JPS63190249A - Lead storage battery - Google Patents

Abstract

PURPOSE:To obtain high initial capacity-characteristic and also extend the lifetime-characteristic of the cell in the caption by providing a dense mat-form fibrous layer including fiberglass so that it can touch a positive electrode. CONSTITUTION:A lead storage battery in which a dense fibrous layer 12 is provided so that it can touch a positive electrode by a mat-form laminated isolation board 11 can improve its initial capacity-characteristic because an electrolyte contributing to a cell reaction can be secured in a rough fibrous layer 13 which exists in the mat-form laminated isolation board 11. And also, because the fibrous layer 12 with dense texture is provided so that it can touch the positive electrode, softened active material is prevented from falling off from the positive electrode, then a lifetime-characteristic can be improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to improvements in lead P:r batteries.

2. Description of the Related Art Conventionally, a separator for lead-acid batteries has been used in which a microporous thin film 1 and a mat 2 made of glass fiber are laminated together, as shown in FIG. When this ridge separator is used, the mat 2 made of glass fiber is placed in contact with the positive electrode plate, plays the role of securing sulfuric acid that reacts with the positive electrode plate, and the initial volume #fi characteristic is good. At the same time, a mat 2 made of glass fiber comes into contact with the positive electrode plate and retains the active material that softens and falls off due to charging and failure.
Although it has some functions to some extent, its effects (1)
- Not minutes. In order to overcome this drawback, in recent years, a mat-like separator plate having extremely high liquid absorption properties and consisting of a relatively dense layer 3 of glass fibers, as shown in FIG. 3, has been used.

Problems to be Solved by the Invention However, since the above-mentioned highly liquid-absorbing component-shaped separator is relatively dense, the diffusion of the electrolyte is poor. Therefore, in capacity tests, etc., the conventional glass l
l! Compared to a separator made of matte 2 made of fibers and a separator plate laminated with A9 membrane 1, the appearance of the paper can be seen.

The present invention solves the above problems (゛, high first!
The purpose of this project is to increase capacity and provide a long-term lifespan.

Step 1 to solve problem 1U What is the lead of the present invention to solve the above problems? The S battery uses a liquid-absorbing mat-like tFr separator that has a mat-like dense fiber layer containing at least glass fibers and a phased fiber layer, and connects the dense fiber layer to the positive electrode plate. 9.

The monthly yield of the mat-like laminated sheet #i may be either a type A glass fiber or a mixture of synthetic fibers such as glass fiber, and may contain powder.

For dense layer II, the pore size is preferably 30 μl or less, and 50 μl or less is preferable for the pore size of the original layer. dense 4 & 4
11r! The lamination number of the original fiber layer may be consecutively made into sheets, or it may be made into separate sheets and laminated together.

In addition, the dense fiber layer and the fine wafer f of the mat-like laminated separator
It is preferable that at least one fiber layer of the fiber layer of f1t'i) is impregnated with phenol 81 resin to improve acid resistance and oxidation resistance.In this case, dense 9i4#L114 is impregnated with phenol resin In. If such a material is applied, the hydrophilicity may deteriorate, so it is desirable to treat the phase-matching fiber layer.

Function In the above structure, since the matte V1 layer separator is provided with a coarse fibrous Pi layer, this layer secures an electrolytic solution of ISO'j to the cell surface 145, and the initial capacity characteristic is improved to Il.
Moreover, since the dense fiber layer is placed in contact with the positive electrode plate, it prevents the active material from falling off due to softening from the positive electrode plate. ing.

Example Embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a schematic perspective view of 1J showing an example of a mat-like laminated separator used in the lead-acid acid battery of the present invention. In FIG. 1, the mat-like laminated separator 11 consists of two fiber layers made of glass fibers having a fiber diameter of about 2 μm;
The fibers Mi#412 and 12 have a dense structure of 11 m thick fiber layer 13 of about 10 μII fibers with a diameter of about 10 μII [11 m of mat-like fibers made of glass carded paper with a density of 0.2 g/cc]. They are sandwiched in a stack 8.

Using the above matte laminated separator 11, the fibers 161
12 in contact with the positive electrode plate (not shown) has a coarse m-fiber Fr! inside the mat-like laminated separator 11. J13/1% exists, this ancestor 41
Insertion into the battery reaction in M layer 13! As shown in Figure 3, the initial capacity characteristics are better than those using a mat-like separator consisting of a relatively dense fiber layer, and the structure is less dense. Because the 4i miscellaneous layer 12 is arranged so as to be in contact with the positive electrode plate, the active material that softens from the positive electrode plate is generated.
l! This prevents the falling of the lr, 1, and improves the quality of the lr, compared to the conventional separator plate in which the microporous 4f1s membrane 1 and the mat 2 are pasted together, as shown in Figure 2. .

An initial capacity test and a battery life test were conducted on a lead-acid battery using the above-mentioned mat-like laminated separator 11. The test battery had a 5 hour rate capacity of 1.1j28Ah. Initial capacity test is 25
℃ 5 flash current (5,6A >)
．． The voltage was reduced to 75 V/cell. In addition, for life test number, the above-mentioned initial capacity test was repeated, and the number of cycles until the container became less than 148:1 was defined as the life span.

゛ As comparative examples, (I> Figure 2 shows a 1Jv!I separator made by laminating a porous thin pattern with a mat, and (II> Figure 3 shows a lead core using a mat-like separator, respectively. Regarding the battery, it was tested under the same conditions as in the example described above.
, Bi] I-life test was conducted.

The test binding for the above Examples and Comparative Examples is shown in Table 1.

Table 1 As is clear from Table 1, the lead-acid battery of the example of the present invention has a significantly higher initial capacity characteristic than the conventional lead-acid battery using a mat-like separator of the comparative example (■). The initial capacity characteristics were the same as those of the lead-acid battery using the thin film and matte separator of Comparative Example (I), which had good initial capacity characteristics. The life characteristics were no better than those of Comparative Example (11).

North Gate Effect Book 5E Ming Lead? 528 uses a liquid-absorbing mat-like laminated separator in which a mat-like dense fiber RIM containing at least glass fiber and a coarse fiber layer are laminated, and the dense fiber layer is brought into contact with the positive electrode plate. Since it is placed in
I am very confused about L and S1 life L'.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an embodiment of a mat-like laminated separator used in a lead-acid battery according to the present invention; FIG. 2 is a schematic perspective view showing an example of a separator used in a conventional lead-acid battery; The figure is a schematic perspective view showing another example of separators used in conventional lead-acid batteries. 11...Matt-like laminated separator, 12...Dense fiber layer, 13...Coarse Ume 1i1 layer. Agent Akira Hiroshi Mori Figure 1 13-・Rough familiarization

Claims (1)

[Scope of Claims] 1. A liquid-absorbing mat-like laminated separator in which a mat-like dense fiber layer containing at least glass fiber and a coarse fiber layer are laminated is used, and the dense fiber layer is used as a positive electrode plate. Lead-acid batteries placed so that they touch each other. 2. The lead-acid battery according to claim 1, wherein at least one of the dense fiber layer and the coarse fiber layer of the mat-like laminated separator is acid- and oxidation-resistant treated.