Mornsun BCU Power Solution - Energy Storage Systems

As the shift to new energy continues and the need for improving the utilization efficiency of energy grow, the proportion of solar photovoltaic power generation systems in the power grid is gradually increasing. How to ensure reliability and safety of the supply draws a big challenge for the Power Grid. Energy storage systems not only ensure the stability and reliability of the solar PV system, but also brings an effective way to solve dynamic power quality problems such as voltage pulses, inrush currents, voltage dips, and momentary power interruptions.

In energy storage systems, batteries are generally installed in the battery container according to the international standards, which consist of batteries, battery series control unit(BCU), HVAC, fire suppression system, etc.

MORNSUN is always providing you with diverse up-to-date power solutions for the energy storage industry. Check out below the BCU Power Solution for the battery container and see how we can guarantee we'll provide the ideal fit for your system.

The block diagram circuit above shows a more detailed look at the BCU power solution for a battery container. As the core of battery management, BCU power design includes many components from Mornsun's power solution line. With our wide selection in the 200W 300-1500VDC ultra-wide input voltage DC/DC converter PV200-29Bxx series and AC/DC enclosed switching power supply LMF150-20Bxx series, the design features redundant power supplies that provide excellent reliability for the entire energy system.

The BCU collects battery voltage, current signals, and fuse status signals for system monitoring. It keeps communication with the battery Racks and the power conversion system through the CAN bus. When the battery fails, the contractor can be quickly controlled to cut off the battery line to ensure the safety of the whole system.

The design requires a 500 to 1500VDC input voltage isolation DC/DC converter and Morsun's 200W PV200-29Bxx series is ideal for this application. This line of isolation converters features an ultra-wide 300-1500VDC input voltage range, input reverse polarity protection. With a 285VDC under-voltage protection threshold, it keeps the power supply safe during battery discharge. In addition, with double insulation and high isolation voltage of 4000VAC and a safe distance that meets CSA-C22.2 No.107.1 and EN62109 certification, this converter ensures the insulation level of the whole system.

The Mornsun LMF150-20Bxx series is an excellent choice for the BCU power supply with its input voltage range of 85-264VAC, the capability to Withstand 300VAC surge input for 5s, which meets the requirements of the power grid system and greatly improves the reliability of the power supply. Besides, its built-in active PFC function not only provides a power factor of 0.99 but also meets the harmonic current requirements of IEC EN61000-3-2 Class A. Specifically, its EMI meets CISPR32/EN55032 CLASS B that brings very high electromagnetic compatibility to the entire energy storage system.