A battery pack structure includes a chamber, a cooling duct arranged outside the pack case, and a connector that communicates the chamber and the cooling duct with each other. The connector includes a first opening, which is connected with the chamber in a state of being sealed by a first sealing member, a second opening, which is connected with a cooling duct in a state of being sealed by a second sealing member, a first sealing surface, which is formed in a peripheral part of the first opening and is either a tube-shaped surface or a plane that faces a chamber inlet surface though the first sealing member, and a second sealing surface, which is formed in a peripheral part of the second opening and is a tube-shaped surface or a plane that faces a duct outlet surface through the second sealing member.

The present application provides configurations, components, assemblies and methods for sealing cells of sodium-based thermal batteries, such as NaMx cells. In some embodiments the cells may include an integrated bridge member hermetically sealed to an electrically conductive case and a ceramic collar of the cell to hermetically seal an anodic chamber of the cell. In some embodiments the cells may include the ceramic collar hermetically sealed to an electrolyte separator tube of the cell to hermetically seal the anodic chamber of the cell. In some embodiments the anodic chamber may be defined, at least in part, by the case, integrated bridge member, ceramic collar and electrolyte separator tube. In some embodiments the cells may include a current collector hermetically sealed to the ceramic collar, and a cap member hermetically sealed to the current collector tube to hermetically seal a cathodic chamber of the cell.

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.

Embodiments disclosed herein generally relate to a microporous separator with a pore geometry that creates a low or no tortuosity architecture. In one embodiment, a battery cell may comprise of an anode layer, a cathode layer, and a separator layer positioned between the cathode layer and the anode layer. The separator layer may be comprised of one or more block copolymers. The block copolymers that make up the separator layer may be materials that self-align into a vertical nanostructure. The vertical nanostructures may allow ions within the battery cell to flow in a vertical path between the cathode and anode. This vertical path my create a low or no tortuosity environment within the battery cell.

Embodiments disclosed herein generally relate to a microporous separator with a pore geometry that creates a low or no tortuosity architecture. In one embodiment, a battery cell may comprise of an anode layer, a cathode layer, and a separator layer positioned between the cathode layer and the anode layer. The separator layer may be comprised of one or more block copolymers. The block copolymers that make up the separator layer may be materials that self-align into a vertical nanostructure. The vertical nanostructures may allow ions within the battery cell to flow in a vertical path between the cathode and anode. This vertical path my create a low or no tortuosity environment within the battery cell.

The present invention relates to a sodium secondary battery comprising: an anode container for accommodating sodium; a cathode container for accommodating a cathode active material and a cathode secondary electrolyte; a solid electrolyte positioned between the anode container and the cathode container and selectively moving sodium ions; and a polymer sealing layer formed along the edge of the solid electrolyte and positioned between the solid electrolyte and the anode container and between the solid electrolyte and the cathode container. Since the sodium secondary battery of the present invention uses the polymer sealing layer, an expensive bonding process and an expensive bonding facility are unnecessary, the number of parts of a single cell can be reduced, and a battery manufacturing process can be simplified.

A battery pack structure includes a chamber, a cooling duct arranged outside the pack case, and a connector that communicates the chamber and the cooling duct with each other. The connector includes a first opening, which is connected with the chamber in a state of being sealed by a first sealing member, a second opening, which is connected with a cooling duct in a state of being sealed by a second sealing member, a first sealing surface, which is formed in a peripheral part of the first opening and is either a tube-shaped surface or a plane that faces a chamber inlet surface though the first sealing member, and a second sealing surface, which is formed in a peripheral part of the second opening and is a tube-shaped surface or a plane that faces a duct outlet surface through the second sealing member.

A braze alloy composition for sealing a ceramic component to a metal component in an electrochemical cell is presented. The braze alloy composition includes copper, nickel, and an active metal element. The braze alloy includes nickel in an amount less than about 30 weight percent, and the active metal element in an amount less than about 10 weight percent. An electrochemical cell using the braze alloy for sealing a ceramic component to a metal component in the cell is also provided.

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.

A braze alloy composition for sealing a ceramic component to a metal component in an electrochemical cell is presented. The braze alloy composition includes copper, nickel, and an active metal element. The braze alloy includes nickel in an amount less than about 30 weight percent, and the active metal element in an amount less than about 10 weight percent. An electrochemical cell using the braze alloy for sealing a ceramic component to a metal component in the cell is also provided.