CN115458849A

CN115458849A - Battery and electronic equipment

Info

Publication number: CN115458849A
Application number: CN202211042957.3A
Authority: CN
Inventors: 王春歌; 高标; 刘洪伟; 徐凡; 裴卫平; 杨德操; 聂慧洋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-09
Also published as: WO2024046035A1

Abstract

The embodiment of the application discloses a battery and an electronic device, wherein the battery comprises a first electric connecting piece for constructing a compensation loop, a first end of the first electric connecting piece is positioned in the winding center and is electrically connected with a first pole piece, the first electric connecting piece continuously bends and extends from the first end to a second end in the axial projection plane of a winding core and comprises a first inflection point in the extending direction, and the bending section of the first electric connecting piece between the first end and the first inflection point is a first conductor section; the connecting line of the first end of the first electric connector and the first inflection point is a first reference line, the first reference line and the first conductor segment are enclosed to form a first enclosing region, and the target region is partially or completely positioned in the first enclosing region and is configured to: when the battery is in a power supply state, the first conductor section of the first electric connector can construct a low magnetic field area with a large area in a target area, and the influence of a core eddy current magnetic field on a load device can be effectively reduced. In application scenarios, the interference of the eddy magnetic field can be avoided.

Description

Battery and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of battery structural design, in particular to a battery and electronic equipment.

Background

Wireless headsets (true wireless earphone TWS) are rapidly developed and applied with the advantages of small size, portability, no wire constraint, etc. The TWS earphone battery takes a button type lithium battery as a main stream, the battery core structure of the TWS earphone battery is mostly assembled in a winding mode, current flows along a pole piece wound into a cylindrical shape to form eddy current in the charging and discharging processes of the battery with the winding structure, and an eddy current magnetic field can be generated due to the change of the current according to the electromagnetic induction principle. Referring to fig. 1, a winding structure of a typical battery roll core is schematically shown. In fig. 1, the long dotted line indicates a negative electrode sheet, the short dotted line indicates a positive electrode sheet, and the solid line indicates a separator between the positive and negative electrode sheets.

In the winding battery core, the positive pole piece and the negative pole piece have the same current and opposite directions, and can offset the generated induction magnetic fields to a certain extent. However, in the structural design of the battery, the length of the negative pole piece of the battery is usually greater than that of the positive pole piece due to safety considerations, and meanwhile, the magnetic conductivities of the positive pole piece and the negative pole piece are different, so that an eddy magnetic field is inevitably formed in the working process of the winding battery core, the eddy magnetic field and an earphone coil interact to generate noise, the product tone quality is directly influenced, and the use experience of a user is reduced.

Disclosure of Invention

The embodiment of the application provides a battery and electronic equipment, which can effectively reduce the interference of an eddy magnetic field generated by battery power supply to a load device and improve the use experience.

A first aspect of an embodiment of the present application provides a battery, including: the battery core comprises a shell and a winding core arranged inside the shell, and the winding core comprises a winding core structure formed by winding a first pole piece, a diaphragm and a second pole piece; a first electric connector is used for constructing a compensation loop, a first end of the compensation loop is positioned in the winding center and is electrically connected with the first pole piece, and a second end of the compensation loop is far away from the winding center relative to the first end and is used for being electrically connected with an external load; in an axial projection plane of the winding core, the first electric connecting piece continuously bends and extends from the first end to the second end and comprises a first inflection point in the extending direction, and a bending section of the first electric connecting piece between the first end and the first inflection point is a first conductor section; a connecting line of a first end of the first electric connecting piece and the first inflection point is a first reference line, the first reference line and the first conductor section enclose to form a first enclosing region, and the target region is partially or completely positioned in the first enclosing region, wherein the target region is a projection region of a local region of the winding core in the axial direction; and is configured to: when the battery is in a power supply state, the first conductor segment of the first electrical connector can generate a first magnetic field in the target area, and the first magnetic field is opposite to the direction of the magnetic field generated by the winding core. According to the arrangement, the compensation loop is constructed by continuously bending and extending the first electric connecting piece, the first surrounding area constructed on the basis of the first conductor section of the compensation loop covers part or all of the target area, and the magnetic field area with excellent convergence effect is formed in the target area. The electronic equipment load device using the battery is prevented from being interfered by the eddy magnetic field in the specific area.

In addition, based on the larger low magnetic field region formed by the first electric connecting piece, taking the battery applied to a wireless earphone as an example, the battery and the earphone have larger relative position margin and higher fault tolerance rate, and in addition, based on the higher fault tolerance rate obtained by the battery structure, the product yield can be further improved.

For example, the first pole piece can be a positive pole piece, and the second pole piece can be a negative pole piece; alternatively, the first pole piece can be a negative pole piece, and the second pole piece can be a positive pole piece.

In some practical applications, the first electrical connector includes at least two continuously curved conductor segments and at least one first inflection point, and the first electrical connector can be structurally set according to an application scenario and has good adaptability.

Based on the first aspect, an embodiment of the present application further provides a first implementation manner of the first aspect: the first end of the second electric connecting piece is electrically connected with the second pole piece, and the second end of the second electric connecting piece is used for being electrically connected with an external load; and is configured to: when the battery is in a power supply state, the second electric connecting piece can generate a second magnetic field, and the direction of the second magnetic field is opposite to that of the magnetic field generated by the winding core. That is, the negative connecting piece can also be configured to offset the eddy magnetic field, further reducing the influence that the core eddy magnetic field may produce.

Based on the first implementation manner of the first aspect, the present application provides a second implementation manner of the first aspect: the second conductor segment of the second electrical connector is operable to generate a second magnetic field at the target area when the battery is in the powered state. Therefore, on the basis of a compensation loop formed by the positive connecting piece, the second magnetic field generated by the negative connecting piece can assist in increasing the intensity of the canceling magnetic field and enhancing the canceling effect of current sound.

Based on the second implementation manner of the first aspect, the present application provides a third implementation manner of the first aspect: the first end of the second electric connecting piece is positioned in the winding center, and the second end of the second electric connecting piece is far away from the winding center relative to the first end; in the axial projection plane of the winding core, the second electric connecting piece continuously bends and extends from the first end to the second end and comprises a second inflection point in the extending direction, the bending section of the second electric connecting piece, which is positioned between the first end and the second inflection point, is a second conductor section, the connecting line of the first end of the second electric connecting piece and the second inflection point is a second reference line, the second reference line and the second conductor section enclose to form a second enclosing area, and the target area is partially or completely positioned in the second enclosing area. Illustratively, the first electric connecting piece and the second electric connecting piece are connected in an S shape, and based on the battery with the combined configuration, the counteracting magnetic fields formed by the first electric connecting piece and the second electric connecting piece are superposed on a target area, so that the performance of the battery is more remarkable.

