Understanding Coolant Flow in a Tesla

Рет қаралды 80,446

Күн бұрын

See the five different modes of coolant flow in Tesla's heat pump system through the Service Mode displayed on the car's screen. Learn about how coolant is utilized in transferring heat energy to and from various powertrain and high-voltage battery components during cabin heating or cooling.
This same process is also applied to powertrain and high-voltage battery heating and cooling. This heat pump technology is integrated into Tesla Models S, 3, X, and Y from 2021 and onward.
Use my Referral code link to purchase a new Tesla ts.la/john304015
TIMELINE:
0:00 Introduction
0:19 The components involved in the coolant loops
1:51 Series Mode - For cabin cooling and powertrain/HV battery cooling
2:17 Series Radiator Bypass Mode - For cabin heating
2:34 Parallel Mode - For cabin heating and powertrain/HV battery cooling
2:48 Ambient Source Mode - For cabin heating and powertrain/HV battery heating
3:14 Off Mode - For cabin heating
3:32 Video summary
ABOUT US
Weber State University (WSU) Davis Campus - Automotive Technology Department - Advanced Vehicles Lab. A technical description and operational demonstration of the five modes of coolant flow in Tesla's heat pump system.
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 KZfaq 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 then 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

Пікірлер: 154

@djosbun 11 ай бұрын

There is NO ONE better at explaining automotive systems (and how to properly diagnose and repair them) than Professor Kelly. Thank you, Professor!

@WeberAuto 11 ай бұрын

Thank you Dave!

@thomasruwart1722 11 ай бұрын

Ditto.

@nooshiofficial 7 ай бұрын

Just came across your channel. Super glad I discovered ya!

@kingofcrunk4237 6 ай бұрын

No videos for a while - I hope your health is good. @@WeberAuto

@briank10101 6 ай бұрын

@@kingofcrunk4237I'm thinking the same.

@jaybird7534 11 ай бұрын

I'm still astounded by Professor Kelly's Tesla Heat Pump bench trainer and excellent tutorial.

@WeberAuto 11 ай бұрын

Thank you!

@randomvideosn0where 11 ай бұрын

This octovalve is a great device when every watt counts! Maybe this type of thinking can be applied to grocery store freezers and data rooms within buildings (currently all heat is dumped outside even in the dead of winter).

@WeberAuto 11 ай бұрын

Agreed! Thanks for watching.

@ArtCooler1 11 ай бұрын

Many grocery store refrigeration rack systems have heat recovery coils inside the building where air from the store interior is blown over them to recover heat from the refrigeration cycle vs. dumping it outdoors through the condensing units.

@randomvideosn0where 11 ай бұрын

@@ArtCooler1 I am curious, where have you seen this installed? My company does a fair amount of grocery store and wholesale warehouse construction, and I have yet to even see provisions for this let alone install.

@ArtCooler1 11 ай бұрын

@@randomvideosn0where I've seen it in older grocery stores.

@ralanham76 11 ай бұрын

I also think and this being used in restaurants and homes

@mikedevine1885 11 ай бұрын

This is the most interesting series of mechanical training I have ever found. John Kelly is a fantastic resource.

@WeberAuto 11 ай бұрын

Thank you very much Mike!

@teslaINDIA. 4 ай бұрын

I saw lots of video on this channel, and now i can say this man a bestest explainer i ever seen , hat's off professor

@alexnutcasio936 6 ай бұрын

Savagegeese gave you guys another big shout out today 11 3 2023 . I’ve been here for years and agree!!!

@MegaHugro 7 ай бұрын

Impressive presentation of Tesla engineering. At 68 y.o. I am chomping at the bit for my Cybertruck delivery date. I have hated my pickups made by the Big 3 and their Unions for years. Go Tesla.

@Hazard4K 9 ай бұрын

I've worked on high-end high-performance cars most of my life and I can't say enough about how amazing you are at your job. Even though I do have a master's -- I've always been bad at learning in a classroom or online. (experience) ... Somehow you have a way of conveying "experience" though a youtube video and I cannot thank you enough. I have always wanted to learn about the Tesla (and other EV systems) inside and out, all of the systems and how they interact -- so I would be able to work on "any EV platform + be comfortable in doing swaps on older ICE cars like my 2000 Boxster S. I've learned so much from your videos that I'm finally back to the point of "I really don't know crap" :) -- which is GOOD! You've managed to educate me more on this stuff in ~5-videos than I've been able to absorb in the past ~5-years.. Thank you. I will surely donate soon to this. I could handle being in your classroom for 10-hours a day 7 days a week!

