2018 Chevrolet Volt 355.2V Li-Ion Battery - Deep Dive
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- Опубліковано 28 чер 2024
- Grab your popcorn and get ready for all the boring technical details you have been craving!
TIMELINE
0:00 *Introduction
3:25 Under-vehicle view with battery installed
5:42 Battery removal
7:05 Under-vehicle view with the battery removed
11:15 Exposed battery "roll-around"
12:06 Battery tray
12:30 Battery tray inspection plug
14:26 High Voltage safety warning
15:32 Battery sections
16:00 Battery modules and power ratings
16:38 Battery cell groups
19:20 Battery configuration summary
20:50 Cell group identification/numbering
22:50 MUST SEE - Cell group demonstration
23:30 MUST SEE - Parallel cell group individual Li-Lon cell
24:35 **(See note below) Cell group Ah rating versus cell group Wh rating error I made
24:45 MUST SEE - Cell group cooling and cooling plate
29:35 Battery section 3 installation with lifting adapter (first attempt)
30:50 Personal Protective Equipment (PPE) usage
31:10 Battery section 3 installation with lifting adapter
40:20 Battery cell group electrical configuration
42:50 MUST SEE - Parallel cell groups and bus bars
44:30 Overall battery negative terminal
45:10 Cell group voltage sensing lines
46:25 Battery cell group voltages
49:15 0.3V Cell ground voltage differential and cell balancing
50:00 Battery cell voltage testing tool
57:00 Battery section 2 installation
58:10 Battery section 1 installation
59:15 Coolant hose connections
1:05:17 Battery cable harnesses
1:06:55 Battery section temperature sensors
1:08:55 Installation of battery negative cable
1:12:25 Installation of battery positive cable and series cables
1:15:53 Battery service disconnect plug discussion and safety demonstration
1:18:45 Installation of voltage sensing and temperature sensor harness
1:22:22 Battery Energy Control Module (BECM) installation
1.25.00 Battery relay assembly components
1.25.27 Battery relay assembly electrical connections
1:31:40 Battery coolant heater (1.75 kW)
1:34:35 Coolant manifold fittings
1:41:15 HV current sensor (fine and coarse resolutions)
1:42:50 Positive contactor
1.43.30 Negative contactor
1:43:40 Coolant heater transistor module
1:44:10 Plug-in Charger contactor
1:44:50 Coolant heater 450V 10A fuse
1:45:20 Pre-charge resistor
1.45.35 Pre-charge contactor
1:46:50 Battery relay assembly low voltage ground circuits
1:47:35 Coolant hoses
1:50:18 High Voltage fuses and cover with interlock
1:51:54 Battery service disconnect plug components
1:52:15 Service plug high voltage interlock circuit
1.52.55 420V 350 amp fuse
1:54:34 Service disconnect plug positions for removal
1:56:54 Installation of battery relay assembly on the battery tray
2.01.40 Overall review and battery "roll-around"
*Series Hybrid Clarification:
The 1st generation Volt is a series hybrid in 3 out of 4 modes of operation of the 4ET50 transaxle. The fourth mode (Electric Only Combined Engine On) is a series-parallel mode.
The 2nd generation Volt's 5ET50 transaxle has 5 modes of operation. Two modes are electric only, one mode is a series-hybrid mode, and the Two remaining modes (series-parallel) allow the ICE to contribute torque to the wheels through the planet carrier of the input gear set. This transaxle is used in a Malibu Hybrid with only 4 modes (they removed the series mode).
**1st generation Volt battery. If an individual cell is rated at 55.5Wh (using units of measure) Power (Wh) = EMF (V) x Current (A), then the current rating would be Wh/V = Ah. So 55.5Wh/3.7V = 15 Ah rather than the 55.5 Ah I mistakenly said/displayed in the video.
This is the first is a series of videos on the 2 generations of the Chevrolet Volt. This episode covers the removal and detailed reassembly of the 355.2-Volt battery and battery relay assembly from a 2018 Chevrolet Volt. The 2016-2018 Chevrolet Volt batteries are the same. The 2011-2015 Chevrolet Volt battery is similar but has some minor differences.
ABOUT US
Weber State University (WSU) Davis Campus - Automotive Technology Department - Advanced Vehicles Lab. 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
This is no insult, but I used this video to fall asleep last night. Love the material when I’m awake, but the soothing baritone describing cell groups helps a lad sleep well too
LOL! Thanks for the feedback!
