JPH1197055A - Non-cylindrical battery and manufacture of it - Google Patents
Non-cylindrical battery and manufacture of itInfo
- Publication number
- JPH1197055A JPH1197055A JP9250809A JP25080997A JPH1197055A JP H1197055 A JPH1197055 A JP H1197055A JP 9250809 A JP9250809 A JP 9250809A JP 25080997 A JP25080997 A JP 25080997A JP H1197055 A JPH1197055 A JP H1197055A
- Authority
- JP
- Japan
- Prior art keywords
- electrode group
- wound electrode
- wound
- cylindrical battery
- flat plate
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、正極と負極をセパ
レータを介して捲回した捲回電極群を非円筒形の電池ケ
ースに収容した非円筒形電池及びその製造法に関するも
のである。詳しくは、このような非円筒形電池の高率放
電性能改善に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-cylindrical battery in which a wound electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween is accommodated in a non-cylindrical battery case, and a method of manufacturing the same. More specifically, the present invention relates to improvement of high-rate discharge performance of such a non-cylindrical battery.
【０００２】[0002]
【従来の技術】従来、捲回電極群を角柱形電池ケースに
収容するには、ほぼ円柱形状に捲回した捲回電極群を加
圧して横断面を長円ないしは楕円形にした非円柱形状の
捲回電極群を収容する方法と、初めから非円柱形状に捲
回した捲回電極群を収容する方法とがある。前者の方法
では、捲回電極群を非円柱形状にする時に過度な圧力が
加えられることとなり、電極活物質が脱落したり、電極
自身が圧力に耐えられずに破断する問題が生じる。後者
の方法によれば前者の問題は回避できる。後者の方法を
実現するには、例えば特開平６−１６８７３６号公報に
示されている様に平板状の軸芯を用いて電極とセパレー
タを捲回し、捲回後に前記軸芯を抜き取る技術がある。
後者の方法から得られる捲回電極群には、捲回中心部に
抜き取った軸芯分だけの空間ができてしまう。この空間
が存在すると捲回電極群は、捲回時に受けていた圧力が
低下し、その結果電池になった後で電極を加圧する力が
低下する問題が生じる。電極を加圧する力が弱まると、
電極活物質と集電体との密着性が良好でなくなり高率放
電特性が悪化したり、活物質が容易に集電体から剥離、
脱落して充放電サイクル性能が劣る。電極を加圧する手
段として、正極と負極をセパレータを介して積層した電
極群を用いた角柱形電池の例が、特開平５−１３０５４
号公報に開示されている。この技術では、電池ケースの
電極積層面に相対する壁面を内側に湾曲させて電極群を
その積層方向に加圧し、電極活物質と集電体との密着性
を良好なものとしている。2. Description of the Related Art Conventionally, in order to accommodate a wound electrode group in a prismatic battery case, a substantially cylindrical wound electrode group is pressed to form a non-cylindrical shape having a cross section of an ellipse or an ellipse. And a method of accommodating a wound electrode group wound from the beginning into a non-cylindrical shape. In the former method, excessive pressure is applied when the wound electrode group is formed into a non-cylindrical shape, which causes a problem that the electrode active material falls off or the electrode itself breaks because it cannot withstand the pressure. According to the latter method, the former problem can be avoided. In order to realize the latter method, for example, as shown in JP-A-6-168736, there is a technique in which an electrode and a separator are wound using a plate-shaped shaft core, and the shaft core is removed after winding. .
In the wound electrode group obtained by the latter method, a space corresponding to the extracted axial center is formed at the center of the wound electrode. When this space is present, the pressure applied to the wound electrode group at the time of winding decreases, and as a result, a problem arises in that the force for pressing the electrodes after the battery is formed decreases. When the force to press the electrode weakens,
The adhesion between the electrode active material and the current collector is not good, and the high-rate discharge characteristics are deteriorated, or the active material is easily peeled from the current collector,
It falls off and the charge / discharge cycle performance is inferior. As a means for pressurizing the electrodes, an example of a prismatic battery using an electrode group in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween is disclosed in JP-A-5-13054.
No. 6,086,045. In this technique, the wall surface of the battery case facing the electrode stacking surface is curved inward to press the electrode group in the stacking direction, thereby improving the adhesion between the electrode active material and the current collector.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の特開平
５−１３０５４号公報の技術では、電極群は電極の積層
方向に加圧されるだけである。従って、角柱形電池ケー
スに収容した捲回電極群にこの技術を適用しても、捲回
電極群は湾曲した相対する壁面の間で加圧されるだけで
あり、この加圧方向と直交する方向には加圧されないた
め、その部分が加圧不足となる。本発明が解決しようと
する課題は、横断面が長円ないしは楕円形の非円柱形状
の捲回電極群を非円筒形の電池ケースに収容した非円筒
形電池において、捲回電極群をほぼ全周から加圧できる
非円筒形電池を提供することである。However, in the technique disclosed in Japanese Patent Application Laid-Open No. Hei 5-13054, the electrode group is merely pressed in the direction in which the electrodes are stacked. Therefore, even if this technique is applied to the wound electrode group housed in the prismatic battery case, the wound electrode group is only pressed between the curved opposite wall surfaces, and is orthogonal to the pressing direction. Since no pressure is applied in the direction, the portion is under-pressed. An object of the present invention is to provide a non-cylindrical battery in which a non-cylindrical battery case accommodates a non-cylindrical wound electrode group having an elliptical or elliptical cross section. An object of the present invention is to provide a non-cylindrical battery that can be pressurized from the periphery.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明に係る非円筒形電池は、正極１１と負極１
２をセパレータ１３を介して捲回した捲回電極群４を非
円筒形の電池ケース６に収容した電池において、捲回電
極群４の捲回中心に耐電解液性の変形可能部材１を配置
してなり、変形可能部材１は、捲回電極群４側面の相対
する一方向から受けた加圧力で変形し、当該加圧方向と
直交する方向に捲回電極群４を押圧した状態にあること
を特徴とする。変形可能部材１は、捲回電極群４上端か
ら下端までの実質的に全域に亘って捲回中心に配置され
る。この変形可能部材１を捲回電極群の捲回中心に配置
し（図３）、捲回電極群外寸を電池ケース内寸よりも大
きする等し、捲回電極群を電池ケースに収容する時に捲
回電極群を側面から加圧圧縮して電池ケースへの収容を
可能とする。そして捲回電極群の圧縮変形とともに、変
形可能部材１も扁平に圧縮変形されることにより、変形
可能部材１が捲回電極群を内側から押圧するように作用
する（図５）。上記変形可能部材１の具体例として、図
１に示すような横断面が楕円形の筒状体や、図示しない
が流体（液体、気体、ゾル、粉体等）を耐電解液性の延
伸可能な材質からなる袋に封入したもの等が挙げられ
る。また上記変形可能部材は弾性体であることが、変形
・復元を繰り返す意味で好ましい。また上記変形可能部
材の材質はプラスチックや金属が好適である。In order to solve the above-mentioned problems, a non-cylindrical battery according to the present invention comprises a positive electrode 11 and a negative electrode 1.
