JP2001126767A - Nonaqueous electrolyte secondary battery - Google Patents
Nonaqueous electrolyte secondary batteryInfo
- Publication number
- JP2001126767A JP2001126767A JP30665199A JP30665199A JP2001126767A JP 2001126767 A JP2001126767 A JP 2001126767A JP 30665199 A JP30665199 A JP 30665199A JP 30665199 A JP30665199 A JP 30665199A JP 2001126767 A JP2001126767 A JP 2001126767A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- electrolyte secondary
- secondary battery
- synthetic resin
- cylindrical
- 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.)
- Withdrawn
Links
Classifications
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、非水電解液二次電
池に関し、特に正極電極および負極電極の間にセパレー
タを介在させて積層したものを巻回した電池要素を収容
した角型の非水電解液二次電池に関し、特に、径が小さ
な円筒型電池あるいは薄型の角型電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous electrolyte secondary battery, and more particularly to a rectangular non-aqueous electrolyte containing a battery element wound by laminating a battery with a separator interposed between a positive electrode and a negative electrode. The present invention relates to a water electrolyte secondary battery, particularly to a cylindrical battery having a small diameter or a thin rectangular battery.
【０００２】[0002]
【従来の技術】小型の電子機器の電源として各種の電池
が用いられており、携帯電話、ノートパソコン、カムコ
ーダ等の電源として、小型で大容量の密閉型電池である
リチウムイオン二次電池等の非水電解液二次電池が用い
られている。これらの非水電解液電池としては、円筒
型、角型の構造を有したものが用いられている。小型の
電子機器の電源として用いられているリチウムイオン電
池は、正極集電体および負極集電体にそれぞれ活物質を
塗布して製造した正極電極および負極電極をセパレータ
を介在させて積層したものを巻回した電池要素を電池缶
内に収納して密閉したものを用いられている。2. Description of the Related Art Various types of batteries are used as power supplies for small electronic devices, such as lithium-ion secondary batteries, which are small and large-capacity sealed batteries, as power supplies for mobile phones, notebook computers, camcorders and the like. A non-aqueous electrolyte secondary battery is used. As these non-aqueous electrolyte batteries, batteries having a cylindrical or square structure are used. Lithium-ion batteries used as power sources for small electronic devices are manufactured by applying a positive electrode current collector and a negative electrode current collector to each other by applying an active material and laminating a positive electrode and a negative electrode with a separator interposed therebetween. A battery element in which a wound battery element is housed in a battery can and hermetically sealed is used.
【０００３】これらの電池には、円筒型に巻回した電池
要素を円筒型の缶に収納した円筒型電池、直方体等の円
筒型以外の形状の缶に収納した角型電池が知られてい
る。円筒型電池においては、電池要素が円筒状であるの
で電池缶内に収容した場合にも電池要素に作用する力が
均等であり、電池反応も部位によらずに均等に起こると
いう特徴を有している。[0003] As these batteries, there are known a cylindrical battery in which a battery element wound in a cylindrical shape is housed in a cylindrical can, and a square battery in which a battery element other than a cylindrical shape such as a rectangular parallelepiped is housed. . Cylindrical batteries have the characteristic that even when they are housed in a battery can, the forces acting on the battery elements are uniform because the battery elements are cylindrical, and the battery reaction occurs evenly regardless of the location. ing.
【０００４】ところが、ノート型パソコン、携帯電話等
の電池使用機器は、一般には直方体状の形状を有してお
り、それらの電池収納部においては、円筒形状の電池で
は無効な容積が大きくなるという問題があり、また、電
池収納部分の厚さによって円筒型の電池の径が制限を受
けるので、薄型の機器においては容量の大きな円筒型電
池を使用することができないという問題点があった。そ
こで、小型、あるいは薄型の機器においては、円筒型の
電池に代えて厚みの薄い角柱状の角型電池が用いられて
いる。However, battery-powered devices such as notebook personal computers and mobile phones generally have a rectangular parallelepiped shape, and in such a battery storage portion, an ineffective volume becomes large with a cylindrical battery. There is a problem, and the diameter of the cylindrical battery is limited depending on the thickness of the battery housing portion. Therefore, there is a problem that a thin cylindrical device cannot use a large-capacity cylindrical battery. Therefore, in a small or thin device, a prismatic battery having a small thickness is used instead of a cylindrical battery.
