CN213070856U - Coil assembly and terminal - Google Patents

Abstract

The disclosed embodiment is a coil assembly and a terminal; the coil assembly includes at least: a first coil and a second coil; the second coil is laminated on the first coil; the winding directions of the second coil and the first coil are the same, and the nth turn of the first coil and the mth turn of the second coil are connected in parallel through a through hole; wherein the nth turn of the first coil is aligned with the mth turn in the second coil; the n and the m are integers greater than or equal to 1. Therefore, the first coil and the second coil can be connected in parallel, so that the impedance of the coil assembly is greatly reduced, and the heat generation of the coil assembly is reduced.

Description

Coil assembly and terminal

Technical Field

The utility model relates to a wireless technical field that charges especially relates to a coil pack and terminal.

Background

With the development of the related art, more and more devices are applied to the coil. For example, in terms of wireless charging technology, many wearable devices and smart terminals begin to utilize coils for wireless charging. The loss of the coil directly affects the charging performance.

For a coil formed by winding a single wire, the current is distributed at the boundary of the cross section of the wire, and the phenomenon is a skin effect. This phenomenon will greatly increase the impedance of the coil, resulting in more severe heating of the coil.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a coil and a terminal.

In a first aspect of the present disclosure, there is provided a coil component comprising at least:

a first coil and a second coil;

the second coil is laminated on the first coil; the winding directions of the second coil and the first coil are the same, the nth turn of the first coil and the mth turn of the second coil are connected in parallel through a through hole, and the nth turn of the first coil is aligned with the mth turn of the second coil; wherein n and m are integers greater than or equal to 1.

In the scheme, the first coil and the second coil are wound into N turns from outside to inside one by one according to the direction of current flowing into and flowing out of the first coil and the second coil; n is an integer greater than or equal to 1, and N and m are both less than or equal to N.

In the above scheme, the first coil has at least one break, and the wire outlet end of the wire, through which current flows out, is located in the break.

In the above scheme, the connection between the nth turn of the first coil and the mth turn of the second coil includes at least two positions, which are respectively located at two sides of the fracture of the first coil.

In the above scheme, the leads forming the first coil and the second coil are P strands; wherein, P is an integer greater than 1;

the ith strand of the nth turn of the first coil and the ith strand of the mth turn of the second coil are connected in parallel through a through hole; wherein i is an integer of 1 or more and less than P.

In the above scheme, the length difference between any two of the P strands of the conductive wires is within a predetermined length range.

In the above scheme, the P strands of the wires include: p1, P2 and P3; wherein the P1 strands are located inboard of the P2 strands, and the P3 strands are located outboard of the P2 strands;

the length of the outlet end from which the P1 strands of power current flows out is greater than that of the outlet end from which the P2 strands of power current flows out, and the length of the outlet end from which the P3 strands of power current flows out is less than that of the outlet end from which the P2 strands of power current flows out.

In the above scheme, an included angle between a tangent of the tail end of the (n-1) th turn of the first coil and a tangent of the head end of the nth turn is greater than a predetermined angle.

In the above scheme, the fracture is formed between the tail end of the n-1 th turn of the first coil and the head end of the nth turn;

or,

the tail end of the (n-1) th turn of the first coil and the head end of the (n) th turn are connected into an arc line.

According to a second aspect of the present disclosure, there is provided a terminal comprising the coil assembly of any embodiment of the present disclosure.

In the foregoing solution, the terminal further includes: a housing;

the coil assembly is located in a footprint of a non-metallic plate within the housing.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the coil component of the disclosed embodiment at least includes: a first coil and a second coil; the second coil is laminated on the first coil; the winding direction of the second coil is the same as that of the first coil, and the nth turn of the first coil is connected with the mth turn of the second coil in parallel through the through hole. Thus, the first coil and the second coil can be connected in parallel, so that the impedance of the coil assembly is greatly reduced, and the heat generation of the coil assembly is greatly reduced.

