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Recharge Requirements for Batteries with Low SOC
- Recharge batteries if the battery system is powered off for commissioning or batteries are discharged. Otherwise, batteries may be damaged due to overdischarge.
- Battery overdischarge and damage may occur if batteries with low SOC are stored. Batteries should be recharged in a timely manner.
- If batteries cannot be recharged by connecting the battery supply, recharge the batteries by referring to Recharge with a Portable Battery Charger/Discharger.
Storing batteries with low SOC may occur in the scenarios including but not limited to the following:
- Batteries cannot be charged after commissioning and power-off.
- Batteries are not charged in time after commissioning and power-off.
- After batteries are discharged, the power grid does not supply power for a long time and batteries cannot be charged in time.
- After batteries are discharged, they cannot enter the charging state due to a system fault.
- Batteries are not charged immediately after EOD.
Table 6-4 Mappings between SOC ranges and charging intervals
SOC Range |
Maximum Charging Interval |
|---|---|
SOC ≥ 20% |
30 days |
15% ≤ SOC < 20% |
25 days |
12% ≤ SOC < 15% |
20 days |
9% ≤ SOC < 12% |
15 days |
6% ≤ SOC < 9% |
10 days |
4% ≤ SOC < 6% |
5 days |
SOC < 4% |
2 hours |