WO2023065943A1 - Ensemble languette, élément, batterie et dispositif électronique - Google Patents

Ensemble languette, élément, batterie et dispositif électronique Download PDF

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Publication number
WO2023065943A1
WO2023065943A1 PCT/CN2022/120209 CN2022120209W WO2023065943A1 WO 2023065943 A1 WO2023065943 A1 WO 2023065943A1 CN 2022120209 W CN2022120209 W CN 2022120209W WO 2023065943 A1 WO2023065943 A1 WO 2023065943A1
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WO
WIPO (PCT)
Prior art keywords
tab
opening
connector
shell
insulating
Prior art date
Application number
PCT/CN2022/120209
Other languages
English (en)
Chinese (zh)
Inventor
刘洪伟
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023065943A1 publication Critical patent/WO2023065943A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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 battery field and the field of electronic equipment, and more specifically, relates to a tab assembly, a battery cell, a battery, and an electronic equipment.
  • a battery may include a cell and a cell protection plate.
  • a cell may be an energy storage element of a battery.
  • the cell protection board can be used to protect the cell so that the cell can be charged and discharged safely and stably.
  • the battery cell and the battery cell protection board can be stably connected.
  • the battery cell and the battery cell protection plate can be connected by welding; the battery cell and the battery cell protection plate can also be packaged as a whole through the packaging shell of the battery.
  • the above method for stably connecting the battery cell and the battery cell protection plate may reduce the recycling rate of the battery cell or the battery cell protection plate. For example, if one of the battery cell and the battery protection plate is scrapped, even if the other is still working normally, the battery will be scrapped as a whole.
  • the present application provides a tab assembly, a battery cell, a battery, and an electronic device, the purpose of which is to flexibly disassemble the battery cell and the battery cell protection plate.
  • a tab assembly is provided, the tab assembly is applied to a battery cell, and the battery core also includes a first pole piece and a second pole piece, and the first pole piece and the second pole piece One of the sheets is a positive pole piece, and the other is a negative pole piece.
  • the tab assembly includes a stacked first tab, a second tab and a first insulating layer, and the first insulating layer is located on the first tab. between the first lug and the second lug;
  • the first tab includes a first tab part, a second tab part and a third tab part, and the first tab part and the second tab part are located on two sides of the third tab part. end;
  • the first insulating layer includes a first opening and a second opening, the first opening is disposed opposite to the first lug portion, the second opening is disposed opposite to the second lug portion, and the first lug portion is disposed opposite to the second lug portion.
  • the projection area of the dipole on the first insulating layer is located outside the first opening and the second opening;
  • the tab assembly further includes a first connector located on a side of the second tab away from the first tab;
  • the first tab portion of the first tab is configured to be electrically connected to the first pole piece through an electrical connection piece passing through the first opening
  • the first port of the first connector is configured to be electrically connected to the second tab part of the first tab through an electrical connector passing through the second opening
  • the second port of the first connector is configured to pass through the second tab
  • the tab is electrically connected to the second pole piece.
  • the tab assembly provided by the present application is beneficial to stably electrically connect the battery cell and the circuit board, and in scenarios such as maintenance, the electrical connection between the battery and the circuit board can be relatively easily released.
  • the circuit board such as the cell protection board
  • the electronic The cell protection circuit inside the device can still continue to work.
  • the cell protection board is scrapped and the battery can still work normally, then during maintenance, by releasing the electrical connection between the battery and the cell protection board and replacing the new cell protection board, then Batteries inside electronic devices can continue to function. Therefore, the battery and the cell protection board can be disassembled flexibly, which is conducive to improving the recycling rate of the battery or the cell protection board.
  • the second tab includes a fourth tab part, a fifth tab part and a sixth tab part, and the fourth tab part and the tab part The fifth tab is located at both ends of the sixth tab;
  • the tab assembly also includes an insulating tab shell, the first tab, the second tab and the first insulating layer are accommodated in the insulating tab shell, and the first connector is arranged on Insulated lug shell;
  • the insulating lug shell includes a first shell opening, a second shell opening, a third shell opening, and a fourth shell opening, the first shell opening and the third shell opening are located at one end of the tab assembly, so The second shell opening and the fourth shell opening are located at the other end of the tab assembly;
  • the first housing opening is disposed opposite to the first opening, and the first tab part of the first tab is configured to pass through an electrical connection piece passing through the first housing opening and the first opening , electrically connected to the first pole piece;
  • the second housing opening is disposed opposite to the second opening, the first port of the first connector is configured to pass through the second housing opening and the second opening through an electrical connector, and The second tab portion of the first tab is electrically connected;
  • the opening of the third housing is opposite to the fourth lug part of the second lug, and the fourth lug part is configured to communicate with the fourth lug through an electrical connection piece penetrating through the opening of the third housing.
  • the second pole piece is electrically connected;
  • the opening of the fourth shell is opposite to the fifth lug portion of the second lug, the second port of the first connector is configured to pass through an electrical connection piece passing through the opening of the fourth shell, It is electrically connected with the fifth pole ear.
  • the tab assembly may be wrapped by an insulating tab shell, so as to improve the connection stability between the tab assembly and various devices.
  • a plurality of shell openings for exposing the first tab and the second tab can be opened on the insulating tab shell, which is beneficial to make the connection paths of the first tab and the second tab independent of each other.
  • the first insulating layer further includes a third opening and a fourth opening, the third opening and the fourth tab portion are oppositely disposed, and the The fourth opening is disposed opposite to the fifth tab, the projected area of the first tab on the first insulating layer is located outside the third opening and the fourth opening, and the third opening The fourth opening is disposed opposite to the third housing opening, and the fourth opening is disposed opposite to the fourth housing opening.
  • An opening for exposing the second tab is provided on the first insulating layer, which is beneficial to improving the symmetry of the tab assembly and improving the flexibility of the electrical connection between the tab assembly and the pole piece.
  • an opening for exposing the first tab and an opening for exposing the second tab are provided on the first insulating layer, and from each side of the first insulating layer, both the first tab and the pole piece can be realized.
  • the electrical connection between/or the circuit board can also realize the electrical connection between the second tab and the pole piece and/or the circuit board, which is beneficial to improve the processing convenience of the tab assembly.
  • the second tab includes a fourth tab part, a fifth tab part and a sixth tab part, and the fourth tab part and the tab part The fifth tab is located at both ends of the sixth tab;
  • the tab assembly further includes a third tab and a second insulating layer, the second tab is located between the first tab and the third tab, and the second insulating layer is located between the first tab and the third tab. between the second lug and the third lug;
  • the second insulating layer includes a fifth opening, a sixth opening, a seventh opening, and an eighth opening, and the projected area of the third tab on the second insulating layer is located at the fifth opening, the first opening, and the second opening.
  • the seventh opening and the eighth opening In addition to the six openings, the seventh opening and the eighth opening,
  • the fifth opening is disposed opposite to the first opening, and the first tab part of the first tab is configured to pass through the first opening and the fifth opening through an electrical connection piece, and The first pole piece is electrically connected;
  • the sixth opening is disposed opposite to the second opening, and the first port of the first connector is configured to pass through the second opening and the sixth opening through an electrical connection piece, and to communicate with the second opening.
  • the second tab portion of the first tab is electrically connected;
  • the seventh opening is opposite to the fourth tab, and the fourth tab of the second tab is configured to communicate with the second tab through an electrical connection piece passing through the seventh opening. Electrode electrical connection;
  • the eighth opening is opposite to the fifth tab, and the second port of the second connector is configured to communicate with the second tab through an electrical connection piece passing through the eighth opening.
  • the fifth pole tab is electrically connected.
  • the tab assembly may include three tabs corresponding to the three electrodes;
  • the openings of the tabs and the connection paths of the three tabs of the tab assembly may be independent of each other. Therefore, the tab assembly provided by the present application can be beneficial to realize more accurate monitoring of the battery cell.
  • the second insulating layer and the third tab are accommodated in an insulating tab shell of the tab assembly, and the third tab includes a seventh tab, an eighth tab, and a ninth tab, the seventh tab and the eighth tab are located at both ends of the ninth tab;
  • the insulating lug shell includes a fifth shell opening and a sixth shell opening, the fifth shell opening is disposed opposite to the seventh lug portion, and the sixth shell opening is disposed opposite to the eighth lug portion , the projection area of the first tab and the second tab on the insulating tab shell is located outside the fifth shell opening and the sixth shell opening,
  • the seventh tab portion of the third tab is configured to be electrically connected to the electrolyte of the battery cell through an electrical connection piece penetrating through the opening of the fifth casing;
  • the eighth lug portion of the third lug is configured to be electrically connected to the third port of the first connector through an electrical connection piece penetrating through the opening of the sixth housing.
  • the tab assembly may be wrapped by an insulating tab shell, so as to improve the connection stability between the tab assembly and various devices.
  • a plurality of housing openings for exposing the first tab, the second tab, and the third tab can be opened on the insulating tab shell, which is beneficial to make the first tab, the second tab, and the third tab
  • the connecting pathways of the ear can be independent of each other.
  • an electric core including the tab assembly described in any one of the implementation manners in the first aspect above.
  • the battery cell further includes a first pole connector, a first end of the first pole connector is electrically connected to the first pole piece, so The second end of the first pole connecting piece protrudes away from the first pole piece, and is folded on one side of the first pole piece, and the side of the tab assembly close to the first pole piece One end is located in the folding gap formed by the first pole connector, and the tab assembly is electrically connected to the second end of the first pole connector.
  • the folding gap of the first pole connector can limit the position of the tab assembly, which is beneficial to improve the connection stability between the first pole connector and the tab assembly.
  • the battery cell further includes a large current breaking device, and the large current breaking device is electrically connected between the first pole connector and the tab assembly between.
  • a battery including the battery cell described in any one of the implementation manners of the second aspect above, and a battery cell protection plate, the battery cell protection plate is provided with a second connector, The second connector is electrically connected with the first connector.
  • an electronic device which is characterized by comprising the battery described in any one of the implementation manners in the third aspect above.
  • an electronic device which is characterized in that it includes a battery and a cell protection plate, the battery includes a cell, the cell includes a first tab and a second tab, and the first pole
  • the ear includes a first connector
  • the second tab includes a second connector
  • the cell protection plate is provided with a third connector and a fourth connector
  • the first connector, the second connection Connectors are respectively used for electrical connection with the third connector and the fourth connector.
  • the cell protection board is separated from the battery, and a connector is provided on the tab of the battery, so that the connector on the tab can be electrically connected to the connector on the cell protection board stably, and in scenarios such as maintenance, the battery and the cell
  • the electrical connection relationship between the protection boards can be released relatively easily. In some embodiments, if the battery is discarded, the cell protection board can still work normally, and the electrical connection between the battery and the cell protection board is released during maintenance, and a new battery is replaced, the electronic device will The cell protection board can still continue to work.
  • the battery and the cell protection board can be disassembled flexibly, which is conducive to improving the recycling rate of the battery or the cell protection board.
