WO2024017160A1 - 电池单体、电池及用电装置 - Google Patents

电池单体、电池及用电装置 Download PDF

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Publication number
WO2024017160A1
WO2024017160A1 PCT/CN2023/107447 CN2023107447W WO2024017160A1 WO 2024017160 A1 WO2024017160 A1 WO 2024017160A1 CN 2023107447 W CN2023107447 W CN 2023107447W WO 2024017160 A1 WO2024017160 A1 WO 2024017160A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
wall
battery
electrode assembly
present application
Prior art date
Application number
PCT/CN2023/107447
Other languages
English (en)
French (fr)
Inventor
林蹬华
陈龙
陈新祥
郑于炼
金海族
王鹏
黄守君
Original Assignee
宁德时代新能源科技股份有限公司
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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
Publication of WO2024017160A1 publication Critical patent/WO2024017160A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • 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 belongs to the field of battery technology, and in particular relates to a battery cell, a battery and an electrical device.
  • Battery cells are systems that can be combined with each other to harness new renewable energy.
  • Embodiments of the present application provide a battery cell, a battery and an electrical device, which can facilitate the assembly and molding of battery cells and improve the production efficiency of battery cells.
  • a first aspect of the embodiment of the present application provides a battery cell, including a casing, an end cover and an electrode terminal.
  • the housing has an opening, the end cover is used to cover the opening, the electrode terminal is arranged on the housing, and the end cover is the wall with the largest area of the battery cell.
  • the end cover as the wall with the largest area on the battery cell, the area of the opening can be increased, making it easier for the structure in the battery cell to enter the case.
  • the electrode terminals are arranged on the case, which improves the efficiency. The assembly speed during assembly thus speeds up the production efficiency of battery cells.
  • the battery cell further includes an electrode assembly, and the electrode assembly is disposed in the housing; the electrode assembly includes a main body and tabs extending from the main body, so The arrangement direction of the pole tabs and the main body part is perpendicular to the thickness direction of the end cover.
  • the housing includes a first wall and a second wall that intersect, and the area of the second wall is larger than the area of the first wall and smaller than the area of the end cover, so
  • the electrode terminal is arranged on the first wall; the end surface of the main body extending out of the tab faces the second wall.
  • the infiltration area of the electrode assembly can be increased as much as possible and the infiltration effect can be improved.
  • the battery cell further includes a connecting component for connecting the electrode terminal and the tab.
  • the tabs can be easily connected to the electrode terminals by providing the connecting components.
  • connection component includes a first connection part and a second connection part.
  • the first connection part is used to connect the electrode terminal, and the second connection part is used to connect all the electrode terminals. Tell the story.
  • the portions on the connecting component that connect the electrode terminals and the tabs can be relatively independent, thereby facilitating the installation of a structure on the connecting component for connecting the electrode terminals and the tabs.
  • the connecting component is L-shaped.
  • the connecting part can be conveniently arranged at the corner where the first wall and the second wall meet, making full use of the remaining space in the casing and improving the energy density of the battery cell.
  • the housing has two openings arranged oppositely along the thickness direction of the end cover, and the battery cell includes two end covers, two of the End caps are provided correspondingly at the two openings.
  • the size of the main body of the electrode assembly is H1
  • the size of the housing is H2, satisfying H1/H2 ⁇ 0.8 .
  • the main body can occupy the internal space of the battery cell as much as possible, reduce the space occupied by other components of the battery cell (such as connecting parts), and improve the space utilization of the battery cell. rate and energy density.
  • the electrode assembly is a rolled electrode assembly.
  • the size of the electrode assembly is L, satisfying 300mm ⁇ L ⁇ 800mm, and the first direction is vertical in the thickness direction of the end cap and the thickness direction of the second wall.
  • the size of the electrode assembly is D, satisfying 10 mm ⁇ D ⁇ 80 mm.
  • a second aspect of the embodiment of the present application provides a battery, including the above-mentioned battery cell.
  • a third aspect of the embodiment of the present application provides an electrical device, including the above-mentioned battery cell, for providing electrical energy.
  • the end cover as the wall with the largest area on the battery cell, the area of the opening can be increased, which facilitates installation inside the battery cell.
  • the structure enters the casing, which increases the assembly speed during assembly, thereby speeding up the production efficiency of battery cells.
  • Figure 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application.
  • Figure 2 is a schematic structural diagram of a battery provided by some embodiments of the present application.
  • Figure 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application.
  • Figure 4 is a schematic structural diagram of a battery cell provided by other embodiments of the present application.
  • Figure 5 is a schematic side structural view of a battery cell provided by some embodiments of the present application.
  • FIG. 6 is a schematic cross-sectional view along A-A in FIG. 5 .
  • FIG. 7 is an enlarged schematic view of the first wall in FIG. 6 .
  • FIG. 8 is an enlarged schematic diagram of the electrode terminal in FIG. 6 .
  • Figure 9 is a schematic structural diagram of an electrode assembly provided in some embodiments of the application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • the battery cell includes a shell used to form a receiving space, and the shell is usually provided with an opening for placing the internal structure of the battery cell into the receiving space.
