WO2023070970A1 - 端盖组件、电池单体、电池及用电装置 - Google Patents

端盖组件、电池单体、电池及用电装置 Download PDF

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Publication number
WO2023070970A1
WO2023070970A1 PCT/CN2022/073581 CN2022073581W WO2023070970A1 WO 2023070970 A1 WO2023070970 A1 WO 2023070970A1 CN 2022073581 W CN2022073581 W CN 2022073581W WO 2023070970 A1 WO2023070970 A1 WO 2023070970A1
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WO
WIPO (PCT)
Prior art keywords
end cover
spacer
pole
main body
end cap
Prior art date
Application number
PCT/CN2022/073581
Other languages
English (en)
French (fr)
Inventor
许虎
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to CN202280010075.0A priority Critical patent/CN116762215A/zh
Priority to EP22884889.1A priority patent/EP4318751A1/en
Publication of WO2023070970A1 publication Critical patent/WO2023070970A1/zh
Priority to US18/234,385 priority patent/US20240006695A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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 field of battery technology, in particular, to an end cover assembly, a battery cell, a battery and an electrical device.
  • Lithium-ion batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide application range, and small self-discharge coefficient. An important part of.
  • the battery cell of a lithium-ion battery is assembled into an electrode assembly (bare cell) by winding or laminating the positive pole piece, the negative pole piece and the diaphragm, and then put into the case, then cover the end cap, and finally inject electrolytic obtained after liquid.
  • higher requirements are placed on the safety performance and cycle life of lithium-ion batteries.
  • the battery cells in the existing batteries are extremely prone to short circuit or shell corrosion during later use, which leads to a relatively large safety hazard in the battery, which is not conducive to the safety of consumers.
  • Embodiments of the present application provide an end cover assembly, a battery cell, a battery and an electrical device, which can effectively reduce potential safety hazards of the battery during use.
  • the embodiment of the present application provides an end cap assembly, including an end cap, a pole, a first spacer, a second spacer, and an insulator;
  • the end cap is provided with a mounting hole, and the mounting hole is along the thickness direction of the end cap through the end cover;
  • the pole is used for electrical connection with the electrode assembly, and the pole includes a main body section pierced in the installation hole; along the thickness direction of the end cover, the first spacer and the second spacer are respectively arranged on the two sides of the end cover On the side, the first spacer and the second spacer are used to cooperate with the insulating isolation end cap and the pole;
  • the insulating piece covers the main body section along the circumference of the main body section, and the insulating piece is configured to block the main body section from entering the installation hole
  • the conductive medium is in contact; wherein, along the thickness direction of the end cap, the first spacer and the second spacer form a gap at a position opposite to the mounting hole, and both ends of the insul
  • the first spacer and the second spacer are respectively provided on both sides of the end cap, so that the first spacer and the second spacer can cooperate with the insulating isolation end cap and pole, because the first spacer A gap is formed at the position corresponding to the mounting hole of the second spacer, so that the end cover assembly will form conductive crystals after the electrolyte enters the gap, so that it passes through the outer periphery of the main body section of the pole.
  • the side covers the insulator, and both ends of the insulator exceed the gap, so that the insulator can effectively insulate the isolated pole and the crystal formed by the electrolyte in the gap, and the insulator can also insulate the isolated pole and the mounting hole.
  • the burrs formed on the hole wall during processing can effectively reduce the phenomenon of current conduction between the pole and the end cover, which is conducive to reducing the risk of short circuit in the battery cell with this end cover assembly, and can effectively reduce the terminal There is a potential safety hazard of electrical corrosion on the end cap of the cap assembly or the casing of the battery cell.
  • the first spacer has a spacer extending into the mounting hole, and the spacer is used to insulate and isolate the end cover from the main body section; along the thickness direction of the end cover, the spacer forms a gap with the second spacer.
  • the isolation part is provided on the first spacer, and the isolation part extends into the installation hole, that is to say, the isolation part is located between the main body section of the pole and the hole wall of the installation hole, thereby improving
  • the effect of the first spacer insulating and isolating the main body section of the pole and the hole wall of the installation hole is beneficial to reducing the size of the gap formed between the first spacer and the second spacer, thereby further reducing the distance between the pole and the terminal. Risk of current conduction between the covers.
  • the end cap along the thickness direction of the end cap, has an opposite first side and a second side, and the second side is used to face the electrode assembly;
  • the end cap assembly further includes a connecting piece, the connecting piece is connected to the pole and Located on the first side, along the thickness direction of the end cover, at least part of the first spacer is located between the connecting piece and the end cover to insulate and isolate the connecting piece and the end cover; wherein, along the thickness direction of the end cover, the connecting piece has a As for the first abutting surface abutting against the first spacer, the insulator has a first end protruding from the first side, and the first abutting surface is closer to the end cover than the first end.
  • a connecting piece is provided on the first side of the end cover, and the connecting piece is connected to the pole so that the pole can be fixed on the end cover through the connecting piece.
  • the pole further includes a first connecting section; the first connecting section is connected to the main body section and is located on the first side, and the first connecting section is configured to press the connecting piece to the first spacer.
  • the pole has a first connecting section located on the first side of the end cap, through which the connecting piece can be pressed against the first separator, so that the pole can be fastened by the connecting piece On the end cover to improve the stability and reliability of the installation of the pole.
  • the pole further includes a second connection section; the second connection section is connected to the main body section and is located on the second side, the second connection section is used for electrical connection with the electrode assembly, along the thickness direction of the end cap, the second At least part of the spacer is located between the second connection section and the end cover to insulate and isolate the second connection section and the end cover; wherein, along the thickness direction of the end cover, the second spacer has a structure for abutting against the second connection section The second abutting surface, the insulator has a second end protruding from the second side, and the second abutting surface is closer to the end cover than the second end.
  • the pole has a second connection section located on the second side of the end cover, and the second connection section is abutted against the second side of the end cover through the second spacer, so that the second connection section can
  • the pole is fixed on the end cover, and the second spacer can effectively isolate the second connection section from the second side of the end cover.
  • the end cover assembly further includes a sealing element; the sealing element is sleeved on the outside of the insulating element, and the sealing element is located in the installation hole, and the sealing element is used to seal the isolation part and the second isolation element.
  • the sealing element can improve the sealing effect between the isolation part of the first isolation element and the second isolation element, so as to reduce the risk of electrolyte infiltration.
  • the outer peripheral surface of the main body section is provided with an annular groove extending along the circumferential direction of the main body section, and the annular groove is used for accommodating the insulator.
  • this structure can limit the insulator to a certain extent on the one hand, so as to reduce the number of insulators. Relative to the main body section, there is a phenomenon of movement, and on the other hand, it can also play a certain role in positioning the insulating part, so that it is convenient to install the insulating part during the production process.
  • the outer peripheral surface of the insulator does not exceed the outer peripheral surface of the main body segment.
  • the insulation has a thickness of 0.005mm-1.5mm.
  • the thickness of the insulating member between 0.005 millimeters and 1.5 millimeters, the risk of poor insulation effect caused by the thickness of the insulating member being too thin can be reduced, and the risk of poor insulation caused by the thickness of the insulating member being too thin can be alleviated. It is thick and occupies the space of the pole, so as to cause the phenomenon that the conduction capacity of the pole is insufficient.
  • the insulating element is an insulating film sleeved on the outside of the main body section.
  • the insulation is an insulation layer applied to the outer surface of the body section.
  • the insulating member is an insulating layer formed by physical and chemical reactions on the outer surface of the pole.
  • the embodiment of the present application also provides a battery cell, including an electrode assembly, a casing, and the above-mentioned end cap assembly; the casing has an opening, and the casing is used to accommodate the electrode assembly; the end cap is used to cover the opening, The pole is electrically connected with the electrode assembly.
  • the embodiment of the present application further provides a battery, including a box body and the above-mentioned battery cells; the box body is used for accommodating the battery cells.
  • the embodiment of the present application further provides an electric device, including the above-mentioned battery.
  • the embodiment of the present application also provides a method for manufacturing an end cap assembly, including: providing an end cap, the end cap is provided with a mounting hole, and the mounting hole penetrates the end cap along the thickness direction of the end cap; Including the main body section; providing an insulating piece; providing a first spacer and a second spacer; wrapping the insulating piece on the main body section along the circumference of the main body section; inserting the pole into the installation hole so that the main body section passes through In the installation hole; the first spacer and the second spacer are respectively arranged on both sides of the end cover, so that the first spacer and the second spacer are used to cooperate with the insulation isolation end cover and the pole; wherein, along the end In the thickness direction of the cover, the first spacer and the second spacer form a gap at the position opposite to the installation hole, both ends of the insulation are beyond the gap, and the insulation is configured to block the main body section and the conductive medium entering the installation hole touch.
  • the embodiment of the present application also provides a manufacturing equipment for an end cap assembly, including a first providing device, a second providing device, a third providing device, a fourth providing device, a first assembling device, a second assembling device and The third assembly device;
  • the first providing device is used to provide the end cover, the end cover is provided with a mounting hole, and the installation hole penetrates the end cover along the thickness direction of the end cover;
  • the second providing device is used to provide the pole, and the pole includes a main body section;
  • the third providing device is used to provide the insulating member;
  • the fourth providing device is used to provide the first spacer and the second spacer;
  • the first assembling device is used to wrap the insulating member on the main body section along the circumferential direction of the main body section;
  • the second The assembly device is used to insert the pole into the installation hole, so that the main body section passes through the installation hole;
  • the third assembly device is used to respectively arrange the first spacer and the second spacer on both sides of the end cover
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is an exploded view of the structure of the battery provided by some embodiments of the present application.
  • FIG. 3 is an exploded view of the structure of a battery cell provided by some embodiments of the present application.
  • Fig. 4 is a schematic structural diagram of an end cap assembly provided by some embodiments of the present application.
  • Figure 5 is an exploded view of the structure of the end cap assembly provided by some embodiments of the present application.
  • FIG. 6 is a cross-sectional view of an end cap assembly provided by some embodiments of the present application.
  • Fig. 7 is a partial enlarged view of A of the end cap assembly shown in Fig. 6;
  • Fig. 8 is a schematic diagram of connection between poles and insulators provided by some embodiments of the present application.
  • Fig. 9 is a schematic structural diagram of poles provided by some embodiments of the present application.
  • Fig. 10 is a schematic flow chart of the manufacturing method of the end cap assembly provided by some embodiments of the present application.
  • Fig. 11 is a schematic block diagram of manufacturing equipment for an end cap assembly provided by some embodiments of the present application.
  • Icons 1000-vehicle; 100-battery; 10-box; 11-first part; 12-second part; 20-battery unit; 21-electrode assembly; 211-lug; 22-housing; 221-opening 23-end cover assembly; 231-end cover; 2311-installation hole; 2312-first side; 2313-second side; 232-pole; 2324-annular groove; 233-first spacer; 2331-isolator; 2332-extension; 234-second spacer; 2341-second abutment surface; 235-insulator; 236-gap; 237 -pressure relief mechanism; 238-connecting piece; 2381-first abutment surface; 239-seal; 200-controller; 300-motor; 2000-manufacturing equipment; 2100-first providing device; 2200-second providing device 2300-the third providing device; 2400-the fourth providing device; 2500-the first assembling device; 2600-the second assembling device; 2700-the third assembling device
  • connection In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms “installation”, “connection”, “connection” and “attachment” should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.
