JPS61107660A - Sealed type battery - Google Patents

Abstract

PURPOSE:To prevent short and stabilize a form of a battery by welding a metal pipe core to a current collector at one end of lithium negative electrode, and inserting the tip of the core into an anode output terminal and welding them to seal a battery. CONSTITUTION:A core 11 is welded to a current collector 9. The core 11 is made of a metal pipe and its winding part is formed so as to have holes or in a porous metal for easy electrolyte pouring. An electrode group 2 prepared by winding around the core 11 is accommodated into a container 1, and the core 11 is inserted into an anode output terminal 8 which is mounted to a battery cover 6, then the core 6 is sealed. Thereby, short caused by a current collector terminal and welding defective of the output terminal and current collector terminal are eliminated and a form is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure of current collecting terminals of plates in sealed batteries such as lithium-oxyhalide batteries.

BACKGROUND OF THE INVENTION A conventional seed battery will be explained with reference to FIGS. 8 and 9. A stainless metal foil 4 attached to one end of a lithium negative electrode 3 is wrapped around the center of an electrode group 2 consisting of an anode, a cathode, and a separator that insulates them, which is housed in a metal storage can 1. There is. A cathode terminal 5 made of nickel metal foil is separately attached to the lithium negative electrode 3, and the cathode terminal 5 is sealed and held by a ceramic 7 in the center opening of the battery lid 6, and is connected to a pipe-shaped output terminal 8 ( : Welded. The cathode output terminal 8 also serves as an injection port for the electrolyte into the battery. 9 is a nickel current collector plate fixed to the center of the lithium negative electrode 3; 10 is the electrode group 2; The anode terminal is attached to the anode of the storage can 1 and is welded to the side surface inside the storage can 1.

Problems to be Solved by the Invention The battery having the above structure has disadvantages in that the shape of the electrode at the beginning of winding may be distorted or the cathode terminal 5 may become slack, causing a risk of short circuit. In addition, welding the metal foil cathode terminal 5 to the round pipe that is the cathode output terminal 8 has a small contact area between the two (;, it is easy to cause poor contact at the welded part, which may cause the welded part to peel off and cause a short circuit. There was a possibility that this could happen.

The present invention aims to eliminate the above-mentioned drawbacks.

Means for Solving the Problem In order to achieve this objective, a metal pipe (5) (attached by welding) to the current collector plate 9 at one end of the lithium negative electrode 3 as shown in FIG. Then, its tip is passed through the cathode output terminal 8 and sealed by welding.

Effect: This eliminates short circuits caused by sagging that occur when metal foil is used as a cathode terminal. In addition, since the electrode is wound around a metal pipe as a core, there is no distortion at the beginning of the winding, and the shape is stable.

Example Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 7, the core 11 is welded to the current collector plate 9.

A metal pipe is used for the core 11, but as shown in Figure 5, a hole is made in the part used for winding the core 11, or as shown in Figure 6, that part is made of porous metal and the electrolyte is injected. It is also possible to make it easier. The wick 11 is passed through the inverter 8, which is wound around the wick 11 and has an electrode attached thereto, and then the lid is placed. At this time, the external part 1 of the cathode output terminal 8 is as shown in FIG.
Although the core 11 protrudes, it may be passed through the cathode output terminal 8 so that the core 11 does not protrude outside the cathode output terminal 8 as shown in FIG. Also,
As shown in Fig. 4, adjust the cathode output terminal 8 to the thickness of the wick 11, laser weld the wick and the storage can 12, and inject the electrolyte from the opening of the wick 11 to the eight openings for injecting the solution. , the cathode output terminal 8 and the tip of the core 11 are crushed together and welded,
・O Effects of the Invention As described above, the present invention eliminates short circuits caused by the current collector terminal of the electrode plate and welding defects between the battery output terminal and the current collector terminal, and the electrode This is of great industrial value in that it also improves the collapse of the electrode plate due to rI at the beginning of winding the group, and improves the safety and reliability of the battery.

[Brief explanation of the drawing]

Fig. 1 is a cutaway diagram of the main parts of a lithium thionyl chloride battery showing one embodiment of the present invention, Fig. 2 is an enlarged view of the main parts of this embodiment, and Figs. 3 and 4 are the main parts and other parts. An enlarged view showing an example of
FIG. 5 is an enlarged view of the core of this embodiment, FIG. 6 is an enlarged view of another example of the core, FIG. 7 is a front view of the lithium battery of this embodiment, and FIG. 8 is a conventional lithium battery. A cutaway diagram of the main parts of a thionyl chloride battery, and Fig. 9 is a front view of a conventional lithium negative electrode. Cathode output terminal, 11 is the core

Claims (1)

[Claims] An electrode group consisting of a cathode, an anode, and a separator that insulates them is housed in a metal container, and the battery has an output terminal insulated with ceramic or glass, which also functions as a current collector terminal and an electrolyte inlet. A sealed battery characterized by having a pipe-shaped electrode winding core on the electrode plate.