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• Variable power output
• Accurate fuel gauge
• High reliability
• Longer life
• Longer range
Software Configurable Battery
More accurate state of charge Standard
(Enables reduced controller costs)Variable power output Standard
Fixed Power Output
Variable Power Output
Pow
er
Time
Pow
er
Time
Lower capital cost per cycle
Char
ge
Discharge
12% Less
Char
ge
Discharge
Standard
Short term power boostStandard
NormalBOOST
NormalBoost
PWR PWR
Lossless cell balancing
100 200 300 400 500
20%
60%
40%
100%
80%
With cell balancing
No cell balancing
Ava
ilabl
e ca
paci
ty
Battery Cycles
Increased capacity (Range)Standard
Increased Range
>14%
Increased cycle lifeTime
80%
90%
100%
100%
>30%Extra Cycles
EOLStandard
Cell Ageing Rate
Immunity to cell failure
Zero Output
Standard
Full Output
Switchable Spare
Features and Benefits
•
•
•
•
•
•
•
•
Standard
Does not need a special charger•xxxxx-#### xxxxx-####
XXX
***
###
TM
aerovironment
[email protected] Boathouse, Silversands, Hawkcraig Road, Aberdour, Fife, KY3 0TZ, SCOTLAND, UKWWW.CHEEVC.COM
Increase in Cycle Life Due to Rest Periods
48 Samples for each test of 300 Cycles with charge rate 0.5C (CC-CV) and discharge rate 1.0C
0
1
2
3
4
5
6
7
1360
1410
1460
1510
1560
1610
1660
1710
1760
1810
1860
1910
1960
2010
2060
2110
2160
2210
2260
2310
2360
2410
2460
Final Capacity with Rest Periods (EOL)
0
2
4
6
8
10
12
14
1360
1410
1460
1510
1560
1610
1660
1710
1760
1810
1860
1910
1960
2010
2060
2110
2160
2210
2260
2310
2360
2410
2460
Ini al Capacity with Rest Periods (BOL)
0
0.5
1
1.5
2
2.5
3
3.5
4
1360
1410
1460
1510
1560
1610
1660
1710
1760
1810
1860
1910
1960
2010
2060
2110
2160
2210
2260
2310
2360
2410
2460
Standard Cycle Final Capacity (EOL)
0123456789
10
1360
1410
1460
1510
1560
1610
1660
1710
1760
1810
1860
1910
1960
2010
2060
2110
2160
2210
2260
2310
2360
2410
2460
Standard Cycle Ini al Capacity (BOL)
>20% Improvement
79% of Cells Exceed EOL Specifications
44% of Cells Exceed EOL Specifications
Manufacturer’sEOL Specification
mAh
mAh
Num
ber
of C
ells
The redundunt cell is bypassed and rested while remaining cells carry the load
A switching matrix provides controlled accessto individual cells and an extra cell in the battery string provides redundancy and increases charge capacity
Sequential cycling rests each cell in turn so that all cells in the battery age at the same rate
The rest periods reduce stress on the cells,resulting in increased battery lifetime
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