  • the battery includes at least two tabs, and the two tabs can correspond to the positive pole and the negative pole respectively, which is beneficial to flexibly confirm the scrapped electrodes of the cell protection board.
  • an electronic device including a battery, a circuit board, and a cell protection plate
  • the battery includes a cell
  • the cell includes a first tab and a second tab
  • the first tab It includes a first connector
  • the second tab includes a second connector
  • the circuit board is provided with a third connector and a fourth connector
  • the first connector and the second connector are respectively used
  • the cell protection board is electrically connected to the battery through the circuit board.
  • the cell protection board is separated from the battery, and a connector is provided on the tab of the battery, so that the connector on the tab can be electrically connected to the connector on the circuit board stably, so that the battery and the cell protection board can be electrically connected through the circuit board . Therefore, in scenarios such as maintenance, the electrical connection relationship between the battery and the cell protection board can be released relatively easily. In some embodiments, if the battery is discarded, the battery cell protection board can still work normally, then by releasing the electrical connection between the battery and the circuit board during maintenance, and replacing a new battery, the battery cells in the electronic device The protection board can still continue to work.
  • the battery can still work normally, then by releasing the electrical connection between the circuit board and the cell protection board during maintenance, and replacing the new cell protection board, Then the battery in the electronic device can still continue to work. Therefore, the battery and the cell protection board can be disassembled flexibly, which is conducive to improving the recycling rate of the battery or the cell protection board.
  • the battery further includes a third tab, the third tab also includes a fifth connector, and the cell protection A sixth connector is arranged on the board, and the fifth connector is used for connecting with the sixth connector.
  • the battery includes three tabs, and the three tabs may correspond to the positive pole, the negative pole and the reference electrode of the battery respectively, or the three tabs may respectively correspond to the first positive pole, the second positive pole and the negative pole, or the three tabs may respectively Corresponding to the first negative pole, the second negative pole and the positive pole, it is beneficial to realize more accurate monitoring of the battery cell.
  • Fig. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • Fig. 2 is a schematic structural diagram of a battery cell provided by an embodiment of the present application.
  • Fig. 3 is a schematic structural diagram of a tab assembly provided by an embodiment of the present application.
  • Fig. 4 is a cross-sectional view of a tab assembly provided by an embodiment of the present application.
  • Fig. 5 is a schematic structural diagram of a first tab provided by an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of a first insulating layer provided by an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of a second tab provided in an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of an electrical connection between a tab assembly and a pole piece provided by an embodiment of the present application.
  • Fig. 9 is a schematic structural diagram of an electrical connection between a tab assembly and a pole piece provided by an embodiment of the present application.
  • Fig. 10 is a schematic structural diagram of an electrical connection between a tab assembly and a first connector provided by an embodiment of the present application.
  • Fig. 11 is a schematic structural diagram of an electrical connection between a battery cell and a circuit board provided in an embodiment of the present application.
  • Fig. 12 is a schematic structural diagram of another tab assembly provided by an embodiment of the present application.
  • Fig. 13 is a cross-sectional view of another tab assembly provided by an embodiment of the present application.
  • Fig. 14 is a schematic structural diagram of another first tab provided by an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of another first insulating layer provided by an embodiment of the present application.
  • Fig. 16 is a schematic structural diagram of another second tab provided by an embodiment of the present application.
  • Fig. 17 is a schematic structural diagram of a second insulating layer provided by an embodiment of the present application.
  • Fig. 18 is a schematic structural diagram of a third tab provided by an embodiment of the present application.
  • Fig. 19 is a schematic structural diagram of another tab assembly and the electrical connection between the pole piece provided by the embodiment of the present application.
  • Fig. 20 is a schematic structural diagram of another tab assembly provided in an embodiment of the present application and electrically connected to a first connector.
  • Fig. 21 is a schematic structural diagram of another electrical connection between a battery cell and a circuit board according to an embodiment of the present application.
  • Fig. 22 is a schematic structural diagram of a tab provided by an embodiment of the present application.
  • Fig. 23 is a cross-sectional view of a tab provided by an embodiment of the present application.
  • Fig. 24 is a schematic structural diagram of a conductive layer provided by an embodiment of the present application.
  • Fig. 25 is a schematic structural diagram of an electrical connection between a tab and a pole piece provided by an embodiment of the present application.
  • Fig. 26 is a schematic structural diagram of an electrical connection between a battery cell and a circuit board provided in an embodiment of the present application.
  • Fig. 27 is a schematic structural diagram of an electrical connection between a tab and a pole piece provided by an embodiment of the present application.
  • Fig. 28 is a schematic structural diagram of an electrical connection between a battery cell and a circuit board provided by an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of an electronic device 100 provided by an embodiment of the present application.
  • the electronic device 100 can be, for example, a terminal consumer product or a 3C electronic product (computer, communication, consumer electronics), such as a mobile phone, a mobile power supply, a portable computer, a tablet computer, an electronic reader, etc. , notebook computers, digital cameras, wearable devices, vehicle terminals, headsets and other equipment.
  • the electronic device 100 may also be a mobile device, for example.
  • the mobile device may be, for example, a vehicle, an electric skateboard, an electric bicycle, and the like.
  • the embodiment shown in FIG. 1 is described by taking the electronic device 100 as a mobile phone as an example.
  • the electronic device 100 may include a casing 10 , a display screen 20 , a battery cell 310 and a circuit board 320 .
  • the casing 10 may include a frame 12 and a rear cover 11 .
  • the bezel 12 may be located between the display screen 20 and the rear cover 11 .
  • the frame 12 can surround the periphery of the display screen 20 and surround the periphery of the rear cover 11 .
  • the cavity formed by the display screen 20 , the frame 12 , and the rear cover 11 can be used to place the electric core 310 and the circuit board 320 .
  • the battery cell 310 may be electrically connected to the circuit board 320 .
  • the battery cell 310 can supply power to the electronic devices in the electronic device 100 through the circuit board 320 .
  • the cell 310 may be, for example, a lithium-ion secondary cell, a sodium-ion secondary cell, a potassium-ion secondary cell, a magnesium-ion secondary cell, a zinc-ion secondary cell, an aluminum-ion secondary cell, and the like.
  • a cell protection circuit may be provided on the circuit board 320 .
  • the circuit board 320 may be, for example, a cell protection board.
  • the cell protection plate and the cell 310 can be electrically connected to form the battery 30 .
  • the cavity of the electronic device 100 for placing the battery 30 may be called a battery compartment.
  • the circuit board 320 may be electrically connected to the cell protection circuit in the electronic device 100 , and the cell protection circuit may be disposed on other circuit boards in the electronic device 100 except the circuit board 320 .
  • the battery 30 may include a cell 310, and the battery 30 and the circuit board 320 may be two independent components.
  • the cell protection circuit can be used to protect the cell 310 so that the charging state or discharging state of the cell 310 can be relatively safe.
  • the cell protection circuit can, for example, perform overcharge protection, over-discharge protection, over-current protection, and over-temperature protection on the cell 310 .
  • the cell protection circuit may include, for example, a charging circuit, a discharging circuit, a cell monitoring circuit, a cell protection circuit, and the like.
  • the electronic device 100 may also include a power management unit (power management unit, PMU).
  • the power management component can be used to control the charge and discharge state of the battery cell 310 .
  • the power management element may be electrically connected with the cell protection circuit in the electronic device 100 .
  • the power management component and the cell protection circuit can be set on the same or different circuit boards.
  • the power management component can monitor the status information of the battery cell 310 such as the charging current, the discharging current, and the voltage difference between positive and negative poles in real time through the battery cell protection circuit.
  • the power management component can also roughly estimate other status information of the battery cell 310, such as the current charging speed, remaining charging time, the percentage of the current power of the battery cell 310 relative to the battery capacity, Cell temperature, current DC resistance, etc.
  • the power management component can also adjust the charge state or discharge state of the cell 310 through one or more of the charge circuit, discharge circuit, cell monitoring circuit, and cell protection circuit of the cell protection board.
  • FIG. 2 is a schematic structural diagram of a battery cell 310 provided by an embodiment of the present application.
  • the battery cell 310 may include a positive pole piece 301 , a negative pole piece 302 , an electrolyte 303 , a separator 304 , and a battery case 306 .
  • the positive pole piece 301 and the negative pole piece 302 can deintercalate metal ions (such as lithium ions) to realize energy storage and release.
  • the positive pole piece 301 and the negative pole piece 302 are the main energy storage parts of the battery cell 310 , which can reflect the energy density, cycle performance and safety performance of the battery cell 310 .
  • the electrolyte solution 303 may be a transport carrier of metal ions.
  • the separator 304 is permeable to metal ions, but the separator 304 itself is non-conductive, so that the separator 304 can separate the positive pole piece 301 and the negative pole piece 302 to prevent a short circuit between the positive pole piece 301 and the negative pole piece 302.
  • the positive electrode sheet 301 may include a positive electrode collector and a positive electrode material disposed on the positive electrode collector.
  • Positive electrode materials include but are not limited to lithium composite metal oxides (such as nickel-cobalt lithium manganate, etc.), polyanionic lithium compounds LiMx(PO4)y (M is Ni, Co, Mn, Fe, Ti, V, 0 ⁇ x ⁇ 5, 0 ⁇ y ⁇ 5), etc.
  • the negative electrode sheet 302 may include a negative electrode collector and a negative electrode material disposed on the negative electrode collector.
  • Negative electrode materials include but are not limited to at least one of the following: lithium metal, lithium alloy, lithium titanate, natural graphite, artificial graphite, MCMB, amorphous carbon, carbon fiber, carbon nanotube, hard carbon, soft carbon, graphene, graphite oxide alkenes, silicon, silicon-carbon compounds, silicon-oxygen compounds, and silicon-metal compounds.
  • the performance of the diaphragm 304 itself should be conducive to the good charge and discharge performance of the battery cell 310 .
  • the separator 304 in order to stably and reliably separate the positive electrode piece 301 from the negative electrode piece 302, the separator 304 should have certain strength and ductility to avoid being punctured, that is, the separator 304 should have certain resistance to mechanical abuse.
  • the battery cell 310 itself may generate heat.
  • the diaphragm 304 should also have relatively high stability, that is, the diaphragm 304 should have certain heat resistance or heat abuse resistance.
  • Membrane 304 may include a membrane substrate.
  • the diaphragm substrate may be a porous insulating material.
  • the pores on the diaphragm substrate can pass through metal ions (the pores on the diaphragm substrate can be the transmission channels of metal ions).
  • the separator substrate may include, for example, polyethylene (polyethylene, PE), polypropylene (polypropylene, PP) and the like.
  • the diaphragm 304 may also include a diaphragm coating.
  • the diaphragm coating can be attached to one side or both sides of the diaphragm substrate, so as to facilitate the properties of the diaphragm 304 such as high ductility, high membrane rupture temperature, and low cell closure temperature.
  • the membrane coating can also have other properties, such as relatively high adhesion and the like.
  • the membrane coating may include organic coatings, inorganic coatings and/or organic-inorganic composite coatings. Inorganic coatings may include ceramic coatings.
