Abstract: A lithium secondary battery includes a battery case, an internal electrode body contained in the battery case and including a positive electrode, a negative electrode and a separator made of porous polymer, the positive electrode and the negative electrode are wound or laminated. A working volume ratio of the positive active material and the negative active material obtained by the positive active material weight being divided by the negative active material weight is within the range from 40% to 90% of the theoretical working volume ratio. The lithium secondary battery has high safety as well as high energy density by controlling the working volume of an electrode active material and the dispersion of the distribution of the working volume and in particular is preferably used for a drive motor of an electric vehicle.

Abstract: A method of transporting a lithium secondary battery includes transporting the battery including an electrode body obtained by winding or laminating a positive electrode and a negative electrode via a separator, and a non-aqueous electrolyte solution in a state where: E/Cp+T3<t . . . (1) where E (J/g) is energy quantity per unit weight of said battery; Cp (J/° C.·g) is the specific heat of said battery; T3 (° C.) is a normal transportation temperature of said battery; and t (° C.) is the lowest temperature at which said battery falls into an unsafe state.

Abstract: To provide a lithium secondary battery with a high critical discharge current even under a low temperature condition, with an excellent cycle characteristic and reduced manufacturing cost. This lithium secondary battery includes a wound type electrode body comprising a positive electrode plate, and a negative electrode plate both of which have been wound around a core via a separator; said electrode body being impregnated with a non-aqueous electrolyte, and a cylindrical case for housing the electrode body and the non-aqueous electrolyte; the case having at least one opening at either end thereof; said at least one opening being sealed. The separator is subjected to drying treatment before assembly.

Abstract: A miniature microphone component comprises a miniature condenser microphone, conductive rubber contacts formed and fixed on a terminal area of the miniature microphone and a rubber casting (also called “bushing”) for protection against vibrations covering the circumference of the miniature microphone. To install the miniature microphone component, it is sufficient to insert the miniature microphone component into a small-size communication device so that the conductive rubber contacts formed and fixed on the terminal area of the miniature microphone are pressed against terminal portions on a circuit board. Thus, the working efficiency of the assembly can be considerably increased and the installation space can be minimized.

Abstract: A lithium secondary battery includes a battery case, an internal electrode body contained in the battery case and including a positive electrode, a negative electrode and a separator made of porous polymer, the positive electrode and the negative electrode are wound or laminated. A working volume ratio of the positive active material and the negative active material obtained by the positive active material weight being divided by the negative active material weight is within the range from 40% to 90% of the theoretical working volume ratio. the lithium secondary battery has high safety as well as high energy density by controlling the working volume of an electrode active material and the dispersion of the distribution of the working volume and in particular is preferably used for a drive motor of an electric vehicle.

Abstract: There is provided a method of evaluating an electrode body impregnated with a non-aqueous electrolyte, comprising a positive electrode and a negative electrode wound or laminated with a separator inserted in between. The discharge limit of the electrode body is evaluated by means of affinity of the non-aqueous electrolyte for the separator. This method is capable of selecting an optimal combination between a separator and non-aqueous electrolyte and evaluating a discharge limit of the electrode body before finally manufacturing a lithium secondary cell.

Abstract: A lithium secondary battery contains an electrode body obtained by winding a positive electrode and a negative electrode via a separator, a non-aqueous electrolytic solution, and a battery case accommodating the electrode body and the non-aqueous electrolytic solution. A lid and a metal foil are adhered to each other with a resin to form a pressure-releasing valve and make air-tight the inside of the battery case. This secondary battery is easy to produce and has excellent operational safety and excellent reliability.

Abstract: A lithium secondary battery including an internal electrode body contained in a battery case including a positive electrode, a negative electrode and a separator made of porous polymer, the positive electrode and the negative electrode are wound or laminated. A working volume ratio of the positive active material and the negative active material obtained by the positive active material weight being divided by the negative active material weight is within the range from 40% to 90% of the theoretical working volume ratio. The lithium secondary battery has high safety as well as high energy density by controlling the working volume of an electrode active material and the dispersion of the distribution of the working volume and in particular is preferably used for a drive motor of an electric vehicle.

Abstract: Alithium secondary battery for use in electric vehicle, includes: a battery case, and an electricity-generating body including a positive electrode, a negative electrode, and a separator, the positive and the negative electrode being wound or laminated via the separator so that the positive electrode and negative electrode are not brought into direct contact with each other. Each single battery has a ratio (X/E) of battery output X (W) and battery energy E (Wh), of 2 to 36 or a product (R×E) of battery internal resistance R (m&OHgr;) and battery energy E (Wh), of 50 to 900 (m&OHgr;·Wh). The lithium secondary battery is used in an electric vehicle as combined batteries formed by connecting a required number of the single batteries in series.

Abstract: A lithium secondary battery for use in electric vehicle, includes: a battery case, and an electricity-generating body including a positive electrode, a negative electrode, and a separator, the positive and the negative electrode being wound or laminated via the separator so that the positive electrode and negative electrode are not brought into direct contact with each other. Each single battery has a ratio (X/E) of battery output X (W) and battery energy E (Wh), of 2 to 36 or a product (R×E) of battery internal resistance R (m&OHgr;) and battery energy E (Wh), of 50 to 900 (m&OHgr;·Wh). The lithium secondary battery is used in an electric vehicle as combined batteries formed by connecting a required number of the single batteries in series.

