WO2014166142A1 - 锂电池结构 - Google Patents

锂电池结构 Download PDF

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Publication number
WO2014166142A1
WO2014166142A1 PCT/CN2013/075664 CN2013075664W WO2014166142A1 WO 2014166142 A1 WO2014166142 A1 WO 2014166142A1 CN 2013075664 W CN2013075664 W CN 2013075664W WO 2014166142 A1 WO2014166142 A1 WO 2014166142A1
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WO
WIPO (PCT)
Prior art keywords
negative electrode
positive electrode
positive
negative
lithium battery
Prior art date
Application number
PCT/CN2013/075664
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English (en)
French (fr)
Inventor
黄文弘
Original Assignee
东莞乔登节能科技有限公司
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Application filed by 东莞乔登节能科技有限公司 filed Critical 东莞乔登节能科技有限公司
Publication of WO2014166142A1 publication Critical patent/WO2014166142A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/531Electrode connections inside a battery casing
    • H01M50/538Connection of several leads or tabs of wound or folded electrode stacks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • H01M50/564Terminals characterised by their manufacturing process
    • H01M50/567Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the utility model relates to a lithium battery structure, in particular to an effect which can effectively improve the performance and ensure the safety of use.
  • the lithium battery currently used mainly comprises a casing, which is provided with an electrolyte solution and a lithium battery core, and the lithium battery core is continuously wound by a positive electrode sheet, a separator film and a negative electrode sheet, and the upper portion of the positive electrode sheet is directly Forming or welding a plurality of positive electrode tabs, a plurality of positive electrode tabs are directly welded to the bottom of the positive electrode terminal, and a plurality of negative electrode tabs are directly formed or welded on the upper surface of the negative electrode tab, and a plurality of negative electrode tabs are directly soldered to the negative electrode wiring of the housing At the bottom of the column, after the nut is screwed through the external thread of the positive terminal and the top of the negative terminal, respectively, different terminals can be fixed to output positive and negative electricity.
  • the positive electrode tab and the negative electrode tab of the above-mentioned winding core are respectively welded to the bottom of the positive and negative terminals, and the quality of the solder joint is difficult to control, and often is a point-like and one-sided contact, so that it is easy to cause conduction and heat dissipation. Bad problem.
  • the positive electrode or the negative electrode of the winding core will move downward and the positive electrode and the negative electrode tab will be deformed, so that there is a potential danger of causing a short circuit.
  • An object of the present invention is to provide a lithium battery structure by providing a positive electrode connecting piece and a negative electrode connecting piece which are respectively formed in a shape below the cover plate, so as to sandwich a plurality of positive electrode tabs and a plurality of negative electrode tabs respectively.
  • the structure is such that a plurality of positive electrode tabs and a plurality of negative electrode tabs can be stably connected, respectively, so that the electrical conductivity is good, the heat dissipation is fast, the internal resistance is small, and the assembly is convenient.
  • Another object of the present invention is to provide a lithium battery structure by providing a positioning member between the insulating sheet and the winding core, and pressing the two ends of the positioning member against the bottom end of the insulating sheet and the top end of the winding core.
  • the structure is such that the core can be effectively positioned to avoid short circuits to ensure safe use.
  • the lithium battery structure of the present invention comprises a casing, a positive electrode connection component, a negative electrode connection component, a positive electrode connection piece, a negative electrode connection piece and a winding core.
  • the housing includes a lower housing having an opening at the top end and a cover plate covering the top end of the lower housing to close the opening.
  • the positive terminal assembly and the negative terminal assembly are disposed on the cover plate; the positive connection piece is coupled to the cover plate Below the cover plate, the top end of the positive electrode tab is electrically connected to the positive electrode terminal assembly, and the bottom end of the positive electrode tab extends downwardly to the first positive electrode joint portion and the second positive electrode joint portion; the negative electrode tab is bonded under the cover plate, and the negative electrode
  • the top end of the connecting piece is electrically connected to the negative electrode connecting component, and the bottom end of the negative connecting piece extends downwardly to the first negative electrode bonding portion and the second negative electrode bonding portion; and the winding core is accommodated in the lower casing, and the top end of the winding core is disposed
  • the cover plate comprises a top plate and an insulating sheet, the top plate and the insulating sheet are superposed on each other, and the insulating sheet is sandwiched between the top plate and the positive and negative connecting pieces; and a positioning member is located between the insulating sheet and the winding core for supplying Press down and position the core.
