CN1212678C - 具有薄膜型外壳的电池 - Google Patents
具有薄膜型外壳的电池 Download PDFInfo
- Publication number
- CN1212678C CN1212678C CNB021078882A CN02107888A CN1212678C CN 1212678 C CN1212678 C CN 1212678C CN B021078882 A CNB021078882 A CN B021078882A CN 02107888 A CN02107888 A CN 02107888A CN 1212678 C CN1212678 C CN 1212678C
- Authority
- CN
- China
- Prior art keywords
- electrode plate
- battery
- electrode body
- positive electrode
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003351 stiffener Substances 0.000 claims description 24
- 230000004888 barrier function Effects 0.000 claims description 16
- 230000003014 reinforcing effect Effects 0.000 abstract 2
- 238000004804 winding Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 229920000867 polyelectrolyte Polymers 0.000 description 3
- 238000007634 remodeling Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910012820 LiCoO Inorganic materials 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical class [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 210000003953 foreskin Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
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
- H01M10/058—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
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/579—Devices or arrangements for the interruption of current in response to shock
-
- 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
- H01M50/117—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
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- 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
- H01M50/133—Thickness
-
- 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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
- H01M50/466—U-shaped, bag-shaped or folded
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/40—Printed batteries, e.g. thin film 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
本发明旨在提供一种具有薄膜型外壳的电池,具有良好的能量密度及强度性能。所述具有薄膜型外壳的电池,电极体被置于该外壳内,外壳由折叠在一起的薄膜形成,电极体由至少一个正电极板和负电极板与夹在这些电极板之间的隔膜一起层压而成,并有至少一个长方形的外表面。所述电池包括加强板,安装在电极体上,以便覆盖长方形外表面与正电极板的至少一个角部对应的区域。采用这种结构,对外壳角部跌落的撞击受到加强板缓冲,防止正电极板刺破隔膜,因此防止与负电极板发生短路。当负电极板和正电极板均为带状,负电极板比正电极板宽,而且所述电极体是通过卷绕正电极板和负电极板以及夹在二者之间的隔膜形成的螺旋状电极体时,本发明尤其有效。
Description
技术领域
本发明涉及一种改进具有薄膜型外壳电池,如聚合物电池强度的技术。
背景技术
近年来,随着小型电子装置,如移动电话、便携式视听装置、数字摄象机、和个人数字辅助工具(PDA)的广泛发展,对薄而轻并且能量密度高的电池的需求越来越大。为了满足这一需求,已经提出一种电池,如锂离子聚合物电解液电池,具有小巧的长方体形状的薄膜型外壳(这里所用术语“小巧”是指几个毫米的量级)。具体地说,这是一种新型电池,电极体形成为小巧的长方体形状,并放置在外壳内,所述外壳由柔软、非常薄的薄膜折叠在一起构成。这样的电池能够做得非常小巧而且轻,同时能量密度相当大。为此,以这样的电池作为上述各类小型电子装置所需电源的期望日趋高涨。
