WO2024099021A1 - 电池及电子装置 - Google Patents

电池及电子装置 Download PDF

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Publication number
WO2024099021A1
WO2024099021A1 PCT/CN2023/124023 CN2023124023W WO2024099021A1 WO 2024099021 A1 WO2024099021 A1 WO 2024099021A1 CN 2023124023 W CN2023124023 W CN 2023124023W WO 2024099021 A1 WO2024099021 A1 WO 2024099021A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole
battery
shell
conductive member
electrode assembly
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2023/124023
Other languages
English (en)
French (fr)
Inventor
曹维毅
柳宁
吴华
何平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningde Amperex Technology Ltd
Original Assignee
Ningde Amperex Technology Ltd
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 Ningde Amperex Technology Ltd filed Critical Ningde Amperex Technology Ltd
Priority to EP23887713.8A priority Critical patent/EP4583215A4/en
Publication of WO2024099021A1 publication Critical patent/WO2024099021A1/zh
Priority to US19/203,497 priority patent/US20250266488A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings 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
    • 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
    • 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
    • H01M50/531—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
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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 embodiments of the present invention relate to the field of energy storage technology, and in particular to a battery and an electronic device.
  • a battery is a device that converts external energy into electrical energy and stores it inside the battery to power external devices (such as portable electronic devices) when needed.
  • external devices such as portable electronic devices
  • batteries are widely used in electronic devices such as mobile phones, tablets, and laptops.
  • a battery includes a cell, a circuit board, and a pole, wherein the pole and the circuit board are mounted on the same side of the cell, wherein an electrode assembly is provided in the cell, the electrode assembly is connected to the pole, and the pole is connected to the circuit board, so that the circuit board can control the charging and discharging of the cell.
  • the thickness of the cell is limited by the specifications of the pole, which brings inconvenience.
  • embodiments of the present invention provide a battery and an electronic device.
  • a battery includes a cell, the cell includes a shell, an electrode assembly contained in the shell, a bonding member, and a pole, the shell includes a first surface arranged along the thickness direction of the battery, the shell is provided with a first avoidance opening penetrating the first surface along the thickness direction of the battery, the pole is arranged in the first avoidance opening, the pole is connected to the electrode assembly, and the bonding member is arranged between the shell and the pole.
  • the pole can be at least partially arranged in the shell, and the pole can be connected to the outside world through the first avoidance opening, which helps to reduce the influence of the specifications of the pole on the thickness of the cell, the cell can be made thinner, and the energy density of the battery is improved.
  • the battery further includes a circuit board and a first conductive member
  • the housing includes a second surface disposed adjacent to the first surface
  • the circuit board is disposed on the second surface
  • one end of the first conductive member is connected to the pole
  • the other end of the first conductive member is connected to the circuit board.
  • the pole and the circuit board are respectively located on two surfaces of the shell, which reduces the risk of the thickness of the circuit affecting the thickness of the battery, and is beneficial to improving the energy density of the battery.
  • the pole includes a connection portion and a convex portion extending from the connection portion, the connection portion is arranged at the first avoidance opening, and an adhesive is arranged at one end of the convex portion facing the first avoidance opening, and the adhesive bonds the convex portion to the inner surface of the shell.
  • the connection portion is restricted and cannot be directly separated from the shell, which is conducive to improving the reliability of the connection between the pole and the shell.
  • connection part there is a gap between the connection part and the wall surface of the first avoidance opening, and the adhesive fills the gap to seal the first avoidance opening.
  • the adhesive can reduce the risk of short circuit between the connection part and the first avoidance opening, which is beneficial to improving the safety performance of the battery cell.
  • the adhesive fills the gap between the wall surface of the first avoidance opening and the connection part, which is beneficial to improving the sealing performance of the battery cell.
  • the thickness direction of the battery cell is taken as the first direction
  • the direction perpendicular to the second surface is taken as the second direction
  • the direction perpendicular to the first direction and the second direction is taken as the third direction.
  • one end of the pole protrudes out of the first surface.
  • the battery further comprises an insulating member, which is sleeved on the pole, and which is arranged between the first surface and the first conductive member. The insulating member is used to insulate the shell from the first conductive member.
  • an insulating member is arranged between the first conductive member and the shell, which can reduce the risk of short circuit between the first conductive member and the shell, thereby improving the safety performance of the battery cell.
  • the first conductive member is provided with a protrusion, the protrusion extends into the first avoidance opening and is connected to the pole, and the battery further comprises an insulating member, the insulating member is sleeved on the protrusion, the insulating member is arranged between the first surface and the first conductive member, and the insulating member is used to insulate the shell from the first conductive member.
  • the insulating member is arranged between the first conductive member and the shell, which can reduce the risk of short circuit between the first conductive member and the shell, and improve the safety performance of the battery cell.
  • the electrode assembly includes a first pole piece, the first pole piece includes a first current collector and a first protrusion formed by protruding from an edge of the first current collector, and the first protrusion is connected to the pole.
  • the electrode assembly further includes a second pole piece, the second pole piece includes a second current collector and a second protrusion formed by protruding from the edge of the second current collector.
