BMS – Battery Management System



Redflow's Battery Management System (BMS) creates 'smart batteries'

The key to Redflow’s “smart batteries” is the Redflow Battery Management System (BMS) which:

  • Simplifies Redflow battery deployment and configuration
  • Remotely monitors and manages Redflow batteries
  • Ensures Redflow batteries always contain the latest software updates.

Control via a web browser

The BMS is a small DIN Rail-mounted device that connects one or more Redflow batteries with the inverter-charger that your installer provides for your energy storage system. The BMS lets you set up, monitor, and control your Redflow battery using a web browser. It also provides battery status and operational information to your AC inverter-charger so that it can optimise its use of the electrical energy stored in your battery.

Embedded know-how

The Redflow BMS is a device that embeds more than a decade of know-how in the efficient and effective real-world operation of Redflow’s unique zinc-bromine flow battery. The BMS enables rapid on-site commissioning using just a smartphone or laptop. The BMS also provides secure remote access via any Internet path, using its built-in Ethernet or WiFi ports, to the Redflow battery management cloud service.

Cloud-enabled remote monitoring and management

The Redflow BMS leverages modern cloud infrastructure to enable easy and effective remote access to installations of Redflow’s zinc-bromine flow batteries. The BMS supports remote system performance monitoring, alarm monitoring, diagnostics, performance optimisation and software updates. The BMS also gives integrators a “fleet-wide” view of their customer sites and enables Redflow to cooperatively optimise sites with integrators.

Real-time display and system control

The Redflow BMS ‘knows’ how to efficiently run ZBM2 and ZCell batteries including:

  • Seamlessly managing battery maintenance cycles
  • Optimising energy efficiency by sequencing batteries in charge and discharge to suit the application requirements
  • Real-time status display and system control
  • Continuous logging performance data to the secure Redflow cloud, and
  • Remote battery fault detection and management.

Industry standard

The Redflow BMS uses industry-standard protocols to interface ZCell or ZBM2 clusters to energy storage systems. The primary protocols supported for energy system interfaces are CANBus BMS protocols, MODBUS-TCP, and URL-based data retrieval using JSON or plain text.

Interfaces

  • Isolated Power Supply input (9-65V DC)
  • Ethernet and WiFi Internet access ports
  • Opto-Isolated CANBus port for energy system interfacing
  • RS485 MODBUS port for ZCell/ZBM2 connection
  • Dry-contact relay for external device control using built-in event-based rules engine
  • Also supports external device control via MODBUS-TCP write commands and using USB-attached relays, and
  • USB ports for future expansion.

More about the Redflow BMS (Battery Management System)

Frequently Asked Questions about the BMS         Click here to read the Redflow BMS FAQ

ZBM2 system integrators

Redflow’s unique ZBM2 zinc-bromine flow batteries are designed for stationary energy storage applications for industrial, commercial, telecommunications and grid-scale deployment.  ZBM2 batteries are sold, installed and maintained by an international network of system integrators

ZBM2 system integrators

System integratorProductRegion/sC&ITelcoGridResidential
Blue Sky EnergyZBM2AustriaX
CellnexxZBM2United Kingdom,
Ireland
XX
Green StealthZBM2Kuwait, Jordan, LebanonXX
Hitech SolutionsZBM2New Zealand, Australia, Fiji, Pacific IslandsXX
Jaladri Prima IntertradeZBM2IndonesiaXX
SMS Global Technologies Inc.ZBM2PhilippinesX
Specialized Solar SystemsZBM2South Africa and southern AfricaXXX
TSUS Excellent Engineering CoZBM2ThailandXX
VertivZBM2Australia, New ZealandXX

 

LSB (Large Scale Battery) reference platform

The Redflow Large Scale Battery (LSB) reference platform demonstrates a straightforward and proven model for deploying ZBM2 zinc-bromine flow batteries in large energy storage systems. Deployed in a six-metre (20-foot) shipping container, Redflow’s LSB reference platform contains as many as 45 ZBM2 batteries and six 12-kilowatt (kW) Victron Quattro 48/15000 battery inverter/chargers, providing customers with 24/7 monitoring and scalable energy capacity to as much as 450 kilowatt-hours.

