JP2001210304A - Sealed type battery and its manufacturing method - Google Patents
Sealed type battery and its manufacturing methodInfo
- Publication number
- JP2001210304A JP2001210304A JP2000018258A JP2000018258A JP2001210304A JP 2001210304 A JP2001210304 A JP 2001210304A JP 2000018258 A JP2000018258 A JP 2000018258A JP 2000018258 A JP2000018258 A JP 2000018258A JP 2001210304 A JP2001210304 A JP 2001210304A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- battery
- current collector
- positive electrode
- material layer
- 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.)
- Granted
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
Landscapes
- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、密閉型電池に関
し、電池内部の無効な空間を減少させるともに、組立を
容易とした密閉型電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery, and more particularly, to a sealed battery capable of reducing an ineffective space inside the battery and facilitating assembly.
【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が用い
られており、高容量のリチウム電池やリチウムイオン二
次電池等の非水電解液電池が用いられている。2. Description of the Related Art Various types of batteries are used as power supplies for small electronic devices, and small, large-capacity sealed batteries are used as power supplies for mobile phones, notebook computers, camcorders, and the like. Non-aqueous electrolyte batteries such as lithium batteries and lithium ion secondary batteries have been used.
【０００３】機器の小型化に対応して、円筒型電池に加
えて、小さな空間を有効に利用することができる角型の
密閉式電池がひろく用いられている。角型電池において
は、電池の一方の電極として作用する電池缶と絶縁性部
材によって隔離した電極端子が取り付けられている。[0003] In response to miniaturization of equipment, in addition to cylindrical batteries, rectangular sealed batteries that can effectively use a small space are widely used. In a prismatic battery, an electrode terminal separated by an insulating member from a battery can acting as one electrode of the battery is attached.
【０００４】従来の密閉型電池の一例を図面を参照して
説明する。図５は、角型の密閉型電池の一例を説明する
図であり、図５（Ａ）は電池を縦方向に切断した断面を
説明する断面図であり、また図５（Ｂ）は、横方向に切
断した断面を説明する図である。密閉型電池１は、角筒
状の金属容器２（以下、電池缶とも称す）に、正極電極
板３と負極電極板４をセパレータ５を介して積層したも
のを巻回した電池要素６が収納されている。図４には、
電池缶２が負極端子を兼ねた電池について説明する。電
池缶２の電池ヘッダー７に絶縁体を介して取り付けた正
極端子８には、正極電極板３に結合した正極タブ９が接
合されている。また、負極電極板４に結合した負極タブ
１０は電池缶２の内面に接合されている。An example of a conventional sealed battery will be described with reference to the drawings. 5A and 5B are diagrams illustrating an example of a rectangular sealed battery, FIG. 5A is a cross-sectional view illustrating a cross section of the battery cut in a vertical direction, and FIG. It is a figure explaining the section cut in the direction. The sealed battery 1 contains a battery element 6 formed by winding a stack of a positive electrode plate 3 and a negative electrode plate 4 in a rectangular cylindrical metal container 2 (hereinafter also referred to as a battery can) with a separator 5 interposed therebetween. Have been. In FIG.
A battery in which the battery can 2 also serves as the negative electrode terminal will be described. A positive electrode tab 8 attached to the positive electrode plate 3 is joined to a positive terminal 8 attached to the battery header 7 of the battery can 2 via an insulator. Further, the negative electrode tab 10 bonded to the negative electrode plate 4 is joined to the inner surface of the battery can 2.
【０００５】ところが、このような電池にあっては、正
極タブ９および負極タブ１０が、正極電極板３および負
極電極板４の集電体面に接合されているために、正極電
極板および負極電極板をセパレータ５を介して積層して
巻回して電池要素６を作製した場合には、これらのタブ
を取り付けた部分の近傍で歪みが生じることとなり、電
池の充放電時に充放電反応が不均一となる。例えば、過
大な電流が流れて温度が上昇した場合に、セパレータの
微細孔を塞いで電池反応を停止される動作も不確実なも
のとなるという問題点を有していた。また、正極タブお
よび負極タブの取り付けのために、電池缶内に無効な空
間を生じるという問題点があった。これらの問題は、と
くに小型の電池ほど大きなものであった。However, in such a battery, since the positive electrode tab 9 and the negative electrode tab 10 are joined to the current collector surfaces of the positive electrode plate 3 and the negative electrode plate 4, the positive electrode plate and the negative electrode When the battery element 6 is manufactured by laminating and winding the plates with the separator 5 interposed therebetween, distortion occurs near the portion where these tabs are attached, and the charge / discharge reaction during charging / discharging of the battery becomes uneven. Becomes For example, when an excessive current flows and the temperature rises, there is a problem that the operation of closing the micropores of the separator and stopping the battery reaction becomes uncertain. Further, there is a problem that an invalid space is generated in the battery can due to the attachment of the positive electrode tab and the negative electrode tab. These problems were particularly significant for smaller batteries.
