WO2017152575A1 - 二次电池极耳及二次电池 - Google Patents

二次电池极耳及二次电池 Download PDF

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Publication number
WO2017152575A1
WO2017152575A1 PCT/CN2016/092775 CN2016092775W WO2017152575A1 WO 2017152575 A1 WO2017152575 A1 WO 2017152575A1 CN 2016092775 W CN2016092775 W CN 2016092775W WO 2017152575 A1 WO2017152575 A1 WO 2017152575A1
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WIPO (PCT)
Prior art keywords
tab
secondary battery
reinforcing
reinforcing groove
groove
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PCT/CN2016/092775
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English (en)
French (fr)
Inventor
巩毅涛
吴铁峰
武春龙
林景斌
郭超
张学文
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Publication of WO2017152575A1 publication Critical patent/WO2017152575A1/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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the field of energy storage device testing, and in particular to a secondary battery tab and a secondary battery.
  • Lithium-ion batteries have the advantages of high voltage, large specific energy, small self-discharge, and long cycle life. Since the commercialization of Sony Energy in the early 1990s, lithium-ion batteries have received extensive attention and in-depth research by researchers in various countries. They have been rapidly developed in the past 30 years and are now used in digital cameras. Mobile phones, laptops, power tools, electric bicycles, electric cars, and energy storage systems.
  • the tabs Due to the thinner ears (especially the tabs of copper foil), the tabs are prone to curling, folding and even tearing after being impacted, especially for multi-pole batteries, which have a greater chance of collision with the ears during winding. The extreme fold or tear of the ear will eventually affect the quality of the battery and even the appearance of bad products.
  • the present application provides a secondary battery tab and a secondary battery, which can solve the above problems.
  • the secondary battery tab provided in the first aspect of the embodiment of the present application includes the reinforcing groove formed on the tab.
  • the reinforcing groove is stamped and formed from the tab.
  • the reinforcing groove is a curved groove.
  • the reinforcing groove is a linear groove.
  • the reinforcing grooves are provided at least two and disposed in parallel with each other.
  • the reinforcing groove is parallel to the sides of the tab.
  • the reinforcing groove comprises a reinforcing groove stamped from one side of the tab, and a reinforcing groove formed by stamping from the other side of the tab.
  • the reinforcing groove and the reinforcing groove are spaced apart.
  • the reinforcing grooves are provided at least two and are arranged alternately with each other.
  • the reinforcing grooves are arranged in four rows, two in the middle are reinforcing grooves, and two on both sides are reinforcing grooves.
  • the inner surface of the reinforcing groove is a rounded curved surface.
  • the reinforcing groove has a semi-elliptical or semi-circular cross section.
  • the surface of the reinforcing groove and the tab is a smooth curved surface transition.
  • the end of the reinforcing groove is further formed with a transition section, and the depth of the transition section is uniformly reduced to a position with the tab by a position flush with the reinforcing groove along the extending direction of the reinforcing groove The surface is flush.
  • the width of the transition section is uniformly reduced from the position flush with the reinforcing groove to the both ends of the transition section along the extending direction of the reinforcing groove.
  • the inner surface of the transition section is a rounded curved surface.
  • the inner surface of the transition section is semi-conical.
  • a secondary battery provided by the second aspect of the present application includes a positive electrode sheet, a negative electrode sheet, a positive electrode tab and a negative electrode tab, wherein the positive electrode tab is electrically connected to the positive electrode tab, and the negative electrode tab is The negative electrode tab is electrically connected, and the positive electrode tab and/or the negative electrode tab are the secondary battery tabs.
  • the secondary battery tab provided by the embodiment of the present application has a long reinforcing groove formed on the tab to increase the strength of the tab, so that even if the tab is damaged during the battery manufacturing process, it is not easy. Curling, folding or tearing occurs to ensure the quality of the battery and improve the yield.
  • FIG. 1 is a schematic structural view of a tab of Embodiment 1 of the present application.
  • FIG. 2 is a schematic structural view of A1-A2 of FIG. 1.
