CN112185660B - Coil and wireless charging device - Google Patents
Coil and wireless charging device Download PDFInfo
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- CN112185660B CN112185660B CN202010953566.1A CN202010953566A CN112185660B CN 112185660 B CN112185660 B CN 112185660B CN 202010953566 A CN202010953566 A CN 202010953566A CN 112185660 B CN112185660 B CN 112185660B
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- 238000004804 winding Methods 0.000 claims abstract description 91
- 238000005452 bending Methods 0.000 claims description 39
- 238000002360 preparation method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- 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
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- 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
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- 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
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- 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
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- 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
Abstract
The invention provides a coil and wireless charging equipment, wherein the coil comprises a first wire end, a second wire end and a winding group for connecting the first wire end and the second wire end, the winding group at least comprises a first plane winding at least comprising a first coil and a second coil which are adjacent from outside to inside, at least one first cross structure is arranged between the first coil and the second coil, in the first cross structure, two ring parts of the first coil are arranged in a cross manner, and two ring parts of the second coil are arranged in a cross manner; one of the loop portions of the first coil is disposed in the slot of the second coil and one of the loop portions of the second coil is disposed in the slot of the first coil on both sides of the first crossover structure. Through the mode, the coil and the wireless charging equipment are high in transmission efficiency.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of wireless charging, in particular to a coil and wireless charging equipment applying wireless charging.
[ background of the invention ]
The wireless charging is characterized in that the wireless charging is non-contact inductive charging based on an inductive coupling principle, energy is transferred by energy coupling through a coil, and the traditional charging power line connection is not used. With the development of wireless charging technology and the convenience brought by the charging form, more and more electronic devices support wireless charging.
However, the coil portion for energy transmission of the wireless charging device of the related art risks lowering the transmission efficiency due to the loss of the coil in resistance at the time of wireless charging, and increases the amount of heat generation. Therefore, how to improve the performance of the coil is an important technical problem for wireless charging. Among them, the level of transmission efficiency of the coil for wireless charging plays an important role in charging efficiency.
Therefore, there is a need to provide a new coil and a wireless charging device to solve the above technical problems.
[ summary of the invention ]
The invention aims to provide a coil and a wireless charging device with high transmission efficiency.
In order to achieve the above object, the present invention provides a coil, which includes a first end, a second end, and a winding group connecting the first end to the second end, wherein the winding group includes at least a first planar winding, and the first planar winding includes at least a first coil and a second coil adjacent to each other from outside to inside; the first coil is provided with a slit extending in a coil extending direction and includes two coil portions separated by the slit; the second coil is provided with a slot extending in a coil extending direction and includes two loop portions separated by the slot;
at least one first cross structure is arranged between the first coil and the second coil, in the first cross structure, two ring parts of the first coil are arranged in a cross mode, and two ring parts of the second coil are arranged in a cross mode;
one of the loop portions of the first coil is disposed in the slot of the second coil and one of the loop portions of the second coil is disposed in the slot of the first coil on both sides of the first crossover structure.
Preferably, the winding group further comprises at least a second planar winding stacked with the first planar winding, and the second planar winding at least comprises a third coil and a fourth coil which are adjacent from outside to inside; the third coil is provided with a slit extending in a coil extending direction and includes two coil portions separated by the slit; the fourth coil is provided with a slit extending in a coil extending direction and includes two coil portions separated by the slit;
at least one second cross structure is arranged between the third coil and the fourth coil, and in the second cross structure, two coil parts of the third coil are arranged in a cross mode, and two coil parts of the fourth coil are arranged in a cross mode;
one of the loop portions of the third coil is disposed in the slot of the fourth coil and one of the loop portions of the fourth coil is disposed in the slot of the third coil on both sides of the second crossover structure;
the two ring parts of the third coil and the two ring parts of the first coil are oppositely stacked and connected in parallel; the two ring parts of the fourth coil and the two ring parts of the second coil are oppositely overlapped and connected in parallel.
