Welcome to InspirePilots.com

Join the leading DJI Inspire community for free!

Discharging Batteries

Discussion in 'Inspire 1 Discussion' started by JimPA, May 7, 2015.

  1. JimPA

    Joined:
    Apr 5, 2015
    Messages:
    117
    Likes Received:
    70
    I have a question about a possible way to quickly discharge my Inspire 1 batteries. I have a 400 watt programmable DC Load. I'm wondering if I want to discharge these batteries, what wattage or current would be safe to use.

    Also, I know when you turn on your Inspire 1 and just leave it the AC will shut itself down when it gets down too low. Does anyone know if this is the battery shutting things down at a low voltage point or the AC?

    I'm just wondering if I can put a specific current setting into the DC Load and walk away and the battery turn itself off when it's totally discharged, or should I make an external circuit that shuts off the DC Load when the battery get's to a specific voltage?
     
  2. Kilrah

    Joined:
    Feb 3, 2015
    Messages:
    1,881
    Likes Received:
    728
    The battery will turn itself off. I discharge with 4A as that's the max my charger will do with 6s (80W).

    Sent from my SM-G920F using Tapatalk
     
    JimPA likes this.
  3. JimPA

    Joined:
    Apr 5, 2015
    Messages:
    117
    Likes Received:
    70
    Thanks Kilrah.
     
  4. Daniel Mascheck

    Joined:
    Feb 20, 2015
    Messages:
    203
    Likes Received:
    35
    Excuse the ignorance, but what do you mean 4A? I have no idea what that means, but I'm interested in discharging my batteries from time to time.
     
  5. Kilrah

    Joined:
    Feb 3, 2015
    Messages:
    1,881
    Likes Received:
    728
    4 amps...
     
  6. InspiredOne

    Joined:
    Jan 30, 2015
    Messages:
    1,140
    Likes Received:
    657
    Location:
    South Florida, USA
    ALERT: Ignorance Exposure in Progress

    Is this a device for discharging batteries?
     
    Outta Control likes this.
  7. JimPA

    Joined:
    Apr 5, 2015
    Messages:
    117
    Likes Received:
    70
    A Programmable DC Load is a device that you would use to create a load on a circuit. It's used mostly by people that make things like power supplies. I just happen to have one and it can be set to create a specific load on a battery so I can use this to drain my batteries w/o having to put them in the Inspire.

    Not saying that people should run out and get one of these, as they are not a cheap date, but if you have one on your bench already why not use it. :)

    http://www.circuitspecialists.com/dc-load-400-watt-array-3721a.html
     
  8. Kilrah

    Joined:
    Feb 3, 2015
    Messages:
    1,881
    Likes Received:
    728
    In my case I just use my iCharger 3010B charger and set it to 4A discharge current, 6s lipo and 3.1V/cell termination. It will thus slow down discharge current when it reaches 6*3.1V, and as that's apparently also the set point for the I1's battery low cell voltage protection eventually the lowest cell will reach that and the battery will turn itself off, but discharge will be at low current by then.
     
  9. InspiredOne

    Joined:
    Jan 30, 2015
    Messages:
    1,140
    Likes Received:
    657
    Location:
    South Florida, USA
    Jim and Kilrah, thank you for the information.

    Yes, nearly $700 to discharge batteries is a tad steep for me. :confused: Attempting to use complicated pieces of equipment like that are well above my pay grade.
     
    John Archer likes this.
  10. Harryscopic

    Joined:
    Dec 21, 2015
    Messages:
    29
    Likes Received:
    5
    Location:
    Spain
    Has anyone tried this device? It makes more sense to use the stored energy to charge a phone or whatever, instead of wasting it.
    http://amzn.com/B016LQ91BU
     
  11. InspiredOne

    Joined:
    Jan 30, 2015
    Messages:
    1,140
    Likes Received:
    657
    Location:
    South Florida, USA
    ""SUMOMOTO" Interlligent Battery Discharging Discharger..." :confused:

    The discharger may be "intelligent" but the person inputting the info? o_O
     
  12. harleyujoe

    Joined:
    Dec 23, 2015
    Messages:
    18
    Likes Received:
    6
    could you put light bulb on to discharge batteries with wires attached to battery connection ??
     
  13. Jason Boucher

    Joined:
    Dec 28, 2015
    Messages:
    96
    Likes Received:
    28
    Location:
    Madawaska Maine, USA
    You could use a DC bulb to discharge the battery, just make sure its the correct voltage / wattage so your not trying to pull too much of a load from the battery.
     
  14. damoncooper

    Joined:
    Mar 20, 2014
    Messages:
    3,451
    Likes Received:
    1,620
    Location:
    Boston, MA
    I use this. FW in Beta now for Storage Mode. It's so nice to be able to drop in DJI batteries and set them for Storage Mode regardless of current charge.

    ImageUploadedByTapatalk1457993403.178852.jpg
     
    John Archer likes this.
  15. Nasscar][

    Joined:
    Apr 30, 2014
    Messages:
    51
    Likes Received:
    3
    damoncooper what is that discharge watts for storage mode?

    I'm currently using a CBA IV and discharging at 5.75amps x10 for breaking in my new inspire batteries. (time consuming but I don't mind) better fail at the bench than in the air.

    Note: discharging with 5.75amps to 23.65 volts x 10 cycles.

    Nas,
     
  16. Nigpd

    Joined:
    Jan 9, 2016
    Messages:
    89
    Likes Received:
    30
    Location:
    UK
    I have one of these too, but am unaware of the ability to set it to storage mode.

    Would you be able to let me know where I can find out more about this facility please?

    Thanks in advance
     
    John Archer likes this.
  17. damoncooper

    Joined:
    Mar 20, 2014
    Messages:
    3,451
    Likes Received:
    1,620
    Location:
    Boston, MA
    The FW is in Beta. Stay tuned.
     
    John Archer and Nigpd like this.
  18. Nigpd

    Joined:
    Jan 9, 2016
    Messages:
    89
    Likes Received:
    30
    Location:
    UK
    Sounds good thanks. Can't wait for this to happen :)
     
    John Archer likes this.
  19. damoncooper

    Joined:
    Mar 20, 2014
    Messages:
    3,451
    Likes Received:
    1,620
    Location:
    Boston, MA
    It sure beats what some guys are doing on RC Groups to discharge to storage :)

    ImageUploadedByTapatalk1458078540.914626.jpg
     
    John Archer likes this.
  20. Jimmykjimmy

    Joined:
    Oct 20, 2015
    Messages:
    138
    Likes Received:
    15
    I got the message, that I should discharge the battery to 5% and then recharge to 50% if I am storing it. Discharged on the Inspire (waiting for Inspire Angel) down to nothing, recharged so that the 3rd light was flashing.
    Recharged before flight, but got the same warning message. Battery was at 100% and cells were at 4.32. Could the message to discharge/recharge be some type of glitch?