Abstract: There is provided a secondary battery where the occurrence of adverse effects due to folds of a continuously folded separator is reduced. A secondary battery includes a plurality of sheet-like positive electrodes, a plurality of sheet-like negative electrodes, and a belt-like separator placed between the positive electrodes and the negative electrodes. The positive electrodes and the negative electrodes are alternately stacked with the separator interposed therebetween. The separator is continuously folded to be interposed between the positive electrodes and the negative electrodes. Folds of the continuously folded separator are at least a specified distance away from ends of the negative electrodes.

Abstract: There is provided a secondary battery where the occurrence of adverse effects due to folds of a continuously folded separator is reduced. A secondary battery (1) includes a plurality of sheet-like positive electrodes (100), a plurality of sheet-like negative electrodes (200), and a belt-like separator (300) placed between the positive electrodes (100) and the negative electrodes (200). The positive electrodes (100) and the negative electrodes (200) are alternately stacked with the separator (300) interposed therebetween. The separator (300) is continuously folded to be interposed between the positive electrodes (100) and the negative electrodes (200). Folds of the continuously folded separator (300) are at least a specified distance away from ends of the negative electrodes (200).

Abstract: A non-aqueous electrolyte secondary battery includes a negative electrode in which a negative electrode active material layer is formed on a negative electrode collector, and a positive electrode laminated on the negative electrode through a separator, in which a positive electrode active material layer is formed on a positive electrode collector. The positive electrode active material layer on a surface of a positive electrode tab drawn from the positive electrode collector has a region which extends in a drawing direction of the positive electrode tab, exceeding a leading end line of a vertically projected negative electrode active material layer opposed to the positive electrode active material layer and in which an existing amount of the positive electrode active material layer is reduced toward its leading end portion.

Abstract: A non-aqueous electrolyte secondary battery includes a negative electrode in which a negative electrode active material layer is formed on a negative electrode collector, and a positive electrode laminated on the negative electrode through a separator, in which a positive electrode active material layer is formed on a positive electrode collector. The positive electrode active material layer on a surface of a positive electrode tab drawn from the positive electrode collector has a region which extends in a drawing direction of the positive electrode tab, exceeding a leading end line of a vertically projected negative electrode active material layer opposed to the positive electrode active material layer and in which an existing amount of the positive electrode active material layer is reduced toward its leading end portion.

Abstract: There is provided a lithium ion secondary battery exhibiting a high capacity retention rate over a long period.

Abstract: A method for production of a stacked battery having a step of determining in advance a simultaneously bondable number of electrode current collection tabs and a step of forming groups of current collection tabs, and a step of displacing the bonding positions of the groups of positive electrode current collection tabs or those of negative electrode current collection tabs relative to each other in the direction of drawing out the positive electrode current collection tabs or the negative electrode current collection tabs, or in the direction perpendicular to the direction and collectively bonding the positive electrode current collection tabs or the negative electrode current collection tabs, of each group under the bonding conditions.

Abstract: A sealed battery with a film casing, comprising: a film casing covering a battery element; an electrode terminal pulled out by being conductive-connected to a positive electrode and a negative electrode of the battery element is taken out from a sealing part of the film casing; and a part of the electrode terminal between a portion positioned at the sealing part of the electrode terminal and a part of a portion of the electrode terminal extending outward beyond the sealing part being covered by an insulating resin layer, a region with low strength against bending being formed at the insulating resin layer positioned at a part extending outward beyond the sealing part or a part of the electrode terminal positioned at a lower layer of the insulating resin layer positioned at a part extending outward beyond the sealing part.

Abstract: There is provided a lithium ion secondary battery exhibiting a high capacity retention rate over a long period.

Abstract: In a stacked secondary battery, positive electrodes 5 and negative electrodes 4, which are formed by integrally forming a positive electrode collector tab 57 and a negative electrode collector tab 47 on a metal foil positive electrode collector 51 and a metal foil negative electrode collector 41, respectively, are stacked together with separators 6 disposed in-between. The separator 6 is also disposed between the opposing parts 8 of the positive electrode collector tab and the negative electrode collector tab. A positive electrode lead 17 and a negative electrode lead 15, connected to the positive electrode collector tab and the negative electrode collector tab, respectively, extend out from the same end surface of the stack of the positive electrodes 5 and the negative electrodes 4 and are drawn out from an outer casing 3.

