WO2012075626A1 - 锂电池的电极结构 - Google Patents

锂电池的电极结构 Download PDF

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Publication number
WO2012075626A1
WO2012075626A1 PCT/CN2010/079544 CN2010079544W WO2012075626A1 WO 2012075626 A1 WO2012075626 A1 WO 2012075626A1 CN 2010079544 W CN2010079544 W CN 2010079544W WO 2012075626 A1 WO2012075626 A1 WO 2012075626A1
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WIPO (PCT)
Prior art keywords
electrode
cover body
lithium battery
electrode structure
battery
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PCT/CN2010/079544
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English (en)
French (fr)
Inventor
张惇育
张惇杰
林廷铿
Original Assignee
长园科技实业股份有限公司
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Application filed by 长园科技实业股份有限公司 filed Critical 长园科技实业股份有限公司
Priority to DE112010006062.2T priority Critical patent/DE112010006062B4/de
Priority to CN201080067101.0A priority patent/CN102986061B/zh
Priority to GB1221764.2A priority patent/GB2501568B/en
Priority to PCT/CN2010/079544 priority patent/WO2012075626A1/zh
Priority to JP2013518932A priority patent/JP5591402B2/ja
Publication of WO2012075626A1 publication Critical patent/WO2012075626A1/zh

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Classifications

    • 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
    • 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
    • H01M50/543—Terminals
    • 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
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • 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

  • the present invention relates to an electrode structure of a lithium battery, and particularly to a conductive electrode structure of a lithium battery through a coating and a non-direct penetration manner, to achieve a sealing effect at the conductive portion of the electrode.
  • the battery tank of the foregoing secondary lithium battery is usually a metal can made of aluminum.
  • the metal can is made of aluminum or stainless steel and has a cylindrical or square shape with at least one end open, and the positive electrode, the negative electrode and the separator are sealed in the metal can.
  • the existing lithium battery electrode is provided with an electrode terminal electrically connected to the cover plate, and is separated by an insulating sheet, and penetrates the cover plate, the positive electrode terminal and the insulating sheet through the rivet.
  • the positive terminal is fastened to the cover plate; the insulating sheet is further disposed to insulate the rivet and the cover plate under the cover plate, and the electrode joint is welded to the lower end of the rivet, and the positive electrode connector and the positive electrode of the battery in the metal can (or the negative electrode) ) connected.
  • the cylindrical battery is electrically connected to the conductive end of the cover plate by integral molding or welding, and the external discharge is applied.
  • the sealing effect can be achieved through the insulating sheet, when the rubber sheet is used for a long time, the rubber insulating sheet will have a gap due to aging, and the through hole will not In the sealed state, water vapor will enter the inside of the battery can from here to reduce the service life of the battery.
  • the external electrode of the steel material when two lithium batteries are connected in series or in parallel through the electrical connection component, if the electrical connection component is also a steel material, such as an electric bicycle, an electric wheelchair, etc.
  • the through hole is not sealed, and the water vapor will enter the inside of the battery can from here to reduce the service life of the battery.
  • the cross-sectional area of the part (rivet or bolt (conductive terminal)) penetrating the cover plate and the external contact point is not large.
  • This structural principle is such that a wide road is not in a certain section. Proportion of bridges, so the more cars that pass through the bridge, the easier it is to generate traffic jams at the entrance to the bridge.
  • heat is generated due to the impedance of the portion of the cover plate, so that the temperature is increased during charging, and the temperature rise effect is a vicious cycle that further increases the impedance, and the safety is used. Not good.
  • the resistance of the electrode is increased, and the efficiency of charge and discharge is naturally lowered.
  • the existing electrode structure in the penetrating manner requires an insulating sheet or the like to be sealed through the cover plate, and the manufacturing difficulty and cost are high to achieve the sealing standard.
  • the present invention provides an electrode structure of a lithium battery, which forms a conductive electrode structure of a lithium battery through a non-direct penetration manner, and water and gas are less likely to enter the inside of the battery metal can, and easily reach the conductive portion of the electrode. Sealing standards.
  • Another object of the present invention is to design the electrode structure through the elastic contact. When used in a high-vibration environment, the electrode will not be easily deformed and deformed at the outlet of the cover body, thereby increasing the service life of the battery.
  • Another object of the present invention is that the external contact area of the electrode is increased, which is suitable for application to a large amount of current, reducing the influence of the resistance of the electrode, increasing the safety of application of a large current, and increasing the efficiency of charge and discharge of the lithium battery.
  • the sealing structure of the cylindrical electrode and the cover plate, the structural unit, and the manufacturing difficulty and cost of achieving the sealing standard are lower than those of the prior art.
  • the present invention discloses an electrode structure of a lithium battery, and an electrode structure for electrically connecting the positive electrode and the negative electrode of the battery in the can of the lithium battery, comprising: a cover body, the cover body is insulated and waterproof The material is formed by an injection molding method; and an electrode body of at least one metal material is required, and the middle portion of the electrode body is a covered portion, and the covered portion is disposed in the cover body, and the package is provided Forming a first bent portion at one end of the covering portion, the first bent portion extending to form a connecting portion exposed by the lower surface of the cover body, and electrically connecting with the positive electrode (or the negative electrode) of the battery in the can body; The other end of the portion forms a second bent portion, and the second bent portion extends to form an output portion exposed by the upper surface of the cover body for conducting externally.
  • the output portion forms a third bent portion, and the third bent portion extends to form a contact portion.
  • the upper surface of the cover body is provided with at least one fixing component, and the fixing component is disposed in a non-contact state or a contact state with the covered portion of the electrode body.
  • An advantage of the present invention is that the covered portion of the electrode body and the first and second bent portions are formed inside the cover body.
  • the bent portion also causes the electrode body to be on the cover plate.
  • the upper and lower exposed forms that are not directly penetrated are formed, and the bent type is used to extend the water-gas stroke infiltrated by the joints, and block the inside of the lithium battery can body due to capillary phenomenon.
  • the contact portion formed by the extension of the third bent portion can form a large contact area, and when a large amount of electric charge is driven by the voltage and passes through the electrode, the resistance of the electrode is lowered, and the efficiency of charging and discharging is improved.
  • Figure 1 is a perspective view of an embodiment of the present invention.
  • Figure 2 is a schematic cross-sectional view showing an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another application according to an embodiment of the present invention.
  • Figure 4 is a perspective view of a second embodiment of the present invention.
  • Figure 5 is a cross-sectional view showing a second embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another application of the third embodiment of the present invention.
  • connection part 230, 630 output part
  • FIG. 1 and 2 are schematic perspective views of a first embodiment of the present invention.
  • the positive electrode and the negative electrode of the battery body 300 of the lithium battery need to be electrically connected externally.
  • the square lithium battery has a two-piece metal electrode body on the cover body 100. 200, respectively, for electrically connecting the positive electrode and the negative electrode (not shown) of the battery in the tank 300, and the middle portion of each of the electrode bodies 200 is a covered portion 210, and the covered portion 210 is disposed on the cover body A first bent portion 201 is formed in the end of the covered portion 210.
  • the first bent portion 201 extends to form a connecting portion 220 exposed from the lower surface 101 of the cover body 100, so that the connecting portion 220 is formed.
  • the positive electrode of the battery 300 and the inner body (or negative electrode) is electrically connected; and the coated portion 210 and the other end 230 forming an output section 202, the second bent portion 202 is formed a second extending portion bent
  • the upper surface 102 of the cover body 100 is exposed, and the output portion 230 is used for external conduction.
  • the output portion 230 is formed with a third bent portion 203 extending from the third bent portion 203 to form a contact portion 240 for contact application when electrically connected.
  • the cover body 100 is formed by injection molding in an insulating and waterproof material, and can be formed by any known materials and methods, for example, injection molding using a plastic material.
  • any known method may be employed, such as providing a metal piece in the cover body 100 to increase the physics.
  • the strength and light resistance, or the light-shielding material is attached or applied to the cover body 100.
  • the electrode body 200 can be made of any known conductive metal material, such as a commonly used metal material such as copper or aluminum.
  • the covered portion 210 of the electrode body 200 and the first and second bent portions 201 and 202 are formed on the cover body 100.
  • the first and second bending portions 201 and 202 also cause the electrode body 200 to form an upper and lower exposed type on the cover body 100 that is not directly penetrated.
  • the two bent portions 201 and 202 can also extend the water-gas stroke infiltrated by the exposed joints, and block the moisture from entering the inside of the lithium battery can 300 due to the capillary phenomenon.
  • the contact portion 240 formed by the extension of the third bent portion 203 can form a large contact area, and when a large amount of electric charge is driven by the voltage and passes through the electrode body 200, the electrode body 200 can be lowered.