In a battery in which a wound electrode group 4 formed by winding the second electrode 2 via a separator 13 is accommodated in a non-cylindrical battery case 6, an electrolysis-resistant deformable member 1 is arranged at the center of the wound electrode group 4. In this state, the deformable member 1 is deformed by a pressing force received from one side of the side surface of the wound electrode group 4 and presses the wound electrode group 4 in a direction orthogonal to the pressing direction. It is characterized by the following. The deformable member 1 is arranged at the center of the wound over substantially the entire region from the upper end to the lower end of the wound electrode group 4. The deformable member 1 is disposed at the center of the wound electrode group (FIG. 3), and the wound electrode group is housed in the battery case by making the outer dimension of the wound electrode group larger than the inner dimension of the battery case. At times, the wound electrode group is pressurized and compressed from the side so that it can be housed in the battery case. The deformable member 1 is also flatly compressed and deformed together with the compression deformation of the wound electrode group, so that the deformable member 1 acts to press the wound electrode group from the inside (FIG. 5). As a specific example of the deformable member 1, a tubular body having an elliptical cross section as shown in FIG. 1 or a fluid (liquid, gas, sol, powder, or the like) (not shown) which can be stretched to have an electrolytic solution resistance. And those sealed in bags made of various materials. In addition, it is preferable that the deformable member is an elastic body from the viewpoint of repeating deformation and restoration. The material of the deformable member is preferably plastic or metal.
【０００５】また、上記の課題を解決するための上記と
は別の本発明に係る非円筒形電池は、正極１１と負極１
２をセパレータ１３を介して捲回した捲回電極群４を非
円筒形の電池ケース６に収容した電池であり、捲回電極
群４の捲回中心に少なくとも２枚の平板部材を実質的に
同一平面上に配置するとともに平板部材間には楔部材を
配置してなり、前記平板部材は、捲回電極群４が平板部
材の平面に直角な方向から受けた加圧力で平板部材間に
侵入した楔部材により平板部材間隔を広げられて、捲回
電極群４を押圧した状態にあることを特徴とする。図２
に、捲回中心に配置する平板部材２ａ、２ｂと楔部材３
の一例を示す。少なくとも１つの側面が丸みを帯びた２
枚の平板部材２ａ、２ｂと楔部材３からなり、２枚の平
板部材の丸みを帯びた側面と楔部材の側面とが接触した
状態にある。平板部材と楔部材を上記のような位置関係
のまま捲回電極群４の捲回中心に配置し（図４）、捲回
電極群４外寸を電池ケース６内寸よりも大きする等し、
捲回電極群４を電池ケース６に収容する時に捲回電極群
４を側面から加圧圧縮して電池ケース６への収容を可能
とする。捲回電極群４の圧縮は、平板部材２ａ、２ｂの
平面に直角な方向から行い、この時の圧力で、楔部材３
が平板部材２ａ、２ｂ間に侵入し、平板部材２ａ、２ｂ
間隔を広げて捲回電極群４を内側から押圧するように作
用する（図６）。平板部材２ａ、２ｂ及び楔部材３の
数、形状等は、上記作用を有する範囲で変更可能であ
る。[0005] Further, a non-cylindrical battery according to the present invention, which is different from the above, for solving the above problems, comprises a positive electrode 11 and a negative electrode 1
2 is a battery in which a wound electrode group 4 formed by winding a separator 2 through a separator 13 is accommodated in a non-cylindrical battery case 6, and at least two flat members are substantially wound around the center of the wound electrode group 4. It is arranged on the same plane and a wedge member is arranged between the flat plate members. The flat plate member penetrates between the flat plate members by a pressing force that the wound electrode group 4 receives from a direction perpendicular to the flat surface of the flat plate member. The gap between the flat plate members is widened by the wedge member and the wound electrode group 4 is pressed. FIG.
