WO2024046035A1 - 一种电池及电子设备 - Google Patents

一种电池及电子设备 Download PDF

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Publication number
WO2024046035A1
WO2024046035A1 PCT/CN2023/111394 CN2023111394W WO2024046035A1 WO 2024046035 A1 WO2024046035 A1 WO 2024046035A1 CN 2023111394 W CN2023111394 W CN 2023111394W WO 2024046035 A1 WO2024046035 A1 WO 2024046035A1
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WO
WIPO (PCT)
Prior art keywords
electrical connector
battery
magnetic field
connecting piece
winding core
Prior art date
Application number
PCT/CN2023/111394
Other languages
English (en)
French (fr)
Inventor
王春歌
高标
刘洪伟
徐凡
裴卫平
杨德操
聂慧洋
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024046035A1 publication Critical patent/WO2024046035A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/181—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for button or coin cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the embodiments of the present application relate to the technical field of battery structure design, and in particular, to a battery and electronic equipment.
  • TWS earphone batteries are mainly button-type lithium batteries. Most of their cell structures are assembled in a "winding" method. During the charging and discharging process of the winding structure battery, the current flows along the pole pieces wound into a cylindrical shape. Eddy currents are formed. According to the principle of electromagnetic induction, changes in current will generate eddy current magnetic fields.
  • Figure 1 shows a schematic diagram of the winding structure of a typical existing battery core. In Figure 1, the long dotted line shows the negative electrode piece, the short dotted line shows the positive electrode piece, and the solid line shows the separator between the positive and negative electrode pieces.
  • the currents in the positive and negative poles are of the same magnitude and in opposite directions, which can offset the induced magnetic fields generated by each other to a certain extent.
  • the length of the negative pole piece of the battery is often longer than that of the positive pole piece.
  • Embodiments of the present application provide a battery and electronic equipment that can effectively reduce the interference of the eddy current magnetic field generated by battery power supply on load devices and improve the user experience.
  • the first aspect of the embodiment of the present application provides a battery, including: a battery core and a first electrical connector.
  • the battery core includes a casing and a winding core disposed inside the casing.
  • the winding core includes a first pole piece, a separator and a third A core structure formed by winding two pole pieces; its first electrical connector is used to construct a compensation circuit, its first end is located at the winding center and is electrically connected to the first pole piece, and the second end of the first electrical connector is opposite The first end is far away from the winding center and is used for electrical connection with the external load; in the axial projection plane of the winding core, the first electrical connector is continuously bent and extended from the first end to the second end, and in the extension direction Including the first inflection point, the bending section of the first electrical connector between the first end and the first inflection point is the first conductor section; the line connecting the first end of the first electrical connector and the first inflection point is the first reference line , the first reference line and the first conduct
  • a compensation loop is constructed through the continuously bent and extended first electrical 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, forming a magnetic field with excellent convergence effect in the target area. Therefore, a large low magnetic field area can be constructed in the corresponding target area, which can effectively reduce the possible impact of the core eddy current magnetic field on the load device. Electronic equipment load devices using the battery can avoid interference from the eddy current magnetic field in this specific area.
  • the product yield can be further improved.
  • the first pole piece can be a positive pole piece, and the second pole piece can be a negative pole piece; or, the first pole piece can be a negative pole piece, and the second pole piece can be a positive pole piece.
  • the first electrical connector includes at least two continuously bent conductor segments and at least one first inflection point.
  • the structure can be set according to the application scenario, and has good adaptability.
  • the embodiment of the present application also provides a first implementation of the first aspect: it also includes a second electrical connector, the first end of the second electrical connector is electrically connected to the second pole piece, and the second electrical connector is electrically connected to the second pole piece.
  • the second end of the electrical connector is used to electrically connect with the external load; and is configured such that when the battery is in a power supply state, the second electrical connector can generate a second magnetic field, and the second magnetic field has an opposite direction to the magnetic field generated by the winding core.
  • the negative connecting piece can also be configured in a structural form that can offset the eddy current magnetic field, further reducing the possible impact of the eddy current magnetic field on the winding core.
  • the embodiment of the present application also provides a second implementation of the first aspect: when the battery is in the power supply state, the second conductor segment of the second electrical connector can be generated in the target area.
  • the second magnetic field In this way, on the basis of the 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 enhance the cancellation effect of the current sound.
  • embodiments of the present application also provide a third implementation of the first aspect: the first end of the second electrical connector is located at the winding center, and the third end of the second electrical connector is The two ends are far away from the winding center relative to the first end; in the axial projection plane of the winding core, the second electrical connector is continuously bent and extended from the first end to the second end, and includes a second inflection point in the extension direction.
  • the bending section of the two electrical connectors between the first end and the second inflection point is the second conductor section, the line connecting the first end of the second electrical connector and the second inflection point is the second reference line, and the second reference line is connected to the second inflection point.
  • the second conductor segment encloses to form a second surrounding area, and the target area is partially or entirely located within the second surrounding area.
  • both the first electrical connector and the second electrical connector adopt an "S" shaped connecting piece. Based on the battery configured in this combination, the offset magnetic fields formed by the first electrical connector and the second electrical connector are superimposed. In the target area, the battery performance is more significant.
  • the second electrical connector includes at least two continuously curved conductor segments and at least one second inflection point.
  • the structure can be set according to the application scenario and has good adaptability.
  • embodiments of the present application also provide a fourth implementation of the first aspect: the bending curvature of the second electrical connector is substantially the same as the winding curvature of the winding core, and the second electrical connector
  • the connecting piece and the winding core structure are arranged approximately coaxially.
  • the second end of one is disposed on the top, bottom or side of the battery core, and the other one is disposed on the top, bottom or side of the battery core.
  • the first electrical connector is configured on the first shaft end side of the housing
  • the second electrical connector is configured on the first shaft end side, the second shaft end side, or the peripheral wall of the housing; define the first shaft end side and the second axis end side are respectively two axially opposite end sides of the battery core housing.
  • adaptive configuration can be performed according to the actual assembly relationship.
  • the embodiment of the present application also provides the fifth implementation manner of the first aspect: the winding core further includes a first pole tab and a second pole tab, and the first pole tab and The second pole tabs are configured such that when the battery is in the power supply state, at least one of the two can generate a third magnetic field in the target area, and the third magnetic field has an opposite direction to the magnetic field generated by the winding core.
  • the first pole tab and the second pole tab having a predetermined angle, one of them can form the third magnetic field in the ear target area, which can assist in increasing the intensity of the offset magnetic field; the third magnetic field formed by the other can assist By increasing the area of the low magnetic field region, the cancellation effect of current sound can be further enhanced.
  • embodiments of the present application also provide A sixth embodiment of the first aspect: among the first electrical connector and the second electrical connector, at least the first electrical connector is made of conductive metal sheet; the first electrical connector is insulated from the housing, and at least An inter-electrode insulating gasket is provided between the cover plate of the housing and the first electrical connector.
  • both external connectors can be made of conductive metal sheets.
  • they can be one of stainless steel sheets, nickel sheets, nickel-plated steel sheets, and copper sheets.
  • the inter-pole insulating gasket is in the shape of a ring, and the inter-pole insulating gasket can be sleeved on the outer periphery of the pole with an insulating spacing between the two.
  • the structure is simple and compact, and the workmanship is good.
  • embodiments of the present application also provide A seventh implementation manner of the first aspect: among the first electrical connector and the second electrical connector, at least the first electrical connector is made of FPC. In this way, the production process can be simplified and battery costs can be reduced.
  • the FPC base material sheet is in the shape of a ring and is placed around the outer periphery of the pole.
  • the structure is relatively compact and reasonable.
  • embodiments of the present application also provide An eighth implementation manner of the first aspect: among the first electrical connector and the second electrical connector, at least the first electrical connector is made of a cable with a coating. Likewise, the production process can be simplified and battery costs can be reduced.
  • embodiments of the present application also provide a ninth implementation manner of the first aspect: in the housing A limiting piece is provided on the upper body, and the surface of the limiting piece includes a limiting groove, and a first electrical connector made of a cable is built into the limiting groove.
  • a ninth implementation manner of the first aspect can keep the first conductor section of the wire core material in a stable posture. On this basis, a stable first magnetic field can be formed in the target area to ensure the elimination of the effect of current flow.
  • the limiting groove can also be a groove structure completely built inside the limiting piece body; in other applications, it can also be fixed through a glue dispensing process.
  • the second aspect of the embodiment of the present application provides an electronic device, including a battery and a load device electrically connected to the battery.
  • the battery adopts the battery as described above.
  • the load device In the axial projection plane of the winding core, the load device The geometric center is located within the target area.
  • the electronic device may be of different device types with load devices.
  • the electronic device may be an earphone, and the load device may be a speaker of the earphone.
  • Figure 1 is a schematic diagram of the winding structure of a typical existing battery core
  • Figure 2 is a schematic diagram of the overall structure of a battery provided by an embodiment of the present invention.
  • FIG 3 is an exploded assembly diagram of the battery shown in Figure 2;
  • Figure 4 is an exploded schematic diagram of the assembly of a battery core provided by an embodiment of the present invention.
  • Figure 5 is a top view of Figure 2;
  • Figure 6 is a simulation diagram of the magnetic field strength formed based on the battery shown in Figure 2;
  • Figure 7 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 8 is a schematic diagram of the battery shown in Figure 7 from another angle
  • Figure 9 is an exploded assembly diagram of the battery shown in Figure 7;
  • Figure 10 is a top view of Figure 7;
  • Figure 11 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 12 is an exploded assembly diagram of the battery shown in Figure 11;
  • Figure 13 is a top view of Figure 11;
  • Figure 14 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 15 is an exploded schematic diagram of the assembly of the battery shown in Figure 14;
  • Figure 16 is a top view of Figure 14;
  • Figure 17 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 18 is a schematic diagram of the battery shown in Figure 17 from another angle
  • Figure 19 is an exploded assembly diagram of the battery shown in Figure 17;
  • Figure 20 is a top view of Figure 17;
  • Figure 21 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 22 is an exploded schematic diagram of the assembly of the battery shown in Figure 21;
  • Figure 23 is a top view of Figure 21;
  • Figure 24 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 25 is an exploded schematic diagram of the assembly of the battery shown in Figure 24;
  • Figure 26 is a top view of Figure 24;
  • Figure 27 is an exploded schematic diagram of the assembly of another battery core provided by an embodiment of the present invention.
