Understanding the Bolt EV
We are finally moved into our new building after a very long summer/fall without access to my cars, parts, cameras, etc. This is a custom video I made for the Doutor-IE event in Brazil on December 4, 5, and 6 2020. The Doutor-IE Circuit is the largest event of technical content for professional automotive repairers in Brazil. Yes, I know my glasses are crooked in the introduction ;)
CORRECTION: The Bolt EV does use a radiator in the Power Electronics cooling loop, but not in the High Voltage battery cooling loop. See my Bolt EV cooling system video at • Chevrolet Bolt EV Cool...
TIMELINE:
0:00 Start
0:10 Introduction
1:53 MUST SEE: Electric Motor, Gears, and Operation
7:42 See the Drive Unit under the car
10:18 See the Drive Unit outside the car
15:28 Underhood components
17:07 The Junction Block
17:50 The Inverter
20:00 The DC-DC Converter
21:30 The On-Board Charging Module
23:50 The Cabin Coolant Heater
25:15 See Inside the Junction Block
27:33 DC Fast Charge Connections
30:26 The High Voltage Battery, Connections, and Heater
35:43 The Three Different Coolant Loops and Reservoirs
38:28 Video Summary and EV Common Components
ABOUT US
Weber State University (WSU) - Davis Campus - Department of Automotive Technology - Ardell Brown Technology Wing - Transmission Lab. A basic demonstration of the Bolt EV powertrain and Power Electronics. 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...
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
It's so rare to see a mind that's able to hold all this information AND communicate it so well. Amazing teachers are gifts. Beautifully done!
Thank you very much!
@@WeberAuto I bet the Professor can walk and chew gum at the same time.
even the professor's english is very easy understandable for someone like me... thank you for this, too
@@jimmiemarkum6718is this supposed to be an abelist joke? Or is it just a poor attempt at sardonic wit implying that he's not a good teacher? I can't tell but either way its not great.
The Bolt EV is a lot more complexed than one would think. You naturally think of a motor and a final drive. But when you stop and think you realize it needs a inverter, control module, a charger system, and a heater for the cabin. You did an excellent job explaining the need for all five boxes and why and how each one works. I've been a mechanic most of my life. (I'm now retired and almost 70 years old) I know all the moving parts in an internal combustion engine, and a manual or an auto transmission. I still like the thought of an EV because there is only one moving part in the motor. (the armature) and the final drive is a lot less complexed than any transmission, manual, auto, or CVT. I like this thought so much that my next car will be a Chevrolet Bolt EUV. I considered the Nissan Leaf, but it doesn't have enough range. I do not the looks of a Tesla Model 3 and I think it's dash is stupid looking. I know there are other EV's and more coming, but the Bolt EV does what I need and has an affordable price tag. Thanks for sharing your knowledge of the Chevrolet Bolt EV.
I’m glad it was helpful. Thanks for watching
That's gearhead DNA ! Tesla's are innovative and have some great engineering behind them, but for me the price is out of the question. Also I worry about long-term maintenance with Tesla. A used bolt is my choice for my next EV. I've had a 2015 Fiat 500e and BMW i3 for 4 years. The Fiat has been trouble free, the BMW less so (suprise!)
It's not an armature! An armature has a commutator and brushes. Brushless motors only have rotors!
@@pootispiker2866 I stand corrected.
I bought my first 2020 Chevy Bolt EV Premiere shortly after I saw this video. This video and the Chevy website inspired me to buy one and I am so glad I did ! I'll never go back to a traditional gasoline car.
That’s awesome, thanks for watching
The fact that he takes these apart in minute detail, and the Bolt is the car he bought for himself, tells you everything.
Thank you
You have a point. If Prof. Kelly is confident enough in the build quality of this car that he bought one himself, I can't think of a better endorsement.
@@laura-ann.0726 You nailed it.
Yeah, that might have just sold me on the thing. If only they could charge just a little faster
But what about the fires
It's incredible how the computers and the high power electronics perform the power flow to and from the drive motor, and the main battery thousands, if not millions of times per second to provide torque and also the regeneration back to the battery as minute and split second changes in the "accelerator" are made to take advantage of the near instant torque and regenerative breaking. Absolutely incredible ! And to get 250-300 miles of range is amazing !! Amazingly quiet and smooth ! And no nasty exhaust !
Love my Bolt. Will never go back to tailpipes.
I just bought a 2017 Bolt with the battery replacement done in 2022. I prefer working on my own cars and knowing how they work, so this was wonderful. Thank you.