  • “Plurality” in this application refers to two or more (including two).
  • the battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application.
  • the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
  • the battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery module or a battery pack, and the like.
  • a battery generally includes a case for enclosing one or more battery cells or a plurality of battery modules. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • the battery cell includes a casing, an electrode assembly and an electrolyte, and the casing is used to accommodate the electrode assembly and the electrolyte.
  • the electrode assembly consists of a positive pole piece, a negative pole piece and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative pole pieces.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the positive electrode collector without the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. Fluid, the positive electrode current collector not coated with the positive electrode active material layer is used as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the negative electrode collector without the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. Fluid, the negative electrode current collector not coated with the negative electrode active material layer is used as the negative electrode tab.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current is passed without fusing, the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together.
  • the material of the isolation film may be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
  • the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.
  • Lithium-ion batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide application range, and small self-discharge coefficient. An important part of.
  • the battery cell of a lithium-ion battery is assembled into an electrode assembly (bare cell) by winding or laminating the positive pole piece, the negative pole piece and the diaphragm, and then put into the case, then cover the end cap, and finally inject electrolytic obtained after liquid.
  • higher requirements are placed on the safety performance and cycle life of lithium-ion batteries.
  • the battery cell is usually provided with a mounting hole on the end cover, and the pole is riveted on the end cover after passing through the mounting hole, and the pole and the pole are accommodated in the
  • the electrode assemblies in the casing are electrically connected so that the pole serves as the positive output pole or the negative output pole of the battery cell, so as to realize the output and output of the electric energy of the battery cell.
  • the upper plastic and the lower plastic are usually arranged on both sides of the end cover, and the upper plastic
  • the part of the plastic or the lower plastic extends between the hole wall of the installation hole and the pole, so as to realize the insulation isolation between the pole and the end cover.
  • the electrolyte will penetrate to the upper surface when the battery cell is polluted by the external electrolyte.
  • Conductive crystals are formed in the gap between the plastic and the end cap and between the upper plastic and the lower plastic, resulting in the phenomenon of current conduction between the pole and the end cap, which makes the end cap and the shell of the battery cell charged , and then it is very easy to cause a short circuit in the later use of the battery cell or an electrical corrosion phenomenon in the shell, which will lead to a large safety hazard in the battery cell, which is not conducive to the safety of consumers, and is not conducive to improving the battery cell. cycle life of the body.
  • the end cover assembly includes an end cover, a pole A post, a first spacer, a second spacer, and an insulator.
  • the end cover is provided with installation holes, and the installation holes penetrate both sides of the end cover along the thickness direction of the end cover.
  • the pole has a main body segment inserted into the installation hole.
  • the first spacer and the second spacer are respectively arranged on both sides of the end cover along the thickness direction of the end cover.
  • the first spacer and the second spacer are used to cooperate with the insulation isolation end cover and pole, along the thickness direction of the end cover , the first spacer and the second spacer form a gap at a position opposite to the mounting hole.
  • the insulator is wrapped around the outer peripheral side of the main body section, and both ends of the insulator are beyond the gap, and the insulator is configured to prevent the main body section from contacting the conductive medium entering the installation hole.
  • a first spacer and a second spacer are respectively provided on both sides of the end cover, so that the first spacer and the second spacer can cooperate to insulate and isolate the end cover and the pole. Since the first spacer and the second spacer form a gap at the position corresponding to the mounting hole, the end cover assembly will form a conductive crystal after the electrolyte enters into the gap after being polluted by the electrolyte.
  • the outer peripheral side of the main body section of the pole is covered with an insulator, and both ends of the insulator are beyond the gap, so that the insulator can effectively insulate and isolate the pole and the crystal formed by the electrolyte in the gap, and the insulator can also insulate
  • the burrs formed during the processing of the wall of the isolation pole and the mounting hole can effectively reduce the phenomenon of current conduction between the pole and the end cover, which is conducive to reducing the short circuit of the battery cell with this end cover assembly. risk, and can effectively reduce the potential safety hazard of electrical corrosion in the end cover of the end cover assembly or the casing of the battery cell.
  • the end cap assembly disclosed in the embodiments of the present application can be used in electric devices such as vehicles, ships or aircrafts, but not limited to.
  • the power supply system comprising the electric device can be composed of the end cover assembly disclosed in this application, the battery cell, etc., so that it is beneficial to alleviate the phenomenon of short circuit or electric corrosion of the battery cell, so as to improve the service life and safety of the battery cell sex.
  • the embodiment of the present application provides an electric device using a battery as a power source.
  • the electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • a vehicle 1000 as an electric device according to an embodiment of the present application is taken as an example for description.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 .
  • the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 .
  • the vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .
  • the battery 100 can be used not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000.
  • FIG. 2 is an exploded view of the structure of the battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a box body 10 and a battery cell 20 , and the box body 10 is used to accommodate the battery cell 20 .
  • the box body 10 is used to provide an assembly space for the battery cells 20 , and the box body 10 may adopt various structures.
  • the box body 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, the first part 11 and the second part 12 jointly define a assembly space.
  • the second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define an assembly space
  • the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 is covered by the open side of the second part 12 .
  • the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid and the like.
  • the battery 100 there may be one or a plurality of battery cells 20 .
  • the multiple battery cells 20 can be connected in series, in parallel or in parallel.
  • the mixed connection means that the multiple battery cells 20 are connected in series and in parallel.
  • a plurality of battery cells 20 can be directly connected in series, in parallel or mixed together, and then the whole composed of a plurality of battery cells 20 is housed in the box 10; of course, the battery 100 can also be a plurality of battery cells 20
  • the battery modules are firstly connected in series or parallel or in combination, and then multiple battery modules are connected in series or in parallel or in combination to form a whole, which is accommodated in the case 10 .
  • the battery 100 may also include other structures, for example, the battery 100 may also include a bus component for realizing electrical connection between multiple battery cells 20 .
  • each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto.
  • the battery cell 20 may be in the form of a cylinder, a flat body, a cuboid or other shapes.
  • FIG. 3 is an exploded view of the structure of the battery cell 20 provided by some embodiments of the present application.
  • the battery cell 20 includes an electrode assembly 21 , a casing 22 and an end cap assembly 23 , the casing 22 has an opening 221 , the casing 22 is used to accommodate the electrode assembly 21 , and the end cap assembly 23 is used to cover the opening 221 of the casing 22 , and the end cap assembly 23 is used to electrically connect with the electrode assembly 21 .
  • the electrode assembly 21 is a part of the electrochemical reaction in the battery cell 20.
  • the end of the electrode assembly 21 facing the end cap assembly 23 is formed with a tab 211.
  • the tab 211 is used to electrically connect with the end cap assembly 23 to realize the battery cell. 20 electrical energy input or output.
  • the electrode assembly 21 may include a positive electrode tab, a negative electrode tab, and a separator.
  • the electrode assembly 21 may be a coiled structure formed by winding a positive pole piece, a separator and a negative pole piece, or a laminated structure formed by stacking a positive pole piece, a separator and a negative pole piece.
  • the electrode assembly 21 is a wound structure formed by winding a positive pole piece, a separator, and a negative pole piece.
  • the housing 22 can also be used to accommodate electrolyte, such as electrolyte.
  • the housing 22 can be in various structural forms.
  • the housing 22 may also be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, and the like.
  • the casing 22 is a hollow structure with an opening 221 on one side, and the end cap assembly 23 covers the opening 221 of the casing 22 to form a sealed connection to form a sealed space for accommodating the electrode assembly 21 and the electrolyte.
  • the electrode assembly 21 can be put into the casing 22 first, and electrolyte is filled into the casing 22 , and then the end cap assembly 23 is covered on the opening 221 of the casing 22 .
  • the housing 22 can be in various shapes, such as cylinder, cuboid and so on.
  • the shape of the casing 22 can be determined according to the specific shape of the electrode assembly 21 . For example, if the electrode assembly 21 has a cylindrical structure, a cylindrical casing can be selected; if the electrode assembly 21 has a rectangular parallelepiped structure, a rectangular parallelepiped casing can be selected.
  • the end cover assembly 23 may also have various structures.
  • the shape of the end cover assembly 23 can be adapted to the shape of the housing 22 , for example, the end cover assembly 23 is a plate-shaped structure, a hollow structure with an opening 221 at one end, and the like. Exemplarily, in FIG. 3 , the electrode assembly 21 has a cylindrical structure, and the casing 22 has a cylindrical structure, and the end cap assembly 23 covers the opening 221 of the casing 22 .
  • the battery cell 20 is not limited to the above-mentioned structure, and the battery cell 20 can also have other structures.
  • the battery cell 20 includes a casing 22 and two end cap assemblies 23, and the casing 22 is opposite With the hollow structure of the openings 221 on both sides, one end cap assembly 23 is correspondingly covered with one opening 221 of the casing 22 to form a sealed connection, so as to form a sealed space for accommodating the electrode assembly 21 and the electrolyte.
  • the end cover assembly 23 is an assembly that covers the opening 221 of the casing 22 to isolate the internal environment of the battery cell 20 from the external environment.
  • FIG. 3 An exploded view of the structure of the end cap assembly 23 provided in the example, and FIG. 6 is a cross-sectional view of the end cap assembly 23 provided in some embodiments of the present application.
  • the present application provides an end cover assembly 23 , and the end cover assembly 23 includes an end cover 231 , a pole 232 , a first spacer 233 , a second spacer 234 and an insulation 235 .
  • the end cover 231 defines an installation hole 2311 , and the installation hole 2311 penetrates the end cover 231 along the thickness direction of the end cover 231 .
  • the pole 232 is used for electrical connection with the electrode assembly 21 , and the pole 232 includes a main body section 2321 passing through the installation hole 2311 .
  • the first spacer 233 and the second spacer 234 are respectively arranged on both sides of the end cover 231, and the first spacer 233 and the second spacer 234 are used to cooperate with the insulation isolation end cover 231 and the pole.
  • the insulator 235 covers the main body section 2321 along the circumference of the main body section 2321 , and the insulator 235 is configured to prevent the main body section 2321 from contacting the conductive medium entering the installation hole 2311 .
  • the first spacer 233 and the second spacer 234 form a gap 236 at a position opposite to the installation hole 2311 , and both ends of the insulating part 235 exceed the gap 236 .
  • the main body section 2321 passes through the installation hole 2311 , that is, part of the main body section 2321 is located in the installation hole 2311 , and both ends of the main body section 2321 extend out of the installation hole 2311 .
  • Both ends of the insulator 235 are beyond the gap 236, that is, along the thickness direction of the end cover 231, and at the position corresponding to the mounting hole 2311, the first spacer 233 has a first surface opposite to the second spacer 234,
  • the second spacer 234 has a second surface opposite to the first surface, the insulator 235 is correspondingly arranged at the gap 236, and the two ends of the insulator 235 respectively exceed the first surface and the second surface, that is to say, in the pole In the radial direction of pole 232 , the position of the main body section 2321 of pole 232 corresponding to the gap 236 is covered with insulator 235 , and the gap 236 is located within the projection of insulator 235 in the radial direction of pole 232 .
