Li-Ion (Lithium-Ion) is the most common cell for mobile applications – Ranging from mobile phones to usage of space applications. These cells are very easy to come-by, the problem is assembling them correctly, with the proper electronics & control and verifying their performance.
| Why do we really like Li-Ion projects | When we do not necessarily recommend to use Li-Ion cells |
- Because Li-Ion is usually cost effective, so we can supply a relatively cheap solution.
| - When our customer asks for very high currents. The Li-Ion has relatively high Internal Resistance and therefor drops voltage in high currents
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- Because Li-Ion from large companies are very reliable
| - When our customer wants to maximize capacity in given volume. Li-Ion is common in a few basic dimensions. Most of the times cannot reach 100% volume usage.
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- Because Li-Ion cells are available. Most of the brands are easy to purchase.
| - When our customer wants minimum weight. Li-Ion Polymer (Pouch) is better than L-Ion
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- Because Li-Ion has also very reliable and cost effective brands.
| - When our customer has an application operating in low temperature (again, that IR)
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- Because the majority of Li-Ion (from large companies) have all the certifications needed
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| Basic features | - Easy to assemble – short proto-type time.
- Environmentally Friendly – No cadmium, mercury or other heavy metals.
- High Energy Density – ~245 Wh/Kg
- Discharge currents: 2C max
- Long Cycle Life – Charge and discharge can be repeated over 500 times (and >800 in most times) with stable discharge voltage during normal operation.
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| Performances of High end cells | - Cells for High Energy Density per Mass: up to 260 Wh/Kg
- Cells for High Energy Density per Volume: up to 760 Wh/Liter
- Cells for High discharge currents up to 30A
- Cells for Up to 2000 cycles
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| High end cells: | - Cells for High Energy Density per Volume: up to 760 Wh/Liter
- Cells for High discharge currents up to 30A
- Cells for Up to 2000 cycles
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Li-Ion standard Cells
Samsung ICR18650-26 | 3.7V | 2600 | 18.4 | 65.0 | 2C | | 47.0 |
Panasonic NCR18650A | 3.6V | 3100 | 18.6 | 65.2 | 2C | | 45.5 |
Panasonic NCR18650B | 3.6V | 3350 | 18.3 | 65.1 | 2C | | 47.5 |
Panasonic NCR18650PF | 3.6V | 2900 | 18.6 | 65.2 | 10A | 18A | 47.0 |
LG INR18650-MJ1 | 3.635V | 3500 | 18.5 | 65.2 | 10A | | 49.0 |
Samsung INR18650-30Q | 3.6V | 3000 | 18.4 | 65.0 | 15A | | 48.0 |
Samsung 21700-48G | 3.6V | 4800 | 21 | 70.5 | 9.6A | | 67.4 |
Item P.N. | Voltage | Capacity [mAh] | Dimensions [mm] | C-Rate / Discharge | Weight [gram] |
Ø max | L max | Max | Peak |
Typical assemblies:
