Abstract: Battery module includes: battery stack including a plurality of batteries that are stacked, each of the plurality of batteries having valve portion; duct plate configured to cover a first surface of battery stack on which a plurality of valve portions are disposed, duct plate having gas discharge duct that temporarily stores a gas blown off from valve portions of respective batteries; cover plate placed on duct plate; flow path portion defined by duct plate and cover plate, flow path portion being connected to gas discharge duct through opening, flow path portion extending in a first direction that intersects with stacking direction of the batteries, flow path portion allowing leaking of the gas in gas discharge duct to an outside of battery module; and gas restricting wall portion disposed in gas discharge duct between valve portion and opening.

Abstract: The battery module includes: battery stack including a plurality of batteries that are stacked, each of the plurality of batteries having valve portion; duct plate configured to cover a surface of battery stack on which the plurality of valve portions are disposed, duct plate having gas discharge duct that is connected to valve portions of the respective batteries, and temporarily stores a blown-off gas; cover plate placed on duct plate; and flow path portion defined by duct plate and cover plate, flow path portion extending from gas discharge duct in a first direction that intersects with stacking direction and allowing leaking of the gas in gas discharge duct to an outside of battery module. Cover plate has opening through which a midst portion of flow path portion is communicable with the outside of the battery module.

Abstract: To achieve both formability and heat insulating properties, separator according to an aspect of the present invention insulates adjacent battery cells. Separator includes heat insulation sheet including a fiber material and a heat insulation material including higher heat insulating properties than the fiber material, and formed member including higher shape stability than the heat insulation sheet. This enables shape of heat insulation sheet including high flexibility to be maintained using formed member formed into a predetermined shape.

Abstract: In order to enhance the safety of a battery module, battery module (1) including battery stack (2) that has a plurality of batteries stacked, each of the batteries having a valve part that releases gas inside the battery; exhaust duct (38) that is connected to the valve part of each battery; and shock absorbing layer (39) that is disposed on a surface of first wall portion (34) of exhaust duct (38) facing the valve part, the surface facing an inside of the exhaust duct, shock absorbing layer (39) having a smaller elastic modulus than first wall portion (34).

Abstract: The power supply device includes a plurality of battery cells each having a rectangular outer shape, a plurality of separators configured to insulate adjacent battery cells, and a restraining member assembling the plurality of battery cells and the plurality of separators. Each of separators includes interposed plate disposed between adjacent battery cells, heat insulating member having a sheet-like shape and disposed between interposed plate and adjacent battery cells, peripheral wall protruding from interposed plate toward adjacent battery cells and defining a housing space housing adjacent battery cells, and a plurality of ribs provided inside peripheral wall. The plurality of ribs holds heat insulating member.

Abstract: A battery pack includes a battery unit including rectangular secondary batteries, each including a sealing plate and positive and negative electrode terminals attached to the sealing plate; a bus bar that connects the rectangular secondary batteries together in parallel; an insulating plate disposed between the sealing plates of the rectangular secondary batteries and the bus bar; and a short-circuit breaking portion that interrupts an electric conduction path between the rectangular secondary batteries connected in parallel by allowing each sealing plate to bulge outward in response to an internal pressure rise of the battery to push up the insulating plate and the bus bar. A portion of each sealing plate that bulges most protrudes outward by greater than or equal to 1.5 mm from an outer peripheral edge of the sealing plate when a pressure in the corresponding rectangular secondary battery reaches the operating pressure of a gas release valve.

Abstract: The power supply device includes a plurality of battery cells each having a square outer shape, a plurality of separators for insulating the adjacent battery cells, and a restraining member that assembles the plurality of battery cells and the plurality of separators. Each of separators has heat insulating properties. Further, each of separators is disposed between the plurality of battery cells. Further, each of separators includes contact portion that comes into contact with adjacent battery cell, and thin portion formed thinner than contact portion.

Abstract: In order to prevent induction of thermal runaway with a simple structure, a battery system incudes battery stack (2) formed by stacking a plurality of battery cells (1) and cooling plate (3) thermally coupled to battery cell (1) of battery stack (2). Heat insulating material (6) is disposed between battery cells (1) of battery stack (2), which are adjacent to each other, and heat insulating material (6) insulates heat between battery cells (1) adjacent to each other. In addition, cooling plate (3) cools battery cell (1), is used in combination with an endothermic material having heat capacity to absorb thermal runaway energy of battery cell (1), and prevents induction of thermal runaway.

Abstract: Provided is power supply device configured for safe discharge to the outside of the power supply device even when gas at high temperature and under high pressure is discharged from a secondary battery cell, power supply device including: a plurality of secondary battery cells each having gas discharge valve for discharging internal gas; and cover part disposed on one surface of battery stack with the plurality of secondary battery cells stacked while covering gas discharge valve of each of the plurality of secondary battery cells. Cover part is provided inside with a gas guide path partitioned to discharge gas discharged from gas discharge valve to the outside of cover part, and the gas guide path includes one or more horizontal gas flow bending portions that bend at least a flow direction of some of the gas in plan view of cover part.

Abstract: A power supply device includes a plurality of rectangular battery cells stacked in the thickness direction, and a plurality of separators interposed between adjacent battery cells. The separator includes an insulating separator frame that forms a defined space surrounded in a frame shape, and a separator core that is inserted into the defined space surrounded by the separator frame and is disposed between the adjacent battery cells.

