Abstract: A power storage device includes a lower case including a bottom portion, a power storage stack thermally contacting the bottom portion, a cooler disposed below the bottom portion, and a heat conduction member provided between the bottom portion and the cooler, wherein the cooler includes a cooling portion and a pair of holding portions, the heat conduction member includes a pair of first linear portions extending along the pair of holding portions, and a plurality of second linear portions extending along the cooling portion, the cooling portion has a cooling surface contacting the plurality of second linear portions, and, in a cross section of the cooling portion perpendicular to a direction in which the cooling portion extends, a total sum of widths of air layers each formed between the plurality of second linear portions is less than or equal to 14% of a width of the cooling surface.

Abstract: A method of manufacturing adhered components includes a process of applying adhesive to application areas on a surface of a first component, a process of placing a second component above the first component, and a process of pressurizing the second component toward the first component. In the pressurization process, the load applied to a pressurizer changes while sequentially undergoing a curvilinear increase period in which the load increases in a curved line as the compression amount of the adhesive increases, and a rapid increase period in which the load increases in a polygonal line with respect to the trajectory of the load in the curvilinear increase period as the compression amount increases. During pressurization by the pressurizer, the load is detected by a load sensor, the rapid increase period is detected based on the detection value of the load sensor, and the pressurization is stopped during the rapid increase period.

Abstract: Provided is a method for manufacturing a secondary cell by which a wound body can be effectively impregnated with an electrolytic solution. The method includes: a step of depressurizing an interior of an outer case 30; a step of pouring an electrolytic solution E into the depressurized outer case 30; a step of depressurizing the interior of the outer case 30; a step of pouring the electrolytic solution E into the depressurized outer case 30; a step of impregnating the wound body with the electrolytic solution E from both axial end portions 100a, 100b of a wound body 100; a step of waiting until a difference in pressure between a wound body external space S, which is a space between the outer case 30 and the wound body, and a wound body internal space S1 is reduced after the impregnation with the electrolytic solution E; and a step of pressurizing the wound body external space S.

Abstract: The present invention provides a method for producing a secondary battery, capable of forming a uniform membrane on a wound body. Provided is a method including a step for reducing an internal pressure of an exterior, a step for pouring an electrolyte solution (E) into the exterior, a step for sealing the exterior, a step for impregnating the electrolyte solution (E) into the wound body from both axial end portions thereof, a step for performing initial charging of a battery, and a step for performing high-temperature aging of the battery. The additive LPFO is added into the electrolyte solution (E) in an amount such that the internal pressure of the exterior in the step for performing the high-temperature aging becomes equal to or higher than a saturation vapor pressure of the electrolyte solution (E) in the high-temperature aging.

Abstract: Provided is a nonaqueous electrolyte secondary battery with better battery performance than in the past, by forming an SEI coat with very little non-uniformity on the surface of the negative electrode active material layer. The invention provides a nonaqueous electrolyte secondary battery in which an electrode assembly including a positive electrode, a separator, and a negative electrode, and a nonaqueous electrolyte are contained in a battery case. In this secondary battery, the nonaqueous electrolyte contains a crown ether that forms a complex with a sodium ion, and the negative electrode includes a negative current collector, a negative electrode active material layer containing a negative electrode active material formed on the surface of the current collector, and a coat including an oxalato complex structure and provided on at least part of the surface of the negative electrode active material layer.

Abstract: A laminated structure is manufactured using an extruder die in which an ejection port is provided, the laminated structure including a core layer, a first surface layer, and a second surface layer. The extruder die includes a first surface layer material conveyance path through which a raw material of the first surface layer is conveyed, a second surface layer material conveyance path through which a raw material of the second surface layer is conveyed, and a core layer material conveyance path through which a raw material of the core layer is conveyed. The paths merge at the ejection port. The extruder die has a shape in which a downstream portion downstream of a merging location that is the ejection port does not contact the injected laminated structure formed of the raw materials. The laminated structure is injected by causing viscous fluids as the raw materials into the paths, respectively.