@D0li0 11 ай бұрын

That's freaking awesome. Excellent job describing how it works.

@WeberAuto 11 ай бұрын

Thank you very much!

@joe2mercs 4 ай бұрын

This video is outstanding!

@rb-qc1fn 11 ай бұрын

Now that deserves a long; slow clap. Exceptional, as always! Kudos, and thank you, sincerely.

@bi5048 11 ай бұрын

Nothing but only immense knowledge from this channel. Thank you professor from Jakarta.

@WeberAuto 11 ай бұрын

Thank you very much

@MayGreenWho Ай бұрын

helps a lot, good video. the octovalve is excellent! so your presentation is!!

@thomasruwart1722 11 ай бұрын

I just found your YT Channel and it is outstanding! I really appreciate all the effort you put into these videos. As a retired [computer] engineer, I really enjoy learning how SHIT (Software, Hardware & Integration Technologies) works, especially when it comes to learning about the inner workings of my Tesla Model Y. Thanks!

@WeberAuto 11 ай бұрын

Thank you

@djaliuma 6 күн бұрын

Thanks for that!

@dirtyhank 11 ай бұрын

Very informative, as always. Keep up the good work!

@WeberAuto 11 ай бұрын

Thank you very much D H!

@tedmills1962 11 ай бұрын

Another excellent video! Thank you.

@WeberAuto 11 ай бұрын

Glad you enjoyed it!

@voytek34ify 5 ай бұрын

Thank you

@Neil-ru7kw 4 ай бұрын

Professor , I wish you a great year with good health , good times and peace . Take care , Neil (a 74 y.o. old car nut) 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

@tesfahungetahunargachew4328 6 ай бұрын

Tnx a lot sir for all your effort to help us

@stephenw4720 11 ай бұрын

Awesome breakdown. Professor Kelly! Love from Cali.

@WeberAuto 11 ай бұрын

Thank you!

@ralanham76 11 ай бұрын

Thanks for overview

@WeberAuto 11 ай бұрын

Thanks

@nkrish9232 11 ай бұрын

mind-blowing

@gp2003gt 11 ай бұрын

Always interesting videos, thank you.

@WeberAuto 11 ай бұрын

Thank you very much!

@UrbanOpsOffRoad 11 ай бұрын

Greetings professor Kelly! The class was awesome!

@WeberAuto 11 ай бұрын

Thank you!

@rjherche 11 ай бұрын

Thanks!

@WeberAuto 11 ай бұрын

Thank you very much!

@zakir.89 10 ай бұрын

Very useful information. Continue in the same spirit. I would really like to see the analysis of the Toyota bZ4X. Thank you!!!

@mohammadhassankhan6707 11 ай бұрын

Thank you for the great video

@WeberAuto 11 ай бұрын

Thank you very much

@LawpickingLocksmith 11 ай бұрын

Thanks John, great info.

@WeberAuto 11 ай бұрын

Thank you

@piconano 11 ай бұрын

Learned a thing or two. Thanks.

@WeberAuto 11 ай бұрын

Thank you!

@TeomaveBahia 11 ай бұрын

Excellent Vídeo! Congratulations teacher!👏

@WeberAuto 11 ай бұрын

Thank you Teomave

@notnecessaryok8066 8 ай бұрын

You are the best teacher in world Mr professor can you please make video on ECUs how they commucate with other ecu using CAN bus ,how they collct data from sensor how actuator works I am eager to see this video Thank you in advance

@Pablo_Automotive 11 ай бұрын

Thankas for another Great explanation

@WeberAuto 11 ай бұрын

Thank you!

@markferraro5250 3 ай бұрын

Thanks JOHN this stuff is amazing. How are you doing?

@Bia2fix 9 ай бұрын

great

@dirkvanvuuren6227 11 ай бұрын

Awesome presentation.

