JPS6081764A - Sealed type lead storage battery for instantaneous use - Google Patents

Abstract

PURPOSE:To provide a storage battery durable even if it is left as it is over a long period of time instantly useable after injecting electrolytic solution into the battery upon its use by isolating, while keeping air thightness, the electrolyte injection inlet of a sealing type lead storage battery into which electrolyte has not yet been injected, by making use of an isolating material removable with ease, and preventing an internal electrode plate from being oxidized. CONSTITUTION:Air tightness of the injection inlet 8 of a storage battery is kept and closed by, for example, alminium foil 6. The exhaust hole 5 of the battery is closed by filling a small diameter part 14 with rubber cap 16. In this state, the inside of the storage battery is hermetically sealed against the outside, preventing an electrode plate in the storage battery from being oxidized. Upon use, the aluminium foil 6 is stripped off, and electrolyte is injected from the injection inlet 8 with use of a proper vessel for the electrolyte. With completion of electrolyte injection, a sealing plug is fitted in the injection inlet 8 to seal it 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ready-to-use sealed lead-acid battery that can be used immediately without recharging.

Conventionally, all sealed lead-acid batteries have been sold in a completed state as Ronin charged storage batteries. However, in practice, it is ideal to inject electrolyte into a storage battery and use it immediately. This is because storage batteries that have been immersed in liquid during the manufacturing process and those that have been left in the dry state often require a long period of time before they can be used, as they may be left unused, or may have to be transported by sea or other means. . If a long period of time is required before use, the discharge capacity will decrease due to self-discharge of the storage battery.

Therefore, problems such as the need for supplementary charging (recharging) occur, so leaving the battery 11 for a long period of time is not preferable in terms of oil performance and life.

On the other hand, storage batteries that have a general structure that is not sealed, such as storage batteries for automobiles, have come in handy because they have a system in which electrolyte is injected when used.

However, in the case of sealed lead-acid batteries, since the product basically has a sealed structure, it is usually not possible to inject electrolyte during use. In addition, it is necessary to prevent oxidation of the electrode surface that would occur if the electrode surface is left uninjected with electrolyte, and to make it possible to easily inject electrolyte at the site. Against the background of these technical problems, in the field of sealed lead-acid batteries, it is difficult to find a storage battery that can withstand long-term storage before being used, and that can be used immediately after filling with electrolyte. It wasn't showing up.

In view of the above problems, the present invention provides a sealed lead acid battery including:
The purpose of this invention is to provide a so-called ready-to-use storage battery that can withstand being left unused for a long period of time from the time of manufacture, and can be used immediately after injecting an electrolyte. .

FIG. 1 is a plan view of a storage battery according to the present invention.

Electrode terminals 2.3 protrude upward from two corners of the lid l, and a cover plate 4 and an exhaust hole 5 are provided in the center. Also, in the direction parallel to plate 4, the
6 (an example of a blocker) is fixed to the top surface of the lid 1. As is clear from FIG. 2, which shows the lid body 7 with the cover plate 4, foil 6, etc. removed, the foi/L'6 (FIG. 1)
A vertical injection port 8 arranged in a straight line is provided in the part covered by the injection port 8, and a welding table 9 with an oval aluminum foil/l/6 that surrounds the injection port 8 is placed slightly above (at the front of the paper). side). Each injection port 8 is arranged at the center of a stepped portion 10 having a larger diameter, and each stepped portion 10 is adjacent to each other in the left-right direction via four portions 11.

As shown in Figure 3, which is a partial cross-sectional view of Figure 1,
The upper end of the injection port 8 is continuous with the step 10 via the tapered surface 12, and the recess 11 is formed deeper than the step 10. The fusing table 9 surrounding each injection port 8 has its upper end surface located on the same horizontal plane and is formed higher than the surroundings.
The hood/L/6 is fused and fixed only to the fusion stand 9.

Foil/I/6 is made of aluminum foil coated with thermoplastic resin on the bottom surface, and is bonded to the fusing table 9 by high frequency heating.
are fused to maintain airtightness.

