JP3490835B2 - Method of manufacturing electrode plate used for storage battery - Google Patents
Method of manufacturing electrode plate used for storage batteryInfo
- Publication number
- JP3490835B2 JP3490835B2 JP10757496A JP10757496A JP3490835B2 JP 3490835 B2 JP3490835 B2 JP 3490835B2 JP 10757496 A JP10757496 A JP 10757496A JP 10757496 A JP10757496 A JP 10757496A JP 3490835 B2 JP3490835 B2 JP 3490835B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- rolling
- thickness
- rolling roll
- filled
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、蓄電池に使用され
る極板の製造方法に関し、とくに集電体に電極合剤を付
着した充填極板をロールで圧延して極板を製造する方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an electrode plate used in a storage battery, and more particularly to a method of manufacturing an electrode plate by rolling a filled electrode plate having an electrode mixture adhering to a current collector with a roll. .
【０００２】[0002]
【従来の技術】導電性の集電体に電極合剤を充填し、こ
れをロールで圧延して極板を製造する方法において大切
なことは、充填密度を高くして極板の厚さを均一に揃え
ることである。極板の厚さが均一でない場合、たとえば
所定値よりも厚い場合には電極群を構成したときに寸法
が所定値よりも大きくなり、電池缶に挿入できないとい
う不具合が発生する。また、逆に薄い場合には充填密度
が大きくなりすぎるために、電解液の浸透性が悪くな
り、結果的に電解液量のバラツキによる電池寿命のバラ
ツキにつながるという不具合が発生する。2. Description of the Related Art A method of manufacturing an electrode plate by filling an electrically conductive current collector with an electrode mixture and rolling it with a roll is important in order to increase the packing density and increase the thickness of the electrode plate. To be uniform. When the thickness of the electrode plate is not uniform, for example, when the electrode plate is thicker than a predetermined value, the dimension becomes larger than the predetermined value when the electrode group is configured, which causes a problem that it cannot be inserted into the battery can. On the other hand, if it is thin, the packing density becomes too high, so that the permeability of the electrolytic solution deteriorates, and as a result, the battery life varies due to the variation in the amount of the electrolytic solution.
【０００３】極板を均一な厚さに圧延する技術は、たと
えば、特開平５−２１０５５号公報に記載される。この
公報に記載される方法は、集電体に、活物質とバインダ
ーを含む電極合剤を充填して充填極板とし、この充填極
板を圧延ロールの間に通過させて、一定の厚さに圧延し
ている。この公報に記載される製造方法は、極板の充填
密度を高くすると共に、厚さを均一にするために、図１
に示すように、充填極板５を、最初に大径の圧延ロール
１で圧延し、最後に小径の圧延ロール２で圧延して極板
４としている。A technique for rolling the electrode plate to a uniform thickness is described in, for example, Japanese Patent Laid-Open No. 5-21055. The method described in this publication is that a current collector is filled with an electrode mixture containing an active material and a binder to form a filled electrode plate, and the filled electrode plate is passed between rolling rolls to obtain a uniform thickness. Have been rolled into. In order to increase the packing density of the electrode plate and to make the thickness uniform, the manufacturing method described in this publication is not shown in FIG.
As shown in (1), the filled electrode plate 5 is first rolled by the large-diameter rolling roll 1 and finally rolled by the small-diameter rolling roll 2 to form the electrode plate 4.
【０００４】[0004]
【発明が解決しようとする課題】以上の公報に記載され
る方法は、最後に小径の圧延ロール２で圧延することに
より、充填密度を高くできる特長がある。ただ、この方
法は、小径の圧延ロール２の上に補助ロール３を配設
し、補助ロール３で小径の圧延ロール２を押圧する構造
とするので、製造装置が複雑になる。また、補助ロール
３を小径の圧延ロール２に接触させる状態で、小径の圧
延ロール２の隙間を調整するので、小径の圧延ロール２
の隙間調整が難しくなる欠点がある。また、補助ロール
３が、小径の圧延ロール２全体を均一な圧力で押圧でき
ないと、極板４を均一な厚さに圧延できなくなる欠点も
ある。The method described in the above publication is characterized in that the packing density can be increased by finally rolling with the rolling roll 2 having a small diameter. However, in this method, since the auxiliary roll 3 is disposed on the small-diameter rolling roll 2 and the auxiliary roll 3 presses the small-diameter rolling roll 2, the manufacturing apparatus becomes complicated. In addition, the gap between the small-diameter rolling rolls 2 is adjusted while the auxiliary roll 3 is in contact with the small-diameter rolling rolls 2.
