Abstract: A secondary battery herein disclosed includes a case main body. The case main body accommodates a power generating element in the inside. The case main body includes a first member and a second member. The first member is bottomed cylindrical and formed from one metal plate by a drawing process. The shape of the second member is cylindrical. The second member is joined in a state fitting the second member to a cylindrical portion of the first member.

Abstract: The present disclosure provides an electrode terminal with high conductivity and high junction strength. The electrode terminal disclosed herein includes a metallic first member and a metallic plate-shaped second member, wherein the first member has a connecting portion to be connected to the second member, and the connecting portion of the first member is bonded to one surface of the second member by a conductive adhesive.

Abstract: According to the present disclosure, the thermal deterioration of metal junction parts formed on a contact interface of constitution members of electrode terminals is suppressed. The electrode terminal of the secondary battery disclosed herein includes a first member having a plate-shaped connection part and a plate-shaped second member connected to the connection part of the first member in a surface-contact manner. Then, the technique disclosed herein includes a metal junction part and a heat-insulating part formed on a contact interface between a connection part of the first member and the second member, and the heat-insulating part is formed outward of the metal junction part in a radial direction centered on the metal junction part. Due to this constitution, the heat-insulating part can block great heat even when such a great heat is applied to a region outside the heat-insulating part, and therefore, the heat deterioration of the metal junction part can be suppressed.

Abstract: A terminal component includes a first metal and a second metal overlapped on the first metal. At least three biting portions in which an edge of one of the first metal and the second metal bites into the other metal is provided at an interface where the first metal and the second metal are overlapped.

Abstract: A terminal component includes a first metal and a second metal overlapped on the first metal. At a boundary between the first metal and the second metal, there is a joint portion in which the first metal and the second metal are joined by metal joining. The second metal has a groove on the outside of the joint portion on the surface opposite to the surface overlapped on the first metal.

Abstract: A terminal component includes a first metal and a second metal overlapped on the first metal, the first metal having a part to be connected to an internal terminal, and the second metal having a part to be exposed to the outside of a battery case. At an interface where the first metal and the second metal are overlapped, one of the first metal and the second metal has a protrusion having a flat top portion. The other metal is joined to the top portion. A cross section of the protrusion orthogonal to a projection direction of the protrusion is set such that fusing occurs when a current equal to or higher than a predetermined current value flows between the first metal and the second metal.

Abstract: The present disclosure provides a technique for constructing an electrode terminal with superior conductivity. An electrode terminal disclosed herein includes: a first member which has a connecting portion that is exposed to outside of the case; and a second member which is a plate-shaped conductive member arranged outside of the case. In addition, the connecting portion penetrates the case and the second member and forms a cap portion having a flat plate shape outside of the second member. Furthermore, a plurality of recessed portions are formed on an upper surface of the cap portion, and a bonding portion due to an intermetallic bond is formed on a boundary, which is between the first member and the second member, below each of the recessed portions. Accordingly, a contact resistance between the first member and the second member can be reduced and conductivity of the electrode terminal can be improved.

Abstract: The present disclosure provides a method for producing a nonaqueous electrolyte secondary battery that allows a nonaqueous electrolyte solution to permeate, reliably and in a short time, into a wound electrode body. The method for producing a nonaqueous electrolyte secondary battery includes at least a winding step of forming a wound electrode body, a terminal connection step of connecting an electrode terminal to the wound electrode body, and a sealing step of accommodating the wound electrode body inside a battery case, and thereafter sealing the battery case. The production method disclosed herein includes, between the winding step and the terminal connection step, a permeation step of immersing a wound electrode body in a nonaqueous electrolyte solution, and repeatedly pressing and releasing the wound electrode body.

Abstract: Provided is an electrode sheet manufacturing apparatus that forms an electrode sheet by cutting a sheet stack including an electrode composite material layer and a separator provided on the electrode composite material layer. The electrode sheet manufacturing apparatus includes a laser irradiation device that irradiates the sheet stack with a first laser beam having a wavelength to be absorbed by the separator and a second laser beam having a wavelength to be absorbed by the electrode composite material layer, and a controller that controls driving of the laser irradiation device. The controller moves an irradiation position of the first laser beam relative to the sheet stack and moves an irradiation position of the second laser beam so as to follow a track of the irradiation position of the first laser beam.

Abstract: Provided is a method for manufacturing an electrode terminal formed of different kinds of metals excellent injunction strength.

Abstract: A secondary battery includes a flat wound electrode body in which an electrode sheet is wound, and an electrode terminal. The electrode sheet has a current collector, an electrode active material layer which is formed on a surface of the current collector, and a non-formation portion in which the electrode active material layer is not formed on the surface of the current collector. The wound electrode body has a first end portion in which a rounded portion is formed. A first slit is formed along a winding direction in the non-formation portion at the first end portion. A flat surface portion to which the electrode terminal is joined is provided in a portion positioned further toward opposite than the first slit from the electrode active material layer in a portion of the non-formation portion at the first end portion.

