JP2002280055A - Flat wound group manufacturing method and winding device - Google Patents
Flat wound group manufacturing method and winding deviceInfo
- Publication number
- JP2002280055A JP2002280055A JP2001080325A JP2001080325A JP2002280055A JP 2002280055 A JP2002280055 A JP 2002280055A JP 2001080325 A JP2001080325 A JP 2001080325A JP 2001080325 A JP2001080325 A JP 2001080325A JP 2002280055 A JP2002280055 A JP 2002280055A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- flat
- group
- wound
- core material
- 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
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- Secondary Cells (AREA)
- Primary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は扁平捲回群製造方法
及び製造装置に係り、特に一対の平板状捲回軸を有する
捲回装置に極板及びセパレータを捲き付けて扁平状捲回
群を作製し、該扁平状捲回群を押し潰して扁平捲回群を
製造する扁平捲回群製造方法及び一対の平板状捲回軸を
有し、極板及びセパレータを捲き付けて扁平状捲回群を
作製する捲回装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a flat wound group, and more particularly, to a flat winding group having a pair of flat winding shafts on which an electrode plate and a separator are wound. A flat winding group manufacturing method for manufacturing and crushing the flat winding group to manufacture a flat winding group, and a pair of flat winding shafts, and winding an electrode plate and a separator to form a flat winding group. The present invention relates to a winding device for producing a group.
【０００２】[0002]
【従来の技術】従来、扁平電池に内蔵される扁平捲回群
は、図５（Ａ）に示すように、一対の平板状捲回軸片１
Ａ、１Ｂで捲回軸１を構成する捲回装置により捲回され
ている。捲回開始時に捲回軸片１Ａ、１Ｂを左右にずら
しておき、捲回軸１の中心を回転軸として、正極、負極
及びセパレータを捲回軸１に捲回して扁平状捲回群７Ｅ
を作製する。図５（Ｂ）に示すように、捲回軸片１Ａ、
１Ｂの左右のずれを揃えることにより、略扁平六角形状
の扁平状捲回群７Ｅは略扁平楕円状の扁平状捲回群７Ｃ
となり、扁平状捲回群７Ｃは捲回軸１から容易に取り外
すことができる。図５（Ｃ）に示すように、捲回軸１か
ら取り外された扁平状捲回群７Ｃは、捲回軸１が存在し
ていた空間をそのまま有している。そして、図５（Ｄ）
に示すように、扁平状捲回群７Ｃを上側から押し潰し
て、断面細長の空間２９を内部に有する扁平捲回群７Ｄ
が製造される。なお、扁平状捲回群７Ｃを空間２９が存
在しない状態まで押し潰すと、内周側の正負極板の湾曲
箇所が損傷するので、空間２９を形成する必要がある。2. Description of the Related Art Conventionally, a flat wound group built in a flat battery includes a pair of flat wound shaft pieces 1 as shown in FIG.
A and B are wound by a winding device constituting the winding shaft 1. At the start of winding, the winding shaft pieces 1A and 1B are shifted left and right, and the positive electrode, the negative electrode, and the separator are wound around the winding shaft 1 with the center of the winding shaft 1 as a rotation axis, and a flat winding group 7E is formed.
Is prepared. As shown in FIG. 5 (B), the wound shaft piece 1A,
By aligning the left and right deviations of 1B, the substantially flat hexagonal flat winding group 7E becomes substantially flat elliptical flat winding group 7C.
Thus, the flat wound group 7C can be easily removed from the winding shaft 1. As shown in FIG. 5C, the flat wound group 7C removed from the winding shaft 1 has the space where the winding shaft 1 was present as it is. Then, FIG. 5 (D)
As shown in the figure, the flat wound group 7C is crushed from the upper side to form a flat wound group 7D having a space 29 having a narrow cross section therein.
Is manufactured. When the flat wound group 7C is crushed to a state where the space 29 does not exist, the curved portion of the positive and negative electrode plates on the inner peripheral side is damaged, so that the space 29 needs to be formed.
【０００３】また、図６に示すように、捲回軸を使用せ
ずに、ポリプロピレン（ＰＰ）樹脂を射出成形したＰＰ
樹脂製芯材３１を扁平捲回群の軸芯として用い、ＰＰ樹
脂製芯材３１の周りに正極、負極及びセパレータを捲回
して扁平捲回群７Ｇを形成し、ＰＰ樹脂製芯材３１ごと
扁平捲回群７Ｇをそのまま扁平電池に組み込む方法もあ
る。Further, as shown in FIG. 6, a polypropylene (PP) resin obtained by injection molding without using a winding shaft is used.
Using the resin core material 31 as the shaft core of the flat wound group, the positive electrode, the negative electrode, and the separator are wound around the PP resin core material 31 to form a flat wound group 7G. There is also a method of directly incorporating the flat wound group 7G into a flat battery.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、携帯電
話の電源などに用いられる小型電池では、捲回群の質量
が小さいので、芯材のない扁平捲回群７Ｄを用いても電
池の耐振性などに支障はないものの、例えば、近年実用
化が急がれている電気自動車（ＥＶ）用等の大型電池で
は扁平捲回群７Ｄの質量が大きくなるので、芯材のない
構造では十分な耐振性を得ることができない、という問
題がある。従来の扁平捲回群作製方法でも、捲回装置か
ら扁平状捲回群を取り外した後に芯材を挿入することが
できないわけではないが、芯材と扁平捲回群の最内周の
セパレータとの接着時の位置合わせが難しく、量産化が
困難であった。However, in the case of a small battery used as a power source of a mobile phone, the mass of the wound group is small, so that even if the flat wound group 7D having no core material is used, the vibration resistance of the battery is not improved. Although there is no hindrance, for example, in the case of a large battery for an electric vehicle (EV) and the like, which has been urgently put into practical use in recent years, the mass of the flat wound group 7D becomes large. There is a problem that can not be obtained. Even with the conventional flat wound group manufacturing method, the core material cannot be inserted after the flat wound group is removed from the winding device, but the core material and the innermost separator of the flat wound group are not removed. It was difficult to align the substrates during bonding, and mass production was difficult.
【０００５】また、ＰＰ樹脂製芯材３１を扁平捲回群の
軸芯として用いる構造では、ＰＰ樹脂製芯材３１と扁平
捲回群７Ｇとが全周で密着しているので、十分な耐振性
が得られるものの、ＰＰ樹脂製芯材３１が捲回時の極板
やセパレータの強い張力に耐え得る強度を必要とするた
めに、薄い軸芯とすることができず、扁平捲回群の中央
に大きなデッドスペースが生じ、扁平電池の体積効率
（Ａｈ／ｌ）を大幅に損なう、という問題があった。Further, in the structure in which the PP resin core material 31 is used as the shaft core of the flat wound group, the PP resin core material 31 and the flat wound group 7G are in close contact with each other over the entire circumference. However, since the PP resin core material 31 needs to be strong enough to withstand the strong tension of the electrode plate and the separator at the time of winding, it cannot be formed into a thin shaft core, and the flat wound group There is a problem that a large dead space is generated in the center, and the volume efficiency (Ah / l) of the flat battery is significantly impaired.
