JPH05299113A - Sealed storage battery - Google Patents

Abstract

PURPOSE:To prevent a voltage loss in the connection part between cells and the lowering of an active substance utilization factor in the circumferential part of a battery by stacking up frame bodies each having an electrode plate and an active substance to wind it spirally and bonding frame bodies with each other and partition parts with each other. CONSTITUTION:A positive electrode active substance is filled on a collector within one section of a collector 3 and a negative electrode active substance is filled on a collector within the other section. One sheet each of an electrode plate 9 and a positive electrode plate 7 connected to a positive electrode plate and a negative electrode plate of an adjoining cell through a partition part is included in the frame body 1. One sheet each of the electrode plate 9 and a negative electrode plate 8 is included in a frame body 2. A positive and a negative electrode collector part 11, 12 are respectively formed on one end of the frame body 1, 2. A positive and a negative electrode paste 5, 6 for a lead-acid battery are filled in the collector 3. An outer tube part 13 made of the same resin as the frame body 1 and a shaft part 14 and a liquid injection opening 15 are provided in the battery. The frame body 1 and the frame body 2 are wound up in a cylindrical form around the shaft part 14 of the frame body 1 and finally the outer tube part 13 is bonded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a sealed storage battery.

[0002]

2. Description of the Related Art A battery having a structure in which a strip-shaped positive electrode plate and a negative electrode plate are wound in a spiral shape via a strip-shaped separator has a structure in which an electrode plate group is strongly pressed and wound, It is not necessary for the electrode plate itself to have strength for supporting the electrode plate group, unlike a battery produced by laminating an electrode plate and a separator, and a very thin electrode plate can be used. Therefore, the surface area of the electrode plate is large, and the active material utilization rate and voltage characteristics are excellent.

However, although the spiral-shaped battery has excellent voltage characteristics in a single cell, when these are combined to form a high voltage, the cells must be connected to each other, and the voltage due to the ohmic loss in the inter-cell connecting portion is required. There was a drawback that the loss became large.

Further, if the number of turns is increased and the battery diameter is increased in order to increase the capacity, the voltage drop on the side facing the electrode ears increases as can be seen from the resistance distribution of the electrode plate shown in FIG. 6 (B). However, the utilization rate of the active material in that portion is lowered, and it is difficult to obtain a large capacity battery.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a sealed storage battery capable of preventing a voltage loss at an inter-cell connecting portion and a decrease in active material utilization rate at a battery outer peripheral portion. Is divided into a plurality of parts, the current collector is continuous through the partition, the positive electrode active material on the current collector in one compartment, the negative electrode active material on the current collector in the other compartment, A frame body having positive and negative electrode plates respectively filled therein, and a frame body having a current collector and a positive electrode plate in which positive and negative electrode active materials are arranged so as to form a series battery in a horizontal direction when stacked with the frame body. Are stacked, and the stacked frame bodies are wound in a spiral shape and the frame bodies and the partition portions are bonded to each other to integrally form a plurality of cells.

[0006]

EXAMPLES The present invention will be described below based on examples.
A sealed lead battery according to the present invention having a voltage of 6 V (3 cells) and a capacity of about 5 Ah was assembled. The details of the assembly process will be described step by step. FIG. 1 is a view showing a frame body having an electrode plate used in the sealed storage battery of the present invention.

First, the frames 1 and 2 shown in FIGS. 1 (A) and 1 (B) were produced, respectively. These are Pb-C
By integrally molding the current collector 3 composed of an expanded lattice, which is produced by expanding the sheet of a-type alloy, with the resin so as to extend through the partition 4 that divides the frame body into a plurality, It is intended to be formed. Current collector 3
The positive electrode active material is filled on the current collector in one of the compartments, and the negative electrode active material is filled on the current collector in the other compartment. The frame body 1 includes a positive electrode plate 7 and a positive electrode plate 7 each having a positive electrode plate and a negative electrode plate of adjacent cells connected to each other through a partition. The frame body 2 includes one electrode plate 9 and one negative electrode plate 8. Positive and negative electrode current collectors 11 and 12 are formed at one ends of the frames 1 and 2, respectively. The current collector 3 was filled with positive and negative electrode pastes 5 and 6 for a lead battery as shown in FIG. That is, the current collector 3 was provided with the space 10 not filled with the paste. Reference numerals 13 and 14 denote an outer cylinder portion and a shaft portion made of the same resin as that of the frame body 1, and 15 denotes a liquid injection port.

FIG. 2 is a view showing how to combine the electrode plates when the battery of the present invention is manufactured. The frame body 1 and the retainer mat 1 are shown in FIG.
By stacking 6 and the frame body 2 together, a 6V battery (3 cell series) can be produced. Note that FIG.
(A) is a schematic sectional view and (B) is a schematic side view.

FIG. 3 is a view showing how the electrode plate is wound when the battery of the present invention is manufactured. The electrode body is rolled up into a cylindrical shape while adhering the frames 1 and 2 around the shaft portion 14 of the frame 1. Finally, the outer cylinder part 13 was bonded. The isolation between the cells and the airtightness to the outside are completely maintained by the above-mentioned adhesion of the frame body. Note that FIG. 3A is a side view before winding, and FIG. 3B is a side view after winding. Next, injection of an electrolytic solution and charging for formation were performed by the following methods. A predetermined amount of sulfuric acid having a predetermined specific gravity was injected into each cell through the injection port.
The electrolytic solution could be easily injected into the battery through the space 10 not filled with the paste. After the sulfuric acid injection is completed, leave it for about 1 hour to allow the liquid to penetrate into the active material.
After that, the battery was charged for formation. Since the gas generated at the time of charging was discharged from the liquid injection port 15, the battery did not swell and good chemical conversion could be performed.

FIG. 4 is a partial cutaway view showing an outline of the battery thus manufactured. A tubular rubber exhaust valve 17 was attached to the outer periphery of the battery so that the liquid injection port 15 was blocked. Straps 18 and terminals 19 are attached to both ends of the battery.

After the formation was completed, the discharge characteristics of this battery were examined. FIG. 5 shows the discharge characteristics at −15 ° C. and 150 A discharge. For comparison with conventional products, a spiral battery (5A
Also shown is the discharge characteristic of a battery in which h) was connected in series with 3 cells and set to 6V. Battery No. 1 according to the present invention. No. 1 is the conventional product No. The discharge voltage was higher than that of No. 2 and the discharge duration was long. The voltage at the time of discharge was high because the ohmic loss at the cell-to-cell connecting portion could be significantly reduced.

FIG. 6A shows the resistance distribution of the electrode plate of the battery according to the present invention, and FIG. 6B shows that of the conventional battery. Since the resistance of the conventional electrode plate is large and non-uniform on the side facing the ear that is the current collector, the utilization rate of the active material is small in the region where the resistance is high. On the other hand, the resistance distribution of the electrode plate of the battery according to the present invention was more uniform and smaller than that of the conventional product. Therefore, it is considered that the utilization rate of the active material on the side facing the current collector is improved as compared with the conventional one.

In the above embodiment, 6V (3 cells), capacity about 5
I showed the battery of Ah, but the battery voltage and capacity are
It can be freely changed depending on the number of cells combined, the size of the electrode plate, the number of windings, and the like. According to the invention, for example,
It is possible to produce a small automobile battery or the like having excellent voltage characteristics.

[0014]

INDUSTRIAL APPLICABILITY The present invention has the effects of reducing the voltage loss when connecting several sealed lead-acid batteries in series and improving the active material utilization rate, and its industrial value is It's huge.

[Brief description of drawings]

FIG. 1 is a view showing a frame body having an electrode plate used in the sealed storage battery of the present invention.

FIG. 2 is a diagram showing how to combine the electrode plates when producing the battery of the present invention.

FIG. 3 is a diagram showing how to wind an electrode plate when producing a battery of the present invention.

FIG. 4 is a partial cutaway view of the battery of the present invention.

FIG. 5 is a diagram comparing discharge characteristics of batteries at −15 ° C. and 150 A.

FIG. 6A is a resistance distribution diagram of the electrode plate of the battery of the present invention. FIG. 6B is a resistance distribution diagram of the electrode plate of the conventional battery.

[Explanation of symbols]

 1 frame 2 frame 3 current collector 4 partition 5 positive electrode paste 6 negative electrode paste 7 positive electrode plate 8 negative electrode plate 9 electrode plate 10 space 11 positive electrode current collecting part 12 negative electrode current collecting part 13 outer cylinder part 14 shaft part 15 injection liquid Mouth 16 Retainer mat 17 Exhaust valve 18 Strap 19 Terminal

Claims (1)

[Claims] 1. A positive electrode active material on a current collector in one of the current collectors that are divided into a plurality of partitions by a partition and are continuous through the partition, and a current collector in the other partition. A frame body having positive and negative electrode plates filled with the negative electrode active material, and a current collector and an electrode plate in which the positive and negative electrode active materials are arranged so as to form a series battery in a horizontal direction when the frame body is superposed. A hermetically sealed storage battery, characterized in that a plurality of cells are integrally formed by stacking the frame body and winding it in a spiral shape.