WO2023039771A1 - 电池单体、电池、用电装置、制备电池单体的方法及设备 - Google Patents

电池单体、电池、用电装置、制备电池单体的方法及设备 Download PDF

Info

Publication number
WO2023039771A1
WO2023039771A1 PCT/CN2021/118623 CN2021118623W WO2023039771A1 WO 2023039771 A1 WO2023039771 A1 WO 2023039771A1 CN 2021118623 W CN2021118623 W CN 2021118623W WO 2023039771 A1 WO2023039771 A1 WO 2023039771A1
Authority
WO
WIPO (PCT)
Prior art keywords
end cap
electrode assembly
battery cell
limiting portion
limiting
Prior art date
Application number
PCT/CN2021/118623
Other languages
English (en)
French (fr)
Inventor
邹启凡
王鹏
秦峰
陈鑫
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 CN202180082070.4A priority Critical patent/CN116569397A/zh
Priority to PCT/CN2021/118623 priority patent/WO2023039771A1/zh
Priority to JP2023505886A priority patent/JP2023544949A/ja
Priority to KR1020237003362A priority patent/KR20230042289A/ko
Priority to EP21951112.8A priority patent/EP4178014A1/en
Publication of WO2023039771A1 publication Critical patent/WO2023039771A1/zh
Priority to US18/328,752 priority patent/US20230307750A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/049—Processes for forming or storing electrodes in the battery container
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M50/152—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
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the technical field of energy storage devices, and in particular to a battery cell, a battery, an electrical device, a method and equipment for preparing a battery cell.
  • the present application provides a battery cell, a battery, an electrical device, a method and equipment for preparing the battery cell, which can enhance the sealing performance of the battery cell and improve the safety and reliability of the battery.
  • the first aspect of the embodiment of the present application provides a battery cell, including: an electrode assembly; a casing for accommodating the electrode assembly, the casing has an opening and a first stopper; an end cap for covering the opening, In the thickness direction of the cover, the end cap is located on the side of the first limiting portion facing the electrode assembly, and the first limiting portion is used to limit the movement of the end cap in a direction away from the electrode assembly; the seal is used to seal the end cap and the first A limiting part, so that the end cover is sealed and connected with the first limiting part; wherein, the end cover includes a cover body and a protruding part, and the protruding part protrudes from the surface of the cover body away from the electrode assembly along the thickness direction of the end cover, sealing At least part of the component is clamped between the protruding portion and the first limiting portion.
  • a protrusion is provided on the surface of the end cover away from the electrode assembly. After the end cover is closed to the opening of the casing, at least part of the sealing member is clamped between the protrusion and the first limiting part, so that the first limiting The sealing part is clamped between the bit part and the protruding part to ensure the sealing performance of the battery cell.
  • the first limiting portion is a flange structure that is partially folded toward the end cover and formed on the side of the end cover facing away from the electrode assembly.
  • the flanging structure enables the folded part of the seal to cover the protruding part, and the flanging structure of the first limiting part covers the sealing, so that the first limiting part and the protruding part can be clamped and jointly extruded the seal, Improve the sealing performance of the battery cell.
  • the first limiting portion includes a connected first portion and a second portion, the first portion covers the protrusion, and the second portion extends from an end of the first portion close to the center of the end cap toward the center of the end cap for a first predetermined amount. distance.
  • the first part completely covers the protruding part
  • the second part extends a first predetermined distance to the center of the end cover, so that the sealing performance of the battery cell is better
  • the width of the second part is the first predetermined distance, which can be on the second part
  • the bus components are connected to realize the electrical connection of multiple battery cells.
  • the second part when the first limiting part is deployed, includes a plurality of notches surrounding the central axis of the housing and arranged at intervals, each notch extending to an end of the second part away from the first part .
  • a plurality of gaps arranged at intervals divides the second part into a plurality of folded parts surrounding the central axis of the housing and arranged at intervals.
  • the first part wraps the protruding part
  • a plurality of folded portions arranged at intervals respectively extend toward the center of the end cover, so as to prevent the second part from forming wrinkles during the folded and smoothed process.
  • the first predetermined distance of the plurality of folded portions extending toward the center of the end cover can be set wider, and when the confluence component is welded to the second part, the area of the welded area increases, Increase the flow area.
  • the notch includes two cutting edges intersecting at a vertex and forming a predetermined angle. After the first limiting portion is folded toward the end cover, the two cutting edges drawn from the vertex are butted to form the second part complete ring structure.
  • the second part covers the upper surface of the end cap to form a complete ring structure. Since there are no wrinkles in the ring structure, when the confluence part is welded to the second part, there will be no false welding and the welding strength will be ensured. Moreover, the second part will not be turned over to the upper surface of the end cap to form a vacancy due to the existence of the gap, and the welding area will not be affected.
  • the housing is further provided with a second limiting portion.
  • the cover body In the thickness direction of the end cap, the cover body is located on the side of the second limiting portion away from the electrode assembly, and the second limiting portion is used to limit the cover body.
  • the relative casing moves in the direction facing the electrode assembly.
  • the second limiting part can prevent the end cover from pressing the tab and avoid damage to the electrode assembly.
  • the seal isolates the end cap from the housing such that the end cap is insulated from the housing.
  • the seal not only seals the end cap and housing, but also insulates the end cap and housing to reduce the risk of short circuits.
  • the shell is a cylindrical shell
  • the protrusions are distributed in a ring around the periphery of the end cap, and the cross-section of the protrusions is semicircular.
  • the protruding part with a semicircular cross-section makes the first limiting part and the sealing part folded toward the end cap, the folded first part can fit the shape of the protruding part more tightly, thereby tightening the sealing part more tightly and improving The sealing performance of the battery cell.
  • the section radius of the protruding portion is R1
  • the length L1 of the first portion satisfies: ⁇ R1 ⁇ L1 ⁇ 10 mm when the first limiting portion is deployed.
  • L1 is greater than the upper half circumference of the semicircular protruding part, which can ensure that the first part completely covers the upper surface of the protruding part and improves the sealing performance; moreover, L1 is less than 10mm, so that the first part is not easy to produce wrinkles after being folded and forms a smooth surface .
  • the radius of the housing is R2, and the length L2 of the second part satisfies: 2mm ⁇ L2 ⁇ R2-6mm when the first limiting part is deployed.
  • the length L2 of the second part is greater than 2mm, so that there is enough welding area when the second part is welded to the confluence part to ensure the flow area of the battery cell; L2 is less than the radius R2 of the housing minus 6mm, even if the second part
  • the end toward the center of the end cap is kept at a distance greater than 6 mm from the center of the end cap, so that the second part will not interfere with other components at the center of the end cap, such as electrode terminals.
  • the second aspect of the embodiment of the present application provides a battery, which is characterized in that it includes a plurality of battery cells according to the first aspect of the present application.
  • the third aspect of the embodiment of the present application provides an electrical device, which is characterized in that it includes the battery according to the second aspect of the application, and the battery is used to provide electric energy.
  • the fourth aspect of the embodiment of the present application provides a method for preparing a battery cell, providing an electrode assembly; providing a casing, the casing has an opening and a first stopper; providing an end cap; providing a seal; and accommodating the electrode assembly in the casing Inside the body; cover the end cap with the opening; wherein, in the thickness direction of the end cap, the end cap is located on the side of the first stop facing the electrode assembly, and the first stop is used to limit the end cap along the direction away from the electrode assembly Direction movement; seal the end cap and the first limiting part with a seal, so that the end cap and the first limiting part are sealed; The surface of the main body away from the electrode assembly protrudes, and at least part of the sealing member is clamped between the protruding portion and the first limiting portion.
  • the fifth aspect of the embodiment of the present application provides an apparatus for preparing a battery cell.
  • the first providing device is used to provide an electrode assembly;
  • the second providing device is used to provide a casing, and the casing has an opening and a first stopper;
  • the third providing device provides the end cap;
  • the fourth providing device provides the seal;
  • the assembly device is used to accommodate the electrode assembly in the casing; and is used to cover the end cap to the opening; wherein, in the thickness direction of the end cap , the end cap is located on the side of the first limiting part facing the electrode assembly, and the first limiting part is used to limit the movement of the end cap in a direction away from the electrode assembly;
  • the end cap and the first limiting part are sealed by a seal so that the end
  • the cover is sealingly connected with the first limiting part;
  • the end cover includes a cover body and a protruding part, the protruding part protrudes from the surface of the cover body away from the electrode assembly along the thickness direction of the
  • Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Fig. 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
  • Fig. 3 is a schematic diagram of explosion of the battery in Fig. 2;
  • Fig. 4 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • Fig. 5 is a schematic diagram of the explosion of the battery cell in Fig. 4;
  • Fig. 6 is a top view of a battery cell according to some embodiments of the present application.
  • Fig. 7 is the A-A direction sectional view of Fig. 6;
  • Fig. 8 is an enlarged view of part I in Fig. 7;
  • Fig. 9 is a cross-sectional view of a housing of some embodiments of the present application.
  • Figure 10 is an enlarged view of Part II in Figure 9;
  • Figure 11 is a cross-sectional view of an end cap of some embodiments of the present application.
  • Fig. 12 is an enlarged view of part III in Fig. 11;
  • Fig. 13 is a flowchart of a method for preparing a battery cell according to some embodiments of the present application.
  • Fig. 14 is a schematic block diagram of a manufacturing device for a battery cell provided by some embodiments of the present application.
  • 500 equipment for preparing battery cells
  • 501 first providing device
  • 502 second providing device
  • 503 third providing device
  • 504 fourth providing device
  • 505 assembling device.
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • power batteries as the core components of vehicles, are related to the safety of vehicles.
  • the safety and reliability of power batteries have become one of the most important criteria for considering the performance of power batteries.
  • 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.
  • Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells.
  • a battery cell generally includes a shell, an electrode assembly, and an end cover.
  • the end cover is provided with an electrode terminal, and the electrode assembly is electrically connected to the electrode terminal. hermetic space.
  • the end cap covers the opening of the casing, and a seal is provided between the end cap and the casing to ensure the sealing performance of the battery cell.
  • the seal also has the function of insulation.
  • the end cover and the shell insulated connection. After the end cap and seal are installed, along the length direction of the battery cell, the part of the shell and the seal that exceeds the end cap is folded toward the end cap, so that the shell forms the first limiter for limiting the end cap , restricting the movement of the end cap away from the electrode assembly, the first limiting portion and the end cap clamp the sealing member, so as to realize the overall sealing of the battery cell.
