JP2005158400A - Control valve type lead acid storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control valve type lead acid storage battery, hardly leaking with a large size, with little deterioration due to stratification of electrolyte, and having a long life. <P>SOLUTION: A protruded part 16 protruding about 0.5 mm from the surface of all the horizontal bones 15 having about 10 mm spacing is provided at the negative electrode current collector 11 used in the negative electrode plate 2. A resin impregnation portion 17 impregnated with epoxy resin is installed at the portion of a separator 3 opposed to the protruded part 16 of the negative electrode current collector 11 of the negative electrode plate 2. An electrode plate group is manufactured using these negative electrode plate 2, separator 3, and a positive electrode plate 1 which is used conventionally. Then, a control valve type lead acid storage battery is manufactured using this electrode plate group and in a conventional technique. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a valve-regulated lead-acid battery.

  Control valve-type lead-acid batteries are widely used in uninterruptible power supplies, automobile batteries, and the like because they have the feature of being inexpensive and highly reliable. Here, a large-sized control valve type lead-acid battery having a large discharge capacity is strongly demanded by a recent customer, and the size of the electrode plate is also increased.

  In addition, with the increase in the size of the electrode plate, in order to prevent the stratification of the electrolyte solution, there are increasing cases in which the plate surface of the electrode plate constituting the electrode plate group is installed in a horizontal direction ( For example, see Patent Document 1.) That is, the control valve-type lead-acid battery is installed in a lying state and used, thereby preventing the stratification of the electrolyte.

Japanese Patent Application No. 2002-367440.

  However, when the electrode plate constituting the electrode plate group is used for a long period of time with the plate surfaces installed in a horizontal direction, the electrolyte of the control valve type lead-acid battery is likely to leak from the vicinity of the terminal during use. Is allowed.

  The present invention solves the above-described problems, and provides a control valve type lead-acid battery that is difficult to leak, has little deterioration due to stratification of the electrolyte, and has a long life.

  In order to solve the above-described problems, a control valve-type lead-acid battery according to the present invention is obtained by improving the horizontal core of the negative electrode current collector and the separator.

  That is, the invention according to claim 1 is used in such a manner that a positive electrode plate, a negative electrode plate, and a separator constitute an electrode plate group, and the plate surfaces of the electrode plates constituting the electrode plate group are arranged in a vertical direction. In the control valve-type lead-acid battery, the lateral middle bone of the negative electrode current collector of the negative electrode plate has a convex portion toward the separator.

  According to a second aspect of the present invention, in the first aspect of the present invention, a portion of the separator facing the convex portion is impregnated with a resin.

  As an effect of the present invention, it is possible to provide a large control valve type lead storage battery having a long life that hardly leaks and does not easily cause stratification of the electrolyte.

The present invention is described in detail below.
1. Production of Control Valve Type Lead Acid Battery A comparatively large control valve type lead acid battery (for example, a control valve type lead acid battery having a rated capacity of 1000 Ah) which has been used conventionally is generally shown in FIG. Has a good internal structure. That is, it has a lattice shape partitioned by inner bones at intervals of about 10 mm, and a positive electrode current collector 10 and a negative electrode current collector 11 having ears 18 are produced by a casting method, and paste active Fill the substance. After laminating the plurality of positive electrode plates 1 and negative electrode plates 2 with the separator 3 interposed therebetween, the respective ear portions 18 are welded and integrated to form an electrode plate group having the pole columns 9 and the straps 6. .

Then, after inserting the electrode plate group into the bottomed battery case 4 having an opening, the upper part of the battery case 4 and the lower surface of the lid 5 are heated by applying, for example, a hot plate, etc. The battery case is formed by butt-welding to the battery case 4 to form a battery case. In the following examples, a control valve type lead battery (2V-400Ah) having a length of 135 mm, a width of 155 mm, and a height of 420 mm was produced and compared.
2. Cycle life test of control valve type lead acid battery After completion of the control valve type lead acid battery, auxiliary charge was performed, and the cycle life characteristics were measured in a state where the plate surfaces of the electrode plates constituting the electrode plate group were arranged in the vertical direction. The test environment was about 30 ° C., and after discharging at 80 A (0.2 CA) from a fully charged state for 3.75 hours (75% of the rated capacity), a constant voltage of 2.45 V (however, the limiting current was 80 A) (0.2CA)) is 4 cycles of charging, and the end-of-discharge voltage is measured every 100 cycles.

As Example 1 to Example 4 according to the present invention, as shown in FIG. 1, a negative electrode plate 2 using a negative electrode current collector 11 having a convex portion 16 on a lateral central bone 15 toward a separator 3 is used. It was. A resin-impregnated portion 17 impregnated with a resin, for example, an epoxy resin, was provided on the portion of the separator 3 facing the convex portion 16. On the other hand, as the positive electrode plate 1, a positive electrode current collector 10 that has been conventionally used and does not have the convex portion 16 on the lateral rib 15 is used.
Using these positive electrode plate 1 and negative electrode plate 2 and laminating and welding through separator 3, an electrode plate group as shown in FIG. 1 is assembled, and a control valve type lead-acid battery is produced with the above specifications. After that, a life test was conducted.
(1) Example 1
As Example 1 according to the present invention, a convex portion 16 was provided in which all of the lateral central bones 15 at intervals of about 10 mm of the negative electrode current collector 11 were projected from the surface by about 0.5 mm.
(2) Example 2
As Example 2 according to the present invention, convex portions 16 that are projected from the surface by about 0.5 mm are provided at intervals of 50 mm in the lateral central bones 15 at intervals of about 10 mm of the current collector 11 for negative electrode.
(3) Example 3
As Example 3 according to the present invention, among the transverse central bones 15 at intervals of about 10 mm of the negative electrode current collector 11, convex portions 16 are provided that protrude about 0.5 mm from the surface at intervals of 100 mm.
(4) Example 4
As Example 4 according to the present invention, a convex portion 16 was provided in which all of the lateral central bones 15 at intervals of about 10 mm of the negative electrode current collector 11 were projected from the surface by about 0.2 mm.
(5) Example 5
As Example 5 according to the present invention, as shown in FIG. 1, a negative electrode plate 2 having a negative electrode current collector 11 having a convex portion 16 on a lateral rib 15 was used. And the convex part 16 which protruded about 0.5 mm from the surface of all the horizontal ribs 15 of about 10 mm space | interval of the collector 11 for negative electrodes was provided.

  On the other hand, the separator 3 conventionally used as shown in FIG. 2 without the resin impregnated portion 17 was used. Further, as the positive electrode plate 1, a positive electrode current collector 10 that has been conventionally used and does not have the convex portion 16 on the lateral rib 15 was used.

The positive electrode plate 1 and the negative electrode plate 2 were used, laminated and welded via the separator 3 to assemble an electrode plate group, and a life test was conducted after producing a control valve type lead storage battery with the above-mentioned specifications.
(6) Comparative Example 1
As Comparative Example 1, as shown in FIG. 2, a negative electrode plate 2 having a negative electrode current collector 11 which has been conventionally used and does not have a convex portion 16 on the lateral bone 15 was used. Further, the separator 3 that has been used conventionally and does not have the resin impregnated portion 17 was used. Further, as the positive electrode plate 1, a positive electrode current collector 10 which has been conventionally used and does not have the convex portion 16 on the lateral rib 15 is used.

Using these positive electrode plate 1 and negative electrode plate 2, lamination and welding were performed via separator 3 to assemble an electrode plate group as shown in FIG. 2, and a control valve type lead-acid battery was produced with the above specifications. Later, a life test was conducted.
(7) Comparative Example 2
As Comparative Example 2, although not shown, a positive electrode plate 1 using a positive electrode current collector 10 having a convex portion 16 on a lateral middle bone 15 was used. And the convex part 16 which protruded about 0.5 mm from the surface of all the horizontal ribs 15 of about 10 mm space | interval of the collector 10 for positive electrodes was provided.

  Then, a resin impregnated portion 17 as shown in FIG. 1 impregnated with a resin, for example, an epoxy resin, was provided on the portion of the separator 3 facing the convex portion 16. On the other hand, as the negative electrode plate 2, a negative electrode current collector 10 that has been conventionally used and does not have the convex portions 16 on the lateral ribs 15 is used.

  Using these positive electrode plate 1 and negative electrode plate 2 and laminating and welding via separator 3, assembled the electrode plate group, and after producing a control valve type lead storage battery with the above specifications, a cycle life test was conducted. did.

  Table 1 shows the results of the cycle life test. It can be seen that Examples 1 to 5 using the present invention have a longer life than Comparative Examples 1 and 2. Although the detailed reason is not clear, it is considered that if the convex portion 16 is provided on the lateral central bone 15 of the negative electrode current collector 11, the movement of sulfate ions to the lower portion can be suppressed, so that stratification can be prevented. .

  Further, it is considered that stratification can be further prevented by providing the resin impregnated portion 17 in the portion of the separator 3 facing the convex portion 16. In addition, when the present invention is used, it can be used in a state where the plate surface of the electrode plate is erected in the vertical direction, so that it is possible to make it difficult for the electrolyte to leak from the vicinity of the terminal 7. .

  The present invention can be mainly used for a large control valve type lead-acid battery that is used in a state where an electrolytic solution is soaked in a separator or an electrode plate.

It is the schematic of the part which comprises the electrode group of Example 1-Example 4 concerning this invention. 5 is a schematic view of a part constituting an electrode plate group according to Comparative Example 1. FIG. It is a notch section perspective view of a control valve type lead acid battery.

Explanation of symbols

1: positive electrode plate, 2: negative electrode plate, 3: separator, 4: battery case, 5: lid, 6: strap,
7: Terminal, 8: Safety valve part, 9: Polar pole, 10: Current collector for positive electrode, 11: Current collector for negative electrode,
12: vertical frame bone, 13: vertical frame bone, 14: horizontal frame bone, 15: horizontal frame bone, 16: convex part,
17: Resin impregnation part, 18: Ear part

Claims (2)

In the control valve type lead acid battery used in the state where the electrode plate group is constituted by the positive electrode plate, the negative electrode plate and the separator, and the plate surfaces of the electrode plates constituting the electrode plate group are arranged in the vertical direction,
The control valve-type lead-acid battery, wherein the horizontal core of the negative electrode current collector of the negative electrode plate has a convex portion toward the separator. The control valve type lead-acid battery according to claim 1, wherein a portion of the separator facing the convex portion is impregnated with resin.

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