  • the insulator 235 is configured to prevent the main body segment 2321 from contacting the conductive medium entering the mounting hole 2311.
  • the conductive medium may be a conductive crystal formed after the electrolyte penetrates into the gap 236, or may be the process of the mounting hole 2311. Burrs or metal wires formed on the hole wall during the process.
  • the pole 232 is used to connect with the pole lug 211 of the electrode assembly 21 (it may be a positive pole lug or a negative pole pole), so that an electrical connection is formed between the pole pole 232 and the electrode assembly 21, thereby passing through the pole pole 232 can realize the input and output of electric energy of the battery cell 20 .
  • the pole 232 can be directly connected to the pole 211 of the electrode assembly 21, such as welding or abutting, etc.; it can also be indirectly connected to the pole 211 of the electrode assembly 21 through other components, such as the pole 232
  • the connecting piece is connected to the tab 211 of the electrode assembly 21 , that is, the connecting piece is first welded or abutted against the tab 211 of the electrode assembly 21 , and then welded or abutted against the pole 232 .
  • both poles 232 are connected to the tabs 211 of the electrode assembly 21 , so as to simultaneously form the positive output pole or the negative output pole of the battery cell 20 through the two poles 232 .
  • Both poles 232 are coated with insulators 235 .
  • two installation holes 2311 are provided at corresponding positions on the end cover 231 , and the installation holes 2311 are corresponding to the poles 232 .
  • the pole 232 can be made of various materials, for example, copper, iron, aluminum, steel, aluminum alloy and so on.
  • first spacer 233 and the second spacer 234 are the upper plastic and the lower plastic of the end cap assembly 23 respectively.
  • the specific structures of the first isolator 233 and the second isolator 234 can refer to related technologies, and will not be repeated here.
  • the end cap assembly 23 may further include a pressure relief mechanism 237 installed on the end cap 231 .
  • the pressure relief mechanism 237 is used to release the pressure inside the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a predetermined value.
  • the pressure relief mechanism 237 may be a component such as an explosion-proof valve, a burst disk, an air valve, a pressure relief valve, or a safety valve.
  • Both sides of the end cover 231 are respectively provided with a first spacer 233 and a second spacer 234, so that the first spacer 233 and the second spacer 234 can cooperate with the insulation isolation end cap 231 and the pole 232, due to the first spacer
  • the part 233 and the second spacer 234 form a gap 236 at the position corresponding to the mounting hole 2311, so that the end cover assembly 23 is polluted by the electrolyte, and after the electrolyte enters the gap 236, a conductive crystal will be formed, thereby passing through the
  • the outer peripheral side of the main body section 2321 of the pole 232 covers the insulator 235, and both ends of the insulator 235 exceed the gap 236, so that the insulator 235 can effectively insulate and isolate the pole 232 and the gap formed by the electrolyte at the gap 236.
  • Crystallization, and the insulator 235 can also insulate the burrs formed during the processing of the isolation pole 232 and the wall of the mounting hole 2311, thereby effectively reducing the phenomenon of current conduction between the pole 232 and the end cover 231, which is beneficial to reduce
  • the battery cell 20 with the end cap assembly 23 has the risk of short circuit, and can effectively reduce the potential safety hazard of electrical corrosion in the end cap 231 of the end cap assembly 23 or the casing 22 of the battery cell 20 .
  • FIG. 7 is a partially enlarged view of A of the end cap assembly 23 shown in FIG. 6 .
  • the first isolation member 233 has an isolation portion 2331 extending into the installation hole 2311 , and the isolation portion 2331 is used for insulating the isolation end cap 231 from the main body section 2321 .
  • the spacer 2331 and the second spacer 234 form a gap 236 .
  • the isolation part 2331 of the first spacer 233 extends into the installation hole 2311 and is used for insulating the isolation end cover 231 and the main body section 2321, that is, the isolation part 2331 is located between the main body section 2321 of the pole 232 and the hole wall of the installation hole 2311 space, so that the isolation part 2331 can insulate and isolate the end cap 231 and the main body section 2321 .
  • the isolation portion 2331 can also be disposed on the second isolation member 234 , and the isolation portion 2331 extends between the pole 232 and the hole wall of the installation hole 2311 .
  • a gap 236 is formed between the isolation portion 2331 and the first isolation member 233 .
  • the structure of the end cover assembly 23 is not limited thereto.
  • the first spacer 233 and the second spacer 234 can also be provided with a spacer 2331, and the spacer 2331 extends to the hole of the pole 232 and the installation hole 2311. between walls.
  • a gap 236 is formed between the isolation portion 2331 of the first isolation member 233 and the isolation portion 2331 of the second isolation member 234 .
  • the isolation part 2331 By setting the isolation part 2331 on the first spacer 233, and the isolation part 2331 extends into the installation hole 2311, the effect of the first spacer 233 insulating the main body section 2321 of the isolation pole 232 from the wall of the installation hole 2311 can be improved. , and is beneficial to reduce the size of the gap 236 formed between the first spacer 233 and the second spacer 234 , thereby further reducing the risk of current conduction between the pole 232 and the end cover 231 .
  • Electrode assembly 21 The end cover assembly 23 further includes a connecting piece 238, the connecting piece 238 is connected to the pole 232 and located on the first side 2312, along the thickness direction of the end cover 231, at least part of the first spacer 233 is located between the connecting piece 238 and the end cover 231 space, to insulate the connector 238 and the end cover 231.
  • the connecting member 238 has a first abutting surface 2381 for abutting against the first spacer 233, the insulating member 235 has a first end protruding from the first side 2312, the first The abutting surface 2381 is closer to the end cover 231 than the first end.
  • the second side 2313 of the end cover 231 is used to face the electrode assembly 21 , that is, when the end cover assembly 23 is covered with the opening 221 of the housing 22 , the second side 2313 of the end cover 231 is used to face the inside of the housing 22 , that is to say, the first side 2312 of the end cover 231 is the side facing away from the inside of the casing 22 , that is, the outside of the battery cell 20 .
  • connection block is a riveting block, so that the pole 232 can be riveted to the end cover 231 through the riveting block.
  • the first spacer 233 further has an extension 2332 , the extension 2332 extends along the thickness direction of the end cover 231 in a direction away from the end cover 231 , and the extension 2332 is along the connecting piece.
  • 238 is a ring structure extending circumferentially so that the extension 2332 covers the outer peripheral side of the connecting piece 238 along the circumferential direction of the connecting piece 238, which is beneficial to improve the insulation of the first spacer 233 from the end cover 231 and the connecting piece 238. effect, so as to reduce the risk of current conduction between the end cap 231 and the connecting piece 238 .
  • the connecting piece 238 is disposed on the first side 2312 of the end cover 231 , and the connecting piece 238 is connected to the pole 232 so that the pole 232 can be fixed on the end cover 231 through the connecting piece 238 .
  • the connecting piece 238 is connected to the pole 232 so that the pole 232 can be fixed on the end cover 231 through the connecting piece 238 .
  • the pole 232 further includes a first connection section 2322 .
  • the first connection section 2322 is connected to the main body section 2321 and located on the first side 2312 , and the first connection section 2322 is configured to press the connection part 238 to the first isolation part 233 .
  • the first connecting section 2322 is connected to one end of the main body section 2321 protruding from the first side 2312 of the end cover 231, and the radial dimension of the first connecting section 2322 is larger than the main section 2321, so that the first connecting section 2322 can press
  • the pole 232 is riveted to the end cover 231 .
  • the pole 232 has a first connecting section 2322 located on the first side 2312 of the end cover 231, through which the connecting piece 238 can be pressed against the first spacer 233, so that the pole 232 can pass through the connecting piece 238 is fastened on the end cover 231 to improve the installation stability and reliability of the pole 232 .
  • the pole 232 further includes a second connection section 2323 .
  • the second connection section 2323 is connected to the main body section 2321 and is located on the second side 2313.
  • the second connection section 2323 is used for electrical connection with the electrode assembly 21.
  • at least part of the second separator 234 is located on the second side.
  • the connection section 2323 and the end cover 231 are isolated by insulation.
  • the second spacer 234 has a second abutting surface 2341 for abutting against the second connecting section 2323, the insulating member 235 has a second end protruding from the second side 2313, The second abutting surface 2341 is closer to the end cover 231 than the second end.
  • the second spacer 234 is located between the second connection section 2323 and the end cover 231, and the second spacer 234 has a first part for abutting against the second connection section 2323.
  • the second abutment surface 2341 that is, the second connection section 2323 abuts against the second side 2313 of the end cover 231 through the second spacer 234, so that the second connection section 2323 can cooperate with the first connection section 2322 and the connection piece 238 to connect the poles.
  • the column 232 is fastened on the end cap 231 .
  • the pole 232 has a second connection section 2323 located on the second side 2313 of the end cover 231, and the second connection section 2323 is abutted against the second side 2313 of the end cover 231 through the second spacer 234, thereby passing through the second connection
  • the section 2323 can fix the pole 232 on the end cover 231 , and enable the second spacer 234 to effectively isolate the second connection section 2323 from the second side 2313 of the end cover 231 .
  • the end cap assembly 23 further includes a seal 239 .
  • the sealing member 239 is sleeved on the outer side of the insulating member 235 , and the sealing member 239 is located in the installation hole 2311 .
  • the sealing member 239 is used for sealing the isolation portion 2331 and the second isolation member 234 .
  • the sealing member 239 is sleeved on the outside of the insulating member 235, and the sealing member 239 is located in the installation hole 2311, that is, the sealing member 239 is located between the main body section 2321 of the pole 232 and the hole wall of the installation hole 2311, and along the end cover In the thickness direction of the first isolator 231 , the sealing member 239 is located in the gap 236 formed between the isolation portion 2331 of the first isolator 233 and the second isolator 234 .
  • the sealing member 239 is a sealing ring, and the material of the sealing member 239 may be plastic, silicone or rubber.
  • the sealing member 239 is sleeved on the outside of the insulating member 235, and the sealing member 239 and the insulating member 235 can be of an integrated structure or a split structure, that is, the sealing member 239 and the insulating member 235 can be integrally formed
  • the structures made by the process can also be independent of each other, and the sealing member 239 is sleeved on the outer peripheral side of the insulating member 235 .
  • the sealing member 239 and the insulating member 235 are in a separate structure.
  • the sealing member 239 is provided so as to improve the sealing effect between the isolation portion 2331 of the first isolation member 233 and the second isolation member 234 to reduce the risk of electrolyte infiltration.
  • FIG. 7 refers to FIG. 7 , and please refer further to FIGS. 8 and 9 .
  • An annular groove 2324 extending along the circumferential direction of the main body section 2321 is defined on the outer peripheral surface of the main body section 2321 , and the annular groove 2324 is used for accommodating the insulator 235 .
  • this structure can limit the insulator 235 to a certain extent on the one hand, so as to reduce the number of insulators 235. Relative to the main body section 2321, there is a movement phenomenon, and on the other hand, it can also play a certain role in positioning the insulating member 235, so that the insulating member 235 can be easily installed during the production process.
  • the outer peripheral surface of the insulator 235 does not exceed the outer peripheral surface of the main body section 2321 .
  • the outer peripheral surface of the insulator 235 does not exceed the outer peripheral surface of the main body section 2321 , that is, in the radial direction of the pole 232 , the insulator 235 is completely accommodated in the annular groove 2324 .
