JPH0864225A - Battery - Google Patents
BatteryInfo
- Publication number
- JPH0864225A JPH0864225A JP6222422A JP22242294A JPH0864225A JP H0864225 A JPH0864225 A JP H0864225A JP 6222422 A JP6222422 A JP 6222422A JP 22242294 A JP22242294 A JP 22242294A JP H0864225 A JPH0864225 A JP H0864225A
- Authority
- JP
- Japan
- Prior art keywords
- electrode body
- electrode
- battery
- folded
- layers
- 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
- 238000006073 displacement reaction Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000007773 negative electrode material Substances 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
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011149 active material 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
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram 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
- 239000007774 positive electrode material Substances 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
Landscapes
- Secondary Cells (AREA)
- Primary Cells (AREA)
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、また正極１２と負極１４をセ
パレータ１３を介して対向させた電極体層１５を、スパ
イラル状に捲回するのではなく、図５に示す如く、九十
九折り状に折り畳むことにより電極体１１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 attached to the current collector to form a thin electrode, or the positive electrode 12 and the negative electrode 14 are opposed to each other via a separator 13. It is possible to efficiently store the electrode body 11 in a flat battery can by folding the formed electrode body layer 15 in a ninety-nine fold shape as shown in FIG. 5, instead of winding it in a spiral shape. It is being appreciated.
【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１５を九十九折り状に折り畳んだ電極体１１にあって
は、図４に示す如く、微視的に見ると集電体やセパレー
タは直線的に折曲せずに、折り畳み部分が多少膨らんだ
形状となり、この膨らみ部分１５ａが重なって電極体層
１５が積層されている。これは、密接して積層すべき電
極体層間に無視し得ない間隙１６を生じるものであり、
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, in the electrode body 11 in which the electrode body layer 15 is folded in a 99-fold shape, as shown in FIG. Instead of being bent linearly, the folded portion has a slightly swollen shape, and the swollen portion 15a overlaps to stack the electrode body layer 15. This produces a non-negligible gap 16 between the electrode body layers to be closely laminated,
As a result, there is a limit in efficiently accommodating the electrode body in the battery can.
【０００５】そこで、本発明にあっては、電極体層の折
り畳み部分が重なって電極体層が積層されることなく、
積層した電極体層間に生じる間隙を減少させ電池缶内に
効率的に電極体を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, the electrode body layers are not laminated by overlapping the folded portions of the electrode body layers.
It is an object of the present invention to realize a battery in which the gap between the stacked electrode body layers is reduced and the electrode body can be efficiently housed in the battery can.
【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、正極と負極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みこれを複
数積層してなる電極体を用いる電池において、膨らみ部
分を有する電極体層の折り畳み部分の端縁を隣接相互に
電極体層１枚の厚さ分以上ずらして積層し、相隣接する
電極体層の折り畳み部分の膨らみ部分を重ならせないこ
とを特徴とするものである。In order to achieve the above-mentioned object, the battery of the present invention has a structure in which an electrode body layer in which a positive electrode and a negative electrode are opposed to each other via a separator is folded into a 99-fold shape and a plurality of layers are laminated. In a battery using such an electrode body, the edges of the folded portions of the electrode body layer having the bulge portion are stacked such that the edges of the folded electrode body layers are displaced from each other by at least the thickness of one electrode body layer, and the folded portions of the adjacent electrode body layers The feature is that the bulges of the do not overlap.
【０００７】また、正極と負極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みこれを複数
積層してなる電極体を用いる電池において、膨らみ部分
を有する電極体層の折り畳み部分の端縁を交互に電極体
層１枚の厚さ分以上ずらして積層し、相隣接する電極体
層の折り畳み部分の膨らみ部分を重ならせないことを特
徴とするものである。Further, in a battery using an electrode body in which an electrode body layer in which a positive electrode and a negative electrode are opposed to each other via a separator is folded in a zigzag shape and a plurality of layers are laminated, folding of the electrode body layer having a bulge portion is performed. It is characterized in that the edges of the parts are alternately stacked by shifting the thickness of one electrode body layer or more, and the bulging parts of the folded parts of the adjacent electrode body layers are not overlapped.
