This disclosure provides to a battery, an electric device, a manufacturing method and a manufacturing system for the battery. The battery includes a battery module, a casing, and a flow guide member. The battery module includes an explosion-proof assembly. The casing accommodates the battery module. The casing includes a gas discharge passage. The gas discharge passage includes a gas inlet and a gas outlet. The flow guide member is disposed inside the casing and shields the explosion-proof assembly to form a gas guide passage. The gas guide passage is in communication with the gas inlet, for guiding gas generated by the battery module to an exterior of the casing through the gas outlet after the explosion-proof assembly is destroyed. This disclosure intends to solve the technical problem of use safety of the battery being seriously affected due to the battery being prone to catching fire quickly and then exploding.

This disclosure provides to a battery, an electric device, a manufacturing method and a manufacturing system for the battery. The battery includes a battery module, a casing, and a flow guide member. The battery module includes an explosion-proof assembly. The casing accommodates the battery module. The casing includes a gas discharge passage. The gas discharge passage includes a gas inlet and a gas outlet. The flow guide member is disposed inside the casing and shields the explosion-proof assembly to form a gas guide passage. The gas guide passage is in communication with the gas inlet, for guiding gas generated by the battery module to an exterior of the casing through the gas outlet after the explosion-proof assembly is destroyed. This disclosure intends to solve the technical problem of use safety of the battery being seriously affected due to the battery being prone to catching fire quickly and then exploding.

A battery cell may comprise: an electrode assembly, a housing and an end cap. The electrode assembly may have a first tab. The housing may have an opening for accommodating the electrode assembly. The end cap may be configured to connect with the housing and cover the opening. The end cap may have an abutting surface and a welding groove, the abutting surface may be configured to abut against the first tab, and the welding groove may be recessed from one side of the end cap away from the electrode assembly towards the abutting surface. The end cap may form a connector between the abutting surface and the bottom surface of the welding groove, and the connector is configured for being welded with the first tab. The end cap is provided with a reinforcing structure, and the reinforcing structure is protruded from the bottom surface.

A lithium-sulfur battery includes a casing, a top lid circumferentially welded to the casing, a negative contact surface positioned opposite the top lid, a positive terminal disposed within the casing, welded to the top lid, and configured as a mandrel, a glass insulator circumferentially wound around the mandrel, and a jelly roll including at least an anode and a cathode wound around the mandrel. The jelly roll may also include a top surface not in contact with the top lid, a bottom surface partially in contact with the negative contact surface, and partially in contact with a plurality of non-hollow carbonaceous spherical particles disposed between the bottom surface of the jelly roll and the negative contact surface. At least some of the non-hollow carbonaceous spherical particles may provide one or more electrically-conductive pathways between the bottom surface and the negative contact surface.

A lithium-sulfur battery includes a casing, a top lid circumferentially welded to the casing, a negative contact surface positioned opposite the top lid, a positive terminal disposed within the casing, welded to the top lid, and configured as a mandrel, a glass insulator circumferentially wound around the mandrel, and a jelly roll including at least an anode and a cathode wound around the mandrel. The jelly roll may also include a top surface not in contact with the top lid, a bottom surface partially in contact with the negative contact surface, and partially in contact with a plurality of non-hollow carbonaceous spherical particles disposed between the bottom surface of the jelly roll and the negative contact surface. At least some of the non-hollow carbonaceous spherical particles may provide one or more electrically-conductive pathways between the bottom surface and the negative contact surface.

A battery header cap and an assembly method thereof are provided, and the battery header cap includes a battery, a battery header, an insulating sleeve, and a header cap. The battery includes a battery body and a battery case, and the battery case has a header groove near a case opening. The battery header is disposed at the case opening, and the insulating sleeve completely covers the metal surface of the battery header cap. The header cap includes an electrode plane and a sidewall, the electrode plane has a header cap opening to expose the metal electrode, the electrode plane is disposed on the insulating sleeve, the sidewall covers the end of the battery case, and the end of the sidewall is embedded into the header groove. The structure provides support and insulating protection for the header and also enhances the sealability of the case.

A battery header cap and an assembly method thereof are provided, and the battery header cap includes a battery, a battery header, an insulating sleeve, and a header cap. The battery includes a battery body and a battery case, and the battery case has a header groove near a case opening. The battery header is disposed at the case opening, and the insulating sleeve completely covers the metal surface of the battery header cap. The header cap includes an electrode plane and a sidewall, the electrode plane has a header cap opening to expose the metal electrode, the electrode plane is disposed on the insulating sleeve, the sidewall covers the end of the battery case, and the end of the sidewall is embedded into the header groove. The structure provides support and insulating protection for the header and also enhances the sealability of the case.

In a method for manufacturing an energy storage device by applying welding to a container of the energy storage device, the method includes: arranging a jig on which wall surfaces are formed between two parts to be welded to which welding is applied; and welding the two parts to be welded while supplying a shield gas to the two parts to be welded from two different directions corresponding to the two parts to be welded.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, a separator located between the first electrode and the second electrode, a first electrode tab extended from the first electrode, and a second electrode tab extended from the second electrode; a case connected to the first electrode tab to accommodate the electrode assembly, and including an opening portion to expose the electrode assembly; a cap plate coupled with the case to cover an outer peripheral region of the opening portion and including a through-hole to expose a center region of the opening portion; and a terminal plate connected to the second electrode tab to be insulation-bonded to the cap plate, and including a flange part covering the through-hole and a protruding part passing through the through-hole from a center portion of the flange part.

A secondary battery includes: an electrode assembly; a case accommodating the electrode assembly; a current collector plate welded to the electrode assembly and the case; and a cap plate on the current collector plate and sealing the case.