WO2023216530A1 - 连接件及电池 - Google Patents

连接件及电池 Download PDF

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Publication number
WO2023216530A1
WO2023216530A1 PCT/CN2022/130039 CN2022130039W WO2023216530A1 WO 2023216530 A1 WO2023216530 A1 WO 2023216530A1 CN 2022130039 W CN2022130039 W CN 2022130039W WO 2023216530 A1 WO2023216530 A1 WO 2023216530A1
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WO
WIPO (PCT)
Prior art keywords
body part
hole
connector
battery
boundary line
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PCT/CN2022/130039
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English (en)
French (fr)
Inventor
岳亮亮
Original Assignee
湖北亿纬动力有限公司
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Publication date
Application filed by 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Priority to EP22826627.6A priority Critical patent/EP4297171A1/en
Priority to US18/091,395 priority patent/US20230369726A1/en
Publication of WO2023216530A1 publication Critical patent/WO2023216530A1/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
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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 technical field of power batteries, for example, to a connector and a battery.
  • Power batteries have been widely used in the fields of new energy pure electric vehicles and hybrid new energy vehicles. With the market's demand for long battery life, the research and development focus of large battery manufacturers has shifted to high energy density batteries. It is understandable that the higher the energy density of power batteries, the safety will be reduced accordingly, so improving the safety of power batteries has become a top priority.
  • One end of the connector of the cylindrical lithium-ion battery is used for laser welding current collection with the tab side of the winding core, and the other end is used for welding with the side wall of the casing to conduct the current out.
  • a commonly used process in the related art is to weld the connecting piece to the side wall and then seal it.
  • the side walls are overlapped with the bottom plane through rolling groove sealing.
  • the connector is bent. Since the contour of the bend of the connector is a curve, when the end welded to the side wall of the shell is bent inward, the internal stress generated at the bend causes the connection to The edge of the piece is deformed and sinks severely, causing the connecting piece to be inserted into the core. This may cause lithium precipitation in the slightest, or cause safety hazards in the worst case.
  • an embodiment of the present application provides a connector, including:
  • the connecting part is connected to the circumferential edge of the main body part, and the connecting part can rotate relative to the main body part, so that the connecting part can be arranged at an angle with the main body part, so A through hole is provided on the boundary line between the connecting part and the main body part.
  • the boundary line is an arc with the center of the body portion as the center, and the central angle ⁇ of the arc is 30°-60°.
  • the through hole is an oblong hole, and the long axis of the oblong hole is perpendicular to the boundary line.
  • the through hole is one of a diamond hole, a rectangular hole, or a round hole.
  • a plurality of connecting portions are provided at intervals along the circumferential direction of the main body portion, and avoidance grooves are respectively provided on the circumferential side surfaces of the main body portion between two adjacent connecting portions.
  • multiple boundary lines are located on the same circle.
  • grooves are formed on the circumferential side surfaces of the connecting piece at both ends of the boundary line.
  • the body portion is provided with a plurality of leakage holes.
  • a plurality of the through holes are spaced along the length direction of the boundary line.
  • an embodiment of the present application provides a battery, including a casing, a battery core winding body disposed in the casing, and the connector.
  • the casing is concavely provided with a through groove along the circumferential direction.
  • the main body part is electrically connected to one end electrode of the battery core winding body, and the connecting part is electrically connected to the inner surface of the through slot.
  • This application provides a connector and a battery.
  • the main body part of the connecting piece is used to connect the winding core tabs, and the connecting part is used to connect the housing.