Abstract: A battery system includes a battery block having a plurality of square battery cells (1) stacked in one direction, parallel connection bus bars (5X), insulating plate (7), and lid plate (8) fixed to insulating plate (7). Each square battery cell (1) has a discharge port provided with discharge valve (14) and a sealing plate provided with positive and negative electrode terminals via an insulating material. Parallel connection bus bars (5X) are connected to the electrode terminals to connect some or all of square battery cells (1) in parallel. Insulating plate (7) is disposed on the surfaces of sealing plates of the plurality of square battery cells (1) and includes passing portions having openings provided at positions corresponding to the discharge ports to pass the exhaust gas ejected from the discharge ports and pressing portions (22) disposed between parallel-connection bus bars (5X) and the sealing plates. Lid plate (8) faces discharge ports facing the openings of the passing portions.

Abstract: A plurality of battery cells each having a prismatic shape, a fixing member that fixes the plurality of battery cells in a stacked state, and a thermal insulation sheet that is sandwiched between stacking surfaces of battery cells and thermally insulates the adjacent battery cells, wherein thermal insulation sheet is an inorganic fiber sheet in which inorganic fibers are aggregated in a three-dimensionally non-directional manner and fine voids are provided between the inorganic fibers.

Abstract: A battery module, a power storage device, a power storage system, an electronic appliance, an electric vehicle, and a power system that can detect the voltage of a plurality of battery cells more accurately are provided. The power storage device includes a connection terminal portion which is coupled with terminal planes of a plurality of battery cells constituting battery columns. The connection terminal portion includes a coupling portion including a first coupling portion configured to couple at least with a first battery column and a second coupling portion configured to couple at least with a second battery column adjacent to the first battery column, and an extension portion extended from an end of the coupling portion in a longitudinal direction. The extension portion is provided at a predetermined position.

Abstract: There is provided a battery system including parallel-connected bus bars each connecting the plurality of prismatic battery cells in parallel, and a safety mechanism configured to be capable of interrupting a current path of prismatic battery cells connected in parallel by the parallel-connected bus bars, where the sealing plate of one of the prismatic battery cells convexly deforms due to a rise in an internal pressure of this prismatic battery cell when an abnormality occurs, the sealing plate that has convexly deformed comes into contact with the parallel-connected bus bars to form external short circuitry between the electrode terminals that are positive and negative of one prismatic battery cell connected in parallel to the prismatic battery cell with the abnormality, and external short circuitry activates the safety mechanism that interrupts a current flowing into the prismatic battery cell with the abnormality.

Abstract: A coolant passage, which is included in a cooling plate thermally coupled to a plurality of battery cells and includes longitudinal coolant passages connected to an inlet side and an outlet side for a coolant and lateral coolant passages connecting the longitudinal coolant passages in parallel with each other, cools the battery cells by allowing the coolant to flow in both the longitudinal coolant passages and the lateral coolant passages via the cooling plate.

Abstract: A short circuit current interruption method of a battery system including: stacking a plurality of prismatic battery cells and connecting the plurality of prismatic battery cells with a parallel connection bus bar in parallel to form a battery block, wherein a sealing plate of the prismatic battery cell is a plate material having flexibility that deforms when an internal pressure rises due to an internal short circuit, and when a rise in the internal pressure due to the internal short circuit of the prismatic battery cell causes deformation, the deformation of the sealing plate is detected, and when an amount of deformation exceeds a setting value, the short circuit current of the battery connected in parallel with the internally short circuited battery is interrupted.

Abstract: A power supply device includes secondary battery cells disposed adjacent to each other and a separator that is interposed between the secondary battery cells adjacent to each other. The separator is made of a flexible material that has both a heat insulating property and restoring force such that the separator deforms when being pressed by each of the secondary battery cells and recovers an original shape of the separator. This configuration provides an improved heat insulating property between the secondary battery cells and prevents thermal propagation caused by thermal runaway. At the same time, this allows the separator to adapt to deformation of a secondary battery cell that has thermally swelled. In response to contraction of the swelled battery, the separator recovers its original shape to maintain a mechanical pressing force. This allows the power supply device to provide increased mechanical stability and maintain resistance to vibration and impact.

Abstract: A plurality of battery cells is disposed at a fixed position in a battery holder. Each of the battery cells includes an end surface provided with a discharge port of a discharge valve as an exhaust side end surface, and an end surface opposite to the exhaust side end surface as a non-exhaust side end surface. A discharge duct is connected to the discharge port of the battery cell. Further, a stopper that prevents deformation of the non-exhaust side end surface due to an internal pressure is disposed at a position opposite to the non-exhaust side end surface of the battery cell.

Abstract: An electric storage device is provided. The electric storage device includes a case, first and second terminals, a conduction state switch, an electronic component and a cover member including a connecting portion. The case has a first opening and a second opening on a first surface of the case and is configured to house a battery unit including a first terminal portion and a second terminal portion. The conduction state switch is provided between the first terminal portion of the battery unit and the first terminal of the case. The conduction state switch is in a conducting state when the connecting portion of the cover member is connected with the conduction state switch and the cover member is attached to the first surface of the case and covers the first opening, the second opening, the first terminal and the second terminal.

Abstract: There is provided a power storage system comprising a plurality of battery lines and a connection terminal unit. Each battery line comprises a plurality of battery cells arranged in a first direction. The connection terminal unit is electrically connected to terminal faces of each battery cell of a group of the battery cells, and the group of the battery cells is disposed in a second direction. At least one cut out is formed in the connection terminal unit. There are also provided a power storage system for a house, a power storage system for a vehicle, an electronic device and an electric vehicle including the power storage device. There is also provided a connection terminal unit for electrically connecting a plurality of battery cells, in which at least one cut out is formed in the connection terminal unit.