中心；第二线圈T32包括电连接的第三半圈部b1和第四半圈部b2，第四半圈部b2比第三半圈部b1部远离绕线组3的中心；在第一方向上，所述第一半圈部a1的末端与所述第四半圈部b2的首端相对，所述第三半圈部b1的末端与所述第二半圈部a2的首端相对。以第五线圈T33和第六线圈T34为例，与第一线圈T31和第二线圈T32一样，第五线圈T33包括第九半圈部c1、第十半圈部c2以及连接第九半圈部c1和第十半圈部c2之间的第三连接部c3，第九半圈部c1比第十半圈部c2远离绕线组3的中心；第六线圈T34包括电连接的第十一半圈部d1和第十二半圈部d2，第十二半圈部d2比第十一半圈部d1部远离绕线组3的中心；在第一方向上，所述第九半圈部c1的末端与所述第十二半圈部d2的首端相对，所述第十一半圈部d1的末端与所述第十半圈部c2的首端相对。
所述第二平面绕组B3包括依次由外至内的第三线圈B31、第四线圈B32、第七线圈B33、第八线圈B34、……、第m线圈B3m。其中，由外至内相邻两匝线圈为一组，例如第三线圈B31和第四线圈B32为一组线圈，第七线圈B33和第八线圈B34为一组，……，若线圈匝数为奇数，最内侧的第m线圈B3m不与其他线圈成组。各组线圈中的其中一匝线圈包括两个半圈部以及连接在两个半圈部之间的连接部，该匝线圈的两个半圈部均沿第一方向延伸，但其中一个半圈部设于远离绕线组3的中心方向，另一个半圈部则设于靠近绕线组3的中心方向，且连接部连接远离绕线组3的半圈部的末端和靠近绕线组3的半圈部的首端；与之不同的是，各组线圈中的另一匝线圈包括两个半圈部，两个半圈部均沿第一方向延伸但在绕线组3的径向上错位设置，且远离绕线组3的半圈部的末端与靠近绕线组3的半圈部的首端电连接；各组线圈中，远离绕线组3的两个半圈部之间首尾相对，靠近绕线组3的两个半圈部之间首尾相对，以使得每组的两匝线圈之间交叉设置。且第一平面绕组T3和第二平面绕组B3的每一线圈相对叠设，叠设线圈的半圈部也分别对应叠设。第一线圈T31和第三线圈B31相对叠设，具体的，第三线圈B31包括与第一半圈部a1叠设的第五半圈部e1以及与第二半圈部a2叠设的第六半圈部e2，所述第一半圈部a1和所述第五半圈部e1并联，所述第二半圈部a2和所述第六半圈部e2并联。第二线圈T32和第四线圈B32相对叠设，具体的，第四线圈B32包括与第三半圈部b1叠设的第七半圈部f1、与所述第四半圈部b2叠设的第八半圈部f2以及连接所述第七半圈部f1的末端和所述第八半圈部f2的首端的第二连接部f3，所述第三半圈部b1和所述第七半圈部f1并联，所述第四半圈部b2和所述第八半圈部f2并联。第五线圈T33和第七线圈B33相对叠设；具体的，第七线圈B33包括与第九半圈部c1叠设的第十三半圈部g1以及与第十半圈部c2叠设的第十四半圈部g2，所述第九半圈部c1和所述第十三半圈部g1并联，所述第十半圈部c2和所述第十四半圈部g2并联。第六线圈T34和第八线圈B34相对叠设；具体的，第八线圈B34包括与第十一半圈部d1叠设的第十五半圈部h1、与所述第十二半圈部d2叠设的第十六半圈部h2以及连接所述第十五半圈部h1的末端和所述第八半圈部f2的首端的第四连接部h3，所述第十一半圈部d1和所述第十五半圈部h1并联，所述第十二半圈部d2和所述第十六半圈部h2并联。第n线圈T3n和第m线圈B3m相对叠设且通过金属化过孔9并联。在第一方向上，所述第十三半圈部g1的末端与所述第十六半圈部h2的首端相对，所述第十五半圈部h1的末端与所述第十四半圈部g2的首端相对。
且第一平面绕组T3和第二平面绕组B3的各半圈部均设有沿线圈延伸方向延伸的切槽5，各半圈部均包括被切槽5分隔的两个子圈部4。
本实施方式中，请参阅图1和图2，第一线端1与第一平面绕组T3的第一线圈T31的首端连接。需要说明的是，在其他实施例中，第一线端1也可与第二平面绕组B3的第三线圈B31的首端连接。
