Abstract: A molten sodium battery includes molten sodium making an anode active material, a cathode active material, a sodium container accommodating the molten sodium therein, a partition wall including an anode chamber in an interior thereof, and a cathode container air-tightly accommodating the cathode active material and the partition wall therein. The molten sodium battery further includes the cathode container including a joint having an Opening communicating an inside of the cathode container with an outside thereof, and the partition wall containing a partition-wall body within the cathode container having a plate shape which contains the anode chamber at around central site thereof in a thickness direction, and a through bore connecting the anode chamber with an outside of the anode chamber, and a head fitted into the opening in the joint and bonded integrally with the partition-wall body which is communicated with the anode chamber by the through bore.

Abstract: A sodium-sulfur battery includes a partition wall formed of a solid electrolyte, a cathode chamber formed on one of opposite sides of the partition wall, an anode chamber formed on another one of the opposite sides of the partition wall, sulfur accommodated in the cathode chamber, sodium some of which is accommodated in the anode chamber, a sodium container accommodating most of remaining sodium, and a communication passage communicating the anode chamber with the sodium container, and including a finely-perforated portion extending into the sodium container and opening inside the sodium container. Moreover, the communication passage further includes a shutoff portion for closing the communication passage itself.

Abstract: A partition wall includes: a partition-wall body arranged within a metallic cathode container, which includes a cylinder-shaped cap communicating the inside with the outside, having a plate shape, which includes: an anode chamber at around the central site in the thickness direction; and a through bore, and made of beta-alumina; and a nipple-shaped head formed integrally with the partition-wall body, including a passage bore which is communicated with the anode chamber by way of the through bore, and attached air-tightly to the cap, and made of a ceramic material.

Abstract: A sodium-sulfur battery includes a partition wall formed of a solid electrolyte, a cathode chamber formed on one of opposite sides of the partition wall, an anode chamber formed on another one of the opposite sides of the partition wall, sulfur accommodated in the cathode chamber, sodium some of which is accommodated in the anode chamber, a sodium container accommodating most of remaining sodium, and a communication passage communicating the anode chamber with the sodium container, and including a finely-perforated portion extending into the sodium container and opening inside the sodium container. Moreover, the communication passage further includes a shutoff portion for closing the communication passage itself.