  • Fig. 28 is a top view of Fig. 27.
  • Embodiments of the present application provide a battery based on a rolled core structure. Through structural improvement and optimization, the interference of the eddy current magnetic field generated by the battery power supply on the load device can be effectively reduced, and the user experience can be significantly improved.
  • the wound battery core inevitably forms an eddy current magnetic field during the working process.
  • the existence of this eddy current magnetic field affects the product use experience to varying degrees.
  • the eddy current magnetic field interacts with the headphone coil to produce noise, reducing the sound quality of the headphones.
  • a battery which includes a battery core and a conductive first electrical connector.
  • the battery core includes a casing and a rolling core, wherein the rolling core includes a first pole piece, a separator and a
  • the core structure formed by winding the second pole piece is, specifically, in the order of first pole piece-separator-second pole piece-diaphragm through the winding process, or in the order of second pole piece-separator-first pole piece -The sequential winding of the diaphragm forms a spiral core structure, and the core is arranged inside the shell.
  • the first pole piece can be a positive pole piece, and correspondingly the second pole piece can be a negative pole piece; or, the first pole piece can be a negative pole piece, and accordingly the second pole piece can be For the positive plate.
  • the lengths of the first pole piece and the second pole piece of the battery may be different.
  • the length of the negative pole piece is greater than the length of the positive pole piece.
  • the two pole pieces have different magnetic permeabilities based on different material properties. Therefore, when the battery is in a power supply state or a charging state, the wound battery core will generate an eddy current magnetic field during operation (for example, the vertical paper facing inward as shown in Figure 1).
  • the first end of the first electrical connector is located at the winding center, and the first end is electrically connected to the first pole piece, and the second end of the first electrical connector is far away from the winding center relative to the first end. , and the second end is used to electrically connect with the external load.
  • the first electrical connector in the axial projection plane of the winding core, extends continuously and curvedly from the first end to the second end, and the first electrical connector includes a first inflection point in the extension direction.
  • the "inflection point” refers to the point at which the continuously curved conductive connector changes the bending direction, which is equivalent to the dividing point between the concave arc and the convex arc of the continuous curve in the mathematical concept;
  • “axial direction” refers to the winding point with the winding core. direction parallel to the centerline.
  • the line connecting the first end of the first electrical connector and the first inflection point is the first reference line; the first reference line and the first conductor segment are enclosed to form a first enclosed area within, and the target area is partially or entirely located within the first surrounding area, and the target area is the axial projection area of the local area of the winding core.
  • the target area is the location of the load device that needs to avoid interference from the eddy current magnetic field.
  • the load device is a device in electronic equipment that is sensitive to magnetic fields. It can be understood that the target area may be larger or smaller than the area where the load device is located, or may have a slight offset relative to the area where the load device is located, but is not limited to being completely coincident with the load device.
  • the first conductor segment of the first electrical connector can generate a first magnetic field in the target area, and the first magnetic field has an opposite direction to the magnetic field generated by the winding core. That is to say, the compensation loop is constructed through the continuously curved and extended first electrical 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, forming an excellent convergence effect in the target area. Therefore, a large low magnetic field area can be constructed in the corresponding target area, which can effectively reduce the possible impact of the core eddy current magnetic field on the load device. Electronic equipment load devices using the battery can avoid interference from the eddy current magnetic field in this specific area.
  • the product yield can be further improved.
  • FIG. 2 is a schematic diagram of the overall structure of a battery provided by an embodiment of the present invention
  • Figure 3 is an exploded schematic diagram of the assembly of the battery shown in Figure 2.
  • the positive electrode connecting piece 2 of the battery 10 is disposed on the first axis end side of the battery core 1, that is, the side where the pole post 152 is located.
  • the positive electrode connecting piece 2 is the third electrically connected to the positive electrode piece.
  • An electrical connector; its negative connecting piece 3 is also arranged on the first shaft end side.
  • the negative connecting piece 3 is a second electrical connecting piece that is electrically connected to the negative electrode piece, and is only used to establish an electrical connection with the load device.
  • the battery 10 also includes a positioning member 5 that protrudes laterally relative to the battery cell 1 shell and is used for assembly and positioning of the battery.
  • the core 11 of the battery core 1 is built into a shell enclosed by a bottom case 14 and a top cover 15. Please also refer to FIG. 4, which is an exploded schematic diagram of the assembly of the battery core 1 in this embodiment.
  • the bottom shell 14 includes a shaft end opening, and the top cover 15 is sealingly connected to the shaft end opening of the bottom shell 14 to accommodate the winding core 11 .
  • the material of the bottom case 14 and the cover plate 151 can be stainless steel or aluminum alloy.
  • the bottom case 14 and the cover plate 151 of the top cover 15 can be connected by a welding process, such as but not limited to, laser welding or Ultrasonic welding.
  • poles 152 are inserted into the middle of the cover plate 151 of the top cover 15 , and positive and negative insulating washers 153 are arranged between them.
  • the positive electrode tab 12 is connected to the positive electrode piece
  • the negative electrode tab 13 is connected to the negative electrode piece.
  • the pole 152 and the positive tab 12 are the positive electrode of the battery core 1; the casing 14 and the cover plate 151 are connected to the negative electrode tab 13 and are the negative electrode of the battery core.
  • the positive connecting piece 2 is electrically connected to the pole 152, and is connected to the positive pole through the pole 152 and the positive tab 12; the first end 21 of the positive connecting piece 2 is located in the winding center, and its second end 22 is opposite The first end 21 is arranged away from the winding center. burden
  • the first end 31 of the electrode connecting piece 3 is electrically connected to the cover plate 151.
  • the second end 32 of the negative electrode connecting piece 3 and the second end 22 of the positive electrode connecting piece 2 are circumferentially spaced, and both extend axially.
  • the ones formed are respectively used for electrical connection with the earphone speaker (SPK).
  • SPK earphone speaker
  • the second end 32 of the negative electrode connecting piece 3 and the second end 22 of the positive electrode connecting piece 2 are both in the form of pins extending axially from the top, that is, a PIN is provided at the top.
  • the positive electrode connecting piece 2 is made of a conductive metal sheet, and an inter-electrode insulating gasket 4 is provided between the negative electrode cover 151 and the positive electrode connecting piece 2 formed of the conductive metal sheet to avoid short circuit between the two.
  • the material of the inter-electrode insulation gasket 4 can be selected according to actual product design requirements, such as but not limited to, PPS (Polyphenylene sulfide, polyphenylene sulfide), PFA (Polyfluoroalkoxy, soluble polytetrafluoroethylene), PEEK (polyetheretherketone, polyether) ether ketone).
  • the interpole insulating gasket 4 is annular and is set on the outer periphery of the pole 152, with an insulating spacing P between the two to form a safe distance. Specifically, at the corresponding positions of the inter-electrode insulating gasket 4 and the negative electrode connecting piece 3, a pin passage opening 41 is opened so that the pins of the negative electrode connecting piece 3 connected to the cover 151 can protrude.
  • inter-electrode insulating gaskets of other shapes may be configured, for example but not limited to, using an inter-electrode insulating gasket with the same shape as the conductive body of the positive electrode connecting piece 2, or an inter-electrode insulating gasket with an outer profile slightly larger than its conductive body. , it can also prevent the positive electrode connecting piece 2 made of conductive metal sheet from being short-circuited with the cover plate 151 .
  • the conductive body of the positive electrode connecting piece 2 is continuously bent and extended from the first end 21 to the second end 22 .
  • Figure 5 is the figure of Figure 2 Top view.
  • the first reference line indicated by the symbol L in the figure is connected between the first end 21 of the positive electrode connecting piece 2 and the first inflection point A.
  • the target area is the position of the earphone speaker 20 shown by the dotted line in the figure, part or all of which is located within the first enclosed area formed by the first reference line L and the first conductor segment 23, that is,
  • the earphone speaker 20 is located on the connection line between the first end 21 and the second end 22 of the positive connecting piece 2 .
  • the positive electrode connecting piece 2 is bent and extended in a roughly "S" shape, that is, it includes two continuously bent conductor segments, and thereby constructs a compensation circuit.
  • the "S" shape is used to express having concave arc segments and convex arc segments connected in sequence. It can be understood that the curved and extended positive electrode connecting piece 2 does not have a body shape formed entirely according to the "S" shape extending trend.
  • the shape of unequal cross-section can be determined based on structural strength and process feasibility.
  • the extension direction of the positive connecting piece 2 includes a first inflection point A, and the bending section between the first end 21 and the first inflection point A is the first conductor section 23 that forms the first magnetic field, wherein the first reference line L intersects the first conductor segment 23 .
  • the 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 the portion of the first conductor segment 21 adjacent to the first inflection point A is located on one side of the first reference line L. The other side.
  • the current direction in the positive electrode connecting piece 2 is opposite to the current direction in the negative electrode piece inside the winding core 11, that is, in the earphone speaker 20 (target The first magnetic field that can offset the eddy current magnetic field is formed at the location of the eddy current magnetic field (outside of the vertical paper shown in Figure 5); conversely, for the case where the positive electrode piece of the battery core is the main generator of the eddy current magnetic field, when the battery is powered, the positive electrode The current direction in the connecting piece 2 is opposite to the current direction in the positive electrode piece inside the winding core 11, and a first magnetic field that can offset the eddy current magnetic field can also be formed at the location of the earphone speaker 20 (target area).
  • the covering angle of the first conductor segment 23 used to form the first magnetic field is relatively large, and is approximately a closed loop. It can form a magnetic field area with excellent convergence effect.
  • Figure 6 is a simulation diagram of the magnetic field strength formed based on the battery shown in Figure 2.
  • a large low magnetic field area can be constructed and formed in a targeted manner at the location of the earphone speaker, thereby effectively eliminating the eddy current magnetic field noise in the earphone.
  • the battery solution provided by this solution can be used in left and right headphones and solve the problem of eddy current noise in left and right ears. It can reasonably control manufacturing without increasing the difficulty of production and assembly. costs and administrative costs.