  • FIG. 3 is a schematic structural view of a tab of Embodiment 2 of the present application.
  • FIG. 4 is a schematic structural view of B1-B2 in FIG. 3.
  • FIG. 5 is a schematic structural view of a tab of the embodiment 3 in FIG. 3B1-B2.
  • Figure 6 is a schematic view showing the structure of a tab of the embodiment 4 of the present invention.
  • Figure 7 is a schematic view showing the structure of a tab of the embodiment 5 of the present invention.
  • the embodiment of the present application provides a secondary battery tab.
  • a long reinforcing groove 3 is formed on the tab 2, and the width of the reinforcing groove 3 is generally 1 to 3 mm.
  • the reinforcing groove 3 protrudes from the surface of the tab 2, so that a multi-dimensional support can be formed, thereby increasing the strength of the tab 2, so that the tab 2 does not easily curl even if it is hit during the battery manufacturing process. Folding or tearing, thus ensuring the quality of the battery and improving the yield.
  • the number of reinforcing grooves 3 can be designed according to requirements, and generally more than one reinforcing groove 3 is provided, and these reinforcing grooves 3 can be parallel to each other (see Figs. 1 to 5) to greatly increase the tabs. 2 In the structural strength in one direction, these reinforcing grooves 3 may also cross each other (see Fig. 7), thereby increasing the overall strength of the tabs 2 to cope with forces from various directions. Moreover, the extending direction of the reinforcing grooves 3 is not mandatory, and may be a linear groove (see FIGS. 1 to 5) or a curved groove (see FIGS. 6 and 7).
  • the reinforcing groove 3 can be simultaneously projected toward both sides of the tab 2, that is, it can be either the reinforcing groove 31 or the reinforcing groove 32. This can simultaneously cope with the forces from both sides of the tab 2 and further increase the strength of the tab 2.
  • the reinforcing groove 3 in this embodiment can be generally obtained by press forming, and can of course be obtained by other means.
  • the processing of the reinforcing groove 3 is accompanied by the extension and deformation of the tab 2, in order to prevent tearing or breakage between the tab 2, especially the end of the tab 2 and the reinforcing groove 3, during processing, strengthening
  • the end of the groove 3 is also formed with a transition section 4 whose depth is uniformly reduced from the position flush with the reinforcing groove 3 to be flush with the surface of the tab 2 along the extending direction of the reinforcing groove 3. In this way, the local tear stress experienced by the tab 2 can be weakened, reducing the risk of tearing or breakage of the tab 2.
  • the width of the transition section 4 can also be uniformly reduced from the position flush with the reinforcing groove 3 along the extending direction of the reinforcing groove 3 to both ends of the transition section 4 to further reduce the width direction of the reinforcing groove 3.
  • the inner surface of the transition section 4 is preferably a rounded curved surface, such as a conical or other similar structure.
  • the curling, folding or tearing process of the tab 2 occurs mainly during transport, so the provision of the reinforcing groove 3 can effectively prevent the tab 2 from curling, folding or tearing during transport.
  • the tab 2 needs to be welded to the conductive sheet or other components.
  • the reinforcing groove 3 may affect the tightness of the bonding, thereby affecting the conductive effect of the tab 2. For this reason, it is necessary to flatten the tab 2 in the welding process so that the reinforcing groove 3 substantially disappears.
  • the inner surface of the reinforcing groove 3 can be designed as a rounded curved surface without sharp corners, thereby reducing the difficulty of flattening.
  • the smooth curved surface may be in many forms, for example, the cross section of the reinforcing groove 3 is designed to be semi-elliptical or semi-circular, or a closed figure formed by a rounded curved surface such as an ellipse, a circle or an oval may be intercepted in any manner. The shape formed.
  • the surface of the reinforcing groove 3 and the tab 2 preferably also adopts a smooth curved transition, further eliminating the sharp corners, reducing the difficulty of flattening, and also reducing the risk of tearing or breakage of the tab 2 during the molding process.
  • Embodiments 1 to 5 of the present application enumerate different specific embodiments of some secondary battery tabs.