  • the positioning member is U-shaped.
  • the present invention further includes a third positive electrode bonding portion, a fourth positive electrode bonding portion, a third negative electrode bonding portion, and a fourth negative electrode bonding portion, wherein the third and fourth positive electrode bonding portions are respectively connected by the positive electrode
  • the bottom end of the sheet extends downward, and the third and fourth positive electrode joints are located between the first and second positive electrode joint portions; and the third and fourth negative electrode joint portions respectively extend downward from the bottom end of the negative electrode connecting piece, and
  • the third and fourth negative electrode coupling portions are located between the first and second negative electrode coupling portions.
  • an explosion-proof hole is formed in the central portion of the cover.
  • the cover plates on both sides of the explosion-proof hole are respectively provided with rubber sleeves, and the hollow tubes on the bottom surface of each rubber sleeve protrude downwardly and pass through the top plate and the insulating sheet respectively, and the positive electrode and the negative electrode connection components are respectively placed on Above the two rubber sleeves, the top end of the positive electrode tab is fixedly connected to the cover plate and the positive electrode terminal assembly, and the top end of the negative electrode connecting piece, the cover plate and the negative electrode wiring assembly are fixedly connected.
  • the utility model has a plurality of positive electrode tabs and a plurality of negative electrode tabs respectively sandwiched between the positive electrode and the negative electrode connecting piece, so that several positive electrode tabs and several negative electrode tabs can be stably connected respectively.
  • the heat dissipation is fast, the internal resistance is small, and the assembly is convenient.
  • the utility model can position the winding core with the positioning member when the housing is upright, inverted or inclined, so that short circuit can be effectively avoided to ensure safe use.
  • 1 is an exploded view of the assembly of the preferred embodiment of the present invention.
  • FIGS. 2A-2B are perspective views of a combination of partial components of a preferred embodiment of the present invention.
  • FIG 3 is a perspective view of a combination of some components of a preferred embodiment of the present invention.
  • FIG. 4 is a perspective view of a front view of all components of the preferred embodiment of the present invention before assembly.
  • Lithium battery structure 1 housing 2 opening 21 lower housing 22
  • Second negative electrode bonding portion 62 third negative electrode bonding portion 63 fourth negative electrode bonding portion 64
  • Positioning member 8 Base plate 81 leg 82.
  • the lithium battery structure 1 of the present invention comprising a casing 2, a positive electrode terminal assembly 3, a negative electrode terminal assembly 4, a positive electrode connection piece 5, and a negative electrode.
  • the casing 2 is a hollow rectangular body including a lower casing 22 having an opening 21 at its top end and a cover plate 23 which is closed at the top end of the lower casing 22 to close the opening 21.
  • the cover plate 23 includes a top plate 24 and an insulating sheet 25.
  • the top plate 24 and the insulating sheet 25 are superposed on each other, and an explosion-proof hole 26 is formed in a central portion of the cover plate 23.
  • the cover plate 23 on both sides of the explosion-proof hole 26 is respectively provided with a rubber sleeve 27, and the hollow tube on the bottom surface of any of the rubber sleeves 27 protrudes downward and passes through the top plate 24 and the insulating sheet 25, respectively.
  • the positive electrode and the negative electrode terminal assembly (3, 4) are respectively placed above the two rubber sleeves 27, and the top end of the positive electrode connecting piece 5, the cover plate 23 and the positive electrode terminal assembly 3 are connected and fixed by riveting, and the negative electrode connecting piece 6 is connected.
  • the top end, the cover plate 23 and the negative electrode terminal assembly 4 are connected and fixed so that the insulating sheet 25 is interposed between the top plate 24 and the positive and negative connecting pieces (5, 6).
  • the positive connecting piece 5 is composed of two U-shaped pieces of different sizes, wherein the bottom ends of the larger pieces extend downwardly to form a first positive electrode bonding portion 51 and a second positive electrode bonding portion 52, and the smaller pieces are formed.
  • the bottom ends of the bodies respectively extend downward to form a third positive electrode bonding portion 53 and a fourth positive electrode bonding portion 54.
  • the fourth positive electrode bonding portion (53, 54) is located between the first and second positive electrode bonding portions (51, 52), and forms a gap between the first and third positive electrode bonding portions (51, 53). Another gap is formed between the second and fourth positive electrode joints (52, 54).
