Abstract: A battery case includes: an inner case that includes an inner gas discharge hole for discharging the gas generated in batteries accommodated in a battery accommodating chamber to the outside of the battery accommodating chamber; an outer case that has an inner case accommodating chamber accommodating the inner case and includes an outer gas discharge hole for discharging the gas to the outside; a plurality of ribs that extend from the outer surface of the inner case to the inner surface of the outer case, to position the inner case with respect to the outer case, and are arranged at intervals from each other; and one or more gas guide passages defined by an outer surface of the inner case, an inner surface of the outer case, and the plurality of ribs and configured to guide a gas from the inner gas discharge hole to the outer gas discharge hole.

Abstract: A battery case includes: a battery container including a battery containing chamber containing a plurality of batteries, and an inner gas discharge hole for discharging a gas generated in the batteries on at least one side in a height direction of the batteries fixed to the battery containing chamber; and one or more gas exhaust passages including first and second corner passage parts that are located inside an outer wall part including an outer surface in contact with an outer region and outside the battery container and extend along the height direction, and an outer gas discharge hole for discharging the gas to the outside, the one or more gas exhaust passages guiding the gas from the inner gas discharge hole to the outer gas discharge hole.

Abstract: Provided is a battery pack (10) the reliability of which can be enhanced. This battery pack (10) accommodates a secondary battery (14) inside a case (12). The battery pack includes: an exhaust port (22) that provides communication between an internal space of the case (12) for accommodating the secondary battery (14) and the outside and that discharges gas discharged from the secondary battery (14) from the inner space to the outside; and a heat exchange body (24) that is provided to the exhaust port (22) and is formed of a porous material having a three-dimensional mesh structure so that gas passes therethrough.

Abstract: A power storage pack includes: at least one storage device including a gas discharging part that discharges a gas produced inside; a porous member that has a structure in which a plurality of fire extinguishing agent grains are collected and has an air gap inside; and a case that stores the storage device and the porous member. Each fire extinguishing agent grain is a collection of a plurality of fire extinguishing agent powders, and the porous member is provided such that the gas flows in the air gap.

Abstract: A linear actuator includes: a coil that is movably provided; a coil yoke that is provided to move integrally with the coil; a first side yoke portion that extends outside of the coil; a second side yoke portion that is surrounded by the coil, extends, and is opposed to the first side yoke portion; and a magnet that forms a magnetic field between the first side yoke portion and the second side yoke portion. The coil yoke extends along an axis of the coil. The first side yoke portion and the second side yoke portion have a first hold portion and a second hold portion, the support portion supporting the coil yoke in a stop position and having magnetic polarities.

Abstract: A linear actuator includes: a coil that is movably provided; a coil yoke that is provided to move integrally with the coil; a first side yoke portion that extends outside of the coil; a second side yoke portion that is surrounded by the coil, extends, and is opposed to the first side yoke portion; and a magnet that forms a magnetic field between the first side yoke portion and the second side yoke portion. The coil yoke extends along an axis of the coil. The first side yoke portion and the second side yoke portion have a first hold portion and a second hold portion, the support portion supporting the coil yoke in a stop position and having magnetic polarities.