WO2022183492A1 - 纽扣电池以及用电装置 - Google Patents

纽扣电池以及用电装置 Download PDF

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Publication number
WO2022183492A1
WO2022183492A1 PCT/CN2021/079341 CN2021079341W WO2022183492A1 WO 2022183492 A1 WO2022183492 A1 WO 2022183492A1 CN 2021079341 W CN2021079341 W CN 2021079341W WO 2022183492 A1 WO2022183492 A1 WO 2022183492A1
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WO
WIPO (PCT)
Prior art keywords
conductive
pole piece
extension
extending
button battery
Prior art date
Application number
PCT/CN2021/079341
Other languages
English (en)
French (fr)
Inventor
夏琳
Original Assignee
宁德新能源科技有限公司
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 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Priority to CN202180002493.0A priority Critical patent/CN113875074A/zh
Priority to PCT/CN2021/079341 priority patent/WO2022183492A1/zh
Priority to EP21928575.6A priority patent/EP4300698A4/en
Publication of WO2022183492A1 publication Critical patent/WO2022183492A1/zh
Priority to US18/459,838 priority patent/US20240072388A1/en

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    • 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
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of the 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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 present application relates to the technical field of batteries, and in particular, to a button battery and an electrical device.
  • a button battery also known as a button battery, is shaped like a button.
  • Button batteries are widely used in electronic equipment due to their advantages of small occupancy, portability, and stable discharge voltage.
  • some button batteries include a case, a pole mounted in the case, and an electrode assembly accommodated in the case.
  • the shell and the pole are both conductors and insulated from each other, so as to respectively form the positive and negative terminals of the button battery.
  • the electrode assembly it can be wound into a columnar structure or an approximate columnar structure, or can be stacked into a columnar structure or an approximate columnar structure, but no matter which form, the electrode assembly
  • the pole piece and the isolation film therebetween; wherein, the first pole piece and the second pole piece are not directly connected to the casing.
  • One tab is connected to the first pole piece and the casing, and the other tab is connected to the second pole piece and the pole post.
  • the inventors of the present application found that when the button battery is dropped, the electrode assembly will be displaced relative to the casing, so that the tabs are easily broken due to stress.
  • the purpose of the present application is to provide a button battery and an electrical device, so as to reduce the hidden danger of tab breakage when the button battery is dropped.
  • a button battery includes a case assembly, an electrode assembly, a first tab and a second tab.
  • the housing component is provided with a receiving cavity
  • the housing component includes a first conductive part and a second conductive part
  • the first conductive part and the second conductive part are insulated.
  • the electrode assembly is accommodated in the accommodating cavity
  • the electrode assembly includes a first pole piece, a second pole piece and an isolation film
  • the first pole piece and the second pole piece have opposite polarities and are along the first pole piece.
  • the preset directions are alternately stacked and arranged, and the isolation film is provided between the first pole piece and the second pole piece.
  • the first tab is accommodated in the accommodating cavity, the first tab includes a first connecting portion and a first extending portion, the first connecting portion is respectively connected with each of the first pole pieces, and the first An extension portion extends along the first predetermined direction and is curved, the first end of the first extension portion is connected to the first connection portion, and the first conductive portion and the second conductive portion are in the middle One is connected with the second end of the first extension.
  • the second tab is accommodated in the accommodating cavity, the second tab is respectively connected with each second pole piece, and the other one of the first conductive portion and the second conductive portion is connected to the second electrode. Pole connection.
  • the outer contour of the first pole piece includes first straight segments extending straight, and the first straight segments of each of the first pole pieces are substantially aligned.
  • the first connecting portions are respectively connected to the first straight sections of the first pole pieces.
  • the first extension part has two first side surfaces oppositely arranged along the second preset direction, each of the first side surfaces has a first concave area that is recessed toward the other first side surface, and faces away from the other first side surface.
  • a first protruding area protruding from the first side surface; wherein, the second predetermined direction is parallel to the extending direction of the first straight section.
  • the first pole piece includes a first straight section extending straight, and the first straight section of each of the first pole pieces is substantially aligned.
  • the first connecting portions are respectively connected to the first straight sections of the first pole pieces.
  • the first extension portion has two second side surfaces oppositely arranged along the third preset direction, each second side surface has a second concave area facing the other second side surface, and a second recessed area facing away from the other second side surface.
  • the second protruding area provided on the two side surfaces protrudes.
  • the third predetermined direction is perpendicular to both the first predetermined direction and the extending direction of the first straight section.
  • the first tab includes a plurality of first conductive sheets.
  • the first conductive pieces are in one-to-one correspondence with the first pole pieces, and the first conductive pieces are formed to extend outward from the first straight section.
  • the first conductive sheet includes a first connection sheet and a first extension sheet, the first connection sheet is connected with the first straight section, and the first extension sheet is connected with the first connection sheet.
  • an outermost first connecting piece extends away from the center of the connected first pole piece, and the remaining first connecting pieces extend from the corresponding first straight section to approach or fit with the one most For the first connecting pieces on the outside, each of the first connecting pieces together constitutes the first connecting portion, and each of the first extending pieces is stacked to form the first extending portion.
  • the first pole piece includes a first current collector and a first active material layer disposed on the surface of the first current collector.
  • the first conductive sheet is formed to extend outward from the edge of the first current collector, and the first conductive sheet and the first current collector are integrally formed.
  • the second pole tab includes a second connecting portion and a second extending portion, the second connecting portion is respectively connected with each of the second pole pieces, and the second extending portion is along the The first predetermined direction extends and is curved, and the first end of the second extension part is connected with the second connection part.
  • One of the first conductive portion and the second conductive portion is connected to the first extension portion, and the other of the first conductive portion and the second conductive portion is connected to the second extension portion. The second end is connected.
  • the outer contour of the second pole piece includes second straight sections extending straight, and the second straight sections of each of the second pole pieces are substantially aligned.
  • the second connecting parts are respectively connected to the second straight sections of the second pole pieces.
  • the second extension portion has two third side surfaces arranged opposite to each other along the fourth predetermined direction, each third side surface has a third recessed surface area recessed toward the other third side surface, and facing away from the other third side surface.
  • a third protruding area protruding from the three sides; wherein, the fourth preset direction is parallel to the extending direction of the second straight section.
  • the first extension portion and/or the second extension portion is in a continuous curved shape.
  • the outer contour of the second pole piece includes second straight sections extending straight, and the second straight sections of each of the second pole pieces are substantially aligned.
  • the second connecting parts are respectively connected to the second straight sections of the second pole pieces.
  • the second extension portion has two third side surfaces arranged opposite to each other along the fifth preset direction, each third side surface has a third concave area that is recessed toward the other third side surface, and faces away from the other third side surface.
  • a third protruding area protruding from the three sides; wherein, the fifth preset direction is parallel to the first preset direction and the extending direction of the second straight section at the same time.
  • the extending direction of the second straight section is parallel to the extension direction of the first straight section.
  • the second tab includes a plurality of second conductive sheets.
  • the second conductive pieces are in one-to-one correspondence with the second pole pieces, and the second conductive pieces extend outward from the second straight section.
  • the second conductive sheet includes a second connection sheet and a second extension sheet, the second connection sheet is connected with the second straight section, and the second extension sheet is connected with the second connection sheet.
  • an outermost second connecting piece extends away from the center of the connected second pole piece, and the remaining second connecting pieces extend from the corresponding second straight section to approach or fit with the one most For the second connecting pieces on the outside, each of the second connecting pieces together forms the second connecting portion, and each of the second extending pieces is stacked to form the second extending portion.
  • the second pole piece includes a second current collector and a second active material layer disposed on the surface of the second current collector.
  • the second conductive sheet is formed to extend outward from the edge of the first current collector, and the second conductive sheet is integrally formed with the second current collector.
  • the first conductive portion includes a first wall portion, a second wall portion and a connecting wall, and the first wall portion and the second wall portion are along the first preset direction Oppositely disposed, the connecting wall connects the first wall portion and the second wall portion, and the first wall portion, the second wall portion and the connecting wall together enclose the receiving cavity.
  • the connecting wall is provided with a through installation hole, and the second conductive part is installed in the installation hole through an insulating member.