  • the negative connecting piece 6 is also composed of two U-shaped pieces of different sizes, and the bottom ends of the larger pieces extend downward to form a first negative electrode bonding portion 61 and a second negative electrode bonding portion 62, and a smaller piece.
  • the bottom ends of the body respectively extend downward to form a third negative electrode joint portion 63 and a fourth negative electrode joint portion 64.
  • the third and fourth portions are respectively
  • the negative electrode bonding portion (63, 64) is located between the first and second negative electrode bonding portions (61, 62), and a gap is formed between the first and third negative electrode bonding portions (61, 63), and in the second, Another gap is formed between the four negative electrode junctions (62, 64).
  • first, second, third, and fourth positive electrode bonding portions may also be directly extended downward from the bottom end of the positive electrode connecting piece 5
  • first, second, The third and fourth negative electrode bonding portions may also be directly extended downward from the bottom end of the negative electrode connecting piece 6, and may also be in the first and third positive electrode bonding portions (51, 53).
  • first and third negative electrode bonding portions may also be directly extended downward from the bottom end of the negative electrode connecting piece 6, and may also be in the first and third positive electrode bonding portions (51, 53).
  • a gap is formed between the two.
  • the core 7 is formed by laminating a positive electrode sheet, a separator, and a negative electrode sheet, and the core 7 is also formed by stacking a positive electrode sheet, a separator, and a negative electrode sheet in sequence.
  • the top end forms a plurality of positive electrode tabs 71 and a plurality of negative electrode tabs 72.
  • the plurality of negative electrode tabs 72 are respectively When sandwiched between the first and third negative electrode bonding portions (61, 63) and between the second and fourth negative electrode bonding portions (62, 64), respectively, ultrasonic welding is performed, so that the positive electrode connecting piece 5 can be obtained.
  • the positive electrode tabs 6 are firmly connected to the plurality of negative electrode tabs 72, and the negative electrode tabs 6 are firmly connected to the plurality of negative electrode tabs 72.
  • the structure of the positive electrode connecting piece 5 and the negative electrode connecting piece 6 is suitable for the use state in which the winding core 7 is provided with a plurality of sets of positive electrode tabs 71 and a plurality of sets of negative electrode tabs 72, and when the winding core 7 is only provided with a set of positive poles
  • the positive connecting piece 5 may also be provided with only the first and second positive electrode joints (51, 52), and the negative electrode connecting piece 6 is only provided with the first and second negative electrode combinations.
  • the positive electrode tab 5 can also be firmly connected to the plurality of positive electrode tabs 71, and the negative electrode tab 6 can be firmly connected to the plurality of negative electrode tabs 72.
  • the positioning member 8 is located between the insulating sheet 25 and the winding core 7.
  • the positioning member 8 is substantially U-shaped, and includes a bottom plate 81 and legs 82 extending upward from opposite sides of the bottom plate 81, wherein The bottom plate 81 is pressed downward against the top end of the winding core 7, and each leg 82 is pressed upward against the bottom end of the cover plate 23, specifically against the bottom end of the insulating sheet 25.
  • the core can be prevented by the support of the positioning member 8.
  • the positive electrode tab or the negative electrode tab of 7 is moved, and the positive electrode tab 5, the positive electrode tab 71, the negative electrode tab 6 and the negative electrode tab 72 are prevented from being deformed, thereby avoiding the risk of causing a short circuit.
  • the utility model has a plurality of positive electrode tabs and a plurality of negative electrode tabs respectively sandwiched between the positive electrode and the negative electrode connecting piece, so that several positive electrode tabs and several negative electrode tabs can be stably connected respectively.
  • the heat dissipation is fast, the internal resistance is small, and the assembly is convenient.
  • the utility model can position the winding core with the positioning member when the housing is upright, inverted or inclined, so that short circuit can be effectively avoided to ensure safe use.
  • the present invention can achieve the intended purpose, and provides a lithium battery which can not only stabilize the structure, prevent short circuit to ensure safe use, and can effectively improve the conduction and heat dissipation effects.
  • the structure is of great value for industrial use, and a new type of patent application is filed according to law.