OK ... this man is perhaps the best instructor I've ever listened to.
Thank you very much
As always, John Kelly has shown he is one of THE greatest instructors a person can have. Thank you kind Sir; we love you. Keep up the incredible video's. You are truly a "cut above".
Thank you very much
Absolutely the best. I'm anxious to get my Bolt.
Scotty Kilmer or Chris Fix would beg to differ & their subscriber count over a million suggests such.
I'm impressed! No computer graphic, but a real world demonstration where he builds the entire assembly in front of us and the whole things spins as it should. Nice.
Thank you very much
Excellent video, Professor. I plan on getting a 2023 Bolt and I'm trying to learn as much as I can about the Bolt. A couple of weeks ago I didn't know much of anything about electric cars. When I finally do get the Bolt I'll definitely watch this video again. 🚙 🇺🇸
Hi, I have been driving a 2019 Prius Prime for the last 3-1/2 years. If you do get a Bolt, or any other EV, you will likely learn some rather different driving techniques. One of the most important: to get the best performance out of the Regenerative braking system, you will learn to begin decelerating much sooner as you approach a stop sign or red light. You want to drive the car in a way that uses the friction brakes as little as possible, and to capture as much energy as you can from regen braking, that means having a very light foot on the brake pedal. Once you get used to it, you'll never want to drive a gas car again.
Professor Weber, based largely on information from your videos, I searched for and bought a used 2017 Bolt EV with some minor body damage that had the propulsion battery recall work done. Since it has been repaired it has become my primary vehicle and I can safely say it is probably the overal best automobile I've owned, and the first domestically made vehicle I've purchased since the Chevy I had in high school. I convinced my wife ten years ago that we should have solar panels and battery storage on our home and at the time I someday hoped to have an electric vehicle to take advantage of the installatiion but had no idea when and how that would happen, The Bolt made it possible on our budget. I don't think I could ever go back to an ICE vehicle. I sure don't miss oil stains on the floor or the smell of exhaust in the garage. 🙂 As far as I am concerned you are performing a public service. Thanks so much!
I bought a 2023 Bolt EUV. Very nice car I must say. I am on the reservation list, and a minor investor, for the Atera solar powered car. My 2004 Saturn Vue just gave up the ghost so I could not keep waiting for the Aptera to make it to production. I will still get the Aptera when they finally get to production. This gentleman is the BEST teacher/communicator I have seen. I am excited to pass this video along to family and friends. Cheers Dan. Check out the Aptera story!
No car gives up the ghost, it's called maintenance & or repair. This country is helpless!
I'm old (60) and keeping me listening to an educational video for 40 minutes without me falling asleep is already a great achievement! Hats off to you, Mr Kelly, it was easy to follow, interesting and goes straight to the point. You and the team behind who create and edit the content of this video deserve our greatest appreciation.
Thank you very much
I am old too (72) and just say I agree with Mr. Cailloux,there is much more in these power systems than my battery powered tools.I see a lot of Tesla cars here in Vancouver but the Bolt seems to not appeal to drivers here.G.M. seems happier to sell pickups,Thanks for the great instruction ,if I was a bit younger I would look at a career change.
I'm 72 and I watched the whole video. I'm going from a 2005 Prius with 205k to the new Bolt SUV.
@@amazoidal It looks like a nice vehicle
Dr. John - I figure that if you have analyzed every hybrid and EV out there, and chose the Bolt for yourself, it's a great car. And at the price, it's a great value. I may just wait for the tax credits to be renewed. I'm bothered by the control that Tesla has over buying parts, using only authorized body shops which take months for repairs, and some quality issues as this month's Consumer Reports mentions. I watch Rich Benoit (Rich Rebuilds) on You Tube and after establishing an independent garage for Tesla repairs, he is now soured on the brand. There is a video on You Tube on how to charge the Bolt on the Tesla Network for free.
Welcome back professor, glad to see you on KZhead again. Now I am going to enjoy the video and learn something. Woohoo!
Thank you
Woohoo, the prof's back!
