WO2021253358A1 - 电池及具有所述电池的用电装置 - Google Patents

电池及具有所述电池的用电装置 Download PDF

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Publication number
WO2021253358A1
WO2021253358A1 PCT/CN2020/096895 CN2020096895W WO2021253358A1 WO 2021253358 A1 WO2021253358 A1 WO 2021253358A1 CN 2020096895 W CN2020096895 W CN 2020096895W WO 2021253358 A1 WO2021253358 A1 WO 2021253358A1
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WO
WIPO (PCT)
Prior art keywords
side wall
tab
wall area
battery
pole
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Application number
PCT/CN2020/096895
Other languages
English (en)
French (fr)
Inventor
王辉
方晓东
林礼清
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 CN202080099878.9A priority Critical patent/CN115398719A/zh
Priority to PCT/CN2020/096895 priority patent/WO2021253358A1/zh
Publication of WO2021253358A1 publication Critical patent/WO2021253358A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • 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
    • 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

  • This application relates to the field of batteries, and in particular to a battery and an electrical device having the battery.
  • a battery usually includes a casing, a top cover, and a battery cell. Wherein, the battery core is located inside the casing. In order to place the tabs in the casing, the tabs of the battery cores need to be cut, that is, the loss of tabs is exchanged for the placement space of the tabs, so that the battery’s The energy density is low.
  • the present application provides a battery including a casing and a battery cell contained in the casing.
  • the housing includes a first housing and a second housing mounted on the first housing.
  • the battery core is provided with a first tab.
  • the first housing includes an end surface and a side wall arranged around an edge of the end surface, and the second housing and the end surface are located on opposite sides of the side wall.
  • the sidewall includes a first sidewall region and a second sidewall region connected to the first sidewall region, and the second sidewall region protrudes from the first sidewall region and defines a first sidewall region.
  • the first tab is at least partially accommodated in the first accommodating space.
  • the first tab is completely contained in the first receiving space.
  • the second side wall region includes two first connecting surfaces connecting the first side wall region and a second connecting surface connecting between the two first connecting surfaces.
  • the end surface includes an arc segment and a fold line segment
  • the first side wall area is an arc side wall and connects the arc segment
  • the second side wall area connects the fold line segment.
  • the radius of the circle defined by the arc segment is defined as R, and the distance between the second connecting surface and the center of the circle defined by the arc segment is L 1 , then R and L 1 Satisfy the following relationship: 0.1mm ⁇ L 1 -R ⁇ 5mm.
  • the distance between the two first connecting surfaces is defined as L 2
  • the width of the first tab is W
  • L 2 and W satisfy the following relationship: 0.1mm ⁇ L 2- W ⁇ 1mm.
  • the second sidewall region is provided with a first pole that is electrically isolated from the second sidewall region, and the first pole lug is electrically connected to the first pole.
  • the first housing and the second housing are fixed by welding or by insulating pads, and a second tab is also provided on the battery, and the second tab is electrically connected to the ⁇ Said shell.
  • the sidewall further includes a third sidewall region connected to the first sidewall region, and the third sidewall region is protrudingly provided and defined compared to the first sidewall region. Exit the second containment space.
  • a second pole is provided on the third side wall area, and a second pole is also provided on the battery core, and the second pole is electrically connected to the second pole and At least partly housed in the second accommodating space.
  • the third side wall area is provided with an external connection surface corresponding to the second connection surface, and the second connection surface is clamped between the projection of the external connection surface on the end surface and the second connection surface.
  • the angle is 10 degrees to 180 degrees.
  • the sidewall further includes a fourth sidewall region connected to the first sidewall region, and the fourth sidewall region is flat.
  • a second tab is further provided on the battery core, and the second tab is electrically connected to the fourth side wall area.
  • the first housing and the second housing are fixed by insulating pads, the first tab is electrically connected to the first housing, and the battery is further provided with a second housing. A tab, and the second tab is electrically connected to the second housing.
  • the application also provides an electrical device, including the battery as described above.