本实施方式中，请参阅图1和图2，第二线端2与第一平面绕组T3的第二线圈T32的尾端（第四半圈部b2的尾端）连接。需要说明的是，在其他实施例中，第一线端1也可与第二平面绕组B3的第四线圈B32的尾端（第八半圈部f2的尾端）连接。
所述第一平面绕组T3，在所述第一方向上，每组线圈中内侧的一匝线圈首尾相对。例如第二线圈T32的尾端（第四半圈部b2的尾端）与第二线圈T32的首端（第三半圈部b1的首端）相对设置，第四线圈T34的尾端（第八半圈部f2的尾端）与第四线圈T34的首端（第七半圈部f1的首端）相对。在所述第一方向上，每组线圈中的另一匝线圈（每组线圈中外侧的一匝线圈）的尾端与相邻组线圈中的另一线圈（每组线圈外侧的一匝线圈）的首端相对且通过周向连接部8连接，其中周向连接部8沿第一方向延伸。例如第一线圈T31的尾端（第二半圈部a2的尾端）与第五线圈T33的首端（第九半圈部c1的首端）相对并通过周向连接部8连接。以此类推，第一平面绕组T3中，其他两组的线圈中也都设有一周向连接部8，来连接两组线圈中两外侧线圈的首端和尾端，以将电流从一匝线圈传递至相邻一匝线圈。
且所述第二平面绕组B3，在所述第一方向上，由外至内，每组线圈中外侧一线圈的尾端与相邻一组线圈中外侧一线圈的首端相对且间隔形成一让位部7，每组线圈中内侧一线圈的首端和尾端相对设置且由外至内每组线圈内侧一线圈的首端与相邻组线圈中外侧一线圈的尾端通过一跨接部6相连，跨接部6将电流从一匝线圈传递至相邻一匝线圈，且该跨接部6穿过相邻两组线圈的让位部7。例如第三线圈B31的尾端（第六半圈部e2的尾端）与第七线圈B33的首端（第十三半圈部g1的首端）相对且间隔形成一让位部7，第四线圈B32的首端（第七半圈部f1的首端）与第四线圈B34的尾端（第八半圈部f2的尾端）相对设置，且第四线圈B32的首端（第七半圈部f1的首端）与第八线圈B34的尾端（第十六半圈部h2的尾端）通过一跨接部6连接，所述跨接部6穿过所述让位部7。在第二平面绕组B3和第二平面绕组T3中，各线圈的首端和尾端均设有过孔9，且叠设的线圈通过金属化过孔9并联，使得第一平面绕组T3和第二平面绕组B3之间叠设的线圈共用彼此的周向连接部8和跨接部6。例如第一平面绕组T3的第二线圈T32的首端（第三半圈部b1的首端）与第六线圈T32的尾端（第十二半圈部d2的尾端）通过第二平面绕组B3的一跨接部6相连；所述第二平面绕组B3的第三线圈B31的尾端（第七半圈部f1的尾端）与第七线圈B32的首端（第十三半圈部g1的首端）通过第一平面绕组T3的一周向连接部8连接。
本申请实施例的线圈，采用间隔交叉进线以达到首尾线圈对称式分布，使得每组线圈中的两匝线圈线长相等，即第一线圈T31与第二线圈T32（或第三线圈B31和第四线圈B32）线长相等，第五线圈T33和第六线圈T34线长（或第七线圈B33和第八线圈B34）相等，以此类推，使线圈电流分布更均匀，磁场分布更均匀，从而减小交流电阻。
本申请实施例的仿真实验表明：以4股11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 (9)

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，其特征在于，
所述绕线组至少包括第一平面绕组，所述第一平面绕组包括与所述第一线端连接的第一线圈以及与所述第二线端连接的第二线圈；
所述第一线圈包括与所述第一线端直接连接并沿第一方向延伸的第一半圈部、自所述第一半圈部的末端向靠近所述绕线组中心的方向延伸的第一连接部以及自所述第一连接部的末端沿第一方向延伸的第二半圈部；
所述第二线圈包括沿第一方向延伸的第三半圈部以及在所述绕线组的径向与第三半圈部错位并沿第一方向延伸的第四半圈部，相比所述第三半圈部，所述第四半圈部远离所述绕线组中心，所述第三半圈部的末端与所述第四半圈部的首端电连接，所述第四半圈部的末端与所述第二线端直接连接；
