Daly BMS thread

Soon after posting, I looked at a BMS wiring diagram and then it dawned on me that an E-Switch would be unnecessary. Thanks for the confirmation.

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@BenjaminF i have a daily 20a common port bms. I have it working by installing it between the battery- and vesc-. Would this be bypassing the discharge or no? These common port bms confuse me.

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For bypassing, the VESC shouldn’t be connected to the bms, but direct to the battery.

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Common port just means everything flows in and out the same area for the BMS. So both the charger and the vesc would be through that wire if you’re using protected discharge.

Unless you have a direct connection from the VESC/AS to the battery it is not bypassed.

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Can you guys point me in the right direction for bypassing this guy? A simple diagram would work. Or just tell me where to put the bms p-/b-
my charge and power wire are the same wire to the battery.

Are you guys saying to just tap the bms into the -lead?

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B- is battery negative
P- goes to charger/esc

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@A13XR3 that’s exactly how I have it wired now, but people above you are saying that is not in the discharge bypassed mode… I’m very confused

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This is the charging circuit, then you have to connect the battery to to VESC directly.

Bypassed means power is going direct from battery to esc. If the discharge current is flowing through the bms it is not bypassed.

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So I need to run a +/- From battery to vesc. Then where do b- and p- go from the bms? Both to the - battery cable? @Tamatoa @A13XR3

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BMS circuit completely separate of the esc circuit. Straight off battery for the esc and charge loop through bms for charging only.

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Its It’s bit of a cluster fuck but here is what I did,
Thick wires go directly to the VESCs and smaller ones go to the BMS/charge port.

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This is much more cleaner.

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Thank you @Tamatoa I’ll have to redo my bms wiring. My charge wire is Also my positive lead, so I’ll just add a ground from vesc to battery. Thanks guys!!!

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I just finished wiring mine yesterday, and I recommend using a fuse. I messed up the charge port soldering (damn thing is so tiny). I plugged the charger and it worked but there was a pop :boom: when I pulled the barrel from the charge port. There were burned mark and the fuse also popped. I installed a XT60 and it seems both the battery/BMS and charger are working. :sweat_smile:

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did you go with the cheap fuse holder? we are still lacking a good solution imo.

oh I see it nvm

I want something with a screw cap. and maybe smaller but preferable exteriorly mounted

you gotta dig your fingers or tools into that mess and maybe tug wires so I don’t much like

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Yes I have a bunch I bought long time ago, I cut the cables and replaced with silicone wire but not the best I think. I am hoping the nerd squad will come up with a neat solution I can purchase soon. :laughing:

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This bms is being used on a onewheel. There is no way to use a fuse on the charge port without fusing the main lead. I have fuses on all of my eskates charge ports for sure. Also why the common port bms wiring was a little strange to me.

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I think using wrong size cables didn’t help either :rofl:

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I am curious to how it looks inside one of those, if you don’t mind posting a pic while it’s open