  • the present application provides a protruding second side wall area in the side wall, and the first tab is at least partially housed in the second side wall area, so cutting can be avoided.
  • the pole piece is used in exchange for the placement space of the first tab, and at the same time, it can avoid the vacancy and waste of the space near the first tab and improve the energy density of the battery. That is, because the protruding second side wall area is provided to accommodate the first tab, the existence of the first tab can prevent the width of the pole piece itself from becoming smaller.
  • FIG. 1 is a schematic diagram of a battery structure according to an embodiment of the application.
  • Fig. 2 is a top view of the battery shown in Fig. 1.
  • Fig. 3 is a cross-sectional view of the battery shown in Fig. 1 taken along III-III.
  • FIG. 4 is a schematic diagram of a battery structure according to another embodiment of the application.
  • Fig. 5 is a cross-sectional view of the battery shown in Fig. 4.
  • FIG. 6 is a schematic diagram of a battery structure according to another embodiment of this application.
  • Fig. 7 is a cross-sectional view of a battery according to still another embodiment of the present application.
  • FIG. 8 is a module structure diagram of an electronic device according to an embodiment of the application.
  • the first pole piece 21 is the first pole piece 21
  • Second side wall area 113 Second side wall area 113
  • an embodiment of the present application provides a battery 100, which includes a casing 10 and a battery core 20 housed in the casing 10.
  • the housing 10 includes a first housing 11 and a second housing 12 mounted on the first housing 11.
  • the battery core 20 is provided with a first tab 210.
  • the first housing 11 includes an end surface 110 and a side wall 111 arranged around an edge of the end surface 110, and the second housing 12 and the end surface 110 are located on opposite sides of the side wall 111.
  • the sidewall 111 includes a first sidewall region 112 and a second sidewall region 113 connected to the first sidewall region 112.
  • the second sidewall region 113 is more convex than the first sidewall region 112.
  • the first accommodating space 1130 is set and defined.
  • the first tab 210 is at least partially received in the first receiving space 1130.
  • the battery cell 20 includes a first pole piece 21, an isolation film (not labeled), and a second pole piece 22.
  • the first pole piece 21, the isolation film, and the The second pole piece 22 can be laminated to form the battery core 20.
  • the first tab 210 is electrically connected to the first tab 21.
  • the first tab 210 needs to be bent into a U-shape.
  • the bent first tab 210 includes interconnections.
  • the first tab 211 and the second tab 212 are located between the first tab 211 and the first tab 21.
  • the first tab 210 is at least partially accommodated in the first accommodating space 1130.
  • first tab 211 is accommodated in the first accommodating space 1130, or all of the first tabs
  • the ear 211 is accommodated in the first accommodating space 1130, or all the first tab 211 and part of the second tab 212 are accommodated in the first accommodating space 1130.
  • a protruding second side wall region 113 is provided in the side wall 111, and the first tab 210 is at least partially housed in the second side wall region 113, so that cutting pole pieces can be avoided.
  • the protruding second side wall area 113 is provided to accommodate the first tab 210, the width of the pole piece itself can be prevented from being reduced due to the existence of the first tab 210, that is, the pole piece can be made into a circular shape, and it is no longer necessary to align the pole piece.
  • the pole piece is cut to leave a space in the housing 10 to place the first pole ear 210.
  • the first tab 210 is completely contained in the first receiving space 1130.
  • the first tab 210 does not occupy the width of the pole piece at all, thereby maximizing the energy density of the battery 100.
  • the first tab 210 is bent into a U shape, both the first tab 211 and the second tab 212 are completely contained in the first accommodating space 1130.
  • the second sidewall region 113 includes two first connection surfaces 1131 connected to the first sidewall region 112 and two first connection surfaces 1131 connected to the two first sidewall regions 112.
  • the end surface 110 includes a circular arc section 1101 and a fold line section 1102, the first side wall area 112 is a curved side wall and is connected to the circular arc section 1101, and the second side wall area 113 is connected to the fold line section 1102 .
  • the second side wall area 113 defines a first receiving space 1130 that is roughly rectangular parallelepiped, and the end surface 110 is approximately circular with one more corner.