【０００８】[0008]
【作用】正極と負極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みこれを複数積層してな
る電極体を用いる電池において、膨らみ部分を有する電
極体層の折り畳み部分の端縁を隣接相互に電極体層１枚
の厚さ分以上ずらして積層し、相隣接する電極体層の折
り畳み部分の膨らみ部分を重ならせないことで、電極体
における積層した電極体層間に生じる間隙が減少し電池
缶内に効率的に電極体を収納することができる。In a battery using an electrode body formed by folding an electrode body layer in which a positive electrode and a negative electrode are opposed to each other with a separator in between in a zigzag shape, and stacking a plurality of layers, the folded portion of the electrode body layer having a bulged portion By stacking the edges with the thickness of one electrode body layer offset from each other adjacent to each other so that the bulging portions of the folded portions of the adjacent electrode body layers do not overlap, the stacked electrode body layers in the electrode body are The generated gap is reduced, and the electrode body can be efficiently housed in the battery can.
【０００９】また、正極と負極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みこれを複数
積層してなる電極体を用いる電池において、膨らみ部分
を有する電極体層の折り畳み部分の端縁を交互に電極体
層１枚の厚さ分以上ずらして積層し、相隣接する電極体
層の折り畳み部分の膨らみ部分を重ならせないことで、
電極体層のずれによる電極体の幅径の増加を最小限とし
つつ、電極体における積層した電極体層間に生じる間隙
が減少し電池缶内に効率的に電極体を収納することがで
きる。Further, in a battery using an electrode body in which an electrode body layer in which a positive electrode and a negative electrode are opposed to each other through a separator is folded in a zigzag shape and a plurality of layers are laminated, folding of the electrode body layer having a bulge portion is performed. By stacking the edges of the parts alternately by shifting the thickness of one electrode body layer or more, and by not overlapping the bulging parts of the folded parts of the adjacent electrode body layers,
While minimizing the increase in the width of the electrode body due to the displacement of the electrode body layer, the gap generated between the stacked electrode body layers in the electrode body is reduced, and the electrode body can be efficiently housed in the battery can.
【００１０】[0010]
【実施例】図１は、本発明の電池における電極体の第１
の実施例を示す要部断面図であり、図２はこの電極体の
模式図であり、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、アルミニウム箔にリチウム複合酸化物から
なる正極活物質を塗工した厚さ１０５μｍの正極２と、
銅箔に炭素質材料からなる負極活物質を塗工した厚さ１
４０μｍの負極３とを、ポリエチレン微多孔膜等からな
る厚さ３５μｍのセパレータ４を介して対向させた厚さ
約２８０μｍのフィルム状の電極体層５を、負極３が内
側になるように九十九折り状に折り畳んで構成されてい
る。尚、正極と負極のいずれを内側若しくは外側に配置
するかについては、正極及び負極の活物質の構成、電池
外装容器の構造等を考慮の上決定されるものであり、本
実施例の構成に限定されるものではない。EXAMPLE FIG. 1 shows the first electrode assembly in the battery of the present invention.
2 is a schematic cross-sectional view of the electrode body of this embodiment, and FIG. 2 is a schematic view of this electrode body. In this embodiment, a lithium ion secondary battery will be described as an example. In the figure, reference numeral 1 denotes an electrode body, and the electrode body 1 is a positive electrode 2 having a thickness of 105 μm obtained by coating a positive electrode active material made of a lithium composite oxide on an aluminum foil,
Thickness of copper foil coated with negative electrode active material made of carbonaceous material 1
A film-like electrode body layer 5 having a thickness of about 280 μm, which is opposed to a 40 μm negative electrode 3 with a separator 4 made of a polyethylene microporous film or the like having a thickness of 35 μm, is used so that the negative electrode 3 is placed inside. It is constructed by folding it into nine folds. It should be noted that which of the positive electrode and the negative electrode is to be arranged inside or outside is determined in consideration of the configurations of the positive electrode and the negative electrode active material, the structure of the battery outer container, and the like. It is not limited.
【００１１】そして、電極体層５の１枚の厚さは約２８
０μｍであるが、図１に示す如く、最上層の電極体層５
の折り畳み部分の端縁５1に対し、上から２層目の折り
畳み部分の端縁５2は、電極体層５約１枚の厚さ分約３
００μｍ左方向にずれている。さらに、３層目の電極体
層５の折り畳み部分の端縁５3は、前記端縁５2に対し電
極体層５約１枚の厚さ分約３００μｍ右方向にずれ、最
上層の端縁５1と略同一の位置に位置する。また、４層
目の電極体層５の折り畳み部分の端縁５4は、前記端縁
５3に対し電極体層５約１枚の厚さ分左方向にずれ、２
層目の端縁５2と略同一の位置に位置する。そして、図
示しないが、以下同様に電極体層の折り畳み部分の端縁
は、電極体層約１枚の厚さ分交互に左右にずらして積層
されている。尚、左右に位置ずれするのは電極体１の片
側の端縁だけでなく、図２に示す如く、上述した端縁の
反対側の端縁についても同様にずれるものである。The thickness of one electrode layer 5 is about 28.
