JP3457461B2 - Non-aqueous electrolyte secondary battery and assembled battery - Google Patents
Non-aqueous electrolyte secondary battery and assembled batteryInfo
- Publication number
- JP3457461B2 JP3457461B2 JP10354596A JP10354596A JP3457461B2 JP 3457461 B2 JP3457461 B2 JP 3457461B2 JP 10354596 A JP10354596 A JP 10354596A JP 10354596 A JP10354596 A JP 10354596A JP 3457461 B2 JP3457461 B2 JP 3457461B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- aqueous electrolyte
- electrolyte secondary
- electrode
- assembled
- 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.)
- Expired - Fee Related
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
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、組電池化した場合
の体積エネルギー密度が高く、充放電サイクル特性に優
れる非水電解質二次電池及び該二次電池を複数組合わせ
た組電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous electrolyte secondary battery which has a high volume energy density when assembled into a battery and is excellent in charge / discharge cycle characteristics, and a battery pack in which a plurality of such secondary batteries are combined.
【０００２】[0002]
【従来の技術】近年、電子機器の小型化、ポータブル化
が進み、これらの駆動用電源として小型・軽量で、高エ
ネルギー密度を有し、充放電サイクル特性に優れた長寿
命の二次電池への要望が高い。そこで、最近、リチウム
やリチウム合金、又は炭素材料等のリチウムイオンのド
ープ・脱ドープが可能な物質を負極活物質として用い、
リチウムコバルト複合酸化物等のリチウム複合酸化物を
正極活物質として使用する非水電解質二次電池の研究・
開発が行われており、既に実用化されているものもあ
る。2. Description of the Related Art In recent years, electronic devices have become smaller and more portable, and as a power source for driving these devices, they have become small-sized, lightweight, high energy density, long-life secondary batteries with excellent charge / discharge cycle characteristics. Is highly demanded. Therefore, recently, a material capable of doping / dedoping lithium ions such as lithium, a lithium alloy, or a carbon material is used as a negative electrode active material,
Research on non-aqueous electrolyte secondary batteries using lithium composite oxides such as lithium cobalt composite oxides as positive electrode active materials
Some are under development and some are already in practical use.
【０００３】従来、このような非水電解質二次電池の形
状としては、円筒形、角形（四角柱状）及び偏平角形等
がある。Conventionally, as the shape of such a non-aqueous electrolyte secondary battery, there are a cylindrical shape, a prismatic shape (square columnar shape), a flat rectangular shape and the like.
【０００４】円筒形非水電解質二次電池は、形状に無理
がなく、充放電サイクル特性に優れている。ところで、
単電池当たりの容量が大きくなることによる安全性の低
下を防止する場合や、単電池では出せない高い電圧を必
要とする場合には、例えば図４に示すように単電池２０
を複数個集合して組電池２１にする必要があるが、組電
池化した場合、隙間部分２２が多く、体積エネルギー密
度が低くなるという問題がある。The cylindrical non-aqueous electrolyte secondary battery has a reasonable shape and is excellent in charge / discharge cycle characteristics. by the way,
When it is necessary to prevent a decrease in safety due to an increase in the capacity per unit cell or when a high voltage that cannot be output by a unit cell is required, for example, as shown in FIG.
It is necessary to assemble a plurality of batteries to form the assembled battery 21, but when the assembled battery is formed, there is a problem that the gap portion 22 is large and the volume energy density is low.
【０００５】四角柱状の角形非水電解質二次電池は、組
電池化した場合、隙間部分を少なくできるため体積エネ
ルギー密度を高くすることができるが、渦巻き状に巻き
取った電極を四角柱状にプレス成形し使用するため、角
部で電極が直角に折り曲げられる。このため、角部と平
面部とで電極反応の反応性が異なり、全体として電極反
応が不均一となり、十分な充放電サイクル特性が得られ
ないという問題がある。また、角形電池は、渦巻き状の
電極を四角柱状にプレス成形する必要があるが、その場
合、電極の径が大きくなるほど大きな加圧力を要するた
め、大型化にも限界がある。When a prismatic non-aqueous electrolyte secondary battery having a quadrangular prism shape is assembled into a battery pack, the volume of the energy density can be increased because the gap can be reduced. However, the spirally wound electrode is pressed into a quadrangular prism shape. Since it is molded and used, the electrodes are bent at right angles at the corners. Therefore, there is a problem that the reactivity of the electrode reaction is different between the corner portion and the flat portion, the electrode reaction becomes non-uniform as a whole, and sufficient charge / discharge cycle characteristics cannot be obtained. Further, in the prismatic battery, it is necessary to press-form a spiral electrode into a quadrangular prism shape, but in that case, the larger the diameter of the electrode, the larger the pressing force required, and therefore there is a limit to the increase in size.