In addition, the winding directions of the first coil and the second coil are the same, so that a novel winding mode of parallel coils is provided on one hand; on the other hand, the current directions of the first coil and the second coil which are connected in parallel are consistent, so that compared with the situation that if the current directions of the first coil and the second coil are opposite, a part of current can flow from the nth turn to the (n + 1) th turn in the opposite direction, the current loss can be reduced, and further the heat generation of the coil assembly can be reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram illustrating a single-layer coil in accordance with an exemplary embodiment.

FIG. 2 is a schematic diagram illustrating a current distribution of a single-layer coil according to an exemplary embodiment.

FIG. 3 is a schematic diagram illustrating a plurality of coils according to an exemplary embodiment.

FIG. 4 is a graph illustrating the total impedance of a plurality of coils according to an exemplary embodiment.

Fig. 5 is a schematic diagram of a coil assembly shown in accordance with an exemplary embodiment.

Fig. 6 is a schematic diagram of a coil assembly shown in accordance with an exemplary embodiment.

Fig. 7 is a schematic diagram illustrating a current distribution of a coil assembly according to an exemplary embodiment.

Fig. 8 is a diagram illustrating the total impedance of a coil assembly, according to an exemplary embodiment.

Fig. 9 is a schematic diagram of a coil assembly shown in accordance with an exemplary embodiment.

Fig. 10 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 11 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 12 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 13 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 14 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 15 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 16 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 17 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Fig. 18 is a schematic diagram illustrating a coil assembly including a multi-strand wire according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

It should be noted that, without conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other, and the detailed description in the specific embodiments should be understood as an explanation of the gist of the present disclosure and should not be construed as an undue limitation of the present disclosure.

A single-layer coil formed by winding a single wire is shown in fig. 1; the coil is formed by winding a conducting wire, and the coil is a layer coil comprising a plurality of turns. The current distribution of the single-layer coil is shown in fig. 2, for example, at the boundary 10 of the wire cross section; the induced electromotive force current on the surface of the wire of the coil is large, and the current actually flowing through the wire is small, so that the impedance of the entire coil increases.

As shown in fig. 3, the coil assembly comprising a plurality of layers of coils is formed by winding a single wire, wherein each layer of coils comprises a plurality of turns, however, since the coil assembly is wound by a single wire, the circuit connection between each layer of coils is in series connection, so that the total impedance of the coil assembly of the structure is the sum of the impedances of the series connection of the plurality of layers of coils. For example, as shown in fig. 4, the impedances of the coils connected in series are R1, R2, R3 and R4, respectively, and the total impedance of the coils connected in series is: r1+ R2+ R3+ R4; this also causes the impedance of the entire coil to increase significantly.

In an embodiment of the present disclosure, there is provided a coil component, as shown in fig. 5 and 6, the coil component 20 includes:

a first coil 201 and a second coil 202;

the second coil 202 is laminated on the first coil 201; the winding direction of the second coil 202 is the same as that of the first coil 201, and the nth turn of the first coil 202 is connected with the mth turn of the second coil 201 in parallel through a through hole; wherein the nth turn of the first coil is aligned with the mth turn in the second coil; the n and the m are integers greater than or equal to 1.

In one embodiment, the number of turns of the first coil and the second coil may be different, and in this case, the parallel connection between the first coil and the second coil may be established in the form of a via hole with a partial number of turns in the first coil and a partial number of turns in the second coil. In this case, n and m may be equal or different.

The via hole can be a through hole or a perforation in other embodiments, and only needs to form a hole on the two turns of the coil and fill the hole with a conductor.

In one application scenario, the coil on the upper layer of the coil assembly shown in fig. 5 is a first coil, the coil assembly shown in fig. 6 is a back view of the coil assembly shown in fig. 5, and the coil on the upper layer of the coil assembly shown in fig. 6 is a second layer coil. Of course, in other application scenarios, the upper and lower relationships of the first coil and the second coil may be interchanged, and the first coil and the second coil depicted in fig. 5 and 6 are merely exemplary and not limiting.

