Blown battery?

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  • macz
    Senior Member
    • Jan 2009
    • 118
    #1

    Blown battery?

    I blew a cell today and a connector melted....what causes this? I also melted 2 connectors prior..Is my esc bad? They are promatch cells 7 cell pack...any ideas? Now I have no connectors and I just spliced and attached them to each other is this ok?
    Tags: None
    • domwilson
      Moderator
      • Apr 2007
      • 4408
      #2
      What connectors are you using? What prop? Is this a stock setup? Any pics?
      Government Moto:
      "Why fix it? Blame someone else for breaking it."

        Comment

        • macz
          Senior Member
          • Jan 2009
          • 118
          #3
          Octura prop x642 everything else is stock....Its the 7cell promatch 4600 that keep melting..no pics Am I just on the throttle too much? I just twisted the wires around each other and electrical tape it on and it runs but it seems to be melting the connectors off the esc...

            Comment

            • domwilson
              Moderator
              • Apr 2007
              • 4408
              #4
              A few things can cause this. Poor solder joints on the connectors, Strut needs to be raised, Binding in the drive line, etc. Try a smaller prop. Did you lube the flex shaft before you ran it?
              Government Moto:
              "Why fix it? Blame someone else for breaking it."

                Comment

                • macz
                  Senior Member
                  • Jan 2009
                  • 118
                  #5
                  No I didnt lube flex shaft but after when I took it out it seemed ok....yea it seems the wire would get real hard right before the connector(Iguess its melting right there ) then it would just break off and the boat stopped....I'll raise strut and I already lube flex shaft....give it a go tommorow. Also I have 2 7.4v 3800 packs I ran and I can only run at 1/2 throttle as soon as I go WOT it stops in the water its just these packs and not the promatch...any ideas?

                    Comment

                    • domwilson
                      Moderator
                      • Apr 2007
                      • 4408
                      #6
                      Yes. You'll need the programmer. You want to disable the Low Voltage Cutoff. For the time being. Hold the throttle full open while you connect your batteries. That sometimes fixes that problem. As for the wires, twisting them will not work. Too high a current draw. You will need to re-solder them.
                      Government Moto:
                      "Why fix it? Blame someone else for breaking it."

                        Comment

                        • macz
                          Senior Member
                          • Jan 2009
                          • 118
                          #7
                          Yea I'll resolder...can I run a 7cell pack and a 6 cell pack together since the one battery got fried?

                            Comment

                            • macz
                              Senior Member
                              • Jan 2009
                              • 118
                              #8
                              Crap!!! I blew another battery pack....O well I thought I noticed some discoloring on one of the cells...anyone have stock motor and esc they wanna sell? Or what else is a decent motor and esc for this boat? Will this fit the blackjack? http://www.offshoreelectrics.com/pro...=dh-aqcom-1800 Is it an upgrade from stock?
                              Last edited by macz; 07-19-2009, 06:39 PM.

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