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634 points david927 | 2 comments | | HN request time: 0.414s | source

What are you working on? Any new ideas that you're thinking about?
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oulipo ◴[] No.41344737[source]
Hey guys! We're engineers/designers from France, and we've built the Ultimate DIY Battery that you can repair and refill!

It works with 90% of the bikes/motor brands on the market, so I assumed that some people here might be interested, if they got a non-functional batteries but they still want to use their e-bike?

We believe that everybody should have control about stuff they own, and we should fight against planned obsolescence!

Here are a few videos about our founder on the battery itself, why we built it, and how to assemble it:

- What is the Gouach Battery: https://www.youtube.com/watch?v=NsuW1NPkvNk

- Presentation of the pack: https://www.youtube.com/watch?v=mLoCihE0eIA

- Presentation of the fireproof and waterproof casing: https://www.youtube.com/watch?v=EDJpt7RDbRM

Here are the juicy bits: https://docs.gouach.com

We'd love some feedback from the e-bike DIY builder community

Oh, and it's launching as a Kickstarter in September and there is an offer for early-backers here https://get.gouach.com/1 for a 25% discount on the battery!

You can follow us on Instagram https://www.instagram.com/gouach.batteries to get the latest news!

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1. ulnarkressty ◴[] No.41345554[source]
It's a very nice concept and I think it's much better than the held-together-with-duct-tape concepts usually seen in diy bike conversions.

That being said, I am a bit skeptical about your claims to be fireproof. Did you try to start a battery fire inside your enclosure? Aluminum melts at about 600C, while lithium burns much hotter than that.

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2. oulipo ◴[] No.41389321[source]
Thanks so much!!

Yes, it works because we're using a thick aluminum casing and a specific design to evacuate heat fast

Videos coming soon!