The flat plate members 2a and 2b and the wedge member 3
An example is shown below. 2 with at least one side rounded
The two flat plate members 2a and 2b and the wedge member 3 are in a state where the rounded side surfaces of the two flat plate members are in contact with the side surfaces of the wedge member. The flat plate member and the wedge member are arranged at the center of the winding of the wound electrode group 4 in the above positional relationship (FIG. 4), and the outer dimension of the wound electrode group 4 is larger than the inner dimension of the battery case 6. ,
When the wound electrode group 4 is accommodated in the battery case 6, the wound electrode group 4 is pressurized and compressed from the side surface so that the wound electrode group 4 can be accommodated in the battery case 6. The compression of the wound electrode group 4 is performed from a direction perpendicular to the plane of the flat plate members 2a and 2b.
Penetrates between the plate members 2a, 2b, and the plate members 2a, 2b
It acts so as to press the wound electrode group 4 from the inside while increasing the interval (FIG. 6). The number, shape, and the like of the flat plate members 2a and 2b and the wedge member 3 can be changed within a range having the above-described operation.
【０００６】前者（図１の変形可能部材１）は電池ケー
ス６の横断面が正方形あるいはそれに類似した形状の非
円筒形電池でも、横断面が図５に示した長方形あるいは
それに類似した形状のものでも、どちらでも適用可能で
ある。上記電池ケース６の横断面が正方形あるいはそれ
に類似した形状の場合についても、捲回電極群４形状を
電池ケース収容前と収容後で異ならせる等して、前述し
た作用を実現することは可能である。後者（図２の平板
部材２ａ、２ｂと楔部材３）は、電池ケース６の横断面
が長方形である角柱形あるいはそれに類似した形状の電
池に適している。前記類似した形状とは、横断面が図６
のものや、その側面角部が丸みを帯びているもの、長円
形状や楕円形状のものである。The former (deformable member 1 in FIG. 1) is a non-cylindrical battery having a battery case 6 having a square cross section or a similar shape, but having a rectangular cross section as shown in FIG. 5 or a similar shape. But either is applicable. Even in the case where the cross section of the battery case 6 is a square or a shape similar thereto, it is possible to realize the above-described operation by changing the shape of the wound electrode group 4 before and after the battery case is accommodated. is there. The latter (the flat plate members 2a and 2b and the wedge member 3 in FIG. 2) is suitable for a battery having a prismatic shape in which the cross section of the battery case 6 is rectangular or a shape similar thereto. The similar shape is the same as that in FIG.
, Those with rounded side corners, oval or elliptical shapes.
【０００７】角柱形電池を相対する一組の壁面の外側か
ら加圧した状態で使用すると、捲回電極群４は加圧され
て扁平になる。この扁平になる方向を、捲回電極群４を
電池ケース６に圧入するときに扁平にする方向と一致さ
せておくことにより、変形可能部材１はさらに扁平にな
る。また、平板部材２ａ、２ｂ間隔は楔部材３の侵入に
よりさらに広がる。これによって変形可能部材１は、扁
平になる方向の押圧力を捲回極板群４にその内側から与
える。また平板部材２ａ、２ｂは、部材間隔が広がる方
向の押圧力を捲回電極群４にその内側から与える。それ
により、極板の集電体／活物質間の密着性が捲回電極群
全域に亘り良好になる。When the prismatic battery is used in a state where it is pressurized from the outside of a pair of opposing wall surfaces, the wound electrode group 4 is pressurized and flattened. By making the flattening direction coincide with the flattening direction when the wound electrode group 4 is pressed into the battery case 6, the deformable member 1 is further flattened. Further, the interval between the flat plate members 2 a and 2 b is further increased by the intrusion of the wedge member 3. Thereby, the deformable member 1 applies a pressing force in the direction of flattening to the wound electrode plate group 4 from the inside thereof. Further, the flat plate members 2a and 2b apply a pressing force in a direction in which the member interval is widened to the wound electrode group 4 from the inside. Thereby, the adhesion between the current collector and the active material of the electrode plate is improved over the entire wound electrode group.
【０００８】また変形可能部材１又は平板部材２ａ、２
ｂと楔部材３を、電極を捲回する工程時の軸芯又はその
一部を兼ねたものとし、捲回工程後軸芯ごと又はその一
部分を切りはなして捲回中心に残すことで、変形可能部
材１又は平板部材２ａ、２ｂと楔部材３を後工程で配置
する必要がなくなり、製造工程が簡略化できる。さら
に、変形可能部材１又は平板部材２ａ、２ｂと楔部材３
と電極群の密着性が向上する利点がある。The deformable member 1 or the flat members 2a, 2
b and the wedge member 3 also serve as the axis or part of the axis during the step of winding the electrode, and after the winding step, the entire axis or part of the axis is cut off and left at the center of the wound to deform. There is no need to dispose the possible member 1 or the flat members 2a and 2b and the wedge member 3 in a later step, and the manufacturing process can be simplified. Further, the deformable member 1 or the flat plate members 2a and 2b and the wedge member 3
There is an advantage that the adhesiveness of the electrode group is improved.