In one embodiment, the first coil and the second coil are both N turns; and if the first coil and the second coil are both N turns, N and m can be equal, and the impedance of the coils can be reduced as much as possible due to the fact that the resistances of the first coil and the second coil are close to each other.

The resistance of the two-turn coil connected in parallel is small relative to the resistance of any one single-turn coil. For example, the 2 nd turn of the first coil and the 2 nd turn of the second coil are connected in parallel through via holes, wherein the number of the via holes is three, and the 2 nd turn of the first coil and the 2 nd turn of the second coil are divided into 4 sections; each segment of the coil in the 2 nd turn of the first coil and the 2 nd turn of the second coil is R, and then the total resistance of the 2 nd turn of the first coil and the 2 nd turn of the second coil is:

the resistance of the 2 nd turn of any individual first coil or the 2 nd turn of the second coil is 4R. Therefore, after the two turns of coils are connected in parallel, the heat value and the power consumption of the self heating of the large resistor during working can be reduced.

In one embodiment, the first coil and the second coil are wound into N turns from outside to inside one by one according to the direction of current flowing in and out; wherein N and m are both less than or equal to N.

For example, as shown in fig. 5, the direction in which the current flows may be an outside-in direction. Here, the first coil and the second coil may be wound in a clockwise direction, or may be wound in a counterclockwise direction. The winding shown in fig. 5 is as follows: an outside-in reverse clock winding method.

Here, the first coil and the second coil may each be circular, square, or irregular polygonal ring shapes, etc. In one embodiment, the first coil and the second coil are disk-shaped.

Here, the radii of the turns of the first coil and the second coil increase in order from the inside to the outside.

Here, in the first coil and the second coil, a certain distance exists between every two adjacent turns. Therefore, the short circuit between the turns can be reduced, and the mutual influence of the magnetic fields generated by the turns can be reduced.

Here, one implementation manner of the first coil and the second coil being connected in parallel through a via hole is as follows: and at least one hole is punched at the position of the nth turn of the first coil corresponding to the mth turn of the second coil, and the hole can lead the first coil and the second coil to be conducted. For example, as shown in fig. 5, in the first position 221, the first coil and the second coil each have three holes punched.

In one embodiment, at least two positions of the nth turn of the first coil and the mth turn of the second coil are connected in parallel through a via hole.

For example, as shown in fig. 5, at each of the first position 221 and the second position 222, three holes are provided, and the three holes connect the first coil and the second coil in parallel. And if the nth turn of the first coil and the mth turn of the second coil are connected in parallel through the through holes at two positions, the coil section of the nth turn connected in parallel is three-section coil or the coil section of the mth turn connected in parallel is three-section coil.

And forming holes in the two turns of coils through a punching machine, and filling conductors in the holes, so that the two turns of coils are connected in parallel.

Here, the first coil and the second coil may each be one or more. For example, if the first coil and the second coil are both one, the coil assembly is a two-layer coil. For another example, if the number of the first coils is one and the number of the second coils is two, or if the number of the first coils is two and the number of the first coils is one, the coil assembly is a three-layer coil.

Here, the coil assembly may be a communication coil. For example, the coil assembly may be a wireless charging coil in a wireless charging device, which may be any device that receives or transmits wireless signals.

In the embodiment of the present disclosure, the first layer coil and the second layer coil may be connected in parallel, so that the impedance of the whole coil assembly is greatly reduced, and the heat generation of the coil assembly is greatly reduced.

For example, please refer to fig. 2 and 7; in fig. 2, a plurality of coils are connected in series, and the current is distributed over the cross-sectional area of one wire; in the embodiment of the present disclosure, after the first coil and the second coil via holes are connected in parallel, the current originally distributed in the cross-sectional area of one wire is distributed in the cross-sectional areas 10 of the two wires. Therefore, the distribution area of the current on the two leads is larger than that on one lead, so that the impedance of the whole coil assembly is greatly reduced, and the heat generation of the coil assembly can be reduced.