There is a drawback that it becomes difficult to adjust the gap. In addition, if the auxiliary roll 3 cannot press the entire rolling roll 2 having a small diameter with a uniform pressure, the electrode plate 4 cannot be rolled to a uniform thickness.
【０００５】さらに、図１に示す方法で製造された極板
４は、両側が中央部分よりも薄くなって、全体を均一な
厚さに製造できない欠点もある。Further, the electrode plate 4 manufactured by the method shown in FIG. 1 has the disadvantage that both sides are thinner than the central portion, so that the entire plate cannot be manufactured to have a uniform thickness.
【０００６】本発明は、さらにこの欠点を解決すること
を目的に開発されたものである。本発明の重要な目的
は、極めて簡単な装置で、極板を均一な厚さに圧延でき
る蓄電池に使用される極板の製造方法を提供することに
ある。The present invention was developed with the object of solving this drawback. An important object of the present invention is to provide a method of manufacturing an electrode plate used for a storage battery, which can roll the electrode plate to a uniform thickness with a very simple device.
【０００７】[0007]
【課題を解決するための手段】本発明の蓄電池に使用さ
れる極板の製造方法は、活物質とバインダーを含む電極
合剤を、導電性を有する集電体に付着して充填極板５を
作製し、この充填極板５を圧延ロール６で圧延して所定
の厚さの極板とする製造方法を改良したものである。According to the method of manufacturing an electrode plate used in a storage battery of the present invention, an electrode mixture containing an active material and a binder is attached to a conductive current collector to fill the electrode plate 5. Is prepared, and the filled electrode plate 5 is rolled by a rolling roll 6 to obtain an electrode plate having a predetermined thickness, which is an improved manufacturing method.
【０００８】本発明者等は、充填極板の圧延に、直径が
４５０ｍｍもある極めて太い金属製の圧延ロールを使用
するので、充填極板を通過させる圧延ロールの隙間は均
一に保持され、この間を通過した極板は、均一な厚さに
圧延されると確信していた。しかしながら、実際に多く
の極板を試作して、その厚さを測定すると、幅方向に数
％の厚さの誤差が発生することを究明した。当初、本発
明者等は、厚さの誤差が、圧延ロールの太さの誤差にあ
ると考えて、圧延ロールを表面を正確に研磨して、外径
を高い精度で正確な寸法とした。しかしながら、いかに
高精度の圧延ロールを使用して、充填極板を圧延して
も、製作される極板の幅方向の厚さのばらつきを少なく
できなかった。本発明者等は、その原因が究明できず、
極板の幅方向の厚さの誤差を少なくすることができなか
った。ところが、充填極板の圧延に、全体を同じ太さに
する圧延ロールではなくて、部分的に太さが異なる独得
の形状の圧延ロールを使用することにより、圧延される
極板の厚さの幅方向の誤差を著しく減少させることに成
功した。Since the present inventors use an extremely thick metal rolling roll having a diameter of 450 mm for rolling the filled electrode plate, the gaps between the rolling rolls that pass through the filled electrode plate are uniformly maintained. I was convinced that the electrode plate that passed through was rolled to a uniform thickness. However, it was clarified that an error of several% in thickness occurs in the width direction when many electrode plates were actually manufactured and the thickness thereof was measured. Initially, the present inventors considered that the error in the thickness was due to the error in the thickness of the rolling roll, and accurately ground the surface of the rolling roll to make the outer diameter into a precise dimension with high accuracy. However, no matter how high the precision rolling roll is used to roll the filled electrode plate, it is not possible to reduce the variation in the thickness of the electrode plate to be manufactured in the width direction. The present inventors have been unable to determine the cause,
It was not possible to reduce the thickness error of the electrode plate in the width direction. However, for the rolling of the filled electrode plate, by using a rolling roll having a unique shape in which the thickness is partially different, instead of a rolling roll having the same thickness as a whole, the thickness of the electrode plate to be rolled is We succeeded in significantly reducing the error in the width direction.
