Sounds like a neat idea, but don’t get lost in the fantasy. If you want it to patch joints on the fly you’ll need a real self‑healing material or micro‑actuators that can operate on the same battery the robot uses. The bigger the system, the more power it needs to repair itself, so you’ll run right into a dead‑end if the battery is already low. Keep the design simple, use off‑the‑shelf actuators, and make sure the repair process doesn’t drain the battery faster than the solar panel can refill it. Otherwise you’ll end up with a robot that’s fixing itself while it’s already broken.