As shown in FIG. 4, the exhaust hole 5 has a cylindrical small diameter part 14 in the center that projects upward from the bottom plate 13, and the upper end of the small diameter part 14 has cutouts arranged at equal intervals in the circumferential direction. A notch 15 is provided. A rubber gap 16 is provided at the top of the small diameter portion 14.
are fitted to elastically close the small diameter portion 14. Hole 5
A disc-shaped filter 18 made of air-permeable porous ceramics or the like is fitted and fixed to a stepped portion 17 formed in the vertically intermediate portion of the filter. The cover plate 4 that covers the hole 5 from above is a rectangular resin plate as shown in FIG.
It integrally has legs 2° for welding to the lid at four locations on both ends. Therefore, when the plate 4 is fixed in the shallow recess 21 formed on the upper surface of the lid main body 7 in FIG. 4 by melting the legs 20 using ultrasonic waves or the like, the plate 4 can be easily placed in a predetermined position. .

In FIG. 2, reference numeral 23 indicates a hole into which the positioning projection 19 fits.

Incidentally, in the above embodiment, the porosity of the negative and anode plates used must be set to 50% or more, and this is necessary when injecting the electrolyte from the injection port 8 (Fig. 2). This prevents air and gas from forming on the electrode plates, and also allows the electrolyte to penetrate smoothly into the electrode plates during injection, resulting in stable battery performance. In addition, the total distance t between the cathode plate and the anode plate in the electrode plate group thickness T is 0.15T≦t≦0.
．． By setting 5T to a satisfactory value, it is possible to improve the permeability of the electrolytic solution into the electrode plate group during injection, and to obtain further stability in battery performance. That is, as a result of many experiments, it has been found that when t is less than 0.15T, the liquid injection cannot be carried out smoothly, and when t is more than 0.5T, the battery performance is significantly degraded. For example, considering a group of electrode plates as shown in FIG. 6, the thickness T and the total t are as shown in the figure. In FIG. 6, 24 is a cathode plate, 25 is an anode plate, and 26 is a separator.

Next, how to use it will be explained. The storage battery shown in FIG. 1 is in a state where no electrolyte is injected, and as shown in FIG. 3, the injection port 8 is closed to maintain airtightness with aluminum foil/L/6. As shown in FIG. 4, the exhaust hole 5 has a small diameter portion 14.
is closed by the rubber gap 16. That is, in the state shown in the IT diagram, the inside of the storage battery is airtight with respect to the outside, and oxidation of the electrode plates 24 and 25 (FIG. 6) inside the storage battery is prevented.

The liquid injection operation is performed as follows. The aluminum hood IV6 shown in FIG. 1 is peeled off to expose the injection port 8 (FIG. 2). Next, the electrolyte is injected from the injection port 8 using a suitable electrolyte container.

The injection speed should be set at 0.5 to 2.0 cc/cm because if it is too fast, the electrolyte will overflow from the battery and the specified battery performance will not be achieved.
Preferably, the permeation is performed within seconds, and as shown in FIG. 7, a displacement groove 38 may be formed in the partition wall 37 of the battery case 36 to accelerate the permeation. The amount of electrolyte to be injected is preferably 95 to 110% of the bore polyurethane of the battery plate group so that gas generated during charging during use can be absorbed inside the battery.

When the injection is completed, a sealing plug 89 as shown in FIG. 8 is fitted into the injection port 8 as shown in FIG. 11 to seal the injection port 8. The sealing plug 39 is made up of a number of plug bodies 40 corresponding to the number of injection ports 8 (six in this case) connected together by a connecting portion 41. Note that FIGS. 9 and 10 show other embodiments of the sealing plug 89.

As explained above, according to the present invention, the electrolyte inlet 8 of a sealed lead-acid battery in which an electrolyte is not injected can be easily removed by blocking the electrolyte injection port 8.
Since oxidation of the internal electrode plates 24 and 25 was prevented by maintaining and blocking airtightness with a material (for example, aluminum foil 6), the following effects can be expected.

(a) It can be used immediately when you want to use it. That is, supplementary charging is not necessary when using the battery for the first time.

Φ) Can be stored at high temperatures. Therefore, there is no need to worry about fiber deterioration during transportation in the tropics.