Preferably, one of the loop portions of the first coil is provided with a yielding portion, and the other loop portion is provided with a bending portion, and the bending portion of the first coil passes through the yielding portion of the first coil;
one of the ring parts of the second coil is provided with a position yielding part, the other ring part of the second coil is provided with a bending part, and the bending part of the second coil penetrates through the position yielding part of the second coil;
one ring part of the third coil is provided with a yielding part, the other ring part of the third coil is provided with a bending part, and the bending part of the third coil penetrates through the yielding part of the third coil;
one of the ring parts of the fourth coil is provided with a position yielding part, the other ring part is provided with a bending part, and the bending part of the fourth coil penetrates through the position yielding part of the fourth coil.
Preferably, the first and second liquid crystal materials are,
the winding group comprises a third cross structure, and the third cross structure comprises the first cross structure and the second cross structure which are overlapped;
the bending part of the first coil and the bending part of the third coil are overlapped in a crossed mode, and the bending part of the second coil and the bending part of the fourth coil are overlapped in a crossed mode.
Preferably, two sides of the loop part of the first coil, which are close to the carry-out part, are connected in parallel with two sides of the loop part of the third coil, which are close to the bending part, through metalized through holes;
two sides of the ring part of the first coil, which are close to the bending part, are connected in parallel with two sides of the ring part of the third coil, which are close to the avoiding part, through metalized through holes;
two sides of the ring part of the second coil, which are close to the relief part, are connected in parallel with two sides of the ring part of the fourth coil, which are close to the bending part, through metalized through holes;
and two sides of the ring part of the second coil, which are close to the bending part, and two sides of the ring part of the fourth coil, which are close to the position yielding part, are connected in parallel through metallized through holes.
Preferably, the first planar winding further comprises a fifth coil adjacent to the second coil, the fifth coil being provided with a slot extending in a coil extending direction and comprising two coil portions separated by the slot;
in the extending direction of the coil, the tail end of the second coil close to the outer ring part is opposite to the head end of the first coil close to the inner ring part, the tail end of the first coil close to the inner ring part is opposite to the head end of the second coil close to the inner ring part, the tail end of the second coil close to the inner ring part is opposite to the head end of the fifth coil close to the outer ring part, and the tail end of the second coil close to the outer ring part is connected with the head end of the fifth coil close to the outer ring part through a bridging part;
the tail end of the ring part close to the inner side of the first coil and the head end of the ring part close to the inner side of the second coil are separated to form a position-avoiding part, and the bridging part penetrates through the position-avoiding part.
Preferably, the second planar winding further includes a sixth coil adjacent to the fourth coil, the sixth coil being provided with a slit extending in a coil extending direction and including two coil portions separated by the slit;
in the extending direction of the coil, the tail end of the ring part close to the outer side of the fourth coil is opposite to the head end of the ring part close to the inner side of the third coil, the tail end of the ring part close to the inner side of the sixth coil is opposite to the head end of the ring part close to the inner side of the fourth coil, the tail end of the ring part close to the inner side of the fourth coil is opposite to the head end of the ring part close to the outer side of the sixth coil, and the tail end of the ring part close to the inner side of the third coil is connected with the head end of the ring part close to the inner side of the fourth coil through a connecting part;
the tail end that the fourth coil is close to the circle portion in the outside pass through the via hole with the second coil is close to the end connection of outside circle portion, the head end that the sixth coil is close to the circle portion in the outside pass through the via hole with the head end that the fifth coil is close to the circle portion in the outside is connected, the tail end that the third coil is close to inboard circle portion pass through the via hole with the first coil is close to the end connection of inboard circle portion, the head end that the fourth coil is close to inboard circle portion pass through the via hole with the second coil is close to the head end of inboard circle portion and is connected.
Preferably, the first ends of the two coil portions of the first coil or the third coil are connected by a crossover portion.
Preferably, the first wire end is connected to a head end of the first coil or the third coil.
The invention also provides a wireless charging device comprising a coil as described in any of the above.
