A deterioration estimation device (1) includes: a discharge control unit (11) configured to discharge a lead-acid battery (3) or a lead-acid battery module (4) that includes a plurality of lead-acid batteries until the lead-acid battery (3) or the lead-acid battery module (4) reaches a predetermined SOC; and a first estimation unit (11) configured to estimate a rate of deterioration of the lead-acid battery (3) or the lead-acid battery module (4) based on internal resistance or conductance derived when the lead-acid battery (3) or the lead-acid battery module (4) is discharged.

A deterioration estimation device (1) includes: a discharge control unit (11) configured to discharge a lead-acid battery (3) or a lead-acid battery module (4) that includes a plurality of lead-acid batteries until the lead-acid battery (3) or the lead-acid battery module (4) reaches a predetermined SOC; and a first estimation unit (11) configured to estimate a rate of deterioration of the lead-acid battery (3) or the lead-acid battery module (4) based on internal resistance or conductance derived when the lead-acid battery (3) or the lead-acid battery module (4) is discharged.

An estimation device includes: a derivation unit (31) configured to derive a derivation history based on a current and a voltage of a lead-acid battery and a temperature of the lead-acid battery; a first specifying unit 31 configured to specify a specific gravity of an electrolyte solution; a second specifying unit (31) configured to specify at least one degree out of: a first degree of softening of a positive electrode material; a second degree of corrosion of a positive electrode grid; a third degree of sulfation of a negative electrode; and a fourth degree of shrinkage of a negative electrode material based on the specified specific gravity, the derived derivation history, and at least one relationship selected from the group consisting of: a first relationship between the specific gravity and a first history, and the first degree; a second relationship between the specific gravity and a second history; and the second degree; a third relationship between the specific gravity and a third history; and the third degree; and a fourth relationship between a fourth history and the fourth degree; and an estimation unit (31) configured to estimate a degree of deterioration of the lead-acid battery based on the specified at least one degree.

An estimation device includes: a derivation unit (31) configured to derive a derivation history based on a current and a voltage of a lead-acid battery and a temperature of the lead-acid battery; a first specifying unit 31 configured to specify a specific gravity of an electrolyte solution; a second specifying unit (31) configured to specify at least one degree out of: a first degree of softening of a positive electrode material; a second degree of corrosion of a positive electrode grid; a third degree of sulfation of a negative electrode; and a fourth degree of shrinkage of a negative electrode material based on the specified specific gravity, the derived derivation history, and at least one relationship selected from the group consisting of: a first relationship between the specific gravity and a first history, and the first degree; a second relationship between the specific gravity and a second history; and the second degree; a third relationship between the specific gravity and a third history; and the third degree; and a fourth relationship between a fourth history and the fourth degree; and an estimation unit (31) configured to estimate a degree of deterioration of the lead-acid battery based on the specified at least one degree.

A battery saving system (1) for an electrically powered mobility device (13) comprising a battery (15) and a drive control system (16) configured to be powered by the battery, wherein the battery saving system (1) comprises: a current monitoring circuit (3) configured to monitor a load current provided by the battery (15), wherein the current monitoring circuit (3) is configured to determine whether a load current magnitude is below a load current threshold level, a timer circuit (7) having a counter configured to successively count as long as the load current magnitude level is below the load current threshold level, and to reset the counter in the event that the load current level magnitude exceeds the current threshold level, and a disconnecting switch (9) configured to be operated between an open state and a closed state, wherein the timer circuit (7) is configured to trigger the disconnecting switch (9) to obtain the open state when the counter has reached a predetermined number to thereby disconnect the battery (15) from the drive control system (16).

A battery saving system (1) for an electrically powered mobility device (13) comprising a battery (15) and a drive control system (16) configured to be powered by the battery, wherein the battery saving system (1) comprises: a current monitoring circuit (3) configured to monitor a load current provided by the battery (15), wherein the current monitoring circuit (3) is configured to determine whether a load current magnitude is below a load current threshold level, a timer circuit (7) having a counter configured to successively count as long as the load current magnitude level is below the load current threshold level, and to reset the counter in the event that the load current level magnitude exceeds the current threshold level, and a disconnecting switch (9) configured to be operated between an open state and a closed state, wherein the timer circuit (7) is configured to trigger the disconnecting switch (9) to obtain the open state when the counter has reached a predetermined number to thereby disconnect the battery (15) from the drive control system (16).

An estimation device includes an acquisition unit that acquires current, voltage, and temperature of a lead-acid battery, a data accumulation unit that accumulates an integrated value or a calculated value of the current, voltage, and temperature that are acquired, an identification unit that identifies specific gravity of an electrolyte solution of the lead-acid battery based on history data accumulated in the data accumulation unit, an estimation unit that estimates a freezing risk of the lead-acid battery based on identified specific gravity of an electrolyte solution, and an output unit that outputs an estimation result of the estimation unit.

A module-based framework evaluates designs of advanced start stop systems, particularly 12 V advanced start stop systems. The framework separates vehicle and battery analysis and uses a power profile to evaluate different designs of the vehicles and batteries. Particularly, the framework can evaluate different battery solutions and compare performances as a function of drive cycles, motor size, and electrical loads. In addition to modeling, actual batteries are tested for the same power inputs for validating performance differences. This framework identifies performance limiting components for determination of the vehicle system component optimization.

A module-based framework evaluates designs of advanced start stop systems, particularly 12 V advanced start stop systems. The framework separates vehicle and battery analysis and uses a power profile to evaluate different designs of the vehicles and batteries. Particularly, the framework can evaluate different battery solutions and compare performances as a function of drive cycles, motor size, and electrical loads. In addition to modeling, actual batteries are tested for the same power inputs for validating performance differences. This framework identifies performance limiting components for determination of the vehicle system component optimization.

An estimation device includes: an acquisition unit that acquires a voltage, a current, and a temperature of a lead-acid battery; a first deriving unit that derives a first SOC and a second SOC that are SOCs of a start point and an end point of an estimation period; a second deriving unit that derives a total amount of an overcharge amount in the estimation period; a third deriving unit that derives an actual measurement error based on a difference between the first SOC and the second SOC and the total amount of the overcharge amount; a first specification unit that specifies an estimation error based on the first SOC, the second SOC, and the temperature, and a relationship between the first SOC, the second SOC, and the temperature of the lead-acid battery, and the estimation error; a second specification unit that specifies an abnormality degree of the actual measurement error based on the derived actual measurement error and the specified estimation error; and an estimation unit that estimates generation of an internal short-circuit of the lead-acid battery based on the abnormality degree.