【０００６】本発明は上記事案に鑑み、体積効率に優れ
ると共に耐振性を有する扁平捲回群の製造方法及び該捲
回装置を提供することを課題とする。SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a method of manufacturing a flat wound group having excellent volumetric efficiency and vibration resistance, and to provide the winding apparatus.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に、本発明の第１の態様は、一対の平板状捲回軸を有す
る捲回装置に極板及びセパレータを捲き付けて扁平状捲
回群を作製し、該扁平状捲回群を押し潰して扁平捲回群
を製造する扁平捲回群製造方法であって、前記扁平捲回
群の軸芯となる薄肉捲胴体を前記捲回軸の外周に当接す
る形状に変形させ、前記薄肉捲胴体を介して前記捲回軸
に前記極板及びセパレータを捲き付けて捲回した後、前
記薄肉捲胴体ごと前記扁平状捲回群を前記捲回軸から取
り外すステップを含むことを特徴とする。Means for Solving the Problems To solve the above problems, a first aspect of the present invention is to provide a flat winding device in which an electrode plate and a separator are wound on a winding device having a pair of flat winding shafts. A flat wound group manufacturing method of manufacturing a flat wound group and crushing the flat wound group to manufacture a flat wound group, wherein the thin wound body serving as a shaft core of the flat wound group is wound. After being deformed into a shape that comes into contact with the outer periphery of the shaft, the electrode plate and the separator are wound around the winding shaft through the thin winding body, and the flat winding group together with the thin winding body is formed. It is characterized by including the step of removing from the winding shaft.
【０００８】本態様では、扁平捲回群の軸芯となる薄肉
捲胴体を捲回軸の外周に当接する形状に変形させる。こ
のとき、薄肉捲胴体は、例えば、捲回軸を互いに反対側
に移動させて捲回軸の外周に当接する形状に変形させる
ようにしてもよい。薄肉捲胴体には、例えば、厚さ１ｍ
ｍ以下の金属製薄肉筒体又は厚さ２ｍｍ以下の合成樹脂
製薄肉筒体を用いることができる。次に、薄肉捲胴体を
介して捲回軸に極板及びセパレータを捲き付けて捲回す
ることで扁平状捲回群を作製する。その後、薄肉捲胴体
ごと扁平状捲回群を捲回軸から取り外し、扁平状捲回群
を押し潰して扁平捲回群を製造する。本態様によれば、
薄肉捲胴体ごと扁平状捲回群を押し潰すことにより、扁
平状捲回群内の薄肉捲胴体も押し潰され最内周のセパレ
ータと全周で密着する構造となるので、扁平捲回群を薄
くすることができ、体積効率を高めることができると共
に、薄肉捲胴体を電池内部で固定することで、耐振性に
優れた電池を得ることができる。この場合において、金
属製の薄肉捲胴体を用いたときは薄肉捲胴体の外面に両
面接着テープを貼付してから、合成樹脂製の薄肉捲胴体
を用いたときはセパレータを溶着してから、極板及びセ
パレータを捲き付けて捲回することが好ましい。[0008] In this embodiment, the thin-walled winding body serving as the shaft core of the flat winding group is deformed into a shape in contact with the outer periphery of the winding shaft. At this time, for example, the thin-walled winding body may be deformed into a shape in which the winding shafts are moved to opposite sides to come into contact with the outer periphery of the winding shaft. For a thin-walled winding body, for example, a thickness of 1 m
m or a synthetic resin thin cylinder having a thickness of 2 mm or less. Next, a flat winding group is produced by winding the electrode plate and the separator around the winding shaft via the thin winding body and winding. Thereafter, the flat winding group together with the thin-walled winding body is removed from the winding shaft, and the flat winding group is crushed to produce a flat winding group. According to this aspect,
By crushing the flat wound group together with the thin-walled winding body, the thin-walled winding body in the flat-shaped winding group is also crushed and has a structure in close contact with the innermost separator, so that the flat wound group is The battery can be made thinner, the volumetric efficiency can be increased, and the battery having excellent vibration resistance can be obtained by fixing the thin-walled winding body inside the battery. In this case, after using a metal thin-walled body, a double-sided adhesive tape is attached to the outer surface of the thin-walled body, and when using a synthetic resin thin-walled body, the separator is welded, It is preferable that the plate and the separator are wound and wound.
【０００９】また、上記課題を解決するために、本発明
の第２の態様は、一対の平板状捲回軸を有する捲回装置
に極板及びセパレータを捲き付けて扁平状捲回群を作製
し、該扁平状捲回群を押し潰して扁平捲回群を製造する
扁平捲回群製造方法であって、前記捲回軸のうち少なく
とも一方の捲回軸には前記極板及びセパレータが捲き付
けられる外周面に凹部が形成されており、該凹部に前記
扁平捲回群の軸芯となる平板状芯材を収容し、前記捲回
軸に前記極板及びセパレータを捲き付けて捲回した後、
前記芯材ごと前記扁平状捲回群を前記捲回軸から取り外
すステップを含むことを特徴とする。In order to solve the above problems, a second aspect of the present invention is to form a flat winding group by winding an electrode plate and a separator on a winding device having a pair of flat winding shafts. A flat wound group manufacturing method of crushing the flat wound group to manufacture a flat wound group, wherein the electrode plate and the separator are wound on at least one of the wound shafts. A concave portion is formed on the outer peripheral surface to be attached, a flat core material serving as a shaft core of the flat wound group is accommodated in the concave portion, and the electrode plate and the separator are wound around the wound shaft and wound. rear,
The method further comprises a step of removing the flat wound group together with the core material from the wound shaft.
【００１０】本態様では、捲回軸のうち少なくとも一方
の捲回軸に極板及びセパレータが捲き付けられる外周面
に扁平状捲回群の軸芯となる平板状芯材を収容する凹部
が形成された捲回装置が用いられる。該捲回装置の凹部
に扁平捲回群の軸芯となる平板状芯材を収容する。次
に、捲回軸に極板及びセパレータを捲き付けて捲回する
ことにより扁平状捲回群を作製する。その後、芯材ごと
扁平状捲回群を捲回装置から取り外し、扁平状捲回群を
押し潰して扁平捲回群を製造する。本態様によれば、芯
材が捲回軸のうち少なくとも一方の捲回軸に形成された
凹部に収容されているので、捲回時に芯材に掛かる極板
やセパレータからの張力が小さいので、芯材を薄くする
ことができ、扁平捲回群の体積効率を高めることができ
ると共に、扁平状捲回群を押し潰すことで芯材が扁平状
捲回群の最内周のセパレータと密着する構造となるの
で、芯材を電池内部で固定することで、耐振性に優れた
電池を得ることができる。この場合において、芯材の外
周面の裏面側に両面接着テープを貼り付けてから捲回軸
に極板及びセパレータを捲き付けて捲回した後、芯材ご
と扁平状捲回群を捲回軸から取り外し、扁平状捲回群を
押し潰して芯材の裏面側に貼り付けられた両面接着テー
プとセパレータの最内周とを接着するようにしてもよ
い。このとき、捲回装置の凹部に、軸芯に貼付される両
面接着テープを収容するテープ収容溝が形成されている
ことが好ましい。[0010] In this aspect, at least one of the winding shafts is provided with a recess for accommodating a flat core material serving as a shaft core of the flat winding group on an outer peripheral surface on which the electrode plate and the separator are wound. The used winding device is used. A flat core material to be the axis of the flat winding group is accommodated in the concave portion of the winding device. Next, an electrode plate and a separator are wound around a winding shaft and wound to form a flat wound group. Thereafter, the flat wound group together with the core material is removed from the winding device, and the flat wound group is crushed to produce a flat wound group. According to this aspect, since the core material is housed in the concave portion formed on at least one of the winding shafts of the winding shaft, the tension from the electrode plate and the separator applied to the core material during winding is small, The core material can be thinned, the volume efficiency of the flat wound group can be increased, and the core material adheres to the innermost separator of the flat wound group by crushing the flat wound group. With this structure, a battery having excellent vibration resistance can be obtained by fixing the core material inside the battery. In this case, after the double-sided adhesive tape is attached to the back surface side of the outer peripheral surface of the core material, and the electrode plate and the separator are wound around the winding shaft and wound, the flat winding group together with the core material is wound around the winding shaft. , The flat wound group may be crushed and the double-sided adhesive tape attached to the back side of the core material and the innermost circumference of the separator may be bonded. At this time, it is preferable that a tape accommodating groove for accommodating the double-sided adhesive tape attached to the shaft core is formed in the concave portion of the winding device.
