As you will see, I’ve labeled our battery packs A & B, just to have some easy recognition for those when charging etc. I brought Risa the battery pack B as he agreed to test those battery packs for us. So all his findings below & huge thanks!!
Battery pack A – tested 10/12/2020 – 16/12/2020
Risa’s comments:
BMS was cutting out at I think ~17.4V
/6 = 2.9V per cell
full charge cut out at 25V
/6 = 4.166V
18.46Ahr / 5 = 3.69Hhr per cell
Battery pack B – tested 25/11/2020 – 30/11/2020
Risa’s comments:
BMS was cutting out at I think ~17.4V
/6 = 2.9V per cell
full charge cut out at 25V
/6 = 4.166V
17.6Ahr / 5 = 3.52Hhr per cell
Results
| Battery pack A | Battery pack B | Sum | |
| Test length | 27h 1m | 28h 09m | N/A |
| Ah max | 18.46Ah | 17.63Ah | 36.09Ah |
| Wh max | 402.38Wh | 384.23Wh | 786.61Wh |
| Ah per cell | 3.69Ah | 3.52Ah | |
| Weight | 2.487kg | 2.487kg | 4.974kg |
Having both batteries ready we should be now handling quite reasonable 36Ah. Provided that I estimate peak consumption to be 40A, we should be able to go up to 50 minutes full speed with our Jet-cart now! Let’s say that we’ll go 1/2 power average, we can probably go for almost 2 hrs.
I think this is a good start and reasonable promise that we’ll be able to put together enough power (with reasonable power/weight ratio) to make it to another stage!
I’ve asked Risa to provide his summary on all this, so take this paragraph as a placeholder for Risa’s epilogue. 😉
