JP4931344B2 - Connected grid substrate for lead-acid battery - Google Patents

Description

The present invention relates to a lattice substrate for a lead storage battery that can simultaneously obtain a plurality of lattice substrates.

For example, a lead-acid battery used for starting an automobile is manufactured by storing a group of electrode plates composed of a large number of electrode plates and a large amount of electrolyte in a battery case. The electrode plate used is obtained by applying and filling a paste-form active material on a lattice substrate, and this lattice substrate is a lattice-shaped central bone portion, a frame bone surrounding the outer portion, and an ear portion protruding from the frame bone, Further, if necessary, the frame bone formed with the ear portion is composed of a foot portion formed to protrude from the opposite frame bone. The lattice substrate is obtained, for example, by casting a molten lead alloy.

These lattice substrates are not cast one by one, but may be obtained by casting a plurality of two or more at a time in a state where they are connected to each other at the ears. (Patent Document 1)

Japanese Patent Laid-Open No. 2-192659

These connected lattice substrates connected to each other are not cut into one piece immediately after casting, but are transported as they are and when they are transported to the process of filling the paste-like active material, the subsequent drying / aging process, etc. Finally, a relatively wide suspension throwing ear called a cutting ear to be cut and removed is integrally cast on a portion located at the uppermost outermost end of the connecting grid substrate. Engage and suspend the connected grid substrate to carry it, or hang it on the frame of the suspension shelf and mature it. As shown in FIG. 2, the ears 23 of one grid substrate 2 are connected to the lattice substrate. In the case of the inner ear lattice substrate formed in the middle instead of one end of the second frame bone 22, it may be deformed as shown by the dotted line due to its own weight when suspended by the suspension throwing ear 11. The deformed connected grid substrate is used after being cut into a predetermined size in the final process, but cannot be cut into a predetermined shape at that time, and the length of the ear part varies, and there is no frame bone. There is a problem that in-process defects occur, such as in manufacturing.

  The present invention solves the above-described conventional problems, and the attachment position of the upper end of the suspension ear for suspension is formed to be the same as or lower than the attachment position of the upper end of the ear part of one lattice substrate. It is a thing.

  Accordingly, it is considered that even when the suspension is suspended, it is possible to resist the force that the connecting grid substrate is deformed by the ear portion even by the upward stress applied to the hanging discarding ear, and the deformation can be prevented.

Even if the connection grid substrate is suspended by engaging the suspension tab for suspension of the connection grid substrate, the connection grid substrate is less deformed and can be correctly cut into a predetermined shape at the time of cutting, thereby reducing defects in the process. There are effects such as being able to.

FIG. 1 is a diagram showing an embodiment of the present invention. Reference numeral 1 denotes a connected grid substrate, and the connected grid substrate 1 is cast in a form in which a portion surrounded by a square dotted line a is a single inner ear lattice substrate 2 and a plurality of inner ear lattice substrates 2 are connected. This inner ear lattice substrate 2 has a middle bone portion 21 in which a large number of vertical and horizontal bones are arranged in a grid, four slightly thick frame bones 22 surrounding the rectangle in a square shape, and from one side of the frame bone 22 to one end thereof. It is comprised from the ear | edge part 23 which protrudes from the middle rather than . These inner ear lattice substrates 2 are connected to each other by their ear portions 23, and at least have a state of being connected by the ear portions 23, and are connected between the sides of the opposing frame bones of the adjacent inner ear lattice substrates 2. In addition, 3 is a connection part connected between the sides of this frame bone.

The suspension throwing ears 11 are integrally cast so as to protrude from the frame bone 22 of the inner ear lattice substrate located on both outermost sides of the connection lattice substrate 1. Further, the upper end position 12 at which the suspension throwing ear 11 protrudes from the frame bone 22 is the same as or equal to the upper end position 24 of the ear portion 23 at which the unit lattice substrate 2 is connected to each other. It is designed to be positioned at a lower level.

In the example of FIG. 1, eight inner ear lattice substrates 2 are integrally cast, and two sets of inner ear lattice substrates 2 connected to each other at their ears 23 are adjacent to each other in the left and right sides. A combination of two stages in which one side is connected by the connecting part 3, each side of the adjacent frame bones 22 of each stage is connected by the connecting part 3, and a hanging ear for suspension is attached to one side of the frame bone 22 located at both extreme ends. 11 is integrally formed to constitute the connected grid substrate 1. In this case, the position 12 of the upper end where the suspension ear 11 protrudes from the frame bone 22 is the same as the position 24 of the ear 23 where the ear 23 where the inner ear lattice substrate 2 is connected to each other protrudes from the frame bone 22. The height or the same.

Such a connected grid substrate can be easily obtained by, for example, a book mold casting method in which a molten lead alloy is poured into a space formed by abutting a movable mold and a fixed mold each having a digging of these shapes. .

300 connected grid substrates thus obtained are poured into the process, filled with a paste-like active material, dried and matured, etc., and the hanging ears are suspended on a transportation chain or frame, and then a cutting process. Thus, the inner ear lattice substrate 2 is obtained by cutting and removing the suspension ears and the connecting portions, and the dimensions of each electrode plate (lattice substrate filled with active material) are measured in detail. Compared to the case where a hanging ear for suspension is formed on the uppermost part of the substrate, the deformation amount of the electrode plate, that is, the length of the ear part is not a predetermined length, the frame bone is not square, the frame bone is thinned, or As a result, the amount of deviation from the predetermined size was reduced by about 60%, and the defect rate in the electrode plate process was reduced by about 70%.

The same effect was obtained even when the upper end position of the hanging ear for suspension was positioned lower than the upper end position of the ear.

Further, in the above-described connected grid substrate, the upper end position 12 at which the suspension throwing ear 11 protrudes from the frame bone 22 is located at the ear portion 23 at which the inner ear lattice substrate 2 is connected to each other. Although it is the same as the upper end position 24, if at least one of the longitudinal bone or the transverse bone of the middle bone portion is positioned at this position as shown in FIG.

The connection lattice board | substrate explaining embodiment of this invention. A connected grid substrate with hanging ears for suspension.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection grid board | substrate 11 Suspension ear 12 Suspension ear upper end position 2 Inner ear lattice board 21 Middle lattice 22 Frame 23 Ear part 24 Above upper end position of ear part

Claims (1)

A lead-acid battery having at least a state of being connected to each other at the ears of an inner ear lattice substrate having a frame bone and having an ear part protruding from the middle rather than one end of the frame bone. In the connecting grid substrate for use, the upper end position of the suspension ear formed integrally with the connected grid substrate is formed to be the same as or lower than the upper end position of the ear portion where the inner ear lattice substrates are connected to each other. A connected grid substrate for a lead-acid battery.