  • the housing and the end cap can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and the like.
  • the housing was folded toward the end cap to form the first limiting portion, and plastic deformation occurred at the root of the fold, so that the first limiting portion and the end cap tightened the seal to form a seal. Due to the characteristics of the housing material, the first limiting part will warp during use and cannot clamp the sealing member, which will affect the sealing performance of the battery cell as a whole.
  • the applicant improved the structure of the battery cell, provided a protruding part on the end cover, and when the casing was folded toward the end cover, the sealing member was clamped between the first limiting part and the protruding part. Between parts, thereby improving the sealing performance of the battery cell.
  • the embodiments of the present application are further described below.
  • the battery cells described in the embodiments of the present application are applicable to batteries and devices using batteries.
  • Devices that use batteries can be vehicles, mobile phones, portable devices, notebook computers, ships, spacecraft, electric toys and power tools, and so on.
  • Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles;
  • spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.;
  • electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more.
  • the embodiments of the present application do not impose special limitations on the above-mentioned devices using batteries.
  • the device using a battery is taken as an example for description.
  • Fig. 1 is a schematic structural diagram of a vehicle 1 provided by some embodiments of the present application.
  • a battery 2 is provided inside a vehicle 1, and a battery 2 refers to a single physical module including one or more battery cells to provide higher voltage and capacity, for example, the one mentioned in this application
  • the battery 2 may include a battery module or a battery pack or the like.
  • the battery 2 can be arranged at the bottom or the head or the tail of the vehicle 1 .
  • the battery 2 can be used for power supply of the vehicle 1 , for example, the battery 2 can be used as an operating power source of the vehicle 1 .
  • the vehicle 1 may also include a controller 3 and a motor 4 , the controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.
  • the battery 2 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 to provide driving power for the vehicle 1 instead of or partially replacing fuel oil or natural gas.
  • FIG. 2 is a schematic structural diagram of a battery 2 provided by some embodiments of the present application.
  • FIG. 3 is an explosion schematic diagram of the battery 2 in FIG. 2 .
  • the battery 2 includes a case body 10 and a battery cell 20 , and the battery cell 20 is housed in the case body 10 .
  • the box body 10 is used to accommodate the battery cells 20, and the box body 10 may have various structures.
  • the box body 10 includes a barrel body 11 , a first cover body 12 and a second cover body 13 .
  • the first cover 12 and the second cover 13 are respectively disposed on two ends of the cylinder 11 .
  • the first cover 12 and the second cover 13 are detachably connected to the cylinder 11 respectively.
  • the first cover body 12 and the second cover body 13 can be engaged with the cylinder body 11 respectively or connected with screws.
  • the cylinder body 11 , the first cover body 12 and the second cover body 13 are assembled to form an accommodation space.
  • the battery cells 20 are disposed in the accommodation space of the housing box 10 .
  • the plurality of battery cells 20 may be connected in series, in parallel or in parallel.
  • the mixed connection means that the plurality of battery cells 20 are both 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, a plurality of battery cells 20 can also be connected in series first Or parallel or mixed connection to form a battery pack, and multiple battery packs are connected in series, parallel or mixed to form a whole, and accommodated in the box body 10 .
  • the number of battery cells 20 can be set to any value.
  • a plurality of battery cells 20 can be connected in series, in parallel or in parallel to achieve greater capacity or power.
  • a plurality of battery cells 20 can also be connected in series, parallel or mixed to form a battery module, and then a plurality of battery modules can be connected in series, parallel or mixed to form a battery 2 . That is to say, a plurality of battery cells 20 can directly form the battery 2 , or can first form a battery module, and the battery module then forms the battery 2 and is accommodated in the box body 10 .
  • a plurality of battery cells 20 are electrically connected through a bus member 30 to realize the design voltage of the battery 2 .
  • a plurality of battery cells 20 are electrically connected, which may be connected in series, parallel or mixed (mixed connection of series and parallel), and the battery cells 20 are connected through a bus component 30 .
  • the battery cells 20 include electrode terminals, and each of the battery cells 20 includes a positive electrode terminal and a negative electrode terminal.
  • the positive electrode terminal of the battery cell 20 and the negative electrode terminal of the adjacent battery cell 20 are connected through the bus member 30 .
  • the structure of the flow-combining component 30 is determined by the arrangement of the battery cells 20 and the connection between the battery cells 20 .
  • the specific connection manner of the battery cells 20 is not limited in this application.
  • the bus component 30 may be a metal conductor, such as copper, iron, aluminum, stainless steel, aluminum alloy, and the like.
  • FIG. 4 is a schematic structural diagram of a battery cell 20 provided by some embodiments of the present application.
  • FIG. 5 is an exploded schematic view of the battery cell 20 in FIG. 4 .
  • the battery cell 20 refers to the smallest component unit used to form the battery 2.
  • the battery cell 20 may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell , a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., which are not limited in this embodiment of the present application.
  • the battery cell 20 may be in the form of a cylinder, a flat body, a cuboid or other shapes.
  • the cylindrical battery cell 20 is used as an example in the following embodiments.
  • the battery cell 20 includes an end cap 21 , an electrode assembly 22 and a casing 23 .
  • the casing 23 is used to accommodate the electrode assembly 22 in the casing 23 .
  • the shell 23 can be of various shapes and sizes. Specifically, the shape of the shell 23 can be determined according to the specific shape and size of one or more electrode assemblies 22 .
  • the housing 23 is a hollow cylinder.
  • One end of the casing 23 is an opening 231 , and the end cap 21 covers the opening 231 and is connected with the casing 23 to form a closed cavity for placing the electrode assembly 22 .
  • the cavity may be filled with electrolyte.
  • the end cap 21 is provided with electrode terminals, and the electrode assembly 22 is provided with tabs 221 , and the electrode terminals can be used to electrically connect with the tabs 221 for outputting electric energy of the battery cells 20 .
  • Each electrode terminal may be correspondingly provided with a current collecting member, and the current collecting member may be located between the end cap 21 and the tab 221 , so that the electrode terminal and the tab 221 may be electrically connected through the current collecting member.
  • the end cap 21 may also be provided with other functional components, for example, a pressure relief mechanism for releasing the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value.
  • the housing 23 and the end cover 21 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy and the like.
  • the end of the casing 23 along the length direction X of the battery cell has a first stopper 232 , and after the electrode assembly 22 is installed in the casing 23 , the end cover 21 is closed. To the opening 231 of the casing 23 , the first limiting portion 232 is folded toward the end cap 21 to restrict the end cap 21 from moving away from the electrode assembly 22 .
  • a seal 24 (see FIG. 7 ) is also provided between the end cover 21 and the casing 23 to ensure the sealing performance of the battery cell 20 .
  • the part of the housing 23 and the sealing member 24 that exceeds the end cap 21 is folded toward the end cap 21, so that the housing 21 forms a first position limiter for the end cap 23.
  • part 232 , the first limiting part 232 and the end cover 21 clamp the sealing member 24 so as to realize the overall sealing of the battery cell 20 .
  • the first stopper 232 When the first stopper 232 is turned toward the end cover 21, plastic deformation occurs at the root of the turnover, so that the first stopper 232 and the end cover 21 clamp the seal to form a seal. Due to the characteristics of the material of 23, the first limiting part 232 will warp during use, and cannot clamp the sealing member 24, which will affect the sealing performance of the battery cell 20 as a whole.
  • a protruding part 212 is provided on the end cover 21 (see Fig. 7 and Fig. 8), the first When the limiting portion 232 is folded toward the end cover 21 , the sealing member 24 is clamped between the first limiting portion 232 and the protruding portion 212 to improve the sealing performance of the battery cell 20 .
  • FIG. 6 is a top view of a battery cell 20 according to some embodiments of the present application
  • FIG. 7 is a sectional view taken along the line A-A of FIG. 6
  • FIG. 8 is an enlarged view of part I in FIG. 7 .
  • the battery cell 2 of some embodiments of the present application includes: an electrode assembly 22 , an end cap 21 , a casing 23 and a sealing member 24 .
  • the electrode assembly 22 is accommodated in the housing 23, the housing 23 has a first stopper 232, the end cap 21 covers the opening 231 of the housing 23, in the thickness direction of the end cap 23 (with the cell length direction X same), the end cap 21 is located on the side of the first stopper 232 facing the electrode assembly 22, the first stopper 232 restricts the movement of the end cap 21 in a direction away from the electrode assembly 22; the seal 24 is used to seal the end cap 21 and The first limiting portion 232 is used to seal the end cover 21 and the first limiting portion 232 .
  • the end cap 21 includes a cap body 211 and a protruding portion 212, the protruding portion 212 protrudes from the surface of the cap body 211 away from the electrode assembly 22 along the thickness direction of the end cap 21, and at least the sealing member 24 Part of it is clamped between the protruding portion 212 and the first limiting portion 232 .
  • a protruding portion 212 is provided on the surface of the end cap 21 facing away from the electrode assembly 22. After the end cap 21 is closed to the opening 231 of the housing 23, at least part of the sealing member 24 is clamped between the protruding portion 212 and the first stop. Between the portions 232 , the first limiting portion 232 and the protruding portion 212 clamp the sealing member 24 to ensure the sealing performance of the battery cell 20 .
  • the first limiting portion 232 is a flange structure formed on the side of the end cap 21 facing away from the electrode assembly 22 by partially folding the casing 23 toward the end cap 21 .
  • the first stop portion 232 of the housing and the sealing member 24 are folded together toward the end cover 21 to form a flanging structure, so that the folded part of the sealing member 24 covers the convex
  • the protruding portion 212 and the flanging structure of the first limiting portion 232 cover the sealing member 24, so that the first limiting portion 232 and the protruding portion 212 can clamp and jointly squeeze the sealing member 24, thereby improving the stability of the battery cell 20. Sealing performance.
  • the first limiting portion 232 includes a connected first portion 2321 and a second portion 2322 , the first portion 2321 covers the protrusion 212 , and the second portion 2322 extends from the first portion.
  • the end 2323 of the end cover 21 close to the center of the end cover 21 extends a first predetermined distance L toward the center of the end cover 21 .
  • the center position of the end cover 21 is located on the central axis Y of the housing 23 (see the dotted line in FIG. 7 ).
  • the direction toward the center of the end cover 21 is the radial direction R of the housing 23 ( See the arrow direction above the end cap 21 in Figure 7).
  • the portion covering the protruding portion 212 forms a first portion 2321
  • the portion extending from the end portion 2323 of the first portion 2321 toward the central axis Y forms a second portion 2322 .
  • the first part 2321 completely covers the protruding part 212
  • the second part extends to the center of the end cover 21 for a first predetermined distance L, so that the sealing performance of the battery cell 20 is better
  • the width of the second part 2322 is the first predetermined distance L
