Battery Management: Widening Energy Storage.Will 1500V BMS replace 1000V BMS as a trend?

How do Battery Management Systems (BMS) contribute to the wider application of energy storage?

As centralized photovoltaic (PV) plants and energy storage systems (ESS) move towards higher capacities, high-voltage direct current (DC) emerges as a key technological solution for cost reduction and improved efficiency. The trend is shifting towards energy storage systems with a DC side voltage of 1500V. Compared to traditional 1000V systems, the 1500V systems raise the voltage tolerance of components such as cables, BMS hardware modules, and PCS, from not exceeding 1000V to not exceeding 1500V. The 1500V technology for energy storage systems is derived from the PV system sector, where, according to CPIA statistics, the market share of 1500V DC voltage level in domestic PV systems was approximately 49.4% in 2021, and it is expected to increase gradually to nearly 80% in the future. The adoption of 1500V energy storage systems improves compatibility with PV systems.

Efficiency and Cost Benefits:
Looking back at the development of PV systems, achieving a DC voltage of 1500V has proven to be advantageous. By increasing the input and output voltage levels, it is possible to reduce line losses on both the AC and DC sides and minimize losses in low-voltage winding of transformers. This improves the overall efficiency of the power plant system, increases the power density of equipment (inverters, transformers), reduces volume, and decreases transportation and maintenance efforts. Taking the 1500V PV system solution announced by TBEA in 2016 as an example, compared to traditional 1000V systems, the 1500V system achieved at least a 1.7% increase in efficiency, reduced initial investment by 0.1438 yuan/W, decreased the number of devices by 30-50%, and shortened inspection time by 30%. The 1500V energy storage system also demonstrates performance improvements compared to the 1000V solution. For instance, in the case of a solution provided by Sungrow, the energy density and power density of the battery system increased by more than 35% compared to the 1000V system. With the same capacity power plant, fewer devices are required, leading to significant cost reductions in battery systems, PCS, BMS, and cables, as well as reduced infrastructure and land investment. The estimated initial investment cost of the 1500V energy storage system is more than 10% lower than that of traditional solutions.

Challenges and Enhanced Requirements:
However, with the increased voltage of 1500V in energy storage systems, challenges arise. The increased number of battery cells in series presents difficulties in maintaining consistency among the cells. Moreover, higher requirements for protection against DC arcing and electrical insulation design must be addressed. However GCE 1500V BMS solves this one problem perfectly.

Conclusion:
The advancement and adoption of 1500V energy storage systems offer significant benefits in terms of efficiency and cost reduction in the field of renewable energy. As the industry continues to evolve, addressing the challenges associated with higher voltage systems will be crucial to ensure the safe and reliable operation of these advanced energy storage solutions. If you want to know more details about GCE 1500V BMS,please contact cara@hngce.com

 

 

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