I'm doing the same thing! These great videos are somehow therapeutic, yet very informative :-)
@@WeberAuto Its like Bob Ross! but being a Volt owner I can't help but try to follow along.
Ha ha!!!
I really got a charge out of that comment. 🤣
I fell asleep to a video on American natural gas vs Russian and energy policy and woke up to this. This guy is something else.
Excellent tear down. Being a bolt owner, and electrical engineer I already knew most of what was in here, but it was nice to see it actually taken apart.
Thank you! We have a Bolt on our shop hoist. We are disassembling it next month. Videos to follow.
Whoops, I meant to say VOLT owner but slip of the finger hit the B.
I have a volt, but will soon have a Bolt too for the wife, so yes I will be watching your video of that one too. They are great cars, as you already know. I have had mine for 6 years now.
WeberAuto Exciting to hear it. The battery temperature control of the Bolt sounds really interesting. The BMW i3, I believe, uses the same concept of cooling fines (sandwiched between cells) over a big cooling plate. The industry seems to be settling on that design for now, with a few exceptions. Tesla does their own thing, and Nissan doesn’t seem to care about temperature control at all (the horrible battery life of the Leaf reflects that, IMO.). This neat stuff. Thank you for teaching us the future. I don’t even care about gasoline vehicles anymore. That’s like learning about the latest film from Kodak.
I still like the technology on the volt over the battery only opotions because, even though the volt I drive rarely needs to go into the gas extender, it is nice to know that it is available if needed, and need it I do when I go on my yearly road trip adventures. There is no battery car, tesla or any other that can go where I can go in my volt, which is basically anywhere that any car can go. The bolt would be fine for my wife, or daughter that never travel more than 100 miles in a day, but for me, when I am on a road trip, I can do 600 or 700 miles each day for 3 weeks straight as I head across the country to see what is there basically. For me the gas backup is necessary.
My favorite car of all time. My wife and I have leased 2012, 2014, 2015, 2017 volts and I bought that last one I leased, the 2017. 66k miles... still averages 60 miles per charge and has been getting 46 mpg on gasoline. Great fun watching this deep dive.
I know, they're F-ink awesome! I have 2 2012 Premieres, my "main one" has 130K and the "backup" has 203K...I have to say the leather seats and interior on both vehicles still looks great! I was met with disbelief when I told the guys I work with the miles...
I'm an owner of a 2018 Volt. I love the car, it's the most enjoyable car to drive that I've ever owned, To me hybrid is the only way to go, good economy without losing performance. For my purposes I just can't see going total electric, I wish GM still offered hybrids, for larger framed people a larger hybrid car would be nice.
Thank you Professor, this is in very detail explanation, which I haven’t seen in any other else’s video, your students must be proud having you there 😀👍🏻
Thank you very much!
Mr. Kelly that was a great video!
Thanks for sharing!
Thank you!
I'd think this is boring, but once I began, I just kept watching - I was totally hooked :)
Thanks for this teardown, what a fantastic piece of work! Still waiting for a deep dank dive on the the 5ET50 transaxle. I have a feeling these Volts will be in service for a very long time and it would be a great resource for those doing out of warranty repairs themselves.
I'm also waiting for the 5ET50 transaxle video!
This is a great example of excellent teaching skills, and an amazing explanation of the workings of the Gen 2 Volt HV battery. Well done and thanks for your efforts.
Thank you!
@
Thank You Mr. WEBER - For Opening My Mind For VOLT 2018. You Are Really Smart And Nice Man!
Thanks Professor Kelly. for this outstanding video. As a 2017 Volt owner I find this fascinating. You are a gifted teacher and communicator for sure.
Great job teaching safety as well as the technology. Super happy to see this on UA-cam. You’re setting your students up for success with these good habits.
Thank you
The volt was truly the pinnacle of Chevrolet's engineering. The future is EV and this car is an awesome introduction into whats to come.
Thanks for watching
Wow, this kind of in depth video was amazing. I never expected to find something so detailed.
Thank you very much!
It appears the DIYers will have a challenge removing the batteries from this vehicle ; however, you mentioned GM has done well with this setup. I really like the coolant inspection hole under the batt tray- gives you heads up to problems. Picking up the batt modules will be tricky without the sling!! Thanks Professor for this very detailed look into the Volt!
Thank you!
Thanks to Weber State and to the sponsors for this outstanding series. Professor Kelly does an excellent job and I look forward to learn the details of the Volt by watching all videos.
