Abstract: Described are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover (CT) value during operation in consideration of at least one of an upper limit state of charge (SOC) or an upper limit voltage. A CT value calculation unit calculates the CT value during operation using at least one of an upper-limit-SOC-based correction coefficient (KHSOC) calculated based on the upper limit SOC, which is an SOC having the largest value when the lead-acid battery is charged, or an upper-limit-voltage-based correction coefficient (KHV) calculated based on the upper limit voltage, which is the highest voltage when the lead-acid battery is charged.

Abstract: Described are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover value during operation in consideration of the number of equalization charges of the lead-acid battery or an overcharge rate integrated value of the equalization charge of the lead-acid battery. The lead-acid battery system estimates the remaining life of the lead-acid battery by comparing a capacity turnover value from the beginning of life to the end of life with the capacity turnover value during operation. A capacity turnover value calculation unit in the lead-acid battery system calculates the capacity turnover value during operation by using an equalization-charge-number-based correction coefficient KCN calculated based on the number of equalization charges or a charge-rate-based correction coefficient KCP calculated based on the overcharge rate integrated value of the equalization charge.

Abstract: Described are a lead-acid battery system and life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover (CT) value during operation in consideration of at least one of a lower limit state of charge (SOC) or a low SOC dwell time. A capacity turnover value calculation unit calculates the CT value using at least one of a lower-limit-SOC-based correction coefficient KLSOC calculated based on a lower limit SOC, which is an SOC having the smallest value when the lead-acid battery is charged and discharged once, respectively, or a low-SOC-dwell-time-based correction coefficient Kt_LSOC calculated based on a low SOC dwell time tLSOC, which is an elapsed time until the next discharge or charge starts when a discharge ends below a reference SOC.

Abstract: Described are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover value during operation in consideration of a magnitude of a depth of discharge (DOD). The lead-acid battery system estimates the remaining life by comparing a capacity turnover value from the beginning to the end of life with the capacity turnover value during operation. The lead-acid battery system includes a capacity turnover value calculation unit that calculates the capacity turnover value during operation. The capacity turnover value calculation unit calculates the capacity turnover value during operation using a DOD-based correction coefficient calculated based on the DOD, which is calculated by dividing an integrated discharge capacity after the start of the discharge of the lead-acid battery by a rated capacity of the lead-acid battery.

Abstract: Described are a lead-acid battery system and life estimation method that can improve reliability by more accurately estimating degradation of a lead-acid battery regardless of its cause. A transition determination unit determines switching of charging/discharging process of the battery, and a current value determination unit detects a change in a discharge current value during a discharge period, When a change is detected, a calculation unit calculates a capacitance turn-over (CT) value on the basis of a discharge current value acquired for each section divided by the change, and a degradation determination unit determines a degradation degree of the battery using the CT value.

Abstract: Described are a lead-acid battery system and life estimation method that can contribute to improvement of reliability by more accurately estimating a degradation degree of a, e.g., lead-acid) storage battery regardless of a degradation cause. A transition determination unit determines switching of a charging/discharging process of a battery. A calculation unit calculates a CT value on the basis of a discharge current value during a discharge period of the battery, and a degradation determination unit determines a degradation degree of the battery using the CT value calculated by the calculation unit.

Abstract: The present invention provides an optical layered body that has multiple laminated layers of which the refractive indexes are greatly different. The optical layered body can suitably prevent interfacial reflection and interference fringes attributed to the reflection in the interfaces between the layers. The optical layered body has a light-transmitting substrate, and at least an optical functional layer (1) on one surface of the substrate, wherein the refractive index of the optical functional layer (1) in the thickness direction continuously increases from the surface on the light-transmitting substrate side to the surface opposite to the light-transmitting substrate side to show a sigmoid curve.

Abstract: The present invention provides an optical layered body that has multiple laminated layers of which the refractive indexes are greatly different. The optical layered body can suitably prevent interfacial reflection and interference fringes attributed to the reflection in the interfaces between the layers. The optical layered body has a light-transmitting substrate, and at least an optical functional layer (1) on one surface of the substrate, wherein the refractive index of the optical functional layer (1) in the thickness direction continuously increases from the surface on the light-transmitting substrate side to the surface opposite to the light-transmitting substrate side to show a sigmoid curve.

Abstract: There are provided a resin composition, which has optical properties such as a high refractive index, has excellent restorability and scratch resistance, and has good adhesion to a substrate, and, when utilized as an optical member (lens) used, for example, in screens for projection televisions or the like, can satisfy various property requirements, and a cured product of the resin composition. The resin composition comprises: an epoxy (meth)acrylate oligomer having an average molecular weight of not more than 1500, a copolymer of a (meth)acrylic ester with styrene or ?-methylstyrene, a thermoplastic urethane elastomer, a (meth)acrylic ester monomer, and a photopolymerization initiator.

Abstract: There are provided a resin composition, which has optical properties such as a high refractive index, has excellent restorability and scratch resistance, and has good adhesion to a substrate, and, when utilized as an optical member (lens) used, for example, in screens for projection televisions or the like, can satisfy various property requirements, and a cured product of the resin composition. The resin composition comprises: an oligomer component comprising urethane (meth)acrylate, produced by reacting a bisphenol A polyalkoxydiol, an organic diisocyanate and a hydroxyl-containing mono(meth)acrylate, and a bisphenol A epoxy (meth) acrylate; a monomer component comprising a phenoxy polyethylene glycol (meth)acrylate and a bisphenol A polyethoxydiol di(meth)acrylate; and a photopolymerization initiator. The resin composition has a refractive index of not less than 1.55 after resin curing.

Abstract: There are provided a resin composition, which has optical properties such as a high refractive index, has excellent restorability and scratch resistance, and has good adhesion to a substrate, and, when utilized as an optical member (lens) used, for example, in screens for projection televisions or the like, can satisfy various property requirements, and a cured product of the resin composition. The resin composition comprises: an epoxy (meth)acrylate oligomer having an average molecular weight of not more than 1500, a copolymer of a (meth)acrylic ester with styrene or ?-methylstyrene, a thermoplastic urethane elastomer, a (meth)acrylic ester monomer, and a photopolymerization initiator.