Little successess thrill us simple folks! I just learned how to multi quote! Whooppee!
jondoh wrote:Having worked for JST ... the XH connector ... was never meant for more than 30 mate/unmate cycles. << That needs to be chiseled in stone! I would recommend the SM series with gold plated contacts.
^^^Great advice johdoh! Thank you for posting that info!
John in CR wrote:Bigmoose, With you on task I believe we'll finally get a BMS that I can trust enough to use.
Thanks for the confidence John. But this was an effort by Jeremy and I to get out in front of us all data on where the actual failures are in the field and in use.
Also to help Alan B in the design of his BMS, his thread here: viewtopic.php?f=14&t=22378
I also liked CamLight's recommendation of using the TI line, particularly TI's gas gauges bq78PL114 and bq76PL102. I have not had direct personal experience with those chips, but starting to read up on them because of CamLight's recommendation. (I have a LOT of respect for his tips, advice and observations!) TI is pretty good at these things, and one feature that caught my eye is that the above mentioned chip line is smart enough to go into standby mode after announcing the LVC and drop the chip power consumption to a couple of micro amps. That feature would design in the solution to another noted failure mode in our poll.
Also methods has had success developing a BMS around the LTC6802-2 chipset. His thread is here: viewtopic.php?f=14&t=6602&hilit=bms&start=255
GGoodrum has been the spearhead of BMS development, I believe this is his latest thread: viewtopic.php?f=14&t=17168
I am "noodling" on a 2 cell BMS for a product retrofit... but I am not there yet.
So, hoping that this data might help all BMS designers on the sphere!