【０００９】本発明は、集電体が導電性の板あるいは箔
あるいは膜であり、活物質が集電体面上に配された捲回
電極群を用いる角柱形電池に特に有効に作用すると考え
られる。その理由は、三次元構造の集電体は二次元集電
体（導電性の板あるいは箔あるいは膜）よりも活物質保
持能力に優れ、活物質／集電体接触面積も大きくなるよ
う設計しやすく、電極の加圧に依存する要因が少ないと
考えられるためである。二次元集電体を用いている電極
を有する電池の代表例は、現在普及が進んでいるリチウ
ムイオン二次電池である。リチウムイオン二次電池の正
極の中でも、活物質組成がＬｉxＭｎ2-yＡyＯ4（０．１
≦ｘ≦１．１、０≦ｙ≦０．３、Ａは遷移金属から選ば
れる１種以上からなる）で示される、いわゆるマンガン
系の正極は、それ自身の導電性が別の正極活物質ＬｉＣ
ｏＯ2より劣ることが知られている。従ってマンガン系
の正極を有する捲回電極群を用いた角柱形リチウムイオ
ン二次電池では、本発明は特に有効であると考えられ
る。The present invention is considered to be particularly effective for a prismatic battery in which the current collector is a conductive plate, foil, or film, and the active material uses a wound electrode group disposed on the current collector surface. . The reason is that the current collector with the three-dimensional structure is designed to have a higher active material holding capacity and a larger contact area between the active material and the current collector than the two-dimensional current collector (conductive plate, foil or film). This is because it is considered that there are few factors depending on the pressure of the electrode. A typical example of a battery having an electrode using a two-dimensional current collector is a lithium-ion secondary battery that is currently spreading. Among the positive electrodes of the lithium ion secondary battery, the active material composition is Li x Mn 2-y A y O 4 (0.1
≦ x ≦ 1.1, 0 ≦ y ≦ 0.3, and A is at least one selected from transition metals). LiC
be inferior to oO 2 are known. Therefore, the present invention is considered to be particularly effective in a prismatic lithium ion secondary battery using a wound electrode group having a manganese-based positive electrode.
【００１０】[0010]
【発明の実施の形態】本発明に係る非円筒形電池が角柱
形リチウムイオン二次電池の場合について以下に説明す
る。本発明は非円柱形状に捲回された電極群に適用でき
るもので、電池の種類に限定されるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS The case where the non-cylindrical battery according to the present invention is a prismatic lithium ion secondary battery will be described below. The present invention is applicable to an electrode group wound in a non-cylindrical shape, and is not limited to the type of battery.
【００１１】（正極の作製方法）正極は次のように作製
した。厚み２０μｍのアルミニウム箔を導電性芯材と
し、芯材両面にコバルト酸リチウム（ＬｉＣｏＯ2）粉
末８８重量部、ポリフッ化ビニリデン４重量部をＮ−メ
チルピロリドン溶媒に分散させた正極合剤スラリを塗布
する。その後、乾燥して所定の厚みまでロールプレスに
より加圧して正極を完成させる。(Preparation Method of Positive Electrode) The positive electrode was prepared as follows. A 20 μm-thick aluminum foil is used as a conductive core material, and a positive electrode mixture slurry in which 88 parts by weight of lithium cobalt oxide (LiCoO 2 ) powder and 4 parts by weight of polyvinylidene fluoride are dispersed in an N-methylpyrrolidone solvent is applied to both sides of the core material. I do. Then, it is dried and pressed by a roll press to a predetermined thickness to complete the positive electrode.
【００１２】（負極の作製方法）厚み２０μｍの銅箔を
導電性芯材とし、芯材両面に球状のメソカーボンマイク
ロビーズ（粒径１〜５０μｍ、ｄ002＝３．３６６オン
グストローム）粉末９０重量部、ポリフッ化ビニリデン
１０重量部をＮ−メチルピロリドン溶媒に分散させた負
極合剤を塗布する。その後、乾燥して所定の厚みまでロ
ールプレスにより加圧して負極を完成させる。(Production Method of Negative Electrode) 90 parts by weight of spherical mesocarbon microbeads (particle diameter: 1 to 50 μm, d 002 = 3.366 angstroms) on both surfaces of a copper core having a thickness of 20 μm as a conductive core. Then, a negative electrode mixture in which 10 parts by weight of polyvinylidene fluoride is dispersed in an N-methylpyrrolidone solvent is applied. After that, it is dried and pressed by a roll press to a predetermined thickness to complete the negative electrode.
【００１３】（電池１の作製）ポリエチレン製の微多孔
膜をセパレータとし、前記、正負極の間に介在させて、
捲回軸心を有する捲回装置を用い、横断面が長円形の捲
回電極群４を構成する（図３）。このとき、捲回電極群
４の短径側の外寸を僅かに電池ケース６内寸よりも大き
くしておく。捲回電極群の捲回中心には、図１に示す筒
状体を配置する。筒状体はニッケルメッキした厚み０．
１ｍｍの鋼板を筒状に成形したものを用いた。この筒状
体は僅かながら外力に対して弾性体的な挙動をする。筒
状体の捲回中心への配置方法は、筒状体を上記捲回軸心
にはめ合わせて捲回作業を行い、捲回作業終了後図３に
示すように、捲回中心に筒状体が残すよう捲回軸心のみ
を抜き取る操作を実施するものである。図３に示す捲回
電極群４を角柱形の電池ケース６に挿入した状態での横
断面図を図５に示す。筒状体は、図３の状態から扁平に
変形しているのがわかる。つまり電池ケース６に捲回電
極群４を挿入したときに、捲回電極群４とともに筒状体
も圧縮され変形して扁平になるので、捲回電極群４は図
５における変形方向１０にも押圧されている。また、電
池ケース壁面７、８と捲回電極群４との間にも筒状体の
変形に伴う押圧力がはたらいている。(Preparation of Battery 1) A microporous polyethylene membrane was used as a separator, and was interposed between the positive and negative electrodes.
A wound electrode group 4 having an oval cross section is formed using a winding device having a wound axis (FIG. 3). At this time, the outer dimension on the minor diameter side of the wound electrode group 4 is slightly larger than the inner dimension of the battery case 6. The tubular body shown in FIG. 1 is arranged at the center of the wound electrode group. The cylindrical body has a nickel-plated thickness of 0.1 mm.
