JPS6222063Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to organic electrolyte batteries, takes advantage of its excellent leakage resistance, and effectively prevents electrical short circuits between the anode mixture and the cathode material. The purpose is to maintain high performance.

In general, organic electrolyte batteries use an organic electrolyte solution as the electrolyte, a light metal as the cathode active material, and an oxide, halide, sulfide, etc. as the anode mixture, and are lighter than silver oxide batteries etc. In addition, it has been used in many fields in recent years because it can provide high capacity discharge characteristics.

By the way, in this type of battery, as shown in FIG. 2, the cathode terminal plate 21 has a top part 23 in which the cathode agent 22 is filled, and a horizontal part 25 that is connected to the outer periphery of the top part 23 via a step part 24. The horizontal part 25 and the peripheral bent part 26 connect the gasket 27 to the anode can 28.
There is a structure in which a separator 30 of approximately the same diameter as the anode mixture 29, which has a larger diameter than the cathode material 22, is fitted onto the inner circumferential surface 31 of the gasket 27. If a part of the anode mixture 29 collapses due to pressure during sealing or external impact force during use, the part collapses into the separator 30 as shown by an arrow 32.
This has the disadvantage that it leaks to the cathode material 22 side through a small gap between the peripheral edge of the gasket 27 and the inner peripheral surface 31 of the gasket 27, causing a short circuit and deteriorating the performance of the battery.

This idea eliminates the above drawbacks and is as follows:
An embodiment thereof will be described based on the drawings.

In FIG. 1, an anode mixture 1 made of an oxide such as manganese dioxide, a halide, or a sulfide is inserted into the bottom of an anode can 2, and a separator 3 made of a nonwoven polypropylene fabric is placed on top of it. Furthermore, a cathode material 4 containing a cathode active material made of a light metal such as lithium, and an organic electrolyte containing lithium perchlorate or lithium borofluoride in dimethoxyethane, tetrahydrofuran, propylene carbonate, etc. are contained in the top part 5. The peripheral folded portion 14 of the loaded cathode terminal plate 6 and the anode can 2 are fitted together via the gasket 7, and the opening 8 of the anode can 2 is bent inward and sealed.

The separator 3 is formed to have a larger diameter than the anode mixture 1, and its peripheral edge 9 has a horizontal portion 1 that extends to the outer periphery of the top 5 of the cathode terminal plate 6 via a stepped portion 10.
1 and the gasket 7 mentioned above.

As is clear from the above structure, leakage of battery liquid can be completely prevented by the peripheral folded part 14 of the cathode terminal plate 6, and the peripheral part 9 of the separator 3 is located between the horizontal part 11 of the cathode terminal plate 6 and the gasket 7. Since it is clamped and completely fixed, the anode mixture 1 is completely sealed against the cathode agent 4 by the wide upper and lower surfaces 12 and 13 of the peripheral edge 9, so even if a part of the anode mixture 1 Even if it collapses, this part is effectively prevented from leaking beyond the separator 3 to the cathode material 4 side. Thereby, a short circuit between the anode mixture 1 and the cathode material 4 is prevented, and the performance of the battery is maintained at a high level.

In this way, the battery is sealed by the peripheral folded portion 14 formed on the outer periphery of the horizontal portion 11 of the cathode terminal plate 6.
Since the separator is fixed between the horizontal part 11 of the cathode terminal plate 6 and the gasket 7, the fixation of the separator and the sealing of the battery can be done independently of the cathode terminal plate 6. Therefore, short circuit between the anode mixture 1 and the cathode material 4 can be effectively prevented while maintaining the conventional leakage resistance performance.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing an example of an organic electrolyte battery according to this invention, and FIG. 2 is a vertical sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Anode mixture, 2... Anode can, 3... Separator, 4... Cathode agent, 5... Top, 6... Cathode terminal plate, 7... Gasket, 9... Peripheral part, 10...
...Step part, 11...Horizontal part, 14...Peripheral folded part.

Claims (1)

[Scope of utility model registration request] A cathode terminal having a top part 5 filled with a cathode agent 4, a horizontal part 11 connected to the outer periphery of the top part 5 via a step part 10, and a peripheral folded part 14 formed on the outer periphery of the horizontal part 11. In an organic electrolyte battery in which a plate 6 is fitted to an anode can 2 via a gasket 7, a separator 3 interposed between a cathode agent 4 and an anode mixture 1 is formed to have a larger diameter than the anode mixture 1. Then, the peripheral edge part 9 is clamped and fixed between the horizontal part 11 of the cathode terminal plate 6 and the gasket 7, and the gasket 7 is inserted between the peripheral folded part 14 of the cathode terminal plate 6 and the anode can 2. An organic electrolyte battery characterized in that the battery is sealed through an organic electrolyte battery.