  • the reinforcing groove 3 is a linear groove having a width of 2 mm, and the reinforcing groove 3 is provided with three, respectively comprising two reinforcing grooves 31 which are stamped and formed from the same surface of the tab 2, and one from the tab 2
  • the reinforcing groove 32 and the reinforcing groove 32 are arranged in parallel, and the reinforcing groove 32 is disposed between the two reinforcing grooves 31 such that the reinforcing groove 31 and the reinforcing groove 32 are spaced apart.
  • the strength of the tab 2 is further enhanced by the cooperation of the reinforcing groove 31 and the reinforcing groove 32.
  • Each of the reinforcing grooves 3 has a rectangular cross-sectional shape and is formed with a transition portion 4 at both ends.
  • the strength of the tab 2 is increased, so that the tab 2 does not easily curl, fold or tear even if it is hit during the battery manufacturing process. Crack, thus ensuring the quality of the battery and improving the yield.
  • the reinforcing groove 3 is provided with four, which are linear grooves, including two reinforcing grooves 31 and two reinforcing convex grooves 32, and the reinforcing groove 31 and the reinforcing convex groove 32 are arranged in parallel, and Parallel to the side of the tab 2, two reinforcing grooves 31 are disposed between the two reinforcing grooves 32.
  • the reinforcing grooves 31 and the reinforcing grooves 32 are provided to further strengthen the strength of the tab 2.
  • Each of the reinforcing grooves 3 has a rectangular cross-sectional shape, and a transition portion 4 is formed at one end close to the pole piece 1.
  • the difference between the present embodiment and the second embodiment is that the cross-sectional shape of each of the reinforcing grooves 3 is semicircular, and the surfaces of the reinforcing grooves 3 and the tabs 2 are transitioned by a smooth curved surface.
  • a secondary battery tab, the reinforcing groove 3 is a curved groove, and two are arranged, and two reinforcing grooves 3 are arranged side by side to be arranged on the tab 2 in an "eight" shape.
  • a secondary battery tab, the reinforcing groove 3 is a linear groove, and four are arranged, which are respectively staggered, so as to be distributed into two "cross” shape punching grooves, one "cross” reinforcing groove 3 and another " The reinforcing grooves 3 on the cross are connected, and are interlaced by the reinforcing grooves 3 to more fully strengthen the overall strength of the tabs 2.
  • a secondary battery includes a pole piece 1 and a tab 2 electrically connected to the pole piece 1, the pole piece 1 including a positive electrode tab and a negative electrode tab, and the tab 2 includes a positive electrode tab and a negative electrode
  • the tabs are electrically connected to the positive electrode tab
  • the negative electrode tab is electrically connected to the negative electrode tab
  • the positive electrode tab and/or the negative electrode tab are any of the above-mentioned secondary battery tabs.
  • the secondary battery may be a lithium ion battery, a sodium ion battery, a zinc ion battery or the like.