  • the ceramic coating may include at least one of the following: aluminum oxide, silicon oxide, titanium oxide, zirconium oxide, zinc oxide, barium oxide, magnesium oxide, beryllium oxide, calcium oxide, thorium oxide, aluminum nitride, titanium nitride, boehm Stone, apatite, aluminum hydroxide, magnesium hydroxide, barium sulfate, boron nitride, silicon carbide, silicon nitride, cubic boron nitride, hexagonal boron nitride, graphite, graphene, mesoporous molecular sieve (MCM-41 , SBA-15) etc.
  • the organic coating may include at least one of the following: polyvinylidene fluoride coating, vinylidene fluoride-hexafluoropropylene copolymer coating, polystyrene coating, aramid fiber coating, polyacrylate or its modified coating layer, polyester coating, polyarylate coating, polyacrylonitrile coating, aramid coating, polyimide coating, polyethersulfone coating, polysulfone coating, polyetherketone coating, Polyetherimide coating, polybenzimidazole.
  • the organic-inorganic composite coating can be prepared by mixing the above-mentioned inorganic coating with an organic coating.
  • the cell casing 306 can be a hard cell casing or a soft cell casing.
  • the cavity formed by the battery casing 306 can be used to accommodate the positive pole piece 301 , the negative pole piece 302 , the electrolyte 303 , the diaphragm 304 and the like.
  • the battery cell 310 may also include a positive electrode connector (not shown in FIG. 2 ) and a negative electrode connector 305 .
  • the positive pole piece 301 can be electrically connected with the positive connecting piece.
  • the negative electrode tab 302 may be electrically connected to the negative electrode connector 305 .
  • the positive connecting piece and the negative connecting piece 305 can be accommodated in the battery case 306 .
  • the positive connection part may be electrically connected to the positive tab
  • the negative connection part may be electrically connected to the negative tab.
  • the positive pole lug and the negative pole lug can be two independent components, and the positional relationship between them can be arbitrary.
  • the positive electrode tab and the negative electrode tab can be fixed to the circuit board, and the circuit board can be, for example, a cell protection plate.
  • the cell protection plate can be electrically connected to the positive tab and the negative tab respectively to protect the cell. Since the connection relationship between the cell protection plate and the cell is difficult to be destroyed, if one of the cell protection plate and the cell is damaged, the other will also be scrapped. If the connection relationship between the positive tab and the cell protection plate, and the connection relationship between the negative tab and the cell protection plate are changed arbitrarily, it may cause the cell to fail to be electrically connected to the cell protection plate stably.
  • the embodiment of the present application provides a tab assembly, which is beneficial to realize a stable connection between the tab assembly and the circuit board. In scenarios such as maintenance, the connection relationship between the tab assembly and the circuit board can be relatively easily released. Therefore It is conducive to maintaining or improving the connection stability of the battery cell and the circuit board, and is also conducive to improving the recycling rate of the battery cell or the battery cell protection board.
  • FIG. 3 is a schematic structural diagram of a tab assembly 330 provided by an embodiment of the present application.
  • the tab assembly 330 may be a part of the electric core shown in FIG. 1 and FIG. 2 .
  • the first end of the tab assembly 330 may be located in the cell casing 306 shown in FIG. 2 .
  • the first end of the tab assembly 330 can be electrically connected to the first pole piece of the battery cell 310 through the first pole connector, and the first end of the tab assembly 330 can also be connected to the second pole piece of the battery cell 310 through the second pole connector.
  • the pole pieces are electrically connected, wherein one of the first pole piece and the second pole piece is the positive pole piece 301 shown in FIG. 2 , and the other is the negative pole piece 302 shown in FIG. 2 .
  • the first pole connector can be a positive pole connector
  • the second pole connector can be the negative pole connector 305 shown in Figure 2
  • the first pole connector may be the negative pole connector 305
  • the second pole connector may be the positive pole connector.
  • the second end of the tab assembly 330 may be located outside the cell housing 306 .
  • the second end of the tab assembly 330 may be electrically connected to the circuit board 320 shown in FIG. 1 .
  • the tab assembly 330 can be divided into a first part 3301 , a second part 3302 and a third part 3303 , for example.
  • the first part 3301 may be a part of the tab assembly 330 close to the pole piece (the pole piece includes the positive pole piece 301 and/or the negative pole piece 302 shown in FIG. 2 , hereinafter referred to as the pole piece).
  • the first portion 3301 may be located within the cell housing 306 shown in FIG. 2 .
  • the first part 3301 can be connected with the positive connection part and the negative connection part 305 of the battery cell 310 .
  • the first part 3301 may correspond to the first end of the aforementioned tab assembly 330 .
  • the second part 3302 may be a part of the tab assembly 330 close to the circuit board 320 .
  • the second portion 3302 may be located outside the cell housing 306 shown in FIG. 2 .
  • the second part 3302 can be connected to the circuit board 320 .
  • the second part 3302 may correspond to the second end of the aforementioned tab assembly 330 .
  • the third part 3303 may be connected between the first part 3301 and the second part 3302 . That is to say, the first part 3301 and the second part 3302 can be respectively located at two ends of the third part 3303 .
  • the third part 3303 can be packaged together with the battery case 306 shown in FIG. 2 .
  • the outer periphery of the third portion 3303 may be provided with tab glue 340 around.
  • the third part 3303 can be fixed to the battery case 306 through the tab glue 340 .
  • the tab assembly 330 may include a first tab 331 , a second tab 332 and a first insulating layer 333 arranged in layers.
  • One of the first tab 331 and the second tab 332 may be the positive tab 301 shown in FIG. 2 , and the other may be the negative tab 302 shown in FIG. 2 .
  • the first insulating layer 333 may be located between the first tab 331 and the second tab 332 .
  • the first insulating layer 333 can separate the first tab 331 and the second tab 332 , so as to avoid short circuit between the first tab 331 and the second tab 332 .
  • the outer periphery of the first insulating layer 333 may protrude from the first tab 331 and the second tab 332 . That is to say, the width of the first insulating layer 333 may be greater than the width of the first tab 331 , and the width of the first insulating layer 333 may be greater than the width of the second tab 332 .
  • the dimension of the tab assembly 330 in the thickness direction may be smaller than the dimension of the tab assembly 330 in the length direction, and smaller than the dimension of the tab assembly 330 in the broadband direction.
  • the dimension of the tab assembly 330 in the width direction may be smaller than the dimension of the tab assembly 330 in the length direction.
  • the length direction, the broadband direction, and the thickness direction are orthogonal to each other.
  • the outer periphery of the first insulating layer 333 exceeds the edge of the first tab 331 and beyond the edge of the second tab 332 , which is beneficial to reduce the possibility of a short circuit between the first tab 331 and the second tab 332 .
  • the tab assembly 330 may further include an insulating tab housing 334 .
  • the insulating tab shell 334 may be wrapped around the outer periphery of the laminated structure formed by the first tab 331 , the second tab 332 and the first insulating layer 333 . That is to say, the first tab 331 , the second tab 332 and the first insulating layer 333 can all be accommodated in the insulating tab shell 334 .
  • the insulating tab shell 334 may include a first shell opening 3341 and a second shell opening 3342 .
  • the first shell opening 3341 and the second shell opening 3342 may be windows of the insulating tab shell 334 for exposing the first tab 331 .
  • the first tab 331 can be observed through the first housing opening 3341 and the second housing opening 3342 . That is to say, the first shell opening 3341 and the second shell opening 3342 may be located in the projection area of the first tab 331 on the insulating tab shell 334 .
  • the first shell opening 3341 may be located at an end of the insulating lug shell 334 close to the pole piece.
  • the first shell opening 3341 may be disposed on the first portion 3301 of the tab assembly 330 , for example.
  • the part of the first tab 331 exposed from the first shell opening 3341 may be the first connecting portion 3311 of the first tab 331 .
  • the second housing opening 3342 may be located at an end of the insulating tab housing 334 close to the circuit board 320 .
  • the second shell opening 3342 can be disposed on the second portion 3302 of the tab assembly 330 , for example.
  • the part of the first tab 331 exposed from the opening 3342 of the second housing may be the second connecting portion 3312 of the first tab 331 .
  • the insulating lug housing 334 may further include a third housing opening 3343 and a fourth housing opening 3344 .
  • the third shell opening 3343 and the fourth shell opening 3344 may be windows of the insulating tab shell 334 for exposing the second tab 332 .
  • the second tab 332 can be observed through the third housing opening 3343 and the fourth housing opening 3344 . That is to say, the third shell opening 3343 and the fourth shell opening 3344 may be located in the projection area of the second tab 332 on the insulating tab shell 334 .
  • the third shell opening 3343 may be located at an end of the insulating lug shell 334 close to the pole piece.
  • the third housing opening 3343 may be disposed on the first portion 3301 of the tab assembly 330 , for example.
  • the part of the second tab 332 exposed from the opening 3343 of the third housing may be the first connecting portion 3321 of the second tab 332 .
  • the fourth housing opening 3344 may be located at an end of the insulating tab housing 334 close to the circuit board 320 .
  • the fourth shell opening 3344 can be disposed on the second portion 3302 of the tab assembly 330 , for example.
  • the part of the second tab 332 exposed from the fourth housing opening 3344 may be the second connecting portion 3322 of the second tab 332 .
  • the first shell opening 3341 , the second shell opening 3342 , the third shell opening 3343 , and the fourth shell opening 3344 may be located on the same side of the tab assembly 330 .
  • the first shell opening 3341 , the second shell opening 3342 , the third shell opening 3343 , and the fourth shell opening 3344 may be located on a side of the second tab 332 away from the first tab 331 .
  • the first shell opening 3341 , the second shell opening 3342 , the third shell opening 3343 , and the fourth shell opening 3344 may be located on a side of the first tab 331 away from the second tab 332 .
  • the insulating lug shell 334 may have a plurality of The shell is opened so that both sides of the tab assembly 330 can be connected with the pole piece and/or the circuit board 320 .
  • the first embodiment described above will be taken as an example for description.
  • FIG. 5 shows a schematic structural diagram of a first tab 331 provided by an embodiment of the present application.
  • the dotted line in FIG. 5 shows the outline of the insulating tab housing 334 .
  • the first tab 331 may include a tab part 3313 , a tab part 3314 and a tab part 3315 .
  • the tab part 3313 may be a part of the first tab 331 close to the pole piece.
  • the tab part 3313 can be located in the cell casing 306 shown in FIG. 2 .
  • the tab part 3313 may correspond to the first part 3301 of the tab assembly 330 shown in FIG. 3 .
  • the first shell opening 3341 of the insulating tab shell 334 may be located in the projection area of the tab portion 3313 on the insulating tab shell 334 .
  • the projection area of the tab portion 3313 on the insulating tab housing 334 may be located outside the third housing opening 3343 of the insulating tab housing 334 .
  • the tab part 3314 may be a part of the first tab 331 close to the circuit board 320 .
  • the tab portion 3314 may be located outside the cell housing 306 shown in FIG. 2 .
  • the tab portion 3314 may correspond to the second portion 3302 of the tab assembly 330 shown in FIG. 3 .