  • the positive electrode connecting piece 2 can also be extended in other continuously curved shapes.
  • the positive electrode connecting piece 2 needs to include at least a first inflection point A so as to be located between the first end 21 and the first inflection point A.
  • the curved section between an inflection point A forms an effective first magnetic field.
  • the continuous bending shape and configuration of the positive electrode connecting piece can be converted to the negative electrode side based on the right-hand spiral rule. It can be understood that for the same eddy current magnetic field generating body, reverse bending forms The corresponding curved section of the conductive body can also build a large area of low magnetic field area in the target area.
  • the first end located at the winding center needs to be in line with the center of the bottom case 14 Electrical connection, and necessary insulation needs to be provided between the conductive body of the negative connecting piece and the bottom case edge structure (not shown in the figure).
  • the negative electrode connecting piece 3 can adopt different pin forms, such as but not limited to ordinary cables, or can be electrically connected to external devices through the battery shell, as long as it meets the functional needs of connecting the battery negative electrode to the external load.
  • Figure 7 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 8 is a schematic diagram of the bottom angle of the battery shown in Figure 7.
  • Figure 9 is an exploded assembly diagram of the battery shown in Figure 7 .
  • the battery core 1 and the positive electrode connecting piece 2a of the battery 10a are the same as the previous embodiment.
  • the negative electrode connecting piece 3a is made of conductive metal sheet, and the overall shape is roughly "C" shaped, and is only used with The load device is electrically connected.
  • components or structures with the same functions are indicated with the same symbols.
  • the approximately rectangular negative electrode connecting piece 3a is located at the bottom of the casing of the battery core 1, that is, on the other axial end side axially opposite to the positive electrode connecting piece 2, and along the outer edge of the bottom of the casing as shown in Figure 8
  • the circumferential extension is formed by, for example, but not limited to, laser welding, ultrasonic welding or resistance welding to achieve its connection with the cell casing.
  • the material of the positive electrode connecting piece 2a and the negative electrode connecting piece 3a can be stainless steel sheet, nickel sheet, nickel-plated steel sheet or copper sheet.
  • the first magnetic field generated by the positive connecting piece 2a of this embodiment is the same as the embodiment described in FIG. 2 .
  • Figure 10 is a top view of Figure 7 .
  • the first magnetic field (vertical to the outside of the paper) generated by the positive connecting piece 2a can offset the eddy current magnetic field formed by the battery core in the target area where the earphone speaker 20 is located (vertical to the outside of the paper as shown in Figure 1), forming an effective Avoid interfering low magnetic field areas.
  • the positive electrode connecting piece 2a and the negative electrode connecting piece 3a both have PINs coming out from the side.
  • the positive electrode connecting piece 2a and the negative electrode connecting piece 3a respectively extend to the outer peripheral edge of the shaft end side, and then extend toward each other along the axial direction of the shell of the battery core 1, and respectively form the second end 22a of the positive electrode connecting piece 2a. pin and the second end 32a pin of the negative electrode connecting piece 3a.
  • the outer peripheral surface of the battery cell 1 shell is covered with insulating tape 6a.
  • the insulating tape 6a can be fully circumferentially covered to achieve effective insulation between the pins of the second terminal 22a of the positive electrode side and the pins of the second terminal 32a of the negative electrode side, and can also be provided at corresponding positions.
  • Other insulation structures such as but not limited to implementation using insulation sheets.
  • the positioning member used for battery assembly positioning is integrally formed with the negative electrode connecting piece 3a.
  • the positioning portion 5a is formed by extending sideways from the "C"-shaped negative electrode connecting piece 3a.
  • this solution has a simple structure and is easy to implement, and the assembly process is better.
  • the negative electrode connecting piece can adopt different forms, such as but not limited to, using a straight strip extending to the opposite side to form the positioning portion,
  • the negative electrode connecting piece can also be configured in a structural form that can offset the eddy current magnetic field.
  • FIG. 11 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention
  • FIG. 12 is an exploded schematic diagram of the assembly of the battery shown in FIG. 11 .
  • the same functional components or structures are represented by the same symbols in the figures.
  • the positive electrode connecting piece 2 (first electrical connector) and the negative electrode connecting piece 3b (second electrical connecting member) of the battery 10b are both located on the shaft end side where the pole post 152 is located.
  • the positive electrode connecting piece 2 extends roughly in an "S" shape and forms a first magnetic field (inward perpendicular to the paper plane) through the first conductor segment 23 between its first end and the first inflection point.
  • This figure is a top view of Figure 11.
  • the negative electrode connecting piece 3b can form a separate compensation loop and can generate a second magnetic field (inward perpendicular to the paper surface). This second magnetic field has an opposite direction to the eddy current magnetic field generated inside the winding core 11 .
  • both the positive electrode connecting piece and the negative electrode connecting piece are used as external connections that can form a compensation loop.
  • the negative electrode connecting piece 3b is roughly in a "C" shape, and its bending curvature is roughly the same as the winding curvature of the winding core. It is arranged along the periphery of the battery core casing and is approximately coaxial with the winding core structure.
  • the bending curvature of the negative electrode connecting piece 3b is approximately the same as the winding curvature of the winding core, and the curvature is approximately the same as the curvature of the winding core structure, including a certain deviation within the range allowed by the accuracy of the processing and assembly process. Specify exactly or equal.
  • the first end 31b of the negative connecting piece 3b is electrically connected to the cover 151 of the battery core 1, and the bent section between the first end 31b and the second end 32b is the second conductor section of the negative connecting piece 3b.
  • the insulating tape 6b can be covered between the second conductor section 33b and the cover plate 151.
  • other insulating structures may also be used to establish insulation so as to form an insulating relationship corresponding to the current direction in the second conductor segment 33b, such as but not limited to, on the surface of the second conductor segment 33b opposite to the cover plate 151.
  • the upper integrally formed insulation layer structure may also be used to establish insulation so as to form an insulating relationship corresponding to the current direction in the second conductor segment 33b, such as but not limited to, on the surface of the second conductor segment 33b opposite to the cover plate 151.
  • the current direction of the second conductor section 33b of the negative electrode connecting piece 3b can be opposite to the current direction of the negative electrode piece of the battery core, thereby generating the second magnetic field.
  • the second magnetic field generated by the negative connecting piece 3b can assist in increasing the area of the low magnetic field area, further enhancing the cancellation effect of current sound.
  • the positive electrode connecting piece 2 and the negative electrode connecting piece 3b both have PINs on the top surface.
  • the second end 22 of the positive electrode connecting piece 2 and the second end 32b of the negative electrode connecting piece 3b both extend axially to form corresponding pins, and the circumferential direction Interval settings.
  • FIG. 14 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention
  • FIG. 15 is an exploded assembly diagram of the battery shown in FIG. 14 .
  • the same functional components or structures are represented by the same symbols in the figures.
  • the positive electrode connecting piece 2 and the negative electrode connecting piece 3c of the battery 10c are both located on the shaft end side where the pole 152 is located.
  • the positive electrode connecting piece 2 extends roughly in an "S" shape and forms a first magnetic field (inward perpendicular to the paper plane) through the first conductor segment 23 between its first end and the first inflection point.
  • This figure is a top view of Figure 14.
  • the inter-electrode insulating gasket 4 disposed between the positive electrode connecting piece 2 and the negative electrode connecting piece 3c is not shown in FIG. 16 to clearly illustrate the canceling magnetic field generated by the positive electrode connecting piece 2 and the negative electrode connecting piece 3c.
  • the negative connecting piece 3 c generates a second magnetic field (inward perpendicular to the paper plane) in the area where the earphone speaker 20 is located.
  • This second magnetic field has an opposite direction to the eddy current magnetic field generated inside the winding core 11 .
  • the negative electrode connecting piece 3c is roughly in a "C" shape, its first end 31c is electrically connected to the cover 151 of the battery cell 1, and the bent section between its first end 31c and the second end 32c is the negative electrode connection.
  • the second conductor section 33c of the sheet 3c is covered with insulating tape 6c between the second conductor section 33c and the cover plate 151.
  • the structural form of the second conductor section 33c and the insulating tape 6c adapted between it and the cover plate 151 in this embodiment are the same as those in the aforementioned embodiment described in Figure 11; the difference between the two is that this
  • the second conductor segment 33c and the first conductor segment 23 of the solution are located on the same side of the winding center.
  • the current direction of the second conductor segment 33c of the negative electrode connecting piece 3c can be opposite to the current direction of the negative electrode piece of the battery core, thereby generating the second magnetic field.
  • the second magnetic field generated by the negative connecting piece 3c can assist in increasing the intensity of the canceling magnetic field and enhance the cancellation effect of the current sound.
  • the positive electrode connecting piece 2 and the negative electrode connecting piece 3c both have PINs on the top surface.
  • the second end 22 of the positive electrode connecting piece 2 and the second end 32c of the negative electrode connecting piece 3c both extend axially to form corresponding pins, and the circumferential direction Interval settings.
  • Figure 17 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention.
  • Figure 18 is a schematic diagram of the bottom perspective of the battery shown in Figure 17.
  • Figure 19 is an exploded schematic diagram of the assembly of the battery shown in Figure 17 .
  • the positive electrode connecting piece 2 of the battery 10d is located on the shaft end side where the pole post 152 is located, and the negative electrode connecting piece 3d is located on the other shaft end side axially opposite to the positive electrode connecting piece 2, that is, on the side of the battery core 1
  • the positive electrode connecting piece 2 extends roughly in an "S" shape and forms a first magnetic field (inward perpendicular to the paper plane) through the first conductor segment 23 between its first end and the first inflection point.
  • FIG. 20 This figure is a top view of Figure 17.
  • the winding core 11 and the inter-electrode insulating spacer 4 are not shown in FIG. 20 to clearly illustrate the canceling magnetic field generated by the positive electrode connecting piece 2 and the negative electrode connecting piece 3d.
  • the negative electrode connecting piece 3d is roughly in the shape of a "C". Its first end 31d is electrically connected to the bottom surface of the bottom case 14 of the battery cell 1, and the bent section between its first end 31d and the second end 32d is the negative electrode connecting piece 3d.