  • the radius of the circle defined by the arc segment 1101 is defined as R, and the distance between the second connecting surface 1132 and the center O of the circle defined by the arc segment 1101 is L 1 , then R and L 1 Satisfy the following relationship: 0.1mm ⁇ L 1 -R ⁇ 5mm.
  • the difference between the distance L 1 and the radius R can be set according to the thickness of the first tab 210.
  • the end surface 110 may also be approximately elliptical, and the specific shape of the end surface 110 is not limited by the description in this application.
  • the distance between the two first connecting surfaces 1131 is defined as L 2, and the width of the first tab 210 is W, then L 2 and W satisfy the following relationship: 0.1 mm ⁇ L 2 -W ⁇ 1mm.
  • the distance L 2 is the width of the first accommodating space 1130 of the second side wall area 113, so that the width of the first tab 210 can be slightly smaller than the width of the first accommodating space 1130 , It is convenient to receive the first tab 210 in the first accommodating space 1130 during assembly.
  • the second sidewall region 113 is provided with a first pole 13 electrically isolated from the second sidewall region 113, and the first pole The ear 210 is electrically connected to the first pole 13.
  • an insulating glue (not shown) may be provided on the first tab 210, and the insulating glue is used to electrically isolate the first tab 210 and the side wall 111 to avoid contact short circuit.
  • the first pole 13 may be disposed on the second connection surface 1132.
  • the first pole 13 may also be disposed on the first connection surface 1131.
  • the first pole 13 may also be arranged on the second housing 12.
  • first housing 11 and the second housing 12 are fixed by welding or by insulating pads.
  • the battery core 20 is also provided with a second tab 220.
  • the dipole ear 220 is electrically connected to the housing 10.
  • the first pole 13 can exhibit the same electrical polarity as the first pole 210.
  • the second tab 220 may be electrically connected to the second housing 12 of the housing 10, or may be electrically connected to Any position of the first housing 11 of the housing 10 (for example, the first side wall area 112 or the end surface 110) can make the housing 10 as a whole present the same as the second tab 220 Electricity.
  • the first housing 11 and the second housing 12 are fixed by insulating pads, the first housing 11 and the second housing 12 are electrically isolated.
  • the second housing The tab 220 may be electrically connected to the second housing 12 of the housing 10, or may be electrically connected to any position of the first housing 11 of the housing 10 (for example, the first side wall area 112 or the The end surface 110) can make the part of the housing 10 electrically connected to the second tab 220 exhibit the same electrical polarity as the second tab 220.
  • the material of the first housing 11 and the second housing 12 may be metal.
  • the material of the first shell 11 and the second shell 12 may be steel alloy, aluminum alloy, iron alloy, copper alloy, nickel alloy, or the like.
  • the material of the first housing 11 and the second housing 12 is stainless steel.
  • the first shell 11 and the second shell 12 can be formed into desired shapes by using processes such as laser cutting and machine tool processing.
  • the first housing 11 can also be formed by stamping and forming a pit to accommodate the battery core 20.
  • the second housing 12 is provided with a liquid injection hole (not shown), and electrolyte can be injected through the liquid injection hole.
  • a liquid injection plug 14 is provided in the liquid injection hole, and the liquid injection plug 14 is used to seal the liquid injection hole to prevent the injected electrolyte from leaking or external impurities from entering the battery 100.
  • the liquid injection hole may also be located on the first housing 11.
  • another embodiment of the present application further provides a battery 200.
  • the sidewall 111 further includes a third sidewall region 114 connected to the first sidewall region 112, and the third sidewall region 114 is compared with the first sidewall region.
  • the area 112 protrudes and defines the second receiving space 1140.
  • a second pole 15 is provided on the third side wall region 114, and a second pole 220 is also provided on the battery core 20, and the second pole 220 is electrically connected to The second pole 15 is at least partially received in the second receiving space 1140.
