The essence of energy storage is to solve the contradiction between the continuity of power supply production and the intermittency of power demand, and to realize the stable operation of power in the power generation side, grid side and user side. Electrochemical energy storage is currently the most potential energy storage technology due to its high energy density, high technological maturity, long life of usage and other advantages with long-term profitability. Lithium battery is an important form of electrochemical energy storage, occupying a major position in the application of energy storage market. Therefore, BMS of lithium battery plays an indispensable role in the ESS in turn. This article will introduce the two Lithium battery BMS energy storage applications: BESS and C&I ESS, so as to further elaborate the importance of BMS for the safe operation of the energy storage system.
BESS is also known as front-of-the-meter energy storage, which can be further divided into power generation side ESS and grid side ESS. Energy Storge Solution plays a significant role in both scenarios.
From the view of grid side, which is also currently the main form of application, ESS can act as a flexible “independent power station” to alleviate grid congestion and maintain grid stability, improve transmission and distribution capacity and quality of electricity, and therefore, solve the problem of power supply and demand imbalance.
From the perspective of the power generation side, the characteristics of renewable energy will bring 15% -30% of the grid anti-peak regulation pressure. Thus, under a higher requirement of peak and frequency regulation, equipping with ESS can solve the problem of renewable energy consumption.
BESS Application Scenario
C&I ESS, along with Residential ESS, is categorized as behind-the-meter energy storage. It is often applied in industrial and commercial business parks. The arbitrage of peak and valley tariffs is the most direct way to realize the economic value of ESS: Users can charge the energy storage battery with cheaper valley tariffs when the load is in the low valley, and in the peak load, the storage battery will supply power to the load to realize the transfer of the peak load, and therefore, obtain the income from the peak and valley tariffs.
At present, C&I ESS can also be combined with photovoltaic to realize the self-generation and self-consumption of power. due to the consistent time of electricity consumption peak and photovoltaic power generation peak, the distributed C&I ESS+PV is high in ratio of self-generated and self-consumption, thus saving the cost of electricity and ensuring stable power supply in special circumstances.
Whether in BESS and C&I ESS, electrochemical energy storage based on lithium battery is inseparable from the BMS.
For small and medium-sized C&I ESS, lithium battery BMS provides an integrated system solution of data acquisition, data analysis, logic processing and data mapping, which can provide over-charging, over-discharging, over-current, over-temperature and short-circuit protection for the battery packs, and real-time detection of the battery's safety status, early warning, and accurate estimation of SOC/SOH.
In the application of BESS, lithium battery BMS carries out unified management of batteries on a hierarchical level with a more complex structural. According to the characteristics of each level, the lithium battery BMS calculates and analyzes all kinds of parameters and operation status of the battery, to realizes the effective management of equalization, alarm, protection, etc. In this way, each group of batteries can achieve equal output so that the system can realize the best operation status and the longest operation time. Lithium battery BMS also provides accurate and effective information on battery management. Through the equalization of the battery, BMS can greatly increase the efficiency of the battery's energy utilization, optimize the load characteristics, and extend the battery's life of usage to the maximum extent.
Gerchamp provides lithium battery BMS solutions to guarantee the efficient, reliable and safe operation of the energy storage system for BESS, C&I ESS, as well as other energy storage application areas.
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