  • the battery further includes a conductive sheet and a second conductive member, the conductive sheet is connected to the shell, the second protrusion is conductively connected to the shell, one end of the second conductive member is connected to the conductive sheet, and the other end of the second conductive member is connected to the circuit board.
  • the shell serves as one of the electrodes of the battery cell, and the circuit board is connected to the shell through the second conductive member and the conductive sheet.
  • the welding of the second conductive member and the shell is reduced. This reduces the risk of the shell being welded through, which is beneficial to improving the reliability of the battery.
  • the electrode assembly includes a plurality of first pole pieces, a plurality of isolation membranes and a plurality of second pole pieces, the plurality of first pole pieces, the plurality of isolation membranes and the plurality of second pole pieces are stacked along a first direction, and isolation membranes are arranged between adjacent first pole pieces and second pole pieces.
  • the shell includes a first shell plate, a middle frame and a second shell plate, and the first shell plate and the second shell plate are both connected to the middle frame to form a receiving cavity for receiving the electrode assembly.
  • a size of the battery cell is t, satisfying 1.5 mm ⁇ t ⁇ 3 mm.
  • An electronic device comprises the battery mentioned above.
  • the battery provided in the embodiments of the present application includes a battery cell
  • the battery cell includes a shell, an electrode assembly, a pole and an adhesive
  • the electrode assembly is accommodated in the shell.
  • the shell includes a first surface arranged along the thickness direction of the battery, the shell is provided with a first avoidance opening penetrating the first surface along the thickness direction of the battery, the pole is arranged in the first avoidance opening, the adhesive is arranged between the pole and the shell, and the adhesive is used to bond the pole to the shell.
  • the pole is at least partially arranged in the shell along the thickness direction of the battery, which helps to reduce the influence of the specifications of the pole on the thickness of the battery cell, and the battery cell can be made thinner, which is beneficial to improve the energy density of the battery.
  • FIG1 is a schematic diagram of the structure of a battery in one embodiment of the present application.
  • FIG2 is an exploded view of the structure of FIG1 ;
  • FIG3 is a schematic diagram of FIG1 cut along line AA;
  • FIG4 is a schematic diagram of an electrode assembly according to another embodiment of the present application.
  • FIG5 is a schematic diagram of an electrode assembly in one embodiment of the present application having a laminated structure
  • FIG6 is a schematic diagram of FIG1 cut along line BB;
  • FIG7 is a schematic diagram of another situation after FIG1 is cut along the line BB;
  • FIG8 is a schematic diagram of FIG1 cut along line CC
  • FIG9 is a schematic diagram of another situation after FIG1 is cut along the line CC;
  • FIG10 is a structural block diagram of an electronic device according to another embodiment of the present application.
  • a battery 100 provided in one embodiment of the present application includes a battery cell 200 and a circuit board 300 , and the circuit board 300 is disposed on the battery cell 200 .
  • the battery cell 200 includes a shell 210 , an electrode assembly 220 and a pole 230 .
  • the electrode assembly 220 is accommodated in the shell 210
  • the pole 230 is installed in the shell 210 .
  • the pole 230 is connected to the electrode assembly 220 , and the pole 230 is used to connect to the circuit board 300 .
  • the shell 210 can have a variety of structures as long as it can load the electrode assembly 220 and install the pole 230.
  • the shell 210 includes a first shell plate 211, a middle frame 212 and a second shell plate 213 connected in sequence, and the first shell plate 211, the middle frame 212 and the second shell plate 213 are enclosed together to form a storage space, and the electrode assembly 220 is accommodated in the storage space.
  • the second shell plate 213 and the middle frame 212 are an integral component, which can be made by die casting or stamping, and the first shell plate 211 is covered on the above-mentioned integral component to form a storage space.
  • the electrode assembly 220 includes a first electrode piece 221, a second electrode piece 222, and a separator 223.
  • the separator 223 is disposed between the first electrode piece 221 and the second electrode piece 222.
  • the separator 223 is used to reduce the risk of short circuit between the first electrode piece 221 and the second electrode piece 222.
  • the first electrode piece 221 and the second electrode piece 222 have different polarities. For example, if the first electrode piece 221 is a positive electrode piece, the second electrode piece 222 is a negative electrode piece; conversely, if the first electrode piece 221 is a negative electrode piece, the second electrode piece 222 is a positive electrode piece.
  • the structure of the electrode assembly 220 can be a winding structure or a laminated structure, which is specifically set according to needs.
  • the structure of the electrode assembly 220 is a laminated structure, in which case the number of the first pole piece 221, the isolation film 223 and the second pole piece 222 is multiple, and multiple first pole pieces 221, multiple isolation films 223 and multiple second pole pieces 222 are stacked, and an isolation film 223 is arranged between adjacent first pole pieces 221 and second pole pieces 222. Multiple first pole pieces 221 of the same polarity are connected to each other, and multiple second pole pieces 222 are connected to each other.
  • the structure of the electrode assembly 220 is a winding structure, in which case the first pole piece 221, the isolation film 223 and the second pole piece 222 are stacked and wound.
  • the thickness direction of the electrode assembly 220 can be the same as or different from the thickness direction of the battery cell 200.