The invention has the beneficial effects that: according to the coil and the wireless charging equipment, the crossing structure is arranged in the two adjacent turns of the coil, and two currents of each turn are crossed in the crossing structure, so that the length of the inner circle part and the length of the outer circle part in each turn of the coil can be kept consistent, the current distribution of the coil is more uniform, the alternating current resistance and the direct current resistance are both smaller, the magnetic field distribution is more uniform, and the transmission efficiency of the coil and the wireless charging equipment is higher.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic perspective view of a coil according to the present invention;
FIG. 2 is an exploded view of a portion of the coil of the present invention;
FIG. 3 is an enlarged view of portion M of FIG. 1;
FIG. 4 is an enlarged view of portion P of FIG. 2;
FIG. 5 is an enlarged view of portion p' of FIG. 2;
FIG. 6 is an enlarged view of portion N of FIG. 1;
FIG. 7 is an enlarged view of portion Q of FIG. 2;
FIG. 8 is an enlarged view of the portion Q' in FIG. 2
Description of the drawings: a coil 100; a first terminal 1; a second wire end 2; a winding group 3; a first planar winding T3; a first coil T31; the second coil T32; a fifth coil T33; a seventh coil T34; the nth coil T3 n; a second planar winding B3; a third coil B31; a fourth coil B32; the sixth coil B33; the eighth coil B34; the m-th coil B3 m; a loop portion a; cutting a groove b; a first crossover structure A; a second cross structure B; a third cross structure C; a relief portion 4; a bending section 5; a bridge portion 6; an outlet section 7; a connecting portion 8; and a via 9.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides a coil 100.
The coil 100 includes a first wire end 1, a second wire end 2, and a winding group 3 connecting the first wire end 1 to the second wire end 2.
In the present embodiment, the first wire end 1 is an input port of the coil 100.
The second end 2 is an output port of the coil 100. Of course, the first wire end 1 and the second wire end 2 may be interchanged, i.e. the first wire end 1 is an output port of the coil 100; it is also possible that the second end 2 is an input port of the coil 100.
In the present embodiment, the winding group 3 includes a first planar winding T3 and a second planar winding B3 stacked, and the first planar winding T3 and the second planar winding B3 are both made by concentrically and spirally winding in a clockwise or counterclockwise direction. It should be noted that the present application is not limited to the two-layer planar winding included in the coil, and the coil may be a multi-layer planar winding or a single-layer planar winding according to the requirement.
The first planar winding T3 includes a first coil T31, a second coil T32, a fifth coil T33, a seventh coil T34, … …, and an nth coil T3n (where the first and second … … nth before the coil only represent the name of the coil, and do not limit the number of turns of the coil). Each turn of the coil is provided with a slot b extending in the coil extension direction, and each turn of the coil comprises two loop portions b separated by the slot b. For example, the first coil T31 includes two loop portions a separated by a slot b, the second coil T32 includes two loop portions a separated by a slot b, the fifth coil T33 includes two loop portions a separated by a slot b, the seventh coil T34 includes two loop portions a, … … separated by a slot b, and the nth coil T3n includes two loop portions a separated by a slot c. The first planar winding T3 shown in the embodiment of the present invention includes 11 turns of coil.
Two adjacent turns of coils of the first planar winding T3 from outside to inside form a group, and at least one first cross structure A is arranged between the two turns of coils of each group of coils. In the first cross structure a, there is a cross arrangement between the two coil portions of each turn of coil, that is, there is an overlapping portion of the projection of the two coil portions of each turn of coil on the plane where the first plane winding T3 is located. In the embodiment of the present invention, taking the first coil T31 and the second coil T32 as an example, the two loop portions a of the first coil T31 cross each other and the two loop portions a of the second coil T32 cross each other. On both sides of the first cross structure A, one loop part of one loop coil in each group of coils is arranged in the cutting groove b of the other loop coil. In the embodiment of the present invention, taking the first coil T31 and the second coil T32 as an example, on the side of the first cross structure a, one loop portion a of the first coil T31 is disposed in the slot b of the second coil T32, and one loop portion a of the second coil T32 is disposed in the slot b of the first coil T31; on the other side of the first cross structure a, the other loop portion a of the first coil T31 is disposed in the slot b of the second coil T32, and the other loop portion a of the second coil T32 is disposed in the slot b of the first coil T31.
