Would scissors work?
Hard to control. You might take off too much. Nail clippers are better.
1 Like
once u heat the solder, it becomes soft, so u can push it in
cut off the pre tinned wire, twist and re tin it yourself to make it thinner
Alright so. Gotten the battery harness done a while ago, about to solder my BMS later today, need help knowing where does the charge port go but here’s my lineup, based on your directions, let me know if I did it correctly
Yep their 5S, I made a harness that connects them in series, just need to know how to solder the charge port, I lined up everything last night based on the directions @mutantbass told me
Been lurking for a while, and I’ve followed the OP guide with much success for 6S and 12S now (2x3P, 2x6P and 3x4P). Cheers @mutantbass!
@Red_souls just hit BMS read, then for the basics:
- set “number of cells” to whatever you’ve got (looks like 10S for you)
- set “total battery capacity” to the full capacity (looks like 4500 for you)
- set “total cycle capacity” to 80% of that (e.g. 3600 for 4500mAh)
- “cell full voltage” to 4150 mV
- “cell min voltage” to 3500 mV
There are some other settings you’ll probably want to change but that’ll get you started.
Oh yeah and make sure C- is connected to the battery before you plug in the balance wires or the BMS will get confused about the cell voltages. I did that and just unplugged everything and tried again and it was all good.
Also if you haven’t wired up a fuse to the C- wire do that! I blew one with a stupid mistake but better to lose a fuse than blowing up the BMS.
2 Likes
35 is too low. Most likely will be set at 37 for min. And yea i did, got a 7.5a fuse since I’ll be charging at 1c (4.5a) thank you for the simpler explanation!
1 Like
Actually using 3600 for min voltage. Don’t really want to get below that and yeah start throttling down at 3.7V in the vesc.
1 Like
Yea basically if i end the ride at 37, it’ll most likely round close to 36, putting less strain on the cells from charging from such a low voltage, which I founded out that even 36 is considerably close to the “danger zone” 37 is more safer to stop at, shoutout to @b264 for explaining it better earlier on, so does cycle capacity mean how many times the lipos been charged or its a whole different meaning? That was one of things i didn’t understand on the app
1 Like
Are you asking about cycle count, or capacity decline, or both?
2 Likes
Great work!
Right i have measured my jst connections with a multimeter. from the right the first red wire is 0v, continuing across to the last wire which is 25.2volts. Then moving onto the next jst connection on the left, the first red wire is 0 volts ( so im guessing this is the one we dont use? ) then all continuing in positive voltage up to the very left connection of 50.4 volts
so im going to this BMS with these:
the redundant wire i am guessing is the 0 volt red one on the second (left) pack?
Many thanks 
1 Like
for bms I like the charging-only version, because this is the feature I need most. But the balance charger cannot replace it.
Got a question about the Xiaoxang BMS app, buttoning up the settings on my first build. Running two 5s lipo batteries in series, not sure if I put everything in correctly, I read the original settings set and changed some values as well. Just making sure before it warms up so I can finish my diy deck and take this thing on the road
1 Like