Data centers have a huge impact on the world we live in. Today data centers account for 3% of the global electricity supply and consume more power than the total of some country consumption. Data centers also contribute 2% of the total global greenhouse gas emissions. Data center's energy efficiency is the eternal hot research and engineering hot topic. In this paper, an advanced distributed power backup battery power system (BBS) design is introduced, also engineering comparison between lead-acid battery (VRLA), lithium iron phosphate battery (LFP) and ternary lithium-ion battery (NCM) is detailed listed with key parameters. Moreover, this paper has proved the best engineering practice of using the cylindrical lithium iron phosphate (LiFePO4) battery for BBS design optimization considering the reliability, cost saving, and energy efficiency of data center deployment in a large scale. Engineering work summarized in this paper includes a serial of related tests of the electrical performance, life cycle and reliability items, and the corresponding test results reaching design targets of power supply capacity, energy efficiency improvement for data center which eventually contributed a total cost ownership (TCO) saving. The theoretical basis, proto product, engineering test result and deployment analysis of LiFePO4 battery backup power system is data-proved reference for ecosystem in their new data center construction.
