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 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: 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: 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 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: 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: 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: In the cell case of the power storage cell according to the present disclosure, the cylindrical main body portion is formed by forming a film into a cylindrical shape, and the first opening portion and the second opening portion are formed at both ends thereof, respectively. The first sealing body closes the first opening portion. The second sealing body closes the second opening portion. The first sealing body includes an outer peripheral face that is in contact with an inner peripheral face of the cylindrical main body portion. The outer peripheral face includes a main body surface portion and a protruding portion. The main body surface portion extends in parallel to a first direction in which the first opening portion and the second opening portion are arrayed. The protruding portion protrudes from the main body surface portion toward the cylindrical main body portion.

Abstract: The present invention includes: a primary joining process in which a coarse portion having a predetermined width is formed in the vicinity of a step side face within a plasticized region while the rotary tool is being moved one round along a first butted portion to perform friction stirring in a state that a tip of a tip side pin of a rotary tool being rotated is inserted to the same depth as or slightly deeper than a step bottom face and an outer circumferential face of a base side pin is in contact with a front face of a sealing body and the tip side pin is slightly in contact with at least an upper portion of a jacket body; and an inspection process in which a passed position of the tip side pin is specified by performing a flaw detection to detect the coarse portion.

Abstract: A power storage module includes a case that houses a plurality of electrode assemblies. The case includes a case body and at least one partition portion. The case body surrounds the plurality of electrode assemblies. The partition portion is located between the electrode assemblies adjacent to each other to partition an accommodation space of the case body. The partition portion includes a pair of resin layers and a metal layer. The pair of resin layers is formed integrally with the case body and the resin layers are arranged in a first direction. The metal layer is located between the resin layers and extends in a direction orthogonal to the first direction.

Abstract: A power storage module has a case including a case body and at least one partition portion. The case body surrounds a plurality of electrode assemblies. The partition portion is located between the electrode assemblies adjacent to each other to partition an accommodation space of the case body. In the accommodation space of the case body, the partition portion forms a first compartment and a second compartment adjacent to the first compartment with the partition portion interposed between the first compartment and the second compartment. A first cooling path and a second cooling path are formed in the case, the first cooling path extends in a portion 10 of the case that faces the first compartment without the second compartment in between, and the second cooling path extends in a portion of the case that faces the second compartment without the first compartment in between.

Abstract: A method for manufacturing a liquid cooling jacket has a feature of using a primary joining rotary tool provided with a tip side pin and a base side pin having a taper angle larger than a taper angle of the tip side pin and comprising a first primary joining process in which inserting the tip side pin and the base side pin of the rotary tool that is rotating into the sealing body member and moving the rotary tool along the first abutted portion with an outer circumferential face of the base side pin being in contact with a front face of the sealing body member and with the outer circumferential face of the tip side pin being kept off a step side face of the peripheral wall step portion while having a second aluminum alloy of the sealing body member flow into the gap.

Abstract: The automatic joining system includes: a fixing device; a friction stir device; a measuring unit; and a controlling device, in which a rotating tool includes a base end side pin and a tip end side pin formed continuously to the base end side pin, the controlling device sets a target moving route along which the rotating tool moves when friction stir joining of a butting portion is performed, based on a ridge line position before the friction stir joining is performed, and also sets a modified moving route at a position displaced toward a first metallic member side in substantially parallel with respect to the target moving route, and the friction stir device controls the rotating tool to move along the modified moving route and thereby performing the friction stir joining along the target moving route.

Abstract: Provided is a method for manufacturing a liquid-cooled jacket, to reduce the size of a recessed groove on a surface of a metal member and also to reduce roughness of a jointed surface. The method includes: a placing step of placing a sealing body on a jacket body, a first main joining step of performing friction stirring by moving a main joining rotary tool around to a first overlapped portion, and a second main joining step of performing friction stirring to a second overlapped portion. The main joining rotary tool has a base-end-side pin and a tip-end-side pin. A taper angle of the base-end-side pin is greater than a taper angle of the tip-end-side pin and a stairs-like pin step portion is formed on an outer circumferential surface of the base-end-side pin.

Abstract: The invention has a feature of comprising a butting process of forming a stepped butted portion and a joining process of performing friction-stir-welding on the stepped butted portion, wherein the rotary tool includes a base side pin having a taper angle larger than a taper angle of a tip side pin, and a pin step portion in a staircase shape is formed on an outer circumferential face of the base side pin, and wherein in the joining process, a rotation direction and a translation method of the rotary tool are set such that the second metal member is on an advancing side, a target angle by which a rotation axis of the rotary tool is inclined toward the second metal member is set such that a burr formed on a front face of the second metal member after the joining process has a thickness between 0 and 130 ?m.

Abstract: A liquid cooling jacket is produced by forming a first butted portion where a step side face of a peripheral wall portion and an outer peripheral side face of a sealing body butt each other and a third butted portion where a step side face of a support pillar portion and a hole wall of the hole portion of the sealing body portion butt each other with a gap, and friction-stirring by inserting a tip side pin and a base side pin of a primary joining rotary tool that is rotating into the sealing body and moving the primary joining rotary tool along the third butted portion with an outer circumferential face of the tip side pin being kept off the step side face while having a second aluminum alloy of the sealing body flow into the gap.