WO2021197077A1 - 电池和具有所述电池的用电装置 - Google Patents

电池和具有所述电池的用电装置 Download PDF

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Publication number
WO2021197077A1
WO2021197077A1 PCT/CN2021/081374 CN2021081374W WO2021197077A1 WO 2021197077 A1 WO2021197077 A1 WO 2021197077A1 CN 2021081374 W CN2021081374 W CN 2021081374W WO 2021197077 A1 WO2021197077 A1 WO 2021197077A1
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WO
WIPO (PCT)
Prior art keywords
housing
liquid injection
tab
injection port
pole
Prior art date
Application number
PCT/CN2021/081374
Other languages
English (en)
French (fr)
Inventor
余自强
林礼清
黄志峰
王辉
Original Assignee
宁德新能源科技有限公司
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 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Priority to EP21779902.2A priority Critical patent/EP4024602A4/en
Publication of WO2021197077A1 publication Critical patent/WO2021197077A1/zh
Priority to US17/708,737 priority patent/US20220238973A1/en

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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of the cells
    • 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
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports

Definitions

  • This application relates to a battery and an electric device having the battery.
  • a battery usually includes a battery cell, a casing for accommodating the battery core, and a top cover installed on the casing.
  • the top cover is usually provided with a liquid injection port, and the electrolyte is injected into the shell through the liquid injection port.
  • the cell includes a pole piece and a pole piece connected to the pole piece, and the pole piece is used to conduct electrons.
  • the present application provides a battery including a laminated battery cell, a first housing for accommodating the laminated battery cell, and a second housing mounted on the first housing, the laminated battery cell including Electrode assembly and first tab.
  • the electrode assembly includes a first side surface, the first tab is connected to the first side surface, and a liquid injection space is defined between the first housing, the first tab and the first side surface.
  • the second casing is provided with a liquid injection port, and the projection of the liquid injection space on the second casing covers at least a part of the liquid injection port.
  • the central axis of the liquid injection port is located in the liquid injection space.
  • the first tab includes a first surface close to the laminated cell, a second surface away from the laminated cell, and connected to the first surface and the first surface.
  • the second side between the two sides.
  • the first side surface includes a flat surface area and an arc surface area connecting the flat surface area, and the flat surface area, the second side surface, and the first housing define the liquid injection space.
  • the distance between the junction of the plane area and the arc surface area and the second side surface is L, then the central axis of the liquid injection port and the second side surface The distance between them is less than or equal to 0.5L.
  • the distance between the central axis of the liquid injection port and the second side surface is 0.4 mm-1 mm.
  • a seal is provided in the liquid injection port.
  • the liquid injection port, the sealing member, and the second housing are all circular, and define the distance between the center of the liquid injection port and the center of the second housing.
  • the distance is M
  • the radius of the second housing is R 1
  • the radius of the seal is R 2
  • the second housing is further provided with a through hole, and a pole that is electrically insulated from the second housing is provided in the through hole.
  • the electrode assembly includes a first pole piece, an isolation film, and a second pole piece that are stacked, the first pole lug is connected to the first pole piece, and the second pole piece is connected to There is a second tab, the second tab is electrically connected to the pole, and the first tab is electrically connected to the first housing or the second housing.
  • the first housing is provided with a through hole
  • the through hole is provided with a pole that is electrically insulated from the first housing
  • the first tab is electrically connected to the ⁇ .
  • the application also provides an electrical device, which includes the battery as described above.
  • the projection of the liquid injection space on the second housing covers at least part of the liquid injection port. Therefore, when liquid is injected, the electrolyte can directly flow into the liquid injection port avoiding the laminated cells.
  • the liquid injection space therefore, the present application can improve the liquid injection efficiency, thereby improving the efficiency of electrolyte infiltration of the pole pieces.
  • FIG. 1 is an exploded schematic diagram of the structure of a battery according to an embodiment of the application.
