A comprehensive solution for UPS power storage batteries in harsh environments

There are many options for the cooling method of the outdoor cabinet. Which cooling method is suitable for the outdoor battery cabinet? This starts with the product characteristics of the UPS battery. For the lead-acid battery in the communication DC power system, the user is most concerned about the service life. The main factors affecting the service life of lead-acid batteries are ambient temperature and grid conditions.

The service life of UPS batteries is closely related to the ambient temperature. The higher the ambient temperature, the shorter the service life of the battery. When the ambient temperature is 25 degrees higher than the temperature required for the design life of the battery, the service life will be cut in half for every 10 degrees increase in temperature.

The discharge times and depth of discharge of the UPS battery directly affect the service life of the battery. The more discharge times and the deeper the discharge depth, the shorter the service life of the battery. That is to say, frequent power outages of the power grid will reduce the service life of the battery.

For outdoor base stations, operators are usually unable to improve the grid conditions or the cost of improving the grid conditions is too high to bear, so start by reducing the working environment temperature of the UPS battery to increase the service life of the battery.

The traditional heat dissipation methods of outdoor cabinets are fan direct ventilation or heat exchangers, but neither of these two methods can make the temperature inside the cabinet lower than the ambient temperature outside the cabinet. For the application scenarios of UPS batteries in high-temperature areas, active heat dissipation is required to keep the temperature inside the outdoor battery cabinet lower than the ambient temperature outside the cabinet. Some manufacturers break through the routine, combine innovations, and introduce refrigeration components into outdoor battery cabinets.

The power changing part of the communication main equipment and the DC power supply will generate heat during the operation of the equipment, but the storage battery is different. According to the electrochemical mechanism of UPS battery charge and discharge, the battery does not generate heat when it is discharged. During normal charging (but not charging) there is basically no heat. That is, the calorific value of the battery during normal use can be ignored. Therefore, there is no heat source in the outdoor UPS battery cabinet, and the cooling capacity required is small. According to estimates, usually only 200W-400W cooling capacity of the outdoor battery cabinet is enough.