WO2022155855A1 - 电芯、电池及用电装置 - Google Patents

电芯、电池及用电装置 Download PDF

Info

Publication number
WO2022155855A1
WO2022155855A1 PCT/CN2021/073138 CN2021073138W WO2022155855A1 WO 2022155855 A1 WO2022155855 A1 WO 2022155855A1 CN 2021073138 W CN2021073138 W CN 2021073138W WO 2022155855 A1 WO2022155855 A1 WO 2022155855A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
battery
encapsulation
packaging
battery cell
Prior art date
Application number
PCT/CN2021/073138
Other languages
English (en)
French (fr)
Inventor
闫东阳
袁尹明月
董宇洋
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 PCT/CN2021/073138 priority Critical patent/WO2022155855A1/zh
Priority to CN202180002842.9A priority patent/CN113711427A/zh
Publication of WO2022155855A1 publication Critical patent/WO2022155855A1/zh
Priority to US18/193,049 priority patent/US20230238618A1/en

Links

Images

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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/109—Primary casings, jackets or wrappings of a single cell or a single battery 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/121—Organic material
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • H01M50/126—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • 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 of a single cell or a single battery
    • 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
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • 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
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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 of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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 of a single cell or a single battery
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular 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
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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 battery manufacturing, and in particular, to a battery cell, a battery and an electrical device.
  • the existing smart wearable device is provided with a battery to supply power, and the more commonly used battery is packaged in a metal casing, but the excessive weight of the product will reduce the user's satisfaction with the use experience.
  • a soft-packaged battery is used instead.
  • the soft-packaged battery reduces the overall weight and cost of the battery.
  • the sealing part of the packaging film is perpendicular to the side curved surface of the cell cylinder, the circumference of the sealing part is The circumference of the outermost ring is larger than the circumference of the cell body after the surface of the mold is bent, thus forming wavy folds as shown in FIG. 1 , and the wavy folds waste space on the cell plane.
  • An embodiment of the present application provides a battery cell including an electrode assembly and a casing, the electrode assembly includes tabs and is disposed in the casing, the casing includes an encapsulation part and a sealing part connected to the encapsulation part, The sealing part is formed by extending outward from the packaging part, the electrode assembly is located in the packaging part, the tabs protrude outward from the sealing part, the packaging part includes a side wall, and the sealing part A notch is opened on the upper part, the notch is formed by the concave formation of the outer peripheral edge of the sealing part toward the connection between the sealing part and the packaging part, and the sealing part is attached to the side wall.
  • the housing includes a first encapsulation film and a second encapsulation film
  • the first encapsulation film includes a first portion and a first edge portion connected to the first portion
  • the second encapsulation film includes A second portion and a second edge portion connected to the second portion
  • the first portion and the second portion enclose the packaging portion
  • the first edge portion and the second edge portion are connected to form the sealing part.
  • the first part is recessed to form a first receiving cavity, and the vertical section of the first receiving cavity is an inverted U shape; the second part is flat and closes the first part to form the encapsulation part.
  • the first part is recessed to form a first accommodating cavity, and the vertical cross-section of the first accommodating cavity is an inverted U shape; the second part is concave to form a second accommodating cavity, and the second The vertical section of the accommodating cavity is U-shaped; the first accommodating cavity and the second accommodating cavity are enclosed to form the packaging portion.
  • the notch is at least one of an arc shape, a V shape, a semicircle, a U shape, and a polygon.
  • the minimum distance between the edge of the notch and the connection between the packaging part and the sealing part is greater than or equal to 0.5 mm.
  • the encapsulation part includes a first end surface and a second end surface opposite to the first end surface, the first end surface and the second end surface are respectively connected to the side wall, and the The distance from the connection between the sealing part and the packaging part to the first end surface is greater than or equal to the distance from the connection to the second end surface.
  • the battery core further includes a first adhesive member, one end of the first adhesive member is disposed on the side wall, the first end face or the second end face, the first The other end of the adhesive member is arranged on the surface of the sealing part facing away from the packaging part, and is used for fixing the sealing part on the packaging part.
  • the battery core further includes a second adhesive member, and the second adhesive member is provided between the side wall and the surface of the sealing portion close to the packaging portion, so as to The sealing part is fixed on the packaging part.
  • An embodiment of the present application further provides a battery, including a casing and any one of the above-mentioned battery cells, wherein the battery core is accommodated in the casing.
  • Embodiments of the present application also provide an electrical device, including a body and the above-mentioned battery, wherein the battery is accommodated in the body.
  • the sealing part in the cell, battery and electrical device provided by the present application, by arranging a notch on the sealing part, when the sealing part is attached to the side wall of the packaging part, the area of the sealing part can be reduced, so that the sealing part can be attached to the packaging part. It can be more flat when the sealing part is on, and the wavy appearance between the sealing part and the packaging part can be effectively avoided.
  • FIG. 1 is a schematic top view of a sealing portion of a packaging film in the prior art after being bent.
  • FIG. 2 is a schematic three-dimensional structure diagram of a battery cell in an embodiment of the present application.
  • FIG. 3 is a first schematic top view of the cell shown in FIG. 2 when the sealing portion is not attached to the sidewall of the packaging portion.
  • FIG. 4 is a schematic cross-sectional view of the cell shown in FIG. 3 along the A-A direction.
  • FIG. 5 is a schematic cross-sectional view of the cell shown in FIG. 3 along the B-B direction.
  • FIG. 6 is a schematic cross-sectional view of another electrode assembly (laminated structure) used in a battery cell according to an embodiment of the present application.
