JPH097610A - Battery - Google Patents
BatteryInfo
- Publication number
- JPH097610A JPH097610A JP7174199A JP17419995A JPH097610A JP H097610 A JPH097610 A JP H097610A JP 7174199 A JP7174199 A JP 7174199A JP 17419995 A JP17419995 A JP 17419995A JP H097610 A JPH097610 A JP H097610A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- electrode
- positive electrode
- negative electrode
- battery
- 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.)
- Pending
Links
- 239000007774 positive electrode material Substances 0.000 claims abstract description 35
- 239000007773 negative electrode material Substances 0.000 claims abstract description 30
- 239000011149 active material Substances 0.000 claims abstract description 24
- 238000010030 laminating Methods 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 230000008021 deposition Effects 0.000 description 3
- 239000011888 foil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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]
【産業上の利用分野】本発明は、正極と負極をセパレー
タを介して対向させこれを九十九折り状に積層した電極
体を用いる電池に係り、特に電池の小型化や高エネルギ
ー密度化することが可能な電極体を用いた電池に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery using an electrode body in which a positive electrode and a negative electrode are opposed to each other via a separator and are stacked in a zigzag shape, and particularly, the battery is downsized and the energy density is increased. The present invention relates to a battery using an electrode body capable of performing the above.
【０００２】[0002]
【従来の技術】近年、携帯用移動端末機器等の需要か
ら、扁平な形状で且つ高エネルギー密度の電池が求めら
れている。そして、リチウム電池やリチウムイオン二次
電池などの非水系の電解液を用いる電池は、水溶液系電
池と比較して高電圧、高エネルギー密度が得られ、自己
放電が少ないなどの優れた特性を有することから、利用
範囲の拡大化が期待されている。2. Description of the Related Art In recent years, a flat battery having a high energy density has been demanded from the demand for portable mobile terminal equipment and the like. A battery using a non-aqueous electrolyte such as a lithium battery or a lithium ion secondary battery has excellent characteristics such as higher voltage and higher energy density than an aqueous battery and less self-discharge. Therefore, it is expected that the range of use will be expanded.
【０００３】一般に電解液の電導度が低い非水系の電解
液を用いる電池にあっては、電極の単位面積あたりの取
り出せる電流は小さいことから、大電流を取り出すため
には正極と負極とが対向する面積を広くする必要があ
る。そこで、特開昭６０−２５３１５７号公報に記載さ
れる如く、薄い金属箔を集電体としこれに活物質を付着
させて薄い電極としたり、また図７に示す如く、正極集
電体１１に正極活物質１２を被着した正極１３と、負極
集電体１４に負極活物質１５を被着した負極１６を、セ
パレータ１７を介して互いに活物質が相対向するように
積層してなる電極体層１８を、スパイラル状に捲回する
のではなく、九十九折り状に折り畳むことにより電極体
１９を扁平な電池缶内に効率良く収納することが行われ
ている。Generally, in a battery using a non-aqueous electrolyte having a low electric conductivity, the current that can be taken out per unit area of the electrode is small. Therefore, in order to take out a large current, the positive electrode and the negative electrode face each other. It is necessary to increase the area to be used. Therefore, as described in JP-A-60-253157, a thin metal foil is used as a current collector and an active material is adhered to it to form a thin electrode, or as shown in FIG. An electrode body formed by stacking a positive electrode 13 having a positive electrode active material 12 deposited thereon and a negative electrode 16 having a negative electrode current collector 14 coated with a negative electrode active material 15 such that the active materials face each other via a separator 17. The electrode body 19 is efficiently stored in a flat battery can by folding the layer 18 in a ninety-nine fold shape, rather than winding it in a spiral shape.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、電極体
層１８を九十九折り状に折り畳んだ電極体１９を微視的
に見ると、図８に示す如く、正極活物質１２や負極活物
質１５等は直線的に折曲せずに、折り畳み部分１８ａが
多少膨らんだ形状となり、この膨らみ部分１８ａが重な
った状態で電極体層１８が積層される。これは、均一な
厚さに積層すべき電極体層において、折り畳み部分１８
ａが他より肉厚となる不均一なものであり、これにより
電池缶内に効率的に電極体を収納するのに限界があっ
た。However, when the electrode body 19 obtained by folding the electrode body layer 18 in a 99-fold shape is viewed microscopically, as shown in FIG. 8, the positive electrode active material 12 and the negative electrode active material 15 are formed. Etc. do not bend linearly, but the folded portion 18a has a slightly bulged shape, and the electrode body layer 18 is laminated with the bulged portion 18a overlapping. This is because the folded portion 18 is formed in the electrode body layer to be laminated to have a uniform thickness.
