Scottietheyoung
Member
- Joined
- Oct 10, 2018
- Messages
- 79
ajw22 said:Another quick update:
* Noticed a few days agothat Battery#2_Pack#11 wasconsistently ca0.05V lower. Log indicates this drift started about 2 weeks ago, getting worse every day => there's aleak! Visual inspection found only 1 obvious candidate, which I replaced. Took all in all about5 min.
I thought about boosting the pack up to the same voltage as the other packs, but decided to see how the 50mA balancer would deal with this.
At 3.8V, itwas leaking at a rate ofabout 30mA. A more powerful balancerwould have hidden this problem?
* Built the firstrack, anchored to the concrete floor and wall.Moved battery#2 (14S104P) into rack today.
* Still under constructionbattery#3 nowhas all its cells. Fused pack#1, 13 more to go! Before anyone comments about the cold solder joints: it's a very localized quick high temperature solderingandit's rock solid.
This latest design iteration uses just one long 5.5mm^2 wire as the busbar. Plenty for my max 30A use. Removing the insulation is a 1step process, and no more twisting orsplicing. And it's well secured to the pack, no chance of accidentally ripping out fuses by pulling too hard on the connector.
just amazing stuff mate! LOVE the design and thrilled to be able to utilize it (thanks so much for sharing)
first print has lots of bridging. have removed them from half of the battery holders as in the pic and working on the other half now.
Cant wait to get the printing sussed so i can continue to produce these units.