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6.3 Battery Maintenance
Danger: Battery maintenance can ONLY be done by qualified and authorized personnel.
Danger: Some maintenance items must be turned off at first.
6.3.1 Voltage Check
[Periodical Maintenance] Check the voltage of battery system through the monitor system.
Check if the system voltage is abnormal. For example: Single cell’s voltage is abnormally high or
low.
6.3.2 SOC Check
[Periodical Maintenance] Check the SOC of the battery system through the monitor system.
Check if the battery string SOC is abnormal.
6.3.3 Cables Inspection
[Periodical Maintenance] Visually inspect all the cables of the battery system. Check if the
cables are broken, aging or loose.
6.3.4 Balancing
[Periodical Maintenance] The battery strings will become unbalanced if not being fully charged
for a long time. Proposal: every 3 months do the balancing maintenance (charge to full),
normally
it will be done automatically through communication between system and external device.
6.3.5 Output Relay Inspection
[Periodical Maintenance] Under low load condition (low current), switch the output relay to OFF
and ON to hear the clicking sound, which means this relay can be turned off and on normally.
6.3.6 History Inspection
[Periodical Maintenance] Analyze the history records to check if there is an accident (alarm and
protection) or not, and analyze the reasons.
6.3.7 Shutdown and Maintenance
[Periodical Maintenance]
Some battery function must be restarted before the EMS maintenance. ESS maintenance shall be
done at least once every 6 months.
6.3.8 Recycle
NOTE
Damaged batteries may leak electrolyte or produce flammable gas.
In case a damaged battery needs recycling, follow the local recycling regulations (i.e. Regulation
(EC) Nº 1013/2006 among European Union) to process, and use the best available techniques to
achieve recycling efficiency.
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