In practical applications, the second electrical connector comprises at least two continuously curved conductor segments and at least one second inflection point. And similarly, the structure can be set according to the application scene, and the adaptability is better.

Based on the first implementation manner of the first aspect, an embodiment of the present application further provides a fourth implementation manner of the first aspect: the bending curvature of the second electric connecting piece is approximately the same as the winding curvature of the winding core, and the second electric connecting piece is approximately coaxially arranged with the winding core structure. By the arrangement, on the basis of the compensation loop formed by the first electric connecting piece, the second magnetic field generated by the second electric connecting piece can assist in increasing the area of the low magnetic field region, and the offset effect of current sound is further improved.

For example, the second end of the first electrical connector and the second end of the second electrical connector may be disposed at the top, bottom, or side of the cell, and the second end of the first electrical connector and the second end of the second electrical connector may be disposed at the top, bottom, or side of the cell.

In practical application, the first electric connector is arranged on the first axial end side of the shell, and the second electric connector is arranged on the first axial end side, the second axial end side or the peripheral wall of the shell; the first axial end side and the second axial end side are respectively defined as two axially opposite end sides of the housing of the cell. Under a specific application scene, adaptive configuration can be carried out according to an actual assembly relation.

Based on the fifth implementation manner of the first aspect, an embodiment of the present application further provides the fifth implementation manner of the first aspect: the winding core further comprises a first pole lug and a second pole lug, and the first pole lug and the second pole lug are configured as follows: when the battery is in a power supply state, at least one of the two can generate a third magnetic field in the target area, and the direction of the third magnetic field is opposite to that of the magnetic field generated by the winding core. Based on the first pole lug and the second pole lug with preset included angles, one of the first pole lug and the second pole lug can form the third magnetic field in the ear target area, and the third magnetic field can assist in increasing the strength of the offset magnetic field; the third magnetic field formed by the other can assist in increasing the area of the low magnetic field region, thereby enabling to further increase the cancellation effect of the current sound.

Based on the second implementation manner of the first aspect, or the third implementation manner of the first aspect, or the fourth implementation manner of the first aspect, or the fifth implementation manner of the first aspect, this application provides an example of the sixth implementation manner of the first aspect: at least the first electric connecting piece is made of conductive metal sheets; the first electric connector is insulated from the shell, and an interelectrode insulating gasket is arranged between at least the cover plate of the shell and the first electric connector. Preferably, both external connecting members may be made of a conductive metal sheet, for example, but not limited to, one of a stainless steel sheet, a nickel-plated steel sheet, and a copper sheet, and after assembly, the inter-electrode short circuit may be completely avoided based on the arrangement of the inter-electrode insulating spacer.

For example, the inter-electrode insulating spacer is in a circular ring shape, and the inter-electrode insulating spacer can be sleeved on the periphery of the pole with an insulating space therebetween. The structure is simple and compact, and the manufacturability is better.

Based on the second implementation manner of the first aspect, or the third implementation manner of the first aspect, or the fourth implementation manner of the first aspect, or the fifth implementation manner of the first aspect, this application provides an example of the first aspect, and the example further provides a seventh implementation manner of the first aspect: at least the first electric connecting piece is made of FPC (flexible printed circuit). Thus, the production process can be simplified, and the cost of the battery can be reduced.

Illustratively, the FPC base sheet is annular and fitted around the outer periphery of the post. The structure is more compact and reasonable.

Based on the second implementation manner of the first aspect, or the third implementation manner of the first aspect, or the fourth implementation manner of the first aspect, or the fifth implementation manner of the first aspect, this application provides an example of the first aspect, and the example further provides an eighth implementation manner of the first aspect: at least the first electric connector is made of a cable with a coating layer. Similarly, the production process can be simplified, and the battery cost can be reduced.

Based on the eighth implementation manner of the first aspect, the present application provides a ninth implementation manner of the first aspect: the shell is provided with a limiting sheet, the surface of the limiting sheet comprises a limiting groove, and a first electric connecting piece made of a cable is arranged in the limiting groove. By the arrangement, the first conductor section of the lead core material can be kept in a stable posture, and on the basis, a stable first magnetic field can be formed in a target area, so that the effect of eliminating current is ensured.

In practical application, the limiting groove can also be a groove structure which is completely arranged in the limiting sheet body; in other applications, it may also be fixed by a glue dispensing process.

In a second aspect, the present embodiment provides an electronic device, including a battery and a load device electrically connected to the battery, where the battery is the battery as described above, and a geometric center of the load device is located in the target area in a projection plane of an axial direction of the winding core.

In some implementations, the electronic device may be of a different device type having a load device. Illustratively, the electronic device may be a headset and the load device is a speaker of the headset.

Drawings

Fig. 1 is a schematic view of a winding structure of a typical conventional battery roll core;

fig. 2 is a schematic diagram of an overall structure of a battery according to an embodiment of the present invention;

FIG. 3 is an exploded view of the assembly of the battery shown in FIG. 2;

fig. 4 is an exploded view of an assembly of a battery cell according to an embodiment of the present invention;

FIG. 5 is a top view of FIG. 2;

FIG. 6 is a simulated plot of magnetic field strength formed based on the battery of FIG. 2;

fig. 7 is a schematic view of the overall structure of another battery according to the embodiment of the present invention;

FIG. 8 is another angular schematic view of the battery shown in FIG. 7;

fig. 9 is an exploded view of the assembly of the battery shown in fig. 7;

FIG. 10 is a top view of FIG. 7;

fig. 11 is a schematic view of the overall structure of another battery according to the embodiment of the present invention;

fig. 12 is an exploded view of the assembly of the battery shown in fig. 11;

FIG. 13 is a top view of FIG. 11;

fig. 14 is a schematic view of the overall structure of another battery according to the embodiment of the present invention;

fig. 15 is an exploded view of the assembly of the battery shown in fig. 14;

FIG. 16 is a top view of FIG. 14;

fig. 17 is a schematic view of the overall structure of another battery according to an embodiment of the present invention;

FIG. 18 is another angular schematic view of the battery shown in FIG. 17;

fig. 19 is an exploded assembly schematic view of the battery shown in fig. 17;

FIG. 20 is a top view of FIG. 17;

fig. 21 is a schematic view of the overall structure of another battery according to the embodiment of the present invention;

fig. 22 is an exploded view of the assembly of the battery shown in fig. 21;

FIG. 23 is a top view of FIG. 21;

fig. 24 is a schematic view of the overall structure of another battery according to the embodiment of the invention;

fig. 25 is an exploded view of the assembly of the battery shown in fig. 24;

FIG. 26 is a top view of FIG. 24;

fig. 27 is an exploded view of another cell according to an embodiment of the present invention;

fig. 28 is a top view of fig. 27.