【０００６】[0006]
【発明が解決しようとする課題】そこで、本発明の目的
は、組電池化した場合の体積エネルギー密度が高く、か
つ全体として電極反応を均一に維持することにより充放
電サイクル特性に優れる非水電解質二次電池及び該二次
電池を複数個集合した組電池を提供することにある。Therefore, an object of the present invention is to provide a non-aqueous electrolyte which has a high volume energy density when assembled into a battery, and which is excellent in charge / discharge cycle characteristics by maintaining the electrode reaction uniformly as a whole. An object of the present invention is to provide a secondary battery and an assembled battery in which a plurality of the secondary batteries are assembled.
【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、本発明者は鋭意研究の結果、渦巻き状に巻付けてな
る渦巻き状電極の断面形状を六角形に形成し、六角筒形
の電池缶に収容するようにすれば、極めて有効であるこ
とを見出し、本発明を完成した。すなわち、本発明の非
水電解質二次電池は、帯状の正極と帯状の負極とをセパ
レーターを介して積層した帯状電極を設け、この帯状電
極を渦巻き状に巻付けてなる渦巻き状電極を備えた非水
電解質二次電池において、前記渦巻き状電極は円筒状に
形成したものをプレス成形して断面形状を六角形に形成
し、該六角形に形成した渦巻き状電極を六角筒形電池缶
に収容してなること、を特徴としている。また、本発明
の組電池は、かかる非水電解質二次電池を複数個各辺を
密接させて並列に集合するとともに、各非水電解質二次
電池を並列又は直列に接続してなること、を特徴として
いる。In order to solve the above problems, as a result of earnest research, the present inventor has formed a spirally wound electrode having a hexagonal cross-section into a hexagonal tubular shape. The present invention has been completed by finding that it is extremely effective if it is housed in a battery can. That is, the non-aqueous electrolyte secondary battery of the present invention is provided with a band-shaped electrode in which a band-shaped positive electrode and a band-shaped negative electrode are laminated with a separator interposed therebetween, and the spiral electrode is formed by spirally winding the band-shaped electrode. In the non-aqueous electrolyte secondary battery, the spiral electrode has a cylindrical shape.
The formed product is press-molded to form a hexagonal cross-sectional shape, and the hexagonal spiral electrode is housed in a hexagonal tubular battery can. Further, the assembled battery of the present invention, a plurality of such non-aqueous electrolyte secondary batteries are assembled in parallel by closely contacting each side, and each non-aqueous electrolyte secondary battery is connected in parallel or in series, It has a feature.
【０００８】[0008]
【発明の実施の形態】以下本発明の非水電解質二次電池
及び該二次電池を集合した組電池の実施の形態を説明す
る。図１は六角形に形成した渦巻き状電極を六角筒形電
池缶に収容した状態を示す説明図、図２は本発明の非水
電解質二次電池の断面図、図３は組電池化した場合の説
明図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the non-aqueous electrolyte secondary battery of the present invention and the assembled battery in which the secondary batteries are assembled will be described below. FIG. 1 is an explanatory view showing a state in which a hexagonal spiral electrode is housed in a hexagonal tubular battery can, FIG. 2 is a cross-sectional view of a non-aqueous electrolyte secondary battery of the present invention, and FIG. FIG.
