Tesla's Battery Tech Explained: Part 2 - The Module

[@johnteran8889]

Since I saw your last video I must tell you that this one was highly anticipated.

[@EVTechExplained]

Glad to hear it!

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@aswathm78]

I was looking your channel every week to check for this video . I honestly thought something terrible happened to you and thats why you couldn't post new one . Good to know you are back

[@EVTechExplained]

Soery for the delay, life was crazy busy. Hopefully part 3 will come sooner than part 2 came after part 1!

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@francisgaliegue6645]

Just as interesting as the first video in the series... Looking forward to part 3 :) It has been some time since part 1, but it has been worth the wait. This channel is underrated!

[@EVTechExplained]

Thanks! Part 3 will be coming soon.

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@aaronclu]

i was confused as to how tesla was so effective at pulling heat from the batteries and this video explained it perfectly! well done! thanks

[@MrAjgreenfeld]

First, all of the videos in the series are phenomenal. They are each very informative and very interesting. I was wondering if you could explain what you mean when you say, “they join the positive and the negative terminals on the same end of the cell, rather than on opposing ends” . Again, great series/channel overall.

[@EVTechExplained]

Thanks! Yes, the entire can of the cell is actually the negative terminal, and only the small tab at the positive end forms the positive terminal. As a result, the top shoulder is actually still part of the negative terminal thus you can connect both the positive and negative terminals with exposure only the The positive side of the cell. Wording this without an image is challenging. I'll try and find a link to show an image.

[@MrAjgreenfeld]

Thank you for the explanation. If you can find an image I would appreciate it. But I think I get it.

[@EVTechExplained]

kzbin.info/www/bejne/eaGmo56FZt1gh9Em19s

[@MrAjgreenfeld]

Funny enough, I saw this right before your response. That being said, I very much appreciate the link. And once again, I want to complement you on the quality of the videos.

[@karich21]

Very educational. I'm sure this took a lot of time to put together. Thanks very much!

[@807800]

Cell - module - the pack. I would suggest you make a fourth video about the future of these. What's the current stuff that's in development so far that would eventually replace these? . Or maybe, are these all we got for the foreseeable future?.

[@EVTechExplained]

Thanks, great suggestion. Future technology will most likely be the next video on this channel after the 'Tesla Battery Technology' series is complete.

[@807800]

EV-Tech Explained That's surely gonna be interesting.

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@VijayNinel]

Thanks for the great video. Very well researched and explained. Subscribed and looking forward to more such videos.

[@EVTechExplained]

Thanks. Part 3 will be coming soon!

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@koeniglicher]

There is a mistake at 0:40 - "First generation battery packs 85 an 90 kWh consisted of 15 modules". That's wrong. It was 16 modules: 16s 6s74p. 3:19 - Powerpack/Powerwall *Version 1* shared the 18650 cells. Only Powerpack/Powerwall *Version 2* contains the 21700 cells of NMC type. 6:29 - The stated 2.5V minimum voltage is a very low discharge voltage. Typically, this is rather 2,8-3 Volts to reduce degradation.

[@EVTechExplained]

You are absolutely correct on number of modules - I'll add an annotation as a correction!

[@stevemartin8994]

Excellent videos

[@codygocam]

No, the 85 and 90 have always had 16 modules. 7 on each side and 2 in front. They improved the chemistry on the cells to gain the 5kwh and then used the more compact twin cooling system to create the 100 pack with more cells.

[@etbadaboum]

Fantastic once again! Thanks one more time.

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@etbadaboum]

That's great. Great work all around. Really love it.

[@Lukehot215]

There are two versions of the S and X battery pack. The newer version, which has a set of two thinner coolant tubes, provides more space per-module for batteries and gives Tesla the ability to provide the 100kWh capacity.

[@EVTechExplained]

You sir are correct! Let me know if you come across any good pictures of them!

[@Good-Enuff-Garage]

excellent video, you explain things very well, could you please explain "nominal" in layman terms?

