3 ms·
You can buy Samsung INR18650-30Q (top of the line) off aliexpress in bulk for about $3 a piece. It's about 11 Wh. You'd need 90 of these batteries to make a 1k
by fizixer 8y ago
You can buy Samsung INR18650-30Q (top of the line) off aliexpress in bulk for about $3 a piece. It's about 11 Wh.
You'd need 90 of these batteries to make a 1kWh pack, costing $270. Obviously this does not include casing, assembly, and BMS (battery management system), but that's an inexpensive (probably 10%) overhead.
Buying in "super bulk" and "from alibaba" would probably be even cheaper, and would probably approach $176/kWh.
edit: Check out Jehu Garcia on youtube if interested (no affiliation).
- Vintila 8y agoIs there anyway to confirm they are legit Samsung cells? Batteries seem too ripe for counterfeits.
- fizixer 8y agoTwo options: - Sort by orders. If seller has sold the most, probably a reliable seller. - Buy a handful (or samples) first (you can ask seller that you need samples first), and test their capacity (using e.g., a good charger, I have Zanflare C4). The model I mentioned should have 3Ah (or 3000Ah). If confirmed, those are legit cells.
- Scoundreller 8y agoPlus the first order is the least likely to contain bad cells because you’re doing QA.
- fizixer 8y agoCorrection: 3Ah or 3000mAh.