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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

一种二次电池极耳(2)及二次电池，涉及储能器件领域，所述极耳(2)成型有长条状的加强槽(3)，二次电池包括正极片、负极片、正极极耳和负极极耳，所述正极极耳与所述正极片电连接，所述负极极耳与所述负极片电连接，所述正极极耳和/或负极极耳为所述的二次电池极耳(2)，通过在极耳(2)上冲压成型有长条状的加强槽(3)，以增加极耳(2)的强度，使得在电池卷绕过程中，极耳(2)即使受到碰撞，也不会轻易发生卷曲、翻折或撕裂，从而保证了电池的质量，提高良品率。

Description

二次电池极耳及二次电池 技术领域
本申请涉及储能器件测试领域，尤其涉及一种二次电池极耳及二次电池。
背景技术
锂离子电池具有电压高、比能量大、自放电小、循环寿命长等优点。自上世纪九十年代初由索尼能源公司商品化以来，锂离子电池受到了各国科研人员的广泛关注和深入研究，并在过去的三十年中得到了快速发展，现在已经应用于数码相机、手机、笔记本电脑、电动工具、电动自行车、电动汽车以及储能系统等方面。
由于极耳较薄(尤其铜箔材质的极耳)，极耳受到碰撞后容易卷曲、翻折甚至撕裂，尤其是多极耳电池，其在卷绕过程中极耳受到碰撞的机率更大，极耳翻折或撕裂最终会影响电池的品质，甚至出现坏品。
发明内容
本申请提供了一种二次电池极耳及二次电池，能够解决上述问题。
本申请实施例第一方面所提供的二次电池极耳，包括所述极耳上成型有长条状的加强槽。
优选地，所述加强槽由所述极耳冲压成型。
优选地，所述加强槽为曲线槽。
优选地，所述加强槽为直线槽。
优选地，所述加强槽至少设置2个，且互相平行设置。
优选地，所述加强槽平行于所述极耳的侧边。
优选地，所述加强槽包括从极耳一面冲压成型的加强凹槽，以及从极耳另一面冲压成型的加强凸槽。
优选地，所述加强凹槽和所述加强凸槽间隔分布。
优选地，所述加强槽至少设置2个，且互相交错设置。
优选地，所述加强槽并排设置有4个，处于中间的2个为加强凹槽，处于两侧的2个为加强凸槽。
优选地，所述加强槽的内表面为圆滑曲面。
优选地，述加强槽的横截面为半椭圆形或半圆形。
优选地，所述加强槽与所述极耳的表面为圆滑曲面过渡。
优选地，所述加强槽的端部还成型有过渡段，所述过渡段的深度沿着所述加强槽的延伸方向由与所述加强槽齐平的位置均匀减小至与所述极耳的表面齐平。
优选地，所述过渡段的宽度沿着所述加强槽的延伸方向由与所述加强槽齐平的位置均匀减小至所述过渡段的两端闭合。
优选地，所述过渡段的内表面为圆滑曲面。
优选地，所述过渡段的内表面呈半圆锥状。
本申请实施例第二方面所提供的一种二次电池，包括正极片、负极片、正极极耳和负极极耳，所述正极极耳与所述正极片电连接，所述负极极耳与所述负极片电连接，所述正极极耳和/或负极极耳为所述的二次电池极耳。
本申请实施例提供的技术方案可以达到以下有益效果：
本申请实施例所提供的二次电池极耳通过在极耳上成型有长条状的加强槽，以增加极耳的强度，使得在电池制造过程中，极耳即使受到碰撞，也不会轻易发生卷曲、翻折或撕裂，从而保证了电池的质量，提高良品率。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
图1为本申请实施例1极耳的结构示意图。
图2为图1中A1-A2的结构示意图。
图3为本申请实施例2极耳的结构示意图。
图4为图3中B1-B2的结构示意图。
图5为本申请实施例3极耳在图3中B1-B2的结构示意图。
图6为本实用新型实施例4极耳的结构示意图。
图7为本实用新型实施例5极耳的结构示意图。
附图标记：
1-极片；
2-极耳；
3-加强槽；
  31-加强凹槽；
  32-加强凸槽；
4-过渡段。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
下面通过具体的实施例并结合附图对本申请做进一步的详细描述。文中所述“前”、“后”、“左”、“右”、“上”、“下”均以附图中的二次电池极耳及二次电池的放置状态为参照。
本申请实施例提供了一种二次电池极耳，如图1至7所示，在极耳2上成型有长条状的加强槽3，加强槽3的宽度一般为1～3mm。加强槽3要凸出于极耳2的表面，因此能够形成多维度的支撑，从而提高极耳2的强度，使得在电池制造过程中，极耳2即使受到碰撞，也不会轻易发生卷曲、翻折或撕裂，从而保证了电池的质量，提高良品率。
