A lead-acid battery (100) is provided with a lid (14). A communication chamber (520) is formed inside the lid (14). In the communication chamber (520), a first distance between an inner wall (432) and a vent hole (321) in a sidewall (506, 522) is shorter than a second distance between the inner wall (432) and a communication hole (328.330), and a tip (432A) of the inner wall (432) on the other side in the first direction is formed at a position on the other side in the first direction than the vent hole (321).

A power storage device includes: a power storage module in which an electrolytic solution is accommodated, the power storage module including a top face, a bottom face, and a plurality of side faces provided such that the side faces connect the top face to the bottom face; a liquid discharge valve provided on at least one of the side faces; a liquid collection unit configured to collect the electrolytic solution discharged from the liquid discharge valve; an accumulation portion in which the electrolytic solution collected by the liquid collection unit is accumulated; a corrosion portion configured to corrode due to the electrolytic solution; and a detection portion configured to detect breakage of the corrosion portion. The corrosion portion is placed in a passage route along which the electrolytic solution collected by the liquid collection unit reaches the accumulation portion.

An apparatus includes a battery stack including a plurality of alternating anodes and cathodes, wherein each of the anodes is positioned between first and second separators, and wherein a tab of the anode extends out from between the first and second separators, and an edge tape extending across a top of the first and second separators.

A lead-acid battery (100) is provided with a lid (14). An external flow passage (530) communicating with a communication chamber (520) through a vent hole (321) and communicating with a discharge port (405) of a lid (14) is formed inside the lid (14). A compartment fence (452, 454) continuously extending over the entire width of the external flow passage (530) is formed in the external flow passage (530). A residual volume is larger than the volume of the communication chamber (520), the residual volume being obtained by subtracting, from the total volume of a plurality of external spaces (460, 462, 464) divided by the compartment fence (452, 454), the volume of the discharge-side external space (464) closest to the discharge port among the plurality of external spaces.

A lead-acid battery (100) is provided with a lid (14). A communication chamber (520) is formed inside the lid (14). The communication chamber (520) is provided with an internal flow passage forming part (432, 522) forming an internal flow passage (Q) which communicates with a vent hole (321) and is located on the other side in a first direction than the vent hole (321). At least a part of the surface of the internal flow passage forming part (432, 522) has an uneven part (T).

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 battery has an electrode body which has an outer periphery and includes positive and negative electrodes with a separator disposed there between in a stacking direction. The battery further include an exterior body having a shape other than a substantially rectangular parallelepiped or cuboidal shape. The electrode body and an electrolytic solution are housed in the exterior body. The exterior body has at least first, second and third inner surfaces with the first and third inner surfaces being located on opposite sides of the second inner surface. The second inner surface is larger in area than the first and second inner surfaces. A liquid injection port is located in the exterior body and extends through the second inner surface. Each of the first, second and third inner surfaces faces and is spaced from a respective first, second and third section of the outer periphery of the electrode body by a respective gap so as define first, second and third regions, respectively, each of which has a respective volume. The volume the second region is larger than the volumes of the first and third regions and is capable of temporarily holding a volume of the electrolytic solution injected into the outer case via the liquid injection port.

An apparatus and a method of detecting liquid leakage within a battery pack using a gyro sensor and a moisture detecting sensor. When liquid leakage of a coolant is detected, such as when a pipe of a coolant supplied for cooling (radiating heat) within a battery pack is damaged, the apparatus recognizes a liquid leakage generation position according to a slope of the battery pack by using a gyro sensor and determines whether the liquid leakage is generated based on a difference in a temperature between an upper side and a lower side of a corresponding region by using moisture detecting sensors, thereby improving accuracy of the detection of the liquid leakage according to the slope and the position of the battery pack. Particularly, the moisture detecting sensor is operated to be on only when the detection of the liquid leakage is required, thereby preventing unnecessary energy consumption.

The present application can provide a battery module case applicable to an automation process, a battery module comprising the same, a battery pack comprising such a battery module and an automobile comprising such a battery module or pack. The present application can provide a battery module at low cost by applying an automation process.

An apparatus includes a battery stack including a plurality of alternating anodes and cathodes, wherein each of the anodes is positioned between first and second separators, and wherein a tab of the anode extends out from between the first and second separators, and an edge tape extending across a top of the first and second separators.