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  1. V

    Correct charge voltage for Samsung 35E

    Hi, the datasheet for the 35e says charge voltage is 4.2v, but setting up my isdt t8 charger, it seems to say 4.1v for LiIon and 4.2v for LiPo. I thought the 35e was LiIon, even the datasheet says lithium ion, so why doesn't my charger not let me set LiIon to 4.2v? Is the 35e actually a Lipo...
  2. V

    First battery pack build, does my design look OK?

    Before I spot weld this bad boy up, I'd be hugely grateful for any advice, should you notice something 'wrong' 91x samsung 35e in 7s13p configuration, so a 24v system which will have a continuous load of around 13A, and a theoretical peak of 74a for 10 seconds which will probably never/rarely...
  3. V

    What connector is this please?

    I'm upgrading this mobility scooter to lithium, and thought it would be a good idea to keep stock connectors here in case it needs to be put back to stock (I will probably upgrade the awg of the wire from this connector back to the controller board) So, anyone know what this connector is...
  4. V

    Charger Reccommendation Please?

    I'm building my first battery pack - 7S13P Samsung 35E with a Daly Electronics 7s 24v BMS http://www.dalyelec.com/product_view_250_109.html 60a 24V common port version...
  5. V

    Battery pack casing options

    I am building a battery pack to fit inside an aluminium tray which is 235x153 (mobility scooter) . What are my options for packaging the battery? I intend to use 18650 cells with hegaxonal spacers, but after the kapton tape is applied I'm unsure about what further wrappings I could use. I like...
  6. V

    trouble sourcing a 7s bms

    can anyone suggest where i can find a bms for a 7s9p pack consisting of these samsung cells INR21700-50E if I understand correctly, that's 9.8A max discharge (continuous) per cell which means in my 9p configuration a bms that can handle a maximum discharge current of 88A continuous and 132A...
  7. V

    Choosing battery chemistry for a light mobility scooter

    I'm based in the UK. Existing family member's mobility scooter has 2x 60w motors 12v 5.5A going through a https://scooterland.net.au/wp-content/uploads/2017/04/DS60-70-Dynamic-Controller.pdf 24v motor controller connected to 2x 12v 7ah SLA batteries The battery compartment is solid...
  8. V

    Spacer/Holder for 21700 cells

    I'm considering building a battery pack from samsunc nmc cells in the more modern 21700 size format - using samsung inr21700-40t cells. I can't find anyone supplying hexagonal spacers in the 21700 size - can anyone here advise if they've seen someone selling 21700 spacers in a hexagonal layout...
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