  • the structure of the electrode assembly 220 is a laminated structure, and the thickness direction of the electrode assembly 220 is the same as the thickness direction of the battery cell 200.
  • the thickness direction of the battery cell 200 is the thickness direction of the battery 100.
  • the thickness direction of the battery cell 200 is defined as a first direction X. Along the first direction X, the size of the battery cell 200 is t, which satisfies 1.5 mm ⁇ t ⁇ 3 mm.
  • the first pole piece 221 includes a first current collector 2211 and a first protrusion 2212 protruding from the edge of the first current collector 2211, and the surface of the first current collector 2211 is coated with a first active material layer 2213.
  • the first protrusions 2212 of the plurality of first pole pieces 221 are connected to each other.
  • the second pole piece 222 includes a second current collector 2221 and a second protrusion 2222 protruding from the edge of the second current collector 2221, and the surface of the second current collector 2221 is coated with a second active material layer 2223.
  • the second protrusions 2222 of the plurality of second pole pieces 222 are connected to each other.
  • the plurality of first protrusions 2212 and the plurality of second protrusions 2222 are all located on the same side, so as to reduce the overall size of the electrode assembly 220 and improve the energy density of the battery cell 200.
  • the direction in which the first protrusion 2212 protrudes from the first current collector 2211 is defined as the second direction Y.
  • the first direction X is perpendicular to the second direction Y.
  • the direction perpendicular to the first direction X and the second direction Y is defined as the third direction Z.
  • the surface of the outermost first protrusion 2212 is provided with a first insulating medium 2214, and the first insulating medium 2214 is used to achieve insulation between the first protrusion 2212 and the shell 210, and the first insulating medium 2214 can also reduce the risk of burrs on the surface of the first protrusion 2212 piercing the shell 210, thereby improving the safety performance of the battery 200.
  • the surface of the outermost second protrusion 2222 is provided with a second insulating medium 2224, and the second insulating medium 2224 is used to reduce the risk of burrs on the surface of the second protrusion 2222 piercing the shell 210, thereby improving the safety performance of the battery 200.
  • the first insulating medium 2214 and the second insulating medium 2224 are both insulating tape.
  • the first insulating medium 2214 and the second insulating medium 2224 can also be other, and are not limited to the insulating tape mentioned in this embodiment.
  • the number of poles 230 can be set as needed, and can be one, two, or more. In this embodiment, the number of poles 230 is one, and the pole 230 can be connected to the first pole piece 221 or the second pole piece 222. In this case, the pole 230 serves as one of the electrodes of the battery cell 200.
  • the pole 230 is connected to the first pole piece 221. Taking the solution of the present application as an example, the second pole piece 222 is connected to the shell 210 , so that the shell 210 serves as another electrode of the battery cell 200 .
  • the shell 210 includes a first surface 2101 and a second surface 2102 arranged adjacent to the first surface 2101, the shell 210 is provided with a first avoidance opening 2103 passing through the first surface 2101 along the first direction X, and the pole 230 is arranged in the first avoidance opening 2103.
  • the battery cell 200 further includes a bonding member 240, which is disposed between the housing 210 and the pole 230, and is used to bond and fix the pole 230 in the housing 210.
  • the pole 230 includes a connecting portion 231 and a convex portion 232 extending from the connecting portion 231, the connecting portion 231 is disposed in the first avoidance opening 2103, and a bonding member 240 is disposed at one end of the convex portion 232 facing the first avoidance opening 2103, and the bonding member 240 bonds the convex portion 232 to the inner surface of the housing 210, thereby realizing the rapid installation of the pole 230 on the housing 210.
  • the pole 230 can be at least partially disposed in the housing 210, and the pole 230 can be connected to the outside through the first avoidance opening 2103, which helps to reduce the influence of the pole 230 on the thickness of the battery cell 200, and the battery cell 200 can be made thinner, thereby improving the energy density of the battery 100.
  • the size of the outer periphery of the flange 232 needs to be larger than the size of the first escape opening 2103 to reduce the flange 232 from falling directly out of the shell 210 without hindrance.
  • the adhesive 240 is a connector made of an insulating material with stickiness to reduce the risk of short circuit caused by contact between the pole 230 and the shell 210.
  • the adhesive 240 is made of PP material having maleic anhydride groups.
  • the adhesive 240 can also be other connectors such as double-sided tape.
  • the connecting portion 231 is located in the first avoidance opening 2103, and the adhesive 240 is arranged between the pole 230 and the first avoidance opening 2103, which can reduce the risk of short circuit between the connecting portion 231 and the shell 210, thereby improving the safety performance of the battery cell 200.
  • the circuit board 300 is disposed on the second surface 2102 of the housing 210, and the battery 100 further includes a first conductive member 400, one end of the first conductive member 400 is connected to the pole 230, and the other end of the first conductive member 400 is connected to the circuit board 300.
  • 230 are respectively located on two surfaces of the shell 210. Since the size of the pole 230 is not restricted, the thickness of the battery cell 200 can be designed to be smaller, which is beneficial to improving the energy density of the battery cell 200 and increasing the use range of the battery 100.