【００１１】[0011]
【発明の実施の形態】（第１実施形態）以下、図面を参
照して、電気自動車に搭載される扁平型リチウムイオン
電池の製造に、本発明に係る扁平捲回群製造方法を適用
した第１の実施の形態について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Referring to the drawings, a flat wound group manufacturing method according to the present invention is applied to the manufacture of a flat type lithium ion battery mounted on an electric vehicle. One embodiment will be described.
【００１２】図１に示すように、本実施形態では、扁平
型リチウムイオン電池の扁平状捲回群を作製するため
に、従来の捲回装置が使用される。この製造装置は、断
面が略扁平台形状の一対の捲回軸片１Ａ、１Ｂを有する
捲回軸１を備えている。捲回軸片１Ａ、１Ｂは、扁平台
形状の底辺同士が互いに向い合い当接されており、この
当接面を境に左右方向へずらすことが可能である。ま
た、捲回軸片１Ａ、１Ｂは、捲回軸１の中心を回転軸と
して矢印Ａ方向に回転可能である。As shown in FIG. 1, in this embodiment, a conventional winding device is used to produce a flat-shaped winding group of a flat-type lithium-ion battery. This manufacturing apparatus includes a winding shaft 1 having a pair of winding shaft pieces 1A and 1B having a substantially flat trapezoidal cross section. The wound trapezoidal pieces 1A and 1B have flat trapezoidal bottom sides facing each other and are in contact with each other, and can be displaced in the left and right directions with this contact surface as a boundary. Further, the wound shaft pieces 1A and 1B are rotatable in the direction of arrow A about the center of the wound shaft 1 as a rotation axis.
【００１３】まず、厚さ１ｍｍ以下の金属製薄肉円筒又
は厚さ２ｍｍ以下の合成樹脂製薄肉円筒を準備してお
き、捲回装置の捲回軸片１Ａ、１Ｂを揃え、捲回軸１に
薄肉円筒を変形させながら挿入する。First, a metal thin cylinder having a thickness of 1 mm or less or a synthetic resin thin cylinder having a thickness of 2 mm or less is prepared, and the winding shaft pieces 1A and 1B of the winding device are aligned. Insert while deforming the thin cylinder.
【００１４】次に、捲回軸片１Ａ、１Ｂを左右方向にず
らすことにより、薄肉円筒を捲回軸１の外周に当接する
形状に変形させる。これにより、薄肉円筒は断面が略扁
平六角形状の六角状芯材２に変形する。鈍角部（六角状
芯材２の外周を４等分した位置）を含むように六角状芯
材２の平面部に両面接着テープ３の一面を接着し、セパ
レータ４ａ及び捲回装置によりセパレータ４ａに端部が
溶着されたセパレータ４ｂを、両面接着テープ３の他面
に接着する。セパレータ４ａ及び４ｂの間には負極板６
が配置されており、セパレータ４ａの下側には正極板５
が配置されている。Next, by shifting the winding shaft pieces 1A and 1B in the left-right direction, the thin cylinder is deformed into a shape in contact with the outer periphery of the winding shaft 1. Thereby, the thin-walled cylinder is transformed into a hexagonal core material 2 having a substantially flat hexagonal cross section. One surface of the double-sided adhesive tape 3 is adhered to the flat portion of the hexagonal core material 2 so as to include an obtuse angle portion (position where the outer periphery of the hexagonal core material 2 is divided into four equal parts), and the separator 4a and the separator 4a The separator 4b whose end is welded is adhered to the other surface of the double-sided adhesive tape 3. A negative electrode plate 6 is provided between the separators 4a and 4b.
Are disposed, and a positive electrode plate 5 is provided below the separator 4a.
Is arranged.
【００１５】ここで、正極板５は、正極活物質としてマ
ンガン酸リチウム（ＬｉＭｎ２Ｏ４）粉末に、導電材と
して鱗片状黒鉛粉末と結着剤としてポリフッ化ビニリデ
ン（ＰＶＤＦ）とを所定質量比で添加し、これに分散溶
媒としてＮ−メチルピロリドンを添加、混練したスラリ
を、厚さ２０μｍのアルミニウム箔の両面に均一に塗布
し、乾燥させた後、プレスして帯状に作製したものであ
る。一方、負極板６は、負極活物質として非晶質炭素粉
末に、結着剤としてポリフッ化ビニリデンを所定配合比
で添加し、これに分散溶媒としてＮ−メチルピロリドン
を添加、混練したスラリを、厚さ１０μｍの圧延銅箔の
両面に塗布し、乾燥させた後、プレスして帯状に作製し
たものである。また、セパレータ４ａ、４ｂには、正極
板５及び負極板６を隔離すると共にリチウムイオンの通
過を許容するために、厚さ４０μｍのポリエチレン製微
多孔膜を用いた。The positive electrode plate 5 has a predetermined mass ratio of lithium manganate (LiMn 2 O 4 ) powder as a positive electrode active material, flaky graphite powder as a conductive material, and polyvinylidene fluoride (PVDF) as a binder. And N-methylpyrrolidone as a dispersing solvent was added thereto, and the kneaded slurry was uniformly applied to both surfaces of an aluminum foil having a thickness of 20 μm, dried, and then pressed to produce a band. . On the other hand, for the negative electrode plate 6, a slurry obtained by adding polyvinylidene fluoride as a binder at a predetermined mixing ratio to amorphous carbon powder as a negative electrode active material, adding N-methylpyrrolidone as a dispersion solvent thereto, It is applied to both sides of a rolled copper foil having a thickness of 10 μm, dried, and then pressed to produce a strip. As the separators 4a and 4b, a polyethylene microporous membrane having a thickness of 40 μm was used to isolate the positive electrode plate 5 and the negative electrode plate 6 and allow lithium ions to pass therethrough.
【００１６】捲回軸１を図１の矢印Ａ方向に回転させ、
六角状芯材２の周りにセパレータ４ａ、４ｂを一周以上
捲き付けた後、正極板５、負極板６及びセパレータ４
ａ、４ｂを図１の矢印Ｂ方向に送出して、六角状芯材２
の周りに断面が略六角扁平形状の扁平状捲回群７Ａが形
成されるように捲回する。正極板５、負極板６及びセパ
レータ４ａ、４ｂは所定長さで切断される。このとき、
セパレータ４ａ、４ｂを切断する際に熱ヒータ等を用い
ることで、切断端部が溶着される。扁平状捲回群７Ａの
最外周部となるセパレータを片面テープで固定する。次
に、捲回軸片１Ａ及び捲回軸片１Ｂの左右のずれを揃え
た後、図２（Ａ）に示すように、捲回軸１から六角状芯
材２ごと扁平状捲回群７Ａを取り出す。このとき、六角
状芯材２及び扁平状捲回群７Ａの接触面は全周接触した
状態である。When the winding shaft 1 is rotated in the direction of arrow A in FIG.
After winding the separators 4a and 4b one or more times around the hexagonal core material 2, the positive electrode plate 5, the negative electrode plate 6, and the separator 4
a, 4b in the direction of arrow B in FIG.