Thank you very much
I have a 2012 and can get up to 35 miles. what is very good for the Chevy volt is that they created a great service manual so a good mechanics could trouble shoot the volt. This was done to increase the ability to get this relatively new EV serviced
Great job! Very clear video and audio and precise description of parts, steps, etc. I have Chevy Bolt EV (that I will never be inside of like this) but it's good to see the detail that has gone into the construction of these GM battery packs for the Volt. Thanks!
Thank you! I will have a Bolt battery disassembly video soon too.
Professor Kelly, I really appreciate you sharing this! I'm considering a Volt, and knowing you own one says a lot.
Prof. Kelly you even went more in-depth than GM's own engineers in technical discussions.
Thank you very much, I like go get as much detail as I can find about these topics
Outstanding professor. You are the very model of a teacher/educator/instructor. You deserve an honorary doctorate for the time and effort you have put into this astonishing repository of information.
Thank you!
That was amazing! Thank you so much for sharing, I will love a work like yours, it has to be so great to get your hands on to all this fascinating technology and teaching it to all your students. I can see that you love and enjoy what you do. God bless you professor.
Thank you very much!
Raising chicken is a poultry business we have in our country in Asia.
RC
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You are a Great Teacher you do not assume that your students know anything so you leave no gaps in the instruction. Many teachers leave to much out and the students nod like they understand. line upon line precept upon precept Good Job
Thank you very much!
Having a Volt for 6 months and now just getting a bolt, I am fascinated to watch you go into such depth in the workings of my car. Looking forward to seeing the bolt spill it’s secrets.
Thank you!
Amazing work. Thank you for sharing this detailed tear-down. After doing some video editing I can appreciate at least a small portion of the work that you put into this.
Thank you! Yes, the video production is very time consuming. It took years of technical training and experience, 5 Days of setup time, 9 hours of raw video, 14 hours of editing, and a 2 hour long video is the end result (too long). The nice thing is that I can show my students any portion of this video, or the whole video, any time I want without having to do it all again. Have a great day!
Fantastic video. I have a 2017 Volt and this really helps me visualize and understand how my car works. Looking forward to your next videos.
Thank you!
Thank you for an excellent masterclass in the Volt.
Thank you!
Yes indeed!
Your Battery Pack class was so much more detailed than the one I attended in prison.
When the Guard/Instructor mentioned Parallel Cell Blocks ... a riot broke out. 🤣
This is a great video. So much information and put together really well. Thank you for making and uploading it.
Thank you!
YOU ARE THE FUTURE OF EDUCATION. YOUR LESSONS ARE WELL PLANNED AND EXECUTED. YOU ARE A MASTER AT CLEARLY COMMUNICATING…AND YOU HAVE SHARED YOUR KNOWLEDGE WITH 1,000s. THANK YOU FOR SHARING YOUR TALENTS.
Thank you!
Here in Chandler, AZ, I have been working on these since their inception in 2011. I have only worked on/repaired the internals of the battery pack 2 times. Once for a BECM and once for a High Voltage Interface Control Module. I work on Volts several times a week and the vast majority are for low coolant from air pockets trapped in the cooling system and occasionally a bad HV battery coolant level sensor along with your typical software updates.
Thanks for your feedback. As you probably know, the vacuum tool works great for removing air from those systems and for leak checking. Have a great day!
how do those batteries hold up in the Arizona heat?
Very educational.
How can i get ahold of you? Im in phoenix.
@@cridenh2owo257 the batteries hold up exceptionally well longevity wise but the actual charges dont last long due to the heat in the summer requiring the coolant pumps and fans to turn on while charging to prevent overheating as well as the HVAC system being on.
Great video! All your videos look like high quality educational resources and I plan to watch them all. I would really love to see a teardown of the charging circuits in the trunk!
Great suggestion! Thanks for watching
Like the Timeline menu section of different parts of the video
Thank you! It is a lot of work. I am glad you like it.
The budget your school allows for this class is amazing! I'm very impressed!
Thank you!
Awesome video. Thank you for taking the time to produce this.
Thank you!
It's amazing to see how far this technology has progressed in a very short amount of time. That huge batter pack just to provide 40 miles of range. And now GM has a pack almost half that size and provides 250 miles of range - amazing
Which pack is this? Thanks!