  • the busbar 30 can be connected to the second part 2322 , so as to realize the electrical connection of a plurality of battery cells 20 .
  • the bus component 30 can be welded on the second part 2322 by welding.
  • the end of the first stopper 232 extends toward the center of the end cover (direction of the central axis Y), and the end of the first stopper 232 faces toward the center of the end cover.
  • the diameter of the portion decreases gradually, but since the housing 23 is a complete cylindrical tubular structure before it is folded toward the end cap 21, its diameter is a fixed value, therefore, after the fold, the first limiting portion 232 will shrink toward the center of the end cap, resulting in wrinkles, so that the first stopper 232 cannot be completely smoothed out, resulting in a false weld that is likely to occur when the first stopper 232 is welded to the busbar 30, affecting the battery. 2 Overall connection strength, there is a risk of short circuit.
  • the shell 23 is usually made of metal material, due to the characteristics of the metal material, when it is folded toward the center of the end cover, the width of the flanging structure of the first limiting portion 232 is usually smaller, and the first limiting portion 232 is usually smaller.
  • the position portion 232 is welded to the bus member 30 , due to the narrow flange structure, the area of the welded area is relatively small, so that the flow area of the battery cell 20 is small.
  • FIG. 9 is a cross-sectional view of the housing 23 of some embodiments of the present application.
  • the second portion 2322 It includes a plurality of notches 234 arranged at intervals around the central axis Y of the casing 23 , and each notch 234 extends to an end of the second part 2322 away from the first part 2321 .
  • a plurality of gaps 234 arranged at intervals divides the second part 2322 into a plurality of folded parts 2324 arranged at intervals around the central axis Y of the housing 23.
  • the first limiting part 232 is folded toward the end cover 21
  • the first predetermined distance L extending from the plurality of folded portions 2324 toward the center of the end cover can be set wider. The area area increases, increasing the flow area.
  • Fig. 10 is an enlarged view of part II in Fig. 9 .
  • the notch 234 includes two cutting edges 2341 intersecting at a vertex P and forming a predetermined angle.
  • the two cut edges 2341 of the two butt joints make the second part 2322 form a complete ring structure, as shown in FIG. 6 .
  • the two cut sides 2341 of the notch 234 are butted and overlapped after the first stopper 232 is folded toward the end cover 21, so that the second part 2322 covers the upper surface of the end cover 21 to form a complete ring structure. Since there are no wrinkles in the ring structure, Therefore, when the flow-combining component 30 is welded to the second part 2322 , there will be no false welding and the welding strength can be ensured. Moreover, the existence of the notch 234 will not cause the second portion 2322 to be turned over to the upper surface of the end cover 21 to form a void, and will not affect the area of the welding area.
  • the number N of notches 234 can be set to be greater than or equal to 4, and the angle ⁇ between the two cut sides 2341 of the notches 234 varies according to the number of notches 234.
  • the specific angle ⁇ and the number N can be seen in Table 1 below.
  • the setting of the included angle ⁇ and the number N can be set according to the external dimensions of the battery cell 20.
  • the radius R2 (see FIG. 9) of the housing 23 is larger, the number N can be set larger.
  • the housing 23 When the radius R2 of is small, the number N can be set relatively small, so that it can be flexibly set according to the external dimensions of the battery cells 20 .
  • the casing 23 is further provided with a second limiting portion 233 , in the thickness direction of the end cover 21 (battery cell length direction X), the cover body 211 is positioned at the second position.
  • the second limiting portion 233 is away from the side of the electrode assembly 22 , and the second limiting portion 233 is used to limit the movement of the cover body 211 relative to the housing 23 in a direction facing the electrode assembly 22 .
  • the second limiting portion 233 can prevent the end cover 21 from pressing the tab 221 and avoid damaging the electrode assembly 22 .
  • the second limiting portion 233 is formed between the shell body 235 of the housing 23 and the first limiting portion 232 .
  • the second limiting portion 233 may be an annular structure protruding from the inner peripheral surface of the shell body 235 .
  • a roller groove 2331 is formed on the outer peripheral surface of the shell body 235 at a position corresponding to the second limiting portion 233 .
  • the roller groove 2331 can be rolled out on the outer peripheral surface of the shell body 235 by rolling, and the second convex limiting portion 233 can be formed on the inner peripheral surface of the shell body 235 .
  • the chargeability of the end cap 21 is opposite to that of the shell 23.
  • the shell 23 is positively charged, or if the end cap 21 is positively charged, the shell 23 is negatively charged.
  • Electric charge in order to avoid short circuit due to the contact between the end cover 21 and the housing 23 , it is necessary to insulate the end cover 21 and the housing 23 .
  • the sealing member 24 isolates the end cover 21 from the housing 23 , so that the end cover 21 is insulated from the housing 23 . While sealing the end cover 21 and the housing 23 , the sealing member 24 realizes the insulation of the end cover 21 and the housing 23 to reduce the risk of short circuit.
  • the seal 24 is a cylindrical structure that matches the inner surface of the housing 23, the end cover 21 is installed inside the seal 24, and the seal 24 completely separates the housing 23 and the end cover 21, thereby realizing insulation purpose.
  • one end of the sealing member 24 is located in the middle of the second limiting portion 233 , and the other end extends a second predetermined distance ⁇ L from the end of the second portion 2322 close to the center of the end cap. Specifically, the second predetermined distance ⁇ L ⁇ 5mm.
  • the sealing member 24 can be made of polymer plastics such as polyethylene, polypropylene, polytetrafluoroethylene, etc. In a specific embodiment, the sealing member 24 can be made of polyethylene material with a thickness of 0.8 mm.
  • the edge of the end cap 21 facing the electrode assembly 22 is moved away from the second limiting portion 233 along the length direction X of the battery cell.
  • the end of the electrode assembly 22 is supported, and the end of one side of the sealing member 24 is located in the middle of the second limiting portion 233, which can completely isolate the surface of the end cover 21 facing the electrode assembly 22 from the casing 23, and the sealing member 24 has been extended to
  • the end of the second part 2322 close to the center of the end cap protrudes a second predetermined distance ⁇ L, so that the surface of the end cap 21 away from the electrode assembly 22 can be completely isolated from the casing 23, avoiding the contact between the end cap 21 and the casing 23, achieve adequate insulation.
  • FIG. 11 is a cross-sectional view of the end cap 21 of some embodiments of the present application;
  • FIG. 12 is an enlarged view of part III in FIG. 11 .
  • the housing 23 is a cylindrical housing
  • the end cap 21 is a circular end cap suitable for the opening 231
  • the protrusion 212 forms a ring around the periphery of the end cap 21.
  • the cross section of the protruding portion 212 is semicircular, and the protruding portion 212 of the semicircular cross section makes the first stopper 232 and the sealing member 24 turn over toward the end cap 21, the first part 2321 that is turned over can be
  • the shape of the protruding part 212 is more fitted, so that the sealing part 24 is tightened more tightly, and the sealing performance of the battery cell 20 is improved.
  • the section radius of the protruding portion 212 is R1, and the length L1 of the first portion 2321 satisfies: ⁇ R1 ⁇ L1 ⁇ 10 mm when the first limiting portion 232 is unfolded.
  • the length L1 of the first part 2321 is greater than ⁇ R1, that is, L1 is greater than the upper half circumference of the semicircular protruding part 212, which can ensure that the first part 2321 completely covers the upper surface of the protruding part 212 to improve the sealing performance; and, L1 is less than 10 mm, After the first part 2321 is folded, it is not easy to produce wrinkles, forming a smooth surface.
  • R1 is equal to 2mm, so as to reduce the impact on the connection of the battery cell 20 with other components such as the bus component 30 .
  • the radius of the housing is R2.
  • the length L2 of the second part 2322 satisfies: 2mm ⁇ L2 ⁇ R2-6mm .
  • the length L2 of the second part 2322 is greater than 2mm, so that there is enough welding area when the second part 2322 is welded and connected with the confluence part 30, so as to ensure the flow area of the battery cell 20; L2 is less than the radius R2 of the housing 23 minus 6mm Keep the end of the second part 2322 toward the center of the end cap 21 at a distance greater than 6mm from the center of the end cap 21, so that the second part 2322 will not interfere with other components at the center of the end cap 21, such as electrode terminals.
  • FIG. 13 is a flowchart of a method for preparing a battery cell 20 according to some embodiments of the present application.
  • the embodiment of the present application provides a method for preparing a battery cell 20, including the following steps:
  • Step S1 providing an electrode assembly 22
  • Step S2 providing a casing 23, the casing 23 has an opening 231 and a first limiting portion 232;
  • Step S3 providing an end cap 21
  • Step S4 providing a seal 24
  • Step S5 accommodating the electrode assembly 22 in the casing 23;
  • Step S6 closing the end cap 21 on the opening 231;
  • the end cap 21 in the thickness direction of the end cap 21, the end cap 21 is located on the side of the first limiting portion 232 facing the electrode assembly 22, and the first limiting portion 232 is used to limit the movement of the end cap 21 in a direction away from the electrode assembly 22; Utilize the sealing member 24 to seal the end cover 21 and the first stopper 232, so that the end cover 21 and the first stopper 232 are hermetically connected; the end cover 21 includes a cover body 211 and a protrusion 212, and the protrusion 212 is along the end The thickness direction of the cover 21 protrudes from the surface of the cover body 211 facing away from the electrode assembly 22 , and at least part of the sealing member 24 is clamped between the protruding portion 212 and the first limiting portion 232 .
  • step S1, step S2, step S3 and step S4 is not limited, for example, step S4 may be performed first, then step S3, then step S2, and then step S1.
  • a protruding portion 212 is provided on the surface of the end cap 21 facing away from the electrode assembly 22. Clamped between the protruding portion 212 and the first limiting portion 232 , the first limiting portion 232 and the protruding portion 212 clamp the sealing member 24 to ensure the sealing performance of the battery cell 20 .
  • FIG. 14 is a schematic block diagram of a device 500 for preparing a battery cell 20 provided by some embodiments of the present application.
  • the embodiment of the present application also provides a device 500 for preparing battery cells, including: a first providing device 501, a second providing device 502, a third providing device 503, a fourth providing device 504, and an assembly device 505.
  • the first providing device 501 is used to provide the electrode assembly 22; the second providing device 502 is used to provide the housing 23, and the housing 23 has an opening 231 and a first limiting portion 232; the third providing device 503 is used to provide the end cap 21 ; the fourth providing device 504, which provides the seal 24; the assembly device 505, which is used to accommodate the electrode assembly 22 in the casing 23; and is used to cover the end cover 21 on the opening 231; Above, the end cap 21 is located on the side of the first limiting portion 232 facing the electrode assembly 22, the first limiting portion 232 is used to limit the movement of the end cap 21 in a direction away from the electrode assembly 22; the sealing member 24 is used to seal the end cap 21 and The first limiting portion 232 is used to seal the end cap 21 and the first limiting portion 232; The surface facing away from the electrode assembly 22 protrudes, and at least part of the sealing member 24 is sandwiched between the protruding portion 212 and the first limiting portion 232 .
  • the protruding part 212 is provided on the surface of the end cover 21 away from the electrode assembly 22. After the end cover 21 is closed to the opening of the casing 23, at least The part is clamped between the protruding portion 212 and the first limiting portion 232 , so that the first limiting portion 232 and the protruding portion 212 clamp the sealing member 24 to ensure the sealing performance of the battery cell 20 .