Is wound so that a flat-shaped winding group 7A having a substantially hexagonal flat cross section is formed. The positive electrode plate 5, the negative electrode plate 6, and the separators 4a and 4b are cut at a predetermined length. At this time,
By using a heat heater or the like when cutting the separators 4a and 4b, the cut ends are welded. The outermost peripheral portion of the flat wound group 7A is fixed with a single-sided tape. Next, after aligning the left and right displacements of the wound shaft piece 1A and the wound shaft piece 1B, as shown in FIG. 2A, the flat wound group 7A including the hexagonal core material 2 from the wound shaft 1 is formed. Take out. At this time, the contact surfaces of the hexagonal core material 2 and the flat wound group 7A are in a state of being in contact with the entire circumference.
【００１７】次に、図２（Ａ）、（Ｂ）に示すように、
扁平状捲回群７Ａを六角状芯材２ごと上側方向から押し
潰して、扁平捲回群１０を製造する。このとき、六角状
芯材２は押し潰されて隙間なく接触した板状芯材２Ａと
なり、板状芯材２Ａの全周はセパレータ４ａの最内周に
密着する構造となる。Next, as shown in FIGS. 2A and 2B,
The flat wound group 7A is crushed together with the hexagonal core material 2 from the upper direction to manufacture the flat wound group 10. At this time, the hexagonal core material 2 is crushed and becomes a plate-shaped core material 2A that is in contact with no gap, and the entire circumference of the plate-shaped core material 2A is in close contact with the innermost circumference of the separator 4a.
【００１８】扁平捲回群１０の正負極板からそれぞれ導
出された集電用のタブを正負極集電体に溶接した後、扁
平捲回群１０を、深絞り加工で成形した後内面を含めて
ニッケルの電気メッキを施した扁平状のＳＰＣＣ（冷間
圧延鋼鈑）製電池容器に挿入し、電池容器の内側上方か
ら扁平捲回群１０の移動を抑制する部材を配置し、該部
材を板状芯材２Ａに当接して固定する。その後、非水電
解液を所定量注入して、電池蓋をカシメ封口することに
より、所定容量の扁平型リチウムイオン電池が組み立て
られる。なお、非水電解液には、エチレンカーボネート
（ＥＣ）とジメチルカーボネート（ＤＭＣ）との混合有
機溶媒に、電解質として６フッ化リン酸リチウム（Ｌｉ
ＰＦ６）を１モル／リットル溶解したものを用いた。After the current collecting tabs respectively drawn from the positive and negative electrode plates of the flat wound group 10 are welded to the positive and negative electrode current collectors, the flat wound group 10 is formed by deep drawing and includes the inner surface. Into a flat SPCC (cold rolled steel plate) battery container which has been subjected to nickel electroplating, and a member for suppressing the movement of the flat wound group 10 from above the inside of the battery container is arranged. It abuts on and fixes the plate-shaped core material 2A. Thereafter, a predetermined amount of a non-aqueous electrolyte is injected, and the battery lid is closed by caulking to assemble a flat lithium ion battery having a predetermined capacity. The non-aqueous electrolytic solution contains a mixed organic solvent of ethylene carbonate (EC) and dimethyl carbonate (DMC) and lithium hexafluorophosphate (Li) as an electrolyte.
PF 6 ) dissolved at 1 mol / l was used.
【００１９】本実施形態では、六角状芯材２ごと扁平状
捲回群７Ａを押し潰すことで、六角状芯材２はセパレー
タ４ａと全周で密着し、かつ、六角状芯材２内部に存在
していた隙間のない板状芯材２Ａとなるので、扁平型リ
チウムイオン電池の体積効率を高めることができると共
に、板状芯材２Ａを電池内部で固定したので、耐振性に
優れた扁平型リチウムイオン電池を得ることができる。In the present embodiment, the hexagonal core 2 is squashed together with the hexagonal core 2 so that the hexagonal core 2 is in close contact with the separator 4a all around, and Since the plate-shaped core material 2A having no gap is present, the volume efficiency of the flat-type lithium ion battery can be increased, and the flat core material 2A is fixed inside the battery, so that the flat-type lithium ion battery has excellent vibration resistance. Type lithium ion battery can be obtained.
【００２０】また、本実施形態では、六角状芯材２には
扁平状捲回群７Ａが密着しており、これを押し潰した状
態の板状芯材２Ａにも扁平捲回群７Ｂが密着しているの
で、芯材と扁平捲回群の最内周のセパレータとの接着時
の位置合わせが不要となり、扁平捲回群の量産性を高め
ることができる。In the present embodiment, the flat wound group 7A is in close contact with the hexagonal core member 2, and the flat wound group 7B is also in close contact with the crushed plate core member 2A. This eliminates the need for alignment between the core material and the innermost separator of the flat wound group at the time of bonding, thereby improving the mass productivity of the flat wound group.
【００２１】更に、本実施形態では、板状芯材２Ａの介
在により、扁平捲回群７Ｂの内周側の正負極板の湾曲が
制限されるので、押し潰したときに正負極板に損傷を与
えることもない。Further, in the present embodiment, the curvature of the positive and negative electrode plates on the inner peripheral side of the flat wound group 7B is limited by the interposition of the plate-shaped core material 2A, so that the positive and negative electrode plates are damaged when crushed. I do not give.
【００２２】なお、本実施形態では、六角状芯材２の材
料に厚さ１ｍｍ以下の金属製薄肉円筒又は厚さ２ｍｍ以
下の合成樹脂製薄肉円筒を用いた例を示したが、六角状
芯材２の材料は捲回軸１に、変形させて又はそのまま挿
入されればよいので、円筒状の薄肉に限らず種々の筒体
形状を採ることができる。これらの材質は電池に必要と
される耐熱性・耐振性等に応じて、例えば、ＳＵＳ３０
４等のステンレスやＰＰ樹脂等の合成樹脂を使用するこ
とができる。In this embodiment, an example in which a thin metal cylinder having a thickness of 1 mm or less or a thin cylinder made of synthetic resin having a thickness of 2 mm or less is used as the material of the hexagonal core material 2 has been described. Since the material of the material 2 may be deformed or inserted as it is into the winding shaft 1, it is possible to take various cylindrical shapes without being limited to a thin cylindrical shape. These materials may be selected depending on the heat resistance and vibration resistance required for the battery, for example, SUS30.
A synthetic resin such as stainless steel such as No. 4 or PP resin can be used.
【００２３】また、厚さ１ｍｍ以下の金属製薄肉円筒又
は厚さ２ｍｍ以下の合成樹脂製薄肉円筒を用いること
で、捲回時の正極板５、負極板６及びセパレータ４ａ、
４ｂからの張力に対して実用上十分な強度を得ることが
できると共に、押し潰されて板状芯材２Ａとされたとき
にも、薄くかつ十分な強度を得ることができる。更に、
薄肉筒体として、例えば、ＰＰ樹脂を用いても実用上十
分な強度が得られる比較的小型の扁平電池の場合には、
両面接着テープを用いずに、セパレータ４ａ、４ｂとＰ
Ｐ樹脂とを熱溶着することにより、製作工数を低減させ
ることができる。By using a thin metal cylinder having a thickness of 1 mm or less or a thin synthetic resin cylinder having a thickness of 2 mm or less, the positive electrode plate 5, the negative electrode plate 6, the separator 4a,
4b, it is possible to obtain a practically sufficient strength against the tension from 4b, and it is possible to obtain a thin and sufficient strength when crushed into the plate-shaped core material 2A. Furthermore,
As a thin cylindrical body, for example, in the case of a relatively small flat battery which can obtain practically sufficient strength even when using PP resin,
Separator 4a, 4b and P
By heat welding with the P resin, the number of manufacturing steps can be reduced.
