A battery pack having at least one battery module including at least one battery cell, a case tray configured to support the at least one battery module, a case cover coupled to the case tray such that the at least one battery module is located between the case tray and the case cover, and a sealing gasket disposed between the case tray and the case cover to prevent penetration of moisture or foreign substances into the battery module is provided. The sealing gasket includes at least one position guide configured to guide positioning of the sealing gasket between the case tray and the case cover when the case tray and the case cover are coupled to each other.

A battery pack having at least one battery module including at least one battery cell, a case tray configured to support the at least one battery module, a case cover coupled to the case tray such that the at least one battery module is located between the case tray and the case cover, and a sealing gasket disposed between the case tray and the case cover to prevent penetration of moisture or foreign substances into the battery module is provided. The sealing gasket includes at least one position guide configured to guide positioning of the sealing gasket between the case tray and the case cover when the case tray and the case cover are coupled to each other.

A sealing member is one used for a cylindrical lithium-ion battery. The sealing member is interposed between a bottom-closed cylindrical case and a cap, is made of perfluoropolymer, and has dimensions that meet the following relational expressions: when an axial distance from a cap upper surface to a leading end portion in a case is defined as HC, an axial distance from the cap upper surface to a leading end portion in the sealing member is defined as HG, a thickness of the sealing member is defined as TG, a value of TG divided by HG is defined as X (=TG/HG), and a value of HG divided by HC is defined as Y (=HG/HC),

X>0.800TG−0.324  (1)

Y<−0.778TG+1.670  (2)

Y>0.594X.sup.2−1.176X+0.913  (3).

A secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a can accommodating the electrode assembly, the can being formed by bending a plate-shaped member into a pipe shape and welding edges facing each other; a first side plate sealing an open end of the can; a second side plate sealing another open end of the can; a first side terminal electrically connected to the first electrode plate and exposed to the outside through the first side plate; a second side terminal electrically connected to the second electrode plate and exposed to the outside through the second side plate; and a safety vent on one side of the can opposite to a side at where the edges facing each other are welded.

A secondary battery includes: an electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a can accommodating the electrode assembly, the can being formed by bending a plate-shaped member into a pipe shape and welding edges facing each other; a first side plate sealing an open end of the can; a second side plate sealing another open end of the can; a first side terminal electrically connected to the first electrode plate and exposed to the outside through the first side plate; a second side terminal electrically connected to the second electrode plate and exposed to the outside through the second side plate; and a safety vent on one side of the can opposite to a side at where the edges facing each other are welded.

A battery includes an outer encasement member configured to accommodate an electrode body that is quadrilateral in plan view. The outer encasement member has a recessed portion that is quadrilateral in plan view and configured to accommodate the electrode body, and is provided with a joint portion at an outer peripheral end portion. A corner portion of the recessed portion is provided with a projection extending toward the joint portion.

A battery includes an outer encasement member configured to accommodate an electrode body that is quadrilateral in plan view. The outer encasement member has a recessed portion that is quadrilateral in plan view and configured to accommodate the electrode body, and is provided with a joint portion at an outer peripheral end portion. A corner portion of the recessed portion is provided with a projection extending toward the joint portion.

The present disclosure provides a secondary battery, which comprises an electrode assembly, a pouch, an electrode lead and an insulating tape. The electrode assembly is received in the pouch, the electrode lead is connected with the electrode assembly and extends to the outside of the pouch in a length direction. The electrode assembly comprises electrode plates and a separator, the separator separates the electrode plates. An outer surface of the electrode assembly comprises a first surface and a second surface, an area of the second surface is smaller than an area of the first surface. The first surface is provided as two in number, and the two first surfaces face each other in a thickness direction; the second surface is provided as two in number, and the two second surfaces face each other in a width direction, each second surface connects two first surfaces. At least a part of the insulating tape is provided on the second surface; in the length direction, at least one end of the insulating tape exceeds the electrode plate.

A power storage module including: a stacked body that includes electrodes stacked along a first direction; a sealing body that includes a first sealing portion joined to an edge portion of each of the electrodes, forms an inner space between the electrodes adjacent to each other, and seals the inner space; and an electrolytic solution that is stored in the inner space and includes an alkali solution. The electrodes include bipolar electrodes, and a negative terminal electrode. The power storage module includes surplus spaces different from the inner space on a route of an alkali creep phenomenon in which the electrolytic solution reaches the outside from the inner space through the negative terminal electrode.

A zinc-air battery cell assembly comprising: a layer of anode material; one or more layers of cathode material; a separator directly between and engaging both the layer of anode material and the layer of cathode material that acts as both an electronic insulator and an ion conductive path between the layer of anode material and the layer of cathode material; and a diffusion member directly engaging the layer of cathode material.