  • An electrical device includes the above-mentioned button battery.
  • the button battery provided by the embodiment of the present application includes a case assembly, an electrode assembly, a first tab and a second tab.
  • the shell component includes a first conductive part and a second conductive part, and the first conductive part and the second conductive part are insulated.
  • the electrode assembly includes a first pole piece and a second pole piece with opposite polarities.
  • the first tabs include first connecting parts respectively connected to the first pole pieces, and a first extending part in a continuous curved shape; one of the first conductive part and the second conductive part is connected to the first pole piece.
  • the button battery provided by the embodiment of the present application when the button battery provided by the embodiment of the present application is dropped, the electrode assembly inside the shell assembly is displaced relative to the shell assembly; During this process, it is easy to be deformed by force (such as stretching or shrinking) under the action of the impact force, and part of the energy of the impact force can be absorbed through the deformation process. Therefore, the button battery provided by the embodiment of the present application can effectively reduce the hidden danger of the tab breaking when the button battery is dropped.
  • FIG. 1 is a perspective exploded schematic view of a button battery according to one embodiment of the present application in one direction;
  • FIG. 2 is a schematic diagram of the connection between the first tab in FIG. 1 and the electrode assembly when the first extension is bent parallel to the first pole piece;
  • FIG. 3 is a schematic diagram illustrating the connection with the first pole piece when the first conductive piece in FIG. 1 is unfolded to be parallel to the first pole piece.
  • 100 shell assembly; 110, first conductive part; 120, second conductive part; 111, first wall part; 112, second wall part; 113, connecting wall; 101, receiving cavity; 102, mounting hole;
  • electrode assembly 210, first pole piece; 220, second pole piece; 230, isolation membrane; 211, first current collector; 221, second current collector; 201, first straight section; 202, second straight section;
  • the first tab 310, the first connection part; 320, the first extension part; 330, the first conductive sheet; 321, the first side surface; 322, the second side surface; 3211, the first concave area; 331, the first connecting piece; 332, the first extension piece; 3321, the concave part; 3322, the convex part;
  • the "installation” includes welding, screwing, snapping, gluing, etc. to fix or restrict a certain element or device to a specific position or place, and the element or device can be held in a specific position or place. It can also move within a limited range without moving, and the element or device can be disassembled or not disassembled after being fixed or restricted in a specific position or place, which is not limited in the embodiments of the present application.
  • FIG. 1 to FIG. 2 there are respectively shown a three-dimensional exploded schematic view of a button battery 1 provided by one of the embodiments of the present application, and the first tab and the electrode assembly when the first extension portion is bent parallel to the first pole piece
  • the connection diagram of the button battery 1 includes a case assembly 100 , an electrode assembly 200 , a first tab 300 and a second tab 400 .
  • the housing assembly 100 is provided with a receiving cavity 101 , and the housing assembly 100 includes a first conductive portion 110 and a second conductive portion 120 which are insulated from each other.
  • the electrode assembly 200 is accommodated in the accommodating cavity 101, and includes a first pole piece 210, a second pole piece 220 and an isolation film 230; the first pole piece 210 and the second pole piece 220 have opposite polarities and are along a first predetermined direction
  • the Xs are alternately arranged, and the above-mentioned isolation film 230 is provided between the first pole piece 210 and the second pole piece 220 .
  • the first tab 300 is accommodated in the receiving cavity 101 , and includes a first connecting portion 310 and a first extending portion 320 .
  • the first connecting portions 310 are respectively connected with the first pole pieces 210 ; the first extending portions 320 extend along the first predetermined direction X and are curved, preferably continuously curved, and the first end of the first extending portion 320 is connected to the first connecting portion 310
  • one of the first conductive part 110 and the second conductive part 120 is connected to the second end of the first extension part 320 .
  • the second tabs 400 are accommodated in the accommodating cavity 101 , which are respectively connected to the second pole pieces 220 , and the other one of the first conductive portion 110 and the second conductive portion 120 is connected to the second tab 400 .
  • the case assembly 100 is an installation structure of the electrode assembly 200 , the first tab 300 and the second tab 400 , and is provided with a receiving cavity 101 for receiving the three.
  • the shell assembly 100 includes a first conductive portion 110 and a second conductive portion 120 that are insulated from each other, one of the first conductive portion 110 and the second conductive portion 120 is connected to the first tab 300 , and the other is connected to the second tab 400 . connected, so that the first conductive part 110 and the second conductive part 120 respectively form the positive and negative terminals of the button battery 1 .
  • the first conductive portion 110 has a shell shape as a whole, and includes a first wall portion 111 , a second wall portion 112 and a connecting wall 113 .
  • the first wall portion 111 and the second wall portion 112 are respectively flat plate-like or sheet-like structures, and the two are oppositely disposed along the first predetermined direction X.
  • the connecting wall 113 has a cylindrical structure extending along the first predetermined direction X as a whole, and one end of the connecting wall 113 is connected to the first wall portion 111 and the other end is connected to the second wall portion 112 , so that the first wall portion 111 and the second wall portion 112 are connected to the second wall portion 112 .
  • the connecting walls 113 together form the above-mentioned receiving cavity 101 .
  • the second conductive portion 120 is a pole.
  • the connecting wall 113 is provided with a through mounting hole 102 , and the second conductive portion 120 is mounted on the mounting hole 102 through an insulating member.
  • plastic is filled between the second conductive portion 120 and the hole wall of the mounting hole 102 to insulate the first conductive portion 110 and the second conductive portion 120 ;
  • the above-mentioned plastic can also be replaced with other insulating parts such as rubber.
  • the outer surface of the connecting wall 113 includes a plane, and the installation hole 102 is disposed on the plane.
  • the present application does not limit the specific location where the second conductive portion 120 is disposed; in other embodiments of the present application, the second conductive portion 120 may also be disposed on the above-mentioned first wall portion 111 or the second conductive portion 120 . wall portion 112; in addition, in other embodiments of the present application, the first conductive portion 110 and the second conductive portion 120 may also correspond to the first wall portion 111 and the second wall portion 112 described above, respectively.
  • the wall portion 111 is insulated from the second wall portion 112 .
  • the electrode assembly 200 is accommodated in the above-mentioned accommodating cavity 101 , which is the core component of the button battery 1 .
  • the electrode assembly 200 includes a first pole piece 210 and a second pole piece 220 that are alternately stacked and disposed along the first predetermined direction X, and an isolation film 230 disposed therebetween.
  • the first pole piece 210 includes a first current collector 211 and a first active material layer disposed on the surface of the first current collector 211 .
  • the polarity of the second pole piece 220 is opposite to that of the first pole piece 210 .
  • the second pole piece 220 includes a second current collector 221 and a second active material layer disposed on the surface of the second current collector 221 . Since the specific material and structure of the current collector in the pole piece, and the specific composition of the active material layer in the pole piece are all conventional techniques in the art, this application will not describe them in detail.
  • the area of the isolation film 230 is slightly larger than that of the first pole piece 210 and the second pole piece 220 , and is arranged between the first pole piece 210 and the second pole piece 220 to avoid the contact between the first pole piece 210 and the second pole piece 220 . The electrical contact between the battery 1 and the internal short circuit of the button battery 1 is avoided.
  • the first tab 300 is accommodated in the receiving cavity 101 , and includes a first connecting portion 310 and a first extending portion 320 .
  • the first connection portion 310 extends along the first predetermined direction X as a whole as shown, and is connected to each of the first pole pieces 210 respectively.
  • the pole pieces in the button battery on the market are all round, but the arc-shaped edge is actually not conducive to the connection with the above-mentioned first connecting part 310; in order to overcome this deficiency, the first pole piece 210 in the present application
  • the outer contour includes a first straight section 201 extending straight.
  • the first straight sections 201 are substantially aligned, and the first connecting portions 310 extend along the first predetermined direction X and connect the first straight sections 201 of the first pole pieces 210 respectively. Further, in order to ensure the consistency of the shapes of the first pole piece 210, the second pole piece 220 and the isolation film 230, the first pole piece 210, the second pole piece 220 and the isolation film 230 are all provided with the above-mentioned first straight section. 201, and the first straight sections 201 are basically aligned.
