JPH03138856A - Lead-acid battery - Google Patents

Abstract

PURPOSE:To prevent the breakage of a strap root section due to the pendulum vibration of an electrode plate using the strap as a fulcrum and improve vibration resistance by folding the lug section of the electrode plate into multiple layers thicker than the thickness of the other lattice portion, and integrating the thickened lug section with the strap to form an electrode plate group. CONSTITUTION:A sheet section other than lug sections 1 is continuously expand- machined to form a lattice portion so that lug sections 1 are staggeringly faced together in turn in the width direction of a lead sheet, a pasty active material is filled in the lattice portion to form a belt-shaped electrode plate 3, and the lug section 1 is cut out from an unexpanded section to finish the independent electrode plate 3. The lug section 1 of the electrode plate 3 is folded into two to match the normal lug width. Multiple electrode plates 3 thus made are collected, lug sections of individual electrode plates 3 are welded to a strap 6 to form an electrode plate group. The breakage of the root section of the strap due to the pendulum vibration of the electrode plate 3 with the strap 6 as a fulcrum is prevented, and vibration resistance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a lead-acid battery, which has particularly improved earthquake resistance and is adaptable to a variety of uses.

In conventional lead-acid batteries, the positive and negative electrodes are generally assembled via a separator, and the ears are welded to a strap, and the electrode plates are housed in a battery case. It is completed by welding etc. In recent years, in such a structure, the separator has been made into a bag shape to streamline the handling of the electrode plate and to reduce the risk of short circuits due to falling objects.
In some cases, a configuration in which at least one of the negative electrodes is surrounded by a separator in a bag-like manner is adopted. This configuration has shown excellent reliability for ordinary vehicles traveling on flat roads. However, on the other hand, it is an off-road vehicle that enjoys rough roads.
Road vehicles and agricultural equipment.

When considering the expansion of applications such as power sources for starters in construction machinery, in reality, they are used as they are for general automobiles, which often causes unexpected problems.

Furthermore, from the standpoint of battery sales, it is difficult to sell batteries separately to different users for different uses, so there is a strong need for batteries that are suitable for multiple uses and have vibration resistance.

Problems that the invention aims to solve As a long-standing anti-vibration measure, in addition to increasing the insertion pressure of the electrode plate group, adhesives are used under the electrode group to fix the electrode group to the bottom of the battery case, etc. methods have been tried. However, it has been found that this adhesion method is substantially less effective in a configuration using bagged separators. The reason for this is that the failure phenomenon due to vibration is not due to the simple vertical and horizontal movement of the electrode plate, but rather the phenomenon in which the electrode plate swings like a pendulum using the strap that collects the current collecting ears of the electrode plate as a fulcrum. This is because the base of the ear strap weld is severely damaged. In other words,
As a result, even if the bottom of the electrode plate group is fixed, in the bag-shaped separator structure, the electrode plate is not fixed inside the separator bag.

The present invention provides a lead-acid battery with a condensation-resistant structure that allows the application of a highly productive method without losing the reliability of the bag-like separator and the ease of handling in a state where the electrode plates are wrapped. It is something to do.

Means for Solving the Problems As a specific means, in the present invention, the ears provided integrally with the expanded lattice are folded or folded into a plurality of parts, and the ears made thicker than the other lattice parts are used as straps. It is integrated with.

Effect: With the above configuration, the welding strength between the strap and the ear portion, which is thicker than the other parts, is improved, so a high resistance to pendulum-like movement using the strap as a fulcrum is obtained, and seismic strength is significantly improved.

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

FIG. 1 is a partially exploded view of the electrode plate manufacturing process according to the present invention. The sheet parts other than the ears are continuously expanded to form a lattice part, so that the two ears face each other in the width direction of the lead sheet material.
This lattice portion is filled with a paste-like active material to form connected strip-shaped electrode plates. Next, this strip-shaped electrode plate is cut into a predetermined size using a rotary cutter or a reciprocating cutter, and ears are cut out from the non-expanded portion to form individual independent electrode plates 3. During this process,
The continuous electrode plate is cut with the shape of the ear portion 1 made thicker than the predetermined width of the ear portion (formed in advance).At this time, a diagonally lined cut shoulder portion 4 is generated, and this chip 4 is usually a loss. Therefore, even if the shape of the ear part 1 is set as large as permissible in the width direction, basically there will be no change in material cost (in fact, it will increase the yield). In the subsequent process, the electrode plate 3 made in this way is folded into two by folding the ear part 1 into two as shown in FIG.
Adjust to the standard ear width. At this time, as a method of making the ear part 1 thicker than the other lattice parts, it is also possible to set the height of the ear part 1 large in advance and then fold it in the vertical direction.

The ear portion 1, which has become thicker due to folding, may be welded to the strap 6 in the folded state, but if this is done, the thickness may vary somewhat, so in the present invention, pressure is applied to the mating portion. were crimped together without any gaps. This close contact of the ears improves the electrical conductivity and the mechanical strength of the ears themselves. In addition, as a method for bringing the mating surfaces into close contact, welding around the ears or adhesion with a conductive adhesive may be considered.

FIG. 3 shows a state in which a plurality of electrode plates produced as described above are assembled and the ears 5 of each electrode plate 3 are welded to a strap 6 to form an electrode plate group. In this electrode group, strap 6
Naturally, the boundary area between the thick wall portion 5 and the thick wall portion 5 is larger than before, and the strength is also improved. Therefore, damage at the base of the strap 6 caused by pendulum vibration of the pole plate using the strap 6 as a fulcrum can be suppressed, and the seismic resistance 11 is significantly improved.

As an actual application example of the present invention, there is a method in which both the anode plate group and the cathode plate group have the above structure, and in some cases, a method in which a conventional bag-shaped separator is used to bond the bottom of the electrode plate group and the bottom of the battery case. The same effect can be obtained by means of fixing using an agent, and even by applying it to other electrode plates surrounded by a bag-like separator.

Effects of the Invention As described above, the present invention consists of making the electrode plate ears thicker than the other grid thicknesses and welding them to the strap to form the electrode plate group. The present invention aims to provide a lead-acid battery that has improved seismic resistance and reliability, and can be used in a wide range of applications other than general automobile applications.

[Brief explanation of the drawing]

Fig. 1 is a partial exploded view of the electrode plate manufacturing process according to an embodiment of the present invention, Fig. 2 is a diagram showing the state in which the tabs of the electrode plate according to the present invention are folded, and Fig. 3 is a diagram showing the electrode plates assembled together. FIG. 4, which shows a group of electrode plates welded to a strap, is a partial exploded view of a conventional electrode plate manufacturing process. 1... Ear part, 2... Lattice part, 3...
...Electrode plate, 4...Scrap, 5...Ear thick part, 6...Strap.

Claims (1)

[Claims] The expanded lattice is equipped with electrode plates filled with active material, and the tabs are folded into multiple layers and are thicker than the other lattice sections.This thick tab is integrated with the strap. Lead acid battery with.