Why UPS batteries catch fire easily and how to take fire prevention measures?

Time of issue:2023-09-22


In the UPS power operating system, the most important component is the UPS battery. Just because it is important, it is necessary to master certain knowledge of battery maintenance. However, according to relevant data surveys, at least 30% of the causes of major accidents in UPS power supplies are caused by battery fires. Therefore, the following 8 situations occur. Be careful. Improper handling can easily cause the UPS battery to catch fire.

The causes of battery fires generally include the following:

1. There is a problem with the quality of the battery itself, and the connection between the terminal head and the plate is dangerous.


2. When the battery is transported or installed, cracks appear in the shell and are not discovered in time. After installation, the acid inside the battery precipitates and chemically reacts with the battery rack or battery cabinet, directly leading to the conductive fire.


3. The battery and cable are not firmly connected, causing the contact resistance to be too large. After the temperature rises, the contact surface is seriously oxidized, which causes the contact resistance to continue to increase, eventually causing electrical sparks or even arcing, which then ignites nearby combustibles and causes a fire.

4. The connecting cable of the battery pack has insufficient voltage resistance, resulting in insulation breakdown between cables, resulting in a cable short circuit and fire.

5. The battery equipment is unreasonable and exceeds the battery discharge limit.

6. The battery connecting cable was scratched by the iron sheet of the battery cabinet when entering and exiting the battery cabinet, causing a short circuit in the insulation layer.

7. The charging current or voltage of the UPS power supply host is too large, causing the battery to overcharge and generate heat, causing the positive and negative plates to deform and bend, causing contact heating, leading to fire.

8. The external connecting cables or internal connecting cables of the battery pack are not inspected and replaced in time due to long-term use and aging insulation, resulting in short circuits and fires between the cables or between the cables and the battery cabinet.

UPS battery fire prevention measures:

1. Control the charging amount without overcharging to reduce the amount of gas evolution. In the charging room, open flames are strictly prohibited and ventilation is maintained.

2. During charging, the wiring points must be firm to avoid sparks caused by looseness.

3. Low voltage constant voltage charging is used during use, so the amount of gas evolution is small.

4. Prevent cracks in the UPS battery shell, electrolyte penetration, and penetration into the cable trench, causing short circuits, sparks, fires, and explosions.

5. Although the maintenance-free battery is sealed and equipped with an exhaust valve, a certain amount of hydrogen and oxygen gas is stored inside the battery. Once the exhaust valve fails or becomes inoperable and the internal pressure is too high, the battery will rupture or even break. Explosion, fire. Therefore, the exhaust valve must be kept reliable.

6. During the charging process, make sure that all wiring points are firm because if the wiring points are loose, sparks will be generated, which will cause hidden dangers for the battery to bulge.