  • FIG. 7 is a second schematic top view of the cell in which the sealing portion is not attached to the sidewall of the packaging portion.
  • FIG. 8 is a first schematic top view of the sealing part in the cell shown in FIG. 2 attached to the side wall of the packaging part.
  • FIG. 9 is a schematic cross-sectional view of the cell shown in FIG. 8 along the C-C direction.
  • FIG. 10 is a third schematic top view of the cell in which the sealing portion is not attached to the sidewall of the packaging portion.
  • FIG. 11 is a fourth schematic top view in which the sealing part in the cell is not attached to the side wall of the packaging part.
  • FIG. 12 is a fifth schematic top view of the cell in which the sealing portion is not attached to the sidewall of the packaging portion.
  • FIG. 13 is a sixth schematic top view in which the sealing part in the cell is not attached to the side wall of the packaging part.
  • FIG. 14 is a seventh schematic top view of the cell in which the sealing portion is not attached to the sidewall of the packaging portion.
  • FIG. 15 is an exploded schematic view of the cell shown in FIG. 6 .
  • 16 is a schematic cross-sectional view of a cell including an insulating sheet in an embodiment of the present application.
  • FIG. 17 is a schematic three-dimensional structure diagram of a cell in another embodiment of the present application.
  • FIG. 18 is a schematic cross-sectional view of the cell shown in FIG. 17 along the D-D direction.
  • FIG. 19 is a schematic cross-sectional view of a cell including a first adhesive member according to an embodiment of the present application.
  • FIG. 20 is a schematic cross-sectional view of a battery cell including a second adhesive member according to an embodiment of the present application.
  • FIG. 21 is a schematic three-dimensional structure diagram of a battery in an embodiment of the present application.
  • FIG. 22 is a schematic three-dimensional structural diagram of an electrical device according to an embodiment of the present application.
  • the first packaging film 24, 24a is the first packaging film 24, 24a
  • the second packaging film 25, 25a is the second packaging film 25, 25a.
  • a component when a component is considered to be “connected” to another component, it can be directly connected to another component or there may be an intervening component at the same time. When a component is considered to be “set on” another component, it may be located directly on the other component or may co-exist with an intervening component.
  • the terms “top,” “bottom,” “top,” “bottom,” “left,” “right,” “front,” “back,” and similar expressions are used herein for illustrative purposes only.
  • An embodiment of the present application provides a battery cell, including an electrode assembly (which may be a wound structure or a laminated structure) and a casing, the electrode assembly includes a tab, and the electrode assembly is arranged in the casing, so
  • the housing includes an encapsulation part and a sealing part connected with the encapsulation part, the sealing part is formed by extending outward from the encapsulation part, the electrode assembly is located in the encapsulation part, and the tabs extend from the sealing part to the outside.
  • the encapsulation part includes a side wall, a notch is formed on the seal part, and the notch is formed by a recess from the outer periphery of the seal part to the connection between the seal part and the encapsulation part, and the sealing portion is attached to the side wall.
  • the sealing part is attached to the side wall of the packaging part, the area of the circumferential part of the sealing part is reduced, and the sealing part is attached to the side wall of the packaging part.
  • the encapsulation portion is more flat when placed on it, which avoids the appearance of waves on the surface of the encapsulation portion, improves the utilization rate of the sealing portion, and reduces the area occupied by the battery cells.
  • Embodiments of the present application further provide a battery, including a housing and the above-mentioned battery cells, wherein the battery cells are accommodated in the housing.
  • the battery adopts the above-mentioned battery cells, which can further improve the space utilization rate inside the casing. Since the volume occupied by the battery cells is smaller, it is convenient to optimize the internal structure of the battery. At the same time, since the occupied volume of the battery cell is reduced, the volume of the battery can also be reduced accordingly.
  • the implementation of the present application also provides an electronic device, including a body and the above-mentioned battery, and the battery is accommodated in the body.
  • the headset adopts the above-mentioned battery, which can further reduce the weight of the headset and bring a more comfortable experience to the user.
  • the battery cell 100 provided by the present application includes an electrode assembly 10 and a casing 20 , the electrode assembly 10 is provided in the casing 20 , and the casing 20 is used to encapsulate the electrode assembly 10 , so that The electrode assembly 10 can conduct current during use, and provide electrical energy to an electrical device using the battery cell 100 .
  • FIG. 4 and FIG. 5 are schematic cross-sectional views of the case 20 before the electrode assembly 10 is completely encapsulated.
  • the electrode assembly 10 includes a plurality of first pole pieces 11 and a plurality of second pole pieces 12, a plurality of the first pole pieces 11 and a plurality of the second pole pieces 12 are alternately stacked, and each of the first pole pieces 11 and the plurality of the second pole pieces 12 are alternately stacked.
  • An isolation film (not shown) is arranged between one pole piece 11 and the second pole piece 12 , and the first pole piece 11 and the second pole piece 12 are spaced apart by the isolation film to prevent the The first pole piece 11 and the second pole piece 12 are in contact with each other and a short circuit occurs, and at the same time, the normal passage of ions in the process of charging and discharging is ensured.
  • the electrode assembly 10 can also be formed by winding, and along the stacking or winding direction, the cross-section of the electrode assembly 10 presents different shapes.
  • the electrode assembly 10 further includes a first tab 13 and a second tab 14 , the first tab 13 is connected to the first pole piece 11 , and the second tab 14 is connected to the second pole piece 12 . , the first pole piece 11 and the second pole piece 12 extend from the inside of the casing 20 to connect with the external structure.
  • the battery core 100 further includes an insulating glue 15 , and the insulating glue 15 is arranged between the first tab 13 , the second tab 14 and the casing 20 .
  • the first tab 13 and the second tab 14 are connected to the housing 20 through the insulating glue 15 , and the connection position is sealed at the same time, so as to improve the sealing effect of the battery cell 100 .
  • the insulating glue 15 is tab glue.
  • the insulating glue 15 can also be replaced with other structures with equivalent functions or functions.
  • first pole piece 11 and the second pole piece 12 are stacked in a vertical direction, and the first pole lug 13 and the second pole lug 14 are connected to each other from the outer surface of the housing 20 .