  • Fig. 2 is a plan view of the battery shown in Fig. 1.
  • Fig. 3 is a cross-sectional view of the battery shown in Fig. 1.
  • Fig. 4 is a top view of the battery shown in Fig. 1 with a second casing removed.
  • FIG. 5 is an exploded schematic diagram of the structure of a battery according to another embodiment of the application.
  • Fig. 6 is a cross-sectional view of the battery shown in Fig. 5.
  • FIG. 7 is a cross-sectional view of a battery according to another embodiment of the application.
  • FIG. 8 is a schematic diagram of the structure of an electrical device according to an embodiment of the application.
  • the first pole piece 11a is the first pole piece 11a
  • the first adapter 120 The first adapter 120
  • the second adapter 130 The second adapter 130
  • an embodiment of the present application provides a battery 100, including a laminated cell 10, a first housing 20 for accommodating the laminated cell 10, and a first housing 20 installed on the first The second housing 30 of the housing 20.
  • the laminated cell 10 includes an electrode assembly 11 and a first tab 12.
  • the electrode assembly 11 includes a first side surface 111, and the first tab 12 is connected to the first side surface 111.
  • a liquid injection space 101 is defined between the first housing 20, the first tab 12 and the first side surface 111 (as shown in FIG. 4).
  • the second casing 30 is provided with a liquid injection port 31, and the projection of the liquid injection space 101 on the second casing 30 covers at least a part of the liquid injection port 31.
  • the projection of the liquid injection space 101 on the second housing 30 covers at least a part of the liquid injection port 31. Therefore, when liquid is injected, the electrolyte can be avoided by the liquid injection port 31 to avoid the laminated electricity.
  • the core 20 directly flows into the liquid injection space 101. Therefore, the present application can improve the efficiency of liquid injection, thereby improving the efficiency of infiltration of the electrode pieces by the electrolyte.
  • the central axis A of the liquid injection port 31 is located in the liquid injection space 101.
  • the liquid injection port 31 may have a geometrically symmetrical shape, such as a circle, an ellipse, a square, a hexagon, and the like.
  • the liquid injection port 31 may also have other asymmetric shapes, which is not limited in this application.
  • the liquid injection port 31 can be formed by stamping or mechanical cutting.
  • the first tab 12 includes a first surface 121 close to the laminated cell 10, a second surface 122 away from the laminated cell 10, and connected to The second side surface 123 between the first surface 121 and the second surface 122.
  • the first side surface 111 includes a flat area 1110 and a curved surface area 1111 connecting the flat area 1110, and the flat area 1110, the second side surface 123 and the first housing 20 define the liquid injection space 101.
  • the cross section of the liquid injection space 101 is roughly triangular. Therefore, the area of the liquid injection space 101 close to the first tab 12 is larger than the area of the liquid injection space 101 far away from the first tab 12.
  • the distance between the junction of the plane area 1110 and the arc surface area 1111 and the second side surface 123 is L, then the central axis A of the liquid injection port 31 and the The distance between the second side surfaces 123 is less than or equal to 0.5L. In this way, the central axis A of the liquid injection port 31 is closer to the first tab 12, which enables the electrolyte to flow into the liquid injection space 101 during liquid injection and has a larger cross-sectional area, and further ensures that the electrolyte is not received during liquid injection. Obstacles of laminated cells 10.
  • the distance between the central axis A of the liquid injection port 31 and the second side surface 123 is 0.4 mm-1 mm.
  • a sealing member 32 is provided in the liquid injection port 31. After the liquid injection is completed, the liquid injection port 31 is sealed by the sealing member 32 to prevent the injected electrolyte from leaking or external impurities from entering the battery 100.
  • the sealing member 32 is made of an elastic material, and the sealing member 32 is fixed in the liquid injection port 31 by an elastic deformation force generated after receiving a force.