在极耳2上，加强槽3的数量可以根据需求进行设计，一般情况下会设置不止一条加强槽3，这些加强槽3之间可以相互平行(参见图1至5)，以大幅提高极耳2在一个方向上的结构强度，这些加强槽3相互之间也可以存在交叉(参见图7)，从而提高极耳2的综合强度，以应对来自各个方向的作用力。并且，这些加强槽3的延伸方向没有强制要求，可以为直线槽(参见图1至5)，也可以为曲线槽(参见图6和图7)。
此外，如图4和5所示，加强槽3可以同时朝向极耳2的两侧凸出，也就是既可以为加强凹槽31，也可以为加强凸槽32。这样能够同时应对来自极耳2两侧的作用力，进一步提高极耳2的强度。
本实施例中的加强槽3一般可通过冲压成型方式获得，当然也可以通过其它方式获得。但一般加强槽3的加工过程都会伴随这极耳2的延展和形变，为了防止极耳2，尤其是极耳2与加强槽3的端部之间在加工过程中发生撕裂或破损，加强槽3的端部还成型有过渡段4，过渡段4的深度沿着加强槽3的延伸方向由与加强槽3齐平的位置均匀减小至与极耳2的表面齐平。通过这种方式可以弱化极耳2所受到的局部撕裂应力，降低极耳2被撕裂或破损的风险。与此同时，过渡段4的宽度也可以沿着加强槽3的延伸方向由与加强槽3齐平的位置均匀减小至过渡段4的两端闭合，以进一步减小在加强槽3宽度方向上的撕裂应力。过渡段4的内表面最好为圆滑曲面，例如办圆锥状或其它类似结构。
极耳2的卷曲、翻折或撕裂过程主要发生在输送过程中，因此设置加强槽3能够有效防止极耳2在输送过程中卷曲、翻折或撕裂。但是在极耳2完成输送抵达焊接工序后，极耳2需要与导电片或其它部件贴合焊接，此时加强槽3便可能影响贴合的紧密度，进而影响极耳2的导电效果。为此，需要在焊接工序中再将极耳2压平，使加强槽3基本消失。而如果加强槽3存在尖角，则较难被压平，因此可以将加强槽3的内表面设计为没有尖角的圆滑曲面，从而降低压平难度。圆滑曲面可以由许多形式，例如将加强槽3的横截面设计为半椭圆形或者半圆形，亦或者是将椭圆形、圆形或者卵形等由圆滑曲面形成的闭合图形以任意方式截取一段所形成的形状。
此外，加强槽3与极耳2的表面最好也采用圆滑曲面过渡，进一步消除尖角，降低压平难度，同时也能够降低成型过程中极耳2撕裂或破损的风险。
本申请的实施例1至实施例5列举了一些二次电池极耳的不同具体实施例。
实施例1
如图1和图2所示，一种二次电池极耳，极耳2冲压成型有长条状的加强槽3。加强槽3为直线槽，其宽度为2mm，加强槽3设置3个，分别包括2个从极耳2同一面冲压成型的加强凹槽31，和1个从极耳2另一 面冲压成型的加强凸槽32，加强凹槽31和加强凸槽32平行设置，且加强凸槽32设置在2个加强凹槽31之间，使得加强凹槽31和加强凸槽32间隔分布，利用加强凹槽31和加强凸槽32配合设置，进一步加强极耳2的强度。每条加强槽3的横截面形状均为矩形，并且在两端均成型有过渡段4。
通过在极耳2上冲压成型有长条状的加强槽3，以增加极耳2的强度，使得在电池制造过程中，极耳2即使受到碰撞，也不会轻易发生卷曲、翻折或撕裂，从而保证了电池的质量，提高良品率。
实施例2
如图3和图4所示，本实施例与实施例1的区别在于：
一种二次电池极耳，加强槽3设置有4个，皆为直线槽，其中包括2个加强凹槽31和2个加强凸槽32，加强凹槽31和加强凸槽32平行设置，且平行于极耳2的侧边，2个加强凹槽31设置在2个加强凸槽32之间，利用加强凹槽31和加强凸槽32配合设置，进一步加强极耳2的强度。每条加强槽3的横截面形状均为矩形，并且在靠近极片1的一端均成型有过渡段4。
其它与实施例1相同，在此不再赘述。
实施例3
如图5所示，本实施例与实施例2的区别在于：每条加强槽3的横截面形状均为半圆形，并且加强槽3与极耳2的表面通过圆滑曲面过渡。
其它与实施例2相同，在此不再赘述。
实施例4
如图6所示，本实施例与实施例1的区别在于：
一种二次电池极耳，加强槽3为曲线槽，设置有2个，2个加强槽3并排显“八”字型设置在极耳2上。
其它与实施例1相同，在此不再赘述。
实施例5
如图7所示，本实施例与实施例1的区别在于：
一种二次电池极耳，加强槽3为直线槽，设置有4个，分别交错设置，从而分布成两个“交叉”形状冲压槽痕，一“交叉”上的加强槽3与另一“交叉”上的加强槽3连通，通过加强槽3互相交错设置，以更全面加强极耳2的整体强度。