Detailed Description

The embodiment of the application provides a battery based on roll core structure, can effectively reduce the interference of the eddy current magnetic field that battery power supply produced to the load device through the configuration improvement optimization, is showing and is promoting user experience.

In the prior art, a winding battery cell inevitably forms an eddy magnetic field in the working process, and the existence of the eddy magnetic field influences the product use experience to different degrees in corresponding application scenes. Taking an earphone as an example, the eddy magnetic field and the earphone coil interact to generate noise, and the sound quality of the earphone is reduced.

Based on this, this application embodiment provides a battery, this battery includes electric core and the first electric connector that can electrically conduct, this electric core includes shell and book core, and wherein, roll up the core and include the book core structure that is formed by the coiling of first pole piece, diaphragm and second pole piece, specifically, through the winding technology according to the order of first pole piece-diaphragm-second pole piece-diaphragm, or according to the order coiling of second pole piece-diaphragm-first pole piece-diaphragm and form the spiral and roll up the core structure, roll up the core and set up inside the shell. For the configuration of the winding core structure formed by winding, the first pole piece can be a positive pole piece, and correspondingly, the second pole piece can be a negative pole piece; alternatively, the first pole piece may be a negative pole piece, and correspondingly, the second pole piece may be a positive pole piece. In general, the first and second pole pieces of the battery may be different in length, such as but not limited to the case where the negative pole piece length is greater than the positive pole piece length, while both have different magnetic permeability based on different material properties. Thus, when the battery is in a power supply state or a charging state, the wound core will generate an eddy magnetic field during operation (e.g., inward of the vertical plane of the paper as shown in fig. 1).

In this embodiment, a first end of the first electrical connector is located at the winding center and is electrically connected to the first pole piece, and a second end of the first electrical connector is away from the winding center relative to the first end and is configured to be electrically connected to an external load. The first electric connecting piece continuously bends and extends from the first end to the second end in an axial projection plane of the winding core, and the first electric connecting piece comprises a first inflection point in the extending direction.

Here, the "inflection point" refers to a point of the continuously curved conductive connection member where the bending direction is changed, and is equivalent to a boundary point of a concave arc and a convex arc of a continuous curve in a mathematical concept; the "axial direction" refers to a direction parallel to the winding center line of the winding core. Meanwhile, in the axial projection plane of the winding core, the connecting line of the first end of the first electric connecting piece and the first inflection point is a first reference line; the first reference line and the first conductor section are enclosed to form a first enclosing region, the target region is partially or completely located in the first enclosing region, and the target region is a projection region of the local region of the winding core in the axial direction. That is, the target area is where a load device, which is a device sensitive to a magnetic field in an electronic apparatus, is located that needs to avoid interference from an eddy magnetic field. It will be appreciated that the target area may be larger or smaller than the area of the load device, or may be offset by a small amount relative to the area of the load device, rather than being limited to coinciding with the load device.

Specifically, the first conductor segment of the first electrical connection can generate a first magnetic field at the target area, the first magnetic field being opposite in direction to the magnetic field generated by the jellyroll. That is, the compensation loop is constructed by continuously bending the extended first electric connector, and the first surrounding area constructed based on the first conductor segment of the compensation loop covers part or all of the target area, so that the magnetic field area with excellent convergence effect is formed in the target area, and therefore, a low magnetic field area with a large area can be constructed and formed in the corresponding target area, and the influence of the core eddy magnetic field on the load device can be effectively reduced. The electronic equipment load device using the battery is prevented from being interfered by the eddy magnetic field in the specific area.

Meanwhile, based on the larger low magnetic field region formed by the first electric connecting piece, taking the application of the battery to a wireless earphone as an example, the battery and the earphone have larger relative position margin and higher fault tolerance rate, and in addition, based on the higher fault tolerance rate obtained by the battery structure, the product yield can be further improved.

In order to better understand the technical solutions and technical effects of the present application, without losing generality, specific embodiments will be described in detail below with reference to the accompanying drawings, where a wireless headset is used as an application scenario of the battery 10, and a configuration mode in which a first pole piece is a positive pole piece and a second pole piece is a negative pole piece is used. Referring to fig. 2 and fig. 3, fig. 2 is a schematic diagram of an overall structure of a battery according to an embodiment of the present invention, and fig. 3 is an exploded schematic diagram of the battery shown in fig. 2.

As shown in fig. 2 and 3, the positive electrode tab 2 of the battery 10 is disposed on the first axial end side of the battery cell 1, that is, on the side of the terminal post 152, and the positive electrode tab 2 is a first electrical connector electrically connected to the positive electrode tab; a negative electrode connection tab 3 is also provided at the first axial end side, the negative electrode connection tab 3 being a second electrical connection member electrically connected to the negative electrode tab and serving only to establish electrical connection with the load device. The battery 10 further includes a positioning member 5, where the positioning member 5 protrudes laterally relative to the casing of the battery cell 1, and is used for assembling and positioning the battery.

The winding core 11 of the battery cell 1 is embedded in a casing formed by enclosing a bottom case 14 and a top cover 15, and please refer to fig. 4, which is an assembly explosion diagram of the battery cell 1 in this embodiment. The bottom shell 14 includes an axial end opening, and the top cover 15 is connected to the axial end opening of the bottom shell 14 in a sealing manner to accommodate the winding core 11.

Here, the material of the bottom case 14 and the cover plate 151 may be stainless steel or aluminum alloy, and specifically, the bottom case 14 and the cover plate 151 of the top cover 15 may be connected by a welding process, such as, but not limited to, laser welding or ultrasonic welding.