Since the thickness of a is non-uniform and is thicker than the others, there is a limit to the efficient storage of the electrode body in the battery can.
【０００５】そこで、本発明にあっては、電極体層を折
り畳み部分も含めて均一な厚さに積層することで、電極
体を電池缶内に効率的に収納することのできる電池を実
現することを目的とする。Therefore, in the present invention, by stacking the electrode body layers to a uniform thickness including the folded portion, a battery can be realized in which the electrode body can be efficiently housed in the battery can. The purpose is to
【０００６】[0006]
【課題を解決するための手段】上述した目的を達成すべ
く、本発明の電池は、正極集電体に正極活物質を被着し
た正極と負極集電体に負極活物質を被着した負極とをセ
パレータを介して対向させた電極体層を九十九折り状に
折り畳んで積層してなる電極体を用いる電池において、
集電体に正極活物質又は負極活物質の一方を間欠的に塗
工して設けた活物質非存在域を電極体層の折り畳み部分
としたことを特徴とするものである。In order to achieve the above object, the battery of the present invention comprises a positive electrode having a positive electrode current collector coated with a positive electrode active material and a negative electrode having a negative electrode current collector coated with a negative electrode active material. In a battery using an electrode body formed by folding and stacking electrode body layers facing each other via a separator into a 99-fold shape,
The present invention is characterized in that the active material non-existing region, which is provided by intermittently applying one of the positive electrode active material and the negative electrode active material to the current collector, is the folded portion of the electrode body layer.
【０００７】または、正極集電体に正極活物質を被着し
た正極と負極集電体に負極活物質を被着した負極とをセ
パレータを介して対向させた電極体層を九十九折り状に
折り畳んで積層してなる電極体を用いる電池において、
正極集電体及び負極集電体に正極活物質及び負極活物質
を間欠的に塗工して設けた活物質非存在域を電極体層の
折り畳み部分としたことを特徴とするものである。Alternatively, an electrode body layer in which a positive electrode having a positive electrode current collector coated with a positive electrode active material and a negative electrode having a negative electrode current collector coated with a negative electrode active material are opposed to each other through a separator are folded in a zigzag shape. In a battery that uses an electrode body that is folded and laminated into
The positive electrode current collector and the negative electrode current collector are intermittently coated with the positive electrode active material and the negative electrode active material, and the active material non-existing region is used as a folded portion of the electrode body layer.
【０００８】[0008]
【作用】正極集電体に正極活物質を被着した正極と負極
集電体に負極活物質を被着した負極とをセパレータを介
して対向させた電極体層を九十九折り状に折り畳んで積
層してなる電極体を用いる電池において、集電体に正極
活物質又は負極活物質の一方を間欠的に塗工して設けた
活物質非存在域を電極体層の折り畳み部分としたこと
で、電極体層の折り畳み部分に正極活物質又は負極活物
質の何れかが存在しなくなって折り畳み部分が肉薄とな
ることから、電極体層を積層しても折り畳み部分が肉厚
となることなく電極体は均一な肉厚に積層され、電極体
を電池缶内に効率的に収納することができる。[Function] The positive electrode current collector coated with the positive electrode active material and the negative electrode current collector coated with the negative electrode active material are placed opposite to each other via the separator, and the electrode layer is folded into a zigzag shape. In a battery using the electrode body formed by stacking the electrodes, the active material non-existing region provided by intermittently applying one of the positive electrode active material or the negative electrode active material to the current collector is the folded portion of the electrode body layer. Thus, since either the positive electrode active material or the negative electrode active material does not exist in the folded portion of the electrode body layer and the folded portion becomes thin, even if the electrode body layers are laminated, the folded portion does not become thick. The electrode body is laminated with a uniform thickness, and the electrode body can be efficiently housed in the battery can.