  • the internal structure of the battery cells is relatively compact, and the assembly process of the internal structures into the casing is difficult, which seriously affects the production efficiency of the battery cells.
  • the inventor found that by adjusting the position of the opening on the casing, the passage area of the opening can be expanded, making it easier for the internal structure of the battery cell to enter the casing and increasing the assembly speed. , speeding up the production efficiency of battery cells.
  • the inventor of the present application designed a battery cell, a battery and a power device after in-depth research.
  • Embodiments of the present application provide an electrical device that uses a battery as a power source.
  • the electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • the battery may be an energy storage device.
  • Energy storage devices include energy storage containers, energy storage cabinets, etc.
  • an electric device 1000 according to an embodiment of the present application is used as an example.
  • FIG. 1 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • the battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 . Battery 100 may be used to power the vehicle 1000 , for example, the battery 100 may be used as an operating power source for the vehicle 1000 .
  • the vehicle 1000 may also include a controller 200 and a motor 300 .
  • the controller 200 is used to control the battery 100 to provide power to the motor 300 , for example, for starting, navigating and driving the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • the battery mentioned 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.
  • FIG. 2 is a schematic structural diagram of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a box 110.
  • the box 110 may include a connected first box part 111 and a second box part 112. Multiple battery cells are connected in parallel or in series or in a mixed combination.
  • the rear part is placed in the space formed by connecting the first box part 111 and the second box part 112.
  • the shapes of the first box part 111 and the second box part 112 can be based on the shapes formed by combining a plurality of battery cells.
  • the battery cells may be flat, rectangular, or other shapes, which are not limited in the embodiments of the present application.
  • the packaging methods of the battery cells include but are not limited to cylindrical battery cells, rectangular battery cells, soft-pack battery cells, etc., and the embodiments of the present application are not specifically limited to this.
  • the battery 100 may also include other structures, such as bus components, for realizing electrical connections between multiple battery cells, which will not be described in detail here.
  • FIG. 3 is a schematic structural diagram of a battery cell provided by some embodiments of the present application
  • FIG. 4 is a schematic structural diagram of a battery cell provided by other embodiments of the present application.
  • some optional embodiments of the present application provide a battery cell 10 , including a case 1 , an end cover 2 and an electrode terminal 3 .
  • the case 1 has an opening 11, and the end cover 2 is used to cover the opening 11.
  • the electrode terminal 3 is arranged on the case 1.
  • the end cover 2 is the wall with the largest area of the battery cell.
  • the housing 1 is a component used to form a receiving space for the battery cells, and the formed receiving space can be used to accommodate the internal structure of the battery cells.
  • the shape of the housing 1 may be determined according to the specific shape of the electrode assembly 4 .
  • the housing 1 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiments of the present application.
  • the electrode terminal 3 is used for electrical connection to the outside world, and the power supply can be drawn or introduced from the battery cell 10 .
  • one end of the electrode terminal 3 is disposed inside the casing 1 to be connected to the internal structure of the battery cell 10 , and the other end is disposed outside the casing 1 .
  • the end cap 2 is used to cover the opening 11 of the housing 1 and form a sealed connection to form a sealed space for accommodating the internal structure of the battery cell.
  • the area of the opening 11 can be increased, making it easier for the structure inside the battery cell 10 to enter the housing 1, thereby increasing the assembly speed during assembly, thereby making the assembly easier.
  • the production efficiency of the battery cells 10 is accelerated.
  • the housing 1 may be a hollow structure with an opening 11 on one side, or a hollow structure with openings 11 on opposite sides.
  • the opening 11 of the housing 1 is provided on one or two walls of the rectangular battery with the largest area, and the end cover 2 covers the opening 11 .
  • the aforementioned wall refers to a wall-shaped structure used to enclose a space, such as a square battery cell having six walls.
  • two end caps 2 can also be provided.
  • One end cap 2 is correspondingly covered with one opening 11 of the housing 1 and forms a sealed connection to form a structure for accommodating battery cells. 10. Sealed space of internal structure.
  • the area of the end cover 2 is larger than the area of the remaining surfaces of the battery cell.
  • the end cover 2 can completely cover the wall with the largest area on the rectangular battery, or partially cover the wall with the largest area on the rectangular battery.
  • the electrode terminal 3 may include a positive electrode terminal and a negative electrode terminal, which are respectively used to be electrically connected to the positive electrode tab and the negative electrode tab of the electrode assembly.
  • FIG. 5 is a schematic side structural view of a battery cell provided by some embodiments of the present application.
  • FIG. 6 is a schematic cross-sectional view along A-A in FIG. 5 .
  • FIG. 7 is an enlarged schematic view of the first wall 12 in FIG. 6 .
  • FIG. 8 is an enlarged schematic diagram of electrode terminal 3 in FIG. 6 .
  • the battery cell also includes an electrode assembly 4, which is disposed in the housing 1; the electrode assembly 4 includes a main body 41 and The pole tabs 42 extend from the main body part 41.
  • the arrangement direction of the pole tabs 42 and the main body part 41 (the y-axis direction in the figure) is perpendicular to the thickness direction of the end cap 2 (the x-axis direction in the figure).