  • a protruding third side wall region 114 is additionally provided in the side wall 111, and the second tab 220 is at least partially housed in the third side wall region 114, so that cutting pole pieces can be avoided In exchange for the placement space of the second tab 220, the energy density of the battery 200 can also be improved.
  • the third side wall region 114 is provided with an external connection surface corresponding to the second connection surface 1132, and the projection of the second connection surface 1132 and the external connection surface on the end surface 110 is different
  • the included angle ⁇ between is 10 degrees to 180 degrees.
  • the included angle ⁇ is the included angle between the projections of the first tab 210 and the second tab 220 on the end surface 110. As shown in Fig. 5, the included angle ⁇ may be 180 degrees.
  • the included angle ⁇ can be set according to the specific internal structure of the electrical device, so that the battery 200 can adapt to the internal space of the electrical device.
  • yet another embodiment of the present application further provides a battery 300.
  • the sidewall 111 further includes a fourth sidewall region 115 connected to the first sidewall region 112, and the fourth sidewall region 115 is flat.
  • the battery 300 can also be adapted to the internal space of the electric device, and it is convenient to electrically connect the second tab 220 to the fourth side wall region 115.
  • the battery 400 may have a first casing 11 and a second casing 12 having the same shape as the above-mentioned battery 100, 200, or 300.
  • the difference from the above-mentioned battery 100, 200, or 300 is that the first casing of the battery 400
  • the body 11 does not need to be provided with a pole.
  • the first housing 11 and the second housing 12 are fixed by a sealing ring (not shown), the first lug 210 is electrically connected to the first housing 11, and the second pole
  • the ear 220 is electrically connected to the second housing 12.
  • the first housing 11 can exhibit the same electrical polarity as the first tab 210
