Hi..very nice video..Thanks for the video. I have a confusion. My understanding as of now is given below. Correct me if I am wrong. PWM at 9v represents maximum charging current which EVSE can supply. PWM at 6v represent charging current which EV is demanding.
@@bharathkmr35 PWM at 9v means the EVSE is now ready to supply power. If the vehicle is also ready, the vehicle will pull the signal down to 6v by adding additional resistance to the pilot. When the voltage is pulled down to 6v by the vehicle the EVSE will close the relay, assuming all safety checks pass.
@@openevse3739 Hi, thanks for the response. Actually, my query was regarding the interpretation of duty cycle of PWM at 9v and 6v, CP signal of 9 v represents 2 items ie; 9v tells that EVSE is ready for charging (9v) and the duty cycle during 9v signal represents the current what EVSE is capable of supplying. CP signal of 6v represents 2 items: e; 6v tells that car is ready for charging (6v) and the duty cycle during 6v signal represents current what car is demanding. Is it correct?
Hey nice video. What I still dont get it what if the following scenario occurs: Charger sais car can load with 32A Car can only load with lower Ampere (lets say 16A) Is the PWM Signal (Duty Cycle) then beeing changed by the car?
The charging station offers a maximum amount. The vehicle may choose to use less. Many vehicles only have hardware onboard for a certain power level. A 3.3kw vehicle will never charge at higher than 16A no matter how much the station offers.
Hi, great video. Question, when CCS fast charging does the station use the AC communication pins (control Pilot + Proximity Pilot to control the flow of current to the battery? Thanks.
Watch the thumb on the plug, that is where the button is located on the plug. en.wikipedia.org/wiki/SAE_J1772#/media/File:Newone_-_VinFast_electric_charger_by_Phoenix_Contact.jpg
At 5:24 - what is the charge options. Can you explain more please. How can we know station is not ready ? Is this setting for commercial usage or do we have to do this ?
@@muhammetuludag5269 the EVSE signals it is not ready by keeping the pilot at 9v DX. When the EVSE is ready it turns on the 1000hz pilot. The vehicle signals it is not ready by keeping the 1000hz pilot at 9v. when the vehicle is also ready it pulls the pilot from 9v to 6v. The EVSE can also pull the pilot to -9v to signal not ready and due to an error state.
DC Fast charging use PWM at 5% to indicate that the communication will take place digitally, most often power line communication (ethernet over powerline almost).
@@choukoksol8121 the voltage is decided by the circuit. The EVSE can only switch it on or off. The vehicle on board charger is designed to accept power at a wide voltage range usually form about 90v up to 260v.
does the 1k wave actually require -12v. Seems to me it really doesn't, if it go to gnd only the information is identical. Can't seem to find an answer to this question, will have to just try it i guess if nobody else in the world knows the answer...
@@murraymadness4674 The SAE and IEC standards do require the -12v to interact with a diode in the vehicle. It proves the resistance is intentional and not a handle dropped in the mud. The diode blocks the negative portion so the vehicle does not care if it is there or not. While you could hack something together without -12v it ignores an important safety verification and would not be compliant.
@@openevse3739 makes sense, so it will work without the -12v, not selling anything, just getting my $400 leaf to charge up using parts I have on hand. I understand you don't even need a relay, can just run the 120vac always on. I will be building something soon. Thanks for the input.
J1772 Proximity is between handle and vehicle. "Proximity Pilot" in IEC specs is for reading ampacity of cable using resistance from a "Proximity Pilot" pin to ground. The EVSE does need to read IEC "Proximity Pilot".
@@openevse3739 Thanks for your reply. And then EVSE should read IEC "Proximity Pilot" and change the maximum charge current value to the CP PWM signal? Is it the EV role to control charge current level accoring to changed charge cable? Am I wrong?
@@bd300youube Correct. If the resistor value in the cable for "Proximity Pilot" indicates the cable is 16A. The EVSE must limit control pilot to a maximum of 16A even if the station itself is capable of more.
Version 3.x is for the new ESP32 WiFi module..Version 2.8.2 is the latest version for the ESP8266 modules. Source Code and releases for all our products are available on GitHub.
Good! Waiting for more videos about the AC and DC charging.
thanks ! could you please explain about power line communication(PLC)
Nice video! Can you please make video how DC charging works? What protocols are used, etc...
Great suggestion! We will add this to our list.
Sir please explain the power line communication with ccs2 charging station
Hi..very nice video..Thanks for the video.
I have a confusion.
My understanding as of now is given below. Correct me if I am wrong.
PWM at 9v represents maximum charging current which EVSE can supply.
PWM at 6v represent charging current which EV is demanding.
@@bharathkmr35 PWM at 9v means the EVSE is now ready to supply power. If the vehicle is also ready, the vehicle will pull the signal down to 6v by adding additional resistance to the pilot. When the voltage is pulled down to 6v by the vehicle the EVSE will close the relay, assuming all safety checks pass.
