A battery lid is formed of a metal plate integrally formed with a valve and a surrounding plate portion surrounding the valve which facilitates rupturing the valve at a predetermined pressure. The valve includes a pressure receiving plate portion having a bending groove, and bendable from the bending groove by applied pressure, and a thin plate portion thinner than the thickness of the surrounding plate portion, and connects the pressure receiving plate portion to the surrounding plate portion. The thin plate portion has a rupture groove passing through extension sections on the respective lines extending from the bending groove. As the pressure receiving plate portion is deformed by the pressure applied to the valve, the extension sections are pulled more strongly than are the other sections in the valve. Therefore, when a predetermined pressure is applied, the valve is ruptured from the extension sections of the rupture groove.

A power storage device includes a case, a power storage element disposed in the case, a lead connected to an electrode of the power storage element, a sealing member sealing an opening of the case. The sealing member includes a gasket and a sealing plate having conductivity. The gasket includes a base having a disk shape. The base is disposed between the sealing plate and the power storage element. The base has a through-hole formed therein. The sealing plate includes a protrusion inserted in the through-hole. The protrusion of the sealing plate is connected to the lead. The protrusion is configured to be displaced in a direction away from the lead in accordance with an increase of an internal pressure of the case so as to be disconnected from the lead.

Disclosed are a battery box, a battery cell, a battery, and a method and apparatus for preparing the battery box. The battery box includes a pressure relief region including a first recess arranged at an inner surface of the battery box and a second recess arranged at an outer surface of the battery box, the first recess being arranged opposite to the second recess, wherein a third recess is provided at a bottom wall of the first recess and/or a bottom wall of the second recess, and the pressure relief region is configured to fracture at the third recess, when an internal pressure of the battery box reaches a threshold, to relieve the internal pressure. According to the battery box, the battery cell, the battery, and the method and apparatus for preparing the battery box disclosed in the present application, the pressure relief region is easy to machine.

A secondary battery includes a battery element including a positive electrode, a negative electrode, and an electrolytic solution, a housing member configured to accommodate the battery element, and a safety valve mechanism attached to the housing member. The safety valve mechanism includes a valve member including an opening valve portion configured to be opened; and an opening member including a plurality of opening portions radially arranged in a region opposed to the opening valve portion from a center of the region as a base point, and a plurality of protrusion portions radially arranged in a region outside the plurality of opening portions from the center and the plurality of protrusion portions protrude toward the plurality of opening portions. A number of the opening portions and a number of the protrusion portions are equal to each other, and each of the plurality of opening portions and each of the plurality of protrusion portions are opposed to each other in a direction toward the center.

A cylindrical secondary battery configured to have a structure to which an adhesion unit, including an adhesive material, a conductive material, and a gas-generating material, is provided. The adhesion unit is configured to couple a cap assembly, which functions as a positive electrode terminal of the cylindrical secondary battery, and a positive electrode tab of a jelly-roll type electrode assembly to each other.

A battery housing includes at least one membrane-like degassing element which is designed to yield when a hot gas of the at least one battery cell is released into an interior of the battery housing, and in so doing to open up a degassing opening in the housing wall for discharging the hot gas from the interior to an area surrounding the battery housing, and at least one protective cap which, for protecting the at least one degassing element against environmental influences, is arranged on an outer side of the housing wall in a manner overlapping the at least one degassing element and which is fastened to the housing wall by way of a holding device, wherein the holding device is designed to yield, and to completely release the protective cap from the degassing opening, when the hot gas is discharged via the at least one degassing element.

A battery pack includes: a plurality of battery modules; a venting inducing frame disposed along an edge of the battery modules and forming a venting passage; a venting gate for connecting an inside of the battery modules and the venting inducing frame; a rupture portion formed on an outside of the venting inducing frame; and a unidirectional valve formed on a passage of the venting inducing frame, wherein the unidirectional valve intercepts a passage in a direction connected to a venting gate connected to a second battery module from the venting gate connected to one battery module from among the battery modules, and opens a passage in a direction connected to the rupture portion from the venting gate connected to one battery module from among the battery modules.

An assembly for supplying power to an aircraft is disclosed having at least one battery housed in a respective housing, each housing comprising a wall in which a through-opening is arranged, and an exhaust device including a discharge duct connecting each housing opening to a common discharge port, a valve mounted on each opening. Each valve includes a membrane arranged so as to seal the opening closed and having a surface of pressure application towards the inside of the housing and a surface of pressure application towards the outside of the housing. The surface of pressure application towards the outside of the housing is larger than the surface of pressure application towards the inside of the housing, so that the membrane bursts at a bursting pressure inside the housing that is lower than a bursting pressure reached outside the housing.

A thermal management system (270) for rechargeable secondary batteries having an electrically insulating material (262) lining the interior of a metal case (260). One or more cell packs (24) made of individual cells (12) arranged within end frames (220) is disposed in the metal case (260). A thermally conductive granular filler (264) occupies the interstices (264A) between the individual cells (12) and the space between the cell pack and the electrically insulating material liner (262). The thermally conductive filler (264) decreases the thermal impedance from the cell pack (24) to the exterior surface of the metal case (260) to reduce cell pack temperature and increase battery life

A secondary battery includes an electrode assembly and an electrolyte that are inserted and injected into a pouch. An edge of the pouch is sealed to form a sealing portion. The secondary battery also includes a valve fixed to the sealing portion. The valve includes a body forming a passage having opened one end facing the inside of the pouch and provided with a chamber connected to the passage, wherein a discharge hole communicating with the outside is formed in the chamber. The valve also includes a gate seated on a hook protrusion forming a boundary between the passage and the chamber to open or close the passage. The valve also includes a spring mounted to apply elastic force in a direction in which the gate is closed.