| CPC H02J 7/00712 (2020.01) [G01R 31/388 (2019.01); G01R 31/389 (2019.01); H01M 10/44 (2013.01); H01M 10/48 (2013.01); H02J 7/0047 (2013.01); B60L 53/62 (2019.02); H01M 2220/20 (2013.01)] | 13 Claims |
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1. A charging control apparatus comprising:
a voltage sensor configured to detect a voltage of a battery cell; and
a controller configured to execute an intermittent charging process to alternately repeat a charging mode and a resting mode for the battery cell,
wherein, under a condition that switching from the charging mode to the resting mode is performed while the intermittent charging process is being executed, the controller is configured to execute:
an operation of determining an internal resistance of the battery cell based on an amount of change in voltage of the battery cell in a resting period, wherein the resting period is from a first time point at which the charging mode transitions to the resting mode until a second time point at which the resting mode transitions back to the charging mode;
an operation of recording the internal resistance in association with a State of Charge (SOC) of the battery cell; and
an operation of determining a depth of charge (DOC) of the battery cell by analyzing a resistance time series data set representing a history of change in the internal resistance over a charging control period from initiation to termination of the intermittent charging process, wherein the DOC indicates a maximum SOC to which the battery cell can be charged without occurrence of lithium plating.
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