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.

An estimation device includes: a derivation unit (31) configured to derive a derivation history based on a current, a voltage of a lead-acid battery and a temperature of the lead-acid battery; a specifying unit (31) configured to specify one or more physical quantities based on the derivation history, and one or more relationships selected from a first relationship between a first history and an amount of positive active material, a second relationship between a second history and a specific surface area of a positive electrode material, a third relationship between a third history and bulk density of the positive active material, a fourth relationship between a fourth history and positive active material particles in a cluster size, a fifth relationship between a fifth history and a cumulative amount of lead sulfate of a negative electrode material, a sixth relationship between a sixth history and a specific surface area of the negative electrode material, a seventh relationship between a seventh history and a corrosion amount of a positive electrode grid, an eighth relationship between an eighth history and resistivity of a positive electrode plate, and a ninth relationship between a ninth history and resistivity of a negative electrode plate; and an estimation unit (31) configured to estimate a degree of deterioration of the lead-acid battery.

The present invention provides a classification method and system for rechargeable batteries based on stable charging current or current leakage. A charging current should be zero theoretically when a rechargeable battery is fully charged, however, due to self-discharging effect, there exists a current leakage even after the battery is fully charged. Rechargeable batteries can be classified based on their stable charging current after being fully charged. Different classified rechargeable batteries can be adopted for different purposes.

The present invention provides a classification method and system for rechargeable batteries based on stable charging current or current leakage. A charging current should be zero theoretically when a rechargeable battery is fully charged, however, due to self-discharging effect, there exists a current leakage even after the battery is fully charged. Rechargeable batteries can be classified based on their stable charging current after being fully charged. Different classified rechargeable batteries can be adopted for different purposes.

An estimation device includes: a deriving unit (31) that derives a derivation history based on a current and a voltage of a lead-acid battery and a temperature of the lead-acid battery; a specifying unit 31 that specifies at least two degrees 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 negative electrode sulfation, and a fourth degree of shrinkage of a negative electrode material based on the derived derivation history and at least two relationships selected from the group consisting of: a first relationship between a first history based on the current, the voltage, and the temperature of the lead-acid battery, and the first degree; a second relationship between a second history and the second degree; a third relationship between a third history and the third degree; and a fourth relationship between a fourth history and the fourth degree; and an estimating unit (31) that estimates a degree of deterioration of the lead-acid battery based on the specified at least two degrees.

A lead storage battery management system is disclosed. The lead storage battery management system according to an embodiment, comprises: a lead storage battery regeneration device for generating a pulse wave current to remove oxide films generated on electrodes of a lead storage battery; a measuring device for measuring information on the state of the lead storage battery; a control unit for controlling operations of the lead storage battery regeneration device and the measuring device; and an adjusting device interlocked with the control unit to receive, as an input, an operation value from a user, to thus improve the operation efficiency of the lead storage battery regeneration device, and to easily gain access to information stored in a database and operation state information of the lead storage battery regeneration device to easily control the operation of the lead storage battery regeneration device and the measuring device.

A lead storage battery management system is disclosed. The lead storage battery management system according to an embodiment, comprises: a lead storage battery regeneration device for generating a pulse wave current to remove oxide films generated on electrodes of a lead storage battery; a measuring device for measuring information on the state of the lead storage battery; a control unit for controlling operations of the lead storage battery regeneration device and the measuring device; and an adjusting device interlocked with the control unit to receive, as an input, an operation value from a user, to thus improve the operation efficiency of the lead storage battery regeneration device, and to easily gain access to information stored in a database and operation state information of the lead storage battery regeneration device to easily control the operation of the lead storage battery regeneration device and the measuring device.

An online detection apparatus for a storage battery is provided. The storage battery is connected in parallel with a power supply in a working circuit of an electric device, and the storage battery is a standby power supply of the power supply. The apparatus includes a control unit comprising circuitry configured to send a boost enable instruction when detecting a detection trigger event of the storage battery; a discharge circuit connected in series with the storage battery and electrically coupled to the control unit, wherein the discharge circuit is configured to receive the boost enable instruction from the control unit and to control a voltage of the storage battery to be increased to greater than or equal to a voltage of the power supply according to the boost enable instruction to enable the storage battery to enter a discharge state; and a battery monitoring unit comprising circuitry electrically coupled to the control unit and configured to detect discharge performance of the storage battery when the storage battery enters the discharge state.

An online detection apparatus for a storage battery is provided. The storage battery is connected in parallel with a power supply in a working circuit of an electric device, and the storage battery is a standby power supply of the power supply. The apparatus includes a control unit comprising circuitry configured to send a boost enable instruction when detecting a detection trigger event of the storage battery; a discharge circuit connected in series with the storage battery and electrically coupled to the control unit, wherein the discharge circuit is configured to receive the boost enable instruction from the control unit and to control a voltage of the storage battery to be increased to greater than or equal to a voltage of the power supply according to the boost enable instruction to enable the storage battery to enter a discharge state; and a battery monitoring unit comprising circuitry electrically coupled to the control unit and configured to detect discharge performance of the storage battery when the storage battery enters the discharge state.

A method for estimating a state of charge of a valve regulated lead-acid battery includes; an overcharge amount identification step of identifying an overcharge amount when the lead-acid battery is overcharged after an arbitrary reference time; an open circuit voltage acquisition step of acquiring an open circuit voltage of the lead-acid battery after the reference time; and a state-of-charge estimation step of estimating a state of charge of the lead-acid battery based on the acquired open circuit voltage and a correlation between an open circuit voltage and state of charge in which a rate of change of the state of charge with respect to the open circuit voltage is smaller as the overcharge amount from the reference time until an acquisition time of the open circuit voltage is larger.