  • the second housing 12 can exhibit the same electrical polarity as the second tab 220, that is, it can also make The electrical polarity of the battery core 20 is led out through the first housing 11 and the second housing 12.
  • this application also provides an electric device 1, which includes the battery 100 (or the batteries 200, 300, 400) as described above.
  • the electrical device 1 may be a consumer electronic product, such as a smart phone. It can be understood that, in other embodiments, the electrical device 1 may also be an electric tool, an energy storage device, a power device, and the like. For example, the electrical device 1 may also be an electric vehicle.

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

Abstract

一种电池（100、200、300、400），包括外壳（10）和容置于外壳（10）内的电芯（20）。外壳（10）包括第一壳体（11）和安装于第一壳体（11）的第二壳体（12）。电芯（20）上设有第一极耳（210）。第一壳体（11）包括端面（110）和围绕端面（110）的边缘设置的侧壁（111），第二壳体（12）和端面（110）位于侧壁（111）相对的两侧。侧壁（111）包括第一侧壁区（112）和连接第一侧壁区（112）的第二侧壁区（113），第二侧壁区（113）相较于第一侧壁区（112）凸出设置并限定出第一收容空间（1130）。第一极耳（210）至少部分收容于第一收容空间内（1130）。

Description

电池及具有所述电池的用电装置 技术领域
本申请涉及电池领域，尤其涉及一种电池以及具有所述电池的用电装置。
背景技术
电池由于其便携性受到广大欢迎，在便携式电子设备等领域中有广泛的应用。众所周知，电池通常包括壳体、顶盖以及电芯等。其中，所述电芯位于所述壳体的内部，为了将极耳放置于壳体中，需要对电芯的极片进行切割，即以损失极片来换取极耳的放置空间，使得电池的能量密度低。
发明内容
有鉴于此，有必要提供一种能够提高电池能量密度的电池。
另，还有必要提供一种具有上述电池的用电装置。
本申请提供一种电池，包括外壳和容置于所述外壳内的电芯。所述外壳包括第一壳体和安装于所述第一壳体的第二壳体。所述电芯上设有第一极耳。所述第一壳体包括端面和围绕所述端面的边缘设置的侧壁，所述第二壳体和所述端面位于所述侧壁相对的两侧。所述侧壁包括第一侧壁区和连接所述第一侧壁区的第二侧壁区，所述第二侧壁区相较于所述第一侧壁区凸出设置并限定出第一收容空间。所述第一极耳至少部分收容于所述第一收容空间内。
在本申请一些方式中，所述第一极耳完全收容于所述第一收容空间内。
在本申请一些方式中，所述第二侧壁区包括两个连接所述第一侧壁区的第一连接面和连接于两个所述第一连接面之间的第二连接面。所述端面包括圆弧段和折线段，所述第一侧壁区为弧面侧壁且连接所述圆弧段，所述第二侧壁区连接所述折线段。
在本申请一些方式中，定义所述圆弧段所限定圆的半径为R，所述第二 连接面与所述圆弧段所限定圆的圆心之间的距离为L 1，则R和L 1满足以下关系：0.1mm≤L 1-R≤5mm。
在本申请一些方式中，定义两个所述第一连接面之间的距离为L 2，所述第一极耳的宽度为W，则L 2和W满足以下关系：0.1mm≤L 2-W≤1mm。
在本申请一些方式中，所述第二侧壁区上设有与所述第二侧壁区电性隔绝的第一极柱，所述第一极耳电连接所述第一极柱。
在本申请一些方式中，所述第一壳体和所述第二壳体焊接固定或通过绝缘垫固定，所述电芯上还设有第二极耳，所述第二极耳电连接所述外壳。
在本申请一些方式中，所述侧壁还包括连接所述第一侧壁区的第三侧壁区，所述第三侧壁区相较于所述第一侧壁区凸出设置并限定出第二收容空间。
在本申请一些方式中，所述第三侧壁区上设有第二极柱，所述电芯上还设有第二极耳，所述第二极耳电连接所述第二极柱并至少部分收容于所述第二收容空间内。
在本申请一些方式中，所述第三侧壁区对应所述第二连接面设置有外连接面，所述第二连接面与所述外连接面在所述端面上的投影之间的夹角为10度～180度。