【００２４】更に、本実施形態では、両面接着テープを
４箇所に貼り付けた例を示したが、本発明はこれに限定
されることなく、少なくとも１箇所に両面接着テープを
貼り付けるようにすればよい。Further, in the present embodiment, an example is shown in which the double-sided adhesive tape is attached to four places. However, the present invention is not limited to this, and the double-sided adhesive tape is attached to at least one place. I just need.
【００２５】（第２実施形態）次に、電気自動車に搭載
される扁平型リチウムイオン電池の製造に、本発明に係
る扁平捲回群製造方法を適用した第２の実施の形態につ
いて説明する。なお、本実施形態において第１実施形態
と同一の部材には同一の符号を付してその説明を省略
し、異なる箇所のみ説明する。(Second Embodiment) Next, a second embodiment in which the flat wound group manufacturing method according to the present invention is applied to the manufacture of a flat lithium ion battery mounted on an electric vehicle will be described. In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different points will be described.
【００２６】図３に示すように、本実施形態で使用する
捲回装置は、捲回軸１１を構成する一方の捲回軸片１Ｃ
の外周面に矩形溝状の凹部１ａが形成されている。更
に、凹部１ａの内部には矩形溝状のテープ収容溝として
の小凹部１ｂが形成されている。As shown in FIG. 3, the winding device used in the present embodiment includes one of the winding shaft pieces 1C constituting the winding shaft 11.
Is formed with a rectangular groove-shaped concave portion 1a on the outer peripheral surface thereof. Further, a small concave portion 1b as a rectangular groove-shaped tape accommodating groove is formed inside the concave portion 1a.
【００２７】まず、扁平捲回群の芯材となる平板状芯材
１２を準備しておく。平板状芯材１２の材質としては、
扁平型リチウムイオン電池に必要とされる耐熱性等に応
じ、例えば、ＰＰ樹脂等の合成樹脂製平板、ＳＵＳ３０
４等の金属製平板、アルミナセラミック等のセラミック
製平板等を使用することができる。平板状芯材１２の両
面の所定箇所に両面接着テープ３を貼り付ける。次に、
凹部１ａに平板状芯材１２を載置する。このとき、平板
状芯材１２の片面に貼り付けられた両面接着テープ３
は、小凹部１ｂ内に収容される。小凹部１ｂに両面接着
テープ３が収容されることにより、両面接着テープ１３
と捲回軸片１Ｃとの接着が防止される。First, a flat core material 12 to be the core material of the flat wound group is prepared. As the material of the flat core material 12,
For example, a flat plate made of synthetic resin such as PP resin, SUS30
For example, a metal flat plate such as No. 4 or a ceramic flat plate such as alumina ceramic can be used. The double-sided adhesive tape 3 is attached to predetermined positions on both sides of the flat core material 12. next,
The flat core material 12 is placed in the concave portion 1a. At this time, the double-sided adhesive tape 3 stuck on one side of the flat core material 12
Is accommodated in the small recess 1b. Since the double-sided adhesive tape 3 is accommodated in the small recess 1b, the double-sided adhesive tape 13
And the wound shaft piece 1C are prevented from being bonded to each other.
【００２８】次に、捲回軸片１Ｃ、１Ｂを左右にずら
し、捲回軸１を図２の矢印Ａ方向に回転させ、捲回軸１
の周りにセパレータ４ａ、４ｂを一周以上捲き付けた
後、正極板５、負極板６及びセパレータ４ａ、４ｂを図
１の矢印Ｂ方向に送出して、捲回軸１の周りに断面が略
六角扁平形状の扁平状捲回群が形成されるように捲回し
（図５（Ａ）も参照）、正極板５、負極板６及びセパレ
ータ４ａ、４ｂを所定長さで切断した後、最外周部とな
るセパレータを片面テープで固定する。続いて、捲回軸
片１Ｃ及び捲回軸片１Ｂの左右のずれを揃えた後、図４
（Ａ）に示すように、平板状芯材１２が両面接着テープ
１３で接着された扁平状捲回群７Ｃを取り出す。捲回軸
片１Ｃ及び捲回軸片１Ｂの左右のずれを揃えることによ
り、断面が略六角扁平形状の扁平状捲回群は変形して略
楕円状の扁平状捲回群７Ｃとなる。Next, the winding shaft pieces 1C and 1B are shifted left and right, and the winding shaft 1 is rotated in the direction of arrow A in FIG.
After the separators 4a and 4b are wound around the circumference one or more times, the positive electrode plate 5, the negative electrode plate 6, and the separators 4a and 4b are sent out in the direction of arrow B in FIG. After being wound to form a flat-shaped flat-shaped winding group (see also FIG. 5A), the positive electrode plate 5, the negative electrode plate 6, and the separators 4a and 4b are cut to a predetermined length, and then the outermost peripheral portion is formed. Is fixed with a single-sided tape. Subsequently, after aligning the left and right displacements of the wound shaft piece 1C and the wound shaft piece 1B, FIG.
As shown in (A), the flat wound group 7C to which the flat core material 12 is adhered with the double-sided adhesive tape 13 is taken out. By aligning the left and right displacements of the wound shaft piece 1C and the wound shaft piece 1B, the flat winding group having a substantially hexagonal flat cross section is deformed into a substantially elliptical flat winding group 7C.
【００２９】次いで、図４（Ａ）、（Ｂ）に示すよう
に、扁平状捲回群７Ｃを平板状芯材１２ごと上側方向か
ら押し潰して、扁平捲回群２０を製造する。このとき、
平面状芯材１２の下側（裏面側）に貼り付けられた両面
接着テープ１３とセパレータ４ａの最内周は接着され、
平板状芯材１２は両面接着テープ１３を介してセパレー
タ４ａの最内周に密着する。Next, as shown in FIGS. 4 (A) and 4 (B), the flat wound group 7C is crushed together with the flat core material 12 from the upper side to manufacture the flat wound group 20. At this time,
A double-sided adhesive tape 13 attached to the lower side (back side) of the planar core material 12 and the innermost periphery of the separator 4a are adhered,
The flat core material 12 is in close contact with the innermost periphery of the separator 4a via the double-sided adhesive tape 13.
【００３０】第１実施形態と同様に、この扁平捲回群２
０を電池容器に収容し、平板状芯材１２を固定した後、
非水電解液を注入して封口することにより、所定容量の
扁平型リチウムイオン電池が組み立てられる。As in the first embodiment, this flat wound group 2
0 in a battery container, and after fixing the flat core material 12,
By injecting and sealing the non-aqueous electrolyte, a flat lithium ion battery having a predetermined capacity is assembled.
【００３１】本実施形態では、扁平状捲回群を押し潰す
ことで、平板状芯材１２は両面接着テープ１３を介して
セパレータ４ａと全周で密着するので、扁平型リチウム
イオン電池の体積効率を高めることができると共に、平
板状芯材１２を電池内部で固定したので、耐振性に優れ
た扁平型リチウムイオン電池を得ることができる。更
に、平板状芯材１２は薄い板状の形状であっても、小凹
部１ｂを除く凹部１ａの全面で支持されるので、捲回時
の正極板５、負極板６及びセパレータ４ａ、４ｂからの
張力に対して実用上十分な強度を得ることができる。In the present embodiment, since the flat core material 12 comes into close contact with the separator 4a via the double-sided adhesive tape 13 over the entire circumference by crushing the flat winding group, the volume efficiency of the flat lithium ion battery is reduced. And the flat core material 12 is fixed inside the battery, so that a flat lithium ion battery excellent in vibration resistance can be obtained. Furthermore, even if the flat core material 12 is in the shape of a thin plate, it is supported on the entire surface of the concave portion 1a except for the small concave portion 1b, so that the positive electrode plate 5, the negative electrode plate 6, and the separators 4a and 4b are wound. Practically sufficient strength can be obtained with respect to the tension.
