WO2016187815A1 - 一种圆柱形高倍率锂离子电池 - Google Patents

一种圆柱形高倍率锂离子电池 Download PDF

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WO2016187815A1
WO2016187815A1 PCT/CN2015/079832 CN2015079832W WO2016187815A1 WO 2016187815 A1 WO2016187815 A1 WO 2016187815A1 CN 2015079832 W CN2015079832 W CN 2015079832W WO 2016187815 A1 WO2016187815 A1 WO 2016187815A1
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tab
plate
lithium ion
ion battery
cylindrical
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PCT/CN2015/079832
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French (fr)
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罗明镜
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罗明镜
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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
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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

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  • the present invention relates to the field of secondary battery technology, and in particular to a cylindrical high-rate lithium ion battery.
  • lithium-ion batteries have been widely used due to their high operating voltage, high energy density, no memory effect, long cycle life and no pollution, and their performance requirements have been continuously improved.
  • the original capacity lithium battery has been widely used in portable electronic devices such as mobile phones, notebook computers, digital cameras, etc.
  • high-current high-rate discharge power lithium batteries are also used in power tools, battery cars, miner's lamps, etc. Inseparable electronic devices.
  • the most common method for fabricating bare cells of lithium batteries today is to use a winding method: that is, a single tab of the positive and negative electrode sheets is welded to one end of the strip-shaped positive and negative electrode sheets, and a diaphragm winding is placed between the positive and negative electrode sheets.
  • the lithium battery bare cell is characterized by simple process and high production efficiency. In a single pole mode, when the lithium ion battery is discharged at a large rate, the ear is extremely hot, and the overall temperature of the battery is too high, so that the battery is easily out of control, resulting in poor battery discharge performance and cycle performance.
  • the present invention provides a cylindrical high-rate lithium ion battery comprising a cylindrical wound lithium battery core, the lithium battery core comprising a positive electrode sheet, a negative electrode sheet, and disposed between the positive electrode sheet and the negative electrode sheet
  • the separator wherein the positive electrode sheet is provided with a first tab, a second tab, a third tab and a fourth tab, the tabs each having a width of 4-6 mm, and the first tab distance
  • the length of one end portion of the positive electrode sheet is 25-27 mm
  • the length of the second tab from the first tab is 58-60 mm
  • the length of the third tab from the second tab is 58-60 mm.
  • the length of the fourth tab from the third tab is 58-60 mm; all the tabs are joined together by laser welding after winding.
  • the first tab, the second tab, the third tab and the fourth tab are respectively located around the center of the cylindrical lithium battery core and are symmetrically distributed in the center.
  • first tab, the second tab, the third tab and the fourth tab are respectively bent toward the center of the cylindrical lithium battery, and then the first tab and the third tab are at the center of the cylindrical lithium battery core Further bent outward along the axis of the lithium battery cell to cause the first tab and the third tab to be in abutting connection.