Abstract: A battery clamping device includes: interposition member configured to be interposed between rectangular parallelepiped batteries such that interposition member is stacked with a plurality of the batteries alternately; clamping portion configured to clamp by pressing the stacked batteries and interposition member in a stacking direction of the batteries and the interposition member from outside in the stacking direction.

Abstract: A laser welding apparatus for joining a first member and a second member together by laser welding includes: a first laser beam applying device that applies a laser beam to a border area between the first member and the second member; and a second laser beam applying device that applies a laser beam to a laser beam application spot of each of the first member and the second member, the laser beam application spot being located ahead of a laser beam application spot to which the laser beam is applied by the first laser beam applying device, in a laser welding forward direction.

Abstract: Provided is a nonaqueous electrolyte secondary battery with better battery performance than in the past, by forming an SEI coat with very little non-uniformity on the surface of the negative electrode active material layer. The invention provides a nonaqueous electrolyte secondary battery in which an electrode assembly including a positive electrode, a separator, and a negative electrode, and a nonaqueous electrolyte are contained in a battery case. In this secondary battery, the nonaqueous electrolyte contains a crown ether that forms a complex with a sodium ion, and the negative electrode includes a negative current collector, a negative electrode active material layer containing a negative electrode active material formed on the surface of the current collector, and a coat including an oxalato complex structure and provided on at least part of the surface of the negative electrode active material layer.

Abstract: The present invention provides a method for producing a secondary battery, capable of forming a uniform membrane on a wound body. Provided is a method including a step for reducing an internal pressure of an exterior, a step for pouring an electrolyte solution (E) into the exterior, a step for sealing the exterior, a step for impregnating the electrolyte solution (E) into the wound body from both axial end portions thereof, a step for performing initial charging of a battery, and a step for performing high-temperature aging of the battery. The additive LPFO is added into the electrolyte solution (E) in an amount such that the internal pressure of the exterior in the step for performing the high-temperature aging becomes equal to or higher than a saturation vapor pressure of the electrolyte solution (E) in the high-temperature aging.

Abstract: A laminated structure is manufactured using a mold in which an injection port is provided, the laminated structure including a core layer, a first surface layer, and a second surface layer. The mold includes a first surface layer material conveyance path through which a raw material of the first surface layer is conveyed, a second surface layer material conveyance path through which a raw material of the second surface layer is conveyed, and a core layer material conveyance path through which a raw material of the core layer is conveyed. The paths merge at the injection port. The mold has a shape in which a downstream portion downstream of a merging location that is the injection port does not contact the injected laminated structure formed of the raw materials. The laminated structure is injected by causing viscous fluids as the raw materials into the paths, respectively.

Abstract: Provided is a method for manufacturing a secondary cell by which a wound body can be effectively impregnated with an electrolytic solution. The method includes: a step of depressurizing an interior of an outer case 30; a step of pouring an electrolytic solution E into the depressurized outer case 30; a step of depressurizing the interior of the outer case 30; a step of pouring the electrolytic solution E into the depressurized outer case 30; a step of impregnating the wound body with the electrolytic solution E from both axial end portions 100a, 100b of a wound body 100; a step of waiting until a difference in pressure between a wound body external space S, which is a space between the outer case 30 and the wound body, and a wound body internal space S1 is reduced after the impregnation with the electrolytic solution E; and a step of pressurizing the wound body external space S.

Abstract: Disclosed is a method for manufacturing a sealed battery capable of reducing leakage of helium gas introduced into an exterior. A method for manufacturing a sealed battery according to the present invention includes a leak testing step for detecting leak of helium gas (H) introduced into an exterior (30), a processing step for increasing apparent specific gravity of the helium gas (H) by mixing the helium gas (H) and the hydrocarbon gas with specific gravity larger than that of the helium gas (H) to prepare mixed gas (G), an introducing step for introducing the helium gas (H) into the exterior (30) with the apparent specific gravity of the helium gas (H) increased by introducing the mixed gas (G), and a sealing step for sealing the exterior (30) into which the helium gas (H) is introduced.