  • the sealing member may also be a sealing nail made of a weldable material (such as stainless steel or aluminum alloy). After the sealing nail is inserted into the liquid injection port 31, the sealing nail is made by laser welding. The sealing nail is fixed with the second housing 30. In this way, the sealing reliability of the liquid injection port 31 can be improved.
  • the liquid injection port 31, the sealing member 32, and the second housing 30 are all circular, defining the center of the liquid injection port 31 to the first
  • M The distance between the centers of the two shells 30
  • R 1 the radius of the second shell 30
  • R 2 the radius of the sealing member 32
  • the second housing 30 is further provided with a through hole 33, and the through hole 33 is provided with a pole that is electrically insulated from the second housing 30 34. As shown in FIG. 2, the pole 34 may be located in the center of the second housing 30.
  • the electrode assembly 11 includes a first pole piece 11a, a second pole piece 11b, and an isolation located between the first pole piece 11a and the second pole piece 11b.
  • a membrane (not marked in the figure), the first tab 12 is connected to the first pole piece 11a.
  • a second tab 13 is connected to the second pole piece 11b, the second tab 13 is electrically connected to the pole 34, and the first tab 12 is electrically connected to the first housing 20 or The second housing 30.
  • the first pole piece 11a includes a first current collector and a first active material layer disposed on the surface of the first current collector, and the first tab 12 can be electrically connected to the first electrode by welding.
  • the current collector is electrically connected to the pole 34 through the first adapter 120.
  • the second pole piece 11b includes a second current collector and a second active material layer disposed on the surface of the second current collector.
  • the second tab 13 can be electrically connected to the second current collector by welding, And it is electrically connected to the first housing 20 or the second housing 30 through the second adapter 130.
  • the material of the first housing 20 and the second housing 30 may be metal.
  • the material of the first housing 20 and the second housing 30 may be steel alloy, aluminum alloy, iron alloy, copper alloy, nickel alloy, or the like.
  • the pole 34 By electrically connecting the first tab 12 to the pole 34, the pole 34 can exhibit the same electrical polarity as the first pole piece 11a.
  • the second tab 13 By electrically connecting the second tab 13 to the first housing 20 or the second housing 30, when the first housing 20 and the second housing 30 are welded and fixed, the The first housing 20 and the second housing 30 may exhibit the same electrical polarity as the second pole piece 11b as a whole; when the first housing 20 and the second housing 30 are fixed by insulating pads The first housing 20 or the second housing 30 may exhibit the same electrical polarity as the second pole piece 11b.
  • the battery 100 in this embodiment is a button battery, and the materials of the first housing 20 and the second housing 30 are both stainless steel.
  • the first housing 20 and the second housing 30 may be formed into desired shapes by using processes such as laser cutting, machine processing, and the like.
  • the first housing 20 may also be formed by stamping and forming to form a pit, so as to accommodate the laminated cell 10.
  • some other embodiments of the present application further provide a battery 200.
  • the difference from the battery 100 described above is that the pole 34 electrically connected to the first tab 12 is located in the first housing 20.
  • the pole 34 is electrically insulated from the first housing 20.
  • the pole 34 may be located on the side wall of the first housing 20.
  • the second tab 13 is electrically connected to the pole 34.
  • the first tab 12 is electrically connected to the first housing 20 or the second housing 30.
  • yet another embodiment of the present application further provides a battery 300.
  • the difference from the battery 100 described above is that neither the first housing 20 nor the second housing 30 is provided with a pole.
  • the first housing 20 and the second housing 30 are fixed by a sealing ring (not labeled), that is, the first housing 20 and the second housing 30 are electrically isolated by the sealing ring.
  • the first tab 12 is electrically connected to the second housing 30, and the second tab 13 is electrically connected to the first housing 20.
  • this application also provides an electric device 1, which includes the above-mentioned battery 100 (or batteries 200, 300).