For another example, the coil assembly includes a first coil and a second coil; the first coil and the second coil are connected in parallel through holes at three positions to be divided into four coil sections; the impedances of the four coil segments of the first coil and the second coil are respectively: r1', R2', R3 'and R4'; as shown in fig. 8, the total impedance of the coil assembly is:

in the above example, if the first coil and the second coil are connected in series, the total impedance of the coil assembly is: 2(R1'+ R2' + R3'+ R4'). In the above example, if there is only one layer of coils, i.e. the first coil or the second coil, the total impedance of the coil assembly is: (R1'+ R2' + R3'+ R4').

Therefore, in the embodiment of the present disclosure, the impedance can be greatly reduced by connecting the first coil and the second coil in parallel through the via holes.

In the embodiment of the present disclosure, since the winding directions of the first coil and the second coil are the same, the winding method of the parallel coil is a new winding method, compared to the prior art in which the winding directions of the first coil and the second coil are opposite, for example, the first layer coil is wound from outside to inside one by one and the second layer coil is wound from inside to outside one by one. Moreover, the winding mode is also beneficial to the consistency of the current directions of the first coil and the second coil which are connected in parallel, and compared with the situation that if the current directions of the first coil and the second coil are opposite, a part of current can flow from the nth turn to the (n + 1) th turn in the opposite direction, the current loss can be reduced, and the heating of the coil assembly can be reduced.

In some embodiments, the first coil has at least one break, and an outlet end of the wire, through which current flows, is located in the break.

For example, as shown in FIG. 5, there is a break in the first coil at the second location 222. Of course in other embodiments, the first coil has two breaks, one at the first position 221 of fig. 5 and the other at the second position 222 of fig. 5; alternatively, the number of the interruptions on the first coil may be at least two, and the interruptions may be located in any radial direction of the first coil.

Here, one of the interruptions is used for the passage of an outlet terminal on the line, through which current flows.

In the embodiment of the disclosure, because the wire outlet end for current to flow out on the wire can be located in the fracture, the wire for current to flow out of the coil assembly can pass through the fracture to the outer side of the whole coil assembly, so that the thickness of the coil assembly cannot be increased, and the parallel connection of the via holes can be realized on the premise of not increasing the thickness of the coil assembly.

Referring to fig. 6 again, in one embodiment, one end of the wire for current to flow out of the coil assembly is an outlet 2011, and one end of the wire for current to flow in of the coil assembly is an inlet 2012.

In one embodiment, the outlet end and the inlet end are connected to the first coil;

in another embodiment, the wire outlet end is connected to the first coil, and the wire inlet end is connected to the second coil.

In the embodiment of the present disclosure, the incoming line end may be disposed on the first coil, or may be disposed on the second coil, so as to implement current input of the first coil and the second coil.

And when the wire outlet end and the wire inlet end are both arranged on the first coil, the wire outlet end penetrates through the fracture and is led out to the outermost side of the coil assembly, so that the connection with other electronic components is facilitated. Therefore, the coil assembly provided by the embodiment of the disclosure can be on the same layer as the wire inlet end, so that the thickness of the wire inlet and the wire outlet of the coil assembly can be reduced.

At the break, the turns of the first coil are broken, each turn being essentially a split ring.

In some embodiments, the connection between the nth turn of the first coil and the mth turn of the second coil includes at least two positions, and the two positions are respectively located on two sides of the fracture of the first coil.

For example, as shown in fig. 9, the connection of the nth turn of the first coil to the mth turn of the second coil is at a third location 223, where 2231 and 2232 are both connected, the 2231 being on the first side of the break and the 2232 being on the second side of the break.

In other embodiments, the connection between the nth turn of the first coil and the via hole of the mth turn of the second coil in parallel includes at least two positions, which are respectively located on two sides of the fracture of the first coil.

In this example, the connection of each via in parallel includes a break. For example, as shown in fig. 5, at the first position 221 of fig. 5, the via may have a break in parallel with the first coil as at the second position 222 of fig. 5, and the via is connected to at least two places in parallel, which are respectively located at two sides of the break on the first coil.

