In an embodiment, a battery includes a container, a lid member, an electrode group, an electrode terminal and an electrode group retainer. The lid member is attached to a peripheral wall of the container with an opening of an inner cavity being closed. The electrode terminal is electrically connected to the current collecting tab. The electrode group retainer is arranged between the electrode group and the lid member. A proximity plate portion of the electrode group retainer is close to the electrode group from a side where the lid member is located and forms a space between the lid member and thereof. A facing surface of the proximity plate portion is formed to have a shape that is along an outer surface of an end portion of the electrode group on a side where the lid member is located.

In an embodiment, a battery includes a container, a lid member, an electrode group, a current collecting tab, an electrode terminal, a lead and a spacer. The lid member is attached to a peripheral wall of the container with an opening of an inner cavity being closed. The current collecting tab protrudes in the electrode group toward a side where the lid member is located, and the lead electrically connects the current collecting tab and the electrode terminal. The spacer is integrally formed of an electrically insulating material. The spacer includes a top plate portion sandwiched between the lead and the lid member, and a peripheral plate portion extending from the top plate portion toward a side where the electrode group is located and covering the lead and the current collecting tab in the inner cavity from an outer peripheral side.

Battery packs are presented having structural members for improving thermal management of battery cells therein. In some embodiments, the battery packs include a first end-member positioned opposite a second end-member and parallel thereto. The battery packs also include a first side beam positioned opposite a second side beam and parallel thereto. The first side beam and the second side beam extend longitudinally between the first end-member and the second end-member. A longitudinal member is disposed between the first side beam and the second side beam and defines a plurality of longitudinal rows. The battery packs may additionally include a lateral member disposed between first end-member and the second end-member to partition the plurality of longitudinal rows into an array of battery cell compartments. A battery cell is disposed within at least one battery cell compartment.

A sealed battery, which is an exemplary embodiment, comprises a battery case including a bottomed cylindrical outer can and a sealing body that closes an opening of the outer can, a gasket disposed between the outer can and the sealing body, and an electrode body including an electrode and housed in the battery case. The sealing body includes a metal plate, and the metal plate has a thin portion formed in an annular shape, a valve portion having a convex shape inside the battery case, and an annular portion to which the electrode lead is connected. The gasket is provided with an elastically deformable portion that abuts against the inner surface of the valve portion and urges the valve portion to the outside of the battery case.

A sealed battery, which is an exemplary embodiment, comprises a battery case including a bottomed cylindrical outer can and a sealing body that closes an opening of the outer can, a gasket disposed between the outer can and the sealing body, and an electrode body including an electrode and housed in the battery case. The sealing body includes a metal plate, and the metal plate has a thin portion formed in an annular shape, a valve portion having a convex shape inside the battery case, and an annular portion to which the electrode lead is connected. The gasket is provided with an elastically deformable portion that abuts against the inner surface of the valve portion and urges the valve portion to the outside of the battery case.

Provided is a rectangular secondary battery with improved rigidity against vibrations and impacts. A rectangular secondary battery of the present invention includes: a flat-shaped electrode group; a current-collecting plate electrically connected to the electrode group; a battery case accommodating the current-collecting plate and the electrode group; a battery cover that closes an opening of the battery case; an electrode terminal penetrating through the battery cover, the electrode terminal being connected to the current-collecting plate via a connecting member; and a gasket that is inserted between the electrode terminal and the battery cover for insulating and sealing. An insulator is disposed between the current-collecting plate and the battery cover, the battery cover includes a battery cover side fixing part that fixes the insulator, and the insulator includes a current-collecting plate side fixing part that fixes the current-collecting plate.

Provided is a rectangular secondary battery with improved rigidity against vibrations and impacts. A rectangular secondary battery of the present invention includes: a flat-shaped electrode group; a current-collecting plate electrically connected to the electrode group; a battery case accommodating the current-collecting plate and the electrode group; a battery cover that closes an opening of the battery case; an electrode terminal penetrating through the battery cover, the electrode terminal being connected to the current-collecting plate via a connecting member; and a gasket that is inserted between the electrode terminal and the battery cover for insulating and sealing. An insulator is disposed between the current-collecting plate and the battery cover, the battery cover includes a battery cover side fixing part that fixes the insulator, and the insulator includes a current-collecting plate side fixing part that fixes the current-collecting plate.

A battery system includes a can with a lip around an opening. At least an interior surface of the can is anodized and the lip of the can includes a longer and shorter side. The can further includes a flange on the longer side of the lip and a plurality of layers that are inserted into the can. The plurality of layers includes a battery cell and a thermally conducting layer with a fin and the fin has a spring force that pushes the fin towards the anodized interior surface. The battery system further includes a lid that is configured to cover the opening of the can, where the flange is configured to wrap around the lid when the lid covers the opening of the can.

A battery system includes a can with a lip around an opening. At least an interior surface of the can is anodized and the lip of the can includes a longer and shorter side. The can further includes a flange on the longer side of the lip and a plurality of layers that are inserted into the can. The plurality of layers includes a battery cell and a thermally conducting layer with a fin and the fin has a spring force that pushes the fin towards the anodized interior surface. The battery system further includes a lid that is configured to cover the opening of the can, where the flange is configured to wrap around the lid when the lid covers the opening of the can.

The present application provides a secondary battery, which includes a first electrode assembly, a second electrode assembly, a case, and a top cap assembly. The top cap assembly includes a top cap plate and a first electrode terminal, the top cap plate is connected to the case, and the first electrode terminal is arranged on the top cap plate. The first electrode assembly includes a first body and first tabs extending from the first body, and the first tabs are multiple and stacked. The second electrode assembly includes a second body and second tabs extending from the second body, and the second tabs are multiple and stacked. An end of each of the second tabs that is away from the second body is a second end portion. Each of the first tabs includes a first connecting portion extending beyond the second end portion.