在本申请一些方式中，所述侧壁还包括连接所述第一侧壁区的第四侧壁区，所述第四侧壁区为平面。
在本申请一些方式中，所述电芯上还设有第二极耳，所述第二极耳电连接所述第四侧壁区。
在本申请一些方式中，所述第一壳体和所述第二壳体通过绝缘垫固定，所述第一极耳电连接所述第一壳体，所述电芯上还设有第二极耳，所述第二极耳电连接所述第二壳体。
本申请还提供一种用电装置，包括如上所述的电池。
相较于现有技术，本申请在所述侧壁中设置凸出的第二侧壁区，并将所述第一极耳至少部分收容于所述第二侧壁区，因此能够避免用切割极片来换取所述第一极耳的放置空间，同时也能避免第一极耳附近的空间空置浪费，提高电池能量密度。即由于设置凸出的第二侧壁区以收容第一极耳，可以避 免第一极耳的存在导致极片自身宽度变小。
附图说明
图1为本申请一实施方式的电池结构示意图。
图2为图1所示的电池的顶视图。
图3为图1所示的电池沿III-III的剖视图。
图4为本申请另一实施方式的电池结构示意图。
图5为图4所示的电池的剖视图。
图6为本申请又一实施方式的电池结构示意图。
图7为本申请再一实施方式的电池的剖视图。
图8为本申请一实施方式的电子装置的模块架构图。
主要元件符号说明
用电装置          1
外壳              10
第一壳体          11
第二壳体          12
第一极柱          13
注液塞            14
第二极柱          15
电芯              20
第一极片          21
第二极片          22
电池              100、200、300、400
端面              110
侧壁              111
第一侧壁区        112
第二侧壁区        113
第三侧壁区        114
第四侧壁区        115
第一极耳          210
第一极耳部        211
第二极耳部        212
第二极耳          220
圆弧段            1101
折线段            1102
第一连接面        1131
第二连接面        1132
第二收容空间      1140
半径              R
圆心              O
距离              L 1、L 2
宽度              W
夹角             θ
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。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本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3，本申请一实施方式提供一种电池100，包括外壳10和容置于所述外壳10内的电芯20。所述外壳10包括第一壳体11和安装于所述第一壳体11的第二壳体12。所述电芯20上设有第一极耳210。
所述第一壳体11包括端面110和围绕所述端面110的边缘设置的侧壁111，所述第二壳体12和所述端面110位于所述侧壁111相对的两侧。所述侧壁111包括第一侧壁区112和连接所述第一侧壁区112的第二侧壁区113，所述第二侧壁区113相较于所述第一侧壁区112凸出设置并限定出第一收容空间1130。所述第一极耳210至少部分收容于所述第一收容空间1130内。
可以理解，如图3所示，所述电芯20包括第一极片21、隔离膜(图未标)和第二极片22，所述第一极片21、所述隔离膜和所述第二极片22可经叠片形成所述电芯20。所述第一极耳210电连接于所述第一极片21。通常，为了防止极耳受力拉伸导致极片错位短路，所述第一极耳210需要弯折成U型，如图3所示，经弯折的所述第一极耳210包括相互连接的第一极耳部211和第二极耳部212，所述第二极耳部212位于所述第一极耳部211和所述第一极片21之间。所述第一极耳210至少部分收容于所述第一收容空间1130内，可以是部分所述第一极耳部211收容于所述第一收容空间1130内，或是所有所述第一极耳部211收容于所述第一收容空间1130内，亦或是所有所述第一极耳部211和部分所述第二极耳部212收容于所述第一收容空间1130内。
本申请在所述侧壁111中设置凸出的第二侧壁区113，并将所述第一极耳210至少部分收容于所述第二侧壁区113，因此能够避免用切割极片来换取所述第一极耳210的放置空间，同时也能够避免第一极耳210附近的空间空置浪费，提高电池100能量密度。即由于设置凸出的第二侧壁区113以收容第一极耳210，可以避免第一极耳210的存在导致极片自身宽度变小，即极片可以制备成圆形，不再需要对极片进行切割以在外壳10中留出空间放置第一极耳210。