【００３２】また、本実施形態では、扁平状捲回群を押
し潰すことで、両面接着テープ１３が最内周のセパレー
タ４ａに自動的に接着されるので、芯材と扁平捲回群の
最内周のセパレータとの接着時の位置合わせが不要とな
り、扁平捲回群の量産性を高めることができる。In the present embodiment, the double-sided adhesive tape 13 is automatically bonded to the innermost separator 4a by crushing the flat-shaped winding group. Positioning at the time of bonding to the inner peripheral separator is not required, and mass productivity of the flat wound group can be improved.
【００３３】更に、本実施形態では、平板状芯材１２の
介在により、扁平状捲回群７Ｃの内周側の正負極板の湾
曲が制限されるので、押し潰したときに正負極板に損傷
を与えることもない。Furthermore, in the present embodiment, the curvature of the positive and negative electrode plates on the inner peripheral side of the flat wound group 7C is limited by the interposition of the flat core material 12, so that the positive and negative electrode plates are crushed when crushed. No damage.
【００３４】なお、本実施形態では、平板状芯材１２の
両面に両面接着テープ１３を用いた例を示したが、平板
状芯材１２の片面に両面接着テープ１３を貼り付けて平
板状捲回群７Ｃに平板状芯材１２を接着させておき、扁
平状捲回群７Ｃを押し潰す前に他面に両面接着テープ１
３を貼り付けるようにしてもよい。このような実施態様
に用いられる捲回装置には小凹部１ｂを形成する必要は
ない。In the present embodiment, an example in which the double-sided adhesive tape 13 is used on both sides of the flat core material 12 has been described. The flat core material 12 is adhered to the winding group 7C, and the double-sided adhesive tape 1 is applied to the other surface before the flat winding group 7C is crushed.
3 may be attached. It is not necessary to form the small recess 1b in the winding device used in such an embodiment.
【００３５】[0035]
【実施例】次に、上記実施形態に従って作製した実施例
の電池について説明する。なお、比較のために作製した
比較例の電池についても併記する。EXAMPLE Next, an example battery manufactured according to the above embodiment will be described. The battery of the comparative example produced for comparison is also described.
【００３６】（実施例１）下表１に示すように、実施例
１では、第１実施形態に対応して、薄肉円筒に厚さ０．
２ｍｍ、内径２５．５ｍｍ、高さ９２ｍｍのステンレス
製（ＳＵＳ３０４）のシームレス円筒を用いた。押し潰
した後の扁平捲回群１０の厚さは１９．５ｍｍであっ
た。電池容器には、厚さ０．５ｍｍのＳＰＣＣを用い
て、外寸が厚さ２０．５ｍｍ、幅６２ｍｍ、高さ１１０
ｍｍのリチウムイオン電池を作製した。この電池の容量
は６Ａｈであり、体積効率を表す電池体積に対する電池
容量の比は、４２．９Ａｈ／ｌであった。(Example 1) As shown in Table 1 below, in Example 1, corresponding to the first embodiment, a thin cylinder having a thickness of 0.1 mm was used.
A stainless steel (SUS304) seamless cylinder having a diameter of 2 mm, an inner diameter of 25.5 mm, and a height of 92 mm was used. The flat wound group 10 after crushing had a thickness of 19.5 mm. For the battery container, using a 0.5 mm thick SPCC, the outer dimensions were 20.5 mm in thickness, 62 mm in width, and 110 mm in height.
mm was manufactured. The capacity of this battery was 6 Ah, and the ratio of the battery capacity to the battery volume representing the volume efficiency was 42.9 Ah / l.
【００３７】[0037]
【表１】 [Table 1]
【００３８】（実施例２）表１に示すように、実施例２
では、第１実施形態に対応して、平板状芯材１２に、厚
さ１ｍｍ、幅４０ｍｍ、高さ９２ｍｍのアルミナセラミ
ックの板を用いた。得られた扁平型捲回群の厚さは２０
ｍｍである。電池容器には、厚さ０．５ｍｍのＳＰＰＣ
を用いて、外寸が厚さ２１ｍｍ、幅６２ｍｍ、高さ１１
０ｍｍのリチウムイオン電池を作製した。この電池の容
量は６Ａｈであり、体積効率は４１．９Ａｈ／ｌであっ
た。Example 2 As shown in Table 1, Example 2
In this embodiment, an alumina ceramic plate having a thickness of 1 mm, a width of 40 mm, and a height of 92 mm was used as the flat core member 12 in accordance with the first embodiment. The thickness of the obtained flat wound group is 20
mm. The battery container contains a 0.5mm thick SPPC
The outer dimensions are 21 mm in thickness, 62 mm in width and 11 in height.
A 0 mm lithium ion battery was produced. The capacity of this battery was 6 Ah, and the volume efficiency was 41.9 Ah / l.
【００３９】（比較例１）表１に示すように、比較例１
では、図５に示した芯材のない扁平捲回群７Ｄを用いて
電池を作製した。扁平捲回群７Ｄの厚さは、実施例１と
同様に、１９．５ｍｍであった。上述したように、中心
の空間がない状態まで押し潰すと極板が損傷するため捲
回群の厚さとしては実施例１と同一とせざるを得なかっ
たからである。電池容器の外寸は、厚さ２０．５ｍｍ、
幅６２ｍｍ、高さ１１０ｍｍとした。この電池の容量は
６Ａｈであり、体積効率は、４２．９Ａｈ／ｌであっ
た。Comparative Example 1 As shown in Table 1, Comparative Example 1
Then, a battery was manufactured using the flat wound group 7D having no core material shown in FIG. The thickness of the flat wound group 7D was 19.5 mm, as in Example 1. As described above, the electrode plate is damaged when crushed to a state where there is no center space, so that the thickness of the wound group has to be the same as that of the first embodiment. The outer dimensions of the battery container are 20.5 mm thick,
The width was 62 mm and the height was 110 mm. The capacity of this battery was 6 Ah, and the volumetric efficiency was 42.9 Ah / l.
【００４０】（比較例２）表１に示すように、比較例２
では、図６に示したＰＰ樹脂製芯材３１を有する扁平捲
回群７Ｇを用いて電池を作製した。扁平捲回群７Ｇの厚
さは、２３ｍｍであった。ＰＰ樹脂製芯材３１には、厚
さ４ｍｍ、幅４０ｍｍ、高さ９２ｍｍの射出成形品を用
いた。電池容器の外寸は、厚さ２４ｍｍ、幅６２ｍｍ、
高さ１１０ｍｍであった。この電池の容量は６Ａｈであ
り、体積効率は３６．７Ａｈ／ｌである。Comparative Example 2 As shown in Table 1, Comparative Example 2
Then, a battery was manufactured using the flat wound group 7G having the PP resin core material 31 shown in FIG. The thickness of the flat wound group 7G was 23 mm. As the PP resin core material 31, an injection molded product having a thickness of 4 mm, a width of 40 mm, and a height of 92 mm was used. The outer dimensions of the battery container are 24 mm thick, 62 mm wide,
The height was 110 mm. The capacity of this battery is 6 Ah and the volume efficiency is 36.7 Ah / l.