0 μm, but as shown in FIG. 1, the uppermost electrode body layer 5
In contrast to the edge 5 1 of the folded portion of, the edge 5 2 of the folded portion of the second layer from the top is about 3 times the thickness of one electrode body layer 5.
It is shifted to the left by 00 μm. Furthermore, the edge 5 3 parts folding the third layer of the electrode layer 5, the end edge 5 2 to shift to the electrode layer 5 approximately one corresponding to the thickness of about 300μm right, uppermost edge It is located at the same position as 5 1 . Further, the end edge 5 4 of the folded portion of the fourth electrode body layer 5 is displaced leftward by the thickness of about one electrode body layer 5 with respect to the end edge 5 3 ,
Located in the edge 5 2 substantially the same position of the layer eyes. Then, although not shown, the edges of the folded portions of the electrode body layers are alternately stacked by the thickness of about one electrode body layer so as to be shifted left and right alternately. Not only the edge on one side of the electrode body 1 is displaced to the left and right, but also the edge on the opposite side of the above-mentioned edge is similarly displaced as shown in FIG.
【００１２】電極体層５の折り畳み部分は、図１に示す
如く、折り畳み時に内側に位置する負極３の表面から若
干離れた空間上の点を折り曲げ中心とした半円よりも若
干大きい円弧形状を形成することから、上下方向の最も
肉厚となる膨らみ部分５ａが折り畳み部分の端縁５1〜
５4から電極体層約１枚の厚さ分内側に位置する。そこ
で、電極体層約１枚の厚さ分交互に左右にずらして積層
することにより、電極体層における折り畳み部分の膨ら
み部分５ａ同士が上下に重ならなくなり、これにより積
層した電極体層５間の間隙６は、前述した従来の電極体
１１における間隙１６と比較して約半分となるものであ
る。As shown in FIG. 1, the folded portion of the electrode body layer 5 has an arc shape slightly larger than a semicircle whose folding center is a point in the space slightly separated from the surface of the negative electrode 3 located inside when folded. Since it is formed, the bulging portion 5a having the thickest thickness in the vertical direction is the end edge of the folded portion 5 1 to
5 4 located the thickness of the inner side of about one electrode layer from. Therefore, by alternately shifting the thicknesses of about one electrode body layer to the left and right, the bulging portions 5a of the folded portions of the electrode body layers do not vertically overlap with each other, so that between the stacked electrode body layers 5. The gap 6 is approximately half of the gap 16 in the conventional electrode body 11 described above.
【００１３】また、電極体層を交互に左右にずらす寸法
は、電極体層約１枚の厚さ分以上であればよく、たとえ
電極体層約２枚分以上ずらしても積層した電極体層間の
間隙６がこれ以上狭くならないことに加え、電極体１に
おける左右方向の幅径が不必要に増大し、かえって電極
体の収納性が低下する。The size of the electrode body layers that are alternately displaced to the right and left may be at least the thickness of one electrode body layer, and even if the electrode body layers are displaced by two or more electrode body layers, In addition to the fact that the gap 6 does not become narrower than this, the width of the electrode body 1 in the left-right direction unnecessarily increases, which rather reduces the storability of the electrode body.