【０００９】正極集電体に正極活物質を被着した正極と
負極集電体に負極活物質を被着した負極とをセパレータ
を介して対向させた電極体層を九十九折り状に折り畳ん
で積層してなる電極体を用いる電池において、正極集電
体及び負極集電体に正極活物質及び負極活物質を間欠的
に塗工して設けた活物質非存在域を電極体層の折り畳み
部分としたことで、電極体層の折り畳み部分に正極活物
質及び負極活物質が存在しなくなって折り畳み部分が肉
薄となることから、電極体層を積層しても折り畳み部分
が肉厚となることなく電極体は均一な肉厚に積層され、
電極体を電池缶内に効率的に収納することができる。A positive electrode current collector coated with a positive electrode active material and a negative electrode current collector coated with a negative electrode active material are opposed to each other with a separator interposed therebetween to fold an electrode body layer into a zigzag shape. In the battery using the electrode body formed by stacking the electrode bodies, the positive electrode current collector and the negative electrode current collector are intermittently coated with the positive electrode active material and the negative electrode active material, and the active material non-existing region is formed by folding the electrode body layer. By making it a part, since the positive electrode active material and the negative electrode active material do not exist in the folded part of the electrode body layer and the folded part becomes thin, even if the electrode body layers are laminated, the folded part becomes thick. Without the electrode body is laminated to a uniform thickness,
The electrode body can be efficiently stored in the battery can.
【００１０】[0010]
【実施例】図１は、本発明の電池の第１の実施例におけ
る電極体を示す要部断面図であり、本実施例にあっては
リチウムイオン二次電池を例にとり説明する。図中１は
電極体であり、この電極体１は、アルミニウム箔からな
る正極集電体２にＬｉＣｏＯ2等のリチウム複合酸化物
からなる正極活物質３を塗工した厚さ約１０５μｍの正
極４と、銅箔からなる負極集電体５に炭素質材料からな
る負極活物質６を塗工した厚さ約１４０μｍの負極７と
を、ポリエチレン微多孔膜等からなる厚さ約３５μｍの
セパレータ８を介して対向させた厚さ約２８０μｍのフ
ィルム状の電極体層９を、九十九折り状に折り畳んで構
成されている。EXAMPLE FIG. 1 is a cross-sectional view of an essential part showing an electrode body in a first example of a battery of the present invention. In this example, a lithium ion secondary battery will be described as an example. In the figure, reference numeral 1 denotes an electrode body. This electrode body 1 is composed of a positive electrode current collector 2 made of an aluminum foil and a positive electrode active material 3 made of a lithium composite oxide such as LiCoO 2 coated on the positive electrode 4 having a thickness of about 105 μm. And a negative electrode 7 having a thickness of about 140 μm obtained by coating a negative electrode current collector 5 made of a copper foil with a negative electrode active material 6 made of a carbonaceous material, and a separator 8 having a thickness of about 35 μm made of a polyethylene microporous film or the like. A film-like electrode body layer 9 having a thickness of about 280 μm and opposed to each other is folded in a ninety-nine fold shape.
【００１１】そして、この電極体層９にあっては、図１
に示す如く、全ての折り畳み部分９ａには正極活物質３
が存在せず、正極集電体２、負極７及びセパレータ８と
なっている。電極体層９をこのような構成とするには、
図５及び図６に示す如く、電極体層を構成する正極４に
おける電極体層の折り畳み部分９ａに相当する位置、す
なわち所望する電極体の略幅径毎に、一定程度の幅（電
極体層９の２層分程度）で正極活物質３を塗工せずに活
物質非存在域１０を形成するものである。The electrode body layer 9 shown in FIG.
As shown in FIG. 3, the positive electrode active material 3 is included in all the folded parts 9a.
