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  1. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    I bet the capacity tester is putting enough of a load on the BMS to draw the voltage down. A light bulb would do the same thing. Your BMS is behaving the same way as mine did with the older app and the lock was on. I can suggest a few other things to try but they probably won't work. But try...
  2. Gazoo

    CATL 271Ah cell issues.

    You will want to be sure to put insulating spacers between the cells. Don't allow the cells to touch each other because the cell case is positive with leakage voltage.
  3. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    Only other thing I can suggest, if you haven't tried, is to reinstall the app. If that doesn't work then your BMS is most likely faulty.
  4. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    The "Switch Function" is turned on in my app. Not sure that will make a difference but it's worth a try.
  5. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    I have posted twice in this thread, and now three times, the lock you refer to does not exist if using the latest version of the app.
  6. Gazoo

    EVE 280Ah LiFePO4 Review (Dongguan Lightning New Energy Technology)

    If I had to do it all over again I would prefer the laser welded studs over inserting my own grub screws. The threads in the cells terminals are very easy to strip even if using a thread locker as I found out the hard way. Also the recommended torque for the nuts if using grub screws, or if...
  7. Gazoo

    EVE 280Ah and CATL 280Ah For Sale Houston, TX

    Very strange indeed and makes zero sense. You posted the name of your company so everyone knows where your office is. You are posting in the corporate section of the forum and you are allowed to post a link to your website in this section as well as cell prices. If you are legit you are off to...
  8. Gazoo

    EVE 280Ah LiFePO4 Review (Dongguan Lightning New Energy Technology)

    The cycle life is not more than 3500 for the LF280's. :) And to reach 3500 cycles one must use perfect compression throughout the SOC of the cells. Same applies to the LF280K which "claim" a 6000 cycle life. The easiest way to increase cycle life is to keep the cells SOC between the knees. But...
  9. Gazoo

    EVE 280Ah LiFePO4 Review (Dongguan Lightning New Energy Technology)

    Yes but I don't know what the version of the datasheet you have is. It should be at the top of the spec sheet. I have a few data sheets for the LF280's, and data sheets for the LF289L, LF280K and LF280N and I don't see that error. Where did you get that data sheet from?
  10. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    The raised material is aluminum. The stud is stainless steel. I believe these laser welded studs have been tested up to 150 amps with little heating at the stud.
  11. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    Did you try putting a charge on the battery through the BMS?
  12. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    There is no lock mode with the latest version of the android app. Instead there are independent on/off modes on the main screen for charging and discharging and the OP has indicated he sees those settings. So he is not locked out.
  13. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    That was on the older app versions. A photo would be helpful to confirm you have everything hooked up directly. :)
  14. Gazoo

    New DIY 12V Build - low battery voltage from BMS issue

    Are you using the latest version of the app that's available from Overkills website? And are you using Android? I had a similar problem when I first assembled my battery and discovered there was a lock/unlock in the app settings. Once I unlocked it the BMS came to life at the output. But I am...
  15. Gazoo

    Scamazon Warehouse - Solar controller shoppers beware

    Today I returned 2 Crucial M.2 SSD's. I bought one and when it didn't work properly I ordered a second one thinking the first one was defective. The bios recognized them properly but with both when I rebooted, I could not even get into the bios until I removed the SSD. So I called Amazon tech...
  16. Gazoo

    Top Balanced but way off after discharge?

    I am curious why the LVD didn't kick in when the lowest cell reached 2.5 volts? I have tested my BMS to make sure the LVD is working properly and it kicks in at 2.5 volts. Also that's a very high delta. Why didn't you charge to 3.65 volts? My delta isn't all that great either being .5 volts when...
  17. Gazoo

    EVE 280ah 24v battery frame

    I hand tightened the nuts with the cells at a full SOC. But my cells are in a stationary environment. Lishen might have different compression specs than EVE so it might be best to contact them directly. I don't think anyone has as far as I know. Other than that I don't see anything wrong with...
  18. Gazoo

    CATL 271Ah cell issues.

