JP2002042741A - Sealed angular flat battery - Google Patents
Sealed angular flat batteryInfo
- Publication number
- JP2002042741A JP2002042741A JP2000228607A JP2000228607A JP2002042741A JP 2002042741 A JP2002042741 A JP 2002042741A JP 2000228607 A JP2000228607 A JP 2000228607A JP 2000228607 A JP2000228607 A JP 2000228607A JP 2002042741 A JP2002042741 A JP 2002042741A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- rectangular flat
- long side
- sealed
- internal pressure
- 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
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000007600 charging Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000003405 preventing effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 9
- 230000008961 swelling Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011255 nonaqueous electrolyte Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- -1 for example Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229920013716 polyethylene resin Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910013733 LiCo Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、密閉角形扁平電
池、特にリチウムイオン二次電池に適用される外装缶の
形状に関するもので、さらに詳しくは、電池内圧に対す
る耐圧強度が高く、変形防止性に優れた外装缶の形状に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shape of an outer can applied to a sealed rectangular flat battery, particularly to a lithium ion secondary battery, and more particularly, to a high pressure resistance against an internal pressure of the battery and a high degree of deformation prevention. It relates to the shape of an excellent outer can.
【０００２】[0002]
【従来の技術】近年、通信機、ＡＶ機器、パソコンのコ
ードレス化・ポータブル化に伴いその駆動用電源である
電池に対して小型・軽量・高エネルギー密度化の要望が
強まっている。特にリチウム二次電池は高エネルギー密
度を有する電池であり、その潜在的市場規模も大きい。
また形状としては機器の薄型化あるいは機器のスペース
の有効利用の観点からも角形電池の要望が高まってい
る。2. Description of the Related Art In recent years, as cordless and portable communication devices, AV devices, and personal computers have become more portable, there has been an increasing demand for smaller, lighter, and higher energy densities of batteries as power sources for driving them. In particular, a lithium secondary battery is a battery having a high energy density, and its potential market size is large.
Also, as for the shape, there is an increasing demand for a prismatic battery from the viewpoint of making the device thinner or effectively utilizing the space of the device.
【０００３】特に通信機においては、本体の軽量化に伴
い電池に対しても小型、軽量が強く要望されている。そ
の軽量化を達成するための方法として外装缶および封口
板の材質にアルミニウムまたはアルミニウムを主成分と
する合金材料が用いられている。[0003] In particular, in a communication device, as the weight of the main body is reduced, there is a strong demand for a smaller and lighter battery. As a method for achieving the weight reduction, aluminum or an alloy material containing aluminum as a main component is used for the material of the outer can and the sealing plate.
【０００４】その外装缶は、角形の扁平状に成形された
形状をしており、また電極群は、正極板及び負極板をセ
パレータを介して非真円形の渦巻形状に巻回されてい
る。その電極群を前記外装缶に収納し、電解液を注液し
て封口板により外装缶を密閉して電池としている。[0004] The outer can has a rectangular flat shape, and the electrode group is formed by winding a positive electrode plate and a negative electrode plate into a non-circular spiral shape via a separator. The electrode group is housed in the outer can, an electrolyte is injected, and the outer can is sealed with a sealing plate to form a battery.
【０００５】保存や充放電サイクルを繰返すと、電気化
学反応によるガス発生に伴う内圧上昇や電極群の膨潤な
どによって、外装缶の側面、底面、封口部に内部圧力が
かかる。この内部圧力に対して、安全弁の作動圧と、外
装缶の材質や構造設計による耐圧の最適化によって対処
しており、円筒形電池の場合には、その側面全体に対し
て均等な圧力がかかる為、角形電池と比較して耐圧強度
が高い。また、角形電池の形状によっても耐圧強度が異
なり、断面が長方形のものほど耐圧強度が低く、外装缶
の長辺面が膨れるなどの変形を生じやすい。[0005] When storage and charge / discharge cycles are repeated, internal pressure is applied to the side surface, bottom surface, and sealing portion of the outer can due to an increase in internal pressure due to gas generation due to the electrochemical reaction and swelling of the electrode group. This internal pressure is handled by optimizing the operating pressure of the safety valve and the pressure resistance by the material and structure design of the outer can. In the case of a cylindrical battery, an even pressure is applied to the entire side surface Therefore, the pressure resistance is higher than that of a prismatic battery. Further, the pressure resistance varies depending on the shape of the prismatic battery. A rectangular cross section has a lower pressure resistance, and is likely to be deformed such as a bulging of the long side surface of the outer can.
