As the trend of "Lithium batteries gradually replacing lead-acid batteries" advances, the application of lithium-ion batteries has become a hot topic in the data center industry. Recently, Frost & Sullivan, a global authoritative consulting organization, released the "Global Data Center Lithium-ion Battery Analysis Report." The report provides a comprehensive interpretation and analysis of the current status and requirements of lithium-ion battery applications, the data center lithium-ion battery market size, market application scenarios, and how to improve the reliability of lithium-ion batteries. I will have a general interpretation of this report!
First, the report puts forward the following points:
Frost & Sullivan analysis believes that in 2020, lithium-ion batteries will account for 15% of the global data center battery market, but with the continuous increase in the application of lithium-ion batteries in data centers, it is expected that this proportion will significantly rise to 38.5% by 2025.
Data center segments including industry, power grids and energy storage, automobiles, and consumer electronics will increasingly use lithium-ion batteries. Among them, with the increasing adoption of clean energy technologies and the increasing demand for energy storage systems (ESS), it is expected that the overall contribution of energy storage applications in the total market will increase from 13% in 2020 to 15% in 2025.
For the data center industry, the power supply system is like the heart of the data center, providing reliable and stable power for equipment. The battery is considered to be the source of life for power supply. Compared with lead-acid batteries, lithium batteries have the advantages of long life, small footprint, low load-bearing requirements, simple maintenance, environmental protection, reliability and stability, and will surely become data center backups in the future. First choice for electricity.
One of the main concerns of data center operators with lithium-ion batteries is the substantial increase in initial costs. Lithium-ion batteries are usually 1.3 to 2 times more expensive than lead-acid batteries. It is expected that the price of lithium-ion batteries may fall steadily. By 2028, the price of batteries will be less than $100/kWh. This trend will offset concerns about initial costs.
Reliability is one of the bottlenecks in the development of lithium-ion batteries to large-scale energy storage technology. Generally speaking, the safety problems of lithium-ion batteries are manifested as burning. The root cause is the internal short circuit of the electricity and the internal thermal runaway caused by external factors such as overcharging, squeezing, puncture, and falling.
Li-ion charging circuits and controls are different from lead-acid batteries. Data center operators need to consider whether the existing UPS system is compatible with lithium-ion technology, and whether hardware and embedded software upgrades are required.
At present, for the application of lithium-ion batteries in data centers, reliability is the main consideration for customers. To improve the reliability of lithium-ion battery applications, Frost & Sullivan suggested that, first of all, a stable battery cell material should be selected. Among all currently used battery cell materials, lithium iron phosphate has a stable molecular structure and is more difficult to run out of heat. In addition, it does not produce combustion aid (oxygen) after thermal runaway, and generates less heat. Even if thermal runaway occurs, it is difficult to catch fire. For example, through acupuncture test to verify the reliability of lithium iron phosphate, it is verified that after a short circuit and thermal runaway occurs inside the battery, the test result will not catch fire.
Secondly, at the system level, the reliability of lithium batteries is improved through intelligent means. Lithium battery's BMS management system is particularly important. It is necessary to identify faults and maintain in advance through multi-level intelligent BMS management, and control thermal runaway at an early stage to prevent fires. On the one hand, the reliability of the battery can be predicted by the internal short-circuit algorithm. When the internal short circuit of the battery cell reaches a certain condition, it can be identified by the algorithm, and an alarm is generated to remind the user to replace the faulty battery in time to prevent thermal runaway. On the other hand, the BMS system should have a current sharing control function to ensure that the current of each group of batteries is the same when multiple groups of batteries are running in parallel, so as to ensure the consistency of the batteries. While maximizing the backup time, it can also improve the reliability of the battery and reduce the failure rate.
Finally, combine prevention and fire fighting. The reliability of lithium batteries is mainly about prevention. Once a fire occurs, the impact of the fire needs to be controlled to the minimum, and the fire is controlled to not spread in the cabinet. At the same time, the cabinet is required to have fire-fighting means, and when a fire occurs, the fire-fighting in the cabinet can be activated to quickly extinguish the fire. The fire fighting method in the cabinet can be module level or cabinet level.
BSLBATT B20 is a battery energy storage system with a capacity of 1.1MWh, suitable for scenarios such as small C&I, microgrids, and distributed renewable energy power stations.
The system uses a 20-foot-long prefabricated structure. Modularly designed container. The container neatly integrates 8 138kWh energy storage units, PCS, transformers, fire fighting units and environmental monitoring units.
Separate the battery room from the electrical room by using fire-fighting pipes and optimized air ducts to ensure the safe operation of the system throughout its life cycle
BSLBATT has made great achievements in the lead-acid battery replacement market for forklifts. It has installed a safer and more reliable lithium battery system for more forklifts. With the control of the BMS board, the internal data of the battery can be visualized, and the maintenance and replacement are better. Convenience. Therefore, we also hope that in terms of lithium battery energy storage, we can achieve better achievements than lithium batteries for electric trains, help more countries and regions complete the establishment of distributed energy stations, and maximize the utilization efficiency of renewable energy.
The BSLBATT team has been working hard to reduce carbon pollution and carbon emissions, and contribute to the development of global renewable energy and the use of green energy!
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