Abstract: A rechargeable battery short-circuit early detection device that detects a short-circuit in a rechargeable battery includes one or more processors connected to a current sensor that detects a charging current of the rechargeable battery, wherein the one or more processors are programmed to: if a detected temporal slope of the charging current exceeds a first threshold, determine that there is a possibility that a short circuit has occurred in at least one of the cells; detect anew a temporal slope of the charging current after a prescribed period of time has elapsed since the determination of said possibility; and thereafter, if the anew detected temporal slope of the charging current exceeds a second threshold that is greater than the first threshold, determine that there is a possibility that the short-circuit is progressing, and output a signal indicating said possibility.

Abstract: A rechargeable battery short-circuit early detection device that detects a short-circuit in a rechargeable battery includes one or more processors connected to a current sensor that detects a charging current of the rechargeable battery, wherein the one or more processors are programmed to: while the rechargeable battery is being charged, receive a current signal indicating the charging current from the current sensor; detect a temporal change in the charging current indicated by the current signal; determine, when the charging current increases over time, that there is a possibility that the rechargeable battery has short-circuited; and output data indicating a determined result.

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 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 rechargeable battery short-circuit early detection device that detects a short-circuit in a rechargeable battery includes one or more processors connected to a current sensor that detects a charging current of the rechargeable battery, wherein the one or more processors are programmed to: while the rechargeable battery is being charged, receive a current signal indicating the charging current from the current sensor; detect a temporal change in the charging current indicated by the current signal; determine, when the charging current increases over time, that there is a possibility that the rechargeable battery has short-circuited; and output data indicating a determined result.

Abstract: To accurately determine whether an engine can be started while accurately detecting a degree of deterioration of a secondary battery, in a secondary battery state detecting device detecting a state of a secondary battery mounted on a vehicle, a measurement unit measures a value of an internal resistance of the secondary battery at an engine stop time. An estimation unit estimates a value of a diffusion resistance resulting from diffusion of an ion generated at an electrolytic solution of the secondary battery by supplying electric power to a starter motor at a starting time of the engine. A calculation unit calculates a starting voltage being a voltage for the starting of the engine from a resistance value obtained by adding the value of the diffusion resistance estimated by the estimation unit to the value of the internal resistance measured by the measurement unit.

Abstract: Provided are a secondary battery degradation determination method and a secondary battery degradation determination device which can detect degradation of a secondary battery in advance even before an engine starts. When it is determined in Step S1 that a vehicle is in a stop state, a stable-state open-circuit voltage OCV is measured in Step S2 and internal resistance R1 is calculated in Steps S3 and S4. On the other hand, when it is determined in Step S1 that a starter 21 is operated, a maximum discharge current value Inew is measured in Step S5 and a maximum discharge current value Is is updated in Steps S6 and S7. In Step S14, a minimum voltage Vs is calculated. In Step S15, the stable-state open-circuit voltage OCV and the minimum voltage Vs are compared with predetermined threshold values to perform the degradation determination of a secondary battery 10.

Abstract: [Summary] [Object] To accurately detect a state of a secondary battery when the secondary battery is mounted on a vehicle.

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: To learn a parameter of a simulation model of a battery efficiently. A battery internal state estimating apparatus, estimating an internal state of a battery based on a simulation model of the battery, includes a storing section (RAM10c) that stores a plurality of parameters of the simulation model, a detecting section (I/F10d) that detects a discharge current flowing from the battery to a load, a selecting section (CPU 10a) that selects a parameter to be subjected to adaptive learning based on a value of the discharge current detected by the detecting section, and an adaptive learning section (CPU 10a) that performs adapting learning on a parameter selected by the selecting section.

Abstract: [Object] To accurately detect a state of a secondary battery when the secondary battery is mounted on a vehicle.

Abstract: The invention provides a battery condition estimating method and a power system permitting to estimate aging level or discharge ability of a battery in high precision by reducing transient changes of response voltages caused by repetitive discharges. A recovery time after a discharge is prolonged with a number of times of discharge and a relationship between the number of times of discharge and the recovery time is approximated by using an exponential function in the battery condition estimating method of the invention. A discharge pattern as shown in FIG. 1 is formed by using the recovery time obtained from this approximation and substantially constant response voltage is obtained by discharging the battery in accordance to this discharge pattern. Then, impedance during a metastable condition is calculated from the measured response voltage and the discharge current and the aging level or the discharge ability of the battery is determined from the impedance.

Abstract: Provided are a secondary battery degradation determination method and a secondary battery degradation determination device which can detect degradation of a secondary battery in advance even before an engine starts. When it is determined in Step S1 that a vehicle is in a stop state, a stable-state open-circuit voltage OCV is measured in Step S2 and internal resistance R1 is calculated in Steps S3 and S4. On the other hand, when it is determined in Step S1 that a starter 21 is operated, a maximum discharge current value Inew is measured in Step S5 and a maximum discharge current value Is is updated in Steps S6 and S7. In Step S14, a minimum voltage Vs is calculated. In Step S15, the stable-state open-circuit voltage OCV and the minimum voltage Vs are compared with predetermined threshold values to perform the degradation determination of a secondary battery 10.