【０００６】そこで、角形扁平状外装缶の長辺面に長方
形の凹部を設ける方法が特開平７−１８３０１０号公報
に、また、角形扁平状外装缶の長辺面に一つ以上のＸ字
状の凹部を設ける方法が特開平１１−６７２７６号公報
に開示されている。Therefore, a method of providing a rectangular concave portion on the long side surface of the rectangular flat outer can is disclosed in JP-A-7-183010, and one or more X-shaped portions are provided on the long side surface of the rectangular flat outer can. The method of providing the concave portion is disclosed in JP-A-11-67276.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、これら
の方法は、電池内圧が長辺面全体に均一にかからない為
に、耐圧強度不足により外装缶が膨れ変形してしまう。However, in these methods, since the internal pressure of the battery is not uniformly applied to the entire long side surface, the outer can swells and deforms due to insufficient pressure resistance.
【０００８】本発明は、保存や充放電サイクルを繰返し
ても、電池内圧が外装缶の長辺面全体に均一にかかり、
耐圧強度に優れ信頼性の高い密閉角形扁平電池を提供す
ることを主たる目的とする。According to the present invention, even when storage and charge / discharge cycles are repeated, the internal pressure of the battery is uniformly applied to the entire long side surface of the outer can,
A main object of the present invention is to provide a sealed rectangular flat battery having excellent pressure resistance and high reliability.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
めの本発明は、正極板と負極板とをセパレータを介して
非真円形の渦巻形状に巻回した電極群を上端が開口する
有底の角形扁平状外装缶に収納してなる密閉角形電池に
おいて、前記外装缶の材質がアルミニウムまたはアルミ
ニウム合金からなり、その長辺面に幅方向及び高さ方向
の稜線に対して平行でない直線部を有する凹部が形成さ
れていることを特徴とし、この凹部が略菱形形状である
ことが好ましい。In order to achieve the above object, the present invention provides an electrode assembly in which a positive electrode plate and a negative electrode plate are wound in a non-circular spiral shape with a separator interposed therebetween. In a sealed prismatic battery which is housed in a rectangular flat outer bottom can, the outer can is made of aluminum or an aluminum alloy, and a long side surface of the straight portion which is not parallel to the ridge line in the width direction and the height direction. Is formed, and it is preferable that the recess has a substantially rhombic shape.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施形態につい
て、図面を参照しながら説明する。図１は本発明による
外装缶の斜視図、図２は電池内圧と外装缶の膨れ量の関
係を示す特性図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an outer can according to the present invention, and FIG. 2 is a characteristic diagram showing the relationship between the internal pressure of the battery and the amount of swelling of the outer can.
【００１１】外装缶１は上端が開口する有底の角形扁平
状外装缶であり、その材質はアルミニウムまたはアルミ
ニウム合金からなり、耐圧強度の観点からマンガン、銅
等の金属を微量含有するアルミニウムが好ましく、合金
Ｎｏ．３０００系のアルミニウム合金が最適である。The outer can 1 is a rectangular flat outer can having a bottom and an open upper end. The outer can is made of aluminum or an aluminum alloy. From the viewpoint of pressure resistance, aluminum containing a small amount of a metal such as manganese or copper is preferable. , Alloy No. A 3000 series aluminum alloy is optimal.