【００４１】＜試験・評価＞次に、以上のように作製し
た実施例及び比較例の各電池について、それぞれ１００
個の電池を振動試験機の台座に同一の方法で固定し、２
Ｇの加速度で４８時間加振して電池の耐振性を調べる振
動試験を行った。下表２に振動試験の試験結果を示す。<Test / Evaluation> Next, each of the batteries of Examples and Comparative Examples manufactured as described above was 100
The batteries are fixed to the base of the vibration testing machine in the same
A vibration test was conducted to examine the vibration resistance of the battery by applying vibration at an acceleration of G for 48 hours. Table 2 below shows the test results of the vibration test.
【００４２】[0042]
【表２】 [Table 2]
【００４３】比較例１の電池は、１００個中８３個が充
放電不能となり故障したのに対して、実施例１、実施例
２及び比較例２の電池は、それぞれ１００個全てに異常
がなかった。In the battery of Comparative Example 1, 83 out of 100 batteries could not be charged and discharged and failed, whereas the batteries of Examples 1, 2 and Comparative Example 2 all had no abnormality. Was.
【００４４】実施例１及び実施例２の電池では、扁平型
捲回群の最内周セパレータと幅広く密着している押し潰
された厚さの薄いシームレス円筒、アルミナセラミック
の板を電池容器に固定することで、集電用のタブの折損
を防止できるので、耐振性に優れた電池であることが分
かった。また、実施例１の電池では、シームレス円筒を
用いて、扁平捲回群の厚さを薄くできるので、比較例２
に比べて、体積効率が１７％向上している。また、実施
例２の電池では、捲回時の張力がアルミナセラミックの
板に掛からず、厚さを薄くすることができるので、比較
例２に比べて、体積効率が１４％向上している。更に、
シームレス円筒又はアルミナセラミックの板ごと捲回群
を捲回軸から取り出すことができるため、捲回群の最内
周のセパレータとシームレス円筒又はアルミナセラミッ
クの板との接着時の位置合わせをする必要がないので、
量産化が容易となる。従って、実施例１及び実施例２の
電池は、耐振性を備えた上に、体積効率に優れているこ
とが確かめられた。In the batteries of Example 1 and Example 2, a thin, crushed, seamless cylinder, alumina ceramic plate, which is widely in close contact with the innermost separator of the flat type winding group, is fixed to the battery container. By doing so, the breakage of the current collecting tab can be prevented, and thus the battery was found to be excellent in vibration resistance. Further, in the battery of Example 1, the thickness of the flat wound group can be reduced by using the seamless cylinder.
, The volume efficiency is improved by 17%. Further, in the battery of Example 2, since the tension at the time of winding was not applied to the alumina ceramic plate and the thickness could be reduced, the volume efficiency was improved by 14% as compared with Comparative Example 2. Furthermore,
Since the winding group can be taken out from the winding shaft together with the seamless cylinder or the alumina ceramic plate, it is necessary to align the innermost separator of the winding group with the seamless cylinder or the alumina ceramic plate at the time of bonding. Since there is no,
Mass production becomes easy. Therefore, it was confirmed that the batteries of Example 1 and Example 2 had excellent vibration resistance and excellent volumetric efficiency.
【００４５】[0045]
【発明の効果】以上説明したように、本発明の第１の態
様によれば、薄肉捲胴体ごと扁平状捲回群を押し潰すこ
とにより、扁平状捲回群内の薄肉捲胴体も押し潰され最
内周のセパレータと全周で密着する構造となるので、扁
平捲回群を薄くすることができ、体積効率を高めること
ができると共に、薄肉捲胴体を電池内部で固定すること
で、耐振性に優れた電池を得ることができる、という効
果を得ることができる。また、本発明の第２の態様によ
れば、芯材が捲回軸のうち少なくとも一方の捲回軸に形
成された凹部に収容されているので、捲回時に芯材に掛
かる極板やセパレータからの張力が小さいので、芯材を
薄くすることができ、扁平捲回群の体積効率を高めるこ
とができると共に、扁平状捲回群を押し潰すことで芯材
が扁平状捲回群の最内周のセパレータと密着する構造と
なるので、芯材を電池内部で固定することで、耐振性に
優れた電池を得ることができる、という効果を得ること
ができる。As described above, according to the first aspect of the present invention, by crushing the flat winding group together with the thin winding body, the thin winding body in the flat winding group is also crushed. The structure is in close contact with the innermost separator on the entire circumference, so that the flat winding group can be made thinner and the volume efficiency can be increased, and by fixing the thin-walled winding body inside the battery, vibration resistance can be improved. The effect that the battery excellent in the property can be obtained can be obtained. Further, according to the second aspect of the present invention, since the core material is accommodated in the concave portion formed on at least one of the winding shafts, the electrode plate or the separator that is hung on the core material at the time of winding. Since the tension from the core is small, the core material can be thinned, the volume efficiency of the flat wound group can be increased, and the core material can be collapsed by crushing the flat wound group. Since the structure is in close contact with the inner peripheral separator, by fixing the core material inside the battery, it is possible to obtain an effect that a battery having excellent vibration resistance can be obtained.
【図１】第１実施形態の扁平捲回群製造方法に使用され
る捲回装置の捲回軸の断面図である。FIG. 1 is a sectional view of a winding shaft of a winding device used in a method of manufacturing a flat wound group according to a first embodiment.
【図２】（Ａ）は第１実施形態の扁平捲回群製造方法に
使用される捲回装置で捲回された扁平状捲回群の断面図
であり、（Ｂ）は扁平状捲回群を押し潰した扁平捲回群
の断面図である。FIG. 2A is a cross-sectional view of a flat wound group wound by a winding device used in the method of manufacturing a flat wound group according to the first embodiment, and FIG. 2B is a flat wound group. It is sectional drawing of the flat wound group which crushed the group.
【図３】第２実施形態の扁平捲回群製造方法に使用され
る捲回装置の捲回軸の断面図である。FIG. 3 is a cross-sectional view of a winding shaft of a winding device used in a method of manufacturing a flat wound group according to a second embodiment.
【図４】（Ａ）は第２実施形態の扁平捲回群製造方法に
使用される捲回装置で捲回された扁平状捲回群の断面図
であり、（Ｂ）は扁平状捲回群を押し潰した扁平捲回群
の断面図である。FIG. 4A is a cross-sectional view of a flat wound group wound by a winding device used in a method of manufacturing a flat wound group according to a second embodiment, and FIG. 4B is a flat wound group. It is sectional drawing of the flat wound group which crushed the group.
【図５】（Ａ）は従来の捲回装置で捲回された捲回終了
時の扁平状捲回群の断面図であり、（Ｂ）は捲回軸を揃
えた時の扁平状捲回群の断面図であり、（Ｃ）は扁平捲
回群を捲回軸から取り外した時の扁平状捲回群の断面図
であり、（Ｄ）は扁平状捲回群を押し潰したときの扁平
捲回群の断面図である。FIG. 5 (A) is a cross-sectional view of a flat winding group at the end of winding wound by a conventional winding device, and (B) is a flat winding when winding axes are aligned. It is sectional drawing of a group, (C) is sectional drawing of a flat wound group when the flat wound group is removed from a winding shaft, (D) is when the flat wound group is crushed. It is sectional drawing of a flat wound group.
【図６】ＰＰ樹脂製芯材を軸芯とする従来の扁平捲回群
の断面図である。FIG. 6 is a cross-sectional view of a conventional flat wound group having a PP resin core as a shaft core.