【００１４】図３は、本発明の電池における電極体の第
２の実施例の模式図であり、この電極体１にあっては、
最上層の電極体層５における右側の折り畳み部分の端縁
５5に対し、上から２層目の折り畳み部分の端縁５6は、
電極体層５約２枚の厚さ分約６００μｍ右方向にずれて
いる。さらに、３層目の電極体層５の折り畳み部分の端
縁５7も、同じく前記端縁５6に対し電極体層５約２枚の
厚さ分約６００μｍ右方向にずれている。また、４層目
の電極体層５の折り畳み部分の端縁５8は、前記端縁５7
に対し電極体層５約２枚の厚さ分約６００μｍ左方向に
ずれ、２層目の端縁５6と略同一の位置に位置する。そ
して、５層目の電極体層５の折り畳み部分の端縁５
9は、同じく前記端縁５8に対し電極体層５約２枚の厚さ
分約６００μｍ左方向にずれ、最上層の端縁５5と略同
一の位置に位置する。そして、以下同様に電極体層の折
り畳み部分の端縁は、隣接相互に電極体層約２枚の厚さ
分左右にずらしつつ、ずらす方向を２つおきに変えて積
層されている。この実施例にあっては、電極体１の左右
方向の幅径は前述した第１の実施例の電極体と比較し
て、電極体層約２枚分約１２００μｍ増大する。これに
よっても、電極体層における折り畳み部分の膨らみ部分
５ａ同士が上下に重ならなくなって、積層した電極体層
５間の間隙が前述した従来の電極体１１における間隙１
６と比較して約半分となる。FIG. 3 is a schematic view of a second embodiment of the electrode body in the battery of the present invention. In this electrode body 1,
To edge 5 5 the right folds in the electrode layer 5 of the uppermost layer, the edges 5 6 folds the second layer from the top,
The thickness of the two electrode body layers 5 is shifted by about 600 μm to the right. Further, the edge 5 7 of the folded portion of the third electrode body layer 5 is also shifted to the right by about 600 μm by the thickness of about 2 electrode body layers 5 with respect to the edge 5 6 . The edge 5 8 of the folded portion of the fourth electrode body layer 5 is the edge 5 7
On the other hand, the electrode body layer 5 is displaced to the left by about 600 μm by the thickness of two sheets, and is located at substantially the same position as the edge 5 6 of the second layer. Then, the edge 5 of the folded portion of the fifth electrode body layer 5
9, like the edge 5 8 to shift to the electrode layer 5 of about two the thickness of about 600μm leftward, located edge 5 5 substantially the same position in the top layer. Similarly, the edges of the folded portions of the electrode body layers are laminated in such a manner that the edges of the folded portions of the electrode body layers are laterally displaced from each other by the thickness of about two electrode body layers and the displacement direction is changed every two. In this embodiment, the width of the electrode body 1 in the left-right direction is increased by about 1200 μm by about two electrode body layers as compared with the electrode body of the first embodiment described above. This also prevents the bulging portions 5a of the folded portions of the electrode body layers from vertically overlapping each other, and the gap between the stacked electrode body layers 5 becomes the gap 1 in the conventional electrode body 11 described above.
It is about half compared to 6.
【００１５】また、特に図示しないが、前述した第２の
実施例における電極体層の折り畳み部分の端縁を３つお
きに若しくはそれ以上おきにずらす方向を変えてもよ
く、さらには隣接相互間の端縁のずれる方向をランダム
としてもよいものである。Although not shown in the drawing, the end edges of the folded portion of the electrode layer in the second embodiment described above may be shifted every three or more, and the direction between the adjacent edges may be changed. The direction in which the edge of is shifted may be random.
【００１６】[0016]
【発明の効果】以上詳述した如く、本発明の電池によれ
ば、正極と負極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みこれを複数積層してなる電
極体を用いる電池において、膨らみ部分を有する電極体
層の折り畳み部分の端縁を隣接相互に電極体層１枚の厚
さ分以上ずらして積層し、相隣接する電極体層の折り畳
み部分の膨らみ部分を重ならせないことで、電極体にお
ける積層した電極体層間に生じる間隙が減少し電池缶内
に効率的に電極体を収納することができる。As described above in detail, according to the battery of the present invention, the electrode body is formed by folding the electrode body layer in which the positive electrode and the negative electrode are opposed to each other with the separator interposed between them in the 99-fold shape. In the battery using, the edges of the folded portions of the electrode body layers having the bulged portions are stacked such that the edges of the folded electrode body layers are displaced from each other by at least the thickness of one electrode body layer, and the bulged portions of the folded portions of the adjacent electrode body layers are stacked. By not overlapping, the gaps between the stacked electrode body layers in the electrode body are reduced, and the electrode body can be efficiently housed in the battery can.