  • the first extension portion 320 extends along the above-mentioned first predetermined direction X (for the convenience of showing the shape of the first extension portion 320, it is bent parallel to the first pole piece 210 in the drawings), and is continuously curved;
  • the first end of an extension portion 320 is connected to the first connection portion 310, and the second end is connected to one of the first conductive portion 110 or the second conductive portion 120, such as the second conductive portion 120, so that the second conductive portion 120 is connected to the second conductive portion 120.
  • the portion 120 forms an external terminal of the first pole piece 210 .
  • the electrode assembly 200 is displaced relative to the case assembly 100; the first extension part 320 is arranged in a curved shape, so that the curved part is deformed under the pulling or squeezing action of both ends, the The deformation process can absorb the energy of the impact force during the falling process, thereby reducing the stress on the two ends of the first tab 300 , thereby reducing the potential rupture of the first tab 300 during the falling process of the button battery 1 .
  • the first straight sections 201 of the first pole pieces 210 cannot be aligned in an absolute sense, because as long as the accuracy of the measuring tool is high enough, the first straight section 201 of the two first pole pieces 201 cannot be aligned.
  • the degree of inter-alignment relative to the ideal alignment effect must have a certain deviation, so the "basic alignment setting" described in this application is intended to indicate that the deviation value of the alignment between the first straight sections 201 is relatively low, such as the first straight sections 201.
  • the deviation distance of the projection of the same portion of the straight section 201 falling on the first wall portion 111 does not exceed 0.5 millimeters (mm).
  • the first extension portion 320 has two first side surfaces 321 oppositely disposed along the second predetermined direction Y.
  • each of the first side surfaces 321 has a first recessed area 3211 recessed toward the other first side surface 321 .
  • a first protruding area 3212 protruding away from the other first side surface 321 ; the first concave area 3211 and the first protruding area 3212 are alternately arranged, so that the first extension 320 is along the first preset direction
  • the X extends and is continuously curved.
  • the “second preset direction” is a direction parallel to the extending direction of the first straight section 201 .
  • the first tab 300 includes a plurality of first conductive sheets, and is formed by stacking the plurality of first conductive sheets.
  • FIG. 3 shows a three-dimensional schematic diagram of the connection between the first conductive sheet 330 and the first pole piece 210 , in conjunction with other drawings;
  • a straight section 201 is initially formed to extend outward, and includes a first connecting piece 331 and a first extending piece 332 .
  • the first connecting piece 331 is connected with the first straight section 201
  • the first extending piece 332 is connected with the first connecting piece 331 .
  • first connecting piece 331 extends away from the center of the connected first pole piece 210 , and the remaining first connecting pieces 331 are The corresponding first straight sections 201 initially extend to be close to or abut against the outermost first connecting pieces 331 , and the first connecting pieces 331 are welded and fixed to form the first connecting portion 310 .
  • the first extension piece 332 is bent relative to the first connecting piece 331 and extends along the first predetermined direction X.
  • the two opposite elongated surfaces of the first extension piece 332 along the second preset direction Y are respectively continuously curved, and any elongated surface has a concave portion 3321 that is concave toward the other elongated surface, and faces away from the The protrusions 3322 protruding from the other elongated surface; the corresponding depressions 3321 on the same side of each first conductive sheet 330 form the first depression area 3211 , and the corresponding protrusions 3322 on the same side form the above The first protruding area 3212.
  • the first extending pieces 332 are stacked to form the first extending portion 320 , and the elongated surfaces on the same side constitute the first side surface.
  • the first conductive sheet 330 and the first current collector 211 are integrally formed, that is, the first conductive sheet 330 and the first current collector 211 are formed by subtractive material from the same metal foil. Because the thickness of the first pole piece 210 is extremely small, the process of welding the first pole tab 300 and each of the first pole pieces 210 is extremely difficult and cumbersome; and the first conductive piece 330 and the first current collector 211 are integrally formed, The arrangement of stacking the first conductive sheets 330 to form the first tab 300 can effectively overcome the above disadvantages.
  • the thickness of the entire electrode assembly 200 is equal to the sum of the thicknesses of the first pole piece 210 , the isolation film 230 , the second pole piece 220 and the isolation film 230 , and the thickness of the first pole piece 210 is equal to the first current collector. 211 and the thickness of the first active material layer coated on the surface of the first current collector 211, so the thickness of the first tab 300 formed after each first conductive sheet 330 is stacked is compared with the thickness of the entire electrode assembly 200. extremely small.
  • the continuous curved structure of the first extension portion 320 in this embodiment is specifically formed by the first concave area 3211 concave along the second preset direction Y, and the convex set along the second preset direction Y
  • the first protruding area 3212 is jointly determined, but the present application is not limited thereto.
  • the first extension part 320 has two second side surfaces (not shown in the figure) oppositely arranged along the third preset direction Z shown in FIG.
  • the first extension portion 320 can be made to extend along the first preset direction X and be continuously curved, so as to reduce the hidden danger of breaking the first tab during the drop of the button battery 1 .
  • the “third preset direction” is a direction perpendicular to the first preset direction X and the extending direction of the first straight section 201 at the same time.
  • the first extension portion 320 may also extend along the above-mentioned third preset direction Z and be in a continuous curved shape, which can also achieve the effect of reducing the hidden danger of breaking the first tab 300 .
  • this embodiment will make the size of the button battery 1 along the third preset direction Z become larger, which is not conducive to the miniaturization of the button battery 1 .
  • the shape of the second tab 400 is basically the same as that of the first tab 300 , it is accommodated in the receiving cavity 101 , and includes a second connecting portion and a second tab 300 . extension.
  • the second connecting portions extend along the first predetermined direction X as a whole, and are respectively connected with the second pole pieces 220 .
  • the pole pieces in the button battery on the market are all round, but the arc-shaped edge is actually not conducive to the connection with the above-mentioned second connecting part; to overcome this deficiency, the outer surface of the second pole piece 220
  • the profile includes a second straight section 202 that extends straight.
  • the second straight section 202 is parallel to the first straight section 201, and the second straight sections 202 are substantially aligned; the second connecting portion extends along the first preset direction X and The second straight sections 202 of the second pole pieces 220 are respectively connected. Further, in order to ensure the consistency of the shapes of the second pole piece 220, the second pole piece 220 and the isolation film 230, the second pole piece 220, the second pole piece 220 and the isolation film 230 are all provided with the above-mentioned second straight section. 202, and the second straight sections 202 are substantially aligned.
  • the second extension portion extends along the first predetermined direction X, and is curved, preferably continuously curved; the first end of the second extension portion is connected to the second connection portion, and the second end is connected to the first conductive portion 110 or the second conductive portion 120 is not connected to one of the first tabs 300 , such as the first conductive portion 110 is connected, so that the first conductive portion 110 forms an external terminal of the second pole piece 220 .
  • the electrode assembly 200 is displaced relative to the shell assembly 100; the second extension part is arranged in a continuous curved shape, so that the curved part is deformed under the pulling or squeezing action of both ends, the The deformation process can absorb the energy of the impact force during the falling process, thereby reducing the stress on the two ends of the second tab 400 , thereby reducing the potential rupture of the second tab 400 during the falling process of the button battery 1 .
  • the second extension portion has two third side surfaces disposed opposite to each other along the fourth predetermined direction.
  • each third side surface has a third recessed area facing the other third side surface, and a third recessed area facing away from the other third side surface.
  • a third protruding area protruding from the third side surface; the third concave area and the third protruding area are alternately arranged, so that the second extension portion extends along the first preset direction and is continuously curved.
  • the “fourth preset direction” is a direction parallel to the extending direction of the second straight section 202; in this embodiment, the fourth preset direction and the second preset direction are the same direction, but in this embodiment In other embodiments of the application, the fourth preset direction may be changed according to the specific arrangement of the second straight section 202 .
  • the second tab 400 includes a plurality of second conductive sheets, and is formed by stacking the plurality of second conductive sheets. Similar to the first conductive sheet 330 described above, the second conductive sheet is in one-to-one correspondence with the second pole piece 220 , which extends outward from the second straight section 202 and includes a second connecting sheet and a second extension piece. Wherein, the second connecting piece is connected with the second straight section, and the second extending piece is connected with the second connecting piece.
