JPS6048864B2 - Anode plate for lead acid battery - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in anode plates for lead-acid batteries.

Traditionally, lead-acid batteries using paste-type electrode plates had a structure in which the anode plate was placed between flat glass mats, but as the life of the anode active material progresses and the anode active material becomes finer, it passes through the mesh of the glass mat. The active material fell off, significantly impeding battery life performance. Furthermore, short circuits due to blistering of the fallen active material and cathode active material significantly impaired battery life performance. A clad lead-acid battery has been proposed as a structure to eliminate the above drawbacks, but it has drawbacks such as a very complicated process and high manufacturing cost.

The present invention eliminates the above-mentioned drawbacks and provides an anode plate for a lead-acid battery which employs the advantages of the clad type structure, and which simplifies and automates the process and is inexpensive. Next, one embodiment of the present invention will be described.

Active material holding membrane plate 1 After impregnating a thermoforming binder such as phenol resin, resin emulsion, gelatin, etc. into a glass woven cloth, glass mat, synthetic resin separator, etc. 8
Thermoforming at 0'C to 230C.

One active material holding film welding rib 2 such as a resin film, powdered resin, resin monomer, etc. is thermally welded onto the thermoformed active material holding film 1, and then a paste-like seasickness material 3 is filled.
The seasick material 3 is inserted into the lead base ear portion 4 and the lead base body 5, and then the other active material holding film welding rib 2 is heat welded. By applying pressure between the active material retaining film welding rib 2 and the active material retaining film 1 during thermal welding, the molten resin permeates the active material surface and the welding between the active material retaining film welding rib 2 and the active material retaining film 1 becomes strong. It is possible to pressurize seasick monster 3. Thereafter, a resin mold 6 is formed on both ends of the rear electrode plate by injection molding after cutting into desired dimensions, and a seasick object 3 is formed by the resin mold part 6, the active material retaining film 1, and the active material retaining film welding rib 2. It is completely integrated with the lead base 5 and coated. According to the present invention, the following features are provided.

1. Since the lead-acid battery according to the present invention can prevent the active material from falling off and short-circuiting, the lead-acid battery life performance 5 is improved by two to three times compared to the conventional paste type lead-acid battery. 2. The grid of conventional paste-type lead-acid batteries requires a large amount of wasteful lead in the outer frame in order to maintain the strength of the electrode plates.
In the electrode plate of the present invention, the strength of the electrode plate can be maintained by the active material holding film welded ribs, and lead can be effectively and significantly reduced, and the lead base can be sufficiently pressurized with lead oxide. Because it is made of aluminum, there is less corrosion and the life of the lead base is improved.

3. Since the strength of the electrode plates can be maintained by the welded ribs of the active material holding film, it is possible to use low antimony alloys or pure lead bases, and it is possible to manufacture storage batteries with extremely low self-discharge.

4. The lead-acid battery according to the present invention is most suitable as a lead-acid battery for electric vehicles, forklifts, kayaks, etc., which are used for deep charging and discharging.

5. The present invention is most suitable as a thin electrode plate because the active material holding film has grooves having an inverted trapezoidal cross section.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the anode plate for a lead-acid battery according to the present invention, Fig. 2 is a sectional view taken along the line A-A' in Fig. 1, and Fig. 3 is a thermoformed anode plate. FIG. 2 is a cross-sectional view showing a state in which the active material holding film and the active material holding film welded ribs, which are thermally welded at the same time as or after thermoforming, are integrated. 1 is an active material holding film, 2 is an active material holding film welded rib, 3 is lead oxide, and 5 is a lead base.

Claims (1)

[Claims] 1. Two active material holding films treated with a binder and provided with a plurality of grooves having an inverted trapezoidal cross section are stacked with the grooves inside, and the active material holding film welding ribs provided in the portion other than the grooves are opposed to each other. 1. An anode plate for a lead-acid battery, characterized in that the surfaces of the anode plate are fixed to each other and the lead base body inserted into the integrated groove holds a lead oxide filled therein.