JPH03208257A - Thin type cell and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a thin type cell of a flexible and excellent sealing property by sealing up the peripheries of sheet-form terminal plates of a positive electrode and a negative electrode opposing through a separator, with a silicon rubber type adhesive. CONSTITUTION:After removing the fat at the peripheries of stainless sheets, they are processed into a positive electrode terminal plate 1 a positive electrode compound 3 is loaded, and a negative electrode terminal plate 2 a negative electrode 4 is loaded, and they are laminated through a separator 5. And a silicon rubber type adhesive 6 is poured between the terminal plates and left at a specific temperature to be hardened. As a result, the peripheries of the terminal plates 1 and 2 are sealed up, and a flexible and an excellent sealing property of thin type cell can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a thin battery and its 11NL method. More specifically, the present invention relates to a method for sealing the peripheral edges of two sr-}-shaped positive and negative terminal plates. It is related to.

Prior Art and its Problems In recent years, portable electronic devices and battery-powered devices have rapidly become smaller and thinner. Accordingly, there is an increasing demand for smaller and thinner batteries used as power sources for these electronic devices.

In particular, thin batteries with a thickness of 0.51111 mm or less that use a light metal such as lithium as a negative electrode active material are often used in card-shaped 11 liter batteries such as XC*1. A power source built into such a card-shaped device is required to have a thin battery, flexibility to withstand bending, and y-μ to withstand long-term use.

Conventionally, polypropylene was used as the s'k' material. However, this Y-7V material has weak adhesive strength with the terminal board and insufficient airtightness at the interface, so it may crack due to bending, and gases such as moisture and oxygen may enter from the interface. The drawback is that battery performance deteriorates during long-term storage or use.

OBJECTS OF THE INVENTION The present invention was made in view of the above-mentioned drawbacks of the conventional art, and an object of the present invention is to provide a thin battery that is flexible and has excellent V-μ properties.

Structure of the Invention In order to achieve the above-mentioned object, the present invention has two S/-}-shaped positive and negative terminal plates, which also serve as current collectors for the positive and negative electrodes, with the positive and negative electrodes facing each other through a separator. Huan,
A negative electrode is arranged, and the shoulder edges of a sheet-shaped positive and negative electrode terminal plate are sealed with an S/recon rubber adhesive.

The details of the present invention are explained below! I! This will be explained in an example. FIG. 1 is a sectional view of the thin battery of the present invention, and FIG. 2 is a diagram comparing the storage performance of the battery of the present invention and a conventional battery.

In the J1!1 diagram, 1 is a stainless steel positive terminal plate that also serves as a positive electrode collection, 2 is a stainless steel negative terminal plate that also serves as a negative electrode current collection stop, and 3 is a positive electrode assembly whose main component is manganese dioxide. 4 is a negative electrode made of lithium, 5 is a solution of lithium perchlorate in propylene carbonate impregnated into polyderobylene holes a or polyderobylene non-woven fabric, or a solution of perdeposited chloride in polyethylene oxide V-doped, etc. Seba V consisting of polymer solid electrolyte film
1 and 6 are silicone rubber adhesives related to the present invention, such as TSE322, 3212.5222 manufactured by Toshiba V Recon Co., Ltd., and suitable for tJL.

Next, a method for manufacturing the thin star battery of the present invention will be explained. First, prepare a stainless steel F-} used for the positive and negative terminal plates in the St-} shape, and after degreasing the periphery, that is, the part to be sealed, with 1,1.1-trichlormethane, the positive electrode is bonded. A positive electrode terminal plate 1 on which the agent 3 is placed and a negative electrode terminal plate 2 on which 12 negative electrodes 4 are placed are laminated via a sebaret I5,
The battery of the present invention can be obtained by injecting the silicone rubber adhesive 6 between each terminal plate and leaving it to harden for one hour at a temperature of about 150°C. In addition, for the above degreasing treatment,
1, t, 1-} 11 Acetone may be used instead of talolomethane, and the positive electrode terminal plate 1 and the negative electrode terminal plate 2
When processing 1 m, the waste part W-8/recon rubber adhesive 6 may be wiped off.

In order to examine the peel strength of the s/wakon rubber-based adhesive 6 used in the above-mentioned **method, one end of two sheets of stainless steel
▲, TSIC3212”lullta E
Prepare material B and material C adhered with TSI5222, and perform Ty# peeling experiment by pulling the other ends of two stainless steel V-} in opposite directions at a temperature of 25°C and a humidity of 4.
When tested at a tensile strength of 10@Ill/min, the peel strength of the additive ▲ was i. 2#/25m, the peeling strength of Feedstock B is 1.2#/25@II, the degree of Illll1 bending of Feedstock 0 is 1.8&a/') E a-f? j − 4
m + − L e jL # m A mC was immersed in the organic solvent used in the battery of the present invention for two months and then subjected to a similar T-peel test, but the peel N strength did not change. Furthermore, without performing degreasing treatment,
Similar T-shaped peeling process was performed for those soaked for 2 months.
When tested, the peel strength of the filler ▲ was Q. 9/2
The peel strength of 5WS additive B was 0.9#/25m, and the peel strength of sample C was 1.5#/25m.0 In contrast, the same grade D was used with modified polydelobyrene as a conventional Y-ru material.
When the peel strength of the latter was 0.84/25-, the peel strength of the latter was 0.84/25-, and the peel strength of the latter was 0.84/25-. The peel strength was 0.41/25 or less. From this, the 4V9 Congo ▲ adhesive M6 used in the present invention can strengthen the adhesion quality and improve the airtightness of the interface.

Next, batteries ▲, B, and 0 of the present invention were manufactured using the yycon rubber therapeutic adhesive 6 used for the above-mentioned ingredients ▲, B, and O, and the batteries ▲, B, and 0 were prepared in the same manner. Modified poly-f-robilene 1re1 used for IK material D
At the banquet noodles n or one hate L1 temperature 40℃, ffiJl!
The change in discharge capacity over time when stored at 90% lower than the initial capacity of 100 is j! ! This is Figure 2. lg2
The figure shows that the battery of the present invention exhibits little deterioration in performance even after long-term storage.

Effects of the Invention As described above, the present invention can provide a thin battery with excellent flexibility and airtightness.

[Brief explanation of drawings]

Figure jg1 is a sectional view of the thin battery of the present invention, and Figure 2 is a diagram comparing the storage performance of the battery of the present invention and a conventional battery.

Claims (3)

[Claims] (1) A positive electrode and a negative electrode are arranged so as to face each other with a separator between two sheet-shaped positive and negative electrode terminal plates that also serve as current collectors for the positive and negative electrodes, and the sheet-shaped positive and negative electrode terminal plates are A thin battery whose periphery is sealed with a silicone rubber adhesive. (2) A method for manufacturing a thin battery, which comprises degreasing the peripheral edges of the sheet-shaped positive and negative terminal plates and then sealing them with a silicone rubber adhesive. (3) The peripheral edge of the sheet-shaped positive and negative terminal plates is degreased with acetone and/or 1,1,4-trichloromethane, and then sealed with a silicone rubber adhesive. 2. A method for manufacturing a thin battery according to item 2.