【０００５】図３は、従来の電池の組立工程を説明する
図であり、図３（Ａ）は、電池の断面を説明する図であ
る。図３（Ａ）および（Ｂ）は円筒型の電池を説明する
図であり、図３（Ｃ）は薄型の角型電池を説明する図で
ある。円筒型電池では、図３（Ａ）に示すように電池缶
２の底部に絶縁板１２を挿入した後に、図３（Ｂ）に示
すように、正極活物質を塗布した正極電極と負極活物質
を塗布した負極電極をセパレータを介在させて巻回した
電池要素４を、円筒型電池缶１１の内部に挿入すること
が行われている。一般には、電池要素４の端面は、セパ
レータのみが突出し、正極電極あるいは負極電極のいず
れもは、端面には露出していない。したがって、通常の
使用においては正極電極あるいは負極電極がその端面に
おいて、缶底部の金属部分と接触して短絡を生じる可能
性は小さいが電池の安全性を高めるために、電池缶の底
部に絶縁板を挿入することが行われている。使用する電
池缶の径が比較的大きな円筒型電池缶の場合には、絶縁
板の挿入も容易であるが、径が小さく、径に比して長さ
が長い円筒状の缶、あるいは図３（Ｃ）に示すように薄
型の角型電池用の角型電池缶５の底部に絶縁板１２を挿
入する場合には、絶縁板を単に落としたのみでは、底部
に正確に到達しないという問題があった。FIG. 3 is a view for explaining a conventional battery assembling process, and FIG. 3A is a view for explaining a cross section of the battery. 3A and 3B are diagrams illustrating a cylindrical battery, and FIG. 3C is a diagram illustrating a thin rectangular battery. In the cylindrical battery, after inserting the insulating plate 12 into the bottom of the battery can 2 as shown in FIG. 3A, a positive electrode coated with a positive electrode active material and a negative electrode active material as shown in FIG. A battery element 4 in which a negative electrode coated with is wound with a separator interposed therebetween is inserted into a cylindrical battery can 11. In general, only the separator protrudes from the end face of the battery element 4, and neither the positive electrode nor the negative electrode is exposed at the end face. Therefore, in normal use, it is unlikely that the positive electrode or the negative electrode contacts the metal part of the bottom of the can at the end face, and a short circuit is generated. Inserting has been done. In the case of a cylindrical battery can having a relatively large diameter, it is easy to insert the insulating plate, but the cylindrical can has a small diameter and a longer length than the diameter, or FIG. As shown in (C), when the insulating plate 12 is inserted into the bottom of the rectangular battery can 5 for a thin rectangular battery, there is a problem that the bottom cannot be accurately reached by simply dropping the insulating plate. there were.
【０００６】そこで、絶縁板の配置が不良となったり、
また絶縁板を挿入しなかったものが生じることがないよ
うに絶縁板の配置状況を確認する工程が必要であった
り、また絶縁板の配置状態を修正する工程が必要であっ
た。また、絶縁板を缶底部に仮止めするために特定の化
学構造を有する接着剤を用いることが特開平１０−２４
７５２４号公報において提案されており、絶縁板に突起
を設けることによって絶縁板のずれを防止することが特
開平１０−２８４０４６号公報において提案されている
が、角型の扁平な電池の製造における絶縁板の挿入工程
における問題点を改善するものではなかった。Therefore, the arrangement of the insulating plate becomes defective,
In addition, a step of confirming the arrangement state of the insulating plate is required so that the case where the insulating plate is not inserted does not occur, and a step of correcting the arrangement state of the insulating plate is required. In order to temporarily fix the insulating plate to the bottom of the can, it is known to use an adhesive having a specific chemical structure.
