Smallest battery suggestions for 6 mile ride and Bafang BBSHD

[Raisedeyebrows]

Should we split this into a separate thread?

That might be a good idea so those interested in using the EGO packs could find the info in the future. I know I'm interested in the topic and hope you make a bunch of male connections.

 

[Alan B]

Excellent.

So the keying is probably related to the current capacity of the pack, and the 2.5 packs have different cells as well as higher capacity so they can handle higher current.

Any idea how much current the mower draws?

 

[Alan B]

This should work. Not pretty, but 3D printing will soften the corners.

Two contact blades are to be attached with M4 screws. The block goes toward the battery and the plate slides into the grooves.

A test print will be necessary to do final fitting.

 

[Alan B]

Here's a pair of the EGO compatible mounts, add a pair of seatpost clamps and mount behind the rider, above the rear tire. The batteries own weight is forcing them down onto the connector blades. Probably would want some additional retention, but it won't take much.

 

[spinningmagnets]

Here is a build where he did what you are working on:

https://endless-sphere.com/forums/viewtopic.php?f=3&t=83525ks

 

[Alan B]

I did a bit more on this concept, a seatpost rack holding two EGO batteries. I like the 2.5AH packs (which I have two of), so that would be 5AH in parallel. I also have two chargers (at least) so could charge them in parallel.

The seatpost clamp design is not very accurate, those would be separately printed and bolted to the battery mount. Seatposts come in many sizes, so those would be printed specifically for the seatpost diameter in use.

The battery mount itself could use more design as well, I would like to support the contact blades on two sides like the EGO connectors do.

 

[Alan B]

Today I'm 3D printing the first prototype of the redesigned EGO battery mount/connector. I made a lot of changes, essentially a complete restart of the design, now I'm fitting it to the real dimensions. This design supports the connector blades on 2 sides, like the factory connectors. The body of the mount sits up higher and has a couple of M6 compatible clearance holes for mounting. This also leaves better clearance for air to get to the cooling slits in the battery.

 

[tomjasz]

Outstanding!

 

[Alan B]

Thanks.

I've started a specific thread for discussing use of the EGO battery and the mount I'm working on. So we don't need to clutter this discussion further.

https://endless-sphere.com/forums/viewtopic.php?f=14&t=93563