JPH04296466A - Sealed-type lead-acid battery - Google Patents

Abstract

PURPOSE:To stabilize the capacity and the life of a battery and prevent defects owing to pin holes by setting a synthetic resin frame in the outside of a film made of synthetic resin. CONSTITUTION:A group of electrode plates of formed caps containing a retainer composed of one cathode plate, one anode plate, and glass fiber and a safety valve part is wrapped with a film made of synthetic resin. Then, an electrolyte is poured to prepare an elemental battery. Five, for example, of the elemental batteries are stacked in series and pressed by a synthetic resin from to give a combined battery. With this structure, stacking is carried out easily and since the pressure is applied to the whole of the electrode plates, the capacity and the life of the battery are stabilized. Moreover, the defects owing to pin holes easily formed in the manufacturing process can be prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in sealed lead-acid batteries used as power sources for portable equipment and the like.

0002

[Prior Art] Conventionally, a group of electrode plates consisting of a positive electrode plate, a negative electrode plate, and a retainer made of a glass fiber non-woven fabric was wrapped in a synthetic resin film to form a unit cell, and when these were stacked in the same direction, metal The entire body is pressurized with a case made of
It was used as a battery.

0003

[Problems to be Solved by the Invention] Since the above-mentioned battery uses a soft synthetic resin film as a battery case, there is a very high risk that pinholes and the like will occur during manufacturing. Furthermore, when stacking, the side fittings are folded and housed in a metal pressurizing case, but this method is difficult to manufacture and has the disadvantage that the pressurizing force tends to be uneven.

0004

[Means for Solving the Problems] In the present invention, a synthetic resin frame is placed outside the synthetic resin film, making it easier to stack batteries, applying pressure uniformly to the entire electrode plate, and improving manufacturing efficiency. This makes it difficult for pinholes to occur.

[0005]

[Operation] The synthetic resin frame placed outside the synthetic resin film applies pressure to the entire electrode plate, which stabilizes the battery capacity and life. Also, defects caused by pinholes that tend to occur during manufacturing are completely eliminated.

[0006]

[Example] An example of the present invention will be described. Anode plate 1
A group of electrode plates consisting of one cathode plate, a molded cap including a retainer made of glass fiber and a safety valve part is wrapped in a synthetic resin film, and five unit cells injected with electrolyte are stacked in series using synthetic resin. Pressure was applied using the frame to form an assembled battery.

[0007] This assembled battery was subjected to 1A constant current discharge (final voltage 8.7V), 3.5 hours, and 12.35V constant voltage charge (
A cycle life test was conducted at a limited current of 1.6 A). The results are shown in Figure 1. In FIG. 1, (A) shows a lead-acid battery of the present invention, and (B) shows a conventional lead-acid battery.

From FIG. 1, compared to the conventional lead acid battery (B),
It was confirmed that the lead-acid battery (A) of the present invention has stable battery capacity and less variation in life.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the life test results of a lead-acid battery of the present invention and a conventional lead-acid battery, in which (A) shows the lead-acid battery of the present invention and (B) shows a conventional lead-acid battery.

Claims (3)

[Claims] Claim 1: In a sealed lead-acid battery that is made into a unit cell by wrapping an electrode group consisting of a positive electrode plate, a negative electrode plate, and a retainer separator in a synthetic resin film and injecting an electrolyte, a synthetic resin film is formed around the synthetic resin film. A sealed lead-acid battery characterized by having a resin frame. 2. A sealed lead-acid battery characterized in that a synthetic resin frame is arranged around the outside of one battery in which a plurality of batteries are stacked in the same direction. 3. A sealed lead-acid battery characterized in that a synthetic resin frame is arranged around the outside of one battery arranged in plurality on the same plane.