  • the electrode assembly 4 refers to the assembly used for electrochemical reactions in the battery cell.
  • the electrode assembly 4 is mainly formed by winding or stacking positive electrode sheets and negative electrode sheets, and a separator is usually provided between the positive electrode sheets and the negative electrode sheets.
  • the portions of the positive electrode sheet and the negative electrode sheet that contain active material constitute the main body 41 of the electrode assembly 4
  • the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material constitute the tabs 42 respectively.
  • the positive active material and the negative active material react with the electrolyte in the battery cell, and the tab 42 is electrically connected to the electrode terminal 3 to form a current loop.
  • the end surface of the lead tabs 42 does not correspond to the largest surface of the battery cell (i.e., the end cover 2) and is significantly reduced. This eliminates the waste of space caused by the lead-out tab 42 and improves the energy density.
  • a rectangular battery As an example, it includes two large walls with the largest area, two middle walls with the second largest area, and two small walls with the smallest area.
  • the end surface 43 extending from the tab 42 can be the end surface facing the middle wall or the small wall. One of 43.
  • one or more electrode assemblies 4 may be provided.
  • the housing 1 includes an intersecting first wall 12 and a second wall 13, and the area of the second wall 13 is greater than that of the first wall 12 and is less than The area of the end cover 2 is such that the electrode terminal 3 is disposed on the first wall 12 ; the end surface 43 of the main body 41 extending out of the tab 42 faces the second wall 13 .
  • the end surface of the lead-out tab 42 and the end surface opposite the end surface can be made larger, which facilitates the liquid ( If electrolyte) enters the electrode assembly 4, the infiltration area of the electrode assembly 4 can be increased as much as possible and the infiltration effect can be improved.
  • first wall 12 and the second wall 13 can be a middle wall or a middle wall.
  • One of the small walls, the other of the first wall 12 and the second wall 13 is the middle wall or the other of the small walls.
  • the battery cell further includes a connecting component 5 for connecting the electrode terminal 3 and the tab 42 .
  • the connecting member 5 By providing the connecting member 5 , the tab 42 can be easily connected to the electrode terminal 3 .
  • the connecting component 5 can be made of a connecting piece made of conductive material.
  • connection component 5 includes a first connection part 51 and a second connection part 52 .
  • the first connection part 51 is used to connect the electrode terminal 3
  • the second connection part 52 is used to connect the tab 42 .
  • first connecting part 51 and the second connecting part 52 may be integrally formed or provided separately.
  • first connection part 51 and the second connection part 52 may be connected through one of a welding structure, a conductive adhesive bonding structure, or a riveting structure.
  • Conductive connection through a welding structure means that the first connection part 51 and the second connection part 52 are connected by welding means such as laser welding.
  • the conductive connection of the bonding structure through conductive glue refers to the use of conductive glue to bond the first connection part 51 and the second connection part 52.
  • the conductive glue can be a conductive glue film.
  • the conductive glue can not only realize the first connection part 51 and the second connection part 52
  • the electrical connection between the connecting parts 52 can also realize the mechanical connection between the two.
  • the conductive connection through the riveting structure means that the first connection part 51 and the second connection part 52 are connected to each other through rivets.
  • the pole lug 42 can be disposed between the second connecting part 52 and the second wall 13 , so that the pole lug 42 can be bent and wrapped around the surface of the second connecting part 52 to improve the connection between the second connecting part 52 and the pole lug. 42 rooms contact area.
  • the connecting component 5 is L-shaped.
  • the connecting member 5 By arranging the connecting member 5 in an L shape, the connecting member 5 can be conveniently placed at the corner where the first wall 12 and the second wall 13 meet, making full use of the remaining space in the casing 1 and improving the energy density of the battery cells. .
  • the housing 1 has two opposite openings 11 along the thickness direction of the end cover 2 (x-axis direction in the figure), and the battery cell includes two openings 11. There are two end caps 2, and the two end caps 2 are correspondingly arranged at the two openings 11.
  • Figure 9 is a schematic structural diagram of the electrode assembly 4 provided in some embodiments of the application.
  • the size of the main body 41 of the electrode assembly 4 along the thickness direction of the second wall 13 (the x-axis direction in the figure) is H1
  • the size of shell 1 is H2, satisfying H1/H2 ⁇ 0.8.
  • the main body can be fully It may occupy the internal space of the battery cell, reduce the space occupied by other components of the battery cell (such as connecting parts), and improve the space utilization and energy density of the battery cell.
  • the size of the main body 41 of the electrode assembly 4 is H1
  • the size of the housing 1 is H2, so that H1/H2 ⁇ 0.9 is satisfied.
  • the size of the main body 41 of the electrode assembly 4 is H1
  • the size of the housing 1 is H2, so that H1/H2 is equal to 0.85, 0.9 or 0.95.
  • the electrode assembly is a rolled electrode assembly.
  • the size of the electrode assembly 4 is L satisfies 300mm ⁇ L ⁇ 800mm, and the first direction is perpendicular to the thickness direction of the end cover 2 (the x-axis direction in the figure) and the thickness direction of the second wall 13 (the y-axis direction in the figure).