As shown in fig. 3 and 4, a pole 152 is inserted into the middle of the cover plate 151 of the top cover 15, and a positive and negative insulating gasket 153 is interposed therebetween. The positive electrode tab 12 is connected with the positive electrode plate, and the negative electrode tab 13 is connected with the negative electrode plate. In this embodiment, the pole 152 and the positive electrode tab 12 are the positive electrodes of the battery cell 1; the housing 14 and the cover plate 151 are connected with the negative electrode tab 13, and are the negative electrode of the battery cell.

The positive electrode connecting sheet 2 is electrically connected with the pole 152 and is connected with the positive electrode pole piece through the pole 152 and the positive electrode tab 12; the positive electrode tab 2 has a first end 21 located at the winding center and a second end 22 located away from the winding center with respect to the first end 21. The first end 31 of the negative connecting piece 3 is electrically connected with the cover plate 151, and here, the second end 32 of the negative connecting piece 3 and the second end 22 of the positive connecting piece 2 are circumferentially spaced and both axially extended to be respectively used for being electrically connected with an earphone Speaker (SPK). The second end 32 of the negative tab 3 and the second end 22 of the positive tab 2 are in the form of PINs extending axially from the top, i.e. PINs at the top.

The positive electrode connecting piece 2 is made of a conductive metal sheet, and an inter-electrode insulating spacer 4 is arranged between the negative electrode cover plate 151 and the positive electrode connecting piece 2 formed by the conductive metal sheet to avoid short circuit between the two. The material of the inter-electrode insulating spacer 4 may be selected according to the actual product design requirement, for example, but not limited to, one of PPS (Polyphenylene sulfide), PFA (polytetrafluoroethylene), and PEEK (polyetheretherketone).

In this embodiment, the inter-electrode insulating spacer 4 is annular and is fitted around the outer periphery of the post 152, and an insulating gap P that can form a safety distance is provided therebetween. Specifically, at the corresponding positions of the inter-electrode insulating spacer 4 and the negative electrode connecting piece 3, pin passing openings 41 are opened so that the pins of the negative electrode connecting piece 3 connected to the cover plate 151 protrude.

In other specific applications, the inter-electrode insulating spacer may be configured in other shapes, for example, but not limited to, the inter-electrode insulating spacer may be configured in the same shape as the conductive body of the positive electrode connecting piece 2 or have a slightly larger outline than the conductive body, so as to prevent the positive electrode connecting piece 2 made of the conductive metal sheet from being shorted with the cover plate 151.

Specifically, in the axial projection plane of the winding core 11, the conductive body of the positive electrode connecting tab 2 continuously bends and extends from the first end 21 to the second end 22, see also fig. 5, which is a top view of fig. 2. A first reference line, indicated by reference L in the figure, is connected between the first end 21 of the positive connector piece 2 and the first inflection point a. In the present embodiment, the target area is the position of the earphone speaker 20 shown by the dotted line in the figure, and is partially or completely located in the first enclosure area formed by the first reference line L and the first conductor segment 23, that is, the earphone speaker 20 is located on the connecting line between the first end 21 and the second end 22 of the positive connection piece 2.

The positive connecting piece 2 extends in an approximately S-shaped curved manner, i.e. comprises two continuously curved conductor sections, and a compensation circuit is formed therefrom. Here, the "S" shape is used to express that the positive electrode connecting sheet 2 has a concave arc section and a convex arc section which are connected in sequence, and it is understood that the positive electrode connecting sheet 2 which is bent and extended does not have a body shape which is formed completely according to the extending tendency of the "S" shape, and when the positive electrode connecting sheet is specifically implemented, the positive electrode connecting sheet can be determined to have a shape with an unequal section according to the structural strength and the process feasibility.

Here, the positive electrode connecting piece 2 includes a first inflection point a in the extending direction, and a bent section between the first end 21 and the first inflection point a is a first conductor segment 23 forming a first magnetic field, wherein a first reference line L intersects the first conductor segment 23. As shown in fig. 5, a portion of the first conductor segment 21 adjacent to the first end 21 is located on one side of the first reference line L, and a portion of the first conductor segment 21 adjacent to the first inflection point a is located on the other side of the first reference line L.

For the case that the cell negative plate is the main body for generating the eddy magnetic field, in the battery power supply state, the current direction in the positive connecting piece 2 is opposite to the current direction in the negative plate inside the winding core 11, that is, a first magnetic field (outward from the vertical paper shown in fig. 5) capable of canceling the eddy magnetic field is formed at the position of the earphone speaker 20 (target area); conversely, for the case that the positive electrode plate of the battery cell is the main body for generating the eddy magnetic field, the current direction in the positive electrode connecting plate 2 is opposite to the current direction of the positive electrode plate inside the winding core 11 in the battery power supply state, and a first magnetic field capable of canceling the eddy magnetic field can be formed at the position where the earphone speaker 20 (target area) is located.

In this embodiment, the first conductor segment 23 for forming the first magnetic field has a relatively large wrap angle, which approximates a closed loop. A magnetic field region having an excellent convergence effect can be formed, and refer to fig. 6, which is a simulation diagram of the intensity of a magnetic field formed based on the battery shown in fig. 2. Fig. 6 shows that, by applying the embodiment of the present application, a low magnetic field region with a large area can be purposefully constructed at the position of the earphone speaker, thereby effectively eliminating eddy current magnetic field noise in the earphone. Meanwhile, under the application scene of the adaptive earphone, the battery solution provided based on the set of scheme can be applied to the left and right earphones, the problem of eddy noise of the left and right ears is solved, and the manufacturing cost and the management cost can be reasonably controlled on the basis of not additionally increasing the production and assembly difficulty.

It should be noted that the positive electrode tab 2 may also be formed by extending in other continuous bending forms, and of course, in other implementations, the positive electrode tab 2 needs to include at least one first inflection point a, so that the bending section between the first end 21 and the first inflection point a forms an effective first magnetic field.

In addition, in other specific implementations, the continuous bending form and the configuration mode of the positive connecting sheet can be converted and applied to the negative side based on the right-handed spiral rule, and it can be understood that for the same eddy magnetic field generating main body, the negative bending forms the corresponding conductive body bending section, and a low magnetic field region with a larger area can be constructed in the target region. Of course, in the basic configuration of the battery cell 1 casing (bottom case 14, cover plate 151) as the negative electrode, the continuously bent negative electrode connecting piece is adopted, and the first end of the continuously bent negative electrode connecting piece located at the winding center needs to be electrically connected with the center position of the bottom case 14, and a necessary insulating structure (not shown in the figure) needs to be arranged between the conductive body of the negative electrode connecting piece and the bottom case.