  • the battery 100 further includes an insulating member 500, which is disposed between the first surface 2101 and the first conductive member 400.
  • the insulating member 500 is used to reduce the risk of short circuit between the first conductive member 400 and the first surface 2101 of the housing 210.
  • the housing 210 is made of conductive metal. It should be understood that along the first direction X, the insulating member 500 is hollowed out above the first avoidance opening 2103 to reduce the insulating member 500 from hindering the connection between the first conductive member 400 and the pole 230.
  • the insulating member 500 has different installation methods.
  • one end of the pole 230 protrudes from the first surface 2101, and the insulating member 500 is sleeved on the pole 230.
  • the height of the pole 230 protruding from the first surface 2101 is h, and h ⁇ 0.3mm is satisfied.
  • the pole 230 is located in the first avoidance opening 2103, that is, the pole 230 does not protrude from the first surface 2101, and the first conductive member 400 is provided with a protrusion 410, which extends into the first avoidance opening 2103 and is connected to the pole 230.
  • the insulating member 500 is sleeved on the protrusion 410.
  • the size of the insulating member 500 is larger than the size of the first conductive member 400 , which is beneficial to reduce the risk of short circuit between the first conductive member 400 and the shell 210 , and improves the safety performance of the battery 100 .
  • the battery 100 includes a conductive sheet 600 and a second conductive member 700, the conductive sheet 600 is mounted on the first surface 2101, one end of the second conductive member 700 is connected to the conductive sheet 600, and the other end of the second conductive member 700 is connected to the circuit board 300.
  • the second protrusion 2222 of the second pole piece 222 is conductively connected to the housing 210.
  • the housing 210 is made of conductive metal, and the housing 210 directly serves as another electrode of the battery cell 200. Under the action of the conductive sheet 600 and the second conductive member 700, the housing 210 is electrically connected to the circuit board 300.
  • the housing 210 is made of insulating material, such as plastic.
  • the housing 210 is provided with a second escape opening (not shown) penetrating the first surface 2101, as shown in FIG. 9.
  • another pole 230 and another adhesive member 240 are installed at the second avoidance, another pole 230 is bonded to the second avoidance through another adhesive member 240, the second protrusion 2222 of the second pole piece 222 is connected to another pole 230, one end of the second conductive member 700 is connected to another pole 230, and the other end of the second conductive member 700 is connected to the circuit board 300.
