Sony Aibo ERS-210/220 Robot Dog 18650 Replacement Battery Case
Description
*WARNING:* Battery recells are complicated projects that require prior experience with soldering, dissasembly, and general electronics knowledge. Unlike other vintage electronics, the Sony Aibo still has support from repair companies that can do the work for you. The extra cost of paying a professional is worth the risk of possibly injurying yourself or your robot. **DIY at your own risk!** ###Background### Got myself a Sony Aibo ERS-210, which has been on my bucketlist for years. It's an original model that came straight from japan, complete with it's box and accessories. long story short It's everything I love about vintage electronics, from their retro-futuristic design to their continued community support despite the fact they came out more than 2 decades ago. This is crucial, as they suffer from failing clutches in their head servos, and now long-dead batteries. I've already repaired my dog's servos thanks to the new clutches sold by aiboclinic.net, but I've decided not to pay for a recell, and do the job myself. On Youtube I ran into a video by Mjltech, (linked in parts list,) Who does an amazing job at showing a simple way to do the recell without having to weld cells. This allows new cells to simply be swapped in when these replacements inevitably go bad. Only issue was the 3D printed case he used in the video was from some random person in a discord, who you'd have to try to reach out to to get the STL. I decided not to even try that, and just make my own. Most importantly I wanted to utilize much more common 18650 cells instead of the 18500s used in their's, which just makes part sourcing cheaper and easier. ###Parts List### Original Instructional Youtube video by Mjltech: (Has links in the description for most of the parts needed) https://www.amazon.com/Organizer-Socket-Adpter-Programmer-CH341A/dp/B07R5LPTYM/ref=sr_1_3?crid=UT5H9J65TQPD&keywords=ch341a&qid=1696644580&sprefix=ch341a%2Caps%2C113&sr=8-3&th=1 * Soldering equipment * CH341A USB EEPROM Flasher * 4 Metric stainless steel screws, 2 M2x8, 2 M2x12 (Used to hold case together) * 4 Spring steel nickel-plated leaf spring battery contacts * 2 18650 Lithium-Ion Cells (DON'T BUY BATTERIES FROM AMAZON, they only sell crappy chinese knock-offs that won't last. I used 18650batterystore.com and they're great. I recommend Samsung 30Q 3000Mah Batteries, but you could get a higher mah count.) * Wire * Dead ERA-201B1 battery (used for the battery management board.) ###Printing### Lay either part with the outer face flat on the buildplate. The bottom half is already oriented the right way, but you need to flip the top half. I'd use a brim so the corners don't warp, specifically at least 8mm. Both parts need a little support material on parts like the connector end, which is off the buildplate by only half a millimeter. I wouldn't recommend using supports in the screw holes or the latch divots, as they'll end up being very difficult to remove. PLA worked fine, but if you need extra rigidity go with PETG. ###Assembly### The actual assembly of the battery is identical to how Mjltech does it in his video, so follow that as a guideline. Only differences are the slightly longer cells, and the screws- which should be self-explanatory. longer ones go into the flat side, and the shorter ones go into the curved side. Other than that, you should be able to follow his instructions without any problems. Hopefully this helps out anyone who wanted to get their dog going themselves, and didn't want to spend a ton. Happy printing!
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