Sodium-sulfur cell and method of joining solid electrolyte tube

Details Sodium-sulfur cell and method of joining solid electrolyte tube Sodium-sulfur cell and method of joining solid electrolyte tube

1991-10-07

1993-03-23

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Fluid active material or two-fluid electrolyte combination...

Active material in molten state

296232, H01M 1039

Patent

active

051962772

ABSTRACT:
An excellent stable sodium-sulfur cell having a high mechanical strength and a very long life is provided. The cell eliminates formation of cracks in a joining portion of the solid electrolyte tube and the insulative ring of the cell with the aid of a solder glass filled in a gap between the solid electrolyte tube and the insulative ring, preferably with the aid of a tapered portion formed at at least one of the solid electrolyte tube and the insulative ring, thereby to completely obviate a direct reaction of active substances of the positive electrode and the negative electrode, overheating and destruction of the cell. The sodium-sulfur cell, includes a solid electrolyte tube, an insulative ring, a gap of 100-500 .mu.m formed between the solid electrolyte tube and the insulative ring, and a solder glass filled in the gap for joining the insulative ring to the solid electrolyte tube.

REFERENCES:
patent: 4074026 (1978-02-01), Bones
patent: 4590136 (1986-05-01), Buehler et al.
patent: 4770956 (1988-09-01), Knodler

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