  • the second shell opening 3342 of the insulating tab shell 334 may be located within the projection area of the tab portion 3314 on the insulating tab shell 334 .
  • the projection area of the tab portion 3314 on the insulating tab housing 334 may be located outside the fourth housing opening 3344 of the insulating tab housing 334 .
  • the tab part 3315 may be connected between the tab part 3313 and the tab part 3314 .
  • the tab portion 3315 may correspond to the third portion 3303 of the tab assembly 330 . That is to say, the tab part 3313 and the tab part 3314 may be located at two ends of the tab part 3315 .
  • FIG. 6 shows a schematic structural diagram of a first insulating layer 333 provided by an embodiment of the present application.
  • the first insulating layer 333 may include a first insulating part 3335 , a second insulating part 3336 and a third insulating part 3337 .
  • the first insulating part 3335 may be a part of the first insulating layer 333 close to the pole piece.
  • the first insulating part 3335 may be located in the cell casing 306 shown in FIG. 2 .
  • the first insulating part 3335 may correspond to the first part 3301 of the tab assembly 330 shown in FIG. 3 .
  • the second insulating part 3336 may be a part of the first insulating layer 333 close to the circuit board 320 .
  • the second insulating part 3336 may be located outside the cell casing 306 shown in FIG. 2 .
  • the second insulating part 3336 may correspond to the second part 3302 of the tab assembly 330 shown in FIG. 3 .
  • the third insulating part 3337 may be connected between the first insulating part 3335 and the second insulating part 3336 .
  • the third insulating part 3337 may correspond to the third part 3303 of the tab assembly 330 shown in FIG. 3 . That is, the first insulating part 3335 and the second insulating part 3336 may be located at both ends of the third insulating part 3337 .
  • the first insulating layer 333 may include a first opening 3331 and a second opening 3332 .
  • the first opening 3331 and the second opening 3332 may be windows of the first insulating layer 333 for exposing the first tab 331 .
  • the first opening 3331 may be located at an end of the first insulating layer 333 close to the pole piece.
  • the first opening 3331 may be disposed on the first insulating part 3335 .
  • the second opening 3332 may be located at an end of the first insulating layer 333 close to the circuit board 320 .
  • the second opening 3332 may be disposed on the second insulating portion 3336 .
  • the first opening 3331 of the first insulating layer 333 can be arranged opposite to the first shell opening 3341 of the insulating lug shell 334, and the second opening 3332 of the first insulating layer 333 can be arranged opposite to the first shell opening 3341 of the insulating lug shell 334.
  • the second shell opening 3342 of the insulating tab shell 334 is oppositely disposed.
  • the first shell opening 3341 of the insulating tab shell 334 is located on the side of the tab assembly 300 away from the first tab 331
  • the second shell opening 3342 of the insulating tab shell 334 is located on the side of the tab assembly 300 The side away from the first tab 331 .
  • the first tab 331 can expose the insulating tab from the side of the insulating tab housing 334 away from the first tab 331 Housing 334 .
  • the projected area of the first connecting portion 3311 of the first tab 331 in the insulating tab housing 334 corresponds to the first housing opening 3341 , or is located in the first housing opening 3341 .
  • the first connecting portion 3311 of the first tab 331 corresponds to the first opening 3331 in the projected area of the first insulating layer 333 , or is located in the first opening 3331 .
  • the projected area of the second connecting portion 3312 of the first tab 331 in the insulating tab housing 334 corresponds to the second housing opening 3341 , or is located in the second housing opening 3341 .
  • the second connection portion 3312 of the first tab 331 corresponds to the second opening 3331 in the projected area of the first insulating layer 333 , or is located in the second opening 3331 .
  • the outline of the third insulating portion 3337 of the first insulating layer 333 may correspond to the outline of the tab portion 3315 of the first tab 331 .
  • the end surface area of the tab portion 3315 may be slightly smaller than the end surface area of the third insulating portion 3337 .
  • the end surface may be perpendicular to the thickness direction of the tab assembly 330 .
  • the width of the lug portion 3315 may be slightly smaller than the width of the third insulating portion 3337 .
  • FIG. 7 shows a schematic structural diagram of a second tab 332 provided by the embodiment of the present application.
  • the dotted line in FIG. 7 shows the outline of the insulating tab housing 334 .
  • the second tab 332 may include a tab part 3323 , a tab part 3324 and a tab part 3325 .
  • the tab part 3323 may be a part of the second tab 332 close to the pole piece.
  • the tab part 3323 can be located in the cell casing 306 shown in FIG. 2 .
  • the tab part 3323 may correspond to the first part 3301 of the tab assembly 330 shown in FIG. 3 .
  • the third shell opening 3343 of the insulating tab shell 334 may be located in the projection area of the tab portion 3323 on the insulating tab shell 334 .
  • the projection area of the tab portion 3323 on the first insulating layer 333 may be located outside the first opening 3331 of the first insulating layer 333 .
  • the projected area of the tab portion 3323 on the insulating tab housing 334 may be located outside the first housing opening 3341 of the insulating tab housing 334 .
  • the projected area of the tab part 3313 of the first tab 331 on the first insulating part 3335 of the first insulating layer 333 may correspond to the first partial area of the first insulating part 3335, and the area of the second tab 332
  • the projected area of the tab portion 3323 on the first insulating portion 3335 may correspond to the second partial area of the first insulating portion 3335 , and the first partial area and the second partial area may not cross each other. This helps to reduce the possibility of the first tab 331 and the second tab 332 being short-circuited through the first opening 3331 of the first insulating layer 333 .
  • the tab part 3324 may be a part of the second tab 332 close to the circuit board 320 .
  • the tab portion 3324 may be located outside the cell casing 306 shown in FIG. 2 .
  • the tab portion 3324 may correspond to the second portion 3302 of the tab assembly 330 shown in FIG. 3 .
  • the fourth shell opening 3344 of the insulating tab shell 334 may be located in the projection area of the tab portion 3324 on the insulating tab shell 334 .
  • the projected area of the tab portion 3324 on the first insulating layer 333 may be located outside the second opening 3332 of the first insulating layer 333 .
  • the projection area of the tab part 3324 on the insulating tab shell 334 may be located at the second shell opening 3342 of the insulating tab shell 334 .
  • the projection area of the tab part 3314 of the first tab 331 on the second insulating part 3336 of the first insulating layer 333 may correspond to the third partial area of the second insulating part 3336, and the second tab 332
  • the projected area of the tab portion 3324 on the second insulating portion 3336 may correspond to the fourth partial area of the second insulating portion 3336, and the third partial area and the fourth partial area may not cross each other. Therefore, it is beneficial to reduce the possibility of the first tab 331 and the second tab 332 being short-circuited through the second opening 3332 of the first insulating layer 333 .
  • the tab part 3325 may be connected between the tab part 3323 and the tab part 3324 .
  • the tab portion 3325 may correspond to the third portion 3303 of the tab assembly 330. That is to say, the tab part 3323 and the tab part 3324 may be located at two ends of the tab part 3325 .
  • the outline of the tab portion 3325 may correspond to the outline of the third insulating portion 3337 of the first insulating layer 333 .
  • the end surface area of the tab portion 3325 may be slightly smaller than the end surface area of the third insulating portion 3337 .
  • the width of the tab portion 3325 may be slightly smaller than the width of the third insulating portion 3337 .
  • the first insulating layer 333 may further include a third opening 3333 and a fourth opening 3334 .
  • the third opening 3333 and the fourth opening 3334 may be windows of the first insulating layer 333 for exposing the second tab 332 . Viewing the first insulating layer 333 from a side of the first insulating layer 333 away from the second tab 332 , the second tab 332 can be observed through the third opening 3333 and the fourth opening 3334 . That is to say, the third opening 3333 and the fourth opening 3334 may be located in the projection area of the second tab 332 on the first insulating layer 333 .
  • the third opening 3333 may be located at an end of the first insulating layer 333 close to the pole piece.
  • the third opening 3333 may be disposed on the first insulating part 3335, for example.
  • the fourth opening 3334 may be located at an end of the first insulating layer 333 close to the circuit board 320 .
  • the fourth opening 3334 may be disposed on the second insulating portion 3336 .
  • the projection area of the tab portion 3323 of the second tab on the first insulating layer 333 may be outside the third opening 3333 of the first insulating layer 333 .
  • the projection area of the tab portion 3324 of the second tab on the first insulating layer 333 may be located outside the fourth opening 3334 of the first insulating layer 333 .
  • An opening for exposing the first tab 331 and an opening for exposing the second tab 332 are provided on the first insulating layer 333. From each side of the first insulating layer 333, both the first tab 331 and the second tab 332 can be realized.
  • the electrical connection of the pole piece and/or the circuit board 320 can also realize the electrical connection between the second tab 332 and the pole piece and/or the circuit board 320 , which is beneficial to improve the processing convenience of the tab assembly 330 .
  • the third opening 3333 of the first insulating layer 333 can be arranged opposite to the third opening 3343 of the insulating lug shell 334, and the fourth opening 3334 of the first insulating layer 333 can be arranged opposite to the third opening 3343 of the insulating lug shell 334.
  • the fourth shell opening 3344 of the insulating lug shell 334 is oppositely disposed.
  • the third shell opening 3343 of the insulating tab shell 334 may be located on a side of the tab assembly 300 close to the first tab 331 .
  • the fourth shell opening 3344 of the insulating tab shell 334 may be located on a side of the tab assembly 300 close to the first tab 331 .
  • the second tab 332 can expose the insulating tab from the side of the insulating tab shell 334 away from the second tab 332. Housing 334 .
  • the projection area of the first connecting portion 3321 of the second tab 332 in the insulating tab housing 334 corresponds to the third housing opening 3343 , or is located in the third housing opening 3343 .
  • the first connection portion 3321 of the second tab 332 corresponds to the third opening 3333 in the projected area of the first insulating layer 333 , or is located in the third opening 3333 .
  • the projection area of the second connecting portion 3322 of the second tab 332 in the insulating tab housing 334 corresponds to the fourth housing opening 3344 , or is located in the fourth housing opening 3344 .
  • the second connection portion 3322 of the second tab 332 corresponds to the fourth opening 3334 in the projection area of the first insulating layer 333 , or is located in the fourth opening 3334 .
  • FIG. 8 shows a schematic structural diagram of a battery cell 310 provided by an embodiment of the present application.
  • the first connection part 3311 of the first tab 331 can be electrically connected to the first pole connection part 307 of the battery cell 310 through the electrical connection part 309; the first connection of the second tab 332
  • the part 3321 can be electrically connected with the second pole connection part 308 of the battery cell 310 through the electrical connection part 309 .
  • the first pole connector 307 may be electrically connected to the first tab 331 .
  • the second pole connection piece 308 can be electrically connected to the second pole tab 332 through the electrical connection piece 309 penetrating through the third shell opening 3343 of the insulating tab shell 334 .
  • the part of the first pole connecting piece 307 away from the pole piece can be bent or folded. This is beneficial to reduce the occupied space of the first pole connecting member 307 in the battery cell 310 .