Here, on a first side of the break, the current is distributed over the first coil and the second coil; at the fracture, current is converged at the second coil; on a second side of the fracture, current is redistributed between the first coil and the second coil. In this way, on both sides of the fracture, the current is distributed in two layers, namely in the first coil and the second coil; at the fracture, the current is distributed in one layer, i.e. in the second coil.

And, because the winding direction of the first coil and the second coil is the same; in this way, when the current is distributed in the two layers of the first coil and the second coil, the flowing directions of the current in the two layers are the same. Thus, compared with the prior art, if the winding directions of the two layers of coils are not consistent, the current distribution on the two sides is opposite in flowing direction, so that the current loss can be greatly reduced, and the heat generation of the coil assembly is greatly reduced.

In some embodiments, the wires forming the first coil and the second coil are both P strands; wherein, P is an integer greater than 1;

the ith strand of the nth turn of the first coil and the ith strand of the mth turn of the second coil are connected in parallel through a through hole; wherein i is an integer of 1 or more and less than P.

For example, as shown in fig. 10, a schematic diagram of 3 strands of one wire is disclosed. In this example, the wire forming the second coil and the second coil is 3 strands. Since the second coil is laminated on the first coil, the second coil is omitted in fig. 10. The second coil corresponding to the coil assembly of fig. 10 is shown in fig. 11.

In the above example, the first winding of the first coil and the second winding of the second coil are connected in parallel through a via hole, and the method includes: the 1 st strand of the nth turn of the first coil and the 1 st strand of the mth turn of the second coil are connected in parallel through a through hole; the 2 nd strand of the nth turn of the first coil and the 2 nd strand of the mth turn of the second coil are connected in parallel through a through hole; and the 3 rd strand of the nth turn of the first coil and the 3 rd strand of the mth turn of the second coil are connected in parallel through a through hole.

Thus, in the embodiment of the present disclosure, the current originally distributed on one wire can be distributed on a plurality of wires, so that the skin effect can be reduced, and the heat generation of the whole coil assembly can be reduced to a certain extent.

In some embodiments, the difference in length between any two of the P strands of the wire is within a predetermined length range.

For example, if the first coil has 3 strands of wires, the length difference between the 1 st and 2 nd strands of wires is within a predetermined length range, or the length difference between the 2 nd and 3 rd strands of wires is within a predetermined length range, or the length difference between the 1 st and 3 rd strands of wires is within a predetermined length range.

For another example, if the wires of the first coil and the second coil are both 3 strands; the length difference of two wires with the largest length difference in the 3 wires in the first coil is within a preset length range, and the length difference of two wires with the largest length difference in the 3 wires in the second coil is within a preset length range.

Of course, in other embodiments, any two of the P strands of wire are identical; or at least two of the P strands of the wires are the same, and the length difference of the two wires with the largest difference in the other strands of the wires is within a preset length range.

In one embodiment, the predetermined length range is less than or equal to 10 mm. In another embodiment, the predetermined length range is less than two percent of the wire forming the first coil or the wire forming the second coil.

In the embodiment of the disclosure, the wires forming the first coil and/or the second coil are a plurality of strands, and the lengths of any two strands of the plurality of strands of wires are not different; in this way, the current distributed in the plurality of strands of the wires is basically consistent in magnitude, so that the heat generation of each strand of the wires is basically consistent, and the loss of the coil assembly can be reduced to a certain extent.

In some embodiments, the P strands of wire comprise: p1, P2 and P3; wherein the P1 strands are located inboard of the P2 strands, and the P3 strands are located outboard of the P2 strands;

the length of the outlet end from which the P1 strands of power current flows out is greater than that of the outlet end from which the P2 strands of power current flows out, and the length of the outlet end from which the P3 strands of power current flows out is less than that of the outlet end from which the P2 strands of power current flows out.

Here, the P1, the P2, and the P3 may each be one or more strands. Only need satisfy follow the inboard outside of coil pack arranges in proper order: p1, P2 and P3.