Landscapes

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

Abstract

本申请涉及一种电池单体、电池、用电装置、制备电池单体的方法及设备，该电池单体包括：电极组件；壳体，用于容纳电极组件，壳体具有开口和第一限位部；端盖，用于盖合开口，在端盖的厚度方向上，端盖位于第一限位部面向电极组件的一侧，第一限位部用于限制端盖沿背离电极组件的方向移动；密封件，用于密封端盖和第一限位部，以使端盖和第一限位部密封连接；其中，端盖包括盖本体和凸出部，凸出部沿端盖的厚度方向从盖本体背离电极组件的表面凸出，密封件的至少部分夹持于凸出部和第一限位部之间，提高电池单体的密封性。

Description

电池单体、电池、用电装置、制备电池单体的方法及设备 技术领域
本申请涉及储能器件技术领域，尤其涉及一种电池单体、电池、用电装置、制备电池单体的方法及设备。
背景技术
节能减排是汽车产业可持续发展的关键。在这种情况下，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。而对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。保持电池单体的密封性，提高电池的安全性、可靠性至关重要。
发明内容
为了解决上述问题，本申请提供一种电池单体、电池、用电装置、制备电池单体的方法及设备，能够增强电池单体的密封性，提高电池的安全性和可靠性。
本申请实施例第一方面提供一种电池单体，包括：电极组件；壳体，用于容纳电极组件，壳体具有开口和第一限位部；端盖，用于盖合开口，在端盖的厚度方向上，端盖位于第一限位部面向电极组件的一侧，第一限位部用于限制端盖沿背离电极组件的方向移动；密封件，用于密封端盖和第一限位部，以使端盖和第一限位部密封连接；其中，端盖包括盖本体和凸出部，凸出部沿端盖的厚度方向从盖本体背离电极组件的表面凸出，密封件的至少部分夹持于凸出部和第一限位部之间。
在端盖的背离电极组件的表面设置凸出部，端盖盖合至壳体的开口后，使密封件的至少部分夹持于凸出部和第一限位部之间，使第一限位部和凸出部夹紧密封件，保证电池单体的密封性能。
在一些实施例中，第一限位部为壳体局部向端盖翻折并在端盖背离电极组件的表面一侧形成的翻边结构。
翻边结构使密封件翻折部分包覆凸出部，第一限位部的翻边结构包覆密封件，从而能够使第一限位部和凸出部夹紧并共同挤压密封件，提高电池单体的密封性能。
在一些实施例中，第一限位部包括相连的第一部分和第二部分，第一部分包覆凸出部，第二部分从第一部分靠近端盖中心的端部朝向端盖中心延伸第一预定距离。
第一部分完全包覆凸出部，第二部分向端盖中心延伸第一预定距离，使电池单体的密封性能更好，并且第二部分的宽度为第一预定距离，可以在第二部分上连接汇流部件，从而实现多个电池单体的电连接。
在一些实施例中，在第一限位部展开的状态下，第二部分包括环绕壳体的中轴线且间隔设置的多个缺口，每个缺口均延伸至第二部分远离第一部分的端部。
间隔设置的多个缺口使第二部分分割为多个环绕壳体的中轴线且间隔设置的翻折部，当第一限位部向端盖方向翻折后，第一部分包覆凸出部后，多个间隔设置的翻折部分别向端盖中心方向延伸，从而避免第二部分在翻折抚平过程中形成褶皱。并且，由于设置多个缺口，使多个翻折部向端盖中心方向延伸的第一预定距离可以设置的较宽，在将汇流部件与第二部分进行焊接连接时，焊接区域面积增大，提高过流面积。
在一些实施例中，缺口包括相交于一个顶点且成预定角度的两条切边，在第一限位部向端盖翻折后，从顶点引出的两条切边对接以使第二部分形成完整的环形结构。
使第二部分覆盖端盖上表面形成完整的环形结构，该环形结构由于不存在褶皱，从而在汇流部件与第二部分焊接时，不会产生虚焊，保证焊接强度。并且，也不会由于缺口的存在而导致第二部分翻折至端盖上表面后形成空缺，不会影响焊接区域面积。
在一些实施例中，壳体还设有第二限位部，在端盖的厚度方向上，盖本体位于第二限位部背离电极组件的一侧，第二限位部用于限制盖本体相对壳体沿面向电极组件的方向移动。
第二限位部可以起到防止端盖挤压极耳，避免伤害电极组件的作用。
在一些实施例中，密封件隔离端盖和壳体，以使端盖与壳体绝缘连接。
密封件对端盖和壳体进行密封的同时，又实现对端盖和壳体的绝缘，以降低短路风险。
在一些实施例中，壳体为圆柱型壳体，凸出部环绕端盖周边呈环状分布，凸出部的截面为半圆形。
半圆形截面的凸出部使第一限位部和密封件向端盖方向翻折时，翻折的第一部分能够更贴合凸出部的形状，从而更紧密地将密封部加紧，提高电池单体的密封性能。
在一些实施例中，凸出部的截面半径为R1，在第一限位部展开的状态下，第一部分的长度L1满足：π×R1<L1<10mm。
即L1大于半圆凸出部的上半周长，能够保证第一部分完全包覆凸出部的上表面，提高密封性；并且，L1小于10mm，使第一部分翻折后不易产生褶皱，形成光滑的表面。
在一些实施例中，壳体的半径为R2，在第一限位部展开的状态下，第二部分的长度L2满足：2mm<L2<R2-6mm。
第二部分的长度L2大于2mm，能够使第二部分与汇流部件焊接连接时有足够的焊接区域，保证电池单体的过流面积；L2小于壳体的半径R2减去6mm，即使第二部分朝向端盖的中心的端部与端盖的中心保持大于6mm的距离，从而使第二部分不会与端盖中心的其他部件例如电极端子等产生干涉。
本申请实施例第二方面提供一种电池，其特征在于，包括多个如本申请第一方面的电池单体。
本申请实施例第三方面提供一种用电装置，其特征在于，包括如本申请第二方面的电池，电池用于提供电能。
本申请实施例第四方面提供一种制备电池单体的方法，提供电极组件；提供壳体，壳体具有开口和第一限位部；提供端盖；提供密封件；将电极组件容纳于壳体内；将端盖盖合于开口；其中，在端盖的厚度方向上，端盖位于第一限位部面向电极组件的一侧，第一限位部用于限制端盖沿背离电极组件的方向移动；利用密封件密封端盖和第一限位部，以使端盖和第一限位部密封连接；端盖包括盖本体和凸出部，凸出部沿端盖的厚度方向从盖本体背离电极组件的表面凸出，密封件的至少部分夹持于凸出部和第一限位部之间。
本申请实施例第五方面提供一种制备电池单体的设备，第一提供装置，用于提供电极组件；第二提供装置，用于提供壳体，壳体具有开口和第一限位部；第三提供装置，提供端盖；第四提供装置，提供密封件；组装装置，用于将电极组件容纳于壳体内；并用于将端盖盖合于开口；其中，在端盖的厚度方向上，端盖位于第一限位部面向电极组件的一侧，第一限位部用于限制端盖沿背离电极组件的方向移动；利用密封件密封端盖和第一限位部，以使端盖和所述第一限位部密封连接；端盖包括盖本体和凸出部，凸出部沿端盖的厚度方向从盖本体背离电极组件的表面凸出，密封件的至少部分夹持于凸出部和第一限位部之间。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需使用的附图作简单地介绍，显而易见，以下描述的附图仅仅是本申请的具体实施例，本领域技术人员在不付出创造性劳动的前提下，可以根据以下附图获得其他实施例。
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示意图；
图3为图2中电池的爆炸示意图；
图4为本申请一些实施例提供的电池单体的结构示意图；
图5为图4中的电池单体的爆炸示意图；
图6为本申请一些实施例的电池单体的俯视图；
图7为图6的A-A向剖视图；
图8为图7中的Ⅰ部放大图；
图9为本申请一些实施例的壳体的剖视图；
图10为图9中的Ⅱ部放大图；
图11为本申请一些实施例的端盖的截面图；
图12为图11中Ⅲ部放大图；
图13为本申请一些实施例的制备电池单体的方法流程图；
图14为本申请一些实施例提供的电池单体的制造设备的示意性框图。
附图标记：
1-车辆、2-电池、3-控制器、4-马达；
10-箱体、20、电池单体、30、汇流部件；
11-筒体、12-第一盖体、13-第二盖体；
21-端盖、211-盖本体、212-凸出部；
22-电极组件、221-极耳；
23-壳体、231-开口、232-第一限位部、2321-第一部分、2322-第二部分、2323-第一部分靠近端盖中心的端部、2324-翻折部、233-第二限位部、2331-辊槽、234-缺口、2341-切边、235-壳本体；
24-密封件；
500-制备电池单体的设备、501-第一提供装置、502-第二提供装置、503-第三提供装置、504-第四提供装置、505-组装装置。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本 申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为了更好地理解本申请的技术方案，下面结合附图对本申请实施例进行详细描述。
应当明确，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。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它实施例，都属于本申请保护的范围。
在本申请实施例中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。在本申请实施例和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。
应当理解，本文中使用的术语“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，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
需要注意的是，本申请实施例所描述的“上”、“下”、“左”、“右”等方位词是以附图所示的角度来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
在如电动汽车等电动载具领域，动力电池作为车辆的核心部件，关乎 用车的安全，动力电池的安全性、可靠性，成为考量动力电池性能最重要的标准之一。
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。