  • the electrical device 1 may be a consumer electronic product (such as a mobile communication device, a tablet computer, a notebook computer, etc.), an electric tool, an unmanned aerial vehicle, an energy storage device, a power device, and the like.
  • the electrical device 1 is an electric vehicle.

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

Abstract

一种电池，包括叠片电芯、用于容置所述叠片电芯的第一壳体和安装于所述第一壳体的第二壳体，所述叠片电芯包括电极组件和第一极耳。所述电极组件包括第一侧面，所述第一极耳连接所述第一侧面，所述第一壳体、第一极耳和所述第一侧面之间限定出注液空间。所述第二壳体设有注液口，所述注液空间在所述第二壳体上的投影覆盖至少部分所述注液口。本申请还提供一种具有上述电池的用电装置。本申请能够提高注液效率。

Description

电池和具有所述电池的用电装置 技术领域
本申请涉及电池和具有所述电池的用电装置。
背景技术
电池通常包括电芯、用于容置电芯的壳体和安装于壳体的顶盖。顶盖上通常设有注液口，电解液由注液口注入壳体。电芯包括极片和连接极片的极耳，极耳用于实现电子的传导。
然而，由于注液口位于电芯上方，注液过程中电解液会受到极片和极耳的阻碍，使得注液效率低，从而使电解液对极片的浸润效率也受到影响。
发明内容
为解决现有技术以上不足，有必要提供一种能够提高注液效率的电池，从而提高电解液对极片的浸润效率。
本申请提供一种电池，包括叠片电芯、用于容置所述叠片电芯的第一壳体和安装于所述第一壳体的第二壳体，所述叠片电芯包括电极组件和第一极耳。所述电极组件包括第一侧面，所述第一极耳连接所述第一侧面，所述第一壳体、第一极耳和所述第一侧面之间限定出注液空间。所述第二壳体设有注液口，所述注液空间在所述第二壳体上的投影覆盖至少部分所述注液口。
在本申请一些实施方式中，所述注液口的中心轴位于所述注液空间内。
在本申请一些实施方式中，所述第一极耳包括靠近所述叠片电芯的第一面、远离所述叠片电芯的第二面以及连接于所述第一面和所述第二面之间的第二侧面。所述第一侧面包括平面区域和连接所述平面区域的弧面区域，所述平面区域、所述第二侧面与所述第一壳体限定出所述注液空间。
在本申请一些实施方式中，定义所述平面区域和所述弧面区域的连接处与所述第二侧面之间的距离为L，则所述注液口的中心轴与所述第二侧面之间的距离小于或等于0.5L。
在本申请一些实施方式中，所述注液口的中心轴与所述第二侧面之间的距离为0.4mm-1mm。
在本申请一些实施方式中，所述注液口中设有密封件。
在本申请一些实施方式中，所述注液口、所述密封件和所述第二壳体均为圆形，定义所述注液口的中心到所述第二壳体的中心之间的距离为M，所述第二壳体的半径为R 1，所述密封件的半径为R 2，则M、R 1和R 2满足关系：M＝R 1-R 2-0.2mm。
在本申请一些实施方式中，所述第二壳体还设有通孔，所述通孔中设有与所述第二壳体电绝缘的极柱。
在本申请一些实施方式中，所述电极组件包括堆叠设置的第一极片、隔离膜和第二极片，所述第一极耳连接所述第一极片，所述第二极片上连接有第二极耳，所述第二极耳电连接于所述极柱，所述第一极耳电连接于所述第一壳体或所述第二壳体。
在本申请一些实施方式中，所述第一壳体上设有通孔，所述通孔中设有与所述第一壳体电绝缘的极柱，所述第一极耳电连接于所述极柱。
本申请还提供一种用电装置，所述用电装置包括如上所述的电池。
本申请设置所述注液空间在所述第二壳体上的投影覆盖至少部分所述注液口，因此在注液时，电解液可由所述注液口避开叠片电芯而直接流入所述注液空间，因此本申请能够提高注液效率，从而提高电解液对极片的浸润效率。
附图说明
图1为本申请一实施方式的电池的结构分解示意图。
图2为图1所示的电池的俯视图。