  • an outermost (lowermost side in FIG. 2 ) second connecting piece extends away from the center of the connected second pole piece 220 , and the remaining second connecting pieces respectively extend from the corresponding second connecting piece.
  • the two straight sections 202 initially extend to be close to or abut against the outermost second connecting piece, and the second connecting pieces are welded and fixed to form the above-mentioned second connecting portion together.
  • the second extending piece is bent relative to the second connecting piece, and extends along the first predetermined direction X.
  • the two opposite elongated surfaces of the second extending piece along the above-mentioned fourth preset direction are respectively continuously curved, and any elongated surface has a concave portion concave toward the other elongated surface, and a concave portion facing away from the other elongated surface.
  • the elongated surface protrudes from the protruding parts; the corresponding concave parts on the same side of each second conductive sheet form the third concave area, and the corresponding protruding parts on the same side form the third convex area.
  • the second extending pieces are stacked to form a second extending portion, and the elongated surfaces on the same side constitute the third side surface.
  • the second conductive sheet and the second current collector 221 are integrally formed, that is, the second conductive sheet and the second current collector 221 are formed by subtractive material from the same metal foil. Since the thickness of the second pole piece 220 is extremely small, it is extremely difficult and cumbersome to weld the second pole tab 400 and each second pole piece 220 respectively. The arrangement of stacking each of the second conductive sheets to form the second tab 400 can effectively overcome the above drawbacks. It is worth mentioning that the thickness of the entire electrode assembly 200 is equal to the sum of the thicknesses of the second pole pieces 220 , the isolation membrane 230 , the second pole pieces 220 and the isolation membrane 230 , and the thickness of the second pole piece 220 is equal to the second current collector.
  • the thickness of the second conductive sheet is equal to the thickness of the second current collector, so the second electrode formed by laminating
  • the thickness of the ear 400 is extremely small compared to the thickness of the entire electrode assembly 200 .
  • the continuous curved structure of the second extension portion in this embodiment is specifically composed of a third concave area concave along the above-mentioned fourth preset direction, and a third convex area disposed protruding along the above-mentioned fourth preset direction.
  • the surface area is determined jointly, but the present application is not limited to this.
  • the second extending portion has two fourth side surfaces oppositely arranged along the fifth preset direction; each second side surface has a fourth recessed surface recessed toward the other fourth side surface area, and a fourth protruding area protruding away from the other fourth side surface; the fourth concave area and the fourth protruding area are alternately arranged, and the second extension portion can also extend along the first preset direction X And it is in a continuous curved shape, so as to reduce the hidden danger of breaking the second tab of the button battery 1 during the falling process.
  • the “fifth preset direction” is a direction perpendicular to the first preset direction X and the extending direction of the second straight section 202 at the same time; in this embodiment, the fifth preset direction is the same as the third preset direction.
  • the preset direction Z is the same direction, but in other embodiments of the present application, the fifth preset direction may be changed according to the specific arrangement of the second straight section 202 .
  • the first extension portion may also extend along the above-mentioned third preset direction Z, and be in a continuous curved shape, which can also achieve the effect of reducing the hidden danger of rupture of the second tab 400;