在本实施例中，所述第一极耳210完全收容于所述第一收容空间1130内。通过将所述第一极耳210完全收容于所述第一收容空间1130内，使得所述第一极耳210完全不占用极片自身宽度，从而使得电池100能量密度最大化。 例如，当所述第一极耳210弯折成U型时，所述第一极耳部211和所述第二极耳部212均完全收容于所述第一收容空间1130内。
如图1和图2所示，在本实施例中，所述第二侧壁区113包括两个连接所述第一侧壁区112的第一连接面1131和连接于两个所述第一连接面1131之间的第二连接面1132。所述端面110包括圆弧段1101和折线段1102，所述第一侧壁区112为弧面侧壁且连接所述圆弧段1101，所述第二侧壁区113连接所述折线段1102。在本实施例中，第二侧壁区113限定出大致呈长方体型的第一收容空间1130，所述端面110为多出一角的近似圆形。
进一步地，定义所述圆弧段1101所限定圆的半径为R，所述第二连接面1132与所述圆弧段1101所限定圆的圆心O之间的距离为L 1，则R和L 1满足以下关系：0.1mm≤L 1-R≤5mm。其中，所述距离L 1与所述半径R之间的差值可以根据所述第一极耳210的厚度进行设置。
当然，在其它实施例中，所述端面110也可以为近似椭圆形，所述端面110的具体形状不受本申请中记载限制。
更进一步地，如图2所示，定义两个所述第一连接面1131之间的距离为L 2，所述第一极耳210的宽度为W，则L 2和W满足以下关系：0.1mm≤L 2-W≤1mm。其中，所述距离L 2即为所述第二侧壁区113的第一收容空间1130的宽度，如此，可以使得所述第一极耳210的宽度稍小于所述第一收容空间1130的宽度，便于组装时将所述第一极耳210收容于第一收容空间1130中。
如图1和图3所示，在本实施例中，所述第二侧壁区113上设有与所述第二侧壁区113电性隔绝的第一极柱13，所述第一极耳210电连接所述第一极柱13。其中，所述第一极耳210上可设有绝缘胶(图未示)，所述绝缘胶用于将所述第一极耳210和所述侧壁111之间电性隔绝，避免接触短路。其中，请结合参照图1，所述第一极柱13可以设置于所述第二连接面1132上。当然，在其它实施例中，所述第一极柱13也可以设置于所述第一连接面1131上。在其它实施例中，所述第一极柱13也可设置在所述第二壳体12上。
进一步地，所述第一壳体11和所述第二壳体12焊接固定或通过绝缘垫固定，如图3所示，所述电芯20上还设有第二极耳220，所述第二极耳220 电连接所述外壳10。
如此，所述第一极柱13可呈现与所述第一极耳210相同的电极性。同时，当所述第一壳体11和所述第二壳体12通过焊接固定时，所述第二极耳220可以电连接于所述外壳10的第二壳体12，也可以电连接于所述外壳10的第一壳体11的任意位置(如，所述第一侧壁区112或所述端面110)，均能够使得所述外壳10整体呈现与所述第二极耳220相同的电极性。当所述第一壳体11和所述第二壳体12通过绝缘垫固定时，所述第一壳体11和所述第二壳体12之间电性隔绝，此时，所述第二极耳220可以电连接于所述外壳10的第二壳体12，也可以电连接于所述外壳10的第一壳体11的任意位置(如，所述第一侧壁区112或所述端面110)，均能够使得与所述第二极耳220电连接的部分外壳10呈现与所述第二极耳220相同的电极性。
所述第一壳体11和所述第二壳体12的材质可以为金属。如，所述第一壳体11和所述第二壳体12的材质可以为钢合金、铝合金、铁合金、铜合金、镍合金等。可选地，所述第一壳体11和所述第二壳体12的材质为不锈钢。
制备时，所述第一壳体11和所述第二壳体12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11还可以采用冲压成型形成冲坑以容纳所述电芯20。
如图1所示，在本实施例中，所述第二壳体12设有注液孔(图未示)，电解液可经所述注液孔注入。所述注液孔中设有注液塞14，所述注液塞14用于密封所述注液孔，避免注入的电解液漏出或避免外界杂质进入电池100内部。当然，所述注液孔还可以位于所述第一壳体11上。
请参阅图4和图5，本申请另一实施方式还提供一种电池200。与上述电池100不同之处在于，所述侧壁111还包括连接所述第一侧壁区112的第三侧壁区114，所述第三侧壁区114相较于所述第一侧壁区112凸出设置并限定出第二收容空间1140。
进一步地，如图5所示，所述第三侧壁区114上设有第二极柱15，所述电芯20上还设有第二极耳220，所述第二极耳220电连接所述第二极柱15并至少部分收容于所述第二收容空间1140内。
本申请在所述侧壁111中另外设置凸出的第三侧壁区114，并将所述第二极耳220至少部分收容于所述第三侧壁区114，因此能够避免用切割极片来换取所述第二极耳220的放置空间，同样能够提高电池200能量密度。