The LSB reference platform assists Redflow system integrators to design large energy systems that integrate the number of ZBM2 10kWh batteries and Victron battery inverter/chargers required to supply the customer’s energy storage application.


Product Features

LSB: Tailored large-scale energy storage

  • The LSB reference platform can provide a large AC energy storage solution to meet your needs

LSB: Large and scalable energy capacity

  • Standard six-metre (20 foot) shipping container configuration contains as many as 45 ZBM2 batteries and the required number of Victron battery inverter/chargers. Redflow batteries deliver 3kW continuous power, and 5kW peak, with the LSB system output rating dependent upon the size of the Victron energy cluster deployed in the system.
  • Scalable ZBM2 configurations are available to meet specific customer requirements.
  • When large energy storage is needed, the LSB can be deployed in parallel to form multiple container configurations.

LSB: Inherently safe and smart ZBM2 design

  • ZBM2 batteries contain an inherently non-flammable zinc-bromide electrolyte.
  • ZBM2 batteries contain low risk of thermal runaway due to the physical separation of the cell stack and energy storage tank.

LSB: Robust and long-life ZBM2 design

  • Each LSB contains as many as 45 ZBM2 10kWh zinc-bromine flow batteries.
  • LSB is ideal for renewable energy storage or unstable grids because of its 100% depth-of-discharge characteristics, which mean no battery damage from power outages
  • ZBM2 batteries and LSBs can be stored fully discharged with no required maintenance.
  • ZBM2 batteries and LSBs require no trickle charge when deployed or stored.
  • ZBM2 batteries and LSBs deliver guaranteed energy throughput.

LSB: 24/7 monitoring and diagnostics

  • Redflow ZBM2 batteries in the LSB are monitored and managed by a secure Internet-accessible Battery Management System (BMS), that enables quick and easy remote support. Real-time status information on the battery system can be accessed using the BMS. This data can be accessed using secure web browser access, JSON data queries, CANBus battery status messages or MODBUS-TCP queries.

Flexible Configurations

LSB: ZBM2 BUILDING BLOCKS OF SUSTAINABLE ENERGY STORAGE

The Redflow LSB reference platform assists system integrators to design an energy storage system containing an agreed number of ZBM2 batteries to meet your specific application. The ZBM2 features Building Block Technology and flexible modular design, enabling your integrator to configure an LSB to your requirements.

Integrated electronics & monitoring

System Integrators

For assistance with installation and integration, please contact the Redflow team.

Contact Redflow

ZBM2 zinc-bromine flow battery


ZBM2 - where power meets intelligence, delivering sustained energy storage from the world’s smallest zinc-bromine flow battery, monitored and managed online.

Rewriting battery rules. 100% storage. 100% available

Redflow’s ZBM2 battery is a unique energy storage system that redefines your understanding of how a battery works. This scalable 10 kilowatt-hour (kWh) zinc-bromine flow battery delivers 100 per cent depth of discharge each day for a warranted 10 years – without causing any damage to the battery.

High performance. At high temperatures

The ZBM2 performs flawlessly in warm climatic conditions without external cooling. Unlike legacy battery chemistries, the performance, safety and operational lifetime of the ZBM2 zinc-bromine flow battery is unaffected by ambient temperatures as warm as 50°C (122°F).

10 kWh capacity. From Day One to Year 10

The ZBM2 delivers 10 kWh of sustained energy storage every day, backed by Redflow’s 10-year warranty. ZBM2 zinc-bromine flow batteries provide 100 per cent of their stored energy, with no loss of storage capacity – for a decade!

Scalable storage. From one to dozens

The ZBM2 zinc-bromine flow battery is designed to work on its own and can also scale to work as part of a much larger energy storage system, with as many batteries as you require.  ZBM2s are easy to deploy in scalable parallel clusters for high availability, high scale deployments at the largest sites.

