Abstract: The present invention provides a sealed battery, in which leakage can be detected in reliable manner, a method for manufacturing the sealed battery, and a method for detecting leakage of the sealed battery. The invention provides a sealed battery containing helium, a method for manufacturing the sealed battery, and a method for detecting leakage. From inside a battery case sealed except an electrolyte inlet, the air is withdrawn, and pressure is applied by a gas containing helium under pressure higher than the atmospheric pressure through the electrolyte inlet. The electrolyte is injected, and after the electrolyte and the gas containing helium have been injected, the electrolyte inlet is sealed.

Abstract: The present invention provides a closed type battery that is free from any sealing defects due to a sag of caulking with time, etc. The closed type battery is constructed of a monolithic electrode terminal that comprises an insulating member for covering the inner surface of a through-hole formed through a metal sheet for sealing up an opening of a battery can and both surfaces of the metal sheet around the through-hole, and an electrode-drawing sheet having a synthetic resin layer formed on one surface thereof, which sheet is located on the surface of the insulating member positioned on the outer surface of the battery while the synthetic resin layer comes in contact therewith, wherein the electrode-drawing sheet and the insulating member are integrated together by means of an electrode-leading pin passed through a through-hole in the electrode-drawing sheet.

Abstract: The invention provides a multi-series connection type battery cell pack, characterized by comprising a plurality of series-connected battery cells 1, a charge/discharge control switch 2 for performing charge/discharge control, a plurality of protective circuits 3-1 and 3-2 for dividing the plurality of battery cells 1 into a plurality of blocks to detect at least the voltage of each battery cell, a computing circuit 5 for performing computation of pack detection signals and a level conversion circuit 4 for unifying voltages references of the detection signals between the plurality of protective circuits 3-1 and 3-2 and the computing circuit 5, wherein the plurality of protective circuits 3-1 and 3-2 are joined in parallel with the battery cells 1 in a multistage fashion. It is thus possible to unify the voltage references while computation and communication are executed irrespective of control.

Abstract: The invention provides a battery pack 2 operatively associated with a main system 1 for charge-level data sharing between them for recording and management. The battery pack 2 includes recorder means 22 that is connected to the main system 1 for writing to and reading out of the main system 1. Charge-level data measured (12, 14) and calculated (13) at at least the main system 1 are written to and read out of the recorder means 22 by way of signal lines. The battery pack 2 is not provided with any means for management of the charge-level data, making cost and size reductions possible.

Abstract: The present invention provides a conductive connecting structure exhibiting satisfactory connecting performance to connect a conductive connecting tab being mounted on a battery element to a battery case, said conductive connecting table of the battery is connected to inner wall surface of the battery case or to inner surface of the battery housing, said conductive connecting tab with a plurality of bumps for projection welding is positioned face-to-face to inner wall surface of the battery case or to inner surface of the battery housing, and projection welding is performed to connect the tab.

Abstract: The present invention provides a battery, in which swelling or expansion of side surface of a battery case when the battery is charged is reduced. The invention provides a sealed battery, accommodating a battery element of flat shape, said battery element comprising a positive electrode and a negative electrode being laminated on each other with a separator interposed between them and being wound together, characterized in that a recessed portion is formed on a side surface of a battery case running in parallel to a flat surface of the battery element, said recessed portion having a central axis running in parallel to said flat surface and being positioned on a surface passing through the center of the battery case and running perpendicularly to the surface in parallel to the flat surface of the battery element.

Abstract: The invention provides a multi-series connection type battery cell pack, characterized by comprising a plurality of series-connected battery cells 1, a charge/discharge control switch 2 for performing charge/discharge control, a plurality of protective circuits 3-1 and 3-2 for dividing the plurality of battery cells 1 into a plurality of blocks to detect at least the voltage of each battery cell, a computing circuit 5 for performing computation of pack detection signals and a level conversion circuit 4 for unifying voltages references of the detection signals between the plurality of protective circuits 3-1 and 3-2 and the computing circuit 5, wherein the plurality of protective circuits 3-1 and 3-2 are joined in parallel with the battery cells 1 in a multistage fashion. It is thus possible to unify the voltage references while computation and communication are executed irrespective of control.

Abstract: The present invention provides a sealed battery, in which leakage can be detected in reliable manner, a method for manufacturing the sealed battery, and a method for detecting leakage of the sealed battery. The invention provides a sealed battery containing helium, a method for manufacturing the sealed battery, and a method for detecting leakage. From inside a battery case sealed except an electrolyte inlet, the air is withdrawn, and pressure is applied by a gas containing helium under pressure higher than the atmospheric pressure through the electrolyte inlet. The electrolyte is injected, and after the electrolyte and the gas containing helium have been injected, the electrolyte inlet is sealed.