In addition, the negative terminal tab 3 may take the form of a different pin, such as but not limited to a common cable, or may be electrically connected to an external device contact through the battery case, as long as the functional requirements for connecting the battery negative to an external load are met.

Referring to fig. 7, 8 and 9 together, fig. 7 is a schematic diagram of an overall structure of another battery according to an embodiment of the present invention, fig. 8 is a schematic diagram of a bottom angle of the battery shown in fig. 7, and fig. 9 is an exploded view of the battery shown in fig. 7.

As shown in the drawing, the cell 1 and the positive electrode connecting piece 2a of this battery 10a are the same as those of the previous embodiment, and the negative electrode connecting piece 3a is made of a conductive metal sheet, is substantially C-shaped as a whole, and is used only for electrical connection with a load device. Here, in order to clearly show differences and connections between the present embodiment and the foregoing embodiments, the same reference numerals are used to indicate the same functional configurations or structures.

In the present embodiment, the substantially negative electrode connecting piece 3a is located at the bottom of the casing of the battery cell 1, that is, at the other axial end side axially opposite to the positive electrode connecting piece 2, and is formed to extend along the outer circumference of the bottom of the casing as shown in fig. 8, for example, but not limited to, laser welding, ultrasonic welding or resistance welding may be used to achieve the connection with the battery cell casing. Here, the positive connecting piece 2a and the negative connecting piece 3a may be made of a stainless steel sheet, a nickel-plated steel sheet, or a copper sheet according to the overall design requirements of the product.

The first magnetic field generated by the positive electrode tab 2a of this embodiment in the powered state of the battery 10a is the same as that generated in the previous example described with reference to fig. 2. Referring to fig. 10, a top view of fig. 7 is shown. As shown in the figure, the first magnetic field (out of the plane perpendicular to the paper) generated by the positive connecting piece 2a can counteract the eddy magnetic field formed by the electric core in the target area where the earphone speaker 20 is located (out of the plane perpendicular to the paper as shown in fig. 1), so as to form a low magnetic field region that effectively avoids interference.

Wherein, the positive connecting piece 2a and the negative connecting piece 3a are provided with PIN on the side surface. As shown in the figure, the positive connecting piece 2a and the negative connecting piece 3a extend to the peripheral edge of the axial end side, and then extend oppositely along the axial direction of the housing of the electric core 1, and form a pin of the second end 22a of the positive connecting piece 2a and a pin of the second end 32a of the negative connecting piece 3 a.

For the mode of side PIN, the peripheral surface of the shell of the battery cell 1 is covered with insulating gummed paper 6a. Of course, in a specific application, the insulating adhesive paper 6a may be wrapped completely circumferentially for achieving effective insulation between the pin of the positive side second end 22a and the pin of the negative side second end 32a, and other insulating structures may be disposed at corresponding positions, for example, but not limited to, an implementation form of an insulating sheet.

In addition, in the present embodiment, the positioning member for positioning the battery assembly is integrally formed with the negative electrode connecting piece 3a, and specifically, the positioning portion 5a is formed to extend laterally from the negative electrode connecting piece 3a in a letter "C". Compared with the positioning piece which is arranged independently, the positioning piece is simple in structure, easy to realize and good in assembly manufacturability. In other implementations, of course, the negative connector can take on different forms, such as, but not limited to, a straight strip extending to the opposite side to form the positioning portion,

in order to further reduce the influence possibly generated by the core eddy magnetic field, the negative connecting sheet can also be configured into a structural form which can counteract the eddy magnetic field. Referring to fig. 11 and 12 together, fig. 11 is a schematic view illustrating an overall structure of another battery according to an embodiment of the present invention, and fig. 12 is an exploded view illustrating the assembly of the battery shown in fig. 11. Similarly, in order to clearly illustrate the differences and connections between the present embodiment and the foregoing embodiments, the same functional configurations or structures are illustrated by the same reference numerals in the drawings.

In this embodiment, the positive electrode tab 2 (first electrical connector) and the negative electrode tab 3b (second electrical connector) of the battery 10b are located on the axial end side where the terminal 152 is located. The positive connecting sheet 2 is bent and extended in an approximately S shape, and a first magnetic field (inward from the plane of the drawing) is formed by the first conductor segment 23 between the first end and the first inflection point thereof, as shown in fig. 13, which is a top view of fig. 11.

The negative connection tab 3b can form a separate compensation loop that generates a second magnetic field (into the page) in the opposite direction to the eddy current field generated inside the jellyroll 11. In other words, the battery provided in this embodiment employs both the positive electrode tab and the negative electrode tab as external connection members that can form a compensation circuit.

Specifically, the negative electrode connecting piece 3b is substantially in a C shape, has a bending curvature substantially the same as the winding curvature of the winding core, is arranged along the peripheral edge of the cell casing, and is substantially coaxially disposed with the winding core structure. Here, the bending curvature of the negative electrode connecting piece 3b is substantially the same as the winding curvature of the winding core, and the curvature of the negative electrode connecting piece is substantially the same as the winding curvature of the winding core structure, and includes a certain deviation within a range allowed by the precision of the machining and assembling process, and is not specified to be completely the same or equal.

In this embodiment, the first end 31b of the negative electrode connecting piece 3b is electrically connected to the cover plate 151 of the battery cell 1, and the bent section between the first end 31b and the second end 32b is the second conductor section 33b of the negative electrode connecting piece 3b, and meanwhile, the insulating adhesive paper 6b may be covered between the second conductor section 33b and the cover plate 151. In other implementations, other insulating structures may be used to establish insulation for establishing the insulating relationship of the respective current paths in the second conductor segment 33b, such as, but not limited to, an integrally formed insulating layer structure on the surface of the second conductor segment 33b opposite the cap 151.

When the battery is in a power supply state, the current direction of the second conductor segment 33b of the negative electrode connecting piece 3b may be opposite to the current direction of the cell negative electrode piece, and thus the second magnetic field may be generated. In this way, the second magnetic field generated by the negative connection piece 3b can assist in increasing the area of the low magnetic field region on the basis of the compensation circuit formed by the positive connection piece 2, and further increase the effect of canceling the current sound.

