Electric Scooter Forum for Scooter Enthusiasts, Scooter Chargers, and Scooter Mechanics.

Discuss the Xiaomi mijia mi M365 original and pro versions in this forum. Topics include hardware, software, hacking, riding, and everything in between.

By galstaf
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#11635
TJSplash wrote:
Sat Jun 08, 2019 10:19 am
That is a really interesting setup you have there, four wheels, One Bluetooth circuit board for the back 3?
Yessir... Just solder the four control wires from the bluetooth board into each of the ESCs .. so each wire goes to 3 ESCs.

Works fine as long as you don't try to connect a phone or anything... so the ESCs all have to be firmware modded in isolation and then connected after the fact.

The use a physical power switch to cut power off from each battery to shut it down. Clunky but you don't need to get any third party parts

By galstaf
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#11636
TJSplash wrote:
Sat Jun 08, 2019 12:11 am
galstaf wrote:
Fri Jun 07, 2019 11:47 pm
Ooops.. forgot the pic... this is a Jump battery if you have never pulled one. Not sure of the capacity.. it doesn't really say and I couldn't find anything googling the company. I would say it is about the size of a zero battery so perhaps similar capacity but lower voltage.
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I've always been interested in their batteries, I think its interesting how it does give a standard current. Have you opened it up yet?

Not yet... extensive looking BMS and all set in a aluminium case. Very well made by the look of it.

By galstaf
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#11637
365GUY wrote:
Sat Jun 08, 2019 6:27 am
What exactly do you have there with 3 motors connected together?
As far as the batteries go there are a few different options you could go with. Let me put some thought into it once I get some sleep To view images REGISTER or LOGIN for full access.
3 wheel scooter with pivoting back wheels... It is stupid fast and aggressive... also too heavy. So going to convert it to two wheel drive when I get some time to tinker. To view images REGISTER or LOGIN for full access.

By galstaf
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#11639
galstaf wrote:
Fri Jun 07, 2019 11:38 pm
Hey Chaps.... reading the thread with interest.

I have been looking at the Jump bike removable batteries. They are a pretty good size and rated at 36V so I was looking at what it would take to wire 2 of these together to make a 72V pack to power a 72V ebike build. I will attach a photo as I don't see much info on them on the forum (I know this is not exactly a scooter.. but oh well To view images REGISTER or LOGIN for full access.
)

From what I have read the built in BMS's on each of these may have a shit fit if you try to wire them together... so have any of you built a higher voltage pack and how did you handle charging it? Is there a way to retain the stock BMS's somehow, or would I need to scrap them and figure out something else?

I am also looking at wiring 2 x the M365 packs together to make an 84V pack to act as a supplementary battery for a Kobalt 80V electric chainsaw. It has an 80V battery but it is only good for about 15minutes of moderate use.
Same issue... I am a novice with the battery/BMS stuff and would love some guidance on how to wire these up and how to charge them... could I use two bird chargers still or would I need to get an 84V charger?

Could anyone recommend a good source of education on this stuff on Youtube. There are a lot of idiots on there... I need someone that is good at explaining this stuff and really knows their sht. Please share your findings... and of course I will post my results when I get something worth sharing. To view images REGISTER or LOGIN for full access.

Hey all... does anyone have any feedback for me on this? Anyone else trying to connect packs in series?

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By TJSplash
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#11651
galstaf wrote:
Tue Jun 11, 2019 1:02 am
galstaf wrote:
Fri Jun 07, 2019 11:38 pm
Hey Chaps.... reading the thread with interest.

I have been looking at the Jump bike removable batteries. They are a pretty good size and rated at 36V so I was looking at what it would take to wire 2 of these together to make a 72V pack to power a 72V ebike build. I will attach a photo as I don't see much info on them on the forum (I know this is not exactly a scooter.. but oh well To view images REGISTER or LOGIN for full access.
)

From what I have read the built in BMS's on each of these may have a shit fit if you try to wire them together... so have any of you built a higher voltage pack and how did you handle charging it? Is there a way to retain the stock BMS's somehow, or would I need to scrap them and figure out something else?

I am also looking at wiring 2 x the M365 packs together to make an 84V pack to act as a supplementary battery for a Kobalt 80V electric chainsaw. It has an 80V battery but it is only good for about 15minutes of moderate use.
Same issue... I am a novice with the battery/BMS stuff and would love some guidance on how to wire these up and how to charge them... could I use two bird chargers still or would I need to get an 84V charger?

Could anyone recommend a good source of education on this stuff on Youtube. There are a lot of idiots on there... I need someone that is good at explaining this stuff and really knows their sht. Please share your findings... and of course I will post my results when I get something worth sharing. To view images REGISTER or LOGIN for full access.

Hey all... does anyone have any feedback for me on this? Anyone else trying to connect packs in series?
Check out the post on overvolting


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By LAskooter213
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#11659
Yes, you can wire your packs in series. BMS may interfere. Try it. See. If it does, simply remove it and only us it when charging. Connect your two 36-42v packs with a reuseable connector so you can separate them and charge them at 42 volts. That way you dont need to buy any other chargers.

By galstaf
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#11661
LAskooter213 wrote:
Tue Jun 11, 2019 3:29 pm
Yes, you can wire your packs in series. BMS may interfere. Try it. See. If it does, simply remove it and only us it when charging. Connect your two 36-42v packs with a reuseable connector so you can separate them and charge them at 42 volts. That way you dont need to buy any other chargers.
understood... trying to keep it simple tho.

just wanted some feedback for anyone that has done it before so I don't destroy anything.

any recommendations on good training videos for something like this?

cheers
gal

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