Abstract: A laser welding apparatus for joining a first member and a second member together by laser welding includes: a first laser beam applying device that applies a laser beam to a border area between the first member and the second member; and a second laser beam applying device that applies a laser beam to a laser beam application spot of each of the first member and the second member, the laser beam application spot being located ahead of a laser beam application spot to which the laser beam is applied by the first laser beam applying device, in a laser welding forward direction.

Abstract: Disclosed is a method for manufacturing a sealed battery capable of reducing leakage of helium gas introduced into an exterior. A method for manufacturing a sealed battery according to the present invention includes a leak testing step for detecting leak of helium gas (H) introduced into an exterior (30), a processing step for increasing apparent specific gravity of the helium gas (H) by mixing the helium gas (H) and the hydrocarbon gas with specific gravity larger than that of the helium gas (H) to prepare mixed gas (G), an introducing step for introducing the helium gas (H) into the exterior (30) with the apparent specific gravity of the helium gas (H) increased by introducing the mixed gas (G), and a sealing step for sealing the exterior (30) into which the helium gas (H) is introduced.

Abstract: A battery clamping device includes: interposition member configured to be interposed between rectangular parallelepiped batteries such that interposition member is stacked with a plurality of the batteries alternately; clamping portion configured to clamp by pressing the stacked batteries and interposition member in a stacking direction of the batteries and the interposition member from outside in the stacking direction.

Abstract: The present disclosure provides a battery, which includes a case having through holes, electric terminals projecting outward from the case and fixed to the holes, and insulating members interposed between the case and the terminals. A flanged portion standing out from the case, located around the hole is formed, a reinforcing member is fitted to the outer periphery of the flanged portion that reinforces against the outward force applied to the flanged portion, and the terminal and the insulating member are inserted into the flanged portion, and then the flanged portion is press-fitted from the outside of the case for fixing the terminal to the hole. The battery may have a high sealing property at the fitted portion among the case and the terminal.

Abstract: Provided is a technology for detecting abnormal temperature rise of a battery regardless of the number of batteries, and preventing a trouble caused by abnormal temperature rise. A battery production facility (30) for producing a secondary battery (1) comprises an abnormality detector (40) for detecting abnormal state (especially, abnormal temperature rise) of a plurality of secondary batteries (1, 1, . . . ), and a detector (45) for generating a control signal in order to take a predetermined step according to the detection result from the abnormality detector (40).

Abstract: A method for producing a solid-state cell which makes it possible to produce a highly reliable solid-state cell that suppresses a decrease in the thickness of the solid electrolyte layer and a short circuit between the positive and negative electrodes, and which is highly flexible in the size and shape of the solid electrolyte layer and electrodes. The method comprising: a structure preparing step for preparing a first structure, a second structure, or a third structure, a solid electrolyte material powder layer, and a positive electrode material powder layer are stacked, in this sequence; an insulating member disposing step for disposing a heat-resistant insulating member which is in contact with an outer periphery of the structure in the stacking direction of the structure and surrounds the outer periphery; and a heat-compressing step for heat-compressing the structure and heat-resistant insulating member, in the stacking direction of the structure.

Abstract: The first aspect of the present invention is a terminal unit which contains an electrode part disposed in a case, for connecting with an electrode body and a terminal part having a rod shape with a first end and a second end, the first end for fixing to the electrode part, and the second end extending outside of the case. In one embodiment of the first aspect of the invention, the electrode part includes an insert hole into which the terminal part is inserted, the terminal part comprises an insert portion having an insert portion having a larger diameter than that of the hole and formed at the first end and a tip portion having a smaller diameter than that of the hole and formed at the nearer side of the first end than the insert portion. And, the clinch portion is press fitted into the insert hole, thereby fixing the terminal part to the electrode part. According to the present invention, the varying of electric conductivity in the terminal unit is prevented.