JP2002237298A - Method of manufacturing electrode, and device used for the method - Google Patents
Method of manufacturing electrode, and device used for the methodInfo
- Publication number
- JP2002237298A JP2002237298A JP2001034309A JP2001034309A JP2002237298A JP 2002237298 A JP2002237298 A JP 2002237298A JP 2001034309 A JP2001034309 A JP 2001034309A JP 2001034309 A JP2001034309 A JP 2001034309A JP 2002237298 A JP2002237298 A JP 2002237298A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- rollers
- heating
- positive electrode
- electrode mixture
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電極の製造方法及
びその方法に用いられる装置に関し、特に電池の放電容
量のバラツキを低減できる電極の製造方法及びその方法
に用いられる装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electrode and an apparatus used for the method, and more particularly to a method for manufacturing an electrode capable of reducing variation in discharge capacity of a battery and an apparatus used for the method.
【０００２】[0002]
【従来の技術】従来、電極板（特に、正極板）の製造方
法としては、以下に示すような方法が提案されている。
即ち、正極板を例にとって説明すると、湿潤状態の正極
合剤を一対の加熱ローラ間に供給し、この加熱ローラで
正極合剤シートに加工した後、この正極合剤シートと正
極芯材とを圧着ローラに供給し、この圧着ローラで両者
を圧着する。そして、この圧着物を、図４に示すよう
に、複数の極板が得られるように切断線５１で極板の幅
寸法Ｌ3 となるように切断した後、極板の長さ寸法Ｌ4
となるように切断線５２で切断することにより正極板を
作製する方法である。尚、正極芯材の両面に正極合剤シ
ートを圧着する場合には、一対の加熱ローラを２つ設
け、対となっている加熱ローラに正極合剤をそれぞれ供
給して２枚の正極合剤シートを作製し、この正極合剤シ
ートを正極芯材のそれぞれの面に位置するように圧着ロ
ーラに供給して、正極芯材と２枚の正極合剤シートとを
圧着するような方法が採用されている。2. Description of the Related Art Conventionally, the following method has been proposed as a method for manufacturing an electrode plate (particularly, a positive electrode plate).
That is, taking the positive electrode plate as an example, a positive electrode mixture in a wet state is supplied between a pair of heating rollers, processed into a positive electrode mixture sheet with the heating rollers, and then the positive electrode mixture sheet and the positive electrode core material are separated. The pressure is supplied to a pressure roller, and both are pressed by the pressure roller. Then, as shown in FIG. 4, this crimped product is cut along the cutting line 51 so as to have a width L 3 of the electrode plate so as to obtain a plurality of electrode plates, and then the length L 4 of the electrode plate is obtained.
This is a method of producing a positive electrode plate by cutting along a cutting line 52 so that When the positive electrode mixture sheets are pressure-bonded to both surfaces of the positive electrode core material, two pairs of heating rollers are provided, and the positive electrode mixture is supplied to the pair of heating rollers to supply the two positive electrode mixture sheets. A method is used in which a sheet is prepared, and the positive electrode mixture sheet is supplied to a pressure roller so as to be positioned on each surface of the positive electrode core material, and the positive electrode core material and two positive electrode material sheets are pressure-bonded. Have been.
【０００３】しかしながら、上記従来の方法では、以下
に示すような課題を有していた。即ち、正極合剤シート
を作製する際、一対の加熱ローラ上で正極合剤が滞留す
るが、この時、加熱ローラの中央部は端部に比べて、滞
留している正極合剤に奪われる熱量が多くなるため、中
央部は端部に比べて温度が低くなる。一方、正極合剤を
作製する際には、粉末状の正極活物質同士を結着するた
めにポリテトラフルオロエチレン（ＰＴＦＥ）等の結着
剤を混合しているが、この結着剤は温度により伸びが異
なる（具体的には、温度が低い程、伸び量が少なくな
る）という性質がある。これらのことから、加熱ローラ
により作製される正極合剤シートにおいて、端部と中央
部とでは厚みが異なることになる（具体的には、温度の
高い加熱ローラの端部に対応する正極合剤シートの端部
５３は、温度の低い加熱ローラの中央部に対応する正極
合剤シートの中央部５４より薄くなる）。このことは、
その後の圧着ローラで正極合剤シートと正極芯材と圧着
するという工程を経ても変わらないので、その後の切断
工程において、正極合剤シート端部５３から作製された
正極板は、正極合剤シート中央部５４から作製された正
極板より薄くなる。このように、正極板毎に厚みの差異
が生じると、正極板厚みは正極板質量すなわち正極板に
含まれる正極活物質に比例するので、同一の正極合剤シ
ートを用いて作製した電池であっても、電池毎に放電容
量のバラツキが生じるという課題を有していた。[0003] However, the above-mentioned conventional method has the following problems. That is, when producing the positive electrode mixture sheet, the positive electrode mixture stagnates on the pair of heating rollers, but at this time, the central part of the heating roller is deprived by the stagnation positive electrode mixture compared with the end portions. Since the amount of heat increases, the temperature of the central portion is lower than that of the end portion. On the other hand, when preparing a positive electrode mixture, a binder such as polytetrafluoroethylene (PTFE) is mixed in order to bind the powdered positive electrode active materials to each other. (Specifically, the lower the temperature, the smaller the amount of elongation). From these facts, in the positive electrode mixture sheet produced by the heating roller, the thickness differs between the end portion and the center portion (specifically, the positive electrode mixture sheet corresponding to the end portion of the heating roller having a high temperature). The end portion 53 of the sheet is thinner than the central portion 54 of the positive electrode mixture sheet corresponding to the central portion of the lower temperature heating roller). This means
Since it does not change even after the step of pressing the positive electrode mixture sheet and the positive electrode core material with the subsequent pressing roller, in the subsequent cutting step, the positive electrode plate produced from the positive electrode mixture sheet end 53 is replaced with the positive electrode mixture sheet. It is thinner than the positive electrode plate made from the central part 54. As described above, when the thickness of each positive electrode plate varies, the thickness of the positive electrode plate is proportional to the mass of the positive electrode plate, that is, the positive electrode active material contained in the positive electrode plate. However, there is a problem that the discharge capacity varies from battery to battery.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、以上の事情
に鑑みなされたものであって、電極合剤が貯留された状
態で加熱ローラの中央部と端部とにおける温度差を低減
することにより、正極合剤シートにおける厚みの不均一
を抑制し、電池毎に放電容量のバラツキが生じるのを抑
制することができる電極の製造方法及びその方法に用い
られる装置を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to reduce a temperature difference between a central portion and an end portion of a heating roller in a state where an electrode mixture is stored. Accordingly, it is an object of the present invention to provide a method of manufacturing an electrode capable of suppressing unevenness in the thickness of a positive electrode mixture sheet and suppressing variation in discharge capacity for each battery, and an apparatus used in the method. .
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明のうちで請求項１記載の発明は、電極合剤貯
留タンクから供給された湿潤状態の電極合剤を一対の加
熱ローラに供給し、この加熱ローラで電極合剤シートに
加工するステップと、上記電極合剤シートと電極芯材と
を上記加熱ローラの下流側に存在する一対の圧着ローラ
に供給し、この圧着ローラで両者を圧着するステップと
を備えた電極の製造方法において、上記加熱ローラは、
電極合剤が加熱ローラ間に滞留していない状態で、ロー
ラの幅方向でローラの表面温度に温度差が存在すること
を特徴とする。In order to achieve the above object, the invention according to claim 1 of the present invention is directed to a method in which a wet electrode mixture supplied from an electrode mixture storage tank is supplied to a pair of heating rollers. And processing the electrode mixture sheet with the heating roller, and supplying the electrode mixture sheet and the electrode core material to a pair of pressure rollers existing downstream of the heating roller. And a step of crimping both, the heating roller,
In a state where the electrode mixture does not stay between the heating rollers, there is a difference in the surface temperature of the rollers in the width direction of the rollers.
【０００６】上記方法の如く、電極合剤が加熱ローラ間
に滞留していない状態で、ローラの幅方向でローラの表
面温度に温度差が存在していれば、加熱ローラ上に電極
合剤が滞留した場合に、加熱ローラの高温部分では、滞
留している電極合剤に奪われる熱量が多くなる一方、加
熱ローラの低温部分では、滞留している電極合剤に奪わ
れる熱量が少なくなるようにすることが可能となるた
め、加熱ローラ上に電極合剤が滞留した状態で、加熱ロ
ーラの幅方向において温度差が生じるのを抑制すること
ができる。したがって、加熱ローラから排出される電極
合剤シートにおける厚みの不均一を抑制することがで
き、この結果、電池毎に放電容量にバラツキが生じるの
を抑制することができる。As described above, when there is a temperature difference in the surface temperature of the roller in the width direction of the roller in a state where the electrode mixture does not stay between the heating rollers, the electrode mixture is deposited on the heating roller. In the case of stagnation, in the high-temperature portion of the heating roller, the amount of heat deprived by the stagnant electrode mixture increases, while in the low-temperature portion of the heating roller, the amount of heat deprived by the stagnating electrode mixture decreases. Therefore, it is possible to suppress the occurrence of a temperature difference in the width direction of the heating roller in a state where the electrode mixture remains on the heating roller. Therefore, it is possible to suppress unevenness in the thickness of the electrode mixture sheet discharged from the heating roller, and as a result, it is possible to suppress occurrence of variation in discharge capacity for each battery.
【０００７】また、請求項２記載の発明は、請求項１記
載の発明において、上記加熱ローラとして、複数個のロ
ーラに分割され且つそれぞれのローラが温度制御可能な
ものを用いることを特徴とする。このように、分割され
た複数個のローラがそれぞれ温度制御可能であれば、加
熱ローラの幅方向においてローラの表面温度に温度差を
設けるということを容易に実現することができる。According to a second aspect of the present invention, in the first aspect of the present invention, the heating roller is divided into a plurality of rollers and each of the rollers is capable of controlling the temperature. . As described above, if the plurality of divided rollers can control the temperature, it is possible to easily realize the temperature difference between the surface temperatures of the rollers in the width direction of the heating roller.
【０００８】また、請求項３記載の発明は、請求項１又
は２記載の発明において、上記加熱ローラとして、ロー
ラの幅方向端部（以下、ローラ端部と略する）からロー
ラの幅方向中央部（以下、ローラ中央部と略する）に行
くにつれて高温となるように温度制御されたものを用い
ることを特徴とする。一対の加熱ローラ上で電極合剤が
滞留した場合、ローラ中央部はローラ端部に比べて、滞
留している電極合剤に奪われる熱量が多くなる。したが
って、電極合剤が加熱ローラ間に滞留していない状態
で、ローラ端部からローラ中央部に行くにつれて高温と
なるように加熱ローラが温度制御されていれば、加熱ロ
ーラの幅方向において温度差が生じるのを抑制すること
ができる。According to a third aspect of the present invention, in the first or second aspect of the present invention, the heating roller is arranged such that the heating roller extends from a widthwise end of the roller (hereinafter abbreviated as a roller end) to a widthwise center of the roller. The temperature is controlled so that the temperature becomes higher as going to a roller portion (hereinafter abbreviated as a roller central portion). When the electrode mixture stays on the pair of heating rollers, the amount of heat taken by the staying electrode mixture is greater at the center of the roller than at the roller end. Therefore, if the temperature of the heating roller is controlled such that the temperature increases from the roller end to the center of the roller in a state where the electrode mixture does not stay between the heating rollers, the temperature difference in the width direction of the heating roller is increased. Can be suppressed.
【０００９】上記目的を達成するために、本発明のうち
で請求項４記載の発明は、電極合剤貯留タンクから供給
された湿潤状態の電極合剤を電極合剤シートに加工する
一対の加熱ローラと、この加熱ローラの下流側に存在
し、積層状態で搬送される上記電極合剤シートと電極芯
材とを圧着する一対の圧着ローラとを備えた電極の製造
装置において、上記加熱ローラは、電極合剤が加熱ロー
ラ間に滞留していない状態で、ローラの幅方向でローラ
の表面温度に温度差が存在するように制御可能な構造と
なっていることを特徴とする。このような装置を用いる
ことにより、請求項１記載の製造方法を容易に実現する
ことができる。In order to achieve the above object, an invention according to a fourth aspect of the present invention is directed to a pair of heating apparatuses for processing a wet electrode mixture supplied from an electrode mixture storage tank into an electrode mixture sheet. A roller and a pair of pressure rollers that are present downstream of the heating roller and that press the electrode mixture sheet and the electrode core material conveyed in a laminated state with a pair of pressure rollers, wherein the heating roller is Further, in a state where the electrode mixture does not stay between the heating rollers, the electrode mixture is controlled so that there is a temperature difference in the surface temperature of the rollers in the width direction of the rollers. By using such an apparatus, the manufacturing method according to claim 1 can be easily realized.
【００１０】また、請求項５記載の発明は、請求項４記
載の発明において、上記加熱ローラは、複数個のローラ
に分割され且つそれぞれのローラが温度制御が可能とな
るように構成されることを特徴とする。このような装置
を用いることにより、請求項２記載の製造方法を容易に
実現することができる。According to a fifth aspect of the present invention, in the fourth aspect of the invention, the heating roller is divided into a plurality of rollers, and each of the rollers can be controlled in temperature. It is characterized by. By using such an apparatus, the manufacturing method according to claim 2 can be easily realized.
【００１１】また、請求項６記載の発明は、請求項４又
は５記載の発明において、上記加熱ローラは、ローラ端
部からローラ中央部に行くにつれて高温となるように温
度制御されることを特徴とする。このような装置を用い
ることにより、請求項３記載の製造方法を容易に実現す
ることができる。According to a sixth aspect of the present invention, in the fourth or fifth aspect of the present invention, the temperature of the heating roller is controlled such that the temperature of the heating roller becomes higher from the end of the roller toward the center of the roller. And By using such an apparatus, the manufacturing method according to claim 3 can be easily realized.
【００１２】また、請求項７記載の発明は、請求項４〜
６記載の発明において、上記加熱ローラの外周における
ローラ幅方向中心部近傍には、補助ヒータが設けられて
いることを特徴とする。このように補助ヒータを設ける
ことにより、一層容易にローラ中央部を高温状態とする
ことができる。[0012] The invention according to claim 7 provides the invention according to claims 4 to
6. The invention according to claim 6, wherein an auxiliary heater is provided near the center in the roller width direction on the outer periphery of the heating roller. By providing the auxiliary heater in this manner, the central portion of the roller can be more easily brought to a high temperature state.
【００１３】[0013]
【発明の実施の形態】本発明の実施の形態を、図１〜図
３に基づいて、以下に説明する。図１は本発明の電極の
製造方法に用いられる装置の概略説明図、図２は加熱ロ
ーラの斜視図、図３は加熱ローラの変形例を示す斜視図
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic explanatory view of an apparatus used in the method for manufacturing an electrode of the present invention, FIG. 2 is a perspective view of a heating roller, and FIG. 3 is a perspective view showing a modification of the heating roller.
【００１４】図１に示すように、本発明の電極の製造方
法に用いられる装置は、湿潤状態の正極合剤２・２が貯
留されたホッパー１・１と、これら各ホッパー１・１に
対応して設けられ、且つ、ホッパー１・１から供給され
る正極合剤２・２を加圧、加熱することにより正極合剤
シート３・３を作製する一対の加熱ローラ４・４と、こ
の加熱ローラ４・４から供給された正極合剤シート３・
３を、それぞれ正極芯材５の各面に配置した状態でこれ
らを加圧、加熱することにより、正極芯材５に正極合剤
シート３・３を圧着する一対の圧着ローラ６・６とを有
している。尚、図１中、７は補助ローラである。As shown in FIG. 1, an apparatus used in the method of manufacturing an electrode according to the present invention includes a hopper 1.1 in which a positive electrode mixture 2.2 in a wet state is stored, and a hopper 1.1 corresponding to each of these hoppers 1.1. And a pair of heating rollers 4.4 for producing the positive electrode mixture sheets 3.3 by pressurizing and heating the positive electrode mixture 2.2 supplied from the hopper 1.1. Positive electrode mixture sheet 3 supplied from rollers 4
A pair of pressure rollers 6, 6 for pressing the positive electrode mixture sheets 3, 3 to the positive electrode core material 5 by pressing and heating these in a state in which each of them is disposed on each surface of the positive electrode core material 5, respectively. Have. In FIG. 1, reference numeral 7 denotes an auxiliary roller.
【００１５】上記加熱ローラ４は、図２に示すように、
３分割された分割ローラ部分１０ａ・１０ａ・１０ｂを
有しており、これら分割ローラ部分１０ａ・１０ａ・１
０ｂの幅Ｌ1 は６０ｍｍとなるように構成されている。
また、上記分割ローラ部分１０ａ・１０ａ・１０ｂ間に
は、分割ローラ部分１０ａ・１０ａ・１０ｂ間での断熱
を図るためのパッキング１１・１１が設けられており、
これらパッキング１１・１１の幅Ｌ2 は１０ｍｍとなる
ように構成されている。更に、上記分割ローラ部分１０
ａ・１０ａ・１０ｂのうち中央部に配置された分割ロー
ラ部分１０ｂにおける正極合剤シート３・３作製位置と
は反対側の位置には、分割ローラ部分１０ｂのみを加熱
するための補助ヒータ１２が配置されている。The heating roller 4 is, as shown in FIG.
It has three divided roller portions 10a, 10a, 10b, and these divided roller portions 10a, 10a, 1
Width L 1 = 0b is configured to be 60 mm.
Further, packings 11 are provided between the divided roller portions 10a, 10a, and 10b to provide heat insulation between the divided roller portions 10a, 10a, and 10b.
Width L 2 of the packing 11, 11 is configured to be 10 mm. Further, the split roller portion 10
An auxiliary heater 12 for heating only the divided roller portion 10b is provided at a position of the divided roller portion 10b arranged at the center portion of the divided roller portion 10b on the side opposite to the position where the positive electrode mixture sheet 3.3 is formed. Are located.
【００１６】ここで、上記装置を用いて正極を作製した
ので、その具体的な方法を以下に示す。先ず、正極活物
質としての二酸化マンガン９０質量部と、導電剤として
のグラファイト１０質量部とを良く混合した後、この混
合物に結着剤としてのポリテトラフルオロエチレン（Ｐ
ＴＦＥ）の分散液５質量部と純水２０質量部とを加えて
混練し、粉砕整流して湿潤状態の正極合剤を作製した。
次に、湿潤状態の正極合剤２・２をホッパー１・１に装
填し、このホッパー１・１から加熱ローラ４・４に正極
合剤２・２を供給して、正極合剤シート３・３（幅：２
００ｍｍ、厚み：０．５ｍｍ）を作製した。この際、正
極合剤２・２が加熱ローラ４・４間に滞留していない状
態で、加熱ローラ４・４の端部に存在する分割ローラ部
分１０ａ・１０ａの温度は１００℃に、加熱ローラ４・
４の中央部に存在する分割ローラ部分１０ｂの温度は１
１０℃に設定した。このように温度設定することによ
り、加熱ローラ４・４上に正極合剤が滞留した場合、中
央部に存在する分割ローラ部分１０ｂは端部に存在する
分割ローラ部分１０ａ・１０ａに比べて滞留している正
極合剤に奪われる熱量が多くなるので、加熱ローラ４・
４の幅方向において温度差が生じるのを抑制することが
可能となる。Here, a positive electrode was manufactured using the above-described apparatus, and a specific method thereof will be described below. First, 90 parts by mass of manganese dioxide as a positive electrode active material and 10 parts by mass of graphite as a conductive agent are mixed well, and then the mixture is mixed with polytetrafluoroethylene (P) as a binder.
5 parts by mass of a dispersion of TFE) and 20 parts by mass of pure water were added, kneaded, pulverized and rectified to produce a wet cathode mixture.
Next, the positive electrode mixture 2.2 in a wet state is loaded into the hopper 1.1, and the positive electrode mixture 2.2 is supplied from the hopper 1.1 to the heating rollers 4.4 to form the positive electrode mixture sheet 3. 3 (width: 2
00 mm, thickness: 0.5 mm). At this time, in a state where the positive electrode mixture 2.2 does not stay between the heating rollers 4.4, the temperature of the divided roller portions 10a at the ends of the heating rollers 4.4 becomes 100 ° C. 4.
The temperature of the divided roller portion 10b existing at the center of
The temperature was set at 10 ° C. By setting the temperature in this way, when the positive electrode mixture stays on the heating rollers 4.4, the divided roller portion 10b located at the center portion stays longer than the divided roller portions 10a located at the end portions. Since the amount of heat taken by the positive electrode mixture increases, the heating roller 4
4 can be prevented from generating a temperature difference in the width direction.
【００１７】尚、分割ローラ部分１０ｂの温度を分割ロ
ーラ部分１０ａ・１０ａより高く設定する手段として
は、分割ローラ部分１０ｂのみを加熱するための補助ヒ
ータ１２により成され、また、正極合剤シート３・３の
厚みの調整は、加熱ローラ４・４間の隙間の大きさを調
整することにより成されている。The means for setting the temperature of the divided roller portion 10b higher than that of the divided roller portions 10a is constituted by an auxiliary heater 12 for heating only the divided roller portion 10b. Adjustment of the thickness of 3 is performed by adjusting the size of the gap between the heating rollers 4.
【００１８】次いで、上記正極合剤シート３・３を、そ
れぞれ正極芯材５の各面に配置した状態でこれらを１０
０〜１３０℃に加熱された圧着ローラ６・６で加圧、加
熱することにより、正極芯材５に正極合剤シート３・３
を圧着した。この後、この圧着物を正極幅（２５ｍｍ）
と同様の幅となるように８列で切断し、更に正極長さ
（２００ｍｍ）と同様の長さとなるように切断して正極
板を作製した。Next, the above-described positive electrode mixture sheets 3.3 are placed on each surface of the positive electrode
By pressing and heating with pressure rollers 6 heated to 0 to 130 ° C., the positive electrode mixture sheet 3
Was crimped. After that, the compressed product is put on the positive electrode width (25 mm).
Then, it was cut into eight rows so as to have the same width as that described above, and further cut so as to have the same length as the length of the positive electrode (200 mm) to produce a positive electrode plate.
【００１９】尚、加熱ローラ４・４の構造は分割構造に
限定するものではなく、図３に示すように、分割してい
ない構造であっても良い。但し、分割構造としている方
が、加熱ローラ４・４の幅方向においてローラの表面温
度に温度差を設け易くなるという利点がある。一方、加
熱ローラ４・４を分割する場合には、３分割に限定する
ものではなく、４分割以上であっても良い。そして、例
えば、５分割とする場合には、中央の分割ロール部分に
は高温の補助ヒータを設け、これに隣接する分割ロール
部分には若干低温の補助ヒータを設け、端部にある分割
ロール部分には補助ヒータを設けないというような構成
であっても良い。The structure of the heating rollers 4 is not limited to a divided structure, but may be an undivided structure as shown in FIG. However, the divided structure has an advantage that a temperature difference is easily provided in the surface temperature of the heating rollers 4 in the width direction. On the other hand, when dividing the heating rollers 4, the number of divisions is not limited to three, and may be four or more. For example, in the case of five divisions, a high-temperature auxiliary heater is provided in the center divided roll portion, a slightly low-temperature auxiliary heater is provided in the adjacent divided roll portion, and the divided roll portion at the end portion is provided. May not be provided with an auxiliary heater.
【００２０】また、加熱ローラ４・４の分割ロール部分
１０ａ・１０ａ・１０ｂにおける温度設定は、上記の温
度設定に限定するものではなく、結着剤の種類や量によ
って適宜変更すれば良い。The temperature setting at the divided roll portions 10a, 10a, 10b of the heating rollers 4, 4 is not limited to the above-mentioned temperature setting, but may be changed as appropriate depending on the type and amount of the binder.
【００２１】更に、加熱ローラ４・４の分割ロール部分
１０ａ・１０ａ・１０ｂにおける温度設定は、補助ヒー
タ１２で成されるという構成に限定するものではなく、
分割ロール部分１０ａ・１０ａ・１０ｂのそれぞれに設
けられた内部ヒータにより成される構成であっても良
い。Further, the temperature setting in the divided roll portions 10a, 10a, 10b of the heating rollers 4, 4 is not limited to the configuration in which the auxiliary heater 12 is used.
It may be configured by an internal heater provided in each of the divided roll portions 10a, 10a, 10b.
【００２２】加えて、本発明の方法及び装置は、正極の
製造のみではなく、例えば、炭素材料等の粉状物と結着
剤とを混練して作製する負極の製造にも適応しうること
は勿論である。In addition, the method and apparatus of the present invention can be applied not only to the production of a positive electrode but also to the production of a negative electrode produced by kneading a powdery substance such as a carbon material and a binder. Of course.
【００２３】[0023]
【実施例】〔実施例〕上記の発明の実施の形態の方法で
作製した正極と、リチウム金属から成る負極とを、ポリ
エチレン製微多孔膜から成るセパレータを介して巻回し
て渦巻き状の発電要素を作製した後、この発電要素を外
装缶内に挿入し、更に、エチレンカーボネート（ＥＣ）
とブチレンカーボネート（ＢＣ）とジメトキシエタン
（ＤＭＥ）との混合溶媒に、ＬｉＣＦ3 ＳＯ3 が１Ｍ
（モル／リットル）の割合で溶解された電解液を外装缶
内に注入し、外装缶を封口することにより電池を作製し
た。このようにして作製した電池を、以下本発明電池Ａ
と称する。EXAMPLES A positive electrode produced by the method of the embodiment of the present invention and a negative electrode made of lithium metal are wound through a separator made of a microporous polyethylene film to form a spiral power generating element. After this, the power generating element is inserted into an outer can, and further, ethylene carbonate (EC)
1M LiCF 3 SO 3 in a mixed solvent of benzene and butylene carbonate (BC) and dimethoxyethane (DME)
(Mol / liter) An electrolytic solution dissolved at a ratio of (mol / liter) was poured into the outer can, and the outer can was sealed to produce a battery. The battery fabricated in this manner is hereinafter referred to as Battery A of the present invention.
Called.
【００２４】〔比較例〕正極作製時に、正極合剤が加熱
ローラ間に滞留していない状態で、ローラの端部とロー
ラの中心部とで温度差が設けられていない加熱ローラを
用いた他は、上記実施例と同様にして電池を作製した。
このようにして作製した電池を、以下比較電池Ｘと称す
る。[Comparative Example] In the state where the positive electrode mixture did not stay between the heating rollers during the production of the positive electrode, a heating roller having no temperature difference between the end of the roller and the center of the roller was used. A battery was manufactured in the same manner as in the above example.
The battery fabricated in this manner is hereinafter referred to as Comparative Battery X.
【００２５】〔実験〕上記本発明電池Ａと比較電池Ｘと
において、２００Ωの抵抗で電池電圧が２Ｖまで放電さ
せ、各電池の放電容量のバラツキについて測定したの
で、その結果を下記表１に示す。尚、電池の試料数は、
各電池１００個とした。[Experiment] The battery A of the present invention and the comparative battery X were discharged at a resistance of 200Ω until the battery voltage reached 2 V, and the variation in the discharge capacity of each battery was measured. The results are shown in Table 1 below. . The number of battery samples is
Each battery was 100 pieces.
【００２６】[0026]
【表１】 [Table 1]
【００２７】上記表１から明らかなように、本発明電池
Ａは比較電池Ｘに比べて、放電容量のバラツキが格段に
低減されていることが分かる。As is clear from Table 1, the battery A of the present invention has a significantly reduced variation in discharge capacity as compared with the comparative battery X.
【００２８】[0028]
【発明の効果】以上説明したように本発明によれば、電
極合剤が貯留された状態で加熱ローラの中央部と端部と
における温度差を低減することにより、正極合剤シート
における厚みの不均一を抑制し、電池毎に放電容量にバ
ラツキが生じるのを抑制することができるといった優れ
た効果を奏する。As described above, according to the present invention, the thickness of the positive electrode mixture sheet can be reduced by reducing the temperature difference between the center and the end of the heating roller in a state where the electrode mixture is stored. An excellent effect of suppressing non-uniformity and suppressing variation in discharge capacity for each battery is achieved.
【図１】本発明の電極の製造方法に用いられる装置の概
略説明図である。FIG. 1 is a schematic explanatory view of an apparatus used for a method for manufacturing an electrode according to the present invention.
【図２】加熱ローラの斜視図である。FIG. 2 is a perspective view of a heating roller.
【図３】加熱ローラの変形例を示す斜視図である。FIG. 3 is a perspective view showing a modification of the heating roller.
【図４】圧着物の切断方法を示す説明図である。FIG. 4 is an explanatory view showing a method for cutting a crimped article.
１：ホッパー ２：正極合剤 ３：正極合剤シート ４：加熱ローラ ５：正極芯材 ６：圧着ローラ １０ａ：分割ローラ部分 １０ｂ：分割ローラ部分 １１：パッキング １２：補助ヒータ 1: Hopper 2: Positive electrode mixture 3: Positive electrode mixture sheet 4: Heating roller 5: Positive electrode core material 6: Compression roller 10a: Split roller portion 10b: Split roller portion 11: Packing 12: Auxiliary heater
───────────────────────────────────────────────────── フロントページの続き (72)発明者 諏訪 弘光 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 (72)発明者 坂口 眞一郎 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 (72)発明者 成瀬 悟 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 Ｆターム(参考） 5H050 AA19 BA16 CA05 CB12 FA08 GA02 GA03 GA29 HA14 ──────────────────────────────────────────────────の Continuing from the front page (72) Hiromitsu Suwa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Shinichiro Sakaguchi 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Satoru Naruse 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 5H050 AA19 BA16 CA05 CB12 FA08 GA02 GA03 GA29 HA14
Claims (7)
状態の電極合剤を一対の加熱ローラに供給し、この加熱
ローラで電極合剤シートに加工するステップと、上記電
極合剤シートと電極芯材とを上記加熱ローラの下流側に
存在する一対の圧着ローラに供給し、この圧着ローラで
両者を圧着するステップとを備えた電極の製造方法にお
いて、 上記加熱ローラは、上記電極合剤が加熱ローラ間に滞留
していない状態で、ローラの幅方向でローラの表面温度
に温度差が存在することを特徴とする電極の製造方法。A step of supplying the electrode mixture in a wet state supplied from an electrode mixture storage tank to a pair of heating rollers, and processing the electrode mixture sheet with the heating rollers; Supplying a core material to a pair of pressure rollers existing downstream of the heating roller, and pressing the two with the pressure roller. A method for manufacturing an electrode, wherein a temperature difference exists in a surface temperature of a roller in a width direction of the roller without staying between heating rollers.
に分割され且つそれぞれのローラが温度制御可能なもの
を用いる、請求項１記載の電極の製造方法。2. The method for manufacturing an electrode according to claim 1, wherein the heating roller is divided into a plurality of rollers and each of the rollers is capable of controlling the temperature.
端部からローラの幅方向中央部に行くにつれて高温とな
るように温度制御されたものを用いる、請求項１又は２
記載の電極の製造方法。3. The heating roller according to claim 1, wherein the temperature of the heating roller is controlled such that the temperature of the heating roller increases from the widthwise end to the center of the roller in the widthwise direction.
The method for producing an electrode according to the above.
状態の電極合剤を電極合剤シートに加工する一対の加熱
ローラと、この加熱ローラの下流側に存在し、積層状態
で搬送される上記電極合剤シートと電極芯材とを圧着す
る一対の圧着ローラとを備えた電極の製造装置におい
て、 上記加熱ローラは、上記電極合剤が加熱ローラ間に滞留
していない状態で、ローラの幅方向でローラの表面温度
に温度差が存在するように制御可能な構造となっている
ことを特徴とする電極の製造装置。4. A pair of heating rollers for processing an electrode mixture sheet in a wet state supplied from an electrode mixture storage tank into an electrode mixture sheet, and present downstream of the heating rollers and conveyed in a stacked state. In an electrode manufacturing apparatus including a pair of pressure bonding rollers for pressing the electrode mixture sheet and the electrode core material, wherein the heating roller has a state in which the electrode mixture is not retained between the heating rollers, An electrode manufacturing apparatus having a structure which can be controlled so that a temperature difference exists in a surface temperature of a roller in a width direction.
割され且つそれぞれのローラが温度制御が可能となるよ
うに構成される、請求項４記載の電極の製造装置。5. The electrode manufacturing apparatus according to claim 4, wherein the heating roller is divided into a plurality of rollers, and each of the rollers can be controlled in temperature.
からローラの幅方向中央部に行くにつれて高温となるよ
うに温度制御される、請求項４又は５記載の電極の製造
装置。6. The electrode manufacturing apparatus according to claim 4, wherein the temperature of the heating roller is controlled so that the temperature of the heating roller becomes higher as it goes from the widthwise end of the roller to the center in the widthwise direction of the roller.
方向中心部近傍には、補助ヒータが設けられている、請
求項４〜６記載の電極の製造装置。7. The apparatus for manufacturing an electrode according to claim 4, wherein an auxiliary heater is provided near a center portion of the outer periphery of the heating roller in the roller width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001034309A JP4179758B2 (en) | 2001-02-09 | 2001-02-09 | Electrode manufacturing method and apparatus used in the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001034309A JP4179758B2 (en) | 2001-02-09 | 2001-02-09 | Electrode manufacturing method and apparatus used in the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002237298A true JP2002237298A (en) | 2002-08-23 |
| JP4179758B2 JP4179758B2 (en) | 2008-11-12 |
Family
ID=18897940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001034309A Expired - Lifetime JP4179758B2 (en) | 2001-02-09 | 2001-02-09 | Electrode manufacturing method and apparatus used in the method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4179758B2 (en) |
Cited By (7)
| 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 |
| JP2008251409A (en) * | 2007-03-30 | 2008-10-16 | Sanyo Electric Co Ltd | Electrode plate manufacturing method for battery and hopper for manufacturing electrode plate |
| JP2011233276A (en) * | 2010-04-26 | 2011-11-17 | Panasonic Corp | Method and apparatus for temperature equalization of heating roll |
| KR101416814B1 (en) * | 2012-12-31 | 2014-07-14 | 비나텍주식회사 | Electrolyte impregnation system, manufacturing system and manufacturing method of super capacitor thereof |
| WO2014164005A1 (en) * | 2013-03-11 | 2014-10-09 | Applied Materials, Inc. | Electrode surface roughness control for spray coating process for lithium ion battery |
| JP2020030930A (en) * | 2018-08-22 | 2020-02-27 | トヨタ自動車株式会社 | Roll press device |
| CN111386617A (en) * | 2018-10-25 | 2020-07-07 | 株式会社Lg化学 | Rolling device including step correcting member and rolling method using the same |
-
2001
- 2001-02-09 JP JP2001034309A patent/JP4179758B2/en not_active Expired - Lifetime
Cited By (9)
| 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 |
| JP2008251409A (en) * | 2007-03-30 | 2008-10-16 | Sanyo Electric Co Ltd | Electrode plate manufacturing method for battery and hopper for manufacturing electrode plate |
| JP2011233276A (en) * | 2010-04-26 | 2011-11-17 | Panasonic Corp | Method and apparatus for temperature equalization of heating roll |
| KR101416814B1 (en) * | 2012-12-31 | 2014-07-14 | 비나텍주식회사 | Electrolyte impregnation system, manufacturing system and manufacturing method of super capacitor thereof |
| WO2014164005A1 (en) * | 2013-03-11 | 2014-10-09 | Applied Materials, Inc. | Electrode surface roughness control for spray coating process for lithium ion battery |
| JP2020030930A (en) * | 2018-08-22 | 2020-02-27 | トヨタ自動車株式会社 | Roll press device |
| CN111386617A (en) * | 2018-10-25 | 2020-07-07 | 株式会社Lg化学 | Rolling device including step correcting member and rolling method using the same |
| US11552282B2 (en) | 2018-10-25 | 2023-01-10 | Lg Energy Solution, Ltd. | Roll press apparatus comprising stepped revision member and method for pressing using the same |
| CN111386617B (en) * | 2018-10-25 | 2023-06-02 | 株式会社Lg新能源 | Rolling apparatus including step correcting member and rolling method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4179758B2 (en) | 2008-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109326766B (en) | Method for manufacturing electrode sheet | |
| US6823584B2 (en) | Process for manufacturing a membrane electrode assembly | |
| JP5499537B2 (en) | Electrode manufacturing apparatus and electrode manufacturing method | |
| EP2815447B1 (en) | Reinforced metal foil electrode | |
| JP5359136B2 (en) | Electrode manufacturing method and electrode manufacturing apparatus | |
| JP6683165B2 (en) | Method for manufacturing all-solid-state battery | |
| JP2016119183A (en) | Electrode body and manufacturing method for cathode | |
| EP4075534A1 (en) | System and method for transferring electrode substrate from winding roll | |
| JP2002237298A (en) | Method of manufacturing electrode, and device used for the method | |
| KR101773728B1 (en) | Apparatus for manufacturing power storage device, and method for manufacturing power storage device | |
| JP2017212088A (en) | Method for manufacturing electrode body and method for manufacturing battery | |
| JP2014194882A (en) | Device and method for manufacturing lithium ion battery | |
| JP2005093236A (en) | Manufacturing method of sheet electrode | |
| JP4166973B2 (en) | PRESS DEVICE FOR PRODUCTION OF BATTERY ELECTRODE AND METHOD FOR PRODUCING BATTERY ELECTRODE | |
| JP2869156B2 (en) | Manufacturing method of positive electrode plate | |
| JP2001076711A (en) | Manufacture of sheet electrode | |
| EP2573840A1 (en) | Coating apparatus | |
| JP2010205429A (en) | Nonaqueous electrolyte secondary battery and electrode for the same | |
| JP2002270189A (en) | Manufacturing method for high polymer electrolyte type fuel cell and high polymer electrolyte type fuel cell using the same | |
| JP2001015144A (en) | Cell carbon plate for redox flow cell and cell structure | |
| JP6510304B2 (en) | Method of manufacturing lithium ion secondary battery | |
| JP2007273114A (en) | Method of manufacturing electrode for nonaqueous electrolyte secondary battery | |
| KR20170094642A (en) | Pressing Device Capable of Adjusting Space between Pressing Rolls | |
| JPH04249857A (en) | Manufacture of battery electrode plate | |
| JP2011216228A (en) | Electrode manufacturing device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050805 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080331 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080408 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080603 |
|
| 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: 20080729 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080826 |
|
| R151 | Written notification of patent or utility model registration |
Ref document number: 4179758 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110905 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120905 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130905 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| 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 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |