davideserin
1 W
- Joined
- Feb 1, 2016
- Messages
- 63
Hi,
I've built quite a few packs using Sanyo GA cells and had hardly any issues at all, even when intentionally pushing them to their limits.
I've recently built three packs with HG2 cells and had issues with them all. However, i was pushing them to their limits too, so i wanted to ask if anyone can clarify how likely cell failure is under these conditions:
1. Momentary short circuits of the cells or pack. (A misplaced piece of nickel shorting the pack for a few seconds during the assembly).
2. Using Regen with the Phaserunner at 4A per cell (I tried it at around 6A per cell for a few rides too). I presume slight capacity reduction, but not cell failure.
3. Using controller battery current limit at their max of 20A per cell (I did this for around four rides and have it at 16A per cell normally). Again expected capacity reduction, but not cell failure.
4. How sensitive are the cells to overcharging? (i tried to use Battery Medics in place of a BMS or balance charger, but left it a bit long between balances and had a few cells fail.
I appreciate that limits are limits and understand that short circuits are bad, but i tested the GA packs to their limit and beyond and they retained capacity.
My overall question is if the HG2s are more sensitive to abuse than the GAs, but it would be great to know which of my abusive conditions were more likely to result in cell failure over capacity reduction.
Thanks in advance for any insights!
I've built quite a few packs using Sanyo GA cells and had hardly any issues at all, even when intentionally pushing them to their limits.
I've recently built three packs with HG2 cells and had issues with them all. However, i was pushing them to their limits too, so i wanted to ask if anyone can clarify how likely cell failure is under these conditions:
1. Momentary short circuits of the cells or pack. (A misplaced piece of nickel shorting the pack for a few seconds during the assembly).
2. Using Regen with the Phaserunner at 4A per cell (I tried it at around 6A per cell for a few rides too). I presume slight capacity reduction, but not cell failure.
3. Using controller battery current limit at their max of 20A per cell (I did this for around four rides and have it at 16A per cell normally). Again expected capacity reduction, but not cell failure.
4. How sensitive are the cells to overcharging? (i tried to use Battery Medics in place of a BMS or balance charger, but left it a bit long between balances and had a few cells fail.
I appreciate that limits are limits and understand that short circuits are bad, but i tested the GA packs to their limit and beyond and they retained capacity.
My overall question is if the HG2s are more sensitive to abuse than the GAs, but it would be great to know which of my abusive conditions were more likely to result in cell failure over capacity reduction.
Thanks in advance for any insights!