JPS58175268A - Manufacture of cylindrical lead storage battery - Google Patents

Abstract

PURPOSE:To enable lead bodies to be located accurately in desired positions in a lead storage battery, in which expanded lead plates are rolled in a spiral form, by providing said lead bodies after the positive and the negative plates are rolled into the spiral form, with a separator interposed betweem them. CONSTITUTION:As indicated in Figures A, B and C, unnecessary parts of the upper end of the plain part 1 of a spirally rolled electrode plate group is cut and removed so that only parts of the plates serving as lead bodies 1' are left. Since a positive lead plate (A) and a negative lead plate (B) are positioned at an interval corresponding to the thickness of a separator, the parts which are to become lead bodies and represented by the symbols 1' in the figure, as they are, cannot be made to work as lead bodies. Therefore, either the lead body of each plain part of the negative plate (B) located between plain parts of the positive plate (A), or the lead body of each plain part of the positive plate (A) located between plain parts of the negative plate (B) is partially cut and removed so as to provide a stage difference.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cylindrical lead-acid battery using a continuous series of expanded lead electrode plates wound in a spiral shape.

In a lead-acid battery that uses an expanded lead electrode plate wound in a spiral shape, the portion that is to become the lead body of the expanded electrode plate is formed, and then the positive electrode plate and the negative electrode plate are wrapped in a thin spiral shape with a separator interposed between them. It is wrapped around. In this case, as shown in FIG. 4, a plurality of lead bodies 1' are formed from the uncoated portion 1 of one positive electrode plate or negative electrode plate, and the more lead bodies there are, the more the positive electrode plate and the negative electrode are formed. If the lead body parts are wound together with a separator interposed therebetween, it becomes extremely difficult to fix the plurality of lead body parts in predetermined positions. This is a phenomenon that becomes noticeable when an elongated strip-shaped electrode plate is wound many times with a separator in between, due to subtle changes in the thickness of the electrode plate or separator.

The present invention proposes a method for easily forming a lead body on an expanded lead electrode plate in a lead acid battery using an expanded lead electrode plate wound in a spiral shape.

In the present invention, so-called expanded lead electrode plates are used as the positive electrode plate and the negative electrode plate. This expanded lead electrode plate has a plain area (unprocessed area) 1 as shown in Fig. 1, for example.
An expanded type grid body having mesh-like processed parts 2 and 3 is prepared, and lead pastes 2' and 3 are applied to the mesh-like processed parts 2 and 3.
' is coated and cut along the center line 4 of the plain area 1 shown in FIG. 2 to form the band shape shown in FIG. 3. The positive electrode B and the negative electrode B of the band-shaped expanded lead electrode plate whose longitudinal edges are uncoated are connected to a mat-like seven-layer plate made of, for example, ultra-fine glass fibers. They are overlapped with each other via S and wound into a thin spiral as shown in FIG.

Next, as shown in FIGS. 6, B, and C, the uncoated portion 1 of the thinly wound electrode plate group is removed, leaving only the part where the lead body 1' of the electrode plate is large. Cut off the unnecessary part of the upper end of 1.

In Fig. 6, the lead body indicated by 1' is made up of positive and negative lead plates that are alternately stacked on top of each other with an interval equal to the thickness of the separator. unable to fulfill its role.

Therefore, for example, as shown in Figure 7, B and C,
Partially cut and remove the lead body of the plain part of the negative electrode plate B that is sandwiched between the plain part of the positive electrode plate B, or the lead body of the plain part of the positive electrode plate that is sandwiched between the plain part of the negative electrode plate B. Create a step.

Finally, as shown in FIG. 8, for example, the lead pole post 6 is connected to the lead body 1' of one pole, and the pole post 6 is connected to the uncoated part from which the lead body 1' of the other pole has been removed. Complete the removal of the lead body as a group of electrode plates.

In addition, in the above explanation, the positive electrode plate and the negative electrode plate are wound in a thin spiral shape, and the plain parts located at the ends of each electrode plate are wound in a straight line as shown by the chain line in Figure 9. The case where the strip is cut leaving a band-shaped part is shown. However, the shape of cutting the lead plate portion at the end of the electrode plate is not limited to the human shape shown in Figure 9. For example, the part surrounded by the chain line in Figure 9B or Figure 9C may be left in a band shape and other shapes may be cut. It is possible to cut and remove parts. Furthermore, if it is carried out in the form shown in Fig. 9B or Fia, a large number of leads can be taken out from the electrode plate, so it is effective when the number of turns of the electrode plate is large or when discharging a large current. big.

The method of forming the lead body in B or C of FIG. 9 may be basically the same as the method of forming the lead body in M of FIG. 9, and it is sufficient to connect the glue bodies of the same polarity at one place.

The cylindrical electrode plate assembly thus completed is inserted into a sulfuric acid-resistant cell, and a predetermined amount of dilute sulfuric acid is injected into it, allowing it to function as a lead-acid battery.

Next, the effects of the present invention will be explained.

Conventionally, a positive electrode plate and a negative electrode plate processed into the shape shown in Figure 4 were stacked on top of each other with a separator interposed between them, and then wound in a thin spiral. Since the thickness is not completely uniform, it is extremely difficult to accurately position the plurality of lead bodies 1' at predetermined locations.

However, in the present invention, the lead body is formed after the positive electrode plate and the negative electrode plate are wound thinly through a separator, so unlike the conventional example, the lead body can be easily and precisely placed at the desired position. It becomes possible to do so.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the lattice body used in the expanded type electrode plate;
Figure 2 shows a hydraulic spunt type electrode plate with lead paste coated on the same grid, Figure 3 shows a strip-shaped electrode plate cut by cutting the same electrode plate at the plain part, and Figure 4 shows FIG. 6 is a top view of a group of thinly wound electrode plates according to an embodiment of the present invention. A top view of a lead body formed on the plain part of a group of electrode plates wound in a shape, B is a schematic vertical cross-sectional view of the same, C is a side view of the same, and Fig. 7 shows either the positive or negative electrode of the group of electrode plates. A top view with one lead body removed; B is a schematic vertical cross-sectional view;
4C is a side view of the same, FIG. 8 is a schematic cross-sectional view of the lead body and pole post welded to the plain part of the electrode plate, and Figures 9, B, and C are views of the lead body formed by cutting and removing the plain part of the electrode plate. It is a schematic diagram showing the shape. 1... Plain part (unprocessed part), 2.3...
・Mesh processing part, 2', 3'...lead paste,
M...Positive plate, B...Negative plate, S...
・・・Se・(Rator, 1′・・・Lead body, 6
,6...Polar pillar. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure? vAz Figure 2 Figure 3? 2' Fig. 4 Fig. 5 WA Fig. 6, 9 Fig. 7 Fig. 8 f Fig. 9 320

Claims (1)

[Claims] The edges along the length of the lead plate are left plain, the other parts are processed into a mesh shape, and the expanded positive and negative electrode plates are coated with lead paste and are rolled into a thin spiral shape with a separator interposed between them. A method for manufacturing a cylindrical lead-acid battery, which comprises, after winding, leaving a portion of the uncoated portion to serve as a lead body and cutting and removing the other portion.