【０００６】また、大容量の電池においては、タブの部
分での損失が大きくなるので、大きな充放電電流に対応
し多数のタブを電流が均一となるように配置する必要が
あるが、多数のタブを使用した場合には複数のタブ間で
の電流の損失が不均一となり一部の電極タブが通電電流
で発熱するという問題があり、またそれぞれのタブの接
合部分の近傍とタブの接合部分から離れた部分では、電
流分布が不均一となるという問題もあり高率放電ができ
ないという問題があった。In a large-capacity battery, the loss at the tab portion becomes large. Therefore, it is necessary to arrange a large number of tabs so as to cope with a large charge / discharge current and to make the current uniform. When tabs are used, there is a problem that current loss among a plurality of tabs becomes nonuniform, and some electrode tabs generate heat due to an energized current. There is a problem that the current distribution becomes non-uniform in a portion away from the high-speed discharge, and there is a problem that high-rate discharge cannot be performed.
【０００７】そこで、巻回した電池要素の電極の端面に
集電部材を溶接することが特開平７−６７４９号公報、
特開平９−３０６４６５号公報等において提案されてい
るが、溶接電流を集電体の突起部に集中させるものであ
るが、接合可能な電極はニッケル等のスポット溶接可能
な基材を使用したものに限られており、また反対側の極
性の電極板との電気的接触を防止する方法が示されてお
らず、リチウムイオン電池のような、厚みが薄い金属集
電体を用いた電池においては、電気的接触の防止の点で
は不充分なものであった。Therefore, welding a current collecting member to an end face of an electrode of a wound battery element is disclosed in Japanese Patent Laid-Open No. 7-6749.
Japanese Patent Application Laid-Open No. 9-306465 proposes that the welding current is concentrated on the projections of the current collector, but the electrode that can be joined uses a spot-weldable base material such as nickel. In addition, there is no method to prevent electrical contact with the opposite polarity electrode plate, and in a battery using a thin metal current collector, such as a lithium ion battery, there is no description. However, it was insufficient in terms of preventing electrical contact.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、電池内部の
無効な空間をなくし、容積当たりの容量が大きな電池を
提供することを課題とするものであり、また電池要素と
導電端子を接続するタブをなくすことによって電池の構
造を簡単にし組立を容易にすることを課題とするもので
ある。また、巻回して作製した電池要素の歪みをなく
し、セパレータの部細孔が塞がれる温度を均一化し、電
池反応の停止性能を向上させることを課題とするもので
あり、大容量の電池においても安定した特性の電池を提
供することを課題とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery having a large capacity per volume by eliminating a dead space inside the battery and connecting a battery element and a conductive terminal. It is an object of the present invention to simplify the structure of a battery and facilitate assembly by eliminating tabs. Another object of the present invention is to eliminate the distortion of the battery element produced by winding, to equalize the temperature at which the pores of the separator are closed, and to improve the performance of stopping the battery reaction. It is another object of the present invention to provide a battery having stable characteristics.