图3为图1所示的电池的剖视图。
图4为图1所示的电池去掉第二壳体后的俯视图。
图5为本申请另一实施方式的电池的结构分解示意图。
图6为图5所示的电池的剖视图。
图7为本申请又一实施方式的电池的剖视图。
图8为本申请一实施方式的用电装置的结构示意图。
主要元件符号说明
用电装置            1
叠片电芯            10
电极组件            11
第一极片            11a
第二极片            11b
第一极耳            12
第二极耳            13
第一壳体            20
第二壳体            30
注液口              31
密封件              32
通孔                33
极柱                34
电池                100、200、300
注液空间            101
第一侧面            111
第一转接件          120
第一面              121
第二面              122
第二侧面            123
第二转接件          130
平面区域            1110
弧面区域            1111
中心轴              A
距离                L、M
半径                R 1、R 2
如下具体实施方式将结合上述附图进一步说明本申请。
具体实施方式
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、完整地描述，显然，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。
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。本文中在本申请的说明书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。
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施方式及实施方式中的特征可以相互组合。
请参阅图1至图4，本申请一实施方式提供一种电池100，包括叠片电芯10、用于容置所述叠片电芯10的第一壳体20和安装于所述第一壳体20的第二壳体30。所述叠片电芯10包括电极组件11和第一极耳12。
所述电极组件11包括第一侧面111，所述第一极耳12连接所述第一侧面111。所述第壳体20、第一极耳12和所述第一侧面111之间限定出注液空间101(如图4所示)。所述第二壳体30设有注液口31，所述注液空间101在所述第二壳体30上的投影覆盖至少部分所述注液口31。
本申请设置所述注液空间101在所述第二壳体30上的投影覆盖至少部分所述注液口31，因此在注液时，电解液可由所述注液口31避开叠片电芯20而直接流入所述注液空间101。因此，本申请能够提高注液效率，从而提高电解液对极片的浸润效率。
如图4所示，在一实施方式中，所述注液口31的中心轴A位于所述注液空间101内。所述注液口31可以为几何对称形状，例如圆形、椭圆形、正方形、六边形等。通过设置所述注液口31的中心轴A位于所述注液空间101内，使得所述注液空间101在所述第二壳体30上的投影与所述注液口31之间具有更大的重合面积，如此，可以进一步保证在注液时电解液不受到叠片电芯10的阻碍。
可以理解，在其它实施方式中，所述注液口31还可以为其它不对称的形状，本申请不做限定。所述注液口31可以采用冲压或机械切割等方式形成。
如图4所示，在一实施方式中，所述第一极耳12包括靠近所述叠片电芯10的第一面121、远离所述叠片电芯10的第二面122以及连接于所述第一面121和所述第二面122之 间的第二侧面123。所述第一侧面111包括平面区域1110和连接所述平面区域1110的弧面区域1111，所述平面区域1110、所述第二侧面123与所述第一壳体20限定出所述注液空间101。如图4所示，所述注液空间101的横截面大致为三角形。因此，所述注液空间101在靠近所述第一极耳12的区域比所述注液空间101在远离所述第一极耳12的区域更大。