    The receiver has the option to refuse payment and in that case the shipment is returned to the sender. So it's best to get the receivers permission before sending anything out COD or attempting to pull a fast one by using the receivers account without the receivers permission.
  19. Gazoo

    EVE 280ah 24v battery frame

    The cells expand slightly when fully charged and deflate when discharged. Compressing the cells prevents terminal stress. Too much compression is worse than no compression. If using braided busbars then this would not be a huge deal. Proper compression using springs will extend cycle life but...
  20. Gazoo

    Electrolyte flowing inside LiFePO4 cell

    It's a watery liquid and what you hear in your cell is normal. The cell is filled with electrolyte where the over pressure release valve is and then the valve is put in and sealed. Did you watch the video posted above? It clearly shows the electrolyte is watery. There have been several reports...
  21. Gazoo

    Electrolyte flowing inside LiFePO4 cell

    You beat me to it. (y) My LF280 EVE cells also have a gurgling sound when I rotate them.
  22. Gazoo

    CATL 271Ah cell issues.

    I would call UPS and ask them. It sounds as though they have contracted out a hazmat service to handle stuff like this. The way I read it you don't need a contract but it's most likely going to be expensive. I don't understand why he would want the cells returned to him and am sorry he is...
  23. Gazoo

    CATL 271Ah cell issues.

    I feel the same way and I am struggling with it. Hard to believe a month has gone by since Brewman started this thread. The fat lady hasn't sung her tune yet. But from what I have seen so far is the supplier(s) are not cooperating and it's strange there are now three suppliers involved...
  24. Gazoo

    CATL 271Ah cell issues.

    I don't think a PM or a phone call would help. It's clear you and I don't see eye to eye and I have nothing to add to what I have posted. I could come back and reply to every sentence you wrote in your post but it's not worth it and I would be mostly repeating myself. This whole debacle has...
  25. Gazoo

    CATL 271Ah cell issues.

    You are of course correct. But when one makes false statements about me publicly I will respond publicly. And I would expect anyone else to do the same. Done with the tussle and unless "someone" aggravates me in this thread I have nothing more to say.
  26. Gazoo

    CATL 271Ah cell issues.

    You are wrong. I have been affected because I had recommended the group buy. If even just one person made a purchase based on my recommendation and received damaged cells then I am affected. Furthermore, the only one I have "attacked" is YOU and I have been as polite about it as I can be. If...
  27. Gazoo

    noob top balancing - over charged my cells to 4.2v

    I get it now. Sorry I misread your meaning.
  28. Gazoo

    CATL 271Ah cell issues.

    In all fairness one could ask you the same questions. LOLOLOL
  29. Gazoo

    Dongguan Lightning New Energy order, used CATL 120Ah LiFePo4??

    Thanks @upnorthandpersonal. The video is only 6mb's. I zipped it up. It should be viewable by clicking on the zip file after it downloads to your computer. For future reference, this is the best way to upload files with extensions the forum does not allow.
  30. Gazoo

    noob top balancing - over charged my cells to 4.2v

    Not quite sure if you meant AFTER. The voltage of the power supply is supposed to be set to 3.65 volts before connecting to the cells. If you were referring to something else then you have my apologies. I think most of us agree if there is any damage it's so small it can't be measured. It only...
  31. Gazoo

    Dongguan Lightning New Energy order, used CATL 120Ah LiFePo4??

    I don't know if the forum puts a limit on the size of the files but there are a a couple of options that might work. Rename the video extension to .jpg. The better option would be to use a program to zip the file. I use 7-Zip. It's the easiest I have found. Again I don't know if there is a...
  32. Gazoo

    Bonding / Grounding, Will's 13kW System, and my Youtube Community Ban

    I am glad you took the time to respond and remember others are viewing threads and might learn a thing or two. But a write up concerning grounding is an excellent idea. While I don't think the subject will ever be put completely to rest a write up would be super helpful. (y)
  33. Gazoo

    Manual Top Balance - charging a single cell in a series pack

    I have done this with one low cell. Make sure there are no loads connected to the BMS and balancing is turned off.
  34. Gazoo

    CATL 271Ah cell issues.

    What's also cool is the supplier has posted a snippet of Andy's video on their website.
  35. Gazoo

    CATL 271Ah cell issues.

    Did Andy mention where he got the cells from? I haven't watched all of his videos. Thanks.
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