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  1. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    You can email me if you have technical question like this. I think it is already quite clear from the reference.
  2. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    It is possible to use the CAN bus to get discharge current from connected VESC. Otherwise, no it is not possible, XLITE is a charge BMS and the charge port cannot really be used as a discharge port.
  3. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    It is something possible to develop, but not in the immediate future. A year maybe from now. Things can be done faster if you are a company willing to pay for faster development and need a custom board for one of your product.
  4. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Firmware version V6.00 is using only lowest cell voltage for SOC. Coulomb counting has been disabled for this release even on discharge BMS. I will bring back coulomb couting as an option for next firmware version.
  5. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    SOC method is the same in V6.00 firmware for all boards. Issue with using two xlite is related to charging. You basically need two charger, one for each XLITE/half of the pack. This is not ideal. Everything else would likely work just fine. Ideally an XLITE-30/XLITE-36 would be better solutions...
  6. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    I haven't yet experimented with two XLITE-V3 over CAN bus yet, but yes that is likely the way to go with a 26S pack. XLITE-V3 now has an isolated CAN bus IC and a Bluetooth module which are now fully integrated with VESC ecosystem( CAN & BLE). VESC mobile over Bluetooth is very nice for BMS...
  7. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    This is why I'm not jumping in this stuff. It just looks like an infinite list of unobtainable requirements... I will start only implementing CAN bus protocols for now and slowly ramp up new features oriented toward solar/energy storage
  8. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    I'm just asking for what is the inverter/charger that should be supported first via CAN bus or modbus with link toward their protocol and product...
  9. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Eventually I will offer something more specific to solar/storage, but I don't really have enough experience with solar yet. I installed solar panels for first time at home this year and I'm planning to add some storage capacity eventually and start playing with the idea. I'm not living in an...
  10. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Yes, those batrium system seems to be better oriented toward solar/storage application. The web app user interface is nice for remote viewing and wifi is included. Their hardware seems to offer quite a large cooling capacity for balancing large packs. The BMS hardware presented in this thread...
  11. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    The SS is not intended to be a single port BMS it has separate charge & discharge paths. -There is only one UART, use CAN instead. -Yes I2C can be used for IO expension - Using 2 OZ in copper at least for enabling higher current - Some high power surge wirewound resistor do exist for...
  12. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Do a manual firmware update with the binary on the website. XLITE firmware was previously common for both hardware XLITE-24 and XLITE-12. Now they each have their own dedicated default with those new firmwares. You still have a few things missing I guess using the EVAL board unless you have...
  13. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Nice! Using SPI directly instead of ISOSPI? Only one slave board is possible in this configuration.
  14. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    All registers & peripherals are exactly the same?
  15. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Can't really help you. You are not using the right hardware so a lot of things will not work properly...
  16. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Will have a look eventually for sure. I'm normally focusing on systems that operates at higher voltages than 48VDC, but I understand the need. Do you know if all Eltek share the same CAN bus protocol? I quickly found some official CAN bus protocol info for the "3kW valere" ones...
  17. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    CAN interface is present on all EBMS hardware and firmware code is available on github. Quite a very straightforward CAN implementation IMO, but some might get lost because there is no "dbc" for EBMS by default. Although, on github there is a "dbc" file targeted for electric formula SAE...
  18. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Sure, but a lot of effort is needed to get there my friend. I have enough work at the moment with my EBMS stuff and keeping this going forward. I made a lot of fine tuning lately related to filtering & current measurement precision.
  19. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    I'm receiving several requests related to solar. There is a need for having high voltage, high current capable BMS with solid state switches to minimize power consumption I think. The inverter/sine wave part + MPPT is another big project on its own. I remember good old Jack Rickard did...
  20. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Some new features for 2022: - Delta Q charger support over CAN bus - Elcon/TC charger support over CAN bus - VESC & VESC-tool CAN & USB compatibility for firmware updates , data monitoring & parameters configuration - State of charge tracking is now possible even with charge only BMS (XLITE)...
  21. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Can be, depends on the components used...50V tolerant contactors are quite scarse...So why go with 12S if there is no contactor for this? (at a decent price & weight) Go on PM please for your particular needs.
  22. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    1. 12V-24V on master boards is required 2. back to back mosfet on the charge port
  23. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Could you read the previous post before asking the same question again and again?. SS and XLITE BMS are way better for drone application due to their reduced weight, low power consumption and size. The XLITE 12 might be a good start... it might be one of the smallest BMS you can find with VESC...
  24. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    Schematics on github are quite outdated. I stopped to make newest designs open source. Firmware & software are still open source so you can use it. They do represent 90% of the work, Hardware design is only a small part.
  25. E

    Open source BMS for 48V to 400V lithium-ion battery pack

    BMS take cares of main contactors activation depending on readings & user defined parameters with the ENNOID-BMS-tool. Different setups requires different parameters. There is a "not used timeout setting" that can be set to a small amount of time if you want to avoid standby losses with those...
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