Abstract: A reconstructing method of a battery pack is a reconstructing method of a battery pack including a plurality of laminated cells each having a seal part.

Abstract: A secondary battery restoring method includes a first step of determining whether or not a value of an input-output characteristic of a secondary battery or a battery module is within a predetermined range of reference values, and a second step of adjusting the secondary battery or the battery module to a predetermined low SOC condition of from 0% to 20% SOC and thereafter leaving the secondary battery or the battery module to stand if, in the first step, the value of the input-output characteristic is determined to be outside the predetermined range of reference values.

Abstract: The non-aqueous electrolyte secondary battery 10 according to the present invention is provided with an electrode body 50 including a positive electrode 64 that contains a positive electrode active material and a negative electrode 84 that contains a negative electrode active material, a non-aqueous electrolyte, and a battery case 15 that houses the electrode body and the non-aqueous electrolyte. The non-aqueous electrolyte contains a complex, which contains copper (I) chloride as a constituent component and which is capable of adsorbing at least carbon monoxide and carbon dioxide, and a coating film that contains at least one of phosphorus and boron is formed on the surface of the negative electrode active material.

Abstract: Provided is a method by which the sorting as to whether a spent nonaqueous electrolyte secondary battery with the degraded input/output characteristics can be reused can be realized more accurately by taking into consideration the degradation of the input/output characteristics which is caused by the salt concentration unevenness and liquid shortage in the electrode body.

Abstract: Provided is a method that makes it possible to determine more accurately whether or not a spent nonaqueous electrolyte secondary battery is reusable. The method for sorting a reusable nonaqueous electrolyte secondary battery, which is disclosed herein, includes: a step of preparing a spent nonaqueous electrolyte secondary battery having an electrode body in which a positive electrode and a negative electrode are laminated; a step of vibrating the prepared nonaqueous electrolyte secondary battery in a direction perpendicular to the lamination direction of the positive electrode and the negative electrode; a step of acquiring a value of an internal resistance of the nonaqueous electrolyte secondary battery subjected to vibrations; and a step of determining whether or not the nonaqueous electrolyte secondary battery is reusable by comparing the acquired value of the internal resistance with a predetermined threshold of the internal resistance.

Abstract: A secondary battery restoring method includes a first step of determining whether or not a value of an input-output characteristic of a secondary battery or a battery module is within a predetermined range of reference values, and a second step of adjusting the secondary battery or the battery module to a predetermined low SOC condition of from 0% to 20% SOC and thereafter leaving the secondary battery or the battery module to stand if, in the first step, the value of the input-output characteristic is determined to be outside the predetermined range of reference values.

Abstract: An evaluation value is calculated based on a history of currents in order to quantitatively evaluate unevenness of an ion concentration in a non-aqueous electrolyte of a secondary battery. An integrated evaluation value for each of the discharging side and the charging side are calculated. When the integrated evaluation value exceeds a positive threshold value, discharging of the secondary battery is restricted, and when the integrated evaluation value exceeds a negative threshold value, charging of the secondary battery is restricted.

Abstract: An evaluation value is calculated based on a history of currents in order to quantitatively evaluate unevenness of an ion concentration in a non-aqueous electrolyte of a secondary battery. An integrated evaluation value for each of the discharging side and the charging side are calculated. When the integrated evaluation value exceeds a positive threshold value, discharging of the secondary battery is restricted, and when the integrated evaluation value exceeds a negative threshold value, charging of the secondary battery is restricted.

Abstract: A method of manufacturing a lithium-ion secondary battery proposed herein includes the following steps of: preparing a battery in which an electrode assembly is enclosed in a battery case; filling a first electrolyte solution containing a film forming agent into the battery case; charging and discharging the battery filled with the first electrolyte solution; discharging the first electrolyte solution from the battery that has been charged and discharged; and filling a second electrolyte solution containing a film forming agent at a concentration of less than 0.005 mol/L into the battery case from which the first electrolyte solution has been discharged.

Abstract: Provided is a method by which the sorting as to whether a spent nonaqueous electrolyte secondary battery with the degraded input/output characteristics can be reused can be realized more accurately by taking into consideration the degradation of the input/output characteristics which is caused by the salt concentration unevenness and liquid shortage in the electrode body.