１、１１ 捲回軸 １Ａ、１Ｂ、１Ｃ 捲回軸片 １ａ 凹部 １ｂ 小凹部 ２ 六角状芯材 ２Ａ 板状芯材 ３、１３ 両面接着テープ ４ａ、４ｂ セパレータ ５ 正極板 ６ 負極板 ７Ａ、７Ｃ 扁平状捲回群 １０、２０ 扁平捲回群 １２ 平板状芯材 DESCRIPTION OF SYMBOLS 1, 11 Winding axis 1A, 1B, 1C Winding axis piece 1a Depression 1b Small depression 2 Hexagonal core material 2A Plate-shaped core material 3, 13 Double-sided adhesive tape 4a, 4b Separator 5 Positive electrode plate 6 Negative electrode plate 7A, 7C Flat Winding group 10, 20 Flat winding group 12 Flat core material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山田 和博 東京都中央区日本橋本町二丁目８番７号 新神戸電機株式会社内 Ｆターム(参考） 5H024 BB09 BB14 BB18 CC06 CC07 CC12 DD09 5H028 AA05 BB05 BB07 CC07 CC08 CC10 HH05 5H029 AK03 AL06 AM03 AM05 AM07 BJ02 BJ14 CJ03 CJ05 CJ07 CJ28 CJ30 DJ04 DJ14 HJ04 HJ12 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhiro Yamada 2-7-7 Nihonbashi Honcho, Chuo-ku, Tokyo F-term in Shin-Kobe Electric Machinery Co., Ltd. 5H024 BB09 BB14 BB18 CC06 CC07 CC12 DD09 5H028 AA05 BB05 BB07 CC07 CC08 CC10 HH05 5H029 AK03 AL06 AM03 AM05 AM07 BJ02 BJ14 CJ03 CJ05 CJ07 CJ28 CJ30 DJ04 DJ14 HJ04 HJ12
Claims (8)
極板及びセパレータを捲き付けて扁平状捲回群を作製
し、該扁平状捲回群を押し潰して扁平捲回群を製造する
扁平捲回群製造方法であって、前記扁平捲回群の軸芯と
なる薄肉捲胴体を前記捲回軸の外周に当接する形状に変
形させ、前記薄肉捲胴体を介して前記捲回軸に前記極板
及びセパレータを捲き付けて捲回した後、前記薄肉捲胴
体ごと前記扁平状捲回群を前記捲回軸から取り外すステ
ップを含むことを特徴とする扁平捲回群製造方法。1. A flat winding group is prepared by winding an electrode plate and a separator on a winding device having a pair of flat winding shafts, and the flat winding group is crushed to form a flat winding group. A flat wound group manufacturing method for manufacturing, wherein the thin wound body serving as a shaft core of the flat wound group is deformed into a shape in contact with an outer periphery of the wound shaft, and the winding is performed through the thin wound body. A method of manufacturing a flat wound group, comprising a step of winding the electrode plate and the separator around a shaft and removing the flat wound group together with the thin winding body from the winding shaft.
属製薄肉筒体又は厚さ２ｍｍ以下の合成樹脂製薄肉筒体
を用いることを特徴とする請求項１に記載の扁平捲回群
製造方法。2. The flat wound group according to claim 1, wherein a metal thin cylinder having a thickness of 1 mm or less or a synthetic resin thin cylinder having a thickness of 2 mm or less is used for the thin winding body. Production method.
面接着テープを貼付するか又は前記セパレータを溶着し
てから前記極板及びセパレータを捲き付けて捲回するこ
とを特徴とする請求項１又は請求項２に記載の扁平捲回
群製造方法。3. The method according to claim 1, wherein a double-sided adhesive tape is attached to the outer surface of the deformed thin-walled winding body, or the separator is welded, and then the electrode plate and the separator are wound and wound. The flat wound group manufacturing method according to claim 1 or 2.
ことにより、前記薄肉捲胴体を前記捲回軸の外周に当接
する形状に変形させることを特徴とする請求項１乃至請
求項３のいずれか１項に記載の扁平捲回群製造方法。4. The thin-walled winding body is deformed into a shape in contact with an outer periphery of the winding shaft by moving the winding shafts to opposite sides. The method for producing a flat wound group according to any one of the preceding claims.
極板及びセパレータを捲き付けて扁平状捲回群を作製
し、該扁平状捲回群を押し潰して扁平捲回群を製造する
扁平捲回群製造方法であって、前記捲回軸のうち少なく
とも一方の捲回軸には前記極板及びセパレータが捲き付
けられる外周面に凹部が形成されており、該凹部に前記
扁平捲回群の軸芯となる平板状芯材を収容し、前記捲回
軸に前記極板及びセパレータを捲き付けて捲回した後、
前記芯材ごと前記扁平状捲回群を前記捲回軸から取り外
すステップを含むことを特徴とする扁平捲回群製造方
法。5. A flat winding group is prepared by winding an electrode plate and a separator on a winding device having a pair of flat winding shafts, and the flat winding group is crushed to form a flat winding group. A flat wound group manufacturing method for manufacturing, wherein at least one of the winding shafts has a concave portion formed on an outer peripheral surface around which the electrode plate and the separator are wound, and the flat portion has the flat portion. After accommodating a flat core material serving as the shaft core of the winding group, and winding the electrode plate and the separator around the winding shaft,
Removing the flat wound group together with the core material from the winding shaft.
着テープを貼り付けてから前記捲回軸に前記極板及びセ
パレータを捲き付けて捲回した後、前記芯材ごと前記扁
平状捲回群を前記捲回装置から取り外し、前記扁平状捲
回群を押し潰して前記芯材の裏面側に貼り付けられた両
面接着テープと前記セパレータの最内周とを接着するこ
とを特徴とする請求項５に記載の扁平捲回群製造方法。6. After the double-sided adhesive tape is attached to the back surface side of the outer peripheral surface of the core material, the electrode plate and the separator are wound around the winding shaft and wound, and then the flat material together with the core material is formed. The winding group is removed from the winding device, and the flattened winding group is crushed to bond a double-sided adhesive tape attached to the back surface side of the core material and the innermost circumference of the separator, The method for producing a flat wound group according to claim 5.
パレータを捲き付けて扁平状捲回群を作製する捲回装置
において、前記捲回軸のうち少なくとも一方の捲回軸に
前記極板及びセパレータが捲き付けられる外周面に前記
扁平状捲回群の軸芯となる平板状芯材を収容する凹部が
形成されたことを特徴とする捲回装置。7. A winding device having a pair of flat winding shafts and winding a plate and a separator to form a flat winding group, wherein at least one of the winding shafts is provided on at least one of the winding shafts. A winding device, wherein a recess for accommodating a flat core material serving as a shaft core of the flat winding group is formed on an outer peripheral surface around which the electrode plate and the separator are wound.
れる両面接着テープを収容するテープ収容溝が形成され
たことを特徴とする請求項７に記載の捲回装置。8. The winding device according to claim 7, wherein a tape accommodating groove for accommodating a double-sided adhesive tape attached to the shaft core is further formed in the concave portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001080325A JP4972824B2 (en) | 2001-03-21 | 2001-03-21 | Flat winding group manufacturing method and winding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001080325A JP4972824B2 (en) | 2001-03-21 | 2001-03-21 | Flat winding group manufacturing method and winding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002280055A true JP2002280055A (en) | 2002-09-27 |
| JP4972824B2 JP4972824B2 (en) | 2012-07-11 |
Family
ID=18936625
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001080325A Expired - Fee Related JP4972824B2 (en) | 2001-03-21 | 2001-03-21 | Flat winding group manufacturing method and winding apparatus |
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