Understanding the Tesla Model S Power Electronic Components
Join me on a journey through 74 feet (22.56 meters) of high voltage cable through 10 different power electronics components of a 2015 and later Tesla Model S AWD.
TIMELINE:
0:00 Start
0:10 Introduction
0:50 Model S cables and common components
1:16 MUST SEE Orange cable core and shielding
2:38 Common component 1 - The Charge Receptacle
4:00 The charging receptacle cable size (50 sq mm) compared to the Tesla Model 3 cable size (95 sq mm)
6:12 Common component 2 - The On-Board Charger Module (48A 11.52 kW)
7:48 Single Phase or three-phase power input ports
10:10 The Interlock circuit
11:50 See the internal parts and connections of the on-board charger
12:28 MUST SEE The AC power input path through the on-board charger
12:55 AC voltage needs to be boosted to ~400V
13:39 The DC power output path through the on-board charger
14:10 The DC power input path through the on-board charger
14:32 The DC contactors used when supercharging the battery
15:47 A Safety Warning that should have been at the start of the video
16:54 The DC output from the on-board charger
17:26 Common component 3 - The Rapid Splitter (Front Junction Box)
17:50 The connection to the high voltage battery through the rapid splitter
18:22 The function and internal connections of the Rapid splitter
22:20 The position of the Rapid Splitter in the vehicle under the rear seat
22:50 Common component 4 - The rear motor inverter
24:54 Summary of the high voltage components in the rear of the vehicle
25:48 MUST SEE Pyrofuse Pack battery cable tag and pyrotechnic fuse
26:22 The standard 1300 amp fuse
26:40 The 2000 amp pyrotechnic fuse and its internal components
30:30 Why the battery fuse is needed
31:45 The high voltage components and cables at the rear of the vehicle
32:28 Common component 5 - The High Power Distribution Module (HPDM) (Front junction block)
33:20 See the four internal fuses and circuit board inside the HPDM
34:22 Another Interlock switch
34:48 The battery coolant heater control circuit
35:48 The high voltage connections from the Rapid Splitter to the HPDM
36:49 Common component 6 - The front motor inverter
38:17 The NVH Mat covering the front Drive Unit and motor
39:55 Common component 7 - The electric air-conditioning compressor (40A Fuse)
41:23 Common component 8 - The 2500 Watt DC to DC converter (30 A Fuse)
42:05 DC to DC converter output of 178 amps at 14 volts
43:03 the DC to DC converter charges the 12V battery
44:16 Common component 9 - The high voltage battery coolant heater (30 A Fuse controlled)
46:18 Common component 10 - The Positive Temperature Coefficient (PTC) Cabin Air Heater (40A Fuse)
48:18 The high voltage components and cables at the front of the vehicle
49:29 Almost all Electric Vehicles (EV) have the same common components shown in this video
50:39 Additional EV training is available for you.
51:12 Wrap up and summary
ABOUT US
Weber State University (WSU) Davis Campus - Automotive Technology Department - Advanced Vehicles Lab. A technical description and demonstration of the Tesla Model S Power Electronics cables and components. We teach current vehicle technologies to our automotive students at Weber State University and online. For more information visit: www.weber.edu/automotive
This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see www.weber.edu/automotive/J_Kel...
Visit my other youtube channel / vibratesoftware to see the amazing NVH app for vibration diagnosis!
ADDITIONAL TRAINING FOR YOU
Join us for hybrid and electric vehicle training with two online courses and in a 5-day on-campus boot camp with Professor John D. Kelly. See www.weber.edu/evtraining
DONATE TO OUR DEPARTMENT
Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive
As a Tesla employee, it is actually insane how well done this video is made and is actually really impressive how you were able to explain this so well without any schematics or trainings.
Thank you very much
How many power from 3 phase system can be used for charging? (230V AC) 11kW or 22kW, M3 (End of this year I will buy a M3). Greetings from bavaria,
Yes he’s a master instructor! He is the reason why KZhead can be much more with quality instructors like him.
Not really
@@YTUSER583 I just fitted 10 change points at a factory and they were 3 phase 11kw I was told only the roadster can take 22kw series 3 is 11kw
The man is an absolute goldmine of explanation power.
Thank you very much
I watch the videos and take notes...and then what the video again!
@@luisrobertocordero3361 Don't want to miss anything!
Absolutly. Get a paypal option to donate and I could send some appreciation for this excellent work.