  • the occupied space of the first pole connecting member 307 is reduced, which is beneficial to improve the energy storage of the battery cell 310 .
  • the part of the first pole connecting member 307 away from the pole piece can be generally arranged parallel to the side of the battery case 306 shown in FIG. 2 .
  • the folding direction of the first pole connecting member 307 may be perpendicular to the side of the battery case 306 .
  • the side surface of the cell casing 306 may be a surface of the cell casing 306 parallel to the thickness direction of the cell 310 .
  • An end of the first pole connecting member 307 farthest from the pole piece may be parallel to the side of the battery case 306 .
  • the structure of the second pole connecting piece 308 can refer to the structure of the first pole connecting piece 307 .
  • FIG. 9 a schematic structural diagram shown in FIG. 9 can be obtained.
  • the first portion 3301 of the tab assembly 330 can be fixedly connected to the side of the first pole connecting member 307 that is farthest from the pole piece.
  • the first part 3301 of the tab assembly 330 can be inserted into the folding gap 3701 of the first pole connector 307 , and be connected to a part of the first pole connector 307 located in the folding gap 3701 . Parts on one or both sides are fixedly connected.
  • the folding gap 3701 of the first pole connector 307 can limit the first part 3301 of the tab assembly 330, reduce any swaying of the first pole connector 307 in the battery core, and facilitate the improvement of the first pole connector 307 and the tab. Connection stability of assembly 330 .
  • the components in the battery cell can be hot-pressed.
  • the pole connector can be pressed into a folded state.
  • One end of the tab assembly extends into the folding gap of the pole connector, and the connection relationship between the tab assembly and the pole connector can also be constrained by the battery shell, which is conducive to improving the connection between the first pole connector 307 and the tab assembly 330 stability.
  • the first pole connector 307 may include a first segment 3702 , a second segment 3703 and a third segment 3704 .
  • the first segment 3702 and the second segment 3703 may be arranged in parallel with respect to the side of the cell casing 306 shown in FIG. 2 .
  • the first segment 3702 may be located on a side of the second segment 3703 away from the pole piece.
  • the second segment 3703 may be located on a side of the second segment 3703 away from the pole piece.
  • the third segment 3704 may be connected between the first segment 3702 and the second segment 3703 , and the third segment 3704 may be a bending area of the first pole connecting member 307 .
  • the third segment 3704 may be vertically disposed relative to the side of the cell housing 306 , for example.
  • the first portion 3301 of the tab assembly 330 close to the pole piece can be inserted into the folding gap 3701 between the first segment 3702 and the second segment 3703 of the first pole connector 307 .
  • the first portion 3301 of the tab assembly 330 may be connected to a side of the first segment 3702 away from the second segment 3703 . In the embodiment shown in FIG. 9 , the first portion 3301 of the tab assembly 330 may be connected to a side of the first segment 3702 close to the second segment 3703 . In another embodiment, the first portion 3301 of the tab assembly 330 may be connected to a side of the second segment 3703 close to the first segment 3702 . In yet another embodiment, the first portion 3301 of the tab assembly 330 may be connected to a side of the first segment 3702 close to the second segment 3703 , and connected to a side of the second segment 3703 close to the first segment 3702 .
  • the first portion 3301 of the tab assembly 330 and the first pole connector 307 may be electrically connected by solder.
  • the solder may be, or be part of, the electrical connector 309 shown in FIG. 9 .
  • solder can be filled into the first shell opening 3341 of the insulating tab shell 334 and filled into the first opening 3331 of the first insulating layer 333 .
  • connection manner between the first connection portion 3321 of the second tab 332 and the second pole connection piece 308 shown in FIG. 8 can refer to the connection manner between the first connection portion 3311 of the first tab 331 and the first pole connection piece 307 .
  • first connection portion 3321 of the second tab 332 can be electrically connected to the second pole piece through an electrical connection piece passing through the opening 3341 of the third housing.
  • the first portion 3301 of the tab assembly 330 and the first pole connector 307 may be electrically connected through a disconnecting device.
  • the breaking device may be the electrical connector 309 shown in FIG. 9 , or a part of the electrical connector 309 shown in FIG. 9 .
  • the breaking device can disconnect the path between the first part 3301 of the tab assembly 330 and the first pole connector 307, or significantly increase the resistance of the breaking device itself to reduce the resistance of the tab.
  • the conduction current between the first part 3301 of the assembly 330 and the first pole connector 307 can disconnect the path between the first part 3301 of the tab assembly 330 and the first pole connector 307 .
  • Breaking devices include but are not limited to one or more of the following: positive temperature coefficient resistors, high-current fuses (overheating fuse devices), high-current thermal expansion devices (disconnecting through the principle of thermal expansion), etc.
  • the breaking device may also be referred to as a high current breaking device.
  • a disconnecting device may be disposed between the tab assembly 330 and the first pole connecting member 307 . As shown in FIG. 9 , the disconnecting device may be electrically connected between the first portion 3301 of the tab assembly 330 and the first segment 3702 of the first pole connector 307 . In one embodiment, the tab assembly 330 and the disconnecting device may be connected by solder; the disconnecting device and the first section 3702 of the first pole connecting member 307 may be connected by solder.
  • the first pole connector 307 may include a connector base and an insulating coating, and the insulating coating may be wrapped around the outer periphery of the connector base.
  • the connector body may be a conductor.
  • the area of the first pole connecting piece 307 connected to the tab assembly 330 may not be provided with an insulating coating, so that the connector base of the first pole connecting piece 307 can be electrically connected to the tab assembly 330 .
  • the insulating coating is beneficial to prevent direct electrical connection between the tab assembly 330 and the first pole connector 307 bypassing the breaking device.
  • the disconnecting device may also be arranged between the tab assembly 330 and the second pole connecting member 308 .
  • the breaking device is arranged between the tab assembly 330 and the second pole connector 308 .
  • FIG. 10 is an exploded view of a battery cell 310 provided in an embodiment of the present application.
  • the tab assembly 330 may include a first connector 311 .
  • the first connector 311 can be disposed on the second part 3302 of the tab assembly 330 . That is to say, the first connector 311 may be disposed on a part of the tab assembly 330 other than the cell housing 306 shown in FIG. 2 .
  • the first connector 311 may include a plurality of ports. It is assumed that a plurality of ports may include a port 3111 and a port 3112 . Referring to FIG. 3 , FIG. 6 and FIG. 10 , the port 3111 can be electrically connected to the second connection portion 3312 of the first tab 331 . The port 3112 may be electrically connected to the second connection portion 3322 of the second tab 332 .
  • the port 3111 of the first connector 311 is configured to be electrically connected to the second tab portion 3314 of the first tab 331 through an electrical connection piece passing through the second opening 3332 of the first insulating layer 333 .
  • the port 3111 of the first connector 311 is configured as an electrical connection through the second opening 3332 penetrating the first insulating layer 333 and the second housing opening 3342 of the insulating tab housing 334 , with the first The second tab portion 3314 of the tab 331 is electrically connected.
  • the port 3112 of the first connector 311 is configured to be electrically connected to the second pole piece through the second tab 332 .
  • the port 3112 of the first connector 311 is configured to be electrically connected to the second pole piece through an electrical connection piece passing through the fourth housing opening 3344 of the insulating tab housing 334 .
  • the port of the first connector 311 and the tab can be connected, for example, by solder, and the solder can pass through the shell opening of the insulating tab shell 334 or the opening of the first insulating layer 333 .
  • the plurality of ports of the first connector 311 may further include a port 3113 and a port 3114 .
  • the port 3113 and the port 3114 may be ports of the first connector 311 mated with other connectors.
  • the port 3113 may be electrically connected or short-circuited with the port 3111 , and the port 3114 may be electrically connected or short-circuited with the port 3112 .
  • the port 3113 may not be short-circuited with the port 3112, and the port 3114 may not be short-circuited with the port 3111.
  • FIG. 11 shows an exploded view of a battery cell 310 and a circuit board 320 provided by the embodiment of the present application.
  • the circuit board 320 may include a cell protection circuit.
  • the circuit board 320 may be, for example, a cell protection board.
  • the circuit board 320 may be provided with a second connector 312, and the second connector 312 may cooperate with and be electrically connected to the first connector 311 of the tab assembly 330, so that the tab assembly 330 and the circuit board 320 may be connected through the first connection.
  • Connector 311 and second connector 312 are electrically connected.
  • the first connector 311 and the second connector 312 may be connected by, for example, buckling, plugging and the like.
  • the second connector 312 may include a plurality of ports.
  • the plurality of ports of the second connector 312 may include a port 3121 and a port 3122 .
  • the port 3121 of the second connector 312 can be matched with the port 3113 of the first connector 311 , so that the second connector 312 can be electrically connected with the first tab 331 of the tab assembly 330 through the first connector 311 .
  • the port 3122 of the second connector 312 can cooperate with the port 3114 of the first connector 311 , so that the second connector 312 can be electrically connected with the second tab 332 of the tab assembly 330 through the first connector 311 .
  • the plurality of ports of the second connector 312 may further include a port 3123 and a port 3124 .
  • the port 3123 may be electrically connected to the port 3121 .
  • Port 3124 may be electrically connected to port 3122 .
  • Port 3123 may not be short-circuited with port 3122.
  • Port 3124 may not be short-circuited with port 3121.
  • the second connector 312 can be electrically connected to the circuit on the circuit board 320 through the port 3123 and the port 3124 .
  • the cell protection circuit of the electronic device 100 can communicate with The battery cells 310 are electrically connected.
  • the lug assembly shown in Fig. 3 to Fig. 7 is conducive to the stable electrical connection between the battery cell and the circuit board, and in scenarios such as maintenance, the electrical connection between the battery cell and the circuit board can be relatively easily released.
  • the circuit board such as the battery cell protection board
  • the battery cell protection board can still work normally, then by releasing the electrical connection between the battery cell and the circuit board during maintenance, and replacing the new battery, Then the cell protection circuit in the electronic device can still continue to work.
  • the battery cell protection board is scrapped and the battery cell can still work normally, the electrical connection between the battery cell and the battery cell protection board is removed during maintenance, and a new battery cell protection board is replaced. , the batteries in the electronic equipment can still continue to work. Therefore, it is beneficial to improve the recycling rate of the battery cell or the battery cell protection board.
  • FIG. 12 shows a schematic structural diagram of another tab assembly 330 provided by an embodiment of the present application. Observing along the B-B section shown in FIG. 12 , a cross-sectional view of the tab assembly 330 shown in FIG. 13 can be obtained.
  • the tab assembly 330 can be divided into a first part 3301 , a second part 3302 and a third part 3303 .
  • the tab assembly 330 shown in FIG. 12 may include a first tab 331 , a second tab 332 , a first insulating layer 333 , and an insulating tab shell 334 .
  • the tab assembly 330 shown in FIGS. 12 and 13 may further include a third tab 335 and a second insulating layer 336 .
  • the third tab 335 may correspond to the reference electrode of the cell 310 .
  • a reference electrode can be used to detect positive or negative potentials.