【０００９】本発明の非水電解質二次電池１は、帯状の
正極２と帯状の負極３とをセパレーター４を介して積層
した帯状電極を、渦巻き状に巻付けた渦巻き状電極５を
備えてなる。そして、該渦巻き状電極５の断面形状をプ
レス等により成形して六角形に形成し、該六角形に形成
した渦巻き状電極５を有底の六角筒形の電池缶６に収容
してなる。図２において、符号７は正極２と正極キャッ
プ８とを接続する正極リード、９は負極３と電池缶６と
を接続する負極リード、１０は電池缶６と正極キャップ
８とを絶縁するとともに、気密性を保持するためのパッ
キンである。なお、電池缶６内には非水電解液が注入さ
れている。The non-aqueous electrolyte secondary battery 1 of the present invention comprises a spirally wound electrode 5 in which a spirally wound band-shaped electrode in which a band-shaped positive electrode 2 and a band-shaped negative electrode 3 are laminated via a separator 4 is provided. Become. Then, the cross-sectional shape of the spiral electrode 5 is formed by pressing or the like to form a hexagon, and the spiral electrode 5 formed in the hexagon is housed in a bottomed hexagonal tubular battery can 6. In FIG. 2, reference numeral 7 is a positive electrode lead connecting the positive electrode 2 and the positive electrode cap 8, 9 is a negative electrode lead connecting the negative electrode 3 and the battery can 6, 10 is insulating the battery can 6 and the positive electrode cap 8, and Packing for maintaining airtightness. A non-aqueous electrolytic solution is injected into the battery can 6.
【００１０】このように渦巻き状電極５の断面形状を六
角形に形成したので、六角筒形の電池缶６に容積効率よ
く電極５を収容できる。また、屈曲角度がそれほど大き
くないので、四角柱状の角形二次電池に比べて角部での
電極反応の集中が起こり難く、全体として電極反応を均
一に維持できる。このため、円筒形の非水電解質二次電
池と同様、充放電サイクル特性に優れている。また、円
筒状の渦巻き状電極を断面六角形に成形する際、屈曲角
度がそれほど大きくないので、プレス成形も容易で、大
型化も可能である。また、電極５を六角筒形電池缶６に
収容した六角柱状電池１としたので、次に述べるよう
に、組電池化した場合、隙間少なく集合でき、高体積エ
ネルギー密度化が可能となる。Since the spiral electrode 5 is formed in a hexagonal cross-section in this manner, the electrode 5 can be housed in the hexagonal tubular battery can 6 with high volume efficiency. Further, since the bending angle is not so large, the electrode reaction is less likely to be concentrated at the corners as compared with the prismatic prismatic secondary battery, and the electrode reaction can be uniformly maintained as a whole. Therefore, as with the cylindrical non-aqueous electrolyte secondary battery, it has excellent charge / discharge cycle characteristics. Further, when the cylindrical spiral electrode is formed into a hexagonal cross section, since the bending angle is not so large, press forming is easy and the size can be increased. Moreover, since the electrode 5 is the hexagonal columnar battery 1 housed in the hexagonal tubular battery can 6, as described below, when assembled into a battery pack, the gaps can be assembled with a small gap, and high volumetric energy density can be achieved.
【００１１】本発明の組電池は、例えば図３に示すよう
に、上記六角柱状の非水電解質二次電池１を複数個各辺
を密接させて並列に集合するとともに、各非水電解質二
次電池１を使用目的に応じて並列又は直列に接続（図示
せず）してなる。このように、六角柱状の二次電池１を
複数個隙間１２少なく配列することができるので、組電
池（１１）化した場合に、高い体積エネルギー密度が得
られる。In the assembled battery of the present invention, for example, as shown in FIG. 3, a plurality of hexagonal column-shaped non-aqueous electrolyte secondary batteries 1 are assembled in parallel with each side in close contact with each other, and each non-aqueous electrolyte secondary battery is The batteries 1 are connected in parallel or in series (not shown) depending on the purpose of use. In this way, since a plurality of hexagonal column-shaped secondary batteries 1 can be arranged with a small gap 12, a high volume energy density can be obtained when the assembled battery (11) is formed.
【００１２】本発明における非水電解質二次電池は、有
機溶媒にリチウム塩等の電解質を溶解させた非水電解液
を用いた二次電池であれば、特に制限はないが、負極活
物質、正極活物質、有機溶媒及び電解質を具体的に述べ
れば、以下のようなものが挙げられる。The non-aqueous electrolyte secondary battery in the present invention is not particularly limited as long as it is a secondary battery using a non-aqueous electrolytic solution in which an electrolyte such as a lithium salt is dissolved in an organic solvent, but the negative electrode active material, Specific examples of the positive electrode active material, the organic solvent and the electrolyte include the following.
