JP2002358955A - Cylindrical lead acid storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical lead acid storage battery in which the problem of the conventional battery is eliminated and has a stable performance by making small the fluctuation of the electrode plate thickness, while making constant the filling thickness of the active substance paste. SOLUTION: In the cylindrical lead acid storage battery, the thickness of the upper frame and the lower frame at the both side ends of the band-shape electrode plate grid is formed thicker than the lattice portions and the active substance paste is filled between the upper frame and the lower frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cylindrical lead-acid battery.

[0002]

2. Description of the Related Art As shown in FIG. 3, a cylindrical lead-acid battery has a wound power generating element 4 in which a strip-shaped positive electrode plate 1 and a strip-shaped negative electrode plate 2 are wound into a cylindrical shape via a strip-shaped separator 3. Used.
For the positive electrode plate 1 and the negative electrode plate 2, a continuous grid such as a punched grid or an expanded grid as shown in FIG. 4 or a continuous cast grid is used. Is filled. Lead grid 5
In consideration of the winding property, a soft alloy such as pure lead or a lead-tin alloy is used. The grid 5a is formed by punching or expanding a strip-shaped lead sheet.
Alternatively, it is an opening formed by a continuous casting method. The cells are designed so that the active material can be filled as much as possible. Each of the lead grids 5 has a lug 5b protruding from the upper end thereof. The lug 5b is wound around the positive electrode plate 1 and the negative electrode plate 2 so as to project from the upper end surface of the power generation element 4 and collected by a strap (not shown). Electricity can be supplied.

[0003]

When a strip-shaped electrode plate is manufactured by filling a paste-like active material into a lead grid sheet as shown in FIG. 4, it is not easy to form a uniform filling thickness. , Some variation in electrode plate thickness is inevitable,
It becomes difficult to make the diameter of the wound power generating element wound in a cylindrical shape uniform. As a result, variations in battery characteristics increase,
There has been a problem that the position of the ear for current collection is shifted, and it may be difficult to collect current by forming a strap.

The present invention has been made in order to cope with such a situation, and the upper and lower foreheads of both ends of the strip-shaped electrode plate grid are formed to be thicker than the thickness of the bar, and the active material paste is formed. It is filled only between the upper and lower foreheads. In addition, the active material paste is filled so as to have an upper or lower forehead thickness, reducing variations in electrode plate thickness and eliminating the problems of conventional batteries. It is intended to provide.

[0005]

According to the first aspect of the present invention,
The upper and lower foreheads of both sides of the strip-shaped electrode grid are formed to be thicker than the thickness of the crosspiece, and a strip-shaped electrode plate filled with an active material paste between the upper and lower foreheads is used. A cylindrical lead-acid battery.

According to a second aspect of the present invention, in the cylindrical lead-acid battery according to the first aspect, the filling thickness of the active material paste is set to the upper or lower thickness.

[0007]

According to the first aspect of the present invention, the upper and lower foreheads of both ends of the strip-shaped plate grid are formed thicker than the thickness of the bar portion, and the active material paste is applied to the upper and lower foreheads. And filling between them. By doing so, the thickness of the electrode plate can be made substantially constant to the thickness of the upper or lower forehead, and the variation in the diameter of the power generating element and the position of the ear when the electrode plate is wound into a cylindrical shape. Displacement is reduced, and a cylindrical lead-acid battery with stable performance is obtained.

According to a second aspect of the present invention, in the cylindrical lead-acid battery according to the first aspect, the filling thickness of the active material paste is set to an upper or lower thickness. Since the active material paste can be filled based on the thicknesses of the upper and lower foreheads at both ends of the strip-shaped electrode, an electrode having a substantially constant thickness can be obtained, and the conventional problems can be solved.

[0009]

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

FIG. 1 shows an embodiment of the present invention and is an enlarged view of a main part of a lead grid used in a cylindrical lead-acid battery of the present invention. Components having the same functions as those of the conventional example shown in FIGS. 3 and 4 are denoted by the same reference numerals. In the figure, reference numeral 5 denotes a strip-shaped lead grid produced by a continuous casting method, and upper and lower foreheads 5c and 5d are formed on both side ends of the lead grid 5, and ears 5b project from the upper forehead 5c. Structure.
5a is a formed square, 5e and 5f are a vertical bar and a horizontal bar formed by casting. The upper forehead 5c and the lower forehead 5d are formed to have a substantially constant thickness which is thicker than the vertical bar 5e and the horizontal bar 5f.

Next, the forehead 5 of the manufactured strip-shaped lead grid is used.
The positive and negative active material pastes 6 were filled between c and the lower forehead 5d so as to have the same constant thickness as the upper and lower foreheads, respectively, thereby producing belt-like positive and negative electrode plates. FIG. 2 is a schematic view showing an example of a cross-sectional shape in the width direction of a strip-shaped electrode plate used in the cylindrical lead-acid battery of the present invention.

The strip-shaped positive electrode plate 1 and the strip-shaped negative electrode plate 2 are wound into a cylindrical shape through a strip-shaped separator 3 to produce a wound-shaped power generating element 4 which is housed in a cylindrical container and placed in a cylindrical lead. A storage battery was manufactured.

More specifically, the above embodiment will be described in terms of its shape, size, capacity, and the like. As the strip-shaped lead grid 5, the upper forehead 5c and the lower forehead 5d have a thickness of 0.9 mm and a vertical rail. 5e
And the thickness of the horizontal rail 5f is 0.6 mm, and the outer dimensions are 90 mm x
A positive and negative active material paste 6 is filled into each of the positive and negative active material pastes 6 to produce a strip-shaped positive and negative electrode plate. Then, these strip-shaped positive and negative electrode plates 1 and 2 are separated into a strip-shaped separator 3. A power generation element 4 having a wound shape is manufactured by winding the power generation element 4 into a cylindrical shape, and a strap and a current collecting terminal are welded to the ear 5b of the power generation element 4 and stored in a cylindrical container having an inner diameter of 45.0 mm. A 10 Ah cylindrical lead storage battery was prepared by injecting and forming a liquid.

In the cylindrical lead-acid storage battery of the present invention, the positional deviation of the ears and the variation in the diameter of the power generating element are within an allowable range, and a cylindrical lead-acid storage battery having a stable performance and solving the problems of the conventional battery is obtained.

In the above embodiment, the case where a strip-shaped lead grid manufactured by a continuous casting method is used has been described. However, even if a punched grid or an expanded grid is used, the structure of the strip-shaped lead grid of the present invention can be obtained. If so, its production method does not matter.

[0016]

As is apparent from the above description, according to the present invention, the thickness of the electrode plate can be defined on the basis of the thickness of the upper and lower foreheads. Obtained
As a result, the diameters of the power generation elements and the positions of the ears are uniform, the defective rate is reduced, and a cylindrical lead-acid battery having stable performance is obtained, which is of great industrial value.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a main part showing an example of a lead grid used in a cylindrical lead-acid battery of the present invention.

FIG. 2 is a schematic view showing an example of a cross-sectional shape in the width direction of a strip-shaped electrode plate used in the cylindrical lead-acid battery of the present invention.

FIG. 3 is an exploded perspective view showing the structure of a power generating element of the cylindrical lead-acid battery.

FIG. 4 is a developed plan view of a lead grid used for a positive electrode plate and a negative electrode plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Positive electrode plate 2 Negative electrode plate 3 Separator 4 Power generation element 5 Lead grid 5a grid 5b ear 5c Upper 5d Lower 5e Vertical bar 5f Horizontal bar 6 Active material paste

Claims (2)

[Claims] 1. An upper material and a lower material of both sides of a strip-shaped electrode grid are formed to be thicker than a thickness of a bar portion, and an active material paste is filled between the upper material and the lower material. A cylindrical lead-acid battery using a strip-shaped electrode plate. 2. The cylindrical lead-acid battery according to claim 1, wherein the filling thickness of the active material paste is the upper or lower thickness.