Patent ID: 11916230
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A method of producing an alkaline storage battery, comprising:
preparing a hydrogen storage alloy;
producing a negative electrode active material by heating the hydrogen storage alloy in an NaOH aqueous solution having a concentration of 44 mass % at a temperature of 105° C. or higher and 110° C. or less for an hour, and
preparing a negative electrode with the negative electrode active material,
wherein the hydrogen storage alloy has a chemical composition represented by the following
Formula (II): A2B7 (II)
where A includes La and Mg; and B includes Ni,
wherein the hydrogen storage alloy includes cobalt and 55 mass % or more and 65 mass % or less of nickel,
wherein a saturation magnetization per unit mass of the negative electrode active material is 5.3 emu·g−1 to 5.8 emu·g−1, and
wherein a direct current internal resistance of the alkaline storage battery is less than 40 with respect to a direct current internal resistance of a second alkaline storage battery including a negative electrode active material having a saturation magnetization per unit mass is 0.1 emu g−1 when a state of charge (SOC) of the first and second alkaline storage batteries is 50%.