  • this embodiment will make the size of the button battery 1 along the third preset direction Z become larger, which is not conducive to the miniaturization of the button battery 1 .
  • the button battery 1 provided in the embodiment of the present application includes a case assembly 100 , an electrode assembly 200 , a first tab 300 and a second tab 400 .
  • the case assembly 100 includes a first conductive portion 110 and a second conductive portion 120 , and the first conductive portion 110 and the second conductive portion 120 are insulated from each other.
  • the electrode assembly 200 includes a first pole piece 210 and a second pole piece 220 with opposite polarities.
  • the first tab 300 includes a first connecting portion 310 respectively connected to each of the first pole pieces 210 , and a first extending portion 320 extending along the first predetermined direction X and in a continuously curved shape; the first conductive portion 110 and the One of the two conductive parts 120 is connected to the first pole piece 210 .
  • the button battery 1 provided in the embodiment of the present application is dropped, the electrode assembly 200 inside the shell assembly 100 is displaced relative to the shell assembly; A continuous curved shape, which is easily deformed by force (such as stretching or shrinking) under the action of the impact force in the process, and can absorb part of the energy of the impact force through the deformation process. Therefore, the button battery 1 provided by the embodiment of the present application can effectively reduce the hidden danger of the tab breaking when the button battery is dropped.
  • the present application also provides an electrical device, which includes a load and the button battery 1 in the above embodiment, and the button battery 1 is used to supply power to the load. Since the button battery 1 in the above-mentioned embodiment is included, the electric device can also effectively reduce the hidden danger of the tabs breaking when the button battery inside is dropped.

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Abstract

一种纽扣电池（1）以及用电装置，涉及电池技术领域。纽扣电池（1）包括壳组件（100）、电极组件（200）、第一极耳（300）与第二极耳（400）。其中，壳组件（100）包括第一导电部（110）与第二导电部（120），该第一导电部（110）与第二导电部（120）之间绝缘。电极组件（200）包括极性相反的第一极片（210）与第二极片（220）。第一极耳（300）包括分别与各第一极片（210）连接的第一连接部（310），以及呈连续弯曲状的第一延伸部（320）；第一导电部（110）与第二导电部（120）中的一个与第一极片（210）连接。该纽扣电池（1）在跌落时，壳组件（100）内部的电极组件（200）相对壳组件（100）发生位移；由于第一极耳（300）的第一延伸部（310）呈连续弯曲状，其在该过程中在冲击力的作用下容易受力变形，并可通过该变形过程来吸收部分冲击力的能量。故该纽扣电池（1）能够有效降低纽扣电池（1）跌落时，极耳断裂的隐患。

Description

纽扣电池以及用电装置 技术领域
本申请涉及电池技术领域，尤其涉及一种纽扣电池以及用电装置。
背景技术
纽扣电池，又称扣式电池，其形似纽扣状。纽扣电池因具有占用体积小、轻便便携、放电电压平稳等优点，而在电子设备中具有较广的应用。
目前，有些纽扣电池包括壳体、安装于壳体的极柱以及收容于壳体内的电极组件。其中，壳体与极柱均为导体且彼此绝缘，以分别形成该纽扣电池的正负极端子。而对于电极组件，其可以是卷绕成柱状结构或近似柱状结构，亦可以是堆叠成柱状或近似柱状结构，但无论哪种形式，电极组件均包括循环交替设置的第一极片、第二极片以及两者之间的隔离膜；其中，上述第一极片与第二极片均不与壳体直接连接。一极耳连接第一极片与壳体，另一极耳连接第二极片与极柱。
本申请的发明人在实现本申请的过程中发现：在纽扣电池跌落时，电极组件会相对壳体发生位移，从而使极耳受力而容易发生断裂。
发明内容
本申请旨在提供一种纽扣电池以及用电装置，以降低纽扣电池跌落时，极耳断裂的隐患。
本申请解决其技术问题采用以下技术方案：
一种纽扣电池，包括壳组件、电极组件、第一极耳与第二极耳。其中，所述壳组件设有收容腔，所述壳组件包括第一导电部与第二导电部，所述第一导电部与所述第二导电部之间绝缘。所述电极组件收容于所述收容腔，所述电极组件包括第一极片、第二极片与隔离膜，所述第一极片与所述第二极片的极性相反且沿第一预设方向交替堆叠设置，所述第一极片和所述第二极片之间设有所述隔离膜。所述第一极耳收容于所述收容腔，所述第一极耳包括第一连接部与第一延伸部，所述第一连接部分别与各所述第一极片连接，所述第一延伸部沿所述第一预设方向延伸并呈弯曲状，所述第一延伸部的第一端与所述第一连 接部连接，所述第一导电部与所述第二导电部中的一个与所述第一延伸部的第二端连接。所述第二极耳收容于所述收容腔，所述第二极耳分别与各第二极片连接，所述第一导电部与所述第二导电部中的另一个与所述第二极耳连接。
作为上述技术方案的进一步改进方案，所述第一极片的外轮廓包括平直延伸的第一平直段，各所述第一极片的第一平直段基本对齐设置。所述第一连接部分别连接各所述第一极片的第一平直段。所述第一延伸部具有沿第二预设方向相对设置的两第一侧面，每一所述第一侧面具有朝向另一第一侧面凹陷设置的第一凹陷面域，以及背向所述另一第一侧面凸出设置的第一凸出面域；其中，所述第二预设方向与所述第一平直段延伸的方向平行。
作为上述技术方案的进一步改进方案，所述第一极片包括平直延伸的第一平直段，各所述第一极片的第一平直段基本对齐设置。所述第一连接部分别连接各所述第一极片的第一平直段。所述第一延伸部具有沿第三预设方向相对设置的两第二侧面，每一第二侧面具有朝向另一第二侧面凹陷设置的第二凹陷面域，以及背向所述另一第二侧面凸出设置的第二凸出面域。其中，所述第三预设方向同时与所述第一预设方向及所述第一平直段的延伸的方向垂直。
作为上述技术方案的进一步改进方案，所述第一极耳包括复数个第一导电片。所述第一导电片与所述第一极片一一对应，所述第一导电片自所述第一平直段向外延伸形成。所述第一导电片包括第一连接片与第一延伸片，所述第一连接片与所述第一平直段连接，所述第一延伸片与所述第一连接片连接。其中，一最外侧的第一连接片背离所连接的所述第一极片的中心延伸，其余的第一连接片自相应的第一平直段起始延伸至靠近或贴合所述一最外侧的第一连接片，各所述第一连接片共同组成所述第一连接部，各所述第一延伸片层叠设置以形成所述第一延伸部。
作为上述技术方案的进一步改进方案，所述第一极片包括第一集流体以及设于所述第一集流体表面的第一活性材料层。所述第一导电片自所述第一集流体的边缘向外延伸形成，所述第一导电片与所述第一集流体一体成型。
作为上述技术方案的进一步改进方案，所述第二极耳包括第二连接部与第二延伸部，所述第二连接部分别与各所述第二极片连接，所述第二延伸部沿所述第一预设方向延伸并呈弯曲状，所述第二延伸部的第一端与所述第二连接部连接。所述第一导电部与所述第二导电部中的一个与所述第一延伸部连接，所述第一导电部与所述第二导电部中的另一个与所述第二延伸部的第二端连接。