Abstract: Provided is a method that makes it possible to determine more accurately whether or not a spent nonaqueous electrolyte secondary battery is reusable. The method for sorting a reusable nonaqueous electrolyte secondary battery, which is disclosed herein, includes: a step of preparing a spent nonaqueous electrolyte secondary battery having an electrode body in which a positive electrode and a negative electrode are laminated; a step of vibrating the prepared nonaqueous electrolyte secondary battery in a direction perpendicular to the lamination direction of the positive electrode and the negative electrode; a step of acquiring a value of an internal resistance of the nonaqueous electrolyte secondary battery subjected to vibrations; and a step of determining whether or not the nonaqueous electrolyte secondary battery is reusable by comparing the acquired value of the internal resistance with a predetermined threshold of the internal resistance.

Abstract: The present invention provides a sealed lithium secondary battery in which redox shuttle reactions of an aromatic compound that is an overcharge inhibitor are inhibited, and the aromatic compound decomposes appropriately, and a desired amount of gas can be generated more stably than in conventional instances, even in high-temperature environments. In the sealed lithium secondary battery (100), an electrode assembly (80) and an electrolyte are accommodated in a battery case (50) that is provided with a current interrupt device (30). The electrolyte comprises a compound that is capable of suppressing drops in viscosity of the electrolyte as a result of a rise in temperature in a temperature region up to 100° C., and an aromatic compound capable of generating hydrogen gas when a predetermined battery voltage is exceeded.

Abstract: The present invention provides a method for producing a nonaqueous electrolyte secondary battery in which the drop in capacity retention rate is controlled by forming a coating in a more favorable state on the surface of the negative electrode active material.

Abstract: The non-aqueous electrolyte secondary battery 10 according to the present invention is provided with an electrode body 50 including a positive electrode 64 that contains a positive electrode active material and a negative electrode 84 that contains a negative electrode active material, a non-aqueous electrolyte, and a battery case 15 that houses the electrode body and the non-aqueous electrolyte. The non-aqueous electrolyte contains a complex, which contains copper (I) chloride as a constituent component and which is capable of adsorbing at least carbon monoxide and carbon dioxide, and a coating film that contains at least one of phosphorus and boron is formed on the surface of the negative electrode active material.

Abstract: The present invention provides a method of manufacturing a nonaqueous electrolyte secondary battery in which graphite fissuring during rolling of the negative electrode mixture layer is prevented and a deterioration in the performance of the battery is thereby suppressed.

Abstract: A main object of the present invention to provide a nonaqueous electrolyte secondary battery having high durability towards charge and discharge cycles, by preventing buckling of a wound electrode body. The secondary battery provided by the present invention comprises: a nonaqueous electrolyte; and a wound electrode body 80 configured by superposing on each other, and winding a positive electrode sheet 10 having a positive electrode collector formed to a sheet shape and a positive electrode active material layer formed on that collector, a, negative electrode sheet 20 having a negative electrode collector formed to a sheet shape and a negative electrode active material layer formed on that collector, and a separator 40 formed to a sheet shape. The negative electrode active material contained in the negative electrode active material layer is oriented in a predetermined direction.

Abstract: A method of manufacturing a lithium-ion secondary battery proposed herein includes the following steps of: preparing a battery in which an electrode assembly is enclosed in a battery case; filling a first electrolyte solution containing a film forming agent into the battery case; charging and discharging the battery filled with the first electrolyte solution; discharging the first electrolyte solution from the battery that has been charged and discharged; and filling a second electrolyte solution containing a film forming agent at a concentration of less than 0.005 mol/L into the battery case from which the first electrolyte solution has been discharged.

Abstract: The present invention provides a sealed lithium secondary battery in which redox shuttle reactions of an aromatic compound that is an overcharge inhibitor are inhibited, and the aromatic compound decomposes appropriately, and a desired amount of gas can be generated more stably than in conventional instances, even in high-temperature environments. In the sealed lithium secondary battery (100), an electrode assembly (80) and an electrolyte are accommodated in a battery case (50) that is provided with a current interrupt device (30). The electrolyte comprises a compound that is capable of suppressing drops in viscosity of the electrolyte as a result of a rise in temperature in a temperature region up to 100° C., and an aromatic compound capable of generating hydrogen gas when a predetermined battery voltage is exceeded.

Abstract: The present invention provides a method for producing a nonaqueous electrolyte secondary battery in which the drop in capacity retention rate is controlled by forming a coating in a more favorable state on the surface of the negative electrode active material.

Abstract: The present invention provides a method of manufacturing a nonaqueous electrolyte secondary battery in which graphite fissuring during rolling of the negative electrode mixture layer is prevented and a deterioration in the performance of the battery is thereby suppressed.