【０００９】[0009]
【課題を解決するための手段】本発明は、正極電極板お
よび負極電極板をセパレータを介して積層したものを巻
回した電池要素を有する密閉型電池において、一方の極
性の電極板を構成する集電体の巻回軸方向の一方の端部
は、端面を含めて絶縁性物質層で被覆されており、対向
する他方の極性の電極板の集電体の巻回軸方向の端部は
電池要素の端面に平行に配置された集電板に導電接続さ
れている密閉型電池に解決することができる。また、一
方の極性の電極板を構成する集電体の巻回軸方向の他方
の端部は、集電板に接合されているとともに、集電体の
電極活物質層に隣接する部分に絶縁性物質層が形成され
た前記の密閉型電池である。また、集電体に形成する絶
縁性物質層は、電極活物質と同時に集電体上に塗布した
後に圧縮することによって端面を被覆したものである前
記の密閉型電池である。また、絶縁性物質層は、電池活
物質の構成材料に含まれる結合剤によって構成された電
池電極板の活物質層と同じ厚さの層である前記の密閉型
電池である。また、一方の集電体の一方の端部は、電池
缶の底部に位置する前記の密閉型電池である。また、一
方の極性の電極板は正極である前記の密閉型電池であ
る。また、リチウムイオン電池である前記の密閉型電池
である。SUMMARY OF THE INVENTION The present invention constitutes an electrode plate of one polarity in a sealed battery having a battery element in which a positive electrode plate and a negative electrode plate are laminated with a separator interposed therebetween and wound. One end of the current collector in the winding axis direction is covered with an insulating material layer including the end face, and the other end of the current collector of the opposite polarity electrode plate in the winding axis direction is The present invention can solve the problem of a sealed battery which is conductively connected to a current collector plate arranged in parallel with the end face of the battery element. The other end of the current collector constituting the electrode plate of one polarity in the winding axis direction is joined to the current collector plate and is insulated at a portion adjacent to the electrode active material layer of the current collector. It is the above-mentioned sealed battery in which a conductive material layer is formed. In addition, the insulating material layer formed on the current collector is the above-mentioned sealed battery in which the end face is covered by being applied on the current collector simultaneously with the electrode active material and then compressed. The insulating material layer is the above-described sealed battery in which the thickness of the active material layer of the battery electrode plate is the same as that of the battery electrode plate formed of the binder contained in the constituent material of the battery active material. One end of one current collector is the above sealed battery located at the bottom of the battery can. Further, the electrode plate having one polarity is the above-mentioned sealed battery which is a positive electrode. Further, the above sealed battery is a lithium ion battery.
【００１０】また、正極電極板および負極電極板をセパ
レータを介して積層したものを巻回した電池要素を有す
る密閉型電池の製造方法において、一方の集電体上に、
電極活物質層に隣接して絶縁性物質層を同時に形成した
後に、絶縁性物質層の端部を圧縮ロールによって圧縮処
理し、集電体の端面を絶縁性物質層によって被覆するこ
とによって形成した一方の極性の電極板をセパレータを
介して対向する電極板と積層した後に巻回して製造した
電池要素の他方の電極板の集電体の端部を電池要素の端
面に平行に配置された集電体に直接的に導電接続する密
閉型電池の製造方法である。[0010] In a method of manufacturing a sealed battery having a battery element in which a positive electrode plate and a negative electrode plate are laminated with a separator interposed therebetween, the method comprises the steps of:
After simultaneously forming the insulating material layer adjacent to the electrode active material layer, the insulating material layer was formed by compressing an end portion of the insulating material layer with a compression roll and covering the end face of the current collector with the insulating material layer. The end of the current collector of the other electrode plate of a battery element manufactured by laminating an electrode plate of one polarity and an electrode plate facing each other with a separator interposed therebetween is disposed in parallel with the end face of the battery element. This is a method for manufacturing a sealed battery that is directly conductively connected to an electric body.
【００１１】[0011]
【発明の実施の形態】本発明の密閉型電池は、正極電極
板および負極電極板をセパレータを介して積層したもの
を巻回した電池要素を有する密閉型電池において、電池
要素の巻回軸方向の端面および端部に位置する電極板の
集電体と集電板を接合した際に、一方の電極板と他方の
電極板あるいは集電板との導電接触を防止した製造が容
易で性能が安定した電池を提供するものである。BEST MODE FOR CARRYING OUT THE INVENTION A sealed battery according to the present invention is a sealed battery having a battery element in which a positive electrode plate and a negative electrode plate are laminated with a separator interposed therebetween. When the current collector of the electrode plate located at the end face and the end of the current collector is joined to the current collector, it is easy to manufacture by preventing conductive contact between one electrode plate and the other electrode plate or the current collector plate, and the performance is improved. It is intended to provide a stable battery.
【００１２】以下に図面を参照して本発明を説明する。
図１は、本発明の密閉型電池を説明する図であり、電池
の中心軸に方向に切断した断面図である。本発明の密閉
型電池１は、電池缶２内に、正極電極板３と負極電極板
４をセパレータ５を介して積層したものを巻回した電池
要素６が収納されており、電池缶２は、負極端子を兼ね
たものである。The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a sealed battery according to the present invention, and is a cross-sectional view taken along a central axis of the battery. In a sealed battery 1 of the present invention, a battery element 6 in which a positive electrode plate 3 and a negative electrode plate 4 are laminated with a separator 5 wound therein is housed in a battery can 2. , Also serving as a negative electrode terminal.