  • the positive electrode sheet is provided with a white space, and the first, second, third and fourth tabs are respectively connected to the positive electrode through corresponding blank areas.
  • the blank area has a width of 10 to 12 mm.
  • the positive electrode sheet has a width of 57 to 58 mm.
  • the lithium ion battery provided by the invention has four tabs arranged in the positive electrode sheet, and after the positive pole piece is wound, the four tabs are close to the center of the core, which can significantly reduce the internal resistance of the battery core, and can realize high-rate continuous discharge.
  • the instantaneous discharge is up to 40C; and because the four poles are close to the center of the core and are distributed symmetrically around the center of the core, it is beneficial to the ear soldering and is more conducive to battery safety.
  • FIG. 1 is a schematic structural view of a lithium battery core according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a positive electrode sheet according to an embodiment of the present invention.
  • a cylindrical high-rate lithium ion battery provided by the embodiment includes a cylindrical wound lithium battery core 1 , and the lithium battery core 1 includes a positive electrode sheet 10 , a negative electrode sheet 20 , and The separator 30 between the positive electrode sheet 10 and the negative electrode sheet 20 is formed by laminating the positive electrode sheet 10, the negative electrode sheet 20, and the separator 30.
  • the positive electrode tab 10 is provided with a first tab 101, a second tab 102, a second tab 103 and a fourth tab 104.
  • the first tab 101 is away from the positive pole.
  • the length L1 of one end of the sheet 10 is set between 25 and 27 mm
  • the length L2 of the second tab 102 from the first tab 101 is set between 58 and 60 mm
  • the distance of the third tab 103 is set between 58 and 60 mm
  • the length L3 of the second tab 102 is set between 58 and 60 mm
  • the fourth tab 104 is disposed from the length L4 of the third tab 103.
  • all of the tabs 101, 102, 103, 104 are joined together by laser welding after winding.
  • All of the tabs 101, 102, 103, and 104 have a width of 4 to 6 mm, and the positive electrode tab 10 has a width D of 57 to 58 mm. More specifically, the positive electrode sheet 10 is provided with a blank area 105, and all the tabs 101, 102, 103, 104 are respectively connected to the positive electrode sheet 10 through corresponding blank areas 105; the blank area The width of 105 is 10 to 12 mm.
  • the first tab 101, the second tab 102, the second tab 103, and the fourth tab 104 are respectively located around the center of the cylindrical lithium battery 1 and near the cylinder.
  • the center of the lithium battery 1 has four central ears symmetrically distributed.
  • the first tab 101, the second tab 102, the third tab 103, and the fourth tab 104 are first bent toward the center of the cylindrical lithium battery 1, respectively, and then the first tab 101 and the third tab 103 At the center of the cylindrical lithium battery 1 is further bent outward along the axis of the lithium battery cell 1. Finally, all the tabs are connected together by laser welding.
  • the positive electrode sheet is provided with four tabs. After the positive pole piece is wound, the four tabs are close to the center of the core, which can significantly reduce the internal resistance of the battery core, and can achieve high rate continuous discharge. Instant discharge up to 40C; and because the four tabs are close to the center of the core and are distributed symmetrically around the center of the core, it is beneficial for the ear soldering and battery safety.