@WeberAuto 11 ай бұрын

Thank you Dirk

@danielnegash7985 11 ай бұрын

Professor you are different thanks lot for your explanation

@WeberAuto 11 ай бұрын

Thanks for watching

@mcpeirotv7367 6 ай бұрын

It’s very interested

@scottklaw 11 ай бұрын

Awesome Info.

@WeberAuto 11 ай бұрын

Thank you

@brddukaty7460 11 ай бұрын

Great video

@WeberAuto 11 ай бұрын

Thank you

@skybot808 11 ай бұрын

Love all the work your channel does. Enjoying these shorter videos!

@WeberAuto 11 ай бұрын

Thank you

@mohammedsuboh1420 11 ай бұрын

Thank you very very much ❤

@WeberAuto 11 ай бұрын

Thank you Mohammed

@7710747 10 ай бұрын

Thank you for your KZfaq channel, I thoroughly enjoy your content and manner of presentation. One question if I may: What label maker are you using to create your yellow and black labels?

@user-zs6pz8kd8h 6 ай бұрын

take care professor

@rud 11 ай бұрын

My air to air heat pump at home, needs to defrost in the winter time. I wonder if the car ever need to defrost. Would be kind of hard while driving to get the radiator above freezing to melt the ice.

@WeberAuto 11 ай бұрын

Yes, it does at times. I believe the system can run warm coolant through the radiator to thaw it as needed. Thank you for watching.

@rud 11 ай бұрын

@@WeberAuto thanks for replying! :D

@TheKdcool 8 ай бұрын

I have a hard time understanding the difference between 2:18 series radiator bypass and 3:15 off mode. It looks very similar

@carlosfranchi5043 11 ай бұрын

Always top

@WeberAuto 11 ай бұрын

Thank you Carlos!

@carlosfranchi5043 11 ай бұрын

@@WeberAuto I'm thankful for every class sir

@DownshiftDre 11 ай бұрын

Best video! I drive in service mode sometimes to watch this all in action. How were you able to force to get into the different modes. Can you provide the logic on how each mode is entered?

@WeberAuto 11 ай бұрын

Thank you. It requires the paid Toolbox 3 subscription from Tesla to enter Service Mode Plus; I should have specified that I was in Service Mode Plus. Use a Tesla Toolbox 3 Action called "Thermal Coolant Flow Cycle" to cycle the Octovalve through its four modes as shown in the video. The procedure takes 20 minutes (five minutes in each position).

@GripFreak 11 ай бұрын

Excellent explanation! My goal is to one day attend your 5 day bootcamp. I have been building automatic and standard transmissions for 28 years and I have focused my attention and future on hybrid vehicles (Toyota). The transmission in a hybrid is far more than a conventional, computer controlled transmission. I would like to know what textbook you use or recommended for detailed study on theory and operation of hybrids? Thanks for sharing your vast knowledge and experience! See you soon professor Kelly. 😊

@WeberAuto 11 ай бұрын

Thank you. I don’t have any book recommendations. Everything I have seen is already out of date.

@wirelessnet2747 11 ай бұрын

So is series radiator bypass also used to cool the cabin and heat the PT/Battery simultaneously? Just open the valve to the LCC instead of the chiller?

@32bits-of-a-bus59 11 ай бұрын

Thank you for this very informative video. What I found noteworthy about this design is the fact that the autopilot computer is in the same loop with the battery. If I understand it correctly, it means that the computer will be warmed up upon preheating the battery to about 50°C before charging. This is weird but I can imagine that even then then cooling power for the CPU will be high enough to cool it adequately (CPUs in notebooks often run at 100°C with no problem at all). So, the only downside might be large and fast temperature swings. These might cause mechanical stresses on solder joints due to different thermal expansion of the chip carrier and the PCB board during the temperature transition. Let's hope its impact on life expectancy of the computer will be far beyond the lifetime of the vehicle.

@WeberAuto 11 ай бұрын

Thank you. Agreed, the temperature difference is more than enough to keep the autopilot computer cool. The autopilot computer has been liquid cooled on Teslas for many years. I do not know what the failure rate has been, but I have not heard of any failing.

@golgothapro 10 ай бұрын

Hey professor ! I just got a wild idea ! If you could pull the three-phase leads for both MG 1 & MG 2 off the inverter in a 2nd or 3rd gen Prius, connect them together in the right order, and get the engine to run, (perhaps with an external 12v starter on the crank bolt)... would it drive the car without the hybrid battery connected to the MGs ?

