The present invention is a method for manufacturing a secondary battery. An electrode assembly and an electrolyte are accommodated into a body of a battery case. The body of the battery case has an accommodation part and a gas pocket part, and a passage that extends from the accommodation part to the outside discharges an internal gas from the accommodation part through the gas pocket part. The battery case is seated in a seating step on a support block, which has an inclined part on a side surface thereof, to support the battery case. The body is pressed to discharge a gas accommodated in the accommodation part through the gas pocket part in the battery case. This method allows easy discharging of internal gas while reducing discharge of the electrolyte with the gas.

[Problem] To provide a separator (AGM separator) for valve-regulated lead acid batteries that does not undergo delamination due to bonding between the separators even under severe conditions (a pressure in winding, a high temperature and a high humidity in transportation and storage).

[Means for Resolution] A separator (AGM separator) for valve-regulated lead acid batteries, containing a microglass fiber and a heat-fusible organic fiber, the separator having a thickness under a pressure of 20 kPa of more than 0.50 mm and less than 1.80 mm and having a bonding strength between the separators after being left for 48 hours under a pressure of 5 to 10 kPa in an environment of a temperature of 70° C. and a humidity of 75′% of less than 0.10 N.
[Selected Drawing] None

[Problem] To provide a separator (AGM separator) for valve-regulated lead acid batteries that does not undergo delamination due to bonding between the separators even under severe conditions (a pressure in winding, a high temperature and a high humidity in transportation and storage).

[Means for Resolution] A separator (AGM separator) for valve-regulated lead acid batteries, containing a microglass fiber and a heat-fusible organic fiber, the separator having a thickness under a pressure of 20 kPa of more than 0.50 mm and less than 1.80 mm and having a bonding strength between the separators after being left for 48 hours under a pressure of 5 to 10 kPa in an environment of a temperature of 70° C. and a humidity of 75′% of less than 0.10 N.
[Selected Drawing] None

An end cap assembly, a battery cell, a battery, and an electrical device are provided. The end cap assembly is applicable to a battery cell. The end cap assembly includes: an end cap body; a pressure relief component, connected to the end cap body, where a first through-hole configured to inject an electrolytic solution is made on the pressure relief component, and the pressure relief component is configured to be actuated when an internal pressure of the battery cell reaches a threshold, so as to release the internal pressure of the battery cell; and a closing component, detachably disposed on the pressure relief component, where the closing component is configured to close the first through-hole.

Systems and methods are provided to vent a battery pack using a pressure release valve. The pressure release valve comprises a housing configured to be secured to an outer surface of a sidewall of a battery pack. A first membrane is arranged in a first side of the housing. A second membrane in a second side of the housing and adjacent to the first membrane.

Systems and methods are provided to vent a battery pack using a pressure release valve. The pressure release valve comprises a housing configured to be secured to an outer surface of a sidewall of a battery pack. A first membrane is arranged in a first side of the housing. A second membrane in a second side of the housing and adjacent to the first membrane.

Systems and methods are provided to vent a battery pack system. The battery pack system comprises a first wall positioned in a first portion of a vehicle and a second wall positioned in a second portion of the vehicle. A first plurality of pressure release valves is embedded in the first wall, wherein the first plurality of pressure release valves is arranged release gas from between the first wall and another feature or component of the battery pack system. A second plurality of pressure release valves is embedded in the second wall, wherein the second plurality of pressure release valves are arranged to enable the egress of gas from between the second wall and another feature or component of the battery pack system.

Systems and methods are provided to vent a battery pack system. The battery pack system comprises a first wall positioned in a first portion of a vehicle and a second wall positioned in a second portion of the vehicle. A first plurality of pressure release valves is embedded in the first wall, wherein the first plurality of pressure release valves is arranged release gas from between the first wall and another feature or component of the battery pack system. A second plurality of pressure release valves is embedded in the second wall, wherein the second plurality of pressure release valves are arranged to enable the egress of gas from between the second wall and another feature or component of the battery pack system.

A pressure control valve structure includes a wall portion having a plurality of communication holes communicating with the internal space, a plurality of tubular portions surrounding the communication holes and extending outwardly from a wall surface of the wall portion as a proximal end, an elastic valve body disposed in each of the tubular portions and having a first end surface and a second surface opposite from the first surface, an outer peripheral wall surrounding the plurality of tubular portions collectively, and a cover fixed to the outer peripheral wall. The tubular portions are spaced from the cover. The tubular portions has an inner wall surface that includes an inclined surface that is inclined downwardly in a gravity direction from the proximal end of the tubular portion to a distal end of the tubular portion with a compression direction of the elastic valve body set extending horizontally.

A pressure control valve structure includes a wall portion having a plurality of communication holes communicating with the internal space, a plurality of tubular portions surrounding the communication holes and extending outwardly from a wall surface of the wall portion as a proximal end, an elastic valve body disposed in each of the tubular portions and having a first end surface and a second surface opposite from the first surface, an outer peripheral wall surrounding the plurality of tubular portions collectively, and a cover fixed to the outer peripheral wall. The tubular portions are spaced from the cover. The tubular portions has an inner wall surface that includes an inclined surface that is inclined downwardly in a gravity direction from the proximal end of the tubular portion to a distal end of the tubular portion with a compression direction of the elastic valve body set extending horizontally.