  • the second conductor section 33d is covered with insulating tape 6d between the second conductor section 33d and the bottom case 14 .
  • the structural form of the second conductor section 33d and the insulating tape 6d adapted between it and the bottom case 14 are the same as the configuration mechanism in the embodiment described in Figure 14. The difference is that the negative electrode of this embodiment
  • the connecting piece 3D adapts to the structural forming direction of the insulating tape in different directions.
  • the current direction of the second conductor segment 33d of the negative electrode connecting piece 3d can be opposite to the current direction of the negative electrode piece of the battery core, thereby generating the second magnetic field (inward perpendicular to the paper plane).
  • the second magnetic field generated by the negative connecting piece 3d can also assist in increasing the intensity of the canceling magnetic field.
  • the positive connecting piece 2 has a PIN on the top surface
  • the negative connecting piece 3d has a PIN on the bottom.
  • the second end 22 of the positive connecting piece 2 and the second end 32d of the negative connecting piece 3d both extend axially to form corresponding pins.
  • the test dBSPL values of the batteries described in the four embodiments of this application are all smaller than those of the comparative example, so the impact of the corresponding current sound is small.
  • the external connecting piece of the battery shown in Figure 14 is configured as a combination of an "S"-shaped positive electrode connecting piece and a "C"-shaped negative electrode connecting piece, and the two are located on the same axis end side.
  • the first magnetic field and the third magnetic field formed by The two magnetic fields are superimposed on the target area, and the battery performance is more significant.
  • a combined configuration of an "S"-shaped positive electrode connecting piece and an "S"-shaped negative electrode connecting piece can be used to further reduce the possible influence between currents.
  • the first electrical connector (positive electrode connecting piece) and the second electrical connecting member (negative electrode connecting piece) are made of conductive metal sheets.
  • FPC Flexible Printed Circuit, flexible circuit board
  • cables can also be used to make external connectors that build the compensation loop accordingly to simplify the production process and reduce battery costs.
  • Figure 21 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention
  • Figure 22 is an exploded schematic diagram of the assembly of the battery shown in Figure 21.
  • the same functional components or structures are represented by the same symbols in the figures.
  • the battery 10e provided by this embodiment is provided with a positive lead 2e that can construct a compensation circuit on the positive side, and the negative lead 3e and the positive lead 2e are set on the same axis end side.
  • the first end of the positive lead 2e is an adapter piece 21e electrically connected to the pole 152
  • the first end of the negative lead 3e is an adapter fixedly connected to the cover 151 of the cell 1 shell.
  • the connecting piece 31e uses the wire core material as the corresponding conductive body. Compared with the positive electrode connecting piece made of conductive metal sheet, in this embodiment, the outer layer of the positive electrode wire 2e can be effectively insulated.
  • the positive conductor 2e extends roughly in an "S" shape and includes two continuously bent conductor segments, thereby constructing a compensation loop. It also includes a first inflection point A in the extension direction, and the curved section located between the first end (21e) and the first inflection point A is the first conductor section 23e that forms the first magnetic field (inward perpendicular to the paper plane).
  • Figure 23 which is a top view of Figure 21.
  • the negative electrode wire 3e is only used for electrical connection with the load device.
  • the current direction of the first conductor section 23e of the positive electrode wire 2e can be opposite to the current direction of the negative electrode piece of the battery core, thereby generating the first magnetic field.
  • the positive conductor 2e can also be extended in other continuously curved shapes, as long as the positive conductor 2e includes at least one first inflection point A, so that the bent section between the first end and the first inflection point A forms an effective third Any magnetic field is acceptable.
  • the cable itself has a certain degree of flexibility.
  • this embodiment is provided with a positive limiting piece on the shaft end side of the shell of the battery core 1 7.
  • the surface of the positive limiting piece 7 includes a limiting groove 71.
  • the positive conductor 2e made of cable is built into the limiting groove 71.
  • the bending extension direction of the limiting groove 71 is adapted to the posture of the positive conductor 2e. It is required to form a stable first magnetic field in the area where the earphone speaker 20 is located.
  • the positive limiting piece 7 is annular and is mounted on the outer periphery of the pole 152.
  • the limiting groove can also be a groove structure completely built inside the limiting piece body.
  • the posture of the positive lead 2e remains fixed. In other specific implementations, it can also be fixed on the cover 151 of the battery core 1 through a glue dispensing process.
  • the first ends of the positive lead 2e and the negative lead 3e are not limited to being configured as adapter sheets. In other specific implementations, they can be directly electrically connected to the corresponding contact positions through the wire core material (not shown in the figure).
  • Figure 24 is a schematic diagram of the overall structure of another battery provided by an embodiment of the present invention
  • Figure 25 is an exploded schematic diagram of the assembly of the battery shown in Figure 24.
  • the same functional components or structures are represented by the same symbols in the figures.
  • the battery 10f provided by this embodiment is the same as the battery described in Figure 2 and Figure 22.
  • the battery 10f provided by this embodiment has a positive electrode FPC 2f that can construct a compensation circuit on the positive electrode side.
  • the negative electrode connecting piece 3 is made of a conductive metal sheet and is arranged with the positive electrode wire 2e. on the same shaft end side.
  • the flexible base material layer 24f of the positive electrode FPC 2f is embedded with a conductive copper sheet 25f.
  • the conductive copper sheet 25f forms a conductive body, and its first end is a switch electrically connected to the conductive copper sheet 25f.
  • the connecting piece 21f is electrically connected to the pole post 152 through the adapter piece 21f.
  • the flexible base material layer 24f of the positive electrode FPC can be effectively insulated.
  • the flexible base material can be made of polyimide or polyester. film.
  • the conductive body constructed by connecting the adapter piece 21f and the conductive copper sheet 25f is roughly curved and extended in an "S" shape, including two continuously bent conductor segments, and thereby constructs a compensation loop. It also includes a first inflection point A in the extension direction, and the bending section located between the adapter piece 21f and the first inflection point A is the first conductor section 23f that forms the first magnetic field (inward perpendicular to the paper plane).
  • Figure 26 which is a top view of Figure 24.
  • the negative electrode wire 3f is made of conductive metal sheet and is only used for electrical connection with the load device.
  • the current direction of the first conductor section 23f of the positive FPC can be opposite to the current direction of the negative electrode piece of the battery core, thereby generating the first magnetic field.
  • FIG. 27 is an exploded assembly diagram of another battery core provided by an embodiment of the present invention.
  • the same functional components or structures are represented by the same symbols in the figures.
  • the positive tab 12a and the negative tab 13a of the battery core 1a are respectively located on the two axial end sides of the winding core 11.
  • the positive tab 12a is electrically connected to the pole 152
  • the negative tab 13a is electrically connected to the bottom case 14.
  • Both the positive tab 12a and the negative tab 13a are configured to form a structure that bends the current direction when energized, so as to generate a third magnetic field that is opposite to the direction of the eddy current magnetic field of the cell when the battery is powered.
  • the corresponding tab structure is realized based on the notches on the sheet.
  • the direction of the bending current passing through the two is opposite to the current direction of the winding core negative electrode piece, forming a third magnetic field (vertical to the paper surface). Inside).
  • Figure 28 is a top view of Figure 27.
  • the positive pole tab 12a and the negative pole 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 in increasing the intensity of the offset magnetic field; the third magnetic field formed by the other It can assist in increasing the area of low magnetic field area. Overall, the cancellation effect of current sound can be further enhanced.
  • the positive electrode tab and the negative electrode tab are not limited to the structural forms shown in the figure, as long as they can form a curved current direction when energized.
  • An embodiment of the present application also provides an electronic device.
  • the electronic device includes a battery and a load device.
  • the load device is electrically connected to the positive and negative electrodes of the battery.
  • the battery can be as shown in the aforementioned Figures 2 to 5 and Figures 7 to 28 battery as described.
  • the geometric center of the load device is located in the target area.
  • the electronic device may be a product type including a load device, such as but not limited to a speaker of an earphone. It should be understood that other functions of the corresponding electronic device are not the core invention of this application, so they will not be described in detail here.

