WO2006128319A1 - Accumulateur au lithium a grande capacite avec emballage mou en plastique et aluminium - Google Patents

Accumulateur au lithium a grande capacite avec emballage mou en plastique et aluminium Download PDF

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Publication number
WO2006128319A1
WO2006128319A1 PCT/CN2005/000760 CN2005000760W WO2006128319A1 WO 2006128319 A1 WO2006128319 A1 WO 2006128319A1 CN 2005000760 W CN2005000760 W CN 2005000760W WO 2006128319 A1 WO2006128319 A1 WO 2006128319A1
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WIPO (PCT)
Prior art keywords
aluminum
plastic bag
pole
electrode terminal
ion battery
Prior art date
Application number
PCT/CN2005/000760
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English (en)
French (fr)
Inventor
Hingka Chung
Original Assignee
Hingka Chung
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Publication date
Application filed by Hingka Chung filed Critical Hingka Chung
Priority to PCT/CN2005/000760 priority Critical patent/WO2006128319A1/zh
Publication of WO2006128319A1 publication Critical patent/WO2006128319A1/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
    • 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
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • 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
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • 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
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/136—Flexibility or foldability
    • 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
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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 invention relates to a lithium ion battery, and more particularly to a large capacity lithium ion battery of an aluminum plastic soft shell.
  • Lithium solid power battery CN2615878Y “Structural improved rechargeable lithium battery with repeated charge and discharge”
  • CN2615877Y High-voltage lithium-ion battery that can be repeatedly charged and discharged”
  • the existing large-capacity power lithium-ion battery adopts a multi-layer positive and negative plate stacking structure, that is, two positive and negative plates are arranged in the casing filled with the electrolyte.
  • a lithium ion battery core composed of a diaphragm stack.
  • the battery core is usually placed in an aluminum plastic bag filled with an electrolyte and then placed in the casing.
  • the pole-extracting holes opened on the aluminum-plastic bag are sealed by gluing, and the sealing portion is neither standardized nor flat. Therefore, the gluing and sealing operation is usually manual operation, and it is difficult to achieve the consistency of the sealing operation, and it is difficult to ensure the sealing quality. If the sealing is slightly wrong, it will cause the electrolyte to leak out, which will affect the normal use and life of the battery. The electrolyte that leaks out will pollute the environment and cause harm to the human body. It can be seen that the seal of the aluminum plastic bag The quality of the package is an extremely important part of the lithium-ion battery manufacturing process, and it will directly affect the quality of the battery.
  • the object of the present invention is to provide a large-capacity lithium ion battery of aluminum-plastic soft shell with good sealing specifications and good sealing performance in view of the shortage of the aluminum-plastic bag sealing of the above-mentioned large-capacity power lithium ion battery.
  • the large-capacity lithium ion battery of the aluminum-plastic soft shell of the invention comprises: a battery core body composed of two or more rectangular sheet-shaped lithium ion battery positive and negative electrode sheets and a diaphragm stacked alternately, an electrolyte solution and an aluminum plastic bag; positive and negative electrodes The uncoated substrate end faces are respectively bound by the strip column head; the aluminum plastic bag is provided with a pole lead-out hole, wherein the aluminum-plastic bag pole between the lead-out hole and the pole of the battery core is mechanical.
  • Sealing that is, a sealing plate is arranged inside the pole-outlet hole of the aluminum-plastic bag, and the sealing plate is provided with a through-hole corresponding to the pole-outlet hole of the aluminum-plastic bag; the pole is provided with a thread and is provided with a screw The cap; the nut screwed on the pole column cooperates with the sealing plate to close the pole lead-out hole of the aluminum plastic bag between the two.
  • the large-capacity lithium ion battery of the aluminum-plastic soft shell of the invention has a scientific design and a reasonable structure. It subtly transforms the adhesive seal into a mechanical seal, which overcomes the defects of poor consistency of the adhesive seal and unstable seal quality.
  • the use of this mechanical seal not only ensures the sealing and consistency of the sealing of the aluminum-plastic bag, but also greatly facilitates the operation.
  • the robust mechanical seal makes it possible to directly make the aluminum-plastic bag a packaging for large-capacity lithium-ion batteries.
  • the use of aluminum plastic bags as packaging casings for large-capacity lithium-ion batteries can reduce their manufacturing costs and reduce the weight and volume of batteries, which will bring positive benefits for storage and transportation.
  • the high-capacity lithium ion battery aluminum plastic bag sealing technical solution disclosed by the invention is applicable to liquid lithium ion battery and semi-solid lithium Ion batteries are also suitable for solid polymer lithium-ion batteries.
  • Figure 1 is a schematic view showing the structure of a large-capacity lithium ion battery of aluminum-plastic soft shell
  • Fig. 2 is a view showing the structure of a battery core of a large-capacity lithium ion battery of the aluminum-plastic soft shell shown in Fig. 1.
  • a large-capacity lithium ion battery of an aluminum-plastic soft shell is composed of an aluminum plastic bag 1 and a battery core 2.
  • the battery core 2 is formed by alternately stacking two or more rectangular sheet-shaped lithium ion battery positive electrode sheets 21, a negative electrode sheet 22, and a separator 23, and then being bound by two strip-column beam heads 3;
  • the two sides of the positive and negative electrode sheets 21 and 22 are respectively provided with uncoated substrate faces 24 and 25, and the uncoated substrate faces 24 and 25 at both ends of the positive and negative electrode sheets 21 and 22 are arranged in opposite directions;
  • the pole beam head 3 is composed of a beam head body 31, a pressure plate 33 fixed on both sides of the beam head body 31 by bolts 32, and three pole posts 34 disposed on the beam head body 31; alternating positive and negative electrode pieces
  • the uncoated substrate faces 24 and 25 of 21, 22 are fixedly attached to the beam head body 31 by the pressing plate 33 of the pole beam head 3 and the bolt 32, respectively, and positive and negative output poles are formed at both ends of the battery core body 2.
  • Column 34 is composed of a beam head body 31, a pressure plate 33 fixed on both sides of the beam head
  • the aluminum plastic bag 1 is provided with a pole lead-out hole 11 corresponding to the positive and negative output poles 34 of the battery core 2.
  • a sealing plate 4 is disposed on the pole post 34 side of the beam head body 31, and the sealing plate 4 is opened a through hole for the pole 34; the pole 34 is provided with a thread and is provided with a nut 35.
  • the sealing plate 4 is mounted on the pole 34 side of the beam head 31, and is screwed on the pole 3 ⁇ 1 mother 35 Cooperating with the sealing plate 4, the aluminum-plastic bag 1-pole lead-out hole 11 sandwiched therebetween can be tightly closed.
  • the assembly relationship between the battery core 2 and the aluminum plastic bag 1 First, the sealing plate 4 is placed on the poles 34 of the battery core 2, and then placed in the aluminum plastic bag 1, and the poles 34 at both ends of the battery core 2 are placed. Extending from the corresponding pole lead-out hole 11 respectively, the sealing plate 4 is padded inside the aluminum-plastic bag 1 pole lead-out hole 11 , and finally the nut 35 is screwed on the threaded port of each pole 34 until it is tightened. The pole lead-out hole 11 of the aluminum-plastic bag 1 between the nut 35 and the sealing plate 4 is closed by the clamping fit of the nut 35 and the sealing plate 4.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)

Description

技术领域
本发明涉及的是锂离子电池，尤其是一种铝塑软壳之大容量锂离 子电池。
技术背景
目前，为增加锂离子电池的储电能力， 以延长锂离子电池的放电 时间，制造商提出了很多可提高锂离子电池容量的技术方案，如中国 专利 CN1307376A《一种可反复充放电的铬氟锂固体动力电池》、 CN2615878Y 《结构改进之可反复充放电大容量动力锂电池》、 CN2615877Y《可反复充放电之高电压锂离子电池》等， 为制造大容 量动力锂离子电池提供了切实可行的技术方案，从公开的专利文献可 看到，现有大容量动力锂离子电池都釆用多层正负极板叠摞结构，即： 在充满电解液的壳体内设置有两正、负极板和隔膜叠摞构成的锂离子 电池芯体。为防止其内电解液的渗出，通常是将电池芯体装入充满电 解液的铝塑袋后再置入壳体内。 目前，在电池芯体和电解液置入铝塑 密袋后，开设在铝塑袋上的极柱导出孔均采用胶粘方式封口，其封口 部位既不规范， 亦不平整。 因此， 其胶粘封口作业通常为人工操作， 很难做到封口操作的一致性， 亦难确保封口质量。封口稍有差错， 即 会导致其内电解液外渗，从而影响电池的正常使用和寿命，渗出的电 解液会对环境造成污染， 对人体会造成伤害。 由此可见， 铝塑袋的封 装质量是锂离子电池制造过程中极为重要的环节，它将直接关系到电 池的质量。
发明内容
本发明的目的是针对上述大容量动力锂离子电池铝塑袋封口存 在的不足，提供一种封口规范、密封性好的铝塑软壳之大容量锂离子 电池。
本发明铝塑软壳之大容量锂离子电池，包括： 由两块以上矩形片 状锂离子电池正、负极片和隔膜交替叠摞构成的电池芯体、电解液和 铝塑袋； 正、负极片无涂层基板面端分别由带极柱束头装订连接； 铝 塑袋上设有极柱导出孔，其特征在于：铝塑袋之极柱导出孔与电池芯 体之极柱间为机械密封，即：在铝塑袋之极柱导出孔内侧设有封口板， 封口板上设有与铝塑袋上极柱导出孔相对应的通孔； 极柱上设有螺 纹，并配有螺帽；旋拧在极柱上的螺帽与封口板配合将处于两者间的 铝塑袋之极柱导出孔封闭。
本发明铝塑软壳之大容量锂离子电池设计科学，结构合理。它巧 妙地将胶粘封口变换为机械封口， 克服了胶粘封口存在操作一致性 差， 封口质量不稳定之缺陷。采用本机械封口， 既可确保铝塑袋的封 口密封性和一致性， 又大大方便了操作。牢靠的机械密封， 使铝塑袋 直接成为大容量锂离子电池的包装外壳成为可能。用铝塑袋作为大容 量锂离子电池的的包装外壳即可降低其制造成本，又可减少电池的重 量和体积， 为仓贮和运输均会带来积极的效益。本发明公开的大容量 锂离子电池铝塑袋密封技术方案既适用于液态锂离子电池、半固态锂 离子电池， 亦适用于固态聚合物锂离子电池。
本发明铝塑软壳之大容量锂离子电池的具体结构由以下附图和 实施例详细给出。
附图说明
图 1是铝塑软壳之大容量锂离子电池的结构示意图
图 2是图 1所示铝塑软壳之大容量锂离子电池的电池芯体结构示 意图。
具体实施方式
实施例：从图 1可以清楚地看到铝塑软壳之大容量锂离子电池由 铝塑袋 1和电池芯体 2组成。
所述电池芯体 2如图 2所示，由两块以上矩形片状锂离子电池正 极片 21、 负极片 22、 隔膜 23交替叠摞后， 通过两只带极柱束头 3装 订连接构成； 所述正、 负极片 21、 22的两端分别设有无涂层基板面 24、 25, 正、 负极片 21、 22两端的无涂层基板面 24、 25以相反方向 布排； 所述带极柱束头 3由束头体 31、 设置在束头体 31两侧用螺栓 32固定的压板 33、 设置在束头体 31上的三只极柱 34构成； 交替叠 摞的正、负极片 21、 22之无涂层基板面 24、 25端分别通过带极柱束 头 3的压板 33和螺栓 32固定装订连接在束头体 31上， 在电池芯体 2两端形成正、 负输出极柱 34。
