Uninterruptible power supply system battery failure and abnormal handling

The most critical part of why an Uninterruptible Power Supply (UPS) can provide a specific duration of battery life in the event of a power outage is the energy storage battery in the UPS system. If the energy storage battery fails, it may not be able to provide effective battery life and may not be able to provide emergency batteries in the event of a power outage, even causing energy consumption when powered on.

There are many types of Uninterruptible Power Supply (UPS) batteries, and the causes of various battery failures are also complex. However, many failures do not form in a short period of time, and some failures are difficult to detect from the outside. Repairing major battery failures is not easy. It must be replaced, therefore strengthening the daily maintenance and management of energy storage batteries is a necessary condition to ensure the safe operation of batteries.

1.Lead acid batteries:

When the inner plate of a lead-acid battery is short circuited or disconnected, the battery should be replaced. If the capacity of lead-acid batteries decreases, the electrolyte should be replaced and the battery capacity should be restored by repeated charging. If the capacity is still below 80% of the rated capacity after three charges and discharges, the battery should be replaced. In addition, when lead-acid batteries have defects such as bent plates, cracks, and expansion, and when the capacity is less than 80% of the rated capacity, the battery should also be replaced.

When the insulation of lead-acid batteries decreases and the insulation resistance value is lower than the specified value on site, the insulation monitoring device will issue a grounding signal, and the instrument can display the grounding electrode. At this point, the ventilation conditions in the battery room should be improved to reduce indoor humidity. Clean the shell and bracket with alcohol. If the insulation still does not meet the standard after using the above method, replacement can be considered.

When there is excessive sediment at the bottom of lead-acid batteries, a straw can be used to remove the sediment and replenish the newly configured electrolyte. The electrolyte temperature of lead-acid batteries in operation should be controlled below 35 ° C.

2.Valve regulated lead-acid battery:

For valve regulated lead-acid batteries, when there are abnormal phenomena such as short circuits, partial discharges, or high temperatures inside the battery, the charging current should be reduced, the charging voltage should be lowered, and the safety valve should be checked for blockage.

When valve regulated lead-acid batteries lose water and dry up, the electrolyte material deteriorates. The battery should be replaced immediately.