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Abstract

一种电池及电子设备，该电池包括用于构建补偿回路的第一电连接件，该第一电连接件的第一端位于卷绕中心且与第一极片电连接，在卷芯的轴向的投影面内，该第一电连接件自第一端连续弯曲延伸至第二端，且在延伸方向上包括第一拐点，第一电连接件位于第一端与第一拐点之间的弯曲段为第一导体段；第一电连接件的第一端与第一拐点的连线为第一参考线，第一参考线与第一导体段围合形成第一包围区域，且目标区域部分或者全部位于第一包围区域内，并配置为：电池处于供电状态时，第一电连接件的第一导体段可在目标区域构建形成面积较大的低磁场区，可有效降低卷芯涡流磁场对负载器件可能产生的影响。在应用场景下，可避免该涡流磁场的干扰。

Description

一种电池及电子设备
本申请要求于2022年08月29日提交中国专利局的申请号为202211042957.3、发明名称为“一种电池及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及电池结构设计技术领域，尤其涉及一种电池及电子设备。
背景技术
无线耳机(true wireless earphone，TWS)以尺寸小巧、方便携带、不受线材约束等优点得以快速发展和应用。TWS耳机电池以纽扣型锂电池为主流，其电芯结构大多采用“卷绕”的方式进行装配，卷绕结构电池在充放电的过程中，电流沿着卷绕成圆筒状的极片流动形成涡流，根据电磁感应原理，电流的变化会产生涡流磁场。请参见图1，该图示出了现有一种典型电池卷芯的卷绕结构示意图。图1中，长点虚线所示为负极片，短点虚线所示为正极片，实线所示为正、负极片间的隔膜。
在卷绕电芯中，正极极片和负极极片中的电流大小相同、方向相反，能够在一定程度上相互抵消产生的感应磁场。但是，在电池结构设计中出于安全考虑，电池的负极极片的长度往往大于正极极片，同时正负极极片的磁导率存在差异，因此，卷绕电芯工作过程中不可避免地会形成涡流磁场，该涡流磁场和耳机线圈相互作用产生噪音，直接影响产品音质，降低了用户的使用体验。
发明内容
本申请实施例提供了一种电池及电子设备，能够有效降低电池供电产生的涡流磁场对负载器件的干扰，提升使用体验。
本申请实施例第一方面提供了一种电池，包括：电芯和第一电连接件，该电芯包括外壳和设置在外壳内部的卷芯，卷芯包括由第一极片、隔膜和第二极片卷绕形成的卷芯结构；其第一电连接件用于构建补偿回路，其第一端位于卷绕中心且与第一极片电连接，第一电连接件的第二端相对于第一端远离卷绕中心且用于与外部负载电连接；在卷芯的轴向投影面内，该第一电连接件自第一端连续弯曲延伸至第二端，且在延伸方向上包括第一拐点，第一电连接件位于第一端与第一拐点之间的弯曲段为第一导体段；第一电连接件的第一端与第一拐点的连线为第一参考线，第一参考线与第一导体段围合形成第一包围区域，且目标区域部分或者全部位于该第一包围区域内，其中，目标区域为卷芯的局部区域在轴向的投影区域；并配置为：电池处于供电状态时，第一电连接件的第一导体段可在目标区域产生第一磁场，第一磁场与卷芯产生的磁场方向相反。如此设置，通过连续弯曲延伸的第一电连接件构建补偿回路，并基于补偿回路的第一导体段构建的第一包围区域覆盖目标区域的部分或者全部，在目标区域形成了收敛效果优异的磁场区域，由此，能够在相应的目标区域构建形成面积较大的低磁场区，可有效降低卷芯涡流磁场对负载器件可能产生的影响。应用该电池的电子设备负载器件，在该特定区域得以避免受到该涡流磁场的干扰。
另外，基于该第一电连接件所形成的较大低磁场区，以该电池应用于无线耳机为例，电池和耳机之间具有更大的相对位置裕度，以及更高的容错率，此外，基于该电池结构获得的较高容错率，产品良率得以进一步提升。
示例性的，第一极片可以为正极片，第二极片为负极片；或者，第一极片可以为负极片，第二极片为正极片。
在一些实际应用中，该第一电连接件包括至少两段连续弯曲的导体段，且至少包括一个第一拐点，具体可根据应用场景进行结构设定，具有较好的可适应性。
基于第一方面，本申请实施例还提供了第一方面的第一种实施方式：还包括第二电连接件，该第二电连接件的第一端与第二极片电连接，第二电连接件的第二端用于与外部负载电连接；并配置为：电池处于供电状态时，第二电连接件可产生第二磁场，第二磁场与卷芯产生的磁场方向相反。也就是说，负极连接片也可配置为可抵消涡流磁场的结构形式，进一步降低卷芯涡流磁场可能产生的影响。
基于第一方面的第一种实施方式，本申请实施例还提供了第一方面的第二种实施方式：电池处于供电状态时，该第二电连接件的第二导体段可在目标区域产生第二磁场。这样，在正极连接片所形成补偿回路的基础上，负极连接片产生的第二磁场可辅助增抵消磁场的强度，增强电流音的抵消效果。
基于第一方面的第二种实施方式，本申请实施例还提供了第一方面的第三种实施方式：第二电连接件的第一端位于卷绕中心，且第二电连接件的第二端相对于第一端远离卷绕中心；在卷芯的轴向投影面内，第二电连接件自第一端连续弯曲延伸至第二端，且在延伸方向上包括第二拐点，第二电连接件位于第一端与第二拐点之间的弯曲段为第二导体段，第二电连接件的第一端与第二拐点的连线为第二参考线，第二参考线与第二导体段围合形成第二包围区域，且目标区域部分或者全部位于第二包围区域内。示例性地，第一电连接件和第二电连接件均采用“S”字型的连接片，基于该组合配置的电池，第一电连接件和第二电连接件所形成的抵消磁场叠加在目标区域，电池性能得以更加显著。
在实际应用中，该第二电连接件包括至少两段连续弯曲的导体段，且至少包括一个第二拐点。同样，可根据应用场景进行结构设定，可适应性较好。
基于第一方面的第一种实施方式，本申请实施例还提供了第一方面的第四种实施方式：第二电连接件的弯曲曲率与卷芯的卷绕曲率大致相同，且第二电连接件与卷芯结构大致同轴设置。如此设置，在第一电连接件所形成补偿回路的基础上，第二电连接件产生的第二磁场可辅助增大低磁场区的区域面积，进一步增强电流音的抵消效果。
示例的，第一电连接件的第二端和第二电连接件的第二端中，一者的第二端配置在电芯的顶部、底部或侧部，另一者配置在电芯的顶部、底部或侧部。
在实际应用中，该第一电连接件配置在外壳的第一轴端侧，第二电连接件配置在外壳的第一轴端侧、第二轴端侧或者周壁；定义第一轴端侧和第二轴端侧分别为电芯的外壳两个轴向相对的端侧。在具体应用场景下，可根据实际装配关系进行适应性配置。
基于第一方面的第五种实施方式，本申请实施例还提供了第一方面的第五种实施方式：卷芯还包括第一极极耳和第二极极耳，第一极极耳和第二极极耳配置为：电池处于供电状态时，两者中至少一者可在目标区域产生第三磁场，第三磁场与卷芯产生的磁场方向相反。基于具有预定夹角的第一极极耳和第二极极耳，其中一者可在耳目标区域形成该第三磁场，可辅助增加抵消磁场的强度；另一者形成的第三磁场可辅助增大低磁场区的区域面积，由此能够进一步增强电流音的抵消效果。
基于第一方面的第二种实施方式，或第一方面的第三种实施方式，或第一方面的第四种实施方式，或第一方面的第五种实施方式，本申请实施例还提供了第一方面的第六种实施方式：第一电连接件和第二电连接件中，至少第一电连接件采用导电金属片材制成；第一电连接件与外壳绝缘设置，且至少在外壳的盖板与第一电连接件之间设置有极间绝缘垫片。作为优选，两个外部连接件均可采用导电金属片材制成，例如但不限于，可以为不锈钢片，镍片，镀镍钢片，铜片中的一种，组装后，基于极间绝缘垫片的设置，可完全规避极间短路。
示例性的，该极间绝缘垫片为圆环状，极间绝缘垫片可套装在极柱的外周且两者之间具有绝缘间距。结构简单紧凑，且工艺性较好。
基于第一方面的第二种实施方式，或第一方面的第三种实施方式，或第一方面的第四种实施方式，或第一方面的第五种实施方式，本申请实施例还提供了第一方面的第七种实施方式：第一电连接件和第二电连接件中，至少第一电连接件采用FPC制成。这样，可简化生产工艺，降低电池成本。
示例性的，该FPC基材片为圆环状，且套装在极柱的外周。结构较为紧凑合理。
基于第一方面的第二种实施方式，或第一方面的第三种实施方式，或第一方面的第四种实施方式，或第一方面的第五种实施方式，本申请实施例还提供了第一方面的第八种实施方式：第一电连接件和第二电连接件中，至少第一电连接件采用具有包覆层的线缆制成。同样地，可简化生产工艺，降低电池成本。
基于第一方面的第八种实施方式，本申请实施例还提供了第一方面的第九种实施方式：在外壳 上设置有限位片，且限位片的表面包括限位槽，采用线缆制成的第一电连接件内置于限位槽中。如此设置，能够保持导线芯材的第一导体段处于稳定姿态，在此基础上，可在目标区域形成稳定的第一磁场，确保消除电流间的效果。
在实际应用中，该限位槽还可以为完全内置于在限位片本体内部的槽结构；在其他应用中，还可以通过点胶工艺将其固定。
本申请实施例第二方面提供了一种电子设备，包括电池及与电池电连接的负载器件，该电池采用如前所述的电池，在卷芯的轴向的投影面内，该负载器件的几何中心位于所述目标区域内。
在一些实际应用中，该电子设备可以为具有负载器件不同设备类型。示例性的，该电子设备可以为耳机，负载器件为耳机的喇叭。
附图说明
图1为现有一种典型电池卷芯的卷绕结构示意图；
图2为本发明实施例提供的一种电池的整体结构示意图；
图3为图2中所示电池的装配爆炸示意图；
图4为本发明实施例提供的一种电芯的装配爆炸示意图；
图5为图2的俯视图；
图6为基于图2所示电池形成的磁场强度仿真图；
图7为本发明实施例提供的另一种电池的整体结构示意图；
图8为图7中所示电池的另一角度示意图；
图9为图7中所示电池的装配爆炸示意图；
图10为图7的俯视图；
图11为本发明实施例提供的又一种电池的整体结构示意图；
图12为图11中所示电池的装配爆炸示意图；
图13为图11的俯视图；
