jmetric wrote:you wrote:If a cell goes out of spec the normally conducting loop goes open circuit so you can use this to release a relay which is indicating green/red up on the dash, or sound a buzzer.
Voltron, I would like to build a simple top balancer or really a top discharger. I would like to set a setting or hardwire in a voltage like 4.100V and have a unit that
when the pack is full it would slowly drain all the cells down to 4.10V
this little board can trigger a relay, so I suppose it could trigger a relay on that cell to put it across something like a 4watt resistor?
Can you see that working with that system?
Rube wrote:Awesome, so much power in such a small form factor. Like all of you batteries I wish my current setup could accommodate the dimensions. Lesson for the next build. Are the enclosure bolts M1?
nuxland wrote:I'm very tempted to make myself another lightweight pack for my go-kart. But I was thinking of 28s6p variant. Right now I'm using ~20Ah in 10 laps of racing and 6p will give me 30Ah, so using 66% of the pack will be good for the pack 28s because I want to get maximum rpm without using field weakening so as much as my Sevcon can handle 119V And 6p will not get hot also with 300A-600A current, because it's only between 10C to 20C
For the cells alone it would be around 28x6x16$=2688$ (I assume australian dollars?) Can you give me rough estimate about other stuff I need.
It's a pity I can't order less than 500 cells from China myself, cos I only need 200pcs.
For the BMS I would use zeva, but as one can handle 12s then I need 3 of them.
In my kart I have room for 500mm long and 227mm width pack. So it would be 2 rows of 14s6p. I would be then 344mm in length and 206mm width. So I will have 156mm left for bms and dc/dc and olimex and display and etc.
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