Exactly. The right pace, the right order of info, and nothing irrelevant. Fantastic!
Thank you so much for producing these videos for people who do not attend Weber State. This is really high quality stuff and it's very enjoyable with you as a presenter!
Thank you very much
...or for people who still drive a year 2000 toyota,,,.I like to see how my bearings will fail. Thanks.
For all my comments. This really is high quality, understandable, stuff. I am sold now on the Tesla. Seriously. Not the automation, but definitely the mechanics! Thanks.
;
@@WeberAuto lĺĺ
I worked 42 years in industrial electronic controls with “Big Oil” and “Gas” companies. You are an excellent presenter of this technical information.
Thank you very much!
You are so lucky to have had a career.
Your courses are superior to any institutional automotove training I have had in my career, including what is done at the manufacturer level. Your school and students are very lucky to have you, John.
Thank you very much!
You have many admiring students. You are a supurb, world class instructor. You are the Rush Limbaugh of of Weberauto instructors on KZhead. Congratulations Professor John D. Kelly for teaching the latest EV technology, the USA needs more unsung Hero's like you. God bless you and keep up the class act academic profession.
@@lindenschmitt Comparing an excellent electric vehicle instructor to a shoddy anti-EV conservative commentator. Stay classy, KZhead comments.
What are the courses ?
This guy has god level skills of teaching. ...I take a bow to your teaching skills
Thank you very much
I am a professor in France about automation and I think that i am far from a such level of quality of explanation. It is impossible to stop vidéo. Great job, thank You.
Wow, thank you!
When I think of Professor Kelley, one overriding word comes to mind: Clarity.
Thank you very much!
Very well explained
@@babaaammaa8152 mbbjjnjj. Hhjk
@WeberAuto I like it
I’m not even 5 minutes into this video and diggin it. He is an excellent teacher.
Thank you!
@@WeberAuto I got my EE degree well over 20 years ago and my professors were great but I wish that I had videos & case studies like this one. Thanks again!
That pyro fuse is actually much more clever than you let on in your description. The pyro part is identical to the one used on the 12v battery, which is great at handling high current since it’s essentially a very low resistance bus bar, but it’s not at all rated for high voltage. It’s not an issue if it never opens because the voltage drop should always be close to zero. Unfortunately, if opened under load that component alone would experience the full 400V of the battery causing quick melting and a likely "thermal event”. To prevent that, the engineers added the 2 normal HV low amp ceramic fuses you see on either side of the pyro device in parallel. These fuses have a small but non-zero resistance, so they get almost none of the current in normal operation. Those fuses are however rated to fuse the full battery voltage without arc flash, so as the voltage rises during the pyro disconnect the current starts to flow through the fuses instead. Those fuses open the overall battery circuit once they get above 40A without any arc flash. Interesting enough this was just an intermediate design, and in the Model 3 they implemented a pyro fuse that could actually safely handle the full voltage without any of the extra components. I do love the ingenuity that went into this design, great example of a "what do we have lying around here that can solve this problem’?
Excellent information! Thank you!
@@WeberAutoAwesome videos John, thank you. Where is the pyro fuse? Is it built into the battery or next to the battery? What components do you disconnect using safety equipment, to disconnect the high voltage battery from the rest of the HV components system? Is there a disconnect switch that shuts off the HV power, without having to remove the pyro switch or remove cables from the pyro switch? I will be signing up for your online classes and hopefully your on-campus classes.
Also just need to say you do a great job explaining these systems. Overall spot on in your descriptions and even some of the ‘speculations’ are surprisingly accurate. Love the videos!
@@ddmitch1 these fuses are built into the battery and are located at essentially the half way point of the pack. When you remove it it breaks the main circuit and also has the advantage of cutting the highest voltage in the pack in half, making it much safer. In the early Model S/X the fuse is on the top of the battery so it was only removable when the pack was out of the vehicle. The fuse was moved to the bottom in later designs, so it could be accessed when installed in the vehicle, but that made it harder to remove when on the ground out of the vehicle. You however would want to do the normal hv shutdown process before touching this fuse or attempting to remove the battery. That is usually done by disconnecting the first responder loop in the front and disconnecting the 12v battery. The HV battery requires power from the 12V system to close its internal switches and power the rest of the HV system. When those switches are open the high voltage is limited to inside the battery pack.
@@1forrest1 Thank you very much!
I thoroughly enjoy your presentations and to see a Tesla system broken out like this helps me to understand EV’s much better. Thank you.
As someone who loves how it's made videos, tesla's, and being an EE this video is so interesting. Can't wait for the model 3 high power component examination.
Coming soon!
I didn’t see any transformers anywhere so I’m going to assume that the incoming AC is rectified using a full-wave bridge and feeds the source bus of the DC to DC converter to develop the hi-voltage bus. If the incoming source is DC, the same full-wave bridge would route the correct polarity to the corresponding polarity source bus.
The fundamental difference of course between AC and DC charging is the location of the charging current control! For AC charging, being low powered, the current limitation is never really the battery (48 amps of charge current is totally trivial to a battery that can deal with kA of current!) but is the EVSE (Electric vehicle supply equipment, ie the off board charger and supply wiring, the bits normally screwed to the wall of your house). When an AC charger is connected, the pilot signal is used to limit max charging current and to signal the EVSE to close it's AC relay(s) to switch voltage onto the AC inputs of the on-board charger, and from then on, it is the Onboard charger that effectively acts to control actual charging current. It becomes as far as the EVSE is concerned, a varriable impedance to neutral, (it's an isolated AC/DC architecture to deal with the votlage difference and to ensure galvanic isolation between battery and AC supply earth potentials). Normally, you'd expect that system to quickly ramp to the maximum current the EVSE has requested (typically between 12 and 30 Amps) and only to reduce that current when the battery reaches it's State of Charge limit (ie it's fully charged ) At no time is the EVSE "controlling" the charging current, although it can obviously open it's relay and completely stop charging (in the case of a fault, or the user stopping charging) and it can reduce it's max charging limit if it considers some limiting factor to come into play (temperature of the charging handle , cable, or internal temp of the EVSE itself) For DC charging, things are very different. For a start DC charging uses a serial data link (CAN (Tesla/CHADEMO)or GreenPlug HomePhi (CCS)) to continuously arbitrate and exhcange data between the off board charger and the vehicles HV control system. Here, that data link is used to control the charging process, but here the off board charger is responsible for controlling the charging current. It's is the OFF Board charger that requests the vehicle to connect the DC charge harness to the battery, via those large contactors in the on-board charging unit. But before that happens, top avoid excessive inrush currents, the DC charger must match the batteries voltage (to within a small tollerance (aorund 5v typically) and to apply that voltage to the DC charging port on the OBC. The vehicle monitors the voltage on both sides of the DC contactors in the OBC, and when matched, closes those contactors, effectively now providing a direct, ultra low resistance feed straight iinto the vehicles battery. The Off board DC fast charger now will modulate the voltage it applies to the DC charging port to drive current into the battery at the rate the vehicle requests. Because the charging power is so much higher (up to 250 kW, massively more than the 22kW max from AC (3ph)charging) this current is effectively limited by all sorts of complex factors, from battery SoC, to battery temperature, and component temps within the charging system (including the temperature of the charging handle and cabling, which are water cooled for >125 kW applications) In this case, the DC fast charger is acting as the DC/DC element. This is because a 250kW DC/DC is a large, expensive device, and it would be stupid to include it in the vehicle as opposed to simply installing it at the charging location (in the same way our ICE cars doing have on board refuelling pumps, but rely on fuel being pumped onboard by an external pump) In all cases, the sequencing, fault checking, and functional states are complex, and require a host of system to interact, from EVSE, to OBC to BMS etc!
Great information Thank you. I did not phrase my question in the video properly. I was trying to ask if the onboard charger module or another module on the vehicle interfaces with the Control Pilot and Proximity Detection wires attached to the EVSE. For example, the Chevrolet Bolt EV uses a separate "Powerline Communication Module" to communicate with the EVSE when DC-Fast charging is used. I am wondering if the Tesla uses a similar module or if the onboard charger handles it. Thanks
@@WeberAuto I don't know about the model S but the model 3 has a separate charge port control module. There's some great videos of a chap (Damien Maguire) reverse engineering Tesla (et al) components, specifically things like chargers and inverters. Here's one where he's talking about the model 3 charge port module. kzhead.info/sun/d8iwqrOXh5WCZmw/bejne.html
@@Brendon_M Thank you, I think there also s on the Model S
"or AC charging, being low powered, the current limitation is never really the battery (48 amps of charge current is totally trivial to a battery that can deal with kA of current!) but is the EVSE (Electric vehicle supply equipment, ie the off board charger and supply wiring, the bits normally screwed to the wall of your house). " No completly correct, I have a 22kw wall charger, but yet the M3 (or MY) will only charge at 11kw. Because the ONboard charger is limited to 11kW. "At no time is the EVSE "controlling" the charging current". Now this is not correct at all, I'm sorry. A smart EVSE can controle the charging current. I charge my cars on solar power - the EVSE will charge my cars from 5A to 32A max. (32A on the classic S with dual chargers; 16A on the M3 and the MY.)