  • the resistance of the external contact surface improves the efficiency of charge and discharge.
  • the third bending portion 203 is also formed by the sheet metal material.
  • the third bending portion 203 is used as a supporting point by the original elastic effect of the sheet metal, so that the contact portion 240 is externally
  • the connection portion 240 has an upper and lower buffering effect, and the contact portion 240 forms an external contact point with a shockproof effect, which reduces the damage caused by the relative stress of the conventional steel material to the electrode and increases the service life of the lithium battery.
  • the upper surface 102 of the cover body 100 may be provided with a fixing component 400.
  • the sealing portion 401 of the fixing component 400 can be covered in the cover body 100 when the cover body 100 is formed, and the fixing portion 402 is exposed from the upper surface 102 of the cover body 100 to facilitate the connection.
  • the connection is fixed through the fixing portion 402.
  • the fixing component 400 can be formed under the contact portion 240, and according to the thickness factor of the cover body 100, the sealing portion 401 and the covered portion 210 of the fixing component 400 can be manufactured inside the cover body 100. Contact state or contact state.
  • the fixing component 400 is no longer directly connected to the electrode as in the prior art.
  • the fixing between the electrode body 200 and the cover body 100 will not be broken due to the connection fixing factor. Connection relationship.
  • FIG. 4 and FIG. 5 are schematic perspective views of a second embodiment of the present invention.
  • the present invention is applied to a cylindrical lithium battery as an illustrative example.
  • the electrodes of the cylindrical lithium battery are electrically conductive at both ends, so that the cover body 500 has a piece of metal electrode body 600 for electrically connecting the can.
  • the positive electrode or the negative electrode of the battery 700 (not shown), the middle portion of the electrode body 600 is a covered portion 610, the covered portion 610 is disposed in the cover body 500, and both ends of the covered portion 610
  • the first and second bent portions 601 and 602 are respectively formed, and the first bent portion 601 is extended to form the connecting portion 620 exposed by the lower surface 501 of the cover body 500, and is electrically connected to the positive (or negative) battery of the battery in the can 700.
  • the second bent portion 602 extends to form an output portion 630 which is exposed by the upper surface 502 of the cover body 700 for external conduction; and the output portion 630-end forms a third bent portion 603.
  • the three bent portions 603 extend to form the contact portion 640 for contact application when electrically connected.
  • the cover body 500 is formed by an injection molding method using an insulating waterproof material, and any known materials and methods can be employed. In order to prevent light from transmitting, any known method may be employed, such as providing a metal sheet in the cover body 500 to increase physical strength and light resistance, or in the cover.
  • the body 500 is attached or coated with a light-proof material.
  • the electrode body 600 is also the same as that described in the first embodiment, and any known conductive metal material such as a commonly used metal such as copper or aluminum may be used.
  • the upper surface 502 of the cover body 500 may also be provided with a fixing component 800.
  • the sealing portion 801 of the assembly 800 is wrapped in the cover body 500, and the fixing portion 802 is exposed from the upper surface 502 of the cover body 500, and the sealing portion 801 and the inside of the cover body 500 are manufactured.
  • the covering portion 610 may be in a non-contact state or a contact state.
  • the generally cylindrical lithium battery is disposed at the center of the upper surface 502 of the cover body 500, and is formed under the contact portion 640 for convenient connection of a series or parallel cylindrical lithium battery.

