| CPC H02J 7/0016 (2013.01) [G01R 31/3835 (2019.01); G01R 31/396 (2019.01); H02J 7/007182 (2020.01)] | 5 Claims |
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1. A total voltage follow-up charging method, comprising: Step 1 to Step 8, wherein
Step 1 comprises setting a charging voltage/current to a charger;
Step 2 comprises charging, by the charger, a plurality of serially connected battery cells;
Step 3 comprises:
checking a total voltage of the serially connected battery cells,
in response to determining that the total voltage is greater than or equal to a Target Voltage, proceeding to Step 5, and
otherwise, returning to Step 2,
wherein the target voltage is set as follows:
target voltage=charging voltage *k1,
where voltage adjustment k1<1;
Step 4 comprises starting Total Voltage follow-up;
Step 5 comprises determining a Modified Equalizing Trigger Voltage as follows
Modified Equalizing Trigger Voltage=(total voltage/cell number)+k2,
where cell number is a number of the plurality of serially connected battery cells charged by the charger, and
voltage adjustment k2 is an average voltage of a single battery cell multiplied by a factor of 0.5% or less;
Step 6 comprises:
checking a voltage of each battery cell,
in response to determining that the voltage of the each battery cell is greater than or equal to the Modified Equalizing Trigger Voltage, proceeding to Step 7, and
otherwise, returning to Step 3;
Step 7 comprises starting equalizing to discharge the battery cell having the voltage greater than or equal to the Modified Equalizing Trigger Voltage until the voltage of the battery cell becomes lower than the Modified Equalizing Trigger Voltage; and
Step 8 comprises:
checking the voltage of each battery cell,
in response to determining that the voltages of all of the battery cells are lower than the Modified Equalizing Trigger Voltage, returning to Step 3, and
otherwise, returning to Step 7.
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