BMS bypassed with loopkey and discharging with lights/accessories circuit
If your BMS doesn’t have C- or CH-, then connect that wire to P-
As given by b264^
Okay, everything is wired up! Is there a way I could tell that it is charging using a multimeter or other method?
You would just plug in the charger if everything is correctly done. Did you add a fuse to make sure nothing goes wrong? Its a safe bet, but if anything, the bms would not allow charging if its not set up correctly.
Your charger should be showing charging led if its good. If not, it will stay green (or any color that shows fully charged) and you’ll need to check the balance leads. Make sure it goes from 3.7v to your series voltage. Also check if its not fully charged. That’s also a factor.
Okay, so when I plug it in the charger LED stays green and doesn’t change color (so no charging). I’m pretty confident the B-, C+, and P-/C- are wired into the correct spots, but I think my b1-b13 are incorrect.
They are wired as stated with the first black balance lead on my b- battery on the rightmost side of the connector(if looking at the image of the bms it is on the “-” side on the right end) which should be b1 correct? Then b2 is the next wire on the first battery continuing onto b6 (moving to the left along the connector with each successive one). Then I skip the first black balance lead on the second battery and continue connecting the rest of b7-b12 with b12 being the red balance lead. Finally, I tried having the red lead on the first battery not connected, but this didn’t charge and so I connected it to b13 and this still doesn’t charge. So this is where I’m a little lost. I know these are wired up incorrectly, but I don’t know what’s wrong.
If I measure the voltage across the wires (one end of the multimeter will stay on the b1 wire for now) b2 = 3.3, b3 = 6.8, b4 = 10.3, b5 = 13.8, b6 = 17.3, b13 = 20.7,
Then I switch to the multimeter to be on b7 because otherwise the rest stay as 0. b8 = 3.3, b9 = 6.8, b10 = 10.2, b11 = 13.5, b12 = 16.9.
I don’t know what’s wrong and any help would be greatly appreciated!
It’s B0 - B12.
B0 is also called B-
So you say you have
B0: 0V (B-)
B1: 3.3V
B2: 6.8V
B3: 10.3V
B4: 13.8V
B5: 17.3V
B6: 20.7V
B7: 0V
B8: 0V
B9: 0V
B10: 0V
B11: 0V
B12: 0V (B+)
That means you have a broken or missing series connection in the battery, if I understood you correctly. Are these lipos?
BE CAREFUL WORKING ON BATTERIES, THEY ARE EXTREMELY DANGEROUS.
Yes, these are LiPo. And, I actually connected the red lead from the first battery into b12 according to your numbering. Would it be correct to assume this is the problem, and I need to switch the leads around so they correspond to the correct numbers as from your initial instructions?
Also just to check, is B0 the 12 AWG wire or the 20 AWG lead on my first battery?
No, never assume anything unless you want lots of fire
How would you suggest not getting lots of fire?
It looks like this large gauge series connection between the two lipos is missing.
Some BMS have a B0, some don’t. Some are B1-B12 and some are B0-B12. B0 is B-
Measuring the voltage of two wires before you connect them together. If it’s not 0.0V then don’t connect them.
Okay so if mine has 13 spots for connection then that would mean I have a B0-B12 correct? So then the new way I need to wire up is as follows:
B0 = First black lead first battery, B1 = Second Black lead second battery, … , B6 = Red lead first battery, B7 = second black lead second battery, B8 = third black lead second battery, … , B12 = Red lead second battery.
Would this be correct?
No.
Do not connect the “little” B6 wires together, those should be connected with the “large” sized wires on the main output, the battery series connection. (This prevents you from accidentally melting something)
Okay, so I’m stupid. When I was measuring voltage across the leads I had disconnected everything in my circuit and so my batteries were no longer connected in series (by the big 12 AWG wire they were connected with before). So I plugged this in so they are now connected with the big 12 AWG wire and I’ve also redone the b0-b12 and these are now the voltages I measure. I still don’t think charging is working because the light on my charger is still green when plugged in and does not change color. These are now the measured voltages:
B0: 0V
B1: 3.3V
B2: 6.8V
B3: 10.3V
B4: 13.8V
B5: 17.3V
B6: 20.7V
B7: 24.1V
B8: 27.5V
B9: 31.0V
B10: 34.4V
B11: 37.8V
B12: 41.2V (B+)
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If you really want to track your batteries (Not sure if the Daly BMS has bluetooth or the other functions in this one) you can go with a LTT smart BMS. You install the app, set the values and your able to track your voltage, helps out with charging as well since you can set a value and when it reaches that value it releases a trigger point to prevent your batteries from overcharging or if it does go over the voltage, you can manually shut off the charge port via the app. Basically it makes sure your batteries don’t get messed up, especially Lipos. Keeps the cells balanced and alerts you if a problem happens. I got a Lipo setup as well and this BMS has been going great. I got a wiring diagram if your interested
(This one is designed for 12s, hooking it up is the same)
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It’s supposed to be b0, which is b- and it starts at the negative terminal of the battery (first balance lead). Then it goes from b1-b6 on the same battery leads before you move to the second side. You must remember to skip the first balance lead on the second side since that will be b0 as well. You do not need it after b6. Your last wires should be done accordingly and end on b12, at the positive side of the terminal.
Sorry, I had to correct someone’s grammar and the guy got mad for it and locked me out. All good though.
I’m still confused because I think I wired it corresponding to what you’re saying, but it’s still not charging. I’m just gonna guess that I did some aspect of it wrong. So, I attached an image of how it is currently wired, and if you could tell me what part is wrong that would be awesome!
I’d love to see the wiring diagram thank you!
I attached a wiring diagram of how mine is currently setup if this helps in identifying the problem.