在本实施例中，所述第三侧壁区114对应所述第二连接面1132设置有外连接面，所述第二连接面1132与所述外连接面在所述端面110上的投影之间的夹角θ为10度～180度。所述夹角θ即为所述第一极耳210和所述第二极耳220在所述端面110上的投影之间的夹角。如图5所示，所述夹角θ可选为180度。所述夹角θ可以根据用电装置内部具体结构进行设置，使得所述电池200能够适应用电装置内部空间。
请一并参阅图6，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，所述侧壁111还包括连接所述第一侧壁区112的第四侧壁区115，所述第四侧壁区115为平面。
通过设置所述第四侧壁区115为平面，同样可以使所述电池300适应用电装置内部空间，而且，便于将第二极耳220电连接所述第四侧壁区115。
请一并参阅图7，本申请再一实施方式还提供一种电池400。所述电池400可以具有与上述电池100、200或300相同形状的第一壳体11和第二壳体12，与上述电池100、200或300不同之处在于，所述电池400的第一壳体11上不需设置极柱。此时，所述第一壳体11和所述第二壳体12通过密封圈(图未示)固定，所述第一极耳210电连接所述第一壳体11，所述第二极耳220电连接所述第二壳体12。
因此，所述第一壳体11可呈现与所述第一极耳210相同的电极性，所述第二壳体12可呈现与所述第二极耳220相同的电极性，即同样能够使得所述电芯20的电极性经所述第一壳体11和所述第二壳体12引出。
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包括如上所述的电池100(或电池200、300、400)。其中，所述用电装置1可以是消费性电子产品，如智能手机。可以理解，在其它实施方式中，所述用电装置1还可以为电动工具、储能装置、动力装置等。例如，所述用电装置1还可以是电动汽车。
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 (14)

  1. 一种电池，包括外壳和容置于所述外壳内的电芯，所述外壳包括第一壳体和安装于所述第一壳体的第二壳体，所述电芯上设有第一极耳，其特征在于，
    所述第一壳体包括端面和围绕所述端面的边缘设置的侧壁，所述第二壳体和所述端面位于所述侧壁相对的两侧；
    所述侧壁包括第一侧壁区和连接所述第一侧壁区的第二侧壁区，所述第二侧壁区相较于所述第一侧壁区凸出设置并限定出第一收容空间；
    所述第一极耳至少部分收容于所述第一收容空间内。
  2. 如权利要求1所述的电池，其特征在于，所述第一极耳完全收容于所述第一收容空间内。
  3. 如权利要求1所述的电池，其特征在于，所述第二侧壁区包括两个连接所述第一侧壁区的第一连接面和连接于两个所述第一连接面之间的第二连接面；
    所述端面包括圆弧段和折线段，所述第一侧壁区为弧面侧壁且连接所述圆弧段，所述第二侧壁区连接所述折线段。
  4. 如权利要求3所述的电池，其特征在于，定义所述圆弧段所限定圆的半径为R，所述第二连接面与所述圆弧段所限定圆的圆心之间的距离为L 1，则R和L 1满足以下关系：0.1mm≤L 1-R≤5mm。
  5. 如权利要求4所述的电池，其特征在于，定义两个所述第一连接面之间的距离为L 2，所述第一极耳的宽度为W，则L 2和W满足以下关系：0.1mm≤L 2-W≤1mm。
  6. 如权利要求3至5项中任一项所述的电池，其特征在于，所述第二侧壁区上设有与所述第二侧壁区电性隔绝的第一极柱，所述第一极耳电连接所述第一极柱。
  7. 如权利要求6所述的电池，其特征在于，所述第一壳体和所述第二壳体通过焊接或绝缘垫固定，所述电芯上还设有第二极耳，所述第二极耳电连 接所述外壳。
  8. 如权利要求6所述的电池，其特征在于，所述侧壁还包括连接所述第一侧壁区的第三侧壁区，所述第三侧壁区相较于所述第一侧壁区凸出设置并限定出第二收容空间。
  9. 如权利要求8所述的电池，其特征在于，所述第三侧壁区上设有第二极柱，所述电芯上还设有第二极耳，所述第二极耳电连接所述第二极柱并至少部分收容于所述第二收容空间内。
  10. 如权利要求8所述的电池，其特征在于，所述第三侧壁区对应所述第二连接面设置有外连接面，所述第二连接面与所述外连接面在所述端面上的投影之间的夹角为10度～180度。
  11. 如权利要求6所述的电池，其特征在于，所述侧壁还包括连接所述第一侧壁区的第四侧壁区，所述第四侧壁区为平面。
  12. 如权利要求11所述的电池，其特征在于，所述电芯上还设有第二极耳，所述第二极耳电连接所述第四侧壁区。
  13. 如权利要求1所述的电池，其特征在于，所述第一壳体和所述第二壳体通过绝缘垫固定，所述第一极耳电连接所述第一壳体，所述电芯上还设有第二极耳，所述第二极耳电连接所述第二壳体。
  14. 一种用电装置，其特征在于，包括如权利要求1至13项中任一项所述的电池。
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