在第一方向上，所述第一半圈部的末端与所述第四半圈部的首端相对，所述第三半圈部的末端与所述第二半圈部的首端相对。
2、根据权利要求1所述的线圈，其特征在于，所述绕线组至少还包括与所述第一平面绕组叠设的第二平面绕组，所述第二平面绕组包括与所述第一线圈叠设的第三线圈以及与所述第二线圈叠设的第四线圈；
所述第三线圈包括与所述第一半圈部叠设的第五半圈部以及与所述第二半圈部叠设的第六半圈部；
所述第四线圈包括与所述第三半圈部叠设的第七半圈部、与所述第四半圈部叠设的第八半圈部以及连接所述第七半圈部的末端和所述第八半圈部的首端的第二连接部；
所述第一半圈部和所述第五半圈部并联，所述第二半圈部和所述第六半圈部并联，所述第三半圈部和所述第七半圈部并联，所述第四半圈部和所述第八半圈部并联。
3、根据权利要求2所述的线圈，其特征在于，所述第一半圈部通过过孔和所述第五半圈部并联，所述第二半圈部通过过孔和所述第六半圈部并联，所述第三半圈部通过过孔和所述第七半圈部并联，所述第四半圈部通过过孔和所述第八半圈部并联。
4、根据权利要求2所述的线圈，其特征在于，所述第一平面绕组还包括第五线圈和第六线圈，所述第五线圈包括与所述第二半圈部的末端连接并沿第一方向延伸的第九半圈部、自所述第九半圈部的末端向靠近所述绕线组中心的方向延伸的第三连接部以及自所述第三连接部的末端沿第一方向延伸的第十半圈部；
所述第六线圈包括沿第一方向延伸的第十一半圈部以及在所述绕线组的径向与第十一半圈部错位并沿第一方向延伸的第十二半圈部，相比所述第十一半圈部，所述第十二半圈部远离所述绕线组中心，所述第十一半圈部的末端与所述第十二半圈部的首端电连接，所述第十二半圈部的末端与所述第三半圈部的首端连接；
在第一方向上，所述第九半圈部的末端与所述第十二半圈部的首端相对，所述第十一半圈部的末端与所述第十半圈部的首端相对；所述第三半圈部的首端与所述第四半圈部的尾端相对，所述第九半圈部的首端与所述第二半圈部的尾端相对且通过一沿第一方向延伸的周向连接部相连，所述第十一半圈部的首端与所述第十二半圈部的尾端相对。
5、根据权利要求4所述的线圈，其特征在于，所述第二平面绕组还包括第七线圈和第八线圈，所述第七线圈与所述第五线圈叠设，所述第八线圈与所述第六线圈叠设；
所述第七线圈包括与所述第九半圈部叠设的第十三半圈部以及与所述第十半圈部叠设的第十四半圈部；
所述第八线圈包括与所述第十一半圈部叠设的第十五半圈部、与所述第十二半圈部叠设的第十六半圈部以及连接所述第十五半圈部的末端和所述第十六半圈部的首端的第四连接部；
所述第九半圈部和所述第十三半圈部并联，所述第十半圈部和所述第十四半圈部并联，所述第十一半圈部和所述第十五半圈部并联，所述第十二半圈部和所述第十六半圈部并联；
在第一方向上，所述第十三半圈部的首端与所述六半圈部的末端相对且间隔形成一让位部，所述第十五半圈部的首端与所述第十六半圈部的末端相对，所述第十六半圈部的末端与所述第七半圈部的末端通过一跨接部连接，所述跨接部穿过所述让位部。
6、根据权利要求1所述的线圈，其特征在于，所述第一方向为顺时针方向或逆时针方向。
7、根据权利要求2所述的线圈，其特征在于，所述第一平面绕组或所述第二平面绕组的各半圈部分别包括沿第一方向延伸的切槽以及由所述切槽分隔的两个子圈部。
8、根据权利要求7所述的线圈，其特征在于，所述第一平面绕组或所述第二平面绕组的各半圈部的两个所述子圈部的线宽相同且间隔距离相同。
9、一种无线充电设备，其特征在于，该设备包括如权利要求1-8中的任意一项所述的线圈。
PCT/CN2020/117756 2020-09-11 2020-09-25 线圈和无线充电设备 Ceased WO2022052183A1 (zh)

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