Very Nice!Hello,
as promised the source of Chargery BMS driver for the Venus OS devices: https://github.com/Tobi177/venus-chargerybms
I will add more documentation if I will find more time.
Bye
Tobi
I use a raspberry pi with this USR IOT rs232 to ethernet converter. I am willing to share code and make some instructions. Im not so good at Videos lolProbably a dumb question ..... are there devices other Raspberry Pi that use the Venus OS?
Would one of you knowledgeable guys consider doing a YouTube video of how to use that driver to get data into a computer and view it?
I use a raspberry pi with this USR IOT rs232 to ethernet converter. I am willing to share code and make some instructions. Im not so good at Videos lol
The Blue Sea 7713 does have this behavior. I've done some brief bench testing here, and had a short conversation with Blue Sea tech support. The power for the latching actuation comes from whichever of the main power leads at one of its base terminals is active. Doesn't matter which. Now, even when the latch is released there is a small current draw between the active power lead at the base terminal and ground via the black (ground) wire from the internal controller. So, to completely turn this relay off and remove any parasitic draw while away for extended periods, one must also ensure that the black lead from the 7713 is disconnected from ground. Not having the Chargery BMS in hand (China deliveries from FedEx seem to have fallen into a black hole at the moment) I cannot say if simply unplugging the power lead from the BMS will open this circuit or not. If not, of course, a simple in-line switch should accommodate. It would be friendly if simply unplugging the BMS would also kill any parasitic loads from the 7713. Does anyone using the Chargery know the answer to this? I will follow up when I recieve my BMS and have had a chance to test this feature.
The Blue Sea 7713 does have this behavior. I've done some brief bench testing here, and had a short conversation with Blue Sea tech support. The power for the latching actuation comes from whichever of the main power leads at one of its base terminals is active. Doesn't matter which. Now, even when the latch is released there is a small current draw between the active power lead at the base terminal and ground via the black (ground) wire from the internal controller. So, to completely turn this relay off and remove any parasitic draw while away for extended periods, one must also ensure that the black lead from the 7713 is disconnected from ground. Not having the Chargery BMS in hand (China deliveries from FedEx seem to have fallen into a black hole at the moment) I cannot say if simply unplugging the power lead from the BMS will open this circuit or not. If not, of course, a simple in-line switch should accommodate. It would be friendly if simply unplugging the BMS would also kill any parasitic loads from the 7713. Does anyone using the Chargery know the answer to this? I will follow up when I recieve my BMS and have had a chance to test this feature.
Must have driven near / past your home during a recent visit to the park ! Lovely part of CA.Yes I am running my home, i'm off grid "deep" in the woods near Algonquin Park Ontario.
@Picasso one BMS per pack, you cannot share a BMS with 2 packs. Each pack is a separate & independent entity. You don't; share your living room with your neighbour do you ? such shortcuts will only provide problems, costly ones too.
This isn't necessarily a Chargery question maybe move it to general BMS advice. I don't use those batteries so I can't properly answerHad a few Chargery BMS tuning questions - realize these are application specific.
(Note, my normal loads are in the neighborhood of 0.02C to 0.04C. Very low. Maybe 15 to 30 minutes / day they'll hit 0.5C or .6C and even then they'd most likely be broken up. 95% of charge energy will be from solar and might hit 0.2C at mid-day full sun.)
1. Can anyone here offer setup suggestions for cell voltage differential on a 4S 280Ah pack?
I set mine for 75mV. I saw 40mV delta during a sustained 150amp draw @ 50% to 60% SOC. At steady state, my cells are within 10mV. I poked around this site for recommendation, but didn't see much.
2. Seems like greater V differential tracks C - rate? Does it change closer to the knees?
3. How do you setup your time delay for events which disable the pack? I have mine set for 15 seconds. I figured this would accommodate a surge load by my 2800W inverter. Is this too long?
4. How about safe temp delta (I'm using F)? So far, I have yet to see more than 1F.
Thanks!
Steve, what is the name of your Youtube site?Some handy videos:
There are more if you look but these are interesting
How to calibrate Chargery BMS Shunt (BMS8T, BMS16T, BMS24T)
Chargery C10325 Charger Unit
Personal Thoughts on Chargery BMS by DevilsDestiny on YT.
Part-1
Part-2
That is one of Will's videos. I do NOT do YouTube or Faceblot etc...Steve, what is the name of your Youtube site?
12V is not enough for the BMS as indicated in the doc's, 15-30V @ 3A is what the BMS needs.Thank you Steve!
Just a couple questions if you don't mind.
The 4s+4s interests me as I'm looking to stay 12v. In this case I'm assuming both batteries would be protected behind the same pair of relays but they would have better monitoring and balancing vs a single 2p4s battery layout?
Is external power really required on a 2p4s or 4s+4s battery? Is the 12v not enough?
Thanks again for your time and efforts working on these manuals.
12V is not enough for the BMS as indicated in the doc's, 15-30V @ 3A is what the BMS needs.