flinders island isolated power system (ips) connect 2016 s troman itp
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Initial findings from the Battery Test Centre
IPS Flinders Island 2016
About ITP
• Specialist renewable energy consulting firm
• Over 35 years international experience and 1,500 projects
• Offices in Australia, UK, Portugal, India, and China
Why are we testing?
• Lead has ruled the medium scale / off-grid for too long
• Heavy and bulky = shipping costs increased
• Maintenance issue = early failure
• Relatively lower levels of discharge and cycle life
What are we testing?
Lithium-ion manufacturers claim:
• higher efficiency
• deeper discharge
• longer cycle life
• tolerance to high temperatures
But not independently verified
Trial Objectives
To inform future energy storage investors by
analysing the performance of six major lithium-ion
battery brands / types and comparing these to lead-
acid technologies.
• Canberra-based test centre
• Comparing six lithium-ion batteries to a
conventional lead acid battery and an advanced
lead acid battery.
• Fast (4-hr) charge and discharge
• Mimicking ‘real world’ temperatures
• Publishing performance data
What we are testing
Product Country of Origin Chemistry
Tesla USA Nickel Manganese Cobalt
Sony Fortelion Japan Lithium Iron Phosphate
LG Chem Korea Nickel Manganese Cobalt
CALB China Lithium Iron Phosphate
Samsung Korea Nickel Manganese Cobalt
Kokam Storaxe Korea Nickel Manganese Cobalt
EcoUlt Ultraflex USA Lead Carbon
Sonnenschein Germany Lead Acid
The Battery Test Centre
The Battery Test Centre
The Battery Test Centre
The Battery Test Centre
How are we testing – temperature and charge and
discharge profile
How are we testing – temperature and charge and
discharge profile
How are we testing – temperature and charge and
discharge profile
What we are measuring
• Number of charge / discharge cycles
• State of Charge at 10 minute intervals
• Monthly capacity tests (100% DOD)
• Total energy throughput
• Battery efficiency
• Temperature data
Knowledge Sharing Website
batterytestcentre.com.au
Initial results - temperature
Initial results – temperature
Initial results - temperature
Initial results – BMS failures
• Tesla BMS failure
• Temporary and resolved by Tesla
• Issue with Solar Edge inverter firmware
• KOKAM (ADS Tec) BMS Failure
• Has led to total Battery cell failure
• Currently working with ADS Tec/KOKAM to resolve the issue.
Conclusions from initial results
• Higher Efficiency – in most cases
• Deeper discharge – Confirmed
• Longer cycle life - TBC
• Tolerance to higher temperatures – in most cases
Lessons Learned
• The Li-ion battery market is still evolving.
Products are replaced, upgraded or discontinued
frequently.
• Technical support is often not available in
Australia – local sales staff do not always
understand their products. Getting better
• Safety requirements for batteries can add
significant cost in commercial applications.
• Li-ion batteries are often only compatible with a
limited range of inverters.
• Battery pack voltages can vary considerably (i.e.
many are based on the lead acid standard of 48V
while others are high voltage, e.g. Tesla)
Lessons learned
• Temperature derating of batteries may not be
linear, so care must be taken in design and
installation
• Wide range of temperature responses; this needs
to be investigated further
• Li-ion battery efficiency not always as good as
manufacturers claim but still superior to PbA
• BMS reliability is key – manufacturers need to
prove whole system reliability
Key things to consider
• Standardisation of communications
between BMS and inverters is required
• Safety standards need to catch up with
current technology
• Keeping up to date on technological
developments is key, as the market is
moving so quickly.
Flow on
• First Lithium-Ion battery on a Pacific island
• ACT NextGen initiative
• LG, Tesla, Kokam, Samsung have all visited the Batt lab
and regularly communicate with staff
• Batt Lab has hosted visits from MPs, technology companies
Phase 2
• Wider range of battery technologies
• Different testing parameters appropriate to
the technology
• Focus on full systems (inverter+battery)
rather than just battery packs
• Seeking interest from stakeholders
Southern Cross House,
6/9 McKay St, Turner, ACT
PO Box 6127 O’Connor, ACT 2602
info@itpau.com.au
p +61 (0) 2 6257 3511
f +61 (0) 2 6257 3611
itpau.com.au
ITP Renewables Consulting | Engineering | Implementation
Thank you for your time
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