Does not exist, and the positive electrode current collector 2, the negative electrode 7 and the separator 8 are formed. In order to make the electrode body layer 9 have such a structure,
As shown in FIGS. 5 and 6, at a position corresponding to the folded portion 9a of the electrode body layer in the positive electrode 4 constituting the electrode body layer, that is, at each desired width width of the electrode body, a certain width (electrode body layer) is obtained. The active material non-existing region 10 is formed without coating the positive electrode active material 3 with about 2 layers of 9).
【００１２】図２は、本発明の電池の第２の実施例にお
ける電極体層を示す要部断面図であり、この電極体層９
の製造法としては、まず正極集電体２の両面に、活物質
非存在域１０が表裏で重なるように一定間隔で活物質非
存在域１０を設けながら正極活物質３を塗工して正極４
を形成し、つぎにこの正極４の表裏面にセパレータ８を
貼着し、さらにセパレータ８の両面に、負極集電体５に
負極活物質６を塗工した負極７を重ねたものである。そ
して、この電極体層９における活物質非存在域１０が折
り畳み部分９ａとなるように電極体層９を九十九折り状
に折り畳むことにより、図３に示す如き電極体１とな
る。FIG. 2 is a sectional view of an essential part showing the electrode body layer in the second embodiment of the battery of the present invention.
As a manufacturing method of the positive electrode active material 3, first, the positive electrode active material 3 is applied on both surfaces of the positive electrode current collector 2 while the active material non-existing areas 10 are provided at regular intervals so that the active material non-existing areas 10 overlap on the front and back. Four
Then, a separator 8 is attached to the front and back surfaces of the positive electrode 4, and the negative electrode 7 in which the negative electrode active material 6 is applied to the negative electrode current collector 5 is further laminated on both surfaces of the separator 8. Then, the electrode body layer 9 is folded into a ninety-nine fold so that the active material nonexisting region 10 of the electrode body layer 9 becomes the folded portion 9a, whereby the electrode body 1 as shown in FIG. 3 is obtained.
【００１３】上述した第１の実施例及び第２の実施例に
あっては、活物質非存在域１０を正極４に設けたが、こ
れはリチウムイオン二次電池にあっては負極にリチウム
が析出することを防ぐべく正極よりも負極の塗工領域の
方を広くするためにこのような構成としたものである
が、リチウムイオン二次電池以外の、例えばリチウム電
池では逆に正極にリチウムが析出することを防ぐべく負
極に活物質非存在域を形成することが好ましく、電池に
より適宜に選択するものである。In the first and second embodiments described above, the active material non-existing region 10 is provided in the positive electrode 4. In the lithium ion secondary battery, however, lithium is not contained in the negative electrode. In order to prevent the deposition, the coating area of the negative electrode is made wider than that of the positive electrode, but such a structure is used. It is preferable to form a region in which the active material is absent in the negative electrode in order to prevent precipitation, and it is appropriately selected depending on the battery.
【００１４】図４は、本発明の電池の第３の実施例にお
ける電極体を示す要部断面図であり、この電極体層９に
あっては、全ての折り畳み部分９ａには正極活物質３及
び負極活物質６が存在せず、正極集電体２、負極集電体
５及びセパレータ８のみとなっている。電極体層９をこ
のような構成とするには、図５及び図６に示す如く、電
極体層９を構成する正極４（又は負極７）における電極
体層の折り畳み部分９ａに相当する位置毎に、一定程度
の幅（電極体層９の２層分程度）で正極活物質３（又は
負極活物質６）を塗工せずに活物質非存在域１０を形成
するとともに、正極の活物質非存在域１０と負極７の活
物質非存在域１０とが一致するように重ねるものであ
る。FIG. 4 is a cross-sectional view of an essential part showing an electrode body in a third embodiment of the battery of the present invention. In this electrode body layer 9, all the folded portions 9a have positive electrode active material 3 The negative electrode active material 6 does not exist, and only the positive electrode current collector 2, the negative electrode current collector 5, and the separator 8 are included. In order to make the electrode body layer 9 have such a structure, as shown in FIGS. 5 and 6, at each position corresponding to the folded portion 9a of the electrode body layer in the positive electrode 4 (or the negative electrode 7) constituting the electrode body layer 9. In addition, the active material nonexisting region 10 is formed without coating the positive electrode active material 3 (or the negative electrode active material 6) with a constant width (about two layers of the electrode body layer 9), and the positive electrode active material is formed. The non-existing region 10 and the active material non-existing region 10 of the negative electrode 7 are overlapped with each other.
