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    Erbauer 18-24v battery charger

    Does anyone know how to get hold of an electrical schematic for this battery charger? I have Ryobi portable drills but the charger is missing so was wondering if I could use an Erbauer charger which I do have instead. The battery connections can be altered on the charger but the Ryobi batteries are charged through a temperature detector on the negative line. The Erbauer charger has a 3rd terminal but its positive.

    #2
    Re: Erbauer 18-24v battery charger

    Are you using ni-cad batteries or are you using Li-ion batteries
    It makes a big difference which batteries we are talking about

    It might be a big maybe ?
    Last edited by sam_sam_sam; 09-17-2018, 03:30 PM.
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    Comment


      #3
      Re: Erbauer 18-24v battery charger

      Originally posted by Cornboats View Post
      The Erbauer charger has a 3rd terminal but its positive.
      You need to know how this 3rd terminal is being used for me to answer your question
      9 PC LCD Monitor
      6 LCD Flat Screen TV
      30 Desk Top Switching Power Supply
      10 Battery Charger Switching Power Supply for Power Tool
      6 18v Lithium Battery Power Boards for Tool Battery Packs
      1 XBox 360 Switching Power Supply and M Board
      25 Servo Drives 220/460 3 Phase
      6 De-soldering Station Switching Power Supply 1 Power Supply
      1 Dell Mother Board
      15 Computer Power Supply
      1 HP Printer Supply & Control Board * lighting finished it *


      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
      2 Hem Saw Computer Stack Board

      All of these had CAPs POOF
      All of the mosfet that are taken out by bad caps

      Comment


        #4
        Re: Erbauer 18-24v battery charger

        Thanks for taking the trouble to reply. They're Ni-cad batteries. I don't know how the 3rd terminal works, I thought getting hold of a schematic would help me understand. On the Ryobi charger the negative went through the 3rd terminal via a temperature fuse to the negative of the batteries.

        On the Erbauer when powered on I get 26v across + & - and 26v across the 3rd terminal and - , so I've assumed the 3rd terminal is +.

        I've got 2 Erbauer chargers, 1 has an ac transformer the other has no transformer but instead a massive capacitor 45micro farrad x 450v.
        Here's some pics of both.
        Attached Files

        Comment


          #5
          Re: Erbauer 18-24v battery charger

          Do you have a battery for this charger if you do can you take the battery case off of it and see how it is wired
          9 PC LCD Monitor
          6 LCD Flat Screen TV
          30 Desk Top Switching Power Supply
          10 Battery Charger Switching Power Supply for Power Tool
          6 18v Lithium Battery Power Boards for Tool Battery Packs
          1 XBox 360 Switching Power Supply and M Board
          25 Servo Drives 220/460 3 Phase
          6 De-soldering Station Switching Power Supply 1 Power Supply
          1 Dell Mother Board
          15 Computer Power Supply
          1 HP Printer Supply & Control Board * lighting finished it *


          These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

          1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
          2 Hem Saw Computer Stack Board

          All of these had CAPs POOF
          All of the mosfet that are taken out by bad caps

          Comment


            #6
            Re: Erbauer 18-24v battery charger

            No I'm afraid I don't. I stripped the Ryobi down which is how I know that charging is thro the 3rd terminal.
            I keep searching the net in the hope I'll find a schematic. Can you reverse engineer the circuits in the photos I posted?

            Comment


              #7
              Re: Erbauer 18-24v battery charger

              Not really this why you need a battery for this charger because it can be a few different ways it can be done one way is just use a thermo switch or a resistor type sensor or “k” type or something similar
              Last edited by sam_sam_sam; 09-20-2018, 07:05 PM.
              9 PC LCD Monitor
              6 LCD Flat Screen TV
              30 Desk Top Switching Power Supply
              10 Battery Charger Switching Power Supply for Power Tool
              6 18v Lithium Battery Power Boards for Tool Battery Packs
              1 XBox 360 Switching Power Supply and M Board
              25 Servo Drives 220/460 3 Phase
              6 De-soldering Station Switching Power Supply 1 Power Supply
              1 Dell Mother Board
              15 Computer Power Supply
              1 HP Printer Supply & Control Board * lighting finished it *


              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
              2 Hem Saw Computer Stack Board

              All of these had CAPs POOF
              All of the mosfet that are taken out by bad caps

              Comment


                #8
                Re: Erbauer 18-24v battery charger

                There some ni-cad chargers out that very easy to use and work fairly well

                https://www.ebay.com/itm/Ni-MH-Ni-Cd...53.m1438.l2649

                One note on this charger you should replace the capacitors in this charger they unknown brands
                Last edited by sam_sam_sam; 09-20-2018, 07:14 PM.
                9 PC LCD Monitor
                6 LCD Flat Screen TV
                30 Desk Top Switching Power Supply
                10 Battery Charger Switching Power Supply for Power Tool
                6 18v Lithium Battery Power Boards for Tool Battery Packs
                1 XBox 360 Switching Power Supply and M Board
                25 Servo Drives 220/460 3 Phase
                6 De-soldering Station Switching Power Supply 1 Power Supply
                1 Dell Mother Board
                15 Computer Power Supply
                1 HP Printer Supply & Control Board * lighting finished it *


                These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                2 Hem Saw Computer Stack Board

                All of these had CAPs POOF
                All of the mosfet that are taken out by bad caps

                Comment


                  #9
                  Re: Erbauer 18-24v battery charger

                  I looked at the link. Charge rate is 1 amp compared to Erbauer of 2.8amp. I'm not going to resort to buying a replacement just yet, not when I have perfectly good robust chargers- just not configured correctly. I shall perserver a bit longer and endevour to find a wiring diagram.
                  Appreciate your help.

                  Comment

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