  • the opposite sides extend out to reduce the contact between the first tab 13 and the second tab 14 .
  • the first pole piece 11 is a positive pole piece
  • the first pole lug 13 is a positive pole piece
  • the second pole piece 12 is a negative pole piece
  • the second pole lug 14 is Negative tab.
  • the first tab 13 and the second tab 14 include aluminum, nickel, manganese, cadmium, copper, iron, magnesium, silicon, titanium, zirconium, vanadium At least one of elements, zinc elements, lead elements, sulfur elements, phosphorus elements, tin elements, arsenic elements, bismuth elements, and antimony elements.
  • first pole piece 11 The materials and processes for making the first pole piece 11 , the second pole piece 12 , the first pole lug 13 , the second pole lug 14 and the isolation membrane are relatively common in the prior art , and will not be repeated here.
  • a plurality of the first pole pieces 11 and a plurality of the second pole pieces 12 may also be stacked or wound in a vertical direction.
  • first tab 13 and the second tab 14 may be disposed adjacent to each other, keeping the distance between the first tab 13 and the second tab 14 . There is a certain interval between them to avoid contact between the two.
  • the housing 20 includes an encapsulation part 21 and a sealing part 22 , the encapsulation part 21 is connected with the sealing part 22 , and further, the sealing part 22 extends outward from the encapsulation part 21
  • the encapsulation part 21 is extended to accommodate the electrode assembly 10 , and the first tab 13 and the second tab 14 protrude outward from the sealing part 22 to extend to the outside of the casing 20 , so as to be able to connect to the external structure.
  • the sealing portion 22 is provided at the lower end of the encapsulating portion 21 .
  • the casing 20 includes polyethylene, polypropylene, polyester, nylon, polyphenylene ether, aluminum foil and aluminum alloy foil, magnesium foil and magnesium alloy foil, titanium foil and titanium alloy foil, copper foil and copper alloy foil, At least one of iron foil and iron alloy foil, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, polystyrene, polycarbonate, and styrene-acrylonitrile copolymer.
  • the shell 20 is made of at least one of the above materials, for example, polyethylene is used to make the shell 20 , which can reduce the weight of the shell 20 , thereby reducing the overall weight of the battery core 100 .
  • the encapsulation part 21 includes a side wall 211 , and further, the side wall 211 is an outer side wall 211 of the encapsulation part 21 , when the sealing part 22 is connected to the packaging part 21 , the sealing part 22 is attached on the outer sidewall 211 of the package portion 21 , as shown in FIG. 6 .
  • the “outer” in the outer sidewall 211 is a description relative to the encapsulation portion 21 containing the inside of the electrode assembly 10 .
  • the sealing portion 22 is provided with a slot 221 , and the slot 221 is recessed from the outer periphery of the sealing portion 22 to the connection 23 of the sealing portion 21 and the sealing portion 22 .
  • the outer peripheral edge of the sealing portion 22 is the edge of the sealing portion 22 away from the package, that is, the outermost position of the sealing portion 22 .
  • the minimum distance between the edge of the notch 221 and the connection 23 of the packaging part 21 and the sealing part 22 is d, and d is greater than or equal to 0.5 mm.
  • the edge of the notch 221 refers to the edge with the farthest distance recessed from the outer periphery of the sealing portion 22 to the connection portion 23, and the minimum distance d is set to be equal to or greater than 0.5 mm, in order to avoid the sealing portion 22
  • the internal structure of the encapsulation part 21 is exposed because the distance between the sealing part 22 and the encapsulation part 21 is too small, so that the electrode assembly 10 cannot be packaging, resulting in the situation that the battery cell 100 cannot be used.
  • the shape of the notch 221 is roughly V-shaped. It can be understood that “roughly” here means looking like, but not absolutely V-shaped, and the notch 221 is close to the connection 23 . may be an arc transition connection.
  • the sealing portion 22 is provided with a plurality of notches 221 , and the plurality of notches 221 are arranged at intervals, thereby effectively reducing the overall area of the sealing portion 22 .
  • FIG. 8 shows the situation in which the sealing portion 22 is attached to the side wall 211 of the packaging portion 21 after being bent at the position of the connecting portion 23 . Since the sealing portion 22 is provided with the notch 221, the area of the sealing portion 22 is reduced, and when the sealing portion 22 is attached to the packaging portion 21, the sealing portion 22 can be evenly attached to the side There will be no wrinkles on the wall 211 , which reduces the overall volume of the battery cell 100 and improves the space utilization rate of the sealing portion 22 .
  • the shape of the notch 221 is not limited to the above-mentioned substantially V-shape.
  • the notch 221 may also be U-shaped, polygonal, irregular arc, etc.
  • the sealing portion 22 is provided with a plurality of notches 221 with different shapes.
  • the notches 221 may also be in a circular arc shape or a semicircle, and a plurality of circular arc or semicircular notches 221 are arranged at equal distances. As shown in FIG.
  • the notches 221 may also be in a shape similar to a trapezoid, and a plurality of notches 221 in the trapezoid shape are arranged at equal distances.
  • the number of the slots 221 can also be set according to different needs.
  • the sealing portion 22 is provided with two notches 221, and the two notches 221 are symmetrically arranged.
  • the sealing portion 22 is provided with three notches 221 , and the three notches 221 are arranged at intervals.
  • the area of the sealing portion 22 can also be changed, so that the cells 100 of different sizes can be packaged in this way, thereby improving the sealing portion 22 . Space utilization.
  • the casing 20 can be divided into the encapsulation part 21 and the sealing part 22 by area division.
  • the housing 20 includes a first packaging film 24 and a second packaging film 25 .
  • the first encapsulation film 24 includes a first portion 241 and a first edge portion 242 connected to the first portion 241
  • the second encapsulation film 25 includes a second portion 251 and a second portion 251 connected to the second portion 251 .
  • the edge part 252 , the first part 241 and the second part 251 surround the packaging part 21 , and the first edge part 242 and the second edge part 252 are connected to form the sealing part 22 .
  • the first portion 241 is an inverted U-shaped first receiving cavity, and the first edge portion 242 extends from the end of the first portion 241 close to the second packaging portion 21 in a horizontal direction and The opposite sides extend a preset length.
  • the second portion 251 is flat, and the second edge portion 252 extends from the end portion of the second portion 251 along the horizontal direction and opposite sides for a predetermined length, and is parallel to the first edge portion 242 . correspond.
  • the flat second portion 251 closes the inverted U-shaped first portion 241 to form the encapsulation portion 21 .
  • the first edge portion 242 and the second edge portion 252 are connected to form the sealing portion 22 .