Wherein, positive pole connection piece 2 and negative pole connection piece 3b are the top surface and go out PIN, and the second end 22 of positive pole connection piece 2 and the equal axial extension of second end 32b of negative pole connection piece 3b form corresponding PIN, and the circumference interval sets up.

In order to assist in increasing the strength of the counteracting magnetic field, the second magnetic field generated by the negative connecting piece may be formed in the target area. Referring to fig. 14 and 15 together, fig. 14 is a schematic view of an overall structure of another battery according to an embodiment of the present invention, and fig. 15 is an exploded view of the battery shown in fig. 14. In order to clearly illustrate the differences and connections between the present embodiment and the foregoing embodiments, the same functional configurations or structures are illustrated by the same reference numerals in the drawings.

In this embodiment, the positive electrode tab 2 and the negative electrode tab 3c of the battery 10c are both located on the axial end side where the terminal 152 is located. The positive connecting sheet 2 is bent and extended in an approximately S shape, and a first magnetic field (inward from the plane of the drawing) is formed by the first conductor segment 23 between the first end and the first inflection point thereof, as shown in fig. 16, which is a top view of fig. 14. The interpolar insulating spacer 4 disposed between the positive connection piece 2 and the negative connection piece 3c is not shown in fig. 16 to clearly illustrate the canceling magnetic field generated by the positive connection piece 2 and the negative connection piece 3 c.

The negative connection piece 3c generates a second magnetic field (into the plane of the drawing) in the area of the headphone speaker 20, which is opposite to the eddy magnetic field generated inside the winding core 11.

Specifically, the negative electrode connecting piece 3C is substantially C-shaped, a first end 31C thereof is electrically connected to the cover plate 151 of the battery cell 1, a bent section between the first end 31C and the second end 32C thereof is a second conductor section 33C of the negative electrode connecting piece 3C, and meanwhile, an insulating adhesive paper 6C is coated between the second conductor section 33C and the cover plate 151. It should be understood that the structural form of the second conductor segment 33c and the adhesive paper 6c fitted between it and the cover plate 151 in the present embodiment are the same as those in the embodiment described in fig. 11; the difference between them is that the second conductor segment 33c and the first conductor segment 23 of the present embodiment are located on the same side of the winding center.

When the battery is in a power supply state, the current direction of the second conductor segment 33c of the negative electrode tab 3c may be opposite to the current direction of the cell negative electrode tab, and thus the second magnetic field may be generated. Thus, the second magnetic field generated by the negative connection piece 3c can assist in increasing the intensity of the canceling magnetic field and the canceling effect of the current sound on the basis of the compensation circuit formed by the positive connection piece 2.

Wherein, positive pole connection piece 2 and negative pole connection piece 3c are the top surface and go out PIN, and the equal axial extension of second end 22 of positive pole connection piece 2 and the second end 32c of negative pole connection piece 3c forms corresponding PIN, and the circumference interval sets up.

The negative connecting piece capable of generating the offsetting magnetic field and the positive connecting piece are arranged on the same axial end side of the battery cell. According to the assembly requirements under different application scenes, the battery cell and the battery cell can be oppositely arranged at the two shaft end sides of the battery cell 1. Referring to fig. 17, 18 and 19 together, fig. 17 is a schematic view illustrating an overall structure of another battery according to an embodiment of the present invention, fig. 18 is a schematic view illustrating a bottom view of the battery shown in fig. 17, and fig. 19 is an exploded view illustrating the assembly of the battery shown in fig. 17.

In this embodiment, the positive connecting piece 2 of the battery 10d is located at the shaft end side where the terminal 152 is located, and the negative connecting piece 3d is located at the other shaft end side axially opposite to the positive connecting piece 2, that is, at the bottom of the bottom case of the battery cell 1. The positive connecting piece 2 is bent and extended in an approximately S shape, and a first magnetic field is formed by the first conductor segment 23 between the first end and the first inflection point (vertically inward from the plane of the paper), as shown in fig. 20, which is a top view of fig. 17. Fig. 20 does not show the winding core 11, the inter-electrode insulating spacer 4, and the like, for clearly illustrating the canceling magnetic field generated by the positive electrode connecting piece 2 and the negative electrode connecting piece 3 d.

The negative electrode connecting piece 3d is substantially C-shaped, a first end 31d thereof is electrically connected to the bottom surface of the bottom case 14 of the battery cell 1, a bent section between the first end 31d and the second end 32d thereof is a second conductor section 33d of the negative electrode connecting piece 3d, and an insulating adhesive paper 6d is covered between the second conductor section 33d and the bottom case 14. The structural form of the second conductor segment 33d and the adhesive paper 6d adapted between the second conductor segment and the bottom case 14 in this embodiment are the same as the configuration mechanism in the embodiment described in the foregoing fig. 14, except that the structure forming direction of the negative electrode connecting piece 3d adapted to the adhesive paper is different.

When the battery is in a power supply state, the current direction of the second conductor segment 33d of the negative electrode connecting piece 3d may be opposite to the current direction of the cell negative electrode piece, so that the second magnetic field may be generated (into the page). Thus, on the basis of the compensation loop formed by the positive connection piece 2, the second magnetic field generated by the negative connection piece 3d can also assist in increasing the strength of the cancellation magnetic field.

Wherein, positive pole connection piece 2 is that the top surface goes out PIN, and negative pole connection piece 3d is that the bottom surface goes out PIN, and second end 22 of positive pole connection piece 2 and the second end 32d of negative pole connection piece 3d all extend axially and form corresponding PIN.

For the batteries described in fig. 7, 11, 14 and 17, a power supply dBSPL (decibel with sound pressure as a measurement quantity) test was performed, respectively, using a conventional battery for magnetic field cancellation by an external circuit as a comparative example. The test data are as follows

Shown in table 1.

In combination with the data in the table, the four examples of the present application describe batteries, and the dBSPL values tested are all smaller than the comparative examples, so that the corresponding current tones are all less affected. In the battery shown in fig. 14, the external connection tab is configured by combining the "S" -shaped positive electrode connection tab and the "C" -shaped negative electrode connection tab, and the two tabs are located on the same axial end side, and the formed first magnetic field and second magnetic field are superimposed on the target region, so that the battery performance is more remarkable.