  • the voltage difference between the reference electrode and the positive electrode may be a positive electrode potential
  • the voltage difference between the reference electrode and the negative electrode may be a negative electrode potential.
  • the first tab 331, the second tab 332, the third tab 335, the first insulating layer 333, and the second insulating layer 336 are stacked, and the insulating tab shell 334 can be wrapped in The outer periphery of the laminated structure formed by the first tab 331 , the second tab 332 , the third tab 335 , the first insulating layer 333 , and the second insulating layer 336 .
  • the second tab 332 can be located between the first tab 331 and the third tab 335, the second insulating layer 336 can be located between the second tab 332 and the third tab 335, the second insulating layer 336 can be used for The second tab 332 and the third tab 335 are spaced apart so as to avoid short circuit between the second tab 332 and the third tab 335 .
  • the insulating tab housing 334 may further include a fifth housing opening 3345 and a sixth housing opening 3346 .
  • the fifth shell opening 3345 and the sixth shell opening 3346 may be windows of the insulating tab shell 334 for exposing the third tab 335 . Observing the insulating tab housing 334 from a side away from the third tab 335 , the third tab 335 can be observed through the fifth housing opening 3345 and the sixth housing opening 3346 . That is to say, the fifth case opening 3345 and the sixth case opening 3346 may be located within the projection area of the third tab 335 on the insulating tab case 334 .
  • the fifth shell opening 3345 may be located at an end of the insulating lug shell 334 close to the pole piece.
  • the fifth shell opening 3345 can be disposed on the first part 3301 of the tab assembly 330 , for example.
  • the sixth housing opening 3346 may be located at an end of the insulating tab housing 334 close to the circuit board 320 .
  • the sixth housing opening 3346 can be disposed on the second portion 3302 of the tab assembly 330 , for example.
  • the part of the third tab 335 exposed from the fifth shell opening 3345 may be the first connecting portion 3351 of the third tab 335 .
  • the part of the third tab 335 exposed from the sixth housing opening 3346 may be the second connection portion 3352 of the third tab 335 .
  • the first connecting portion 3351 of the third tab 335 corresponds to the fifth shell opening 3345 in the projected area of the insulating tab shell 334, or the second connecting portion 3352 of the third tab 335 is located in the fifth shell opening 3345 at the insulating pole.
  • the projected area of the ear shell 334 corresponds to the sixth shell opening 3346, or is located within the sixth shell opening 3346
  • FIG. 14 shows a schematic structural diagram of the first tab 331 provided by the embodiment of the present application.
  • the specific structure of the first tab 331 shown in FIG. 14 can refer to the first tab 331 shown in FIG. 5 .
  • the dotted line in FIG. 14 shows the outline of the insulating tab housing 334 .
  • the projection area of the first tab 331 shown in FIG. 14 on the insulating tab shell 334 shown in FIG. 12 can be spaced apart from the fifth shell opening 3345 of the insulating tab shell 334.
  • the projected area on the ear shell 334 is outside the fifth shell opening 3345 .
  • the projected area of the first tab 331 on the insulating tab shell 334 shown in FIG. 14 can be spaced from the sixth shell opening 3346 of the insulating tab shell 334, that is, the first tab 331 is on the insulating tab shell 334.
  • the projected area of is located outside the sixth housing opening 3346.
  • FIG. 15 shows a schematic structural view of another first insulating layer 333 provided by the embodiment of the present application. Different from the first insulating layer 333 shown in FIG. 6, the first insulating layer 333 shown in FIG. Opening 3334. Other structures of the first insulating layer 333 shown in FIG. 15 can refer to the embodiment shown in FIG. 6 .
  • the first insulating layer 333 shown in FIG. 6 may also be applied to the embodiment shown in FIG. 12 .
  • the first insulating layer 333 shown in FIG. 15 can also be applied to the embodiment shown in FIG. 3 .
  • FIG. 16 shows a schematic structural diagram of the second tab 332 provided by the embodiment of the present application.
  • the specific structure of the second tab 332 shown in FIG. 16 can refer to the second tab 332 shown in FIG. 5 .
  • the dotted line in FIG. 16 shows the outline of the insulating tab housing 334 .
  • the projection area of the second tab 332 shown in FIG. 16 on the insulating tab shell 334 shown in FIG. 12 can be spaced apart from the fifth shell opening 3345 of the insulating tab shell 334.
  • the projected area on the ear shell 334 is outside the fifth shell opening 3345 .
  • the projection area of the second tab 332 on the insulating tab shell 334 shown in FIG. 14 can be spaced apart from the sixth shell opening 3346 of the insulating tab shell 334, that is, the second tab 332 is on the insulating tab shell 334.
  • the projected area of is located outside the sixth housing opening 3346.
  • FIG. 17 shows a schematic structural view of a second insulating layer 336 provided by an embodiment of the present application.
  • the second insulating layer 336 may include a fourth insulating part 3365 , a fifth insulating part 3366 and a sixth insulating part 3367 .
  • the fourth insulating part 3365 may be a part of the second insulating layer 336 close to the pole piece.
  • the fourth insulating part 3365 can be located in the cell casing 306 shown in FIG. 2 .
  • the fourth insulating part 3365 may correspond to the first part 3301 of the tab assembly 330 shown in FIG. 12 .
  • the fifth insulating part 3366 may be a part of the second insulating layer 336 close to the circuit board 320 .
  • the fifth insulating part 3366 may be located outside the cell casing 306 shown in FIG. 2 .
  • the fifth insulating part 3366 may correspond to the second part 3302 of the tab assembly 330 shown in FIG. 12 .
  • the sixth insulating part 3367 may be connected between the fourth insulating part 3365 and the fifth insulating part 3366 .
  • the sixth insulating part 3367 may correspond to the third part 3303 of the tab assembly 330 shown in FIG. 12 . That is, the fourth insulation part 3365 and the fifth insulation part 3366 may be located at both ends of the sixth insulation part 3367 .
  • the second insulating layer 336 may include fifth openings 3361 and sixth openings 3362 .
  • the fifth opening 3361 and the sixth opening 3362 may be windows of the second insulating layer 336 for exposing the first tab 331 . Viewing the second insulating layer 336 from a side of the second insulating layer 336 away from the first tab 331 , the first tab 331 can be observed through the fifth opening 3361 and the sixth opening 3362 . That is to say, the fifth opening 3361 and the sixth opening 3362 may be located in the projection area of the first tab 331 on the second insulating layer 336 .
  • the fifth opening 3361 may be located at an end of the second insulating layer 336 close to the pole piece.
  • the fifth opening 3361 may be provided in the fourth insulating part 3365, for example.
  • the sixth opening 3362 may be located at an end of the second insulating layer 336 close to the circuit board 320 .
  • the sixth opening 3362 may be provided in the fifth insulating part 3366, for example.
  • the projection area of the tab portion 3323 of the second tab 332 on the second insulating layer 336 may be located outside the fifth opening 3361 of the second insulating layer 336 .
  • the projection area of the tab portion 3324 of the second tab 332 on the second insulating layer 336 may be outside the sixth opening 3362 of the second insulating layer 336 .
  • the fifth opening 3361 of the second insulating layer 336 can be disposed opposite to the first opening 3331 of the first insulating layer 333 . Viewing the second insulating layer 336 from a side away from the first tab 331 , the first tab 331 can be observed through the fifth opening 3361 and the first opening 3331 .
  • the projected area of the fifth opening 3361 of the second insulating layer 336 on the first tab 331 may cross or overlap the projected area of the first opening 3331 of the first insulating layer 333 on the first tab 331 .
  • the sixth opening 3362 of the second insulating layer 336 can be disposed opposite to the second opening 3332 of the first insulating layer 333 .
  • the first tab 331 can be observed through the sixth opening 3362 and the second opening 3332 .
  • the projected area of the sixth opening 3362 of the second insulating layer 336 on the first tab 331 may cross or overlap the projected area of the second opening 3332 of the first insulating layer 333 on the first tab 331 .
  • the fifth opening 3361 of the second insulating layer 336 can be arranged opposite to the first shell opening 3341 of the insulating lug shell 334, and the sixth opening 3362 of the second insulating layer 336 can be arranged opposite to the first shell opening 3341 of the insulating lug shell 334.
  • the second shell opening 3342 of the insulating tab shell 334 is oppositely disposed.
  • the first shell opening 3341 of the insulating tab shell 334 is located on the side of the tab assembly 300 away from the first tab 331
  • the second shell opening 3342 of the insulating tab shell 334 is located on the side of the tab assembly 300 away from the first tab 331 side.
  • the insulating tab housing 334 Observing the insulating tab housing 334 from a side away from the first tab 331, through the first housing opening 3341, the fifth opening 3361 and the first opening 3331, one can observe the side of the first tab 331 close to the pole piece; Through the second shell opening 3342 , the sixth opening 3362 and the second opening 3332 , one side of the first tab 331 close to the circuit board 320 can be observed. Through the first opening 3331, the second opening 3332, the fifth opening 3361, the sixth opening 3362, the first shell opening 3341, and the second shell opening 3342, the first tab 331 can be away from the first pole from the insulating tab shell 334. One side of the ear 331 exposes the insulating tab shell 334 .
  • the projected area of the first connection portion 3311 of the first tab 331 shown in FIG. 12 corresponds to the fifth opening 3361 in the second insulating layer 336 , or is located in the fifth opening 3361 .
  • the second connection portion 3312 of the first tab 331 corresponds to the sixth opening 3362 in the projected area of the second insulating layer 336 , or is located in the sixth opening 3362 .
  • the second insulating layer 336 may further include a seventh opening 3363 and an eighth opening 3364 .
  • the seventh opening 3363 and the eighth opening 3364 may be windows of the second insulating layer 336 for exposing the second tab 332 . Viewing the second insulating layer 336 from a side of the second insulating layer 336 away from the second tab 332 , the second tab 332 can be observed through the seventh opening 3363 and the eighth opening 3364 . That is to say, the seventh opening 3363 and the eighth opening 3364 may be located in the projection area of the second tab 332 on the second insulating layer 336 .
  • the seventh opening 3363 may be located at an end of the second insulating layer 336 close to the pole piece.
  • the seventh opening 3363 may be provided in the fourth insulating part 3365, for example.
  • the eighth opening 3364 may be located at an end of the second insulating layer 336 close to the circuit board 320 .
  • the eighth opening 3364 can be provided in the fifth insulating part 3366 .
  • the projection area of the tab portion 3313 of the first tab 331 on the second insulating layer 336 may be located outside the seventh opening 3363 of the second insulating layer 336 .
  • the projected area of the tab portion 3314 of the first tab 331 on the second insulating layer 336 may be outside the eighth opening 3364 of the second insulating layer 336 .
  • the third opening 3333 is oppositely disposed. Viewing the second insulating layer 336 from a side away from the second tab 332 , the second tab 332 can be observed through the seventh opening 3363 and the third opening 3333 .
  • the projected area of the seventh opening 3363 of the second insulating layer 336 on the second tab 332 may cross or overlap the projected area of the third opening 3333 of the first insulating layer 333 on the second tab 332 .
