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Redflow ZBM (Zinc Bromide Module)

Redflow ZBM (Zinc Bromide Module)

ZBM2

 

Redflow Battery video

Installation Images

 

WHAT IS A FLOW BATTERY AND HOW DOES IT WORK?

Each battery contains about 100 litres of a water-based zinc bromide salt solution that circulates in two separate hydraulic circuits. When charging, zinc is extracted from the zinc bromide solution and stored on a plastic membrane. During discharge, zinc is released back to the solution. A major benefit of this process is that it causes no degradation to the battery when the zinc is removed at the end of each cycle, giving it a sustained, long-life energy storage capacity.

REDFLOW BATTERIES REDEFINE YOUR UNDERSTANDING OF HOW A BATTERY WORKS

  • Redflow batteries deliver 100 per cent cycle depth of discharge without causing any damage to the battery
  • Redflow batteries retain their full energy storage capacity throughout their expected life, unlike legacy battery types which lose considerable storage capacity with age
  • Redflow batteries require no reserved capacity, unlike legacy battery types that must reserve a significant portion of their storage capacity to prevent damage to the battery. Therefore with Redflow batteries there is no over-sizing required
  • Redflow batteries present no fire risk: Their bromide-based electrolyte is a natural fire retardant while mechanical damage does not risk explosion or ‘thermal runaway’
  • Redflow batteries can operate at ambient temperatures as hot as 50°C without active cooling
  • Redflow batteries offer unlimited shelf life: You can switch off a Redflow battery at any state of charge, hibernate it for extended periods of time, and then access its stored energy within 60 seconds
  • Redflow batteries have a great recycling story as they are made from components that are easy to recycle or reuse
  • Redflow batteries are designed and developed in Australia and available globally through a scalable manufacturing partnership with Flex in North America.
     

REDFLOW BATTERIES RETAIN FULL ENERGY STORAGE CAPACITY FOR THEIR WARRANTED LIFE

A Redflow battery can be completely discharged every single day without causing any damage to the battery. This means a Redflow battery retains its full energy storage capacity throughout its warranted life.This stands in stark contrast to other battery chemistries, such as lithium, which must reserve a significant portion their energy storage capacity to avoid battery damage and also experience reduced storage capacity over time. As Redflow warrants its batteries to deliver 100 per cent of their original energy storage capacity for at least 10 years, this eliminates the need for oversizing capacity, making Redflow batteries capital expenditure competitive with older battery technologies.

REDFLOW BATTERIES CAN BE LEFT CHARGED OR FULLY DISCHARGED WITHOUT IMPAIRING PERFORMANCE

Redflow batteries can sustain regular outages without impairing its energy storage capacity or lifetime performance. Redflow batteries can also be suspended, stored or hibernated, with anything from no charge to a full charge, for as long as required. This sets Redflow batteries above traditional battery chemistries, which lose charge over time and require trickle charging. The ability of Redflow batteries to hibernate without harm or loss of stored energy makes them ideal for applications that require only occasional energy draws, such as seasonal businesses or an unstable grid.

REDFLOW BATTERIES ARE EXTREMELY SAFE

Redflow batteries contain a bromide-based electrolyte that is a natural fire retardant. With a separate tank and stack, there’s no chance of mechanical damage causing a thermal runaway.
Redflow batteries also require no fire suppression system or safety abuse testing.
 
REDFLOW BATTERIES WORK WITHIN A WIDE RANGE OF TEMPERATURES

The performance, safety and lifetime of Redflow batteries are unaffected when the internal electrolyte temperature is maintained within the range of 15 to 50 degrees Celsius. No active cooling is required. If the electrolyte temperature exceeds this range, the Battery Management System (BMS) will safely shut down the battery until the temperature returns to the tolerated range.
It is important to note that the electrolyte temperature is different from ambient air temperature. As flow batteries have a large thermal mass, including 100 litres of electrolyte solution, this means that the internal battery temperature is much less volatile than the ambient air temperature.

REDFLOW BATTERIES CAN BE USED BOTH ALONE AND IN MULTIPLES

Redflow batteries are designed to enable you to deploy an energy storage system that uses as many batteries as you need to support your requirements. You can install just one Redflow battery or as many as 60 Redflow batteries, in a container-size Redflow LSB (Large Scale Battery), which can store 600kWh of energy for grid- scale deployments. Multiple containers can also be connected for larger storage requirements.

REDFLOW BATTERIES ARE WELL-SUITED FOR OFF-GRID ENVIRONMENTS

Redflow batteries are a great choice for off-grid energy systems, with many technical superiorities, including performance, lifecycle and robustness.