Abstract: A secondary battery state detecting apparatus for detecting a state of a secondary battery installed in a vehicle is provided, which includes a current detecting unit that detects an electric current flowing to the secondary battery, a voltage detecting unit that detects a voltage of the secondary battery, and a determining unit that determines, in a case where an external device is directly connected to terminals of the secondary battery and the secondary battery is charged or discharged without passing through the current detecting unit, whether or not an irregular charging-discharging has occurred, in accordance with a change in a current value and a voltage value detected by the current detecting unit and the voltage detecting unit.

Abstract: A full charge sensing apparatus for sensing a fully charged state of a secondary battery based on an equivalent circuit model of the secondary battery includes a measuring unit that measures a voltage and a current during charging of the secondary battery, a learning unit that performs a learning process on a plurality of parameters in the equivalent circuit model using a result of measurement of the measuring unit, and a determining unit that determines that the secondary battery is in a fully charged state in a case where, among the parameters on which the learning process has been performed by the learning unit, a parameter corresponding to a reaction resistance of the secondary battery is greater than a predetermined threshold.

Abstract: A current detecting unit (current sensor 12) detecting a current value of a current flowing in a secondary battery 14; an extreme value detecting unit (CPU 10a) detecting a first extreme value of a current after an inrush current flows from the secondary battery to a starter motor after electricity to the starter motor is turned on based on the current value; an inflection point detecting unit (CPU 10a) detecting a first inflection point of the current after the inrush current flows based on a variation of the current value per a predetermined time; and a calculation unit (CPU 10a) selecting the inflection point when timings when the extreme value and the inflection point are detected are separated for a predetermined time or more, and selecting either one of the extreme value or the inflection point in the other cases to set as a starting current, and calculating a starting voltage from the starting current, an internal resistance of the secondary battery, and a voltage before starting being a voltage of the

Abstract: A start-up possibility determining apparatus that determines an engine-start-up possibility by driving a starter motor by power accumulated in a secondary battery includes a dynamic internal resistance measuring unit that measures an internal resistance of the secondary battery while the engine is being started up by the starter motor, a static internal resistance measuring unit that measures an internal resistance of the secondary battery when the engine is stopped, and a determining unit that determines an engine start-up possibility by the secondary battery, based on a value obtained by a product of a ratio between a first static internal resistance before or after the past engine start-up and a second static internal resistance within a predetermined time since a current time point and the dynamic internal resistance measured by the dynamic internal resistance measuring unit at the time of the engine start-up in the past.

Abstract: There is provided a state-of-charge estimation method, a state-of-charge estimation device, and a secondary-battery power system that may quickly and stably determine the convergence value of an adjustment parameter of a voltage characteristic formula that may approximate change over time of an open-circuit voltage of a secondary battery with high precision by appropriately setting the initial value of the adjustment parameter. At step S14, a selected voltage measurement values V1, VMbi ((i=1 to (n?1)), and VMm are used to calculate an initial value A0i (i=1 to n) of an adjustment parameter Ai (i=1 to n). In addition, at step S15, an integer string bi (i=1 to (n?1)) and a real number C are used to calculate an initial value B01 (i=1 to n) of an adjustment parameter Bi (i=1 to n).

Abstract: To accurately determine whether an engine can be started while accurately detecting a degree of deterioration of a secondary battery, in a secondary battery state detecting device detecting a state of a secondary battery mounted on a vehicle, a measurement unit measures a value of an internal resistance of the secondary battery at an engine stop time. An estimation unit estimates a value of a diffusion resistance resulting from diffusion of an ion generated at an electrolytic solution of the secondary battery by supplying electric power to a starter motor at a starting time of the engine. A calculation unit calculates a starting voltage being a voltage for the starting of the engine from a resistance value obtained by adding the value of the diffusion resistance estimated by the estimation unit to the value of the internal resistance measured by the measurement unit.

Abstract: A start-up possibility determining apparatus that determines an engine-start-up possibility by driving a starter motor by power accumulated in a secondary battery includes a dynamic internal resistance measuring unit that measures an internal resistance of the secondary battery while the engine is being started up by the starter motor, a static internal resistance measuring unit that measures an internal resistance of the secondary battery when the engine is stopped, and a determining unit that determines an engine start-up possibility by the secondary battery, based on a value obtained by a product of a ratio between a first static internal resistance before or after the past engine start-up and a second static internal resistance within a predetermined time since a current time point and the dynamic internal resistance measured by the dynamic internal resistance measuring unit at the time of the engine start-up in the past.