  • the fourth opening 3334 is oppositely disposed. Viewing the second insulating layer 336 from a side away from the second tab 332 , the second tab 332 can be observed through the eighth opening 3364 and the fourth opening 3334 .
  • the projected area of the eighth opening 3364 of the second insulating layer 336 on the second tab 332 may cross or overlap the projected area of the fourth opening 3334 of the first insulating layer 333 on the second tab 332 .
  • the seventh opening 3363 of the second insulating layer 336 can be arranged opposite to the third shell opening 3343 of the insulating lug shell 334, and the eighth opening 3364 of the second insulating layer 336 can be arranged opposite to the third shell opening 3343 of the insulating lug shell 334.
  • the fourth shell opening 3344 of the insulating lug shell 334 is oppositely disposed.
  • the first shell opening 3341 of the insulating tab shell 334 is located on the side of the tab assembly 300 away from the first tab 331
  • the second shell opening 3342 of the insulating tab shell 334 is located on the side of the tab assembly 300 away from the first tab 331 side.
  • the second tab 332 can be away from the second pole from the insulating tab shell 334.
  • One side of the ear 332 exposes the insulating tab shell 334 .
  • the projected area of the first connection portion 3321 of the second tab 332 shown in FIG. 12 corresponds to the seventh opening 3363 in the second insulating layer 336 , or is located in the seventh opening 3363 .
  • the second connection portion 3322 of the second tab 332 corresponds to the eighth opening 3364 in the projected area of the second insulating layer 336 , or is located in the eighth opening 3364 .
  • FIG. 18 shows a schematic structural diagram of the third tab 335 provided by the embodiment of the present application.
  • the dotted line in Figure 18 shows the outline of the insulating tab housing 334.
  • the third tab 335 may include a tab part 3353 , a tab part 3354 and a tab part 3355 .
  • the tab part 3353 may be a part of the third tab 335 close to the pole piece.
  • the tab part 3353 can be located in the cell casing 306 shown in FIG. 2 .
  • the tab part 3353 may correspond to the first part 3301 of the tab assembly 330 shown in FIG. 12 .
  • the fifth shell opening 3345 of the insulating tab shell 334 may be located in the projection area of the tab portion 3353 on the insulating tab shell 334 .
  • the projection area of the tab portion 3353 on the insulating tab housing 334 may be located outside the first housing opening 3341 and the third housing opening 3343 of the insulating tab housing 334 .
  • the projection area of the tab portion 3353 on the insulating tab housing 334 may be located outside the second housing opening 3342 and the fourth housing opening 3344 of the insulating tab housing 334 .
  • the projected area of the tab portion 3353 on the first insulating layer 333 may be located outside the first opening 3331 and the third opening 3333 of the first insulating layer 333 .
  • the projection area of the tab part 3353 on the second insulating layer 336 may be located outside the fifth opening 3361 and the seventh opening 3363 of the second insulating layer 336 .
  • the projection area of the lug part 3313 of the first lug 331 on the insulating lug shell 334 may correspond to the first partial area of the insulating lug shell 334, and the lug part of the second lug 332
  • the projected area of 3323 on the insulating tab shell 334 may correspond to the second partial area of the insulating tab shell 334
  • the projected area of the third tab 335's tab part 3353 on the insulating tab shell 334 may correspond to the area of the insulating tab shell 334.
  • the third partial area, the first partial area, the second partial area and the third partial area may not intersect each other. Therefore, it is beneficial to reduce the possibility of short circuit among the first tab 331 , the second tab 332 and the third tab 335 .
  • the tab part 3354 may be a part of the third tab 335 close to the circuit board 320 .
  • the tab portion 3354 may be located outside the cell casing 306 shown in FIG. 2 .
  • the tab portion 3354 may correspond to the second portion 3302 of the tab assembly 330 .
  • the sixth shell opening 3346 of the insulating tab shell 334 may be located in the projected area of the tab portion 3354 on the insulating tab shell 334 .
  • the projection area of the tab portion 3353 on the insulating tab housing 334 may be located outside the first housing opening 3341 and the third housing opening 3343 of the insulating tab housing 334 .
  • the projection area of the tab portion 3353 on the insulating tab housing 334 may be located outside the second housing opening 3342 and the fourth housing opening 3344 of the insulating tab housing 334 .
  • the projection area of the tab part 3354 on the first insulating layer 333 may be located outside the second opening 3332 and the fourth opening 3334 of the first insulating layer 333 .
  • the projection area of the tab portion 3354 on the second insulating layer 336 may be located outside the sixth opening 3362 and the eighth opening 3364 of the second insulating layer 336 .
  • the projected area of the tab part 3314 of the first tab 331 on the insulating tab shell 334 can correspond to the fourth part of the insulating tab shell 334, and the tab of the second tab 332
  • the projected area of the part 3324 on the insulating tab shell 334 may correspond to the fifth partial area of the insulating tab shell 334
  • the projected area of the third tab 335's tab part 3354 on the insulating tab shell 334 may correspond to the insulating tab shell 334
  • the sixth sub-area, the above-mentioned fourth sub-area, fifth sub-area and sixth sub-area may not intersect each other. Therefore, it is beneficial to reduce the possibility of short circuit among the first tab 331 , the second tab 332 and the third tab 335 .
  • the tab part 3355 may be connected between the tab part 3353 and the tab part 3354 .
  • the tab portion 3355 may correspond to the third portion 3303 of the tab assembly 330 . That is to say, the tab part 3353 and the tab part 3354 may be located at two ends of the tab part 3355 .
  • the outline of the tab portion 3355 may correspond to the outline of the third insulating portion 3337 of the first insulating layer 333 .
  • the end surface area of the tab portion 3355 may be slightly smaller than the end surface area of the third insulating portion 3337 .
  • the width of the lug portion 3355 may be slightly smaller than the width of the third insulating portion 3337 .
  • the second tab 332 is located between the first tab 331 and the third tab 335 .
  • the functions of the first tab 331, the second tab 332, and the third tab 335 can be exchanged.
  • the first tab 331 is a tab of the reference electrode
  • one of the second tab 332 and the third tab 335 is a positive tab
  • the other is a negative tab.
  • the second tab 332 is a tab of the reference electrode
  • one of the first tab 331 and the third tab 335 is a positive tab
  • the other is a negative tab.
  • FIG. 19 shows a schematic structural diagram of a battery cell 310 provided by an embodiment of the present application. Similar to the electric core 310 shown in FIG. 8 , the first connecting part 3311 of the first tab 331 can be electrically connected to the first pole connecting part 307 of the electric core 310 through the electrical connecting part 309; the first connecting part 3311 of the second tab 332 The connection part 3321 can be electrically connected with the second pole connection part 308 of the battery cell 310 through the electrical connection part 309 .
  • the tab portion 3313 of the first tab 331 can be electrically connected to the first pole piece through the electrical connection piece passing through the first opening 3331 of the first insulating layer 333 and the fifth opening 3361 of the second insulating layer 336 .
  • the tab portion 3323 of the second tab 332 can be electrically connected to the second pole piece through the electrical connection piece passing through the seventh opening 3363 of the second insulating layer 336 .
  • the first connection portion 3351 of the third tab 335 can be connected to the electrolyte 303 shown in FIG. 2 .
  • the first connection portion 3351 of the third tab 335 may be in contact with the electrolyte 303 .
  • the battery cell 310 may further include a third pole connector (the structure of the third pole connector may refer to the above-mentioned first pole connector 307 ).
  • One end of the third pole connector can extend into the battery case 306 shown in FIG. 2 and fully contact the electrolyte in the battery case 306, so that the third pole connector can react in the electrolyte.
  • the third pole connector is not short-circuited with the positive pole piece and the negative pole piece shown in FIG. 2 .
  • the third pole connecting piece can be in contact with a porous insulating film such as a diaphragm, so as to avoid short circuits between the third pole connecting piece and the positive pole piece and between the third pole connecting piece and the negative pole piece.
  • the other end of the third pole connector can protrude from the battery case 306 .
  • the part of the third pole connecting member outside the battery case 306 may be electrically connected to the third pole tab 335 .
  • the third tab 335 can be electrically connected to the electrolyte through the electrical connection piece passing through the fifth housing opening 3345 and the third pole connection piece.
  • FIG. 20 is an exploded view of a battery cell 310 provided in an embodiment of the present application. Similar to the tab assembly 330 shown in FIG. 10 , the tab assembly 330 shown in FIG. 20 may include a first connector 311 .
  • the port 3111 of the first connector 311 is configured as an electrical connection through the second opening 3332 of the first insulating layer 333 and the sixth opening 3362 of the second insulating layer 336, and is connected to the second tab of the first tab 331.
  • Section 3314 is electrically connected.
  • the port 3111 of the first connector 311 is configured to be electrically connected to the first pole piece through an electrical connection piece passing through the second housing opening 3342 of the insulating tab housing 334 .
  • the port 3112 of the first connector 311 is configured to be electrically connected to the second tab portion 3324 of the second tab 332 through an electrical connection piece passing through the eighth opening 3364 of the second insulating layer 336 .
  • the port 3112 of the first connector 311 is configured to be electrically connected to the second pole piece through an electrical connection piece passing through the fourth housing opening 3344 of the insulating tab housing 334 .
  • the first connector 311 shown in FIG. 20 may further include a port 3115 and a port 3116 .
  • the port 3115 may be electrically connected to the second connection portion 3352 of the third tab 335 .
  • the port 3115 can be configured to be electrically connected to the second connection portion 3352 of the third tab 335 through an electrical connection piece passing through the sixth shell opening 3346 of the insulating tab shell 334 .
  • the port 3116 may be a port of the first connector 311 that mates with other connectors. Port 3116 may be electrically connected or shorted to port 3115. Port 3116 may not be short-circuited with port 3111 and port 3112.
  • FIG. 21 shows an exploded view of a battery cell 310 and a circuit board 320 provided in the embodiment of the present application. Similar to the circuit board 320 shown in FIG. 11 , the circuit board 320 may be provided with a second connector 312 .
  • the second connector 312 shown in FIG. 21 may further include a port 3125 and a port 3126 .
  • the port 3125 can cooperate with the port 3116 of the first connector 311, so that the second connector 312 can be electrically connected with the third tab 335 of the tab assembly 330 through the first connector 311.
  • Port 3126 may be electrically connected to port 3125 . Port 3126 may not be short-circuited with port 3121 and port 3122.
  • the second connector 312 can be electrically connected to the circuit on the circuit board 320 through the port 3126 .
  • the cell protection circuit of the electronic device 100 can pass through the circuit on the circuit board 320 , the second connector 312 , the first connector 311 of the tab assembly 330 , the first tab 331 , the second tab 332 and the second tab assembly 330 .
  • the three-pole ear 335 is electrically connected to the battery cell 310 .
  • FIG. 22 is a kind of tab provided in the embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a tab 350 provided in the embodiment of the present application.
  • the tab 350 may be a part of the cell 310 shown in FIG. 1 and FIG. 2 .
  • the first end of the tab 350 may be located in the cell casing 306 shown in FIG. 2 .
