An Electric Scooter Community on a Mission to Stamp out Transportation Mediocrity.

Store the power! Electric scooter battery and charging discussions go here.

By IamPurple
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#14968
Okey, cool. But would still like some clarification To view images REGISTER or LOGIN for full access.

The stock batteries BMS will cut off charging at 41.5V while the aliexpress batteries charge up to 42V, even though both batteries are technically 42V

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By LAskooter213
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#15288
Half a volt aint gonna blow nothin up. Dont worry about half a volt. And trust me, if the batteries are in parallel they WILL CHARGE TO THE SAME VOLTAGE. I promise you. If you keep the BMS boards active on both batteries, I cant tell you what will happen. The batteries are not truly in parallel in that case since the BMS is wired in series with the battery and therefore can interfere with the properties of the battery charging. How it changes thingst depends on the board. Personally, I dont use the BMS in my builds. . I have a smart charger and I rely on that to charge safely. But thats just me.
Even if it is safer, I say fuck it to a BMS. I dont like shit that stands in the way of my customizing, The hell with the added safety.. I dont like cars with ABS or airbags either. Im driving a 54 Chevy Bel Air and a 64 Impala SS. And guess what?.... I havnt died yet. In fact I would say Im pretty damn good at living in the danger zone. 38 years and counting.....
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By Skyexbluu
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#15779
What do you mean by bms active on both ? I have put external battery on different es2 without knowing they needed to be charged at same% before connecting...
What happens?
How should i do it?
Do they have to be same firm? To view images REGISTER or LOGIN for full access.


By shibby78787
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#25834
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Quick Question about this. I wanted to try and prevent power from one charger going into the other charger causing a master/slave power supply issue. So I've connected the output of power supply in parallel, but I also took two input cables(A/C side of charger and wire them in series as wall connector black wire goes to black wire on 1st input cable. on same input cable the white goes directly to black wire of 2nd cable. second input cable white wire connects to wallout white wire. )wondering if any potential issues that may arise? i have made one already and thus far has worked perfectly
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