Sewing – LHelge

Last weekend we borrowed a sewing machine to make new curtains for the apartment. When I was sewing the curtains I realized that It wouldn’t be very difficult to make a custom battery bag for my e-bike. I would like a bag that I could mount in the frame triangle and have room for 4 Turnigy 6S 5Ah batteries. Doing some measurements, calculations and drawing I came up with this design

Battery bag drawing — An outline of the battery bag, the red triangle is the frame, the blue rectangles are batteries and the gray rectangle is the controller mounted on the frame.

I went to the fabric store and found a black nylon fabric that had a PVC layer on one side. This should be fairly water resistant and I plan to spray it with some textile waterproofing spray as well. I was recommended to use a thread for furniture which is much stronger than ordinary thread as well. A couple of hours thinking, cutting, and sewing later:

Battery bag — I use some Depron in the bottom, and some foam in the two corners to protect the batteries and fill out the bag.

Zipper — The zipper has a bit of fabric folding over it for water protection

Hole for cable — The hole for the cable is also waterproof since the side of the bag overlaps ~10 cm where the cable comes out.

Cable — I'm using the cable I made for the E-Puch. This cable is for two turnigy batteries in series and two in paralell with a 60A fuse. The LEGO part is just for size reference.

Packed — Everything fits nicely inside the bag

The bag fits perfect on the bike!

Pleas write a comment if you think I should make some kind of drawing and description on how to make a bag like this.

Tag: Sewing

Battery bag for my E-Bike