The second planar winding B3 includes a third coil B31, a fourth coil B32, a sixth coil B33, eighth coils B34, … …, and an m-th coil B3m (here, the third and fourth coils … … m before the coil only represent the name of the coil, and do not limit the number of turns of the coil). Each turn of the coil is provided with a slot b extending in the coil extending direction, and each turn of the coil comprises two ring portions a separated by the slot b. For example, the third coil B31 includes two loop portions a separated by a slot B, the fourth coil B32 includes two loop portions a separated by a slot B, the sixth coil B33 includes two loop portions a separated by a slot B, the eighth coil B34 includes two loop portions a, … … separated by a slot B, and the mth coil B3m includes two loop portions a separated by a slot B. The second planar winding B3 shown in the embodiment of the present invention also includes 11 turns of coil.
And two adjacent turns of coils of the second planar winding B3 from outside to inside form a group, and each group of coils has at least one second cross structure B. In the second cross structure B, two coil parts of each coil turn are crossed, that is, projections of the two coil parts of each coil turn in a plane where the second planar winding B3 is located have an overlapped part. In the embodiment of the present invention, taking the third coil B31 and the fourth coil B32 as an example, the two coil portions a of the third coil B31 cross each other, and the two coil portions a of the fourth coil B32 cross each other. And on two sides of the second cross structure B, one ring part of one coil in each group of coils is arranged in the cutting groove B of the other coil. In the embodiment of the present invention, taking third coil B31 and fourth coil B32 as an example, on the side of second crossover structure B, one ring portion a of third coil B31 is disposed in slot B of fourth coil B32, and one ring portion a of fourth coil B32 is disposed in slot B of third coil B31; on the other side of the second crossover structure B, the other loop portion a of the third coil B31 is disposed in the slot B of the fourth coil B32, and the other loop portion a of the fourth coil B32 is disposed in the slot B of the third coil B31.
The first cross structure A of the first planar winding T3 and the second cross structure B of the second planar winding B3 are oppositely overlapped; except where the first cross structure a and the second cross structure B are stacked, each coil turn is stacked opposite to both coil portions of the first planar winding T3 and both coil portions of the second planar winding B3.
And the first plane winding T3 and the second plane winding B3 are connected in parallel between the oppositely overlapped ring parts. Specifically, two coils of the first coil T31 of the first planar winding T3 and the second coil B31 of the second planar winding B3 are stacked and connected in parallel. Specifically, the stacked turns of the first planar winding T3 and the second planar winding B3 may be connected in parallel by the metalized vias 9.
According to the coil provided by the embodiment of the invention, two turns of coils in each group of coils comprise the cross structure (the first cross structure A or the second cross structure B), and two currents of each turn are subjected to cross treatment in the cross structure. However, the exception is that when the total number of turns of the coil is odd, the two currents of the innermost turn of the coil are also arranged in a crossed manner, but are not arranged in a staggered manner with the other turns of the coil.
Based on the above, for each turn of the winding group 3, it includes two turns of the first planar winding T3 (e.g. the two turns a of the first winding T31) and two turns of the second planar winding B3 (e.g. the two turns a of the third winding B31), that is, each turn of the coil includes four turns. In each plane winding, every two turns of coils form a group from the outermost side to the innermost side.
