Four major safety considerations for UPS lithium batteries

Do a good job of the four major safety considerations for UPS lithium batteries Beijing, January 2, 2019 (PR Newswire) As the last barrier to the data center power system, new battery technology is triggering a huge new energy revolution. In recent years, Uptime global data center survey data show that 10% of data centers choose lithium batteries (hereinafter referred to as lithium batteries) as UPS energy storage equipment. Compared with lead-acid batteries, lithium batteries have unparalleled technical advantages: the energy density of lead-acid batteries is several times that of lead-acid batteries, which reduces the space occupied by lithium batteries by more than 60%; components are reduced by more than 70%; Strong high temperature adaptability; fast charging after discharge, the number of cycles is 4 times that of lead-acid batteries. The long-life planning of 10-15 years and the high number of cycles make UPS need not replace lithium batteries during the 10-year life cycle, reducing maintenance and replacement costs, and ultimately helping users reduce TCO and achieve maximum commercial value. Schneider Electric: Consider the safety of lithium batteries from four perspectives. In our country, the trend of UPS switching to lithium batteries will be more rapid. As a leader in global data center infrastructure solutions and services, Schneider Electric has conducted accurate positioning and research on shopping malls and found that in addition to purchase price factors, the most important thing for Chinese customers to choose UPS lithium batteries is safety. As the largest energy storage element in the data center, the safety of lithium batteries largely depends on the following four points. Schneider Electric recommends that users should pay attention to the following points when choosing: 1. High-quality battery processing and quality control At present, the world's best lithium battery manufacturers have selected advanced active processing lines, only through high-quality processing control In order to ensure the high quality and high consistency of the battery. After the processing of lithium batteries, more than one battery module (commonly known as module) will be required to be connected in series and in parallel. In this process, the positive and negative terminals of the battery are connected. Large manufacturers usually choose laser welding machines for the terminals to reduce contact resistance. , To ensure the stability of the terminal connection. However, small manufacturers choose manual bolt and nut compression during the entire process, which is difficult to ensure the firm connection of the terminal blocks, which may cause trouble for long-term operation in the future. Due to the strict quality control of lithium batteries, compared with lead-acid batteries, the cycle life of lithium batteries has been improved. Many major brands of lithium batteries can achieve a 10-year warranty in the field of data centers. 2. Perfect BMS planning BMS (Battery Management System) is the core skill positioning for the safety of the entire lithium battery system. When the battery has faults such as over-voltage charging, over-current discharge, battery short-circuit, etc., the fault current can be quickly cut off through the BMS to prevent the risk of battery heat loss. Schneider Electric believes that lithium battery BMS not only monitors the voltage and current temperature of each cell in real-time supply to analyze battery health trends, but more importantly, it can actively balance the charge and discharge of cells, and ultimately improve the consistency of each cell and prevent The failure of the entire battery is due to the barrel short-board effect. At present, the international first-line brand lithium battery manufacturers are planning to process the BMS by themselves to ensure the functional matching of the battery and the BMS and the safety of charging and discharging. 3. Lithium battery chemistry data Regarding data center UPS, due to its high-current discharge time, high discharge power, long-term standby electric floating charging and other application characteristics, the more suitable skills are lithium iron phosphate, lithium manganate, and NCM. Yuan Li and other skills. In my country, ternary lithium and lithium iron phosphate are the first two products launched on the market. Although there are controversies over energy density and safety, it is undeniable that these controversies are limited to the theoretical functions of lithium battery positive data. Schneider Electric believes that the safety of the lithium battery system should consider the negative data, electrolyte, diaphragm, and many other factors. 4. The compatibility test of lithium batteries and UPS is different from lead-acid batteries. Lithium batteries are equipped with BMS, which is a kind of intelligence. The battery can self-regulate and communicate with the UPS host. When the lithium battery is overcharged, it will automatically detonate from the UPS charger, and traditional UPS software programs may interpret it as a battery failure. More importantly, the charge and discharge voltage, current and cut-off voltage of different lithium batteries are different. For example, the extra voltage of a lithium iron phosphate battery is 3.2v, and the extra voltage of a ternary lithium battery is 3.8v. Therefore, UPS must perform strict matching tests on the lithium battery before using it, and update the UPS firmware of the lithium battery. It is worth mentioning that the UPS launched by Schneider Electric in recent years now has lithium battery compatibility. The high-rate lithium battery used by UPS can be charged and discharged with high current in a short period of time, which is in line with UPS charger planning and changes in demand habits. Schneider Electric's newly launched GalaxyV series UPS can supply up to 40% of the extra power for the UPS (in contrast, the traditional UPS can only supply 10% to 15% of the power). Therefore, in theory, a powerful The charger can charge a lithium battery for 30 minutes to 1 hour. With the increasing maturity and cost-effectiveness of lithium battery technology, UPS will rapidly transform from lead-acid batteries to lithium batteries. Since 2012, the world's first lithium battery data center has been put into use. Schneider Electric has been a leader in advancing the application category of lithium battery technology in the data center, with a strong brand and technological innovation power, walking in the new data The center is at the forefront of changes in energy technology and leads the entire career. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Domestic lithium battery separators are facing huge challenges and opportunities