walkera voyager 3

Discussion in 'Walkera Help!' started by raptor1978, Jun 3, 2020.

  1. bjr981s
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    bjr981s Moderator Staff Member

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    Ah,

    I had forgotten. I got that from my own Voyager 3 and posted. I normally post files in our resources section and only put links in the thread. I will copy to Resources for future reference.

    When you say that the green lights on the back of the Drone (battery) are blinking, only 1 should blink. Is it only 1 or all of them?

     
  2. raptor1978
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    raptor1978 New Member

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    all of them brian
     
  3. bjr981s
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    Ah, That would mean you have a battery fault. How did you measure the battery voltage you posted?
     
  4. bjr981s
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    bjr981s Moderator Staff Member

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    If you PM your phone number to me I will call you now.
     
  5. raptor1978
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    raptor1978 New Member

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    i used a cell voltage meter via the balance lead brian to read the voltage and the individual cells are unbalanced can this be recovered by discharging and re charging
     
  6. raptor1978
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    no need to call now brian i am 95% sure its the battery thats defective as i have just opened it up to have a look and both packs inside show slight puffing so i am going to swap out the cells with new packs to hopefully get her flying again will keep you updated on my progress
     
  7. bjr981s
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    No It cant. The reason is that some cells are likely to be damaged it depends on what the voltage difference is between the highest and lowest. The balance charger will try and balance the cells by bleeding off cells that are higher than the lowest. In some cases if the low cell is not charging fast enough the charger will stop charging as the high cells have hit the max voltage limit.

    Just what were the exact cell voltages on the battery? can you post the 8 cells values here?

    You need a hybrid charger to recover the battery if it is recoverable.

    If you give me the voltages I can determine if it is recoverable.

    You will need to create a breakout cable or a multi balancer lead cable from an 8S balance extender for the balance lead, and use a Lipo Balancer (pocket). The max cell count for a balancer is 7. The 6 Cell balancers are common and quite cheap. So an 8S to 2 x 4S plus some 2,3,4,5,6S leads.

    I don't use the OEM chargers for my 8S batteries I use a Graupner 8 Call charger / balancer.

    Only a Graupner 8 call charger should do the job but are very expensive. As they have an 8 cell balancer and do operate in Hybrid mode. (charge low cells by the balance leads rather than the main lead and bleed off the high cells. They are German and the best quality chargers around. But Graupner have closed their international stores and are restructuring. You may be able to pick one up in Germany at the main office.

    Cheers Brian
     
  8. raptor1978
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    raptor1978 New Member

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    hi brian not had much chance to do much with the battery other than using a cell meter 8 to balance the battery to a more even state and then slowly charging at 1 amp

    before this the cells read with the lowest cell reading at 3.79v and the highest at 4.21v

    now they read as such

    1) 4.186
    2) 4.179
    3) 4.191
    4) 4.181
    5) 4.197
    6) 4.210
    7) 4.203
    8) 4.222

    total 33.569v

    it did charge to 33.6v but after checking a day later it now reads 33.569v
     
  9. bjr981s
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    They look OK now. 3.79 to 4.21 was way to much.

    The test now, will be to see how they hold the voltage under load.

    Fly the drone for about 2 minutes and the check the voltages again.

    Cheers
     

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