  • the battery core 100 further includes an insulating sheet 16 , and the insulating sheet 16 is provided on the Between the electrode assembly 10 and the casing 20 , the contact between the electrode assembly 10 and the casing 20 is avoided. Further, the insulating sheet 16 is an insulating gasket.
  • the insulating sheet 16 is not limited to this, and can also be replaced with other forms, for example, replaced with insulating paint with insulating effect, sprayed on the housing 20, or achieve the effect of insulation.
  • the present application also provides another battery cell 100a, which is substantially the same as the battery cell 100 in the first embodiment, except that the sealing portion 22a is formed from the sealing portion 21a from the packaging portion 21a.
  • the sidewall 211a of the 211a is formed to extend outward. Viewed from the direction shown in FIG. 18 , the sealing portion 22a is located approximately in the middle of the packaging portion 21a.
  • the packaging portion 21a includes a first end surface 212a and a second end surface 213a, the first end surface 212a and the second end surface 213a are disposed opposite to each other, and the first end surface 212a and the second end surface 213a are respectively opposite to the The side walls 211a are connected, and the distance from the connection 23a of the sealing part 22a and the package part 21a to the first end surface 212a is greater than or equal to the distance from the connection 23a to the second end surface 213a.
  • the distance from the connection point 23a to the first end surface 212a is greater than or equal to the distance from the connection point 23a to the second end surface 213a, so that the sealing portion 22a is attached to the packaging portion during bending
  • the distance that the sealing portion 22a extends along the side wall 211a can be reduced, so that the sealing portion 22a can better adhere to the side wall 211a by itself.
  • the first portion 241a of the first encapsulation film 24a is an inverted U-shaped first receiving cavity
  • the second portion 251a of the second encapsulation film 25a is a U-shaped second cavity.
  • the accommodating cavity, the inverted U-shaped first portion 241a and the U-shaped second portion 251a are closed to form the packaging portion 21a.
  • the first edge portion 242a extends for a predetermined length from the end of the first portion 241a close to the second edge portion 252a in the horizontal direction and opposite sides, and the second edge portion 252a extends from the second portion
  • the end portion of 251a close to the first edge portion 242a extends for a predetermined length along the horizontal direction and opposite sides, and corresponds to the first edge portion 242a, the first edge portion 242a and the second edge portion 252a forms the sealing portion 22a.
  • the cell 100b in the third embodiment has substantially the same structure as the cell 100a in the second embodiment, the difference is that the cell 100b in the third embodiment further includes the first adhesive member 26, so One end of the first adhesive member 26 is disposed on the side wall 211b, the first end surface 212b or the second end surface 213b, and the other end of the first adhesive member 26 is disposed on the sealing portion 22b On the surface facing away from the packaging part 21b, the sealing part 22b is used to fix the sealing part 22b on the packaging part 21b.
  • the first adhesive member 26 is bonded to the side wall 211b and the sealing portion 22b superior.
  • the sealing portion 22b is prevented from rebounding after being bent, thereby affecting the battery cell 100b in the battery assembled.
  • the first adhesive member 26 includes polyethylene oxide, polyvinylidene fluoride, styrene-butadiene rubber, polymers of vinylidene fluoride and hexafluoropropylene, polyvinylidene fluoride, modified polyvinylidene fluoride, polyvinylidene At least one of acrylate, modified polyacrylate, modified polyethylene, modified polydiene and other materials.
  • the first adhesive member 26 is adhesive tape. It can be understood that, in other embodiments, the first adhesive member 26 can also be replaced with other structures with equivalent functions or functions.
  • the cell 100c in the fourth embodiment is substantially the same in structure as the cell 100a in the second embodiment, the difference is that the cell 100c in the fourth embodiment further includes a second adhesive member 27, so The second adhesive member 27 is disposed between the side wall 211c and the surface of the sealing portion 22c close to the packaging portion 21c, so as to fix the sealing portion 22c on the packaging portion 21c.
  • the sealing portion 22c is prevented from rebounding after being bent, thereby affecting the battery cell 100c in the battery assembled in.
  • the second adhesive member 27 includes polyethylene oxide, polyvinylidene fluoride, styrene-butadiene rubber, polymers of vinylidene fluoride and hexafluoropropylene, polyvinylidene fluoride, modified polyvinylidene fluoride, polyvinylidene At least one of acrylate, modified polyacrylate, modified polyethylene, modified polydiene and other materials.
  • the second adhesive member 27 is a double-sided adhesive tape. It can be understood that, in other embodiments, the second adhesive member 27 can also be replaced with a structure with the same function or function.
  • an embodiment of the present application further provides a battery 300 , which includes a casing 30 and cells 100 , 100 a , 100 b , 100 c as in any of the above embodiments, the cells 100 , 100 a , 100 b , 100c is accommodated in the casing 30 .
  • the battery 300 includes any of the battery cells 100 , 100 a , 100 b , 100 c in the above embodiments, and thus has all the beneficial effects of the battery cells 100 , 100 a , 100 b , and 100 c , which are not repeated here.
  • the battery further includes a circuit board (not shown), a connecting sheet (not shown) and other structures, and the tabs on the battery cells 100, 100a, 100b, 100c pass through The connecting piece is welded on the circuit board.
  • This middle structure is relatively common in the battery field, and will not be repeated here.
  • the tabs of the battery cells 100 , 100 a , 100 b , and 100 c form the positive and negative electrodes of the battery, so that the battery can be used directly in an electrical device.
  • an embodiment of the present application further provides an electrical device 500 including a main body 50 and a battery 300 as in the above-mentioned embodiment. Power is supplied so that the body 50 can obtain electrical energy and thus be usable.
  • the electrical device 500 includes the battery 300 in the above-mentioned embodiment, and thus has all the beneficial effects of the battery 300, which will not be repeated here.
  • the powered device 500 is specifically a wireless Bluetooth headset. It can be understood that, in other implementations, the electrical device 500 may also be other smart wearable devices, such as a sports watch, a small lighting device, and the like.
  • the notches 221 are formed on the sealing portion 22 to reduce the adhesion of the sealing portion 22 to the sealing portion 22 .
  • the area on the encapsulation part 21 avoids the occurrence of wrinkles when the sealing part 22 is arranged on the encapsulation part 21 . Therefore, the volume of the battery cell 100 can be reduced, and in the structure using the battery cell 100 , the space utilization rate can be improved.