  • the connecting part begins to rotate relative to the body part along with the housing.
  • the through hole opened on the junction line reduces the strength of the junction line.
  • the internal stress generated when the connecting part rotates inward towards the body part is small, and the internal stress generated can be released through the deformation of the through hole, which greatly improves the strength of the junction line.
  • the degree of sinking of the edge of the connecting piece is reduced, preventing the edge of the connecting piece from being inserted into the roll core during sealing of the rolling groove, thereby reducing potential safety hazards.
  • Figure 1 is a schematic structural diagram of a connector provided by an embodiment of the present application after the connecting portion is folded;
  • Figure 2 is a top view of the connecting portion of the connector provided by an embodiment of the present application after being folded;
  • Figure 3 is a top view of the connecting portion of the connector provided by an embodiment of the present application after it has been flattened;
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection; it can be a mechanical connection or a detachable connection.
  • It can be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components.
  • a first feature on a second feature may include the first feature and the second feature being in direct contact, or it may include that the first feature and the second feature are not in direct contact. Rather, it is through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the cylindrical lithium-ion battery includes a connector 1, which is connected to the tabs and the shell of the battery cell respectively, so that the battery shell is connected to the positive electrode or the negative electrode of the battery cell.
  • a connector 1 which is connected to the tabs and the shell of the battery cell respectively, so that the battery shell is connected to the positive electrode or the negative electrode of the battery cell.
  • the side walls are overlapped with the bottom plane through rolling groove sealing.
  • the connector 1 is bent. Since the contour of the bend of the connector 1 is a curve, when the end welded to the side wall of the housing 2 is bent inward, the internal pressure generated at the bend is The stress causes the edge of the connector 1 to deform and sink seriously, causing the connector 1 to be inserted into the core, causing lithium deposition or direct damage to the separator, and ultimately causing a safety accident due to short circuit of the positive and negative electrodes.
  • the connector 1 includes a body part 11 and a connection part 12.
  • the connection part 12 is connected to the circumferential edge of the body part 11.
  • the connection part 12 can be bent relative to the body part 11 so that The connecting part 12 can be arranged at an angle with the main body part 11 , and a through hole 14 is opened on the boundary 13 between the connecting part 12 and the main body part 11 .
  • the main body part 11 of the connecting piece 1 is configured to connect the winding core tabs
  • the connecting part 12 is configured to connect the housing 2.
  • the connecting part 12 starts to move relative to the main part 11 along with the housing 2.
  • the through hole 14 opened on the boundary line 13 reduces the strength of the boundary line 13 , and the internal stress generated when the connecting part 12 rotates inward toward the body part 11 is small, and the internal stress generated can pass through the through hole 14
  • the deformation is released, which greatly reduces the degree of sinking of the edge of the connecting piece 1, preventing the edge of the connecting piece 1 from being inserted into the core when sealing the rolling groove, and reducing safety hazards.
  • the boundary line 13 is an arc with the center of the body part 11 as the center of the circle, and the central angle ⁇ of the arc is 30°-60°.
  • the size of the central angle ⁇ corresponds to the length of the boundary line 13, and the length of the boundary line 13 should not be too long or too short. If the length of the boundary line 13 is too long, the welding area of the connecting part 12 and the housing 2 will be larger, which will easily Poor welding occurs. Moreover, the boundary line 13 is too long, and the internal stress generated during the rotation of the connecting part 12 relative to the main body part 11 is also large and difficult to release. If the length of the boundary line 13 is too short, the connection portion 12 and the housing 2 will be easily welded weakly and broken.
