Battery Management Systems

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Introducing a new scalable and highly configurable battery management system for commercial, industrial, and electrical utility battery packs.

■ Grid Energy Storage

■ Specialty Vehicles / Marine / Robots

■ Telecom / Datacom

■ Technical Specifications

The Nuvation BMS™ is a modular battery management system designed for applications ranging from grid energy storage systems and telecom power backup equipment to specialty vehicles, marine vessels, and mobile robots. Nuvation’s 4th generation BMS architecture, Nuvation BMS is the outcome of Nuvation’s eight years of experience delivering custom battery management systems and 18 years of experience developing complex electronic products for all market verticals.

This new battery management system is comprised of three modules:

■ Stack Controller

■ Power Interface

■ Cell Interface

A typical single-stack system configuration includes one Stack Controller, one Power Interface and one or more Cell Interfaces connected in series. Multiple Cell Interfaces can be connected together in a daisy-chain that increases in height as pack voltage increases. This daisy-chain is connected to a single Stack Controller that manages all cells in the chain. Multiple Stack Controllers can be connected together to support large packs with many stacks in parallel. The Power Interface isolates high-voltage and high-current components of the stack physically and electrically from the other modules. It also powers the BMS directly from the battery stack, eliminating the need for any external power supplies.

Nuvation BMS supports battery pack voltages as high as 1250 VDC, Cell Interface modules containing up to 16 cells each, stacks with up to 48 Cell Interface modules, and battery packs that contain multiple stacks in parallel, which are all managed as one system.

Nuvation BMS Block Diagram
Single stack configuration, grid energy application

Features and Benefits

Safety – Failsafe design includes redundant systems and built-in ground fault impedance measurement to maximize safety and battery protection. Dual independent processors located in different modules monitor each other and the battery cells for unsafe and faulty operation and disconnect the contactors, isolating the battery stack when an unsafe condition is detected.

Accuracy – Includes protection from electromagnetic interference to ensure highly accurate voltage readings and reliable communications.

Reliability – The system can be dually powered by the battery stack as well as via an external power source to remain operational when cells are fully discharged. This allows the BMS to maintain communications with external systems and manage the cell recharge process even from zero voltage.

Scalability – Modular scalable architecture enables the Nuvation BMS to be configured to support batteries ranging from small low-voltage specialty vehicles or large telecom UPS systems to a 1250 VDC grid energy storage system.

Accessibility – Nuvation BMS communicates with external maintenance and monitoring systems via Ethernet, CAN, Modbus, and optional USB Wi-Fi link with iPad user interface.

Updatability – Firmware updates can be performed via Ethernet or USB.

Nuvation BMS supports most cell chemistries, including Li-Ion (e.g. LiCoO2, LiFePO4, LiFeYPo4, LiMn2O4, LiMnO2, LiNiCoAlO2, LiNiMnCoO2, LiPo), Lead-Acid, Nickel-Metal Hydride, Liquid Metal, and others.

Customization options

For clients who need additional customization, Nuvation’s BMS engineering team provides system integration services and client-specific customizations such as a higher or lower stack voltage input, different connector types, custom PCB form factors, enclosure to IP65, added display capability, hardware or software additions, and any other special requirements.

Technical Specifications  |  Grid Energy Storage  |  Telecom/Datacom  |  Specialty Vehicles/Marine/Robots

Patent Pending. Copyright 2014, Nuvation Engineering. Nuvation BMS is a trademark of Nuvation Engineering.
The product specifications shown in this brochure are subject to change without notice.