【００１３】負極活物質としてはリチウムイオンのドー
プ・脱ドープが可能な炭素材料が好ましく、かかる炭素
材料としては、熱分解炭素類、コークス類、有機高分子
化合物焼成体、黒鉛、ガラス状炭素類等が挙げられる。
正極活物質としては、リチウムをドープ・脱ドープ可能
な物質であれば特に制限はないが、リチウム遷移金属複
合酸化物が好適で、具体的には、ＬｉＣｏＯ2 、ＬｉＭ
ｎＯ2 、ＬｉＮｉＯ2、ＬｉＣｒＯ2 、ＬｉＭｎ2 Ｏ4
等が挙げられる。The negative electrode active material is preferably a carbon material capable of being doped or dedoped with lithium ions. Examples of the carbon material include pyrolytic carbons, cokes, organic polymer compound fired bodies, graphite and glassy carbons. Etc.
The positive electrode active material is not particularly limited as long as it is a material that can be doped with lithium and dedoped, but a lithium transition metal composite oxide is preferable, and specifically, LiCoO 2 , LiM
nO 2 , LiNiO 2 , LiCrO 2 , LiMn 2 O 4
Etc.
【００１４】有機溶媒としては、特に限定されるもので
はないが、たとえば、エチレンカーボネイト、プロピレ
ンカーボネイト、ジエチルカーボネイト、ジメチルカー
ボネイト、エチルメチルカーボネイト、ジプロピルカー
ボネイト、γ−ブチロラクトン等が挙げられ、これらの
１種又は２種以上の混合溶媒を用いることができる。ま
た、電解質としては、ＬｉＰＦ6 、ＬｉＢＦ4 、ＬｉＣ
ｌＯ4 、ＬｉＡｓＦ6、ＬｉＳｂＦ6 、ＬｉＣＦ3 ＳＯ
3 、ＬｉＣ（ＣＦ3 ＳＯ2 ）3 等が挙げられ、これらの
１種又は２種以上を併用することもできる。The organic solvent is not particularly limited, and examples thereof include ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate, ethylmethyl carbonate, dipropyl carbonate, γ-butyrolactone, and the like. One kind or a mixed solvent of two or more kinds can be used. Further, as the electrolyte, LiPF 6 , LiBF 4 , LiC
lO 4 , LiAsF 6 , LiSbF 6 , LiCF 3 SO
3 , LiC (CF 3 SO 2 ) 3, and the like, and one or more of these may be used in combination.
【００１５】[0015]
【実施例】以下に本発明を実施例においてより具体的に
説明する。実施例は本発明を例示的に示したものであっ
て本発明を制限するものではない。実施例１
図１及び図２中の断面六角形に形成した渦巻き状電極５
は、帯状の正極２と帯状の負極３の間にポリプロピレン
製セパレータ４を配し、渦巻き状に巻付けた円柱形の渦
巻き状電極を、プレスにより六角柱状に成形したもので
ある。ここで、正極２は厚さ２０μｍのアルミニウム箔
の両面に、リチウムコバルト複合酸化物９０重量部、黒
鉛粉末５重量部、ポリフッ化ビニリデン樹脂５重量部、
及びＮ−メチルピロリドン５０重量部の混合物を、塗
布、乾燥、圧延したものである。また、負極３は厚さ１
５μｍの銅箔の両面に、黒鉛粉末９０重量部、ポリフッ
化ビニリデン樹脂１０重量部及びＮ−メチルピロリドン
１００重量部の混合物を、塗布、乾燥、圧延したもので
ある。また、正極２には正極リード７を、負極３には負
極リード９を溶接してある。この渦巻き状電極５を電池
缶６に装填後、正極リード７と正極キャップ８間、及び
負極リード９と電池缶６間を溶接した。次に、エチレン
カーボネイト５０ｖｏｌ％とジエチルカーボネイト５０
ｖｏｌ％からなる溶媒に、６フッ化リン酸リチウムを１
ｍｏｌ／Ｌの濃度で溶解させ、調整した非水電解液を電
池缶６内に注入し、パッキン１０を介して電池缶６の上
部をカシメることにより、正極キャップ８を固定して電
池缶６を密閉し、非水電解質二次電池１とした。こうし
て作製した非水電解質二次電池１の充放電試験結果を表
１に示す。なお、充放電試験は、電圧範囲２．５〜４．
１Ｖで行い、充放電電流は１０００ｍＡとした。EXAMPLES The present invention will be described more specifically below with reference to examples. The examples are illustrative of the invention and are not intended to limit the invention. Example 1 A spiral electrode 5 formed in a hexagonal cross section in FIGS. 1 and 2.