在一实施方式中，定义所述平面区域1110和所述弧面区域1111的连接处与所述第二侧面123之间的距离为L，则所述注液口31的中心轴A与所述第二侧面123之间的距离小于或等于0.5L。如此，所述注液口31的中心轴A更靠近第一极耳12，能够使得注液时电解液流入注液空间101具有更大横截面的区域，进一步保证在注液时电解液不受到叠片电芯10的阻碍。
进一步地，所述注液口31的中心轴A与所述第二侧面123之间的距离为0.4mm-1mm。
如图1所示，在一实施方式中，所述注液口31中设有密封件32。在注液完成后，通过所述密封件32密封所述注液口31，避免注入的电解液漏出或避免外界杂质进入电池100内部。其中，所述密封件32采用弹性材质制成，所述密封件32通过受力后产生的弹性变形力固定于所述注液口31中。在其它实施方式中，所述密封件还可以是采用可焊接材质(如不锈钢或铝合金)制得的密封钉，所述密封钉插入所述注液口31后，通过激光焊接方式使得所述密封钉与所述第二壳体30固定在一起。如此，可以提高注液口31的密封可靠性。
如图2所示，在一实施方式中，所述注液口31、所述密封件32和所述第二壳体30均为圆形，定义所述注液口31的中心到所述第二壳体30的中心之间的距离为M，所述第二壳体30的半径为R 1，所述密封件32的半径为R 2，则M、R 1和R 2满足关系：M＝R 1-R 2-0.2mm(0.2mm是所述第一壳体20的壁厚，该关系式下，密封件32不会影响到所述第一壳体20和所述第二壳体30的焊接)。
如图1至图3所示，在一实施方式中，所述第二壳体30还设有通孔33，所述通孔33中设有与所述第二壳体30电绝缘的极柱34。如图2所示，所述极柱34可位于所述第二壳体30的中心。
进一步地，如图3所示，所述电极组件11包括堆叠设置的第一极片11a、第二极片 11b及位于所述第一极片11a和所述第二极片11b之间的隔离膜(图未标)，所述第一极耳12连接所述第一极片11a。所述第二极片11b上连接有第二极耳13，所述第二极耳13电连接于所述极柱34，所述第一极耳12电连接于所述第一壳体20或所述第二壳体30。
具体地，所述第一极片11a包括第一集流体和设置于所述第一集流体表面的第一活性材料层，所述第一极耳12可通过焊接方式电连接于所述第一集流体并通过第一转接件120电连接所述极柱34。所述第二极片11b包括第二集流体和设置于所述第二集流体表面的第二活性材料层，所述第二极耳13可通过焊接方式电连接于所述第二集流体，并通过第二转接件130电连接所述第一壳体20或所述第二壳体30。
更具体地，所述第一壳体20和所述第二壳体30的材质可以为金属。如，所述第一壳体20和所述第二壳体30的材质可以为钢合金、铝合金、铁合金、铜合金、镍合金等。
通过将所述第一极耳12电连接于所述极柱34，所述极柱34可呈现与所述第一极片11a相同的电极性。通过将所述第二极耳13电连接于所述第一壳体20或所述第二壳体30，当所述第一壳体20和所述第二壳体30焊接固定时，所述第一壳体20和所述第二壳体30整体可呈现与所述第二极片11b相同的电极性；当所述第一壳体20和所述第二壳体30通过绝缘垫固定时，所述第一壳体20或所述第二壳体30可呈现与所述第二极片11b相同的电极性。
如图1和图3所示，本实施方式中的所述电池100为扣式电池，所述第一壳体20和所述第二壳体30的材质均为不锈钢。制备时，所述第一壳体20和所述第二壳体30可以采用激光切割、机床加工等工艺形成所需的形状。所述第一壳体20还可以采用冲压成型形成冲坑，从而容置所述叠片电芯10。
请参阅图5和图6，本申请另一些实施方式还提供一种电池200。与上述电池100不同之处在于，与所述第一极耳12电连接的极柱34位于所述第一壳体20。所述极柱34与所述第一壳体20电性绝缘。
更具体地，所述极柱34可以位于第一壳体20的侧壁。所述第二极耳13电连接所述极柱34。所述第一极耳12电连接于所述第一壳体20或所述第二壳体30。