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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)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

一种锂电池结构,包括一壳体,壳体的盖板上设有正极接线组件及负极接线组件,盖板的下方设有正极连接片及负极连接片,正极连接片与正极接线组件呈电连接,负极连接片与负极接线组件呈电连接,且正极连接片的底端向下延伸一第一正极结合部及一第二正极结合部,负极连接片的底端向下延伸第一负极结合部及一第二负极结合部,而一卷芯容置于壳体内,卷芯顶端的数个正极极耳夹置并结合于第一、第二正极结合部之间,数个负极极耳夹置并结合于第一、第二负极结合部之间。借此,即可将数个正极极耳及数个负极极耳稳固定位。

Description

锂电池结构 技术领域
本实用新型有关于一种锂电池结构,尤指一种能有效提高效能,并确保使用安全。
背景技术
目前所使用的锂电池,主要包括一壳体,壳体内置放有电解质溶液及锂电池卷芯,锂电池卷芯由正极片、隔离膜及负极片连续卷绕而成,正极片的上方直接形成或焊接数个正极极耳,数个正极极耳直接焊接在正极接线柱的底部,负极片的上方直接形成或焊接数个负极极耳,数个负极极耳直接焊接在壳体的负极接线柱的底部,而通过正极接线柱及负极接线柱顶部的外螺纹分别螺合一螺母后,即可分别固定不同的接线端子,以输出正、负电。
技术问题
但是,上述卷芯的正极极耳及负极极耳分别焊接于正、负极接线柱的底部,由于焊接点的质量不易控制,且常为点状及单侧的接触,因此,容易造成导电及散热不良的问题。再者,当锂电池倒置时,由于卷芯的正极片或负极片会有向下移动及让正极、负极极耳变形的问题,如此一来,将会有造成短路的潜在危险。
技术解决方案
有鉴于此,为了提供一种有别于现有锂电池的锂电池结构,以改进上述的缺点,并达到下列的目的,发明人积多年的经验及不断的研发改进,遂有本实用新型的产生。
本实用新型的一个目的在于提供一种锂电池结构,借助在盖板的下方设有分别呈ㄇ形的正极连接片及负极连接片,以分别夹置数个正极极耳及数个负极极耳的结构,以便能分别稳固连接数个正极极耳及数个负极极耳,以使导电佳、散热快、内阻小,并使方便组装。
本实用新型的另一个目的在于提供一种锂电池结构,借助在绝缘片与卷芯之间设有定位件,并以定位件的两端分别抵压绝缘片的底端及与卷芯的顶端的结构,以便能有效定位卷芯,避免造成短路,以确保使用安全。
为达上述发明目的,本实用新型所设的锂电池结构包括一壳体、一正极接线组件、一负极接线组件、一正极连接片、一负极连接片以及一卷芯。其中,该壳体包括一顶端具有开口的下壳体及一盖合于下壳体顶端以封闭开口的盖板,该正极接线组件及负极接线组件设于盖板上;该正极连接片结合于盖板下方,正极连接片的顶端与正极接线组件呈电性连接,正极连接片的底端向下延伸第一正极结合部及第二正极结合部;该负极连接片结合于盖板下方,负极连接片的顶端与负极接线组件呈电性连接,负极连接片的底端向下延伸第一负极结合部及第二负极结合部;而该卷芯容置于下壳体内,卷芯的顶端设有数个正极极耳及数个负极极耳,该等正极极耳夹置并结合于第一、第二正极结合部之间,该等负极极耳夹置并结合于第一、第二负极结合部之间。
实施时,盖板包括顶板及绝缘片,顶板及绝缘片上、下叠合,且绝缘片夹置于顶板与正、负极连接片之间;而一定位件位于绝缘片与卷芯之间,供向下抵压并定位卷芯。
实施时,该定位件呈U形。
实施时,本实用新型更包括一第三正极结合部、一第四正极结合部、一第三负极结合部及一第四负极结合部,其中,第三、第四正极结合部分别由正极连接片的底端向下延伸,第三、第四正极结合部位于第一、第二正极结合部之间;而第三、第四负极结合部分别由负极连接片的底端向下延伸,且第三、第四负极结合部位于第一、第二负极结合部之间。
实施时,盖板的中央部位形成一防爆孔。
实施时,位于防爆孔两侧的盖板上分别设有胶套,各胶套底面的中空管向下凸出,并分别穿过顶板及绝缘片,该正极、负极接线组件分别置放于两个胶套的上方,该正极连接片顶端与盖板及正极接线组件连接固定,该负极连接片的顶端、盖板及负极接线组件连接固定。