@@dirksaenen436 no, the EVSE can COMMAND a charging current (via PWM signalling on the PP & CP lines) but the On Board Charger CONTROLS that current. ie the OBC modulates it's power switches in such a way as it's inductive elements transfer the current commanded by the EVSE, as long as the vehicle is happy to accept that current
I'm not a full time mechanic but I found this video absolutely riveting. Excellent tutor, you made everything so easy to follow; I never got lost once! This tutorial will be a fantastic asset to anyone (car mechanics / car technicians ) involved in the emerging electric car industry. Loved it, very well done sir, thank you.
You deserve to be a professor because you explain in a high-level scientific way
Wow, very detailed! This car started a revolution.
Thank you
Nope ))) it was a T Roadster $))
@@tvguide4khv nope, it was the EV1. That car inspired the Tesla founders. They just had the foresight to go for Lithium Ion batteries and that made all the difference!
Awesome video!
Thank you
I didn't think Zack would be here💙
its just a (bad) car
So there no schematics for Tesla? Once again, PROOF that Musk/Tesla are anti-independent repair. Driven by pure greed! NEVER purchase a product that can't be serviced by an independent repair shop. Whether it's a car or a toaster!
I just thought wow! what an informative video. Then I came down to the comment section, where I see another of my favorite youtuber has commented 'Awesome video'. Totally worth it...
You have many admiring students. You are a supurb, world class instructor. You are the Rush Limbaugh of of Weberauto instructors on KZhead. Congratulations Professor John D. Kelly for teaching the latest EV technology, the USA needs more unsung Hero's like you. God bless you and keep up the class act academic profession.
Thank you very much!
Well done. I converted my classic VW beetle to EV. I enjoyed your deciphering of the Tesla components. I wish I was 60 years younger and could join your class.
Thank you!
For sure it was not a long video Professor. it was perfect full of information, tips and details. Again simply fantastic.
"Let's see what's inside" my favorite part of your videos!
Thanks for watching
Just incredible the level of detail and clear instruction here. I really do love these videos. Thank you so much
You're very welcome!
I am not even half way through the video but had to stop it so that I was sure to remember, and to tell you that this is SO nicely explained. Everything makes sense in some way, so many nice details, and (until now) not anything redundant. Thanks for a great video!
Mr. Weber thank you for such a stellar site. Understanding how something works is the 1st step to repairing it .
No doubt this gentleman a gift to teaching like nobody else.
Thank you!
This is absolute gold. Thank you so much for putting up such awesome videos. I am so grateful to you.
Thank you very much
Great explanation, I found a gold mine today. Thank you, Professor. Your students are lucky to learn from you. 🙏🏾
You really cannot get anyone better with a great voice and accent to get the information across.This makes learning very easy. 👍greeting from England🇬🇧
This video is gold! very well explained and the clear presentation is very much appreciated. Thank you for this excellent content!
You are a great person. Doing a huge amount of work. I am from Ukraine, recently opened a service for electric vehicles. I got most of my knowledge from your videos. Thanks a lot!
That is awesome! Thank you for watching
Great practicle lesson. I watched the whole video and I love it how it is explained practicly. Thank you Sir
Love your videos, it scratches that itch a whole lot of people have wanting to know how these work. Because it just seems like magic.
Great stuff Professor John .........your comprehensive analysis of the Tesla charging components is illuminative for those of us used to ICE vehicles. You're giving us a glimpse into the future of where most cars will be. Who knows how soon? Don't know but it's coming.
Thank you very much
I've been learning a lot of EV from you professor by looking inside of those virtually! Can't get enough of these kinds of educations that explore leading edge technologies.