  • the conductive sheet 600 can be omitted. In this way, the other electrode of the battery cell 200 is also connected to the circuit board 300.
  • the battery 100 provided in the embodiment of the present application includes a battery cell 200, and the battery cell 200 includes a shell 210, an electrode assembly 220, a pole 230 and a bonding member 240, and the electrode assembly 220 is accommodated in the shell 210.
  • the shell 210 includes a first surface 2101 arranged along the thickness direction of the battery 100, and the shell 210 is provided with a first avoidance 2103 penetrating the first surface 2101 along the first direction X, the pole 230 is arranged in the first avoidance 2103, and the bonding member 240 is arranged between the pole 230 and the shell 210, and the bonding member 240 is used to bond the pole 230 to the shell 210.
  • the pole 230 can be at least partially arranged in the shell 210, and the pole 230 can be connected to the outside through the first avoidance 2103, which helps to reduce the influence of the specifications of the pole 230 on the thickness of the battery cell 200, and the battery cell 200 can be made thinner, thereby improving the energy density of the battery 100.
  • the electronic device 900 includes but is not limited to a laptop computer, a pen-input computer, a mobile computer, an e-book player, a portable phone, a portable fax machine, a portable copier, a portable printer, a head-mounted stereo headset, a video recorder, a liquid crystal television, a portable cleaner, a portable CD player, a mini-disc, a transceiver, an electronic notepad, a calculator, a memory card, a portable recorder, a radio, a backup power supply, a motor, a car, a motorcycle, a power-assisted bicycle, a bicycle, a lighting fixture, a toy, a game console, a clock, an electric tool, a flashlight, a camera, a large household battery and a lithium

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

提供一种电池及电子装置。电池包括电芯，电芯包括壳体、电极组件、极柱以及粘结件，电极组件收容于壳体内。壳体包括沿电池的厚度方向设置的第一表面，壳体设有沿电池的厚度方向贯穿第一表面的第一避让口，极柱设于第一避让口，粘结件设于极柱与壳体之间，粘结件用于将极柱粘结于壳体。极柱可至少部分设置于壳体内，并且极柱可通过第一避让口与外界实现连接，有助于降低极柱的规格对电芯厚度的影响，电芯可制作得更薄，提高了电池的能量密度。

Description

电池及电子装置
本发明要求于2022年11月10日提交中国专利局，申请号为202211406648.X，发明名称为“一种电池及电子装置”的中国专利申请的优先权，其全部内容通过引用结合在本发明中。
技术领域
本发明实施例涉及储能技术领域，尤其是涉及一种电池及电子装置。
背景技术
电池是一种将外界的能量转化为电能并储存于其内部，以在需要的时刻对外部设备(如便携式电子设备)进行供电的装置。当前，电池广泛地运用于手机、平板、笔记本电脑等电子设备中。
一般地，电池包括电芯、电路板以及极柱，极柱和电路板安装于电芯的同一侧，其中，电芯内设有电极组件，电极组件与极柱连接，极柱与电路板连接，从而电路板可控制电芯充电和放电。然而，电芯的厚度会受到极柱的规格限制，由此带来不便。
发明内容
为了解决上述技术问题，本发明实施例提供了一种电池及电子装置。
本发明实施例解决其技术问题采用以下技术方案：
一种电池，包括电芯，电芯包括壳体、收容于壳体内的电极组件、粘结件以及极柱，壳体包括沿所述电池的厚度方向设置的第一表面，壳体设有沿所述电池的厚度方向贯穿所述第一表面的第一避让口，极柱设置于第一避让口，极柱与电极组件连接，粘结件设置于壳体与极柱之间。如此，极柱可至少部分设置于壳体内，并且极柱可通过第一避让口与外界实现连接，有助于降低极柱的规格对电芯厚度的影响，电芯可制作得更薄，提高了电池的能量密度。