【００１２】また、外装缶１の長辺面には幅方向及び高
さ方向の稜線に対して平行でない直線部を有する凹部２
が形成されており、この凹部は略菱形形状であることが
好ましい。A concave portion 2 having a straight portion that is not parallel to the ridge line in the width direction and the height direction on the long side surface of the outer can 1.
It is preferable that the concave portion has a substantially rhombic shape.
【００１３】この稜線に対して平行ではないが曲線から
なる楕円形状の凹部の場合は、内部圧力を受け止める直
線部分がないので膨れ、平行な直線部からなる凹部の場
合には、平行な直線部分に内部圧力がかかり膨れると推
測される。In the case of an elliptical concave portion which is not parallel to the ridge line but is formed of a curved line, there is no linear portion for receiving internal pressure, so that the concave portion swells. It is presumed that the swelling is caused by internal pressure.
【００１４】略菱形形状の縦寸法ａは、長辺面の高さ方
向寸法Ａを１とした場合、０．５〜０．９５の範囲で、
かつ、横寸法ｂが長辺面の幅方向の寸法Ｂを１とした場
合、０．５〜０．９５の範囲であることが、外装缶の変
形防止性と加工性の観点から好ましい。The longitudinal dimension a of the substantially rhombic shape is in the range of 0.5 to 0.95 when the dimension A in the height direction of the long side surface is 1.
Further, when the lateral dimension b is 1 in the width direction dimension B of the long side surface, it is preferable that the lateral dimension b is in the range of 0.5 to 0.95 from the viewpoint of prevention of deformation of the outer can and workability.
【００１５】また、凹部２の深さは０．１０ｍｍ〜０．
５０ｍｍであることが好ましく、プレス成型による略菱
形形状の形成の観点から傾斜角度を持たせることが好ま
しい。The depth of the recess 2 is 0.10 mm to 0.1 mm.
It is preferably 50 mm, and it is preferable to have an inclination angle from the viewpoint of forming a substantially rhombic shape by press molding.
【００１６】ところで、本発明の正極板の正極活物質と
しては、例えば、リチウムイオンをゲストとして受け入
れ得るリチウム含有遷移金属化合物が使用される。例え
ば、コバルト、マンガン、ニッケル、クロム、鉄および
バナジウムから選ばれる少なくとも一種類の金属とリチ
ウムとの複合金属酸化物、ＬｉＣｏＯ2、ＬｉＭｎＯ2、
ＬｉＮｉＯ2、ＬｉＣｏxＮｉ(1-x)Ｏ2（０＜ｘ＜１）、
ＬｉＣｒＯ2、αＬｉＦｅＯ2、ＬｉＶＯ2等が好まし
い。By the way, as the positive electrode active material of the positive electrode plate of the present invention, for example, a lithium-containing transition metal compound capable of accepting lithium ions as a guest is used. For example, a composite metal oxide of lithium and at least one metal selected from cobalt, manganese, nickel, chromium, iron and vanadium, LiCoO 2 , LiMnO 2 ,
LiNiO 2 , LiCo x Ni (1-x) O 2 (0 <x <1),
LiCrO 2 , αLiFeO 2 , LiVO 2 and the like are preferable.
【００１７】負極板の負極活物質としては、例えば、リ
チウムイオンを吸蔵、脱離し得る黒鉛型結晶構造を有す
るグラファイトを含む材料、例えば天然黒鉛や人造黒鉛
が使用される。特に、格子面（００２）の面間隔（ｄ
002）が３．３５０〜３．４００Åである黒鉛型結晶構
造を有する炭素材料を使用することが好ましい。As the negative electrode active material of the negative electrode plate, for example, a material containing graphite having a graphite type crystal structure capable of inserting and extracting lithium ions, for example, natural graphite and artificial graphite is used. In particular, the spacing (d) of the lattice plane (002)
It is preferable to use a carbon material having a graphite type crystal structure in which ( 002 ) is 3.350 to 3.400 °.
