January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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Energy storage summary and other forms of power
Choosing the correct power source is critical, as mentioned earlier. The following table provides a summary comparison of different components in a system to be considered when picking the correct power source:
|
Category |
Li-ion Battery |
Supercap |
|
Energy density |
200 Wh/kg |
8-10 Wh/kg |
|
Charge-discharge cycles |
Capacity drops after 100 to 1,000 cycles |
Nearly infinite |
|
Charge-discharge time |
1 to 10 hours |
Milliseconds to seconds |
|
Operational temperature |
-20oC to +65oC |
-40 degrees Celcius to +85 degrees Celsius |
|
Operational voltage |
1.2 V to 4.2 V |
1 V to 3 V |
|
Power delivery |
Constant voltage over time |
Linear or exponential decay |
|
Charge rate |
(Very ... |
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