可选的，电池还包括电路板以及第一导电件，壳体包括与第一表面相邻设置的第二表面，电路板设置于第二表面，第一导电件的一端连接于极柱，第一导电件的另一端连接于电路板。如此，相比于电路板设置 于第一表面的方案，极柱与电路板分别位于壳体的两个表面，降低了因电路的厚度而影响到电池的厚度的风险，有利于提高电池的能量密度。
可选地，极柱包括连接部以及自连接部延伸形成的凸沿部，连接部设于第一避让口，凸沿部朝向第一避让口的一端设有粘结件，粘结件将凸沿部粘结于壳体的内表面。由此，在凸沿部的作用下，连接部受限而不能直接脱离壳体，有利于提高极柱与壳体之间连接的可靠性。
可选地，连接部与第一避让口的壁面之间具有间隙，粘结件填充于间隙，以密封第一避让口。如此，粘结件可以降低连接部与第一避让口之间短接的风险，有利于提高电芯的安全性能，同时，粘结件填充了第一避让口的壁面与连接部之间的间隙，有利于提高电芯的密封性能。
可选地，以电芯的厚度方向为第一方向，以垂直于第二表面的方向为第二方向，以垂直于第一方向和第二方向的方向为第三方向，沿第三方向观察，极柱的一端凸出第一表面，电池还包括绝缘件，绝缘件套设于极柱，绝缘件设置于第一表面与第一导电件之间，绝缘件用于使壳体与第一导电件绝缘。如此，当壳体作为电芯的其中一个电极时，第一导电件与壳体之间设置绝缘件，可以降低第一导电件与壳体短接的风险，提高了电芯的安全性能。
可选地，第一导电件设有凸起，凸起伸入第一避让口并与极柱连接，电池还包括绝缘件，绝缘件套设于凸起，绝缘件设置于第一表面与第一导电件之间，绝缘件用于使壳体与第一导电件绝缘。当壳体作为电芯的其中一个电极时，第一导电件与壳体之间设置绝缘件，可以降低第一导电件与壳体短接的风险，提高了电芯的安全性能。
可选地，电极组件包括第一极片，第一极片包括第一集流体以及自第一集流体边缘凸出形成的第一凸出部，第一凸出部与极柱连接。
可选地，电极组件还包括第二极片，第二极片包括第二集流体以及自第二集流体边缘凸出形成的第二凸出部。电池还包括导电片以及第二导电件，导电片与壳体连接，第二凸出部与壳体导电连接，第二导电件的一端连接于导电片，第二导电件的另一端连接于电路板。如此，壳体作为电芯的其中一个电极，电路板通过第二导电件以及导电片连接于壳体，相比于第二导电件直接与壳体连接，降低了第二导电件与壳体焊接 时壳体被焊穿的风险，有利于提高电池的可靠性。
可选地，电极组件包括多个第一极片、多个隔离膜以及多个第二极片，多个第一极片、多个隔离膜以及多个第二极片沿第一方向叠置设置，相邻的第一极片与第二极片之间设置隔离膜。
可选地，壳体包括第一壳板、中框以及第二壳板，第一壳板以及第二壳板均连接于中框，以形成收容电极组件的收容腔。
可选地，沿第一方向，电芯的尺寸为t，满足1.5mm≤t≤3mm。
本发明实施例解决其技术问题还采用以下技术方案：
一种电子装置，包括上述的电池。
本发明实施例的有益效果是：本申请实施例提供的电池，包括电芯，电芯包括壳体、电极组件、极柱以及粘结件，电极组件收容于壳体内。壳体包括沿电池的厚度方向设置的第一表面，壳体设有沿电池的厚度方向贯穿第一表面的第一避让口，极柱设于第一避让口，粘结件设于极柱与壳体之间，粘结件用于将极柱粘结于壳体。如此，极柱沿着电池的厚度方向至少部分设置于壳体内，有助于降低极柱的规格对电芯厚度的影响，电芯可以制作得更薄，有利于提高电池的能量密度。
附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请其中一个实施例的电池的结构示意图；
图2是图1的结构分解图；
图3是图1沿着直线AA剖切后的示意图；
图4是本申请另一实施例的电极组件的示意图；
图5是本申请其中一个实施例的电极组件为叠片结构时的示意图；
图6是图1沿着直线BB剖切后的示意图；
图7是图1沿着直线BB剖切后的另一种情况的示意图；
图8是图1沿着直线CC剖切后的示意图；
图9是图1沿着直线CC剖切后的另一种情况的示意图；
图10是本申请另一个实施例的电子装置的结构框图；
图中：100、电池；200、电芯；300、电路板；400、第一导电件；500、绝缘件；600、导电片；700、第二导电件；900、电子装置；
210、壳体；220、电极组件；230、极柱；240、粘结件；211、第一壳板；212、中框；213、第二壳板；
221、第一极片；222、第二极片；223、隔离膜；231、连接部；232、凸沿部；2211、第一集流体；2212、第一凸出部；2213、第一活性物质层；2214、第一绝缘介质；2221、第二集流体；2222、第二凸出部；2223、第二活性物质；2224、第二绝缘介质；2101、第一表面；2102、第二表面；2103、第一避让口；410、凸起。
具体实施方式
为了便于理解本发明，下面结合附图和具体实施例，对本发明进行更详细的说明。需要说明的是，当元件被表述“固定于”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“上”、“下”、“内”、“外”、“垂直的”、“水平的”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
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发明的技术领域的技术人员通常理解的含义相同。在本发明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，不是用于限制本发明。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，下面所描述的本发明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。
如图1-2所示，本申请其中一个实施例提供的电池100，包括电芯200以及电路板300，电路板300设于电芯200。
如图2与图3所示，电芯200包括壳体210、电极组件220以及极柱230，电极组件220收容于壳体210内，极柱230安装于壳体210，并且极柱230与电极组件220连接，极柱230用于连接电路板300。
壳体210可以有多种结构，只要能实现装载电极组件220以及安装极柱230即可。在一种情况中，如图3所示，壳体210包括依次连接的第一壳板211、中框212以及第二壳板213，第一壳板211、中框212以及第二壳板213共同围合形成收纳空间，电极组件220收容于收纳空间内。另一种情况中，第二壳板213与中框212为一体式构件，可以是通过压铸或者冲压成型等工艺制得，第一壳板211盖合于上述一体式构件，从而形成收纳空间。