【００１８】セパレータとしては、ポリエチレン樹脂、
ポリプロピレン樹脂などの微多孔性ポリオレフイン系樹
脂が好ましい。As the separator, polyethylene resin,
Microporous polyolefin-based resins such as polypropylene resins are preferred.
【００１９】[0019]
【実施例】以下、実施例と比較例を用いて更に詳しく説
明する。The present invention will be described in more detail with reference to examples and comparative examples.
【００２０】（実施例１）ＬｉＣｏＯ2を正極活物質と
する正極と炭素材料を負極活物質とする負極とを厚さ２
５μｍの微多孔性ポリエチレン樹脂からなるセパレータ
を介して扁平状に巻回した電極群を、長辺面からプレス
加工ごとにより長円状の電極群を得た。Example 1 A positive electrode using LiCoO 2 as a positive electrode active material and a negative electrode using a carbon material as a negative electrode active material have a thickness of 2
An electrode group wound in a flat shape via a separator made of a 5 μm microporous polyethylene resin was obtained from a long side surface by pressing each time to obtain an elliptical electrode group.
【００２１】外装缶１は３０００系のアルミニウム合金
を用いて、肉厚０．２０ｍｍで、幅寸法Ｂが３０．０ｍ
ｍ、高さ寸法Ａが４８．０ｍｍ、厚さ５．３ｍｍの形状
にプレス成型により作製した。The outer can 1 is made of a 3000 series aluminum alloy, has a thickness of 0.20 mm and a width B of 30.0 m.
m and a height dimension A of 48.0 mm and a thickness of 5.3 mm by press molding.
【００２２】この外装缶１の長辺面の両面に幅寸法ｂが
２７．０ｍｍ、高さ寸法ａが４３．２ｍｍで、傾斜角度
３０度で深さが０．１０ｍｍの図１に示すような略菱形
形状の凹部２を形成した。このようにして得られた外装
缶１に長円状の電極群を挿入し、外装缶１と封口板３と
をレーザー溶接した後、封口板３の注液孔から非水電解
液を注液することにより密閉角形扁平電池を得た。As shown in FIG. 1, a width b is 27.0 mm, a height a is 43.2 mm, an inclination angle is 30 degrees and a depth is 0.10 mm on both long sides of the outer can 1. A substantially rhombus-shaped concave portion 2 was formed. An elliptical electrode group is inserted into the outer can 1 thus obtained, and the outer can 1 and the sealing plate 3 are laser-welded, and then a non-aqueous electrolyte is injected from the injection hole of the sealing plate 3. Thus, a sealed rectangular flat battery was obtained.
【００２３】（実施例２）外装缶１１は３０００系のア
ルミニウム合金を用いて、肉厚０．２０ｍｍで、幅寸法
１Ｂが３４．０ｍｍ、高さ寸法１Ａが５０．０ｍｍ、厚
さ６．５ｍｍの形状にプレス成型により作製した。(Example 2) The outer can 11 is made of a 3000 series aluminum alloy, has a thickness of 0.20 mm, a width 1B of 34.0 mm, a height 1A of 50.0 mm, and a thickness of 6.5 mm. Was produced by press molding.
【００２４】この外装缶１１の長辺面の両面に幅寸法１
ｂが２３．８ｍｍ、高さ寸法１ａが３５．０ｍｍで、傾
斜角度４５度で深さが０．３０ｍｍの図３に示すような
略菱形形状の凹部１２を形成した。この略菱形形状はプ
レス位置を少しずらして２回プレス成型することにより
得られる。このようにして得られた外装缶１１に実施例
１と同様にして作製した長円状の電極群を挿入し、外装
缶１１と封口板１３とをレーザー溶接した後、封口板１
３の注液孔から非水電解液を注液することにより密閉角
形扁平電池を得た。The outer can 11 has a width dimension of 1 on both long sides.