For example, the P strands of the wires are respectively: 1 st, 2 nd, 3 rd, … … th and P th strands; wherein, the P is an integer larger than 1. If the coil assembly is arranged from the inner side to the outer side of the coil assembly in sequence: 1 st, 2 nd, 3 rd, … … th and P th strands; i.e., the 1 st strand is inside the 2 nd strand, the 2 nd strand is inside the 3 rd strand, and so on, and the M-1 st strand is inside the P-th strand. The length of the outgoing line end from which the 1 st power supply current flows out is greater than that of the outgoing line end from which the 2 nd power supply current flows out, the length of the outgoing line end from which the 2 nd power supply current flows out is greater than that of the outgoing line end from which the 3 rd power supply current flows out, and so on, the length of the outgoing line end from which the P-1 st power supply current flows out is greater than that of the outgoing line end from which the P-1 st power supply current flows out.

As shown in fig. 10, if the wire of the first coil of the coil assembly is 3 strands; the 3 strands of conducting wires are respectively the 1 st strand, the 2 nd strand and the 3 rd strand; wherein the 1 st strand is inside the 2 nd strand and the 3 rd strand is outside the 2 nd strand. Here, the length of the 1 st power supply current outgoing line terminal is greater than that of the 2 nd power supply current outgoing line terminal, and the length of the 2 nd power supply current outgoing line terminal is greater than that of the 3 rd power supply current outgoing line terminal, so that the lengths of the strands of wires from the power supply current outgoing line terminal to the nearest fracture are consistent, and the current in the strands of wires of the coil between the power supply current outgoing line terminal and the nearest fracture can be ensured to be consistent and generate heat.

In this way, in the embodiment of the present disclosure, the current magnitude of each strand of the wire of at least part of the coil can be made uniform, and the heat generation can be made uniform.

Of course, in other embodiments, any way of achieving substantially uniform lengths of the P strands of wires, or substantially uniform lengths of the wires of a portion of the coil segment in the P strands of wires, may be used, without limitation. For example, as shown in fig. 12 and 13, the wire is divided into 3 strands, which are the 1 st strand, the 2 nd strand and the 3 rd strand, respectively; the 3 strands of conducting wires are sequentially the 1 st strand, the 2 nd strand and the 3 rd strand from the inner side to the outer side; if the 3 rd strand is connected with the fracture into a straight line, the 1 st strand and the 2 nd strand are on the straight line; therefore, the length of the 1 st strand of wire appearance end is greater than that of the 2 nd strand of wire outlet end, and the length of the 2 nd strand of wire outlet end is greater than that of the 3 rd strand of wire outlet end.

In some embodiments, a tangent of a trailing end of an n-1 th turn of the first coil is at an angle greater than a predetermined angle with a tangent of a leading end of the n-th turn.

The leading end here is a start point of winding in the winding direction in each turn of the coil, and the trailing end here is an end point of winding in the winding direction in each turn of the coil.

For example, referring again to fig. 11, a second coil of a coil assembly is disclosed, wherein the tail end of the 1 st turn of the second coil is connected with the head end of the 2 nd turn.

Here, in practical applications, the tangent of the tail end of the n-1 th turn of the first coil refers to: a tangent to an end point of a tail end of an n-1 th turn of the first coil; in practical applications, a tangent of a head end of the nth turn of the first coil refers to: and a tangent of an end point of a head end of the nth turn of the first coil.

In another embodiment, an angle between a tangent of a tail end of the m-1 th turn of the second coil and a tangent of a head end of the m-th turn is larger than a predetermined angle.

Here, in practical applications, the tangent of the tail end of the m-1 th turn of the second coil refers to: a tangent to an end point of the m-1 th turn of the second coil; in practical applications, a tangent line of a head end of the mth turn of the second coil refers to: and a tangent to an end point of a head end of the mth turn of the second coil.

In one embodiment, the predetermined angle is a value greater than 80 degrees and less than 180 degrees. For example, the predetermined angle is 150 degrees; as another example, the predetermined angle is 180 degrees.