Thank you
VGAw is act Gf w t have r Snap as B V🥊🏏🪃🥍⚽️🏹 to abwBWvy
@@WeberAuto b
That smooth "slide-in" was super cool. ;)
I really appreciate this video series. I googled "what's inside a Bolt EV" and found a few reviews of the interior of the car, but THIS is what I was actually looking for. I now know everything I need to know as a prospective owner of one of these vehicles, and the information was clear, digestible, and presented very well here by Professor Kelly. It's so well-presented that I went from knowing absolutely nothing about the car, to being able to accurately determine things like whether or not the used Bolt EVs I see online have DC fast charging installed just from a glance at a pic of the engine compartment, just from the information I learned here. At around $22k-$24k with a guaranteed $4k used EV tax credit, and if I can find one with a recalled battery so I can get a new one for free with a brand new warranty, the Bolt EV is looking like the best used EV option currently on the market. New Bolts get dealer markups to well over $30k. I can skip those depreciation costs and get a full brand new battery with warranty in a car that I paid used prices for, and I actually know what I'm looking at because now I have an understanding of the tech. Totally changed my buying experience, thanks again.
I just did what you described a couple of weeks ago. 2017 w/33k miles, brand new battery installed this calendar year with new 8yr/100k mi battery warranty; plus 2 years left on the EV system warranty. Great deal, $15.3k before taxes.
Welcome back Professor Kelly! The intelligent, logical, concise, clear and humble creator of the finest content on youtube!
Thank you very much
Although a lot of instruction went over my head, l now have a good understanding how the EV works. I found professor Kelly’s instructions brilliant
This guy is FANTASTIC! Great video explaining why the Bolt is the finest GM vehicle they’ve produced in at least 50 years.
This is the first video I've seen on the channel. I watched out of an interest in knowing more about electric vehicles. It is largely what I expected-battery, charging circuit, inverter and motor. I did not expect the electronics to be liquid cooled, but in retrospect I shouldn't have been surprised. I appreciate the simplicity and elegance of the drive unit. It's glorious. Excellent video. I learned a lot.
Glad it was helpful!
I live in Poland.Greetings from Poland.I am glad to see you and listen to you again.
Thank you
Never ever would have thought transmissions would be so fascinating and WELL explained.
Thank you
@ 22:42 I think you meant to say "...High Voltage Out" (350 to 400 vdc) for the connector on the right. Thank You for all your great videos, on EVs, hybrids, and transmissions. As a retired E/E engineer and technician, who loves working on cars, your channel is Excellent!
That is correct, Thank you
Such a knowledgable presenter! He should make aftermarket bolt parts to improve the heater efficiency and DC fast charging speed!
First time I have seen a video from this channel. This guy is a great communicator. I am neither an engineer nor a mechanic, yet I felt confident in understanding the material. Keep up the great work!
Thanks and welcome
Hi there, Professor! We from Doutor-IE really appreciated your participation in our event. Your custom class added very important knowledge to the Brazilian technicians. We hope to see you next time. Best regards!
Thank you very much
bom dia!... tudo bem? eu tenho saudades por Brasil....ate' logo
What an amazing and perfect overview. I have been introduced to most of the major systems in the Bolt EV. In less than an hour, I have an idea what is going on, and what I might need to focus on next. If this isn't the best PR for Weber, I don't know what is. This technology is what folks need to learn now; it is almost a guaranteed career path.
Thank you very much
This technology is what your grandkids need to learn-you and I will be dead and long gone before a total EV take over happens. Try like a 100 years from now. Ice's aren't going anywhere. Do you think the military can operate their vehicles on that EV crap, You'll never see an EV tank, you will never see an EV warship, you will never see a EV Apache helicopter. If you people think ice is going away anytime soon you've got it really twisted. Donald Trump is going to make sure of that in 2024,, let the Keystone pipeline drilling resume & it Will Happen! Bye bye sleepy EV joe.
You are amazing. I love my bolt and it's great to understand how everything works. Thank you
Thank you
Yes! Another lesson! Given all these months without any new video, I was starting to worry. Thank you Professor
More to come! Thank you
Hello professor !! I'm glad to see you on KZhead again !! )
Thank you
A highly underrated EV that's explained and owned by a man that knows what he's talking about. If only I can get my petrolhead friends to watch this video but they never will. Thanks professor from little old Ireland.
Thank you very much
Thank you John! I’ve enjoyed many of your videos. You buying the vehicle is definitely a stamp of approval!
As a High School auto instructor in Canada these videos are amazing. Would love to see one on the full function of the braking system. A totally different system than conventional.
Boys and Girls this is how a real teacher teaches. He is not like most of the rest of the educational system. He teaches and does it expertly.
Thank you very much
Bought a 2022 Bolt EUV last month and this video is nothing short of incredible. Thank you!
