A NEW
ELECTRICAL ENERGY STORAGE BATTERY
Engineering Prototypes for
Answer to Economical and Reliable Large Scale Energy
Storage
Custom Designed and Fabricated for Application
Evaluation
Low Cost, Very
Long Life, Zero Maintenance, & Safe
Applications
UPS
Solar and
wind
Emergency lighting
Portable
devices
Hybrid
vehicles
A new
secondary battery is available from Technology Research Laboratories, Inc.
These initial batteries are in the form of engineering prototypes for test and
application evaluation purposes.
Symmetry of design and simplicity results in an extremely rugged, long
life and reliable battery.
The
TRL MIR (Modified Iron Redox)
1.
Life in excess of 1,000,000 cycles, and over twenty years
2.
Cells can be overcharged, reverse charged, and left in
discharged state
indefinitely with no damage.
3.
Discharging at very high rate does not affect life
The photo below shows an
example of a multicell battery array.
Three cells are in series with bipolar electrodes.
Internal dimensions are
6”high x 5” wide x 1.5” thick. Weight is about 2 lbs. Capacity is about 15 ampere-hours, and
maximum open circuit potential is 3.3 volts. The energy density is dependent upon the manner in which it
is discharged, e.g., constant power, constant efficiency or constant current,
and can range from 10 to 40 WH/lb.
Power densities are from 10 to 100 watts/lb depending upon design and
operating conditions.
MIR Operating Characteristics
The graph below shows the
normalized discharge performance of a single cell. The vertical axis is the open circuit
voltage, and the horizontal axis is the percentage of total stored energy
discharged from the battery or cell.
This cell is being discharged at increasing current to compensate for
the diminishment of cell voltage in order to maintain constant power delivery.
Electric potential is
dependent upon the state of charge.
The voltage/current shapes clearly illustrate this characteristic.
Cell voltaic efficiency
is dependent upon the rate of discharge, and is directly proportional to the
internal resistance as well as the charging and discharging currents. Coulombic efficiency is usually close to
100%. If one wishes to charge and
discharge the cell at constant voltage efficiency then it is necessary to
control the charge and discharge current continuously such that a constant
ratio between the open circuit potential and both the charging potential and
the discharging potential is maintained
See our
Web site at www.alternativeenergystorage.com
for additional information about our company and its technologies.
For costs
of test units and delivery timing, please
Contact
TRL via e-mail at:
TRLinc@aol.com
or: info@alternativeenergystorage.com
We are quite
flexible in terms of design and size of units. Depending upon your facilities and
engineering capabilities it may be necessary for TRL to supply appropriate
power management circuitry for charging and control of cell output.