Abstract: The invention provides a closed type battery comprising an electrode terminal formed by caulking a metal material mounted on a battery can via an insulating member with a different metal, wherein changes in contact resistance with years are reduced. In the electrode terminal, an electrode-drawing sheet mounted on the battery header through an insulating member is caulked integrally with an electrode-leading pin formed of a metal different from a metal forming the electrode-drawing sheet. A joint is provided by laser welding on at least one site on a surface portion of contact of the electrode-drawing sheet with the electrode-leading pin.

Abstract: The present invention provides a sealed battery, in which leakage can be detected in reliable manner, a method for manufacturing the sealed battery, and a method for detecting leakage of the sealed battery. The invention provides a sealed battery containing helium, a method for manufacturing the sealed battery, and a method for detecting leakage. From inside a battery case sealed except an electrolyte inlet, the air is withdrawn, and pressure is applied by a gas containing helium under pressure higher than the atmospheric pressure through the electrolyte inlet. The electrolyte is injected, and after the electrolyte and the gas containing helium have been injected, the electrolyte inlet is sealed.

Abstract: The invention provides a closed type battery wherein there is no need of joining a tab joined to a battery element and an external circuit connection lead to an electrode terminal provided on a battery can via an insulating member. After the battery element is received in the battery can, a tab joined to the battery element is inserted through a tab sleeve formed integrally with a metal sheet of the battery header. In this state, the battery header is attached over an opening in the battery can, and the junction of the battery header and the battery can is sealed up by laser welding. Finally, an insulating member is inserted over the inside surface of the sleeve, which is then caulked.

Abstract: The invention provides a closed type battery comprising an electrode-leading terminal formed by caulking that ensures satisfactory sealing sealability. That terminal comprising a metal plate for sealing up an opening in a battery can, an insulating member that cover a through-hole provided through the metal plate and both surfaces of the metal plate around the through-hole, an electrode-drawing sheet positioned on a surface of the insulating member located on an outer surface of a battery and an electrode-leading pin that is inserted into the through-hole in the electrode-drawing sheet and caulked from above and below. At the surface of contact of a flange of the electrode-leading pin with the insulating member there is provided at least a projection.

Abstract: The present invention provides a closed type battery that is free from any sealing defects due to a sag of caulking with time, etc. The closed type battery is constructed of a monolithic electrode terminal that comprises an insulating member for covering the inner surface of a through-hole formed through a metal sheet for sealing up an opening of a battery can and both surfaces of the metal sheet around the through-hole, and an electrode-drawing sheet having a synthetic resin layer formed on one surface thereof, which sheet is located on the surface of the insulating member positioned on the outer surface of the battery while the synthetic resin layer comes in contact therewith, wherein the electrode-drawing sheet and the insulating member are integrated together by means of an electrode-leading pin passed through a through-hole in the electrode-drawing sheet.

Abstract: In a film packed battery, a battery power source comprising, at least, a cathode, an anode, an electrolyte, and a separator is packed with a film. In a method for producing film packed battery, a pre-charging step for charging the film packed battery while pressure is applied, for example, by sandwiching it between two flat plates is included at least once.

Abstract: The invention provides a battery pack comprising a battery using a battery can, wherein the operation of a pressure relief valve is not adversely affected by an insulating protective member. The insulating protective member is attached on the surface of the battery can provided with the pressure relief valve, having at least one aperture located above the pressure relief valve and in communication with the periphery of said pressure relief valve.

Abstract: The invention provides a battery pack that comprises a battery covered with a flexible outer member and is not susceptible to damage even upon receipt of external impacts. In the battery pack, a built-in part including at least a protective circuit board is provided thereon with a cushioning member that is deformable by compression and restorable into shape after decompression. The cushioning member is attached to the surface of the battery by means of a thermally shrinkable tube or an adhesive tape applied on the side of a battery can.

Abstract: The present invention provides a mutual connection judging circuit for judging mutual connection between a device 3 with an incorporated battery 4 and a charger 1, wherein there are provided transistors Q1 and Q2 on the charger 1 side and the device 3 side respectively, bases of the transistors Q1 and Q2 on the charger 1 side and the device 3 side are connected with each other, and mutual connection is judged by collector potential of the transistors Q1 and Q2. The charger 1 controls the charging by judging mutual connection depending upon whether the collector of the PNP transistor Q1 is in opened state or not. The device 3 comprises a circuit Q3 for controlling emitter potential of the NPN transistor Q2, controls emitter potential depending upon whether the charging is in enable state or not, and turns on or off the NPN transistor Q2, and the charger 1 starts the charging by judging collector potential of the PNP transistor Q1.