JPS58158861A - Lead acid battery - Google Patents

Abstract

PURPOSE:To suck electrolyte by capillarity and uniformalize the concentration of the electrolyte by making the density at the upper part of the assembled element of a separator higher than that at the lower part of it. CONSTITUTION:Positive and negative electrode plates 1 and 2 are 60mm. high or more. Besides, a sheet-shaped separator 3 mainly made of glass fiber with its diameter of less than 1mu and with predetermined uniform density and thickness is bent in zigzag and is inserted between the positive and negative electrode plates 1 and 2. Such formed assembled element is inserted from downward in a container 4 that is formed narrower upward. As a result, the separator 3 permits the density at the upper part of the assembled element to become higher than that at the lower part of it. Then, a lead acid battery is completed by making the container bottom 5 and the container cover 6 adhere to the container 4. As a result of the structure, since the suction force is increased by capillarity and the electrolyte at the lower part of the assembled element can be sucked up, the unevenness of electrolytic concentration can be prevented and thus a long-life lead acid battery can be obtained.

Description

[Detailed description of the invention] In a lead-acid battery in which a sheet-like separator mainly made of glass fiber with a fiber diameter of 11I or less is arranged between positive and negative electrode plates, charging and discharging are repeated when the height of the electrode plates reaches a minimum. As a result, the concentration of the electrolytic solution in the upper part is thin, and the concentration of the electrolytic solution in the lower part becomes high.This has the drawback that the life of the lead-acid battery becomes extremely short especially when the height of the electrode plate becomes 60 cm or more.

The present invention has been made in view of the above points, and provides a sheet-like separator having an electrode plate height of 60 earthquakes or more, and a sheet-like separator formed mainly of glass fiber with a fiber diameter of 1 tone or less between the positive and negative electrode plates. In a lead-acid battery with a separator, by making the density of the upper part of the separator higher than that of the lower part, capillarity causes the separator to move from the upper part of the pole group to the lower part of the pole group. The feature is that the electrolyte is sucked up from a certain point, thereby making the concentration of the electrolyte uniform.

Hereinafter, the present invention will be explained in detail with reference to the drawings showing one embodiment thereof. That is, FIG. 111 is a front cross-sectional view thereof, where 1 is a positive electrode plate and 2 is a negative electrode plate. The suppression/negative electrode plate 1.2 is configured to have a height of 60 degrees or more. Also, 5 is the fiber diameter 1
This is a sheet-like separator mainly made of glass fibers with a diameter of less than μ.

The separator 5 has a uniform density and thickness and is bent into a zigzag shape to form the positive and negative electrode plates 1-2.
The electrode group thus formed is inserted from below into the battery case 4, which is formed narrowly at the top, and the separator 6 has a density at the upper part of the electrode group that is lower than the lower part. It becomes more of an allegory than the passage located in . After this, battery case 4
The bottom of the battery case 5 and the battery case! 6 is fixed and the lead battery is completed.

Note that 7 is a dilute sulfuric acid electrolyte, 8 is a positive terminal, and 9 is a safety valve.

In this way, in the present invention, the part located at the upper part of the polar group of Separate and Yu has a higher density and the pore diameter is smaller, so the liquid absorption force due to the hair cage phenomenon is greater, and the part located at the lower part of the polar group Since the electrolyte is sucked up from a certain point, unevenness in the concentration of the electrolyte can be prevented, and a long-life lead battery can therefore be obtained.

In addition, the oxygen gas generated on the positive electrode plate becomes difficult to escape.
As a result, even when the oxygen gas is absorbed by the negative electrode plate, it is possible to obtain a lead-acid battery that does not require any effort such as water replenishment.

That is, the present invention has a fluid electrolyte as shown in the embodiment, and even in a lead battery where the electrolyte level is above the electrode group, the electrolyte is retained in the electrode group pores and is substantially free. Although it can be applied to lead batteries that do not have an electrolyte, it is not necessary to provide a safety valve in batteries that have a flowing electrolyte.

Although one embodiment of the present invention has been described in detail above, various embodiments of the present invention can be considered without departing from the spirit thereof. For example, one method is to insert a horizontal spacer into the side of the pole group in a battery case with parallel side walls to make the density of the separator at the top of the pole group higher than that at the bottom. be. Furthermore, the same effect can be expected even if a separator is prepared in advance in which the density is higher or thicker in the upper part of the pole group than in the lower part, and the pole group is assembled. I can do it.

Unegami, the present invention has great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of an embodiment of the present invention. Applicant Yuasa Battery Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] 1) In a lead-acid battery in which the electrode plate height is 60 cm or more and a sheet-like separator mainly made of glass fiber with a fiber diameter of 1 tone or less is arranged between the positive and negative electrode plates, A lead-acid battery characterized in that the density of the tube located at the upper part of the separator pole group is higher than that of the part located at the lower part. 2) Contains a fluid electrolyte 1. The lead-acid battery according to claim 1, wherein the electrolyte level is located above the electrode group. 5) The lead battery according to claim 2, which is equipped with a safety valve. 4) The lead battery according to claim 1, wherein the electrolyte is retained in the electrode group holes, has substantially no free electrolyte, and is provided with a safety valve.