Japanese Patent Application Laid-Open No. Hei 10-284046 proposes that a protrusion is provided on an insulating plate to prevent the displacement of the insulating plate. It did not improve the problems in the board insertion process.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、電池缶の底
部への絶縁板の挿入工程およびそれに伴う確認工程等も
不要として、しかも絶縁板の挿入と同等もしくはそれ以
上の効果を発揮する電池を提供することを課題とするも
のである。SUMMARY OF THE INVENTION The present invention eliminates the need for the step of inserting an insulating plate into the bottom of a battery can and the accompanying confirmation step, and at the same time, provides a battery that exhibits the same or better effects as the insertion of an insulating plate. It is an object to provide
【０００８】[0008]
【課題を解決するための手段】本発明は、非水電解液二
次電池において、正極電極、負極電極をセパレータを介
在させて積層したものを巻回して製造した電池要素の端
部と接触する電池缶底面に、液状の合成樹脂もしくは合
成樹脂前駆体を注入した後に硬化させた絶縁層を有する
非水電解液二次電池である。絶縁層が注入した合成樹脂
もしくは合成樹脂前駆体を加熱、輻射線の照射によって
硬化したものである前記の非水電解液二次電池である。SUMMARY OF THE INVENTION The present invention relates to a non-aqueous electrolyte secondary battery, which is in contact with the end of a battery element manufactured by winding a stack of a positive electrode and a negative electrode with a separator interposed therebetween. A non-aqueous electrolyte secondary battery having an insulating layer that is cured by injecting a liquid synthetic resin or a synthetic resin precursor into the bottom surface of a battery can. The above non-aqueous electrolyte secondary battery, wherein the synthetic resin or the synthetic resin precursor injected into the insulating layer is cured by heating and irradiating with a radiation.
【０００９】[0009]
【発明の実施の形態】本発明は、電池の組立工程におい
て、液体状の合成樹脂もしくは合成樹脂前駆体を注入し
た後に、加熱、輻射線の照射等によって硬化したので、
電池缶の缶底部への絶縁板の挿入工程を不要として電池
の製造工程を簡単とするとともに、絶縁板の挿入不良に
よる問題を解決したものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a liquid synthetic resin or a synthetic resin precursor is injected in a battery assembling process and then cured by heating, irradiation of radiation, or the like.
The present invention simplifies the battery manufacturing process by eliminating the step of inserting the insulating plate into the bottom of the battery can, and solves the problem caused by the poor insertion of the insulating plate.
【００１０】以下に、本発明を図面を参照して説明す
る。図１は、本発明の電池の一実施例を説明する図であ
り、電池要素を収納した角型電池の断面を説明する図で
ある。本発明の電池は、正極活物質を塗布した正極電極
１と、負極活物質を塗布した負極電極２をセパレータ３
を正極電極／セパレータ／負極電極／セパレータの順に
積層した電池要素４を角型電池缶５内に収容したもので
あり、電池缶底部には電池缶内に液状の組成物を注入す
ることによって作製した絶縁層６が形成されており、電
池要素の端面の電極が電池缶と接触して短絡が生じるこ
とを防止している。絶縁層として使用可能な合成樹脂と
しては、絶縁性があって電池の電解液に対して安定であ
り、電池特性に悪影響を与えないものであれば各種のも
のを挙げることができる。The present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining an embodiment of the battery of the present invention, and is a view for explaining a cross section of a prismatic battery containing battery elements. The battery of the present invention comprises a positive electrode 1 coated with a positive electrode active material and a negative electrode 2 coated with a negative electrode active material,
Are stacked in the order of a positive electrode / separator / negative electrode / separator and housed in a rectangular battery can 5, which is manufactured by injecting a liquid composition into the battery can at the bottom of the battery can. An insulating layer 6 is formed to prevent a short circuit from occurring when the electrode on the end face of the battery element contacts the battery can. As the synthetic resin that can be used as the insulating layer, various resins can be used as long as they are insulative, are stable with respect to the battery electrolyte, and do not adversely affect the battery characteristics.
【００１１】リチウムイオン電池等の非水電解液二次電
池には、一般に電解液の溶媒としては、エチレンカーボ
ネート、プロピレンカーボネート、ジメチルカーボネー
ト、メチルエチルカーボネート、γ−ブチロラクトン、
プロピオン酸メチル、プロピオン酸ブチル、プロピオン
酸エチル、スルホラン、１，２−ジメトキシエタン、
１，２−ジエトキシエタン、テトラヒドロフラン、１，
３−ジオキソラン、４−メチル−１，３−ジオキソラン
等の単独あるいは複数種を組み合わせたものが用いられ
ており、これらの有機溶剤とともに支持塩としてＬｉＣ
ｌＯ4、ＬｉＰＦ6、ＬｉＡｓＦ6、ＬｉＳｂＦ6、ＬｉＢ
Ｆ4、ＬｉＢ（Ｃ6Ｈ5）4、ＬｉＳＯ3ＣＦ3、ＬｉＮ（Ｓ
Ｏ2ＣＦ3）2、ＬｉＮ（ＳＯ2ＣＦ2ＣＦ3）等の単独ある
いは複数種を組み合わせた物が用いられている。In a non-aqueous electrolyte secondary battery such as a lithium ion battery, the solvent of the electrolyte is generally ethylene carbonate, propylene carbonate, dimethyl carbonate, methyl ethyl carbonate, γ-butyrolactone,
Methyl propionate, butyl propionate, ethyl propionate, sulfolane, 1,2-dimethoxyethane,
1,2-diethoxyethane, tetrahydrofuran, 1,
Those which are used alone or in combination of plural kinds such as 3-dioxolane, 4-methyl-1,3-dioxolane and the like are used together with these organic solvents as a supporting salt.