Abstract

本申请提供一种电芯，包括电极组件和外壳，所述电极组件包括极耳，且所述电极组件设于所述外壳内，所述外壳包括封装部和与所述封装部连接的密封部，所述密封部由所述封装部向外延伸形成，所述电极组件位于所述封装部内，所述极耳从所述密封部向外穿出，所述封装部包括侧壁，所述密封部上开设有槽口，所述槽口由所述密封部的外周缘向所述密封部与所述封装部的连接处凹陷形成，且所述密封部贴附于所述侧壁。本申请还涉及一种电池及用电装置，通过采用上述电芯，能够减小外壳密封部的面积，避免造成密封部的空间浪费问题。

Description

电芯、电池及用电装置 技术领域
本申请涉及电池制造技术领域，尤其涉及一种电芯、电池及用电装置。
背景技术
现有的智能穿戴设备中设置电池为其进行供电，而较为常用的电池通过是采用金属外壳包装，但是过高的产品重量会降低用户的使用体验满意程度。为了解决此问题，现有技术中采用软包装电池进行替代，软包装的电池降低了电池整体的重量和成本问题，但是由于包装膜的密封部位垂直于电芯圆柱体的侧边曲面，密封部位的圆周型表面弯折后最外圈的周长较电芯主体的圆周大，因此形成了波浪形的褶皱，如图1中所示，而该波浪形的褶皱浪费电芯平面上的空间利用。
发明内容
有鉴于此，有必要提供一种电芯、电池及用电装置，旨在能够解决密封部位形成波浪形外观的情况。
本申请的实施例提供了一种电芯，包括电极组件和外壳，所述电极组件包括极耳且设于所述外壳内，所述外壳包括封装部和与所述封装部连接的密封部，所述密封部由所述封装部向外延伸形成，所述电极组件位于所述封装部内，所述极耳从所述密封部向外穿出，所述封装部包括侧壁，所述密封部上开设有槽口，所述槽口由所述密封部的外周缘向所述密封部与所述封装部的连接处凹陷形成，且所述密封部贴附于所述侧壁。
一种可能实现的方式中，所述外壳包括第一封装膜和第二封装膜，所述第一封装膜包括第一部分和与所述第一部分连接第一边缘部，所述第二封装膜包括第二部分和与所述第二部分连接的第二边缘部，所述第一部分和所述第二部分围设成所述封装部，所述第一边缘部和所述第二边缘部连接形成所述密封部。
一种可能实现的方式中，所述第一部分凹陷形成第一收容腔，所述第一收容腔的竖直剖面呈倒U型；所述第二部分呈平坦状且封闭所述第一部分以形成所述封装部。
一种可能实现的方式中，所述第一部分凹陷形成第一收容腔，所述第一收容腔的竖直剖面呈倒U型；所述第二部分凹陷形成第二收容腔，所述第二收容腔的竖直剖面呈U型；所述第一收容腔和所述第二收容腔围设成所述封装部。
一种可能实现的方式中，所述槽口呈弧形、V形、半圆形、U形、多边形中的至少一种。
一种可能实现的方式中，所述槽口的边缘与所述封装部及所述密封部的连接处之间的最小距离大于或者等于0.5mm。
一种可能实现的方式中，所述封装部包括第一端面和与所述第一端面相对的第二端面，所述第一端面和所述第二端面分别与所述侧壁连接，所述密封部与所述封装部的连接处至所述第一端面的距离大于或等于所述连接处至所述第二端面的距离。
一种可能实现的方式中，所述电芯还包括第一粘接件，所述第一粘接件的一端设于所述侧壁、第一端面或所述第二端面，所述第一粘接件的另一端设于所述密封部背离所述封装部的表面上，用于将所述密封部固定在所述封装部上。
一种可能实现的方式中，所述电芯还包括第二粘接件，所述第二粘接件设于所述侧壁与所述密封部靠近所述封装部的表面之间，用以将所述密封部固定在所述封装部上。
本申请的实施例还提供了一种电池，包括壳体和上述中任一电芯，所述电芯收容于所述壳体内。
本申请的实施例还提供了一种用电装置，包括本体和上述的电池，所述电池收容于所述本体内。
本申请提供的电芯、电池及用电装置，通过在密封部上设置槽口，将密封部贴附于封装部的侧壁上时，能够减小密封部的面积，使其贴附在封装部上时能够更加平整，有效避免密封部与封装部之间出现波浪外观的情况。
附图说明
图1为现有技术中包装膜的密封部弯折后的俯视示意图。
图2为本申请的一个实施例中电芯的立体结构示意图。
图3为图2所示的电芯中密封部未贴附在封装部侧壁上的第一俯视示意图。
图4为图3所示的电芯沿A-A方向的剖视示意图。
图5为图3所示的电芯沿B-B方向的剖视示意图。
图6为本申请的一个实施例中电芯采用另一种电极组件(叠片结构)的剖视示意图。
图7为电芯中密封部未贴附在封装部侧壁上的第二俯视示意图。
图8为图2中所示的电芯中密封部贴附在封装部侧壁上的第一俯视示意图。
图9为图8所示的电芯沿C-C方向的剖视示意图。
图10为电芯中的密封部未贴附在封装部侧壁上的第三俯视示意图。
图11为电芯中的密封部未贴附在封装部侧壁上的第四俯视示意图。
图12为电芯中的密封部未贴附在封装部侧壁上的第五俯视示意图。
图13为电芯中的密封部未贴附在封装部侧壁上的第六俯视示意图。
图14为电芯中的密封部未贴附在封装部侧壁上的第七俯视示意图。
图15为图6所示的电芯的分解示意图。
图16为本申请的一个实施例中电芯包括绝缘片的剖视示意图。
图17为本申请的另一个实施例中电芯的立体结构示意图。
图18为图17所示的电芯沿D-D方向的剖视示意图。
图19为本申请的一个实施例中电芯包括第一粘接件的剖视示意图。
图20为本申请的一个实施例中电芯包括第二粘接件的剖视示意图。
图21为本申请的一个实施例中电池的立体结构示意图。
图22为本申请的一个实施例中用电装置的立体结构示意图。
主要元件符号说明
电芯                          100、100a、100b、100c
电极组件                      10、10a
第一极片                      11
第二极片                      12
第一极耳                      13
第二极耳                      14
绝缘胶                        15
绝缘片                        16
外壳                          20、20a
封装部                        21、21a、21b、21c
侧壁                          211、211a、211b、211c
第一端面                      212a、212b
第二端面                      213a、213b
密封部                        22、22a、22b、22c
槽口                          221
最小距离                      d
连接处                        23、23a
第一封装膜                    24、24a
第一部分                      241、241a
第一边缘部                    242、242a
第二封装膜                    25、25a
第二部分                      251、251a
第二边缘部                    252、252a
第一粘接件                    26
第二粘接件                    27
电池                          300
壳体                          30
用电装置                      500
本体                          50
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实 施例。
需要说明的是，当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“顶”、“底”、“上”、“下”、“左”、“右”、“前”、“后”、以及类似的表述只是为了说明的目的。