  • the first end of the tab 350 may be electrically connected to the first pole piece of the battery cell 310 , wherein the first pole piece may be the positive pole piece 301 or the negative pole piece 302 shown in FIG. 2 .
  • the tab 350 can be the positive pole tab 350 ; when the first pole piece is the negative pole piece 302 , the tab 350 can be the negative pole tab 350 .
  • the second end of the tab 350 may be located outside the cell housing 306 .
  • the second end of the tab 350 can be used for setting the connector 353 .
  • the second end of the tab 350 can provide a connector 353 for electrical connection with the circuit board 320 shown in FIG. 1 .
  • the tab 350 can be divided into a first part 3501 , a second part 3502 and a third part 3503 , for example.
  • the first part 3501 may be a part of the tab 350 close to the pole piece (the pole piece includes the positive pole piece 301 and/or the negative pole piece 302 shown in FIG. 2 , hereinafter referred to as the pole piece).
  • the first portion 3501 may be located within the cell housing 306 shown in FIG. 2 .
  • the first part 3501 can be connected to the positive pole piece 301 or the negative pole piece 302 of the battery cell 310 .
  • the first part 3501 may correspond to the first end of the aforementioned tab 350 .
  • the second part 3502 may be a part of the tab 350 close to the circuit board 320 .
  • the second portion 3502 may be located outside the cell housing 306 shown in FIG. 2 .
  • the second portion 3502 can be connected to the circuit board 320 .
  • the second part 3502 may correspond to the second end of the aforementioned tab 350 .
  • the third part 3503 may be connected between the first part 3501 and the second part 3502 . That is to say, the first part 3501 and the second part 3502 can be respectively located at two ends of the third part 3503 .
  • the third part 3503 can be packaged together with the battery case 306 shown in FIG. 2 .
  • the outer periphery of the third portion 3503 may be provided with tab glue 340 around.
  • the third part 3503 can be fixed to the battery case 306 through the tab glue 340 .
  • the tab 350 may include a conductive layer 351 and an insulating tab shell 352 .
  • the insulating tab shell 352 can be wrapped around the outer periphery of the conductive layer 351 . That is to say, the conductive layer 351 can be accommodated in the insulating tab shell 352 .
  • the insulating tab shell 352 may include a first shell opening 3521 and a second shell opening 3522 .
  • the first shell opening 3521 and the second shell opening 3522 may be windows of the insulating tab shell 352 for exposing the conductive layer 351 .
  • the conductive layer 351 can be observed through the first housing opening 3521 and the second housing opening 3522 .
  • the first housing opening 3521 may be located at one end of the insulating lug housing 352 close to the pole piece.
  • the first housing opening 3521 may be disposed at the first portion 3501 of the tab 350 , for example.
  • the portion of the conductive layer 351 exposed from the first shell opening 3521 may be the first connection portion 3511 of the conductive layer 351 .
  • the second housing opening 3522 may be located at one end of the insulating tab housing 352 close to the circuit board 320 .
  • the second shell opening 3522 can be disposed on the second portion 3502 of the tab 350 , for example.
  • the portion of the conductive layer 351 exposed from the second casing opening 3522 may be the second connection portion 3512 of the conductive layer 351 .
  • the second connecting portion 3512 is used to connect with the connector 353 .
  • the connector 353 and the conductive layer 351 can be connected by solder, for example, and the solder can pass through the second shell opening 3522 of the insulating tab shell 352 .
  • the first housing opening 3521 and the second housing opening 3522 may be located on the same surface of the tab 350 . In other embodiments, the first housing opening 3521 and the second housing opening 3522 may be located on different surfaces of the tab 350 .
  • FIG. 24 shows a schematic structural diagram of a conductive layer 351 provided by an embodiment of the present application.
  • the dotted line in FIG. 24 shows the outline of the insulating tab housing 352 .
  • the conductive layer 351 may include a conductive part 3513 , a conductive part 3514 and a conductive part 3515 .
  • the conductive part 3513 may be a part of the conductive layer 351 close to the pole piece.
  • the conductive part 3513 may be located in the cell casing 306 shown in FIG. 2 .
  • the conductive part 3513 may correspond to the first part 3501 of the tab 350 shown in FIG. 22 .
  • the conductive portion 3514 may be a portion of the conductive layer 351 close to the circuit board 320 .
  • the conductive part 3514 may be located outside the cell casing 306 shown in FIG. 2 .
  • the conductive portion 3514 may correspond to the second portion 3502 of the tab 350 shown in FIG. 22 .
  • the conductive part 3515 may be connected between the conductive part 3513 and the conductive part 3514 .
  • the conductive portion 3515 may correspond to the third portion 3503 of the tab 350 . That is, the conductive part 3513 and the conductive part 3514 may be located at both ends of the conductive part 3515 .
  • the pole connector of the battery cell 310 can be electrically connected to the first connection portion 3511 of the tab 350 .
  • FIG. 25 shows a schematic structural diagram of a battery cell 310 provided by an embodiment of the present application.
  • the cell 310 may include a first tab 361 and a second tab 362 , and both the first tab 361 and the second tab 362 may be the tab 350 shown in FIG. 22 .
  • the first connection portion 3611 of the first tab 361 (corresponding to the first connection portion 3511 shown in FIG. 22 ) can be electrically connected to the first pole connection piece 307 of the battery cell 310 through the electrical connection piece 309;
  • the first connection part 3621 (corresponding to the first connection part 3511 shown in FIG. 22 ) can be electrically connected to the second pole connection part 308 of the battery cell 310 through an electrical connection part.
  • the assembly method of the pole piece and the pole lug 350 reference may be made to the embodiments shown in FIG. 8 and FIG. 9 .
  • FIG. 26 shows an exploded view of a battery cell 310 and a circuit board 320 provided in the embodiment of the present application.
  • the circuit board 320 may include a cell protection circuit.
  • the circuit board 320 may be, for example, a cell protection board.
  • the circuit board 320 may be a circuit board for electrical connection with the cell protection board.
  • the circuit board 320 may be, for example, a main board.
  • the circuit board 320 may be electrically connected to the cell protection board through electrical connectors such as solder, conductive glue, and connectors.
  • a connector 313 (corresponding to the connector 353 shown in FIG. 22 ) may be disposed on the second connecting portion 3612 (corresponding to the second connecting portion 3512 shown in FIG. 22 ) of the first tab 361 .
  • a connector 314 (corresponding to the connector 353 shown in FIG. 22 ) may be disposed on the second connecting portion 3622 (corresponding to the second connecting portion 3512 shown in FIG. 22 ) of the second tab 362 .
  • a connector 315 and a connector 316 may be disposed on the circuit board 320 .
  • the connector 315 can be mated with and electrically connected to the connector 313 of the first tab 361 , so that the first tab 361 and the circuit board 320 can be electrically connected through the connector 313 and the connector 315 .
  • the connector 316 can be mated with and electrically connected to the connector 314 of the second tab 362 , so that the second tab 362 and the circuit board 320 can be electrically connected through the connector 314 and the connector 316 .
  • FIG. 27 is a schematic structural diagram of a battery cell 310 provided in an embodiment of the present application.
  • FIG. 28 shows a schematic structural diagram of a battery cell 310 provided by an embodiment of the present application.
  • the battery cell 310 may include a first tab 361 and a second tab 362 .
  • the first tab 361 and the second tab 362 may be electrically connected to the first pole connector 307 and the second pole connector 308 of the battery cell 310 respectively.
  • the first tab 361 may include a connector 313
  • the second tab 362 may include a connector 314 .
  • a connector 315 and a connector 316 may be disposed on the circuit board 320 .
  • the connector 313 can be electrically connected with the connector 315 .
  • Connector 314 may be electrically connected to connector 316 .
  • the battery protection circuit of the electronic device 100 can be electrically connected to one of the positive pole and the negative pole of the battery cell 310 through the circuit on the circuit board 320, the connector 315, and the connector 313 of the first tab 361;
  • the protection circuit can also be electrically connected to the other of the positive pole and the negative pole of the battery cell 310 through the circuit on the circuit board 320 , the connector 316 , and the connector 314 of the second tab 362 .
  • the battery cell 310 may further include a third tab 363 .
  • the first connecting portion 3631 of the third tab 363 (corresponding to the first connecting portion 3511 shown in FIG. 22 ) can be in contact with the electrolyte of the battery cell 310, thus, the third tab 363 can act as a The reference electrode of the cell 310 .
  • a connector 317 may be disposed on the third tab 363 .
  • the structure of the third tab 363 may correspond to the tab 350 shown in FIG. 22 .
  • the structure of the connector 317 may correspond to the connector 353 shown in FIG. 22 .
  • a connector 318 may also be provided on the circuit board 320 .
  • the connector 317 of the third tab 363 can be electrically connected to the connector 318 .
  • the cell protection circuit of the electronic device 100 can be electrically connected to the reference electrode of the cell 310 through the circuit on the circuit board 320 , the connector 318 , and the connector 317 of the third tab 363 .

Abstract

La présente invention concerne un ensemble languette, un élément, une batterie et un dispositif électronique. Selon l'ensemble languette, une languette positive, une languette négative, et une couche isolante sont empilées, la couche isolante comporte des ouvertures pour exposer la languette positive et/ou la languette négative, et chaque ouverture exposant uniquement l'une de la languette positive et de la languette négative, de telle sorte qu'un connecteur ayant une pluralité d'orifices peut être disposé sur l'ensemble languette. L'ensemble languette et une carte de circuit imprimé sont connectés électriquement au moyen du connecteur, de telle sorte que l'ensemble languette et la carte de circuit imprimé peuvent être électriquement connectés de façon stable, et dans une scène de maintenance ou similaire, la relation de connexion électrique entre l'ensemble languette et la carte de circuit imprimé peut être facilement libérée.
PCT/CN2022/120209 2021-10-21 2022-09-21 Ensemble languette, élément, batterie et dispositif électronique WO2023065943A1 (fr)

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CN202111225000 2021-10-21
CN202210611751.1 2022-05-31
CN202210611751.1A CN116014373A (zh) 2021-10-21 2022-05-31 极耳组件、电芯、电池、电子设备

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018186250A (ja) * 2017-04-27 2018-11-22 セイコーインスツル株式会社 電気化学セル
CN211789211U (zh) * 2020-05-19 2020-10-27 广东前程动力科技有限公司 一种电池模组
CN213636220U (zh) * 2020-12-22 2021-07-06 东莞新能德科技有限公司 电池及电子装置
CN214254662U (zh) * 2021-03-01 2021-09-21 东莞新能德科技有限公司 电池组件及电子装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018186250A (ja) * 2017-04-27 2018-11-22 セイコーインスツル株式会社 電気化学セル
CN211789211U (zh) * 2020-05-19 2020-10-27 广东前程动力科技有限公司 一种电池模组
CN213636220U (zh) * 2020-12-22 2021-07-06 东莞新能德科技有限公司 电池及电子装置
CN214254662U (zh) * 2021-03-01 2021-09-21 东莞新能德科技有限公司 电池组件及电子装置

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