一般说来,由于外壳柔软,比如在落在地上时,具有薄膜型外壳的电池容易变形(尤其是由于受压而使侧面弯曲或凹陷)。当薄膜型外壳变形时,通常装在里面的电极体也变形,这样可能导致短路。
一种解决这个问题的方法是在电池的底部安装塑料的模塑加强板,以便缓冲摔落时的影响。然而,这种加强板由于占据电池内的空间而导致电池的能量密度降低。
如上所述,对于具有薄膜型外壳的电池一直有需要解决的问题。
发明内容
本发明的目的在于提供一种具有薄膜型外壳的电池,其能量密度以及强度性能都良好。
本发明的上述目的通过一种被覆盖在外壳内的电池实现的,所述外壳由弯折在一起的薄膜构成,所述电池包括:电极体,由至少一个正电极板和至少一个负电极板与夹在这些电极板之间的隔膜形成,并具有至少一个长方形的外表面;以及加强板,安装在所述电极体上,以便覆盖长方形外表面与正电极板的至少一个角部对应的区域。
这里,本发明在以下情况下是特别有效的。使所述负电极板和正电极板是带状的,并且所述负电极板比所述正电极板宽,而且所述电极体是通过如下步骤形成的螺旋状电极体:(1)一起卷绕所述正电极板和负电极板以及夹在二者之间的隔膜;(2)从圆周方向压卷绕的电极板,以便形成长方形的外表面。
另外,所述加强板还可以起卷绕的固定板的作用,用以固定所述电极板的卷绕端,该电极板形成所述电极体的最外层。
另外,在所述正电极板形成所述电极体外表面的情况下本发明特别有效。
附图说明
通过以下结合附图的描述,本发明的这些以及其他目的、优点和特征将变得更清楚,这些附图示出本发明的一种具体实施例。其中:
图1是本发明实施例1的锂离子聚合物电池1的局部剖面图;
图2是图1所示电池的剖面图;
图3是表示实施例1一种变形的局部剖面图;
图4是本发明实施例2电池的局部剖面图;
图5是本发明实施例3电池的局部剖面图。
具体实施方式
1.实施例1
1-1.聚合物电池的结构
图1是锂离子聚合物电池1(下称“电池1”)的局部剖面图,所述电池1是本发明实施例1的非水电解液电池。图2是电池1的剖面图(沿x方向在外壳10的侧面附近y-z平面的剖面)。
如图1和2所示,电池1的外壳10的两个侧面都折叠。外壳10内装有由聚合物电解液构成的电极体20。电池1还具有铝制的正电极板接线端11和由镍制成的负电极板接线端12,两个电极板端接线端分别从电极体20向上延伸(沿y方向)到外壳10外部。
具体地说,外壳10由固定长度(厚度为100μm)的条形聚丙烯/铝/聚丙烯层压膜构成,该层压膜在中部折叠并切割为预定宽度。然后把折叠板的两边热压粘接,以便形成包皮形式。于是,电极体20被封闭在外壳10内。
把正电极板21和负电极板23(见图2)卷绕在一起构成电极体20,二者之间夹有隔膜22,从而形成螺旋状电极,再把螺旋状电极压平以便形成长方形(具体地说,是薄长方体形状)。电极体20中灌注胶质聚合物电解液。
要说明的是,电极体20的侧面是弯曲的,这意味着电极体20不是精确的长方形。这里所用的术语“长方形”就包括这样的形状。
正电极板21由铝箔构成,上面加有锂钴氧化物LiCoO2。
负电极板23由铜箔构成,上面加有石墨粉。
隔膜22由多孔聚乙烯构成,厚度为0.03mm。
要说明的是,如图2所示,电极体20被构成如下形式,即沿y方向,负电极板23比正电极板21长,并且隔膜22比负电极板23长。这种设置确保负电极板23的面积比正电极板21的大。采用这样的结构,在充电的时候,负电极板23充分吸收来自正电极板21的锂离子,从而防止出现枝晶。图1中所示的参考标号105表示包裹固定片,用于固定正电极板21的最外端。
灌注电极体20所用的聚合物电解液被以如下方式制备。首先,以1∶10的比例把聚二丙烯乙二醇酯与EC/DEC混合物(质量比为30∶70)混合。往里面加入1摩尔/升的LiPF6,把所形成的混合物经过热聚合,以便再现为胶质形式。
正电极板21和负电极板23分别具有以如下方式连接于其上的正电极板接线端11和负电极板接线端12,即要使各接线端露出在外壳10的外部。正电极板接线端11和负电极板接线端12分别由改性的聚丙烯103和104包裹,用以在与外壳10的封闭部分102相应的位置处封闭,所述外壳10内装有电极体20。封闭部分201在与改性的聚丙烯103、104相应的位置处热压粘接,以便气密性封闭外壳10。
如图1所示,实施例1的特征在于:把由聚烯烃基材制成的加强板S1和S2沿着电极体20的两侧安装到它的外表面上。这些加强板S1和S2以如下方式安装到电极体20(或等效地安装在正电极板21)的外表面上,也即相对于电极体20的四角覆盖正电极板21的边缘部分以及隔膜22的暴露部分。设置加强板S1和S2的理由如下所述。
1-2.实施例1的效果
比如当掉落在地板上时,具有薄膜型外壳的电池通常比装在金属等外壳内的电池更容易变形。当薄膜型外壳变形时,装在里面的电极体也容易变形,这可能导致短路。通过本发明人的大量研究,发现当电池的角碰到地板时容易发生短路,结果,在碰撞时,导致构成电极体的外电极板的角刺破隔膜。当把正电极板设置成构成电极体的外电极板时,更是这样。在这种情况下,负电极板经隔膜位于电极体的角上,所以容易发生短路。而且,当电极体被压平时,电极板沿着电极体的纵边方向弯曲,这样通常导致弯曲部分的角尖锐地突出。在这种情况下,撞击尖角容易导致这么尖锐的突出部分刺破隔膜,结果导致发生短路。