In other specific implementation manners, a combination configuration manner of the S-shaped positive connecting piece and the S-shaped negative connecting piece can be adopted, so that possible influence between currents can be further reduced.

In the foregoing embodiments, the first electrical connector (positive connection tab) and the second electrical connector (negative connection tab) are made of conductive metal sheets. In other specific implementations, an FPC (Flexible Printed Circuit) or a cable may be used to form an external connection member for constructing the compensation Circuit, so as to simplify the manufacturing process and reduce the battery cost.

Referring to fig. 21 and 22, fig. 21 is a schematic view illustrating an overall structure of another battery according to an embodiment of the present invention, and fig. 22 is an exploded view illustrating an assembly of the battery shown in fig. 21. In order to clearly illustrate the differences and connections between the present embodiment and the foregoing embodiments, the same functional configurations or structures are illustrated by the same reference numerals in the drawings.

As with the battery described in fig. 2, the present embodiment provides a battery 10e in which a positive electrode lead 2e for constructing a compensation circuit is provided on the positive electrode side, and a negative electrode lead 3e is provided on the same axial end side as the positive electrode lead 2 e. As shown in fig. 21 and 22, the first end of the positive electrode lead 2e is an adapter sheet 21e electrically connected to the terminal 152, the first end of the negative electrode lead 3e is an adapter sheet 31e fixedly connected to the cover plate 151 of the battery cell 1 casing, and the lead core material is used as the corresponding conductive body. In this embodiment, the outer layer of the positive electrode lead 2e can be effectively insulated compared to the positive electrode connecting sheet made of a conductive metal sheet.

The positive electrode lead 2e is bent and extended in an approximately S shape, and includes two continuously bent conductor segments, and a compensation loop is constructed by the two continuously bent conductor segments. And includes a first inflection point a in the extending direction, and the bent segment between the first end (21 e) and the first inflection point a is a first conductor segment 23e forming a first magnetic field (into the sheet). Please refer to fig. 23, which is a top view of fig. 21. Of these, the negative electrode lead 3e is used only for electrical connection with the load device.

When the battery is in a power supply state, the first conductor segment 23e of the positive lead 2e may have a current direction opposite to that of the cell negative pole piece, so that the first magnetic field may be generated.

In a specific implementation, the positive electrode lead 2e may also be formed by extending in other continuous bending forms, as long as the positive electrode lead 2e includes at least one first inflection point a, so that the bending section between the first end and the first inflection point a forms an effective first magnetic field.

In addition, the positive electrode lead 2e has a certain flexibility, and in order to keep the first conductor section 23e of the lead core material in a stable posture, in the present embodiment, the positive electrode stopper 7 is provided on the outer shell shaft end side of the electric core 1, the surface of the positive electrode stopper 7 includes a stopper groove 71, the positive electrode lead 2e made of the lead is embedded in the stopper groove 71, and the bending extending direction of the stopper groove 71 is adapted to the posture requirement of the positive electrode lead 2e, so that a stable first magnetic field is formed in the area where the earphone speaker 20 is located.

In this embodiment, the positive electrode limiting plate 7 is a ring shape sleeved on the periphery of the post 152, and the overall structure layout is more compact and reasonable on the basis of reliably fixing the positive electrode lead 2 e. In a specific implementation, the limiting groove can also be a groove structure which is completely arranged inside the limiting sheet body.

The posture of the positive electrode lead 2e is kept fixed, and in other specific implementations, the positive electrode lead may be fixed on the cover plate 151 of the battery cell 1 by a dispensing process. In addition, the first ends of the positive electrode lead 2e and the negative electrode lead 3e are not limited to be configured as an interposer, and in other specific implementations, the first ends may be directly electrically connected to the corresponding contact positions through a lead core material (not shown in the figure).

Referring to fig. 24 and 25, fig. 24 is a schematic view illustrating an overall structure of another battery according to an embodiment of the present invention, and fig. 25 is an exploded view illustrating the battery shown in fig. 24. In order to clearly illustrate the differences and connections between the present embodiment and the foregoing embodiments, the same functional configurations or structures are illustrated by the same reference numerals in the drawings.

As in the case of the battery described in fig. 2 and 22, the present embodiment provides a battery 10f in which a positive electrode FPC2f for constructing a compensation circuit is provided on the positive electrode side, and a negative electrode connecting tab 3 made of a conductive metal sheet is provided on the same axial end side as the positive electrode lead 2 e. As shown in fig. 24 and 25, a conductive copper sheet 25f is embedded in the flexible substrate layer 24f of the positive FPC2f, the conductive copper sheet 25f forms a conductive body, and the first end of the conductive body is an interposer 21f electrically connected to the conductive copper sheet 25f and electrically connected to the terminal 152 through the interposer 21 f. In this embodiment, the flexible substrate layer 24f of the positive FPC can be effectively insulated as compared with the positive connection tab made of a conductive metal sheet, and for example, but not limited to, the flexible substrate may be a polyimide or polyester film.

The conductive body constructed by connecting the adapter sheet 21f and the conductive copper sheet 25f is bent and extended in an S shape, comprises two continuously bent conductor sections, and constructs a compensation loop. And includes a first inflection point a in the extending direction, and the bent section between the interposer 21f and the first inflection point a is a first conductor section 23f forming a first magnetic field (into the plane of the paper). Please refer to fig. 26, which is a top view of fig. 24. The negative electrode lead 3f is made of a conductive metal sheet and is used only for electrical connection with a load device.

When the battery is in a power supply state, the first conductor segment 23f of the positive electrode FPC may have a current direction opposite to that of the cell negative electrode sheet, and thus the first magnetic field may be generated.

In order to further improve the ability to counteract the eddy magnetic field, the tabs inside the battery cells may be further optimized, please refer to fig. 27, which is an assembly explosion diagram of another battery cell according to an embodiment of the present invention. In order to clearly illustrate the differences and connections between the present embodiment and the foregoing embodiments, the same functional configurations or structures are illustrated by the same reference numerals in the drawings.

The positive electrode tab 12a and the negative electrode tab 13a of the battery cell 1a are respectively located on two axial end sides of the winding core 11, the positive electrode tab 12a is electrically connected with the pole 152, and the negative electrode tab 13a is electrically connected with the bottom case 14. The positive electrode tab 12a and the negative electrode tab 13a are configured to form a structure form capable of bending a current direction when electrified so as to generate a third magnetic field capable of being opposite to the direction of the cell eddy magnetic field in a battery power supply state.