除非另有定义，本文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。本文中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，不是旨在于限制本申请。
本申请的实施例提供了一种电芯，包括电极组件(可以是卷绕结构或叠片结构)和外壳，所述电极组件包括极耳，且所述电极组件设于所述外壳内，所述外壳包括封装部和与所述封装部连接的密封部，所述密封部由所述封装部向外延伸形成，所述电极组件位于所述封装部内，所述极耳从所述密封部向外穿出，所述封装部包括侧壁，所述密封部上开设有槽口，所述槽口由所述密封部的外周缘向所述密封部与所述封装部的连接处凹陷形成，且所述密封部贴附于所述侧壁。
采用该电芯，通过在所述密封部上设置槽口，当将所述密封部贴附于所述封装部的侧壁上时，因所述密封部的圆周部分面积减小，贴附在封装部上时更加的平整，避免所述封装部的表面出现波浪外观的情况，提升了所述密封部的利用率，同时也减小了所述电芯所占用的面积。
本申请的实施例还提供了一种电池，包括壳体和上述的电芯，所述电芯收容于所述壳体内。
该电池采用上述的电芯，能够进一步提升壳体内部的空间利用率，因所述电芯所占用的体积更小，便于优化电池内部的结构。同时，因所述电芯的占用体积减小，所述电池的体积也可随之减小。
本申请的实施还提供了一种电子装置，包括本体和上述的电池，所述电池收容于所述本体内。
以头戴式耳机为例，该耳机采用上述的电池，可以更进一步的减小耳机的重量，给用户带来更舒适的体验。
下面将结合附图对本申请的实施例作出说明。在不冲突的情况下，下述实施例及实施例中的特征可以相互结合。
第一实施例
请参阅图2和图3，本申请提供的电芯100包括电极组件10和外壳20，所述电极组件10设于所述外壳20内，所述外壳20用于封装所述电极组件10，使得所述电极组件10在使用时能够实现电流的导通，给采用该电芯100的用电装置提供电能。
请参阅图4和图5，图4和图5所展示的为所述外壳20还未完全将电极组件10封装好的剖视示意图。所述电极组件10包括多个第一极片11和多个第二极片12，多个所述第一极片11和多个所述第二极片12交替层叠设置，每一所述第一极片11和所述第二极片12之间设有隔离膜(图未示)，通 过所述隔离膜将所述第一极片11和所述第二极片12间隔开，防止所述第一极片11和所述第二极片12接触出现短路的情况，同时保证在充放电的过程中离子的正常通过。
可以理解的是，在其他实施例中，所述电极组件10也可通过卷绕的方式形成，且沿堆叠或卷绕的方向，所述电极组件10的横截面呈现不同的形状。
所述电极组件10还包括第一极耳13和第二极耳14，所述第一极耳13连接所述第一极片11，所述第二极耳14连接所述第二极片12，所述第一极片11和所述第二极片12从外壳20内部延伸出，以和外部结构连接。
优选的，为了保证所述外壳20与所述第一极耳13和所述第二极耳14之间紧密连接，避免外部杂质进入所述外壳20内部影响所述电极组件10的使用，同样也避免外壳20内的，例如电解液流出，所述电芯100还包括绝缘胶15，所述绝缘胶15设于所述第一极耳13、所述第二极耳14与所述外壳20之间，通过所述绝缘胶15使得所述第一极耳13、所述第二极耳14与所述外壳20连接，同时对连接位置进行密封，提高所述电芯100的密封效果。进一步地，所述绝缘胶15为极耳胶。
可以理解的是，在其他实施例中，所述绝缘胶15还可替换为其他具有等同功效或作用的结构。
在一实施例中，所述第一极片11和所述第二极片12沿竖直方向层叠设置，且所述第一极耳13和所述第二极耳14从所述外壳20的相对两侧延伸出，减小所述第一极耳13和所述第二极耳14出现接触的情况。进一步地，所述第一极片11为正极极片，所述第一极耳13为正极极耳，相应的，所述第二极片12为负极极片，所述第二极耳14为负极极耳。
优选的，所述第一极耳13和所述第二极耳14包括铝元素、镍元素、锰元素、镉元素、铜元素、铁元素、镁元素、硅元素、钛元素、锆元素、钒元素、锌元素、铅元素、硫元素、磷元素、锡元素、砷元素、铋元素、锑元素中的至少一种。
制成所述第一极片11、所述第二极片12、所述第一极耳13、所述第二极耳14和所述隔离膜的材料和过程在现有的技术中较为常见，在此，不再进行赘述。
请参阅图6，在另一实施例中，多个所述第一极片11和多个所述第二极片12还可沿竖直方向进行堆叠或者卷绕。
请参阅图7，在另一实施例中，所述第一极耳13和所述第二极耳14还可相邻设置，保持所述第一极耳13和所述第二极耳14之间存在一定的间隔避免二者之间发生接触的情况即可。
请参阅图4和图5，所述外壳20包括封装部21和密封部22，所述封装部21与所述密封部22连接，进一步地，所述密封部22由所述封装部21向外延伸形成，所述封装部21收容所述电极组件10，所述第一极耳13和所述第二极耳14从所述密封部22向外穿出，以延伸至所述外壳20的外侧，从而能够与外部结构连接。从图4所示的角度观察，所述密封部22设于所述封装部21的下端。
进一步地，所述外壳20包括聚乙烯、聚丙烯、聚酯、尼龙、聚苯醚、铝箔及铝合金箔、镁箔及镁合金箔、钛箔及钛合金箔、铜箔及铜合金箔、铁箔及铁合金箔、聚对苯二甲酸乙二醇酯、丙烯腈-丁二烯-苯乙烯共聚物、聚苯乙烯、聚碳酸酯、苯乙烯丙烯腈共聚体中的至少一种。所述外壳20采用上述材料中的至少一种制成，例如采用聚乙烯制成所述外壳20，能够减轻所述外壳20的重量，进而减小所述电芯100的整体重量。
所述封装部21包括侧壁211，进一步地，该侧壁211为所述封装部21的外侧壁211，当所述密封部22和所述封装部21连接时，所述密封部22贴附于所述封装部21的外侧壁211上，如图6所示。其中，外侧壁211中的“外”是相对于所述封装部21收容所述电极组件10的内部而进行的描述。
请再参阅图3，所述密封部22开设有槽口221，所述槽口221从所述密封部22的外周缘向所述封装部21与所述密封部22的连接处23凹陷形成。所述密封部22的外周缘为所述密封部22远离所述封装的边缘，即所述密封部22的最外侧位置。
在一实施例中，所述槽口221的边缘与所述封装部21和所述密封部22的连接处23之间的最小距离为d，d大于或者等于0.5mm。所述槽口221的边缘指从所述密封部22的外周缘向所述连接处23凹陷的最远距离的边缘，将最小距离d设置为等于或者大于0.5mm，为了避免所述密封部22和所述封装部21在连接的过程中，因所述密封部22和所述封装部21之间的距离过小而显露出所述封装部21的内部结构，使得所述电极组件10无法被封装，造成所述电芯100无法使用的情况。
所述槽口221的形状大致呈V形，可以理解的是，此处的“大致”意为看起来像，但并非为绝对的呈V形，所述槽口221在靠近所述连接处23的位置可能为圆弧过渡连接。所述密封部22上开设有多个槽口221，多个所述槽口221间隔设置，从而有效减少所述密封部22的整体面积。
请参阅图8和图9，图8为将所述密封部22在所述连接处23位置进行弯折后贴附在所述封装部21的侧壁211上的情况。因所述密封部22上设有槽口221，使得所述密封部22的面积减小，在贴附于所述封装部21上时，所述密封部22能够平整的贴附于所述侧壁211上，不会出现褶皱的情况，减小了所述电芯100的整体的体积，提升了所述密封部22的空间利用率。
请参阅图10、图11和图12，在其他实施例中，所述槽口221的形状不限于上述的大致呈V形。进一步地，所述槽口221还可呈U形、多边形、不规则弧形等，例如在图10中所示，所述密封部22上设有多个呈不同形状的槽口221。如图11所示，所述槽口221还可呈圆弧形或半圆形，且多个呈圆弧形或半圆形的槽口221等距设置。如图12所示，所述槽口221还可呈类似于梯形的形状，多个呈梯形形状的槽口221等距设置。通过设置不同形状的槽口221，使得所述密封部22的面积能够进行改变，以使得不同尺寸的电芯100均可通过此方式来进行封装，从而提升所述密封部22的空间利用率。
