A hybrid energy storage device has at least two half cells, wherein each half cell includes an electrode comprising an electrically conductive high surface area material incorporating an electrolyte comprising a dissolved species that can exist in more than two redox states, and at least one separator that separates the at least two half cells and allows transfer of selected charge carriers between the half cells. After an initial charging, a redox pair of one half cell is different from the redox pair of the other half cell. The hybrid energy storage device operates as a battery for low power applications, and as a supercapacitor for high power applications. The hybrid energy storage device may be flexible.

Provided is an electricity-storage module including: a stacked body that includes electrodes which are stacked along a first direction; a sealing body that is provided to the stacked body so as to surround a peripheral edge portion of the electrodes, forms an inner space that stores an electrolytic solution between the electrodes adjacent to each other along the first direction, and seals the inner space; and a reinforcing body that is provided in the electrodes so as to suppress deformation of the electrodes. The electrodes include bipolar electrodes and a negative terminal electrode, the negative terminal electrode includes the electrode plate and a negative electrode provided on the second surface, and is disposed at one end of the stacked body in the first direction such that the second surface faces an inner side of the stacked body in the first direction.

A bipolar battery having a solid ionically conductive polymer material as its electrolyte enabling high voltage discharge.

A connection assembly includes a substrate formed of a non-conductive material, a first current collector disposed on a first side of the substrate, and a second current collector disposed on a second side of the substrate. The substrate has a via extending through the substrate from the first side of the substrate to the second side of the substrate opposite the first side. A connection element is disposed in the via between the first current collector and the second current collector. The connection element mechanically and electrically connects the first current collector and the second current collector through the via.

A power storage device includes a power storage module, a conductive plate, and a sealing member. The power storage module includes an electrode laminate and a sealing body. The sealing body includes a plurality of resin portions. Metal plates at laminate ends of the electrode laminate each have an exposed surface exposed from the resin portion. The exposed surface includes a contact region and a non-contact region. The sealing member includes a first sealing portion. The first sealing portion is provided along an inner edge of the resin portion to be in contact with the resin portion. The first sealing portion adheres to the conductive plate and the non-contact region and fills a portion between the conductive plate and the non-contact region. The first sealing portion seals a portion between the conductive plate and the exposed surface.

A hybrid energy storage device has at least two half cells, wherein each half cell includes an electrode comprising an electrically conductive high surface area material incorporating an electrolyte comprising a dissolved species that can exist in more than two redox states, and at least one separator that separates the at least two half cells and allows transfer of selected charge carriers between the half cells. After an initial charging, a redox pair of one half cell is different from the redox pair of the other half cell. The hybrid energy storage device operates as a battery for low power applications, and as a supercapacitor for high power applications. The hybrid energy storage device may be flexible.

A secondary battery in which an electrode assembly including positive electrodes, negative electrodes, and separators disposed between the positive electrodes and the negative electrodes, and an electrolyte are housed in an exterior body. The electrode assembly has a step structure including a first region having a relatively high cross-sectional height and a second region having a relatively low cross-sectional height adjacent to the first region. The electrode assembly includes at least one of a positive electrode side connecting portion and a negative electrode side connecting portion in the first region. At least one of a positive electrode side extended portion and a negative electrode side extended portion in the second region is configured to be electrically connected to an external terminal.

A chambered frame insert (2) for an electrolyte chamber of a battery (200) includes a plurality of ribs (4) laterally and defining a plurality of chambers (6), and a plurality of voids (8) each formed in a corresponding rib and configured to allow gas to travel between the plurality of chambers. The plurality of ribs are angled with respect to a horizontal lateral axis (H) of the frame insert.

A power storage module 12 according to a first aspect includes: a laminated body 30 in which bipolar electrodes 32 including an electrode plate 34, a positive electrode 36, and a negative electrode 38, are laminated; a frame body 50 provided with an opening 50a communicated with a plurality of internal spaces V; and a pressure adjustment valve 60 connected to the opening 50a. The pressure adjustment valve 60 includes a base member 70 connected to the opening 50a and provided with a plurality of communication holes 74 respectively communicated with the plurality of internal spaces V, a valve body 80 arranged to shut opening ends 76a of the plurality of communication holes 74, and a cover member 90 pressing the valve body 80 against the base member 70.

A method for forming a battery assembly including: a) stacking a plurality of battery plates to form a plurality of electrochemical cells, and b) welding about an exterior periphery of the plurality of battery plates to form one or more integrated edge seals such that one or more individual battery plates are bonded to one or more adjacent battery plates. The one or more individual battery plates may include one or more projections extending from the exterior periphery of the individual battery plate toward the adjacent one or more battery plates; and wherein upon stacking, the one or more projections of the one or more individual battery plates overlap about an exterior of the one or more adjacent battery plates. The integrated edge seal may be formed by one or more projections bonding to the one or more adjacent battery plates.