相反,按照上述电池1的结构,隔膜22在关于正电极板21的四个角上被正电极板21以及加强板S1和S2覆盖,所述正电极板21设置成电极体20的最外层。采用这种结构,由加强板缓冲对外壳的角部的撞击,这样就防止正电极板刺破隔膜,从而避免发生与负电极板短路。另外,在本实施例的聚合物电池中,加强板由相当薄的板制成,而且只是沿着电极体20的纵边设置。这样就实现避免能量密度下降的显著效果。
当使用有如实施例1中那样的具有螺旋状电极体20的电池时,上述加强板S1和S2是特别有效的,因为这样的电池易于因摔落撞击或其他撞击而发生内部短路。
要说明的是,图2只示出加强板S1,而在本实施例中,还以相同方式设有加强板S2。
图3是本发明实施例1一种变形的从前面看时的视图。在该图中,在与电极体20相应的位置处,将外壳10切开,以便示出里面的结构。如图所示,该电池是加强板S1或S2也起包裹固定片作用的一个例子,用于固定正电极板21的外端。本发明是可以做如此改进的。
2.其他实施例
以下将描述本发明的其他实施例。
2-1.实施例2
图4是实施例2的电池从前面看时的局部剖视图。如图所示,该电池的结构是将负电极板23设置为电极体20的最外层。可将本发明用于这种结构的电池上。具体地说,在该例中,加强板S1和S2的长度及设置方式如下,即它们至少沿y方向(更精确地说,沿y方向至少覆盖正电极板23的未示出边缘,这些边缘在图中位于隔膜的后面)完全覆盖负电极板23。采用这样的结构,达到与上述实施例一样的效果。
要说明的是,加强板S1和S2中每一个都被设置成沿y方向覆盖正电极板的至少上边或下边之一就足够了。
2-2.实施例3
图5是实施例3的电池从前面看时的局部剖视图。如图所示,该电池的结构是,以如下方式将加强板SA1、SA2、SB1和SB2设置在电极体20的四个角上,象四个分开的点,覆盖正电极板21的y方向的边以及隔膜22的暴露部分。采用这样的结构,也达到与上述实施例一样的效果。
要说明的是,在一定程度上,只设置加强板SA1、SA2、SB1和SB2S之一仍然能够达到上述效果。然而,最好是在电池的底部设置两个加强板SA1和SA2,设置所有四个加强板则更好。
3.比较各实施例性能的实验
作为本发明实施例的电池,制造以下各电池。以同样方式制造比较例的电池,只是未设置加强板。
*实施例电池1(对应于实施例1)
*实施例电池2(对应于实施例2)
*实施例电池3(对应于实施例的改型,如图3所示)
*比较电池1(负电极板作为最外层的电池)
比较电池2(正电极板作为最外层的电池)
上述五种类型电池中的每一种都制造了五十个,并进行跌落实验,也即使它们从1.9米的高度跌落。给每个电池安装一个夹具,以使电池的底部首先撞击地板。每个电池都跌落到发生短路为止。对每一种电池研究跌落的平均次数。下面的表1示出实验所得的数据。
表1
实施例电池1 | 实施例电池2 | 实施例电池3 | 比较电池1 | 比较电池2 | |
短路所需跌落的次数 | 22 | 24 | 23 | 12 | 6 |
从表1可以清楚地看到,实施例电池1至3都表现出良好的短路发生率,比比较电池的短路发生率少一半还多,因此证明了本发明的良好性能。即本发明实现了能量密度和强度都良好的薄膜型外壳电池。
4.其他要点
上述各实施例主要是正电极板21作为电极体20最外层的电池。这只是因为当把正电极板21安排成电极体20的最外层时,更经常发生内部短路。本发明可适用于具有上述以外其它结构电极体的电池(具有实施例2的结构),仍然能够达到良好的效果。
虽然上述实施例都是关于锂离子聚合物电池的,但是本发明并不限于这些实施例。本发明可适用于具有其他类型电极体的电池。
另外,作为加强板的材料也不限于上述各实施例所提到的材料。可能的材料举例包括聚丙烯带、聚苯撑硫带、和聚酰亚胺带。
再有,上述实施例中所用的外壳都由层压的膜制成。然而,本发明并不限于这些特定的实施例。本发明的薄膜型外壳可以由层压的膜以外的膜层制成。
虽然参考附图以举例方式充分描述了本发明,但是应该说明,显然本领域的普通技术人员可以进行各种变化和改型。因此,除非这样的变化和改型偏离本发明的范围,否则都应该被包括在本发明内。
Claims (4)
1.一种具有薄膜型外壳的电池,包括:
电极体,由至少一个正电极板和至少一个负电极板以及夹在这些电极板之间的隔膜形成,并具有至少一个长方形的外表面;以及
加强板,置于所述外壳与电极体之间并安装在所述电极体上,覆盖长方形外表面与正电极板的至少一个角部对应的区域。
2.根据权利要求1所述的电池,其中:
所述负电极板和正电极板是带状的,
所述负电极板比所述正电极板宽,以及
所述电极体是螺旋状电极体,该螺旋状电极体是由正电极板和负电极板以及夹在其间的隔膜一起卷绕而成的,并通过向所述电极体的圆周方向加压使其外表面为长方形。
3.根据权利要求1所述的电池,其中:
所述电极体是螺旋状电极体,它是通过卷绕带状正电极板、负电极板和夹在其间的隔膜形成的;以及
所述加强板为卷绕的固定板,用以固定所述电极板的卷绕端,同时形成所述电极体的最外层。
4.根据权利要求1所述的电池,其中:所述正极板形成在所述电极体的外表面。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP200188833 | 2001-03-26 | ||
JP2001088833A JP4004236B2 (ja) | 2001-03-26 | 2001-03-26 | フィルム状外装体を備えた電池 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1378294A CN1378294A (zh) | 2002-11-06 |
