Hi i have recently posted about 6s lilo BMS and i got told to snip the positive and negative wires off the balance lead on the battery which i did and worked fine however when i connect the battery one of the chips smoke when i connect the balance lead why may this be
Did you connect it correctly/ I cannot get a thing out of your description and pics… but I just burnt one bms too by accidentally contacting the wrong pins…
Yes i connected them correctly how they are supposed to be . if i push balance cable in from the lipo no smoke if i put the main red and black in no smoke however when i push all of the connectors in the one chip smokes i have tried this on both circuit boards i have
Do you still think they will work at all now? Since they gave off the smoke…
I believe there is a short circuit… which is happening in the circuit… just not sure why you have it… do you have some of datasheet or wiring diagram for it’?
Im not sure but are you really supposed to connect both leads to the circuit? Im actually not that good with bms… but I undestand there are balance wires you need to connect and then there are main leads you need to connect…
–
If it is a balance connector which is put inside when the smoke starts to come off… I would guess the + wire and - wire have been switched sides… This happened to me a few times when I made balance connectors… but im not sure who would install the connector ‘‘upside down’’ for you to install in the wrong way…
From your description I assume you connected the wrong balance lead to the circuit… they are the most easiest to mess up… since they are also colored…
So which color wire is the ‘‘first’’ one?
First one have different polarity from the rest of the balance wires…
No balance connector only goes in one way if you look at my other posts you will see that my balance plug on the battery had 7 wires and the BMS only had 5 two of the 7 wires were red and black i got told to snip them as they wont be needed due to using main leads to charge the battery however i am starting to think that is why … But then where would i put the red and black to as there are only 5 wires for the balance bit which would be the individual cells
uhh I really need to take a look at your bms board…
im not sure what B0 stands for in your bms… but I think it should have been the - wire which needs to go first… I will check this once again I get back to my board… I dont remember in which way the polarity went…
There’s a likely hood you cut the wrong wires without checking the polarity… just messed it up when plugged into the bms as the incorrect wires were cut or they needed to be in ‘‘different formation’’
Ok here is the link to the BMS i have http://m.ebay.co.uk/itm/25V-Protection-Balance-Module-BMS-PCM-12A-For-6S-22-2V-Li-ion-Li-Po-Battery-/322317909787?nav=SEARCH
I think you did not carefully check the connections. If u had multimeter u could check them.
How would i check it with my multimeter but i have wired it up the way other people have told me only other think is i need to check which way the balance plug is wired but i prosume its the same way
Once i get to see some lipo pack i can tell. Im running li ion now. So i have to look up how i wired it up.but thats for tomorrow
Ok will report tomorrow (unless someone steps in and clears up this bms smoke thing)
No worries thank you so much for the help really appreciate it!!
Which chip smoked? If it is a resistor u can easly replace it… otherwise not so cool if it is charge regulator with many pins…
From what i understand u should have connected only charge leads and battery (balance leads) …no main leads but will see tomorrow im stil not sure which 5wires you connected… in theory there should be no short if these were the middle ones…
You shorted your battery. The BMS burnt because that is the point with the most resistance.
You should NEVER EVER EVER have a male plug on a battery. I suggest you do tons of research before blowing the battery up…
What do you mean by i shouldn’t have a male.plug on a battery