The present invention relates to a battery cell refillable with an electrolyte, an electrolyte refilling system for a battery pack configured to include a plurality of battery cells, and an electrolyte refilling method for a battery pack of an electric vehicle.

Systems and methods for fire suppression, a fire suppression system including a container configured to receive frames, each of the frames including battery modules; a pipe system including at least one vertically extending pipe, the at least one vertically extending pipe configured to be provided between a respective two of the frames and configured to supply suppressant to at least one of the battery modules of each of the respective two of the frames via slots of the vertically extending pipe; at least one tank connected to the pipe system and configured to store the suppressant; at least one pump configured to recirculate the suppressant to the pipe system or a tank of the at least one tank; and an inlet body configured to connect with a suppressant source, that is external to the container, to provide new suppressant into the pipe system or the at least one tank.

A liquid reserve battery including: a collapsible storage unit having a collapsible cavity for storing a liquid electrolyte therein; and a battery cell in communication with an outlet of the collapsible storage unit, the battery cell having gaps dispersed therein. Wherein the collapsible storage unit includes: a top plate having three or more first sides; a bottom plate having three or more second sides, each of the three or more first sides being angularly offset from a corresponding one of the three or more second sides about a central axis, the top plate being linearly offset from the bottom plate in a longitudinal direction along the central axis; and for each of the three of more first sides, first and second triangular sidewalls connecting the top plate bottom plate and each other.

A power storage device includes power storage cells that includes a positive electrode, a negative electrode, a separator, and an accommodation chamber accommodating a liquid electrolyte in a liquid-tight manner. The power storage device includes a cell stack in which the power storage cells are stacked in series. A side surface of the cell stack is covered with a seal portion made of a plastic. A terminal positive electrode current collector and a terminal negative electrode current collector located in the outermost layer of the cell stack are made of a high thermal conductivity material having a thermal conductivity greater than or equal to 100 W/(m.Math.K). The power storage device includes a positive electrode cooling unit, which cools the terminal positive electrode current collector, and a negative electrode cooling unit, which cools the terminal negative electrode current collector. The liquid electrolyte contains an ester compound.

A power storage device includes power storage cells that includes a positive electrode, a negative electrode, a separator, and an accommodation chamber accommodating a liquid electrolyte in a liquid-tight manner. The power storage device includes a cell stack in which the power storage cells are stacked in series. A side surface of the cell stack is covered with a seal portion made of a plastic. A terminal positive electrode current collector and a terminal negative electrode current collector located in the outermost layer of the cell stack are made of a high thermal conductivity material having a thermal conductivity greater than or equal to 100 W/(m.Math.K). The power storage device includes a positive electrode cooling unit, which cools the terminal positive electrode current collector, and a negative electrode cooling unit, which cools the terminal negative electrode current collector. The liquid electrolyte contains an ester compound.

A battery pack includes a plurality of battery cell stacks, each battery cell stack including a plurality of battery cells; a battery pack case configured to receive the plurality of battery cell stacks, wherein the battery pack case includes a pack case space portion located adjacent to a first side of a first battery cell stack; and a beam located adjacent to a second side of the first battery cell stack; the battery pack case being hollow and configured to store a coolant; and an outlet in the battery pack case.

A battery pack includes a plurality of battery cell stacks, each battery cell stack including a plurality of battery cells; a battery pack case configured to receive the plurality of battery cell stacks, wherein the battery pack case includes a pack case space portion located adjacent to a first side of a first battery cell stack; and a beam located adjacent to a second side of the first battery cell stack; the battery pack case being hollow and configured to store a coolant; and an outlet in the battery pack case.

The present invention relates to a secondary battery in which a stacked electrode assembly having a cathode, an anode and a separator is accommodated together with an electrolytic solution between exterior members. In the present invention, the secondary battery has a plurality of joint parts at which the outer peripheral portion of the separator is joined with the exterior members and a holding part formed at least between the joint parts so as to hold therein the electrolytic solution, wherein a sum of perimeters of the joint parts is longer than a perimeter of a rectangle of minimum area enclosing therein all of the joint parts. In this configuration, it is possible to refill the stacked electrode assembly with the electrolytic solution and protect the joint parts from breakage while preventing displacement of the stacked electrode assembly in the secondary battery.

The present invention relates to a secondary battery in which a stacked electrode assembly having a cathode, an anode and a separator is accommodated together with an electrolytic solution between exterior members. In the present invention, the secondary battery has a plurality of joint parts at which the outer peripheral portion of the separator is joined with the exterior members and a holding part formed at least between the joint parts so as to hold therein the electrolytic solution, wherein a sum of perimeters of the joint parts is longer than a perimeter of a rectangle of minimum area enclosing therein all of the joint parts. In this configuration, it is possible to refill the stacked electrode assembly with the electrolytic solution and protect the joint parts from breakage while preventing displacement of the stacked electrode assembly in the secondary battery.

An object is especially to provide a metal-air battery unit that has a compact configuration including a water supply space and an electrical system space. The metal-air battery unit of the present invention includes a unit main body including a plurality of metal-air battery cells, a water supply space supplying an electrolyte to the metal-air battery cells and an electrical system space coupling to a positive electrode and a negative electrode of the metal-air battery cell to control a battery output, disposed on an outer surface of the unit main body.