Abstract: A power storage cell includes: an electrode body in which a sheet member is wound so as to surround a winding axis; and a case in which the electrode body is housed, in which: the sheet member includes an electrode sheet and a separator; the electrode sheet includes a current collector plate and an electrode composite material layer fabricated on the current collector plate; the electrode sheet includes a groove portion extending in a direction of the winding axis, in which the electrode composite material layer is not fabricated; a plurality of the groove portions is fabricated in a direction in which the electrode sheet extends; and an interval between the groove portions on a winding inner side is smaller than an interval between the groove portions on a winding outer side.

Abstract: A case constituting an outer shape of a second cooler disposed between the battery cells and containing a second fluid having a lower thermal conductivity than the first fluid therein is constituted by a buffer member capable of expanding and contracting in accordance with a flow rate of the second fluid in the case, and the control unit increases a flow rate of the second fluid to be supplied to the second cooler when the temperature of the battery cell is equal to or higher than a predetermined threshold value than when the temperature of the battery cell is lower than the threshold value.

Abstract: A battery module includes: a plurality of battery cells each including a metal layer and a heat seal layer, the plurality of battery cells having a laminate film in which an electrode body is accommodated and a heat seal layer in a peripheral edge portion is joined; a case in which the battery cells are accommodated in a state of being laminated in a thickness direction; and a heat conductive member provided on an inner wall of the case so as to be in contact with the metal layer exposed from the peripheral edge portion and configured to dissipate heat from the battery cells.

Abstract: A battery module comprising: a plurality of battery cells; and a container containing the battery cells, wherein the container includes a housing containing the battery cells; and a plate-shaped member thermally connected to the housing and partitioning a space in which the battery cells of the housing are accommodated into a plurality of spaces, wherein the plate-shaped member includes a thermally conductive elastic body and a thermally conductive plate disposed on one or both sides of the thermally conductive elastic body.

Abstract: A power storage cell according to the present disclosure includes a wound electrode body and a cell case. The wound electrode body includes a cathode and an anode. The cell case accommodates the wound electrode body. The cell case includes a case body and a lid. The case body opens in one direction. The lid closes the case body. The lid includes a cathode external terminal, an anode external terminal, and an insulating member. The cathode external terminal is directly joined to the case body. The anode external terminal is electrically connected to the anode. The insulating member electrically insulates the cathode external terminal and the anode external terminal. The cathode external terminal is electrically connected to the cathode via the case body.

Abstract: In an energy storage cell according to the present disclosure, a wound electrode assembly includes a first electrode and a second electrode. A first current collector member is connected to the first electrode. A second current collector member is connected to the second electrode. A lid includes a first external terminal and a second external terminal. The first external terminal is disposed so as to overlap the radial center of the wound electrode assembly as viewed in an axial direction. The second external terminal is fixed to a case body. The first current collector member is connected to the first external terminal. The second current collector member is disposed between the case body and the second external terminal. The second current collector member is joined to the second external terminal by being, together with the second external terminal, fixed to the case body.

Abstract: In a power storage cell according to the present disclosure, the first electrode of the wound electrode assembly includes a sheet-shaped current collector and an electrode composite material layer formed on the current collector. The current collector includes a coated portion on which the electrode composite material layer is coated and an uncoated portion on which the electrode composite material layer is not coated. The uncoated portion protrudes from the coated portion to one side in the axial direction of the wound electrode assembly. The case houses the wound electrode assembly, and includes a cylindrical wall portion and a bottom portion. The cylindrical wall portion is provided so as to cover the outer peripheral side of the wound electrode assembly. The bottom portion is disposed on one side in the axial direction, connected to one end of the cylindrical wall portion, and joined to the uncoated portion by welding.

Abstract: In the energy storage cell according to the present disclosure, the first wound electrode assembly includes a first positive electrode and a first negative electrode. The second wound electrode assembly includes a second positive electrode and a second negative electrode. The second positive electrode is not in contact with the first positive electrode. The second negative electrode is not in contact with the first negative electrode. The second wound electrode assembly is formed by winding around the first wound electrode assembly on the outer peripheral side of the first wound electrode assembly. The positive electrode current collector member is electrically connected to both the first positive electrode and the second positive electrode. The negative electrode current collector member is electrically connected to both the first negative electrode and the second negative electrode.

Abstract: In a power storage cell, a current collector plate includes a central portion, an outer peripheral edge, a spoke, a first piece, and a second piece. The central portion is disposed to overlap with a center of the wound electrode body when viewed from an The outer peripheral edge is located on the outer peripheral side of the 5 axial direction. central portion. One of the outer peripheral edge and the central portion is connected to the case to electrically connect the current collector plate to the first external terminal. The spoke connects the central portion and the outer peripheral edge. The first piece extends from the central portion toward the outer peripheral edge and is connected to the first electrode. The second piece extends from the outer peripheral edge toward the center portion and is connected to the first electrode.

Abstract: A method of manufacturing a power storage cell includes: forming a wound electrode assembly by winding a positive electrode, a negative electrode, and a separator; fixing a winding end portion, in a winding direction, of the wound electrode assembly, by a fixing member; housing, in a cell case, the wound electrode assembly having the winding end portion fixed by the fixing member; injecting an electrolyte solution in the cell case; and releasing fixing of the winding end portion by the fixing member, after the wound electrode assembly is housed in the cell case and the electrolyte solution is injected in the cell case.