请参阅图13和图14，在其他实施例中，所述槽口221的数量也可根据不同的需要进行设置。例如，在图13中，所述密封部22上设置两所述槽口 221，两所述槽口221对称设置。在图14中，所述密封部22上设置三个所述槽口221，三个所述槽口221间隔设置。通过采用不同数量的所述槽口221，也可使得所述密封部22的面积能够进行改变，以使得不同尺寸的电芯100均可通过此方式来进行封装，从而提升所述密封部22的空间利用率。
可以理解的是，所述槽口221的数量设置和形状设置不限于此。
所述外壳20通过区域划分可分为所述封装部21和所述密封部22。请参阅图15，具体的，依据结构，所述外壳20包括第一封装膜24和第二封装膜25。所述第一封装膜24包括第一部分241和与所述第一部分241连接的第一边缘部242，所述第二封装膜25包括第二部分251和与所述第二部分251连接的第二边缘部252，所述第一部分241和所述第二部分251围设成所述封装部21，所述第一边缘部242和所述第二边缘部252连接形成所述密封部22。
在该实施例中，所述第一部分241为呈倒U形的第一收容腔，所述第一边缘部242从所述第一部分241靠近所述第二封装部21的端部沿水平方向且相反的两侧延伸预设长度。所述第二部分251呈平坦状，所述第二边缘部252从所述第二部分251的端部沿水平方向且相反的两侧延伸预设长度，并与所述第一边缘部242相对应。
呈平坦状的第二部分251封闭呈倒U形的第一部分241以形成所述封装部21。所述第一边缘部242和所述第二边缘部252连接形成所述密封部22。
请参阅图16，当所述外壳20采用带有金属的材料制成时，为了避免所述电芯100出现短路的情况，所述电芯100还包括绝缘片16，所述绝缘片16设于所述电极组件10和所述外壳20之间，避免所述电极组件10与所述外壳20之间接触。进一步地，所述绝缘片16为绝缘垫片。
可以理解的是，在其他实施例中，所述绝缘片16不限于此，还可替换为其他形式，例如，替换为具有绝缘功效的绝缘漆，将其喷涂在所述外壳20上，也可达到绝缘的效果。
第二实施例
请参阅图17和图18，本申请还提供另一种电芯100a，该电芯100a与第一实施例中的电芯100大致相同，区别在于，所述密封部22a从所述封装部21a的侧壁211a上向外延伸形成。沿图18所示的方向观察，所述密封部22a大致位于所述封装部21a的中部。
所述封装部21a包括第一端面212a和第二端面213a，所述第一端面212a和所述第二端面213a相对设置，且所述第一端面212a和所述第二端面213a分别与所述侧壁211a连接，所述密封部22a和所述封装部21a的连接处23a至所述第一端面212a的距离大于或者等于所述连接处23a至所述第二端面213a的距离。
使得所述连接处23a至所述第一端面212a的距离大于或者等于所述连接处23a至所述第二端面213a的距离，使得所述密封部22a在进行弯折贴附于所述封装部21a的侧壁211a上时，能够减小所述密封部22a沿所述侧壁211a延伸的距离，使得所述密封部22a能够依靠自身更好的贴附所述侧壁 211a上。
具体的，在该实施例中，所述第一封装膜24a的第一部分241a为呈倒U形的第一收容腔，所述第二封装膜25a的第二部分251a为呈U形的第二收容腔，呈倒U形的第一部分241a和呈U形的第二部分251a封闭以形成所述封装部21a。所述第一边缘部242a从所述第一部分241a靠近所述第二边缘部252a的端部沿水平方向且相反的两侧延伸预设长度，所述第二边缘部252a从所述第二部分251a靠近所述第一边缘部242a的端部沿水平方向且相反的两侧延伸预设长度，并与所述第一边缘部242a对应，所述第一边缘部242a和所述第二边缘部252a形成所述密封部22a。
第三实施例
请参阅图19，第三实施例中的电芯100b与第二实施例中的电芯100a结构大致相同，区别在于，第三实施例中的电芯100b还包括第一粘接件26，所述第一粘接件26的一端设于所述侧壁211b、所述第一端面212b或所述第二端面213b上，所述第一粘接件26的另一端设于所述密封部22b背离所述封装部21b的表面上，用于将所述密封部22b固定在所述封装部21b上。
当所述密封部22b弯折后沿所述侧壁211b延伸的长度小于所述侧壁211b的距离，则所述第一粘接件26粘接于所述侧壁211b和所述密封部22b上。
当所述密封部22b向不同的方向弯折时，所述第一粘接件26的一端则粘接于所述第一端面212b或所述第二端面213b上。
可以理解的是，当所述第一粘接件26设于第一实施例中的电芯100上时，也可适用。
通过采用所述第一粘接件26粘接所述密封部22b和所述封装部21b，避免所述密封部22b被弯折后出现回弹的情况，从而影响所述电芯100b在电池中组装。
所述第一粘接件26包括聚环氧乙烷、聚偏二氟乙烯、丁苯橡胶、偏二氟乙烯与六氟丙烯的聚合物、聚偏氟乙烯、改性聚偏氟乙烯、聚丙烯酸酯、改性聚丙烯酸酯、改性聚乙烯、改性聚二烯中等材料中的至少一种。
在本实施例中，所述第一粘接件26为胶纸。可以理解的是，在其他实施例中，所述第一粘接件26还可替换为其他具有等同功效或作用的结构。
第四实施例
请参阅图20，第四实施例中的电芯100c与第二实施例中的电芯100a结构大致相同，区别在于，第四实施例中的电芯100c还包括第二粘接件27，所述第二粘接件27设于所述侧壁211c与所述密封部22c靠近所述封装部21c的表面之间，用以将所述密封部22c固定在所述封装部21c上。
通过在所述封装部21c和所述密封部22c之间设置所述第二粘接件27，避免所述密封部22c被弯折后出现回弹的情况，从而影响所述电芯100c在电池中组装。
所述第二粘接件27包括聚环氧乙烷、聚偏二氟乙烯、丁苯橡胶、偏二氟乙烯与六氟丙烯的聚合物、聚偏氟乙烯、改性聚偏氟乙烯、聚丙烯酸酯、改 性聚丙烯酸酯、改性聚乙烯、改性聚二烯中等材料中的至少一种。
在本实施例中，所述第二粘接件27为双面胶。可以理解的是，在其他实施例中，所述第二粘接件27还可替换为同等功效或作用的结构。
第五实施例
请参阅图21，本申请的实施例还提供一种电池300，包括壳体30和如上述任一实施例中的电芯100、100a、100b、100c，所述电芯100、100a、100b、100c收容于所述壳体30内。所述电池300包括上述实施例中的任一所述电芯100、100a、100b、100c，因而具有所述电芯100、100a、100b、100c的一切有益效果，在此，不再进行赘述。
可以理解的是，在本实施例中，所述电池还包括电路板(图未示)、连接片(图未示)等结构，所述电芯100、100a、100b、100c上的极耳通过所述连接片焊接于所述电路板上。该中结构在电池领域中较为常见，在此，不再进行赘述。
所述电芯100、100a、100b、100c的极耳形成所述电池的正负极，以使得所述电池设于用电装置中能够直接使用。
第六实施例
请参阅图22，本申请的实施例还提供一种用电装置500，包括本体50和如上述实施例中的电池300，所述电池300收容于所述本体内，用于向所述本体50供电，以使得所述本体50能够获得电能从而能够使用。所述用电装置500包括上述实施例中的所述电池300，因而具有所述电池300的一切有益效果，在此，不再进行赘述。
在一实施例中，所述用电装置500具体为无线蓝牙耳机。可以理解的是，在其他实施了中，所述用电装置500还可为其他智能穿戴设备，例如运动手表、小型照明装置等。
综上所述，本申请实施例中提供的电芯100、电池300及用电装置500，通过在所述密封部22上开设槽口221，进而减小所述密封部22贴附于所述封装部21上的面积，避免所述密封部22设于所述封装部21上时出现褶皱的情况。因此，能够减小所述电芯100的体积，在使用该电芯100的结构中，能够提升空间利用率。
另外，本技术领域的普通技术人员应当认识到，以上的实施例仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本申请公开的范围之内。