电极组件220包括第一极片221、第二极片222以及隔离膜223，隔离膜223设置于第一极片221与第二极片222之间，隔离膜223用于降低第一极片221与第二极片222短接的风险。第一极片221与第二极片222具有不同的极性，例如，第一极片221为正极极片，则第二极片222为负极极片；反之，若第一极片221为负极极片，则第二极片222则为正极极片。
可理解的，电极组件220的结构可以是卷绕结构，也可以是叠片结构，具体根据需要而设定。一方面，如图3所示，电极组件220的结构为叠片结构，此时第一极片221、隔离膜223以及第二极片222的数量均有多个，多个第一极片221、多个隔离膜223以及多个第二极片222叠置，相邻的第一极片221与第二极片222之间设置隔离膜223，相同极性的多个第一极片221之间相互连接，多个第二极片222之间相互连接。另一方面，如图4所示，电极组件220的结构为卷绕结构，此时第一极片221、隔离膜223以及第二极片222叠置并卷绕。应当理解的，当电极组件220采用叠片结构时，电极组件220的厚度方向可以是与电芯200的厚度方向相同或不同。在本实施例中，电极组件220的结构为叠片结构，且电极组件220的厚度方向与电芯200的厚度方向相同，电芯 200的厚度方向即是电池100的厚度方向。定义电芯200的厚度方向为第一方向X，沿着第一方向X，电芯200的尺寸为t，满足1.5mm≤t≤3mm。
请结合图5与图6，第一极片221包括第一集流体2211以及自第一集流体2211边缘凸出形成的第一凸出部2212，第一集流体2211的表面涂覆有第一活性物质层2213。多个第一极片221的第一凸出部2212相互连接。同样的，如图7和图8所示，第二极片222包括第二集流体2221以及自第二集流体2221边缘凸出形成的第二凸出部2222，第二集流体2221的表面涂覆有第二活性物质层2223。多个第二极片222的第二凸出部2222相互连接。在本实施例中，多个第一凸出部2212以及多个第二凸出部2222均位于同一侧，以便于能缩小电极组件220整体尺寸，提高电芯200的能量密度。
定义第一凸出部2212凸出第一集流体2211的方向为第二方向Y，第一方向X与第二方向Y垂直，定义垂直于第一方向X和第二方向Y的方向为第三方向Z。
应当理解的，沿着第一方向X，位于最外侧的第一凸出部2212的表面设置有第一绝缘介质2214，第一绝缘介质2214用于实现第一凸出部2212与壳体210之间的绝缘，并且第一绝缘介质2214还能降低第一凸出部2212表面的毛刺刺穿壳体210的风险，提高了电芯200的安全性能。同样的，沿着第一方向X，位于最外侧的第二凸出部2222的表面设置有第二绝缘介质2224，第二绝缘介质2224用于降低第二凸出部2222表面的毛刺刺穿壳体210的风险，提高了电芯200的安全性能。在本实施例中，第一绝缘介质2214以及第二绝缘介质2224均为绝缘胶纸。当然，第一绝缘介质2214以及第二绝缘介质2224还可以是其它，并不局限于本实施例中提及的绝缘胶纸。
极柱230的数量可以根据需要而设置，可以是一个，也可以是两个，还可以是更多。在本实施例中，极柱230的数量为一个，极柱230可以是与第一极片221或者第二极片222连接，此时极柱230作为电芯200的其中一个电极。为了便于描述，下边以极柱230与第一极片221连接 为例阐述本申请的方案，则第二极片222与壳体210连接，从而壳体210作为电芯200的另一个电极。
在一些实施例中，请结合图2与图6，壳体210包括第一表面2101以及与第一表面2101相邻设置的第二表面2102，壳体210设有沿第一方向X贯穿第一表面2101的第一避让口2103，极柱230设置于第一避让口2103。
电芯200还包括粘结件240，粘结件240设置于壳体210与极柱230之间，粘结件240用于将极柱230粘结固定于壳体210内。在本实施例中，极柱230包括连接部231以及自连接部231延伸形成的凸沿部232，连接部231设置于第一避让口2103，凸沿部232朝向第一避让口2103的一端设有粘结件240，粘结件240将凸沿部232粘结于壳体210的内表面，实现了极柱230快速安装至壳体210上。如此，极柱230可至少部分设置于壳体210内，并且极柱230可通过第一避让口2103与外界实现连接，有助于降低极柱230对电芯200厚度的影响，电芯200可制作得更薄，提高了电池100的能量密度。应当理解的，凸沿部232的外周缘的尺寸需大于第一避让口2103的尺寸，降低凸沿部232不受阻碍地直接掉落出壳体210外。
粘结件240为具有粘性的绝缘材料制成的连接件，以降低极柱230与壳体210接触而出现短接的风险，在本实施例中，粘结件240为具有马来酸酐基团的PP材料制成，当然粘结件240还可以是例如双面胶等其它连接件。
进一步地，如图6所示，凸沿部232与第一避让口2103的壁面之间具有间隙，粘结件240填充该间隙，以密封第一避让口2103，换句话说，连接部231位于第一避让口2103内，极柱230与第一避让口2103之间设置粘结件240，可以降低连接部231与壳体210短接的风险，提高了电芯200的安全性能。
在一些实施例中，电路板300设置于壳体210的第二表面2102，电池100还包括第一导电件400，第一导电件400的一端连接于极柱230，第一导电件400的另一端连接于电路板300。如此，电路板300与极柱 230分别位于壳体210的两个表面，因不受极柱230尺寸的约束，电芯200的厚度可以设计得更小，有利于提高电芯200的能量密度，增加了电池100的使用范围。
在一些实施例中，电池100还包括绝缘件500，绝缘件500设置于第一表面2101与第一导电件400之间，绝缘件500用于降低第一导电件400与壳体210的第一表面2101短接的风险，在此实施例中，壳体210采用导电金属制得。应当理解的，沿着第一方向X，绝缘件500于第一避让口2103上方处镂空，以降低绝缘件500阻碍第一导电件400与极柱230之间的连接。
应当理解的，当极柱230具有不同高度时，绝缘件500具有不同的安装方式。在一种情况中，如图6所示沿第三方向Z观察，极柱230的一端凸出第一表面2101，此时绝缘件500套设于极柱230。在此种情况中，以极柱230凸出第一表面2101的高度为h，满足h≤0.3mm。在另一种情况中，如图7所示，极柱230位于第一避让口2103内，即极柱230并未凸出第一表面2101，此时第一导电件400设有凸起410，凸起410伸入第一避让口2103并与极柱230连接。此种情况中，绝缘件500套设于凸起410。