Internet-ready. For easy remote access

The ZBM2 battery management system (BMS) captures performance data in real-time to enable 24/7 remote monitoring. Monitor and manage your ZBM2 batteries from your computer or mobile phone, using easy web-based notifications and controls.

Environment-friendly battery. Fully recyclable

The ZBM2 zinc-bromine flow battery is made from easily recycled or reused components. At its end of life, the battery’s zinc bromide electrolyte solution can be purified and used for new batteries.

Safe energy storage. Wherever you need it

ZBM2s are intrinsically safe devices, even when used in the most demanding locations. The temperature-tolerant zinc-bromine flow battery contains an inherently non-flammable electrolyte solution, with a design that means there’s no chance of ‘thermal runaway’.

Sustained storage. 10-year warranty

Redflow’s ZBM2 zinc-bromine flow battery delivers 10 kWh of energy storage, with 100 per cent depth of discharge, on a daily basis for a warranted battery lifetime of 10 years or 36,500 kWh energy throughput – whichever comes first.

Simple. One-step charging

Using 100 per cent of its 10 kWh energy storage capacity, Redflow’s ZBM2 zinc-bromine flow battery delivers a constant power supply, due to a flat voltage curve and simple one-stage charge profile.

Standby for years. Start in seconds

The ZBM2 zinc-bromine flow battery can be stored at any state of charge – from full to empty – for weeks, months or even years. When you need power, the ZBM2 starts within 30 seconds, ready to deliver 100 per cent of its stored energy. Please contact Redflow for further details on this option.

Redflow. Redefines the battery

Redflow’s zinc-bromine flow battery redefines your understanding of how a battery works. With 100 per cent depth of discharge daily, the ZBM2 delivers a sustained 10kWh of energy storage capacity throughout its operating life.

ZBM2 Technical Specifications

Voltage

  • 48 Volt DC nominal batteries (typical operating range 40-60V)

Capacity

  • Maximum 10kWh energy output per daily cycle
  • No reserved battery capacity requirement – full 10kWh cycle depth available

Dimensions

  • 845 L x 823 H x 400 W (mm)
  • 33 L x 32 H x 16 W (in)

Weight

  • 240 kg (530 lb) with electrolyte
  • 90 kg (198 lb) without electrolyte

Electrolyte volume

  • 100 L (26Gal)

Energy efficiency

  • 80% DC-DC Max

Internal (electrolyte) operating temperature

  • Operating electrolyte temperature range of 15°C to 50°C (59°F to 122°F), ZBM2 can typically operate at ambient temperatures outside this range for extended periodsE

Communication

  • MODBUS RS485

Safety data sheet

  • DG Class 8 for electrolyte 

Power rating

  • 3kW (5kW peak)
  • 3kW continuous: current up to 75A (40V disconnection point) *1
  • 5kW duration depending on the State of Charge (SOC): current up to 125A (40V disconnection point) *1, 2

Regulatory compliance marks

  • CE and RCM

Warranty

  • 36,500 kWh of energy delivered or 10 years (whichever comes first) *3
  • No cycle depth limitations – battery performance and lifetime is not sensitive to cycle depth

* 1 Values reported for ZBM2 at 100% state of health (SOH) and room temperature
* 2 Redflow internal testing shows a 5kW supply for approximately 45 minutes before disconnection, for a ZBM2 starting at 100% state of charge (SOC)
* 3 See full warranty document for details, Terms and Conditions apply

