Dienstag, 20. Mai 2014

Buddy Balance

I am checking and balancing 22 Calb CA60 cells for a friend.
First I am checking each cell voltage and label it. There was one cell with a higher voltage.
While I was charging the whole pack in series, I already had to balance this cell with a 0,1 ohm resistor because the voltage was going up in the sky.
At the end I had a pregnant cell.
A sure sign for a dead cell.(

Donnerstag, 6. März 2014

EVDrive 31/2013 Half Turn - Double Force (How to double the spring press...

How to double the spring pressure in a WarP9
It's long, it's tough. it's boring....but I had to figure out how to do it.
And all the failures show how it does not work.

Mittwoch, 5. März 2014

Tesla Fuse Connection

Tobias  has a battery module from a Tesla Roadster.
The 18650 batteries are connected with a small wire to the main board that works like a fuse. When the current is getting too high because of a bad cell, the wire melts and this battery is out of the pack.

Donnerstag, 6. Februar 2014

La Siesta Mexicana

Three weeks holiday. Even when it's not easy not to be electric.)
First time in Mexico.
Love it.