作为上述技术方案的进一步改进方案，所述第二极片的外轮廓包括平直延伸的第二平直段，各所述第二极片的第二平直段基本对齐设置。所述第二连接部分别连接各所述第二极片的第二平直段。所述第二延伸部具有沿第四预设方向相对设置的两第三侧面，每一第三侧面具有朝向另一第三侧面凹陷设置的第三凹陷面域，以及背向所述另一第三侧面凸出设置的第三凸出面域；其中，所述第四预设方向与所述第二平直段的延伸方向平行。
作为上述技术方案的进一步改进方案，所述第一延伸部和/或所述第二延伸部呈连续弯曲状。
作为上述技术方案的进一步改进方案，所述第二极片的外轮廓包括平直延伸的第二平直段，各所述第二极片的第二平直段基本对齐设置。所述第二连接部分别连接各所述第二极片的第二平直段。所述第二延伸部具有沿第五预设方向相对设置的两第三侧面，每一第三侧面具有朝向另一第三侧面凹陷设置的第三凹陷面域，以及背向所述另一第三侧面凸出设置的第三凸出面域；其中，所述第五预设方向同时与第一预设方向及所述第二平直段的延伸方向平行。
作为上述技术方案的进一步改进方案，所述第二平直段与所述第一平直段的延伸方向平行。
作为上述技术方案的进一步改进方案，所述第二极耳包括复数个第二导电片。所述第二导电片与所述第二极片一一对应，所述第二导电片自所述第二平直段向外延伸形成。所述第二导电片包括第二连接片与第二延伸片，所述第二连接片与所述第二平直段连接，所述第二延伸片与所述第二连接片连接。其中，一最外侧的第二连接片背离所连接的所述第二极片的中心延伸，其余的第二连 接片自相应的第二平直段起始延伸至靠近或贴合所述一最外侧的第二连接片，各所述第二连接片共同组成所述第二连接部，各所述第二延伸片层叠设置以形成所述第二延伸部。
作为上述技术方案的进一步改进方案，所述第二极片包括第二集流体以及设于所述第二集流体表面的第二活性材料层。所述第二导电片自所述第一集流体的边缘向外延伸形成，所述第二导电片与所述第二集流体一体成型。
作为上述技术方案的进一步改进方案，所述第一导电部包括第一壁部、第二壁部以及连接壁，所述第一壁部与所述第二壁部沿所述第一预设方向相对设置，所述连接壁连接所述第一壁部与所述第二壁部，所述第一壁部、第二壁部与连接壁共同围成所述收容腔。所述连接壁设有贯通的安装孔，所述第二导电部通过绝缘件安装于所述安装孔。
本申请解决其技术问题还采用以下技术方案：
一种用电装置，包括上述的纽扣电池。
本申请的有益效果是：
本申请实施例提供的纽扣电池包括壳组件、电极组件、第一极耳与第二极耳。其中，壳组件包括第一导电部与第二导电部，该第一导电部与第二导电部之间绝缘。电极组件包括极性相反的第一极片与第二极片。第一极耳包括分别与各第一极片连接的第一连接部，以及呈连续弯曲状的第一延伸部；第一导电部与第二导电部中的一个与第一极片连接。
与目前市场上的纽扣电池相比，本申请实施例提供的纽扣电池在跌落时，壳组件内部的电极组件相对壳组件发生位移；由于第一极耳的第一延伸部呈连续弯曲状，其在该过程中在冲击力的作用下容易受力变形(如拉伸或收缩)，并可通过该变形过程来吸收部分冲击力的能量。故本申请实施例提供的纽扣电池能够有效降低纽扣电池跌落时，极耳断裂的隐患。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所 需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1是本申请其中一实施例的纽扣电池的一个方向的立体分解示意图；
图2是图1中第一极耳于第一延伸部弯折成平行于第一极片时与电极组件的连接示意图；
图3为图1中第一导电片展开至和第一极片平行时与第一极片连接的示意图。
图中：
1、纽扣电池；
100、壳组件；110、第一导电部；120、第二导电部；111、第一壁部；112、第二壁部；113、连接壁；101、收容腔；102、安装孔；
200、电极组件；210、第一极片；220、第二极片；230、隔离膜；211、第一集流体；221、第二集流体；201、第一平直段；202、第二平直段；
300、第一极耳；310、第一连接部；320、第一延伸部；330、第一导电片；321、第一侧面；322、第二侧面；3211、第一凹陷面域；3212、第一凸出面域；331、第一连接片；332、第一延伸片；3321、凹陷部；3322、凸出部；
400、第二极耳。
具体实施方式
为了便于理解本申请，下面结合附图和具体实施例，对本申请进行更详细的说明。需要说明的是，当元件被表述“固定于”/“固接于”另一个元件，它可以直接在另一个元件上、或者其间可以存在一个或多个居中的元件。当一个元件被表述“连接”另一个元件，它可以是直接连接到另一个元件、或者其间可以存在一个或多个居中的元件。本说明书所使用的术语“垂直的”、“水平的”、“左”、“右”、“内”、“外”以及类似的表述只是为了说明的目的。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
此外，下面所描述的本申请不同实施例中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
在本说明书中，所述“安装”包括焊接、螺接、卡接、粘合等方式将某一元件或装置固定或限制于特定位置或地方，所述元件或装置可在特定位置或地方保持不动也可在限定范围内活动，所述元件或装置固定或限制于特定位置或地方后可进行拆卸也可不能进行拆卸，在本申请实施例中不作限制。
参照图1至图2，其分别示出了本申请其中一实施例提供的纽扣电池1的立体分解示意图，及第一延伸部弯折成平行于第一极片时第一极耳与电极组件的连接示意图，该纽扣电池1包括壳组件100、电极组件200、第一极耳300与第二极耳400。其中，壳组件100设有收容腔101，该壳组件100包括彼此绝缘的第一导电部110与第二导电部120。电极组件200收容于收容腔101，其包括第一极片210、第二极片220与隔离膜230；该第一极片210与第二极片220的极性相反且沿第一预设方向X交替设置，第一极片210与第二极片220之间设有上述隔离膜230。第一极耳300收容于收容腔101，其包括第一连接部310与第一延伸部320。第一连接部310分别与各第一极片210连接；第一延伸部320沿上述第一预设方向X延伸并呈弯曲状，优选为连续弯曲状，其第一端与第一连接部310连接，第一导电部110与第二导电部120中的一个与第一延伸部320的第二端连接。同理，第二极耳400收容于收容腔101，其分别与各第二极片220连接，上述第一导电部110与第二导电部120中的另一个与第二极耳400连接。
对于上述壳组件100，请参阅图1，壳组件100是电极组件200、第一极耳300与第二极耳400的安装结构，其设有用以收容上述三者的收容腔101。壳组件100包括相互绝缘的第一导电部110与第二导电部120，该第一导电部110与第二导电部120中的一个与第一极耳300连接，另一个与第二极耳400连接，从而使该第一导电部110与第二导电部120分别形成纽扣电池1的正、负极端子。
本实施例中，第一导电部110整体呈壳体状，其包括第一壁部111、第二壁部112以及连接壁113。第一壁部111与第二壁部112分别呈扁平的板状或片状结构，两者沿第一预设方向X相对设置。连接壁113整体呈沿第一预设方向X延伸的筒状结构，其一端连接第一壁部111，另一端连接第二壁部112，以使第 一壁部111、第二壁部112与连接壁113共同围成上述收容腔101。第二导电部120为极柱，相应地，上述连接壁113设有贯通的安装孔102，第二导电部120通过绝缘件安装于该安装孔102处。例如，在一些实施方式中，第二导电部120与安装孔102的孔壁之间填充有塑胶，以使第一导电部110与第二导电部120之间绝缘；当然，在本申请的其他实施例中，上述塑胶亦可以替换为橡胶等其他绝缘件。较优地，为方便第二导电部120的安装，连接壁113的外表面包括一平面，安装孔102设置于该平面上。值得一提的是，本申请并不对第二导电部120设置的具体位置作出限定；在本申请其他的实施例中，第二导电部120也可以设于上述的第一壁部111或第二壁部112；此外，在本申请其他的实施例中，第一导电部110与第二导电部120还可以分别对应是上述的第一壁部111与第二壁部112，此时该第一壁部111与第二壁部112绝缘。
对于上述电极组件200，请参阅图2，同时结合图1，电极组件200收容于上述收容腔101，其是该纽扣电池1的核心部件。电极组件200包括沿上述第一预设方向X交替堆叠设置的第一极片210与第二极片220，以及设于两者之间的隔离膜230。其中，第一极片210包括第一集流体211以及设于第一集流体211表面的第一活性材料层。第二极片220的极性与第一极片210相反，同理，第二极片220包括第二集流体221以及设于该第二集流体221表面的第二活性材料层。由于极片中集流体的具体材料、结构，以及与极片中活性材料层的具体成分，均是本领域的常规技术，本申请不对其作详细说明。隔离膜230的面积略大于第一极片210与第二极片220，其设于第一极片210与第二极片220之间，以避免第一极片210与第二极片220之间电接触，进而避免纽扣电池1内部短路。
对于上述第一极耳300，请具体参阅图2，同时结合图1，第一极耳300收容于收容腔101内，其包括第一连接部310与第一延伸部320。第一连接部310整体如图示沿第一预设方向X延伸，其分别与各第一极片210连接。考虑到目前市场上纽扣电池内的极片都呈圆形，但弧形的边缘实则并不利于与上述第一连接部310连接；为克服这一不足，本申请中的第一极片210的外轮廓包括平直延伸的第一平直段201。各第一平直段201之间基本对齐设置，上述第一连接部310沿第一预设方向X延伸并分别连接各第一极片210的第一平直段201。进一步地，为保证第一极片210、第二极片220与隔离膜230形状的一致性，该第 一极片210、第二极片220与隔离膜230均设有上述第一平直段201，且各第一平直段201之间基本对齐设置。
