JPH0982316A - Organic electrolyte battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the amount of blanking residue of metal lithium in a manufacturing process by cutting out a lithium wire material in such length that the specified weight is obtained to use in a negative electrode. SOLUTION: A positive electrode 2 has manganese dioxide as the main constituting element, and a negative electrode 4 is formed with a material doped with metal lithium. The negative electrode 4 is formed by cutting out the wire material of metal lithium 4 in such length that the specified weight is obtained. Three types of the lithium wire material deformed in the specified shape, rod- shaped lithium having a circular cross section, and pressed shape lithiuun formed by using circular container while the outer shape is regulated are used. Lithium is placed so that the cut surface 7a comes in contact with a negative can 5, and pressed against the negative can 5. Yield of lithium in the production process is increased to almost 100% and industrial advantage is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electrolyte battery which uses metallic lithium or a substance doped with lithium for a negative electrode. The present invention is an organic electrolyte battery in which metal lithium or a substance doped with lithium is used as a negative electrode, and a metal oxide or an organic material is used as a positive electrode, wherein the lithium is incorporated in a state of metallic lithium, wherein: It reduces the amount of metal lithium punched out as much as possible and saves metal lithium.

[0002]

2. Description of the Related Art Conventionally, a circular sheet shown in FIG. 9 has been cut out from a flat metal lithium sheet as shown in FIG.

[0003]

However, the conventional organic electrolyte battery has a defect in which metal lithium punching dust is generated in the manufacturing process thereof.

[0004]

The present invention provides the following means for reducing the punching residue of metallic lithium.
According to a first aspect of the present invention, a metallic lithium wire rod is cut into a predetermined weight and disposed.

According to a second aspect of the present invention, lithium pieces cut out from rod-shaped metallic lithium are incorporated into an organic electrolyte battery. Claim 3 provides a means for shaping the incorporated lithium into the required shape of the incorporated battery, wherein the cut lithium is placed in a container of the required shape and the shape of the outer periphery is defined by the container. While regulating the above, the negative electrode can or the substance doped with lithium is pressed to deform the lithium into the required shape and dispose the lithium in the battery.

[0006]

In the conventional method, since the lithium to be supplied is cut out as a circular one from the square portion, it is necessary to use the raw material lithium sheet at a yield of 79% or more from the area ratio of the square and the circle inscribed in the square. That is theoretically impossible. In the present invention, it is apparent from the above description that the lithium as a raw material is used in almost 100% in both the means of claim 1 and claim 2.

Further, by pressing while controlling the outer shape, it is possible to create a shape suitable for the shape of the battery to be incorporated, such as a cylindrical shape or a quadrilateral shape, from a wire rod or a rod having an arbitrary shape. It is also obvious that it is advantageous.

[0008]

EXAMPLES Examples of the present invention will be described below. [Example 1] Lithium battery CR2 using the method of the present invention
032 was produced. The cross-sectional shape is shown in FIG. Reference numeral 1 is a positive electrode can, 2 is a positive electrode, and manganese dioxide is a main component, 3 is a separator, 4 is a negative electrode and is made of metallic lithium, 5 is a negative electrode can, and 6 is a gasket. The electrolytic solution is an organic electrolytic solution composed of propylene carbonate in which lithium perchlorate is dissolved and dimethoxyethane.

The lithium used is the one obtained by deforming the lithium wire rod shown in FIG. 5 into the shape shown in FIG. 6, the rod-shaped rod having a circular cross section shown in FIG. 3, and the lithium wire rod pressed by a circular container while controlling the outer shape. There are three types of shapes shown in FIG. Lithium of the method shown in FIG. 3 was placed such that the cut surface shown in FIG. 4 was in contact with the negative electrode can and pressed against the negative electrode can.
The surface immediately after being cut out had good bondability to the negative electrode can without oxidation of the surface due to air and adhesion of impurities.

The three types of CR2032 of the present invention were compared with the conventional product in terms of capacity, but all were about 183 mAh and no significant difference was observed. [Example 2] A polyacene lithium battery SL621 was manufactured using the method of the present invention. The sectional shape immediately after assembly is shown in FIG. After a lapse of time after assembling, the shape becomes the same as that in FIG. Reference numeral 2 is a positive electrode, 4b is a material doped with lithium, and both 2 and 4b have polyacene as a main constituent element. The electrolytic solution is an organic electrolytic solution in which lithium perchlorate is dissolved in propylene carbonate. Other components are the same as CR2032. SL6
In the case of No. 21, lithium was doped into polyacene and did not retain its shape, and the characteristics of both the conventional one and the present invention were not changed.

[0011]

According to the present invention, it is clear that the yield in the production of lithium is close to 100%, which is industrially advantageous over the conventional method which cannot theoretically exceed 79%.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of an organic electrolyte battery of the present invention.

FIG. 2 is a cross-sectional view showing an example of a state where the negative electrode of the present invention is a lithium-doped material, immediately after battery assembly.

FIG. 3 is an example of a metallic lithium rod used in the battery according to claim 2 of the present invention.

4 is a diagram showing a lithium piece cut out from the metallic lithium rod shown in FIG.

FIG. 5 is an example of a metallic lithium wire used in the battery of the present invention.

FIG. 6 is a view showing a shape of a lithium wire rod used in Example 1 of the present invention when assembled.

7 is a diagram showing the shape of lithium after the lithium cut out from the lithium wire rod shown in FIG. 5 is regulated in outer shape by a cylindrical container and pressed.

FIG. 8 is a plan view of conventionally used lithium molding.

9 is a view showing a lithium piece cut out by the method of FIG. 1 positive electrode can 2 positive electrode 3 separator 4 negative electrode 4a metallic lithium 4b lithium-doped substance 5 negative electrode can 6 gasket 7 cutout portion 7a cutout surface 7b opposite surface of cutout surface

Claims (3)

[Claims] 1. An organic electrolyte battery comprising a negative electrode made of metallic lithium or a substance doped with lithium and an organic electrolyte, wherein the negative electrode is cut from a metallic lithium wire rod to a length of a predetermined weight. Is an organic electrolyte battery. 2. An organic electrolyte battery, characterized in that rod-shaped metallic lithium is cut out to a predetermined weight and disposed. 3. An organic electrolyte battery in which the lithium is placed in a container having a shape required in the battery and pressed against a negative electrode can or a material to which lithium is doped.