【０００９】したがって、本発明の蓄電池に使用される
極板の製造方法は、充填極板５の圧延に、中央から両端
に向かって直線的に直径を細くし、両端の半径を中央の
半径よりも小さくして、端部が中央部分よりも次第に細
くなっている圧延ロール６を使用することを特徴とす
る。Therefore, according to the method of manufacturing the electrode plate used in the storage battery of the present invention, the rolling of the filled electrode plate 5 is performed from the center to both ends.
Toward the center of the radius of both ends
It is characterized by using a rolling roll 6 which is smaller than the radius and whose end portion is gradually thinner than the central portion.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。ただし、以下に示す実施の形態
は、本発明の技術思想を具体化するための蓄電池に使用
される極板の製造方法を例示するものであって、本発明
は極板の製造方法を下記の方法に特定しない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a method for manufacturing an electrode plate used for a storage battery for embodying the technical idea of the present invention, and the present invention describes a method for manufacturing an electrode plate as follows. No specific method.
【００１１】さらに、この明細書は、特許請求の範囲を
理解しやすいように、実施の形態に示される部材に対応
する番号を、「特許請求の範囲の欄」、および「課題を
解決するための手段の欄」に示される部材に付記してい
る。ただ、特許請求の範囲に示される部材を、実施の形
態の部材に特定するものでは決してない。Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "the claims column" and "to solve the problems. It is added to the members shown in the column of "means". However, the members shown in the claims are not limited to the members of the embodiment.
【００１２】本発明の蓄電池に使用される極板の製造方
法は、集電体に電極合剤を充填して充填極板とし、この
充填極板を圧延ロールで圧延して所定の厚さの極板を製
造する。本発明の製造方法は、製造される極板の集電体
と電極合剤を特定するものではないが、以下、集電体に
発泡ニッケル基体を、電極合剤を正極合剤を使用した実
施例を詳述する。In the method for producing the electrode plate used in the storage battery of the present invention, the current collector is filled with an electrode mixture to obtain a filled electrode plate, and the filled electrode plate is rolled with a rolling roll to give a predetermined thickness. Manufactures electrode plates. The production method of the present invention does not specify the current collector and the electrode mixture of the electrode plate to be produced, but in the following, an implementation using a foamed nickel substrate as the current collector and an electrode mixture as the positive electrode mixture An example will be described in detail.
【００１３】（実施例１）
［電極合剤である活物質スラリーを調整する工程］
下記の(1)〜(3)を混合した粉末に、(4)を添加混合して
活物質スラリーを作製する。
(1) 共沈成分として亜鉛を２．５ｗｔ％、コバルトを
１ｗｔ％含有する水酸化ニ ッケル粉末（レーザー方式
で測定した平均粒径が約１０μｍ）を９０重量部
(2) 水酸化コバルトを１０重量部
(3) 酸化亜鉛粉末を３重量部
(4) ヒドロキシプロピルセルロースの０．２ｗｔ％水
溶液を５０重量部Example 1 [Step of Preparing Active Material Slurry as Electrode Mixture] (4) is added to and mixed with the powder obtained by mixing (1) to (3) below to prepare an active material slurry. To do. (1) 90 parts by weight of nickel hydroxide powder containing 2.5 wt% of zinc and 1 wt% of cobalt as coprecipitated components (average particle size measured by laser method is about 10 μm) (2) 10 parts of cobalt hydroxide Parts by weight (3) 3 parts by weight of zinc oxide powder (4) 50 parts by weight of a 0.2 wt% aqueous solution of hydroxypropyl cellulose
【００１４】［電極合剤である活物質スラリーを集電体
に充填して充填極板を製作する工程］
得られた活物質スラリーを、幅を約５００ｍｍとする帯
状の発泡ニッケル基体である集電体に充填して乾燥す
る。発泡ニッケル基体の多孔度は９５％、厚みは約２ｍ
ｍである。活物質スラリーの充填量は、圧延後の活物質
充填密度が２．９ｇ／ｃｃとなる量とする。[Step of Filling Current Collector with Active Material Slurry as Electrode Mixture to Produce Filled Electrode] The obtained active material slurry is a strip-shaped foamed nickel substrate having a width of about 500 mm. Fill an electric body and dry. The foamed nickel substrate has a porosity of 95% and a thickness of about 2 m.
m. The filling amount of the active material slurry is such that the active material filling density after rolling becomes 2.9 g / cc.