lO 4, LiPF 6, LiAsF 6 , LiSbF 6, LiB
F 4 , LiB (C 6 H 5 ) 4 , LiSO 3 CF 3 , LiN (S
O 2 CF 3) 2, LiN (SO 2 CF 2 CF 3) a combination of single or a plurality of types of the like is used.
【００１２】これらの電解液に対する安定性、および電
池特性への影響の点からは、加熱あるいは輻射線の照射
によって三次元的に硬化して、電解液に対して安定な物
質を形成するものであって、液状の合成樹脂もしくは合
成樹脂前駆体として電池缶底部に注入が可能な物質によ
って形成できる合成樹脂を用いることが好ましい。具体
的には、加熱によって硬化するフェノール樹脂、ポリエ
ステル樹脂、エポキシ樹脂、ジアリルフタレート樹脂、
シリコーン樹脂、ポリイミド樹脂や、紫外線などの輻射
線によって硬化するアクリレート系の光重合性プレポリ
マー、光重合性モノマー、光開始剤からなる輻射線硬化
性樹脂を挙げることができる。これらの樹脂形成組成物
の充填量は、硬化後に０．０５ｍｍないし０．２ｍｍの
厚みの絶縁層が形成される量とすることが好ましい。From the viewpoint of the stability to these electrolytes and the effect on the battery characteristics, a material which is three-dimensionally cured by heating or irradiation with radiation to form a stable material with respect to the electrolyte. It is preferable to use a liquid synthetic resin or a synthetic resin that can be formed from a substance that can be injected into the bottom of the battery can as a synthetic resin precursor. Specifically, a phenol resin, a polyester resin, an epoxy resin, a diallyl phthalate resin, which is cured by heating,
Examples of the radiation-curable resin include a silicone resin, a polyimide resin, and an acrylate-based photopolymerizable prepolymer, a photopolymerizable monomer, and a photoinitiator that are cured by radiation such as ultraviolet rays. The filling amount of these resin-forming compositions is preferably such that an insulating layer having a thickness of 0.05 mm to 0.2 mm is formed after curing.
【００１３】図２は、本発明の電池の製造工程を説明す
る図である。図２（Ａ）に示すように、十分に洗浄した
角型電池缶５内に、絶縁層形成用組成物７をシリンジ８
によって所定量を注入した後に、図２（Ｂ）に示すよう
に、電池缶の外部を加熱９したり、あるいは電池缶の上
部から紫外線等の輻射線１０を照射して電池缶底部に合
成樹脂からなる絶縁層６を形成するものである。紫外線
硬化樹脂を用いる場合には、シリンジによって缶底部へ
の滴下を行った後に、１０〜３０秒間の紫外線を照射す
ることによって硬化させることができる。FIG. 2 is a view for explaining a manufacturing process of the battery of the present invention. As shown in FIG. 2 (A), a composition 8 for forming an insulating layer is placed in a syringe 8 in a well-washed prismatic battery can 5.
After a predetermined amount is injected, as shown in FIG. 2 (B), the outside of the battery can is heated 9 or the bottom of the battery can is irradiated with radiant rays 10 such as ultraviolet rays from the upper portion of the battery can to form a synthetic resin on the bottom of the battery can. The insulating layer 6 is formed. When an ultraviolet curable resin is used, it can be cured by irradiating ultraviolet rays for 10 to 30 seconds after dropping the resin onto the bottom of the can with a syringe.