@@DanielSwick the 65kwh LG Chem pack that the current version of the Chevy Bolt uses. The next gen of Chevy Bolt is supposed to switch over to GMs new Ultium battery pack
Professor Kelly, I believe you are mistaken at the beginning of the video when you mentioned that the 2018 Volt is a series hybrid. While the first generation Voltec powertrain (2015 model year and earlier) was a series hybrid system when in extended range mode, the 2nd Gen Voltec powertrain is a series-parallel hybrid. The 2nd Gen Voltec engine has multiple distinct hybrid modes, including: the ICE can turn motor A as a generator to supply power to Motor B and the battery as Motor B provides propulsion (generally at low speeds), but the majority of the time when in extended range (hybrid) mode, the ICE is supplying some or all of the power directly to the wheels through Planetary Gear 1, basically load sharing to varying degrees with Motor B (the primary traction motor) providing power through Planetary Gear 2. The ICE can also supply 100% power to Planetary Gear 1 and Planetary Gear 2 with Clutch 1 closed while Motor B turns Planetary Gear 2 forward or in reverse to control ICE torque and RPM. The the ICE is linked to Planetary Gear 1 and 2, Motor B can even syphon energy off Planetary Gear 2 to provide energy to Motor A and the battery, so that Motor A can apply power its power to Planetary Gear 1.
I apologize if I am mistaken about what you meant by series hybrid, as I assumed you were referring to the ICE only powering a motor-generator to provide power to the main traction motor which applies power to the wheels. Or more simply, that in a series hybrid, the ICE doesn't output power directly to the wheels. While this was true of the 1st Gen Volts, it is not in the 2nd Gen.
I am a big fan of your videos, especially in regards to EV and Hybrid vehicles, and thank you for all the hard work and detail you and your students put into these videos.
Thank you! You are correct. It is my understanding that the 2nd generation Volt's 5ET50 transaxle can operate as a series-parallel hybrid transaxle, but it can also act as a series hybrid. It has 5 modes of operation. Two modes are electric only, one mode is a series hybrid mode, and the Two remaining modes allow the ICE to contribute torque to the wheels through the planet carrier of the input gear set. I hope to have this 2018 Volt 5ET50 removed and disassembled in the next month. Then we can see what it really can do. It is confusing, especially when this transaxle is used in a Malibu Hybrid with only 4 modes (they removed the series mode). Thanks again for your feedback. I learn so much making these videos; I also learn a lot from great feedback like yours. Have a good day.
Awesome video! I took apart my second gen Prius battery down to individual cell packs to see how it all worked. Just got a second gen volt and decided watching this video would be the safer option this time.
I'm bummed this series of videos wasn't continued. I'm interested in how the coolant cabin heater functions as well.
Prof. Kelly, I have decided to actually subscribe to your channel. Something I rarely do. I find the attention to detail you provide extremely fascinating and the video is hardly boring. I cant imagine why you would call it that. At any rate, the obtainable knowledge here is invaluable to myself as well as anyone interested in how EV.'s operate in general. I have been trolling many you-tube videos to gain knowledge on how to go about building or even manufacturing a battery bank for my solar array of 7 K watt for my home. Making this stuff myself is actually much cheaper to do than purchasing the components and brings it into a budget range I can afford . I am a semi disabled rebuild tech of 1920's assembly line machinery and electronic bench tech. , so thankfully I have the ability to do just that with a bit of additional knowledge. Exactly the kind you are providing here. Without it my task would be impossible and I am afraid may not be possible at all. This is exactly the kind of knowledge necessary for working on this stuff, also something I still do often , ( work on vehicles ) Technology is changing extremely fast and if you want to be able to do this stuff you have got to keep up with how it works. I am afraid that this knowledge is something you absolutely will not and can not get from the manufacturers . Only way to get it is hands on experience of happen across something like your channel. Luckily I found you as in no way could I afford a 2018 vehicle to disassemble and dissect like you have done here as well as label every little piece AND most importantly explain exactly how it works and what its doing. I also do not believe anyone who owned one would want me poking around in theirs. THANKS so much for your work here, its absolutely invaluable to me.
Thank you very much! Best wishes!
Thanks to you and WSU for producing these videos and making them available for everyone to learn from. I am not sure if I will ever tear into a vehichle to the level shown in the videos, but it has greatly improved my understanding of what all is going on.
Thank you
To me one of the most amazing parts is that he re-assembled the battery with his lineman gloves still on. They are pliable, but quite clumsy for fine tweaking. Very well done!
Additionally, if I ever have to to a cell replacement on my car, I'll re-think it many times before entertaining the task!
Thank you! Yes, the gloves made things more difficult.