目前，电池单体一般包括壳体、电极组件和端盖，端盖上设有电极端子，电极组件与电极端子电连接，端盖盖合于壳体的开口，以为电极组件和电解液提供一个密闭空间。
对于圆柱型电池单体，端盖盖合于壳体的开口，在端盖与壳体之间还设置有密封件，以保证电池单体的密封性能，通常，密封件也具有绝缘的作用，以使端盖和壳体绝缘连接。安装好端盖和密封件后，沿电池单体长度方向，壳体和密封件超出端盖的部分，向端盖方向翻折，使壳体形成对端盖进行限位的第一限位部，限制端盖向背离电极组件方向运动，第一限位部和端盖将密封件夹紧，以实现电池单体的整体密封。壳体和端盖的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金等。
申请人注意到，壳体向端盖方向翻折形成第一限位部，在翻折的根部位置产生塑性变形，从而使第一限位部和端盖将密封件加紧，形成密封，但由于壳体材料的特性，第一限位部会在使用中产生翘起，而无法夹紧密封件，影响电池单体整体的密封性能。
为了解决上述问题，申请人对电池单体的结构进行了改进，在端盖上设置凸出部，壳体向端盖方向翻折时，将密封件夹持于第一限位部与凸出部之间，从而提高电池单体的密封性能。下面对本申请实施例进行进一步描述。
本申请实施例描述的电池单体适用于电池以及使用电池的装置。
使用电池的装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、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；航 天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具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；电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述使用电池的装置不做特殊限制。
以下实施例为了方便说明，以使用电池的装置为车辆为例进行说明。
图1为本申请一些实施例提供的车辆1的结构示意图。
如图1所示，车辆1的内部设置有电池2，电池2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2可以包括电池模块或电池包等。电池2可以设置在车辆1的底部或头部或尾部。电池2可以用于车辆1的供电，例如，电池2可以作为车辆1的操作电源。车辆1还可以包括控制器3和马达4，控制器3用来控制电池2为马达4供电，例如，用于车辆1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2不仅仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，代替或部分地代替燃油或天然气为车辆1提供驱动动力。
图2为本申请一些实施例提供的电池2的结构示意图。图3为图2中电池2的爆炸示意图。
如图2和图3所示，电池2包括箱体10和电池单体20，电池单体20容纳于箱体10内。
箱体10用于容纳电池单体20，箱体10可以是多种结构。在一些实施例中，箱体10包括筒体11、第一盖体12和第二盖体13。第一盖体12和第二盖体13分别设置于筒体11的两端。第一盖体12和第二盖体13分别与筒体11可拆卸连接。例如，第一盖体12和第二盖体13可以分别与筒体11卡接或者使用螺钉连接。筒体11、第一盖体12和第二盖体13组装后形成容纳空间。电池单体20设置于外壳箱体10的容纳空间内。
在电池2中，电池单体20为多个。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，也可以是多个电池单体20先串联或并联或混联组成电池组，多个电池组再串联或并联或混联形成一个整体，并容纳于箱体10内。
根据不同的电力需求，电池单体20的数量可以设置为任意数值。多个电池单体20可通过串联、并联或混联的方式连接以实现较大的容量或功率。多个电池单体20还可以先串联或并联或混联组成电池模块，多个电池模块再串联或并联或混联组成电池2。也就是说，多个电池单体20可以直接组成电池2，也可以先组成电池模块，电池模块再组成电池2，并容纳于箱体10内。
如图3所示，多个电池单体20通过汇流部件30进行电连接来实现电池2的设计电压。在电池2中，多个电池单体20之间电连接，具体可采用串联、并联或混联(串联和并联混合连接)等连接方式，且电池单体20之间通过汇流部件30连接。电池单体20包括电极端子，且各电池单体20均包括正极电极端子和负极电极端子。例如，当电池单体20串联时，电池单体20的正极电极端子和与其相邻的电池单体20的负极电极端子通过汇流部件30连接。汇流部件30的结构由多个电池单体20的排列形式和电池单体20之间的连接方式决定。本申请中对电池单体20的具体连接方式不作限定。汇流部件30可以是金属导体，比如，铜、铁、铝、不锈钢、铝合金等。
图4为本申请一些实施例提供的电池单体20的结构示意图。图5为图4中的电池单体20的爆炸示意图。
请参见图4，电池单体20是指用以组成电池2的最小组成单元，在本申请的一些实施例中，电池单体20可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、钠锂离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此不限定。电池单体20可呈圆柱体、扁平体、长方体或其它形状等，为便于说明，在下述实施例中均以圆柱型的电池单体20为示例。
请参照图4和图5，电池单体20包括端盖21、电极组件22和壳体23。壳体23用于将电极组件22容纳于壳体23内。壳体23可以是多种形状和多种尺寸的，具体地，壳体23的形状可以根据一个或多个电极组件22的具体形状和尺寸大小来确定。在一些实施例中，壳体23为中空的圆柱体。壳体23的一端为开口231，端盖21覆盖该开口231并且与壳体23连接，形成放置电极组件22的封闭的腔体。腔体内可以填充有电解液。在一些实施例中，端盖21上设置有电极端子，电极组件22上设置有极耳221，电极端子可以用于与极耳221电连接，以用于输出电池单体20的电能。每个电极端子可以对应设置有集流构件，可以使该集流构件位于端盖21和极耳221之间，以使电极端子和极耳221可以通过集流构件实现电连接。端盖21还可以设置有其他功能性部件，例如，用于在电池单体20的内部压力或温度达到阈值时泄放内部压力的泄压机构。壳体23和端盖21的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金等。
请继续参照图4，在一些实施例中，壳体23沿电池单体长度方向X的端部具有第一限位部232，电极组件22安装至壳体23内后，将端盖21盖合至壳体23的开口231，第一限位部232向端盖21方向翻折，以限制端盖21沿背离电极组件22的方向移动。
在一些实施例中，在端盖21与壳体23之间还设置有密封件24(见图7)，以保证电池单体20的密封性能。安装好端盖21和密封件24后，壳体23和密封件24超出端盖21的部分，向端盖21方向翻折，使壳体21形成对端盖23进行限位的第一限位部232，第一限位部232和端盖21将密封件24夹紧，以实现电池单体20的整体密封。
第一限位部232向端盖21方向翻折时，在翻折的根部位置产生塑性变形，从而使第一限位部232和端盖21将密封件夹紧，形成密封，但由于壳体23材料的特性，第一限位部232会在使用中产生翘起，而无法夹紧密封件24，影响电池单体20整体的密封性能。
为了解决第一限位部232翘起而导致电池单体20密封不严的问题，本 申请一些实施例中，在端盖21上设置凸出部212(见图7和图8)，第一限位部232向端盖21方向翻折时，将密封件24夹持于第一限位部232与凸出部212之间，来提高电池单体20的密封性能。
图6为本申请一些实施例的电池单体20的俯视图；图7为图6的A-A向剖视图；图8为图7中的Ⅰ部放大图。
如图6和图7所示，本申请一些实施例的电池单体2，包括：电极组件22、端盖21、壳体23和密封件24。电极组件22容纳于壳体23内，壳体23具有第一限位部232，端盖21盖合于壳体23的开口231，在端盖23的厚度方向上(与电池单体长度方向X相同)，端盖21位于第一限位部232面向电极组件22的一侧，第一限位部232限制端盖21沿背离电极组件22的方向移动；密封件24用于密封端盖21和第一限位部232，以使端盖21和第一限位部232密封连接。
请参照图7和图8，端盖21包括盖本体211和凸出部212，凸出部212沿端盖21的厚度方向从盖本体211背离电极组件22的表面凸出，密封件24的至少部分夹持于凸出部212和第一限位部232之间。
在端盖21的背离电极组件22的表面设置凸出部212，端盖21盖合至壳体23的开口231后，使密封件24的至少部分夹持于凸出部212和第一限位部232之间，使第一限位部232和凸出部212夹紧密封件24，保证电池单体20的密封性能。
请参照图8，在一些实施例中，第一限位部232为壳体23局部向端盖21翻折并在端盖21背离电极组件22的表面一侧形成的翻边结构。
端盖21盖合至壳体23的开口231后，将壳体第一限位部232和密封件24共同向端盖21方向翻折形成翻边结构，使密封件24翻折部分包覆凸出部212，第一限位部232的翻边结构包覆密封件24，从而能够使第一限位部232和凸出部212夹紧并共同挤压密封件24，提高电池单体20的密封性能。
请继续参照图7和图8，在一些实施例中，第一限位部232包括相连的第一部分2321和第二部分2322，第一部分2321包覆凸出部212，第二部分 2322从第一部分2321靠近端盖21中心的端部2323朝向端盖21中心延伸第一预定距离L。端盖21的中心位置位于壳体23的中轴线Y上(见图7中点划线)，对于圆柱型电池单体而言，朝向端盖21中心的方向即壳体23的径向R(见图7中端盖21上方的箭头方向)。
第一限位部232向端盖21方向翻折后，包覆凸出部212的部分形成第一部分2321，从第一部分2321的端部2323朝向中轴线Y延伸的部分形成第二部分2322。第一部分2321完全包覆凸出部212，第二部分向端盖21中心延伸第一预定距离L，使电池单体20的密封性能更好，并且第二部分2322的宽度为第一预定距离L，可以在第二部分2322上连接汇流部件30，从而实现多个电池单体20的电连接。
