Molten sodium battery and partition wall for molten sodium battery

2:

• The partition wall for molten sodium battery as set forth in claim 1, wherein:
• the joint has a cylindrical shape;
• and
• the head has a nippled shape attached to an inner peripheral face in the cylinder-shaped joint.

3:

• The partition wall for molten sodium battery as set forth in claim 1, wherein:
• the joint comprises a part including the opening, and an annular attachment face demarcating the opening;
• and
• the head comprises a central part including the passage bore, and another part present around the central part, and including an annular attachment face joined to the attachment face of the joint.

4:

• The partition wall for molten sodium battery as set forth in claim 3, wherein:
• the joint has a hat shape comprising a top-face portion including a part which has the annular attachment face, and a cylindrical walled portion extending downward from a circumferential edge of the top-face portion;
• and
• the head comprises an upper staged portion including the passage bore, and a lower stage portion present around the upper staged portion, and including an annular attachment face joined to the attachment face of the joint.

8:

• A molten sodium battery comprising:
• molten sodium making an anode active material;
• a cathode active material;
• a sodium container accommodating the molten sodium therein;
• a partition wall comprising 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 comprising:
• the cathode container comprising a joint which has an opening communicating an inside of the cathode container with an outside thereof, and made of a metal;
• and
• the partition wall comprising:
• a partition-wall body arranged within the cathode container, having a plate shape, which comprises:
• the anode chamber at around a central site thereof in a thickness direction thereof;
• and a through bore connecting the anode chamber with an outside of the anode chamber, and made of beta-alumina;
• and
• a head fitted into the opening in the joint, formed integrally with the partition-wall body, including a passage bore which is communicated with the anode chamber by way of the through bore, attached air-tightly to the joint, and made of a ceramic material.