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.

The present invention provide a non-aqueous electrolyte for use in static or non-flowing rechargeable electrochemical cells or batteries, wherein the electrolyte comprises a first deep eutectic solvent comprises a zinc salt, a second deep eutectic solvent comprising one or more quaternary ammonium salts, and a hydrogen bond donor. Another aspect of the present invention also provides a non-flowing rechargeable electrochemical cell that employs the non-aqueous electrolyte of the present invention.

The present invention relates to a stack-folding type of electrode assembly and a lithium metal battery including the same. In detail, according to an exemplary embodiment of the present invention, the lithium metal battery is realized as a stack-folding type, and the insulation tape is respectively attached to the upper side and the lower side of the folding separation film, thereby solving the drawback of exposure of the lithium dendrite and the dead lithium produced on the surface of the negative electrode during the charging and discharging process.

Provided is a terminal assembly for an electrochemical battery comprising a terminal connector; a conductive flat-plate with an electrically conducting perimeter; an electrically insulating tape member; and a terminal bipolar electrode plate. The electrically insulating tape member is in between the conductive flat-plate and the terminal bipolar electrode plate such that the electrically insulating tape member does not cover the entire surface area of the conductive flat-plate. The electrically conducting perimeter enables bi-directional uniform current flow through the conductive flat-plate between the terminal connector and the terminal bipolar electrode plate. Also provided is a battery frame member for a static rechargeable battery comprising a liquid diversion system; a gutter; a sealing member; a gas channel; and a ventilation hole. Also provided is a static rechargeable electrochemical battery comprising a pair of terminal assemblies, at least one bipolar electrode interposed between the pair of terminal assemblies, and a battery frame member.

A bipolar battery includes N battery cores each comprising a cathode electrode, an anode electrode, and a separator, where N is an integer greater than one. N?1 bipolar plates include a first layer made of a first material, a second layer made of a second material, a center portion, and first and second sides extending transversely relative to the center portion. A battery enclosure including a cover and a lower portion including sides defining a cavity. The N?1 bipolar plates are arranged in the cavity between adjacent ones of the N battery cores and the N battery cores are connected in series by the N?1 bipolar plates. The first and second sides of the N?1 bipolar plates are one of inserted into L-shaped slots in the sides of the lower portion, and molded into the sides of the lower portion.

A battery assembly, such as a bipolar battery assembly can be fabricated using an optical welding process. For example, a stack of biplate assemblies can be assembled including aligning the biplate assemblies using a fixture, the fixture having at least one feature sized and shaped to engage a corresponding feature in a first casing portion in the stack of biplate assemblies. The stack of biplate assemblies can be compressed. A second casing portion comprising an optically-transmissive region can be mated to the first casing portion. An optically-absorbing region of the first casing portion can be irradiated through an optically-transmissive portion of the second casing portion to form a weld structure along at least one edge of the second casing portion.

The power storage device includes power storage units arranged with a conductive plate interposed therebetween in the vertical direction, each of the power storage units includes an electrode stack including bipolar electrodes stacked with a separator interposed therebetween, and a sealing member provided around the electrode stack so as to seal a housing space formed between adjacent electrodes of the electrode stack. At least one of the power storage units is provided with an overhang member on an outer peripheral surface of the sealing member. The overhang member includes an inclined portion that extends from the outer peripheral surface of the sealing member toward the outside of the power storage unit and inclines downward as it leaves away from the outer peripheral surface of the sealing member, and a top portion formed at a lower end of the inclined portion.

A power storage device includes a plurality of laminated power storage modules, a flow path member disposed in contact with the power storage modules and having flow paths for allowing a cooling medium to flow along a first direction intersecting a laminating direction of the power storage modules, a pair of restraining plates disposed to sandwich the power storage modules and the flow path member in the laminating direction, fastening members applying a restraining load to the power storage modules and the flow path member via the pair of restraining plates by fastening the restraining plates to each other, and a lead-in duct disposed at one end portion of the flow path member in the first direction and leading the cooling medium into each of the flow paths.

A pressure control valve structure includes a wall portion having a plurality of communication holes communicating with their associated internal spaces, a plurality of projections protruding outwardly from a wall surface of the wall portion so as to surround their associated communication holes, a plurality of elastic valve bodies closing their associated communication holes in contact with the projections, an outer peripheral wall portion protruding from the wall surface so as to surround the plurality of projections collectively, and a cover made of a resin and fixed to the outer peripheral wall portion, the cover compressing the elastic valve bodies towards their associated projections. The cover has a thick-walled portion where the cover is made partially thick in an outer surface of the cover.

A bipolar lead-acid storage battery has both life performance to withstand long-term operation and high capacity performance. Positive electrode current collector plates include a lead alloy sheet, a mass loss per total surface area of a test piece is 100 mg/cm.sup.2 or less when measured after the test piece is placed in sulfuric acid at a concentration of 38 mass % maintained at a temperature of 60 C., and a continuous anodization performed at a constant potential of 1,350 mV on a reference electrode for 28 days. A thickness of the collector plate arranged on one surface of a substrate that covers both a side of a positive electrode and a side of a negative electrode of a cell member is between 0.10 mm and 0.50 mm, and a ratio of a volume of the current collector plate to a rated capacity of the battery is between 0.11 and 0.67.