@@openevse3739 Hi, thanks for the response. Actually, my query was regarding the interpretation of duty cycle of PWM at 9v and 6v,
CP signal of 9 v represents 2 items ie; 9v tells that EVSE is ready for charging (9v) and the duty cycle during 9v signal represents the current what EVSE is capable of supplying.
CP signal of 6v represents 2 items: e; 6v tells that car is ready for charging (6v) and the duty cycle during 6v signal represents current what car is demanding.
Is it correct?
can u explain on duty cycle for the amps between 51 - 80, the formula u shown was amps = (dutycycle-64)2.5 , how this 64 and 2.5 been taken.
Hey nice video.
What I still dont get it what if the following scenario occurs:
Charger sais car can load with 32A
Car can only load with lower Ampere (lets say 16A)
Is the PWM Signal (Duty Cycle) then beeing changed by the car?
The charging station offers a maximum amount. The vehicle may choose to use less. Many vehicles only have hardware onboard for a certain power level. A 3.3kw vehicle will never charge at higher than 16A no matter how much the station offers.
Hi, great video. Question, when CCS fast charging does the station use the AC communication pins (control Pilot + Proximity Pilot to control the flow of current to the battery? Thanks.
Control pilot and proximity pilot are communication pins used in both AC and DC charging.
These pins are not for power transfer
In the proximity section of the video, what is the "button" you mentioned about ? 9:40
Watch the thumb on the plug, that is where the button is located on the plug. en.wikipedia.org/wiki/SAE_J1772#/media/File:Newone_-_VinFast_electric_charger_by_Phoenix_Contact.jpg
When the car is done charging, does the control pilot go back to 9V or stay at 6V?
9v
At 5:24 - what is the charge options. Can you explain more please. How can we know station is not ready ? Is this setting for commercial usage or do we have to do this ?
@@muhammetuludag5269 the EVSE signals it is not ready by keeping the pilot at 9v DX. When the EVSE is ready it turns on the 1000hz pilot.
The vehicle signals it is not ready by keeping the 1000hz pilot at 9v. when the vehicle is also ready it pulls the pilot from 9v to 6v.
The EVSE can also pull the pilot to -9v to signal not ready and due to an error state.
Thanks for sharing! I had a question: Who generates the pilot signal - is it the EVSE or the vehicle?
The EVSE
How would the PWM signal work for DC fast charging where the current can be very high?
DC Fast charging use PWM at 5% to indicate that the communication will take place digitally, most often power line communication (ethernet over powerline almost).
Hello! Can You explain how the car can accept 120 or 220V? Is it decide by the charger, or the car? Is it automatically recognize or need some signal?
All cars can take both. It's up to the on board charger to work out what to do with it
@@choukoksol8121 the voltage is decided by the circuit. The EVSE can only switch it on or off. The vehicle on board charger is designed to accept power at a wide voltage range usually form about 90v up to 260v.
The current limit is indicated by the PWM signal how about the voltage values how it is communicated?
I’m at the same problem…
Did you understand how the station see the voltage level?
I mean, when it isn’t using PLC.
The voltage is whatever is on the circuit. The EVSE can only switch it on or off. If the mains are 240v then the vehicle gets 240v.
does the 1k wave actually require -12v. Seems to me it really doesn't, if it go to gnd only the information is identical. Can't seem to find an answer to this question, will have to just try it i guess if nobody else in the world knows the answer...
@@murraymadness4674 The SAE and IEC standards do require the -12v to interact with a diode in the vehicle. It proves the resistance is intentional and not a handle dropped in the mud. The diode blocks the negative portion so the vehicle does not care if it is there or not. While you could hack something together without -12v it ignores an important safety verification and would not be compliant.
@@openevse3739 makes sense, so it will work without the -12v, not selling anything, just getting my $400 leaf to charge up using parts I have on hand. I understand you don't even need a relay, can just run the 120vac always on. I will be building something soon. Thanks for the input.
In case of proximity pilot, does it need to control on evse side? Both ac and 15118 dc charging, It is a job bewteen the connector and ev. Am I right?
J1772 Proximity is between handle and vehicle. "Proximity Pilot" in IEC specs is for reading ampacity of cable using resistance from a "Proximity Pilot" pin to ground. The EVSE does need to read IEC "Proximity Pilot".
@@openevse3739 Thanks for your reply.
And then EVSE should read IEC "Proximity Pilot" and change the maximum charge current value to the CP PWM signal?
Is it the EV role to control charge current level accoring to changed charge cable? Am I wrong?
@@bd300youube Correct. If the resistor value in the cable for "Proximity Pilot" indicates the cable is 16A. The EVSE must limit control pilot to a maximum of 16A even if the station itself is capable of more.
You have wifi 3.0.1 firmware. Where can I download it? I have 2.8.2
Version 3.x is for the new ESP32 WiFi module..Version 2.8.2 is the latest version for the ESP8266 modules. Source Code and releases for all our products are available on GitHub.