Abstract: An energy storage system is described that is capable of efficiently performing charging with respect to a power supply in which a cycle of supplied power fluctuates. The energy storage system is connected to a power supply in which a cycle of supplied power fluctuates. The energy storage system includes a first storage battery and a second storage battery having an internal resistance lower than an internal resistance of the first storage battery at a same voltage and a same capacity. The first storage battery and the second storage battery are connected in parallel.

Abstract: A lead-acid battery management system and a lead-acid battery management program are described that appropriately manage bipolar lead-acid batteries to reduce a degree to which the lead-acid batteries impose a load on environment as much as possible and are necessary to cause a circulation cycle from manufacturing to reuse to reliably function. A lead-acid battery system includes multiple bipolar lead-acid batteries and a management and support apparatus configured to manage the lead-acid battery system. The management and support apparatus includes a recording unit configured to record operation history information of the bipolar lead-acid batteries and a state determination unit configured to determine necessity of replacement of respective ones of the bipolar lead-acid batteries.

Abstract: A chargeable battery state detection apparatus configured to detect a state of a chargeable battery is provided, comprising processor(s) and memorie(s) communicatively connected to the processor(s), wherein the processor(s) read out a group of instructions stored in the memorie(s), and execute a detection process for detecting a voltage and a current of the chargeable battery; a storage process for storing voltage values detected at different times by the detection process after charge and discharge is stopped; a fitting process for fitting, with respect to the voltage values, by adjusting coefficients of a predetermined function; a calculation process for calculating an open circuit voltage based on the function; and a discard process for discarding at least a part of the voltage values stored by the storage process when a current value or a voltage value detected by the detection process fluctuates by a predetermined threshold value or greater.

Abstract: A secondary battery deterioration estimation device includes a memory; and a processor which executes the following processes based on executable programs stored in the memory, generating history information showing history of a use state of the secondary battery with reference to a signal output from a current sensor detecting a current flowing through the secondary battery; calculating values of elements forming an equivalent circuit of the secondary battery; calculating a state of health (SOH) of the secondary battery based on the values of the elements forming the equivalent circuit; correcting the values of the elements before the SOH is calculated or the value of the SOH obtained by the calculation based on the history information; and outputting data representing the SOH of the secondary battery.

Abstract: A secondary battery deterioration estimation device includes receiving a first signal representing a discharging voltage; receiving a second signal representing a discharging current from a current sensor; calculating values of elements forming an equivalent circuit of the secondary battery based on the first and second signals; calculating a state of health (SOH) of the secondary battery based on the values of the elements forming the equivalent circuit; generating history information showing history of a use state of the secondary battery; calculating the SOH of the secondary battery based on the history information; determining a deterioration state of the secondary battery with reference to at least one of the SOH calculated by the values of the elements or the SOH calculated by the history information by the processor in accordance with a state of the secondary battery; and outputting data representing the deterioration state of the secondary battery.

Abstract: A secondary battery state detection device for detecting the state of a secondary battery includes at least one processor and at least one memory that is communicably connected to the at least one processor. The at least one processor reads a set of instructions stored in the at least one memory, and executes detection processing in which a charging voltage is detected, the charging voltage being generated when an alternator that generates an adjustable voltage charges the secondary battery; computation processing in which a charging resistance is computed as an internal resistance of the secondary battery when the alternator charges the secondary battery; and estimation processing in which a state of charge of the secondary battery is estimated on the basis of the charging voltage detected by the detection processing and on the charging resistance computed by the computation processing.

Abstract: Problem: To accurately detect the state of charge of a secondary battery regardless of the state of the same. Resolution Means: A secondary battery state detection device 1 for detecting the state of a secondary battery 14 has a measurement unit (voltage sensor 11) for measuring or estimating the open-circuit voltage of the secondary battery, a determination unit (control unit 10) for determining a state of charge by applying the open-circuit voltage measured or estimated by the measurement unit to a correlation equation expressing the relationship between the open-circuit voltage and state of charge, a calculation unit (control unit 10) for calculating a state of charge on the basis of the internal resistance of the secondary battery, and a correction unit (control unit 10) for correcting the correlation equation of the determination unit if the values of the state of charge determined by the determination unit and the state of charge calculated by the calculation unit differ.

Abstract: [Object] To detect states of a plurality of secondary batteries whose kinds are different with high accuracy.

Abstract: Described herein are techniques to accurately detect that a secondary battery has been replaced. A secondary battery state detecting device detects a state of a secondary battery installed in a vehicle. The device includes a control unit that learns element values of an equivalent circuit of the secondary battery on the basis of a voltage and a current of the secondary battery. The control unit also compares the element values obtained through learning at different timings and, when at least one of the element values has changed more than or equal to a predetermined threshold value, determines that the secondary battery has been replaced.