Thank you for putting your time into making the video and explaining the details :)
Thank you very much!
Very informative and you did a great job explaining this thoroughly. Thank you for sharing!
Thank you!
Thanks so much for this and all your videos. Delighted to understand the technique behind the performance.
Thank you!
Love your videos! Thanks so much for taking the time!
Thank you very much!
Thanks again. This was the battery detail I was interested in knowing. Good work
One of the best videos I’ve seen on UA-cam!
Thank you!
Thank you for the detailed deep dive! Great example of the Maker Spirit -- "I'm always taking things apart that I am not supposed to."
If you can't open it, you don't own it as we say . . .
Thank you very much!
Wayne - You are oh so right. I’m going on 77 years, and clearly recall my mom scolding me when I again was taking something “else “ apart. Actually, I honestly don’t think she minded one bit. Dave in Phoenix
thank you ，i spend two hours learning the Chevrolet Volt battery deep dive,While this takes you a day,not counting video staff.
Thank you
Excellent series on the Volt 👍
Thanks for doing this video, I am an old retired mechanic and interested in mostly the reuse of some of the EV batteries for solar energy storage. It's a little frustrating the way they connect individual cells together with the spot welding. I think the Nissan Leaf batteries are some of the most useful, but I will continue to research for availability and pricing. It doesn't hurt to learn how they are connected and tested in the vehicles though. If I live long enough I'm sure I or someone in my family will be owning a EV. My son is a firefighter and any safety tips are a real necessity for him!
Thank you!
Lloyd, hello from Dec 2021. Hope you're pleased with how the EV battery use/re-use stuff is going! The spot welding is apparently necessary to avoid heating the batteries unduly - I suspect you're aware of that by now. I've been interested in re-using those batteries, even just intact and stored somewhere out of sight, but I doubt they'll be going cheap. Cheers.
That was exceptionally instructive. Thank you.
Thank you for doing this video. I hope these parts last a long time. The assembly looks VERY expensive! As a retired Auto Electrician/Mechanic, I can't help but see and think of all the possible intermittent's and other problems in this assembly. Past experience with non hybrid vehicles has taught me that.
Great Video Professor Kelly!
Thanks for your feedback
Keep using the wiggle test for those pesky shorts it helps at times
Sir, I think you were destined to become a professor. Your voice is so amazing, I can't help but latch on to every word you say. You should do audiobooks, podcasts or something to really make some money. Just a thought. I randomly stumbled upon your channel and I love it!
Hi Thank you for amazing videos.For tightening torques for the hose clamps, VW has two tools VAG 1624 (100-500Ncm) and VAS 6494 (1.5-3.0Nm).We use these for interior fittings in plastic.Best regards.
Thank you! I did not know that
I love my 2nd gen volt, what a great video, thank you Professor Kelly!
Thank you!
Interesting lecture, thank-you. At 30:20 , the lifting adapter arms appear to have a screw-locked clamp to allow you to set the distance between the arms, thus allowing the arms to drop neatly into the slots provided in the safety cover. Fitting into the slots also stops the arms sliding off the battery group ends when in place, if the t-bar locks are not tight.
Thank you, you are correct, I misunderstood how the covers and the lift fit together
Congratulation Prof John. I've never seen things like this, with so much details.
For us in our country these videos are amazing. I said to my coworkers, everytime the Prof john surprises with valuable themes.
I work as trainer in an automotive company and I realize after these videos we have a long way, but it become pretty easy with these helpful support.. Perfect.
Ricardo Felippe
Thank you very much!
Very great detailled video. Thank you. Only thing I missed as an electronics engineer is a look onto the BECM inside / PCB.
Thank you! I did have it apart, but forgot to show it.
Your students are lucky to have such an amazing teacher.
Thank you very much!
Ме: i am too lazy, to check the oil level......
WeberAuto: we will disassemble the whole car, and reassemble it again!!
YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
He is getting paid/people expect him doing it ;)
VERY VERY VERY GOOD JOB. THANK YOU FOR ALL THESE EXPLANATIONS
Wow, it was amazing break down. Thank you so much.
Thank you for this very interesting video, Sir! It is all very well explained and easy to understand. Your students are very lucky to have such passionate man as you to teach them this fascinating technology. Excuse my English, I'm French guy who tries to do its best. :-).
Thank you very much!
