Recent content by VietJr

I pulled the PCB files from your GitHub a few months ago. Was just curious to see if they were for any real calculated purpose, as I couldn't really think of a purpose for them other than potential heat dissipation

Hey ENNOID, A question regarding your board layout for the LTC slave boards, what is the purpose of these 'islands' on the nodes of your discharge resistors? Are they there for heat dissipation somehow? They aren't exposed copper so just curious as to why they're in there on all the slave...

Yeah please share the BOM on github for the Master and LTC6811. What can I help with for the Master? I'd be happy to give the build a try for testing if that's what you need.

I see, thanks! Is there a bill of materials I would be able to access? Or would the materials list be contained in the schematics/PCB files?

Hello ENNOID, Recently found this thread and I found it super interesting, thanks for your work! I just had some questions, as this system is more complex than anything I've learned about in school. Why do you use both the LTC6813 and LTC6811 chips as the slave chips? Do they serve different...

If the chargers are isolated, would there still be any problem connecting them to a single supply? Also, if you had two chargers, is there any benefit from connecting each of them to half a battery pack versus connecting the chargers in series and charging the whole pack? Seems like you would...

Thanks! We are looking at a few of these right now.

Will do! We're mostly just establishing our goal priority for what needs to be on the bike versus what would be pretty cool/interesting to have on the bike. So micro-optimization is definitely a stretch goal for us. Thanks!

The cells we're planning on using probably won't need to be actively balanced or managed on the track. To my knowledge, Lipo cells are quite good at staying balanced if they're balanced initially. Our BMS will do more monitoring than managing. We'd like to record basic parameters like...

Sorry for the (very) late reply. Never got a notification that you had commented on this thread. If you're still interested I will link my team's website. At the moment I'm updating my team's website to include this project. The goal is to race it in New Jersey at the eMoto Varsity Challenge...

Hello EndlessSphere, I've been pretty interested in the electric racebike scene, reading a few of Chris Jones threads, along with Ripperton, Zero, Brammo and a few varsity teams such as Team RIT or EMUS. I'm wondering how they go about calculating the battery capacity they need for a race...

Thanks for the help billvon!

Just under 400V, about 384 V. Interesting idea, kind of like putting chargers in series/parallel then? I guess the idea is pretty similar just in reverse to supply low voltage from high voltage supplies instead of using multiple low voltage supplies to charge a high voltage pack.

Hello there! Just wondering if you have any recommendations for high voltage DC/DC converters. Looking to step down ~400V to 12V if possible to power some smaller electronics for my electric motorcycle design. Power consumption shouldn't be too heavy, I highly doubt it'll exceed 200W, but most...

I'm weighing options at the moment, but the multi-charger setup you suggested seems the idea to learn towards. The cost wouldn't be as high and I can also shift the complexity away from the bike so that's always a good thing. I'll post my progress here after choosing some chargers and building...