As shown in fig. 27, in the present embodiment, the corresponding tab structure is realized based on the notches on the sheet. The positive electrode tab 12a is provided with a notch 121a, the negative electrode tab 13a is provided with a notch 131a, and when the battery supplies power, the direction of the bending current passing through the positive electrode tab and the negative electrode tab is opposite to the current direction of the negative electrode tab of the winding core, so that a third magnetic field (which is vertical to the paper surface inwards) is formed. Please refer to fig. 28, which is a top view of fig. 27.

For the positive electrode tab 12a and the negative electrode tab 13a with a predetermined included angle, one of them can form the third magnetic field in the target area where the earphone speaker 20 is located, which can assist to increase the intensity of the counteracting magnetic field; the third magnetic field formed by the other can assist in increasing the area of the low magnetic field region. As a whole, the effect of canceling the current sound can be further enhanced.

In addition, in other specific implementations, the positive electrode tab and the negative electrode tab are not limited to the structural forms shown in the figures, and any structure can be used as long as the bending current direction can be formed when electricity is applied.

Embodiments of the present application further provide an electronic device, which includes a battery and a load device, where the load device is electrically connected to the positive and negative electrodes of the battery, and the battery may be the battery described in the foregoing fig. 2 to 5 and 7 to 28. In the axial projection plane of the winding core, the geometric center of the load device is positioned in the target area.

The electronic device may be of the type of product that includes a load device, such as but not limited to a speaker of a headset. It should be understood that other functions of the corresponding electronic device constitute non-core points of the invention of the present application, and therefore are not described herein again.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and embellishments can be made without departing from the principle of the present invention, and these modifications and embellishments should also be regarded as the protection scope of the present invention.

Claims

1. A battery, comprising: the battery cell comprises a shell and a winding core arranged in the shell, and the winding core comprises a first pole piece, a diaphragm and a second pole piece;

a first end of the first electric connecting piece is positioned in the center of the winding core and is electrically connected with the first pole piece, and a second end of the first electric connecting piece is far away from the winding center relative to the first end and is used for being electrically connected with an external load;

in a projection plane of the axial direction of the winding core, the first electric connecting piece continuously bends and extends from the first end to the second end and comprises a first inflection point in the extending direction, and a bending section of the first electric connecting piece between the first end and the first inflection point is a first conductor section; a connecting line of a first end of the first electric connecting piece and the first inflection point is a first reference line, the first reference line and the first conductor segment are enclosed to form a first enclosing region, a target region is partially or completely positioned in the first enclosing region, and the target region is a projection region of a local region of the winding core in the axial direction;

and is configured to: when the battery is in a power supply state, the first conductor segment of the first electric connector can generate a first magnetic field in the target area, and the first magnetic field is opposite to the direction of the magnetic field generated by the winding core.

2. The cell defined in claim 1, wherein the first electrical connection comprises at least two continuously curved conductor segments and at least one of the first inflection points.

3. The battery of claim 1 or 2, further comprising a second electrical connector, a first end of the second electrical connector being electrically connected with the second pole piece, a second end of the second electrical connector being for electrical connection with an external load; and is configured to: when the battery is in a power supply state, the second electric connector can generate a second magnetic field, and the direction of the second magnetic field is opposite to that of the magnetic field generated by the winding core.

4. The battery of claim 3, wherein the second electrical connection comprises a second conductor segment that generates the second magnetic field at the target region.

5. The battery of claim 4, wherein a first end of the second electrical connector is located at a winding center, and a second end of the second electrical connector is remote from the winding center relative to the first end; in a projection plane in the axial direction of the winding core, the second electric connecting piece continuously bends and extends from the first end to the second end and comprises a second inflection point in the extending direction, and the bending section of the second electric connecting piece between the first end and the second inflection point is the second conductor section; the first end of the second electric connector and the line are second reference lines, the second reference lines and the second conductor sections enclose to form a second enclosing area, and part or all of the target area is located in the second enclosing area.

6. The cell defined in claim 5, wherein the second electrical connection comprises at least two continuously curved conductor segments and at least one of the second inflection points.

7. The battery of claim 3, wherein the second electrical connector has a curvature that is substantially the same as a winding curvature of the jellyroll and the second electrical connector is disposed substantially coaxially with the jellyroll structure.

8. The battery of any of claims 3 to 7, wherein the second ends of the first and second electrical connectors are one disposed at a top, bottom, or side of the cell and the other disposed at a top, bottom, or side of the cell.

9. The battery according to any one of claims 3 to 8, wherein the first electrical connector is disposed on a first axial end side of the housing, and the second electrical connector is disposed on a first axial end side, a second axial end side, or a peripheral wall of the housing; defining the first shaft end side and the second shaft end side as two axially opposite end sides of a shell of the battery core respectively.

10. The battery of any of claims 3-9, wherein the jellyroll comprises a first pole tab and a second pole tab;

the first and second pole tabs are configured to: when the battery is in a power supply state, at least one of the two can generate a third magnetic field in the target area, and the direction of the third magnetic field is opposite to that of the magnetic field generated by the winding core.

11. The cell of any one of claims 3 to 10, wherein of the first and second electrical connections, at least the first electrical connection is made of an electrically conductive metal sheet; the first electric connecting piece is insulated from the shell, and an inter-electrode insulating gasket is arranged between the cover plate of the shell and the first electric connecting piece.

12. The battery according to any one of claims 3 to 10, wherein at least the first electrical connector of the first and second electrical connectors is made of FPC.

13. The battery according to claim 12, wherein the substrate sheet of the FPC is annular and fitted around the outer periphery of the post.

14. The battery according to any one of claims 3 to 10, wherein at least the first electrical connector of the first and second electrical connectors is made of a cable having a coating.

15. The battery of claim 14, wherein the housing is provided with a limiting sheet, the surface of the limiting sheet comprises a limiting groove, and the first electrical connector made of a cable is arranged in the limiting groove.

16. The battery of any one of claims 1 to 15, wherein the first pole piece is a positive pole piece and the second pole piece is a negative pole piece.

17. An electronic device comprising a battery and a load device electrically connected to the battery, wherein the battery is the battery of any one of claims 1 to 16, and a geometric center of the load device is located in the target region in a projection plane of an axial direction of the winding core.

18. The electronic device of claim 17, wherein the load device is a horn.