图14为本发明实施例提供的另一种电池的整体结构示意图；
图15为图14中所示电池的装配爆炸示意图；
图16为图14的俯视图；
图17为本发明实施例提供的又一种电池的整体结构示意图；
图18为图17中所示电池的另一角度示意图；
图19为图17中所示电池的装配爆炸示意图；
图20为图17的俯视图；
图21为本发明实施例提供的另一种电池的整体结构示意图；
图22为图21中所示电池的装配爆炸示意图；
图23为图21的俯视图；
图24为本发明实施例提供的又一种电池的整体结构示意图；
图25为图24中所示电池的装配爆炸示意图；
图26为图24的俯视图；
图27为本发明实施例提供的另一种电芯的装配爆炸示意图；
图28为图27的俯视图。
具体实施方式
本申请实施例提供了一种基于卷芯结构的电池，通过结构改进优化可有效降低电池供电产生的涡流磁场对负载器件的干扰，显著提升用户体验。
现有技术中，卷绕电芯在工作过程中不可避免地形成涡流磁场，在相应应用场景下，该涡流磁场的存在不同程度地影响着产品使用体验。以耳机为例，该涡流磁场和耳机线圈相互作用产生噪音，降低耳机的音质。
基于此，本申请实施例提供了一种电池，该电池包括电芯和可导电的第一电连接件，该电芯包括外壳和卷芯，其中，卷芯包括由第一极片、隔膜和第二极片卷绕形成的卷芯结构，具体地，通过卷绕工艺按照第一极片-隔膜-第二极片-膈膜的顺序，或者按照第二极片-隔膜-第一极片-膈膜的顺序卷绕形成螺旋卷芯结构，卷芯设置在外壳内部。对于卷绕形成的卷芯结构配置来说，第一极片可以为正极片，相应地第二极片可以为负极片；或者，第一极片可以为负极片，相应地第二极片可以为正极片。通常，电池的第一极片和第二极片的长度可以不同，例如但不限于负极极片长度大于正极极片长度的情形，同时，两者基于不同材料特性具有不同的磁导率。由此，电池处于供电状态或充电状态时，该卷绕电芯将在工作过程中产生涡流磁场(例如图1中所示垂直纸面向里的情形)。
本实施方案中，第一电连接件的第一端位于卷绕中心，且该第一端与第一极片电连接，第一电连接件的第二端相对于第一端远离卷绕中心，且该第二端用于与外部负载电连接。其中，在卷芯的轴向投影面内，该第一电连接件自第一端连续弯曲延伸至第二端，且该第一电连接件在延伸方向上包括第一拐点。
这里，“拐点”是指该连续弯曲的导电连接件改变了弯曲方向的点位，相当于数学概念中连续曲线的凹弧与凸弧的分界点；“轴向”是指与卷芯的卷绕中心线平行的方向。同时，在卷芯的轴向投影面内，第一电连接件的第一端与第一拐点的连线为第一参考线；第一参考线与第一导体段围合形成第一包围区域内，且目标区域部分或者全部位于第一包围区域内，该目标区域为卷芯的局部区域在轴向的投影区域。也即，目标区域为需要避免涡流磁场干扰的负载器件所在位置处，该负载器件为电子设备中对磁场敏感的器件。可以理解的是，该目标区域可大于或小于负载器件所在区域，也可相对于负载器件所在区域存在少量偏移，而非局限于与负载器件完全重合一致。
具体地，该第一电连接件的第一导体段可在目标区域产生第一磁场，第一磁场与卷芯产生的磁场方向相反。也就是说，通过连续弯曲延伸的第一电连接件构建补偿回路，并基于补偿回路的第一导体段构建的第一包围区域覆盖目标区域的部分或者全部，在目标区域形成了收敛效果优异的磁场区域，由此，能够在相应的目标区域构建形成面积较大的低磁场区，可有效降低卷芯涡流磁场对负载器件可能产生的影响。应用该电池的电子设备负载器件，在该特定区域得以避免受到该涡流磁场的干扰。
与此同时，基于该第一电连接件所形成的较大低磁场区，以该电池应用于无线耳机为例，电池和耳机之间具有更大的相对位置裕度，以及更高的容错率，此外，基于该电池结构获得的较高容错率，产品良率得以进一步提升。
为了更好地理解本申请的技术方案和技术效果，不失一般性，以下将结合附图以无线耳机作为该电池10的应用场景，并以第一极片为正极片、第二极片为负极片的配置方式，对具体实施例进行详细的描述。请参见图2和图3，其中，图2为本发明实施例提供的一种电池的整体结构示意图，图3为图2中所示电池的装配爆炸示意图。
如图2和图3所示，该电池10的正极连接片2设置在电芯1的第一轴端侧，也即极柱152所在侧，该正极连接片2为与正极片电连接的第一电连接件；其负极连接片3也设置在该第一轴端侧，该负极连接片3为与负极片电连接的第二电连接件，且仅用于与负载器件建立电连接。该电池10还包括一定位件5，该定位件5相对于电芯1外壳向旁侧伸出，用于电池的组装定位。
该电芯1的卷芯11内置于由底壳14和顶盖15围合形成的外壳中，请一并参见图4，该图为本实施方案中所述电芯1的装配爆炸示意图。该底壳14包括轴端开口，顶盖15与该底壳14的轴端开口封固连接，以容纳卷芯11。
这里，底壳14和盖板151的材料可以为材质为不锈钢或者铝合金，具体地，底壳14与顶盖15的盖板151之间可采用焊接工艺连接，例如但不限于，激光焊接或者超声波焊接。
如图3和图4所示，顶盖15的盖板151中部插装设置极柱152，且两者之间设置有正负极绝缘垫圈153。正极极耳12与正极极片连接，负极极耳13与负极极片连接。本实施方案中，极柱152与正极极耳12，为电芯1的正极；外壳14和盖板151与负极极耳13连接，为电芯的负极。
其中，正极连接片2与极柱152电连接，并通过极柱152以及正极极耳12与正极极片连接；该正极连接片2的第一端21位于卷绕中心，其第二端22相对于第一端21远离卷绕中心设置。负 极连接片3的第一端31与盖板151电连接，这里，负极连接片3的第二端32与正极连接片2的第二端22周向间隔设置，且两者均为轴向延伸形成的分别用于与耳机扬声器(speaker，SPK)电连接。负极连接片3的第二端32和正极连接片2的第二端22，均为位顶部轴向延伸的引脚形式，也即顶部出PIN。
该正极连接片2采用导电金属片材制成，在负极盖板151与导电金属片材形成的正极连接片2之间设置有极间绝缘垫片4，以避免两者之间短路。该极间绝缘垫片4的材质可以根据实际产品设计要求选择，例如但不限于，PPS(Polyphenylene sulfide，聚苯硫醚)，PFA(Polyfluoroalkoxy，可溶性聚四氟乙烯)，PEEK(polyetheretherketone，聚醚醚酮)中的一种。
本实施方案中，极间绝缘垫片4为圆环状，并套装在极柱152的外周，两者之间具有可形成安全距离的绝缘间距P。具体地，在该极间绝缘垫片4与负极连接片3的相应位置处，开设有引脚通过口41，以便与盖板151连接的负极连接片3引脚伸出。
在其他具体应用中，可以配置为其他形状的极间绝缘垫片，例如但不限于，采用与正极连接片2的导电本体形状相同，或者外廓比其导电本体略大的极间绝缘垫片，同样能够避免导电金属片材制成的正极连接片2与盖板151短接。
具体来说，在卷芯11的轴向投影面内，该正极连接片2的导电本体自第一端21连续弯曲延伸至第二端22，请一并参见图5，该图为图2的俯视图。图中标号L所示的第一参考线连接在正极连接片2的第一端21与第一拐点A之间。本实施方案中，目标区域为图中虚线所示的耳机扬声器20所在位置处，其部分或者全部位于第一参考线L与第一导体段23围合形成的第一包围区域内，也即，该耳机扬声器20位于正极连接片2的第一端21与第二端22之间的连线上。
该正极连接片2大致呈“S”字型弯曲延伸，也即包括两段连续弯曲的导体段，并以此构建补偿回路。这里，“S”字型用于表达具有依次连接的凹弧段和凸弧段，可以理解的是，弯曲延伸的正极连接片2并非具有完全依据“S”字型延伸趋势形成的本体形状，在具体实现时，可根据结构强度及工艺可行性确定为非等截面的形态。
这里，该正极连接片2的延伸方向上包括第一拐点A，位于第一端21与第一拐点A之间的弯曲段为形成第一磁场的第一导体段23，其中，第一参考线L与该第一导体段23相交。如图5所示，该第一导体段21与第一端21邻接的部分位于第一参考线L的一侧，第一导体段21与第一拐点A邻接的部分位于第一参考线L的另一侧。
对于电芯负极片为涡流磁场产生主体的情形来说，电池供电状态下，该正极连接片2中的电流走向与卷芯11内部负极片中的电流走向相反，即可在耳机扬声器20(目标区域)所在位置处形成可抵消涡流磁场的第一磁场(图5中所示垂直纸面向外)；反之，对于电芯正极片为涡流磁场产生主体的情形来说，电池供电状态下，该正极连接片2中的电流走向与卷芯11内部正极片电流走向相反，同样可在耳机扬声器20(目标区域)所在位置处形成可抵消涡流磁场的第一磁场。
本方案中，用于形成第一磁场的第一导体段23包覆角相对较大，近似于一个闭合的环路。可形成收敛效果优异的磁场区域，请一并参见图6，该图为基于图2所示电池形成的磁场强度仿真图。图6所示，应用本申请实施例，可在耳机扬声器所在位置处，针对性地构建形成面积较大的低磁场区，由此有效消除耳机中的涡流磁场噪音。同时，在适配耳机的应用场景下，基于一套本方案提供的电池解决方案可应用左右耳机，并解决左右耳涡流噪音的问题，在不额外增加生产组装难度的基础上，能够合理控制制造成本和管理成本。
需要说明的是，该正极连接片2还可以采用其他连续弯曲形态延伸形成，当然，在其他具体实现中，该正极连接片2需要包括至少一个第一拐点A，以便位于第一端21与第一拐点A之间的弯曲段形成有效的第一磁场。
另外，在其他具体实现中，该正极连接片的连续弯曲形态及配置方式，可基于右手螺旋定则同理转换适用于负极侧，可以理解的是，对于相同涡流磁场产生主体，反向弯曲形成相应的导电本体弯曲段，同样能够在目标区域构建较大面积的低磁场区。当然，对于电芯1外壳(底壳14、盖板151)作为负极的基础配置，采用该连续弯曲形态的负极连接片，其位于卷绕中心设置的第一端需要与底壳14的中心位置电连接，同时还需要在该负极连接片的导电本体与底壳之间设置必要的绝 缘结构(图中未示出)。
此外，负极连接片3可采用不同的引脚形式，例如但不限于普通缆线，或者通过电池外壳与外部器件接触电连接，只要满足电池负极与外部负载相连接的功能需要即可。