【００１７】また、正極と負極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みこれを複数
積層してなる電極体を用いる電池において、膨らみ部分
を有する電極体層の折り畳み部分の端縁を交互に電極体
層１枚の厚さ分以上ずらして積層し、相隣接する電極体
層の折り畳み部分の膨らみ部分を重ならせないことで、
電極体層のずれによる電極体の幅径の増加を最小限とし
つつ、電極体における積層した電極体層間に生じる間隙
が減少し電池缶内に効率的に電極体を収納することがで
きる。Further, in a battery using an electrode body in which a positive electrode and a negative electrode are opposed to each other with a separator in between and folded in a 99-fold shape, a plurality of electrode bodies are stacked to fold the electrode body layer having a bulge portion. By stacking the edges of the parts alternately by shifting the thickness of one electrode body layer or more, and by not overlapping the bulging parts of the folded parts of the adjacent electrode body layers,
While minimizing the increase in the width of the electrode body due to the displacement of the electrode body layer, the gap generated between the stacked electrode body layers in the electrode body is reduced, and the electrode body can be efficiently housed in the battery can.
【００１８】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。Therefore, according to the present invention, it is possible to reduce the size of the battery and increase the energy density.
【図１】本発明の電池における電極体の部分断面図であ
る。FIG. 1 is a partial cross-sectional view of an electrode body in a battery of the present invention.
【図２】本発明の電池における電極体の模式図である。FIG. 2 is a schematic diagram of an electrode body in the battery of the present invention.
【図３】本発明の電池における電極体の模式図である。FIG. 3 is a schematic view of an electrode body in the battery of the present invention.
【図４】従来の電池における電極体の部分断面図であ
る。FIG. 4 is a partial cross-sectional view of an electrode body in a conventional battery.
【図５】従来の電池における電極体の模式図である。FIG. 5 is a schematic view of an electrode body in a conventional battery.
１ 電極体 ２ 正極 ３ 負極 ４ セパレータ ５ 電極体層 ５ａ 膨らみ部分 ５1〜５9 折り畳み部分の端縁 ６ 間隙DESCRIPTION OF SYMBOLS 1 Electrode body 2 Positive electrode 3 Negative electrode 4 Separator 5 Electrode body layer 5a Bulging portion 5 1 to 5 9 Edge of folded portion 6 Gap
Claims (2)
せた電極体層を九十九折り状に折り畳みこれを複数積層
してなる電極体を用いる電池において、膨らみ部分を有
する電極体層の折り畳み部分の端縁を隣接相互に電極体
層１枚の厚さ分以上ずらして積層し、相隣接する電極体
層の折り畳み部分の膨らみ部分を重ならせないことを特
徴とする電池。1. A battery using an electrode body in which an electrode body layer in which a positive electrode and a negative electrode are opposed to each other via a separator is folded in a zigzag shape and a plurality of the electrode body layers are stacked, and the electrode body layer having a bulge portion is folded. A battery, characterized in that the edges of the parts are stacked such that they are offset from each other by the thickness of one electrode body layer or more so that the bulging parts of the folded parts of the adjacent electrode body layers do not overlap.
せた電極体層を九十九折り状に折り畳みこれを複数積層
してなる電極体を用いる電池において、膨らみ部分を有
する電極体層の折り畳み部分の端縁を交互に電極体層１
枚の厚さ分以上ずらして積層し、相隣接する電極体層の
折り畳み部分の膨らみ部分を重ならせないことを特徴と
する電池。2. In a battery using an electrode body in which an electrode body layer in which a positive electrode and a negative electrode are opposed to each other via a separator is folded in a zigzag shape and a plurality of the electrode body layers are stacked, folding of the electrode body layer having a bulge portion is performed. The electrode body layer 1 with the edges of the parts alternately
A battery characterized in that they are stacked with a shift of at least the thickness of one sheet so that the bulging portions of the folded portions of adjacent electrode body layers do not overlap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6222422A JPH0864225A (en) | 1994-08-24 | 1994-08-24 | Battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6222422A JPH0864225A (en) | 1994-08-24 | 1994-08-24 | Battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0864225A true JPH0864225A (en) | 1996-03-08 |
Family
ID=16782149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6222422A Pending JPH0864225A (en) | 1994-08-24 | 1994-08-24 | Battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0864225A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020029487A (en) * | 2000-10-13 | 2002-04-19 | 김순택 | Lithium secondary battery and Eletrode plate assembly thereof |
| JP2023501838A (en) * | 2020-09-29 | 2023-01-20 | 寧徳新能源科技有限公司 | Secondary battery and battery module |
-
1994
- 1994-08-24 JP JP6222422A patent/JPH0864225A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020029487A (en) * | 2000-10-13 | 2002-04-19 | 김순택 | Lithium secondary battery and Eletrode plate assembly thereof |
| JP2023501838A (en) * | 2020-09-29 | 2023-01-20 | 寧徳新能源科技有限公司 | Secondary battery and battery module |
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