Abstract: A lithium secondary battery contains an electrode body obtained by winding a positive electrode and a negative electrode via a separator, a non-aqueous electrolytic solution, and a battery case accommodating the electrode body and the non-aqueous electrolytic solution. A lid and a metal foil are adhered to each other with a resin to form a pressure-releasing valve and make air-tight the inside of the battery case. This secondary battery is easy to produce and has excellent operational safety and excellent reliability.

Abstract: A lithium secondary battery has small internal resistance and has good charge-discharge cycle characteristics, with a lithium transition metal compound being used as a positive active material. A portion of transition element Me in a lithium transition metal compound LiMexOy to be used as a positive active material is substituted by not less than two kinds selected from the group consisting of Li, Fe, Mn, Ni, Mg, Zn, B, Al, Co, Cr, Si, Ti, Sn, P, V, Sb, Nb, Ta, Mo, and W. Here, M represents substitution elements, and M≢Me.

Abstract: The present invention provides a lithium secondary cell including an inner electrode body impregnated with a non-aqueous electrolyte, made up of a positive electrode and a negative electrode wound or laminated together with a separator inserted in between, an cell case that contains the inner electrode body and an electrode cover that seals the inner electrode body provided with cell covers, external terminals and internal terminals. The lithium secondary cell is provided with a unit for cooling the electric current path. The lithium secondary cell is capable of preventing a lowering of performance and extending the service life by preventing heating of the lithium secondary cell and maintaining temperature within an adequate range.

Abstract: A lithium secondary battery includes a positive electrode active material which is composed mainly of Li and Mn and has a cubic spinel structure, the primary particles of the positive electrode active material having a substantially octahedral shape constituted mainly by flat crystal faces. In this lithium secondary battery, the morphology of the particles constituting the positive electrode active material is controlled; thereby, the resistance of the positive electrode active material and accordingly the internal resistance of the battery are lowered; as a result, discharge in large current has been made possible.

Abstract: Provided are a method for filling an electrolyte solution and a battery structure of a lithium secondary battery comprising an internal electrode body formed by winding a positive electrode, and a negative electrode, with sandwiching a separator therebetween around the outer periphery of a core, and an electrolyte solution to impregnate said internal electrode body; said method being excellent in the productivity, and battery performance as well, and being characterized by an easy filling of an electrode solution, with minimization of excessive electrode solution in the battery, by virtue of the provision of an electrolyte solution injection opening in a specific position, through which the electrolyte solution is injected and extracting efficiently by using a nozzle for injection and/or extraction of electrolyte solution.

Abstract: Provided are a method for filling an electrolyte solution and a battery structure of a lithium secondary battery comprising an internal electrode body formed by winding a positive electrode, and a negative electrode, with sandwiching a separator therebetween around the outer periphery of a core, and an electrolyte solution to impregnate said internal electrode body; said method being excellent in the productivity, and battery performance as well, and being characterized by an easy filling of an electrode solution, with minimization of excessive electrode solution in the battery, by virtue of the provision of an electrolyte solution injection opening in a specific position, through which the electrolyte solution is injected and extracting efficiently by using a nozzle for injection and/or extraction of electrolyte solution.

Abstract: A lithium secondary battery includes a battery case, and an internal electrode body contained in the battery case and including a positive electrode and a negative electrode wound through a separator film made of porous polymer, and uses a nonaqueous organic electrolyte. Opposing pressure release mechanisms are disposed at both ends of the battery case in the winding direction of the positive electrode and the negative electrode. The lithium secondary battery is simple in fabrication, has small internal resistance, and is superior in safety.

Abstract: A lithium secondary battery includes an internal electrode body including a positive electrode, a negative electrode, a separator, the positive electrode and the negative electrode being wound via the separator so that the positive electrode and the negative electrode are not brought into direct contact with each other, an organic electrolyte, and a battery case containing the internal electrode body. A pipe is used as the battery case. The lithium secondary battery is excellent in reliability and can be produced at low processing costs.

Abstract: A lithium secondary battery uses an organic electrolyte solution and includes a battery case, an internal electrode body contained in a battery case and including a positive electrode, a negative electrode and a separator made of porous polymer. The positive electrode and the negative electrode are wound or laminated so that the positive electrode and negative electrode are not brought into direct contact with each other via the separator. A zeolite having a moisture absorption characteristic, has been incorporated in the battery case so that the zeolite is brought into contact with the organic electrolyte solution within the battery case. The lithium secondary battery achieves suppression of deterioration of a charge-discharge cycle characteristic of a battery caused by decomposition of an electrolyte by limiting moisture mixed into an organic electrolyte solution to a considerably lower level as well as improvement of its self-discharge characteristic.

Abstract: Provided are a method for filling an electrolyte solution and a battery structure of a lithium secondary battery comprising an internal electrode body formed by winding a positive electrode, and a negative electrode, with a separator sandwiched therebetween around the outer periphery of a core, and an electrolyte solution to impregnate said internal electrode body; said method being excellent in productivity, and battery performance as well, and being characterized by an easy filling of an electrode solution, with minimization of excessive electrode solution in the battery, by virtue of the provision of an electrolyte solution injection opening in a specific position, through which the electrolyte solution is injected and extracting efficiently by using a nozzle for injection and/or extraction of electrolyte solution.