In an alternative embodiment, a third cross structure C is further provided in each group of coils, as shown in fig. 3 to 5, and in the winding group 3 provided in the embodiment of the present invention, each third cross structure C includes a first cross structure a and a second cross structure B that are stacked. In each third crossing structure C, one loop portion a of each turn of coil is provided with a relief portion 4, the other loop portion a of the turn of coil is correspondingly provided with a bending portion 5, and the bending portion 5 of the turn of coil passes through the relief portion 4 so that the two loop portions are crossed; for a single coil overlapped with the single coil, one coil part a provided with the positioning part 4 is overlapped with one coil part a provided with the bending part 5 of the single coil, and the other coil part a provided with the bending part 5 is overlapped with one coil part a provided with the positioning part 4 of the single coil. For example, the first coil T31 has the positioning portion 4 near the outer coil portion a, and the folded portion 5 near the inner coil portion, and the folded portion 5 of the first coil T31 passes through the positioning portion 4; in third coil B31 stacked opposite to first coil T31, third coil B31 is provided with a bent portion 5 near the outer ring portion a, a relief portion 4 near the inner ring portion a, bent portion 5 of third coil B31 passes through relief portion 4, and relief portion 4 of third coil B31 is stacked corresponding to bent portion 5 of first coil T31, and bent portion 5 of third coil B31 is stacked corresponding to relief portion 4 of first coil T31, so that bent portion 5 of third coil B31 and bent portion 5 of first coil T31 are disposed in a crossing manner. For example, the second coil T32 has a space portion 4 near the outer loop portion a, and a folded portion 5 near the inner loop portion, and the folded portion 5 of the second coil T32 passes through the space portion 4; in the fourth coil B32 stacked opposite to the second coil T32, the fourth coil B32 is provided with a bent portion 5 near the outer ring portion a, a relief portion 4 near the inner ring portion a, the bent portion 5 of the fourth coil B32 passes through the relief portion 4, the relief portion 4 of the fourth coil B32 and the bent portion 5 of the second coil T32 are stacked correspondingly, and the bent portion 5 of the fourth coil B32 and the relief portion 4 of the second coil T32 are stacked correspondingly, so that the bent portion 5 of the fourth coil B32 and the bent portion 5 of the second coil T32 are disposed in a crossing manner.
In an alternative embodiment, referring to fig. 3-5, vias are provided on both sides of the third cross structure C, where the loop portion a of each turn of coil is close to the carry-over portion 4 and the bending portion 5, and the stacked loop portions are connected in parallel through the metalized vias 9. In the first coil T31, one loop portion a is provided with two through holes 9 on both sides near the leaving portion 4, and the other loop portion a is provided with two through holes 9 on both sides near the folded portion 5; in the third coil B31, one loop portion a is provided with two via holes 9 on both sides near the positioning portion 4, and the other loop portion a is provided with two via holes 9 on both sides near the bending portion 5; the first coil T31 and the third coil B31 which are stacked are connected in parallel through a metalized via 9, and similarly, the second coil T32 and the fourth coil B32 are connected in parallel through a metalized via 9.
Further, in each planar winding, in the extending direction of the coil, except for the innermost strand of the coil, the tail end of each strand of the coil is opposite to the head end of the inner strand of the coil. From the outermost side to the innermost side of the coil, every two turns of the coil form a group, for one turn part of each turn of the coil close to the outer side, the tail end of the coil of the outer side in each group is opposite to the head end of the coil of the inner side, and the opposite head and tail ends can be connected through a connecting part; the tail end of one turn coil at the inner side of each group is separated from the head end of one turn coil adjacent to the inner side of the group by a slot, and the separated head end and the separated tail end can be connected through a bridging part. Similarly, from the outermost side to the innermost side of the coil, every two turns of the coil form a group, and for one turn part of each turn of the coil close to the inner side, the tail end of the outer turn of the coil in each group is opposite to the head end of the inner turn of the coil, and the opposite head ends and the tail ends can be connected through a connecting part; the tail end of one turn coil at the inner side of each group is separated from the head end of one turn coil adjacent to the inner side of the group by a slot, and the separated head end and the separated tail end can be connected through a bridging part. In a certain plane winding, when the head end and the tail end of two adjacent turns of coils are connected through the bridging part, the connecting part is not arranged in the cutting groove where the bridging part is located to form a yielding part for avoiding the bridging part, in the other plane winding, the connecting part is arranged in the cutting groove corresponding to the bridging part, the head ends of the same turns of coils of the two plane windings are connected through the via hole, and the tail ends of the same turns of coils are connected through the via hole. Referring to fig. 3 to 8, for example, in the extending direction of the coil, the tail end of the