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2.X to 2.8 Battery Tube Upgrade Kit

Steps to upgrade any v2.5, v2.6 or v2.7 OpenROV to have the twist lock battery tubes that come standard on a v2.8 OpenROV.

  • Author: OpenROV
  • Time estimate: 2 hours
  • Difficulty: Moderate

The kit is available on the OpenROV Webstore.

Edit Step 1 Front Battery Endcap  ¶ 

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Edit Step 1 Front Battery Endcap  ¶ 

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Image 1/2: You can also use a screwdriver if your motors are already attached. Image 2/2: You can also use a screwdriver if your motors are already attached.

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  • We are going to use the motor as a centering pin for the endcap.

  • You can also use a screwdriver if your motors are already attached.

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Edit Step 10 Battery Tube Preparation  ¶ 

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Edit Step 10 Battery Tube Preparation  ¶ 

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  • Peel off the paper backing.

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  • When working with acrylic cement it is recommended that you wear gloves, safety glasses, and work in a ventilated area.

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Image 1/1: When working with cyanoacrylate (super glue) it is recommended that you wear gloves, safety glasses, and work in a ventilated area.

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  • Use superglue.

  • When working with cyanoacrylate (super glue) it is recommended that you wear gloves, safety glasses, and work in a ventilated area.

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Image 1/1: Don't let this sit in this position to dry or it will become stuck to the paper towel.

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  • Apply pressure to the outside ring so it is flush with the front of the tube.

  • Don't let this sit in this position to dry or it will become stuck to the paper towel.

  • If any glue got on the inside of the tube, wipe it off.

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Edit Step 21 Battery Tube Back  ¶ 

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Edit Step 21 Battery Tube Back  ¶ 

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Image 1/1: (2x) 20cm

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  • Cut the lengths of wire into:

    • (2x) 20cm

    • (2x) 50cm

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  • Strip the 20cm piece on one end.

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  • Do your best to make these parts concentric.

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  • Do your best to make these parts concentric.

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  • Make sure the wire goes through the bigger of the two holes.

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  • If the battery tube is a little tight you can sand the inside corner to debur the edge.

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  • Make sure cement is the entire way around.

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Edit Step 53 Battery Tube Front  ¶ 

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Edit Step 65 Battery Tube Epoxy  ¶ 

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Image 1/1: When working with epoxy it is recommended that you wear gloves, safety glasses, and work in a ventilated area.

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  • Use epoxy to fill the end of the battery tube.

  • When working with epoxy it is recommended that you wear gloves, safety glasses, and work in a ventilated area.

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  • The epoxy will flow through the entire cavity.

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  • Fill until it comes out of the hole with the wires.

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  • The epoxy will settle after a while and the level in the hole will go down. Check back after 30 minutes and fill with more epoxy in this hole.

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  • Let the epoxy set for a few hours.

Edit Step 72 Front Battery Tube Endcap Epoxy  ¶ 

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Edit Step 72 Front Battery Tube Endcap Epoxy  ¶ 

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  • Fill until epoxy comes out this end.

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  • Let the epoxy set for a few hours.

Edit Step 79 Attaching Battery Tubes  ¶ 

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Edit Step 79 Attaching Battery Tubes  ¶ 

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Edit Step 80  ¶ 

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  • If you have an OpenROV v2.6 you will not have the straps holding your batteries to the side of the frame.

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  • If you have an OpenROV v2.6 remove the zip-ties that are holding the battery tubes to the side of the frame.

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  • Notice that these are mirror images of each other.

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Image 1/1: If you have an OpenROV version 2.6 you will need to mark the positive and negative wires to keep them matched.

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  • Cut to a length of 3cm from the back of the battery tube.

  • If you have an OpenROV version 2.6 you will need to mark the positive and negative wires to keep them matched.

    • The wire that goes to the front of the tube is positive.

    • The wire that goes to the back of the tube is negative.

Edit Step 93  ¶ 

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Edit Step 94  ¶ 

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  • Mark the negative wire with a sharpie near the base of the battery tube.

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  • Cut to a length of 3cm from the back of the battery tube.

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Edit Step 101  ¶ 

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  • Match the negative wire to to the length with the sharpie mark.

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  • Make sure the inside lining is completely melted and oozes out each end.

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  • Cut to a length of 3cm from the back of the battery tube.

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  • Mark the negative wire with a sharpie near the base of the battery tube.

Edit Step 106  ¶ 

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  • Cut to a length of 3cm from the back of the battery tube.

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Edit Step 112  ¶ 

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  • Match the negative wire to to the length with the sharpie mark.

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Edit Step 114  ¶ 

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  • Make sure the inside lining is completely melted and oozes out each end.

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  • If you have an OpenROV v2.6 these will extend past the back of the shell.

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  • The third endcap is an extra one.

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You're Done!

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