其它与实施例1相同，在此不再赘述。
实施例6
如图1到7所示，一种二次电池，包括极片1和电连接在极片1上的极耳2，极片1包括正极片和负极片，极耳2包括正极极耳和负极极耳，正极极耳与正极片电连接，负极极耳与负极片电连接，正极极耳和/或负极极耳为任一上述的二次电池极耳。
二次电池可以为锂离子电池，钠离子电池，锌离子电池等。
根据上述说明书的揭示和教导，本实用新型所属领域的技术人员还能够对上述实施方式进行变更和修改。因此，本实用新型并不局限于上述的具体实施方式，凡是本领域技术人员在本实用新型的基础上所作出的任何显而易见的改进、替换或变型均属于本实用新型的保护范围。此外，尽管本说明书中使用了一些特定的术语，但这些术语只是为了方便说明，并不对本实用新型构成任何限制。

Claims (18)

  1. 一种二次电池极耳，其特征在于，所述极耳上成型有长条状的加强槽。
  2. 根据权利要求1所述的一种二次电池极耳，其特征在于：所述加强槽由所述极耳冲压成型。
  3. 根据权利要求1所述的一种二次电池极耳，其特征在于：所述加强槽为曲线槽。
  4. 根据权利要求1所述的一种二次电池极耳，其特征在于：所述加强槽为直线槽。
  5. 根据权利要求4所述的一种二次电池极耳，其特征在于：所述加强槽至少设置2个，且互相平行设置。
  6. 根据权利要求4所述的一种二次电池极耳，其特征在于：所述加强槽平行于所述极耳的侧边。
  7. 根据权利要求1所述的一种二次电池极耳，其特征在于：所述加强槽包括从极耳一面冲压成型的加强凹槽，以及从极耳另一面冲压成型的加强凸槽。
  8. 根据权利要求7所述的一种二次电池极耳，其特征在于：所述加强凹槽和所述加强凸槽间隔分布。
  9. 根据权利要求1所述的一种二次电池极耳，其特征在于：所述加强槽至少设置2个，且互相交错设置。
  10. 根据权利要求7所述的一种二次电池极耳，其特征在于：所述加强槽并排设置有4个，处于中间的2个为加强凹槽，处于两侧的2个为加强凸槽。
  11. 根据权利要求1至10任一项所述的一种二次电池极耳，其特征在于：所述加强槽的内表面为圆滑曲面。
  12. 根据权利要求11所述的一种二次电池极耳，其特征在于：所述加强槽的横截面为半椭圆形或半圆形。
  13. 根据权利要求11所述的一种二次电池极耳，其特征在于：所述加强槽与所述极耳的表面为圆滑曲面过渡。
  14. 根据权利要求1至10任一项所述的一种二次电池极耳，其特征在于：所述加强槽的端部还成型有过渡段，所述过渡段的深度沿着所述加强槽的延伸方向由与所述加强槽齐平的位置均匀减小至与所述极耳的表面齐平。
  15. 根据权利要求14所述的一种二次电池极耳，其特征在于：所述过渡段的宽度沿着所述加强槽的延伸方向由与所述加强槽齐平的位置均匀减小至所述过渡段的两端闭合。
  16. 根据权利要求15所述的一种二次电池极耳，其特征在于：所述过渡段的内表面为圆滑曲面。
  17. 根据权利要求16所述的一种二次电池极耳，其特征在于：所述过渡段的内表面呈半圆锥状。
  18. 一种二次电池，包括正极片、负极片、正极极耳和负极极耳，所述正极极耳与所述正极片电连接，所述负极极耳与所述负极片电连接，其特征在于：所述正极极耳和/或负极极耳为权利要求1～17任一项所述的二次电池极耳。
PCT/CN2016/092775 2016-03-08 2016-08-02 二次电池极耳及二次电池 Ceased WO2017152575A1 (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112490594A (zh) * 2019-08-23 2021-03-12 宁德新能源科技有限公司 极耳、极片及电池
CN115631177A (zh) * 2022-10-31 2023-01-20 广东利元亨智能装备股份有限公司 电芯极耳检测方法和计算机可读存储介质
KR20230020572A (ko) * 2021-05-07 2023-02-10 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 전극 어셈블리, 배터리, 장치 및 전극 어셈블리의 제조 방법