@surendrapatel2573 3 ай бұрын

My tesla model x2019 P100D makes gurgling sound like boiling water. Could there be air bubbles in the coolant fluid. I hear this in the cabin. Thanks for your information.

@kingzrecap1835 10 ай бұрын

Good day sir your video are really educative sir thanks for your time for sharing this knowledge sir, pls sir i want ask a question about tesla gear system pls sir how can i contact you.

@kurdmap77 9 ай бұрын

Hey professor What is low voltage ev parts .

@max_power8510 7 ай бұрын

I donated to Weber Auto today. If I want to learn about the inner workings of TESLAs, it is either Monroe Live or WeberAuto. I went to UTI, but would have loved to have gone to school with professor Kelly if I could do it all over again. Keep up the good work.

@petef.4361 4 ай бұрын

Now if this guy could just get his hands on a Cybertruck!!!

@engeclassautoscop1819 Ай бұрын

your course are online? i´m in Portugal, is possible to make one course please,

@MrEMILIO1959 6 ай бұрын

buenas tardes Profesor, que tal esta, mi pregunta. cuando vuelve a subir mas videos, Un Saludo.

@webreakforsquirrel4201 3 ай бұрын

I dont understand. If there is ambient heat outdoors what would the need for heating the cabin be? Its hot outside why would you want the heater on?

@aljones8519 11 ай бұрын

Super great Vid, but the word coolant is now old school since the '''coolant'' can now both heat & cool right? How about glycol...

@WeberAuto 11 ай бұрын

Thanks for watching. Coolant is the name Tesla service information uses.

@iztokpavlic8785 Ай бұрын

Nice presentation. But particucily in this case, what needs to be cooled? There is no any component with high temperature. My Tesla is cooling something in parking mode hours after I come home. I realy start to wonder what needs to be cooled down?🤔🤔🤔🤔

@WeberAuto Ай бұрын

The high-voltage battery and all other high-voltage components get hot while operating. The battery gets hot while charging too.

@micheleunico 4 ай бұрын

hello or an error u 0110 on a Toyota Auris (loss of communication with the control motor control unit a) I'm literally going crazy either replace the inverter or replace the control unit checked the system on the gearbox up to the inverter, checked the one from the compressor to the control unit everything is ok the system and perfect can anyone help me please

@53ricci 11 ай бұрын

I wonder how often those octovalves go bad and how hard they are to replace. Interesting video 👍🏼

@WeberAuto 11 ай бұрын

Good question. Time will tell. Thanks for watching

@ClockworksOfGL 11 ай бұрын

Probably not too often. IIRC, there’s an actuator motor and that’s about it. I’d be more concerned about the myriad of seals and o-rings that go into the Tesla thermal management system, especially within the manifold. That being said, Tesla does a pretty good job keeping the hose count down. Every one of those connections is a potential point of leaks.

@wrzl1675 3 ай бұрын

I like the “fire mode” which seems to work well.

@MrFoxRobert 11 ай бұрын

👋👍

@WeberAuto 11 ай бұрын

Thank you Robert

@carlosfranchi5043 3 ай бұрын

We're miss you mr Kelly when you gonna back? Don't forget us

@WeberAuto 3 ай бұрын

Thank you. Soon

@carlosfranchi5043 3 ай бұрын

@@WeberAuto thank you sir

@nowsc 11 ай бұрын

… to my way of looking at this diagram, when the loops are “in parallel with each other“, I don’t see the parallelism. I see two separate loops, running at the same time. To me things that are concurrent are almost never parallel. How am I thinking about this wrongly?

@WeberAuto 11 ай бұрын

Thanks for the feedback. It is how Tesla describes this system operation. Thanks for watching.

@stillIdontknow 8 ай бұрын

Hi, I have Tesla's whole car here. Do you need it?

