CATALOG 2011 - George Kniest

Specifications
General characteristics
Capacity
Nominal Voltage
2,685 Wh
25.9 V
Final Charge Voltage 29.05 V
Final Discharge Voltage 21.0 V
Nominal Charge
104 Ah
Max Charge
108 Ah
Max discharge rate (A) 160 A Safety feature (power
supply not starter battery)
Max discharge rate (W)
Weight
Dimensions
Volume
Battery chemistry
4,500 W
44 lbs
577.5 x 218.5 x 253.5 mm
32 l
LiNiCoMnO2
Benchmark information
Energy density (weight) 61 Wh/lbs
Energy density (volume) 84 Wh/l
MSRP $2,499
Price-Value ratio
$0.93
($ per Wh)
Power density (weight)
Power density (volume)
Lifetime Data
Cycle Lifetime
Average capacity loss
per year
102 W/lbs
141 W/l
800 cycles @ 100% DoD
@ 77°F
-4 % @ 77°F ambient
temperature
Resulting in capacity loss
of 25%
Handling information
Operating cell temperature -4 to +140°F Battery protects itself
Charge cell temperature 32° to +131°F Battery protects itself
Storage temperature -22° to +131°F
Self discharge rate in Deep
Sleep Mode
< 200 µA Represents 1.6 % per year
Self discharge of cells
Separate charging channel
Charge rate via charging
channel
4 % per year
Yes
15 A Charge time < 8 hours from
0% to 100% (consistent
with Torqeedo charger)
Connection
Max Quick-Charge rate via
discharge channel
Max 2S8P or 1S16P (larger banks require authorization)
100 A Charge time < 1.2 hours
Protection class IP 67 Waterproof, can be submersed
@ 3 ft depth for 30
minutes without damage
Battery composition
Number of cells 336
Cell housing
Steel cylinder safety cell
Capacity per cell
2.25 Ah
Nominal voltage per cell 3.7 V
Cell connection
7s48p
Battery management system and safety
Individual cell balancing Yes Increases lifetime of battery
High current and short
circuit protection
Deep discharge protection
Protection against wrong
charging
Protection against wrong
polarity connection
Individual cell voltage
monitoring
Current Interruptive Device
for each cell
Safety vent for each cell
Poly switch for each cell
Cell temperature
monitoring
PCB temperature
monitoring
Auto-shut down in case of
submersion
Information system
Interface
Electronic battery identification
Yes
> 160 A for 2 s, > 200 A for
0.1 s, > 240 A for 1.5 ms
Yes
Cut off @ < 3.0 V per cell,
Charge protection @ < 1.5
V per cell
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
RS485
Yes
4-level safety cut-off
mechanism to protect
against overcurrent and
short circuit
3 protection levels included
in battery
Important for connection
of multiple batteries into
battery banks
Datalogging Yes Important for warranty
information
19