Two things: First, you canāt use a 10s BMS for a 9s battery unless is specifically says it can do multiple different cell numbers (Hint- most cheap ones canāt.)
Second, you would remove the fourth wire on the first two sets of balance leads - That is, if you have ground, 1-2, 2-3 and positive on each pack, then your arrangement should be ground, 1-2, 2-3, then ground from pack 2, then 1-2 from pack 2, 2-3 from pack 2, then ground from pack 3, and so on, ending with the positive from pack 3, for a total of 10 wires.
second question: Yes, but. You can still use regen braking, but just set your current limits at safe and sane levels (max regen of -12A or so) and donāt try to go down a long or steep hill when your cells are at or near 100%.
So, do both batteries show the same reading on each device? As in, If you plug pack 1 into the charger and get 26%, and then plug pack 2 into the charger, is it also 26%?
If the answer is yes they are the same, then the difference is your charger and meter have different settings for the cutoff voltage used to calculate state of charge. The meter is probably calibrated for li-ion, in which āemptyā is at between 2.5 and 3 volts, whereas your charger is calibrated for li-po, where the āemptyā voltage is more like 3.7 or 3.5. This leads to a shifting of the apparent state of charge.
Iād recommend not running those cells down below ~30% on the battery meter, since that would be getting close to ~3.7v. (You can experiment and figure out exactly what percentage on the meter corresponds with 0% on the charger if you want.)
I have an eye on this 60A BMS:
www.aliexpress.com/item/10S-36V-Lithium-Battery-Protection-Board-BMS-with-Balance-Waterproof-18650-Lipo-Li-ion-16A-25A/32950961252.html
I contacted this seller regarding my 9S-10S problem and he answered this:āYou can just order 10S 60A same port.
the wiring of 9S is connect 10th and 11th red small wires together to B+ā
So with this Iāll be able to crank up the regen breaking power if I donāt bypass the BMS right ?
Also should I get a BMS with combined port or seperate Port ?
Whats the difference anyway ?
The seller would not be the one to ask as they are just trying to sell the item. This bms is very cheap so I would say donāt use it for a 9s battery.
I have an IMax Charger and I already drove a few times and charged my board with itā¦so that works. But I fried a Cell as I tried to charge with my BMS board.
Could probably be the wrong balance wireingā¦Iāll check as soon as I get home.
Nevertheless I like the Idea to have my Battery balanced all the time and just plug it to a charger without opening the battery compartment.
I also know Bestech from this forum.
So I would go ahead and buy this http://www.bestechpower.com/333v9spcmbmspcbforli-ionli-polymerbatterypack/PCB-D345.html as its a bit smaller, But how/where can i order it ?
Thanks again for the support
If Iāve got a bms with a common charging and load negative wire like this:
Will there be any problems? Most bmsās Iāve seen have the negative charging wire on a
separate terminal and Iām guessing thereās a reason for that.
For the record, Iām not wiring up my own battery by myself.
I obviously donāt know how to do that and i know that batteries can be very dangerous so Iām not even going to attempt that.
Iām just trying to find a reasonably priced bms thatās available locally for my battery guy to use.
Itās not unheard of for the charge and discharge to be common like that. As long as you wire it according to the instructions it comes with and use it within its specified limits, you should be fine.
Itās from Hyperion so itās immensely protected. Board is still in assembly. Didnāt take into account I still have to anchor the battery down which will add height that may cause more contact with the button.
Iāll take Sn4pz adviceā¦always a work around. Thanks!
Will there be any problems? Most bmsās Iāve seen have the negative charging wire on a
separate terminal and Iām guessing thereās a reason for that.
Iāll take Sn4pz adviceā¦always a work around. Thanks!
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