second coil T32 close to the outer ring portion a of the first planar winding T3 is opposite to the head end of the first coil T31 close to the inner ring portion a, the tail end of the first coil T31 close to the inner ring portion a is opposite to the head end of the second coil T32 close to the inner ring portion a, the tail end of the second coil T32 close to the inner ring portion a is opposite to the head end of the fifth coil T33 close to the outer ring portion a, the tail end of the second coil T32 close to the outer ring portion a is connected to the head end of the fifth coil T33 close to the outer ring portion a through a bridging portion 6, the tail end of the first coil T31 close to the inner ring portion a and the head end of the second coil T32 close to the inner ring portion a are spaced to form a bridging portion 4, and the bridging portion 6 passes through the bridging portion 4. In the extending direction of the coils, the tail end of the fourth coil B32 close to the outer side of the second planar winding B3 is opposite to the head end of the third coil B31 close to the inner side of the coil a, the tail end of the third coil B31 close to the inner side of the coil a is opposite to the head end of the fourth coil B32 close to the inner side of the coil a, the tail end of the fourth coil B32 close to the inner side of the coil a is opposite to the head end of the sixth coil B33 close to the outer side of the coil a, and the tail end of the third coil B31 close to the inner side of the coil a is connected with the head end of the fourth coil B32 close to the inner side of the coil a through a connecting part 8; the tail end of the outer-side ring part a of the fourth coil B32 of the second planar winding B3 is connected with the tail end of the outer-side ring part a of the second coil T32 of the first planar winding T3 through a through hole 9, and the head end of the outer-side ring part a of the sixth coil B33 of the second planar winding B3 is connected with the head end of the outer-side ring part a of the fifth coil T33 of the first planar winding T3 through the through hole 9; the tail end of the inner-side ring part a of the third coil B31 of the second planar winding B3 is connected with the tail end of the inner-side ring part a of the first coil T31 of the first planar winding T3 through a via hole 9, and the head end of the inner-side ring part a of the fourth coil B32 of the second planar winding B3 is connected with the head end of the inner-side ring part a of the second coil T32 of the first planar winding T3 through a via hole 9.
In this embodiment, referring to fig. 6 to 8, a head end of the first coil T31 of the first planar winding T3 near the outer one of the coil portions a and a head end of the first coil T31 near the inner other one of the coil portions a are connected by a bridge portion 6, and the carry portion 4 is formed at a position corresponding to the bridge portion 6. In other embodiments, the two coil portions a of the third coil B31 may be connected to the second planar winding B3 by the connection portion 8.
In this embodiment, referring to fig. 6 to 8, the first terminal 1 is connected to the head end of the outer coil portion a of the first coil T31 of the first planar winding T3. In other embodiments, the first wire end 1 may be connected to the head end of the third coil B31 of the second planar winding B3 near the outer coil portion a.
In this embodiment, the outer and inner coil portions of the coils of the first and second planar windings T3 and B3 have the same line width and the same spacing distance. Of course, without limitation, the line widths may be different, for example, the line width may be smaller from the outer turn to the inner turn.
In this embodiment, referring to fig. 6-8, in order to make the first end 1 and the second end 2 located outside the winding group 3 in parallel, and to better route the wire and not affect the electrical performance, the coil 100 further includes a wire outgoing section 7 connecting the second end 2 to the tail ends of the two coils of the innermost coil (the tail end of the two coils of the n-th coil T3n or the tail end of the two coils of the m-th coil B3 m). The outlet section 7 extends in the radial direction of the winding group 3. Specifically, the outlet line segment 7 extends from the tail end of the inner-side loop portion of the nth turn coil T3n to the outer-side loop portion of the first coil T31 to be connected to the second line end 2.
In the present embodiment, the outlet section 7 extends in the radial direction of the winding group 3. One part of the outlet section 7 is located on the plane where the first planar winding T3 is located, the other part of the outlet section 7 is located on the plane where the second planar winding B3 is located, and the two parts are connected through a through hole.
Of course, the outlet section 7 may also be provided with various outlet ways without being limited thereto. The outlet section 7 may also be located in only one of the planar windings, such as the plane of the first planar winding T3 or the plane of the second planar winding B3.
In the embodiment of the present invention, the winding group 3 composed of 4 strands and 11 turns has an inductance of about 5uH and an inductance ac resistance of <190mohm through tests under the conditions that the inner diameter of the coil is 20mm, the outer diameter is 48mm, the yield of the wire pitch is controlled to reach the level of mass production, and the copper thickness is 2Oz, and thus, the inductance value and the resistance value of the coil 100 are smaller and lower than those of the coil of the conventional structure, which can show that the transmission efficiency of the coil 100 of the present invention is high.