Gear-heads rejoice. The automotive EV revolution (though on a bit different reach) brings more intrigue and never ending fascination to us, the eternal Gear-heads. Thank you Professor Kelly, your explanations are awesome. After you learn, you transfer the knowledge of what you find, and we learn. Your enthusiasm for knowledge is contiguous; thank you Professor...j
Thank you very much
I was just back here checking the channel a few days ago, because I noticed I hadn't seen a video from you in quite a while. Great to see a new video professor!
Hey, thanks!
@John Bailey, I have noticed that KZhead has been unsubscribing me from channels I haven't visited recently. Sometimes they leave me subscribed but un-checks the bell icon so I don't see notifications. Just a tip.
@ Jonny and Billy , I've noticed the same thing . Sneaky bastards
I’ve always liked the Chevy Volt, I love how simply they managed to make the whole drive unit. Very well explained as well.
Glad you liked it!
This is the best 40mins of KZhead. Thank you for teaching us for free.
I actually have seen videos on youtube where they said: "You only need to replace wiper blades, tires and charge the batt. and you are good to go".
"Brief introduction" Man I thought I understood this stuff before..... Thank you so much! This has been beneficial and also partially eye opening. I'm about to trade in my Leaf for a Bolt and I'm REALLY glad I watched this. It's solidified my decision more than anyone elses opinions on Facebook. Thank you!
Thanks for watching
I've been a bolt owner since early 2018 and I find this video and the rest in the series extremely informative, thank you weber state u and prof. kelly and team for putting this together.
You are welcome. Thanks for watching
Great to see you back! I missed your videos and was truly worried about you. Glad to see you're ok.
Thank you!
We need someone like this to build simple, inexpensive electric kit cars for the masses.
That sounds like fun
@@WeberAuto Please do it. That's what we need.
People don't want kit cars because they are not safe.
An axel through the motor is such a nice detail I've never thought of
It is a good idea
@@WeberAuto The one down side is that it mandates it have shorter axles. This limits suspension travel due to more extreme angles. On the plus side it makes things more compact.
Excellent explanation Prof. Weber. Myself being mechanically inclined I can appreciate you taking the time to share your knowledge. Thank you. -Glen
Many thanks!
awesome overview! What a cool setup, I truly do love the simplicity of EV powertrains. It's like all of the most reliable durable stuff out of a standard transmission that just never goes bad, gears and big bearings.
Glad you liked it! Thank you
@@WeberAuto what about steering, suspension components? Will it last for such heavier car?
Thank you so much for posting this highly informative and easy to follow under hood intro! I am a new Bolt owner and feel so much more confident in my vehicle.
Gear and axle mobility have been around for hundreds of years.....this technology is so simple, makes me think this could have been incorporated into our vehicles 80 years ago, were it not for Big Oil...This guy knows his poop(I'm a retired Transmission builder). Great video---thank you!
Thanks Professor Kelly - as usual, you do an awesome job explaining vehicles! I have a 2017 Bolt EV that I bought new and it has surpassed my expectations! It is fun to drive, practical, fast and powerful, and I love how GM has tuned the one pedal driving with regeneration. Keep up the great work and service!
_"Simplicity is the hallmark of genius..."_
Thanks for watching
I bought a 2020 lease return with a brand new battery and only 15k miles. I am very happy with it and excited to learn how awesome and brilliantly designed the transaxle is. Good to know you are so impressed with it that you bought one. That is high praise.
Excellent information, much thanks! We purchased a 2023 in dec, love it so far. For people interested, dealer dropped $1,000 of mrsp, ofcourse get the $7,500 federal tax credit and a $1,000 for the home installation of a 240v level 2 charger at home, makes it one of the more affordable cars that can be purchased. Unexpectedly fun to drive with the available torque, if you have a pretty long daily commute this is a perfect little car to do that. Not getting the range that is projected, but only been driving in pretty cold weather so far. 3.5 to 4.0 kW per mile. With local kWH at ~$0.10, 35 to 40 miles per dollar is not bad at all. With local gas at ~$2.80 = 98 to 110 mpg. There are some nuances, there is some loss when charging the car, so there will be some loss there too depending how you charge, from what i understand ~5 to 10% Considering less moving parts and heat generated by the bolt vs ice car, i hope this car will run a long time, even if the battery degrades to 80% after 10y it still should be good enough from a battery perspective to commute a few times a week on a single charge.
Made a donation to the WSU Automotive Scholarship fund as a 'thank you'. Thanks for posting the link.
Thank you very much!
