JPS59191260A - Enclosed lead storage battery - Google Patents

Abstract

PURPOSE:To improve the reliability by providing an exhaust checking structure having a gap communicating spacially to the exhaust port between a rubber valve and a valve seat thereby preventing inflation of battery jar due to inner pressure rise and deterioration of performance due to insufficient checking. CONSTITUTION:Step is provided on the contacting faces of one or both of a rubber valve 2 and a valve seat 1 to be mounted over an exhaust port 4 to provide a gap 3 coupled spacially with said port 4 between the valve seat 1 and rubber valve 2. Consequently the valve opening force is increased considerably to respond accurately to small variation of cell inner pressure.

Description

[Detailed description of the invention] It is something to do.

Conventionally, a check exhaust structure using a rubber valve has been used at the exhaust port of a sealed lead-acid battery, which serves both of the functions of airtightness of the electric rm and discharge of generated gas.

However, in some of these structures, the rubber valve comes into close contact with the valve seat when left unused, and even if the 11c pond Uchida exceeds the predetermined opening pressure, the valve does not respond and the battery case swells. On the other hand, if the airtightness was insufficient, foreign troops could flow into the area within 1 meter, causing oxidation of the negative electrode plate, which often caused problems.

The reason for this is that in order to maintain airtightness with a rubber valve, it is desirable for the valve and valve seat to be in close contact with each other over as wide an area as possible, but if left unused for a long period of time, the rubber valve and valve seat may get stuck and become difficult to open. On the other hand, if you reduce the area of contact between the rubber valve and the valve seat in order to avoid this phenomenon, there will be more chances for people to become intoxicated.

The present invention provides the above-mentioned check-exhaust structure for sealed lead-acid batteries.
The purpose of EFI is to improve the problems caused by the valve seat and the rubber valve, and to obtain a stable one-opening characteristic and a reliable non-return effect. By providing this gap so that the battery internal pressure is applied to the entire gap, rather than just the exhaust port area, the opening force of the valve increases dramatically, and even a small change in internal pressure It is possible to realize the characteristic of being a timid woman who responds appropriately.

The present research will be specifically explained below with reference to the drawings.

FIG. 1 shows an embodiment of the check exhaust structure of a sealed lead acid battery according to the present invention, and FIG. 2 shows an example of the check exhaust structure of a conventional sealed lead acid battery. The first
In the figures and FIG. 2, ▪ is a valve seat, 2 is a rubber valve, and 3 is a gap provided between the valve seat I and the rubber valve 2, which is provided so as to spatially communicate with the exhaust port 4. 5 is a rubber valve holder.

In the embodiment of the present invention shown in FIG. 1, the gap 3 is formed by providing a step on the surface of the rubber valve 2 that is in contact with the valve seat 1, but in addition to this, the surface of the valve seat 1 that is in contact with the rubber valve 2 is Alternatively, a gap corresponding to the gap 3 in FIG. 1 may be provided by providing a step between the valve seat and the rubber valve 2 where they contact each other.

Now, assuming that the battery internal pressure is P, the valve opening force applied to the rubber valve 2 is F+ (valve opening force) = πM in the embodiment of the present invention shown in FIG.
In the conventional example shown in Fig. 2, F2 (valve opening force) =
2 haP is expressed, F + Ha 1! In other words, the valve opening force in the embodiment of the present invention is much larger than that in the conventional example. Since it can respond to small changes, the contact area between the valve seat 1 and the comb valve 2 can be selected at each corner where the rubber valve can be opened and closed once.

Next, we tested one 715 of the embodiment of the present invention shown in Fig. 1 and the conventional check exhaust structure shown in Fig. 2.
Air is supplied to this end at a constant speed, and the valve opening characteristics are examined. ) V (shown. In the conventional example, there is a large difference between the valve opening king and the subsequent foot valve exhaust king and the characteristics are unstable, but in the embodiment of the present invention, there is almost no difference and the characteristics are very stable. One piece.

As shown below, the sealed type electric oil of the present invention has a reverse +h lid air pattern that exhibits stable opening characteristics and a perfect check effect. The tank does not swell, and there is no performance deterioration due to non-return failure, so reliability is guaranteed.

[Brief explanation of the drawing]

The first factor is a vertical cross-sectional view and a partially cutaway top view showing one embodiment of the check discharge structure of the sealed lead acid battery of the present invention, and Figure 2 shows one example of the check discharge structure of the conventional sealed lead acid battery. It is a valve opening characteristic diagram of a non-return exhaust structure. ■・・・Valve seat, 2...Rubber valve, 3...
····gap. 4...Exhaust port, 5...Rubber valve holder, IFIJ ga2a whistle 3rd

Claims (1)

[Claims] In a sealed lead-acid battery that has a structure in which a rubber valve is attached to the exhaust port to provide a non-return exhaust effect, one or both of the rubber valve and the valve seat should have a step on their contact surfaces. 1. A sealed lead-acid battery characterized by having a check exhaust structure in which a rubber valve and a valve seat are connected to an exhaust port with a gap provided between the chambers.