第一延伸部320沿上述第一预设方向X延伸(为方便展示第一延伸部320的形状，附图中其弯折成平行于第一极片210)，且呈连续弯曲状；该第一延伸部320的第一端与第一连接部310连接，第二端连接上述第一导电部110或第二导电部120中的一个，如连接上述第二导电部120，以使第二导电部120形成第一极片210的外部端子。如此，在纽扣电池1跌落的过程中，电极组件200相对壳组件100发生位移；第一延伸部320呈弯曲状的设置，使其弯曲的部位在两端的拉扯或挤压作用下发生形变，该形变的过程可吸收跌落过程中冲击力的能量，进而减小第一极耳300的两个端部的受力情况，从而降低第一极耳300在纽扣电池1跌落过程中的断裂隐患。值得一提的是，由于在实际工程作业中，各第一极片210的第一平直段201无法绝对意义上地对齐，因为只要测量工具的精度足够高，两第一平直段201之间对齐的程度相对理想的对齐效果必然具有一定偏差的，故本申请中所述的“基本对齐设置”旨在表明各第一平直段201之间对齐的偏差值较低，如各第一平直段201相同部位落在上述第一壁部111上的投影的偏差距离不超过0.5毫米(mm)。
第一延伸部320具有沿第二预设方向Y相对设置的两第一侧面321，本实施例中，每一第一侧面321均具有朝向另一第一侧面321凹陷设置第一凹陷面域3211，以及背向另一第一侧面321凸出设置的第一凸出面域3212；该第一凹陷面域3211与第一凸出面域3212交替设置，使得第一延伸部320沿第一预设方向X延伸并呈连续弯曲状。其中，所述“第二预设方向”为与上述第一平直段201延伸方向平行的方向。
在本实施例中，第一极耳300包括复数个第一导电片，并由该复数个第一导电片层叠设置形成。请参阅图3，其示出了第一导电片330与第一极片210连接的立体示意图，同时结合其他附图；该第一导电片330与第一极片210一一对应，其自第一平直段201处起始向外延伸形成，并包括第一连接片331与第一延伸片332。其中，第一连接片331与第一平直段201连接，第一延伸片332与第一连接片331连接。沿上述第一预设方向X，一最外侧(如图2中最低侧)的第一连接片331朝背离所连接的第一极片210的中心延伸，而其余的第一连接片331分别自相应的第一平直段201起始延伸至靠近或贴合该最外侧的第一 连接片331，各第一连接片331之间焊接固定以共同组成上述第一连接部310。第一延伸片332相对第一连接片331弯折设置，其沿上述第一预设方向X延伸。该第一延伸片332沿第二预设方向Y相对的两个细长表面分别呈连续弯曲状，任一细长表面均具有朝向另一细长表面凹陷的凹陷部3321，以及背向所述另一细长表面凸出设置的凸出部3322；各第一导电片330同一侧中对应的各个凹陷部3321形成上述第一凹陷面域3211，同一侧中对应的各个凸出部3322形成上述第一凸出面域3212。各第一延伸片332层叠设置以形成第一延伸部320，同一侧的所述细长表面构成上述第一侧面。
较优地，第一导电片330与上述第一集流体211一体成型，即是：第一导电片330与第一集流体211由同一金属箔材减材成型。由于第一极片210厚度极小，将第一极耳300与各第一极片210分别焊接的工艺难度是极高且繁琐的；而第一导电片330与第一集流体211一体成型，将各第一导电片330层叠组成第一极耳300的设置可有效克服上述弊端。值得一提的是，整个电极组件200的厚度等于各第一极片210、隔离膜230、第二极片220以及隔离膜230的厚度总和，同时第一极片210的厚度等于第一集流体211与涂覆于第一集流体211表面的第一活性材料层的厚度之和，故而各第一导电片330层叠后形成的第一极耳300的厚度与整个电极组件200的厚度相比是极小的。
应当理解：即是本实施例中第一延伸部320连续弯曲状结构具体是由沿第二预设方向Y凹陷的第一凹陷面域3211，以及沿上述第二预设方向Y凸出设置的第一凸出面域3212共同确定的，但本申请并不局限于此。例如，在本申请其他的一些实施例中，第一延伸部320具有沿图2所示的第三预设方向Z相对设置的两第二侧面(图中未示出)；每一第二侧面均具有朝向另一第二侧面凹陷设置第二凹陷面域，以及背向另一第二侧面凸出设置的第二凸出面域；该第二凹陷面域与第二凸出面域交替设置，亦可以使得第一延伸部320沿第一预设方向X延伸并呈连续弯曲状，以实现降低纽扣电池1跌落过程第一极耳断裂的隐患。其中，所述“第三预设方向”为同时与上述第一预设方向X及上述第一平直段201延伸方向垂直的方向。当然，在本申请其他的另一些实施例中，第一延伸部320还可以沿上述第三预设方向Z延伸，并呈连续弯曲状，其同样可实现降低第一极耳300断裂隐患的效果；但与前两种实施方式相比，这一实施方式将使得纽扣电池1沿第三预设方向Z的尺寸变得更大，不利于纽扣电池1的 小型化。
对于上述第二极耳400，请具体结合图1与图2，第二极耳400的形状与第一极耳300基本相同，其收容于收容腔101内，并包括第二连接部与第二延伸部。第二连接部整体沿第一预设方向X延伸，其分别与各第二极片220连接。考虑到目前市场上纽扣电池内的极片都呈圆形，但弧形的边缘实则并不利于与上述第二连接部连接；为克服这一不足，本申请中的第二极片220的外轮廓包括平直延伸的第二平直段202。可选地，该第二平直段202与上述第一平直段201之间平行，各第二平直段202之间基本对齐设置；上述第二连接部沿第一预设方向X延伸并分别连接各第二极片220的第二平直段202。进一步地，为保证第二极片220、第二极片220与隔离膜230形状的一致性，该第二极片220、第二极片220与隔离膜230均设有上述第二平直段202，且各第二平直段202之间基本对齐设置。
第二延伸部沿上述第一预设方向X延伸，且呈弯曲状，优选为连续弯曲状；该第二延伸部的第一端与第二连接部连接，第二端连接上述第一导电部110或第二导电部120中未连接第一极耳300的一个，如连接上述第一导电部110，以使第一导电部110形成第二极片220的外部端子。如此，在纽扣电池1跌落的过程中，电极组件200相对壳组件100发生位移；第二延伸部呈连续弯曲状的设置，使其弯曲的部位在两端的拉扯或挤压作用下发生形变，该形变的过程可吸收跌落过程中冲击力的能量，进而减小第二极耳400的两个端部的受力情况，从而降低第二极耳400在纽扣电池1跌落过程中的断裂隐患。
第二延伸部具有沿第四预设方向相对设置的两第三侧面，本实施例中，每一第三侧面均具有朝向另一第三侧面凹陷设置第三凹陷面域，以及背向另一第三侧面凸出设置的第三凸出面域；该第三凹陷面域与第三凸出面域交替设置，使得第二延伸部沿第一预设方向延伸并呈连续弯曲状。其中，所述“第四预设方向”为与上述第二平直段202延伸方向平行的方向；本实施例中，第四预设方向与上述第二预设方向为同一方向，但在本申请的其他实施例中，第四预设方向可以根据第二平直段202的具体设置方式而发生变化。
在本实施例中，第二极耳400包括复数个第二导电片，并由该复数个第二导电片层叠设置形成。与上述第一导电片330相似，该第二导电片与第二极片220一一对应，其自上述第二平直段202处起始向外延伸形成，并包括第二连接 片与第二延伸片。其中，第二连接片与第二平直段连接，第二延伸片与第二连接片连接。沿上述第一预设方向，一最外侧(如图2中最低侧)的第二连接片朝背离所连接的第二极片220的中心延伸，而其余的第二连接片分别自相应的第二平直段202起始延伸至靠近或贴合该最外侧的第二连接片，各第二连接片之间焊接固定以共同组成上述第二连接部。第二延伸片相对第二连接片弯折设置，其沿上述第一预设方向X延伸。该第二延伸片沿上述第四预设方向相对的两个细长表面分别呈连续弯曲状，任一细长表面均具有朝向另一细长表面凹陷的凹陷部，以及背向所述另一细长表面凸出设置的凸出部；各第二导电片同一侧中对应的各个凹陷部形成上述第三凹陷面域，同一侧中对应的各个凸出部形成上述第三凸出面域。各第二延伸片层叠设置以形成第二延伸部，同一侧的所述细长表面构成上述第三侧面。
较优地，第二导电片与上述第二集流体221一体成型，即是：第二导电片与第二集流体221由同一金属箔材减材成型。由于第二极片220厚度极小，将第二极耳400与各第二极片220分别焊接的工艺难度是极高且繁琐的；而第二导电片与第二集流体221一体成型，将各第二导电片层叠组成第二极耳400的设置可有效克服上述弊端。值得一提的是，整个电极组件200的厚度等于各第二极片220、隔离膜230、第二极片220以及隔离膜230的厚度总和，同时第二极片220的厚度等于第二集流体221与涂覆于第二集流体221表面的第二活性材料层的厚度之和；第二导电片的厚度与第二集流体的厚度相等，故而各第二导电片层叠后形成的第二极耳400的厚度与整个电极组件200的厚度相比是极小的。
应当理解：即是本实施例中第二延伸部连续弯曲状结构具体是由沿上述第四预设方向凹陷的第三凹陷面域，以及沿上述第四预设方向凸出设置的第三凸出面域共同确定的，但本申请并不局限于此。例如，在本申请其他的一些实施例中，第二延伸部具有沿第五预设方向相对设置的两第四侧面；每一第二侧面均具有朝向另一第四侧面凹陷设置第四凹陷面域，以及背向另一第四侧面凸出设置的第四凸出面域；该第四凹陷面域与第四凸出面域交替设置，亦可以使得第二延伸部沿第一预设方向X延伸并呈连续弯曲状，以实现降低纽扣电池1跌落过程第二极耳断裂的隐患。其中，所述“第五预设方向”为同时与上述第一预设方向X及上述第二平直段202延伸方向相垂直的方向；本实施例中，第五 预设方向与上述第三预设方向Z为同一方向，但在本申请的其他实施例中，第五预设方向可以根据第二平直段202的具体设置方式而发生变化。当然，在本申请其他的另一些实施例中，第而延伸部还可以沿上述第三预设方向Z延伸，并呈连续弯曲状，其同样可实现降低第二极耳400断裂隐患的效果；但与前两种实施方式相比，这一实施方式将使得纽扣电池1沿第三预设方向Z的尺寸变得更大，不利于纽扣电池1的小型化。
本申请实施例提供的纽扣电池1包括壳组件100、电极组件200、第一极耳300与第二极耳400。其中，壳组件100包括第一导电部110与第二导电部120，该第一导电部110与第二导电部120之间绝缘。电极组件200包括极性相反的第一极片210与第二极片220。第一极耳300包括分别与各第一极片210连接的第一连接部310，以及沿第一预设方向X延伸并呈连续弯曲状的第一延伸部320；第一导电部110与第二导电部120中的一个与第一极片210连接。
