JPH03184255A - Battery with organic electrolyte - Google Patents

Abstract

PURPOSE:To prevent contacting of the end of a lead plate with a protrusion, which protrudes into a case, and thereby accomplish a battery equipped with high safety by covering the protrusion with a ring-shaped insulating member made of resin. CONSTITUTION:A protrusion 1a provided in the upper case of a battery supports a ring-shaped insulating member 9 made of resin and an assembly seal 6 with a ring-shaped resin gasket 2 interposed. The top of the case is bent inward and caulked fast to the assembly seal plate 6 through the ring-shaped insulating member 9 and ring-shaped gasket 2 followed by sealing process to provided air-tightness. Thereby the ring-shaped insulating member 9 insulates the protrusion into the case from the end of a lead plate 4, so that eventual deformation of the end of the lead plate 4 due to dropping, etc., is not likely to generate internal shortcircuiting, and the safety of battery can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an organic electrolyte battery, particularly to the structure of a sealing part of a cylindrical battery.

Conventional technology Conventionally, the structure of the sealing part of this type of cylindrical organic electrolyte battery has been to provide a stepped part at the top of the case to support the assembled sealing plate which also serves as the positive electrode terminal, to improve the sealing effect and improve leakage resistance and storage. It was a structure that ensured gender.

FIG. 2 shows a conventional lithium-fluorocarbon type cylindrical organic electrolyte battery. In FIG. 2, reference numeral 1 denotes a nickel-plated iron cylindrical case that also serves as a negative electrode terminal, and a stepped portion 1 on the top of which supports an assembly sealing plate 6 via an annular gasket 2.
A is provided.

The stepped portion 1a is formed by grooving the outer peripheral surface of the case 1 and providing an annular protrusion projecting inward of the case, and 1b indicates the protrusion. 4 is a lead plate that connects the stainless steel filter 6 and the positive electrode by welding, 6 is a nickel-plated iron sealing plate 7 that also serves as the positive electrode terminal, the stainless steel filter 5, and the aluminum foil and polyethylene film. This is an assembled sealing plate that is integrally constructed with the bonded valve body 8.

The case opening is bent inward and caulked to an assembled sealing plate 6 supported on the step part ja of the case via an annular gasket 2, thereby airtightly sealing the case opening.

Problems to be Solved by the Invention Although such a conventional sealing structure has sufficient leakage resistance and retention properties, the end of the lead plate connecting the positive electrode and the assembled sealing plate, which also serves as the positive electrode terminal, However, there was a problem that if the device was dropped, it could come into contact with a protrusion inside the case, causing an internal short circuit. The present invention solves such conventional problems, and aims to provide a battery with high safety by preventing contact between the protrusion protruding inward of the case and the end of the lead plate.

Means for Solving the Problem In order to solve this problem, the present invention covers the protrusion projecting inward of the case with an annular insulator made of resin.

Function: According to this configuration, the resin annular insulator completely insulates the protrusion inside the case and the end of the lead plate, so even if the end of the lead plate is deformed due to falling, etc., the inside will remain intact. This will help improve battery safety without causing short circuits.

Embodiment FIG. 1 shows a battery assembled with a resin-made annular insulator A of the present invention interposed in a stepped convex portion of a case.

The configuration of the present invention will be explained. A stepped portion 1a provided at the top of the battery case supports the assembly sealing plate 6 via a resin annular insulator 9 and a resin annular gasket 2, and bends the upper end of the case inward to form a resin annular insulator 9. The assembled sealing plate 6 is caulked through the annular insulator 9 and the annular gasket 2 to form an airtight seal.

The configuration other than the above and the names and symbols of each part are the same as those in FIG. 2 showing the conventional example, so explanations will be omitted.

Next, a drop test was performed on a battery assembled using the conventional configuration (C) and a battery assembled according to the present invention (B), and the following results were obtained.

<Drop conditions> Height: s m, 3 directions each; 10 times Conventional product (c) 2/100 pieces...Internal short circuit Water Invention product @O/100 pieces...Internal As a result of disassembling batteries (A) i- and (b) after the no-short-circuit drop test, it was found that the conventional batteries that had an internal short-circuit were deformed by the impact of the drop, and the protrusion inside the case and the end of the lead plate were damaged. The parts were touching, causing an internal short circuit.

On the other hand, even if the battery according to the present invention (b) is deformed by the impact of dropping, the protrusion inside the case is covered by the resin annular insulator, so the end of the lead plate Even if they came into contact with each other, no internal short circuits would occur, and the effect of increasing the safety of the battery was achieved.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, even if the battery is deformed due to impact such as being dropped, internal short circuits do not occur and the safety of the battery is improved. This has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an organic electrolyte battery according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a conventional organic electrolyte battery. 1...Case, 1a...Stepped portion, 1b.
... Protrusion, 2 ... Annular gasket, 6.
...Assembly sealing plate, 7...Positive terminal, 9...Annular insulator.

Claims (1)

[Claims] A metal case housing a negative electrode, a positive electrode, and an organic electrolyte each containing a light metal as an active material, an annular gasket supported on a protrusion provided inside the upper part of the case, and caulking of the opening end of the case through the gasket. An organic electrolyte battery comprising a sealing plate attached to an opening of a case, the inside of a protrusion of the case being covered with an annular insulator made of resin.