  • the central angle ⁇ corresponding to the intersection line 13 may be 35°, 40°, 45°, 50°, or 55°.
  • the through hole 14 is an oblong hole, and the long axis of the oblong hole is perpendicular to the boundary line 13 .
  • the long axis of the oblong hole is perpendicular to the boundary line 13. That is to say, the straight section of the oblong hole is almost perpendicular to the junction line 13.
  • the connecting part 12 is bent toward the body part 11, the straight section of the oblong hole has enough The deformation margin prevents the connecting piece 1 from twisting to the greatest extent, thereby protecting the diaphragm from damage.
  • the through hole 14 may also be one of a rhombus hole, a rectangular hole, or a round hole.
  • the through hole 14 is a rhombus hole, one diagonal line of the rhombus hole is perpendicular to the boundary line 13 .
  • the through hole 14 is a rectangular hole, a pair of opposite sides of the rectangular hole is perpendicular to the boundary line 13 .
  • a plurality of connecting portions 12 are provided at intervals along the circumferential direction of the body portion 11 , and the circumferential side surfaces of the body portion 11 are respectively provided with two adjacent connecting portions 12 .
  • the plurality of connection parts 12 are respectively welded to the case 2 to form electrical connections, which on the one hand can reduce the internal resistance of the battery, and on the other hand can ensure the connection strength between the connector 1 and the case 2 .
  • the provision of the relief groove 111 can also prevent the connector 1 from interfering with the housing 2 due to processing accuracy issues, and thus causing damage to the diaphragm, etc., thereby improving the safety of the battery.
  • intersection lines 13 are on the same circle. Since the housing 2 is cylindrical, arranging the plurality of boundary lines 13 on the same circumference can enable all the connecting parts 12 to fit closely with the housing 2, which facilitates welding and improves stability. When the shell 2 is roll-grooved, the deformation at each intersection line 13 remains consistent.
  • grooves 15 are respectively formed on the circumferential sides of the connector 1 at both ends of the boundary line 13 .
  • the groove 15 is partially located on the connecting portion 12 and partially located on the body portion 11 .
  • the arrangement of the groove 15 can further provide a place for the release of the internal stress generated when the connecting part 12 rotates relative to the body part 11, and can also prevent the two ends of the boundary line 13 from exceeding the outer contour of the connecting piece 1 and the shell 2.
  • the interference causes sinking, thereby greatly reducing the degree of distortion of the connector 1 and improving the safety of the battery.
  • the main body 11 is provided with a plurality of leakage holes 16 . After the battery is sealed, electrolyte needs to be injected into the battery through the injection hole. After the electrolyte flows to the connector 1, it can flow into the battery core winding body 3 through the leakage hole 16.
  • the boundary line 13 is provided with a plurality of through holes 14 spaced apart along its length direction.
  • the plurality of through holes 14 can significantly reduce the strength of the boundary line 13 , thereby reducing the internal stress generated when the connecting part 12 rotates relative to the body part 11 .
  • it can further provide a deformation margin for the release of internal stress and prevent the connecting piece 1 from being released. The sinking of the edge.
  • the connecting piece 1 is formed in one piece.
  • the connector 1 is integrally formed by stamping sheet-shaped raw materials, which has high production efficiency and high dimensional accuracy.
  • the battery includes a casing 2, a battery core winding body 3 disposed in the casing 2, and a connector 1.
  • the casing 2 is concavely provided with a through groove along the circumferential direction. 21.
  • the main body part 11 is electrically connected to one end electrode of the battery core winding body 3
  • the connecting part 12 is electrically connected to the inner surface of the through groove 21 .
  • This battery uses the above-mentioned connector 1.
  • the through hole 14 at the boundary 13 between the connector 12 and the body 11 can release the internal stress through deformation, thereby avoiding This prevents the edge of the connector 1 from sinking like the battery core winding body 3 and causing damage to the separator, thereby greatly improving the safety of the battery.