有益效果
1、本实用新型是将数个正极极耳及数个负极极耳分别夹置于ㄇ形的正极、负极连接片之中,因此,可分别稳固连接数个正极极耳及数个负极极耳,以使导电佳、散热快、内阻小,并可方便组装。
2、本实用新型能在壳体直立、倒置或倾斜放置时,以定位件定位卷芯,因此,能有效避免造成短路,以确保使用安全。
为便于对本实用新型能有更深入的了解,兹详述于后。
附图说明
图1为本实用新型较佳实施例的组件分解图。
图2A-图2B为本实用新型较佳实施例的部份组件组合后的立体外观图。
图3为本实用新型较佳实施例的部份组件组合后的立体外观图。
图4为本实用新型较佳实施例的所有组件完成组装前的立体外观图。
【符号说明】
锂电池结构1 壳体2 开口21 下壳体22
盖板23 顶板24 绝缘片25 防爆孔26
胶套27 正极接线组件3 负极接线组件4 正极连接片5
第一正极结合部51 第二正极结合部52 第三正极结合部53
第四正极结合部54 负极连接片6 第一负极结合部61
第二负极结合部62 第三负极结合部63 第四负极结合部64
卷芯7 正极极耳71 负极极耳72
定位件8 底板81 支脚82。
本发明的最佳实施方式
请参阅图1~3所示,其为本实用新型锂电池结构1的较佳实施例,包括一壳体2、一正极接线组件3、一负极接线组件4、一正极连接片5、一负极连接片6、一卷芯7以及一定位件8。
该壳体2为中空的长方形体,包括一顶端具有开口21的下壳体22及一盖合在下壳体22顶端以封闭该开口21的盖板23。该盖板23包括一顶板24及一绝缘片25,顶板24及绝缘片25上、下叠合,盖板23的中央部位形成一防爆孔26。位于防爆孔26两侧的盖板23上分别设有胶套27,任一胶套27底面的中空管向下凸出,并分别穿过顶板24及绝缘片25。
该正极、负极接线组件(3、4)分别置放于两个胶套27的上方,通过铆接方式将正极连接片5的顶端、盖板23及正极接线组件3连接固定,将负极连接片6的顶端、盖板23及负极接线组件4连接固定,使绝缘片25夹置于顶板24与正、负极连接片(5、6)之间。
该正极连接片5由两块大小不同的U形片体所组成,其中较大片体的底端分别向下延伸以形成一第一正极结合部51及一第二正极结合部52,较小片体的底端分别向下延伸以形成一第三正极结合部53及一第四正极结合部54,当两块U形片体层叠,并同时铆接于盖板23上时,即可让第三、第四正极结合部(53、54)位于第一、第二正极结合部(51、52)之间,并在第一、第三正极结合部(51、53)之间形成一个间隙,在第二、第四正极结合部(52、54)之间形成另一个间隙。
该负极连接片6同样由两块大小不同的U形片体所组成,较大片体的底端分别向下延伸以形成一第一负极结合部61及一第二负极结合部62,较小片体的底端分别向下延伸以形成一第三负极结合部63及一第四负极结合部64,当两块U形片体层叠,并同时铆接于盖板23上时,第三、第四负极结合部(63、64)位于第一、第二负极结合部(61、62)之间,第一、第三负极结合部(61、63)之间形成一个间隙,而在第二、第四负极结合部(62、64)之间形成另一个间隙。
实施时,第一、第二、第三、第四正极结合部(51、52、53、54)亦可直接由正极连接片5的底端向下平行延伸而成,第一、第二、第三、第四负极结合部(61、62、63、64)亦可直接由负极连接片6的底端向下平行延伸而成,同样可以在第一、第三正极结合部(51、53)之间、第二、第四正极结合部(52、54)之间、第一、第三负极结合部(61、63)之间及第二、第四负极结合部(62、64)之间分别形成一个间隙。
该卷芯7为正极片、隔离膜及负极片层叠之后连续卷绕而成,实施时,该卷芯7也可为正极片、隔离膜及负极片依序堆栈而成,借以在卷芯7的顶端形成数个正极极耳71及数个负极极耳72。当数个正极极耳71分别夹置于第一、第三正极结合部(51、53)之间及第二、第四正极结合部(52、54)之间,数个负极极耳72分别夹置于第一、第三负极结合部(61、63)之间及第二、第四负极结合部(62、64)之间时,分别以超音波进行焊接,即可让正极连接片5与数个正极极耳71稳固连接,让负极连接片6与数个负极极耳72稳固连接。