Thank you
You really have a lot of knowledge about electric vehicle parts. You worked hard to make the video. video quality, pre-video preparation was perfect. thank you so much Mr.John
John, I was fascinated and watched 100% of the video. I loved your thorough and clear explanations on how the Model S high voltage system works. I was very curious and this answered a lot of my questions. Five star rating!!!
Glad you enjoyed it! Thanks for watching
Hello John, you bloody legend you. This man is a teaching machine.
Thank you so much!
My daughter’s studying engineering at one of your conference rival schools (Cal Poly), so right now I’m not exactly in a position to financially support the good work you’re doing at Weber State. But I sure do appreciate the amazing work you’re doing! I like understanding what my Bolt EV is thinking...
Thank you very much! The Bolt EV is a great car
I totally confirm that your explanation is unbelievable and the accuracy is almost 100%
Such a good professor. Thank you so much for your work. It means progress to all the people that work with EVs
You are very welcome
Another excellent video from professor Kelly to start my Saturday morning. Some weeks ago I spent an entire weekend watching your videos at 1.75x just to gain more knowledge at a faster rate. I am hopeful we can someday understand Nikola Tesla’s disconnected power system to reduce the size of battery packs in vehicles and reverse the flow of power from our homes. Distributed power generation should be the way of the future s as we learned here in Texas in February. Thanks again professor.
Thank you very much! I am happy you like the videos.
Great in-depth info. If I were a young man I would be seriously looking into this training. This is the future.
Thank you very much
I'm glad you started asking for donations. Your videos are a great resource and it's nice know we can chip in to keep you supplied with interesting parts. Thanks for another great video!
I appreciate that! Thanks for watching
Getting knowledge about HVDC, HVAC, Inversion DC to AC,Conversion DC to DC,Cabling, Power and Control Circuits,Mechanical & Electrical Interlock Systems,Battery Storage ( Charging), AC I/M, Special components for Distribution Junction Box, Transfomation from HV to DC, Compact of Design of Tesla Model S....etc are very beneficial to me. Thanks a lot for your sincere effort!!!!!
Thank you very much for your insights. And, as like the other videos you've made, this one is priceless and it gives the opportunity to enthusiast learners to go deeper into the EV's technology.
You're very welcome! Thanks for watching
Thank you, I ve learned a lot more insight with this video. I am just a normal Tesla Model 3 owner , at age 71...
Glad it helped, Thank you for watching
Hello Professor, I have only recently found you videos, and I must say they are really great, your teaching method is excellent and it ensures that your points come over in an extremely calm and informative manner. I am a Technical Training Instructor myself here in England, I teach in Heavy Vehicle Industry, even as an experienced trainer I am leaning so much from your EV videos, keep up the excellent work sir, I work by the ethos that every day is a school day and young or old, you never stop learning
THANK YOU for doing this!! These cars are the polar opposite of the cars I work on at my channel. Literally!
Thank you! Even with that I see that you can charge a cell phone in a Ford Model A
@@WeberAuto Ha ha! Yes, indeed. I am fascinated by the Tesla electronic systems. I just started studying the schematics for the stepper motor controllers. I've breadboarded a couple and playing with them using model airplane brushless motors for guinneapigs.
@@ModelA Fun stuff!
It’s interesting how life works. Your videos were instrumental in my decision to purchase a Bolt EV towards the end of 2019, a decision which I’m still happy I made. I’ve been fortunate enough to now be in the position to order a Tesla, which I did last weekend, and now you are doing similar technical videos on Teslas. I work as an automotive tech and I’m quite familiar with hybrid systems since I used to work for the state, and they had a large fleet of Prii and Civic hybrids at the time. I don’t see many EVs come through the shop since they don’t break often and many owners unfortunately don’t think they need any maintenance, but your videos on the Bolt and other EVs since then really developed a strong appreciation for the technology involved, as well as the comparative simplicity compared to an ICE vehicle. Knowing the relatively small amount I do about current Teslas, it’s interesting to see how they have refined their processes with the newer platforms in an effort to cost engineer the vehicles (i.e. reduce components in order to increase their profits) Thank you very much for the videos and your continued efforts, nobody else on KZhead explains things with the amount of factual, technical information that you do.
That Bolt didn’t last, I see..
Thank you very much! I appreciate your feedback
I as well Bolted from my Bolt to a Tesla. You're going to love your Tesla.
The Chevrolet Bolt has basically zero maintenance for the first 150K miles. Wiper blades, rotate tires, refill windshield washer fluid. That's about it!