The present invention also provides a wireless charging device comprising the coil 100.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A coil comprises a first wire end, a second wire end and a winding group connecting the first wire end to the second wire end, wherein the winding group at least comprises a first plane winding, and the first plane winding at least comprises a first coil and a second coil which are adjacent from outside to inside; the first coil is provided with a slit extending in a coil extending direction and includes two coil portions separated by the slit; the second coil is provided with a slot extending in a coil extending direction and includes two loop portions separated by the slot; it is characterized in that the preparation method is characterized in that,
at least one first cross structure is arranged between the first coil and the second coil, in the first cross structure, two ring parts of the first coil are arranged in a cross mode, and two ring parts of the second coil are arranged in a cross mode;
one of the loop portions of the first coil is disposed in the slot of the second coil and one of the loop portions of the second coil is disposed in the slot of the first coil on both sides of the first crossover structure.
2. The coil of claim 1, wherein the winding groups further comprise at least a second planar winding stacked on the first planar winding, the second planar winding comprising at least a third coil and a fourth coil adjacent to each other from outside to inside; the third coil is provided with a slit extending in a coil extending direction and includes two coil portions separated by the slit; the fourth coil is provided with a slit extending in a coil extending direction and includes two coil portions separated by the slit;
at least one second cross structure is arranged between the third coil and the fourth coil, and in the second cross structure, two coil parts of the third coil are arranged in a cross mode, and two coil parts of the fourth coil are arranged in a cross mode;
one of the loop portions of the third coil is disposed in the slot of the fourth coil and one of the loop portions of the fourth coil is disposed in the slot of the third coil on both sides of the second crossover structure;
the two ring parts of the third coil and the two ring parts of the first coil are oppositely overlapped and connected in parallel; the two ring parts of the fourth coil and the two ring parts of the third coil are oppositely stacked and connected in parallel.
3. The coil of claim 2,
one ring part of the first coil is provided with a yielding part, the other ring part of the first coil is provided with a bending part, and the bending part of the first coil penetrates through the yielding part of the first coil;
one ring part of the second coil is provided with a position yielding part, the other ring part of the second coil is provided with a bending part, and the bending part of the second coil penetrates through the position yielding part of the second coil;
one ring part of the third coil is provided with a yielding part, the other ring part of the third coil is provided with a bending part, and the bending part of the third coil penetrates through the yielding part of the third coil;
one of the ring parts of the fourth coil is provided with a position yielding part, the other ring part is provided with a bending part, and the bending part of the fourth coil penetrates through the position yielding part of the fourth coil.
4. The coil of claim 3,
the winding group comprises a third cross structure, and the third cross structure comprises the first cross structure and the second cross structure which are overlapped;
the bending part of the first coil and the bending part of the third coil are crossed and overlapped, and the bending part of the second coil and the bending part of the fourth coil are crossed and overlapped.
5. The coil of claim 4,
two sides of the ring part of the first coil, which are close to the positioning part, are connected in parallel with two sides of the ring part of the third coil, which are close to the bending part, through metalized through holes;
two sides of the ring part of the first coil, which are close to the bending part, are connected in parallel with two sides of the ring part of the third coil, which are close to the position yielding part, through metalized through holes;
two sides of the ring part of the second coil, which are close to the relief part, are connected in parallel with two sides of the ring part of the fourth coil, which are close to the bending part, through metalized through holes;
and two sides of the ring part of the second coil, which are close to the bending part, and two sides of the ring part of the fourth coil, which are close to the position yielding part, are connected in parallel through metallized through holes.
6. The coil of claim 2, wherein the first planar winding further comprises a fifth coil adjacent to the second coil, the fifth coil being provided with a slot extending in a coil extension direction and comprising two loop portions separated by the slot;
in the extending direction of the coil, the tail end of the ring part close to the outer side of the second coil is opposite to the head end of the ring part close to the inner side of the first coil, the tail end of the ring part close to the inner side of the first coil is opposite to the head end of the ring part close to the inner side of the second coil, the tail end of the ring part close to the inner side of the second coil is opposite to the head end of the ring part close to the outer side of the fifth coil, and the tail end of the ring part close to the outer side of the second coil is connected with the head end of the ring part close to the outer side of the fifth coil through a bridging part;
the tail end of the ring part close to the inner side of the first coil and the head end of the ring part close to the inner side of the second coil are separated to form a position-avoiding part, and the bridging part penetrates through the position-avoiding part.
