Search results

Date Relevance Most replies

  1. L

    QS mid motor simulation

    Hi, recently I started thinking about building mid-driven motorcycle and I am trying to find out if there is any possible way of extracting proper values from the manufacturer performance chart to use Grins motor simulator tool. I see there is no direct way, but maybe with some try and error...
  2. L

    QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China

    I bought it from Nexun.pl and they keep telling me that the programming works but I have tried 6 computers with 3 operating systems and none of it worked. I came to conclusion that there is problem in the controller or the programming software. Everything seems fine until I try to read the...
  3. L

    QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China

    Hi, where do I get technical support for ML7260 controllers?
  4. L

    Sabvoton ML7260 controller

    Here are photos of it, it is definitely beyond cheap chinese controllers and I really like how it is designed... And it was rather cheap too (90€). It is rated for 20s and 60A battery / 170A phase max. I am not sure if it is FOC, it seems more like sine to me.
  5. L

    upgrading phase wires gone wrong

    Thinnest insulation can be easily done with kapton tape. But be sure it is real kapton, there are lot of fakes around, try it with soldering iron first, if it melts it is fake. Firs strip PVC insulation of a standard stranded cable. Wind a layer of 1cm wide kapton tape so it overlaps half or...
  6. L

    Sabvoton ML7260 controller

    Hello everybody, I bought 3pcs of mentioned controllers and I have problem connecting it to the computer. Does anybody have experience with it? Also any additional info about this controller is highly welcome...
  7. L

    Bafang BBSHD 52v 1000w 28a Controller?

    steve-- - You don´t understand a thing. Better go learning than playing smart. You definitely have no clue how BLDC motor - controller combo works... The problem is definitely in firmware, it is hard-coded to 48 or 52V and user can not change it. Other strange thing came out when I was trying...
  8. L

    CHEAP NEW ORIGINAL 18650 21700 BATTERY CELLS, POUCHES AND PACKS

    Hi tumich, sent You two PMs, I really need to know, can´t wait another week, please answer me...
  9. L

    100% discharge rate capacity

    Hi goatman, today I returned to this thread and I must say it is unbelievable how far can one misunderstandig go... Your problem is simple. You totally misunderstood and misrepresented the data in datasheet. You have no idea what it is about and for what. Those datasheets are useful only if You...
  10. L

    100% discharge rate capacity

    I am sorry to inform You that You got it totally wrong. Please read some battery life related threads to get the basics right first.
  11. L

    Upgrading a DPV Battery

    Wh is calculated Ah x Voltage. Real life Ah would be little lower value, let us say 3,3Ah. 3,3x13=42,9Ah x 25,2V = 1081Wh. How much current does it consume during dive or what is the wattage of the motor? This is important before making cell choice.
  12. L

    High power ~2kW li-ion charger using DC stick welder

    Try this: https://endless-sphere.com/forums/viewtopic.php?t=66169
  13. L

    AliExpress battery pack unboxing (for my eZuma project)

    There are few installing 20kW controller and 120A BMS for low power scooter :)
  14. L

    AliExpress battery pack unboxing (for my eZuma project)

    Reading the thread made me think this is going to be high power one...
  15. L

    AliExpress battery pack unboxing (for my eZuma project)

    No effort will help with the obvious - improper cells for this job... So much money and effort and so short will it last...
  16. L

    RC lipo to replace 24V sla in ups?

    Placing the batteries outside UPS housing is a good idea (for any type batteries). Electronics inside UPS constantly warms up one side of the battery...
  17. L

    Basic BMS question-no separate charge/load terminals?

    BMS will loose its function if charge/load paralelled. The diodes would work. The point is charge port can only block charging and load port can only block discharging. BMS with common charge/discharge port would be best solution.
  18. L

    36V Battery bms question

    8,5Ah is capacity. BMS is rated for current. Chose the BMS according to how many amps are You going to draw from Your battery.
  19. L

    Help BMS connections

    Battery plus goes directly to charger and load. You only connect B- (battery minus), C- (charger minus) and P- (power-load minus) to the board. BMS is getting plus from the balance wires. They should be chcecked twice and connected last.
  20. L

    A solution to charging Li-ion in winter freezing weather: Testing an outdoor temperature-controlled charging system.

    If the battery is frozen, it will take some time to warm up to its core. Because You don´t have temperature sensor inside the battery, the easiest way to sort this out is to delay the charging after the temperature inside the chamber reaches "warm enough". The delay should be longer if the...
  21. L

    Parallel protection 18650 pack

    Either fuse each cell or don´t bother at all... It is there to prevent parallel cells discharge to damaged (shorted) cell in the group.
  22. L

    14s3p Battery Build <how's this look?>

    This battery is definitely underrated for use in 1000W system. What controller are You going to use? How many amps would it draw? Systems with 1000W DD are often set up to 30A. If Your battery should live any longer use it at 10-15A max.
  23. L

    CHEAP NEW ORIGINAL 18650 21700 BATTERY CELLS, POUCHES AND PACKS

    Hi Tumich, what conversion rate do You use for EUR price calculation? (Would be really nice to have prices in both USD/EUR in Your firs post...)
  24. L

    Help needed building dummy load device

    I would clamp it with some piece of wood... If any good maybe change to aluminum piece later... Or clamp it between two water cooled heatsinks - the best option :-) Don´t forget heatsink compound...
  25. L

    kWeld - "Next level" DIY battery spot welder

    Today I have received EC8 connectors with housings, rated for 180A continuous it looks like great candidate to upgrade XT-90. It also accepts thick cables up to 7mm diameter.
Back
Top