@@tracymathews4122 Hi Tracy, that is an oversimplification of what is in the owner's manual. There are seven pages of maintenance information for the Bolt EV. Some items are time or mileage-related. For example, brake fluid and coolant in all three coolant loops need to be changed at 5 years regardless of mileage. There is underbody flushing required twice per year. etc. EVs, including Teslas, do have more maintenance than people may think. EV drivers need to read the maintenance section to become familiar with what is required. Thanks for watching.
Fabulous Explanation, some older Model S had option of Dual on board Chargers. So could Take 80A (if I recall).
Thank you, yes, that is correct
In theory, you could retrofit the 2x11kW chargers to a lot of Model S/X.
It did. Later they removed that and added a single charger with 72A option. It surely fills the center slot in that charger case.
I have a Model S with dual chargers, one is called the Master and the other the Slave. I live inland Australia and glad to have 22kW ac charging. Every little counrty town's showground has 32A 3 phase (=22kW) outlets which makes it possible to travel anywhere. 1hr charging gives 120km. Sadly not available on the newer models.
@@moestrei Great information, thank you
Thank you Professor Kelly. I can't stop watching your educational video. NOt only To learn clean english language but also fine automotive technology. You are the best teacher I ever know
Thank you very much. Best wishes
Can't even express my admiration for this video! It is thoroughly informative and well explained. Thank you very much!
Amazing video. Your voice is like an American David Attenborough 😁 very soothing and you also explain everything insanely good
So nice of you
@@WeberAuto Great video! 👍 Maybe not for everyone, because many viewers are looking for a hot trending videos, but for technical guys like me with technology knowledge hunger it is a goldmine.
@@WeberAuto, as far as who decides which voltage is used in the _Charging Module,_ common sense dictates that the module has the final say in it. Because if the changing station is to be defective, it might cause a short or ever fire to the vehicle if the vehicle is not able to recognize the type of current. Plus comments from some people that have purchased a salvaged Tesla before, that a _super changing_ option was active for some time until later when it was disabled. Assuming that when *Salvage* status was flagged in the Tesla database and vehicle with the VIN in question was marked for a removal of that option as soon as the next OTA software update is performed to the vehicle.
Really love your videos, best content on KZhead today!!
Glad you like them!
Nice to hear an explanation without constant fawning
What an amazing, patient view into the amazing high power system. I enjoyed it all.
PROFESSOR KELLY: "WOW! that's impressive!" The whole darn thing is impressive for less than $100 grand!
Thank you for watching
Mechanic shops 🏬 can’t get service information on Teslas unless you’re a Tesla dealer. thanks for your detailed video
Thank you
Do you know if this is also true in Europe? As the are laws here regulating such things and forcing producers producers to provide documentation for repairs (to registered professionals). But I don't know how it works in practice.
@@jankoodziej877 I do not know. Here in the USA you can purchase a service information subscription, but the content is very limited
There are no "Tesla dealers" - just approved repair shops and Tesla service centers. At least their EPC is free for everyone... Too bad still not possible to buy high voltage or computer components from them though.
Great informative videos. Thank you so much.
Great Insights of High Voltage Architechture....you are awesome.. your passion towords explanation is amazing..great work
Prof John you are Provide information honestly and professionally. thank you so much for your effort and wonderfull information
Interesting to see the “Rapid Splitter” that plugs into the battery. Remember, many years ago when the Model S was first developed, the intention of Tesla Motors was to utilize rapid battery swapping stations. That plan was eventually scrapped, but it seems because of the legacy of swap stations, the Model S is still designed for a rapid and automated electrical connection to the battery. Sorry if this topic was already discussed, I haven’t watched the entire video yet. Thanks
Great point! I had forgotten about that. Thank you!
Good point, but I would imagine that newer Model S, post 2015, have a different charger configuration given that Elon quickly gave up on that idea.
@@alexnutcasio936 That may go away with the Model S and X refresh and changeover to a new battery type this year.
Yes! This is exactly the reason for the design, however without pretty expensive tooling to align the battery to the chassis any misalignment on install would cause the damage to either the rapid splitter or the coolant fluid disconnects when installing the battery. Neither were designed to handle the load applied by 1500lbs of battery being shoved at 3000lbs of vehicle. It’s so ironic to me that this design that was supposed to allow easier and quick service may be one of the biggest nightmares when it comes to working on these vehicles. I know there are probably millions of dollars of flooded batteries that were destroyed when the quick disconnect coolant lies broke during a standard pack install in service.
