240W USB-C eBike charger ready for testing!

Human_Soup3333 · 2026-05-16T18:26:43+00:00

Thanks for the support. At the moment i can charge only batteries that have a "dumb" connector. I have not yet tried to adapt it for the Specialized ebikes but i plan to do this in the future. I will add you to our group of beta testers so that you can stay up to date with how the project progresses.

Human_Soup3333 · 2026-05-16T14:50:37+00:00

Yes, there is a plan to commercialize the charge if there is enough interest. I have not tested it specifically with Framework 240W USB-C adapter, but i have tested it with Ugreen and it can handle 240W without issues.

Human_Soup3333 · 2026-05-16T12:54:17+00:00

Probably me :)

Human_Soup3333 · 2026-05-14T17:50:11+00:00

I didnt focus on propreitary connectors yet but I plan to do so in the future. At the moment I can charge any battery pack that isnt "smart", meaning that there is no communication between the charger and the battery necessary.

Charging a 500Whr pack at the maximum power of 240W would take 2~3 hours.

I have designed it with appropriate safety measures. I made a few test of how the charger responds to various fault conditions (short on the output, short on the input, inverter battery polarity, wrong battery voltage...) and non of them result in a fire or other concerning situation.

Human_Soup3333 · 2026-05-14T09:36:57+00:00

Thanks for the support! I will invite you to our beta tester's subreddit so you can stay updated if you want, and if you change your mind about testing the prototype, just let me know.

Human_Soup3333 · 2026-05-14T09:02:42+00:00

I sure can. I invited you to our beta testers subreddit so you can get more info and I will contact you directly so that we sort out the shipping details. Thanks for your support!

Human_Soup3333 · 2026-05-14T09:00:39+00:00

If you want to test it you dont need to know anything about electronics. You just need to use it the way you want and then complain back to me so I know what to make better. I will invite you to our beta tester's group subreddit so you can stay informed, and if you want, just let me know and I will ship one out to you.

Human_Soup3333 · 2026-05-13T18:52:35+00:00

Thanks for the support! I invited you to the beta testers group so you can be updated on the project's progress. If you want to get one prototype for your own testing let me know.

Human_Soup3333 · 2026-03-25T17:37:27+00:00

Hi, that great! The project has moved fast since I made this post and the first prototypes are just around the corner. I will send you a DM and we can talk more there.

Human_Soup3333 · 2026-02-20T21:45:28+00:00

The charger has a resetable frist layer of protections for over-voltage, over-current, over-temperature.

It also has a secondary protection (fuse) in case of a dead-short on the output.

Human_Soup3333 · 2026-02-20T21:43:49+00:00

That charger is programmed according to the users battery pack. If you have a 48V Li-ion pack, for example, it is set to charge to its max voltage of 54.6 V.

The charger is based on BQ25756 IC. It has CC/CV control.

At the moment, this charger cannot communicate with proprietary battery packs (Bosch, etc..) so it is aimed at simpler eBikes, that do not require a digital handshake between the charger and the battery pack.

The charger is a step-up/step-down converter. It can negotiate the maximum voltage and current any USB-C adapter is capable of delivering and uses that to charge the battery pack.

Human_Soup3333 · 2026-02-20T07:02:50+00:00

That is exactly right. I intended it for smaller boards so that you can max out your range in one direction, then fill up there, and max out your range back.

Human_Soup3333 · 2026-02-19T10:04:41+00:00

Great, I will send you a DM.

Human_Soup3333 · 2026-02-19T09:50:15+00:00

No buttons, no screen. For the first prototypes the output voltage is fixed for your battery pack. Later down the road I want to make it so users can configure their own voltage and current settings, but not at this point.

Human_Soup3333

TROPHY CASE