通常汇流部件30可以采用焊接的方式焊接在第二部分2322上。第一限位部23向端盖21方向翻折后，第一限位部232的端部朝向端盖中心方向(中轴线Y方向)延伸，第一限位部232朝向端盖中心方向的端部的直径逐渐减小，但由于壳体23在向端盖21方向翻折之前，为一个完整的圆柱型筒状结构，其直径为一个固定值，因此，翻折后，第一限位部232会向端盖中心方向皱缩，从而产生褶皱，使第一限位部232不能完全抚平，导致在第一限位部232与汇流部件30进行焊接连接时，容易产生虚焊，影响电池2整体的连接强度，有产生短路的风险。
此外，由于壳体23通常采用金属材料制成，由于金属材料的特性，其向端盖中心方向翻折时，第一限位部232的翻边结构的宽度通常较小，在将第一限位部232与汇流部件30进行焊接连接时，由于较窄的翻边结构，使焊接区域的面积相对较小，而使电池单体20的过流面积较小。
图9为本申请一些实施例的壳体23的剖视图。
如图9所示，为了避免第一限位部232翻折后形成褶皱以及焊接区域面积较小的问题，在一些实施例中，在第一限位部232展开的状态下，第二部分2322包括环绕壳体23的中轴线Y且间隔设置的多个缺口234，每个缺口234均延伸至第二部分2322远离第一部分2321的端部。
间隔设置的多个缺口234使第二部分2322分割为多个环绕壳体23的中轴线Y且间隔设置的翻折部2324，当第一限位部232向端盖21方向翻折后，第一部分2321包覆凸出部212后，多个间隔设置的翻折部2324分别向端盖中心方向延伸，从而避免第二部分2322在翻折抚平过程中形成褶皱。并且，由于设置多个缺口234，使多个翻折部2324向端盖中心方向延伸的第一预定距离L可以设置的较宽，在将汇流部件30与第二部分2322进行焊接连接时，焊接区域面积增大，提高过流面积。
图10为图9中的Ⅱ部放大图。
如图10所示，在一些实施例中，缺口234包括相交于一个顶点P且成预定角度的两条切边2341，在第一限位部232向端盖21翻折后，从顶点P引出的两条切边2341对接以使第二部分2322形成完整的环形结构，如图6所示。
缺口234的两条切边2341在第一限位部232向端盖21翻折后对接重合，使第二部分2322覆盖端盖21上表面形成完整的环形结构，该环形结构由于不存在褶皱，从而在汇流部件30与第二部分2322焊接时，不会产生虚焊，保证焊接强度。并且，也不会由于缺口234的存在而导致第二部分2322翻折至端盖21上表面后形成空缺，不会影响焊接区域面积。
在一些具体实施例中，缺口234的数量N可以设置大于等于4个，缺口234的两条切边2341之间的夹角α，根据缺口234的数量的不同而不同，对于圆柱型电池单体20，夹角α与数量N的关系为：N×α＝360°。具体的夹角α与数量N可见下表1。
表1 夹角与数量对照表
数量N 4 5 6 8 9 … N
夹角α° 90° 72° 60° 45° 40° … (360/N)°
夹角α与数量N的设置，可以根据电池单体20的外形尺寸进行设置，当壳体23的半径R2(见图9)较大时，可以将数量N设置的较多，当壳体23的半径R2较小时，可以将数量N设置的相对较少，从而可以根据电池单 体20的外形尺寸灵活设置。
请继续参照图8至图10，在一些实施例中，壳体23还设有第二限位部233，在端盖21的厚度方向(电池单体长度方向X)上，盖本体211位于第二限位部233背离电极组件22的一侧，第二限位部233用于限制盖本体211相对壳体23沿面向电极组件22的方向移动。第二限位部233可以起到防止端盖21挤压极耳221，避免伤害电极组件22的作用。
具体地，第二限位部233形成于壳体23的壳本体235及第一限位部232之间。示例性的，第二限位部233可以是凸出于壳本体235的内周面的环形结构。
可选地，壳本体235的外周面上与第二限位部233相对应的位置形成有辊槽2331。在实际成型过程中，可通过辊压的方式在壳本体235的外周面上辊压出辊槽2331，并在壳本体235的内周面上形成内凸的第二限位部233。
在一些实施例中，端盖21与壳体23的所带电性相反，例如，端盖21带负电荷，则壳体23带正电荷，或者端盖21带正电荷，则壳体23带负电荷，为了避免端盖21与壳体23接触而发生短路，需要对端盖21与壳体23进行绝缘。在一些实施例中，密封件24隔离端盖21和壳体23，以使端盖21与壳体23绝缘连接。密封件24对端盖21和壳体23进行密封的同时，又实现对端盖21和壳体23的绝缘，以降低短路风险。
请继续参照图8，密封件24为与壳体23内表面相配合的筒状结构，端盖21安装在密封件24内侧，密封件24将壳体23和端盖21完全隔离开，从而实现绝缘的目的。在一些实施例中，密封件24一侧端部位于第二限位部233中部，另一侧端部从第二部分2322靠近端盖中心的端部伸出第二预定距离ΔL。具体地，第二预定距离ΔL≥5mm。
密封件24的材质可以为聚乙烯、聚丙烯、聚四氟乙烯等高分子塑料，在一个具体实施例中，密封件24可以采用厚度为0.8mm的聚乙烯材料。
由于第二限位部233在壳本体235的内周面上向壳体23内凸出，端盖21朝向电极组件22的表面的边缘由第二限位部233沿电池单体长度方向X 远离电极组件22的端部支撑，密封件24一侧端部位于第二限位部233中部，可以将端盖21朝向电极组件22的表面完全与壳体23隔离开，并且密封件24一直延伸至第二部分2322靠近端盖中心的端部伸出第二预定距离ΔL，则能够使端盖21背离电极组件22的表面与壳体23完全隔离开，避免端盖21和壳体23的接触，实现充分绝缘。
图11为本申请一些实施例的端盖21的截面图；图12为图11中Ⅲ部放大图。
如图11和12所示，在一些实施例中，壳体23为圆柱型壳体，端盖21为与开口231相适配的圆形端盖，凸出部212环绕端盖21周边呈环状分布，凸出部212的截面为半圆形，半圆形截面的凸出部212使第一限位部232和密封件24向端盖21方向翻折时，翻折的第一部分2321能够更贴合凸出部212的形状，从而更紧密地将密封部24加紧，提高电池单体20的密封性能。
具体地，在一些实施例中，凸出部212的截面半径为R1，在第一限位部232展开的状态下，第一部分2321的长度L1满足：π×R1<L1<10mm。第一部分2321的长度L1大于π×R1，即L1大于半圆凸出部212的上半周长，能够保证第一部分2321完全包覆凸出部212的上表面，提高密封性；并且，L1小于10mm，使第一部分2321翻折后不易产生褶皱，形成光滑的表面。在一个具体实施例中，R1等于2mm，从而减小对电池单体20与其他部件例如汇流部件30连接时的影响。
请继续参照图8和图9，在一些实施例中，壳体的半径为R2，在第一限位部232展开的状态下，第二部分2322的长度L2满足：2mm<L2<R2-6mm。第二部分2322的长度L2大于2mm，能够使第二部分2322与汇流部件30焊接连接时有足够的焊接区域，保证电池单体20的过流面积；L2小于壳体23的半径R2减去6mm，使第二部分2322朝向端盖21的中心的端部与端盖21的中心保持大于6mm的距离，从而使第二部分2322不会与端盖21中心的其他部件例如电极端子等产生干涉。
图13为本申请一些实施例的制备电池单体20的方法流程图。
如图13所示，本申请实施例提供一种制备电池单体20的方法，包括以下步骤：
步骤S1，提供电极组件22；
步骤S2，提供壳体23，壳体23具有开口231和第一限位部232；
步骤S3，提供端盖21；
步骤S4，提供密封件24；
步骤S5，将电极组件22容纳于壳体23内；
步骤S6，将端盖21盖合于开口231；
其中，在端盖21的厚度方向上，端盖21位于第一限位部232面向电极组件22的一侧，第一限位部232用于限制端盖21沿背离电极组件22的方向移动；利用密封件24密封端盖21和第一限位部232，以使端盖21和第一限位部232密封连接；端盖21包括盖本体211和凸出部212，凸出部212沿端盖21的厚度方向从盖本体211背离电极组件22的表面凸出，密封件24的至少部分夹持于凸出部212和第一限位部232之间。
在上述方法中，并不限制步骤S1、步骤S2、步骤S3和步骤S4先后顺序，比如，可以先执行步骤S4，再执行步骤S3，再执行步骤S2，再执行步骤S1。
通过本申请实施例的制备电池单体的方法，在端盖21的背离电极组件22的表面设置凸出部212，端盖21盖合至壳体23的开口后，使密封件24的至少部分夹持于凸出部212和第一限位部232之间，使第一限位部232和凸出部212夹紧密封件24，保证电池单体20的密封性能。
图14为本申请一些实施例提供的制备电池单体20的设备500的示意性框图。
如图14所示，本申请实施例还提供一种制备电池单体的设备500，包括：第一提供装置501、第二提供装置502、第三提供装置503、第四提供装置504、组装装置505。
第一提供装置501，用于提供电极组件22；第二提供装置502，用于提 供壳体23，壳体23具有开口231和第一限位部232；第三提供装置503，提供端盖21；第四提供装置504，提供密封件24；组装装置505，用于将电极组件22容纳于壳体23内；并用于将端盖21盖合于开口231；其中，在端盖21的厚度方向上，端盖21位于第一限位部232面向电极组件22的一侧，第一限位部232用于限制端盖21沿背离电极组件22的方向移动；利用密封件24密封端盖21和第一限位部232，以使端盖21和第一限位部232密封连接；端盖21包括盖本体211和凸出部212，凸出部212沿端盖21的厚度方向从盖本体211背离电极组件22的表面凸出，密封件24的至少部分夹持于凸出部212和第一限位部232之间。
通过本申请实施例的制备电池单体的设备500，在端盖21的背离电极组件22的表面设置凸出部212，端盖21盖合至壳体23的开口后，使密封件24的至少部分夹持于凸出部212和第一限位部232之间，使第一限位部232和凸出部212夹紧密封件24，保证电池单体20的密封性能。
以上所述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 (14)