Abstract: To provide a secondary battery state detecting device that decreases the deterioration in capacity of the secondary battery and is low in arithmetic cost. A secondary battery state detecting device that detects a state of a secondary battery includes discharge means (discharge circuit (15)) for subjecting the secondary battery (14) to a pulse discharge, acquiring means (controller (10)) for controlling the discharge means to subject the secondary battery to at least one pulse discharge, and acquiring a time variation of a voltage value at that time, calculating means (controller (10)) for calculating a parameter of a predetermined function having time as a variable by fitting the variation of the voltage value acquired by the acquiring means using the predetermined function, and detecting means (controller (10)) for detecting the state of the secondary battery on the basis of the parameter of the predetermined function calculated by the calculating means.

Abstract: A secondary battery internal temperature estimation device that estimates a secondary battery's internal temperature regardless of the secondary battery's type or state of degradation, the device including: a control unit that estimates the secondary battery's internal temperature on the basis of a relational equation showing a relationship between an external temperature and the secondary battery's internal temperature. A control unit calculates element values of an equivalent circuit of the secondary battery, determines a coefficient of the relational equation on the basis of the element values of the equivalent circuit calculated by the control unit, and applies the coefficient obtained by the control unit to the relational equation. The control unit estimates the secondary battery's internal temperature on the basis of the relational equation to which the coefficient has been applied by the control unit.

Abstract: [Object] To accurately detect states of a variety of types of secondary batteries even in a low-current range.

Abstract: A secondary battery state detection device for detecting the state of a secondary battery includes at least one processor and at least one memory that is communicably connected to the at least one processor. The at least one processor reads a set of instructions stored in the at least one memory, and executes detection processing in which a charging voltage is detected, the charging voltage being generated when an alternator that generates an adjustable voltage charges the secondary battery; computation processing in which a charging resistance is computed as an internal resistance of the secondary battery when the alternator charges the secondary battery; and estimation processing in which a state of charge of the secondary battery is estimated on the basis of the charging voltage detected by the detection processing and on the charging resistance computed by the computation processing.

Abstract: A state detecting method and device of a secondary battery correct impact resulting from state quantities caused by variation and calculate a state of charge with high accuracy. The state detecting method includes a first step of acquiring a detected voltage value and a detected current value, a second step of acquiring state quantities caused by variation such as a detected temperature value, a third step of determining if the detected voltage value is the voltage threshold value or greater, a fourth step of determining if the detected current value is the current threshold value or less, a fifth step of determining if a duration time of the current threshold value or less has elapsed a determination time, a sixth step of setting a state of charge in a reference state as the state of charge, and a seventh step of correcting the state of charge in the reference state.

Abstract: A secondary battery deterioration estimation device estimating deterioration of the secondary battery, includes a memory; and a processor which executes the following processes based on executable programs stored in the memory, receiving a first signal representing a discharging voltage from a voltage sensor; receiving a second signal representing a discharging current from a current sensor; calculating values of elements forming an equivalent circuit of the secondary battery based on the first and second signals; calculating a state of health (SOH) of the secondary battery based on the values of the elements forming the equivalent circuit; generating history information showing history of a use state of the secondary battery; calculating the SOH of the secondary battery based on the history information; determining a deterioration state of the secondary battery with reference to at least one of the SOH calculated by the values of the elements or the SOH calculated by the history information by the processor

Abstract: A secondary battery deterioration estimation device includes a memory; and a processor which executes the following processes based on executable programs stored in the memory, generating history information showing history of a use state of the secondary battery with reference to a signal output from a current sensor detecting a current flowing through the secondary battery; calculating values of elements forming an equivalent circuit of the secondary battery; calculating a state of health (SOH) of the secondary battery based on the values of the elements forming the equivalent circuit; correcting the values of the elements before the SOH is calculated or the value of the SOH obtained by the calculation based on the history information; and outputting data representing the SOH of the secondary battery.

Abstract: Problem: To accurately detect the state of charge of a secondary battery regardless of the state of the same. Resolution Means: A secondary battery state detection device 1 for detecting the state of a secondary battery 14 has a measurement unit (voltage sensor 11) for measuring or estimating the open-circuit voltage of the secondary battery, a determination unit (control unit 10) for determining a state of charge by applying the open-circuit voltage measured or estimated by the measurement unit to a correlation equation expressing the relationship between the open-circuit voltage and state of charge, a calculation unit (control unit 10) for calculating a state of charge on the basis of the internal resistance of the secondary battery, and a correction unit (control unit 10) for correcting the correlation equation of the determination unit if the values of the state of charge determined by the determination unit and the state of charge calculated by the calculation unit differ.

Abstract: A secondary battery state detecting device (1) that detects a state of a secondary battery (14) installed in a vehicle, the device including: a learning means (control unit (10)) that learns element values of an equivalent circuit of the secondary battery (14) on the basis of a voltage and a current of the secondary battery (14); and a determination means (control unit (10)) that compares the element values obtained through learning at different timings by the learning means and, when at least one of the element values has changed more than or equal to a predetermined threshold value, determines that the secondary battery (14) has been replaced.

Abstract: Problem To estimate an accurate internal temperature of a secondary battery, regardless of the type and state of degradation of the secondary battery.

Abstract: [Object] To accurately detect states of a variety of types of secondary batteries even in a low-current range.