[Problem] To provide a battery cell case with a novel configuration in which the periphery of an opening in a surface which serves as an outer surface of a case lid having the opening is not resin laminated. [Solution] A battery cell case in which a case body and a case lid are joined by seaming or welding, wherein: the case body is made of a resin laminated steel sheet on a surface which serves as the inner surface of the case body; the resin laminate is made of a film of which a polyolefinic resin is the main ingredient; the case lid is made of a metal sheet; the case lid has an opening for releasing a gas generated by electrolyte injection or preliminary charging; and a range of at least 2 mm from the periphery of the opening in the surface which serves as the outer surface of the lid case is not resin laminated.

An alkaline electrochemical cell has a central cathode having a corresponding cathode current collector electrically connected with a positive terminal of the electrochemical cell. The cathode current collector has a tubular shape, such as a cylindrical shape or rectangular shape, extending parallel with the length of the central cathode. The cathode current collector is embedded within the central cathode, such as at a medial point of a radius of the central cathode, thereby minimizing the distance between the cathode current collector and any portion of the central cathode, thereby increasing the mechanical strength of the cathode and facilitating charge transfer to the cathode current collector.

A non-aqueous coin-shaped battery includes a battery case having a bottom plate portion and a side portion rising up from a periphery of the bottom plate portion, a sealing plate having a top plate portion and a peripheral portion extending from the top plate portion to an inside of the side portion, a gasket provided and compressed between the side portion and the peripheral portion, and a power generating element hermetically enclosed by the battery case and the sealing plate. The battery case contains magnetic stainless steel. The stainless steel has a chrome (Cr) content equal to or more than 17% by mass and equal to or less than 32% by mass, and has a grain size number more than 9 and equal to or less than 11.

A zinc-air battery cell assembly comprising: a cathode can that includes: a planar base, and an elongated cathode sidewall that extends to a terminal cathode sidewall end, and an anode can that includes: a planar top end, and an elongated anode sidewall that extends to a terminal anode sidewall end, the anode can disposed nested within the cathode can with the elongated anode sidewall disposed parallel and adjacent to the elongated cathode sidewall. The zinc-air battery assembly further includes a cavity defined by the cathode can and the anode can disposed nested within the cathode can, and a grommet that provides a seal between the cathode can and the anode can while also keeping the anode can and the cathode can separate.

A cylindrical battery according to one embodiment comprises: an electrode assembly obtained by wrapping a positive electrode and a negative electrode around a separator; an electrolyte; a bottomed cylindrical outer can that houses the electrode assembly and the electrolyte; a sealing body that plugs the opening of the outer can; and an annular gasket that is inserted between the outer can and the sealing body. The sealing body is anchored by being crimped to an open end of the outer can via the gasket. The gasket has a projection formed on the outer peripheral surface thereof, the projection protruding outside radially and the projection is in contact with the inner peripheral surface of the open end of the outer casing.

A cylindrical battery according to one embodiment comprises: an electrode assembly obtained by wrapping a positive electrode and a negative electrode around a separator; an electrolyte; a bottomed cylindrical outer can that houses the electrode assembly and the electrolyte; a sealing body that plugs the opening of the outer can; and an annular gasket that is inserted between the outer can and the sealing body. The sealing body is anchored by being crimped to an open end of the outer can via the gasket. The gasket has a projection formed on the outer peripheral surface thereof, the projection protruding outside radially and the projection is in contact with the inner peripheral surface of the open end of the outer casing.

A secondary battery is provided in which a first electrode (negative electrode) terminal and a second electrode (positive electrode) terminal may be concurrently (e.g., simultaneously) implemented in a cap assembly. A secondary battery includes: a case including a beading part and a crimping part; an electrode assembly physically coupled to the case and including a first electrode plate and a second electrode plate, the first electrode plate being electrically connected to the case; a first insulating gasket between the beading part and the crimping part; a cap plate coupled between the beading part and the crimping part through the first insulating gasket; a second insulating gasket extending through and coupled to the cap plate; and a rivet terminal extending through and physically coupled to the second insulating gasket, wherein the rivet terminal is electrically connected to the second electrode plate of the electrode assembly.

A secondary battery is provided in which a first electrode (negative electrode) terminal and a second electrode (positive electrode) terminal may be concurrently (e.g., simultaneously) implemented in a cap assembly. A secondary battery includes: a case including a beading part and a crimping part; an electrode assembly physically coupled to the case and including a first electrode plate and a second electrode plate, the first electrode plate being electrically connected to the case; a first insulating gasket between the beading part and the crimping part; a cap plate coupled between the beading part and the crimping part through the first insulating gasket; a second insulating gasket extending through and coupled to the cap plate; and a rivet terminal extending through and physically coupled to the second insulating gasket, wherein the rivet terminal is electrically connected to the second electrode plate of the electrode assembly.

Disclosed is a button battery or cylindrical battery, including: a first shell (1), the first shell (1) comprising a first annular sidewall (11) and a first end cover (12), wherein the first annular sidewall (11) is hermetically provided with the first end cover (12) at one end and is open at the other end; a second shell (2), the second shell (2) comprising a second annular sidewall (21) and a second end cover (22), wherein the second annular sidewall (21) is hermetically provided with the second end cover (22) at one end and is open at the other end; the first shell (1) and the second shell (2) are connected together with their open ends opposite to each other, the first annular sidewall (11) is sleeved outside the second annular sidewall (21), an insulating sleeve (3) is provided between the first annular sidewall (11) and the second annular sidewall (21), a first annular protrusion (23) protruding toward the insulating sleeve (3) is formed in the circumferential direction of the outer surface of the second annular sidewall (21), and the first annular protrusion (23) abuts against the insulating sleeve (3).

A cylindrical secondary battery includes: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can accommodating the electrode assembly and being electrically connected to the negative electrode plate, a lower end of the cylindrical can being open; a rivet terminal passing through an upper surface of the cylindrical can and electrically connected to the positive electrode plate; and a cap plate sealing the lower end of the cylindrical can, the cap plate having no electrical polarity.