Patent ID: 11913996
Assignee: GS YUASA INTERNATIONAL LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 10:
11. An estimation method comprising the steps of:
deriving a derivation history based on a current, a voltage of a lead-acid battery and a temperature of the lead-acid battery acquired at a point of time of an estimation;
specifying at least one physical quantity out of a first physical quantity of an amount of a positive active material, a second physical quantity of a specific surface area of a positive electrode material, a third physical quantity of bulk density of the positive electrode material, a fourth physical quantity of positive active material particles in a cluster size, a fifth physical quantity of a cumulative amount of lead sulfate of a negative electrode material, a sixth physical quantity of a specific surface area of the negative electrode material, a seventh physical quantity of a corrosion amount of a positive electrode grid, an eighth physical quantity of resistivity of a positive electrode plate, and a ninth physical quantity of resistivity of a negative electrode plate, based on the derived derivation history and at least one relationship selected from a group consisting of:
a first relationship between a first history based on a preliminary obtained the current, a preliminary obtained voltage of the lead-acid battery or a different lead-acid battery and a preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the first physical quantity;
a second relationship between a second history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the second physical quantity;
a third relationship between a third history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the third physical quantity;
a fourth relationship between a fourth history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the fourth physical quantity;
a fifth relationship between a fifth history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the fifth physical quantity;
a sixth relationship between a sixth history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the sixth physical quantity;
a seventh relationship between a seventh history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the seventh physical quantity;
an eighth relationship between an eighth history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the eighth physical quantity, and
a ninth relationship between a ninth history based on the preliminary obtained current, the preliminary obtained voltage of the lead-acid battery or the different lead-acid battery and the preliminary obtained temperature of the lead-acid battery or the different lead-acid battery and the ninth physical quantity, and
estimating a degree of deterioration of the lead-acid battery based on the at least one specified physical quantity.