Provided are a box, a battery, an electrical device, and a method for manufacturing the battery, which belong to the technical field of energy storage devices. The box is applicable to a battery, the battery includes a battery cell, in which the box includes a plurality of box walls, in which the plurality of box walls enclose a first chamber for accommodating the battery cell, and at least one of the box walls is internally provided with a second chamber for accommodating fire-fighting agent, in which the first chamber and the second chamber are configured to be able to communicate with each other when the battery cell is thermal-runaway, so that the fire-fighting agent releases fire-fighting medium into the first chamber. The box, the battery, the electrical device and the method for manufacturing the battery can improve the safety performance of the battery.

A bus bar including a first end comprising a first material and a second end comprising a second material and a method of manufacture are provided. The first end is designed to be coupled to a terminal of a first battery cell of a battery module and includes a first collar disposed on the first end designed to receive and surround the terminal of the first battery cell of the battery module. The second end is designed to be coupled to a terminal of a second battery cell of the battery module and includes a second collar disposed on the second end designed to receive and surround the terminal of the second battery of the battery module. The first and second batteries of the battery module are adjacent to one another. Moreover, the bus bar includes a joint electrically and mechanically coupling the first end and the second end.

A bus bar including a first end comprising a first material and a second end comprising a second material and a method of manufacture are provided. The first end is designed to be coupled to a terminal of a first battery cell of a battery module and includes a first collar disposed on the first end designed to receive and surround the terminal of the first battery cell of the battery module. The second end is designed to be coupled to a terminal of a second battery cell of the battery module and includes a second collar disposed on the second end designed to receive and surround the terminal of the second battery of the battery module. The first and second batteries of the battery module are adjacent to one another. Moreover, the bus bar includes a joint electrically and mechanically coupling the first end and the second end.

A method for manufacturing a cylindrical battery having multiple tabs is provided in which the cylindrical battery includes an electrode assembly, a cylindrical pouch case, an electrode tab protruding to an upper end of the electrode assembly, and an electrode lead welded and electrically connected to the electrode tab, with the electrode tab being plural. The method includes disposing the plurality of electrode tabs on the electrode assembly; winding the electrode assembly into a cylindrical shape; connecting the electrode lead to the plurality of electrode tabs disposed on the upper end of the electrode assembly; inserting the electrode assembly into the cylindrical pouch case to produce a battery cell; connecting, to the cylindrical pouch case, a gas collecting part for collecting gas generated due to charging and discharging of the electrode; and forming a guide part for preventing deformation of the battery cell in the cylindrical pouch case.

A bus bar including a first end comprising a first material and a second end comprising a second material and a method of manufacture are provided. The first end is designed to be coupled to a terminal of a first battery cell of a battery module and includes a first collar disposed on the first end designed to receive and surround the terminal of the first battery cell of the battery module. The second end is designed to be coupled to a terminal of a second battery cell of the battery module and includes a second collar disposed on the second end designed to receive and surround the terminal of the second battery of the battery module. The first and second batteries of the battery module are adjacent to one another. Moreover, the bus bar includes a joint electrically and mechanically coupling the first end and the second end.

A bus bar including a first end comprising a first material and a second end comprising a second material and a method of manufacture are provided. The first end is designed to be coupled to a terminal of a first battery cell of a battery module and includes a first collar disposed on the first end designed to receive and surround the terminal of the first battery cell of the battery module. The second end is designed to be coupled to a terminal of a second battery cell of the battery module and includes a second collar disposed on the second end designed to receive and surround the terminal of the second battery of the battery module. The first and second batteries of the battery module are adjacent to one another. Moreover, the bus bar includes a joint electrically and mechanically coupling the first end and the second end.

A battery vent cap gang includes a plurality of vent caps. A primary member is operably coupled to each of the plurality of vent caps. A first translation member is operably coupled to a first one of the plurality of vent caps and spaced from the primary member in a first direction. A second translation member is operably coupled to a second one of the plurality of the vent caps and spaced from the primary member in a second direction. An actuator is operably coupled to the primary member, the first translation member, and the second translation member to cause substantially simultaneous rotational movement of the plurality of vent caps.

A battery vent cap gang includes a plurality of vent caps. A primary member is operably coupled to each of the plurality of vent caps. A first translation member is operably coupled to a first one of the plurality of vent caps and spaced from the primary member in a first direction. A second translation member is operably coupled to a second one of the plurality of the vent caps and spaced from the primary member in a second direction. An actuator is operably coupled to the primary member, the first translation member, and the second translation member to cause substantially simultaneous rotational movement of the plurality of vent caps.

A battery cell closure strip for a battery cell of prismatic or of pouch-type design is disclosed. A main body has a degassing duct which extends along the vertical axis of the battery cell closure strip from an inner side of the battery cell closure strip to the outer side of the battery cell closure strip. The degassing duct is closed by means of a media-operated sealing element during regular operation of the battery cell closure strip. The sealing element opens the degassing duct when a predefined limit pressure of the battery cell is reached. An emergency degassing duct has an opening cross section through which media can flow that is at least 10 times larger than that of the degassing duct and which is closed by a bursting valve which opens the emergency degassing duct when a bursting pressure is reached or exceeded.

A technical problem to be solved according to an embodiment of the present invention is to provide a cylindrical secondary battery which can prevent components thereof from being deformed during manufacturing processes or in use. To this end, an embodiment of the present invention provides a cylindrical secondary battery comprising: a cylindrical can; an electrode assembly received in the cylindrical can; and a cap assembly covering the cylindrical can to seal the electrode assembly, wherein the cap assembly comprises a cap-up, a cap-down below the cap-up, and a safety vent between the cap-up and the cap-down, and the contact ratio between the safety vent and the cap-down ranges from 60% to 100%.