  1. 一种电池单体，其特征在于，包括：
    电极组件；
    壳体，用于容纳所述电极组件，所述壳体具有开口和第一限位部；
    端盖，用于盖合所述开口，在所述端盖的厚度方向上，所述端盖位于所述第一限位部面向所述电极组件的一侧，所述第一限位部用于限制所述端盖沿背离所述电极组件的方向移动；
    密封件，用于密封所述端盖和所述第一限位部，以使所述端盖和所述第一限位部密封连接；
    其中，所述端盖包括盖本体和凸出部，所述凸出部沿所述端盖的厚度方向从所述盖本体背离所述电极组件的表面凸出，所述密封件的至少部分夹持于所述凸出部和所述第一限位部之间。
  2. 根据权利要求1所述的电池单体，其特征在于，所述第一限位部为所述壳体局部向所述端盖翻折并在所述端盖背离所述电极组件的表面一侧形成的翻边结构。
  3. 根据权利要求2所述的电池单体，其特征在于，所述第一限位部包括相连的第一部分和第二部分，所述第一部分包覆所述凸出部，所述第二部分从所述第一部分靠近所述端盖中心的端部朝向所述端盖中心延伸第一预定距离。
  4. 根据权利要求3所述的电池单体，其特征在于，在所述第一限位部展开的状态下，所述第二部分包括环绕所述壳体的中轴线且间隔设置的多个缺口，每个所述缺口均延伸至所述第二部分远离所述第一部分的端部。
  5. 根据权利要求4所述的电池单体，其特征在于，所述缺口包括相交于一个顶点且成预定角度的两条切边，在所述第一限位部向所述端盖翻折后，从所述顶点引出的所述两条切边对接以使所述第二部分形成完整的环形结构。
  6. 根据权利要求1-5任一项所述的电池单体，其特征在于，所述壳体还设有第二限位部，在所述端盖的厚度方向上，所述盖本体位于所述第二限位部背离所述电极组件的一侧，所述第二限位部用于限制所述盖本体相对所述壳体沿面向所述电极组件的方向移动。
  7. 根据权利要求1-6任一项所述的电池单体，其特征在于，所述密封件隔离所述端盖和所述壳体，以使所述端盖与所述壳体绝缘连接。
  8. 根据权利要求1-7任一项所述的电池单体，其特征在于，所述壳体为圆柱型壳体，所述凸出部环绕所述端盖周边呈环状分布，所述凸出部的截面为半圆形。
  9. 根据权利要求8所述的电池单体，其特征在于，所述凸出部的截面半径为R 1，在所述第一限位部展开的状态下，所述第一部分的长度L 1满足：π×R 1<L 1<10mm。
  10. 根据权利要求8或9所述的电池单体，其特征在于，所述壳体的半径为R 2，在所述第一限位部展开的状态下，所述第二部分的长度L 2满足：
    2mm<L 2<R 2-6mm。
  11. 一种电池，其特征在于，包括多个如权利要求1-10任一项所述的电池单体。
  12. 一种用电装置，其特征在于，包括如权利要求11所述的电池，所述电池用于提供电能。
  13. 一种制备电池单体的方法，其特征在于，包括以下步骤：
    提供电极组件；
    提供壳体，所述壳体具有开口和第一限位部；
    提供端盖；
    提供密封件；
    将电极组件容纳于所述壳体内；
    将所述端盖盖合于所述开口；
    其中，在所述端盖的厚度方向上，所述端盖位于所述第一限位部面向所述电极组件的一侧，所述第一限位部用于限制所述端盖沿背离所述电极组件的方向移动；
    利用密封件密封所述端盖和所述第一限位部，以使所述端盖和所述第一限位部密封连接；
    所述端盖包括盖本体和凸出部，所述凸出部沿所述端盖的厚度方向从所述盖本体背离所述电极组件的表面凸出，所述密封件的至少部分夹持于所述凸出部和所述第一限位部之间。
  14. 一种制备电池单体的设备，其特征在于，包括：
    第一提供装置，用于提供电极组件；
    第二提供装置，用于提供壳体，所述壳体具有开口和第一限位部；
    第三提供装置，提供端盖；
    第四提供装置，提供密封件；
    组装装置，用于将电极组件容纳于所述壳体内；并用于将所述端盖盖合于所述开口；
    其中，在所述端盖的厚度方向上，所述端盖位于所述第一限位部面向所述电极组件的一侧，所述第一限位部用于限制所述端盖沿背离所述电极组件的方向移动；
    利用密封件密封所述端盖和所述第一限位部，以使所述端盖和所述第一限位部密封连接；
    所述端盖包括盖本体和凸出部，所述凸出部沿所述端盖的厚度方向从所述盖本体背离所述电极组件的表面凸出，所述密封件的至少部分夹持于所述凸出部和所述第一限位部之间。
PCT/CN2021/118623 2021-09-15 2021-09-15 电池单体、电池、用电装置、制备电池单体的方法及设备 WO2023039771A1 (zh)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN202180082070.4A CN116569397A (zh) 2021-09-15 2021-09-15 电池单体、电池、用电装置、制备电池单体的方法及设备
PCT/CN2021/118623 WO2023039771A1 (zh) 2021-09-15 2021-09-15 电池单体、电池、用电装置、制备电池单体的方法及设备
JP2023505886A JP2023544949A (ja) 2021-09-15 2021-09-15 電池セル、電池、電力消費装置、電池セルの製造方法及び設備
KR1020237003362A KR20230042289A (ko) 2021-09-15 2021-09-15 배터리 셀, 배터리, 전기 장치, 배터리 셀의 제조 방법 및 기기
EP21951112.8A EP4178014A1 (en) 2021-09-15 2021-09-15 Battery cell, battery, electric apparatus, and method and device for preparing battery cell
US18/328,752 US20230307750A1 (en) 2021-09-15 2023-06-04 Battery cell, battery, electrical apparatus, and method and device for preparing battery cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/118623 WO2023039771A1 (zh) 2021-09-15 2021-09-15 电池单体、电池、用电装置、制备电池单体的方法及设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/328,752 Continuation US20230307750A1 (en) 2021-09-15 2023-06-04 Battery cell, battery, electrical apparatus, and method and device for preparing battery cell