【００１４】また、紫外線硬化樹脂の滴下量は、電池の
大きさによって異なるが、電池缶の幅方向の内寸が２
８．９ｍｍ、厚さ方向の内寸が５．３４ｍｍの電池缶の
場合には、０．０７７〜０．０３ｍｌを滴下することに
よって０．０５ｍｍ〜０．２ｍｍの厚みの膜を形成する
ことができる。このようにして得られた電池缶内に従来
と同様に電池要素を収納して電池を製造することができ
る。樹脂の缶底部への滴下および硬化は、電池缶の製造
工程あるいは電池の組立工程のいずれにおいても、電池
缶の内部を洗浄した後であれば実施することができる。The amount of the ultraviolet curable resin dropped depends on the size of the battery.
In the case of a battery can having a thickness of 8.9 mm and an inner dimension in the thickness direction of 5.34 mm, a film having a thickness of 0.05 mm to 0.2 mm can be formed by dropping 0.077 to 0.03 ml. it can. A battery can be manufactured by housing the battery element in the battery can thus obtained in the same manner as in the related art. The dropping and curing of the resin on the bottom of the can can be performed in any of the battery can manufacturing process and the battery assembling process after cleaning the inside of the battery can.
【００１５】[0015]
【発明の効果】電池缶の底部と電池要素の端面との接触
による短絡を、絶縁板を挿入することなく防止すること
ができるので、電池の製造工程が簡単となり、また絶縁
板の挿入不良、絶縁板の挿入の欠落等の問題も防止する
ことが可能となる。According to the present invention, a short circuit caused by contact between the bottom of the battery can and the end face of the battery element can be prevented without inserting the insulating plate. Problems such as lack of insertion of the insulating plate can be prevented.
【図１】図１は、本発明の電池の一実施例を説明する図
である。FIG. 1 is a diagram illustrating one embodiment of a battery of the present invention.
【図２】図２は、本発明の電池の製造工程を説明する図
である。FIG. 2 is a diagram illustrating a manufacturing process of the battery of the present invention.
【図３】図３は、従来の電池の組立工程を説明する図で
ある。FIG. 3 is a diagram for explaining a conventional battery assembling process.
１…正極電極、２…負極電極、３…セパレータ、４…電
池要素、５…角型電池缶、６…絶縁層、７…絶縁層形成
用組成物、８…シリンジ、９…加熱、１０…輻射線、１
１…円筒型電池缶、１２…絶縁板DESCRIPTION OF SYMBOLS 1 ... Positive electrode, 2 ... Negative electrode, 3 ... Separator, 4 ... Battery element, 5 ... Square battery can, 6 ... Insulating layer, 7 ... Composition for forming an insulating layer, 8 ... Syringe, 9 ... Heating, 10 ... Radiation, 1
1: cylindrical battery can, 12: insulating plate
Claims (1)
極、負極電極をセパレータを介在させて積層したものを
巻回して製造した電池要素の端部と接触する電池缶底面
に、液状の合成樹脂もしくは合成樹脂前駆体を注入した
後に硬化させた絶縁層を有することを特徴とする非水電
解液二次電池。In a non-aqueous electrolyte secondary battery, a liquid composite is formed on the bottom surface of a battery can in contact with an end of a battery element manufactured by winding a positive electrode and a negative electrode laminated with a separator interposed therebetween. A non-aqueous electrolyte secondary battery comprising an insulating layer cured after injecting a resin or a synthetic resin precursor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30665199A JP2001126767A (en) | 1999-10-28 | 1999-10-28 | Nonaqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30665199A JP2001126767A (en) | 1999-10-28 | 1999-10-28 | Nonaqueous electrolyte secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001126767A true JP2001126767A (en) | 2001-05-11 |
Family
ID=17959686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30665199A Withdrawn JP2001126767A (en) | 1999-10-28 | 1999-10-28 | Nonaqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001126767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140182895A1 (en) * | 2012-12-31 | 2014-07-03 | Samsung Electro-Mechanics Co., Ltd. | Multilayered substrate and method of manufacturing the same |
-
1999
- 1999-10-28 JP JP30665199A patent/JP2001126767A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140182895A1 (en) * | 2012-12-31 | 2014-07-03 | Samsung Electro-Mechanics Co., Ltd. | Multilayered substrate and method of manufacturing the same |
| US9307632B2 (en) * | 2012-12-31 | 2016-04-05 | Samsung Electro-Mechanics Co., Ltd. | Multilayered substrate and method of manufacturing the same |
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