JPH0362455A - Preparation of electrode of ni-cd secondary battery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for producing Ni--Cd storage battery plates, in particular paste-type plates.

2. Description of the Related Art Conventionally, in the production of Nt--Cd storage battery electrode plates, there is a method disclosed in Japanese Patent Publication No. 37177/1983. That is, as shown in FIG. 2, a long core material 1 is placed in a slurry I72 in which electrode active material powder is dispersed in an aqueous thickener solution.
is continuously passed through and pulled up from between the slitter 3, and the slug U 2 is attached to both sides of the core material l.

Problems to be Solved by the Invention In the above-described manufacturing method, since a slurry-like active material is applied to the core material, it is difficult to increase the capacity of the battery. On the other hand, it is possible to increase the capacity by using a compacted paste-like active material, but in this case, the fluidity of the paste-like active material becomes low due to compaction, making it difficult to apply it to the core material. Become something. Further, when applying the paste active material to the core material, free moisture generated from the paste active material lowers the retention strength of the active material applied to the core material. As a result, when winding the electrode plates to form an electrode plate group, a large amount of active material is lost, making it difficult to commercialize the product.

The problem of the present invention is to apply a paste-like active material to a core material so that N
The object of the present invention is to facilitate the manufacture of the electrode plates of i-Cd storage batteries and to increase the retention strength of the active material applied to the core material.

Means for Solving the Problems In order to solve the above problems, the manufacturing method according to the present invention introduces a paste-like active material into the gap between a pair of rolls and forms it into a sheet, and also forms the active material formed into a sheet. along the circumferential surface of one of the pair of rolls. Further, the active material along the circumferential surface of the roll is pressed against the elongated core material and applied to the core material. The present invention is characterized in that, of the pair of rolls, the temperature of the roll that forms the surface to be applied to the core material of the active material is increased.

Function: When a paste-like active material is formed into a sheet shape between a pair of rolls, free moisture on the surface of the active material formed in contact with the high-temperature roll surface is evaporated and removed. The active material formed into a sheet will selectively adhere to and follow the peripheral surface of the roll with a lower temperature, and the surface from which free moisture has been removed will adhere to the core material, causing the active material to adhere to the core material. Since coating is performed, the retention strength of the active material can be increased.

Example Next, an embodiment of the present invention will be described with reference to FIG.

A paste-like active material 6 is introduced into the gap formed by the low-temperature roll 4 and the high-temperature roll 5, and is formed into a sheet 1. The active material formed in contact with the surface of the high-temperature roll 5 is evaporated and removed due to the high temperature of free moisture on the surface, and the formed surface on the opposite side selectively adheres to the circumferential surface of the low-temperature roll 4. .

The sheet-like active material adhered to the circumferential surface of the low-temperature roll 4 is applied by pressing onto the long core material 1.
Two sets of tickets are prepared for the combination of and high-temperature roll 5, and low-temperature roll 4
They are arranged close to each other, and the core material 1 is introduced into the gap between them. In this way, the compacted paste-like active material can be applied to both surfaces of the elongated negative phase 1 after removing its free water.

Effects of the Invention As described above, in the production method according to the present invention, a compacted paste-like active material with low fluidity is formed into a sheet shape, which improves workability (can be applied to a core material). , the active material can be applied to the core material with free water removed.
The holding power of the active material is also large and it is possible to prevent the active material from falling off.

[Brief explanation of drawings]

FIG. 1 is an explanatory side view showing one embodiment of the manufacturing method according to the present invention, and FIG. 2 is an explanatory side view showing a conventional manufacturing method. 1 is a core material, 4 is a low temperature roll, 5 is a high temperature roll, 6 is a paste active material

Claims (1)

[Claims] 1. A paste-like active material is introduced into the gap between the pair of rolls and formed into a sheet, and the active material formed into the sheet is placed along the circumferential surface of one of the rolls of the pair of rows, Furthermore, there is a method in which the active material along the circumferential surface of the roll is pressed against a long core material and applied to the core material, and the surface of the pair of rolls that is to be applied to the core material of the active material is formed. A method for producing a Ni--Cd storage battery electrode plate, characterized in that the temperature of the roll is increased.