March 11, 2021: Gridtential Energy and Electric Applications
Incorporated will start a new research project on April 1 supported by
the Consortium for Battery Innovation to test bipolar batteries for
residential energy storage.
will supply 24V and 48V 15Ah battery strings for the 15-month project,
which will be tested by EAI in a variety of situations typical for power
supplied by solar panels to behind-the-meter applications.
The capacity of the advanced lead batteries will vary from 5kWh to 15kWh.
is pre-commercial research that will be accessible to all our members,”
says Matt Raiford, technical director at the CBI. “But the commercial
possibilities are huge.
we’ve been involved in with the Pacific Northwest National Lab shows
that at the residential level, lead battery systems are around a third
cheaper for energy storage than their lithium counterparts.
also have major advantages in terms of safety — an issue both to
consumer confidence but also of growing importance to insurance firms —
as well as in terms of more straight-forward electronics and
installation. And that’s not forgetting that lithium batteries have a
very poor recycling rate.”
The residential energy storage market in the US is already booming.
analysis firm Wood Mackenzie reckons 430MW was installed last year,
more than double that of 2019. It expects this trend to continue.
advanced batteries made by Gridtential use silicon wafers instead of
lead grids as current collectors. This reduces the cost of the lead and
shrinks the battery’s size as well as doubles its energy density.
also boosts the cycle life to between 1,500 and 3,000 cycles compared
with a conventional deep cycle lead battery, which offers 400-800.
Lithium batteries, however, offer a life cycle of greater than 4,000
cycles at 80% depth of discharge.
testing of the batteries will use the IEC61427 battery standard, a
common testing protocol for load lifting from solar applications.
project will further the understanding the impact of utilizing
high-voltage silicon joule AGM battery strings on cell balance, battery
management, charge control, and system integration,” says Gridtential
CEO John Barton. “The work will provide valuable insights for field
deployment and demonstrate the performance of our batteries in a
simulated ESS application. EAI brings expertise in testing batteries and
novel approaches of charging lead batteries to extend cycle life.”
will also duplicate the various demand pressures that the batteries
will be exposed to at different times and seasons. A lot of research on
these stresses has already been done by utilities such as Duke Energy.
key question is whether the lead battery industry is ready to embark on
productization — to find development partners such as designers,
installers and manufacturers to advance the deployment of these
batteries in residential energy systems of the future. Historically, the
industry has been reluctant to leave its comfort zone of just
manufacturing batteries and venture into partnerships with applications
tied to their use.
the scope of this project doesn’t include developing an ESS ‘product,
we are also working with a number of system integrators who are excited
to see the results with the intention of using those insights in their
own implementations,” says Barton. “However, the demand for affordable,
fire-safe, behind-the-meter energy storage systems is immense — and with
a recyclable battery solution even better.
view at this point is that there is enough distribution of value
between the battery, enclosure, BMS/control systems, and installation
that the ‘winner’ doesn’t necessarily need to be a battery
project is part of CBI’s 2021 research program aimed at enhancing lead
battery performance under the banner of energy storage.
Reprinted from:https://www.batteriesinternational.com/2021/03/11/cbi-gridtential-eai-research-project-to-trial-advanced-batteries-for-home-storage/(If there is any infringement liability, please inform us in time, we will delete the content immediately, thank you.)