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Items |
Details |
Benchmarks |
Maintenance |
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① Total battery group voltage |
Use multi-meter checking total voltage across positive and negative terminals |
1.The value of measured and displayed on equipment should be close. 2. Voltage error after compensation should be less than ±50mV |
Adjust the charging voltage to recommended range if there is a deviation; Repair the equipment if voltage can’t be adjusted. |
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② Battery appearance |
Bulge, leakage or damage |
Appearance should be ok |
Replace the battery if bulge, leakage or damage |
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Dust, dirty |
Clean |
Cleaning |
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Connectors, terminals |
No rust |
Clean and antirust dealing |
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③ Battery surface temperature |
Use infrared thermometer measure surface temperature |
Less than 35℃ |
Further check and analyse if high temperature found |
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④ Connections |
Use torque wrench to check connection hardware |
Refer to torque values |
Re-tight if there is a loose connection |
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Connector appearance |
No rust |
Clean or replace if rusted connectors found |
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⑤ Switch-over |
Disconnect AC power, switch-over to UPS, or DC power |
Switch-over is smooth |
Further check if there is a problem |
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Items |
Details |
Benchmarks |
Maintenance |
|
① Float voltage for each battery |
Measure the voltage of each battery under floating, using a meter with four and half digits. |
Voltage differences less than 2V: 90mV 6 V: 240mV 12 V:480mV |
If there is a deviation, discharge the batteries and perform a equalizing charging, observe for one through two months under floating. Contact us if no improvement. |
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② Correct the low voltage batteries |
1、Charging the whole battery group, using equalizing voltage and discharge for one through three times. 2、Use a charger to repair the individual battery |
Voltage differences less than 2V: 90mV 6 V: 240mV 12 V:480mV |
Replace the battery if can’t be corrected.
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③ Activated discharge |
Perform a discharge-charge cycle, using lower level of equalizing charge voltage for the charge. |
Discharge around 30% of the nominal capacity. |
Perform the discharge-charge cycle if no power-off for six months. |
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Items |
Details |
Benchmarks |
Maintenance |
|
① Check-up discharge |
Disconnect the AC power and discharge the battery to a DOD of 30%～40% |
The final voltage be greater 2.60V/cell. |
Perform a equalizing charge if voltage less than 2.6V/cell. Observe for one through two months. Contact us if no improvement. |
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② Capacity test |
Discharge battery at I10 current to 3.6V/cell |
Remained capacity higher than 80% |
Replace battery with low capacity |
