Energy storage systems, battery cells, and batteries of the present technology may include a heat exchanger or fluid delivery structure that may transfer heat from a battery cell or cell block to a heat exchange fluid. The heat exchanger or fluid delivery structure may substantially maintain an interfacial temperature during a temperature increase from the battery cell or cell block.

Energy storage systems, battery cells, and batteries of the present technology may include a heat exchanger or fluid delivery structure that may transfer heat from a battery cell or cell block to a heat exchange fluid. The heat exchanger or fluid delivery structure may substantially maintain an interfacial temperature during a temperature increase from the battery cell or cell block.

A battery cell having an electrode assembly having a hollow structure with a hexagonal prism-shaped hole at a center, of which an exterior of the electrode assembly is in a shape of a hexagonal prism, and a cell case in which the electrode assembly is received, of which an exterior of the cell case is in a shape of a hexagonal prism is provided.

A battery cell having an electrode assembly having a hollow structure with a hexagonal prism-shaped hole at a center, of which an exterior of the electrode assembly is in a shape of a hexagonal prism, and a cell case in which the electrode assembly is received, of which an exterior of the cell case is in a shape of a hexagonal prism is provided.

The present disclosure relates to a can for a secondary battery and a secondary battery. The can for the secondary battery can include a can body, in which an electrode assembly accommodation part accommodating an electrode assembly are formed. The can body can be opened to one side. The secondary battery can include a cover to cover one end of the can body to seal an opening and in which a through-hole through which an electrode lead of the electrode assembly passes. The can body can include a body heat pipe that transfers heat so that the heat is dissipated through the can body when the heat generated in the electrode lead is transferred from the cover to the can body.

The present disclosure relates to a can for a secondary battery and a secondary battery. The can for the secondary battery can include a can body, in which an electrode assembly accommodation part accommodating an electrode assembly are formed. The can body can be opened to one side. The secondary battery can include a cover to cover one end of the can body to seal an opening and in which a through-hole through which an electrode lead of the electrode assembly passes. The can body can include a body heat pipe that transfers heat so that the heat is dissipated through the can body when the heat generated in the electrode lead is transferred from the cover to the can body.

This application provides a battery, an apparatus, a preparation method of battery, and a preparation apparatus of battery. The battery includes a first battery cell, a second battery cell, and a first thermal insulation member. The second battery cell is disposed adjacent to the first battery cell, an energy density of the second battery cell is less than that of the first battery cell, and the first thermal insulation member is disposed between the first battery cell and the second battery cell.

An energy storage device comprising: a container, a mandrel, at least one sheet of separator material, and two or more electrodes. The container comprises an internal space bounded by an internal wall. The mandrel is positioned in the internal space and forms a cavity between a mandrel surface and the internal wall of the container. The sheet of separator material is arranged within the cavity about the mandrel to provide a plurality of discrete separator layers. An electrode is provided between each of the discrete separator layers, the mandrel is compressible, and the shape of the mandrel surface is concentric with the internal wall of the container.

An energy storage device comprising: a container, a mandrel, at least one sheet of separator material, and two or more electrodes. The container comprises a base and an inner surface forming an internal space. The mandrel is positioned in the container and is spaced apart from the inner surface to define a cavity within the container. The sheet of separator material is arranged about the mandrel to provide a plurality of discrete separator layers within the cavity. At least one electrode is provided between each of the discrete separator layers, and at least a portion of an external surface of a container has a curved profile.

An energy storage device comprising: a container, a mandrel, at least one sheet of separator material, and two or more electrodes. The container comprises an internal space defined by at least one internal wall and a base. The mandrel comprises a longitudinal axis, and is positioned in the container such that the longitudinal axis passes through the internal space and the base. The sheet of separator material is arranged about the mandrel to provide a plurality of discrete separator layers which are spaced apart in a packing direction normal to the longitudinal axis. At least one electrode is provided between each of the discrete separator layers, and the mandrel has at least one hollow column running along the length of its longitudinal axis such that a part of the base is accessible via the hollow column.