实施时,上述正极连接片5及负极连接片6的结构适用于卷芯7设有多组正极极耳71及多组负极极耳72的使用状态,而当卷芯7仅设有一组正极极耳71及一组负极极耳72时,该正极连接片5亦可仅设有第一、第二正极结合部(51、52),该负极连接片6仅设有第一、第二负极结合部(61、62),同样可以让正极连接片5与数个正极极耳71稳固连接,让负极连接片6与数个负极极耳72稳固连接。
而如图1、4所示,该定位件8位于绝缘片25与卷芯7之间,定位件8概略呈U形,包括一底板81及由底板81两侧分别向上延伸的支脚82,其中,底板81向下抵压于卷芯7的顶端,各支脚82向上抵压于盖板23的底端,具体是抵压于绝缘片25底端。借此,当正极连接片5、负极连接片6、卷芯7以及定位件8封装于壳体2内部,且壳体2倒置或倾斜放置时,借助定位件8的支撑,即可防止卷芯7的正极片或负极片移动,并防止正极连接片5、正极极耳71、负极连接片6及负极极耳72变形,从而避免造成短路的危险。
因此,本实用新型具有以下的优点:
1、本实用新型是将数个正极极耳及数个负极极耳分别夹置于ㄇ形的正极、负极连接片之中,因此,可分别稳固连接数个正极极耳及数个负极极耳,以使导电佳、散热快、内阻小,并可方便组装。
2、本实用新型能在壳体直立、倒置或倾斜放置时,以定位件定位卷芯,因此,能有效避免造成短路,以确保使用安全。
综上所述,依上文所揭示的内容,本实用新型确可达到预期的目的,提供一种不仅能让结构稳定、防止短路以确保使用安全,且可有效提升导电及散热效果的锂电池结构,极具产业上利用的价值,爰依法提出新型专利申请。

Claims (8)

  1. 一种锂电池结构,其特征包括:
    一壳体,包括一顶端具有开口的下壳体及一盖合于下壳体顶端以封闭该开口的盖板,该盖板上设有一正极接线组件及一负极接线组件;
    一正极连接片,结合于盖板下方,该正极连接片的顶端与正极接线组件呈电性连接,正极连接片的底端向下延伸一第一正极结合部及一第二正极结合部;
    一负极连接片,结合于盖板下方,该负极连接片的顶端与负极接线组件呈电性连接,负极连接片的底端向下延伸一第一负极结合部及一第二负极结合部;以及
    一卷芯,容置于下壳体内,该卷芯的顶端设有数个正极极耳及数个负极极耳,该等正极极耳夹置并结合于第一、第二正极结合部之间,该等负极极耳夹置并结合于第一、第二负极结合部之间。
  2. 如权利要求1所述的锂电池结构,其特征在于,该盖板包括一顶板及一绝缘片,该顶板及该绝缘片上、下叠合,且该绝缘片夹置于顶板与正、负极连接片之间。
  3. 如权利要求2所述的锂电池结构,其特征在于,更包括一定位件,该定位件位于该绝缘片与卷芯之间,供向下抵压并定位卷芯。
  4. 如权利要求3项所述的锂电池结构,其特征在于,该定位件呈U形。
  5. 如权利要求1、2、3或4所述的锂电池结构,其特征在于,更包括一第三正极结合部及一第四正极结合部,该第三、第四正极结合部分别由正极连接片的底端向下延伸,且第三、第四正极结合部位于第一、第二正极结合部之间。
  6. 如权利要求1、2、3或4所述的锂电池结构,其特征在于,更包括一第三负极结合部及一第四负极结合部,该第三、第四负极结合部分别由负极连接片的底端向下延伸,且第三、第四负极结合部位于第一、第二负极结合部之间。
  7. 如权利要求2所述的锂电池结构,其特征在于,盖板的中央部位形成一防爆孔。
  8. 如权利要求7所述的锂电池结构,其特征在于,位于防爆孔两侧的盖板上分别设有胶套,各胶套底面的中空管向下凸出,并分别穿过顶板及绝缘片,该正极、负极接线组件分别置放于两个胶套的上方,该正极连接片顶端与盖板及正极接线组件连接固定,该负极连接片的顶端、盖板及负极接线组件连接固定。
PCT/CN2013/075664 2013-04-09 2013-05-15 锂电池结构 WO2014166142A1 (zh)

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