Abstract: A power storage device includes a positive electrode and a negative electrode facing each other, a separator disposed between the positive electrode and the negative electrode, the separator being porous, and a sealing member made of a resin and sealing a space between the positive electrode and the negative electrode. The separator includes a material having a melting temperature higher than a melting temperature of a resin material of the sealing member. The separator has an edge portion sandwiched and held in the sealing member in a state where the edge portion is joined to a melted-then-solidified portion of the resin material of the sealing member.

Abstract: A power storage apparatus including a battery and a control circuit that controls the charging or discharging of the battery, wherein during a polarization elimination time period extending from the charging/discharging end time of the battery to a polarization-eliminated time at which polarization of the battery can be judged to have been eliminated, the control circuit obtains, as an amount of change, the difference between a voltage measured at a first time set according to the temperature of the battery and a voltage measured at a second time following the first time and set according to the temperature of the battery, and sums the product of the amount of change and an estimation coefficient and the voltage measured at the first or second time so as to estimate an open-circuit voltage of the battery to be provided after elimination of the polarization of the battery.

Abstract: Provided is a power storage apparatus including a battery and a control circuit that controls charging and discharging of the battery, wherein during a polarization elimination time period, the control circuit obtains, as an amount of change, a difference between a first voltage of the battery measured at a first time and a second voltage of the battery measured at a second time following the first time, multiplies the amount of change by an estimation coefficient that depends on the first voltage, the second voltage, a temperature of the battery, a temperature of a space around the battery, or a degree of deterioration of the battery, and sums the value obtained so as to estimate an open-circuit voltage to be provided after elimination of the polarization of the battery.

Abstract: A battery state-of-charge estimation apparatus includes: a storage that stores a charge SOC-OCV curve, a discharge SOC-OCV curve, and internal-division-ratio information; and a state-of-charge estimation unit, wherein: when a capacity difference between a battery before and after charging when the battery is charged when an intersection point is on the discharge SOC-OCV curve or when a capacity difference between the battery before and after discharging when the battery is discharged when an intersection point is on the charge SOC-OCV curve is less than a threshold, the state-of-charge estimation unit references the internal-division-ratio information to determine an internal division ratio; and the state-of-charge estimation unit estimates the state of charge of the battery using the determined internal division ratio, the open-circuit voltage of the battery after elapse of a predetermined time period since the end of charging or discharging, the charge SOC-OCV curve, and the discharge SOC-OCV curve.

Abstract: A battery state-of-charge estimation apparatus includes: a storage that stores a charge SOC-OCV curve, a discharge SOC-OCV curve, and internal-division-ratio information; and a state-of-charge estimation unit, wherein: when a capacity difference between a battery before and after charging when the battery is charged when an intersection point is on the discharge SOC-OCV curve or when a capacity difference between the battery before and after discharging when the battery is discharged when an intersection point is on the charge SOC-OCV curve is less than a threshold, the state-of-charge estimation unit references the internal-division-ratio information to determine an internal division ratio; and the state-of-charge estimation unit estimates the state of charge of the battery using the determined internal division ratio, the open-circuit voltage of the battery after elapse of a predetermined time period since the end of charging or discharging, the charge SOC-OCV curve, and the discharge SOC-OCV curve.

Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said hinder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.

Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.

Abstract: Provided is a power storage apparatus including a battery and a control circuit that controls charging and discharging of the battery, wherein during a polarization elimination time period, the control circuit obtains, as an amount of change, a difference between a first voltage of the battery measured at a first time and a second voltage of the battery measured at a second time following the first time, multiplies the amount of change by an estimation coefficient that depends on the first voltage, the second voltage, a temperature of the battery, a temperature of a space around the battery, or a degree of deterioration of the battery, and sums the value obtained so as to estimate an open-circuit voltage to be provided after elimination of the polarization of the battery.

Abstract: A power storage apparatus including a battery and a control circuit that controls the charging or discharging of the battery, wherein during a polarization elimination time period extending from the charging/discharging end time of the battery to a polarization-eliminated time at which polarization of the battery can be judged to have been eliminated, the control circuit obtains, as an amount of change, the difference between a voltage measured at a first time set according to the temperature of the battery and a voltage measured at a second time following the first time and set according to the temperature of the battery, and sums the product of the amount of change and an estimation coefficient and the voltage measured at the first or second time so as to estimate an open-circuit voltage of the battery to be provided after elimination of the polarization of the battery.

Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.

Abstract: A control apparatus controlling discharge of a secondary battery such that a discharge power of the secondary battery does not exceed an upper limit value has a current sensor and a controller. The current sensor detects a current value during charge and discharge of the secondary battery. The controller calculates an evaluation value for determining a first deterioration component depending on nonuniformity of an ion concentration in an electrolyte of the secondary battery by using the detection result of the current sensor, and reduces the upper limit value when the integral value of the evaluation values exceeding a target value exceeds a threshold value. The controller estimates a second deterioration component depending on the material of the secondary battery and changes the threshold value such that deterioration due to the first deterioration component is permitted in association with the second deterioration component.

Abstract: A control apparatus controlling discharge of a secondary battery such that a discharge power of the secondary battery does not exceed an upper limit value has a current sensor and a controller. The current sensor detects a current value during charge and discharge of the secondary battery. The controller calculates an evaluation value for determining a first deterioration component depending on nonuniformity of an ion concentration in an electrolyte of the secondary battery by using the detection result of the current sensor, and reduces the upper limit value when the integral value of the evaluation values exceeding a target value exceeds a threshold value. The controller estimates a second deterioration component depending on the material of the secondary battery and changes the threshold value such that deterioration due to the first deterioration component is permitted in association with the second deterioration component.

Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.