7. The coil of claim 6,
the second planar winding further comprises a sixth coil adjacent to the fourth coil, the sixth coil being provided with a slot extending in a coil extension direction and comprising two coil portions separated by the slot;
in the extending direction of the coil, the tail end of the ring part close to the outer side of the fourth coil is opposite to the head end of the ring part close to the inner side of the third coil, the tail end of the ring part close to the inner side of the sixth coil is opposite to the head end of the ring part close to the inner side of the fourth coil, the tail end of the ring part close to the inner side of the fourth coil is opposite to the head end of the ring part close to the outer side of the sixth coil, and the tail end of the ring part close to the inner side of the third coil is connected with the head end of the ring part close to the inner side of the fourth coil through a connecting part;
the tail end that the fourth coil is close to the circle portion in the outside pass through the via hole with the second coil is close to the end connection of outside circle portion, the head end that the sixth coil is close to the circle portion in the outside pass through the via hole with the head end that the fifth coil is close to the circle portion in the outside is connected, the tail end that the third coil is close to inboard circle portion pass through the via hole with the first coil is close to the end connection of inboard circle portion, the head end that the fourth coil is close to inboard circle portion pass through the via hole with the second coil is close to the head end of inboard circle portion and is connected.
8. A coil according to claim 2, wherein the head ends of the two coil portions of the first coil or the third coil are connected by a crossover.
9. A coil according to claim 2, wherein the first wire end is connected to a head end of the first coil or the third coil.
10. A wireless charging device, characterized in that the device comprises a coil according to any of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010953566.1A CN112185660B (en) | 2020-09-11 | 2020-09-11 | Coil and wireless charging device |
| PCT/CN2020/118223 WO2022052188A1 (en) | 2020-09-11 | 2020-09-28 | Coil and wireless charging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010953566.1A CN112185660B (en) | 2020-09-11 | 2020-09-11 | Coil and wireless charging device |
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| Publication Number | Publication Date |
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| CN112185660A CN112185660A (en) | 2021-01-05 |
| CN112185660B true CN112185660B (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010953566.1A Active CN112185660B (en) | 2020-09-11 | 2020-09-11 | Coil and wireless charging device |
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| WO (1) | WO2022052188A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10504648B2 (en) * | 2016-12-20 | 2019-12-10 | Amotech Co., Ltd. | Antenna for wireless power transmission |
| CN108565102B (en) * | 2018-03-28 | 2020-08-14 | 华为技术有限公司 | Coil module, wireless charging transmitting device, wireless charging receiving device, wireless charging system and wireless charging terminal |
| CN208337243U (en) * | 2018-07-19 | 2019-01-04 | 深圳市信维通信股份有限公司 | A kind of Wiring structure of wireless charging transmitter |
| CN208522543U (en) * | 2018-07-24 | 2019-02-19 | 昆山联滔电子有限公司 | Wireless charging electric wire coil apparatus |
| CN109961942B (en) * | 2018-08-04 | 2020-06-16 | 华为技术有限公司 | Coil module, wireless charging transmitting device, wireless charging receiving device, wireless charging system and wireless charging terminal |
| US10778176B2 (en) * | 2018-11-29 | 2020-09-15 | Raytheon Company | CMOS Guanella balun |
| CN109887724B (en) * | 2019-02-28 | 2021-10-01 | 华为技术有限公司 | Coil module, wireless charging transmitting and receiving device, system and mobile terminal |
| CN110289156B (en) * | 2019-05-24 | 2020-11-10 | 华为技术有限公司 | Coil winding, coil module, transmitting device, receiving device, system and terminal |
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| WO2022052188A1 (en) | 2022-03-17 |
| CN112185660A (en) | 2021-01-05 |
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