请一并参见图7、图8和图9，其中，图7为本发明实施例提供的另一种电池的整体结构示意图，图8为图7中所示电池的底部角度形成的示意图，图9为图7中所示电池的装配爆炸示意图。
如图所示，该电池10a的电芯1和正极连接片2a与前述实施例相同，负极连接片3a采用导电金属片材制成，整体为大致呈“C”字型，且仅用于与负载器件电连接。这里，为了清楚示明本实施方案与前述方案的区别和联系，相同功能的构成或结构以同一标记进行示意。
本实施方案中，大致呈的负极连接片3a位于电芯1外壳的底部，也即位于与正极连接片2轴向相对的另一轴端侧，并如图8所示沿外壳的底部外沿周向延伸形成，例如但不限于，可采用激光焊接、超声焊接或电阻焊接实现其与电芯外壳的连接。这里，根据产品总体设计要求，正极连接片2a和负极连接片3a的材质可以采用不锈钢片、镍片、镀镍钢片或铜片。
电池10a供电状态下，本实施方案的正极连接片2a产生的第一磁场，与前述图2所描述的实施例相同。具体请参见图10，该图为图7的俯视图。图中所示，正极连接片2a产生的第一磁场(垂直纸面向外)，可在耳机扬声器20所在目标区域抵消电芯形成的涡流磁场(如图1所示垂直纸面向外)，形成有效避免干扰的低磁场区。
其中，正极连接片2a和负极连接片3a均为侧面出PIN。如图所示，正极连接片2a和负极连接片3a分别延伸至所在轴端侧的外周边缘后，再沿电芯1的外壳轴向相向延伸，并分别形成正极连接片2a的第二端22a引脚和负极连接片3a的第二端32a引脚。
对于侧面出PIN的方式，电芯1外壳的外周表面覆有绝缘胶纸6a。当然，在具体应用中，绝缘胶纸6a可以全周向包覆用于实现正极侧第二端22a引脚和负极侧第二端32a引脚之间的有效绝缘，还可以在相应位置处设置其他绝缘结构，例如但不限于采用绝缘片的实现形式。
另外，本实施方案中，用于电池组装定位的定位件与负极连接片3a一体成型，具体地，该定位部5a自“C”字型的负极连接片3a向旁侧延伸形成。相较于独立设置的定位件，本方案结构简单易于实现，组装工艺性较好。当然，在其他具体实现中，负极连接片可采用不同形态，例如但不限于，采用直条带状延伸至相对侧形成该定位部，
为了进一步降低卷芯涡流磁场可能产生的影响，负极连接片也可配置为可抵消涡流磁场的结构形式。请一并参见图11和图12，其中，图11为本发明实施例提供的又一种电池的整体结构示意图，图12为图11中所示电池的装配爆炸示意图。同样，为了清楚示明本实施方式与前述实施例的区别和联系，相同的功能构成或结构在图中以同一标记进行示意。
本实施方案中，该电池10b的正极连接片2(第一电连接件)与负极连接片3b(第二电连接件)，均位于极柱152所在的轴端侧。其中，正极连接片2大致呈“S”字型弯曲延伸，并通过其第一端与第一拐点之间的第一导体段23形成第一磁场(垂直纸面向内)，请一并参见图13，该图为图11的俯视图。
该负极连接片3b能够形成单独的补偿回路，可产生第二磁场(垂直纸面向内)，该第二磁场与卷芯11内部产生的涡流磁场方向相反。换言之，本实施方案提供的电池，采用正极连接片与负极连接片均作为可形成补偿回路的外部连接件。
具体来说，负极连接片3b大致呈“C”字型，其弯曲曲率与卷芯的卷绕曲率大致相同，且沿电芯外壳的周沿布置，与卷芯结构大致同轴设置。这里的，负极连接片3b的弯曲曲率与卷芯的卷绕曲率大致相同，及与卷芯结构大致同轴设置曲率大致相同，包括在加工组装工艺精度允许的范围内存在一定的偏差，而非指定完全相同或相等。
本实施方案中，负极连接片3b的第一端31b与电芯1的盖板151电连接，且其第一端31b与第二端32b之间弯曲段为负极连接片3b的第二导体段33b，同时，在第二导体段33b与盖板151之间可覆有绝缘胶纸6b。在其他具体实现中，用于建立绝缘以便第二导体段33b中形成相应电流走向的绝缘关系，也可以采用其他绝缘结构，例如但不限于，在与盖板151相对的第二导体段33b表面上一体成型绝缘层结构。
电池处于供电状态时，负极连接片3b的第二导体段33b的电流方向可与电芯负极片的电流方向相反，由此可产生该第二磁场。这样，在正极连接片2所形成补偿回路的基础上，负极连接片3b产生的第二磁场可辅助增大低磁场区的区域面积，进一步增强电流音的抵消效果。
其中，正极连接片2和负极连接片3b均为顶面出PIN，正极连接片2的第二端22和负极连接片3b的第二端32b均轴向延伸形成相应的引脚，且周向间隔设置。
为了能够辅助增加抵消磁场的强度，该负极连接片产生的第二磁场可形成在目标区域。请一并参见图14和图15，其中，图14为本发明实施例提供的另一种电池的整体结构示意图，图15为图14中所示电池的装配爆炸示意图。为了清楚示明本实施方式与前述实施例的区别和联系，相同的功能构成或结构在图中以同一标记进行示意。
本实施方案中，该电池10c的正极连接片2与负极连接片3c，均位于极柱152所在的轴端侧。其中，正极连接片2大致呈“S”字型弯曲延伸，并通过其第一端与第一拐点之间的第一导体段23形成第一磁场(垂直纸面向内)，请一并参见图16，该图为图14的俯视图。图16中未示出设置在正极连接片2与负极连接片3c之间的极间绝缘垫片4，以清楚示意正极连接片2和负极连接片3c所产生的抵消磁场。
该负极连接片3c在耳机扬声器20所在区域产生第二磁场(垂直纸面向内)，该第二磁场与卷芯11内部产生的涡流磁场方向相反。
具体来说，负极连接片3c大致呈“C”字型，其第一端31c与电芯1的盖板151电连接，且其第一端31c与第二端32c之间弯曲段为负极连接片3c的第二导体段33c，同时，在第二导体段33c与盖板151之间覆有绝缘胶纸6c。应当理解，本实施方案中第二导体段33c的结构形式及适配于其与盖板151之间的绝缘胶纸6c，与前述图11所描述的实施方案中相同；两者区别在于，本方案的第二导体段33c和第一导体段23位于卷绕中心的同侧。
电池处于供电状态时，负极连接片3c的第二导体段33c的电流方向可与电芯负极片的电流方向相反，由此可产生该第二磁场。这样，在正极连接片2所形成补偿回路的基础上，负极连接片3c产生的第二磁场可辅助增抵消磁场的强度，增强电流音的抵消效果。
其中，正极连接片2和负极连接片3c均为顶面出PIN，正极连接片2的第二端22和负极连接片3c的第二端32c均轴向延伸形成相应的引脚，且周向间隔设置。
前述可产生抵消磁场的负极连接片，与正极连接片设置在电芯的同一轴端侧。根据不同应用场景下组装需求，两者可相对设置在电芯1的两轴端侧。请一并参见图17、图18和图19，其中，图17为本发明实施例提供的另一种电池的整体结构示意图，图18为图17中所示电池的底部视角形成的示意图，图19为图17中所示电池的装配爆炸示意图。
本实施方案中，该电池10d的正极连接片2位于极柱152所在的轴端侧，负极连接片3d位于与正极连接片2轴向相对的另一轴端侧，也即位于电芯1的底壳底部。其中，正极连接片2大致呈“S”字型弯曲延伸，并通过其第一端与第一拐点之间的第一导体段23形成第一磁场(垂直纸面向内)，请一并参见图20，该图为图17的俯视图。图20中未示出卷芯11和极间绝缘垫片4等构成，以清楚示意正极连接片2和负极连接片3d所产生的抵消磁场。
负极连接片3d大致呈“C”字型，其第一端31d与电芯1的底壳14底面电连接，且其第一端31d与第二端32d之间弯曲段为负极连接片3d的第二导体段33d，第二导体段33d与底壳14之间覆有绝缘胶纸6d。本实施方案中第二导体段33d的结构形式及适配于其与底壳14之间的绝缘胶纸6d，与前述图14所描述的实施方案中配置机理相同，区别在于，本方案的负极连接片3d适配绝缘胶纸的结构成形方向不同。
电池处于供电状态时，负极连接片3d的第二导体段33d的电流方向可与电芯负极片的电流方向相反，由此可产生该第二磁场(垂直纸面向内)。这样，在正极连接片2所形成补偿回路的基础上，负极连接片3d产生的第二磁场也可辅助增抵消磁场的强度。
其中，正极连接片2为顶面出PIN，负极连接片3d为底面出PIN，正极连接片2的第二端22和负极连接片3d的第二端32d均轴向延伸形成相应的引脚。
针对图7、图11、图14和图17所描述的电池，以现有通过外电路进行磁场抵消的电池作为对 比例，分别进行供电dBSPL(以声压作为测量量的分贝)测试。测试数据如下表1所示。
结合上表数据所示，本申请四个实施例描述电池，测试dBSPL数值均小于对比例，由此相应电流音影响均较小。其中，图14所示电池的外部连接片配置为“S”字型正极连接片和“C”字型负极连接片的组合，且两者位于同一轴端侧，所形成的第一磁场和第二磁场叠加在目标区域，电池性能得以更加显著。
在其他具体实现方式中，还可以采用“S”字型正极连接片与“S”字型负极连接片的组合配置方式，可进一步降低电流间可能产生的影响。
前述各实施例中，第一电连接件(正极连接片)和第二电连接件(负极连接片)均采用导电金属片材制成。在其他具体实现中，还可以采用FPC(Flexible Printed Circuit，柔性电路板)或线缆制成相应构建补偿回路的外部连接件，以简化生产工艺，降低电池成本。
请参见图21和图22，其中，图21为本发明实施例提供的另一种电池的整体结构示意图，图22为图21中所示电池的装配爆炸示意图。为了清楚示明本实施方式与前述实施例的区别和联系，相同的功能构成或结构在图中以同一标记进行示意。
与前述图2所描述电池相同，本实施方案提供的电池10e，在正极侧设置可构建补偿回路的正极导线2e，负极导线3e与正极导线2e设置在相同的轴端侧。如图21和图22所示，正极导线2e的第一端为与极柱152电连接的转接片21e，负极导线3e的第一端为与电芯1外壳的盖板151固定连接的转接片31e，以导线芯材作为相应的导电本体。相较于采用导电金属片材制成的正极连接片，本实施方案中，正极导线2e的外层线皮可有效绝缘。