@@1forrest1 Great points, thank you
Would love for professor to do a video on the difference in shielding between the different systems used by auto manufacturers
I wish I was qualified to do that, but it is not my area of expertise. Thanks for watching
@@WeberAuto -.khan=.
John, what a great presentation and it makes it so much easier to understand by showing everything off the vehicle. It's amazing that modern compact electronics can handle with ease the kind of voltages and currents present on an EV.
Thank you very much
Dang this real man knows everything
I very much enjoyed your explanation of the drive train and this video, but when considering wire, if it is a multi strand single conductor it is referred to as wire, if it is a multi conductor then it is called a cable. I'm a retired Union Electrician, and have installed a great deal of this high voltage wire at refineries during my time as an electrician. as a side note whenever you see four power transistors in a row it is most likely to be an H bridge, yeah, I also know some electronics. mike
Good points! Thanks for watching
I’m sure the electronics can do the switching from ac or dc. Great video once again thnx
Thank you
I'd agree. If the incoming charge current has nowhere else to go with the DC contactors open. It would hit the charge controller. Charge controller would determine it's DC having no frequency, then close the contactors and disable any Power FETs on the AC to DC circuit.
No idea if anyone notices this but i have to gove you the biggest of thank yous, im studying to get into a Finnish school of automotive engineering and especially ev-tech and i’ve rambled through hours and hours of content out of sheer interest, this was by far the best video and i can only wish to see more teachers such as yourself in the future, thanks!
Really interesting and excellent description, this is really high tech stuff and also requires amazing manufacturing capability. The professor makes it really easy to understand. I'm happy to find this and his other lectures.
Thanks!
Thank you very much!
I am teacher in biochemistry in France and i am curious ; you are a very good teacher .Génial super 👍🏽✨👍🏽✨👍🏽✨👍🏽thank you so much
When the vehicle is connected to a supercharger station, the Pilot signal indicates the higher current and establishes a single-wire CAN comms with the onboard charger.
Thank you
Or rather DC current, no?
@@rkan2 It is so much simpler to check the pilot signal PWM (therefore the interpreted current capability). If the pilot PWM is 90%, then per the J1772 spec, it indicates "fast charge" station. After that point, Tesla establishes a direct communication line with the station to negotiate how much current the pack can accept etc. When you connect the charging station plug into the chargeport, there is no voltage at the pins (J1772 standard operation) so vehicle doesn't know (can't know) what the voltage level is or if it is AC or DC. The only way the vehicle knows what it is supposed to get is through the pilot signal.
@@tripplefives1402 Yeah, that is a more accurate description. Thanks
Peace… Shalom… Salam... Namaste and Thank You Everybody for All that you are doing to Heal our Mother Earth 🙏🏻 😊 🌈 ✌ 🌷 ☮️❤️
Thank you
Excellent and Detailed Explanation of Tesla HV Cabling !
Great calm thorough presentation, thank you.
Thank you very much professor! I appreciate about this huge work.And I would like to know how tesla synchronizes front and rear wheels together to act as AWD Electric vehicle.
Thank you. Me too
Its very easy. Current=torque. And you can monitor actuall wheel speed via ABS system. A lot of "performance" electric scooters and e-bikes have a 2wd system. Works same, but if in case of electric scooters and e-bikes max torque just programmed inside of each controller(1 BLDC controller for a front and another one for a back) they in 99% sharing a signal from trottle hall sensor accelerator. In case of Tesla(and other 4wd EVs its done by torque reques thru can bus system).
@@pashko90 Thank you!
Great video. Hopefully you can disassemble an EV with a heat pump in the next year as I would like to see how many components are eliminated or altered.
Thank you. I would like that
Thank you for your time! It was very interesting to watch and to listen to your presentation!
Does the A/C compressor (refrigerant) also function as heat pump for cabin heat and/or battery heat?
It is used to chill the battery coolant as needed, but is not used for heat. There is not a heat pump on this model.
The model Y can do this with it's Octo Valve, presumably this engineering feat is coming to the new S/X
@@kingrpriddick during the last shareholder meeting, Tesla stated they moved all models to heat pump
schonzen the newest Model 3 also have heat pump. The newest S and X are getting it as well.