  • the production efficiency of the wound electrode assembly 4 is high, and by constraining the size of the electrode assembly in the first direction, it can reduce the problem that L is too small, resulting in low energy density of the battery cell; it can also reduce the problem that L is too large, resulting in The processing difficulty of the electrode assembly increases, resulting in a reduction in the production efficiency of the electrode assembly.
  • the size of the electrode assembly 4 is L, satisfying 500mm ⁇ L ⁇ 550mm.
  • the size of the electrode assembly 4 is L, such that L is equal to 400mm, 500mm, 600mm or 700mm.
  • the size of the electrode assembly 4 along the thickness direction of the end cap 2 is D, which satisfies 10 mm. ⁇ D ⁇ 80mm.
  • the size of one electrode assembly 4 is D, and 10mm ⁇ D ⁇ 80mm.
  • they should be arranged along the thickness direction of the end cap 2 (the x-axis direction in the figure), and D is the total size of the multiple electrode assemblies 4 along the thickness direction of the end cap 2 (the x-axis direction in the figure).
  • the size of the electrode assembly 4 is D, satisfying 40mm ⁇ D ⁇ 50mm.
  • the size of the electrode assembly 4 is D, which satisfies that D is equal to 20mm, 30mm, 40mm, 50mm, 60mm and 70mm.
  • a second aspect of the embodiment of the present application provides a battery, including the above-mentioned battery cell body.
  • a third aspect of the embodiment of the present application provides an electrical device, including the above-mentioned battery cell, for providing electrical energy.
  • a battery cell including a case 1 , an end cover 2 and an electrode terminal 3 .
  • the case 1 has an opening 11, and the end cover 2 is used to cover the opening 11.
  • the electrode terminal 3 is arranged on the case 1.
  • the end cover 2 is the wall with the largest area of the battery cell.
  • the battery cell also includes an electrode assembly 4, which is disposed in the housing 1; the electrode assembly 4 includes a main body 41 and tabs 42 extending from the main body 41, and the tabs 42 are arranged perpendicular to the main body 41. The thickness direction of the end cap 2.
  • the housing 1 includes an intersecting first wall 12 and a second wall 13 , and the electrode terminal 3 is disposed on the first wall 12 ; the end surface 43 of the main body 41 extending out of the tab 42 faces the second wall 13 .
  • the battery cell also includes a connecting component 5 for connecting the electrode terminal 3 and the tab 42.
  • the connecting component 5 is L-shaped.
  • the housing 1 has two openings 11 arranged oppositely.
  • the battery cell includes two end covers 2, and the two end covers 2 are correspondingly arranged at the two openings 11.