A 1 mm steel plate formed into a cylindrical shape was used. This cylindrical body slightly behaves like an elastic body against an external force. As for the method of arranging the cylindrical body at the center of the winding, the winding operation is performed by fitting the cylindrical body to the winding axis, and after the completion of the winding operation, as shown in FIG. An operation of extracting only the winding axis so that the body remains is performed. FIG. 5 shows a cross-sectional view in a state where the wound electrode group 4 shown in FIG. 3 is inserted into the prismatic battery case 6. It can be seen that the tubular body is deformed flat from the state of FIG. That is, when the wound electrode group 4 is inserted into the battery case 6, the cylindrical body is also compressed and deformed and flattened together with the wound electrode group 4, so that the wound electrode group 4 is also deformed in the deformation direction 10 in FIG. Pressed. Further, a pressing force due to the deformation of the cylindrical body also acts between the battery case wall surfaces 7 and 8 and the wound electrode group 4.
【００１４】電池ケース６に出力端子部及び電解液注液
口を備えたステンレス製の電池蓋をレーザ溶接して封止
する。その後、エチレンカーボネイトとジメチルカーボ
ネイトとの混合溶媒（１：１容積比）に１ｍｏｌ／ｌの
六フッ化リン酸リチウムを溶解した電解液を注入し、そ
の後注液口を封止して角柱形電池を完成する。本例では
電池ケース６にステンレス材を用いたが、通常の使用状
態で非円柱形状の電極群を加圧するのに耐え得る強度を
有するものであれば他の材質でも構わない。A battery cover made of stainless steel provided with an output terminal portion and an electrolyte inlet is sealed to the battery case 6 by laser welding. Thereafter, an electrolytic solution in which 1 mol / l of lithium hexafluorophosphate was dissolved in a mixed solvent (1: 1 volume ratio) of ethylene carbonate and dimethyl carbonate was injected, and then the injection port was sealed to form a prismatic battery. To complete. In this example, a stainless steel material is used for the battery case 6, but any other material may be used as long as it has a strength enough to withstand the pressure of the non-cylindrical electrode group in a normal use state.
【００１５】図５において、捲回電極群４をさらに扁平
にする方向に、角柱形の電池ケース６の側面をに加圧し
たと仮定する（図５では加圧方向９。これは、実際の電
池を使用する際に最も高い確率で加圧される方向であ
る）。すると筒状体は、加圧方向９と直交する外側方向
（変形方向１０）に加圧力を与える。従って前述したよ
うな、捲回電極群４の加圧方向と平行に電極が積層され
た部分の加圧不足は解消される。In FIG. 5, it is assumed that the side surface of the prismatic battery case 6 is pressed in a direction to further flatten the wound electrode group 4 (in FIG. 5, the pressing direction 9 is an actual pressing direction 9). This is the direction that is most likely to be pressurized when using batteries.) Then, the cylindrical body applies a pressing force in an outer direction (deformation direction 10) orthogonal to the pressing direction 9. Therefore, the insufficient pressurization of the portion where the electrodes are stacked in parallel with the pressurizing direction of the wound electrode group 4 as described above is resolved.
【００１６】（電池２の作製）本発明に係る別の実施の
形態では、捲回電極群４の捲回中心図２に示した平板部
材２ａ、２ｂと楔部材３をに配置する。側面が曲面をな
すポリプロピレン製の平板部材２ａ、２ｂを、前記曲面
が隣り合うよう配置し、隣り合った線上にポリプロピレ
ン製の円柱状楔部材３を配置する。平板部材２ａ、２ｂ
と楔部材３を前記配置状態のまま捲回装置の軸心部に取
り付け、上記した正極１１、負極１２とセパレータ１３
を捲回する。このとき、捲回電極群４の短径側の外寸は
僅かに電池ケース６内寸よりも大きくしておく。本例で
は平板部材２ａ、２ｂと楔部材３を全てポリプロピレン
にて構成したが、捲回時の捲回圧力に耐え得る剛性を有
しているものなら他の材質でも構わない。図４に捲回さ
れた非円柱形状の捲回電極群４の横断面図を示す。捲回
電極群４は平板部材２ａ、２ｂと楔部材３を中心に非円
柱形状に捲回されている。電池ケース６に収容した後の
工程は電池１の作製条件と同条件とした。図６に電池ケ
ース６に収容された捲回電極群４を示す。図４の捲回電
極群４をステンレス製の電池ケース６に圧入すると、電
池ケース６の壁面７、８により捲回電極群４が加圧方向
９から加圧される。この加圧を受けると楔部材３が平板
部材２ａと２ｂの間に侵入し、平板部材２ａと２ｂを広
げる。これにより、捲回電極群４はその内側からも変形
方向１０に加圧（押圧）を受けて、電極群の活物質／集
電体の密着性は格段に向上する。(Fabrication of Battery 2) In another embodiment according to the present invention, the center of the wound electrode group 4 is disposed on the flat plate members 2a and 2b and the wedge member 3 shown in FIG. The flat plate members 2a and 2b made of polypropylene having a curved side surface are arranged so that the curved surfaces are adjacent to each other, and the columnar wedge member 3 made of polypropylene is arranged on an adjacent line. Flat plate members 2a, 2b
The wedge member 3 and the wedge member 3 are attached to the shaft center of the winding device in the above arrangement state, and the above-described positive electrode 11, negative electrode 12 and separator 13 are mounted.