【００１５】また、このような活物質非存在域１０を設
けた正極４及び負極７の製造方法としては、１枚分の幅
径の集電体に対して活物質の塗工が間欠的に行われるよ
うに塗工機を工夫するか、若しくは複数枚分の大きさの
集電体シートに対し活物質を所定間隔を設けて縦に複数
列塗工した後、この集電体シートを横方向に切断しても
得られる。Further, as a method of manufacturing the positive electrode 4 and the negative electrode 7 provided with the active material non-existing region 10, the active material is intermittently applied to a current collector having a width of one sheet. The coating machine should be devised so that it will be performed, or the active material will be applied to a plurality of sheets of the current collector sheet at predetermined intervals in vertical rows, and then the current collector sheet will be applied horizontally. It can also be obtained by cutting in the direction.
【００１６】尚、図４では、相対向する正極活物質３と
負極活物質６の領域幅を略同一に表わしたが、リチウム
イオン二次電池においてリチウムの析出を防ぐために
は、正極活物質３の塗工領域を相対向する負極活物質６
の塗工領域の方よりも狭小とすることが好ましい。そし
て、各活物質の塗工領域を好適に設定することは、本発
明における正極活物質、負極活物質を塗工する工程にお
いて容易に行えるものである。In FIG. 4, the region widths of the positive electrode active material 3 and the negative electrode active material 6 facing each other are shown to be substantially the same, but in order to prevent lithium deposition in the lithium ion secondary battery, the positive electrode active material 3 is used. Negative electrode active material 6 facing each other
It is preferable that the coated area is smaller than the coated area. The suitable setting of the coating area of each active material can be easily performed in the step of coating the positive electrode active material and the negative electrode active material in the present invention.
【００１７】また、従来の九十九折状に折り畳んで積層
された電極体にあっては、マクロ的に正極の全長が負極
の全長よりも短く設定されているものの、ミクロ的には
負極が内周となる折り畳み部分ではリチウムソースの正
極の方が負極よりも広い面積で存在し、局所的にリチウ
ムが析出する恐れがあったが、本発明によればこのよう
な局所的なリチウム析出をも防ぐことができる。Further, in the conventional electrode body which is folded in a zigzag shape and laminated, the total length of the positive electrode is set to be shorter than the total length of the negative electrode macroscopically, but the negative electrode is microscopically In the folded portion which is the inner periphery, the positive electrode of the lithium source exists in a larger area than the negative electrode, and there is a possibility that lithium may be locally deposited. However, according to the present invention, such local lithium deposition may occur. Can also be prevented.
【００１８】尚、本実施例にあってはリチウムイオン二
次電池を例にとり説明したが、当然のことながらこれに
限定されることはなく、電極体層が九十九折状に折り畳
んで積層してなる電極体を用いる電池であれば、他の如
何なる電池であってもよいものである。In the present embodiment, the lithium ion secondary battery has been described as an example, but the present invention is not limited to this, and the electrode body layers are folded in a zigzag shape and laminated. Any other battery may be used as long as it is a battery using the electrode body.