My answer on 14:00 - I guess that charger station says to charger module what kind of power is connected. So car knows how it can be charged, what current, etc. If no info provided by charge station - tesla wouldn't start charging even if it connected to power source and voltage is present in receptacle
Thank you
Love how you are teaching things that are so new. Great to see you reverse engineer this stuff and explain it to us.
Thanks for converting to metric units and for sharing this with the public. Really enjoy your videos. Greetings from Germany.
You are welcome. Thanks for watching
Wonder if you can drive Tesla car with all that cable in half meter water , for example passing a road with overflow river by road , I doubt about it, what you think ??
They are weather sealed cables and connections. They were not designed to be submerged because the components to which they connect all have vents that could let in moisture. Thanks for watching
Most likely better than driving an ICE car with intake under the bonnet through some water.
So it's also explained if AC charge module in EV is broken, DC fast chargers(including chademo) will work anyway.
Thank you
Thanks for your best effort. One can tell that you are really striving to make everyone understand.
sir, your way of speaking during the video is excellent. Very slow and accurate and precise words. Really nice.
Thank you very much
Remember that the DC-DC convertor has to run the power steering. Cars with electric power steering have very powerful alternators.
Great point. Thank you
Great point! Also add air suspension system and all the motors to run coolant through battery and modules. Mr. P
PS: This video was AMAZING and I learned a LOT! Love this channel!
Also the Tesla has an electric brake servo, on older cars that is driven by engine vacuum.
The durability of this had to take years of research. However, the idea for high voltage EVs was around us. Consider the high power cables that power out electric grid, that carry power to homes, and businesses. The cabling is exposed to blistering weather condition. So its no surprise how Elon Musk built and production ALL EV and now spacecrafts. Sometimes ideas are strung together from things we use and take for granite each day. Repurposing them into new useful ideas is innovation! So what’s YOUR next big idea! Remember, consumers are the catalyst for the ideas to be successful in the marketplace.
Thanks for watching
As someone who has worked on some of the things in the video, my hat is off to you. Very well done introductory video.
Thank you, Professor. Excellent job explaining this complex system in a way anyone could understand.
Glad it was helpful!
Did you check for capacitors before you stuck your finger into the 48 amp charge receptable?
Of course. Thank you
Could you do a video on how to diagnose these components or things that can give away what component could be faulty as to how the car is acting??
Good suggestion. Thank you
You are highly ethusiastic like 28yrs men, inspired by your great energy and what a beautiful explanation, just loved it.
Prof. Kelly, your videos and explanations are always excellent technology lessons. Thank you very much for posting.
Glad you like them!
A stack of on-board vehicle charger units are in a supercharger cabinet, all connected in parallel. This was true at least of V1 and V2 supercharger stations. Those superchargers are supplied by 480V three-phase AC from a utility transformer. With this design, Tesla can reuse the same hardware for onboard and stationary charging.
Very interesting. I did not know that, but it makes sense. Thanks for the information!
Yep, 12 of the smaller gen 2 on board chargers (gen 3 charger is shown in this video). Split into 4 banks, 3 chargers each. It’s connected between 2 handles, and always prioritizes the first to plug in. You start with all 4 and can get 120kW, but if someone else plugs in you get lowered to 90, and then later 60 as you reach a higher SOC. New ones are purpose built 1MW inverters that can do split between 4 cars up to 250kW each. Honestly I’m super impressed the team got that much power into that small of a space.
@@1forrest1 Great information, thank you!
Amazing work, very easy to understand. Thanks
Dear Mr Kelly I am so happy I found your channel. You truly are in your Element and I really enjoy your videos. Thank you for sharing your knowledge with me, I mean us, the world lol. You have a mystical way of making it very difficult to turn away from watching your knowledge flow through the ethernet. I wish all of my instructors could have been like you. Again thank you for sharing this information in the very best way its ever been shared. You are amazing and I feel grateful for finding you..
Thank you so much!
This video is absolute brilliance........why can't more videos explain things from start to finish quite like this.......
Very impressive! I could not even imagine the technology going into the Tesla S. Thank you for the detailed explanation.
Thanks for watching
Yes! He is an instructor with quality capabilities.
Dear Professor John Kelly Thank you for the excellent video. I have seen 3 of your high quality tutorials so far and I am impressed beyond words. It is nice to be able to learn so much about the Tesla from someone who clearly knows so much and can make it easily understandable. I will be looking for more of your work and I know I won't be disappointed.
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