Thank you for this comprehensive video. I own a 2017 Volt, and like thousands of other Gen2 Volt owners, the Battery Energy Control Module (BECM) was replaced on my car because of a manufacturing defect (NHTSA is looking into this issue). Now I know what the Chevrolet technician did to perform that service. Although I appreciate the engineering of the car, I question how well GM will provide parts support for the Volt moving forward since the model was cancelled in 2019. Engine EGR valves are now failing because of a design defect, and no replacement parts are available and that's been the ongoing situation for months. In the interest of reliability and piece of mind, I'll likely trade in my Volt on a 2024 Honda CR-V Hybrid or Toyota RAV4 Hybrid/Prime PHEV. Thanks for your videos on the eCVT in those vehicles, too!
Great video, very informative!! Thank you
Thank you!
"This is our car and we can do what we want to it" My man! That's the right attitude.
LOL, Thank you!
Amazing information here! Thank you so much for sharing! I think the Battery heater on my 2012 has gone out and this helped me confirm my thoughts about the heating and cooling of the battery!
Interesting as usual. If only every professor could explain thing like you...
Thank you very much!
you're doing gods work here, stunning how complete and well done this video is
Very good professor!
Thank you!
You inspire me to learn about this newer technology, thanks
Excellent video I wish I were young enough to make use of this information.
Wow thank you very much. That was really informative. Great Job!
this channel is awesome I'll always sub to this. I've learned more and just a couple of videos on this channel, then I have in 20 years of working on vehicles. thank you.😁💯💯💯
No one does it better. Thanks for all of the great information.
Just bought a volt. Thank you for the video
This is the only time I have seen someone put the pack back together.
Thanks Proffessor superb description. Really great detail.
You are welcome!
Sir your explanation and work is mind blowing
Thank you
Hi and greetings from Norway. At 1:53:10, the talk are about a fuse of 350 amp, and you say it's rated at 20 000 amp before it actually melt.
I think that 20 000 amp rating is the short circuit current that fuse can break for sure, without internal arc. It melts at 350 amps or so.
Thank you, I had that wrong.
Thank you for the great video. Im a firefighter and will share your video with other members of my department
Thank you!
Me sizing up what a DIY BECM might look like. I'm gonna look like Marv from Home Alone in that one scene..
Thanks Professor Kelly for the great video!
Incredible video! Well done!
Thank you very much!
Thank you for a wonderful video explaining the battery of my new '18 Volt. I have one small correction. The 20,000A AIC rating of the Bussman fuse is the interrupting rating, i.e. the maximum amount of current that it can safely "interrupt" or stop when it blows, without self-destructing. This current is the range of current that might flow during a (bolted) short circuit. For comparison, a typical circuit breaker in a house panel has an AIC rating of 10,000A. Many power system fuses have an interrupting rating of 200,000A. (AIC = ampere interrupting capacity)
Thank you for the correction! I misunderstood that rating. Have a good day!
Well done. Another great video. Congratulations.
Sir, you have a very soothing voice
very cool! really enjoyed this pro video. Can't wan't for the Bolt deep dive.
Thank you! The Bolt deep dive will be a fun project!
Great video for Further Diagnostic Technician
Thank you!
Excellent Prof. Kelly.
Thank you very much
Thank you for a great video explaining in details about the Volt battery assembly. I am very impressed at the well thought out design from GM concerning this hybrid system. I get the feeling they probably have more "younger" engineers working on this Volt hybrid system than the regular internal combustion car design. But this is just speculation by me.
Thank you, and thanks for your feedback!
Your very amazing! I'll be visiting your training very soon!
Thank you so much for this video. Educating
Thank you very much!
Well, that ends my thought that electric vehicles were simpler than combustion engined vehicles. Thanks for the very clear explanation.
Such a gifted teacher!
i'm still not convinced these are an honest way forward but if they get me out of differential school then hey, ya gotta love 'em!
The car looks new. It's super clean love it.
Thank You from Germany, from an Opel Ampera Owner
Thank you!
Always world class info - thanks.
Just a note your 30 mv is indicated in the screen text as 300 mv (around the 49 min mark).
Also, I guess there is no automatic defective cell bypass.
I have worked on many spacecraft, and the bypass will provide a way to keep operating in event of a failed cell.
Thank you! The 300 mV difference indicated on the screen is correct. i found the specification after shooting the video and included it in the final edit. You are correct, no cell bypass. Luckily, failed cells have not been an issue with the Volt. Other manufacturers have not been so fortunate. Have a great day!
Very good information John thanks
Thank you!
An impressive video and impressive video production skills. Thank you
One of best demonstrator in the world