Is a columnar spirally wound electrode in which a polypropylene separator 4 is disposed between a strip-shaped positive electrode 2 and a strip-shaped negative electrode 3, and the spirally wound cylindrical electrode is formed into a hexagonal column shape by pressing. Here, the positive electrode 2 has 90 parts by weight of lithium cobalt composite oxide, 5 parts by weight of graphite powder, 5 parts by weight of polyvinylidene fluoride resin, on both sides of an aluminum foil having a thickness of 20 μm.
And a mixture of 50 parts by weight of N-methylpyrrolidone and applied, dried and rolled. The negative electrode 3 has a thickness of 1
A mixture of 90 parts by weight of graphite powder, 10 parts by weight of polyvinylidene fluoride resin and 100 parts by weight of N-methylpyrrolidone was applied, dried and rolled on both surfaces of a 5 μm copper foil. A positive electrode lead 7 is welded to the positive electrode 2 and a negative electrode lead 9 is welded to the negative electrode 3. After the spiral electrode 5 was loaded into the battery can 6, the positive electrode lead 7 and the positive electrode cap 8 and the negative electrode lead 9 and the battery can 6 were welded. Next, 50% by volume of ethylene carbonate and 50% of diethyl carbonate
1% lithium hexafluorophosphate in a solvent consisting of vol%
The prepared non-aqueous electrolyte solution is dissolved at a concentration of mol / L and injected into the battery can 6, and the upper part of the battery can 6 is caulked via the packing 10 to fix the positive electrode cap 8 and fix the battery can 6. Was sealed to obtain a non-aqueous electrolyte secondary battery 1. Table 1 shows the charge / discharge test results of the non-aqueous electrolyte secondary battery 1 thus produced. The charge / discharge test was conducted in the voltage range of 2.5 to 4.
It was performed at 1 V and the charge / discharge current was 1000 mA.
【００１６】比較例１
実施例１における円柱形の渦巻き状電極を、プレス成形
せず円柱状のまま使用し、電池缶として円筒形容器を使
用した以外は、実施例１と同様の方法を用いて非水電解
質二次電池を作製した。こうして作製した電池の充放電
試験結果を表１に示す。 Comparative Example 1 The same method as in Example 1 was used, except that the cylindrical spirally wound electrode in Example 1 was used as it was without being press-molded, and a cylindrical container was used as a battery can. A non-aqueous electrolyte secondary battery was produced. Table 1 shows the charge / discharge test results of the battery thus manufactured.
【００１７】比較例２
実施例１における円柱形の渦巻き状電極を、四角柱状に
プレス成形し、電池缶として角形容器を使用した以外
は、実施例１と同様の方法を用いて非水電解質二次電池
を作製した。こうして作製した電池の充放電試験結果を
表１に示す。 Comparative Example 2 A non-aqueous electrolyte electrolyte was prepared in the same manner as in Example 1 except that the cylindrical spirally wound electrode in Example 1 was press-molded into a square column shape and a rectangular container was used as a battery can. A secondary battery was produced. Table 1 shows the charge / discharge test results of the battery thus manufactured.
【００１８】[0018]
【表１】 表 １ 放電容量 体積エネルギー 100 サイクル後 （ｍＡｈ） 密度（Ｗｈ／Ｌ） 容量維持率（％） 実施例１の電池 １６８０ ２１９ ９１．１ 比較例１の電池 １６９０ ２２１ ９１．３ 比較例２の電池 １６６０ ２１６ ８２．６ [Table 1] Table 1 Discharge capacity Volume energy after 100 cycles (MAh) Density (Wh / L) Capacity retention rate (%) Battery of Example 1 1680 219 91.1 Battery of Comparative Example 1 1690 221 91.3 Battery of Comparative Example 2 1660 216 82.6
【００１９】表１から分かるように、実施例１の電池
は、比較例１と同様な高い容量維持率を示したが、比較
例２の電池は容量維持率が低いものとなった。As can be seen from Table 1, the battery of Example 1 showed a high capacity retention rate similar to that of Comparative Example 1, but the battery of Comparative Example 2 had a low capacity retention rate.
