Patent ID: 11894710
Assignee: MAKITA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. A battery pack, comprising:
a first cell configured to be charged with a charging current supplied from a charger;
a memory device configured to store a maximum variation of a charging current value, the charging current value corresponding to a magnitude of the charging current, the maximum variation being determined depending on a characteristic of the battery pack;
a target current calculator configured to calculate a newest value of a target current value based on (i) a previous value of the target current value and (ii) the maximum variation, the target current value corresponding to the magnitude of the charging current required to charge the first cell;
an information notifier configured to transmit charge condition information to the charger, the charge condition information including the newest value; and
a charging current comparator configured to determine whether a provisional current value is smaller than or equal to a reference current value, the provisional current value corresponding to a sum of the previous value and the maximum variation, the reference current value corresponding to an upper limit of the charging current value permissible in the first cell,
wherein the target current calculator is configured to calculate the newest value by adding the maximum variation to the previous value, in response to the charging current comparator determining that the provisional current value is smaller than or equal to the reference current value, and
wherein the target current calculator is configured to set the reference current value as the newest value, in response to the charging current comparator determining that the provisional current value is larger than the reference current value.