【００１３】正極電極板３は、帯状のアルミニウム箔の
金属箔からなる正極集電体１１の表面に、に、ＬｉxＭ
Ｏ2（ただしＭは、少なくとも一種の遷移金属を表
す。）である複合酸化物、例えば、ＬｉxＣｏＯ2、Ｌｉ
xＮｉＯ2、ＬｉxＭｎ2Ｏ4、ＬｉxＭｎＯ3、ＬｉxＮｉy
Ｃｏ(1-y)Ｏ2などを 、カーボンブラック等の導電性物
質、ポリフッ化ビニリデン（ＰＶＤＦ）等の結着剤をＮ
−メチル−２−ピロリドン（ＮＭＰ）等の溶剤とを分散
混練した調製した正極塗料を塗布することによって製造
される。The positive electrode plate 3 is provided on a surface of a positive electrode current collector 11 made of a metal foil of a belt-like aluminum foil with Li x M
O 2 (where M represents at least one transition metal), such as Li x CoO 2 or Li
x NiO 2 , Li x Mn 2 O 4 , Li x MnO 3 , Li x Ni y
Co (1-y ) O 2 or the like; a conductive substance such as carbon black; a binder such as polyvinylidene fluoride (PVDF);
-Methyl-2-pyrrolidone (NMP) is manufactured by applying a prepared positive electrode paint which is dispersed and kneaded with a solvent such as NMP.
【００１４】また、負極電極板４は、帯状の銅箔等の負
極集電体１２の表面に、リチウムをドープ及び脱ドープ
可能な、熱分解炭素類、ピッチコークス、ニードルコー
クス、石油コークスなどのコークス類、グラファイト
類、ガラス状炭素類、フェノール樹脂、フラン樹脂など
を焼成した有機高分子化合物焼成体、炭素繊維、活性炭
などの炭素質材料、ポリアセチレン、ポリピロール等の
導電性高分子材料、あるいは金属リチウム、リチウム−
アルミ合金等のリチウム合金をカーボンブラックなどの
導電性物質、ポリフッ化ビニリデン（ＰＶＤＦ）等の結
着剤をＮ−メチル−２−ピロリドン（ＮＭＰ）等の溶剤
とを分散混練した調製した負極塗布液を塗布することに
よって製造される。The negative electrode plate 4 is provided on the surface of a negative electrode current collector 12 such as a strip-shaped copper foil, which is capable of doping and dedoping lithium, such as pyrolytic carbon, pitch coke, needle coke, petroleum coke and the like. Organic polymer compound fired bodies obtained by firing cokes, graphites, glassy carbons, phenolic resins, furan resins, etc .; carbonaceous materials such as carbon fibers and activated carbon; conductive polymer materials such as polyacetylene and polypyrrole; or metals Lithium, lithium-
A negative electrode coating solution prepared by dispersing and kneading a lithium alloy such as an aluminum alloy with a conductive material such as carbon black and a binder such as polyvinylidene fluoride (PVDF) with a solvent such as N-methyl-2-pyrrolidone (NMP). It is manufactured by applying.
【００１５】正極集電体１１の正極集電板１３に接合さ
れる部分と反対側の端部は、正極活物質層１４に接して
絶縁性物質層１５が被覆されている。絶縁性物質層１５
は、各種の材料を用いて製造することができるが、とく
に正極電極の作製に用いる正極塗布液に使用するポリフ
ッ化ビニリデン等の結着剤は、正極電極板の正極活物質
層および正極集電体のいずれとの親和性が良好であるの
で好ましい。An end portion of the positive electrode current collector 11 opposite to a portion joined to the positive electrode current collector plate 13 is in contact with the positive electrode active material layer 14 and is covered with an insulating material layer 15. Insulating material layer 15
Can be manufactured using various materials, and in particular, a binder such as polyvinylidene fluoride used in a positive electrode coating solution used for manufacturing a positive electrode is made of a positive electrode active material layer of a positive electrode plate and a positive electrode current collector. It is preferred because it has good affinity with any of the bodies.