More resources

ZBM2 case studies and technical documents

Document nameDescriptionIssue date
Case study: Williams Burton LeopardiDarling Building beats energy shortfall with Redflow (Adelaide, South Australia)August 2018
Case study: Mossel Bay MunicipalityMossel Bay goes carbon neutral with Redflow (South Africa)January 2018
Case study: Bosco Printed CircuitsBosco beats power cuts with Redflow batteries (Johannesburg, South Africa)September 2017
Case study: Simon HackettHackett house powers through SA blackout (Adelaide, South Australia)September 2016
ZBM2 White PaperUnderstanding the Redflow BatteryOctober 2018
ZBM2 and ZCell FAQAnswers to frequently-asked questions about Redflow batteriesOctober 2017
ZBM2 DatasheetSpecifications and benefits of Redflow's ZBM2 zinc-bromine flow batteryNovember 2017
ZBM2 Installation ManualRedflow ZBM2 (3kW/10kWh) Installation and Operation ManualMay 2018
ZBM2 Product WarrantyZBM2 Product Warranty Terms and ConditionsJanuary 2017
ZBM2 CE CertificateEC Declaration of ConformityMay 2018
LSB (Large Scale Battery)Learn about Redflow's LSB (Large Scale Battery) which holds at many as 450 kilowatt-hours of energy

Energy storage systems

Energy storage for residential, industrial, commercial, telecommunications and grid-scale deployment

Store and shift renewable energy, manage peak grid load and support off-grid power systems and telecommunications with Redflow’s ZBM2 and ZCell zinc-bromine flow batteries and the company’s Large Scale Battery reference platform energy storage solution.  Featuring a plug-and-play storage system and the ability to self-manage, protect and monitor 24/7, our range of zinc-bromide flow batteries can shift energy in large volumes. The batteries are designed to support applications ranging from telecommunications and renewables integration to on-grid and off grid remote power, microgrids and smart grids, and transmission and distribution deferral.

Redflow ZBM2

ZBM2 batteries are ideal for residential, telecommunications, commercial and industrial and grid-scale energy storage

View more

Redflow ZCell

ZCell is the unique zinc-bromine flow battery designed to provide energy storage for your home or office in Australia

View more

* Click here to download a PDF of the Redflow Limited Terms and Conditions (Ts&Cs) document 

Demonstration Trial Partners

Redflow has installed electricity storage system with end users, such as utilities and research organisations, for demonstration and trial purposes.

Ergon Energy Corporation

Ergon Energy

Ergon Energy is the Queensland Government-owned electricity distributor to regional Queensland, with an asset base of $8 billion and more than 650,000 residential and business customers.

RedFlow supplied 30 ZBM systems for installation and integration within the Ergon Energy electricity supply network, as part of the Australian Government’s Advanced Electricity Storage Technologies (AEST) program. The systems were used for managing peak electricity demand within three locations in Ergon Energy’s rural network and were remotely monitored by both RedFlow and Ergon Energy.

Ausgrid and the Australian Government

AusGrid

Ausgrid is a major utility in New South Wales Australia.  In conjunction with the Australian Government’s Smart Grid, Smart City trial, Redflow installed sixty R510 residential energy storage units in Newcastle and the Hunter Valley as part of the Australian Government’s Smart Grid, Smart City project.  Redflow’s involvement with this part of the project extended from late 2011 to mid-2013.

Another R510 was also installed as part of the Newington Smart Home sub-project.  Redflow began its involvement with this trial in 2010 with a lead-acid energy storage system, after which the system was upgraded to an R510 in late 2011 before ending its time at the Smart Home in mid-2013.

Please see the Smart Grid, Smart Cities R510 Case Study for more information regarding Redflow’s experience with Australian utility, Ausgrid, of the design, installation and operation of 61 R510 electricity storage systems in New South Wales, Australia. Redflow’s Whitepaper also provides an overview of key results and lessons learnt from the project.

Redflow installation partners

Redflow’s ZMB2 zinc-bromine flow batteries are sold, integrated and maintained through a network of international system integrators while its ZCell batteries are available only in Australia. Please note Redflow does not sell to the public, only through trained installation partners. Please contact us for more information about becoming a Redflow system integrator.

ZCell installers

ZCell is a unique Australian-designed energy storage system built around Redflow’s 10 kilowatt-hour (kWh) ZBM2 zinc-bromine flow battery. ZCell is available ...

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ZBM2 system integrators

Redflow’s unique ZBM2 zinc-bromine flow batteries are designed for stationary energy storage applications for industrial, commercial, telecommunications and grid-scale deployment.  ZBM2 batteries are ...

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