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Using e scooter batteries for powerwall
#1
Hi guys. My recycler can get me an ongoing supply of used e scooter battery packs. They are the Eve brand battery with 20 in a pack, around 2500mah per battery. Has anyone used these packs for a powerwall and connected them up. They are not easy to break apart so interested if they can be used still joined up.

Cheers

Paul
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#2
(01-23-2020, 10:19 AM)Longbush Powerwall Wrote: Hi guys. My recycler can get me an ongoing supply of used  e scooter battery packs. They are the Eve brand battery with 20 in a pack, around 2500mah per battery.  Has anyone used these packs for a powerwall and connected them up. They are not easy to break apart so interested if they can be used still joined up.

Cheers

Paul

Yes you can.  Here's youtube from @jehugarcia where he creates a busbar to plug them in  'as is':    Simple DIY Powerwall using $1 LG 18650 eBay Cells - https://youtu.be/g7V9XQ34chc

The problem with 20cell  e-bike packs is their 36v (nominal) voltage range - which limits your choices for charge controllers & inverters.    Things are just 12v, 24v, and 48v oriented.   However, beyond having to search for voltage range compatible equipment - there's no technical issue with a 36v battery bank Smile
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#3
You also need to consider why they landed at the recycler in the first place. From my experience, such packs often have 1 or more bad cells.

Also, if it has separate charging and discharging connectors, tying multiple batteries together in parallel may be a very bad idea. Depends on the BMS.
100kwh-hunter likes this post
Modular PowerShelf using 3D printed packs.  50kWh and growing.
https://secondlifestorage.com/showthread.php?tid=6458
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#4
Thanks guys for your feedback. May try recovering them from the packs instead. They seem to be eve batteries and the handfull I have tested came in around 2600 mah.

Paul
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