In an application scene, the joint of the tail end of the (n-1) th turn and the head end of the (n) th turn is a staggered turn; here, an angle between a tangent of a tail end of the n-1 th turn and a tangent of a head end of the n-th turn is: the angle at the position of the staggered turns, for example, the angle shown in fig. 14.

For example, as shown in fig. 9, a tangent of the tail end of the n-1 th turn is L1, a tangent of the head end of the n-th turn is L2, and the L1 forms an angle a with the L2. Here, angle B is also the angle between the tangent to the end of the 1 st turn and the tangent to the head of the 2 nd turn of L3. In this example, angle a is inward and angle B is outward. The inward and outward facing sides herein are described with respect to the position of the coil assembly.

In an application scenario, the predetermined angle of the above embodiment may be the angle shown in fig. 14. In said fig. 14, the two tangents of one of the included angles are L3 and L4, respectively; in one embodiment, the L3 may also be a staggered-turn line with staggered turns.

In another application scenario, the predetermined included angles in the above embodiment may also be included angles C and D as shown in fig. 12; in this example, angles C and D are both inwardly directed.

In some embodiments, the break is between the tail end of the n-1 th turn of the first coil and the head end of the nth turn;

or,

the tail end of the (n-1) th turn of the first coil and the head end of the (n) th turn are connected into an arc line.

In other embodiments, the tail end of the (m-1) th turn of the second coil and the head end of the (m) th turn are connected into an arc.

For example, as shown in fig. 9, a break is formed between the tail end of the (n-1) th turn of the first coil and the head end of the nth turn, and an arc is formed between the tail end of the (m-1) th turn of the second coil and the head end of the mth turn.

For another example, as shown in fig. 11 and 14, if an arc is formed between the tail end of the (n-1) th turn of the first coil and the head end of the (n) th turn.

In the embodiment of the disclosure, if an included angle between a tangent of a tail end of an n-1 th turn of the first coil and a tangent of a head end of the n-th turn is greater than a predetermined angle, and/or an included angle between a tangent of a tail end of an m-1 th turn of the second coil and a tangent of a head end of the m-th turn is greater than a predetermined angle, a connection between the tail end of the previous turn and the tail end of the next turn of the first coil and the tail end of the second coil can be smoother, so that resistance of current flowing through the first coil and the second coil is smaller, loss of current can be reduced, and further heating of the coil assembly is reduced.

And if the tail end of the previous turn and the head end of the next turn are not at the fracture, the tail end of the previous turn and the head end of the next turn are connected through an arc line, so that the flowing resistance of the current is smaller, the loss of the current is further reduced, and the heating of the coil assembly is further reduced. Of course, in other examples, the arc between the tail end of the previous turn and the pick-up of the next turn may be made as close to a circular arc as possible.

In some embodiments, after the wires of the first coil are divided into P strands, the P strands are combined into one strand at the wire outlet end of the first coil; wherein P is an integer greater than 1;

and/or the presence of a gas in the gas,

and after the conducting wire of the second coil is divided into P strands, the conducting wire of the second coil is combined into one strand at the wire inlet end of the second coil.

Of course, in other embodiments, if the line inlet end of the coil assembly is on the first coil, the wires of the first coil may be divided into P strands and then combined into one strand at the line inlet end of the first coil.

For example, in one embodiment, fig. 15 and 16 are first and second coils, respectively, of a coil assembly, the wires of the first and second coils each being three-stranded; the coil assembly is characterized in that the wire outlet end of the coil assembly is arranged on the first coil, and the wire inlet end of the coil assembly is arranged on the second coil. In the present example, as shown in fig. 17, the outlet ends of the first coil shown in fig. 15 are combined from 3 strands to 1 strand; as shown in fig. 18, the incoming line end of the second coil shown in fig. 16 is combined from 3 strands to 1 strand.