请参阅图7，本申请又一实施方式还提供一种电池300。与上述电池100不同之处在于，所述第一壳体20和所述第二壳体30上均不设置极柱。第一壳体20和第二壳体30通过密封圈(图未标)固定，即，所述第一壳体20和所述第二壳体30通过所述密封圈电性 隔绝。所述第一极耳12电连接于第二壳体30，所述第二极耳13电连接于第一壳体20。
请参阅图8，本申请还提供一种用电装置1，所述用电装置1包括上述电池100(或电池200、300)。其中，所述用电装置1可以是消费性电子产品(如移动通信装置、平板电脑、笔记本电脑等)、电动工具、无人机、储能装置、动力装置等。参照图，在一实施方式中，所述用电装置1为电动汽车。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (11)

  1. 一种电池，包括叠片电芯、用于容置所述叠片电芯的第一壳体和安装于所述第一壳体的第二壳体，所述叠片电芯包括电极组件和第一极耳，其特征在于，
    所述电极组件包括第一侧面，所述第一极耳连接所述第一侧面，所述第一壳体、第一极耳和所述第一侧面共同限定出注液空间；
    所述第二壳体设有注液口，所述注液空间在所述第二壳体上的投影覆盖至少部分所述注液口。
  2. 如权利要求1所述的电池，其特征在于，所述注液口的中心轴位于所述注液空间内。
  3. 如权利要求2所述的电池，其特征在于，所述第一极耳包括靠近所述叠片电芯的第一面、远离所述叠片电芯的第二面以及连接于所述第一面和所述第二面之间的第二侧面；
    所述第一侧面包括平面区域和连接所述平面区域的弧面区域，所述平面区域、所述第二侧面与所述第一壳体限定出所述注液空间。
  4. 如权利要求3所述的电池，其特征在于，定义所述平面区域和所述弧面区域的连接处与所述第二侧面之间的距离为L，则所述注液口的中心轴与所述第二侧面之间的距离小于或等于0.5L。
  5. 如权利要求4所述的电池，其特征在于，所述注液口的中心轴与所述第二侧面之间的距离为0.4mm-1mm。
  6. 如权利要求1所述的电池，其特征在于，所述注液口中设有密封件。
  7. 如权利要求6所述的电池，其特征在于，所述注液口、所述密封件和所述第二壳体均为圆形，定义所述注液口的中心到所述第二壳体的中心之间的距离为M，所述第二壳体的半径为R 1，所述密封件的半径为R 2，则M、R 1和R 2满足关系：M＝R 1-R 2-0.2mm。
  8. 如权利要求1所述的电池，其特征在于，所述第二壳体还设有通孔，所述通孔中设有与所述第二壳体电绝缘的极柱。
  9. 如权利要求8所述的电池，其特征在于，所述电极组件包括堆叠设置的第一极片、第二极片及位于所述第一极片和所述第二极片之间的隔离膜，所述第一极耳连接所述第一极片，所述第二极片上连接有第二极耳，所述第二极耳电连接于所述极柱，所述第一极耳电连接于所述第一壳体或所述第二壳体。
  10. 如权利要求1所述的电池，其特征在于，所述第一壳体上设有通孔，所述通孔中设有与所述第一壳体电绝缘的极柱，所述第一极耳电连接于所述极柱。
  11. 一种用电装置，其特征在于，所述用电装置包括如权利要求1至10中任一项所述的电池。
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WO2021258304A1 (zh) * 2020-06-23 2021-12-30 宁德新能源科技有限公司 电池、电子装置和电池的装配方法
CN112331969B (zh) * 2020-11-13 2022-09-27 河北零点新能源科技有限公司 一种提高锂电池倍率的结构
WO2022109939A1 (zh) * 2020-11-26 2022-06-02 宁德新能源科技有限公司 电化学装置及电子设备
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WO2022198531A1 (zh) * 2021-03-24 2022-09-29 宁德新能源科技有限公司 电池和具有所述电池的电子装置
CN113937423A (zh) * 2021-09-30 2022-01-14 新余赣锋电子有限公司 一种扣式电池
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