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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)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本发明公开了一种卷绕式锂离子电池，其包括圆柱状的卷绕式锂电芯，所述锂电芯包括正极片、负极片以及设置于所述正极片和负极片之间的隔膜，其中，所述正极片上设置有第一极耳和第二极耳，所述第一极耳和第二极耳的宽度均为4～6mm，所述第一极耳距离正极片一端部的长度为25～27mm，所述第二极耳距离所述第一极耳的长度为58～60mm；在卷绕后通过激光焊接将所述第一极耳和第二极耳连接。锂离子电池中的正极片设置两个极耳，在正极极片卷绕后，两个极耳靠近卷芯中心，可明显降低电芯内阻，可实现高倍率持续放电，瞬间放电高达30C。

Description

一种圆柱形高倍率锂离子电池 技术领域
本发明涉及二次电池技术领域，具体涉及一种圆柱形高倍率锂离子电池。
背景技术
近年来，因锂离子电池具有工作电压高，能量密度大、无记忆效应、循环寿命长和无污染等优点使其应用领域不断拓宽，同时对其各方面的性能要求也不断提高。随着锂电池在日常生活中的应用，人们渐渐了解并肯定了锂电池相对其他体系电池的优越性，对锂电池的要求和期望也逐渐提高。最初的容量型锂电池已广泛应用于手机、笔记本电脑、数码相机等便携式电子设备中，现在大电流高倍率放电的动力型锂电池也开始应用于电动工具、电瓶车、矿灯等与人们生产生活密不可分的电子设备中。
众所周知，现今制作锂电池裸电芯较为普遍的方法是采用卷绕式方法：即正负电极片的单个极耳焊接在条状正负电极片的一端，正负电极片之间放置隔膜卷绕而成锂电池裸电芯，其特点是工艺简单，生产效率高。采用单个极耳的方式，当锂离子电池在大倍率放电时，极耳发热严重，电池整体温度过高，使得电池容易热失控，从而导致电池倍率放电性能和循环性能变差。
发明内容
有鉴于此，本发明提供了一种圆柱形高倍率锂离子电池，包括圆柱状的卷绕式锂电芯，所述锂电芯包括正极片、负极片以及设置于所述正极片和负极片之间的隔膜，其中，所述正极片上设置有第一极耳、第二极耳、第三极耳和第四极耳，所述极耳的宽度均为4～6mm，所述第一极耳距离正极片一端部的长度为25～27mm，所述第二极耳距离所述第一极耳的长度为58～60mm；所述第三极耳距离所述第二极耳的长度为58～60mm；所述第四极耳距离所述第三极耳的长度为58～60mm；在卷绕后通过激光焊接将所有极耳连接到一起。
其中，在卷绕后，所述第一极耳、第二极耳、第三极耳和第四极耳分别位于圆柱状锂电芯中心的四周且呈中心对称分布。
其中，所述第一极耳、第二极耳、第三极耳和第四极耳分别朝向圆柱状锂电芯中心弯折，然后第一极耳和第三极耳在圆柱状锂电芯中心处再沿所述锂电芯的轴线向外弯折以使第一极耳和第三极耳抵触连接。
其中，所述正极片上设置有留白区，所述第一极耳、第二极耳、第三极耳和第四极耳分别通过对应的留白区连接到所述正极片上。
其中，所述留白区的宽度为10～12mm。
其中，所述正极片的宽度为57～58mm。
本发明提供的锂离子电池，其中的正极片设置四个极耳，在正极极片卷绕后，四个极耳靠近卷芯中心，可明显降低电芯内阻，可实现高倍率持续放电，瞬间放电高达40C；并且由于四个极耳靠近卷芯中心且分立于卷芯中心的四周呈中心对称分布，有利于极耳焊接，也更有利于电池安全性。
附图说明
图1是本发明实施例提供的锂电芯的结构示意图。
图2是本发明实施例提供的正极片的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行详细地描述，显然，所描述的实施例仅仅是本发明一部分实例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护范围。
参阅图1和图2，本实施例提供的一种圆柱形高倍率锂离子电池，其包括圆柱状的卷绕式锂电芯1，所述锂电芯1包括正极片10、负极片20以及设置于所述正极片10和负极片20之间的隔膜30，由正极片10、负极片20以及隔膜30层叠后卷绕形成。
其中，如图2所示的，所述正极片10上设置有第一极耳101、第二极耳102、第二极耳103和第四极耳104，所述第一极耳101距离正极片10一端部的长度L1设置在25～27mm之间，所述第二极耳102距离所述第一极耳101的长度L2设置在58～60mm之间，所述第三极耳103距离所述第二极耳102的长度L3设置在58～60mm之间，所述第四极耳104距离所述第三极耳103的长度L4设置 在58～60mm之间，在卷绕后通过激光焊接将所有极耳101、102、103、104连接到一起。所有极耳101、102、103、104的宽度均为4～6mm，所述正极片10的宽度D为57～58mm。更具体地，所述正极片10上设置有留白区105，所有极耳101、102、103、104均分别通过对应的留白区105连接到所述正极片10上；所述留白区105的宽度为10～12mm。
如图1所示的，在卷绕后，所述第一极耳101、第二极耳102、第二极耳103和第四极耳104分别位于圆柱状锂电芯1中心的四周且靠近圆柱状锂电芯1中心，四个极耳呈中心对称分布。具体地，第一极耳101、第二极耳102、第三极耳103和第四极耳104先分别朝向圆柱状锂电芯1中心弯折，然后第一极耳101和第三极耳103在圆柱状锂电芯1中心处再沿所述锂电芯1的轴线向外弯折。最后通过激光焊接将所有极耳连接在一起。
以上实施例提供的锂离子电池，其中的正极片设置四个极耳，在正极极片卷绕后，四个极耳靠近卷芯中心，可明显降低电芯内阻，可实现高倍率持续放电，瞬间放电高达40C；并且由于四个极耳靠近卷芯中心且分立于卷芯中心的四周呈中心对称分布，有利于极耳焊接，也更有利于电池安全性。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (6)

