UPS battery failure – Why?

UPS Battery failure is common and happens. Power Continuity explains how this can be avoided, with careful planned maintenance and by following these simple steps.

1. Operational TemperatureFailed UPS batteries

The optimum battery performance is achieved if the battery operational ambient temperature is constantly between 19ºC and 22ºC in a dust free , NON humid environment

Reasons why?

Below 19ºC or much lower and batteries will under perform placing a strain on the battery.

Above 22ºC will increase the battery capacity unnecessarily and dramatically reduces battery life.

2. Causes of overheating

High battery temperatures happen when the ambient temperature of battery storage environment is constantly above 22C. If the ambient remains constantly above 22C then this adversely effects the chemical structure of the batteries causing the internal heat generated by the batteries to also rise and therefore give off additional heat. This causes the situation to get worse and is a vicious circle, “thermal runaway”.

When batteries charge, they give off heat , hence the room MUST be cooled with a working A/C system.

3. Battery Installations

whether in racks of purpose built cabinets must have a minimum 10mm gap between each block; this is for ventilation and to allow heat dispersal and ‘hot spots’.

4. Battery failure

As each individual battery cell weakens over time, the battery will charge at a disproportionate faster rate than the norm and will begin to take down the rest of the battery string of which it is apart of. It will over heat as the battery overcharges creating hot spots as each the cell fails until all the cells in that battery completely, fail

5. Battery Discharge cycles

The more the UPS batteries are used the more the battery life is reduce as there is a direct correlation to the number of battery discharge-recharge cycles. Constant discharging of batteries will dramatically reduce the battery life.

6. Battery Terminals

Always ensure the battery contacts are cleaned and greased. Never allow chemical build up on the terminals as this will cause the battery to short and again reduce the battery life.

7. Battery Impedance

Annual battery impedance tests will prove whether the batteries are fully charged, correctly charging, not deteriorating since the last test, and what is their present life expectancy.

During impedance test readings , the status of all the cell terminals will be confirmed and through out the test the UPS remains operational and your Comms will remains power protected.

8. Battery age

All batteries have a design life ‘sell by date’.

This can NOT be stretched beyond that date.

In fact we advise replacing batteries well inside their design life date.

Don’t risk it- Replace early and stay power protected !

9. Battery leaks

All batteries are a chemical mix of acids and chemicals.

Leaks do happen and are ACIDIC and poisonous.

Replace any leaking battery immediately.

If you ignore this, the leak will be corrosive onto the next battery and on and on, causing dangerous gases and FIRE RISK

Contact Power Continuity

On 0845 055 8455

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