Thus, in the embodiment of the disclosure, after the wires of the first coil and the second coil are divided into multiple strands, the current originally distributed on one strand of wire can be distributed on the multiple strands of wires, so that the skin effect can be weakened, and the heat generation of the whole coil assembly is reduced; and the emergence end and the incoming line end of the coil assembly combine the stranded wire into 1 strand, so that the wiring of the coil assembly is facilitated, the wiring is simpler and more convenient, and the occupied space of the coil assembly is smaller when the coil assembly is subsequently accommodated at a terminal. So, this disclosed embodiment can also make coil pack occupation space littleer, the wiring is cleaner and tidier etc. under the prerequisite that reduces to generate heat.

The embodiment of the present disclosure provides a terminal, which includes the coil assembly of any of the above embodiments.

The terminal herein includes, but is not limited to, at least one of: cell-phone, panel computer, wearable equipment.

In some embodiments, the terminal further comprises: a housing;

the coil assembly is located in a footprint of a non-metallic plate within the housing.

The area of the housing here comprises at least: a footprint of a metal plate, and/or a footprint of a non-metal plate. The non-metallic plates herein may be replaced with insulating plates in other embodiments.

In one embodiment, the coil assembly is located in a mid-frame position of the housing.

In the embodiment of the disclosure, the coil assembly is arranged in the coverage area of the non-metal plate in the shell, so that the influence of the coil assembly on other assemblies and the like in the terminal can be reduced, and the damage of the terminal is reduced.

Of course, in other embodiments, the coil assembly may be located anywhere within the housing; for example, the coil assembly may be located at an intermediate position within the housing; as another example, the coil assembly may also be located within the housing proximate to the battery; and so on.

With regard to the terminal in the above-described embodiment, the specific manner in which each step performs the operation has been described in detail in the embodiment related to the apparatus, and will not be elaborated here.

Features disclosed in several of the product embodiments provided in this disclosure may be combined in any combination to yield new product embodiments without conflict.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A coil assembly, comprising at least:

a first coil and a second coil;

the second coil is laminated on the first coil; the winding directions of the second coil and the first coil are the same, and the nth turn of the first coil and the mth turn of the second coil are connected in parallel through a through hole; wherein the nth turn of the first coil is aligned with the mth turn in the second coil; the n and the m are integers greater than or equal to 1.

2. The coil assembly of claim 1,

the first coil and the second coil are wound into N turns from outside to inside one by one according to the direction that current flows into and flows out; n is an integer greater than or equal to 1, and N and m are both less than or equal to N.

3. The coil assembly of claim 2,

the first coil is provided with at least one fracture, and an outlet end for current to flow out of the lead is positioned in the fracture.

4. The coil assembly of claim 3,

the connection between the nth turn of the first coil and the mth turn of the second coil at least comprises two parts which are respectively positioned at two sides of the fracture of the first coil.

5. The coil assembly of claim 1,

the wires forming the first coil and the second coil are P strands; wherein, P is an integer greater than 1;

the ith strand of the nth turn of the first coil and the ith strand of the mth turn of the second coil are connected in parallel through a through hole; wherein i is an integer of 1 or more and less than P.

6. The coil assembly of claim 5,

the length difference between any two of the P strands of the conducting wires is within a preset length range.

7. The coil assembly of claim 6,

the P strands of the wires comprise: p1, P2 and P3; wherein the P1 strands are located inboard of the P2 strands, and the P3 strands are located outboard of the P2 strands;

the length of the outlet end from which the P1 strands of power current flows out is greater than that of the outlet end from which the P2 strands of power current flows out, and the length of the outlet end from which the P3 strands of power current flows out is less than that of the outlet end from which the P2 strands of power current flows out.

8. The coil assembly of claim 3,

and the included angle between the tangent of the tail end of the (n-1) th turn of the first coil and the tangent of the head end of the nth turn is larger than a preset angle.

9. The coil assembly of claim 8,

the fracture is formed between the tail end of the (n-1) th turn of the first coil and the head end of the nth turn;

or,

the tail end of the (n-1) th turn of the first coil and the head end of the (n) th turn are connected into an arc line.

10. A terminal, characterized in that it comprises a coil assembly according to any one of claims 1 to 9.

11. The terminal of claim 10, further comprising: a housing;

the coil assembly is located in a footprint of a non-metallic plate within the housing.

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