A Utility-Grade Battery Management System for Energy Storage
Nuvation High-Voltage BMS™ is a utility-grade battery management system for commercial, industrial and grid-attached energy storage systems. Used by energy storage system integrators worldwide, Nuvation battery management systems can be found in energy storage systems in the PJM market, municipal microgrids, island grids, EV charging stations, and more.
Nuvation battery management systems simplify and lower the cost of your energy storage system with stack management features that are typically found only in custom-developed energy controllers. In addition to delivering highly precise battery management, Nuvation’s battery management systems include a range of protection and safety features that preserve battery life and add layers of functional safety to your energy storage system. They also enable robust system integration by providing battery data to power conversion systems, safety and environmental controls, and energy controllers. (User Manuals and Technical Resources)
Battery management system features
- Scalable – From kWh to MWh, Nuvation High-Voltage BMS™ manages up to 1250 VDC per battery stack and up to 36 stacks in parallel with the addition of a Grid Battery Controller.
- Ensures Pack-Level Safety – Identifies cells that need servicing or replacement. Communicates with power conversion systems (PCS) and initiates preventive action to protect the battery and ensure safe operation.
- Designed for System Integration – Utilizes industry-standard communication protocols such as Modbus TCP (Ethernet), Modbus RTU (RS-485), and CAN, as well as the Sunspec / MESA specification to make battery data available to power conversion systems and communicate with other external systems.
- Supports Virtually Any Battery Chemistry – Over 1500 configurable registers allow you to fine-tune Nuvation BMS™ to support most battery chemistries - including lead batteries - and their charge characteristics. And if you change your battery topology or select different batteries, simply answer some questions in the user-friendly. Quick-Start Wizard to generate a new configuration file.
- Open Wire Detection – A large-scale energy storage system can have hundreds or thousands of voltage taps and temperature sensors connected to battery management modules. Faulty connections can be difficult to diagnose and locate and can cause errors in data reporting to components that manage the battery, which can result in cell damage. Nuvation BMS™ detects and reports the presence of disconnected and poorly connected voltage taps and temperature sensors.
- Smart Stack Connection – When a stack is brought online, voltage and current mismatches between the stack and DC bus can lead to transient voltages and current surges that can damage batteries and components. Utilizing an auxiliary circuit, the BMS will perform an autonomous pre-charge routine that helps prevent current surges when connecting a stack to the DC bus. It also tests the connection beforehand, connects the stack only when it is safe to do so, and informs the PCS when it is safe to begin charging or discharging the stack.
- Smart Stack Disconnection – When receiving a shutdown signal, the battery management system will reduce the current limits before opening the contactors. It can also control bi-directional contactor configurations to support disconnection under load. When you design your energy storage system with two contactors per stack, each opening in the direction of the power flow, Nuvation battery management systems will match the contactor disconnection sequence to align with the power flow. This reduces the risk of contactor damage or disconnection failure. If a contactor has failed or become welded shut during operation, the Nuvation BMS will detect it, inform you about it, and open the second contactor to take the stack offline for repair.
- Power-On Self-Test – When you turn on your Nuvation battery management system it will first conduct a diagnostic test to verify the integrity of communications across all BMS modules. If a communications error is discovered, the BMS will report the error and prevent the battery stack from connecting to the PCS. After the problem has been rectified by service personnel, the BMS will automatically resume its start-up routine and upon successful completion will make the battery available for connection to the PCS.
- User-Friendly Operator Interface – Remotely connect to view and tune system performance, make BMS configuration changes, take down or bring up stacks, and update BMS firmware.
- Black-Start Support – Provides black start support by allowing all BMS modules to be powered off the battery instead of using an external power source.
Supported by Experienced Energy Storage Engineers
When you select Nuvation battery management systems, you are partnering with a company that has been in business for over two decades and a team of industry experts that work on energy storage projects every day. Having completed over a thousand engineering projects since 1997, we can provide whatever level of support you require, from BMS system integration to energy storage systems design, commissioning and on-site field support.
Scalable Modular Architecture
The Nuvation High-Voltage BMS™ modules that manage a battery stack include a Stack Controller, Power Interface, and Cell Interface. A single-stack system configuration includes one Stack Controller, one Power Interface, and one or more Cell Interfaces connected in series. This modular architecture supports battery pack voltages as high as 1250 VDC. Cell Interface modules can manage up to 16 cells each. One Stack Controller can manage up to 48 Cell Interface modules. The Grid Battery Controller (GBC) manages multi-stack battery configurations by aggregating the Stack Controllers and managing all cells and stacks as a single unified battery.
High-Voltage BMS Standards & Conformance
ELECTROMAGNETIC COMPATIBILITY (EMC) - CONDUCTED AND RADIATED EMISSIONS
- FCC CFR 47 Part 15 Subpart B : 2016 - Unintentional Radiators, Class A
- IC ICES 003, Issue 6 : 2016 - Information Technology Equipment (Including Digital Apparatus) - Limits and Methods of Measurement, Class A
- CISPR 32 : 2015 / EN 55032 : 2015 - Electromagnetic compatibility of multimedia equipment - Emission requirements
- CISPR 24 : 2010 / EN 55024 : 2010 Information technology equipment - Immunity characteristics - Limits and methods of measurement
- EN 61000-4-2 - Electrostatic Discharge
- EN 61000-4-3 - Radiated Field Immunity
- EN 61000-4-4 - Electrical Fast Transients (Bursts)
- EN 61000-4-5 - Surge
- EN 61000-4-6 - Conducted RF Immunity
- EN 61000-4-8 - Power Frequency Magnetic Field
- EN 61000-4-11 - Voltage Dips and Interrupts
- Construction in compliance to technical standards of CAN/CSA-C22.2 No. 60950-1:2007/A2:2014-10, UL 60950-1:2007/R:2014-10, and IEC 60950-1:2005 (Second Edition) + Am 1:2009 + Am 2:2013
- CE - compliant with European Union (EU) health, safety and environmental protection directives and regulations
Validated by DNV GL
“DNV GL has validated the performance of Nuvation High-Voltage BMS and believes it has demonstrated the level of safety required for operation in stationary applications. Further, Nuvation’s engineering team have demonstrated an advanced understanding of energy storage technologies and controls and have developed a highly configurable, technology agnostic system capable of rapid field configuration and which demonstrates many of the advanced features DNV GL believes are required for proper active safety from the BMS. Nuvation’s design, which incorporates General Purpose Inputs/Outputs (GPIO) allows for integration with the balance of system, including fire detection and alarm systems and other sensors that many systems do not possess.”
– Nick Warner, Senior Test Engineer, Energy Advisory Laboratory Services, DNV GL
MESA Open Standards for Energy Storage
Nuvation BMS™ is conformant with the MESA-Device/SunSpec Energy Storage Model. This Model addresses how energy storage components are packaged and arranged, electrically connected and able to communicate with each other and other operational components.
Nuvation BMS™ can be integrated with any other MESA-conformant energy storage hardware or software without the custom middleware often required to enable different companies’ products to work together. MESA-Device Specifications are built on the Modbus protocol.