Battery classification apparatus and method

A battery classification apparatus, comprising:

• a processor;
• and
• memory having programmed thereon instructions that, when executed, are configured to cause the processor to:
• measure a voltage of a battery and measure a resistance corresponding to the voltage of the battery;
• obtain battery information about the measured voltage and the measured resistance of the battery generate a resistance profile representing a corresponding relationship between the voltage and the resistance based on the battery information;
• determine a criterion resistance based on a resistance value in the resistance profile;
• determine a reference resistance corresponding to a highest voltage in the resistance profile;
• classify a type of the battery into a high nickel-based battery or a low nickel-based battery based on the criterion resistance and the reference resistance, wherein the high nickel-based battery or the low nickel-based battery is determined according to a content of nickel contained in the battery;
• determine a target voltage in a target voltage region between a voltage corresponding to the criterion resistance and a voltage corresponding to the reference resistance;
• set the determined target voltage as a charging upper limit for the battery;
• and
• control the voltage of the battery to charge up to the charging upper limit for the battery to prevent a degradation of the battery.