【００１６】また、負極電極板４の負極集電体１６の端
部は、負極集電板１７へ接合される。負極集電体１６の
端部と負極集電板１７との接合は、超音波溶接、抵抗溶
接等によって行うことができる。正極電極板３の端部の
正極集電体１１は、絶縁性物質層１５によって被覆され
ているので、負極集電体１６が折れ曲がっても正極電極
板３あるいは正極集電体１１に接触して短絡を起こすこ
とはない。また、正極集電体１１の正極集電板１３に接
合される側には、正極電極板３の正極活物質層１４に隣
接した正極集電体１１に絶縁性物質層１５が形成されて
おり、正極集電板１３は、絶縁性部材１８を介して電池
ヘッダー１９に取り付けられて正極端子として作用す
る。正極集電体１１と正極集電板１３との接合は超音波
溶接等によって行うことができる。The end of the negative electrode current collector 16 of the negative electrode plate 4 is joined to the negative electrode current collector 17. The joining between the end of the negative electrode current collector 16 and the negative electrode current collector plate 17 can be performed by ultrasonic welding, resistance welding, or the like. Since the positive electrode current collector 11 at the end of the positive electrode plate 3 is covered with the insulating material layer 15, even if the negative electrode current collector 16 is bent, the positive electrode current collector 11 contacts the positive electrode plate 3 or the positive electrode current collector 11. No short circuit will occur. On the side of the positive electrode current collector 11 that is joined to the positive electrode current collector 13, an insulating material layer 15 is formed on the positive electrode current collector 11 adjacent to the positive electrode active material layer 14 of the positive electrode plate 3. The positive current collector 13 is attached to the battery header 19 via the insulating member 18 and functions as a positive terminal. Bonding between the positive electrode current collector 11 and the positive electrode current collector plate 13 can be performed by ultrasonic welding or the like.
【００１７】正極電極板３の正極活物質層１４の幅は、
対向する負極電極板の負極活物質層の幅よりも小さい
が、正極集電体１１の正極活物質層１４に隣接して絶縁
性物質層１５が形成されているいるので、正極電極の絶
縁性物質層で被覆された端部を負極電極と同じ幅とする
ことができるので、正極電極板の端部が安定した電池要
素を形成することができる。したがって、絶縁性物質層
で形成されていない集電体との短絡を防止することが可
能であるのみではなく、電池の落下等の際の大きな衝撃
を受けても、正極電極板、あるいは正極集電体が切断し
て部分が負極電極板と接触して短絡することを防止する
ことができる。The width of the positive electrode active material layer 14 of the positive electrode plate 3 is
Although the width is smaller than the width of the negative electrode active material layer of the opposite negative electrode plate, the insulating material layer 15 is formed adjacent to the positive electrode active material layer 14 of the positive electrode current collector 11. Since the end covered with the material layer can have the same width as the negative electrode, a battery element in which the end of the positive electrode plate is stable can be formed. Therefore, it is possible not only to prevent a short circuit with a current collector that is not formed of an insulating material layer, but also to prevent a positive electrode plate or a positive electrode collector from being subjected to a large impact such as when a battery is dropped. It is possible to prevent the electric body from being cut and short-circuited by contacting the portion with the negative electrode plate.
【００１８】図２は、本発明の密閉型電池に使用する絶
縁性物質層を形成した電極板の製造方法を説明する図で
ある。図２（Ａ）は塗布方法を説明する図であり、図２
（Ｂ）は図２（Ａ）のＡ−Ａ’線の断面図であり、図２
（Ｃ）は図２（Ａ）のＢ−Ｂ’線の断面図である。図２
（Ａ）において、帯状のアルミニウム箔からなる正極集
電体１１上に塗布装置２０からリチウム遷移金属複合酸
化化物等を結着剤中に分散した正極塗布液２１を連続的
に塗布するとともに、塗布装置の正極塗布液とは隔離板
２２によって区画した絶縁性物質層形成用塗布液２２を
同時に塗布することができ、正極活物質層１４に隣接し
た絶縁性物質層１５を正極活物質層と同時に形成するこ
とができる。一方の面に正極活物質層および絶縁性物質
層を形成した正極集電体は、他の面も同様に塗布した後
に所定の大きさに裁断する。FIG. 2 is a view for explaining a method of manufacturing an electrode plate provided with an insulating material layer used in the sealed battery of the present invention. FIG. 2A is a diagram for explaining a coating method.
2B is a cross-sectional view taken along line AA ′ of FIG.
FIG. 2C is a cross-sectional view taken along line BB ′ of FIG. FIG.
In (A), a positive electrode coating solution 21 in which a lithium-transition metal composite oxide or the like is dispersed in a binder is continuously applied from a coating device 20 onto a positive electrode current collector 11 made of a strip-shaped aluminum foil, and the coating is performed. The coating liquid for forming an insulating material layer 22 separated by the separator 22 can be applied simultaneously with the positive electrode coating liquid of the device, and the insulating material layer 15 adjacent to the positive electrode active material layer 14 is simultaneously coated with the positive electrode active material layer. Can be formed. A positive electrode current collector having a positive electrode active material layer and an insulating material layer formed on one surface is similarly coated on the other surface and then cut into a predetermined size.
