JP2943339B2 - Manufacturing equipment for bag-shaped separators for storage batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag made by laminating a microporous plastic film made of polyethylene or the like and a smooth surface and a glass fiber mat, bending both at right angles to the longitudinal direction, and joining both sides. The present invention relates to an apparatus for manufacturing a bag-shaped separator for a storage battery that provides a separator enclosing an electrode plate such as a positive electrode or a negative electrode.

[0002]

2. Description of the Related Art In order to improve the service life of a storage battery, a positive or negative electrode plate is inserted into a bag-shaped separator to form a storage battery. This bag-shaped separator is a microporous plastic film made of polyethylene or the like, and a plastic film with a smooth surface and a glass fiber mat are overlapped and simultaneously bent at right angles to the longitudinal direction, and both sides are joined to form a bag-shaped separator. Is commonly used.

A specific example will be described with reference to FIG. In FIG. 3, a polyethylene film 1 whose one end is wound in a roll shape is supplied onto a conveyor 3 in synchronization with a glass fiber mat 2 whose end portion is also wound in a roll shape, and the polyethylene film 1 and the glass fiber mat 2 are conveyed. The two are pulled downward by a feed roller 4 which is superimposed on 3 and arranged vertically. In this apparatus, since the polyethylene film 1 has a small frictional resistance, if the polyethylene film 1 is shifted on the conveyor 3 in the lateral direction of the conveyor 3 with respect to the glass fiber mat 2, the polyethylene film 1 is superposed on the glass fiber mat 2 in a meandering manner. When the polyethylene film 1 is displaced from the glass fiber mat 2 in the traveling direction of the conveyor 3, the polyethylene film 1 becomes stepwise at various places and overlaps the glass fiber mat 2. Therefore, it has been difficult to supply a separator in which a plastic film having low frictional resistance and a glass fiber mat are accurately overlapped with each other without displacement. 3 in FIG.
Denotes a cutter roller having a cutter blade 5a, and 6 denotes a still roller provided to face the cutter roller 5. Numeral 7 denotes a joining roller for joining both sides of the polyethylene film 1 and the glass fiber mat 2. The electrode plate 8 of the storage battery advances in the direction A in the figure by the conveyor 9 to overlap the polyethylene film 1 and the glass fiber mat 2. Coalescing 1
0 is bent in the direction of the conveyor 11 so that the top and bottom of the electrode plate 8 are wrapped by the polymer 10 so that the polymer 10 is
Are bonded to each other, and the electrode plate 8 is included in the bag-shaped separator.

[0004]

It is difficult to accurately overlap the above-mentioned microporous plastic film having a smooth surface with a glass fiber mat, and if the plastic film and the glass fiber mat are mutually displaced in the lateral direction. If the plastic film overlaps the glass fiber mat in a meandering manner, or if the plastic film slides in the longitudinal direction with respect to the glass fiber mat, the two will overlap in a stepwise manner, and eventually the plastic film and the glass fiber mat with low frictional resistance will be separated. It has been difficult to realize a manufacturing apparatus that accurately overlaps.

[0005]

In order to solve the above-mentioned problems, the present invention provides a plastic film and a glass fiber mat on separate conveyors, both of which are supplied to a double-side joining apparatus in synchronization with each other. Provided is a bag-shaped separator manufacturing device that combines and supplies both to a double-side joining device through a device that separately applies a pulling force to the glass fiber mat, and accurately polymerizes the plastic film and the glass fiber mat and joins with the double-side joining device. Is what you do.

[0006]

[Action] By supplying plastic film and glass fiber mat in separate conveyor, both can be polymerized without mutual sliding, also supplied both separately tension feed roller by pressure <br/> e Rukoto The electrodes can be accurately overlapped with each other without being excessively stuck, and the electrodes can be stably packaged.

[0007]

An embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a polyethylene film, a glass fiber mat 2 and separate conveyors 12 and 13, respectively.
, And are superposed on each other and supplied between the feed rollers 14 and 14. 15 is a cutter blade 15a
The cutter roller is provided with the cutter roller and faces the still roller 16. Reference numeral 17 denotes a joining roller which joins both sides of the polyethylene film 1 and the glass fiber mat 2, and the electrode plate 18 of the storage battery is fed by a conveyor 19 to feed a polymer 20 of the polyethylene film 1 and the glass fiber mat 2 toward the conveyor 21. It folds the electrode plate 18 and joins both sides at the same time.

FIG. 2 shows another embodiment, in which a tension roller 22 is provided between the feed rollers 14,14. These books
A bag-shaped separator according to the embodiment shown in FIGS. 1 and 2 of the invention.
Separator according to the data production equipment and the comparative example shown in FIG.
A bag-shaped separator was prepared using the data. Bag shape created
Polyethylene film and glass fiber
If the units are shifted from each other in the horizontal direction,
The polyethylene film is longer than the glass fiber mat
The deviation in the direction is referred to as a step deviation defect.
The rate was measured.

[0010]

[Table 1]

Table 1 shows the occurrence rates of these defects as percentages.
It is shown. In the conventional comparative example shown in FIG.
70% and 50% of lateral and step deviations, respectively
Alive. Next, in the embodiment of the present invention shown in FIG.
Therefore, the occurrence rate of the step deviation defect is 50%, but the lateral deviation defect
Was 0%. This is a polyethylene film
And glass fiber mat are supplied separately,
This is because polymerization could be performed without slipping. Further in FIG.
In the illustrated embodiment of the present invention, a lateral shift defect and a step shift
The incidence of defects was 0%. This is tension roller 2
2 、 Polyethylene film, glass fiber mat
The tension can be applied to both of them separately.
Because both could be polymerized accurately without feeding too much to 4,
It is. Table 2 shows the separator according to the conventional comparative example shown in FIG.
Of the separator according to the invention of FIGS. 1 and 2
Is cut into 10mm width and the joint is separated with a tension gauge
The bond strength pulled in the direction was indicated. Conventional as shown in FIG.
The bonding strength of the separator according to Comparative Example is 0 to 350 gf.
However, the separator according to the present invention is 600 to 1000
gf and stable and sufficient bonding strength.

[0012]

[Table 2]

[0013]

As shown in the above embodiment, in the separator according to the present invention, the plastic film of polyethylene or the like and the glass fiber mat are separately conveyed from the material roller to the feed roller and polymerized. It is excellent for producing a bag-shaped separator without deviation in both the direction and the vertical direction. Further, by installing the tension roller in front of the feeding roller, the quality can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing the concept of an apparatus for manufacturing a bag-shaped separator for a storage battery according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of another embodiment.

FIG. 3 is a schematic sectional view showing a conventional comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Polyethylene film 2 Glass fiber mat 3,12,13 Conveyor 4,14 Feeding roller 22 Tension roller

Continuation of the front page (72) Inventor Masayoshi Yuki 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-55-72363 (JP, A) JP-A-53-36642 (JP) , A) (58) Field surveyed (Int. Cl. ⁶ , DB name) H01M 2/16 B32B 17/02

Claims (2)

(57) [Claims] 1. A device for feeding a microporous and smooth-surface plastic film and a glass fiber mat to a feed roller for polymerizing the two separately on a conveyor synchronized in speed, and the above-mentioned polymerized both sides. An apparatus for manufacturing a bag-shaped separator for a storage battery provided with a joining device for joining. 2. The apparatus for manufacturing a bag-shaped separator for a storage battery according to claim 1, further comprising a tension roller for separately applying tension to the plastic film and the glass fiber mat before supplying the plastic film and the glass fiber mat to the feed roller.