Landscapes

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

Abstract

本申请公开了一种连接件及电池，涉及动力电池技术领域，该连接件包括本体部及连接部。所述连接部与所述本体部的周向边缘相连接，所述连接部可相对于所述本体部弯折，以使所述连接部与所述本体部呈夹角设置，所述连接部与所述本体部的交界线上开设有通孔。该连接件能够在滚槽封口时防止边缘下沉插入卷芯中，降低了安全隐患，提高了安全性。

Description

连接件及电池
本申请要求申请日为2022年5月12日、申请号为202221146211.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及动力电池技术领域，例如涉及一种连接件及电池。
背景技术
动力电池已广泛应用在新能源纯电动汽车及混合动力新能源汽车领域，随着市场对电池长续航能力的需求，大电池厂商的研发重点转移到了高能量密度的电池上。可以理解的是，动力电池的能量密度越高，安全性就会相应降低，故而提高动力电池的安全性成为了重中之重。
圆柱锂离子电池的连接件的一端与卷芯极耳侧进行激光焊接集流，另一端用于与壳体的侧壁进行焊接，将电流传导出去。相关技术中常用的工艺是将连接件与侧壁焊接，然后进行封口。
为提高电池容量，需要保证壳体内部的空间利用率，一般将侧壁通过滚槽封口的方式与底部平面重叠在一起。但是，在滚槽的过程中，连接件发生弯折，由于连接件弯折处的轮廓为曲线，与壳体的侧壁焊接的一端向内弯折时，弯折处产生的内应力导致连接件的边缘变形而严重下沉，致使连接件插入到卷芯中，轻则导致析锂，重则引起安全隐患。
发明内容
本申请提出了一种连接件及电池，能够在滚槽封口时防止边缘下沉插入卷芯中，降低了安全隐患，提高了安全性。
第一方面，本申请一实施例提供了一种连接件，包括：
本体部；
连接部，所述连接部与所述本体部的周向边缘相连接，所述连接部能够相对于所述本体部转动，以使所述连接部能与所述本体部呈夹角设置，所述连接部与所述本体部的交界线上开设有通孔。
在一实施例中，所述交界线为以所述本体部中心为圆心的弧线，所述弧线 的圆心角α为30°-60°。
在一实施例中，所述连接部与所述本体部之间的夹角为180°时，所述通孔为长圆孔，所述长圆孔的长轴与所述交界线垂直。
在一实施例中，所述连接部与所述本体部之间的夹角为180°时，通孔为菱形孔、长方孔或圆孔中的一种。
在一实施例中，所述连接部沿所述本体部的周向间隔设置有多个，所述本体部的周向侧面在相邻的两个所述连接部之间分别设置有避让槽。
在一实施例中，多个所述交界线处于同一个圆周上。
在一实施例中，所述连接件的位于所述交界线的两端的周向侧面均开设有凹槽。
在一实施例中，所述本体部开设有多个漏液孔。
在一实施例中，所述交界线上沿自身长度方向间隔开设有多个所述通孔。
第二方面，本申请一实施例提供了一种电池，包括壳体、设置于所述壳体内的电芯卷绕体以及所述的连接件，所述壳体沿周向凹设有通槽，所述本体部与所述电芯卷绕体的一端电极电连接，所述连接部与所述通槽的内表面电连接。
本申请的有益效果：
本申请提供了一种连接件及电池。该连接件的本体部用于连接卷芯极耳，连接部用于连接壳体，当壳体开始滚槽封口时，连接部随着壳体开始相对于本体部转动。开设在交界线上的通孔使交界线处的强度降低，在连接部向内朝本体部转动的过程中产生的内应力较小，且产生的内应力能够通过通孔的变形释放掉，大大降低了连接件边缘下沉的程度，防止在滚槽封口时，连接件的边缘插入到卷芯中，降低了安全隐患。
附图说明
图1是本申请一实施例提供的连接件的连接部折起后的结构示意图；
图2是本申请一实施例提供的连接件的连接部折起后的俯视图；
图3是本申请一实施例提供的连接件的连接部展平后的俯视图；
图4是本申请一实施例提供的电池的局部剖视图。
图中：
1、连接件；2、壳体；3、电芯卷绕体；
11、本体部；12、连接部；13、交界线；14、通孔；15、凹槽；16、漏液孔；21、通槽；
111、避让槽。
具体实施方式
在本申请的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”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的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。其中，术语“第一位置”和“第二位置”为两个不同的位置。
除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接；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中的具体含义。
除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一特征和第二特征直接接触，也可以包括第一特征和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下面结合附图并通过具体实施方式来进一步说明本申请的技术方案。
随着新能源汽车市场的发展，提高动力电池的能量密度成为了电池厂商的研发重点。而高能量密度就必然伴随着高风险，故而提高动力电池的安全性成为了重中之重。
圆柱锂离子电池包括连接件1，连接件1分别与电芯的极耳及壳体连接，使得电池壳体与电芯的正极或负极相连。为提高电池容量，需要保证壳体2内部的空间利用率，一般将侧壁通过滚槽封口的方式与底部平面重叠在一起。
但是，在滚槽的过程中，连接件1发生弯折，由于连接件1弯折处的轮廓为曲线，与壳体2的侧壁焊接的一端向内弯折时，弯折处产生的内应力导致连接件1的边缘变形而严重下沉，致使连接件1插入到卷芯中，导致析锂或直接破坏隔膜，最终因正负极短路而引发安全事故。
为解决这个问题，本实施例提供了一种连接件1。如图1-图3所示，该连接件1包括本体部11与连接部12，连接部12与本体部11的周向边缘相连接，连接部12能够相对于本体部11弯折，以使连接部12能与本体部11呈夹角设置，连接部12与本体部11的交界线13上开设有通孔14。
该连接件1的本体部11设置为连接卷芯极耳，连接部12设置为连接壳体2，当壳体2开始滚槽封口时，连接部12随着壳体2开始相对于本体部11转动。开设在交界线13上的通孔14使交界线13处的强度降低，在连接部12向内朝本体部11转动的过程中产生的内应力较小，且产生的内应力能够通过通孔14的变形释放掉，大大降低了连接件1边缘下沉的程度，防止在滚槽封口时，连接件1的边缘插入到卷芯中，降低了安全隐患。
示例性地，如图3所示，交界线13为以本体部11中心为圆心的弧线，弧线的圆心角α为30°-60°。圆心角α的大小对应了交界线13的长度，而交界线13的长度不宜过长或过短，若交界线13的长度过长，则连接部12与壳体2的焊接面积较大，容易出现焊接不良的情况。而且交界线13过长，在连接部12相对于本体部11转动的过程中，产生的内应力也较大且不易释放。若交界线13的长度过短，则连接部12与壳体2容易焊接不牢固，容易发生断裂。示例性地，交界线13所对应的圆心角α可以为35°、40°、45°、50°、55°。
示例性地，如图3所示，连接部12与本体部11之间的夹角为180°时，通孔14为长圆孔，长圆孔的长轴与交界线13垂直。长圆孔的长轴与交界线13垂直，也就是说，长圆孔的直线段部分与交界线13近乎垂直，在连接部12朝本体部11弯折的过程中，长圆孔的直线段部分拥有足够的变形余量，最大程度地防止连接件1扭曲，从而保护隔膜不受损伤。
示例性地，连接部12与本体部11之间的夹角为180°时，通孔14还可以为菱形孔、长方孔或圆孔中的一种。其中，当通孔14为菱形孔时，菱形孔的一个对角线与交界线13垂直。当通孔14为长方孔时，长方孔的相对的一对侧边与交界线13垂直。
示例性地，如图1和图3所示，连接部12沿本体部11的周向间隔设置有多个， 本体部11的周向侧面在相邻的两个连接部12之间分别设置有避让槽111。多个连接部12分别与壳体2焊接形成电连接，一方面能够降低电池的内阻，另一方面还能够保证连接件1与壳体2之间的连接强度。避让槽111的设置还能够防止连接件1因加工精度的问题导致连接部12之外的部分与壳体2发生干涉而变形，进而可能会对隔膜等造成损伤，从而提高了电池的安全性。
示例性地，多个交界线13处于同一个圆周上。由于壳体2为圆柱形，将多个交界线13设置于同一个圆周上，能够使全部的连接部12分别能够与壳体2紧密贴合，便于焊接，也能够提升稳固性。当对壳体2进行滚槽封口时，每个交界线13处的变形情况保持一致。
示例性地，如图1-图3所示，连接件1位于交界线13的两端的周向侧面分别开设有凹槽15。示例性地，凹槽15部分位于连接部12上，部分位于本体部11上。凹槽15的设置能够进一步为连接部12相对于本体部11进行转动时产生的内应力的释放提供去处，同时还能够防止交界线13的两端超过连接件1的外轮廓与壳体2发生干涉而引起下沉，从而大大降低连接件1的扭曲程度，提高了电池的安全性。
示例性地，本体部11开设有多个漏液孔16。当电池封口后，需要通过注液孔向电池内注入电解液，电解液流到连接件1后，能够通过漏液孔16流入电芯卷绕体3内。
示例性地，交界线13上沿自身长度方向间隔开设有多个通孔14。多个通孔14能够大幅降低交界线13处的强度，从而降低连接部12相对于本体部11转动时产生的内应力，同时还能够进一步为内应力的释放提供变形余量，防止连接件1边缘的下沉。
示例性地，连接件1一体成型。该连接件1通过对片状的原材料进行冲压一体成型，生产效率高，尺寸精度高。
本实施例还提供了一种电池，如图4所示，该电池包括壳体2、设置于壳体2内的电芯卷绕体3以及连接件1，壳体2沿周向凹设有通槽21，本体部11与电芯卷绕体3的一端电极电连接，连接部12与通槽21的内表面电连接。
该电池使用了上述的连接件1，在对壳体2进行滚槽封口时，连接部12与本体部11之间的交界线13处的通孔14能够通过变形将内应力释放掉，从而避免了连接件1的边缘下沉如电芯卷绕体3而对隔膜造成损伤，大大提高了电池的安全性。