所述铝塑袋 1对应于电池芯体 2之正负输出极柱 34部位开设有 极柱导出孔 11。
所述束头体 31的极柱 34侧配设有封口板 4， 封口板 4上开设有 供极柱 34穿置的通孔； 极柱 34上均设有螺紋， 并配有螺母 35， 封 口板 4安装在束头体 31的极柱 34侧，旋制在极柱 3^ 1 母 35与 封口板 4配合可将夹制在其间的铝塑袋 1极柱导出孔 11压紧封闭。
电池芯体 2与铝塑袋 1的装配关系： 先在电池芯体 2两端极柱 34套上封口板 4，然后置于铝塑袋 1内，并使电池芯体 2两端的极柱 34分别从相应的极柱导出孔 11伸出， 此时封口板 4即衬垫在铝塑袋 1极柱导出孔 11内侧， 最后将螺母 35旋拧在各极柱 34螺纹口上， 直至拧紧， 此时处于螺帽 35与封口板 4间的铝塑袋 1之极柱导出孔 11即因螺帽 35与封口板 4的夹紧配合而封闭。

Claims

权 利 要 求 书
1、 一种铝塑软壳之大容量锂离子电池， 包括： 甶两块以上矩形 片状锂离子电池正、负极片和隔膜交替叠摞构成的电池芯体、 电解液 和铝塑袋； 正、 负极片无涂层基板面端分别由带极柱束头装订连接； 铝塑袋上设有极柱导出孔，其特征在于：铝塑袋之极柱导出孔与电池 芯体之极柱间为机械密封， 即：在铝塑袋之极柱导出孔内侧设有封口 板，封口板上设有与铝塑袋上极柱导出孔相对应的通孔； 极柱上设有 螺紋，并配有螺帽；旋拧在极柱上的螺帽与封口板配合将处于两者间 的铝塑袋之极柱导出孔封闭。
PCT/CN2005/000760 2005-05-31 2005-05-31 Accumulateur au lithium a grande capacite avec emballage mou en plastique et aluminium WO2006128319A1 (fr)

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WO2011119660A1 (en) * 2010-03-23 2011-09-29 International Battery, Inc. Package for large format lithium ion cells
CN115133106A (zh) * 2022-07-11 2022-09-30 厦门理工学院 一种防爆性能优异的铝塑软壳大容量锂离子电池
CN115189089A (zh) * 2022-08-03 2022-10-14 厦门理工学院 一种安全型防水多极柱大功率锂离子电池

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CN115133106A (zh) * 2022-07-11 2022-09-30 厦门理工学院 一种防爆性能优异的铝塑软壳大容量锂离子电池
CN115133106B (zh) * 2022-07-11 2024-05-03 厦门理工学院 一种防爆性能优异的铝塑软壳大容量锂离子电池
CN115189089A (zh) * 2022-08-03 2022-10-14 厦门理工学院 一种安全型防水多极柱大功率锂离子电池
CN115189089B (zh) * 2022-08-03 2023-06-02 厦门理工学院 一种安全型防水多极柱大功率锂离子电池

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