【００１９】[0019]
【発明の効果】以上詳述した如く、本発明の電池によれ
ば、正極集電体に正極活物質を被着した正極と負極集電
体に負極活物質を被着した負極とをセパレータを介して
対向させた電極体層を九十九折り状に折り畳んで積層し
てなる電極体を用いる電池において、集電体に正極活物
質又は負極活物質の一方を間欠的に塗工して設けた活物
質非存在域を電極体層の折り畳み部分としたことで、電
極体層の折り畳み部分に正極活物質又は負極活物質の何
れかが存在しなくなって折り畳み部分が肉薄となること
から、電極体層を積層しても折り畳み部分が肉厚となる
ことなく電極体は均一な肉厚に積層され、電極体を電池
缶内に効率的に収納することができる。As described above in detail, according to the battery of the present invention, the positive electrode current collector is coated with the positive electrode active material and the negative electrode current collector is coated with the negative electrode active material. In a battery using an electrode body formed by folding and stacking electrode body layers opposed to each other in a 99-fold shape, a current collector is provided with one of a positive electrode active material and a negative electrode active material applied intermittently. By using the active material non-existing region as the folded portion of the electrode body layer, since either the positive electrode active material or the negative electrode active material does not exist in the folded portion of the electrode body layer and the folded portion becomes thin, Even when the body layers are laminated, the electrode body is laminated with a uniform thickness without the folded portion becoming thick, and the electrode body can be efficiently housed in the battery can.
【００２０】また、正極集電体及び負極集電体に正極活
物質及び負極活物質を間欠的に塗工して設けた活物質非
存在域を電極体層の折り畳み部分としたことで、電極体
層の折り畳み部分に正極活物質及び負極活物質が存在し
なくなって折り畳み部分が肉薄となることから、電極体
層を積層しても折り畳み部分が肉厚となることなく電極
体は均一な肉厚に積層され、電極体を電池缶内に効率的
に収納することが可能となる。したがって本発明によれ
ば、電池の小型化や高エネルギー密度化することが可能
となるものである。Further, the positive electrode current collector and the negative electrode current collector are intermittently coated with the positive electrode active material and the negative electrode active material, and the active material non-existing region is used as the folded portion of the electrode body layer, whereby the electrode The positive electrode active material and the negative electrode active material do not exist in the folded portion of the body layer, and the folded portion becomes thin.Therefore, even if the electrode body layers are laminated, the folded portion does not become thick and the electrode body has a uniform thickness. Since the electrodes are stacked to have a large thickness, the electrode body can be efficiently stored in the battery can. Therefore, according to the present invention, it is possible to reduce the size of the battery and increase the energy density.
【図１】本発明の電池の第１の実施例における電極体の
要部断面図である。FIG. 1 is a sectional view of an essential part of an electrode body in a first embodiment of a battery of the present invention.
【図２】本発明の電池の第２の実施例における電極体層
の拡大断面図である。FIG. 2 is an enlarged sectional view of an electrode body layer in a second embodiment of the battery of the present invention.
【図３】本発明の電池の第２の実施例における電極体の
要部断面図である。FIG. 3 is a cross-sectional view of essential parts of an electrode body in a second embodiment of the battery of the present invention.
【図４】本発明の電池の第３の実施例における電極体層
の要部断面図である。FIG. 4 is a cross-sectional view of essential parts of an electrode layer in a third embodiment of the battery of the present invention.
【図５】本発明の電池における正極（負極）を模式的に
示す平面図である。FIG. 5 is a plan view schematically showing a positive electrode (negative electrode) in the battery of the present invention.
【図６】本発明の電池における正極（負極）を模式的に
示す断面図である。FIG. 6 is a cross-sectional view schematically showing a positive electrode (negative electrode) in the battery of the present invention.
【図７】従来の電池における電極体の要部断面図であ
る。FIG. 7 is a cross-sectional view of a main part of an electrode body in a conventional battery.
【図８】従来の電池における電極体の拡大断面図であ
る。FIG. 8 is an enlarged cross-sectional view of an electrode body in a conventional battery.
１ 電極体 ２ 正極集電体 ３ 正極活物質 ４ 正極 ５ 負極集電体 ６ 負極活物質 ７ 負極 ８ セパレータ ９ 電極体層 ９ａ 折り畳み部分 １０ 活物質非存在域 DESCRIPTION OF SYMBOLS 1 Electrode body 2 Positive electrode collector 3 Positive electrode active material 4 Positive electrode 5 Negative electrode collector 6 Negative electrode active material 7 Negative electrode 8 Separator 9 Electrode layer 9a Folded portion 10 Active material non-existing area
Claims (2)
と負極集電体に負極活物質を被着した負極とをセパレー
タを介して対向させた電極体層を九十九折り状に折り畳
んで積層してなる電極体を用いる電池において、集電体
に正極活物質又は負極活物質の一方を間欠的に塗工して
設けた活物質非存在域を電極体層の折り畳み部分とした
ことを特徴とする電池。1. An electrode body layer in which a positive electrode having a positive electrode current collector coated with a positive electrode active material and a negative electrode having a negative electrode current collector coated with a negative electrode active material are opposed to each other with a separator interposed between the electrode layers. In a battery using an electrode body formed by folding and stacking into an electrode, the active material non-existing region provided by intermittently applying one of the positive electrode active material or the negative electrode active material to the current collector is defined as the folded portion of the electrode body layer. Batteries characterized by doing.