Claims (10)

  1. 一种连接件，包括：
    本体部(11)；
    连接部(12)，所述连接部(12)与所述本体部(11)的周向边缘相连接，所述连接部(12)可相对于所述本体部(11)弯折，以使所述连接部(12)与所述本体部(11)呈夹角设置，所述连接部(12)与所述本体部(11)的交界线(13)上开设有通孔(14)。
  2. 根据权利要求1所述的连接件，其中，所述交界线(13)为以所述本体部(11)中心为圆心的弧线，所述弧线的圆心角α为30°-60°。
  3. 根据权利要求1所述的连接件，其中，所述连接部(12)与所述本体部(11)之间的夹角为180°时，所述通孔(14)为长圆孔，所述长圆孔的长轴与所述交界线(13)垂直。
  4. 根据权利要求1所述的连接件，其中，所述连接部(12)与所述本体部(11)之间的夹角为180°时，所述通孔(14)为菱形孔、长方孔或圆孔中的一种。
  5. 根据权利要求1-4任一项所述的连接件，其中，所述连接部(12)沿所述本体部(11)的周向间隔设置有多个，所述本体部(11)的周向侧面在相邻的两个所述连接部(12)之间分别设置有避让槽(111)。
  6. 根据权利要求5所述的连接件，其中，多个所述交界线(13)处于同一个圆周上。
  7. 根据权利要求1-4任一项所述的连接件，其中，所述连接件的位于所述交界线(13)的两端的周向侧面分别开设有凹槽(15)。
  8. 根据权利要求1-4任一项所述的连接件，其中，所述本体部(11)开设有多个漏液孔(16)。
  9. 根据权利要求1-4任一项所述的连接件，其中，所述交界线(13)上沿自身长度方向间隔开设有多个所述通孔(14)。
  10. 一种电池，包括壳体(2)、设置于所述壳体(2)内的电芯卷绕体(3)以及如权利要求1-9中任一项所述的连接件，所述壳体(2)沿周向凹设有通槽(21)，所述本体部(11)与所述电芯卷绕体(3)的一端电极电连接，所述连接部(12)与所述通槽(21)的内表面电连接。
PCT/CN2022/130039 2022-05-12 2022-11-04 连接件及电池 WO2023216530A1 (zh)

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