Generation 1 HPWC not working with Cybertruck

[Spacenoddle]

How hard is a leakage like that to detect?

Defected 14-50 adaptor come with the CT. I need to replace it from SC to make it work.

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[Crissa]

The Wall Connector uses a resistor loop to tell the car what amperage is available.

It's possible it was getting an out of spec resistance read at 100a, hence the suggestion to lower it.

-Crissa

 

[Obie_fl]

Strange that we have two cases where the Gen 1 HPWC isn't getting to 48amps after lowering the DIP switches to 90amps.

I have a GEN 1 (40Amp) mobile connector that I haven't tried on the truck yet but will check and see if it does 40amps with the truck.

 

[mongo]

The Wall Connector uses a resistor loop to tell the car what amperage is available.

It's possible it was getting an out of spec resistance read at 100a, hence the suggestion to lower it.

-Crissa

You may be thinking of the Mobile Connector adapters. Wall Connector to vehicle uses standard J1772 style PWM duty cycle signaling to indicate maximum charge rate. 80A is 96% duty which may be tripping the signal valid check in the Cybertruck.

Resistors are also used to indicate connection and handle button state.

https://www.fveaa.org/fb/J1772_386.pdf

 

[Crissa]

You may be thinking of the Mobile Connector adapters. Wall Connector to vehicle uses standard J1772 style PWM duty cycle signaling to indicate maximum charge rate. 80A is 96% duty which may be tripping the signal valid check in the Cybertruck.

Resistors are also used to indicate connection and handle button state.

https://www.fveaa.org/fb/J1772_386.pdf

No.

The J1772 just uses a resistor loop to the vehicle at its simplest to communicate the EVSE's amperage available.

100a is 200% the amps that the Cybertruck can pull.

-Crissa

 

[mongo]

No.

The J1772 just uses a resistor loop to the vehicle at its simplest to communicate the EVSE's amperage available.

100a is 200% the amps that the Cybertruck can pull.

-Crissa

Are you referring to the Proximity Pilot resistor used for untethered EVSE to indicate the limit of the cable?

 

[Crissa]

Are you referring to the Proximity Pilot resistor used for untethered EVSE to indicate the limit of the cable?

Your statement is kinda nonsensical. 'Untethered' usually means 'the cable isn't attached'.

Clearly we're not using the same words to mean things.

-Crissa

 

[mongo]

Your statement is kinda nonsensical. 'Untethered' usually means 'the cable isn't attached'.

Clearly we're not using the same words to mean things.

-Crissa

Not nonsensical, that's exactly what untethered means. Certain styles of EVSE in Europe do not have the EVSE to vehicle cable permanently attached and drivers use their own. In these situations, the cable has a resistor in the proximity pilot circuit to indicate the maximum current the cable supports. The vehicle then limits itself to the maximum of the EVSE's limit expressed as a PWM and the cables limit.
https://en.m.wikipedia.org/wiki/SAE_J1772

https://en.m.wikipedia.org/wiki/IEC_62196

Maybe it would be faster for you to post a link showing what resistor based current advertising system you are referring to. I'm only finding references to the J1772 PWM duty cycle based setup.

 

[Crissa]

Not nonsensical, that's exactly what untethered means. Certain styles of EVSE in Europe do not have the EVSE to vehicle cable permanently attached and drivers use their own. In these situations, the cable has a resistor in the proximity pilot circuit to indicate the maximum current the cable supports. The vehicle then limits itself to the maximum of the EVSE's limit expressed as a PWM and the cables limit.
https://en.m.wikipedia.org/wiki/SAE_J1772

https://en.m.wikipedia.org/wiki/IEC_62196

Maybe it would be faster for you to post a link showing what resistor based current advertising system you are referring to. I'm only finding references to the J1772 PWM duty cycle based setup.

...Which is also how it transmits the cabinet amperage to the vehicle.

I'm not sure why you're focusing on this.

-Crissa

 

[mongo]

I'm not sure why you're focusing on this.

Because you said:

The Wall Connector uses a resistor loop to tell the car what amperage is available.

and that is not my understanding, so either I need to correct my thinking or not. Thus the desire to find out the facts via industry reference. I've provided two for J1772 that show the currently level is set by a PWM's duty cycle and that cables in Europe use a resistor to indicate the cable's capacity (at a very coarse level).

...Which is also how it transmits the cabinet amperage to the vehicle.

Cabinet implies DC fast charging which was CAN bus for Tesla originally and is Power Line Communication for CCS and NACS.

 

[Crissa]

Cabinet implies DC fast charging which was CAN bus for Tesla originally and is Power Line Communication for CCS and NACS.

Okay, at this point you're not adding anything to the conversation.

Your understanding is too narrow and not helpful.

A 'cabinet' is literally, 'a box'. Yes, they do use it for shorthand for the off-vehicle charger in some DC charging. Because it has a 'cabinet' filled with electronics which can be separate from the dispensing unit.

No, it has nothing to do with CAN. No, 'a cabinet' can be any utility box, including the EVSE which has 'a cabinet' and optionally 'a cable'. Literally all EVSEs have a box they keep their electronics in. It's just a synonym.

How do you think an EVSE transmits the amperage available to the vehicle's charger?

-Crissa

 

[mongo]

How do you think an EVSE transmits the amperage available to the vehicle's charger?

Like I posted earlier:

Wall Connector to vehicle uses standard J1772 style PWM duty cycle signaling to indicate maximum charge rate. 80A is 96% duty which may be tripping the signal valid check in the Cybertruck.

Resistors are also used to indicate connection and handle button state.

https://www.fveaa.org/fb/J1772_386.pdf

But here's another: https://www.electronicdesign.com/ma...-the-sae-j1772-and-ccs-ev-charging-interfaces

Once CP-PE continuity is detected, the charging station begins to transmit a variable pulse-width-modulated (PWM), 1-kHz square wave to the CP pin (±12.0 ± 0.4 V), which uses its duty cycle to inform the vehicle about the maximum charging current it can supply.

For example, if the vehicle sees a 16% PWM signal, the charger can supply 10 A maximum, 25% PWM indicates a 16 A maximum and 50% PWM indicates that up to 32 A is available. A PE signal with 90% PWM indicates that the charger can also support dc fast charging if the vehicle is equipped with a Combined Charging System (CCS) Combo connector. The basics of CCS will be discussed in the following section.

Now please post a reference to support your statement that Wall Connectors use a resistor to tell the vehicle what the charge limit is.

 

[swengl]

One last note about my issue: Before/after the DIP switch change, our Model Y consistently charged at 48A. I am pretty sure the Model Y is not using the 4680 batteries (although it was made in Austin). I wonder if the 4680s are the reason why the CT won't charge at the highest rate?

 

[mongo]

One last note about my issue: Before/after the DIP switch change, our Model Y consistently charged at 48A. I am pretty sure the Model Y is not using the 4680 batteries (although it was made in Austin). I wonder if the 4680s are the reason why the CT won't charge at the highest rate?

Doubtful, my Cybertruck charges at 32A with the mobile connector, and Superchargers much faster than that.
Does the screen say 24/24 or 24/48 when charging?

 

[Obie_fl]

Random data point. I just plugged my truck into my Gen 1 mobile charger and I am getting the expected 40Amps.

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