As shown in FIG. 3, a substantially rhombus-shaped concave portion 12 having a length b of 23.8 mm, a height 1a of 35.0 mm, an inclination angle of 45 degrees and a depth of 0.30 mm was formed. This substantially rhombic shape can be obtained by performing press molding twice with the press position slightly shifted. The elliptical electrode group produced in the same manner as in Example 1 was inserted into the outer can 11 thus obtained, and the outer can 11 and the sealing plate 13 were laser-welded.
A sealed rectangular flat battery was obtained by injecting a non-aqueous electrolyte from the injection hole of No. 3.
【００２５】（比較例１）外装缶１に凹部を形成しなか
った以外は、実施例１と同様にして密閉角形扁平電池を
得た。Comparative Example 1 A sealed rectangular flat battery was obtained in the same manner as in Example 1 except that no recess was formed in the outer can 1.
【００２６】（比較例２）外装缶に幅方向及び高さ方向
の稜線に対して、平行ではないが曲線からなる楕円形状
の凹部が形成されている例を示す。外装缶２１は３００
０系のアルミニウム合金を用いて、肉厚０．２０ｍｍ
で、幅寸法２Ｂが３０．０ｍｍ、高さ寸法２Ａが４８．
０ｍｍ、厚さ５．３ｍｍの形状にプレス成型により作製
した。(Comparative Example 2) An example in which an elliptical concave portion which is not parallel to the ridge line in the width direction and the height direction but is formed of a curved line is formed in the outer can. The outer can 21 is 300
0.20mm thickness using a 0 series aluminum alloy
The width 2B is 30.0 mm and the height 2A is 48.
It was produced by press molding into a shape having a thickness of 0 mm and a thickness of 5.3 mm.
【００２７】この外装缶２１の長辺面の両面に短軸寸法
２ｂが２７．０ｍｍ、長軸寸法２ａが４３．２ｍｍで、
傾斜角度３０度で深さが０．１０ｍｍの図４に示すよう
な略菱形形状の凹部２２を形成した。このようにして得
られた外装缶２１に実施例１と同様にして作製した長円
状の電極群を挿入し、外装缶２１と封口板２３とをレー
ザー溶接した後、封口板２３の注液孔から非水電解液を
注液することにより密閉角形扁平電池を得た。On both long sides of the outer can 21, the short axis dimension 2b is 27.0 mm, the long axis dimension 2a is 43.2 mm,
A substantially rhombus-shaped recess 22 having an inclination angle of 30 degrees and a depth of 0.10 mm as shown in FIG. 4 was formed. The elliptical electrode group produced in the same manner as in Example 1 was inserted into the outer can 21 thus obtained, and the outer can 21 and the sealing plate 23 were laser-welded. A closed rectangular flat battery was obtained by injecting a non-aqueous electrolyte through the holes.
【００２８】（比較例３）外装缶に幅方向及び高さ方向
の稜線に対して、平行な直線からなる長方形の凹部が形
成されている例を示す。外装缶３１は３０００系のアル
ミニウム合金を用いて、肉厚０．２０ｍｍで、幅寸法３
Ｂが３０．０ｍｍ、高さ寸法３Ａが４８．０ｍｍ、厚さ
５．３ｍｍの形状にプレス成型により作製した。(Comparative Example 3) An example in which a rectangular concave portion formed of a straight line parallel to the ridge line in the width direction and the height direction is formed in the outer can is shown. The outer can 31 is made of a 3000 series aluminum alloy and has a thickness of 0.20 mm and a width of 3 mm.
B was 30.0 mm, height 3A was 48.0 mm, and the thickness 5.3 mm was produced by press molding.
【００２９】この外装缶３１の長辺面の両面に幅寸法３
ｂが２７．０ｍｍ、高さ寸法３ａが４３．２ｍｍで、傾
斜角度３０度で深さが０．１０ｍｍの図５に示すような
長方形の凹部３２を形成した。このようにして得られた
外装缶３１に実施例１と同様にして作製した長円状の電
極群を挿入し、外装缶３１と封口板３３とをレーザー溶
接した後、封口板３３の注液孔から非水電解液を注液す
ることにより密閉角形扁平電池を得た。The outer can 31 has a width dimension 3 on both long sides.
A rectangular recess 32 as shown in FIG. 5 having a length b of 27.0 mm, a height 3a of 43.2 mm, an inclination angle of 30 degrees and a depth of 0.10 mm was formed. The elliptical electrode group produced in the same manner as in Example 1 was inserted into the outer can 31 thus obtained, and the outer can 31 and the sealing plate 33 were laser-welded. A closed rectangular flat battery was obtained by injecting a non-aqueous electrolyte through the holes.
【００３０】（電池内圧と外装缶の膨れ量）実施例１〜
実施例２、比較例１〜比較例３で得られた密閉角形扁平
電池に孔をあけ、これに窒素ガスを用い電池内圧を可変
できる治具を取付け、電池内圧０ＭＰａにおける外装缶
の厚みをマイクロメータにて測定した厚みを基準とし
て、各電池内圧における外装缶の厚みを測定し、膨れ量
を求め、図２に示した。(Internal Pressure of Battery and Amount of Swelling of Outer Can)
A hole was made in the sealed rectangular flat batteries obtained in Example 2, Comparative Examples 1 to 3, and a jig capable of changing the internal pressure of the battery using nitrogen gas was attached thereto. Based on the thickness measured by the meter as a reference, the thickness of the outer can was measured at each internal pressure of the battery, and the amount of swelling was obtained. The results are shown in FIG.
【００３１】図２から明らかなように本発明による外装
缶は、電池内圧０．０８ＭＰａ以下の実使用領域におい
て、比較例に比べて約１／２の膨れ量しかなく、保存や
充放電サイクルを繰返しても、電池内圧が外装缶の長辺
面全体に均一にかかり、耐圧強度に優れているので、電
極群が膨潤したり、隙間を生じるのを抑制でき、信頼性
の高い密閉角形扁平電池である。As can be seen from FIG. 2, the outer can according to the present invention has a swollen amount of only about ２ as compared with the comparative example in the actual use region where the internal pressure of the battery is 0.08 MPa or less, and the storage and charge / discharge cycle can be reduced. Even when repeated, the internal pressure of the battery is uniformly applied to the entire long side surface of the outer can, and the pressure resistance is excellent, so that the electrodes can be prevented from swelling and gaps are formed, and a highly reliable sealed rectangular flat battery is provided. It is.
【００３２】[0032]
【発明の効果】以上説明の通り本発明の密閉角形扁平電
池によれば、外装缶の長辺面に幅方向及び高さ方向の稜
線に対して平行でない直線部を有する凹部を形成するこ
とにより、保存や充放電サイクルを繰返しても、電池内
圧が外装缶の長辺面全体に均一にかかり、耐圧強度に優
れ信頼性の高い密閉角形扁平電池を提供することができ
る。As described above, according to the sealed rectangular flat battery of the present invention, by forming a concave portion having a straight portion that is not parallel to the ridge line in the width direction and the height direction on the long side surface of the outer can. Even if storage and charge / discharge cycles are repeated, the internal pressure of the battery is uniformly applied to the entire long side surface of the outer can, and a highly reliable sealed rectangular flat battery having excellent pressure resistance and high reliability can be provided.
【図１】本発明による外装缶の斜視図FIG. 1 is a perspective view of an outer can according to the present invention.
【図２】電池内圧と外装缶の膨れ量の関係を示す特性図FIG. 2 is a characteristic diagram showing a relationship between a battery internal pressure and a swelling amount of an outer can.
【図３】本発明による別の外装缶の斜視図FIG. 3 is a perspective view of another outer can according to the present invention.
【図４】従来例による外装缶の斜視図FIG. 4 is a perspective view of an outer can according to a conventional example.
【図５】別の従来例による外装缶の斜視図FIG. 5 is a perspective view of another conventional outer can.
【符号の説明】 １，１１，２１，３１ 外装缶 Ａ，１Ａ，２Ａ，３Ａ 外装缶の高さ寸法 Ｂ，１Ｂ，２Ｂ，３Ｂ 外装缶の幅寸法 ａ，１ａ，３ａ 凹部の高さ寸法 ｂ，１ｂ，３ｂ 凹部の幅寸法 ２ａ 凹部の長軸寸法 ２ｂ 凹部の短軸寸法 ２，１２，２２，３２ 凹部 ３，１３，２３，３３ 封口板[Description of Signs] 1,11,21,31 Outer can A, 1A, 2A, 3A Height of outer can B, 1B, 2B, 3B Width of outer can a, 1a, 3a Height of recess b , 1b, 3b Width of recess 2a Long axis of recess 2b Short axis of recess 2,12,22,32 Recess 3,13,23,33 Sealing plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ▲今▼西 裕明 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 松政 義高 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5H011 AA01 CC06 DD01 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor ▲ Now ▼ Hiroaki Nishi 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Yoshitaka Matsumasa 1006 Odaka Kadoma Kadoma, Osaka Matsushita Electric Industrial F term (reference) in the company 5H011 AA01 CC06 DD01
Claims (2)
非真円形の渦巻形状に巻回した電極群を上端が開口する
有底の角形扁平状外装缶に収納してなる密閉角形電池に
おいて、前記外装缶の材質がアルミニウムまたはアルミ
ニウム合金からなり、その長辺面に幅方向及び高さ方向
の稜線に対して平行でない直線部を有する凹部が形成さ
れていることを特徴とする密閉角形扁平電池。1. A sealed prismatic battery in which a positive electrode plate and a negative electrode plate are wound in a non-circular spiral shape with a separator interposed therebetween in a bottomed rectangular flat outer can having an open upper end. Wherein the outer can is made of aluminum or an aluminum alloy, and a long side surface thereof is formed with a concave portion having a straight portion that is not parallel to a ridge line in a width direction and a height direction, and has a flat rectangular shape. battery.
とする請求項１に記載の密閉角形扁平電池。2. The sealed rectangular flat battery according to claim 1, wherein the recess has a substantially rhombic shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000228607A JP2002042741A (en) | 2000-07-28 | 2000-07-28 | Sealed angular flat battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000228607A JP2002042741A (en) | 2000-07-28 | 2000-07-28 | Sealed angular flat battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002042741A true JP2002042741A (en) | 2002-02-08 |
Family
ID=18721857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000228607A Pending JP2002042741A (en) | 2000-07-28 | 2000-07-28 | Sealed angular flat battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002042741A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007220413A (en) * | 2006-02-15 | 2007-08-30 | Sanyo Electric Co Ltd | Square battery |
| JP2008251340A (en) * | 2007-03-30 | 2008-10-16 | Sanyo Electric Co Ltd | Rectangular battery |
| US8129048B2 (en) | 2006-02-21 | 2012-03-06 | Panasonic Corporation | Method for producing rectangular flat secondary battery |
| JP2017134931A (en) * | 2016-01-26 | 2017-08-03 | 古河電池株式会社 | Metal air battery, and sheet material for metal air battery |
-
2000
- 2000-07-28 JP JP2000228607A patent/JP2002042741A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007220413A (en) * | 2006-02-15 | 2007-08-30 | Sanyo Electric Co Ltd | Square battery |
| US8129048B2 (en) | 2006-02-21 | 2012-03-06 | Panasonic Corporation | Method for producing rectangular flat secondary battery |
| JP2008251340A (en) * | 2007-03-30 | 2008-10-16 | Sanyo Electric Co Ltd | Rectangular battery |
| JP2017134931A (en) * | 2016-01-26 | 2017-08-03 | 古河電池株式会社 | Metal air battery, and sheet material for metal air battery |
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