【００１９】図２は、帯状の集電体面に一つの活物質層
を塗布する例について説明したが、同時に複数の活物質
層を形成した後に裁断しても良い。図３は、一度に複数
の本発明の電極板を作製する方法を説明する図であり、
２個の帯状電極を同時に作製する方法を説明する図であ
る。帯状のアルミニウム箔からなる正極集電体１１上に
リチウム遷移金属複合酸化化物等を結着剤中に分散した
正極塗布液、絶縁性物質層形成用塗布液を同時に塗布
し、複数の正極活物質層１４と、それに隣接した絶縁性
物質層１５を正極活物質層と同時に形成する。一方の面
に正極活物質層および絶縁性物質層を形成した正極集電
体は、他の面も同様に塗布し、正極集電体面に対称な正
極活物質層および絶縁性物質層を形成する。次いで、切
断部位２４で切断することによって、正極電極板の一方
の端部には集電体のアルミニウム箔の露出面、絶縁性物
質層、正極活物質層の順で形成され、他方は、絶縁性物
質層、正極活物質層の順で形成された２個の帯状の正極
電極板を作製することができる。FIG. 2 illustrates an example in which one active material layer is applied to the belt-shaped current collector surface. However, a plurality of active material layers may be simultaneously formed and then cut. FIG. 3 is a diagram illustrating a method for producing a plurality of electrode plates of the present invention at one time,
It is a figure explaining the method of simultaneously manufacturing two strip electrodes. A positive electrode coating liquid in which a lithium-transition metal composite oxide or the like is dispersed in a binder and a coating liquid for forming an insulating material layer are simultaneously coated on a positive electrode current collector 11 made of a belt-shaped aluminum foil, and a plurality of positive electrode active materials are formed. The layer 14 and the insulating material layer 15 adjacent thereto are formed simultaneously with the positive electrode active material layer. The positive electrode current collector having the positive electrode active material layer and the insulating material layer formed on one surface is coated in the same manner on the other surface to form a symmetrical positive electrode active material layer and an insulating material layer on the positive electrode current collector surface. . Next, by cutting at the cut portion 24, an exposed surface of the aluminum foil of the current collector, an insulating material layer, and a positive electrode active material layer are formed in this order on one end of the positive electrode plate, and the other is insulated. Thus, two strip-shaped positive electrode plates formed in the order of the active material layer and the positive electrode active material layer can be manufactured.
【００２０】図４は、絶縁性物質層を形成した電極板の
後処理方法を説明する図であり、断面図である。図４
（Ａ）で示すように正極電極板３を、絶縁性物質層１５
の所定の切断部位２４で切断した後に、図３（Ｂ）に示
すように絶縁性物質層１５の先端部分からロール２５で
圧縮する。圧縮されると、図３（Ｃ）に示すように絶縁
性物質層１５は、正極集電体端面２６よりも延びて正極
集電体１１を完全に被覆される。正極集電体の絶縁性物
質層の処理は、絶縁性物質層の圧縮処理の工程として単
独で行っても良いが、正極電極板の製造工程において一
般に行われている正極活物質層を塗布し乾燥した後に、
正極電極板をローラーによる圧縮処理工程と同時に行っ
ても良い。FIG. 4 is a sectional view for explaining a post-processing method of the electrode plate on which the insulating material layer is formed. FIG.
As shown in (A), the positive electrode plate 3 is placed on the insulating material layer 15.
After cutting at a predetermined cutting portion 24, the tip of the insulating material layer 15 is compressed by a roll 25 as shown in FIG. When compressed, the insulating material layer 15 extends beyond the positive electrode current collector end face 26 and completely covers the positive electrode current collector 11, as shown in FIG. The treatment of the insulating material layer of the positive electrode current collector may be performed alone as a step of compressing the insulating material layer. However, the treatment of the positive electrode active material layer generally performed in the production process of the positive electrode plate may be performed. After drying,
The positive electrode plate may be performed simultaneously with the compression treatment step using a roller.
【００２１】以上の図１ないし図４の説明では、一方の
電極板が正極電極板である場合について説明したが、一
方の電極板が負極電極板である電池であっても良く、電
池缶が正極端子を兼ねた電池であっても良い。In the above description of FIGS. 1 to 4, the case where one electrode plate is a positive electrode plate has been described. However, a battery in which one electrode plate is a negative electrode plate may be used. A battery that also serves as the positive electrode terminal may be used.