Publications (1)

Publication Number Publication Date
WO2023039771A1 true WO2023039771A1 (zh) 2023-03-23

Family

ID=85602242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/118623 WO2023039771A1 (zh) 2021-09-15 2021-09-15 电池单体、电池、用电装置、制备电池单体的方法及设备

Country Status (6)

Country Link
US (1) US20230307750A1 (zh)
EP (1) EP4178014A1 (zh)
JP (1) JP2023544949A (zh)
KR (1) KR20230042289A (zh)
CN (1) CN116569397A (zh)
WO (1) WO2023039771A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117543143A (zh) * 2024-01-09 2024-02-09 深圳海辰储能科技有限公司 端盖组件、储能装置及用电设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117564147B (zh) * 2024-01-15 2024-03-29 珠海市美尔达自动化设备有限公司 一种圆柱电池自动滚槽机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000082457A (ja) * 1998-09-04 2000-03-21 Toyo Kohan Co Ltd 電気電子機器・部品用安全装置、それを用いた密閉型電池の安全装置及びそれを用いた密閉型電池
CN103151475A (zh) * 2013-03-28 2013-06-12 凯迈嘉华（洛阳）新能源有限公司 电极绝缘密封结构
CN103199204A (zh) * 2013-03-28 2013-07-10 凯迈嘉华（洛阳）新能源有限公司 电极绝缘密封结构装配工艺
CN206353550U (zh) * 2017-05-05 2017-07-25 济南圣泉集团股份有限公司 壳体绝缘密封结构
CN108807734A (zh) * 2017-05-05 2018-11-13 济南圣泉集团股份有限公司 储能器件及其组装工艺

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000082457A (ja) * 1998-09-04 2000-03-21 Toyo Kohan Co Ltd 電気電子機器・部品用安全装置、それを用いた密閉型電池の安全装置及びそれを用いた密閉型電池
CN103151475A (zh) * 2013-03-28 2013-06-12 凯迈嘉华（洛阳）新能源有限公司 电极绝缘密封结构
CN103199204A (zh) * 2013-03-28 2013-07-10 凯迈嘉华（洛阳）新能源有限公司 电极绝缘密封结构装配工艺
CN206353550U (zh) * 2017-05-05 2017-07-25 济南圣泉集团股份有限公司 壳体绝缘密封结构
CN108807734A (zh) * 2017-05-05 2018-11-13 济南圣泉集团股份有限公司 储能器件及其组装工艺

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117543143A (zh) * 2024-01-09 2024-02-09 深圳海辰储能科技有限公司 端盖组件、储能装置及用电设备
CN117543143B (zh) * 2024-01-09 2024-04-09 深圳海辰储能科技有限公司 端盖组件、储能装置及用电设备

Also Published As

Publication number Publication date
US20230307750A1 (en) 2023-09-28
CN116569397A (zh) 2023-08-08
KR20230042289A (ko) 2023-03-28
JP2023544949A (ja) 2023-10-26
EP4178014A1 (en) 2023-05-10

Similar Documents

Publication Publication Date Title
WO2023137950A1 (zh) 卷绕式电极组件、电池单体、电池及用电设备
WO2023050969A1 (zh) 一种电池单体、电池及用电装置
WO2023039771A1 (zh) 电池单体、电池、用电装置、制备电池单体的方法及设备
US20230012207A1 (en) Battery cell, battery, power consumption device, and battery cell manufacturing method and device
EP4254644A1 (en) Battery cell, battery, and electrical apparatus
US20230395931A1 (en) End cover assembly, battery cell, battery, and electric apparatus
CN217306722U (zh) 端盖组件、电池单体、电池及用电装置
US20240154218A1 (en) Battery cell, battery, and electrical apparatus
US20240145889A1 (en) Insulation patch, battery cell, battery, and device
CN215497007U (zh) 电池单体、电池及用电设备
US20240055705A1 (en) Battery cell, battery, power consuming apparatus, and method and apparatus for manufacturing battery cell
CN116806393A (zh) 电池单体及其制造方法和制造设备、电池和用电装置
US20230395949A1 (en) Battery unit, battery, electric device, and manufacturing method and device of battery unit
US20230155262A1 (en) Housing, battery cell, battery and electric apparatus
CN216085250U (zh) 电池单体、电池及用电装置
CN217134505U (zh) 一种电池单体、电池和用电装置
WO2023065193A1 (zh) 电池单体、电池、用电装置、电池单体的制造方法及设备
WO2023000184A1 (zh) 电池单体、电池、用电设备及电池单体的制造方法和设备
CN116529941A (zh) 电池单体及其制造方法和制造系统、电池以及用电装置
WO2023065188A1 (zh) 电池单体、电池、用电设备、电池单体的制造方法和设备
CN115917829B (zh) 电池单体、电池、用电设备及电池单体的制造设备
CN217788578U (zh) 端盖组件、电池单体、电池及用电装置
WO2024020766A1 (zh) 电池单体、电池、用电装置及电池单体的制造方法
WO2023220880A1 (zh) 端盖组件、电池单体、电池及用电装置
CN221102270U (zh) 电池单体、电池及用电装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2023505886

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 20237003362

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2021951112

Country of ref document: EP

Effective date: 20230201

WWE Wipo information: entry into national phase

Ref document number: 202180082070.4

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE