JPS60207261A - Sealed lead storage battery - Google Patents

Abstract

PURPOSE:To increase the life and the performance of the retainer battery by pouring electrolyte into a storage battery, which is assembled by installing a positive or negative plate in each sack-like retainer formed by a nonwoven fabric of inorganic or organic fiber, until the plates are immersed up to their specified height. CONSTITUTION:After each retainer 1 consisting of a nonwoven fabric of inorganic or organic fiber is formed into a sack, a positive or negative plate is installed in the sack thereby assembling a storage battery. Electrolyte 3 is poured into the battery until 1/10 to 1/2 of the height (H) of the plates is immersed so that the lower part works as a liquid-type battery and the upper part works as a retainer battery. By using the sack-like retainer 1, any short circuit of the negative plate 5 which might be caused due to production and growth of dentrite is prevented and free electrolyte 3 is held in the retainer 1. As a result, it becomes possible to decrease the specific gravity of the electrolyte 3 and increase its amount. Additionally, by adjusting the height (h) of the liquid level of the free electrolyte 3 to 1/10 to 1/2 of the height of the plate, the efficiency of sealed reaction is maintained at a level of at least 90% and therefore it is possible to increase the cycle and the trickle life performances.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a sealed lead-acid battery (hereinafter referred to as "retainer battery-1") that uses a nonwoven fabric of inorganic or organic fibers as a separator and has a structure in which the separator retains an electrolyte. It is.

Conventionally, retainer batteries have been manufactured in a state where there is no free liquid by increasing the specific gravity of the electrolyte and reducing the amount of the electrolyte. This is the part where the electrode plate is immersed in the electrolyte when there is free liquid.
Dendrites form and grow on the negative electrode plate, causing a short circuit with the positive electrode plate and prematurely reaching the end of its life. For this reason, in conventional retainer batteries, the positive electrode active material is likely to become muddy, and battery performance is often impaired due to a decrease in electrolyte during use.

In conventional retainer batteries, in order to ensure longevity W in the absence of free liquid, it is necessary to strictly control the injection of electrolyte, which requires a large amount of cost.

The present invention aims to improve the service life and performance and reduce processing costs by improving the drawbacks of conventional retainer batteries.

As shown in Part 1, a non-woven inorganic or organic fiber separator (hereinafter referred to as a "retainer") is made into a bag shape, a positive electrode plate or a negative electrode plate is housed in the bag, and a storage battery is assembled.
As shown in the figure, the electrolytic solution is injected until 1/10 to 1/2 of the height of the electrode plate is immersed, and the lower part is used as a liquid battery and the upper part is used as a retainer battery. This allows free liquid to be retained without significantly deteriorating the sealing function. In this way, by creating a structure in which the bag-shaped retainer prevents short circuits due to the formation and growth of dendrites on the negative electrode plate and retains free liquid, it is possible to lower the specific gravity of the electrolyte and increase the amount of electrolyte. Become. Furthermore, it suppresses the muddy formation of the positive electrode active material, suppresses the deterioration of battery performance due to a decrease in electrolyte, and improves the life performance of sealed lead-acid batteries. Therefore, variations in the amount of electrolyte injected can be tolerated to a large extent.

Table 1 shows examples of the present invention. In Table 1, h and H have the same meaning as the second figure and H, respectively.

Table 1 As is clear from Table 1 above, by setting the free liquid level height h to Vlo to 1/2 of the extreme height H, the sealed reaction efficiency can be maintained at 90% or more, and the cycle, Trickle life performance can be improved.

A in the afternoon in Fig. 1 is a retainer 1 which is made by overlapping two single-plate retainers and making them into a bag shape by gluing, welding, sewing, etc. at the diagonal line part, and B is a retainer 1. This is a retainer 1' which is bent into a U-shape and formed into a bag-like shape by bonding, welding, sewing, etc. the diagonally shaded portion.

Further, FIG. 2 shows a state in which the positive electrode plate 2 is housed in the retainer 1 to assemble a lead-acid battery, and the electrolytic solution 3 is injected to the liquid level height h, where h in this case is LH≦h≦−. !
-H.

10 2 Note that 4 is a battery case and 5 is a negative electrode plate.

As mentioned above, the present invention achieved 20% in the cycle life test.
%, )' J-cycle life test improved by 40%, and the accuracy of the injection amount was relaxed, so the cost of injection equipment was reduced by 30%.
The industrial value, such as the reduction in fuel costs, is also significant.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the retainer used in the present invention.
B shows the case where two single-plate retainers are used, and B shows the case where the retainer is bent into a U-shape. FIG. 2 is a sectional view of the main part of the sealed lead acid storage tank according to the present invention. 1 is a retainer, 2 is a positive electrode plate, 3 is an electrolyte, 5 is a negative electrode plate 1, a battery tank 2: a negative electrode plate 3: a bag-like retainer 4: a positive electrode plate 5: a free electrolyte Patent applicant Figure 1 A B 2 figure

Claims (1)

[Claims] A sealed lead-acid battery characterized in that an electrolytic solution remains until 1710 to 1/2 of the height of the electrode plate is immersed.