Housed in a tough enclosure, lithium-ion battery technology provides reliable, lightweight and compact energy storage for UPS systems.
Each battery cabinet has dedicated battery management systems at single module and rack level, plus fuse, circuit breaker protection and a dedicated 24 V power supply.
A single cabinet configuration of 34.6kWh comprises one switchgear, one switched mode power supply (SMPS) and 17 battery modules.
For additional battery capacity, cabinets can be installed in parallel to increase capacity up to 5 MW per single system.
Switchgear collects all information about each battery cell and controls all battery module management systems calculating state of charge (SoC) and state of health (SoH). It also contains a moulded case circuit breaker and a shunt resistor.
SMPS supplies the power for BMS and communicates with UPS and other racks in parallel. It is available in two versions with or without BMS for single or multiple parallel configuration.
Battery module contains eight series-connected 67 Ah, 3.8 V cells and a dedicated battery module management system (BMS), which measures major parameters, controls cell balancing and interacts with the switchgear.
Why Lithium-Ion batteries?
Valve-regulated lead acid (VRLA) batteries – sometimes known as sealed lead–acid batteries – have many advantages and have traditionally been the battery of choice for backup power in UPS systems. However, battery technology has progressed rapidly in recent years. Today, lithium-ion battery technology is an attractive option – especially where high energy density and low weight are important. Advantages such as longer lifespan, smaller size and weight, shorter recharging times and falling prices only add to the appeal of lithium-ion battery solutions.
- Outstanding performance
- Higher Reliability
- Fast charge and discharge rate
- Higher power efficiency
- Low total cost of ownership
- Longer battery life
What is a battery?
A battery is a device that uses chemical means to store electrical energy and can be found in any number of shapes, sizes, voltages and capacities.
When two materials (usually dissimilar metals) are immersed in a solution (electrolyte) they conduct electricity between the ‘plates’ which gives rise to an electrical potential. The value of the potential (or voltage) depends on the plate materials and the electrolyte used. Examples of different battery composition include lead-acid, nickel cadmium (Ni-Cad), and lithium-ion.