An electrical storage module includes: an electrical storage device; a case in which an electrical storage device is housed; and a lid configured to cover an opening part of the case. The case includes a groove part at an outer periphery of the opening part, and the lid includes a rib configured to be inserted into the groove part. A sealing member is present between the rib and the groove part. The sealing member, in a state of having viscosity, is accommodated in the groove part, and then is cured, and the viscosity becomes low. The sealing member is an adhesive.

A cylindrical secondary battery including a can including a circular bottom part and a cylindrical side part having an opened one end, an electrode assembly in which a first electrode plate, a second electrode plate, and a separator are wound and which is accommodated in the can, and a collecting plate arranged in a direction toward the first electrode plate. The first electrode plate and the collecting plate, and the second electrode plate and the bottom part are electrically connected to each other in a non-welding manner. According to the embodiment, since the electrode assembly and the collecting plate and also the electrode assembly and the can are electrically connected to each other without the welding, the electrode assembly may be prevented or reduced from being damaged by foreign substances generated during the welding, thereby improving stability of the secondary battery.

A secondary battery according to an embodiment includes an exterior material including an opening portion and including a bottom, a wound electrode group housed in the exterior material in order for an insertion direction to be perpendicular to a winding axis, and a lid attached to the opening portion of the exterior material and including at least a plate-like member, a positive electrode terminal, and a negative electrode terminal. When a minimum distance between the lid and the wound electrode group is A.sub.MIN, 0.5 mm<A.sub.MIN<2.0 mm is satisfied.

A housing for a button cell battery includes a top, a can and a grommet. The skirt of the can extends between a top panel and a free end, and includes a substantially vertical first section and an outwardly tapered second section. The first section extends from the top panel of the can. The second section extends from the first section. Upon assembly of the housing, a flow path is defined between an outer surface of the skirt of the grommet and the inner surface of the skirt of the can. The flow path allows air to escape during the assembly, thus minimizing the risk of gas being entrapped within the interior of the housing of the finished cell battery.

Provided is a technique increasing the capacity of secondary batteries. According to the technique disclosed herein, there is provided a secondary battery having a flat wound electrode body in which a first electrode and a second electrode different from the first electrode are laminated and wound with a separator interposed therebetween, and a first current collecting member. The wound electrode body has a plurality of first electrode tabs. Ten or more first electrode tabs are provided and stacked. In a thickness direction of the wound electrode body, a ratio (N.sub.1A/N.sub.1B) of the number N.sub.1A of stacked layers of the first electrode tabs and the number N.sub.1B of stacked layers of the first electrode satisfies 0.3 to 0.7. The plurality of first electrode tabs are bent and connected to the first electrode current collecting member.

Provided is a technique increasing the capacity of secondary batteries. According to the technique disclosed herein, there is provided a secondary battery having a flat wound electrode body in which a first electrode and a second electrode different from the first electrode are laminated and wound with a separator interposed therebetween, and a first current collecting member. The wound electrode body has a plurality of first electrode tabs. Ten or more first electrode tabs are provided and stacked. In a thickness direction of the wound electrode body, a ratio (N.sub.1A/N.sub.1B) of the number N.sub.1A of stacked layers of the first electrode tabs and the number N.sub.1B of stacked layers of the first electrode satisfies 0.3 to 0.7. The plurality of first electrode tabs are bent and connected to the first electrode current collecting member.

The present disclosure provides a battery and an electronic device, which relate to the technical field of batteries and are used for solving the technical problem of poor sealing performance of batteries. The battery includes a shell, a cover assembly and a coiled core assembly located inside the shell; the shell is provided with an opening, and the cover assembly sealingly covers the opening; the cover assembly includes a conductive member, a top cover and a sealing member between the conductive member and the top cover; the conductive member electrically contacts the coiled core assembly; the sealing member is provided with a first through hole, the top cover is provided with a second through hole, and a diameter of the first through hole is smaller than that of the second through hole.

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 cylindrical battery including an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween; an upper insulating plate disposed on the electrode body; a positive electrode current collector plate disposed on the upper insulating plate; a sealing body; and an outer can. A first positive electrode lead extends between the upper insulating plate and the current collector plate after passing through a through-hole of the upper insulating plate and is bent onto the current collector plate at an outer circumference portion thereof, and a second positive electrode lead extends along the outside of an outer circumference portion of the upper insulating plate and is bent onto the current collector plate at the outer circumference portion thereof. Those positive electrode leads are all connected to the current collector plate.

The battery is sealed by a sealing member including a safety valve for exhausting the gas generated in the battery to the outside of the battery when the pressure in the battery is increased. A part of the sealing member is formed of a member having a melting point lower than that of high-temperature gas generated in the abnormal time and having a ratio of an area of an opening of the battery case to an area of a gas exhaust hole is 3.0×10.sup.−5 or more and 9.1×10.sup.−3 or less.