(C) The life of the storage battery is improved. In conventional sealed batteries, the longer the storage period from the time of manufacture to the start of use, the shorter the battery life will be, but if the present invention is adopted, such problems will not occur.

The effects of the present invention will be explained as follows in comparison with conventional products. Figure 12 shows the relationship between storage period (years) and discharge capacity (%), solid lines A and B indicate the storage battery according to the present invention stored in an atmosphere of 25°C and 150°C, respectively, and broken lines C and D are the conventional products at 25°C,
The case is shown when stored in an atmosphere of 50'C. 1st
Figure 3 shows the change in discharge capacity with respect to the life test cycle, and the case with the conventional product is taken as 100%. The solid line E represents the present invention, and the broken line F represents the conventional product. The storage battery according to the invention is also superior to conventional ready-to-use open storage batteries.

Figure 14 shows the case where the open storage battery is a conventional product.
It is a figure which shows the relationship between the voltage and duration in 10 degreeC high rate discharge. In FIG. 14, the solid line G represents the present invention, and the broken line H represents the conventional product. The case with conventional products is assumed to be 100%.

According to the above embodiment, the following effects can be expected.

(a) Since the negative and anode plates 24 and 25 are dry-charged plates with active material porosity of 50% or more, there is no generation of air or gunk when pouring the electrolyte.・Battery performance becomes stable.

(b) Set the plate group thickness T and the total plate spacing t (Fig. 6) to 0.
．． Since 15T≦t≦0,5T, liquid injection can be performed smoothly and a decrease in battery performance can be prevented.

(C) Since the M solution is injected at a speed of 0.5 to 2.0007 seconds, no air or gas accumulation occurs in the separator 26, and the liquid can be injected smoothly.

(d) Since the amount of electrolyte injected was 95% to 110% of the bore volume of the electrode plate group, the electrode plate group has the gas absorption function required for a sealed battery.

(e) The injection ports 8 are sealed by pushing in the sealing plugs 39, which are connected together in a number corresponding to the number of cells so as to match the spacing between the injection ports 8, without protruding from the top surface of the battery. The sealability of the injection port 8 after liquid is easily ensured.

In addition, it is difficult to forcefully pry it open if it comes off during use, and there is no risk of performance deterioration due to premature liquid reduction. Moreover, since the connected sealing plugs 39 are used, there is no chance of losing one of them.

In the above embodiment, aluminum foil iVG was used as the blocker, but the present invention is not limited to this, and for example, a sealing plug that is easy to attach and detach may be used.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the storage tank according to the present invention, Fig. 2 is a plan view of the lid body, and Figs. 8 and 4 are respectively shown in Fig. 1.
5 is a back view of the cover plate, FIG. 6 is a schematic plan view of the electrode plate group, FIG. 7 is a schematic cross-sectional plan view of the battery case of the storage battery, and FIG. ,
9 and 10 are perspective partial views of the sealing plug, FIG. 11 is a view corresponding to FIG. 3 showing the state in which the sealing plug is attached, and FIG. 12
The figure is a graph showing the relationship between storage period and discharge capacity, and Figure 13 is a graph showing the relationship between charge and discharge cycle ratio and discharge valley amount.
FIG. 14 is a graph showing the relationship between duration ratio and voltage ratio. 6... Aluminum foil/L/ (an example of a blocker), 8
... Electrolyte inlet, 24.25 ... Inner electrode plate patent applicant Yuasa Battery Co., Ltd. Figure 12 Maintenance period (Dou) Ladle red -1-t'5jhi (%)

Claims (1)

[Scope of Claims] (1) The electrolyte inlet of a sealed lead-acid battery without electrolyte injected is blocked by an easily removed blocker to maintain airtightness, thereby preventing oxidation of the internal electrode plates. A ready-to-use sealed lead-acid battery. (2) The negative and anode plates of the sealed lead-acid battery are dry-charged plates in which the porosity of the active material is 50% or more, respectively. Ready-to-use sealed lead-acid batteries as described in Section 1. (8) Thickness T of the electrode plate group of the closed type passenger 'f/K pond, and
The total distance t between the cathode plate and the anode plate is O, 15T≦t≦0
．． The ready-to-use sealed lead-acid battery according to claim 1, characterized in that it has a relationship of 5T.