  • the size of the main body 41 of the electrode assembly 4 is H1
  • the size of the housing 1 is H2, satisfying H1/H2 ⁇ 0.9.
  • the size of the electrode assembly 4 is L, which satisfies 490 mm ⁇ L ⁇ 510 mm.
  • the first direction is perpendicular to the thickness direction of the end cap 2 and the thickness direction of the second wall 13 .
  • the size of the electrode assembly 4 is D, which satisfies 45mm ⁇ D ⁇ 55mm.
  • the end cover 2 As the wall with the largest area on the battery cell, the area of the opening 11 can be increased, which facilitates the convenience of the battery cell.
  • the structure inside the body enters the casing 1, which increases the assembly speed during assembly, thereby speeding up the production efficiency of the battery cells.

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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)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本申请实施方式提供了一种电池单体、电池及用电装置，所述电池单体包括壳体、端盖及电极端子。所述壳体具有开口，所述端盖用于盖合所述开口，所述电极端子设置于所述壳体上，所述端盖为所述电池单体的面积最大的壁。通过将端盖设置为电池单体上面积最大的壁，能够使开口的面积增大，便于电池单体内的结构进入壳体内，提高了组装时的组装速度，进而使电池单体的生产效率加快。

Description

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2022年07月19日提交的名称为“电池单体、电池及用电装置”的中国专利申请202221856857.X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
本申请属于电池技术领域，尤其涉及一种电池单体、电池及用电装置。
背景技术
随着自然资源的消耗及环境的破坏日益加重，各领域中对可以储存能量并有效地利用储存能量的装置兴趣日益增长。电池单体是可以彼此结合的利用新的可再生能量的***。
在电池设备技术领域中，电池单体的生产效率较低。
发明内容
本申请实施方式提供了一种电池单体、电池及用电装置，能够便于电池单体组装成型，提高电池单体的生产效率。
本申请实施方式的第一方面，提供了一种电池单体，包括壳体、端盖及电极端子。所述壳体具有开口，所述端盖用于盖合所述开口，所述电极端子设置于所述壳体上，所述端盖为所述电池单体的面积最大的壁。
采用上述结构，通过将端盖设置为电池单体上面积最大的壁，能够使开口的面积增大，便于电池单体内的结构进入壳体内，同时，将电极端子设置在壳体上，提高了组装时的组装速度，进而使电池单体的生产效率加快。
在本申请的一些可选实施方式中，所述电池单体还包括电极组件，所述电极组件设置于所述壳体内；所述电极组件包括主体部以及从主体部延伸出的极耳，所述极耳与所述主体部的排列方向垂直于所述端盖的厚度方向。
采用上述结构，通过将极耳与主体部的排列方向与端盖的厚度方向垂直，减小极耳占用的空间，提高能量密度。
在本申请的一些可选实施方式中，所述壳体包括相交的第一壁和第二壁，所述第二壁的面积大于所述第一壁的面积小于所述端盖的面积，所述电极端子设置于所述第一壁；所述主体部延伸出所述极耳的端面面向所述第二壁。
采用上述结构，可以尽可能增大电极组件的浸润面积，提高浸润效果。
在本申请的一些可选实施方式中，所述电池单体还包括连接部件，用于连接所述电极端子与所述极耳。
采用上述结构，通过设置连接部件，能够便于极耳连接电极端子。
在本申请的一些可选实施方式中，所述连接部件包括第一连接部及第二连接部，所述第一连接部用于连接所述电极端子，所述第二连接部用于连接所述极耳。
采用上述结构，通过设置第一连接部及第二连接部，能够使连接部件上连接电极端子及极耳的部位相对独立，便于连接部件上设置用于连接电极端子及极耳的结构。
在本申请的一些可选实施方式中，所述连接部件为L形。
采用上述结构，通过将连接部件设置为L形，能够便于连接部件设置于第一壁及第二壁交汇的拐角处，充分的利用了壳体内的剩余空间，提高电池单体的能量密度。
在本申请的一些可选实施方式中，沿所述端盖的厚度方向上，所述壳体具有相对设置的两个开口，所述电池单体包括两个所述端盖，两个所述端盖对应设置在两个所述开口处。
采用上述结构，通过设置两个开口，能够使壳体上在组装时的操 作空间进一步加大，提高组装效率。
在本申请的一些可选实施方式中，沿所述第二壁的厚度方向上，所述电极组件的主体部的尺寸为H1，所述壳体的尺寸为H2，满足，H1/H2≥0.8。
采用上述结构，通过约束H1/H2的比值，能够使主体部尽可能占用该电池单体的内部空间，减少电池单体其他部件(如连接部件)占用的空间，提高该电池单体的空间利用率和能量密度。
在本申请的一些可选实施方式中，所述电极组件为卷绕式电极组件，沿第一方向，所述电极组件的尺寸为L，满足，300mm≤L≤800mm，所述第一方向垂直于所述端盖的厚度方向和所述第二壁的厚度方向。
采用上述结构，通过约束沿第一方向上电极组件的尺寸，能够减少L过小，导致电池单体的能量密度较低的问题；也能够减少L过大，导致电极组件的加工难度增加，造成电极组件生产效率降低的问题。
在本申请的一些可选实施方式中，沿所述端盖的厚度方向上，所述电极组件的尺寸为D，满足，10mm≤D≤80mm。
采用上述结构，通过约束沿厚度方向上电极组件的尺寸，能够减少D过小，导致电池单体的能量密度较低的问题；也能够减少D过大，导致电极组件的加工难度增加，造成电极组件生产效率降低的问题。
本申请实施方式的第二方面，提供了一种电池，包括上述电池单体。
本申请实施方式的第三方面，提供了一种用电装置，包括上述电池单体，用于提供电能。
与相关技术相比，本申请实施方式的电池单体、电池及用电装置中，通过将端盖设置为电池单体上面积最大的壁，能够使开口的面积增大，便于电池单体内的结构进入壳体内，提高了组装时的组装速度，进而使电池单体的生产效率加快。
附图说明
为了更清楚地说明本申请实施方式的技术方案，下面将对本申请 实施方式中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施方式，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示意图。
图3为本申请一些实施例提供的电池单体的结构示意图。
图4为本申请另一些实施例提供的电池单体的结构示意图。
图5为本申请一些实施例提供的电池单体的侧视结构示意图。
图6为图5中沿A-A的剖视示意图。
图7为图6中第一壁处的放大示意图。
图8为图6中电极端子处的放大示意图。
图9为申请一些实施例提供的电极组件的结构示意图。
附图中：
1000、车辆；100、电池；200、控制器；300、马达；110、箱体；
111、第一箱体部；112、第二箱体部；10、电池单体；
1、壳体；11、开口；12、第一壁；13、第二壁；2、端盖；3、
电极端子；4、电极组件；41、主体部；42、极耳；43、端面；5、连接部件；51、第一连接部；52、第二连接部。
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。
下面将结合附图对本申请技术方案的实施方式进行详细的描述。以下实施方式仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申 请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施方式的目的，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。
在本申请实施方式的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。
在本文中提及“实施方式”意味着，结合实施方式描述的特定特征、结构或特性可以包含在本申请的至少一个实施方式中。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方式，也不是与其它实施方式互斥的独立的或备选的实施方式。本领域技术人员显式地和隐式地理解的是，本文所描述的实施方式可以与其它实施方式相结合。
在本申请实施方式的描述中，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，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施方式的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施方式的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施方式和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施方式的限制。
在本申请实施方式的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也 可以是电连接；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或两个元件的相互作用关系。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实施方式中的具体含义。
电池技术的发展中，不仅需要考虑多方面的设计因素，还需要同时考虑电池生产过程，如生产效率、生产安全性等，其中，电池生产中的生产效率已经成为制约电池进一步发展的重要阻碍之一。
发明人注意到，电池单体包括用于形成容纳空间的壳体，壳体上通常设置有开口用于向容纳空间内放置电池单体的内部结构。但是，为了提升电池单体的能量密度，电池单体的内部结构较为紧凑，内部结构进入壳体的组装过程难度较大，严重影响电池单体的生产效率。
为了缓解电池单体生产效率较低的技术问题，发明人研究发现，可以通过调整开口在壳体上的设置位置，扩大开口的通过面积，便于电池单体的内部结构进入壳体内，提高组装速度，使电池单体的生产效率加快。
基于以上考虑，本申请发明人经过深入研究，设计了一种电池单体、电池及用电装置。
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。
在一些实施例中，电池可以为储能装置。储能装置包括储能集装箱、储能电柜等。
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。
如图1所示，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。
本申请的实施例中，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。
如图2所示，图2为本申请一些实施例提供的电池100的结构示意图。在本申请一些实施方式中，电池100包括箱体110，箱体110可以包括相连接的第一箱体部111和第二箱体部112，多个电池单体相互并联或串联或混联组合后置于第一箱体部111和第二箱体部112连接后形成的空间内，第一箱体部111和第二箱体部112的形状可以根据多个电池单体组合而成的形状确定。电池单体可呈扁平体、长方形或其它形状等，本申请实施例对此不作限定。电池单体的封装方式包括但不限于柱形电池单体、方体方形电池单体和软包电池单体等，本申请实施例对此也不作具体限定。此外，电池100还可以包括其他结构，例如，汇流部件，用于实现多个电池单体之间的电连接，在此不再一一赘述。
图3为本申请一些实施例提供的电池单体的结构示意图，图4为本申请另一些实施例提供的电池单体的结构示意图。如图3及图4所示，本申请的一些可选实施方式，提供了一种电池单体10，包括壳体1、端盖2及电极端子3。壳体1具有开口11，端盖2用于盖合开口11，电极端子3设置于壳体1上，端盖2为电池单体的面积最大的壁。
壳体1是用于形成电池单体的容纳空间的组件，所形成的容纳空间可以用于容纳电池单体的内部结构。示例性地，壳体1的形状可根据电极组件4的具体形状来确定。壳体1的材质可以是多种，比如，铜、铁、铝、不锈钢、铝合金、塑胶等，本申请实施例对此不作特殊限制。
电极端子3用于向外界电连接，供电能从电池单体10内引出或引入。示例性地，电极端子3的一端设置于壳体1内与电池单体10的内部结构相连接，另一端设置于壳体1外。
端盖2用于盖合壳体1的开口11并形成密封连接，以形成用于容纳电池单体内部结构的密封空间。
通过将端盖2设置为电池单体10上面积最大的壁，能够使开口11的面积增大，便于电池单体10内的结构进入壳体1内，提高了组装时的组装速度，进而使电池单体10的生产效率加快。
参照图3及图4，可选地，壳体1可为一侧开口11的空心结构，或者相对的两侧开口11的空心结构。示例性地，以长方形电池为例，壳体1的开口11设置于长方形电池上面积最大的一个壁或者两个壁上，端盖2覆盖于开口11上。示例性地，前述壁指的是用于围合形成空间的壁形结构，如方形电池单体具有六个壁。示例性地，开口11设置两个时，端盖2也可设置有两个，一个端盖2对应盖合于壳体1的一个开口11处并形成密封连接，以形成用于容纳电池单体10内部结构的密封空间。
参照图3及图4，可选地，端盖2的面积大于电池单体上剩余各面的面积。示例性地，以长方形电池为例，端盖2可完全覆盖长方形电池上面积最大的壁，也可部分覆盖长方形电池上面积最大的壁。
可选地，电极端子3可以包括正极电极端子和负极电极端子，正极电极端子和负极电极端子分别用于与电极组件的正极极耳和负极极耳电连接。
图5为本申请一些实施例提供的电池单体的侧视结构示意图。图6为图5中沿A-A的剖视示意图。图7为图6中第一壁12处的放大示意图。图8为图6中电极端子3处的放大示意图。如图3、图5至图8所示，在本申请的一些可选实施方式中，电池单体还包括电极组件4，电极组件4设置于壳体1内；电极组件4包括主体部41以及从主体部41延伸出的极耳42，极耳42与主体部41的排列方向(图中y轴方向)垂直于端盖2的厚度方向(图中x轴方向)。
电极组件4指的是电池单体中用于发生电化学反应的组件。示例 性地，电极组件4主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件4的主体部41，正极片和负极片不具有活性物质的部分各自构成极耳42。在电池单体的充放电过程中，正极活性物质和负极活性物质与电池单体内的电解液发生反应，极耳42通过与电极端子3电连接以形成电流回路。
通过将极耳42与主体部41的排列方向与端盖2的厚度方向垂直，使引出极耳42的端面，不与电池单体上最大面(即端盖2)相对应，显著的减小了引出极耳42造成的空间浪费，提高能量密度。
示例性地，以长方形电池为例，包括面积最大的两大壁，面积其次的两中壁，面积最小的两小壁，延伸出极耳42的端面43可为面向中壁或小壁的端面43中的一者。
可选地，电极组件4可以设置一个或多个。
如图6至图8所示，在本申请的一些可选实施方式中，壳体1包括相交的第一壁12和第二壁13，第二壁13的面积大于第一壁12的面积小于端盖2的面积，电极端子3设置于第一壁12；主体部41延伸出极耳42的端面43面向第二壁13。
通过将电极端子3设置于第一壁12上，第二壁13的面积大于第一壁12的面积，能够使引出极耳42的端面以及与该端面相对的端面的面积较大，便于液体(如电解液)进入电极组件4内，可以尽可能增大电极组件4的浸润面积，提高浸润效果。
示例性地，以长方形电池为例，包括面积最大的两大壁，面积其次的两中壁，面积最小的两小壁，第一壁12及第二壁13中的一者可为中壁或者小壁中的一者，第一壁12及第二壁13中的另一者为中壁或者小壁中的另一者。
如图6至图8所示，在本申请的一些可选实施方式中，电池单体还包括连接部件5用于连接电极端子3与极耳42。通过设置连接部件5，能够便于极耳42连接电极端子3。
可选地，连接部件5可采用导电材质的连接片。
在本申请的一些可选实施方式中，连接部件5包括第一连接部51及第二连接部52，第一连接部51用于连接电极端子3，第二连接部52用于连接极耳42。通过设置第一连接部51及第二连接部52，能够使连接部件5上连接电极端子3及极耳42的部位相对独立，便于连接部件5上设置用于连接电极端子3及极耳42的结构。
可选地，第一连接部51与第二连接部52可一体成型或分体设置。示例性地第一连接部51及第二连接部52间可通过焊接结构、导电胶粘接结构或铆接结构中的一者相连接。通过焊接结构导电连接指的是第一连接部51和第二连接部52通过激光焊接等焊接手段将两者连接。通过导电胶粘接结构导电连接指的是利用导电胶将第一连接部51和第二连接部52粘接，导电胶可以是导电胶膜，导电胶不仅能够实现第一连接部51和第二连接部52之间的电连接，还能够实现两者之间的机械连接。通过铆接结构导电连接指的是第一连接部51和第二连接部52通过铆钉相互连接。
可选地，极耳42可设置于第二连接部52及第二壁13之间，能够使极耳42弯折后，包裹于第二连接部52表面，提高第二连接部52与极耳42间的接触面积。
如图6至图8所示，在本申请的一些可选实施方式中，连接部件5为L形。
通过将连接部件5设置为L形，能够便于连接部件5设置于第一壁12及第二壁13交汇的拐角处，充分的利用了壳体1内的剩余空间，提高电池单体的能量密度。
如图4所示，在本申请的一些可选实施方式中，沿端盖2的厚度方向(图中x轴方向)上，壳体1具有相对设置的两个开口11，电池单体包括两个端盖2，两个端盖2对应设置在两个开口11处。通过设置两个开口11，能够使壳体1上在组装时的操作空间进一步加大，提高组装效率。
图9为申请一些实施例提供的电极组件4的结构示意图。如图3、图6至图9所示，在本申请的一些可选实施方式中，沿第二壁13的厚度方向(图中x轴方向)上，电极组件4的主体部41的尺寸为H1，壳体1的尺寸为H2，满足，H1/H2≥0.8。通过约束H1/H2的比值，能够使主体部尽 可能占用该电池单体的内部空间，减少电池单体其他部件(如连接部件)占用的空间，提高该电池单体的空间利用率和能量密度。
可选地，电极组件4的主体部41的尺寸为H1，壳体1的尺寸为H2，满足，H1/H2≥0.9。
