Tag: internal construction

CITYSAX 160Ah LiFeYPO4 battery discharge and teardown (WHL #51)

Speaking of electric cars: A colleague recently bought a used electric car and (obviously!) contacted me in order to diagnose/troubleshoot it. Sadly he was able to sell it for a profit before we got it fully fixed, so no live data recordings, no power/torque graphs, no nothing to show here. But he left me a dead cell for which he got a replacement from the seller right away, as the traction battery had voltage dips under load that indicated (at least) one damaged cell.

If servicing individual battery cells sounds a bit strange for a modern electric car, that’s because we’re talking about a CITYSAX from a company that is conveniently named the same. […]

8th September 2019 8th September 2019 By Bzzz In No Comment

3590S-2-103L 10K Ohm Rotary Wirewound Precision Potentiometer Pot 10 Turn vs genuine Bourns and Vishay pots (WHL #36)

Visiting the dark side of China today – product piracy.

First things first, I actually bought this item twice from two different sellers on AliExpress. One back in September for 1.07€ and now two more for 0.95€ each in early January, just to be able to kill one during inspection. The seller may be the same (I’ve seen that recently from BME280 sensors, review to come), but the shop name is different. It is intended as replacement for the current adjustment knob on my electronic load, as I am an idiot and during build I set the voltage over the pot not to the two end pins, but to one pin and the wiper. […]

25th February 2018 24th February 2018 By Bzzz In 1 Comment