Abstract: A secondary battery terminal is provided which is constituted by dissimilar metals and which has a structure capable of preventing liquid from penetrating into a boundary between the dissimilar metals of the terminal. The terminal disclosed herein includes a plate-like metallic first member and a second member which is metallically joined to one plate surface of the first member and which is constituted by a metal that differs from a metal constituting the first member. A first stepped portion constituted by an end of the second member, which is more protruded than the one plate surface of the first member, is formed at a boundary between the plate surface and the metallically-joined second member and, further, a second stepped portion which protrudes from the one plate surface of the first member is formed on the plate surface.

Abstract: The technique disclosed herein provides a terminal that enables welding with an external member to be realized without requiring surface treatment of a metallic portion having been pressure-welded during ultrasonic welding. The terminal disclosed herein is a terminal constituting any of positive and negative electrodes of a secondary battery and includes a plate-like metallic first member and a metallic second member which is ultrasonically welded to one plate surface of the first member. A recessed portion is formed on a surface on an opposite side to the surface, to which the second member is welded, of the first member, and ultrasonic welding between the first member and the second member is realized in the recessed portion.

Abstract: The secondary battery includes: a square battery case; and a wound electrode body accommodated in the battery case. The wound electrode body has a positive electrode sheet and a negative electrode sheet overlapping with each other to be wound about a winding axis to have a rectangular shape when seen from a winding axis direction. The wound electrode body has corner parts positioned at four corners of the wound electrode body when seen from the winding axis direction. The positive electrode sheet has a positive electrode collector and a positive electrode active material layer. The negative electrode sheet has a negative electrode collector and a negative electrode active material layer. Folding grooves are formed along the winding axis direction at portions of the positive electrode active material layer or portions of the negative electrode active material layer that are positioned at the corner parts.

Abstract: A terminal including two members excellent in junction strength and conduction is provided. The terminal herein disclosed is a terminal forming any of a positive electrode and a negative electrode of a secondary battery, and has a first member and a second member each made of a metal. The first member is formed in a sheet shape, and the second member has a crimped part opposed to the first member. Herein, at one surface of the first member, the crimped part of the second member is crimped with the first member not via a through hole, and the opposing surfaces of the first member and the second member have the metal junction surfaces metal-joined to each other.

Abstract: Provided is an electrode sheet manufacturing apparatus that forms an electrode sheet by cutting a sheet stack including an electrode composite material layer and a separator provided on the electrode composite material layer. The electrode sheet manufacturing apparatus includes a laser irradiation device that irradiates the sheet stack with a first laser beam having a wavelength to be absorbed by the separator and a second laser beam having a wavelength to be absorbed by the electrode composite material layer, and a controller that controls driving of the laser irradiation device. The controller moves an irradiation position of the first laser beam relative to the sheet stack and moves an irradiation position of the second laser beam so as to follow a track of the irradiation position of the first laser beam.

Abstract: A tissue piece treating apparatus including a storage container in which a tissue piece is operable to be housed, and a treating tank in which the storage container is housed, the storage container includes a plurality of through holes, the treating tank is disposed to a main body part by being inclined relative to a horizontal direction, and the storage container is housed by being inclined at the same angle as the treating tank.

Abstract: A secondary battery includes an electrode body, a battery case, and an electrode terminal. The electrode body has a foil collecting portion. The electrode terminal corresponding to at least one of a positive electrode and a negative electrode is electrically connected to the foil collecting portion via a current collector terminal. The current collector terminal is joined to the foil collecting portion. The foil collecting portion has a joining mark composed of a plurality of recesses on a surface on an opposite side of the foil collecting portion from a surface joined to the current collector terminal. The joining mark has two corners on an inner side of the electrode body and two corners on an outer side of the electrode body, and only the two corners on the inner side of the electrode body have a chamfered shape.

Abstract: A protruding portion of a current collecting foil is provided at one end in a width direction over an entire length in a longitudinal direction. A first end of a positive electrode plate, which is located on a side on which the protruding portion is provided, is located outward of a second end in the width direction, the second end being an end of a positive electrode active material layer in the width direction located adjacent to the protruding portion. An insulating tape is interposed between a positive electrode plate and the negative electrode plate. Regarding a size and a position of the insulating tape, the insulating tape is provided in a region including the second end and the first end in the width direction, and the insulating tape is provided in a region including longitudinal ends of the positive electrode plate in the longitudinal direction.

Abstract: A battery manufacturing method includes: winding positive and negative electrode plates and a separator to form a wound electrode assembly; cutting unwound portions of the positive and negative electrode plates and the separator such that the separator constitutes an outermost layer of the wound electrode assembly when the winding is completed; further winding around the wound electrode assembly the cut unwound portions; fixing a part of a terminal end of the separator in a lateral direction to the wound electrode assembly; and performing heat welding on parts of both lateral ends of an outermost portion of the separator in the wound electrode assembly, which are located above an electrode active material-uncoated portion of the positive or negative electrode plate to fix the lateral ends to the wound electrode assembly.