【００２２】また、本発明の電池の電池要素は、端面を
熱融着した２枚のセパレータの間に負極電極板の集電体
の幅方向の端部がセパレータの端部よりも０．１〜０．
６ｍｍ飛び出すように配置し、負極電極板上の他の１枚
のセパレータの上面に正極電極板を幅方向の端部のアル
ミニウム箔の集電体が露出した部分が、負極電極板の集
電体が飛び出した側とは互いに反対方向に位置させて、
セパレータの端部よりも負極電極集電体の露出面がセパ
レータの端部よりも０．１〜０．６ｍｍ飛び出すように
位置させて負極電極板が外側となるように巻き取り装置
によって所定の回数を巻回した後にほぐれ防止の粘着テ
ープ等によって固定することによって製造することがで
きる。Further, in the battery element of the battery according to the present invention, the widthwise end of the current collector of the negative electrode plate is located between the two separators whose end surfaces are thermally fused with each other by 0.1%. ~ 0.
The current collector of the negative electrode plate is arranged such that the current collector of the aluminum foil at the end in the width direction of the positive electrode plate is exposed on the upper surface of another separator on the negative electrode plate. Is located in the opposite direction to the side from which
A predetermined number of times by a winding device such that the exposed surface of the negative electrode current collector protrudes from the end of the separator by 0.1 to 0.6 mm from the end of the separator so that the negative electrode plate is outside. Can be manufactured by winding with a pressure-sensitive adhesive tape or the like for preventing loosening.
【００２３】このようにして得られた電池要素は、集電
板に抵抗溶接、超音波溶接等の手段によって溶接するこ
とによって電池を製造することができる。本発明の密閉
型電池においては、電極活物質層に隣接して絶縁性物質
層が形成されているので、溶接時に電池要素の端面が加
圧された場合であっても、集電体の金属箔が対極の活物
質層と接触して短絡することが防止することができる。The battery element thus obtained can be manufactured by welding the current collector plate to the current collector plate by means such as resistance welding or ultrasonic welding. In the sealed battery of the present invention, since the insulating material layer is formed adjacent to the electrode active material layer, even if the end face of the battery element is pressed during welding, the metal It is possible to prevent the foil from coming into contact with the counter electrode active material layer and causing a short circuit.
【００２４】[0024]
【発明の効果】本発明の密閉型電池は、一方の電極板の
集電体の巻回軸方向の端面に絶縁性物質層を形成したの
で、他方の電極板の集電体の巻回軸方向の端面を集電板
に直接に導電接続を形成した場合には、他方の電極板の
集電体と一方の電極あるいは集電体が短絡することを防
止することができ、また電池要素とをタブを用いること
なく導電接続を行うことができ、電池缶内の無効な空間
を減少させるとともに、電気的特性が良好な密閉型電池
を得ることができる。According to the sealed battery of the present invention, since the insulating material layer is formed on the end face of the current collector of one electrode plate in the winding axis direction, the winding axis of the current collector of the other electrode plate is formed. In the case where the end face in the direction is formed directly with the conductive connection to the current collector plate, it is possible to prevent the current collector of the other electrode plate from short-circuiting to one electrode or the current collector, The conductive connection can be performed without using a tab, and an ineffective space in the battery can is reduced, and a sealed battery having good electric characteristics can be obtained.
【図１】図１は、本発明の密閉型電池を説明する図であ
る。FIG. 1 is a diagram illustrating a sealed battery according to the present invention.
【図２】図２は、本発明の密閉型電池に使用する絶縁性
物質層を形成した電極板の製造方法を説明する図であ
る。FIG. 2 is a diagram illustrating a method for manufacturing an electrode plate having an insulating material layer formed thereon for use in a sealed battery according to the present invention.
【図３】図３は、一度に複数の本発明の電極板を作製す
る方法を説明する図である。FIG. 3 is a diagram illustrating a method for producing a plurality of electrode plates of the present invention at one time.
【図４】図４は、絶縁性物質層を形成した電極板の後処
理方法を説明する図であり、断面図である。FIG. 4 is a cross-sectional view for explaining a post-processing method of the electrode plate on which the insulating material layer is formed.
【図５】図５は、角型の密閉型電池の一例を説明する図
である。FIG. 5 is a diagram illustrating an example of a rectangular sealed battery.
