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Ask HN: What are you working on (August 2024)?

634 points david927 | 4 comments | 24 Aug 24 22:00 UTC | HN request time: 0.672s | source

What are you working on? Any new ideas that you're thinking about?
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oulipo ◴[25 Aug 24 05:47 UTC] 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. k4rli ◴[25 Aug 24 06:13 UTC] No.41344846[source]▶
Would order instantly. I have a bunch of e-scooter 18650 battery packs that would be nice to convert to an e-bike one.

If Kickstarter is starting in Sept, then I guess it will be another 1-2 years.

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2. samstave ◴[25 Aug 24 13:07 UTC] No.41347021[source]▶
>>have a bunch of e-scooter 18650 battery packs

Where get?

There is a guy that rides the trail near me thats riding an ebike with a triangular battery pack that looks identical to one some HNer built here - He's too fast and I havent been able to stop him.

Another question for the DIY e-bik crowd, is what kind of OTS motor could one harvest, like a motor from an electric lawm mower, or edger, weed-wacker? Are there power tools where the electric motor is useable? (like how people originally used mower engines in goKarts and such?

Also, for fireproofing - mix Powdered Aerogel into a Silicon Slurry and dip the battery in that - the silicon and aerogel will make a heat sleeve thats quite fire resistant.

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3. _Microft ◴[25 Aug 24 17:52 UTC] No.41349491[source]▶
> riding an ebike with a triangular battery pack that looks identical to one some HNer built here

You might be thinking of jacquesm and this bike:

https://jacquesmattheij.com/long-range-ebike/

4. oulipo ◴[29 Aug 24 06:58 UTC] No.41388097[source]▶
Thanks for your message! The battery is already designed and in production, it's running on 1500 free-floating e-bikes in France without issues since around 2 years

We're doing a Kickstarter because we're a startup so we need the upfront money to buy the parts and build the battery! We expect to ship to Kickstarter customers in November 2024!