Abstract: The power storage cell includes a cell case, a first two-dimensional identification code, and a second two-dimensional identification code. The cell case is configured to be capable of accommodating an electrode body. The first two-dimensional identification code is provided on an outer surface of the cell case. The first two-dimensional identification code is configured to be able to read the identification information. The second two-dimensional identification code is provided on the outer surface of the cell case spaced apart from the first two-dimensional identification code. The second two-dimensional identification code is configured to be able to read the same identification information as the first two-dimensional identification code. The second two-dimensional identification code is provided at a position where at least a part of the first two-dimensional identification code cannot be visually recognized when the second two-dimensional identification code is viewed from the front.

Abstract: A cathode sheet (first electrode sheet) of a power storage cell includes a long side (first long side) located at an end portion on a Z1 side (one side in an axial direction). An anode sheet (second electrode sheet) includes a long side (second long side) located at an end portion on the Z1 side. The cathode sheet includes a cathode current collector (first current collector) and a cathode composite material layer (first electrode material layer). A cathode uncoated portion of the cathode current collector is formed on the long side and includes a plurality of piece portions (first piece portions) disposed in an X direction (winding direction). An insulating portion (first insulating portion, insulating member) is formed on the long side of the anode sheet.

Abstract: The power storage cell includes a wound electrode body, a case, an internal gasket (a seal member), a positive electrode terminal (an external terminal), and a positive electrode connecting portion (a connecting member). The case includes a peripheral wall portion, a lower lid (first lid portion), and an upper lid (second lid portion). The lower lid has an exhaust valve for exhausting the gas in the case. A through hole (second through hole) is formed in the upper lid (second lid). The positive electrode connecting portion includes a columnar portion extending in the Z direction so as to penetrate the through hole of the upper lid and the through hole (first through hole) of the inner gasket. The inner gasket is disposed so as to cover the through hole from the inside of the case.

Abstract: The power storage module includes a plurality of electricity storage cells (cylindrical power storage cells), a column portion arranged so as to be surrounded by the plurality of electricity storage cells, and a case accommodating the plurality of electricity storage cells. The column portion extends along the Z direction. The length of the column portion in the Z direction (axial direction) is larger than the length of each of the plurality of power storage cells in the Z direction.

Abstract: Provided is a laminated battery that exhibits high volume energy efficiency and allows preventing intrusion of an insulating material between layers during production of the battery. A laminated battery disclosed herein includes a first collector layer, a first electrode layer, a solid electrolyte layer, a second electrode layer and a second collector layer. The first electrode layer opposes the second electrode layer across the solid electrolyte layer. An insulating layer is provided at an edge of the second electrode layer, in at least one edge of the laminated battery.

Abstract: An energy storage cell according to the present disclosure includes a wound electrode assembly and a cell case. The cell case includes an outer peripheral wall portion, a first end portion, a second end portion, and an inner peripheral wall portion. The first end portion has a first hole. The second end portion has a second hole. The inner peripheral wall portion extends from the first hole to the second hole. The inner peripheral wall portion is disposed inside the wound electrode assembly in a radial direction. A portion of the outer peripheral wall portion that is located next to the wound electrode assembly in the radial direction has a rectangular tubular outer shape. A portion of the inner peripheral wall portion that is located next to the wound electrode assembly in the radial direction has a rectangular tubular outer shape.

Abstract: A battery module includes a battery cell and a heat dissipation member that is in contact with a battery cell case. The battery cell includes an electrode body including plural layered structures layered one on another, each including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and the battery cell case that hermetically encloses the electrode body inside the battery cell case. The battery cell case includes at least a metal layer and a fusion resin layer disposed at the inner face side of the metal layer and has an exposed portion, at which the metal layer is exposed, at at least part of the outer face of the battery cell case. The heat dissipation member is in contact with the exposed portion.

Abstract: A battery cell includes: an electrode body including plural layered structures, each including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; and a battery cell case that hermetically encloses the electrode body inside the battery cell case. At least one of the current collector in the positive electrode or the current collector in the negative electrode has, on a peripheral portion of a surface thereof, an uncoated portion at which the mix is not coated. A current collector of which the distance from the surface of the battery cell case is the greatest among current collectors each having an uncoated portion has a first uncoated portion, and the first uncoated portion extends to the outside of the battery cell case, thereby forming a first exposed portion.

Abstract: The power storage cell includes a case, an electrolyte solution, and an electrode assembly. The electrode assembly includes a first electrode, a second electrode, a separator, and an interposition film. The first electrodes and the second electrodes are alternately stacked. The separator separates the first electrode from the second electrode. The interposition film is interposed between the first electrode and the separator. The interposition film includes a first region and a second region in a plane orthogonal to the stacking direction of the first electrode and the second electrode. The first region includes the center of the interposition film in a plane. The second region surrounds the periphery of the first region. The interposition film satisfies the relationship of the formula (1) “T2<T1”. T1 represents the thickness of the interposition film in the first region. T2 represents the thickness of the interposition film in the second region.

Abstract: A power storage cell includes: an electrode assembly. The electrode assembly includes a plurality of positive electrodes and a plurality of negative electrodes disposed side by side in a thickness direction, and a separator. The electrode assembly has a shape longer in a width direction. The electrode assembly includes an upper portion, a bottom portion, a first end portion, and a second end portion. A first welding portion is formed in the first end portion. A second welding portion is formed in the second end portion. A third welding portion in contact with the first welding portion and a fourth welding portion in contact with the second welding portion are formed in the bottom portion. The third welding portion and the fourth welding portion are disposed at an interval with a central portion of the bottom portion being interposed between the third welding portion and the fourth welding portion.