Abstract: A stacked battery module or a battery pack is formed by laying a plurality of unit batteries of non-aqueous electrolyte batteries in layers with the surfaces thereof having a large area disposed vis-à-vis and electrically connecting them in series and a temperature fuse is arranged in the central part of the stacked battery module with one of its terminals connected to either the positive electrode terminal or the negative electrode terminal of the stacked battery module while the other terminal connected to a charging terminal for supplying a charging current in a charging operation. One of the terminals of the stacked battery module is connected to a discharging terminal for taking out a discharging current in a discharging operation and the other terminal of the stacked battery module is a common terminal for charging and discharging operations.

Abstract: A stacked secondary battery having desirable characteristics against overcharging is provided. In the stacked secondary battery, either of a planar positive electrode or a planar negative electrode is contained in a pouch-shaped separator oriented such that the direction in which a positive lead terminal or a negative lead terminal is drawn out is aligned with a machine direction of the separator; a synthetic resin film is applied to the pouch-shaped separator across an edge of a joint area on both sides of the separator, the synthetic resin film having an adhesion strength higher than the stress caused by thermal contraction of the separator and having a softening point higher than that of the separator; and the positive electrode or the negative electrode that is contained in the pouch-shaped separator is stacked with a counter electrode that is not contained in the separator in an opposed manner to form a stacked battery element, which in turn is sealed in a film-like casing.

Abstract: A method for production of a stacked battery having a plurality of positive electrode current collection tabs and a plurality of negative electrode current collection tabs drawn out from a stacked member formed by laying positive electrodes and negative electrodes alternately one on the other with separators interposed between them and bonded respectively to a positive lead terminal and a negative lead terminal comprises a step of determining in advance a simultaneously bondable number, or the number of positive electrode current collection tabs and the number of negative electrode current collection tabs that can be laid one on the other and collectively bonded, and bonding conditions for bonding them and a step of forming groups of current collection tabs, each group being formed by laying a number of current collection tabs not exceeding the simultaneously bondable number one on the other, displacing the bonding positions of the groups of positive electrode current collection tabs or those of negative elec

Abstract: A sealed battery with a film casing, comprising: a film casing covering a battery element; an electrode terminal pulled out by being conductive-connected to a positive electrode and a negative electrode of the battery element is taken out from a sealing part of the film casing; and a part of the electrode terminal between a portion positioned at the sealing part of the electrode terminal and a part of a portion of the electrode terminal extending outward beyond the sealing part being covered by an insulating resin layer, a region with low strength against bending being formed at the insulating resin layer positioned at a part extending outward beyond the sealing part or a part of the electrode terminal positioned at a lower layer of the insulating resin layer positioned at a part extending outward beyond the sealing part.

Abstract: A stacked battery module or a battery pack is formed by laying a plurality of unit batteries of non-aqueous electrolyte batteries in layers with the surfaces thereof having a large area disposed vis-à-vis and electrically connecting them in series and a temperature fuse is arranged in the central part of the stacked battery module with one of its terminals connected to either the positive electrode terminal or the negative electrode terminal of the stacked battery module while the other terminal connected to a charging terminal for supplying a charging current in a charging operation. One of the terminals of the stacked battery module is connected to a discharging terminal for taking out a discharging current in a discharging operation and the other terminal of the stacked battery module is a common terminal for charging and discharging operations.

Abstract: A piezoelectric transformer includes strip form electrodes on opposing upper and lower surfaces of a piezoelectric ceramic plate formed by screen printing using a conductive paste. By using strip form electrodes, discharge of a driving portion during polarization, degradation of reliability of mechanical strength due to excessive stress in a power generating portion during polarization, and instability of transformer output due to breakage of the electrode is prevented.

Abstract: In a piezoelectric transformer unit which transforms an input voltage into an output voltage and which includes a piezoelectric transformer element driven by high electric power, a package is provided to accommodate the piezoelectric transformer element therein. Electrodes are attached to nodes of the piezoelectric transformer element and supported by each pair of input and output conductive leads which are operable as leaf springs and which are extended through the package. Contact portions of the conductive leads may provide point contacts, area contacts, and/or line contacts.

Abstract: A piezoelectric vibrator comprises a piezoelectric element having a rectangular shape and being provided with at least one input electrode from which an input lead extends and at least one output electrode from which an output lead extends; and a case having a rectangle-like shape for accommodating the piezoelectric element and having at least through holes through which the input and output leads penetrate thereby the leads project to an exterior of the case. The through holes have a size larger than a size of the leads to create a clearance between the leads and inner walls of the through holes so as to allow the leads to show a displacement or a vibration due to the vibration of the piezoelectric element.