REDFLOW BATTERIES ARE MADE FROM RECYCLABLE OR REUSABLE COMPONENTS

The Redflow battery is constructed from easily recyclable materials, such as polyethylene plastic, aluminium and galvanised bolts.
The largest, and most expensive, element of the Redflow battery is the 100 litres of water-based zinc bromide electrolyte, which weighs about 140 kg. The beauty of this electrolyte is that, unlike lithium, it is cost-effective and practical to reuse.

REDFLOW BATTERIES ARE DESIGNED IN AUSTRALIA AND MANUFACTURED GLOBALLY

Redflow is an Australian company with its head office, research and development centre in Brisbane. Redflow has the test lab and installer training centre for its ZCell residential energy storage system in Adelaide. The full Redflow battery range, from the ZBM battery, which is at the heart of ZCell, to the Redflow LSB (Large Scale Battery), is manufactured in North America by Flex, one of
the world’s largest end-to-end supply chain solution providers. This enables Redflow to ramp up manufacturing rapidly to meet demand. With a global manufacturing footprint, Redflow can service key areas at their nearest point. This scalable manufacturing enables Redflow to increase production quickly at a relatively low cost.

REDFLOW  BATTERIES  ARE  SMALLER  AND MORE FLEXIBLE THAN OTHER FLOW BATTERIES

Redflow makes the world’s smallest flow batteries. Alternative flow battery designs, such as vanadium, are much larger and provide a lower energy density. This means similarly rated flow batteries from other manufacturers have a much larger physical size, causing floor loading, logistics and installation issues.
 
SIMPLIFIED BATTERY MANAGEMENT WITH REDFLOW’S BATTERY MANAGEMENT SYSTEM (BMS)

Each Redflow battery comes with an integrated Battery Management System (BMS) that can manage one or more flow batteries. Accessed via a standard web browser from a personal computer, tablet or smartphone, the BMS is an intuitive web- based management system that provides an easy way to set up, monitor, and control your Redflow battery. The BMS uses various industry standard protocols to integrate the Redflow battery with energy management electronics from a wide range of vendors. The BMS can also provide control signals to various external systems and interfaces.
 
For example, it can coordinate the operation of a backup generator using dry-contact relay outputs, MODBUS-TCP commands or via JSON data queries over a TCP/IP connection. These control signals can be based on a wide variety of battery status criteria such as state-of-charge, battery voltage and time-of-day.
The BMS also provides integrated graphs showing a variety of key performance characteristics and allows for the downloading of detailed battery system performance data securely over any available Internet connection. Leveraging that connection to  offer additional benefits, the BMS can be remotely upgraded over the Internet and also supports remotely upgrading the control firmware embedded inside each battery. Battery performance and status information can also be accessed remotely.

REDFLOW ZBM2 (Zinc Bromide Module)

Why Redflow zinc-bromide flow battery technology?

COMPETITIVE CAPEX

100% of the capacity is usable over lifetime, with no capacity fading therefore no oversizing required

BEST IN CLASS LCOS

Warranted electrode stack lifetime 36,500 kWh energy delivered or 10 years (whichever comes first)

UNLIMITED SHELF LIFE

Sustains regular outages without battery damage and can be suspended, stored or hibernated from 0% to 100% state of charge

RECYCLE OR REPURPOSE

For all Redflow battery components and electrolyte

CONSTANT POWER

Charge 100% of the capacity with constant power, due to a flat voltage curve and simple one stage charge profile

COMPACT AND HIGH ENERGY DENSITY

0.34m2 (3.7ft2) with expected electrode stack throughput 40,000kWh
 
GREATER SAFETY

Fire retardant electrolyte, no thermal runaway due to separated tank and stack
 
No fire suppression system necessary or safety abuse testing required
 
NO ACTIVE COOLING REQUIRED

Lifetime, safety and performance are not affected by temperature

INTUITIVE WEB BASED MANAGEMENT SYSTEM

24/7 remote self-monitoring with real-time data capture accessed via the web, through the MODBUS communications system

Typical Charge and Discharge Curves

ZBM2 Datasheet Sept16 Digital 2

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

WEIGHT: 240kg (530 lb) with electrolyte; 90kg (198 lb) without electrolyte

ELECTROLYTE VOLUME: 100L (26Gal)

NET ENERGY EFFICIENCY: 80% DC-DC Max

OPERATING ELECTROLYTE TEMPERATURE RANGE: 15°C to 50°C (50°F to 122°F), ZBM2 can typically operate at ambient temperatures outside this range for extended periods

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)

 WARRANTY:

  • Electrode stack: 36, 500 kWh of energy delivered or 10 years (whichever comes first)(3)
  • All other parts: 3 years(3)
     

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, T's and C's apply

 

 

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