Amprius Technologies SiCore SA30 Pouch Cell
Series: Amprius Technologies Battery cells for drone packs
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The Amprius SiCore SA30 is a large-format silicon-anode pouch cell from Amprius Technologies of Fremont, California. It is intended for heavy multicopters whose drives draw very high current in the hover, and it combines large capacity with high continuous current.
The cell stores 26,000 mAh and delivers a continuous discharge current of 104 A at 4C, calculated from C-rate and capacity; at that current it would be empty after 15 minutes. Energy density is 340 Wh/kg, and the dimensions are 144.5 × 106.0 mm in length and width. 200 cycles are quoted. The high current makes the cell usable for drives with large propellers and payload; the cycle figure makes it a consumable that has to be planned for.
Packs built from this cell quickly exceed the limits of passenger aviation: spare batteries above 160 Wh are not permitted there, and between 100 and 160 Wh the airline has to agree. Transport also requires proof of UN 38.3 testing and protection of the terminals against short circuit. Joining cells into a pack remains a job for specialist workshops with test and protection equipment.
When choosing, the ratio of hover current to cell current decides. 104 A through the tabs of a pouch cell calls for clean, generously dimensioned contacting in the pack, and the weight of large cells shifts the centre of gravity. Pouch cells are sensitive to pressure and expand; heat under continuous load shortens the already limited 200 cycles further.
Technical data
Other data
| C-rate | 4correct |
|---|---|
| Capacity (mAh) | 26,000correct |
| Cell chemistry | Li-Ion Si-Anodecorrect |
| Cell count (S) | 1Scorrect |
| Continuous current (A) | 104 Acorrect |
| Energy density (Wh/kg) | 340 kgcorrect |
| Form factor | Pouchcorrect |
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- Check the hour meter against the service records — a replaced instrument is the most common gap.
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