と負極集電体に負極活物質を被着した負極とをセパレー
タを介して対向させた電極体層を九十九折り状に折り畳
んで積層してなる電極体を用いる電池において、正極集
電体及び負極集電体に正極活物質及び負極活物質を間欠
的に塗工して設けた活物質非存在域を電極体層の折り畳
み部分としたことを特徴とする電池。2. An electrode body layer in which a positive electrode having a positive electrode current collector coated with a positive electrode active material and a negative electrode having a negative electrode current collector coated with a negative electrode active material are opposed to each other with a separator in between are folded in a zigzag shape. In a battery using an electrode body formed by folding and stacking into a plurality of layers, the positive electrode current collector and the negative electrode current collector are intermittently coated with the positive electrode active material and the negative electrode active material, and the active material non-existing region is provided in the electrode body layer. A battery characterized by being a folded portion of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7174199A JPH097610A (en) | 1995-06-16 | 1995-06-16 | Battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7174199A JPH097610A (en) | 1995-06-16 | 1995-06-16 | Battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH097610A true JPH097610A (en) | 1997-01-10 |
Family
ID=15974464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7174199A Pending JPH097610A (en) | 1995-06-16 | 1995-06-16 | Battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH097610A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025624A (en) * | 2000-06-12 | 2002-01-25 | Cockam Engineering Corp Ltd | Manufacturing method for lithium secondary battery |
| KR20020029487A (en) * | 2000-10-13 | 2002-04-19 | 김순택 | Lithium secondary battery and Eletrode plate assembly thereof |
| JP2002157997A (en) * | 2000-11-16 | 2002-05-31 | Mitsubishi Cable Ind Ltd | Method of manufacturing collapsible lithium battery |
| JP2009021055A (en) * | 2007-07-10 | 2009-01-29 | Mitsui Mining & Smelting Co Ltd | Manufacturing method of nonaqueous electrolyte secondary battery |
| US7794873B2 (en) | 2005-04-26 | 2010-09-14 | Panasonic Corporation | Battery including strip-shaped electrode group folded in a zigzag pattern |
| JP2012033275A (en) * | 2010-07-28 | 2012-02-16 | Aisin Seiki Co Ltd | Manufacturing method for cell laminate, manufacturing apparatus for the same and cell laminate |
-
1995
- 1995-06-16 JP JP7174199A patent/JPH097610A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002025624A (en) * | 2000-06-12 | 2002-01-25 | Cockam Engineering Corp Ltd | Manufacturing method for lithium secondary battery |
| KR20020029487A (en) * | 2000-10-13 | 2002-04-19 | 김순택 | Lithium secondary battery and Eletrode plate assembly thereof |
| JP2002157997A (en) * | 2000-11-16 | 2002-05-31 | Mitsubishi Cable Ind Ltd | Method of manufacturing collapsible lithium battery |
| US7794873B2 (en) | 2005-04-26 | 2010-09-14 | Panasonic Corporation | Battery including strip-shaped electrode group folded in a zigzag pattern |
| JP2009021055A (en) * | 2007-07-10 | 2009-01-29 | Mitsui Mining & Smelting Co Ltd | Manufacturing method of nonaqueous electrolyte secondary battery |
| JP2012033275A (en) * | 2010-07-28 | 2012-02-16 | Aisin Seiki Co Ltd | Manufacturing method for cell laminate, manufacturing apparatus for the same and cell laminate |
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