上述两种情况中，沿第二方向Y观察，在第三方向Z上，绝缘件500的尺寸大于第一导电件400的尺寸，有利于降低第一导电件400与壳体210短接的风险，提高了电池100的安全性能。
在一些实施例中，请结合图1与图8，电池100包括导电片600以及第二导电件700，导电片600安装于第一表面2101，第二导电件700的一端连接于导电片600，第二导电件700的另一端连接于电路板300。第二极片222的第二凸出部2222与壳体210导电连接，在此实施例中，壳体210采用导电金属制得，壳体210直接充当电芯200的另一个电极，在导电片600以及第二导电件700的作用下，实现壳体210电连接于电路板300。
在另一些实施例中，壳体210采用绝缘性材料制得，例如塑料，此时壳体210设有贯穿第一表面2101的第二避让口(未标示)，如图9所 示，第二避让口处安装有另一极柱230以及另一粘结件240，另一极柱230通过另一粘结件240粘结于第二避让口，第二极片222的第二凸出部2222连接于另一极柱230，第二导电件700的一端与另一极柱230连接，第二导电件700的另一端则与电路板300连接，在此实施例中，导电片600可省略。如此，同样实现了电芯200的另一个电极与电路板300连接。
本申请实施例提供的电池100，包括电芯200，电芯200包括壳体210、电极组件220、极柱230以及粘结件240，电极组件220收容于壳体210内。壳体210包括沿电池100的厚度方向设置的第一表面2101，壳体210设有沿第一方向X贯穿第一表面2101的第一避让口2103，极柱230设于第一避让口2103，粘结件240设于极柱230与壳体210之间，粘结件240用于将极柱230粘结于壳体210。如此，极柱230可至少部分设置于壳体210内，并且极柱230可通过第一避让口2103与外界实现连接，有助于降低极柱230的规格对电芯200厚度的影响，电芯200可制作得更薄，提高了电池100的能量密度。
如图10所示，本申请另一个实施例提供的电子装置900，包括上述实施例的电池100。本申请的电子装置900没有特别限定，其可以是现有技术中已知的任何电子装置。例如，电子装置900包括但不限于笔记本电脑、笔输入型计算机、移动电脑、电子书播放器、便携式电话、便携式传真机、便携式复印机、便携式打印机、头戴式立体声耳机、录像机、液晶电视、手提式清洁器、便携CD机、迷你光盘、收发机、电子记事本、计算器、存储卡、便携式录音机、收音机、备用电源、电机、汽车、摩托车、助力自行车、自行车、照明器具、玩具、游戏机、钟表、电动工具、闪光灯、照相机、家庭用大型蓄电池和锂离子电容器等。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (12)

  1. 一种电池，包括电芯，所述电芯包括壳体以及收容于所述壳体内的电极组件，其特征在于，
    所述壳体包括沿所述电池的厚度方向设置的第一表面，所述壳体设有沿所述电池的厚度方向贯穿所述第一表面的第一避让口；
    所述电芯还包括粘结件以及极柱，所述极柱设置于所述第一避让口，所述极柱与所述电极组件连接，所述粘结件设置于所述壳体与所述极柱之间。
  2. 根据权利要求1所述的电池，其特征在于，所述电池还包括电路板以及第一导电件，所述壳体包括与所述第一表面相邻设置的第二表面，所述电路板设置于所述第二表面，所述第一导电件的一端连接于所述极柱，所述第一导电件的另一端连接于所述电路板。
  3. 根据权利要求2所述的电池，其特征在于，所述极柱包括连接部以及自所述连接部延伸形成的凸沿部，所述连接部设于所述第一避让口，所述凸沿部朝向所述第一避让口的一端设有所述粘结件，所述粘结件将所述凸沿部粘结于所述壳体的内表面。
  4. 根据权利要求3所述的电池，其特征在于，所述连接部与所述第一避让口的壁面之间具有间隙，所述粘结件填充于所述间隙，以密封所述第一避让口。
  5. 根据权利要求2所述的电池，其特征在于，以所述电芯的厚度方向为第一方向，以垂直于所述第二表面的方向为第二方向，以垂直于所述第一方向和所述第二方向的方向为第三方向，沿所述第三方向观察，所述极柱的一端凸出所述第一表面，
    所述电池还包括绝缘件，所述绝缘件套设于所述极柱，所述绝缘件设置于所述第一表面与所述第一导电件之间，所述绝缘件用于使所述壳 体与所述第一导电件绝缘。
  6. 根据权利要求2所述的电池，其特征在于，所述第一导电件设有凸起，所述凸起伸入所述第一避让口并与所述极柱连接，
    所述电池还包括绝缘件，所述绝缘件套设于所述凸起，所述绝缘件设置于所述第一表面与所述第一导电件之间，所述绝缘件用于使所述壳体与所述第一导电件绝缘。
  7. 根据权利要求1所述的电池，其特征在于，所述电极组件包括第一极片,所述第一极片包括第一集流体以及自所述第一集流体边缘凸出形成的第一凸出部，所述第一凸出部与所述极柱连接。
  8. 根据权利要求2所述的电池，其特征在于，所述电极组件还包括第二极片，所述第二极片包括第二集流体以及自所述第二集流体边缘凸出形成的第二凸出部，
    所述电池还包括导电片以及第二导电件，所述导电片与壳体连接，所述第二凸出部与所述壳体导电连接，所述第二导电件的一端连接于所述导电片，所述第二导电件的另一端连接于所述电路板。
  9. 根据权利要求1所述的电池，其特征在于，所述电极组件包括多个第一极片、多个隔离膜以及多个第二极片，多个第一极片、多个隔离膜以及多个第二极片沿第一方向叠置设置，相邻的所述第一极片与所述第二极片之间设置所述隔离膜，其中，所述第一方向为电芯的厚度方向。
  10. 根据权利要求1-9任意一项所述的电池，其特征在于，所述壳体包括第一壳板、中框以及第二壳板，所述第一壳板以及所述第二壳板均连接于所述中框，以形成收容所述电极组件的收容腔。
  11. 根据权利要求1所述的电池，其特征在于，以所述电芯的厚度方向为第一方向，沿所述第一方向，所述电芯的尺寸为t，满足1.5mm≤t≤3mm。
  12. 一种电子装置，其特征在于，包括如权利要求1-11中任意一项所述的电池。
PCT/CN2023/124023 2022-11-10 2023-10-11 电池及电子装置 Ceased WO2024099021A1 (zh)

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