A mounting seat for a pressure relief device. The mounting seat comprises a main body portion, a blocking portion and a lug. The main body portion has a circular cross section. The blocking portion is circumferentially arranged on an outer surface of the main body portion and is formed by extending outward from the outer surface of the main body portion. The lug is located below the blocking portion and is separated from the blocking portion by a distance, and the lug extends outward from the outer surface of the main body portion. The pressure relief device of the present application, through its rotation, may be securely mounted to a housing of the battery pack, without requiring additional mounting parts and tools, which greatly simplifies the mounting process of the battery pack.

Certain aspects relate to a battery pack for electric vertical take-off and landing aircraft. Exemplary battery pack includes a first pouch cell, a second pouch cell, at least a sensor, where the at least a sensor is configured to sense battery pack data and transmit the battery pack data to a data storage system, and a vent configured to vent the ejecta from the first pouch cell. In some embodiments, battery pack may be configured to power at least a propulsor component.

Certain aspects relate to a battery pack for electric vertical take-off and landing aircraft. Exemplary battery pack includes a first pouch cell, a second pouch cell, at least a sensor, where the at least a sensor is configured to sense battery pack data and transmit the battery pack data to a data storage system, and a vent configured to vent the ejecta from the first pouch cell. In some embodiments, battery pack may be configured to power at least a propulsor component.

The present application provides an energy storage system, including a first shell, a battery pack, a sealing member, a first explosion-proof valve and a second explosion-proof valve. The battery pack is arranged inside the first shell and includes a second shell and a battery. The sealing member is arranged between the first shell and the second shell, and a space between the first shell and the second shell is fluidly isolated from an inner space of the sealing member. The first explosion-proof valve is mounted on the second shell to communicate with an inner space of the second shell and the inner space of the sealing member when the first explosion-proof valve is opened. The second explosion-proof valve is mounted on the first shell to communicate with the inner space of the sealing member and an outer space of the first shell when the second explosion-proof valve is opened.

The present application provides an energy storage system, including a first shell, a battery pack, a sealing member, a first explosion-proof valve and a second explosion-proof valve. The battery pack is arranged inside the first shell and includes a second shell and a battery. The sealing member is arranged between the first shell and the second shell, and a space between the first shell and the second shell is fluidly isolated from an inner space of the sealing member. The first explosion-proof valve is mounted on the second shell to communicate with an inner space of the second shell and the inner space of the sealing member when the first explosion-proof valve is opened. The second explosion-proof valve is mounted on the first shell to communicate with the inner space of the sealing member and an outer space of the first shell when the second explosion-proof valve is opened.

Systems are presented herein for venting pressure and heat from a battery pack. The system may include a set of walls encompassing a plurality of battery cells. Embedded in the walls may be a plurality of venting structures, which may be configured to release pressure and/or temperature building within the battery pack. The plurality of venting structures may include a plurality of valves, including a fixed valve configured to vent at a first flow rate, and a movable valve configured to vent at a second flow rate exceeding the first flow rate. The plurality of venting structures may also include a deformable vent structure configured to physically deform to provide a third flow rate exceeding the second flow rate.

Systems are presented herein for venting pressure and heat from a battery pack. The system may include a set of walls encompassing a plurality of battery cells. Embedded in the walls may be a plurality of venting structures, which may be configured to release pressure and/or temperature building within the battery pack. The plurality of venting structures may include a plurality of valves, including a fixed valve configured to vent at a first flow rate, and a movable valve configured to vent at a second flow rate exceeding the first flow rate. The plurality of venting structures may also include a deformable vent structure configured to physically deform to provide a third flow rate exceeding the second flow rate.

The present invention concerns a fire safety arrangement for a battery. More particularly, but not exclusively, this invention concerns a fire safety arrangement for a metal ion battery, for example a lithium ion battery. A metal ion battery cell comprises a plurality of electrodes and an electrolyte encased within a housing. The housing comprises a safety valve or vent configured to allow gas build up within the housing to vent outside the housing. A fabric band surrounds the housing, such that the fabric band covers the safety valve or vent. This may allow gas to pass through the fabric band, but contain sparks generated by the battery cell within the fabric band.

A pressure relief valve includes a bowl-shaped housing having a bottom wall and an annular sealing wall, wherein the sealing wall delimits a valve through-opening, and a jacket wall. A cover is provided for covering a housing opening of the housing opposite to the bottom wall, having a diaphragm holder extending in the direction of the bottom wall. A diaphragm is provided for covering the valve through-opening, wherein the diaphragm is connected to the diaphragm holder and disposes the diaphragm holder sealingly on the annular sealing wall such that the valve through-opening is closed.

Certain aspects relate to a battery pack for an electric vehicle. Exemplary battery pack includes a first pouch cell and a vent configured to vent the ejecta from the first pouch cell. The first pouch cell includes at least an outer coating, at least a first pair of electrodes, at least a first pair of foil tabs electrically connected to the at least a first pair of electrodes, at least a first insulator layer located substantially between the at least a first pair of foil tabs, a first pouch substantially encompassing the at least a first pair of foil tabs and the at least a first insulator layer, and a first electrolyte within the first pouch. The battery pack is also configured to power at least a propulsor component.