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.

A cylindrical secondary battery includes: an electrode assembly including a first electrode plate and a second electrode plate; a can having a bottom portion and a cylindrical side portion, accommodating the electrode assembly, and electrically connected to the first electrode plate; and a cap assembly. The cap assembly includes: a cap plate coupled to one end of the side portion of the can and electrically connected to the second electrode plate; a gasket insulating the cap plate and the side portion from each other; and a sub-plate covering at least a portion of the cap plate and at least a top portion of the side portion.

A cylindrical secondary battery includes: an electrode assembly including a first electrode plate and a second electrode plate; a can having a bottom portion and a cylindrical side portion, accommodating the electrode assembly, and electrically connected to the first electrode plate; and a cap assembly. The cap assembly includes: a cap plate coupled to one end of the side portion of the can and electrically connected to the second electrode plate; a gasket insulating the cap plate and the side portion from each other; and a sub-plate covering at least a portion of the cap plate and at least a top portion of the side portion.

A method of manufacturing a battery, in particular a button battery, including a case, provided with a container and a cap, and a polymer gasket, in particular made of polypropylene, compressed and bonded between the container and the cap. The method successively includes a step of implanting a silicatised layer by tribochemical sand blasting on all or part of the surface of the gasket, a step of adding a layer of adhesive to the surface of the gasket including the silicatised layer and/or on all or part of the surface of the container and of the surface of the cap intended to be joined to the gasket, a step of assembling the case with the gasket positioned by compression and bonding with the layer of adhesive between the container and the cap.

Provided is a cylindrical battery with which it is possible to suppress an increase in weight while increasing capacity. A cylindrical battery includes: an electrode body comprising a positive electrode and a negative electrode, which are wound together via a separator; an electrolyte; a bottomed cylindrical outer can for accommodating the electrode body and the electrolyte; and a sealing body that is fixed to an open end portion of the outer can by swaging and is for sealing the outer can. In regard to the outer can, the outer diameter of a body part for accommodating the electrode body is 20 mm or greater, and the outer diameter of the open end portion for accommodating the sealing body is less than the outer diameter of the body part.

Provided is a cylindrical battery with which it is possible to suppress an increase in weight while increasing capacity. A cylindrical battery includes: an electrode body comprising a positive electrode and a negative electrode, which are wound together via a separator; an electrolyte; a bottomed cylindrical outer can for accommodating the electrode body and the electrolyte; and a sealing body that is fixed to an open end portion of the outer can by swaging and is for sealing the outer can. In regard to the outer can, the outer diameter of a body part for accommodating the electrode body is 20 mm or greater, and the outer diameter of the open end portion for accommodating the sealing body is less than the outer diameter of the body part.

A power storage module includes a plurality of power storage devices (for example, secondary batteries) arranged side by side and a holder having a container that contains the plurality of power storage devices. The holder includes a first holder and a second holder. Each of the plurality of power storage devices includes a first end and a second end. The first end is contained in the first holder and the second end is contained in the second holder. In the holder, resin is disposed in at least one of a space between the plurality of power storage devices and a space between the power storage device and the holder. The holder is provided with a gap defined by at least the resin and the holder and communicating with the outside of the holder.

A power storage module includes a plurality of power storage devices (for example, secondary batteries) arranged side by side and a holder having a container that contains the plurality of power storage devices. The holder includes a first holder and a second holder. Each of the plurality of power storage devices includes a first end and a second end. The first end is contained in the first holder and the second end is contained in the second holder. In the holder, resin is disposed in at least one of a space between the plurality of power storage devices and a space between the power storage device and the holder. The holder is provided with a gap defined by at least the resin and the holder and communicating with the outside of the holder.

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.