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CRYSTAL® BATTERY USER MANUAL
5.1 BATTERY
MAINTENANCE
WARNING: During maintenance take precautions
against electrical shock.
WARNING: Crystal® batteries contains sulphuric
acid (< 3%). Sulphuric acid can be harmful to
the skin and eyes. Take precautionary measures
as described in this manual.
WARNING: When batteries are discharged, the
termination voltage should be set according
to the discharging current requirement. The
over discharge protection should be set to be
±0.05V lower than the termination voltage to
ensure good operation and long life of the
batteries and equipment.
After the battery is discharged, it should be
immediately be charged again.
WARNING: When abnormalities or damage is
noticed, the problem should be investigated
immediately. If the battery was the cause it
should be replaced immediately to prevent
further damage.
WARNING: When charging the battery, the con
trollers charge voltage accuracy should be less
than ±1% to prolong battery service life.
WARNING: All display instrumentation should be
regularly checked and calibrated to ensure
accurate reading of measurements. If the
equipment can’t read an error the equipment
could cause damage to the batteries.
The following maintenance process by Crystal®
Batteries series is required.
5.1.1 Quarterly Maintenance
• Keep the battery room clean.
• Measure and record the ambient temperature of
the battery room.
• Check the cleanliness, terminal damage and
signs of overheating, or signs of damage or
overheating on the case and covers of each
battery.
• Check if there are any loose connections and
tighten according to specification.
• Measure and record float voltage of each
battery line. If there are two or more batteries
with voltage falling below 2.18V/cell after
temperature correction, a purification charge
must be conducted to the battery series. See
section 3 purification charge Specifications.
• Conduct an actual load discharge test of the
battery series at least twice a year and release
70% - 80% of the rated capacity of the battery
and record the individual cell voltages with 30
min intervals at C10 loads and 10 min interval
with larger loads.
• A purification charge must be conducted to the
battery series. See section 3 purification charge
specifications.
5.1.2 Annual Maintenance
• Repeat all quarterly maintenance inspections.
• Check for loose connecting screws annually and
tighten them if they are loose.
• Conduct an actual load discharge test of the
battery series at least twice a year and release
70% - 80% of the rated capacity DOD of the
battery.
• A purification charge must be conducted to the
battery series. See section 3 purification charge
specifications.
5. OPERATIONS AND
MAINTENANCE