【００２０】実施例２
実施例１において作製した単電池（１）８１個を図３に
示すように各辺を密接させて並列（最密状態）に配置す
るとともに、各単電池を並列に接続して組電池１１とし
た。この組電池１１の充放電試験結果を表２に示す。な
お、充放電試験は、電圧範囲２．５〜４．１Ｖで行い、
充放電電流は２０Ａとした。 Example 2 Eighty-one unit cells (1) produced in Example 1 were arranged in parallel (closest packed state) with their sides in close contact with each other as shown in FIG. 3, and each unit cell was connected in parallel. The assembled battery 11 was obtained. Table 2 shows the charging / discharging test result of the assembled battery 11. The charge / discharge test is performed in the voltage range of 2.5 to 4.1V,
The charge / discharge current was 20A.
【００２１】比較例３
比較例１において作製した単電池（２０）８１個を図４
に示すように最密状態に配置するとともに、各単電池２
０を並列に接続して組電池２１とした。この組電池２１
の充放電試験結果を表２に示す。 Comparative Example 3 81 unit cells (20) produced in Comparative Example 1 are shown in FIG.
The cells are arranged in a close-packed state as shown in Fig.
0 was connected in parallel to form an assembled battery 21. This battery pack 21
Table 2 shows the results of the charge and discharge test.
【００２２】[0022]
【表２】 [Table 2]
【００２３】表２から分かるように、実施例２の組電池
１１は、比較例３の組電池２１に比べて高い体積エネル
ギー密度を示した。As can be seen from Table 2, the assembled battery 11 of Example 2 exhibited a higher volume energy density than the assembled battery 21 of Comparative Example 3.
【００２４】[0024]
【発明の効果】以上、説明したように、本発明の非水電
解質二次電池によれば、円筒状の渦巻き状電極をプレス
成形して、その断面形状を六角形に形成し、六角筒形電
池缶に収容するようにしたので、組電池化した場合の体
積エネルギー密度が高く、かつ全体として電極反応を均
一に維持することにより充放電サイクル特性に優れる。
また、本発明の組電池によれば、体積エネルギー密度が
高く、かつ充放電サイクル特性に優れる等の効果を奏す
る。As described above, according to the non-aqueous electrolyte secondary battery of the present invention, the cylindrical spiral electrode is pressed.
Molded to form a sectional shape in a hexagonal, since so as to accommodate the hexagonal cylindrical battery can, the body of the case where the assembled battery of
The product energy density is high and the electrode reaction is uniform as a whole.
By maintaining the same value, the charge / discharge cycle characteristics are excellent.
Further, according to the assembled battery of the present invention, there are effects such as high volume energy density and excellent charge / discharge cycle characteristics.
【図１】六角形に形成した渦巻き状電極を六角筒形電池
缶に収容した状態を示す説明図。FIG. 1 is an explanatory view showing a state in which a hexagonal spiral electrode is housed in a hexagonal tubular battery can.
【図２】本発明の非水電解質二次電池の断面図。FIG. 2 is a cross-sectional view of a non-aqueous electrolyte secondary battery of the present invention.
【図３】組電池化した場合の説明図。FIG. 3 is an explanatory diagram of a case where an assembled battery is used.
【図４】比較例３における組電池の説明図。FIG. 4 is an explanatory diagram of an assembled battery in Comparative Example 3.
【符号の説明】 １ 非水電解質二次電池 ２ 正極 ３ 負極 ４ セパレータ ５ 渦巻き状電極 ６ 六角筒形電池缶 １１ 組電池[Explanation of symbols] 1 Non-aqueous electrolyte secondary battery 2 positive electrode 3 Negative electrode 4 separator 5 spiral electrode 6 Hexagonal tubular battery can 11 batteries
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 10/40 H01M 10/04 - 10/28 H01M 6/02 - 6/18 H01M 2/02 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) H01M 10/40 H01M 10/04-10/28 H01M 6/02-6/18 H01M 2/02
Claims (2)
を介して積層した帯状電極を設け、この帯状電極を渦巻
き状に巻付けてなる渦巻き状電極を備えた非水電解質二
次電池において、前記渦巻き状電極は円筒状に形成した
ものをプレス成形して断面形状を六角形に形成し、該六
角形に形成した渦巻き状電極を六角筒形電池缶に収容し
てなることを特徴とする非水電解質二次電池。1. A non-aqueous electrolyte secondary battery comprising a spirally wound electrode formed by stacking a spirally wound positive electrode and a negative belt negative electrode via a separator, and spirally winding the spirally wound electrode. The spiral electrode was formed in a cylindrical shape
What is claimed is: 1. A non-aqueous electrolyte secondary battery, which is obtained by press-molding a product to form a hexagonal cross-sectional shape, and storing the hexagonal spiral electrode in a hexagonal tubular battery can.