[@temuman3029]

Thank you so much it’s so helpful

[@Pol-ud4uz]

What is the excatly the thermal interface material ? what you covered the parts. Thank you

[@ogpwr]

Would you please elaborate more on the white potting material surrounding the batteries? What is its function?

[@johnthomason8462]

On the Tesla S 5.2kWh battery pack there is a pcb with a 10 pin plug socket. What is this socket for ? We have a Tesla battery which we want to use with a solar panel array, and maybe this socket has some significance?

[@Diazodinitrophenol]

Could I use snapshots from this video in my mechanichal engineering thesis regarding battery systems?

[@EVTechExplained]

Sure, please do

[@GaneshNayak]

Good video. A question. The cells that are at the output end of the cooling tube, would on an average get lesser cooling, as compared to those on the near end, when the coolant is just entering and hence colder. Will this not lead imbalance in cells within the module over long term? Is there a way to take care of this which Tesla has figured out ?

[@EVTechExplained]

This will lead to an imbalance. Their are multiple techniques to resolve this, such as tuning the flow rate around the module, however these do add extra cost and it does not appear that Tesla have implemented these techniques.

[@roymusiclyrics420]

Does changing 6s86p will matter in kWh?

[@dondarreb5536]

two very important questions: 1)management of failed batteries in the module, generally I find proper bms is most important topic in Li batteries family, and I am always looking for other people opinion on this subject as I don't find myself still comfortable in this topic. 2) fire resistance of tesla module especially comparing to the standard multi-pouch packages found in other EVs.

[@poojasingh2752]

Thanks for the great work!! This wavi cooling channel however will increase the pressure of coolant pump,so how they managed to connect wavy channel to the pack level?

[@Bakkilakki]

Does the colling channel inlet pipe has any orifice in it?

[@vishaldama9771]

Can i get a detailed information on how are battery pack modules made for prismatic cells and a little more information on busbar selection

[@TechX080]

Im looking for ev bms kit, any company sell bms?

[@WhatYourGrandpaSays]

Hi EV tech, thanks for the explanation. Do you happen to know if there is any manufacturing process information about tesla e battery?

[@eifermegacorp3559]

Can we change the series and parallel connection of the module, suppose series connection is 6 and and we want to make it 13p by reducing the parallel connection, is it possible on this pack

[@ronroberts110]

I've heard that the bus plates are aluminum (rather than nickel-plated copper). Can you find out if it is 6101 Al?

[@theoschijf8155]

Thanks. Great video.

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@yuriypukhkalo8792]

You mixed up a positive and negative terminal in your video. Top view facing BMB, on the left is a negative on the right positive terminal.

[@franciscoshi1968]

Do you know what the temperature difference between the coolant and the cell surface on the opposite side of the cell is for a discharge rate of 2C?

[@Krugmaster]

I would like to know if it is possible to use a bms on the 6s batteries. Is tesla balancing this Battery pack on 3.7 Volts or 25 volts?

[@EVTechExplained]

A BMS can be used on a pack of any size, however you would really want to be balancing each series string, meaning balancing will occur at cell voltages (

[@eyeopeningtruth7518]

Does lithium batteries needs ventilation system? What can be done to improve safety from battery explode?

[@prashantjangam8807]

How the cooling pipe is inserted between cell. As cooling pipe doesn't seems rigid one.

[@konstantinknoche860]

Awesome video, thanks for sharing. Do you only refer to the P100D tho? Thought the cooling would look different and more like the model 3 design with 2 pipes instead of one.

[@Taugeshtu]

Hey there, great video! Do you suppose it would be safe to mount a model S module in a vertical fashion, on its side? See no problem with cooling, but mechanical structure is not elaborated on in your video...

[@luongmaihunggia]

1:28 where can I buy that cooling pipe?

[@EVTechExplained]

Probably from somebody selling Tesla module parts

[@luongmaihunggia]

@@EVTechExplained link? I need a way to cool my 18650 cells.

[@shubhampathak991]

Can you please show the wire bond on both side of each cell how it is done & If possible please tell me specification of wire bonds.?

[@shubhampathak991]

What bms we can use for these batteries which are large no of cell?