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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN115249876A (zh) * 2021-04-27 2022-10-28 荣盛盟固利新能源科技有限公司 电池极耳及电池
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CN119678262A (zh) * 2023-04-26 2025-03-21 宁德时代新能源科技股份有限公司 极片、电极组件、电池单体、电池和用电设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01127169U (zh) * 1988-02-24 1989-08-30
JPH04218260A (ja) * 1990-12-17 1992-08-07 Yuasa Corp 鉛蓄電池用極板
JPH07326359A (ja) * 1994-06-01 1995-12-12 Matsushita Electric Ind Co Ltd 鉛蓄電池用極板
JPH11111329A (ja) * 1997-10-02 1999-04-23 Shin Kobe Electric Mach Co Ltd 鉛蓄電池及びその製造法
CN101276897A (zh) * 2007-03-30 2008-10-01 Tdk株式会社 电化学元件
CN102104134A (zh) * 2011-01-28 2011-06-22 福建南平南孚电池有限公司 锂电池的极耳、具有该极耳的负极结构和锂电池
CN102403540A (zh) * 2010-09-13 2012-04-04 新神户电机株式会社 铅蓄电池及铅蓄电池用集电体的制造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01127169U (zh) * 1988-02-24 1989-08-30
JPH04218260A (ja) * 1990-12-17 1992-08-07 Yuasa Corp 鉛蓄電池用極板
JPH07326359A (ja) * 1994-06-01 1995-12-12 Matsushita Electric Ind Co Ltd 鉛蓄電池用極板
JPH11111329A (ja) * 1997-10-02 1999-04-23 Shin Kobe Electric Mach Co Ltd 鉛蓄電池及びその製造法
CN101276897A (zh) * 2007-03-30 2008-10-01 Tdk株式会社 电化学元件
CN102403540A (zh) * 2010-09-13 2012-04-04 新神户电机株式会社 铅蓄电池及铅蓄电池用集电体的制造方法
CN102104134A (zh) * 2011-01-28 2011-06-22 福建南平南孚电池有限公司 锂电池的极耳、具有该极耳的负极结构和锂电池

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112490594A (zh) * 2019-08-23 2021-03-12 宁德新能源科技有限公司 极耳、极片及电池
CN112490594B (zh) * 2019-08-23 2023-02-28 东莞新能安科技有限公司 极耳、极片及电池
KR20230020572A (ko) * 2021-05-07 2023-02-10 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 전극 어셈블리, 배터리, 장치 및 전극 어셈블리의 제조 방법
KR102736762B1 (ko) * 2021-05-07 2024-11-29 컨템포러리 엠퍼렉스 테크놀로지 (홍콩) 리미티드 전극 어셈블리, 배터리, 장치 및 전극 어셈블리의 제조 방법
WO2024037533A1 (zh) * 2022-08-16 2024-02-22 欣旺达动力科技股份有限公司 极片、电池和用电设备
CN115631177A (zh) * 2022-10-31 2023-01-20 广东利元亨智能装备股份有限公司 电芯极耳检测方法和计算机可读存储介质

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