Abstract: In some embodiments, a lithium secondary battery is provied. The battery can include a laminate in which positive electrodes and negative electrodes are laminated in a lamination direction. A separator can be interposed between the positive electrode and the negative electrode. A first current collector can be present, the first current collector comprising a pair of conductive layers and a resin layer. The pair of conductive layers can sandwich the resin layer. The first current collector including a first end part. A first electrode tab electrically connected to the first end part can be present. A sealed container can be present including a sealing part. The sealed container can be configured to sandwich the first insulating part of the first electrode tab at the sealing part and to allow a part of the first electrode tab to be taken out to an outside of the sealed container.

Abstract: In one exemplary embodiment, an electrode sheet is provided. The electrode sheet has a longitudinal direction and a lateral direction and constitutes an electrode of a secondary battery by being wound with the lateral direction as an axial direction. The electrode sheet includes a current collector that includes a resin layer, and a first current collecting layer and a second current collecting layer that are respectively provided on both surfaces of the resin layer; a first active material layer that is provided on a surface of the first current collecting layer on a side opposite to the resin layer; and a first metal sheet that is bonded to one end of the first current collecting layer in the lateral direction and has a first bonding mark formed along the longitudinal direction by the bonding, where the first metal sheet has a first extending part that extends from the first current collecting layer in the lateral direction.

Abstract: There is provided a technique for suppressing a decrease in output characteristics and productivity of a lithium secondary battery. A lithium secondary battery is provided. The lithium secondary battery includes (a) a first laminate including a first end part, (b) an intermediate laminate, (c) a second laminate including a second end part, (d) a metal sheet including a first portion that overlaps with the first end part and the second end part in a case of being viewed from the lamination direction and a second portion that does not overlap with the first end part and the second end part in a case of being viewed from the lamination direction, and (e) an electrode tab that is electrically connected to the first laminate and the second laminate. The electrode tab has a first bonding mark and a second bonding mark. The first bonding mark is a bonding mark due to bonding of the electrode tab and the first end part, the first portion, and the second end part of the metal sheet.

Abstract: In one exemplary embodiment, a lithium secondary battery includes (a) a first laminate including a first end part, (b) an intermediate laminate, (c) a second laminate including a second end part, (d) a metal sheet disposed to be lined up in the lamination direction with respect to the first end part and the second end part, the metal sheet having a first bonding mark due to bonding to any one of the first end part or the second end part, and (e) an electrode tab electrically connected to the first laminate and the second laminate. The electrode tab has a second bonding mark due to bonding of the first end part, the metal sheet, and the second end part. The second bonding mark is at a position different from a position of the first bonding mark in viewing from the lamination direction.

Abstract: There is provided a technique for suppressing a decrease in output characteristics and productivity of a lithium secondary battery. The lithium secondary battery includes (a) a first laminate that includes a first end part exposed from a first electrode, (b) an intermediate laminate, (c) a second laminate that includes a second end part exposed from a second electrode, (d) a metal sheet that is disposed between the first end part and the second end part; and (e) an electrode tab that constitutes a bonding region with the first end part, the metal sheet, and the second end part and is electrically connected to the first laminate and the second laminate. The bonding region includes a first region that is configured to integrally laminate a pair of first conductive layers, a metal sheet, and a pair of second conductive layers in a cross section in a lamination direction.

Abstract: There is provided a technique for improving output characteristics of a lithium secondary battery while reducing the weight of the lithium secondary battery.

Abstract: There is provided a technique for improving an energy density and safety of a lithium secondary battery. The lithium secondary battery includes an electrode tab and a plurality of positive electrode laminates that are disposed to be spaced from each other in a lamination direction through an interposed negative electrode and separator. Each of the positive electrode laminates has a current collector that is constituted of an insulating layer sandwiched by conductive layers and that is electrically connected to the electrode tab, and a positive electrode provided on both surfaces of the current collector. At least one of the current collectors of the plurality of positive electrode laminates and at least one other current collector are joined to the electrode tab at positions different from each other in a case of being viewed from the lamination direction.

Abstract: The purpose of the present invention is to provide a secondary battery having a high energy density and excellent cycle characteristics, in which the secondary battery has a configuration making it possible to be assembled in a short time. The secondary battery of the present invention includes a laminate formed by winding a sheet having a negative electrode and separators disposed on both surfaces of the negative electrode so that the sheet is folded back a plurality of times; and a plurality of positive electrodes that are respectively disposed in each gap formed between the separators facing each other in the laminate.

Abstract: The object of the present invention is, in a power control device including an auxiliary circuit that is connected in parallel to an output circuit and controls an adjusting current smaller by a substantially constant ratio than an output current, to control the ratio of the output current to the adjusting current at a constant level by controlling the output circuit and the auxiliary circuit so that the potentials of the corresponding terminals agree with each other. As a means for attaining the object, the power control device comprises a bridge of four branches including an output circuit, an auxiliary circuit, a load, and either of a current detector or a current setting circuit.

Abstract: A plurality of successive evacuating carts for carrying respective cathode-ray tube bulbs thereon are circulatingly fed along a looped feed path into and out of an evacuating furnace. While in the evacuating furnace, the cathode-ray tube bulb carried on each of the evacuating carts is evacuated, and the evacuating pipe thereof is sealed. An evacuating pipe detecting device is disposed at a position along the feed path for detecting whether the evacuating pipe of the cathode-ray tube bulb carried on each of the evacuating units is damaged or not. If the evacuating pipe of any cathode-ray tube bulb is detected as being damaged and remains on the evacuating cart, the evacuating cart is discharged out of the feed path, and a replacement evacuating cart is charged into the feed path.