  1. 一种圆柱形高倍率锂离子电池，包括圆柱状的卷绕式锂电芯，所述锂电芯包括正极片、负极片以及设置于所述正极片和负极片之间的隔膜，其中，所述正极片上设置有第一极耳、第二极耳、第三极耳和第四极耳，所述极耳的宽度均为4～6mm，所述第一极耳距离正极片一端部的长度为25～27mm，所述第二极耳距离所述第一极耳的长度为58～60mm；所述第三极耳距离所述第二极耳的长度为58～60mm；所述第四极耳距离所述第三极耳的长度为58～60mm；在卷绕后通过激光焊接将所有极耳连接到一起。
  2. 根据权利要求1所述的圆柱形高倍率锂离子电池，其中，在卷绕后，所述第一极耳、第二极耳、第三极耳和第四极耳分别位于圆柱状锂电芯中心的四周且呈中心对称分布。
  3. 根据权利要求2所述的圆柱形高倍率锂离子电池，其中，所述第一极耳、第二极耳、第三极耳和第四极耳分别朝向圆柱状锂电芯中心弯折，然后第一极耳和第三极耳在圆柱状锂电芯中心处再沿所述锂电芯的轴线向外弯折以使第一极耳和第三极耳抵触连接。
  4. 根据权利要求3所述的圆柱形高倍率锂离子电池，其中，所述正极片上设置有留白区，所述第一极耳、第二极耳、第三极耳和第四极耳分别通过对应的留白区连接到所述正极片上。
  5. 根据权利要求4所述的圆柱形高倍率锂离子电池，其中，所述留白区的宽度为10～12mm。
  6. 根据权利要求4所述的圆柱形高倍率锂离子电池，其中，所述正极片的宽度为57～58mm。
PCT/CN2015/079832 2015-05-26 2015-05-26 一种圆柱形高倍率锂离子电池 WO2016187815A1 (zh)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112909344A (zh) * 2019-09-25 2021-06-04 荣耀终端有限公司 支持高功率快充的电池模组、充电模组和电子设备
CN114927834A (zh) * 2022-07-01 2022-08-19 齐鲁中科光物理与工程技术研究院 一种电池极片、电极芯和二次电池
CN115101899A (zh) * 2022-06-13 2022-09-23 肇庆小鹏汽车有限公司 裸电芯、裸电芯的制作方法和电芯结构
CN115579592A (zh) * 2022-11-10 2023-01-06 瑞浦兰钧能源股份有限公司 二次电池
CN115101899B (zh) * 2022-06-13 2024-05-28 肇庆小鹏汽车有限公司 裸电芯、裸电芯的制作方法和电芯结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201918464U (zh) * 2010-12-29 2011-08-03 宁波伊司达锂电池有限公司 高倍率圆柱型锂离子电池
CN202231085U (zh) * 2011-08-09 2012-05-23 杭州海孚新能源科技有限公司 圆柱形锂离子电池极耳结构
CN104577189A (zh) * 2014-12-23 2015-04-29 西宁共进新材料科技有限公司 一种圆柱形高倍率锂离子电池

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201918464U (zh) * 2010-12-29 2011-08-03 宁波伊司达锂电池有限公司 高倍率圆柱型锂离子电池
CN202231085U (zh) * 2011-08-09 2012-05-23 杭州海孚新能源科技有限公司 圆柱形锂离子电池极耳结构
CN104577189A (zh) * 2014-12-23 2015-04-29 西宁共进新材料科技有限公司 一种圆柱形高倍率锂离子电池

Cited By (8)

* Cited by examiner, † Cited by third party
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CN112909344A (zh) * 2019-09-25 2021-06-04 荣耀终端有限公司 支持高功率快充的电池模组、充电模组和电子设备
CN112909344B (zh) * 2019-09-25 2022-09-02 荣耀终端有限公司 支持高功率快充的电池模组、充电模组和电子设备
CN115101899A (zh) * 2022-06-13 2022-09-23 肇庆小鹏汽车有限公司 裸电芯、裸电芯的制作方法和电芯结构
CN115101899B (zh) * 2022-06-13 2024-05-28 肇庆小鹏汽车有限公司 裸电芯、裸电芯的制作方法和电芯结构
CN114927834A (zh) * 2022-07-01 2022-08-19 齐鲁中科光物理与工程技术研究院 一种电池极片、电极芯和二次电池
CN114927834B (zh) * 2022-07-01 2024-01-09 齐鲁中科光物理与工程技术研究院 一种电池极片、电极芯和二次电池
CN115579592A (zh) * 2022-11-10 2023-01-06 瑞浦兰钧能源股份有限公司 二次电池
CN115579592B (zh) * 2022-11-10 2023-04-25 瑞浦兰钧能源股份有限公司 二次电池

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