A battery housing for an aerospace battery may include a first endplate; a flange; and an elliptical cylinder extending from a first cylinder end to a second cylinder end. The first cylinder end of the elliptical cylinder may be welded to the first endplate, and the second cylinder end of the elliptical cylinder may be welded to the flange. The elliptical cylinder is formed from a sheet of material comprising a first sheet end and a second sheet end. The first sheet end may be welded to the second sheet end at a weld location that runs from the first cylinder end to the second cylinder end at a perimeter location that is calculated to experience a reduced stress during pressurization of the housing.

A pressurizing mask for supporting a combination of a top cap assembly and an electrode assembly has a welding portion and an indent portion into which an electrode tab is inserted.

A pressurizing mask for supporting a combination of a top cap assembly and an electrode assembly has a welding portion and an indent portion into which an electrode tab is inserted.

A battery cell includes an electrode assembly. A shape of a radial cross section of the electrode assembly is an ellipse. A length of a major axis noted as L1 and a length of a minor axis noted as L2 of the electrode assembly satisfy a relational expression: 0.3 mm≤L1−L2≤0.5 mm.

A battery cell includes an electrode assembly. A shape of a radial cross section of the electrode assembly is an ellipse. A length of a major axis noted as L1 and a length of a minor axis noted as L2 of the electrode assembly satisfy a relational expression: 0.3 mm≤L1−L2≤0.5 mm.

A cylindrical secondary battery including a can including a circular bottom part and a cylindrical side part having an opened one end, an electrode assembly in which a first electrode plate, a second electrode plate, and a separator are wound and which is accommodated in the can, and a collecting plate arranged in a direction toward the first electrode plate. The first electrode plate and the collecting plate, and the second electrode plate and the bottom part are electrically connected to each other in a non-welding manner. According to the embodiment, since the electrode assembly and the collecting plate and also the electrode assembly and the can are electrically connected to each other without the welding, the electrode assembly may be prevented or reduced from being damaged by foreign substances generated during the welding, thereby improving stability of the secondary battery.

A cylindrical secondary battery including a can including a circular bottom part and a cylindrical side part having an opened one end, an electrode assembly in which a first electrode plate, a second electrode plate, and a separator are wound and which is accommodated in the can, and a collecting plate arranged in a direction toward the first electrode plate. The first electrode plate and the collecting plate, and the second electrode plate and the bottom part are electrically connected to each other in a non-welding manner. According to the embodiment, since the electrode assembly and the collecting plate and also the electrode assembly and the can are electrically connected to each other without the welding, the electrode assembly may be prevented or reduced from being damaged by foreign substances generated during the welding, thereby improving stability of the secondary battery.

A battery cell may include: a housing having an opening; an electrode assembly, accommodated in the housing, where a first tab is disposed on the electrode assembly at an end oriented toward the opening; and an end cap, configured to fit and cover the opening. The end cap may include a cap body and a first protruding structure connected to the cap body. A rupturable structure may be disposed on the cap body. The end cap may rupture along the rupturable structure when an internal pressure of the battery cell reaches a threshold, so as to release the internal pressure. The first protruding structure may protrude from the cap body toward the electrode assembly, and support the first tab so that an avoidance clearance configured to avoid the rupturable structure is formed between the first tab and the cap body.

A battery cell, a battery, an electric device, and a manufacturing device and method of battery cell are described. The battery cell includes a metal housing, an electrode assembly, and a conductive member, where the metal housing has an accommodating cavity; the electrode assembly is accommodated in the accommodating cavity, the electrode assembly includes a first tab, and the first tab is electrically connected to the metal housing; and the conductive member is disposed on an outer surface of the metal housing, and resistance of the conductive member is lower than that of the metal housing. In the charging and discharging process, current passes through the conductive member or passes through both the conductive member and the metal housing, in whichever cases, the resistance in the charging and discharging process of the battery cell is lower than that in the case of current passing through the metal housing only.

A heat rejection panel comprising a first and a second plate. The first plate comprises an oscillating heat pipe face having a plurality of first opened elongated recesses formed therein, and the second plate comprises an oscillating heat pipe face having a plurality of second open elongated recesses formed therein. The first plate oscillating heat pipe face is hermetically sealed to the second plate oscillating heat pipe face forming a bond joint therebetween. The first plate caps the second open elongated recesses and the second plate caps the first open elongated recesses such that first open elongated recesses are physically and fluidly connected to the second open elongated recesses, thereby forming at least one non-planar oscillating heat pipe channel within the panel that reciprocates back and forth across the bond joint having the bond joint as a longitudinal axis.