It's so nice to hear from you again professor! Thank you for sharing more of your great wisdom! Cheers from Slovenia!
My pleasure! Thank you
As a GM car salesman part time and working for GM on the Chevy Bolt these vehicles can take a huge beating (not talking about the retail version). All of my customers are very happy with the Bolt.
Good to hear!
Curious, if not retail then what other version is there? Also, what do you mean beating, is that just high mileage or do they actually stand up to abuse?
@@Icayn They are test cars used in a major city with messed up roads.
When I worked for the IBM corporation a while back, we called a presentation such as this a "Broad brush overview". I thought it an excellent presentation - well done, sir!
Thank you very much
Great video! Takes (most of) the mystery out of the EV system.
Thank you
Stumbled on your video on accident. I REALLY enjoyed it! Thanks for making it!
Thank you
I just traded in a 2012 Nissan LEAF for a 2023 Bolt EUV. I earned a degree in Electrical and Computer Engineering 39 years ago. Even though I'm starting with more know-how than most EV owners, I'm finding Prof. Kelly's videos VERY informative. Thank you!
Pretty crazy how much more simple this is than an engine/transmission
I was just looking at your channel earlier today seeing if you had released anything lately. I was 3 hours too early. My ‘17 Bolt continues to be flawless.
Thanks for sharing!
Pleasantly surprised to see your channel again, you do a very nice and organized presentation, very easy to follow. Thanks for your dedication to educating others and hope to see more videos.
Thank you very much!
I watched the original series as you pulled the 2017 Bolt apart including the battery. It was great and well worth it for anyone first seeing this who are interested in how this car works. This is a great overview for people who may not want to spend the time to go through the entire process.
Thank you very much
I have this car for a year. Very satisfied. Saved me lots of money. But I had no idea what is what in it. Thank you so much, this was a good introduction.
Very welcome!
Excellent overview professor! Glad to see you back! I own two 2017s and find these videos educational to say the least.
Glad you like them! Thank you
Relieved to see that you are back!
Thank you, it is good to be back
You are a fantastic teacher. I love watching and listening to you explain how things operate. You make it very easy to understand. Keep up the good work, sir!!
I take it the computer that runs this power system is not a Windows based clunker.... RIGHT???? Windows 98???? But what actually prompts me to make this remark is how this car and its technology is a wonderful bridge between old school automotive thinking and design to this new era of e cars. The instructor is doing a wonderful job to use this car and the technology to get the huge number of automotive personnel ready to be professionally addressing new electric vehicles. This is a stepping stone, the car is a science project! Phantastic for learning!
LOL, no Windows. Thanks for watching
Watching you from the middle east, You are just brilliant! Thank you for this so much information
Thank you
I really start to worry when the channel stop uploading videos. And now I'm glad the professor is back.
Thank you!
Fantastic! My wife and I are planning on purchasing a 2022 Bolt EUV and I'm trying to learn as much as I can about the Bolt. Your video has been in people-speak, thank goodness!
Wow! Thanks Prof. Kelly for this thorough, very detailed review of the Bolt. You are obviously a very brilliant and learned individual, and this info is very valuable and useful to me as a new owner of a 2023 Bolt Premier. I will be coming back to this vid quite often, so much info! Great educators such as yourself are truly gifted. Thanks again for taking the time and energy to produce this. 🙏🏿4☮️
So glad to see you're back making videos, we were getting worried about you there, Professor.
Thank you very much
Had been a while! Glad you are OK Sir
Thank you
I don't see how this could have been explained in a better way thank you
We just bought a '17 bolt this week!(to go with our '17 volt) I thought I had run out, then this one pops up! Thanks, and welcome back!
Congratulations on your new Bolt EV. Thank you
Glad to see you post again.
Thank you
For any EV the charging features (fast/super/normal : AC/DC) are important. So additionally tell us about it, please. Good Video, thanks.
Noted! Thank you
Excellent! After watching this video I now realize there is a lot more to EVs than I knew. Fantastic job of showing how the Bolt EV is designed and works. Thanks.
Glad you liked it!
Wow.... I never thought such a high quality video exists on YT. I am definitely impressed how well all the information are organized and articulated. Hats off to you, sir! I just bought a 2023 Bolt EUV, and this video has been very helpful in understanding how my car works. I also have a Tesla Model Y LR, and I'm sure a lot of the info presented here will be somewhat applicable to that also. You've earned another subscriber! I just hope I can find enough time to go through all your other content...
welcome back. you are an amazing teacher
Wow, thank you!
Great video John. In the future, I would like to see a Tesla Model Y series of videos, especially on the heap pump system.
Noted, Thank you
I just watch these videos because I have a Bolt and enjoy seeing how everything works. Love these videos!
EXCELLENT!! I especially appreciated the shots of the disassembled components (gears, etc.). Your explanations were very clear and thorough (no wonder you're a professor!) And now I know what's under the hood.
First, let me echo the other posters and say, “welcome back”. You are an inspiration! Again, I’m happy to see the use of prime numbers where possible in the driveline gears. Do you ever plan to take a look at the Tesla Drive train? Mind you, Sandy Munro has already shown a lot, but from a completely different viewpoint Call me cynical, but wouldn’t the “maintenance requirements” be a sop to the dealership network?
Thank you. I have several Tesla powertrain videos coming soon
Yes I was surprised by the maintenance requirement comment on a bev, we don’t want that rubbish creeping into the new era of electric cars, kudos to Tesla and their team for no service no dealership, except by exception, driving by car parks of new cars was just daft, and like leaving them in the docks for a long time not great for the cars longevity either, have never liked dealership sales or service by marque
At GM the "engineering department of mechanical gear selector" was afraid of being without a job in the future so they allied with the "engineering department of huge useless actuators" and convinced management that that costumers would not buy the car unless they could hear gear shifting in a 1 speed gearbox.
LOL, I agree! So Funny
It made me thing they were looking to slot the Bolt’s drive unit into other models with a typical automatic shifter. Of course that has not happened yet as far as I know.
GMC is still doing CATALOG ENGINEERING, fail.
@sploofmonkey true this happened to me but covered under warranty
It’s unbelievably complicated what’s wrong with an oil cooler?
This is an astoundingly clear, concise, and thorough breakdown. Well done, Professor!
You are the best communicator of all the intricate parts pertaining to the electric vehicle and how they function together! You are very well versed in this field of electronics and I"m looking for more detailed information as time progresses! You actually took the amount of time needed to discuss every detail explicitly! Thank You so much!
Holy cow! He lives....
LOL, yes, more videos to come now we are in our new building.
I hope a wealthy alumni donates a Rivian to the school. That would be a nice teardown.
That would be nice. Thanks for watching.
Amazing! Prof Kelly Sir. You are a gift to the automotive world. You are so calm, collected and articulate and exact in your explanations. Please continue to do this work and may God bless you with good health, happiness and enthusiasm.
Hi Johm. You are just fantastic to explain how this things work. I am an 72 year old Danish mekanic, and i understand ewerything that you explain. Thank you so much.
Thank you very much
The return of the king
Thank you
Welcome back, Professor Kelly! I've been fixing vibrations with your nvh app while you were gone. For a drivetrain so beautifully simple, how the heck does reverse work? I imagined you were going to say the shifter is just an electronic switch that tells the inverter to swap 2 of the 3 phase ac signals to make the motor rotate in the opposite direction. I'm having a hard time understanding the setup GM decided to use here! Is cable coming off the black box just to control the parking pawl on the mainshaft?
Thank you. Everyone is scratching their head on the park pawl actuator system. It seems silly and unnecessary.
Reverse the motor rotation ?????
Thank You very much Professor John D. Kelly! Your knowledge and instructions about the BOLT EV is very important for all, also here in Brazil!!! Please, continue the tests and study about this amazing EV!!!
You are very welcome, Thank you
This was fantastic as usual with your videos. Can't believe how simple the Bolt setup is, that shaft through the center of the motor is brilliant.
Glad you enjoyed it, Thank you
You pulled one apart 2 years ago. At least it is real. The hummer ev is still in the clouds.
LOL, true
@@WeberAuto Now watch Sandy Munro: An engineer never retires, curiosity will never stop. Another Tesla? Sandy: I will strip it down no matter what it cost, I need to satisfy my engineering soul!
Hummer EV is very real and is hitting production soon
is there any reason why the manufacturers do not design the coolant system so that the heat is recovered for heating the cabin when required rather than using electrical power only for heating the water for the heater core?? - other than cost?
Teslas do, but it adds to cost, complexity, weight, and subtracts from reliability. Electric vs gas cost ratio is already great with 60-80% savings. Not worth the pain to gain a little more efficiency?
Welcome back, I've been watching old videos about the Bolt as a refresher lately.
More to come! Thank you
Its incredible to see how small the motors are.
Yes it is