Is wound. At this time, the outer dimension on the minor diameter side of the wound electrode group 4 is slightly larger than the inner dimension of the battery case 6. In this example, the flat plate members 2a and 2b and the wedge member 3 are all made of polypropylene, but other materials may be used as long as they have rigidity to withstand the winding pressure during winding. FIG. 4 shows a cross-sectional view of the wound non-columnar wound electrode group 4. The wound electrode group 4 is wound in a non-cylindrical shape around the flat plate members 2 a and 2 b and the wedge member 3. The process after being housed in the battery case 6 was the same as the manufacturing condition of the battery 1. FIG. 6 shows the wound electrode group 4 housed in the battery case 6. When the wound electrode group 4 of FIG. 4 is pressed into the battery case 6 made of stainless steel, the wound electrode group 4 is pressed from the pressing direction 9 by the wall surfaces 7 and 8 of the battery case 6. When this pressure is applied, the wedge member 3 enters between the flat plate members 2a and 2b and spreads the flat plate members 2a and 2b. As a result, the wound electrode group 4 is also pressed (pressed) in the deformation direction 10 from the inside thereof, and the adhesiveness of the active material / current collector of the electrode group is significantly improved.
【００１７】本例では電池１、電池２共に電池ケース６
の形状として角柱状のものを用いたが、例えば角柱の側
面角部が丸みを帯びた形状のもの、横断面が長円形ない
し楕円形状のもの等の非円筒形電池ケースを用いても同
様な効果を得られる。In this embodiment, both the battery 1 and the battery 2 have a battery case 6.
Although the prismatic shape was used as the shape of the prism, for example, the same applies when using a non-cylindrical battery case such as a prismatic shape having rounded side corners, an oval or elliptical cross section. The effect can be obtained.
【００１８】[0018]
【実施例】比較として、変形可能部材１、平板部材２
ａ、２ｂと楔部材３を配置しない以外は電池１、電池２
と同条件で角柱形電池（従来例）を作製した。そして電
池１、電池２、従来例の３種類の電池について以下の比
較検討をした。図７に各角柱形電池を満充電状態から３
ＣｍＡで放電した時の放電容量を示す。ここでは従来例
の電池の放電容量を１００％としたときの相対値で示し
ている。本発明の角柱形電池（電池１、電池２）は従来
例に比べ捲回電極群４をほぼ全周から加圧できる構成で
あるため、放電容量が格段に向上したことがわかる。DESCRIPTION OF THE PREFERRED EMBODIMENTS As a comparison, a deformable member 1, a flat plate member 2
a, 2b and the batteries 1 and 2 except that the wedge member 3 is not provided.
Under the same conditions as above, a prismatic battery (conventional example) was produced. The following comparative study was conducted on the three types of batteries, Battery 1, Battery 2, and Conventional Example. FIG. 7 shows that each prismatic battery was fully charged 3 times.
It shows the discharge capacity when discharging at CmA. Here, the relative values are shown assuming that the discharge capacity of the conventional battery is 100%. Since the prismatic batteries (battery 1 and battery 2) of the present invention have a configuration in which the wound electrode group 4 can be pressed from almost the entire circumference as compared with the conventional example, it can be seen that the discharge capacity has been significantly improved.
【００１９】図８に本発明の角柱形電池（電池１、電池
２）の１ＣｍＡ充放電サイクル特性を示す。本発明の角
柱形電池（電池１、電池２）は従来例に比べて捲回電極
群４のほぼ全体を加圧できる構成であるため、寿命特性
が向上したことがわかる。FIG. 8 shows 1 CmA charge / discharge cycle characteristics of the prismatic batteries (battery 1 and battery 2) of the present invention. It can be seen that the prismatic batteries (battery 1 and battery 2) of the present invention have a configuration in which almost the entire wound electrode group 4 can be pressurized as compared with the conventional example, and thus have improved life characteristics.
【００２０】[0020]
【発明の効果】本発明により、非円柱形状の捲回電極群
４を電池ケース６内に内蔵する非円筒形電池において、
捲回電極群４をほぼ全周を加圧できる非円筒形電池を提
供することができた。それにより高率放電特性、充放電
サイクル寿命特性が良好になった。According to the present invention, in a non-cylindrical battery in which the non-cylindrical wound electrode group 4 is built in the battery case 6,
It was possible to provide a non-cylindrical battery capable of pressing the wound electrode group 4 almost all around. Thereby, high rate discharge characteristics and charge / discharge cycle life characteristics were improved.
【図１】本発明に係る電池で使用する変形可能部材の一
例を示す斜視図である。FIG. 1 is a perspective view showing an example of a deformable member used in a battery according to the present invention.
【図２】本発明に係る電池で使用する平板部材２ａ、２
ｂと楔部材３の一例を示す斜視図である。FIG. 2 shows a flat plate member 2a, 2a used in the battery according to the present invention.
FIG. 4 is a perspective view showing an example of a wedge member 3 with the reference numeral b.
【図３】本発明の実施の形態における捲回電極群の横断
面を示した図である。FIG. 3 is a diagram showing a cross section of a wound electrode group according to the embodiment of the present invention.
【図４】本発明の別の実施の形態における捲回電極群を
示した図である。FIG. 4 is a diagram showing a wound electrode group according to another embodiment of the present invention.
【図５】本発明の実施の形態の角柱形電池の横断面を示
した図である。FIG. 5 is a diagram showing a cross section of the prismatic battery according to the embodiment of the present invention.
【図６】本発明の別の実施の形態の角柱形電池の横断面
を示した図である。FIG. 6 is a diagram showing a cross section of a prismatic battery according to another embodiment of the present invention.
【図７】電池を高率放電させたときの放電容量を相対値
で比較した図である。FIG. 7 is a diagram comparing discharge capacities when batteries are discharged at a high rate with relative values.
【図８】電池のサイクル特性を示した図である。FIG. 8 is a diagram showing cycle characteristics of a battery.