可选地，电极组件4的主体部41的尺寸为H1，壳体1的尺寸为H2，满足，H1/H2等于0.85、0.9或0.95。
如图3、图6至图9所示，在本申请的一些可选实施方式中，电极组件为卷绕式电极组件，沿第一方向(图中z轴方向)，电极组件4的尺寸为L，满足，300mm≤L≤800mm，第一方向垂直于端盖2的厚度方向(图中x轴方向)和第二壁13的厚度方向(图中y轴方向)。卷绕式电极组件4的生产效率较高，且通过约束第一方向上电极组件的尺寸，能够减少L过小，导致电池单体的能量密度较低的问题；也能够减少L过大，导致电极组件的加工难度增加，造成电极组件生产效率降低的问题。
可选地，沿第一方向，电极组件4的尺寸为L，满足，500mm≤L≤550mm。
可选地，沿第一方向，电极组件4的尺寸为L，满足，L等于400mm、500mm、600mm或700mm。
如图3、图6至图9所示，在本申请的一些可选实施方式中，沿端盖2的厚度方向(图中x轴方向)上，电极组件4的尺寸为D，满足，10mm≤D≤80mm。当电极组件4为一个时，一个电极组件4的尺寸为D，10mm≤D≤80mm。电极组件4有多个时，多个沿端盖2的厚度方向(图中x轴方向)排列，D为多个电极组件4沿端盖2的厚度方向(图中x轴方向)上总尺寸。通过约束沿厚度方向上电极组件的尺寸，能够减少D过小，导致电池单体的能量密度较低的问题；也能够减少D过大，导致电极组件的加工难度增加，造成电极组件生产效率降低的问题。可选地，沿端盖2的厚度方向上，电极组件4的尺寸为D，满足，40mm≤D≤50mm。
可选地，沿端盖2的厚度方向上，电极组件4的尺寸为D，满足，D等于20mm、30mm、40mm、50mm、60mm及70mm。
本申请实施方式的第二方面，提供了一种电池，包括上述电池单 体。
本申请实施方式的第三方面，提供了一种用电装置，包括上述电池单体，用于提供电能。
在本申请的一些可选实施方式中，提供了一种电池单体，包括壳体1、端盖2及电极端子3。壳体1具有开口11，端盖2用于盖合开口11，电极端子3设置于壳体1上，端盖2为电池单体的面积最大的壁。电池单体还包括电极组件4，电极组件4设置于壳体1内；电极组件4包括主体部41以及从主体部41延伸出的极耳42，极耳42与主体部41的排列方向垂直于端盖2的厚度方向。壳体1包括相交的第一壁12和第二壁13，电极端子3设置于第一壁12；主体部41延伸出极耳42的端面43面向第二壁13。电池单体还包括连接部件5，用于连接电极端子3与极耳42，连接部件5为L形。沿端盖2的厚度方向上，壳体1具有相对设置的两个开口11，电池单体包括两个端盖2，两个端盖2对应设置在两个开口11处。沿第二壁13的厚度方向上，电极组件4的主体部41的尺寸为H1，壳体1的尺寸为H2，满足，H1/H2≥0.9。沿第一方向，电极组件4的尺寸为L，满足，490mm≤L≤510mm，第一方向垂直于端盖2的厚度方向和第二壁13的厚度方向。沿端盖2的厚度方向上，电极组件4的尺寸为D，满足，45mm≤D≤55mm。
与相关技术相比，本申请实施方式的电池单体、电池及用电装置中，通过将端盖2设置为电池单体上面积最大的壁，能够使开口11的面积增大，便于电池单体内的结构进入壳体1内，提高了组装时的组装速度，进而使电池单体的生产效率加快。
最后应说明的是：以上各实施方式仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施方式对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施方式所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施方式技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施方式中所提到的各项技术特征均可以 任意方式组合起来。本申请并不局限于文中公开的特定实施方式，而是包括落入权利要求的范围内的所有技术方案。

Claims (12)

  1. 一种电池单体，包括：
    壳体，具有开口；
    端盖，用于盖合所述开口；
    电极端子，设置于所述壳体上；
    其中，所述端盖为所述电池单体的面积最大的壁。
  2. 根据权利要求1所述的电池单体，其中，
    所述电池单体还包括电极组件，所述电极组件设置于所述壳体内；
    所述电极组件包括主体部以及从主体部延伸出的极耳，所述极耳与所述主体部的排列方向垂直于所述端盖的厚度方向。
  3. 根据权利要求2所述的电池单体，其中，
    所述壳体包括相交的第一壁和第二壁，所述第二壁的面积大于所述第一壁的面积小于所述端盖的面积，所述电极端子设置于所述第一壁；所述主体部延伸出所述极耳的端面面向所述第二壁。
  4. 根据权利要求3所述的电池单体，其中，
    所述电池单体还包括连接部件，用于连接所述电极端子与所述极耳。
  5. 根据权利要求4所述的电池单体，其中，
    所述连接部件包括第一连接部及第二连接部，所述第一连接部用于连接所述电极端子，所述第二连接部用于连接所述极耳。
  6. 根据权利要求5所述的电池单体，其中，
    所述连接部件为L形。
  7. 根据权利要求3至6任一项所述的电池单体，其中，
    沿所述端盖的厚度方向上，所述壳体具有相对设置的两个开口，所述电池单体包括两个所述端盖，两个所述端盖对应设置在两个所述开口处。
  8. 根据权利要求3至7任一项所述的电池单体，其中，
    沿所述第二壁的厚度方向上，所述电极组件的主体部的尺寸为H1，所述壳体的尺寸为H2，满足，H1/H2≥0.8。
  9. 根据权利要求3至7任一项所述的电池单体，其中，
    所述电极组件为卷绕式电极组件，沿第一方向，所述电极组件的尺寸为L，满足，300mm≤L≤800mm，所述第一方向垂直于所述端盖的厚度方向和所述第二壁的厚度方向。
  10. 根据权利要求2至7任一项所述的电池单体，其中，
    沿所述端盖的厚度方向上，所述电极组件的尺寸为D，满足，10mm≤D≤80mm。
  11. 一种用电池，包括如权利要求1至10任一项所述的电池单体。
  12. 一种用电装置，包括如权利要求1至10任一项所述的电池单体，用于提供电能。
PCT/CN2023/107447 2022-07-19 2023-07-14 电池单体、电池及用电装置 WO2024017160A1 (zh)

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