JPS6338531Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a cylindrical battery having a structure in which positive and negative electrodes are arranged concentrically with a separator in between.

Prior Art The conventional structure of this type of battery will be explained based on FIG. 1. A is a battery container that also serves as a positive electrode terminal and has a cylindrical positive electrode b formed by molding a positive electrode mixture on its inner surface, and c is a hollow space for the positive electrode B. A battery container lid which also serves as a negative electrode terminal is electrically connected to a negative electrode e disposed in a portion via a separator d via a lead plate f, g is an insulating packing that isolates the battery container a and the container lid c.

Problems to be solved by the invention In the conventional battery shown in FIG. Since the positive electrode mixture is formed by molding the positive electrode mixture, the upper surface of the positive electrode is particularly prone to collapse, and the positive electrode mixture falls off, causing the negative electrode e.
There is a risk of a short circuit due to contact with the

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems in conventional batteries, and its gist is to provide a unipolar terminal with a cylindrical unipolar electrode disposed on the inner surface. A battery container that also serves as a dual-purpose battery container, a battery container lid that also serves as a terminal of the other polarity that is electrically connected to the other polarity electrode placed in the hollow part of the unipolar electrode via a separator through a lead plate, and the container lid and the electrode body. and an insulating cylindrical body disposed in a gap between the electrodes, the cylindrical body having an annular pedestal part that covers the upper surface of the unipolar electrode, and an outer peripheral rising edge of the pedestal part that surrounds the lead plate. The present invention proposes a cylindrical battery characterized by having: and a vertical lower edge of the inner circumference of the pedestal portion that is fitted into the hollow portion of the unipolar electrode.

Embodiment An embodiment of the present invention will be described in detail below, using a cylindrical organic electrolyte battery as an example, with reference to FIGS. 2 and 3.

Reference numeral 1 denotes a battery container which also serves as a positive electrode terminal, and a cylindrical positive electrode 2 formed of a positive electrode mixture containing manganese dioxide as an active material is disposed on its inner surface.
A lithium negative electrode 3 is placed in the hollow part of the positive electrode 2 with a separator 4 interposed therebetween, and the end of the negative electrode lead plate 5 is fixed by spot welding to the inner bottom surface of a battery container lid 6 which also serves as a negative electrode terminal. 7 is battery container 1
This is an insulating packing that isolates the container lid 6 from the container lid 6.

Reference numeral 8 denotes an insulating cylindrical body disposed between the battery container lid 6 and the electrode body, and this insulating cylindrical body 8 includes an annular pedestal portion 81 that covers the upper surface of the positive electrode 2 and a negative electrode lead plate. an outer circumferential rising edge 82 of the pedestal surrounding the positive electrode 5 and an inner periphery rising lower edge 83 of the pedestal that is fitted into the hollow part of the positive electrode 2
and has.

Effects of the invention According to the battery structure of the present invention, in the gap between the battery container lid and the electrode body, there is provided an annular pedestal portion that covers the upper surface of the unipolar electrode, and an annular pedestal portion surrounding the pedestal portion that surrounds the lead plate of the other polarity electrode. Since an insulating cylinder having an upper edge and a lower edge on the inner periphery of the pedestal that is fitted into the hollow part of the unipolar electrode is provided, the upper edge of the outer periphery of the pedestal allows the lead plate of the other polarity electrode to become unipolar. It is possible to prevent the cylindrical unipolar electrode from coming into contact with the battery container that also serves as a terminal, and the upper surface and upper inner surface of the cylindrical unipolar electrode are protected by the pedestal part and the vertical lower edge of the pedestal part's inner periphery, thereby preventing the electrode from collapsing. Battery internal short circuits can be effectively prevented.

Further, since the insulating cylinder is provided with a vertical lower edge on the inner circumference of the pedestal part which is fitted into the hollow part of the cylindrical unipolar electrode, there is also an advantage that the insulating cylinder can be reliably positioned when being incorporated into the battery.

In this example, an organic electrolyte battery was used as the battery system, but it is obvious that other alkaline batteries are also applicable.

In addition, although only the case of a positive electrode was described in the example as a cylindrical unipolar electrode, the invention is not limited to this, and in short, any cylindrical battery in which the positive and negative electrodes are arranged concentrically can be applied. It is something.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional battery, FIGS. 2 and 3 are related to the present invention, and FIG. 2 is a vertical cross-sectional view of the battery of the present invention.
FIG. 3 shows perspective views of the insulating cylinders. 1...Battery container, 2...Positive electrode, 3...Negative electrode, 4
... Separator, 5 ... Negative electrode lead plate, 6 ... Battery container lid, 7 ... Insulation packing, 8 ... Insulation cylinder, 81 ... Pedestal part, 82 ... Peripheral rising edge of pedestal part, 83 ... Lower edge of inner circumference of pedestal.

Claims (1)

[Scope of utility model registration request] A battery container 1 which also serves as a unipolar terminal has a cylindrical unipolar electrode 2 disposed on the inner surface thereof, an other polarity electrode 3 and a lead plate 5 which are arranged in the hollow part of the unipolar electrode 2 with a separator 4 in between. The device includes a battery container lid 6 that is electrically connected and also serves as a terminal of the other polarity, and an insulating cylindrical body 8 disposed in a gap between the container lid 6 and the electrode body. , an annular pedestal part 81 that covers the upper surface of the unipolar electrode 2, an outer peripheral rising edge 82 of the pedestal part surrounding the lead plate 5, and an inner peripheral upright part of the pedestal part that is fitted into the hollow part of the unipolar electrode 2. A cylindrical battery characterized by having a lower edge 83.