[lnpurnell]

Hi all,

I need some help from the community, we are looking for someone who has stuck an oscilloscope onto the charger during the charging phase and knows the tolerance that Tesla uses for the Voltage and current ripple on its chargers?

We know that the SAE and CHAdeMO standard is usually +/-1% ripple for current and voltage but we cannot find the technical standards of what Tesla charges at.

If anyone has any technical documents on how Tesla does its charger comms handshake and what tolerances their chargers operate at I would be grateful.

Thanks!

Leigh.

 

[dcb]

+/-1% ripple for current and voltage...

Hello,
do you mean line current or battery current?

and do you mean ripple as in 50/60 (100/120) hz? or the carrier frequency ripple?

Do you have a link for this 1% figure?

there is some evidence that a superimposed sine wave (of the correct frequency) to minimize the battery impedance is actually a good thing FYI.

 

[lnpurnell]

Hi dcb,

The current ripple needs to be measured from the DC line out of the charger to the battery, we have now discovered one of the charging ripple has 6amps ripple at 100amps. We need to find out what Tesla can achieve as out current ripple is currently 5amps at 300Hz.

Thanks,

Leigh