An electrode body having an electrode, and a primer layer or a plurality of primer layers laminated on the electrode, wherein the at least one primer layer is an in-situ polymerizable composition layer formed from a polymerization product of an in-situ polymerizable composition, a method for producing an electrode body, and an electrochemical element.

An electrochemical device includes an electrode assembly, a housing, a sealing member, and a tab. The housing includes a main body portion and a sealing portion. At least a portion of the sealing member is disposed in the sealing portion, and the sealing member includes a first sealing member and a second sealing member. The tab protrudes from the sealing portion and is arranged between the first sealing member and the second sealing member. The first sealing member includes a first sealing layer and a second sealing layer disposed on the first sealing layer, and the first sealing layer is located between the tab and the second sealing layer. A melting point of the first sealing layer is lower than that of the second sealing layer, and a difference in the melting point between the first sealing layer and the second sealing layer is 35° C. to 50° C.

An electricity storage module includes: an electricity storage device; a case that houses the electricity storage device and includes a bottom surface part and the opening part located at a side opposite to the bottom surface part; a lid that covers an opening part; and a sealing member that seals between the case and the lid. The case has a first case surface that surrounds the opening part along an outer periphery of the opening part. The lid has a first lid surface facing the first case surface. The sealing member is disposed between the first case surface and the first lid surface.

Disclosed herein is a method for using a high temperature rechargeable energy storage device comprising (a) obtaining an HTRESD; and (b) at least one of (1) cycling the HTRESD by alternatively charging and discharging the HTRESD at least twice over a duration of 20 hours and (2) maintaining a voltage across the HTRESD for 20 hours, such that the HTRESD exhibits a peak power density between 0.005 W/liter and 75 kW/liter after 20 hours when operated at an ambient temperature in an operating temperature range comprising between about −40° C. and about 210° C.

Disclosed herein is a method for using a high temperature rechargeable energy storage device comprising (a) obtaining an HTRESD; and (b) at least one of (1) cycling the HTRESD by alternatively charging and discharging the HTRESD at least twice over a duration of 20 hours and (2) maintaining a voltage across the HTRESD for 20 hours, such that the HTRESD exhibits a peak power density between 0.005 W/liter and 75 kW/liter after 20 hours when operated at an ambient temperature in an operating temperature range comprising between about −40° C. and about 210° C.

A rechargeable battery is provided with a pressure release valve and a current interruption mechanism. The current interruption mechanism includes a deformation plate. When the internal pressure of the case reaches an interruption activation pressure, the deformation plate receives the internal pressure and is deformed to break a conducting portion. In the current interruption mechanism, a pressure that is set for maintaining the sealing at the contact portion between the deformation plate and a negative electrode conductor is defined as a sealing portion withstanding pressure, and the pressure that is set for maintaining the shape of the case is defined as a case withstanding pressure. The pressure for activating the pressure release valve is defined as a valve activation pressure. In this case, the sealing portion withstanding pressure and the valve activation pressure are set higher than the interruption activation pressure and lower than the case withstanding pressure.

An external terminal for an electric energy storage device, which is coupled to an upper end of a cylindrical metal case to cap the metal case and has a hollow formed at a center thereof so that a safety valve is installed therein, wherein the metal case includes an outer part exposed to the outside in an erect state in a normal direction and an inner part positioned below the outer part, and wherein the inner part includes a first surface adjacent to the hollow and a second surface stepped higher than the first surface (112a) toward the outer part (111).

An electrical feed-through includes: a feed-through component having an opening; at least one conductor sealed into the opening of the feed-through component in a glass material or a glass ceramic material; and at least one guide component connected to the feed-through component, the at least one guide component including a material that is a plastic.

A sealing film forms a seal between a first metal base body and a second base body. The sealing film includes a first adhesive layer, a second adhesive layer, and a base material layer. The first adhesive layer mainly contains an acid-modified polyolefin and adheres to the first base body. The second adhesive layer mainly contains a polyolefin and adheres to the second base body. The base material layer is provided between the first adhesive layer and the second adhesive layer. The thickness of the first adhesive layer is at least 25 and at most 70 when the total thickness of the sealing film is defined as 100. The thickness of the base material layer is at least 25 and at most 70. The thickness of the second adhesive layer is at least 5 and at most 50.

A package electric double-layer capacitor having a first terminal that extends from a package at a first corner of a first cell, which is adjacent to a second cell, on one side in a second direction orthogonal to a first direction. A second terminal extends from the package at the first corner in the first direction and on a side of the first terminal opposite to the second cell. A third terminal extends from the package at a second corner of the second cell, which is adjacent to the first cell and the first corner. A fourth terminal extends from the package at the second corner in the first direction and on a side of the third terminal opposite to the first cell.