数個各辺を密接させて並列に集合するとともに、各非水
電解質二次電池を並列又は直列に接続してなる組電池。2. An assembled battery in which a plurality of the non-aqueous electrolyte secondary batteries according to claim 1 are assembled in parallel with their respective sides in close contact with each other, and the non-aqueous electrolyte secondary batteries are connected in parallel or in series. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10354596A JP3457461B2 (en) | 1996-03-29 | 1996-03-29 | Non-aqueous electrolyte secondary battery and assembled battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10354596A JP3457461B2 (en) | 1996-03-29 | 1996-03-29 | Non-aqueous electrolyte secondary battery and assembled battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09266012A JPH09266012A (en) | 1997-10-07 |
| JP3457461B2 true JP3457461B2 (en) | 2003-10-20 |
Family
ID=14356815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10354596A Expired - Fee Related JP3457461B2 (en) | 1996-03-29 | 1996-03-29 | Non-aqueous electrolyte secondary battery and assembled battery |
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| Country | Link |
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| JP (1) | JP3457461B2 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW521449B (en) | 2000-07-04 | 2003-02-21 | Matsushita Electric Ind Co Ltd | A battery, a process for producing the battery, a process for producing a battery case, and a battery pack |
| DE102007010744B4 (en) * | 2007-02-27 | 2009-01-22 | Daimler Ag | Battery cell of a battery, cell combination of battery cells and use of multiple cells |
| JP2012064353A (en) * | 2010-09-14 | 2012-03-29 | Sony Corp | Power supply unit |
| JP2014170613A (en) * | 2011-06-28 | 2014-09-18 | Panasonic Corp | Battery module |
| JP2014197452A (en) * | 2011-08-03 | 2014-10-16 | パナソニック株式会社 | Battery module |
| CN102593524A (en) * | 2012-03-01 | 2012-07-18 | 广州市云通磁电有限公司 | Manufacturing method of orthohexagonal lithium ion battery cell |
| US20170210587A1 (en) * | 2014-07-23 | 2017-07-27 | Bosch Corporation | Roll and method for manufacturing roll |
| US10224573B2 (en) * | 2016-03-28 | 2019-03-05 | Bosch Battery Systems, Llc | Wound electrode assembly for an electrochemical cell, and methods and devices for manufacture of same |
| US20210175566A1 (en) * | 2018-04-06 | 2021-06-10 | Sanyo Electric Co., Ltd. | Battery |
| KR102503269B1 (en) * | 2018-09-05 | 2023-02-22 | 주식회사 엘지에너지솔루션 | Hexagonal prism-shaped battery cell and Method for manufacturing the same, and Battery module comprising the same |
| CN110931879A (en) * | 2019-11-18 | 2020-03-27 | 合肥国轩高科动力能源有限公司 | Novel columnar lithium ion battery |
| CN112768748B (en) * | 2021-04-07 | 2021-08-03 | 江苏时代新能源科技有限公司 | Battery monomer, battery, electric equipment and method and device for preparing battery monomer |
| EP4099461A4 (en) * | 2021-04-07 | 2022-12-07 | Jiangsu Contemporary Amperex Technology Limited | Battery cell, battery, electric device, and method and apparatus for manufacturing battery cell |
| US11817260B2 (en) * | 2021-11-30 | 2023-11-14 | Nissan North America, Inc. | Integrated supercapacitor-battery structure |
| US11862395B2 (en) * | 2021-11-30 | 2024-01-02 | Nissan North America, Inc. | Energy bank including integrated supercapacitor-battery structures |
-
1996
- 1996-03-29 JP JP10354596A patent/JP3457461B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09266012A (en) | 1997-10-07 |
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