１．変形可能部材 ２ａ、２ｂ．平板部材 ３．楔部材 ４．捲回電極群 ６．電池ケース ７、８．電池ケース壁面 ９．加圧方向 １０．変形方向 １１．正極 １２．負極 １３．セパレータ 1. Deformable members 2a, 2b. Flat plate member 3. Wedge member 4. 5. Wound electrode group Battery case 7,8. Battery case wall 9. Pressing direction 10. Deformation direction 11. Positive electrode 12. Negative electrode 13. Separator
Claims (9)
捲回電極群を非円筒形の電池ケースに収容した電池にお
いて、 捲回電極群の捲回中心に耐電解液性の変形可能部材を配
置してなり、当該変形可能部材は、捲回電極群側面の相
対する一方向から受けた加圧力で変形し、当該加圧方向
と直交する方向に捲回電極群を押圧した状態にあること
を特徴とする非円筒形電池。1. A battery in which a wound electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween is housed in a non-cylindrical battery case. The deformable member is deformed by a pressing force received from one direction facing the side surface of the wound electrode group, and is in a state of pressing the wound electrode group in a direction orthogonal to the pressing direction. Non-cylindrical battery characterized by the above-mentioned.
する請求項１記載の非円筒形電池。2. The non-cylindrical battery according to claim 1, wherein the deformable member is an elastic body.
する請求項１又は２記載の非円筒形電池。3. The non-cylindrical battery according to claim 1, wherein the deformable member is a cylindrical body.
捲回電極群を非円筒形の電池ケースに収容した電池にお
いて、 捲回電極群の捲回中心に少なくとも２枚の平板部材を実
質的に同一平面上に配置するとともに平板部材間には楔
部材を配置してなり、 前記平板部材は、捲回電極群が平板部材の平面に直角な
方向から受けた加圧力で平板部材間に侵入した楔部材に
より平板部材間隔を広げられ、捲回電極群を押圧した状
態にあることを特徴とする非円筒形電池。4. A battery in which a wound electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween is housed in a non-cylindrical battery case. And a wedge member is disposed between the flat plate members, and the flat plate member is disposed between the flat plate members by a pressing force that the wound electrode group receives from a direction perpendicular to the plane of the flat plate member. A non-cylindrical battery in which the distance between the flat plate members is widened by the penetrating wedge member and the wound electrode group is pressed.
あるいは箔あるいは膜であり、活物質が集電体面上に配
されている請求項１〜４のいずれかに記載の非円筒形電
池。5. The non-electrode according to claim 1, wherein the current collector of the positive electrode and / or the negative electrode is a conductive plate, foil or film, and the active material is disposed on the surface of the current collector. Cylindrical battery.
捲回電極群を非円筒形の電池ケースに収容する電池の製
造法において、 捲回電極群の捲回中心に耐電解液性の変形可能部材を配
置する工程と、捲回電極群を相対する一方向の側面から
加圧して電池ケースに圧入する工程を経、前記加圧力で
変形可能部材を扁平に変形させて、当該変形可能部材が
前記加圧力と直交する方向に捲回電極群を押圧すること
を特徴とする非円筒形電池の製造法。6. A method for producing a battery in which a wound electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween is accommodated in a non-cylindrical battery case. A step of arranging the deformable member and a step of pressing the wound electrode group from the opposite side surface in one direction and press-fitting the wound electrode group into the battery case. A method for manufacturing a non-cylindrical battery, wherein a member presses a wound electrode group in a direction orthogonal to the pressing force.
の一部を兼ねることを特徴とする請求項６記載の非円筒
形電池の製造法。7. The method for producing a non-cylindrical battery according to claim 6, wherein the deformable member also serves as a shaft core or a part thereof in a winding step.
捲回電極群を非円筒形の電池ケースに収容する電池の製
造法において、 捲回電極群の捲回中心に少なくとも２枚の平板部材を実
質的に同一平面上に配置するとともに平板部材間には楔
部材を配置する工程と、 捲回電極群を平板部材の平面に直角な方向から加圧して
電池ケースに圧入する工程を経、前記加圧力で楔部材を
平板部材間に侵入させて平板部材間隔を広げ、捲回電極
群を平板部材間隔が広がる方向に押圧することを特徴と
する非円筒形電池の製造法。8. A method for manufacturing a battery in which a wound electrode group in which a positive electrode and a negative electrode are wound with a separator interposed therebetween is housed in a non-cylindrical battery case, wherein at least two flat plates are wound around the wound center of the wound electrode group. A step of arranging the members substantially on the same plane and arranging a wedge member between the plate members, and a step of press-fitting the wound electrode group into the battery case by pressing the wound electrode group from a direction perpendicular to the plane of the plate members. A method of manufacturing a non-cylindrical battery, wherein the pressing force causes a wedge member to enter between the flat plate members to widen the flat plate member interval, and presses the wound electrode group in a direction in which the flat plate member interval increases.
