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15S LI-ion with balance leads without BMS

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  • Patrick1977
    commented on 's reply
    Sorry i have taken a "looooooong" time to respond as i dont often visit my page much anymore. My battery is holding up very nice, i get about 75km out of rough trails with huge elevation changes (hills) without a problem (using pas most of the time-pedalling) but on a flat like some of these rail trails down in Victoria (which im doing soon) i hope to acheive 100km min ( may even break 150km) as the ground is fairly level with only slight inclines (obvisouly following an old train line) should be awesome. Good luck with your build

  • D.808
    replied
    How has the battery been holding up? Thinking about building three 5s8p batteries to make 60v 24AH. Then using my 6s charger to balance the batteries when charging.

    Leave a comment:


  • Patrick1977
    started a topic 15S LI-ion with balance leads without BMS

    15S LI-ion with balance leads without BMS

    I found This Image quite useful in Getting the most "Battery Cycle Life From Li-Ion Cells"

    I'm personally Using a I-Charger 4010 Duo Charger/Discharger/Balancer (NO BMS Needed) for Charging/Balancing a 15S/10P Battery Pack to "4.0v per cell" giving a Total Voltage of 60V and Significally increasing my Battery Life span, possibly 3 X more Cycle Life (upto 1,500 Cycles)

    Batteries are in Two Physical Parts : Battery 1 - 8S/10P & Battery 2 - 7S/10P ( NCR18650GA cells) 3500mAh Rating (60V at 35AH)

    A solid State Relay then switches together in series powered by a 3S/3P (Aux Battery) Off position Electrically isolates 2 x battery packs from each other so I-Charger can safely charge/Balance both Packs seperatly.

    The Relay latching is controlled by a 3 position Key Switch (Off-Charging/Balancing, On- EEB Operating, Lights- Running & Headlight for Night)

    I included a "Small scale Test" to prove that it will operate safely and Correctly (Photo Below)

    using 2 x 3S Li-Po Batteries to substitute Li-Ion Packs (Below) Currently building both Li-Ion Packs (see my battery build post)

    Note- Photo is not showing Batteries but they connect to each 2 x Deans Connector
    Last edited by Patrick1977; 11-13-2017, 07:48 AM.
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