与目前市场上的纽扣电池相比，本申请实施例提供的纽扣电池1在跌落时，壳组件100内部的电极组件200相对壳组件发生位移；由于第一极耳300的第一延伸部320呈连续弯曲状，其在该过程中在冲击力的作用下容易受力变形(如拉伸或收缩)，并可通过该变形过程来吸收部分冲击力的能量。故本申请实施例提供的纽扣电池1能够有效降低纽扣电池跌落时，极耳断裂的隐患。
基于同一发明构思，本申请还提供一种用电装置，该用电装置包括负载以及上述实施例中的纽扣电池1，该纽扣电池1用于为负载供电。由于包括了上述实施例中的纽扣电池1，故该用电装置亦能够有效降低其内的纽扣电池跌落时，极耳断裂的隐患。
需要说明的是，本申请的说明书及其附图中给出了本申请的较佳的实施例，但是，本申请可以通过许多不同的形式来实现，并不限于本说明书所描述的实施例，这些实施例不作为对本申请内容的额外限制，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。并且，上述各技术特征继续相互组合，形成未在上面列举的各种实施例，均视为本申请说明书记载的范围；进一步地，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本申请所附权利要求的保护范围。

Claims (12)

  1. 一种纽扣电池，包括壳组件、电极组件、第一极耳与第二极耳，其特征在于；
    所述壳组件设有收容腔，且包括第一导电部与第二导电部，所述第一导电部与所述第二导电部之间绝缘；
    所述电极组件收容于所述收容腔，且包括第一极片、第二极片与隔离膜，所述第一极片与所述第二极片的极性相反且沿第一预设方向交替堆叠设置，所述第一极片和所述第二极片之间设有所述隔离膜；
    所述第一极耳收容于所述收容腔，且包括第一连接部与第一延伸部，所述第一连接部分别与各所述第一极片连接，所述第一延伸部沿所述第一预设方向延伸并呈弯曲状，所述第一延伸部的第一端与所述第一连接部连接，所述第一导电部与所述第二导电部中的一个与所述第一延伸部的第二端连接；
    所述第二极耳收容于所述收容腔，且分别与各第二极片连接，所述第一导电部与所述第二导电部中的另一个与所述第二极耳连接。
  2. 根据权利要求1所述的纽扣电池，其特征在于，所述第一极片的外轮廓包括平直延伸的第一平直段，各所述第一平直段基本对齐设置；
    所述第一连接部分别连接各所述第一平直段；
    所述第一延伸部具有沿第二预设方向相对设置的两第一侧面，每一所述第一侧面具有朝向另一第一侧面凹陷设置的第一凹陷面域，以及背向所述另一第一侧面凸出设置的第一凸出面域；其中，所述第二预设方向与所述第一平直段延伸的方向平行。
  3. 根据权利要求1所述的纽扣电池，其特征在于，所述第一极片包括平直延伸的第一平直段，各所述第一平直段基本对齐设置；
    所述第一连接部分别连接各所述第一平直段；
    所述第一延伸部具有沿第三预设方向相对设置的两第二侧面，每一第二侧面具有朝向另一第二侧面凹陷设置的第二凹陷面域，以及背向所述另一第二侧面凸出设置的第二凸出面域；
    其中，所述第三预设方向同时与所述第一预设方向及所述第一平直段的延伸的方向垂直。
  4. 根据权利要求1至3任一项所述的纽扣电池，其特征在于，所述第一延伸部呈连续弯曲状。
  5. 根据权利要求2或3所述的纽扣电池，其特征在于，所述第一极耳包括复数个第一导电片；
    所述第一导电片与所述第一极片一一对应，所述第一导电片自所述第一平直段向外延伸形成；
    所述第一导电片包括第一连接片与第一延伸片，所述第一连接片与所述第一平直段连接，所述第一延伸片与所述第一连接片连接；
    其中，一最外侧的第一连接片背离所连接的所述第一极片的中心延伸，其余的第一连接片自相应的第一平直段起始延伸至靠近或贴合所述一最外侧的第一连接片，各所述第一连接片共同组成所述第一连接部，各所述第一延伸片层叠设置以形成所述第一延伸部。
  6. 根据权利要求5所述的纽扣电池，其特征在于，所述第一极片包括第一集流体以及设于所述第一集流体表面的第一活性材料层；
    所述第一导电片自所述第一集流体的边缘向外延伸形成，所述第一导电片与所述第一集流体一体成型。
  7. 根据权利要求1所述的纽扣电池，其特征在于，所述第二极耳包括第二连接部与第二延伸部，所述第二连接部分别与各所述第二极片连接，所述第二延伸部沿所述第一预设方向延伸并呈弯曲状，所述第二延伸部的第一端与所述第二连接部连接；
    所述第一导电部与所述第二导电部中的一个与所述第一延伸部连接，所述第一导电部与所述第二导电部中的另一个与所述第二延伸部的第二端连接。
  8. 根据权利要求7所述的纽扣电池，其特征在于，所述第二极片的外轮廓包括平直延伸的第二平直段，各所述第二极片的第二平直段基本对齐设置；
    所述第二连接部分别连接各所述第二极片的第二平直段；
    所述第二延伸部具有沿第四预设方向相对设置的两第三侧面，每一第三侧面具有朝向另一第三侧面凹陷设置的第三凹陷面域，以及背向所述另一第三侧面凸出设置的第三凸出面域；其中，所述第四预设方向与所述第二平直段的延伸方向平行。
  9. 根据权利要求7或8所述的纽扣电池，其特征在于，所述第二延伸部呈连续弯曲状。
  10. 根据权利要求8所述的纽扣电池，其特征在于，所述第二极耳包括复数个第二导电片；
    所述第二导电片与所述第二极片一一对应，所述第二导电片自所述第二平直段向外延伸形成；
    所述第二导电片包括第二连接片与第二延伸片，所述第二连接片与所述第二平直段连接，所述第二延伸片与所述第二连接片连接；
    其中，一最外侧的第二连接片背离所连接的所述第二极片的中心延伸，其余的第二连接片自相应的第二平直段起始延伸至靠近或贴合所述一最外侧的第二连接片，各所述第二连接片共同组成所述第二连接部，各所述第二延伸片层叠设置以形成所述第二延伸部。
  11. 根据权利要求1所述的纽扣电池，其特征在于，所述第一导电部包括第一壁部、第二壁部以及连接壁，所述第一壁部与所述第二壁部沿所述第一预设方向相对设置，所述连接壁连接所述第一壁部与所述第二壁部，所述第一壁部、第二壁部与连接壁共同围成所述收容腔；
    所述连接壁设有贯通的安装孔，所述第二导电部通过绝缘件安装于所述安装孔。
  12. 一种用电装置，其特征在于，包括如权利要求1至11中任一项所述的纽扣电池。
PCT/CN2021/079341 2021-03-05 2021-03-05 纽扣电池以及用电装置 WO2022183492A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160149193A1 (en) * 2014-11-26 2016-05-26 Samsung Sdi Co., Ltd. Rechargeable battery with tabs
CN109713207A (zh) * 2019-01-31 2019-05-03 柔电（武汉）科技有限公司 一种极耳优化的柔性电池及极耳优化工艺
CN212182429U (zh) * 2020-06-24 2020-12-18 淮安骏盛新能源科技有限公司 一种高强度结构模组
CN112106227A (zh) * 2018-03-28 2020-12-18 本田技研工业株式会社 固体电池用集电体极耳、集电体、及电极片
CN212380518U (zh) * 2020-07-28 2021-01-19 曙鹏科技（深圳）有限公司 纽扣电池
CN212571272U (zh) * 2020-08-10 2021-02-19 北京小米移动软件有限公司 离子电池和终端设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5966695B2 (ja) * 2012-07-05 2016-08-10 株式会社豊田自動織機 蓄電装置
CN207021330U (zh) * 2017-05-03 2018-02-16 东莞塔菲尔新能源科技有限公司 一种电池连接片
CN110880563B (zh) * 2019-10-10 2021-12-14 宁德新能源科技有限公司 电池壳体组件及具有所述电池壳体组件的电池
CN111490220A (zh) * 2020-05-07 2020-08-04 赣州诺威科技有限公司 纽扣电池用极片、纽扣电池及其制备方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160149193A1 (en) * 2014-11-26 2016-05-26 Samsung Sdi Co., Ltd. Rechargeable battery with tabs
CN112106227A (zh) * 2018-03-28 2020-12-18 本田技研工业株式会社 固体电池用集电体极耳、集电体、及电极片
CN109713207A (zh) * 2019-01-31 2019-05-03 柔电（武汉）科技有限公司 一种极耳优化的柔性电池及极耳优化工艺
CN212182429U (zh) * 2020-06-24 2020-12-18 淮安骏盛新能源科技有限公司 一种高强度结构模组
CN212380518U (zh) * 2020-07-28 2021-01-19 曙鹏科技（深圳）有限公司 纽扣电池
CN212571272U (zh) * 2020-08-10 2021-02-19 北京小米移动软件有限公司 离子电池和终端设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4300698A4 *

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