An object is to reduce the overall height and outside dimensions of a secondary battery. Another object is to prevent the secondary battery from being damaged by nut tightening torque. A secondary battery includes an electrode body (15), an outer can (11), a sealing plate (12), a pair of electrode terminals (13), and a short-circuit mechanism (20). The pair of electrode terminals (13) includes a first electrode terminal (13A) and a second electrode terminal (13B). The short-circuit mechanism (20) includes a conductive reversible plate (22) secured to the sealing plate (12), and a reversible plate receiver (25) disposed opposite the reversible plate (22). The reversible plate receiver (25) includes a first output terminal (31), and the first output terminal (31) is electrically insulated from the sealing plate (12). The first output terminal is electrically connected to the first electrode terminal, and is spaced from the first electrode terminal.

A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.

A method of manufacturing a secondary battery including an electrode body element fabricating step in which a first electrode body element including a positive electrode plate and a negative electrode plate, and a second electrode body element including a positive electrode plate and a negative electrode plate are fabricated, a tab-connecting step in which a first positive electrode tab group of the first electrode body element and a second positive electrode tab group of the second electrode body element are connected to a second positive electrode collector, and a first negative electrode tab group of the first electrode body element and a second negative electrode tab group of the second electrode body element are connected to a second negative electrode collector, and an electrode body fabricating step in which, after the tab-connecting step, the first electrode body element and the second electrode body element are unified.

A battery unit includes a housing assembly, an electrode assembly, a conductive plate, and a feedthrough assembly. The feedthrough assembly includes a first washer, a second washer, a conductive terminal, and a rivet. The housing assembly is provided with an opening for accommodating the feedthrough assembly. The first washer and the second washer are respectively disposed on an outer surface and an inner surface of the housing assembly. The conductive terminal is disposed on a side of the second washer facing away from the first washer. The rivet passes through the first washer, the opening, the second washer, and the conductive terminal, is electrically connected to the conductive terminal, and compresses the first washer and the second washer to seal the opening.

A battery unit includes a housing assembly, an electrode assembly, a conductive plate, and a feedthrough assembly. The feedthrough assembly includes a first washer, a second washer, a conductive terminal, and a rivet. The housing assembly is provided with an opening for accommodating the feedthrough assembly. The first washer and the second washer are respectively disposed on an outer surface and an inner surface of the housing assembly. The conductive terminal is disposed on a side of the second washer facing away from the first washer. The rivet passes through the first washer, the opening, the second washer, and the conductive terminal, is electrically connected to the conductive terminal, and compresses the first washer and the second washer to seal the opening.

A secondary battery includes: an electrode assembly; a case accommodating the electrode assembly, the case having an opening at a first end sized to accommodate the electrode assembly and a terminal hole at a second end opposite to the first end; a first current collector plate coupled to the electrode assembly; a terminal electrically coupled to the first current collector plate and extending through the terminal hole in the case; and a cap plate sealing the opening of the case.

A secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator; a can having a closed upper surface with a rivet opening therein and an open lower surface to accommodate the electrode assembly, the can being electrically connected to the first electrode plate; a rivet terminal in the rivet opening and electrically connected to the second electrode plate; a gasket between the can and the rivet terminal; and a cap plate sealing the lower surface of the can.

A secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator; a can having a closed upper surface with a rivet opening therein and an open lower surface to accommodate the electrode assembly, the can being electrically connected to the first electrode plate; a rivet terminal in the rivet opening and electrically connected to the second electrode plate; a gasket between the can and the rivet terminal; and a cap plate sealing the lower surface of the can.

Provided is a secondary battery. The secondary battery includes a can, an electrode assembly in the can, a collector plate electrically connected to the electrode assembly, and a terminal having a coupling part mechanically coupled to the collector plate by a pressure, electrically connected to the collector plate, and electrically connected to the electrode assembly.

Provided is a battery module that prevents a new current path that may be formed due to molten metal resulting from a molten and cut fuse, and has better safety than conventional battery modules. A battery module includes: module terminals; a battery cell group including a plurality of battery cells; and a plurality of bus bars connecting the plurality of battery cells of this battery cell group and connecting this battery cell group with the module terminals. At least one of the plurality of bus bars has a fuse. The battery module has a space that is located below the fuse and that allows the molten fuse to fall.