JPH04249857A - Manufacture of battery electrode plate - Google Patents
Manufacture of battery electrode plateInfo
- Publication number
- JPH04249857A JPH04249857A JP2418466A JP41846690A JPH04249857A JP H04249857 A JPH04249857 A JP H04249857A JP 2418466 A JP2418466 A JP 2418466A JP 41846690 A JP41846690 A JP 41846690A JP H04249857 A JPH04249857 A JP H04249857A
- Authority
- JP
- Japan
- Prior art keywords
- mixture
- conductive core
- mixture sheet
- roller
- sheet
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 123
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 239000011149 active material Substances 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003273 ketjen black Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、導電芯体の両面に合剤
シートを積層する電池用極板の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a battery electrode plate in which a mixture sheet is laminated on both sides of a conductive core.
【０００２】0002
【従来の技術】導電芯体の両面に合剤シートを積層した
電池用極板は、次のようにして製造される。電極活物質
合剤の粉末にＰＴＦＥディスパージョンを添加して混合
する。その後、最適な粒度に粉砕した合剤を、ローラで
加圧して合剤シートとする。合剤シートを、格子状の導
電芯体の両面に積層する。導電芯体と合剤シートとをサ
ンドイッチ状にした積層体をローラで加圧し、合剤シー
トを導電芯体に圧着して電池用極板とする。BACKGROUND OF THE INVENTION A battery electrode plate having mixture sheets laminated on both sides of a conductive core is manufactured as follows. The PTFE dispersion is added to the powder of the electrode active material mixture and mixed. Thereafter, the mixture pulverized to the optimum particle size is pressed with a roller to form a mixture sheet. The mixture sheet is laminated on both sides of a lattice-shaped conductive core. A laminate in which the conductive core and the mixture sheet are sandwiched is pressed with a roller, and the mixture sheet is pressed onto the conductive core to form a battery plate.
【０００３】特開昭５７−４６４７１号公報には、この
方法で電池用極板を製造する方法が記載されている。こ
の公報に記載される方法は、陽極合剤を連続的に成形し
て予備シートとする。予備シートを乾燥した後、導電芯
体の両面に積層する。積層された予備シートを、圧延ロ
ーラで薄く圧延し、圧着ローラで導電芯体に圧着してい
る。この方法は、電池用極板の密度を高くして高電気容
量を実現するために、圧着ローラの周速を、圧延ローラ
の周速よりも速くしている。[0003] Japanese Patent Application Laid-open No. 57-46471 describes a method for manufacturing battery plates using this method. In the method described in this publication, an anode mixture is continuously formed into a preliminary sheet. After drying the preliminary sheet, it is laminated on both sides of the conductive core. The laminated preliminary sheets are rolled into a thin layer using a rolling roller, and then pressed onto a conductive core using a pressure roller. In this method, the circumferential speed of the pressure roller is made faster than the circumferential speed of the rolling roller in order to increase the density of the battery electrode plate and achieve high electric capacity.
【０００４】さらに、特開昭６０−２８１６７号公報、
特開昭５９−１９６５６５号公報、および特開昭６０−
１００３６７号公報にも、活物質混合物を、導電芯体で
ある導電性の多孔体に付着する方法が記載されている。
この方法は、容量密度を高くするために、下記の方法で
電池用極板を製造している。活物質混合物を導電芯体に
積層する。積層体を、表面に凹凸のあるローラで繰り返
し加圧する。その後、表面の平滑なローラで加圧する。
また、この方法とは逆に、活物質混合物を積層した導電
芯体を、最初に平滑なローラで加圧し、その後、凹凸の
あるローラで加圧している。Furthermore, Japanese Patent Application Laid-Open No. 60-28167,
JP-A-59-196565 and JP-A-60-
No. 100367 also describes a method of attaching an active material mixture to a conductive porous body that is a conductive core. In this method, battery electrode plates are manufactured by the following method in order to increase the capacity density. The active material mixture is laminated onto the conductive core. The laminate is repeatedly pressed with a roller having an uneven surface. After that, pressure is applied using a roller with a smooth surface. Further, in contrast to this method, the conductive core on which the active material mixture is laminated is first pressed with a smooth roller, and then with a roller with unevenness.
【０００５】さらにまた、特開昭６３−１４８５４２号
公報は、均一膜を形成するために、３本のローラを使用
して、合剤シートを導電芯体の片面に接着する方法が記
載されている。この公報に記載される方法は、合剤供給
ローラと造膜ローラとで活物質混合物を合剤シートとす
る。合剤シートを導電芯体の上に積層し、この積層体を
、造膜ローラと充填ローラとで加圧して、合剤シートを
導電芯体に圧着する。この製法は、均一膜とするために
、合剤供給ローラの表面を、造膜ローラよりも粗くして
いる。この方法は、導電芯体の片面に合剤シートを圧着
できる。Furthermore, Japanese Patent Application Laid-Open No. 63-148542 describes a method of bonding a mixture sheet to one side of a conductive core using three rollers in order to form a uniform film. There is. In the method described in this publication, an active material mixture is formed into a mixture sheet using a mixture supply roller and a film forming roller. The mixture sheet is laminated on the conductive core, and this laminate is pressed by a membrane forming roller and a filling roller to press the mixture sheet onto the conductive core. In this manufacturing method, the surface of the mixture supply roller is made rougher than that of the film forming roller in order to form a uniform film. With this method, a mixture sheet can be pressure-bonded to one side of a conductive core.
【０００６】[0006]
【発明が解決しようとする問題点】これ等の公報に記載
される従来の電池用極板の製造方法は、導電芯体に合剤
シートを充填するときに、合剤シートが切れ易い欠点が
ある。それは、合剤シートの表面を、ローラが線状に加
圧して圧延するからである。線状に加圧された合剤シー
トは、押圧部分において水平方法に移動して圧力を逃が
す状態となる。すなわち、ローラが合剤シートを局部的
に押圧すると、押圧部分の合剤シートが押圧されない部
分に移動してしまう。押圧力を強くすると、合剤シート
の移動量は多くなる。合剤シートの水平方法の移動は、
合剤シートを高密度に導電芯体に充填するのを阻害する
。それは、合剤シートが横に逃げると、ローラで加圧さ
れる圧力が低下して、導電芯体の空隙に押し込まれなく
なるからである。[Problems to be Solved by the Invention] The conventional manufacturing methods for battery plates described in these publications have the disadvantage that the mixture sheet is easily cut when filling the conductive core with the mixture sheet. be. This is because the roller presses and rolls the surface of the mixture sheet linearly. The linearly pressurized mixture sheet moves horizontally at the pressed portion to release the pressure. That is, when the roller locally presses the mixture sheet, the mixture sheet in the pressed area moves to the unpressed area. When the pressing force is increased, the amount of movement of the mixture sheet increases. To move the mixture sheet horizontally,
This prevents the conductive core from being densely packed with the mixture sheet. This is because when the mixture sheet escapes laterally, the pressure applied by the roller decreases, and it is no longer pushed into the gap in the conductive core.
【０００７】ローラが合剤シートを押圧する圧力を強く
して、合剤シートを高密度に導電芯体に充填できる。し
かしながら、ローラの圧力を著しく高くすることは不可
能である。それは、合剤シートが切れて連続的に製造出
来なくなるからである。[0007] By increasing the pressure with which the roller presses the mixture sheet, the conductive core can be filled with the mixture sheet at high density. However, it is not possible to increase the roller pressure significantly. This is because the mixture sheet breaks and cannot be manufactured continuously.
【０００８】困ったことに、導電芯体には、合剤シート
を密に充填できるように、多孔板や網材が使用される。
この形状の導電芯体は、均一な厚さの板材に比較すると
、ローラで押圧されたときの合剤シートの切断を助長す
る。それは、この形状の導電芯体に合剤シートが押圧さ
れると、合剤シートは部分的に極めて薄くなって切れ易
くなる。この為、従来の方法は、導電芯体に高密度に合
剤シートを充填することと、合剤シートの切れを解消す
ることとは、互いに相反する特性であって、両特性を満
足することができない。[0008] Unfortunately, a perforated plate or a mesh material is used for the conductive core so that the mixture sheet can be densely filled. This shape of the conductive core facilitates cutting of the mixture sheet when pressed by a roller, compared to a plate material of uniform thickness. This is because when the mixture sheet is pressed against the conductive core having this shape, the mixture sheet partially becomes extremely thin and easily breaks. For this reason, in the conventional method, filling the conductive core with the mixture sheet at high density and eliminating the breakage of the mixture sheet are mutually contradictory characteristics, and it is necessary to satisfy both characteristics. I can't.
【０００９】さらにまた、従来の方法は、合剤シートを
ローラで加圧して圧延するので、製造された電池用極板
が蛇行し易い欠点もある。蛇行した電池用極板は、電池
の容積密度を低下させて、容量を減少させる。Furthermore, in the conventional method, the mixture sheet is pressed and rolled with rollers, so that the manufactured battery electrode plate tends to meander. Serpentine battery plates reduce the volumetric density of the battery, reducing its capacity.
【００１０】この発明は、これら従来の電池用極板の欠
点を解決することを目的に開発されたものである。した
がって、この発明の重要な目的は、製造過程における合
剤シートの切断を極減できる電池用極板の製造方法を提
供するにある。また、この発明の他の重要な目的は、製
造過程における電池用極板の蛇行を極減できる電池用極
板の製造方法を提供するにある。さらにまた、この発明
の他の重要な目的は、フープ状の電池用極板を連続して
能率よく生産できる電池用極板の製造方法を提供するに
ある。[0010] The present invention was developed with the aim of solving the drawbacks of these conventional battery plates. Therefore, an important object of the present invention is to provide a method for manufacturing a battery electrode plate that can minimize cutting of the mixture sheet during the manufacturing process. Another important object of the present invention is to provide a method of manufacturing a battery plate that can minimize meandering of the battery plate during the manufacturing process. Furthermore, another important object of the present invention is to provide a method for manufacturing a battery electrode plate that can continuously and efficiently produce hoop-shaped battery electrode plates.
【００１１】[0011]
【問題点を解決する為の手段】この発明の電池用極板の
製造方法は、前述の目的を達成するために、下記の工程
で、電池用極板を製造する。
■ 活物質と結着剤とを混合して活物質混合物を得る
第１工程
■ 活物質混合物をローラ加工して合剤シート１を作
製する第２工程
■ 合剤シート１を、帯状の導電芯体２の両面に供給
し、合剤シート１が積層された導電芯体２の両面を平面
的にプレス加圧して帯状極板３を作製する第３工程■
帯状極板３をローラ加圧して圧延する第４工程■
帯状極板３を切断して電極とする第５工程とからなるこ
とを特徴とするものである。[Means for Solving the Problems] In order to achieve the above-mentioned object, the method for manufacturing a battery electrode plate of the present invention involves manufacturing a battery electrode plate through the following steps. ■ The first step of mixing the active material and the binder to obtain an active material mixture ■ The second step of rolling the active material mixture to produce the mixture sheet 1 ■ The mixture sheet 1 is rolled into a strip-shaped conductive core. A third step (2) in which the conductive core 2 on which the mixture sheet 1 is laminated is applied to both sides of the conductive core 2 and pressed flatly to produce the strip-shaped electrode plate 3.
Fourth step of rolling the strip-shaped electrode plate 3 by applying roller pressure■
This method is characterized by comprising a fifth step of cutting the strip-shaped electrode plate 3 into electrodes.
【００１２】すなわち、この発明の方法は、電池用極板
の蛇行を防止するために、合剤シート１と導電芯体２と
のサンドイッチ状積層体を、従来のように、直ちにロー
ラ加工することなく、プレス機４で平面的に押圧する。
平面的なプレスは、ローラのように線状に合剤シートを
加圧しない。平面的な押圧面を上下方向に押圧して、合
剤シート１と導電芯体２とを挟着して密着する。そして
、プレス加圧の後にローラ加圧するので、むらなく連続
的に帯状極板を供給できる。That is, in the method of the present invention, in order to prevent meandering of the battery electrode plates, the sandwich-like laminate of the mixture sheet 1 and the conductive core 2 is immediately subjected to roller processing as in the conventional method. Instead, it is pressed flat with the press 4. A flat press does not press the mixture sheet linearly like a roller. The planar pressing surface is pressed in the vertical direction to sandwich the mixture sheet 1 and the conductive core 2 in close contact with each other. Since roller pressure is applied after press pressure, it is possible to supply the strip-shaped electrode plates evenly and continuously.
【００１３】[0013]
【実施例】本発明の電池用極板の製造方法は、合剤シー
トをプレス機で加圧して導電芯体に充填している。電池
用極板は次の工程で製造される。活物質混合物をホット
ローラ５で加圧して合剤シート１とする。合剤シート１
を、ベルトコンベア６と導電芯体２の上に載せる。この
状態で、導電芯体２の両面に合剤シート１を積層する。
ベルトコンベア６と導電芯体２とに載せられて移送され
る合剤シート１は、直接に引張力が作用しないので、途
中で切断することなく移動される。導電芯体２と合剤シ
ート１のサンドイッチ状積層体は乾燥機７に搬入される
。乾燥機７の内部温度は約１５０℃に設定され、合剤シ
ート１を水分値３％以下に乾燥する。乾燥機７から排出
された積層体は、プレス機４に押圧される。この工程で
、合剤シート１は導電芯体２の隙間に高密度に充填され
て結合される。[Example] In the method of manufacturing a battery plate according to the present invention, a mixture sheet is pressed with a press and filled into a conductive core. Battery plates are manufactured through the following steps. The active material mixture is pressed with a hot roller 5 to form a mixture sheet 1. Mixture sheet 1
is placed on the belt conveyor 6 and the conductive core 2. In this state, the mixture sheet 1 is laminated on both sides of the conductive core 2. The mixture sheet 1 carried on the belt conveyor 6 and the conductive core 2 is not directly subjected to tensile force, and therefore is moved without being cut on the way. The sandwich-like laminate of the conductive core 2 and the mixture sheet 1 is carried into a dryer 7. The internal temperature of the dryer 7 is set to about 150° C., and the mixture sheet 1 is dried to a moisture content of 3% or less. The laminate discharged from the dryer 7 is pressed by the press 4. In this step, the mixture sheet 1 is densely packed into the gap between the conductive cores 2 and bonded.
【００１４】従来の方法は、この工程で積層体をローラ
で加圧して合剤シートを導電芯体に充填していた。ロー
ラは、合剤シートを線状に加圧するので、せん断力が作
用する。このため、ローラで加圧された電池用極板は、
伸び率が大きくなり、密度を高く充填することができな
い。In the conventional method, the conductive core was filled with the mixture sheet by pressing the laminate with a roller in this step. Since the roller presses the mixture sheet in a linear manner, shearing force is applied. For this reason, battery plates pressurized by rollers are
The elongation rate increases, making it impossible to fill with high density.
【００１５】これに対して、この発明の製法は、ローラ
加圧に代わって、プレス機４の平滑面で合剤シート１を
両面で加圧し、その後で、ローラ加圧している。すなわ
ち、この発明の方法は、線ではなく、平面的に加圧して
合剤シート１を導電芯体２に充填する。平面で加圧され
る合剤シート１は、ローラのようにせん断力が作用しな
い。このため、導電芯体２の伸び率を小さくして、合剤
シート１を導電芯体２に高い密度に充填できる。さらに
、合剤シート１を平面的に加圧して導電芯体２に充填す
る。この状態で加圧される合剤シート１は、水平方向の
移動が極めて少なく、導電芯体２に高密度に充填される
。さらにまた、平面的に加圧されるので、プレスされた
電池用極板を完全な平面状とし、たるみの発生を阻止で
きる。又、フープ状の極板を製造しても蛇行することが
ない。On the other hand, in the manufacturing method of the present invention, instead of applying roller pressure, the mixture sheet 1 is pressed on both sides with the smooth surface of the press 4, and then roller pressure is applied. That is, in the method of the present invention, the conductive core 2 is filled with the mixture sheet 1 by applying pressure in a plane, not in a line. Unlike rollers, shearing force does not act on the mixture sheet 1 that is pressed flat. Therefore, the elongation rate of the conductive core 2 can be reduced and the mixture sheet 1 can be filled into the conductive core 2 with high density. Furthermore, the mixture sheet 1 is pressed flatly and filled into the conductive core 2. The mixture sheet 1 pressurized in this state moves very little in the horizontal direction, and is densely packed into the conductive core 2. Furthermore, since pressure is applied in a flat manner, the pressed battery electrode plate can be made completely flat and sagging can be prevented. Furthermore, even if a hoop-shaped electrode plate is manufactured, it will not meander.
【００１６】以下、この発明の実施例を製造装置を示す
図面に基づいて説明する。但し、以下に示す実施例は、
この発明の技術思想を具体化する為の製法を例示すもの
であって、この発明の方法は、製造条件、原料の材質や
添加量、あるいは、製造装置を下記のものに特定するも
のでない。この発明の電池用極板の製造方法は、特許請
求の範囲に記載された範囲に基づいて種々の変更を加え
ることができる。さらに、この明細書は、特許請求の範
囲が理解し易いように、実施例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「問題点を
解決する為の手段の欄」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、実施例の部
材に特定するものでは決してない。Embodiments of the present invention will be described below with reference to drawings showing manufacturing equipment. However, in the examples shown below,
This is an example of a manufacturing method for embodying the technical idea of this invention, and the method of this invention does not specify the manufacturing conditions, materials and amounts of raw materials added, or manufacturing equipment as described below. Various changes can be made to the method for manufacturing a battery electrode plate of the present invention within the scope of the claims. Furthermore, in order to make the claims easier to understand, the numbers corresponding to the members shown in the examples are given in the "Claims column" and "Means for solving the problem". It is added to the members shown in the "Column". However, the members shown in the claims are by no means limited to the members of the embodiments.
【００１７】活物質混合物として、二酸化マンガン１０
０重量部と、グラファイト６重量部と、ケッチェンブラ
ック４重量部とを混合する。ケッチェンブラックは、ポ
リペトラフルオロエチレン（ＰＴＦＥ）のフィルブリル
化を促進させるために添加する。さらに、この混合粉末
に、ＰＴＦＥの分散液を５重量部（但し、固形分量とし
ては３重量部）と、水とを添加する。水の添加量は、水
分含有量を２３％に調整する。Manganese dioxide 10 as active material mixture
0 parts by weight, 6 parts by weight of graphite, and 4 parts by weight of Ketjen black. Ketjenblack is added to promote fibrillation of polypetrafluoroethylene (PTFE). Further, 5 parts by weight of a PTFE dispersion (3 parts by weight as solid content) and water are added to this mixed powder. The amount of water added is adjusted to a water content of 23%.
【００１８】さらに混合して、湿潤状態（フェニキュラ
ー状態）とし、平均粒径が０．５〜１ｍｍである粒状に
粉砕造粒して活物質混合物とする。この活物質混合物は
、粒径が０．１〜２ｍｍである粒子を含んでいた。[0018] The mixture is further mixed to bring it into a wet state (fennicular state), and then pulverized and granulated into particles having an average particle size of 0.5 to 1 mm to obtain an active material mixture. This active material mixture contained particles with a particle size of 0.1-2 mm.
【００１９】図１に示す装置を使用して、活物質混合物
を合剤シート１に成形する。この図に示す装置は、ふた
つのホッパー８の下端出口に、２組のホットローラ５Ａ
、５Ｂを設ている。この装置は、ホットローラを１００
℃に加熱し、加熱されたホットローラ５Ａと５Ｂとで、
ホッパー８に供給された活物質混合物を、０．３ｍｍ厚
の合剤シート１とする。Using the apparatus shown in FIG. 1, the active material mixture is formed into a mixture sheet 1. The device shown in this figure has two sets of hot rollers 5A installed at the lower end exits of the two hoppers 8.
, 5B has been established. This device can handle 100 hot rollers.
℃ and heated hot rollers 5A and 5B,
The active material mixture supplied to the hopper 8 is made into a mixture sheet 1 having a thickness of 0.3 mm.
【００２０】ホットローラ５Ａで成形された下側の合剤
シート１は、ベルトコンベア６に載せて搬送する。ホッ
トローラ５Ｂで成形した上側の合剤シート１は、導電芯
体２に載せて移送する。導電芯体２には、材料厚みが０
．１ｍｍ、立体厚みが０．３ｍｍ、幅２０ｃｍのフープ
状ステンレスエキスパンダメタル（ヘックス形ＬＷ＝１
．５ｍｍ、ＳＷ＝１．２ｍｍ）を使用する。この状態で
、導電芯体２の両面に合剤シート１が配設された３層の
サンドイッチ構造となる。The lower mixture sheet 1 formed by the hot roller 5A is placed on a belt conveyor 6 and conveyed. The upper mixture sheet 1 formed by the hot roller 5B is placed on the conductive core 2 and transported. The conductive core 2 has a material thickness of 0.
．． Hoop-shaped stainless steel expander metal with a thickness of 1 mm, a three-dimensional thickness of 0.3 mm, and a width of 20 cm (hex shape LW = 1
．． 5mm, SW=1.2mm). In this state, a three-layer sandwich structure is formed in which the mixture sheet 1 is disposed on both sides of the conductive core 2.
【００２１】このように、シート状に成形された下側の
合剤シート１をベルトコンベア６に載せて移送し、さら
に、上側の合剤シート１を導電芯体２に載せて移送する
方法は、合剤シート１の切断を最も効果的に解消できる
特長がある。それは、移送される合剤シート１に、強い
引張力が作用しないからである。In this way, the lower mixture sheet 1 formed into a sheet shape is placed on the belt conveyor 6 and transported, and the upper mixture sheet 1 is further placed on the conductive core 2 and transported. , has the advantage of being able to most effectively eliminate cutting of the mixture sheet 1. This is because strong tensile force does not act on the mixture sheet 1 being transferred.
【００２２】導電芯体２と一緒に移送される合剤シート
１は、乾燥機７で乾燥される。乾燥機７は、内部温度を
１５０℃としている。合剤シート１は、乾燥機７の中で
約３０秒間乾燥され、水分値３％以下に乾燥される。The mixture sheet 1 transported together with the conductive core 2 is dried in a dryer 7. The dryer 7 has an internal temperature of 150°C. The mixture sheet 1 is dried in the dryer 7 for about 30 seconds to have a moisture content of 3% or less.
【００２３】乾燥機７から出た合剤シート１は、プレス
機４で導電芯体２に充填される。プレス機４は、６００
ｃｍ２の平滑なプレス平面を有し、５トンの圧力で、合
剤シート１を加圧して、導電芯体２の隙間に充填する。
プレスされた電池用極板は、厚みを０．５５ｍｍとした
。さらに、プレスされた電池用極板を２本の圧延ローラ
９で圧延して、電池用極板の厚みを０．４５ｍｍとして
、ドラムに巻き取った。この工程で、連続して導電芯体
２の両面に合剤シート１を密着した帯状の電池用極板の
正極が得られた。The mixture sheet 1 discharged from the dryer 7 is filled into the conductive core 2 by the press 4. Press machine 4 is 600
It has a smooth press plane of cm2, and presses the mixture sheet 1 with a pressure of 5 tons to fill the gap in the conductive core 2. The pressed battery plate had a thickness of 0.55 mm. Further, the pressed battery plate was rolled by two rolling rollers 9 to give a thickness of 0.45 mm, and then wound around a drum. In this step, a strip-shaped positive electrode for a battery plate was obtained in which the mixture sheet 1 was continuously adhered to both sides of the conductive core 2.
【００２４】この構造の電池用極板を正極に使用して電
池を組み立てた。電池用極板は、電池用極板を長さ１９
ｃｍ、幅３ｃｍに裁断した。さらに、電池用極板に集電
体を溶接するために、中央重量部分の合剤を剥離した。
この正極を２６０℃で３時間真空中で乾燥した後、集電
体としてステンレスのタブをスポット溶接した。A battery was assembled using the battery plate having this structure as a positive electrode. The length of the battery plate is 19
cm, and cut into 3 cm width. Furthermore, in order to weld the current collector to the battery electrode plate, the mixture at the center weight portion was peeled off. After drying this positive electrode in vacuum at 260° C. for 3 hours, a stainless steel tab was spot-welded as a current collector.
【００２５】一方、負極として、長さ１９ｃｍ、幅２．
９ｃｍ、厚み０．２ｍｍのリチウムを用い、これに集電
体のタブを圧着し、ハイポアのポリエチレン製セパレー
タで被覆した。On the other hand, as a negative electrode, a length of 19 cm and a width of 2.
A 9 cm and 0.2 mm thick lithium was used, a current collector tab was crimped onto it, and the lithium was covered with a high-pore polyethylene separator.
【００２６】上記のようにして作った正極と負極をスパ
イラル状に卷き、ステンレス外装缶に挿入し、正極の集
電体を外装缶の底にスポット溶接した。次に、絶縁板を
挿入して、封口体を支えるためにシームをし、ショート
を防止するために、絶縁パッキンを外装缶上部に挿入し
、封口体に負極集電体をスポット溶接した。[0026] The positive and negative electrodes produced as described above were rolled up into a spiral shape and inserted into a stainless steel exterior can, and the current collector of the positive electrode was spot welded to the bottom of the exterior can. Next, an insulating plate was inserted, a seam was made to support the sealing body, an insulating packing was inserted into the upper part of the outer can to prevent short circuits, and a negative electrode current collector was spot welded to the sealing body.
【００２７】最後に、プロピレンカーボネイトと、ジオ
キソランとを２：１の割合で混合した溶媒に、過塩素酸
リチウム１モルを混合させた有機電解液を２ミリリット
ル加え、封口機により密封して本発明の方法で電池Ａを
完成した。Finally, 2 milliliters of an organic electrolyte containing 1 mole of lithium perchlorate was added to a solvent containing a mixture of propylene carbonate and dioxolane at a ratio of 2:1, and the mixture was sealed using a sealing machine. Battery A was completed using the following method.
【００２８】本発明の方法で得られた電池Ａの優れた特
性を実証するために、従来の方法で比較電池Ｂを試作し
た。比較電池Ｂは、プレスして合剤シートを導電芯体に
充填することなく、ローラで加圧して合剤シートを導電
芯体に充填する以外、本発明の実施例と同じ方法で電池
を試作した。本発明の電池Ａと、比較電池Ｂとを、室温
で、放電電流１．２Ａ、３秒オン、７秒オフのパルス放
電させて放電特性を測定をした。結果は図２のグラフに
示されている。このグラフに示すように、本発明の方法
で製造した電池Ａは、従来の方法で製造された比較電池
Ｂに比較して、放電末期の電圧降下が小さく、優れた放
電特性を示した。In order to demonstrate the excellent characteristics of battery A obtained by the method of the present invention, a comparative battery B was prototyped using a conventional method. Comparative battery B was a prototype battery manufactured using the same method as the example of the present invention, except that the conductive core was filled with the mixture sheet by pressing with a roller instead of being pressed and filled with the mixture sheet into the conductive core. did. Battery A of the present invention and Comparative Battery B were subjected to pulse discharge at room temperature with a discharge current of 1.2 A, 3 seconds on, 7 seconds off, and discharge characteristics were measured. The results are shown in the graph of FIG. As shown in this graph, Battery A manufactured by the method of the present invention had a smaller voltage drop at the end of discharge and exhibited excellent discharge characteristics than Comparative Battery B manufactured by the conventional method.
【００２９】さらに、本発明の方法で製造された電池用
極板は、合剤密度を高くして大容量にできる特長がある
。表１は、この発明の方法で製造した電池用極板と、比
較のために製造した電池用極板の密度を示している。Furthermore, the battery electrode plate produced by the method of the present invention has the advantage that it can have a high mix density and a large capacity. Table 1 shows the densities of battery plates manufactured by the method of the present invention and battery plates manufactured for comparison.
【００３０】[0030]
【表１】[Table 1]
【００３１】この表において、比較例１の電池用極板は
、合剤シートと導電芯体との積層体を平面的にプレスし
た後、圧延ローラで圧延しないもので、密度は２．５ｇ
／ｃｍ３、導電芯体２の伸び率は１％以下であった。
これに対して、平面的にプレスしないでローラ加圧して
製造した比較例２の電池用極板は、合剤充填密度が２．
４ｇ／ｃｍ３と低く、導電芯体２の伸び率は２％となっ
た。さらに、ローラ加圧して合剤シート１を導電芯体２
に充填し、その後さらに圧延ローラで圧延した比較例３
の電池用極板は、合剤密度が２．６ｇ／ｃｍ３と低く、
導電芯体２の伸び率は５％にもなった。[0031] In this table, the battery plate of Comparative Example 1 is one in which the laminate of the mixture sheet and the conductive core is pressed flat and then not rolled with a rolling roller, and the density is 2.5 g.
/cm3, and the elongation rate of the conductive core 2 was 1% or less. On the other hand, the battery electrode plate of Comparative Example 2, which was manufactured by roller pressing without flat pressing, had a mixture packing density of 2.
The elongation rate of the conductive core 2 was as low as 4 g/cm3, and was 2%. Furthermore, the mixture sheet 1 is applied to the conductive core 2 by applying pressure with a roller.
Comparative Example 3, which was filled with
The battery electrode plate has a low mixture density of 2.6 g/cm3,
The elongation rate of the conductive core 2 was as high as 5%.
【００３２】これに対して、平面的にプレスした後、圧
延ローラ９で圧延した本発明品は、合剤密度が２．７ｇ
／ｃｍ３と高く、基板伸び率は３％と小さくなった。こ
のように、この発明の方法で製造した電池用極板は、比
較例１〜３の電池用極板に比較して合剤密度を高くでき
、また、基板の伸び率を著しく減少できる。On the other hand, the product of the present invention, which was flatly pressed and then rolled by the rolling roller 9, had a mixture density of 2.7 g.
/cm3, and the substrate elongation rate was as low as 3%. As described above, the battery electrode plate manufactured by the method of the present invention can have a higher mixture density than the battery electrode plates of Comparative Examples 1 to 3, and can significantly reduce the elongation rate of the substrate.
【００３３】[0033]
【発明の効果】本発明の電池用極板の製造方法は、理想
的な状態で合剤シートを導電芯体に充填できる。それは
、変形し易い合剤シートを導電芯体の両面に積層して、
平面的に両面から押圧するからである。この状態で押圧
された合剤シートは、水平方向の移動が極めて少ない。
それは、平面的に押圧するプレスは、ローラのように局
部的に押圧しないので、圧力が作用しない部分に合剤シ
ートが移動しないからである。このため、プレス機が合
剤シートを平面的に押圧する圧力は、合剤シートの加圧
部分全体に効果的に作用し、導電芯体に高密度に充填さ
れる。さらに、この状態で加圧すると、実質的に合剤シ
ートに作用する圧力が高くなるにもかかわらず、合剤シ
ートの切れを極減できる。それは、合剤シートが水平方
向に移動して、薄い部分ができないことが理由である。
このため、この発明の方法は、高密度の電池用極板を、
能率よく切れない状態で製造できるという極めて優れた
特長を実現する。Effects of the Invention The method for manufacturing a battery electrode plate of the present invention allows filling a conductive core with a mixture sheet in an ideal state. It is made by laminating easily deformable mixture sheets on both sides of a conductive core.
This is because the pressure is applied from both sides. The mixture sheet pressed in this state has very little movement in the horizontal direction. This is because a press that presses flatly does not press locally like a roller, so the mixture sheet does not move to areas where no pressure is applied. Therefore, the pressure applied by the press to press the mixture sheet in a plane effectively acts on the entire pressed portion of the mixture sheet, and the conductive core is filled with high density. Furthermore, if pressure is applied in this state, the breakage of the mixture sheet can be minimized even though the pressure acting on the mixture sheet becomes substantially higher. The reason for this is that the mixture sheet moves horizontally, creating thin sections. For this reason, the method of the present invention can produce high-density battery plates.
It has the extremely excellent feature of being able to be manufactured efficiently and without cutting.
【００３４】さらに、この発明は、導電芯体の両面に合
剤シートを積層して平面的にプレスしている。この方法
は、１工程で導電芯体の両面に合剤シートを充填できる
ことに加えて、導電芯体の両面に位置する合剤シートは
、互いに導電芯体を挟着する状態で、高密度に充填され
る。このため、この発明の方法は、電池用極板を能率よ
く多量生産できる特長がある。Furthermore, in the present invention, mixture sheets are laminated on both sides of the conductive core and pressed flat. In addition to being able to fill both sides of the conductive core with mixture sheets in one step, this method also allows the mixture sheets located on both sides of the conductive core to be filled with high density by sandwiching the conductive core between them. Filled. Therefore, the method of the present invention has the advantage of being able to efficiently mass-produce battery plates.
【００３５】さらにまた、この発明の方法は、合剤シー
トと導電芯体の積層体を平面的にプレスするので、加圧
工程における導電芯体の伸びも少なくでき、加圧された
電池用極板の蛇行を解消して、加圧工程において電池用
極板がたるむことがなく、フープ状の電池用極板を能率
よく生産できる特長も実現する。Furthermore, since the method of the present invention presses the laminate of the mixture sheet and the conductive core in a flat manner, the elongation of the conductive core during the pressing process can be reduced, and the pressed battery electrode By eliminating the meandering of the plates, the battery electrode plates do not sag during the pressurization process, and hoop-shaped battery electrode plates can be efficiently produced.
【図１】本発明の電池用極板の製造装置の概略側面図[Fig. 1] A schematic side view of the manufacturing apparatus for battery electrode plates of the present invention.
【
図２】本発明と従来の方法で製造した電池用極板を使用
した電池のパルス放電特性を示すグラフ。[
FIG. 2 is a graph showing the pulse discharge characteristics of batteries using battery plates manufactured by the present invention and the conventional method.
Claims (1)
物を得る第１工程と、前記混合物をローラ加工して合剤
シート（１）を作製する第２工程と、前記合剤シート（
１）を、帯状の導電芯体（２）の両面に供給し、合剤シ
ート（１）が積層された該導電芯体（２）の両面を平面
的にプレス加圧して帯状極板（３）を作製する第３工程
と、前記帯状極板（３）をローラ加圧して圧延する第４
工程と、前記帯状極板（３）を切断して電極とする第５
工程とからなることを特徴とする電池用極板の製造方法
。1. A first step of mixing an active material and a binder to obtain an active material mixture; a second step of processing the mixture with a roller to produce a mixture sheet (1); and a second step of preparing a mixture sheet (1). (
1) is supplied to both sides of a strip-shaped conductive core (2), and both sides of the conductive core (2) on which the mixture sheet (1) is laminated are pressed flat to form a strip-shaped electrode plate (3). ), and a fourth step of rolling the strip-shaped electrode plate (3) by applying pressure with a roller.
a fifth step of cutting the strip-shaped electrode plate (3) to form an electrode;
1. A method for manufacturing a battery electrode plate, comprising the steps of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2418466A JPH04249857A (en) | 1990-12-28 | 1990-12-28 | Manufacture of battery electrode plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2418466A JPH04249857A (en) | 1990-12-28 | 1990-12-28 | Manufacture of battery electrode plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04249857A true JPH04249857A (en) | 1992-09-04 |
Family
ID=18526302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2418466A Pending JPH04249857A (en) | 1990-12-28 | 1990-12-28 | Manufacture of battery electrode plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04249857A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005747A (en) * | 2005-05-27 | 2007-01-11 | Nippon Zeon Co Ltd | Manufacturing method of sheet for electrochemical element electrode |
| JPWO2005117043A1 (en) * | 2004-05-27 | 2008-04-03 | 日本ゼオン株式会社 | Electrode device electrode manufacturing method and apparatus |
| JP2013206692A (en) * | 2012-03-28 | 2013-10-07 | Mitsubishi Materials Corp | Method of pressing battery electrode and its pressing device |
| DE102019118110A1 (en) * | 2019-07-04 | 2021-01-07 | Bayerische Motoren Werke Aktiengesellschaft | Method of making an electrode |
| WO2021033492A1 (en) * | 2019-08-19 | 2021-02-25 | 富士フイルム株式会社 | Manufacturing method of molded product for electrode |
-
1990
- 1990-12-28 JP JP2418466A patent/JPH04249857A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005117043A1 (en) * | 2004-05-27 | 2008-04-03 | 日本ゼオン株式会社 | Electrode device electrode manufacturing method and apparatus |
| JP2007005747A (en) * | 2005-05-27 | 2007-01-11 | Nippon Zeon Co Ltd | Manufacturing method of sheet for electrochemical element electrode |
| JP2013206692A (en) * | 2012-03-28 | 2013-10-07 | Mitsubishi Materials Corp | Method of pressing battery electrode and its pressing device |
| DE102019118110A1 (en) * | 2019-07-04 | 2021-01-07 | Bayerische Motoren Werke Aktiengesellschaft | Method of making an electrode |
| WO2021033492A1 (en) * | 2019-08-19 | 2021-02-25 | 富士フイルム株式会社 | Manufacturing method of molded product for electrode |
| JPWO2021033492A1 (en) * | 2019-08-19 | 2021-02-25 |
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