其中，正极导线2e大致呈“S”字型弯曲延伸，包括两段连续弯曲的导体段，并以此构建补偿回路。且在延伸方向上包括第一拐点A，位于第一端(21e)与第一拐点A之间的弯曲段为形成第一磁场(垂直纸面向内)的第一导体段23e。请一并参见图23，该图为图21的俯视图。其中，负极导线3e仅用于与负载器件电连接。
电池处于供电状态时，正极导线2e的第一导体段23e的电流方向可与电芯负极片的电流方向相反，由此可产生该第一磁场。
在具体实现中，正极导线2e也可以采用其他连续弯曲形态延伸形成，只要该正极导线2e包括至少一个第一拐点A，以便位于第一端与第一拐点A之间的弯曲段形成有效的第一磁场均可。
另外，对于正极导线2e来说，线缆自身具有一定的柔性，为了使得导线芯材的第一导体段23e保持稳定姿态，本实施方案在电芯1的外壳轴端侧设置有正极限位片7，该正极限位片7的表面包括限位槽71，采用线缆制成的正极导线2e内置于该限位槽71，该限位槽71的弯曲延伸方向适配于正极导线2e的姿态要求，以形成在耳机扬声器20所在区域形成稳定的第一磁场。
本实施方案中，正极限位片7为套装在极柱152外周的圆环状，在可靠固定该正极导线2e的基础上，整体结构布局更加紧凑合理。在具体实现中，限位槽还可以为完全内置于在限位片本体内部的槽结构。
对于正极导线2e的姿态保持固定，在其他具体实现中，还可以通过点胶工艺将其固定在电芯1的盖板151上。此外，正极导线2e和负极导线3e的第一端非局限于配置为转接片的方式，在其他具体实现中，可通过导线芯材直接与相应接点位置电连接(图中未示出)。
请参见图24和图25，其中，图24为本发明实施例提供的又一种电池的整体结构示意图，图25为图24中所示电池的装配爆炸示意图。为了清楚示明本实施方式与前述实施例的区别和联系， 相同的功能构成或结构在图中以同一标记进行示意。
与前述图2和图22所描述电池相同，本实施方案提供的电池10f，在正极侧设置可构建补偿回路的正极FPC2f，负极连接片3采用导电金属片材制成，且与正极导线2e设置在相同的轴端侧。如图24和图25所示，该正极FPC2f的柔性基材层24f内嵌装有导电铜皮25f，导电铜皮25f形成导电本体，且其第一端为与导电铜皮25f电连接的转接片21f，并通过该转接片21f与极柱152电连接。相较于采用导电金属片材制成的正极连接片，本实施方案中，正极FPC的柔性基材层24f可有效绝缘，例如但不限于，该柔性基材可采用聚酰亚胺或聚酯薄膜。
其中，转接片21f和导电铜皮25f连接构建的导电本体大致呈“S”字型弯曲延伸，包括两段连续弯曲的导体段，并以此构建补偿回路。且在延伸方向上包括第一拐点A，位于转接片21f与第一拐点A之间的弯曲段为形成第一磁场(垂直纸面向内)的第一导体段23f。请一并参见图26，该图为图24的俯视图。其中，负极导线3f采用导电金属片材制成，且仅用于与负载器件电连接。
电池处于供电状态时，正极FPC的第一导体段23f的电流方向可与电芯负极片的电流方向相反，由此可产生该第一磁场。
为了进一步提高抵消涡流磁场的能力，可以针对电芯内部的极耳作进一步优化，请参见图27，该图为本发明实施例提供的另一种电芯的装配爆炸示意图。为了清楚示明本实施方式与前述实施例的区别和联系，相同的功能构成或结构在图中以同一标记进行示意。
该电芯1a的正极极耳12a和负极极耳13a分别位于卷芯11的两轴端侧，正极极耳12a与极柱152电连接，负极极耳13a与底壳14电连接。正极极耳12a和负极极耳13a均配置为通电时可形成弯曲电流方向的结构形式，以在电池供电状态下产生可与电芯涡流磁场方向相反的第三磁场。
如图27所示，本实施方案中，基于片材上的凹口实现相应的极耳结构。正极极耳12a上具有凹口121a，负极极耳13a上具有凹口131a，电池供电时，通过两者的弯曲电流方向与卷芯负极极片的电流走向相反，形成第三磁场(垂直纸面向内)。请一并参见图28，该图为图27的俯视图。
对于具有预定夹角的正极极耳12a和负极极耳13a，其中一者可在耳机扬声器20所在的目标区域形成该第三磁场，可辅助增加抵消磁场的强度；另一者形成的第三磁场可辅助增大低磁场区的区域面积。整体上，能够进一步增强电流音的抵消效果。
另外，在其他具体实现中，正极极耳和负极极耳非局限于图中所示的结构形式，只要能够在通电时可形成弯曲电流方向均可。
本申请实施例还提供了一种电子设备，该电子设备包括电池和负载器件，该负载器件与电池的正、负极电连接，该电池可以为如前述图2至图5及图7至图28所描述的电池。在卷芯的轴向投影面内，所述负载器件的几何中心位于所述目标区域内。
该电子设备可以为包括负载器件的产品类型，例如但不限于耳机的喇叭。应当理解，相应电子设备的其他功能构成非本申请的核心发明点所在，故本文不再赘述。
以上仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (18)

  1. 一种电池，其特征在于，包括：电芯和第一电连接件，所述电芯包括外壳和设置在所述外壳内部的卷芯，所述卷芯包括由第一极片、隔膜和第二极片；
    所述第一电连接件的第一端位于所述卷芯的中心且与所述第一极片电连接，所述第一电连接件的第二端相对于第一端远离卷绕中心且用于与外部负载电连接；
    在所述卷芯的轴向的投影面内，所述第一电连接件自第一端连续弯曲延伸至第二端，且在延伸方向上包括第一拐点，所述第一电连接件位于所述第一端与所述第一拐点之间的弯曲段为第一导体段；所述第一电连接件的第一端与所述第一拐点的连线为第一参考线，所述第一参考线与所述第一导体段围合形成第一包围区域，且目标区域部分或者全部位于所述第一包围区域内，所述目标区域为所述卷芯的局部区域在轴向的投影区域；
    并配置为：所述电池处于供电状态时，所述第一电连接件的第一导体段可在所述目标区域产生第一磁场，所述第一磁场与所述卷芯产生的磁场方向相反。
  2. 根据权利要求1所述的电池，其特征在于，所述第一电连接件包括至少两段连续弯曲的导体段，且至少包括一个所述第一拐点。
  3. 根据权利要求1或2所述的电池，其特征在于，还包括第二电连接件，所述第二电连接件的第一端与所述第二极片电连接，所述第二电连接件的第二端用于与外部负载电连接；并配置为：所述电池处于供电状态时，所述第二电连接件可产生第二磁场，所述第二磁场与所述卷芯产生的磁场方向相反。
  4. 根据权利要求3所述的电池，其特征在于，所述第二电连接件包括第二导体段，所述第二导体段在所述目标区域产生所述第二磁场。
  5. 根据权利要求4所述的电池，其特征在于，所述第二电连接件的第一端位于卷绕中心，所述第二电连接件的第二端相对于第一端远离卷绕中心；在所述卷芯的轴向的投影面内，所述第二电连接件自第一端连续弯曲延伸至第二端，且在延伸方向上包括第二拐点，所述第二电连接件位于所述第一端与所述第二拐点之间的弯曲段为所述第二导体段；所述第二电连接件的第一端与所述线为第二参考线，所述第二参考线与所述第二导体段围合形成第二包围区域，且目标区域部分或者全部位于所述第二包围区域内。
  6. 根据权利要求5所述的电池，其特征在于，所述第二电连接件包括至少两段连续弯曲的导体段，且至少包括一个所述第二拐点。
  7. 根据权利要求3所述的电池，其特征在于，所述第二电连接件的弯曲曲率与所述卷芯的卷绕曲率大致相同，且所述第二电连接件与所述卷芯结构大致同轴设置。
  8. 根据权利要求3至7中任一项所述的电池，其特征在于，所述第一电连接件的第二端和所述第二电连接件的第二端中，一者的第二端配置在所述电芯的顶部、底部或侧部，另一者配置在所述电芯的顶部、底部或侧部。
  9. 根据权利要求3至8中任一项所述的电池，其特征在于，所述第一电连接件配置在所述外壳的第一轴端侧，所述第二电连接件配置在所述外壳的第一轴端侧、第二轴端侧或者周壁；定义所述第一轴端侧和所述第二轴端侧分别为所述电芯的外壳两个轴向相对的端侧。
  10. 根据权利要求3至9中任一项所述的电池，其特征在于，所述卷芯包括第一极极耳和第二极极耳；
    所述第一极极耳和所述第二极极耳配置为：所述电池处于供电状态时，两者中至少一者可在所述目标区域产生第三磁场，所述第三磁场的方向与所述卷芯产生的磁场的方向相反。
  11. 根据权利要求3至10中任一项所述的电池，其特征在于，所述第一电连接件和所述第二电连接件中，至少所述第一电连接件采用导电金属片材制成；所述第一电连接件与所述外壳绝缘设置，且至少在所述外壳的盖板与所述第一电连接件之间设置有极间绝缘垫片。
  12. 根据权利要求3至10中任一项所述的电池，其特征在于，所述第一电连接件和所述第二电连接件中，至少所述第一电连接件采用FPC制成。
  13. 根据权利要求12所述的电池，其特征在于，所述FPC的基材片为圆环状，且套装在所述极 柱的外周。
  14. 根据权利要求3至10中任一项所述的电池，其特征在于，所述第一电连接件和所述第二电连接件中，至少所述第一电连接件采用具有包覆层的线缆制成。
  15. 根据权利要求14所述的电池，其特征在于，所述外壳上设置有限位片，且所述限位片的表面包括限位槽，采用线缆制成的所述第一电连接件内置于所述限位槽中。
  16. 根据权利要求1至15中任一项所述的电池，其特征在于，所述第一极片为正极片，所述第二极片为负极片。
  17. 一种电子设备，包括电池及与所述电池电连接的负载器件，其特征在于，所述电池采用权利要求1至16中任一项所述的电池，在所述卷芯的轴向的投影面内，所述负载器件的几何中心位于所述目标区域内。
  18. 根据权利要求17所述的电子设备，其特征在于，所述负载器件为喇叭。
PCT/CN2023/111394 2022-08-29 2023-08-07 一种电池及电子设备 WO2024046035A1 (zh)

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