又はその一部を兼ねたものであることを特徴とする請求
項８記載の非円筒形電池の製造法。9. The method for manufacturing a non-cylindrical battery according to claim 8, wherein the flat plate member and the wedge member also serve as a shaft core or a part thereof in a winding step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25080997A JP3533903B2 (en) | 1997-09-16 | 1997-09-16 | Non-cylindrical battery and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25080997A JP3533903B2 (en) | 1997-09-16 | 1997-09-16 | Non-cylindrical battery and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1197055A true JPH1197055A (en) | 1999-04-09 |
| JP3533903B2 JP3533903B2 (en) | 2004-06-07 |
Family
ID=17213379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25080997A Expired - Fee Related JP3533903B2 (en) | 1997-09-16 | 1997-09-16 | Non-cylindrical battery and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3533903B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002280055A (en) * | 2001-03-21 | 2002-09-27 | Shin Kobe Electric Mach Co Ltd | Flat wound group manufacturing method and winding device |
| WO2007097172A1 (en) * | 2006-02-21 | 2007-08-30 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing square flat secondary battery |
| WO2012005153A1 (en) * | 2010-07-03 | 2012-01-12 | 株式会社Ｇｓユアサ | Battery and battery manufacturing method |
| JP2012190542A (en) * | 2011-02-21 | 2012-10-04 | Denso Corp | Wound-around battery and method and device for manufacturing the same |
| JP2015002086A (en) * | 2013-06-14 | 2015-01-05 | 株式会社Ｇｓユアサ | Power storage element, core material, and manufacturing method of power storage element |
| JP2015118917A (en) * | 2013-11-15 | 2015-06-25 | 株式会社Ｇｓユアサ | Electricity storage element and electricity storage element module |
| JP2016058224A (en) * | 2014-09-09 | 2016-04-21 | 株式会社Ｇｓユアサ | Power storage element |
| WO2022165725A1 (en) * | 2021-02-04 | 2022-08-11 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and electrode assembly manufacturing method and device |
| US11728519B2 (en) | 2020-09-17 | 2023-08-15 | Prime Planet Energy & Solutions, Inc. | Secondary battery |
| US11923512B2 (en) | 2020-09-17 | 2024-03-05 | Prime Planet Energy & Solutions, Inc. | Secondary battery and method for manufacturing secondary battery |
-
1997
- 1997-09-16 JP JP25080997A patent/JP3533903B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002280055A (en) * | 2001-03-21 | 2002-09-27 | Shin Kobe Electric Mach Co Ltd | Flat wound group manufacturing method and winding device |
| US8129048B2 (en) | 2006-02-21 | 2012-03-06 | Panasonic Corporation | Method for producing rectangular flat secondary battery |
| WO2007097172A1 (en) * | 2006-02-21 | 2007-08-30 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing square flat secondary battery |
| JP5862563B2 (en) * | 2010-07-03 | 2016-02-16 | 株式会社Ｇｓユアサ | Battery and battery manufacturing method |
| CN103004002A (en) * | 2010-07-03 | 2013-03-27 | 株式会社杰士汤浅国际 | Battery and battery manufacturing method |
| US9203057B2 (en) | 2010-07-03 | 2015-12-01 | Gs Yuasa International Ltd. | Battery and method of manufacturing battery |
| WO2012005153A1 (en) * | 2010-07-03 | 2012-01-12 | 株式会社Ｇｓユアサ | Battery and battery manufacturing method |
| JP2012190542A (en) * | 2011-02-21 | 2012-10-04 | Denso Corp | Wound-around battery and method and device for manufacturing the same |
| JP2015002086A (en) * | 2013-06-14 | 2015-01-05 | 株式会社Ｇｓユアサ | Power storage element, core material, and manufacturing method of power storage element |
| JP2015118917A (en) * | 2013-11-15 | 2015-06-25 | 株式会社Ｇｓユアサ | Electricity storage element and electricity storage element module |
| JP2016058224A (en) * | 2014-09-09 | 2016-04-21 | 株式会社Ｇｓユアサ | Power storage element |
| US11728519B2 (en) | 2020-09-17 | 2023-08-15 | Prime Planet Energy & Solutions, Inc. | Secondary battery |
| US11923512B2 (en) | 2020-09-17 | 2024-03-05 | Prime Planet Energy & Solutions, Inc. | Secondary battery and method for manufacturing secondary battery |
| WO2022165725A1 (en) * | 2021-02-04 | 2022-08-11 | 江苏时代新能源科技有限公司 | Electrode assembly, battery cell, battery, and electrode assembly manufacturing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3533903B2 (en) | 2004-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3743781B2 (en) | Nonaqueous electrolyte secondary battery | |
| KR100515571B1 (en) | Stacked electrochemical cell | |
| US8574736B2 (en) | Hybrid-typed electrode assembly of capacitor-battery structure | |
| KR100387339B1 (en) | A method of manufacturing a battery including a non-circular spiral electrode body | |
| US20060269833A1 (en) | Spirally-rolled electrodes with separator and the batteries therewith | |
| KR20050028798A (en) | Secondary battery | |
| JP4313992B2 (en) | Design method for prismatic secondary battery | |
| JPH11167930A (en) | Layered secondary battery using thin electrode | |
| JP3533903B2 (en) | Non-cylindrical battery and method of manufacturing the same | |
| JP2002050322A (en) | Sealed square flat cell | |
| JP2000348754A (en) | Rolled electrode type battery | |
| JPH1055823A (en) | Battery | |
| JP2006278184A (en) | Square battery and its manufacturing method | |
| JPH11339758A (en) | Electrode winding type battery | |
| JPH11224689A (en) | Wound lithium secondary battery and its electrode wound body | |
| JP5235317B2 (en) | Battery with pressure holder | |
| JP4145056B2 (en) | battery | |
| JPH10255818A (en) | Wound battery | |
| JP4201517B2 (en) | Nonaqueous electrolyte secondary battery | |
| JP7117623B2 (en) | Electrode body for secondary battery and secondary battery | |
| JP2011216397A (en) | Square secondary battery, and manufacturing method thereof | |
| JP2000294201A (en) | Enclosed square thin battery | |
| KR20000051740A (en) | Electrode of secondary battery | |
| JP2000106171A (en) | Battery | |
| JP2000357535A (en) | Rectangular lithium secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040217 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040301 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080319 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090319 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090319 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100319 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110319 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120319 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120319 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130319 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130319 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140319 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |