JP2005026194A - Cylindrical sealed lead acid storage battery and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a cylindrical sealed lead acid storage battery which has slits in the paste paper at intervals according to changes in the diameter from the center of winding of the group of wound batteries. <P>SOLUTION: The group of wound batteries are constituted by winding a positive electrode plate 5 and a negative electrode plate 5 through a paste paper 2b as a separator. The electrode plates 5 have the paste paper 2b on the surface. Slits are applied on the paste paper 2b in the direction orthogonal to the winding direction. The intervals of the slits in the winding direction are made wider in the winding direction toward the circumference from the center of the wound battery group. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cylindrical sealed lead-acid battery and a method for manufacturing the same.

  A wound group, which is an electrode plate group of a cylindrical sealed lead-acid battery, has a structure in which a long positive electrode plate and a negative electrode plate are wound in a spiral shape with a separator interposed therebetween. When winding, a long and relatively soft electrode plate is handled, so it is important to prevent the active material from falling off. On the other hand, since the wound group has a structure in which a long electrode plate is wound, it is required to have a structure in which winding deviation is unlikely to occur.

For this reason, it has been proposed to use paste paper as a separator to be attached to the electrode plate, and to prevent the active material from falling off and to prevent winding slip by slitting the paste paper (for example, Patent Documents). 1). Thereby, winding deviation can be prevented.
JP 2002-158030 A

  However, when winding is performed at high speed, the paste paper affixed to the electrode plate is irregularly broken, so that there is a problem that a sufficient winding prevention effect cannot be obtained. Further, when slit processing is performed on paste paper that has been rolled up in order to perform slit processing on the paste paper, there is a problem that the slit interval cannot be defined. Furthermore, when the slit processing is performed on the paste paper after being attached to the electrode plate, there is a problem that the electrode plate is damaged.

  An object of the present invention is to provide a cylindrical sealed lead-acid battery in which slits are provided in paste paper at intervals corresponding to changes in diameter from the winding center of a winding group.

  Another object of the present invention is to provide a method for manufacturing a cylindrical sealed lead-acid battery capable of inserting slits in paste paper at a required interval.

  The present invention has been made to achieve the above object.

  The present invention is directed to a cylindrical sealed lead-acid battery having a wound group in which a positive electrode plate and a negative electrode plate are wound through a separator.

  In the cylindrical sealed lead-acid battery according to the present invention, the electrode plate has paste paper on the surface thereof, and the paste paper has slits in a direction perpendicular to the winding direction, and the interval between the slits is small. It is characterized by becoming wider from the center of the rotation group toward the outer periphery.

  Moreover, in the manufacturing method of the cylindrical sealed lead-acid battery according to the present invention, the paste paper is attached to the surface of the electrode plate along the surface of the roll disposed above and below the electrode plate, and the paste paper passes through the surface of the roll. In this case, the paste paper is slitted at a required interval.

  In this case, the interval in the winding direction of the slit is increased in the winding direction from the center of the wound group formed by winding the positive electrode plate and the negative electrode plate through paste paper toward the outer periphery.

  In the cylindrical sealed lead-acid battery according to the present invention, the interval in the winding direction of the slit provided in the direction perpendicular to the winding direction on the paste paper existing on the surface of the electrode plate is determined from the center of the winding group. In other words, since the gap in the winding direction of the slit is narrowed in the winding direction toward the center of the winding group, in the center of the winding group. Since the degree of curvature of the electrode plate is large, by making the slit distance of the paste paper smaller than the outer periphery of the winding group in this way, the paste paper can easily follow the electrode plate and bend, and the winding can be stably prevented. Can be prevented.

  Moreover, in the manufacturing method of the cylindrical sealed lead-acid battery according to the present invention, the paste paper is attached to the surface of the electrode plate along the surface of the roll disposed above and below the electrode plate, and the paste paper passes through the surface of the roll. When the paste paper is slit at the required interval, slitting is performed immediately before the paste paper wound up in a roll is pulled out and pasted to the electrode plate, and thus the electrode plate is damaged. In addition, slit processing can be performed at a predetermined position corresponding to the electrode plate length.

  In this case, if the gap in the winding direction of the slit is widened in the winding direction from the center of the wound group formed by winding the positive electrode plate and the negative electrode plate through paste paper in the winding direction, winding deviation is prevented. can do.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  Using a lead alloy foil having a thickness of 0.7 mm, an electrode plate base having a width of 80 mm and a length of 600 mm was punched to produce a current collector made of a lattice.

  Next, an electrode was produced using this current collector. The positive electrode plate was formed by kneading lead powder having an oxidation degree of 70% and dilute sulfuric acid to obtain an active material paste, and filling the active material paste into a current collector. The negative electrode plate is formed by adding a small amount of carbon powder, lignin, barium, and a compound to lead powder with an oxidation degree of 70%, kneading with dilute sulfuric acid to obtain an active material paste, and filling the current collector with this active material paste did.

これらの構造の捲回群（１），（２）を２秒／個の速度でそれぞれ１００個作製し、各捲回群の長径と短径の比率（＝長径／短径）を測定した。その結果を表２に示す。

従来例は比率１．０１の捲回群が半数以上を占めるものの、１．０４以上の捲回群が６個発生した。これに対し、本発明の捲回群は１．０４以上のものは発生せず、巻ずれが抑制されている。 Next, paste paper is pasted on the surface of each electrode plate, and the positive electrode plate and the negative electrode plate with the paste paper as a separator are wound through a glass mat separator to form a wound group as shown in Table 1. Was made. Here, the wound group (1) is a conventional example, and the wound group (2) is an example of the present invention.

100 wound groups (1) and (2) having these structures were respectively produced at a rate of 2 seconds / piece, and the ratio of the major axis to the minor axis (= major axis / minor axis) of each wound group was measured. The results are shown in Table 2.

In the conventional example, the winding group with a ratio of 1.01 accounts for more than half, but six winding groups with a ratio of 1.04 or more occurred. On the other hand, no winding group of 1.04 or more is generated in the winding group of the present invention, and winding deviation is suppressed.

  FIG. 1 is a perspective view showing a slit machining method, and FIG. 2 is a plan view of a slit paste paper. In these figures, 1 is a pair of paste paper rolls arranged up and down, 2a is a pair of paste papers fed from a pair of paste paper rolls 1, and 3 is a pair of paste papers arranged up and down. Conveying rolls, 4 is a pair of cutters arranged up and down, 5 is an electrode plate, 2b is a paste paper containing slits 6 affixed on both surfaces of the electrode plate 5.

  In this example, each paste paper 2a is supplied from a pair of paste paper rolls 2 arranged above and below to a pair of paste paper conveyance rolls 3 arranged above and below and pulled out. Each paste paper 2 a is U-turned along the surface of each paste paper transporting roll 3 and pasted on both surfaces of the electrode plate 5. When each paste paper 2a passes through the surface of each paste paper transport roll 3, each cutter 4 is operated by a driving means (not shown), and the transport direction which is the winding direction of the wound group on each paste paper 2a. Slits 6 are applied in the orthogonal direction. The slit 6 widens the interval in the winding direction in the winding direction from the center of the wound group toward the outer periphery. In other words, the slit 6 narrows the interval in the winding direction in the winding direction toward the center of the winding group.

  If the slit 6 is provided in the paste paper 2a, even if it winds through the electrode plate 5, the tension | tensile_strength accompanying winding is absorbed by the opening of the slit 6, and generation | occurrence | production of winding deviation can be prevented.

  Thereby, by the roll speed | rate synchronized with the electrode plate conveyance speed and cutter operation, the slit process can be stabilized and the thing of the same quality which prevented winding slippage can be produced.

It is a perspective view which shows an example of the slit processing method. It is a top view which shows an example of the paste paper with a slit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paste paper roll 2a Paste paper supplied from paste paper roll 2b Paste paper with slit 3 Paste paper transport roll 4 Cutter 5 Electrode plate 6 Slit

Claims (3)

In a cylindrical sealed lead-acid battery having a winding group in which a positive electrode plate and a negative electrode plate are wound through paste paper as a separator,
The electrode plate has the paste paper on a surface thereof, and the paste paper is slit in a direction perpendicular to the winding direction, and the interval in the winding direction of the slit is the center of the winding group. A cylindrical sealed lead-acid battery characterized in that it is widened in the winding direction from the outer periphery toward the outer periphery. A paste paper as a separator is pasted on the surface of the electrode plate along the surface of the roll arranged above and below the electrode plate, and the paste paper is slit at a required interval when the paste paper passes through the surface of the roll. A method of manufacturing a cylindrical sealed lead-acid battery, characterized by performing processing. The gap in the winding direction of the slit is widened in the winding direction from the center of the wound group formed by winding the positive electrode plate and the negative electrode plate through the paste paper toward the outer periphery. Item 3. A method for producing a cylindrical sealed lead-acid battery according to Item 2.

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