【００１５】［充填極板を圧延する工程］
図２に示すように、充填極板５を圧延ロール６に通過さ
せて圧延する。圧延ロール６は、材質をＪＩＳのＳＵＪ
−２とし、ロールの表面から半径約１０ｍｍ程度の深度
に焼き入れしている。充填極板５を挟んで圧延する２本
の圧延ロール６は、図３に示すように、中央部分の直径
を４５０ｍｍ、全長を６００ｍｍとする。さらに、圧延
ロール６は、中央から両端に向かって直線的に直径を細
くし、両端の半径を中央の半径よりも１０μｍ小さくす
る。圧延ロール６が充填極板５を圧延する圧力を調整し
て、圧延される極板の幅方向中央部が所定の厚さになる
ように調整する。[Step of rolling the filled electrode plate] As shown in FIG. 2, the filled electrode plate 5 is passed through a rolling roll 6 for rolling. The rolling roll 6 is made of JIS SUJ
-2, and it is quenched to a depth of about 10 mm from the surface of the roll. As shown in FIG. 3, the two rolling rolls 6 that sandwich and roll the filled electrode plate 5 have a central portion having a diameter of 450 mm and a total length of 600 mm. Further, the rolling roll 6 has a diameter that linearly decreases from the center toward both ends, and the radius of both ends is smaller than the radius of the center by 10 μm. The pressure with which the rolling roll 6 rolls the filled electrode plate 5 is adjusted so that the center portion in the width direction of the electrode plate to be rolled has a predetermined thickness.
【００１６】（実施例２）
充填極板５を圧延する圧延ロール６の寸法を、図３に示
すように、中央から両端に向かって直線的に直径を細く
し、両端の半径を中央の半径よりも２０μｍ小さくする
以外、実施例１と同じようにして極板を製造する。(Embodiment 2) As shown in FIG. 3, the rolling roll 6 for rolling the filled electrode plate 5 has a diameter linearly reduced from the center to both ends, and the radius of both ends is the radius of the center. An electrode plate is manufactured in the same manner as in Example 1 except that the electrode plate is made smaller by 20 μm.
【００１７】（実施例３）
充填極板５を圧延する圧延ロール６の寸法を、図３に示
すように、中央から両端に向かって直線的に直径を細く
し、両端の半径を中央の半径よりも３０μｍ小さくする
以外、実施例１と同じようにして極板を製造する。(Embodiment 3) As shown in FIG. 3, the rolling roll 6 for rolling the filled electrode plate 5 has a diameter linearly reduced from the center toward both ends, and the radius of both ends is the radius of the center. The electrode plate is manufactured in the same manner as in Example 1 except that the electrode plate is reduced by 30 μm.
【００１８】（実施例４）
充填極板５を圧延する圧延ロール６の寸法を、図４に示
すように、両端から２００ｍｍの部分を、中央から両端
に向かって直線的に直径を細くし、両端の半径を中央の
半径よりも１０μｍ小さくする以外、実施例１と同じよ
うにして極板を製造する。(Embodiment 4) As shown in FIG. 4, the rolling roll 6 for rolling the filled electrode plate 5 has a diameter of 200 mm from both ends, which is linearly reduced from the center to both ends. An electrode plate is manufactured in the same manner as in Example 1 except that the radius at both ends is smaller than the radius at the center by 10 μm.
【００１９】（実施例５）
充填極板５を圧延する圧延ロール６の寸法を、図４に示
すように、両端から２００ｍｍの部分を、中央から両端
に向かって直線的に直径を細くし、両端の半径を中央の
半径よりも２０μｍ小さくする以外、実施例１と同じよ
うにして極板を製造する。(Embodiment 5) As shown in FIG. 4, the rolling roll 6 for rolling the filled electrode plate 5 has a diameter of 200 mm from both ends and a diameter linearly reduced from the center to both ends. An electrode plate is manufactured in the same manner as in Example 1 except that the radius at both ends is smaller than the radius at the center by 20 μm.
【００２０】（実施例６）
充填極板５を圧延する圧延ロール６の寸法を、図４に示
すように、両端から２００ｍｍの部分を、中央から両端
に向かって直線的に直径を細くし、両端の半径を中央の
半径よりも３０μｍ小さくする以外、実施例１と同じよ
うにして極板を製造する。(Embodiment 6) As shown in FIG. 4, the rolling roll 6 for rolling the filled electrode plate 5 has a diameter of 200 mm from both ends, and the diameter is linearly reduced from the center to both ends. An electrode plate is manufactured in the same manner as in Example 1 except that the radius at both ends is smaller than the radius at the center by 30 μm.
【００２１】（比較例）
図５に示すように、充填極板５を圧延する圧延ロール６
の寸法を、全体の直径を４５０ｍｍとする以外、実施例
１と同じようにして極板を製造する。(Comparative Example) As shown in FIG. 5, a rolling roll 6 for rolling the filled electrode plate 5
An electrode plate is manufactured in the same manner as in Example 1 except that the overall diameter is 450 mm.
【００２２】以上のようにして製作された極板の厚さ
を、圧延ロールの軸方向に５０ｍｍ間隔で測定すると、
その最大値、最小値、平均値、標準偏差は下記の表１の
ようになった。When the thickness of the electrode plate manufactured as described above is measured at intervals of 50 mm in the axial direction of the rolling roll,
The maximum value, minimum value, average value and standard deviation are shown in Table 1 below.
【００２３】[0023]
【表１】 [Table 1]
【００２４】この表に示すように、本発明の実施例１〜
６の方法で製造された極板は、厚さのばらつきを示す標
準偏差が、０．０００８〜０．００４６と極めて少な
い。これに対して比較例の方法で製造した極板の標準偏
差は０．０１０４と大きくなった。実施例２の方法で製
作された極板は、標準偏差が０．０００８と、比較例に
比べて１／１０以下に極減した。As shown in this table, Examples 1 to 1 of the present invention
The electrode plate manufactured by the method No. 6 has a very small standard deviation of 0.0008 to 0.0046 indicating the variation in thickness. On the other hand, the standard deviation of the electrode plate manufactured by the method of the comparative example was as large as 0.0104. The standard deviation of the electrode plate manufactured by the method of Example 2 was 0.0008, which was 1/10 or less of that of the comparative example.
【００２５】さらに、比較例の極板は、最大厚さと最小
厚さの差が全体の厚さの約５％あったが、本発明の実施
例１〜６で製作された極板は、厚さの差が２％以下、と
くに、実施例２で製作された極板は、０．５％と、比較
例の１／１０に極減した。Further, in the electrode plates of the comparative examples, the difference between the maximum thickness and the minimum thickness was about 5% of the total thickness, but the electrode plates manufactured in Examples 1 to 6 of the present invention were thick. The difference in thickness was 2% or less, and particularly the electrode plate manufactured in Example 2 was 0.5%, which was 1/10 of the comparative example.
【００２６】さらに、実施例１〜６で製作された極板の
厚さを、圧延ロールの軸方向に２５ｍｍ間隔で測定した
値をグラフにすると、図６と図７に示すようになった。
これ等の図からも明らかなように、比較例の方法で製造
された極板は、中央部分が厚く、両端部分で薄くなって
いるが、本発明の実施例の方法で製作した極板は、中央
部分と両端部分の厚さの誤差が極めて少なく、全体的に
厚さのむらが少なくなった。Further, the thicknesses of the electrode plates manufactured in Examples 1 to 6 were measured at 25 mm intervals in the axial direction of the rolling roll, and the results are shown in graphs in FIGS. 6 and 7.
As is clear from these figures, the electrode plate manufactured by the method of the comparative example is thick in the central portion and thin at both end portions, but the electrode plate manufactured by the method of the example of the present invention is The thickness error between the central portion and both end portions was extremely small, and the thickness unevenness was reduced as a whole.
【００２７】本発明の蓄電池に使用される極板の製造方
法は、製造される極板の材質等を考慮して圧延ロールの
太さ、とくに、両端部分の太さを調整して、極板の幅方
向の厚さの誤差を最小にする。圧延ロールの両端部分の
太さを、中心部分に比較してどの程度細くするかは、全
体の直径を同じとする圧延ロールで極板を試作し、その
極板の幅方向の厚さを測定して容易に推測できる。The method of manufacturing the electrode plate used in the storage battery of the present invention is a method for adjusting the thickness of the rolling roll, particularly the thickness of both ends, in consideration of the material of the electrode plate to be manufactured. The thickness error in the width direction of is minimized. To determine how thin the thickness of both ends of the rolling roll is compared to the central part, prototype a plate with a rolling roll that has the same overall diameter and measure the thickness of the plate in the width direction. Then you can easily guess.
【００２８】たとえば、比較例で試作された極板は、中
心部分に比較して、両側の厚さが約３３μｍ薄くなる。
この厚さの誤差を補正するためには、図８に示すよう
に、充填極板の両端を押圧する圧延ロールの直径を約３
３μｍ、すなわち半径を３３／２μｍ小さくする。いい
かえると、圧延後に厚くなる極板の中央を押圧する、圧
延ロールの中央部分の間隔を狭くし、極板が薄くなる圧
延ロールの両端部で隙間を広くする。図８の圧延ロール
６は、全長が６００ｍｍである。この圧延ロール６で、
幅を５００ｍｍとする充填極板５を圧延する。したがっ
て、圧延ロール６は、中心から２５０ｍｍの位置で極板
の両端縁を圧延する。この部分の半径を中心よりも３３
／２μｍ細くするので、中心から３００ｍｍ離れた圧延
ロール６の両端では約２０μｍ細くすればよいことにな
る。For example, the electrode plate prototyped in the comparative example has a thickness of about 33 μm thinner on both sides as compared with the central portion.
In order to correct this thickness error, as shown in FIG. 8, the diameter of the rolling roll that presses both ends of the filled electrode plate is set to about 3 mm.
3 μm, that is, the radius is reduced by 33/2 μm. In other words, pressing the center of the electrode plate, which becomes thicker after rolling, narrows the gap between the central portions of the rolling rolls, and widens the gap at both ends of the rolling roll, where the electrode plate becomes thinner. The rolling roll 6 of FIG. 8 has a total length of 600 mm. With this rolling roll 6,
The filled electrode plate 5 having a width of 500 mm is rolled. Therefore, the rolling roll 6 rolls both end edges of the electrode plate at a position 250 mm from the center. The radius of this part is 33
Since the thickness is reduced to / 2 μm, it is necessary to reduce the thickness to about 20 μm at both ends of the rolling roll 6 which is 300 mm away from the center.
【００２９】実施例２は、圧延ロール６両端の半径を約
２０μｍ細くして、極板の厚さの誤差を最小にできるこ
とを示している。したがって、全体を同じ太さにする圧
延ロールで充填極板を圧延して極板とし、この極板の中
央部分の厚さと両端部の厚さを測定して、理想的な状態
で圧延できる圧延ロールの寸法が容易に推測できる。Example 2 shows that the radius of both ends of the rolling roll 6 can be reduced by about 20 μm to minimize the error in the thickness of the electrode plate. Therefore, the filled electrode plate is rolled with a rolling roll that makes the entire thickness the same to form an electrode plate, and the thickness of the center part and both end parts of this electrode plate is measured, and it can be rolled in an ideal state. The size of the roll can be easily estimated.
【００３０】以上の実施例は、図３と図４に示すよう
に、充填極板５を圧延する２本の圧延ロール６に同じ形
状のものを使用する実施例を示す。ただ、本発明の蓄電
池に使用される極板の製造方法は、図９に示すように、
充填極板５を圧延する片方の圧延ロール６は全体を同じ
太さとし、他方の圧延ロール６には、両端部を中心部分
より細くしているテーパーロールを使用することもでき
る。この図に示すようにして、充填極板を圧延する方法
は、テーパーロールの両端の半径を細くする程度を、図
３と図４に示すように、同じ形状の圧延ロールを使用す
るものに比較して、２倍（４０μｍ）とする。As shown in FIGS. 3 and 4, the above embodiment shows an embodiment in which two rolling rolls 6 for rolling the filled electrode plate 5 have the same shape. However, as shown in FIG. 9, the manufacturing method of the electrode plate used for the storage battery of the present invention is as follows.
One rolling roll 6 for rolling the filled electrode plate 5 may have the same thickness as a whole, and the other rolling roll 6 may be a taper roll having both ends thinner than the central portion. As shown in this figure, the method of rolling the filled electrode plate is such that the radius of the both ends of the taper roll is reduced as compared with the one using the rolls of the same shape as shown in FIGS. 3 and 4. To double (40 μm).
【００３１】[0031]
【００３２】[0032]
【発明の効果】本発明の蓄電池に使用される極板の製造
方法は、圧延ロールに独得の形状のものを使用する方法
で、それも、端部を多少細くした圧延ロールを使用する
という極めて簡単な方法で、製造される極板の厚さのば
らつきを著しく少なくできる卓効を実現する。このよう
にして、極板の厚さを均一にできる本発明の製造方法
は、従来の製造方法や装置をほとんど変更することな
く、圧延ロールを独得の形状のものに変更して、極めて
均一な厚さの極板を製造できる。このため、高品質な極
板を安価に多量生産できる特長が実現できる。また、本
発明の極板の製造方法は、極板の幅方向の厚さを均一に
できるので、幅の広い極板を連続して製造し、これを切
断して蓄電池に組み立てることにより、より能率よく高
品質な極板を製造できる特長を実現する。The method for producing the electrode plate used in the storage battery of the present invention is a method of using a unique shape of the rolling roll, which also uses a rolling roll having a slightly thin end. With a simple method, it is possible to significantly reduce the variation in the thickness of the electrode plate that is manufactured. In this way, the manufacturing method of the present invention, which can make the thickness of the electrode plate uniform, changes the rolling roll into a unique shape with almost no change in the conventional manufacturing method and apparatus, and is extremely uniform. A thick plate can be manufactured. Therefore, it is possible to realize the feature that high-quality electrode plates can be mass-produced at low cost. Further, since the electrode plate manufacturing method of the present invention can make the thickness of the electrode plate in the width direction uniform, a wide electrode plate is continuously manufactured, and the electrode plate is cut and assembled into a storage battery, Achieve the features that enable efficient and high-quality production of electrode plates.
【図１】従来の方法で圧延して極板を製造する方法を示
す側面図FIG. 1 is a side view showing a method for manufacturing an electrode plate by rolling according to a conventional method.
【図２】本発明の実施の形態の方法で充填極板を圧延ロ
ールで圧延する状態を示す斜視図FIG. 2 is a perspective view showing a state where the filled electrode plate is rolled by a rolling roll according to the method of the embodiment of the present invention.
【図３】実施例１〜３の方法で充填極板を圧延する圧延
ロールを示す断面図FIG. 3 is a cross-sectional view showing a rolling roll that rolls a filled electrode plate by the method of Examples 1 to 3.
【図４】実施例４〜６の方法で充填極板を圧延する圧延
ロールを示す断面図FIG. 4 is a cross-sectional view showing a rolling roll that rolls a filled electrode plate by the method of Examples 4 to 6.
【図５】圧延ロールが充填極板を圧延する従来の方法を
示す断面図FIG. 5 is a sectional view showing a conventional method in which a rolling roll rolls a filled electrode plate.
【図６】実施例１〜３、及び比較例の方法で製造された
極板の幅方向の厚さの誤差を示すグラフFIG. 6 is a graph showing the thickness error in the width direction of the electrode plates manufactured by the methods of Examples 1 to 3 and Comparative Example.
【図７】実施例４〜６、及び比較例の方法で製造された
極板の幅方向の厚さの誤差を示すグラフFIG. 7 is a graph showing an error in thickness in the width direction of electrode plates manufactured by the methods of Examples 4 to 6 and Comparative Example.
【図８】本発明の実施例の方法に使用する圧延ロールで
あって端部を細くする寸法を示す断面図FIG. 8 is a cross-sectional view showing a rolling roll used in the method of the embodiment of the present invention and showing dimensions for narrowing the end portion.
【図９】本発明の他の実施例に使用する圧延ロールの断
面図 FIG. 9: Cutting of a rolling roll used in another embodiment of the present invention
Plan
１…大径の圧延ロール ２…小径の圧延ロール ３…補助ロール ４…極板 ５…充填極板 ６…圧延ロール 1 ... Large diameter rolling roll 2 ... Small diameter rolling roll 3 ... Auxiliary roll 4 ... Pole plate 5: Filled electrode plate 6 ... Rolling roll
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大下 和彦 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 (56)参考文献 特開 平５−21055（ＪＰ，Ａ) 特開 平６−71310（ＪＰ，Ａ) 特開 平４−105702（ＪＰ，Ａ) 特開 平７−65816（ＪＰ，Ａ) 実開 平２−32302（ＪＰ，Ｕ) 実開 昭59−135805（ＪＰ，Ｕ) 実開 昭58−81504（ＪＰ，Ｕ) 実開 昭57−17309（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 4/02 - 4/04 H01M 10/02 - 10/40 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuhiko Oshita 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) Reference JP-A-5-21055 (JP, A) Kaihei 6-71310 (JP, A) JP 4-105702 (JP, A) JP 7-65816 (JP, A) Actual opening 2-32302 (JP, U) Actual opening Sho 59-135805 ( JP, U) Actual development 58-81504 (JP, U) Actual development 57-17309 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H01M 4/02-4/04 H01M 10/02-10/40
Claims (3)
導電性を有する集電体に付着して充填極板(5)を作製
し、この充填極板(5)を圧延ロール(6)で圧延して所定の
厚さの極板(7)とする蓄電池に使用される極板の製造方
法において、 充填極板(5)の圧延に、中央から両端に向かって直線的
に直径を細くし、両端の半径を中央の半径よりも小さく
して、端部が中央部分よりも次第に細くなっている圧延
ロール(6)を使用することを特徴とする蓄電池に使用さ
れる極板の製造方法。1. An electrode mixture containing an active material and a binder,
A filled electrode plate (5) is prepared by adhering to a current collector having conductivity, and the filled electrode plate (5) is rolled by a rolling roll (6) to form an electrode plate (7) having a predetermined thickness. In the method of manufacturing the electrode plates used for storage batteries, when rolling the filled electrode plates (5), straight lines were applied from the center to both ends.
The diameter at both ends and the radius at both ends is smaller than the radius at the center
Then, the method for producing an electrode plate used in a storage battery is characterized in that a rolling roll (6) whose end portion is gradually thinner than the central portion is used.
ル (6) に同じ形状のものを使用する請求項１に記載され
る極板の製造方法。 2. Two rolling rolls for rolling the filled electrode plate (5).
The method according to claim 1, wherein the same shape is used for the rule (6).
Manufacturing method of electrode plate.
ル (6) は全体を同じ太さとし、他方の圧延ロール (6) に
は、両端部を中心部分より細くしているテーパーロール
を使用する請求項１に記載される極板の製造方法。 3. One rolling roll for rolling the filled electrode plate (5)
Le (6) is the same thickness Satoshi whole, on the other rolling roll (6)
Is a taper roll with both ends thinner than the center
The method for manufacturing an electrode plate according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10757496A JP3490835B2 (en) | 1996-04-26 | 1996-04-26 | Method of manufacturing electrode plate used for storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10757496A JP3490835B2 (en) | 1996-04-26 | 1996-04-26 | Method of manufacturing electrode plate used for storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09293500A JPH09293500A (en) | 1997-11-11 |
| JP3490835B2 true JP3490835B2 (en) | 2004-01-26 |
Family
ID=14462632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10757496A Expired - Fee Related JP3490835B2 (en) | 1996-04-26 | 1996-04-26 | Method of manufacturing electrode plate used for storage battery |
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| Country | Link |
|---|---|
| JP (1) | JP3490835B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3591169B2 (en) * | 1996-07-10 | 2004-11-17 | 宇部興産株式会社 | Battery electrode and battery using the same |
| JP4746272B2 (en) * | 2004-02-04 | 2011-08-10 | 株式会社東芝 | Nonaqueous electrolyte secondary battery |
| CN100449824C (en) * | 2005-10-24 | 2009-01-07 | 比亚迪股份有限公司 | Battery pole piece and manufacturing method of lithium ion secordary battery containing the pole piece |
| CN102324496A (en) * | 2011-09-19 | 2012-01-18 | 江苏乐能电池股份有限公司 | Tabletting method for lithium ion battery positive plate |
| JP6838442B2 (en) * | 2017-03-17 | 2021-03-03 | 三洋電機株式会社 | Electrode plate manufacturing method and secondary battery manufacturing method |
-
1996
- 1996-04-26 JP JP10757496A patent/JP3490835B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09293500A (en) | 1997-11-11 |
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