@kurdmap77 9 ай бұрын

And how can i become a ev technician

@djruido1 3 ай бұрын

I honesty hope everything is ok, I’ve come periodically but no video update. 😞

@danielnegash7985 11 ай бұрын

I just want to train the ev technology practice how can to join?pls

@WeberAuto 11 ай бұрын

See continue.weber.edu/professional/programs/evtraining/

@tianic 11 ай бұрын

Sir, with all the respect, but you look like kinpin from spiderman, bad ass look, but in a good way

@WeberAuto 11 ай бұрын

LOL, thank you!

@zahlex 11 ай бұрын

I don't get where in the diagram the heat transfer between coolant and cabin air is. Can anyone help? Is it the radiator? But isn't there a radiator in the bumper?

@edc1569 11 ай бұрын

me neither

@joeclaveau519 11 ай бұрын

This is the coolant side, it interfaces with the refrigerant loop at the Liquid Cooled Condenser (LCC) in the upper left and the Chiller in the upper right. One for receiving and one for rejecting heat, respectively.

@WeberAuto 11 ай бұрын

The heat transfer from the coolant to the refrigerant happens in the Chiller. The refrigerant side of the supermanifold is not shown in this video, but you can see it and how the cabin is heated here kzfaq.info/get/bejne/etuapZZ1t9HUdIk.html

@zahlex 11 ай бұрын

@@WeberAuto Oh, the heat exchange with the cabin is in the refrigerant loop. Thanks, and thank you for the link. But after watching the whole hour, I still don't understand why. Wouldn't you want to keep the refrigerant loop as small and simple as possible?

@WeberAuto 11 ай бұрын

@@zahlex This is the simple version. You should see the heat pump system in some other cars.

@jaybird7534 11 ай бұрын

When the student is ready Professor Kelly will appear 🧐

@WeberAuto 11 ай бұрын

Thank you Jay

@richardshultz6834 11 ай бұрын

There are two diffrent coolants in a car. The water and antifreeze. And refrigerant for the heat pump. (A/C, r134a) You did not explain how these two worked together. I am pretty sure that the refrigerant dose not go through the battrie.

@WeberAuto 11 ай бұрын

Thanks for your feedback. Tesla does not refer to refrigerant as coolant. This video is about the coolant (antifreeze) side of Tesla's heat pump. See my Heat Pump video for an expanded demonstration and description. kzfaq.info/get/bejne/etuapZZ1t9HUdIk.html

@Alex-rv8gw Ай бұрын

@surenbono6063 10 ай бұрын

..space age tech..mybe adopted from the international space station..you could tweak it on the software.. hopefully the A.I was not responsible for it to catch fire... terminator paranoia ..

@santaclause2875 11 ай бұрын

Thanks, Prof. Kelly! Another excellent presentation. Seems EV's are much more complicated than we have been led to believe. Imagine a 10, 15, 20 year-old Tesla with multiple owners over the years, and a poorly maintained cooling system as this. Corrosion, damaged heat exchangers, pumps, controls, coolant passages plugged up.... OH BOY, what a NIGHTMARE!!!!!!

@WeberAuto 11 ай бұрын

Thank you!

@uosiumen 11 ай бұрын

It might be not so bad. ICE coolant has many temperature cycles in range of 0-100*C, while BEV coolant works much cooler, I guess up to 50*C. Add no blow-by's from exhaust or motor oil.

@spazzman90 11 ай бұрын

Probably depends on the EV. But all of these types of cars put much less temperature stress on these components and fluids. Like almost none compared to a regular ICE vehicle. My wife and I both own Bolt EVs. 5 years and 60000 miles separate them, yet the coolant and brake fluid look identical between them. Manual doesn't even call for servicing until 150k miles.

@bluelightguy1 11 ай бұрын

Lol these cars wont see 20 years, engineered to fail

@WeberAuto 11 ай бұрын

@@spazzman90 The Bolt EV coolant needs to be changed every five years or 150k miles, whichever occurs first.

@allaboutjoey_ 10 ай бұрын

me watching this from india where tesla havent even been launched

@Sam_Haddad 11 ай бұрын

sad thing in EV vehicles that Tesla was the leader to EV cars in the whole world , we can see the clone everything from tesla .. Starting from the inside touch screen , the batteries , the AutoOpen charging port ,autopilot , and the Tesla door handle which now Mercedes and Range rover and other brand cars use , Sad thing is the china market has cloned all these systems copy\paste and they now got over 60% of EV market which kills the creation in this world ..