１…密閉型電池、２…電池缶、３…正極電極板、４…負
極電極板、５…セパレータ、６…電池要素、７…電池ヘ
ッダー、８…正極端子、９…正極タブ、１０…負極タ
ブ、１１…正極集電体、１２…負極集電体、１３…正極
集電板、１４…正極活物質層、１５…絶縁性物質層、１
６…負極集電体、１７…負極集電板、１８…絶縁性部
材、１９…電池ヘッダー、２０…塗布装置、２９…正極
塗布液、２２…隔離板、２３…絶縁性物質層形成用塗布
液、２４…切断部位、２５…ロール、２６…正極集電体
端面DESCRIPTION OF SYMBOLS 1 ... Sealed battery, 2 ... Battery can, 3 ... Positive electrode plate, 4 ... Negative electrode plate, 5 ... Separator, 6 ... Battery element, 7 ... Battery header, 8 ... Positive terminal, 9 ... Positive tab, 10 ... Negative electrode Tabs, 11: positive electrode current collector, 12: negative electrode current collector, 13: positive electrode current collector plate, 14: positive electrode active material layer, 15: insulating material layer, 1
Reference numeral 6: negative electrode current collector, 17: negative electrode current collector plate, 18: insulating member, 19: battery header, 20: coating device, 29: positive electrode coating solution, 22: separator, 23: coating for forming insulating material layer Liquid, 24: Cutting site, 25: Roll, 26: End face of positive electrode current collector
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H017 AA03 AS08 BB06 BB08 BB11 BB14 BB15 BB19 CC01 DD03 DD05 DD06 EE05 EE07 HH05 5H022 AA09 AA18 BB02 BB16 BB17 BB25 CC08 CC12 CC13 CC15 CC16 CC23 CC30 EE04 5H028 AA01 AA05 BB01 BB04 BB05 BB07 BB17 CC05 CC08 CC10 CC12 CC24 CC26 EE01 5H029 AJ01 AK03 AL07 AL08 AL12 AL16 BJ02 BJ14 CJ03 CJ05 CJ06 CJ07 CJ22 CJ30 DJ04 DJ05 DJ07 DJ08 EJ01 HJ12 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) BB17 CC05 CC08 CC10 CC12 CC24 CC26 EE01 5H029 AJ01 AK03 AL07 AL08 AL12 AL16 BJ02 BJ14 CJ03 CJ05 CJ06 CJ07 CJ22 CJ30 DJ04 DJ05 DJ07 DJ08 EJ01 HJ12
Claims (2)
タを介して積層したものを巻回した電池要素を有する密
閉型電池において、一方の極性の電極板を構成する集電
体の巻回軸方向の一方の端部は端面を含めて絶縁性物質
層で被覆されており、対向する他方の極性の電極板の集
電体の端部は電池要素の端面に平行に配置された集電板
に直接的に導電接続されていることを特徴とする密閉型
電池。In a sealed battery having a battery element in which a positive electrode plate and a negative electrode plate are laminated with a separator interposed therebetween, a winding axis direction of a current collector constituting an electrode plate having one polarity is provided. Is coated with an insulating material layer including the end face, and the end of the current collector of the other opposite electrode plate is connected to a current collector plate arranged in parallel with the end face of the battery element. A sealed battery characterized by being directly conductively connected.
タを介して積層したものを巻回した電池要素を有する密
閉型電池の製造方法において、一方の集電体上に、電極
活物質層に隣接して絶縁性物質層を同時に形成した後
に、絶縁性物質層の端部を圧縮ロールによって圧縮処理
し、集電体の端面を絶縁性物質層によって被覆すること
によって形成した一方の極性の電極板をセパレータを介
して対向する電極板と積層した後に巻回して製造した電
池要素の他方の電極板の集電体の端部を電池要素の端面
に平行に配置された集電体に直接的に導電接続すること
を特徴とする密閉型電池の製造方法。2. A method for manufacturing a sealed battery having a battery element in which a positive electrode plate and a negative electrode plate are laminated with a separator interposed therebetween, the method comprising the steps of: After forming the insulating material layer at the same time, an end of the insulating material layer is compressed by a compression roll, and one end of the electrode plate is formed by covering the end face of the current collector with the insulating material layer. The end of the current collector of the other electrode plate of the battery element manufactured by laminating and then winding the opposite electrode plate via a separator directly to the current collector arranged in parallel to the end face of the battery element A method for manufacturing a sealed battery, wherein the sealed battery is electrically connected.
Priority Applications (1)
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|---|---|---|---|
| JP2000018258A JP3606554B2 (en) | 2000-01-27 | 2000-01-27 | Manufacturing method of sealed battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000018258A JP3606554B2 (en) | 2000-01-27 | 2000-01-27 | Manufacturing method of sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001210304A true JP2001210304A (en) | 2001-08-03 |
| JP3606554B2 JP3606554B2 (en) | 2005-01-05 |
Family
ID=18545129
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|---|---|---|---|
| JP2000018258A Expired - Lifetime JP3606554B2 (en) | 2000-01-27 | 2000-01-27 | Manufacturing method of sealed battery |
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| Country | Link |
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| JP (1) | JP3606554B2 (en) |
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