JPH0760696B2 - Sealed lead acid battery - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a sealed lead-acid battery.

Conventional technology and its problems The molded plastic battery case is used for the sealed lead-acid battery. For example, the battery container for 12V, 10Ah battery consists of 6 battery chambers that can store the electrode plate group of 10Ah capacity. . By connecting adjacent positive electrodes and negative electrodes in parallel using this battery case, 6V, 20Ah battery, 4V, 30Ah battery and 2V, 6V
If a 0Ah battery can be manufactured, it is very effective because it does not require a new battery case frame.

In such a battery, it is more cost-effective to maintain an independent airtightness for each battery and to install a safety valve on the top with a hole in the partition wall between each battery chamber, compared to the case where safety valves are installed on all batteries. It is advantageous from the point. However, due to the difference in the sealing efficiency of the electrode plates, a battery with a structure in which the battery chambers have gas phase continuity and the electrolyte of each electrode plate is not connected is used especially at high temperatures. In such a case, a battery chamber in which water in the electrolytic solution is significantly lost and a battery chamber in which the amount of water in the electrolytic solution is remarkably increased are generated, resulting in a decrease in battery capacity. As a method of preventing this, if a hole is made in the lower part of the partition wall, the electrolytic solution is stored at the bottom of the battery and the electrode plate group is immersed, the continuity of the electrolytic solution between the battery chambers is maintained, and the above problems are solved. However, in this method, since there is a flowing electrolyte in the battery, the important feature of the sealed lead-acid battery is that the electrolyte dilute sulfuric acid does not leak even if it is used in any direction by making the electrolyte non-fluidized. It will be.

Means for Solving the Problems The present invention solves the above-mentioned drawbacks and provides a sealed lead-acid battery that does not have a fluid electrolyte and has excellent durability even when used for float charging under high temperature. To do. That is, by arranging a porous body in the lower part between the battery chambers used in parallel to absorb and retain the electrolytic solution,
The electrolyte solution between the electrode plates used in parallel connection is made continuous to prevent the non-uniformity of the electrolyte solution amount between the batteries as described above and improve the life performance.

Embodiment An embodiment according to the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a main part of a sealed lead-acid battery of the present invention. . Reference numeral 6 denotes a porous body arranged through the lower part of the partition wall to maintain the continuity of the electrolytic solution between the electrode plates in the sealed lead-acid battery without fluid by contacting with the porous separator in each battery chamber. There is.

The figure shows the case where all 6 battery chambers are used in parallel to make a sealed lead-acid battery of 2V.
In the case of producing a 6V battery, the electrolyte solution of three or two electrode plates used in parallel may be made continuous by the same method.

FIG. 2 is a 2V, 60A according to the present invention having the structure shown in FIG.
h This is a comparison of the transition of the battery capacity when the sealed lead-acid battery a is float-charged at 2.275 V in an atmosphere of 45 ° C. and the conventional sealed lead-acid battery b in which the electrolytic solution is not connected at the bottom.

As is clear from the figure, the sealed lead-acid battery of the present invention, which prevents the imbalance of the amount of electrolyte solution between the battery chambers, has an excellent float life performance under high temperature.

EFFECTS OF THE INVENTION As described above, the sealed lead acid battery of the present invention has an advantage that the float life performance under high temperature can be improved even if the electrode plate groups housed in a plurality of battery chambers are used in parallel.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a sealed lead acid battery of the present invention, and FIG. 2 is a diagram showing a capacity transition of a sealed lead acid battery of the present invention and a conventional sealed lead acid battery under a high temperature float test. 1 ... Positive electrode plate, 2 ... Negative electrode plate, 3 ... Porous separator, 4
...... Partition for partitioning each battery compartment, 5 ...... Battery container, 6 ...... Porous body arranged through the lower part of the partition, a ...... Invention product,
b ... Conventional product

Claims (1)

[Claims] 1. A structure having a positive electrode plate, a negative electrode plate and a porous separator absorbing and holding an electrolyte solution, wherein the positive electrodes of a group of electrode plates housed in a plurality of battery chambers are connected and the negative electrodes are connected to each other. In a battery with a connected structure, the battery chamber that houses the electrode plates connected to each other between the positive electrode and the negative electrode should have a continuity of electrolyte solution under the electrode plates using a porous body. A sealed lead acid battery characterized by being constructed.