  • the insulating member 235 By setting the outer peripheral surface of the insulating member 235 not to exceed the outer peripheral surface of the main body section 2321 , the insulating member 235 can be better protected.
  • the thickness of the insulating member 235 is 0.005mm-1.5mm.
  • the thickness of the insulating member 235 By setting the thickness of the insulating member 235 between 0.005 millimeters and 1.5 millimeters, the risk of poor insulation effect due to the thickness of the insulating member 235 being too thin can be reduced, and the occupancy due to the thickness of the insulating member 235 being too thick can be alleviated.
  • the space of the pole 232 may cause the phenomenon that the conduction capacity of the pole 232 is insufficient.
  • the insulating member 235 is an insulating film sleeved on the outside of the main body section 2321 .
  • the insulating film can be coated on the main body section 2321 of the pole 232 by pasting or hot melting.
  • the material of the insulating film may be one or more of polyimide, polyethylene, polyvinylidene fluoride, or polytetrafluoroethylene.
  • the insulating member 235 is an insulating layer coated on the outer surface of the main body section 2321 .
  • the insulating layer is an insulating coating formed on the outer peripheral side of the pole 232 by spraying, and the material of the insulating layer may be epoxy polyurethane resin, epoxy phenolic resin or bisphenol A type epoxy resin, etc. one or more of .
  • the insulating member 235 is an insulating layer formed by physical and chemical reactions on the outer surface of the pole 232 .
  • the insulating layer is an insulating protective layer formed by reacting on the surface of the pole 232 by chemical means or physical means.
  • the material of the pole 232 is aluminum
  • the material of the insulating layer is chemical means or physical means Alumina formed by reaction on the surface of pole 232 .
  • the present application also provides a battery cell 20 , including an electrode assembly 21 , a casing 22 and an end cap assembly 23 according to any of the above schemes.
  • the casing 22 has an opening 221 for accommodating the electrode assembly 21 .
  • the end cap 231 is used to cover the opening 221 , and the pole 232 is electrically connected to the electrode assembly 21 .
  • the present application also provides a battery 100 , including a box body 10 and a battery cell 20 according to any of the above schemes.
  • the case 10 is used to house the battery cells 20 .
  • the present application also provides an electric device, including the battery 100 according to any of the above schemes, and the battery 100 is used to provide electric energy for the electric device.
  • the electric device may be any of the aforementioned devices or systems using the battery 100 .
  • the end cover 231 has an opposite first side 2312 and a second side 2313 in its thickness direction, the second side 2313 is used to face the electrode assembly 21, and the end cover 231 is provided with a mounting hole 2311, and the mounting hole 2311 is along the end cover.
  • the thickness direction of the end cover 231 runs through the first side 2312 and the second side 2313 of the end cover 231 .
  • the pole 232 includes a main body section 2321 and a first connecting section 2322 and a second connecting section 2323 connected to both ends of the main body section 2321.
  • the main body section 2321 is passed through the installation hole 2311, and the two ends of the main body section 2321 respectively extend out of the mounting hole.
  • the hole 2311 is provided with an annular groove 2324 extending along the circumference of the pole 232 on the outer surface of the body section 2321 , the first connecting section 2322 is located on the first side 2312 , and the second connecting section 2323 is located on the second side 2313 .
  • the connecting piece 238 is connected to the pole 232 and located on the first side 2312 of the end cover 231 .
  • the first connecting section 2322 presses on the connecting piece 238 to press the connecting piece 238 on the first side 2312 of the end cover 231 .
  • the first spacer 233 and the second spacer 234 are respectively arranged on the first side 2312 and the second side 2313 of the end cover 231, and the first spacer 233 and the second spacer 234 are used to cooperate with the insulating isolated pole 232 and the end cover 231, the first spacer 233 has a spacer 2331 extending into the installation hole 2311, the spacer 2331 is located between the main body section 2321 and the hole wall of the installation hole 2311, along the thickness direction of the end cover 231, the spacer 2331 and the second Gaps 236 are formed between spacers 234 .
  • a portion of the first spacer 233 is located between the connection piece 238 and the end cover 231 along the thickness direction of the end cover 231 , and the connection piece 238 has a first abutting surface 2381 against the first spacer 233 .
  • a portion of the second spacer 234 is located between the second connection section 2323 and the end cover 231 along the thickness direction of the end cover 231 , and the second spacer 234 has a second abutting surface 2341 for the second connection section 2323 to abut against.
  • the insulator 235 covers the outer peripheral side of the main body section 2321 along the circumferential direction of the main body section 2321, and the insulator 235 is accommodated in the annular groove 2324 of the main body section 2321, and the insulator 235 is configured to block the main body section 2321 from entering the installation hole 2311 Contact with the conductive medium inside.
  • the insulator 235 has a first end and a second end opposite to each other, and the first end and the second end extend from the mounting hole 2311 to the first side 2312 and the second side 2313 of the end cover 231 respectively.
  • the sealing member 239 is sleeved on the outer side of the insulating member 235 , and the sealing member 239 is located in the installation hole 2311 .
  • the sealing member 239 is used for sealing the isolation portion 2331 and the second isolation member 234 .
  • Fig. 10 is a schematic flow chart of the manufacturing method of the end cap assembly 23 provided by some embodiments of the present application, the manufacturing method includes:
  • S100 provide an end cover 231, the end cover 231 is provided with a mounting hole 2311, and the mounting hole 2311 penetrates the end cover 231 along the thickness direction of the end cover 231;
  • S200 providing a pole 232, the pole 232 includes a main body section 2321;
  • the first spacer 233 and the second spacer 234 form a gap 236 at a position opposite to the mounting hole 2311, and both ends of the insulating part 235 exceed the gap 236, and the insulating part 235 is configured In order to prevent the main body section 2321 from contacting the conductive medium entering the installation hole 2311 .
  • the first providing device 2100 is used for providing the end cover 231 , the end cover 231 is provided with an installation hole 2311 , and the installation hole 2311 penetrates the end cover 231 along the thickness direction of the end cover 231 .
  • the second providing device 2200 is used for providing a pole 232 , and the pole 232 includes a main body section 2321 .
  • the third providing device 2300 is used for providing the insulating member 235 .
  • the fourth providing device 2400 is used for providing the first spacer 233 and the second spacer 234 .
  • the first assembly device 2500 is used for wrapping the insulating member 235 on the main body section 2321 along the circumferential direction of the main body section 2321 .
  • the second assembly device 2600 is used for inserting the pole 232 into the installation hole 2311 so that the main body section 2321 passes through the installation hole 2311 .
  • the third assembly device 2700 is used to arrange the first spacer 233 and the second spacer 234 on both sides of the end cover 231 respectively, so that the first spacer 233 and the second spacer 234 are used to cooperate with the insulation isolation end cover 231 and pole 232 .
  • the first spacer 233 and the second spacer 234 form a gap 236 at a position opposite to the mounting hole 2311, and both ends of the insulating part 235 exceed the gap 236, and the insulating part 235 is configured In order to prevent the main body section 2321 from contacting the conductive medium entering the installation hole 2311 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供了一种端盖组件、电池单体、电池及用电装置，属于电池技术领域。其中，端盖组件包括端盖、极柱、第一隔离件、第二隔离件和绝缘件。端盖开设有安装孔，安装孔沿端盖的厚度方向贯穿端盖。极柱包括穿设于安装孔内的主体段。沿端盖的厚度方向，第一隔离件和第二隔离件分别设置于端盖的两侧并用于配合绝缘隔离端盖和极柱。绝缘件沿主体段的周向包覆于主体段，绝缘件用于阻挡主体段与进入安装孔内的导电介质接触。沿端盖的厚度方向，第一隔离件和第二隔离件在与安装孔相对的位置形成有间隙，绝缘件的两端均超出间隙。这种结构的端盖组件能够减少极柱与端盖出现电流导通的现象，有利于降低电池单体短路的风险和壳体出现电腐蚀的安全隐患。

Description

端盖组件、电池单体、电池及用电装置
相关申请的交叉引用
本申请要求享有于2021年10月29日提交的名称为“一种端盖组件、电池单体、电池及用电装置”的国内专利申请CN202122633976.0的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及电池技术领域，具体而言，涉及一种端盖组件、电池单体、电池及用电装置。
背景技术
锂离子电池具有能量密度高、环境污染小、功率密度大、使用寿命长、适应范围广、自放电系数小等突出的优点，是现今世界上应用最为广泛的电池之一，也是新能源发展的重要组成部分。锂离子电池的电池单体是由正极极片、负极极片和隔膜通过卷绕或者叠片等方式组装成电极组件(裸电芯)，之后装入壳体，再盖上端盖，最后注入电解液后得到的。但是，随着锂离子电池技术的不断发展，对锂离子电池的安全性能和循环使用寿命等也提出了更高的要求。然而，现有的电池中的电池单体在后期使用过程中极容易出现短路或壳体腐蚀的现象，从而导致电池存在较大的安全隐患，不利于消费者的使用安全。
发明内容
本申请实施例提供一种端盖组件、电池单体、电池及用电装置，能够有效降低电池在使用过程中的安全隐患。
第一方面，本申请实施例提供一种端盖组件，包括端盖、极柱、第一隔离件、第二隔离件和绝缘件；端盖开设有安装孔，安装孔沿端盖的厚度方向贯穿端盖；极柱用于与电极组件电连接，极柱包括穿设于安装孔内的主体段；沿端盖的厚度方向，第一隔离件和第二隔离件分别设置于端盖的两侧，第一隔离件和第二隔离件用于配合绝缘隔离端盖和极柱；绝缘件沿主体段的周向包覆于主体段，绝缘件被配置为阻挡主体段与进入安装孔内的导电介质接触；其中，沿端盖的厚度方向，第一隔离件和第二隔离件在与安装孔相对的位置形成有间隙，绝缘件的两端均超出间隙。
在上述技术方案中，端盖的两侧分别设置有第一隔离件和第二隔离件，以使第一隔离件和第二隔离件能够配合绝缘隔离端盖和极柱，由于第一隔离件和第二隔离件在安装孔对应的位置形成有间隙，使得端盖组件在被电解液污染，电解液进入至间隙内后会形成具有导电能力的结晶，从而通过在极柱的主体段的外周侧包覆绝缘件，并将绝缘件的两端均超出间隙，以使绝缘件能够有效绝缘隔离极柱和电解液在间隙处形成的结晶，且绝缘件还能够绝缘隔离极柱和安装孔的孔壁在加工时形成的毛刺，进而能够有效减少极柱与端盖之间出现电流导通的现象，有利于降低具有这种端盖组件的电池单体出现短路的风险，且能够有效减少端盖组件的端盖或电池单体的壳体出现电腐蚀的安全隐患。
在一些实施例中，第一隔离件具有延伸至安装孔内的隔离部，隔离部用于绝缘隔离端盖和主体段；沿端盖的厚度方向，隔离部与第二隔离件形成间隙。
在上述技术方案中，通过在第一隔离件上设置隔离部，且隔离部延伸至安装孔内，也就是说，隔离部位于极柱的主体段与安装孔的孔壁之间，从而能够提高第一隔离件绝缘隔离极柱的主体段与安装孔的孔壁的效果，且有利于减小第一隔离件与第二隔离件之间形成的间隙的大小，进而能够进一步降低极柱与端盖之间出现电流导通的风险。
在一些实施例中，沿端盖的厚度方向，端盖具有相对的第一侧和第二侧，第二侧用于面向电极组件；端盖组件还包括连接件，连接件连接于极柱且位于第一侧，沿端盖的厚度方向，第一隔离件的至少部分位于连接件和端盖之间，以绝缘隔离连接件和端盖；其中，沿端盖的厚度方向，连接件具有用于抵靠于第一隔离件的第一抵靠面，绝缘件具有伸出于第一侧的第一端，第一抵靠面相 较于第一端更靠近于端盖。
在上述技术方案中，端盖的第一侧设置连接件，且将连接件连接于极柱，以通过连接件能够将极柱固定于端盖上。其中，通过将绝缘件的第一端伸出于端盖的第一侧，且将第一端设置为相较于连接件的第一抵靠面更远离于端盖，也就是说，绝缘件的第一端超出连接件的第一抵靠面，从而采用这种结构的绝缘件能够绝缘隔离极柱与电解液从连接件和第一隔离件之间渗入后形成的结晶，以进一步缓解极柱与端盖出现电流导通的风险。
在一些实施例中，极柱还包括第一连接段；第一连接段连接于主体段且位于第一侧，第一连接段被配置为将连接件压紧于第一隔离件。
在上述技术方案中，极柱具有位于端盖的第一侧的第一连接段，通过第一连接段能够将连接件压紧于第一隔离件上，从而使得极柱能够通过连接件紧固于端盖上，以提升极柱的安装稳定性和牢靠性。
在一些实施例中，极柱还包括第二连接段；第二连接段连接于主体段且位于第二侧，第二连接段用于与电极组件电连接，沿端盖的厚度方向，第二隔离件的至少部分位于第二连接段和端盖之间，以绝缘隔离第二连接段和端盖；其中，沿端盖的厚度方向，第二隔离件具有用于抵靠于第二连接段的第二抵靠面，绝缘件具有伸出于第二侧的第二端，第二抵靠面相较于第二端更靠近于端盖。
在上述技术方案中，极柱具有位于端盖的第二侧的第二连接段，并将第二连接段通过第二隔离件抵靠于端盖的第二侧，从而通过第二连接段能够将极柱固定于端盖上，且使得第二隔离件能够有效隔绝第二连接段和端盖的第二侧。其中，通过将绝缘件的第二端伸出于端盖的第二侧，且将第二端设置为相较于第一隔离件的第二抵靠面更远离于端盖，也就是说，绝缘件的第二端超出第二隔离件的第二抵靠面，从而能够进一步提升端盖与极柱之间的绝缘隔离效果。
在一些实施例中，端盖组件还包括密封件；密封件套设于绝缘件的外侧，且密封件位于安装孔内，密封件用于密封隔离部和第二隔离件。
在上述技术方案中，通过在第一隔离件的隔离部与第二隔离件之间设置密封件，也就是说，第一隔离件的隔离部与第二隔离件之间形成的间隙内设置有密封件，从而能够提升第一隔离件的隔离部与第二隔离件之间的密封效果，以降低电解液渗入的风险。
在一些实施例中，主体段的外周面开设有沿主体段的周向延伸的环形槽，环形槽用于容纳绝缘件。
在上述技术方案中，通过在极柱的主体段的外周面上开设用于容纳绝缘件的环形槽，从而采用这种结构一方面能够对绝缘件起到一定的限位作用，以减少绝缘件相对主体段出现窜动的现象，另一方面还能够对绝缘件起到一定的定位作用，从而在生产的过程中便于对绝缘件进行安装。
在一些实施例中，沿极柱的径向，绝缘件的外周面不超出主体段的外周面。
在上述技术方案中，通过将绝缘件的外周面设置为不超出主体段的外周面，也就是说，绝缘件完全容纳于环形槽内，从而能够对绝缘件起到较好的保护作用。
在一些实施例中，绝缘件的厚度为0.005mm-1.5mm。
在上述技术方案中，通过将绝缘件的厚度设置在0.005毫米至1.5毫米之间，从而能够降低因绝缘件的厚度太薄而造成绝缘效果不佳的风险，且能够缓解因绝缘件的厚度太厚而占用极柱的空间，以造成极柱的导流能力不足的现象。
在一些实施例中，绝缘件为套设于主体段的外侧的绝缘膜。
在一些实施例中，绝缘件为涂设于主体段的外表面的绝缘层。
在一些实施例中，绝缘件为在极柱的外表面物化反应形成的绝缘层。
第二方面，本申请实施例还提供一种电池单体，包括电极组件、壳体和上述的端盖组件；壳体具有开口，壳体用于容纳电极组件；端盖用于盖合开口，极柱与电极组件电连接。
第三方面，本申请实施例还提供一种电池，包括箱体和上述的电池单体；箱体用于容纳电池单体。
第四方面，本申请实施例还提供一种用电装置，包括上述的电池。
第五方面，本申请实施例还提供一种端盖组件的制造方法，包括：提供端盖，端盖开设有安装孔，安装孔沿端盖的厚度方向贯穿端盖；供极柱，极柱包括主体段；提供绝缘件；提供第一隔离件和第二隔离件；将绝缘件沿主体段的周向包覆于主体段；将极柱插设于安装孔内，以使主体段穿设于安装孔内；将第一隔离件和第二隔离件分别设置于端盖的两侧，以使第一隔离件和第二隔离件用于配合绝缘隔离端盖和极柱；其中，沿端盖的厚度方向，第一隔离件和第二隔离件在与安装孔相对的位置形成有间隙，绝缘件的两端均超出间隙，绝缘件被配置为阻挡主体段与进入安装孔内的导电介质接触。
第六方面，本申请实施例还提供一种端盖组件的制造设备，包括第一提供装置、第二提供装置、第三提供装置、第四提供装置、第一组装装置、第二组装装置和第三组装装置；第一提供装置用于提供端盖，端盖开设有安装孔，安装孔沿端盖的厚度方向贯穿端盖；第二提供装置用于提供极柱，极柱包括主体段；第三提供装置用于提供绝缘件；第四提供装置用于提供第一隔离件和第二隔离件；第一组装装置用于将绝缘件沿主体段的周向包覆于主体段；第二组装装置用于将极柱插设于安装孔内，以使主体段穿设于安装孔内；第三组装装置用于将第一隔离件和第二隔离件分别设置于端盖的两侧，以使第一隔离件和第二隔离件用于配合绝缘隔离端盖和极柱；其中，沿端盖的厚度方向，第一隔离件和第二隔离件在与安装孔相对的位置形成有间隙，绝缘件的两端均超出间隙，绝缘件被配置为阻挡主体段与进入安装孔内的导电介质接触。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本申请的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本申请一些实施例提供的车辆的结构示意图；
图2为本申请一些实施例提供的电池的结构爆炸图；
图3为本申请一些实施例提供的电池单体的结构爆炸图；
图4为本申请一些实施例提供的端盖组件的结构示意图；
图5为本申请一些实施例提供的端盖组件的结构爆炸图；
图6为本申请一些实施例提供的端盖组件的剖面图；
图7为图6所示的端盖组件的A处的局部放大图；
图8为本申请一些实施例提供的极柱与绝缘件的连接示意图；
图9为本申请一些实施例提供的极柱的结构示意图；
图10为本申请一些实施例提供的端盖组件的制造方法的流程示意图；
图11为本申请一些实施例提供的端盖组件的制造设备的示意性框图。
图标：1000-车辆；100-电池；10-箱体；11-第一部分；12-第二部分；20-电池单体；21-电极组件；211-极耳；22-壳体；221-开口；23-端盖组件；231-端盖；2311-安装孔；2312-第一侧；2313-第二侧；232-极柱；2321-主体段；2322-第一连接段；2323-第二连接段；2324-环形槽；233-第一隔离件；2331-隔离部；2332-延伸部；234-第二隔离件；2341-第二抵靠面；235-绝缘件；236-间隙；237-泄压机构；238-连接件；2381-第一抵靠面；239-密封件；200-控制器；300-马达；2000-制造设备；2100-第一提供装置；2200-第二提供装置；2300-第三提供装置；2400-第四提供装置；2500-第一组装装置；2600-第二组装装置；2700-第三组装装置。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“附接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请的实施例中，相同的附图标记表示相同的部件，并且为了简洁，在不同实施例中，省略对相同部件的详细说明。应理解，附图示出的本申请实施例中的各种部件的厚度、长宽等尺寸，以及集成装置的整体厚度、长宽等尺寸仅为示例性说明，而不应对本申请构成任何限定。
本申请中出现的“多个”指的是两个以上(包括两个)。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方形电池单体和软包电池单体，本申请实施例对此也不限定。
本申请的实施例所提到的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池模块或电池包等。电池一般包括用于封装一个或多个电池单体或多个电池模块的箱体。箱体可以避免液体或其他异物影响电池单体的充电或放电。
电池单体包括外壳、电极组件和电解液，外壳用于容纳电极组件和电解液。电极组件由正极极片、负极极片和隔离膜组成。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的正极集流体凸出于已涂覆正极活性物质层的正极集流体，未涂敷正极活性物质层的正极集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的负极集流体凸出于已涂覆负极活性物质层的负极集流体，未涂敷负极活性物质层的负极集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。
隔离膜的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
锂离子电池具有能量密度高、环境污染小、功率密度大、使用寿命长、适应范围广、自放电系数小等突出的优点，是现今世界上应用最为广泛的电池之一，也是新能源发展的重要组成部分。锂离子电池的电池单体是由正极极片、负极极片和隔膜通过卷绕或者叠片等方式组装成电极组件(裸电芯)，之后装入壳体，再盖上端盖，最后注入电解液后得到的。但是，随着锂离子电池技术的不断发展，对锂离子电池的安全性能和循环使用寿命等也提出了更高的要求。
发明人发现，对于一般的电池单体而言，电池单体通常采用在端盖上设置安装孔，并将极柱在穿设于安装孔内后铆接于端盖上，且极柱与容纳于壳体内的电极组件进行电连接，以使极柱作为电池单体的正输出极或负输出极，从而实现电池单体的电能的输出和输出。在现有技术中，为了保证极柱与端盖之间的绝缘，避免极柱与端盖以及壳体形成电流导通，通常采用在端盖的两侧设置上塑胶和下塑胶，并将上塑胶或下塑胶的部分延伸至安装孔的孔壁与极柱之间，以实现极柱与端盖之间的绝缘隔离。然而，在这种结构的电池单体中，由于上塑胶与端盖之间和上塑胶与下塑胶之间均存在间隙，以导致电池单体在受到外部的电解液污染时电解液会渗透至上塑胶与端盖之间和上塑胶与下塑胶之间的间隙处，并形成能够导电的结晶，从而造成极柱与端盖形成电流导通的现象，使得电池单体的端盖和壳体带电，进而极容易造成电池单体在后期使用过程中出现短路或壳体出现电腐蚀的现象，以导致电池单体存在较大的安全隐患，不利于消费者的使用安全，且不利于提升电池单体的循环使用寿命。
基于上述考虑，为了解决电池单体在后期使用过程中存在较大的安全隐患和使用寿命较短的问题，发明人经过深入研究，设计了一种端盖组件，端盖组件包括端盖、极柱、第一隔离件、第二隔离件和绝缘件。端盖上设置有安装孔，且安装孔沿端盖的厚度方向贯穿端盖的两侧。极柱具有插设于安装孔内的主体段。第一隔离件和第二隔离件沿端盖的厚度方向分别设置于端盖的两侧，第一隔离件和第二隔离件用于配合绝缘隔离端盖和极柱，沿端盖的厚度方向，第一隔离件和第二隔离件在与安装孔相对的位置形成有间隙。绝缘件包覆于主体段的外周侧，且绝缘件的两端均超出间隙，绝缘件被配置为阻挡主体段与进入安装孔内的导电介质接触。
在具有这种端盖组件的电池单体中，端盖的两侧分别设置有第一隔离件和第二隔离件，以使第一隔离件和第二隔离件能够配合绝缘隔离端盖和极柱，由于第一隔离件和第二隔离件在安装孔对应的位置形成有间隙，使得端盖组件在被电解液污染，电解液进入至间隙内后会形成具有导电能力的结晶，从而通过在极柱的主体段的外周侧包覆绝缘件，并将绝缘件的两端均超出间隙，以使绝缘件能够有效绝缘隔离极柱和电解液在间隙处形成的结晶，且绝缘件还能够绝缘隔离极柱和安装孔的孔壁在加工时形成的毛刺，进而能够有效减少极柱与端盖之间出现电流导通的现象，有利于降低具有这种端盖组件的电池单体出现短路的风险，且能够有效减少端盖组件的端盖或电池单体的壳体出现电腐蚀的安全隐患。
本申请实施例公开的端盖组件可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的端盖组件、电池单体等组成该用电装置的电源系统，这样，有利于缓解电池单体出现短路或电腐蚀的现象，以提升电池单体的使用寿命和安全性。
本申请实施例提供一种使用电池作为电源的用电装置，用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电装置为车辆1000为例进行说明。
请参照图1，图1为本申请一些实施例提供的车辆1000的结构示意图。车辆1000可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1000的内部设置有电池100，电池100可以设置在车辆1000的底部或头部或尾部。电池100可以用于车辆1000的供电，例如，电池100可以作为车辆1000的操作电源。车辆1000还可以包括控制器200和马达300，控制器200用来控制电池100为马达300供电，例如，用于车辆1000的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池100不仅可以作为车辆1000的操作电源，还可以作为车辆 1000的驱动电源，代替或部分地代替燃油或天然气为车辆1000提供驱动动力。
请参照图2，图2为本申请一些实施例提供的电池100的结构爆炸图。电池100包括箱体10和电池单体20，箱体10用于容纳电池单体20。其中，箱体10用于为电池单体20提供装配空间，箱体10可以采用多种结构。在一些实施例中，箱体10可以包括第一部分11和第二部分12，第一部分11与第二部分12相互盖合，第一部分11和第二部分12共同限定出用于容纳电池单体20的装配空间。第二部分12可以为一端开放的空心结构，第一部分11可以为板状结构，第一部分11盖合于第二部分12的开放侧，以使第一部分11与第二部分12共同限定出装配空间；第一部分11和第二部分12也可以是均为一侧开放的空心结构，第一部分11的开放侧盖合于第二部分12的开放侧。当然，第一部分11和第二部分12形成的箱体10可以是多种形状，比如，圆柱体、长方体等。
在电池100中，电池单体20可以是一个，也可以是多个。当电池单体20为多个时，多个电池单体20之间可串联或并联或混联，混联是指多个电池单体20中既有串联又有并联。多个电池单体20之间可直接串联或并联或混联在一起，再将多个电池单体20构成的整体容纳于箱体10内；当然，电池100也可以是多个电池单体20先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体10内。电池100还可以包括其他结构，例如，该电池100还可以包括汇流部件，用于实现多个电池单体20之间的电连接。
其中，每个电池单体20可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体20可呈圆柱体、扁平体、长方体或其它形状等。
请参照图3，图3为本申请一些实施例提供的电池单体20的结构爆炸图。电池单体20包括电极组件21、壳体22和端盖组件23，壳体22具有开口221，壳体22用于容纳电极组件21，端盖组件23用于盖合于壳体22的开口221，且端盖组件23用于与电极组件21电连接。
电极组件21是电池单体20中发生电化学反应的部件，电极组件21面向端盖组件23的一端形成有极耳211，极耳211用于与端盖组件23电连接，以实现电池单体20的电能的输入或输出。电极组件21可以包括正极极片、负极极片和隔离膜。电极组件21可以是由正极极片、隔离膜和负极极片通过卷绕形成的卷绕式结构，也可以是由正极极片、隔离膜和负极极片通过层叠布置形成的层叠式结构。示例性的，在图3中，电极组件21为由正极极片、隔离膜和负极极片通过卷绕形成的卷绕式结构。
其中，壳体22还可以用于容纳电解质，例如电解液。壳体22可以是多种结构形式。壳体22的材质也可以是多种，比如，铜、铁、铝、钢、铝合金等。
在一些实施例中，壳体22为一侧开口221的空心结构，端盖组件23盖合于壳体22的开口221处并形成密封连接，以形成用于容纳电极组件21和电解质的密封空间，在组装电池单体20时，可先将电极组件21放入壳体22内，并向壳体22内填充电解质，再将端盖组件23盖合于壳体22的开口221。
壳体22可以是多种形状，比如，圆柱体、长方体等。壳体22的形状可根据电极组件21的具体形状来确定。比如，若电极组件21为圆柱体结构，则可选用为圆柱体的壳体；若电极组件21为长方体结构，则可选用长方体的壳体。当然，端盖组件23也可以是多种结构。端盖组件23的形状可以与壳体22的形状相适配，比如，端盖组件23为板状结构、一端开口221的空心结构等。示例性的，在图3中，电极组件21为圆柱形结构，则壳体22为圆柱形结构，端盖组件23盖合于壳体22的开口221处。
可理解的，电池单体20并不仅仅局限于上述结构，电池单体20也可以是其他结构，比如，电池单体20包括壳体22和两个端盖组件23，壳体22为相对的两侧开口221的空心结构，一个端盖组件23对应盖合于壳体22的一个开口221处并形成密封连接，以形成用于容纳电极组件21和电解质的密封空间。
需要说明的是，在本申请实施例中，容纳于壳体22内的电极组件21可以是一个，也可以是多个。示例性的，在图3中，电极组件21为两个，两个电极组件21层叠布置。
端盖组件23是盖合于壳体22的开口221以将电池单体20的内部环境与外部环境隔绝的组件。
根据本申请的一些实施例，参照图3，并请进一步参照图4、图5和图6，图4为本申请一些实施例提供的端盖组件23的结构示意图，图5为本申请一些实施例提供的端盖组件23的结构爆炸图，图6为本申请一些实施例提供的端盖组件23的剖面图。本申请提供了一种端盖组件23，端盖组件23包括端盖231、极柱232、第一隔离件233、第二隔离件234和绝缘件235。端盖231开设有安装孔2311，安装孔2311沿端盖231的厚度方向贯穿端盖231。极柱232用于与电极组件21电连接，极柱232包括穿设于安装孔2311内的主体段2321。沿端盖231的厚度方向，第一隔离件233和第二隔离件234分别设置于端盖231的两侧，第一隔离件233和第二隔离件234用于配合绝缘隔离端盖231和极柱232。绝缘件235沿主体段2321的周向包覆于主体段2321，绝缘件235被配置为阻挡主体段2321与进入安装孔2311内的导电介质接触。其中，沿端盖231的厚度方向，第一隔离件233和第二隔离件234在与安装孔2311相对的位置形成有间隙236，绝缘件235的两端均超出间隙236。
其中，主体段2321穿设于安装孔2311内，即主体段2321的部分位于安装孔2311内，且主体段2321的两端均延伸出安装孔2311。绝缘件235的两端均超出间隙236，即沿端盖231的厚度方向，且在与安装孔2311对应的位置处，第一隔离件233具有与第二隔离件234相对设置的第一面，第二隔离件234具有与第一面相对设置的第二面，绝缘件235对应设置于间隙236处且绝缘件235的两端分别超出第一面和第二面，也就是说，在极柱232的径向上，极柱232的主体段2321对应间隙236的位置包覆有绝缘件235，且间隙236位于绝缘件235在极柱232的径向上的投影内。
绝缘件235被配置为阻挡主体段2321与进入安装孔2311内的导电介质接触，示例性的，导电介质可能是电解液渗入间隙236内后形成的导电结晶，也可能是安装孔2311在加工的过程中在孔壁上形成的毛刺或金属拉丝等。
其中，极柱232用于与电极组件21的极耳211(可以为正极极耳，也可以为负极极耳)连接，以使极柱232与电极组件21之间形成电连接，从而通过极柱232能够实现电池单体20的电能的输入和输出。需要说明的是，极柱232可以是直接与电极组件21的极耳211连接，比如，焊接或抵接等；也可以通过其他部件与电极组件21的极耳211间接连接，比如，极柱232通过转接片与电极组件21的极耳211相连，也就是说，转接片先焊接或抵接于电极组件21的极耳211后，再与极柱232进行焊接或抵接。
可选地，在图6中，用于输入和输出电池单体20的正输出极或负输出极的极柱232为两个，即两个极柱232均与电极组件21的极耳211相连，以通过两个极柱232同时形成电池单体20的正输出极或负输出极。两个极柱232的外周侧均包覆有绝缘件235，同样的，端盖231上对应的位置开设有两个安装孔2311，安装孔2311与极柱232对应设置。当然，在其他实施例中，用于输入和输出电池单体20的正输出极或负输出极的极柱232也可以为一个、三个或四个等。
极柱232的材质可以是多种，比如，铜、铁、铝、钢、铝合金等。
示例性的，第一隔离件233和第二隔离件234分别为端盖组件23的上塑胶和下塑胶。第一隔离件233和第二隔离件234的具体结构可参见相关技术，在此不再赘述。
在一些实施例中，在图4和图5中，端盖组件23还可以包括泄压机构237，泄压机构237安装于端盖231上。泄压机构237用于在电池单体20的内部压力或温度达到预定值时泄放电池单体20内部的压力。
示例性的，泄压机构237可以是诸如防爆阀、防爆片、气阀、泄压阀或安全阀等部件。
端盖231的两侧分别设置有第一隔离件233和第二隔离件234，以使第一隔离件233和第二隔离件234能够配合绝缘隔离端盖231和极柱232，由于第一隔离件233和第二隔离件234在安装孔2311对应的位置形成有间隙236，使得端盖组件23在被电解液污染，电解液进入至间隙236内后会形成具有导电能力的结晶，从而通过在极柱232的主体段2321的外周侧包覆绝缘件235，并将绝缘件235的两端均超出间隙236，以使绝缘件235能够有效绝缘隔离极柱232和电解液在间 隙236处形成的结晶，且绝缘件235还能够绝缘隔离极柱232和安装孔2311的孔壁在加工时形成的毛刺，进而能够有效减少极柱232与端盖231之间出现电流导通的现象，有利于降低具有这种端盖组件23的电池单体20出现短路的风险，且能够有效减少端盖组件23的端盖231或电池单体20的壳体22出现电腐蚀的安全隐患。
根据本申请的一些实施例，参照图6，并请进一步参照图7，图7为图6所示的端盖组件23的A处的局部放大图。第一隔离件233具有延伸至安装孔2311内的隔离部2331，隔离部2331用于绝缘隔离端盖231和主体段2321。沿端盖231的厚度方向，隔离部2331与第二隔离件234形成间隙236。
其中，第一隔离件233的隔离部2331延伸至安装孔2311内，并用于绝缘隔离端盖231和主体段2321，即隔离部2331位于极柱232的主体段2321与安装孔2311的孔壁之间，以使隔离部2331能够绝缘隔离端盖231和主体段2321。
需要说明的是，在其他实施例中，隔离部2331也可以设置于第二隔离件234上，隔离部2331延伸至极柱232与安装孔2311的孔壁之间。沿端盖231的厚度方向，隔离部2331与第一隔离件233之间形成间隙236。当然，端盖组件23的结构并不局限于此，比如，第一隔离件233和第二隔离件234上也可以均设置有隔离部2331，隔离部2331延伸至极柱232与安装孔2311的孔壁之间。沿端盖231的厚度方向，第一隔离件233的隔离部2331与第二隔离件234的隔离部2331之间形成间隙236。
通过在第一隔离件233上设置隔离部2331，且隔离部2331延伸至安装孔2311内，从而能够提高第一隔离件233绝缘隔离极柱232的主体段2321与安装孔2311的孔壁的效果，且有利于减小第一隔离件233与第二隔离件234之间形成的间隙236的大小，进而能够进一步降低极柱232与端盖231之间出现电流导通的风险。
根据本申请的一些实施例，请继续参见图6和图7所示，沿端盖231的厚度方向，端盖231具有相对的第一侧2312和第二侧2313，第二侧2313用于面向电极组件21。端盖组件23还包括连接件238，连接件238连接于极柱232且位于第一侧2312，沿端盖231的厚度方向，第一隔离件233的至少部分位于连接件238和端盖231之间，以绝缘隔离连接件238和端盖231。其中，沿端盖231的厚度方向，连接件238具有用于抵靠于第一隔离件233的第一抵靠面2381，绝缘件235具有伸出于第一侧2312的第一端，第一抵靠面2381相较于第一端更靠近于端盖231。
其中，端盖231的第二侧2313用于面向电极组件21，即端盖组件23在盖合于壳体22的开口221时，端盖231的第二侧2313用于面向壳体22的内部，也就是说，端盖231的第一侧2312为背离壳体22的内部的一侧，即电池单体20的外侧。
示例性的，连接块为铆接块，以使极柱232能够通过铆接块铆接于端盖231上。
在一些实施例中，参见图6所示，第一隔离件233还具有延伸部2332，延伸部2332沿端盖231的厚度方向往背离端盖231的方向延伸，且延伸部2332为沿连接件238的周向延伸的环形结构，以使延伸部2332沿连接件238的周向包覆于连接件238的外周侧，从而有利于提高第一隔离件233绝缘隔离端盖231和连接件238的效果，以降低端盖231和连接件238之间出现电流导通的风险。
端盖231的第一侧2312设置连接件238，且将连接件238连接于极柱232，以通过连接件238能够将极柱232固定于端盖231上。其中，通过将绝缘件235的第一端伸出于端盖231的第一侧2312，且将第一端设置为相较于连接件238的第一抵靠面2381更远离于端盖231，也就是说，绝缘件235的第一端超出连接件238的第一抵靠面2381，从而采用这种结构的绝缘件235能够绝缘隔离极柱232与电解液从连接件238和第一隔离件233之间渗入后形成的结晶，以进一步缓解极柱232与端盖231出现电流导通的风险。
根据本申请的一些实施例，参见图6和图7所示，极柱232还包括第一连接段2322。第一连接段2322连接于主体段2321且位于第一侧2312，第一连接段2322被配置为将连接件238压紧于第一隔离件233。
其中，第一连接段2322连接于主体段2321伸出于端盖231的第一侧2312的一端，且第一连接段2322的径向尺寸大于主体段2321，以使第一连接段2322能够压于连接件238上，从而实现极柱232铆接于端盖231上。
极柱232具有位于端盖231的第一侧2312的第一连接段2322，通过第一连接段2322能够将连接件238压紧于第一隔离件233上，从而使得极柱232能够通过连接件238紧固于端盖231上，以提升极柱232的安装稳定性和牢靠性。
根据本申请的一些实施例，请继续参见图6和图7所示，极柱232还包括第二连接段2323。第二连接段2323连接于主体段2321且位于第二侧2313，第二连接段2323用于与电极组件21电连接，沿端盖231的厚度方向，第二隔离件234的至少部分位于第二连接段2323和端盖231之间，以绝缘隔离第二连接段2323和端盖231。其中，沿端盖231的厚度方向，第二隔离件234具有用于抵靠于第二连接段2323的第二抵靠面2341，绝缘件235具有伸出于第二侧2313的第二端，第二抵靠面2341相较于第二端更靠近于端盖231。
其中，沿端盖231的厚度方向，第二隔离件234的至少部分位于第二连接段2323和端盖231之间，且第二隔离件234具有用于抵靠于第二连接段2323的第二抵靠面2341，即第二连接段2323通过第二隔离件234抵靠于端盖231的第二侧2313，以使第二连接段2323能够配合第一连接段2322和连接件238将极柱232紧固于端盖231上。
极柱232具有位于端盖231的第二侧2313的第二连接段2323，并将第二连接段2323通过第二隔离件234抵靠于端盖231的第二侧2313，从而通过第二连接段2323能够将极柱232固定于端盖231上，且使得第二隔离件234能够有效隔绝第二连接段2323和端盖231的第二侧2313。其中，通过将绝缘件235的第二端伸出于端盖231的第二侧2313，且将第二端设置为相较于第一隔离件233的第二抵靠面2341更远离于端盖231，也就是说，绝缘件235的第二端超出第二隔离件234的第二抵靠面2341，从而能够进一步提升端盖231与极柱232之间的绝缘隔离效果。
根据本申请的一些实施例，请参照图6和图7所示，端盖组件23还包括密封件239。密封件239套设于绝缘件235的外侧，且密封件239位于安装孔2311内，密封件239用于密封隔离部2331和第二隔离件234。
其中，密封件239套设于绝缘件235的外侧，且密封件239位于安装孔2311内，即密封件239位于极柱232的主体段2321与安装孔2311的孔壁之间，且沿端盖231的厚度方向，密封件239位于第一隔离件233的隔离部2331与第二隔离件234之间形成的间隙236内。
示例性的，密封件239为密封圈，密封件239的材质可以为塑胶、硅胶或橡胶等。
需要说明的是，密封件239套设于绝缘件235的外侧，密封件239与绝缘件235可以为一体式结构，也可以为分体式结构，即密封件239与绝缘件235可以为采用一体成型工艺制成的结构，也可以两者相互独立，密封件239套设于绝缘件235的外周侧。在图7中，密封件239与绝缘件235分体式结构。
通过在第一隔离件233的隔离部2331与第二隔离件234之间设置密封件239，也就是说，第一隔离件233的隔离部2331与第二隔离件234之间形成的间隙236内设置有密封件239，从而能够提升第一隔离件233的隔离部2331与第二隔离件234之间的密封效果，以降低电解液渗入的风险。
根据本申请的一些实施例，参照图7，并请进一步参照图8和图9，图8为本申请一些实施例提供的极柱232与绝缘件235的连接示意图，图9为本申请一些实施例提供的极柱232的结构示意图。主体段2321的外周面开设有沿主体段2321的周向延伸的环形槽2324，环形槽2324用于容纳绝缘件235。
通过在极柱232的主体段2321的外周面上开设用于容纳绝缘件235的环形槽2324，从而采用这种结构一方面能够对绝缘件235起到一定的限位作用，以减少绝缘件235相对主体段2321出现窜动的现象，另一方面还能够对绝缘件235起到一定的定位作用，从而在生产的过程中便于对绝缘件235进行安装。
根据本申请的一些实施例，请继续参见图7、图8和图9所示，沿极柱232的径向，绝缘件235的外周面不超出主体段2321的外周面。
其中，绝缘件235的外周面不超出主体段2321的外周面，即在极柱232的径向上，绝缘件235完全容纳于环形槽2324内。
通过将绝缘件235的外周面设置为不超出主体段2321的外周面，从而能够对绝缘件235起到较好的保护作用。
根据本申请的一些实施例，绝缘件235的厚度为0.005mm-1.5mm。
通过将绝缘件235的厚度设置在0.005毫米至1.5毫米之间，从而能够降低因绝缘件235的厚度太薄而造成绝缘效果不佳的风险，且能够缓解因绝缘件235的厚度太厚而占用极柱232的空间，以造成极柱232的导流能力不足的现象。
根据本申请的一些实施例，绝缘件235为套设于主体段2321的外侧的绝缘膜。
其中，绝缘膜可以采用粘贴或热熔等工艺包覆于极柱232的主体段2321上。
示例性的，绝缘膜的材质可以为聚酰亚胺、聚乙烯、聚偏二氟乙烯或聚四氟乙烯等中的一种或多种。
根据本申请的一些实施例，绝缘件235为涂设于主体段2321的外表面的绝缘层。
示例性的，绝缘层为通过喷涂的方式在极柱232的外周侧形成的绝缘涂层，绝缘层的材质可以为环氧聚氨树脂，环氧酚醛树脂或双酚A型环氧树脂等中的一种或多种。
根据本申请的一些实施例，绝缘件235为在极柱232的外表面物化反应形成的绝缘层。
示例性的，绝缘层为通过化学手段或物理手段在极柱232的表面进行反应形成的绝缘保护层，比如，当极柱232的材质为铝时，绝缘层的材质为采用化学手段或物理手段在极柱232表面进行反应形成的氧化铝。
根据本申请的一些实施例，本申请还提供了一种电池单体20，包括电极组件21、壳体22和以上任一方案的端盖组件23。壳体22具有开口221，壳体22用于容纳电极组件21。端盖231用于盖合开口221，极柱232与电极组件21电连接。
根据本申请的一些实施例，本申请还提供了一种电池100，包括箱体10和以上任一方案的电池单体20。箱体10用于容纳电池单体20。
根据本申请的一些实施例，本申请还提供了一种用电装置，包括以上任一方案的电池100，并且电池100用于为用电装置提供电能。
用电装置可以是前述任一应用电池100的设备或系统。
根据本申请的一些实施例，参见图3-图9所示，本申请提供了一种端盖组件23，包括端盖231、极柱232、连接件238、第一隔离件233、第二隔离件234、绝缘件235和密封件239。端盖231在其厚度方向上具有相对的第一侧2312和第二侧2313，第二侧2313用于面向电极组件21布置，且端盖231上开设有安装孔2311，安装孔2311沿端盖231的厚度方向贯穿端盖231的第一侧2312和第二侧2313。极柱232包括主体段2321和连接于主体段2321的两端的第一连接段2322和第二连接段2323，主体段2321穿设于安装孔2311内，且主体段2321的两端分别延伸出安装孔2311，主体段2321的外周面上开设有沿极柱232的周向延伸的环形槽2324，第一连接段2322位于第一侧2312，第二连接段2323位于第二侧2313。连接件238连接于极柱232且位于端盖231的第一侧2312，第一连接段2322压于连接件238上，以将连接件238压紧于端盖231的第一侧2312上。第一隔离件233和第二隔离件234分别设置于端盖231的第一侧2312和第二侧2313，第一隔离件233和第二隔离件234用于配合绝缘隔离极柱232和端盖231，第一隔离件233具有延伸至安装孔2311内的隔离部2331，隔离部2331位于主体段2321和安装孔2311的孔壁之间，沿端盖231的厚度方向，隔离部2331与第二隔离件234之间形成有间隙236。第一隔离件233的部分沿端盖231的厚度方向位于连接件238与端盖231之间，且连接件238具有抵靠于第一隔离件233上的第 一抵靠面2381。第二隔离件234的部分沿端盖231的厚度方向位于第二连接段2323与端盖231之间，且第二隔离件234具有供第二连接段2323抵靠的第二抵靠面2341。绝缘件235沿主体段2321的周向包覆于主体段2321的外周侧，且绝缘件235容纳于主体段2321的环形槽2324内，绝缘件235被配置为阻挡主体段2321与进入安装孔2311内的导电介质接触。沿端盖231的厚度方向，绝缘件235具有相对的第一端和第二端，第一端和第二端分别从安装孔2311内延伸出端盖231的第一侧2312和第二侧2313，且第一端相较于第一抵靠面2381更远离于端盖231，第二端相较于第二抵靠面2341更远离于端盖231。密封件239套设于绝缘件235的外侧，且密封件239位于安装孔2311内，密封件239用于密封隔离部2331和第二隔离件234。
本申请实施例还提供一种端盖组件23的制造方法，请参照图10，图10为本申请一些实施例提供的端盖组件23的制造方法的流程示意图，该制造方法包括：
S100：提供端盖231，端盖231开设有安装孔2311，安装孔2311沿端盖231的厚度方向贯穿端盖231；
S200：提供极柱232，极柱232包括主体段2321；
S300：提供绝缘件235；
S400：提供第一隔离件233和第二隔离件234；
S500：将绝缘件235沿主体段2321的周向包覆于主体段2321；
S600：将极柱232插设于安装孔2311内，以使主体段2321穿设于安装孔2311内；
S700：将第一隔离件233和第二隔离件234分别设置于端盖231的两侧，以使第一隔离件233和第二隔离件234用于配合绝缘隔离端盖231和极柱232；
其中，沿端盖231的厚度方向，第一隔离件233和第二隔离件234在与安装孔2311相对的位置形成有间隙236，绝缘件235的两端均超出间隙236，绝缘件235被配置为阻挡主体段2321与进入安装孔2311内的导电介质接触。
需要说明的是，通过上述各实施例提供的制造方法制造的端盖组件23的相关结构，可参见前述各实施例提供的端盖组件23，在此不再赘述。
本申请实施例还提供一种端盖组件23的制造设备2000，请参照图11，图11为本申请一些实施例提供的端盖组件23的制造设备2000的示意性框图，制造设备2000包括第一提供装置2100、第二提供装置2200、第三提供装置2300、第四提供装置2400、第一组装装置2500、第二组装装置2600和第三组装装置2700。
第一提供装置2100用于提供端盖231，端盖231开设有安装孔2311，安装孔2311沿端盖231的厚度方向贯穿端盖231。第二提供装置2200用于提供极柱232，极柱232包括主体段2321。第三提供装置2300用于提供绝缘件235。第四提供装置2400用于提供第一隔离件233和第二隔离件234。第一组装装置2500用于将绝缘件235沿主体段2321的周向包覆于主体段2321。第二组装装置2600用于将极柱232插设于安装孔2311内，以使主体段2321穿设于安装孔2311内。第三组装装置2700用于将第一隔离件233和第二隔离件234分别设置于端盖231的两侧，以使第一隔离件233和第二隔离件234用于配合绝缘隔离端盖231和极柱232。
其中，沿端盖231的厚度方向，第一隔离件233和第二隔离件234在与安装孔2311相对的位置形成有间隙236，绝缘件235的两端均超出间隙236，绝缘件235被配置为阻挡主体段2321与进入安装孔2311内的导电介质接触。
需要说明的是，通过上述实施例提供的制造设备2000制造的端盖组件23的相关结构，可参见前述各实施例提供的端盖组件23，在此不再赘述。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互结合。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进 等，均应包含在本申请的保护范围之内。

Claims (17)

  1. 一种端盖组件，包括：
    端盖，所述端盖开设有安装孔，所述安装孔沿所述端盖的厚度方向贯穿所述端盖；
    极柱，所述极柱用于与电极组件电连接，所述极柱包括穿设于所述安装孔内的主体段；
    第一隔离件和第二隔离件，沿所述端盖的厚度方向，所述第一隔离件和所述第二隔离件分别设置于所述端盖的两侧，所述第一隔离件和所述第二隔离件用于配合绝缘隔离所述端盖和所述极柱；以及
    绝缘件，所述绝缘件沿所述主体段的周向包覆于所述主体段，所述绝缘件被配置为阻挡所述主体段与进入所述安装孔内的导电介质接触；
    其中，沿所述端盖的厚度方向，所述第一隔离件和所述第二隔离件在与所述安装孔相对的位置形成有间隙，所述绝缘件的两端均超出所述间隙。
  2. 根据权利要求1所述的端盖组件，其中，所述第一隔离件具有延伸至所述安装孔内的隔离部，所述隔离部用于绝缘隔离所述端盖和所述主体段；
    沿所述端盖的厚度方向，所述隔离部与所述第二隔离件形成所述间隙。
  3. 根据权利要求2所述的端盖组件，其中，沿所述端盖的厚度方向，所述端盖具有相对的第一侧和第二侧，所述第二侧用于面向所述电极组件；
    所述端盖组件还包括连接件，所述连接件连接于所述极柱且位于所述第一侧，沿所述端盖的厚度方向，所述第一隔离件的至少部分位于所述连接件和所述端盖之间，以绝缘隔离所述连接件和所述端盖；
    其中，沿所述端盖的厚度方向，所述连接件具有用于抵靠于所述第一隔离件的第一抵靠面，所述绝缘件具有伸出于所述第一侧的第一端，所述第一抵靠面相较于所述第一端更靠近于所述端盖。
  4. 根据权利要求3所述的端盖组件，其中，所述极柱还包括：
    第一连接段，所述第一连接段连接于所述主体段且位于所述第一侧，所述第一连接段被配置为将所述连接件压紧于所述第一隔离件。
  5. 根据权利要求3或4所述的端盖组件，其中，所述极柱还包括：
    第二连接段，所述第二连接段连接于所述主体段且位于所述第二侧，所述第二连接段用于与所述电极组件电连接，沿所述端盖的厚度方向，所述第二隔离件的至少部分位于所述第二连接段和所述端盖之间，以绝缘隔离所述第二连接段和所述端盖；
    其中，沿所述端盖的厚度方向，所述第二隔离件具有用于抵靠于所述第二连接段的第二抵靠面，所述绝缘件具有伸出于所述第二侧的第二端，所述第二抵靠面相较于所述第二端更靠近于所述端盖。
  6. 根据权利要求2-5任一项所述的端盖组件，其中，所述端盖组件还包括：
    密封件，所述密封件套设于所述绝缘件的外侧，且所述密封件位于所述安装孔内，所述密封件用于密封所述隔离部和所述第二隔离件。
  7. 根据权利要求1-6任一项所述的端盖组件，其中，所述主体段的外周面开设有沿所述主体段的周向延伸的环形槽，所述环形槽用于容纳所述绝缘件。
  8. 根据权利要求7所述的端盖组件，其中，沿所述极柱的径向，所述绝缘件的外周面不超出所述主体段的外周面。
  9. 根据权利要求1-8任一项所述的端盖组件，其中，所述绝缘件的厚度为0.005mm-1.5mm。
  10. 根据权利要求1-9任一项所述的端盖组件，其中，所述绝缘件为套设于所述主体段的外侧的绝缘膜。
  11. 根据权利要求1-9任一项所述的端盖组件，其中，所述绝缘件为涂设于所述主体段的外表面的绝缘层。
  12. 根据权利要求1-9任一项所述的端盖组件，其中，所述绝缘件为在所述极柱的外表面物化反应形成的绝缘层。
  13. 一种电池单体，包括：
    电极组件；
    壳体，所述壳体具有开口，所述壳体用于容纳所述电极组件；以及
    根据权利要求1-12任一项所述的端盖组件，所述端盖用于盖合所述开口，所述极柱与所述电极组件电连接。
  14. 一种电池，包括：
    根据权利要求13所述的电池单体；以及
    箱体，所述箱体用于容纳所述电池单体。
  15. 一种用电装置，包括根据权利要求14所述的电池。
  16. 一种端盖组件的制造方法，所述制造方法包括：
    提供端盖，所述端盖开设有安装孔，所述安装孔沿所述端盖的厚度方向贯穿所述端盖；
    提供极柱，所述极柱包括主体段；
    提供绝缘件；
    提供第一隔离件和第二隔离件；
    将所述绝缘件沿所述主体段的周向包覆于所述主体段；
    将所述极柱插设于所述安装孔内，以使所述主体段穿设于所述安装孔内；
    将所述第一隔离件和所述第二隔离件分别设置于所述端盖的两侧，以使所述第一隔离件和所述第二隔离件用于配合绝缘隔离所述端盖和所述极柱；
    其中，沿所述端盖的厚度方向，所述第一隔离件和所述第二隔离件在与所述安装孔相对的位置形成有间隙，所述绝缘件的两端均超出所述间隙，所述绝缘件被配置为阻挡所述主体段与进入所述安装孔内的导电介质接触。
  17. 一种端盖组件的制造设备，所述制造设备包括：
    第一提供装置，所述第一提供装置用于提供端盖，所述端盖开设有安装孔，所述安装孔沿所述端盖的厚度方向贯穿所述端盖；
    第二提供装置，所述第二提供装置用于提供极柱，所述极柱包括主体段；
    第三提供装置，所述第三提供装置用于提供绝缘件；
    第四提供装置，所述第四提供装置用于提供第一隔离件和第二隔离件；
    第一组装装置，所述第一组装装置用于将所述绝缘件沿所述主体段的周向包覆于所述主体段；
    第二组装装置，所述第二组装装置用于将所述极柱插设于所述安装孔内，以使所述主体段穿设于所述安装孔内；以及
    第三组装装置，所述第三组装装置用于将所述第一隔离件和所述第二隔离件分别设置于所述端盖的两侧，以使所述第一隔离件和所述第二隔离件用于配合绝缘隔离所述端盖和所述极柱；
    其中，沿所述端盖的厚度方向，所述第一隔离件和所述第二隔离件在与所述安装孔相对的位置形成有间隙，所述绝缘件的两端均超出所述间隙，所述绝缘件被配置为阻挡所述主体段与进入所述安装孔内的导电介质接触。
PCT/CN2022/073581 2021-10-29 2022-01-24 端盖组件、电池单体、电池及用电装置 WO2023070970A1 (zh)

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JP2003086151A (ja) * 2001-09-12 2003-03-20 Japan Storage Battery Co Ltd リチウム電池
US20120148884A1 (en) * 2010-12-09 2012-06-14 Dukjung Kim Secondary battery
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