Claims (11)

  1. 一种电芯，包括：
    电极组件，包括极耳；
    外壳，所述电极组件设于所述外壳内；
    其特征在于，所述外壳包括封装部和与所述封装部连接的密封部，所述密封部由所述封装部向外延伸形成，所述电极组件位于所述封装部内，所述极耳从所述密封部向外穿出；
    所述封装部包括侧壁，所述密封部上开设有槽口，所述槽口由所述密封部的外周缘向所述密封部与所述封装部的连接处凹陷形成，且所述密封部贴附于所述侧壁。
  2. 如权利要求1所述的电芯，其特征在于，所述外壳包括第一封装膜和第二封装膜；
    所述第一封装膜包括第一部分和与所述第一部分连接的第一边缘部，所述第二封装膜包括第二部分和与所述第二部分连接的第二边缘部；
    所述第一部分和所述第二部分围设成所述封装部，所述第一边缘部和所述第二边缘部连接形成所述密封部。
  3. 如权利要求2所述的电芯，其特征在于，所述第一部分凹陷形成第一收容腔，所述第一收容腔的竖直剖面呈倒U型；所述第二部分呈平坦状且封闭所述第一部分以形成所述封装部。
  4. 如权利要求2所述的电芯，其特征在于，所述第一部分凹陷形成第一收容腔，所述第一收容腔的竖直剖面呈倒U型；所述第二部分凹陷形成第二收容腔，所述第二收容腔的竖直剖面呈U型；所述第一收容腔和所述第二收容腔围设成所述封装部。
  5. 如权利要求1所述的电芯，其特征在于，所述槽口呈弧形、V形、半圆形、U形、多边形中的至少一种。
  6. 如权利要求1所述的电芯，其特征在于，所述槽口的边缘与所述封装部及所述密封部的连接处之间的最小距离大于或者等于0.5mm。
  7. 如权利要求1所述的电芯，其特征在于，所述封装部包括第一端面和与所述第一端面相对的第二端面，所述第一端面和所述第二端面分别与所述侧壁连接，所述密封部与所述封装部的连接处至所述第一端面的距离大于或等于所述连接处至所述第二端面的距离。
  8. 如权利要求7所述的电芯，其特征在于，所述电芯还包括第一粘接件，所述第一粘接件的一端设于所述侧壁、第一端面或所述第二端面，所述第一粘接件的另一端设于所述密封部背离所述封装部的表面上，用于将所述密封部固定在所述封装部上。
  9. 如权利要求1所述的电芯，其特征在于，所述电芯还包括第二粘接件，所述第二粘接件设于所述侧壁与所述密封部靠近所述封装部的表面之间，用以将所述密封部固定在所述封装部上。
  10. 一种电池，包括壳体，其特征在于，所述电池还包括如权利要求1 至9中任一项所述的电芯，所述电芯收容于所述壳体内。
  11. 一种电子装置，包括本体，其特征在于，所述电子装置还包括如权利要求10所述的电池，所述电池收容于所述本体内。
PCT/CN2021/073138 2021-01-21 2021-01-21 电芯、电池及用电装置 WO2022155855A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2021/073138 WO2022155855A1 (zh) 2021-01-21 2021-01-21 电芯、电池及用电装置
CN202180002842.9A CN113711427A (zh) 2021-01-21 2021-01-21 电芯、电池及用电装置
US18/193,049 US20230238618A1 (en) 2021-01-21 2023-03-30 Cell, battery, and electric apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/073138 WO2022155855A1 (zh) 2021-01-21 2021-01-21 电芯、电池及用电装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/193,049 Continuation US20230238618A1 (en) 2021-01-21 2023-03-30 Cell, battery, and electric apparatus

Publications (1)

Publication Number Publication Date
WO2022155855A1 true WO2022155855A1 (zh) 2022-07-28

Family

ID=78647601

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/073138 WO2022155855A1 (zh) 2021-01-21 2021-01-21 电芯、电池及用电装置

Country Status (3)

Country Link
US (1) US20230238618A1 (zh)
CN (1) CN113711427A (zh)
WO (1) WO2022155855A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110197923A (zh) * 2019-04-23 2019-09-03 广东维都利新能源有限公司 一种扣式聚合物锂离子电池及其圆形波形压边方式
CN209526141U (zh) * 2019-02-02 2019-10-22 广东微电新能源有限公司 电池装置以及电子设备
CN212209647U (zh) * 2020-06-10 2020-12-22 路华置富电子(深圳)有限公司 稳定密封的软包扣式电池
CN112490491A (zh) * 2020-11-20 2021-03-12 重庆市维都利新能源有限公司 一种新型软包装锂离子电池及其制造方法
CN212967849U (zh) * 2020-08-26 2021-04-13 曙鹏科技（深圳）有限公司 软包纽扣电池
CN213583901U (zh) * 2020-11-20 2021-06-29 重庆市维都利新能源有限公司 一种新型软包装锂离子电池

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11171375B2 (en) * 2016-03-25 2021-11-09 Enevate Corporation Stepped electrochemical cells with folded sealed portion
EP3561897A4 (en) * 2016-12-20 2020-07-15 SK Innovation Co., Ltd. POCKET TYPE SECONDARY BATTERY
CN108428809A (zh) * 2017-02-15 2018-08-21 宁德新能源科技有限公司 软包电池
KR102642969B1 (ko) * 2018-03-27 2024-03-04 에스케이온 주식회사 배터리 셀 및 그 제조 방법
CN109860445A (zh) * 2019-01-10 2019-06-07 金能电池(东莞)有限公司 一种新型的铝塑膜纽扣电池
CN112366393B (zh) * 2019-07-23 2023-10-20 宁德时代新能源科技股份有限公司 二次电池
CN211605200U (zh) * 2020-03-31 2020-09-29 兴能高科技股份有限公司 一种扣式锂二次电池壳具结构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209526141U (zh) * 2019-02-02 2019-10-22 广东微电新能源有限公司 电池装置以及电子设备
CN110197923A (zh) * 2019-04-23 2019-09-03 广东维都利新能源有限公司 一种扣式聚合物锂离子电池及其圆形波形压边方式
CN212209647U (zh) * 2020-06-10 2020-12-22 路华置富电子(深圳)有限公司 稳定密封的软包扣式电池
CN212967849U (zh) * 2020-08-26 2021-04-13 曙鹏科技（深圳）有限公司 软包纽扣电池
CN112490491A (zh) * 2020-11-20 2021-03-12 重庆市维都利新能源有限公司 一种新型软包装锂离子电池及其制造方法
CN213583901U (zh) * 2020-11-20 2021-06-29 重庆市维都利新能源有限公司 一种新型软包装锂离子电池

Also Published As

Publication number Publication date
CN113711427A (zh) 2021-11-26
US20230238618A1 (en) 2023-07-27

Similar Documents

Publication Publication Date Title
US9040190B2 (en) Battery pack
CN112510240B (zh) 二次电池和终端设备
JP2016502743A (ja) 安全性が向上した新規な構造の電池セル
WO2019080394A1 (zh) 新型扣式锂离子电池及其壳体
WO2020037535A1 (zh) 一种微型电池
JP3174762U (ja) リチウムイオン電池
CN217134623U (zh) 扣式电池
CN115133232A (zh) 电芯及用电装置
WO2022155855A1 (zh) 电芯、电池及用电装置
WO2021208128A1 (zh) 锂离子电池
TWI458156B (zh) Lithium ion battery and preparation method thereof
CN216624507U (zh) 电芯及用电装置
WO2022170998A1 (zh) 一种电池和电子设备
CN109449493A (zh) 一种可弯曲穿戴式锂离子电池
CN206422171U (zh) 包胶式可充电锂离子扣式电池
CN215418509U (zh) 一种锂离子电池结构
CN213905426U (zh) 二次电池及终端设备
CN213692110U (zh) 电极组件和电池
JP2024513029A (ja) 電池セル及び電気使用設備
JP5474654B2 (ja) バッテリパック
CN220984590U (zh) 一种电池
CN215527761U (zh) 电极片、软包电芯、电池模组、电池包及用电装置
CN211789187U (zh) 电池外壳及锂电池
CN210576032U (zh) 一种可充电的扣式电池结构
CN211238305U (zh) 一种密封壳体结构及电池

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21920257

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21920257

Country of ref document: EP

Kind code of ref document: A1