USB-C Charger for eSkates

A while ago I made a few post with the idea to make a USB-C charger for our eBikes/eScooters/eSkates. This lovely community was good enough to financially support me with my idea and we have sucessfully developed the first version of the prototypes. Now I am looking for anybody else who wants to give USB-C charging a try.

Here is the initial post on Reddit I made about the project

https://www.reddit.com/r/ebikes/comments/1r83wn8/beta_testers_wanted_usb_ebike_charger/

Like before, I offer the charger without profit. The material cost is 50 USD and world-wide shipping is 20 USD. There are only a limited amount of prototypes left so I will send them out first come first served.

To achieve the maximum 240W of charging you will have to mount the charger PCB on a heatsink. A lot of users also mounted it on big metal surfaces that provided adequate cooling. I will provide the charger, and the thermal pad to put in between the charger and the heatsink, you just make the holes and screw it tight.

Here is a picture of the Charger mounted on a heatsink and charging at the 240W of power.

We already have a group of beta testers on Reddit (https://www.reddit.com/r/USBchargingBetaTester/). If you want to you get one for yourself or just want to stay updated let me know and I will add you to the group.

Happy riding!

Samo

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A suggestion.
You can print the case with thermo conductive filament and transfer the heat to the case. Glue it with thermal conductive tape since the filament is also conductive. (Be careful) Amazon.com: TCPoly Ice9 Nylon Thermally Conductive Carbon Graphite 3D Printing Filament 1KG Spool (1.75 mm, 1000g) : Industrial & Scientific

I am assuming you are using a buck converter with a PD 3.2 trigger. 48V @ 5.2A to get the max of USB-C and then converting to any desired voltage.

Question. How much is your power lost in transmission? How efficient is?

Hi, thanks for your suggestion.

The power loss is around 6W from input to the battery, that is roughly 97.5% efficient. I plan to reduce the losses to 3W in the next version so that I can have a smaller case.

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Following you !!