JPS5946774A - Battery - Google Patents

Abstract

PURPOSE:To prevent early drop of capacity when increasing the capacity, by employing a plate where the height of the active substance section is higher than specific level while providing the lug portion at the height lower than specific level. CONSTITUTION:The positive plate 2 and negative plate are made such that the height (H) of the active substance portion is higher than 150mm. while the lug 4 of the positive plate 2 is extended from the lug fixing portion 5 having the height (h) shorter than 150mm. and the upper end is welded to the positive pole strap 6. The negative plate has similar shape and the upper end of its lug 7 is welded to the negative pole strap 8. When varying the heights of the active substance section and the lug fixing section to perform alternative charge/discharge test, deterioration of capacity will be low even when the lug fixing section is on the upper side of plate if the height (H) of the active substance section is shorter than 150mm., but it will be high when exceeding over 150mm.. Consequently when the height of the lug fixing section is made shorter than 150mm., deterioration of capacity can be suppressed considerably even if the height (H) of the active substance section is higher than 150mm..

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage battery of a type in which the amount of electrolyte is reduced and oxygen gas is absorbed by the cathode plate, and the capacity decreases early when increasing the capacity of this type of battery. The second objective is to prevent this.

When increasing the capacity of a storage battery, the height of the electrode plates must be increased in consideration of floor space during installation. In storage batteries, if the rods are made taller, there is a risk that the storage battery capacity will decrease sooner due to uneven distribution of electrolyte and differences in the usage distribution of the electrode plates. That is, if the height of the electrode plate, and furthermore, the height of the active material portion of the rod plate becomes 150 mm or more, the height of the positive U (in terms of Ri, the height of the active material portion of the rod plate) will quickly decrease to 14 mm.

The present invention has been made in view of the above points, and provides a storage battery of a type in which the amount of electrolyte is reduced and oxygen gas is absorbed by the cathode plate, in which the W'r of the active material portion is 150 or more. It is characterized in that it is equipped with a plate and that the ear attachment portion of the electrode plate is located at a height of less than 150 points.

The following is a first diagram showing an iE cross-sectional view of an embodiment of the present invention.
This will be explained in detail with reference to the drawings. That is, in the drawings, 1 is a battery case, 2 is a positive electrode plate, and 6 is a separator mainly made of glass fibers with a fiber diameter of 1 μm or less. The positive electrode plate 2 and the negative electrode plate are housed in the battery case 1 while being alternately inserted between separators 3 bent in a zigzag shape. The positive electrode plate 2 and the negative electrode plate are made such that the height H of the active material portion thereof is 15 om or more. Also, 4 is the lug of the positive electrode plate.

The ear 4 extends beyond the moon attachment part 5 whose height is less than 150M, and its upper end is welded to the positive electrode strap 6. The negative electrode plate also has the same shape as the positive electrode plate 2, and the upper end of the moon 7 of the negative electrode plate is welded to the negative electrode strap 8.

Also 9 is +! 10 is a negative pole, 11 is a battery cover, and 12 is an exhaust valve.

Now, we have changed the height of the active material part of the electrode plate and the height of the ear attachment part. A storage battery was prepared using a positive electrode plate and a negative electrode plate, and a mutual charge/discharge test was performed on this battery. The ratios of the 10% l-1 and Q'50-th capacities to the initial capacity are shown in Table 1.

Table 1 The following can be seen from the results in Table 1. In other words, if the height of the active material portion is approximately 15 mm, even if the height is approximately 15 mm (=tlI structure such that the J part is on the upper side of the electrode plate).

The low F'' of capacity due to AC σ charging and discharging is small.
When it comes to 5 EUm or 198 meters.

If the configuration is such that the mounting portion 11 is located on the upper side of the electrode plate, the capacity ratio to the initial capacity 31 of the 5O-=-th would be 75% or 50%, respectively, which is extremely large. However, even if the height of the active material part is 150ffl+, even for a storage battery using electrode plates with a height of 150ffl+? When the amount is less than 1, the amount of water per cup can be extremely reduced.

Next, other embodiments of the present invention will be explained with reference to the drawings.

That is, FIG. 2 is a cross-sectional view of one embodiment, showing a positive electrode plate 2a and a negative electrode plate 4a.

7a on each side of the positive electrode plate 2a and the negative electrode plate.
U protrudes laterally from the lower position of m11&l.

The ears 4a + 7a are connected to positive electrode struts 6a and E.
' It is in contact with the single-pole strap 8a. Furthermore, 9a
is a positive pole + 10a is a negative pole, and the positive pole 9a is a positive pole.

The negative electrode 1110a is formed long and extends from the positive electrode stator 8a and the negative electrode stator 8a, and is drawn out to the outside of the battery by penetrating the battery case lid 11a.

6 and 4 are front views of positive electrode plates in respective embodiments of the present invention.

FIG. 5 shows that the ear attachment part 5b is attached to the side of the positive electrode plate 2b and
In the figure, the ear attachment portion 5C is numbered at the center of the positive electrode plate 2C. In any of these positive electrode plates 2b and 2c, the heights 11b and hC of the ear 1 parts 5b and 5c are 1.
Located at a height of less than 50 degrees.

Hereinafter, some embodiments of the present invention have been explained.5
Although the present invention is not limited to these examples, various embodiments can be considered without departing from the spirit thereof. For example, in the above embodiments, both the positive electrode plate and the negative electrode plate have their selvedge ζJ portions located at a height of less than 150 degrees. may be applied. Furthermore, according to the invention, 1. In order to prevent the active material in the part from reacting more than the other parts, the aim is to keep the distance between the -L part and the J part 1. For example, in the example shown in Fig. 4
) ((1) may have a structure in which an insulating hli reinforcement material is placed between the two.

Summary 1 The present invention has high industrial value.

[Brief explanation of drawings]

1 and 2 are cross-sectional views showing one embodiment of the present invention, and FIGS. 6 and 4 are top views of the positive electrode plate in each of the embodiments of the pond of the present invention.

Claims (1)

[Claims] In a storage battery of a type in which the amount of electrolyte is reduced and oxygen gas is absorbed by the cathode plate, the height of the active material portion is 15[]+
In addition to having a polar plate of ff or more. A storage battery characterized in that the ear attachment portion of the electrode plate is provided at a height of less than 150 mm.