CN1212678C true CN1212678C (zh) | 2005-07-27 |
Family
ID=18943863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB021078882A Expired - Lifetime CN1212678C (zh) | 2001-03-26 | 2002-03-26 | 具有薄膜型外壳的电池 |
Country Status (6)
Country | Link |
---|---|
US (1) | US6727018B2 (zh) |
JP (1) | JP4004236B2 (zh) |
KR (1) | KR100789069B1 (zh) |
CN (1) | CN1212678C (zh) |
HK (1) | HK1050429A1 (zh) |
TW (1) | TW543218B (zh) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100553200B1 (ko) * | 2003-06-19 | 2006-02-22 | 삼성에스디아이 주식회사 | 전지 팩 |
JP2005093242A (ja) * | 2003-09-17 | 2005-04-07 | Sanyo Electric Co Ltd | 二次電池 |
JP4502616B2 (ja) * | 2003-09-30 | 2010-07-14 | 三洋電機株式会社 | フィルム状外装体を有する電池 |
KR100553753B1 (ko) | 2003-10-16 | 2006-02-20 | 삼성에스디아이 주식회사 | 파우치형 이차전지 |
US20070096688A1 (en) * | 2003-11-05 | 2007-05-03 | Gs Yuasa Corporation | Battery |
CN1301563C (zh) * | 2004-06-21 | 2007-02-21 | 有量科技股份有限公司 | 蓄电器的制造方法及其制作装置 |
JP4862277B2 (ja) * | 2005-05-10 | 2012-01-25 | 三菱自動車工業株式会社 | 電池 |
KR100878703B1 (ko) * | 2005-11-28 | 2009-01-14 | 주식회사 엘지화학 | 측면 실링부에 pcm이 장착되어 있는 소형 전지팩 |
KR100873309B1 (ko) * | 2006-07-10 | 2008-12-12 | 주식회사 엘지화학 | 외부충격에 대해 우수한 안전성을 제공하는 이차전지용안전부재 |
KR100877811B1 (ko) * | 2006-07-28 | 2009-01-12 | 주식회사 엘지화학 | 양측 하단에 단차가 형성되어 있는 이차전지용 안전부재 |
KR100870354B1 (ko) * | 2007-05-18 | 2008-11-25 | 삼성에스디아이 주식회사 | 전지외장재 및 그를 이용한 이차전지 |
CN101437370B (zh) * | 2007-11-14 | 2012-06-13 | 深圳富泰宏精密工业有限公司 | 内置式电池装置及其与电路板的组装方法 |
KR101100990B1 (ko) * | 2009-12-15 | 2011-12-29 | 삼성에스디아이 주식회사 | 이차전지 |
KR20130046999A (ko) * | 2011-10-31 | 2013-05-08 | 에스케이이노베이션 주식회사 | 배터리셀 및 이를 포함하는 배터리 모듈 |
KR101680755B1 (ko) * | 2012-02-13 | 2016-11-30 | 에스케이이노베이션 주식회사 | 배터리셀 |
KR101798929B1 (ko) * | 2015-12-23 | 2017-11-17 | 주식회사 엘지화학 | 보강용 라벨을 포함하는 전지케이스 및 이를 포함하고 있는 이차전지 |
KR102186737B1 (ko) * | 2016-12-12 | 2020-12-04 | 주식회사 엘지화학 | 보호 부재를 포함하고 있는 전지셀 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990025360A (ko) * | 1997-09-12 | 1999-04-06 | 양재신 | 전기자동차용 밧데리 구조 |
EP1033766B1 (en) * | 1998-09-11 | 2009-01-07 | Panasonic Corporation | Battery pack |
JP2000182579A (ja) * | 1998-12-16 | 2000-06-30 | Toshiba Battery Co Ltd | 板状ポリマー電解質電池 |
JP2000195475A (ja) * | 1998-12-25 | 2000-07-14 | Mitsubishi Chemicals Corp | 二次電池 |
KR20000015920U (ko) * | 1999-01-20 | 2000-08-16 | 김순택 | 리튬이온 이차전지 |
CN1303718C (zh) * | 1999-03-26 | 2007-03-07 | 松下电器产业株式会社 | 叠合片封装型电池 |
JP2000277160A (ja) * | 1999-03-29 | 2000-10-06 | Japan Storage Battery Co Ltd | 非水電解質二次電池 |
JP3721044B2 (ja) * | 1999-03-30 | 2005-11-30 | 株式会社東芝 | 二次電池 |
JP3578678B2 (ja) * | 1999-08-18 | 2004-10-20 | 松下電器産業株式会社 | 電池パック |
JP2001110402A (ja) * | 1999-10-13 | 2001-04-20 | Mitsubishi Chemicals Corp | リチウム二次電池 |
JP2001283798A (ja) * | 2000-03-29 | 2001-10-12 | Sanyo Electric Co Ltd | ラミネート外装体を備えた電池 |
JP4821043B2 (ja) * | 2000-11-08 | 2011-11-24 | Tdk株式会社 | 電気化学デバイス |
JP2002175839A (ja) * | 2000-12-08 | 2002-06-21 | Nec Tokin Tochigi Ltd | 密閉型電池 |
-
2001
- 2001-03-26 JP JP2001088833A patent/JP4004236B2/ja not_active Expired - Lifetime
-
2002
- 2002-03-22 TW TW091105543A patent/TW543218B/zh not_active IP Right Cessation
- 2002-03-26 CN CNB021078882A patent/CN1212678C/zh not_active Expired - Lifetime
- 2002-03-26 KR KR1020020016274A patent/KR100789069B1/ko not_active IP Right Cessation
- 2002-03-26 US US10/105,261 patent/US6727018B2/en not_active Expired - Lifetime
-
2003
- 2003-04-09 HK HK03102531A patent/HK1050429A1/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TW543218B (en) | 2003-07-21 |
US6727018B2 (en) | 2004-04-27 |
JP4004236B2 (ja) | 2007-11-07 |
HK1050429A1 (en) | 2003-06-20 |
JP2002289154A (ja) | 2002-10-04 |
KR20020076156A (ko) | 2002-10-09 |
KR100789069B1 (ko) | 2007-12-26 |
CN1378294A (zh) | 2002-11-06 |
US20020192544A1 (en) | 2002-12-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1212678C (zh) | 具有薄膜型外壳的电池 | |
CN100340028C (zh) | 可再充电电池 | |
US20050214642A1 (en) | Electrode package and secondary battery using the same | |
CN1574442A (zh) | 袋型二次锂电池及其制造方法 | |
CN1841831A (zh) | 电池及其制造方法 | |
US9570776B2 (en) | Lithium-ion secondary battery and method of producing the same | |
US20110244312A1 (en) | Stack type battery | |
KR20070112345A (ko) | 전지 구조체 | |
CN1574422A (zh) | 一种胶结型电极组件以及采用这种电极组件的二次电池 | |
CN1783534A (zh) | 电池 | |
CN1992379A (zh) | 袋型锂可再充电电池 | |
CN102386435A (zh) | 棱柱形可再充电电池 | |
JP2007026734A (ja) | バイポーラ電池、組電池及びそれらの電池を搭載した車両 | |
WO2013108708A1 (ja) | 非水電解質二次電池の製造方法 | |
CN1783568A (zh) | 锂充电电池 | |
CN1716660A (zh) | 二次电池 | |
CN1841834A (zh) | 涡旋式电极的角型电池 | |
CN1315202C (zh) | 电池 | |
CN1753228A (zh) | 二次电池 | |
CN1531125A (zh) | 电极单元和使用该电极单元的二次电池 | |
CN1753207A (zh) | 可再充电电池 | |
KR101572832B1 (ko) | 계단 구조의 전극군 적층체 | |
JP2011103249A (ja) | 二次電池 | |
CN112204791A (zh) | 电池及电池包 | |
CN112740457A (zh) | 非水电解质二次电池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20050727 |