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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)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Description

锂电池的电极结构
技术领域 本发明涉及锂电池的电极结构， 尤指透过包覆与非直接贯穿的方式， 形成 锂电池的导电电极结构， 达到电极导电处的密封效果。
背景技术
锂电池由于材料技术的大幅突破， 已可作为高电量需求的供电源 (如： 磷 酸铁锂二次电池)， 例如使用于电动自行车、 电动轮椅等高电力需求的设备， 此种高容量的非水电解液二次锂电池其储电量及供电量均较传统锂电池大。前 述二次锂电池其电池罐通常为铝制的金属罐， 一般而言，金属罐是由铝或不锈 钢制成至少一端开口的圆柱形或方形，待电池正极、 负极及隔离膜封装于金属 罐后， 为了保持电池内部的长期稳定密封， 在电池罐的开口部位， 会以盖板透 过不同的密封技术而将其确实封闭， 以确保电池具有良好防水防气性能。
现有方型的锂电池电极是将对外电性连接的电极端子设置于盖板上，且二 者之间用绝缘片隔开， 且透过铆釘穿透该盖板、 正极端子及绝缘片， 以将正极 端子紧固于盖板上； 另设置绝缘片于盖板下方绝缘该铆釘与盖板， 而电极接头 焊接于该铆釘的下端， 该正极接头与金属罐内的电池的正极 (或负极)相连。
而圆柱形电池是由一体成型或焊接所构成的导电柄与贯穿盖板的导电端 子的电性连结， 完成对外放电的应用。
值得注意的是，目前锂电池连接金属罐内部电池至盖板外的电极结构设计 上都是贯穿盖板的方式， 且由钢性的铆釘或螺栓 (导电端子)做为对外的电极。 这种贯穿盖板与使用钢性材料将会有以下缺失：
1. 以贯穿方式的电极结构， 虽然透过绝缘片可以达到该处密封的效果， 但当长时间使用后，一般使用橡胶的绝缘片将会因为老化而产生间隙， 此时贯 穿孔处将不再是密封状态， 水气将会由此处进入电池金属罐内部， 降低电池的 使用寿命。
2. 钢性材料的对外电极， 当二个比上的锂电池透过电性连接组件相串联 或并联时， 如果电性连接组件也为钢性材料， 在如电动自行车、 电动轮椅等高 使贯穿孔处不是密封状态， 水气将会由此处进入电池金属罐内部， 降低电池的 使用寿命。
3. 以贯穿方式的电极结构其贯穿盖板的部分 (铆釘或螺栓 (导电端子))与对 外的接触点截面积不大，这种结构原理乃如一条宽广的大马路在某一段为一条 不成比例的桥梁，故要通过桥梁的车子愈多时，在桥梁的入口愈容易产生塞车。 同理， 当大量电子要通过电极时， 会因贯穿盖板部分的阻抗而产生热能， 因此 在充电时会增加温度， 而温升效应乃进一步导致阻抗再予增加的恶性循环，使 用安全性会不佳。 再者， 当大量电荷受电压驱使且通过电极时， 该电极的电阻 提高， 充放电的效率自然降低。
4. 现有以贯穿方式的电极结构其贯穿盖板需装设绝缘片等用以密封的组 件， 要达到密封标准其制造难度与成本都相当高。
发明内容
为解决上述的缺点， 本发明提供一种锂电池的电极结构， 透过非直接贯穿 的方式， 形成锂电池的导电电极结构， 水气不易处进入电池金属罐内部， 轻易 的达到电极导电处的密封标准。
本发明的另一目的，透过弹性接触的电极结构设计， 当在高震荡环境使用 时， 电极在盖体的导出处将不易被破坏而变形， 增加电池的使用寿命。
本发明的另一目的， 电极对外的接触面积增大， 适合应用于大量电流， 降 低电极的电阻影响， 增加大电流应用的安全性， 增加锂电池充放电的效率。
本发明的再一目的， 筒化电极及盖板的密封结构， 结构筒单， 达到密封标 准的制造难度与成本都比现有技术低。
为达上述的目的， 本发明揭露一种锂电池的电极结构，将锂电池的罐体内 电池正极、 负极对外电性连接的电极结构， 其包括:一盖板本体， 该盖板本体 利用绝缘防水材以射出成型方式一体制设成型；及依需至少一金属材质的电极 本体， 该电极本体中间段为一被包覆部， 该被包覆部设置于该盖板本体内， 且 该被包覆部一端形成一第一弯折部，该第一弯折部延伸形成一连接部由该盖板 本体下表面露出， 与罐体内电池的正极 (或负极)电性连接； 而该被包覆部另一 端形成一第二弯折部，该第二弯折部延伸形成一输出部由该盖板本体上表面露 出， 用以对外导电。 其中， 该输出部形成一第三弯折部， 由该第三弯折部延伸形成一接触部。 其中， 该盖板本体的上表面设有至少一固定组件， 该固定组件在设置上可 与该电极本体的被包覆部成非接触状态或接触状态。
本发明的优点在于， 电极本体的被包覆部与第一、二弯折部形成于该盖板 本体内部， 除了包覆所形成的密封效果， 弯折部也使的电极本体在盖板上形成 非直接贯穿的上下外露型态，透过弯折型态用以延长万一由接缝处渗入的水气 行程， 阻隔因毛细现象而进入锂电池罐体内部。 且因为电极本体为片状， 透过 第三弯折部延伸形成的接触部， 除了对外可形成大接点面积， 当大量电荷受电 压驱使且通过电极时， 降低电极的电阻， 提高充放电的效率， 也因为第三弯折 部而形成一防震效果，减少习知因为钢性材料的相对应力使的电极在盖板上所 产生的破坏变形， 增加锂电池的使用寿命。有因为不同于习知以贯穿方式的电 极结构， 筒化电极及盖板的密封结构， 所以不需要多余的密封组件就可以达到 密封的标准， 制造难度与成本都比现有揭露技术低。
附图说明 图 1为本发明 一实施例的立体示意图。
图 2为本发明 一实施例的剖面示意图。
图 3为本发明 一实施例的另一应用示意图
图 4为本发明 二实施例的立体示意图。
图 5为本发明 二实施例的剖面示意图。
图 6为本发明 三实施例的另一应用示意图
符号说明
100、 500: 盖板本体 101、 501 : 下表面
102、 502: 上表面 200、 600: 电极本体
201、 601 : 第一弯折部 202、 602: 第二弯折部 203、 603: 第三弯折部 210、 610: 被包覆部
220、 620: 连接部 230、 630: 输出部
240、 640: 接触部 300、 700: 罐体 400、 800: 固定组件 401、 801 : 封接部
402、 802: 固定部
具体实施方式 有关本发明的详细内容及技术说明，现以实施例来作进一步说明，但应了 解的是， 该等实施例仅为例示说明之用， 而不应被解释为本发明实施的限制。
请参阅图 1与图 2, 为本发明第一实施例的立体与剖面示意图。 以方型的 锂电池为说明例， 需将锂电池的罐体 300内电池正极、 负极对外电性连接， 一 般方型锂电池于该盖板本体 100上会有二片状金属材质的电极本体 200, 分别 用以电性连接罐体 300内电池正极、 负极 (图中未示）， 每一个电极本体 200中 间段为一被包覆部 210, 该被包覆部 210设置于该盖板本体 100内， 且该被包 覆部 210—端形成一第一弯折部 201 ,该第一弯折部 201延伸形成一连接部 220 由该盖板本体 100下表面 101露出，使该连接部 220与罐体 300内电池的正极 (或负极)电性连接； 而该被包覆部 210另一端形成一第二弯折部 202, 该第二 弯折部 202延伸形成一输出部 230由该盖板本体 100上表面 102露出，藉由该 输出部 230用以对外导电。 进一步该输出部 230—端形成一第三弯折部 203 , 由该第三弯折部 203延伸形成一接触部 240用于对外电性连接时的接触应用。
实施上， 该盖板本体 100 是利用绝缘防水材以射出成型方式一体制设成 型， 是可采用任何已知的材料与方法， 例如使用塑料材料射出成型方式形成。
实施上， 为了预防光线透过该盖板本体 100照设罐体 300内部，破坏罐体 300内部的化学材料， 是可采用任何已知方法， 如在该盖板本体 100内设置金 属片增加物理强度与防光， 或在该盖板本体 100贴附或涂抹防光材料。
电极本体 200可采用任何已知的导电金属材质， 例如常用的铜、铝等金属 材质， 电极本体 200的被包覆部 210与第一、二弯折部 201与 202形成于该盖 板本体 100 内部， 实施上除了包覆所形成的密封效果， 第一、 二弯折部 201 与 202也使得该电极本体 200在盖板本体 100上形成非直接贯穿的上下外露型 态，透过第一、二弯折部 201与 202也可以延长万一由外露的接缝处渗入的水 气行程， 阻隔水气因毛细现象而进入锂电池罐体 300内部。
又， 透过第三弯折部 203延伸形成的接触部 240, 除了对外可形成大的接 点面积， 当大量电荷受电压驱使且通过电极本体 200时， 可降低电极本体 200 对外接触面的电阻，提高充放电的效率。 而第三弯折部 203也因为该电极本体 200是片状金属材质所形成， 藉由片状金属原有的弹性效果， 以该第三弯折部 203为支撑点，使该接触部 240对外连接时具有上下的緩冲效果，该接触部 240 形成具防震效果的对外接触点，减少习知钢性材料的相对应力对电极所产生的 破坏变形， 增加锂电池的使用寿命。
请再参阅图 3 , 实施上因为固定的需求， 例如二个以上的锂电池透过电性 连接组件相串联或并联时， 该盖板本体 100 上表面 102 可设置一固定组件 400, ,实施上可以在该盖板本体 100一体制设成型时将该固定组件 400的封接 部 401包覆于该盖板本体 100内，在由该盖板本体 100上表面 102外露其固定 部 402, 方便串联或并联时锂电池连接时透过该固定部 402锁固连接。 实施上 该固定组件 400可形成于接触部 240下方，且依该盖板本体 100厚度因素， 制 造上在该盖板本体 100内部该固定组件 400的封接部 401与被包覆部 210可以 是非接触状态或接触状态。
藉此该固定组件 400不再如同现有技术与电极直接相连接，在如电动自行 车、 电动轮椅等高震荡环境使用时，将不在因为连接固定因素而破坏电极本体 200与盖板本体 100间的连接关系。
请再参阅图 4与图 5 , 为本发明第二实施例的立体与剖面示意图。 以本发 明应用于圆柱形的锂电池为说明例， 一般圆柱形锂电池的电极分别由两端导 电， 所以盖板本体 500上会有一片状金属材质的电极本体 600, 用以电性连接 罐体 700内电池正极或负极 (图中未示），电极本体 600中间段为被包覆部 610, 该被包覆部 610设置于该盖板本体 500内，且该被包覆部 610两端分别形成第 一、 二弯折部 601、 602, 第一弯折部 601延伸形成该连接部 620由该盖板本 体 500下表面 501露出， 用与罐体 700内电池的正极 (或负极)电性连接， 而该 第二弯折部 602延伸形成输出部 630由该盖板本体 700上表面 502露出，用以 对外导电； 且该输出部 630—端形成第三弯折部 603 , 由该第三弯折部 603延 伸形成该接触部 640可用于对外电性连接时的接触应用。
与第一实施例相同，该盖板本体 500利用绝缘防水材以射出成型方式一体 制设成型， 可采用任何已知的材料与方法。 为了预防光线透过， 可采用任何已 知方法，如在该盖板本体 500内设置金属片增加物理强度与防光，或在该盖板 本体 500贴附或涂抹防光材料。
电极本体 600 也与第一实施说明的相同， 可采用任何已知的导电金属材 质， 例如常用的铜、 铝等金属材质。
请再参阅图 6, 实施上因为固定的需求， 例如二个以上的锂电池透过电性 连接组件相串联或并联时， 该盖板本体 500上表面 502也可设置一固定组件 800, 该固定组件 800的封接部 801包覆于该盖板本体 500内， 在由该盖板本 体 500上表面 502外露其固定部 802, 实施制造上在该盖板本体 500内部该封 接部 801与被包覆部 610可以是非接触状态或接触状态。。 一般圆柱形的锂电 池将该固定组件 800设于该盖板本体 500上表面 502的圆心处，形成于接触部 640下方， 方便串联或并联圆柱形的锂电池连接使用。
以上所述者，仅为本发明的较佳实施例而已， 当不能以此限定本发明实施 的范围，即大凡依本发明申请保护范围及发明说明内容所作的筒单的等效变化 与修饰， 皆仍属本发明权利要求涵盖的范围内。

Claims

权 利 要 求
1.一种锂电池的电极结构， 将锂电池的罐体内电池正极、 负极对外电性连 接的电极结构， 其特征在于， 包括：
一盖板本体 ^
至少一片状金属材质的电极本体， 该电极本体中间段为一被包覆部， 该被 包覆部设置于该盖板本体内，且该被包覆部一端形成一第一弯折部， 该第一弯 折部延伸形成一连接部由该盖板本体下表面露出，该被包覆部另一端形成一第 二弯折部， 该第二弯折部延伸形成一输出部由该盖板本体上表面露出。
2.如权利要求 1所述的电极结构， 其特征在于， 该输出部形成一第三弯折 部， 由该第三弯折部延伸形成一接触部。
3.如权利要求 1所述的电极结构， 其特征在于， 该盖板本体利用绝缘防水 材以射出成型方式一体制设成型。
4.如权利要求 1所述的电极结构， 其特征在于， 该盖板本体的上表面设有 至少一固定组件。
5.如权利要求 4所述的电极结构， 其特征在于， 该固定组件与该电极本体 的被包覆部为非接触状态。
6.如权利要求 4所述的电极结构， 其特征在于， 该固定组件与该电极本体 的被包覆部为接触状态。
PCT/CN2010/079544 2010-12-08 2010-12-08 锂电池的电极结构 WO2012075626A1 (zh)

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