[@norbertvjack92]

What’s this batteries operation temperature? And on winter time the batteries temperature goes down when the car standing on driveway or the bms maintaining the batteries temperature even when the car not in use?

[@moestrei]

There is a resistive 3kW battery coolant heater and the car will use energy from the pack to heat the pack when its temperature drops below 12 C. In operation it is around 30-40 C maintained by the speed of the 2 battery fluid pumps. From 47 C the battery gets actively cooled by the air conditioner system with the battery being priotized over the cabin.

[@VivekJade]

Thanks for awesome video I have one question how they have connected BMS, 6s means they have made connections to only end of the connecting strip, if we use Orion bms do we need to connect each cell individually or connecting stip end connection is suffice purpose.

[@jordansmallwood4605]

What doesn't make sense to me is the refrigerant is applied at the beginning of the module which leaves those batteries at the end of the module with no thermal gradient to deposit their heat. There's probably a better design out there.

[@EVTechExplained]

There most certainly is a better way. The challenge is doing so without increasing cost and manufacturing complexity in a meaningful way.

[@steveclunn8165]

@@EVTechExplained and another question would be is it really necessary at all. Might be more case of needing to heat the batteries in very cold weather. Nissan Leaf batteries are not cooled and the stress there under is considerable compared to Tesla as they are 60 amp hours compared to Tesla's 200 a h. This can also be seen in the range a leaf with its 75-mile range is putting a lot of more stress than a car with a 300 mile range. I'm not saying I know for sure just what I see. I was hoping to see what the peak amperage I could be pulled from this pack and how low they let the voltage sag under the extreme load?

[@gollygui209]

Anyone know why don’t Tesla use 2170 in the newly refreshed Model S & X?

[@mostlymessingabout]

Can you make a comparison of thermal management system? How the battery is heated and cooled, linked to the AC, radiator system etc. Jaguar makes a big deal about their system. I wonder which is better

[@ninjakille316]

Video 3 isn't out yet? I guess I will brave the patents instead.

[@EVTechExplained]

Part 3 will be coming soon though happy to answer any questions.

[@EVTechExplained]

Part 3 is now available: kzbin.info/www/bejne/n6u4nWVujtmEmKc

[@refusoagaino6824]

Volume?

[@louteix9981]

My biggest issue was how does the coolant interact with the cells,...got it! Thank you

[@Sumitraut277]

Hey ...can anybody show how the cells in a module are connected in series and parallel using wire binds and busbars. What is a wire bond? Where to get them?

[@ryannguyen7466]

That's the bane of Tesla being made in US and most parts they made in house. It will be hard to find 3rd party parts or China bootleg parts for self repair.

[@patricktheattorney]

Can you explain the reasonS why a Tesla battery might catch on fire? I have seen on the internet different Tesla models catch on fire when: 1. just being parked. 2. parked and plugged in for charging. 3. driving down the road. 4. and after a crash. Let's assume a 2022 model 3, hits a dip and the bottom of the car hits the roadway, the car crashes by striking a 8 inch curb, the car hit a tree too, 3 minutes later it explodes into a ball of fire. Q1: can i hire you to help me develop theories of 'why' the 2170 design had some faults and why they catch on fire. Q2: does the 4680 battery fix any problems with the 2170 catching fire?

[@Muonium1]

need to turn up the volume

[@EVTechExplained]

Thanks, will make sure this gets fixed.

[@hekk_tech5975]

what happened with the sound? part 1 was dope, part 2 cant hear anything

[@EVTechExplained]

Sorry- should be fixed in future videos!

[@douglazamar8889]

so 16 modules new pack 25k so each 1563$ used sell for ~1450 on ebay, worth it? how could i use it as 12v instead of 24v, thats the video am looking for...

[@EVTechExplained]

You would have to start cutting and re-arranging the bus bars....

[@paulrhodes7696]

Presumably soldering an insulated wire to the middle of the battery module would give you two separate 12v power-supplies, (12v between the soldered wire and the positive terminal, and another between the wire and the negative). So when looking at the video at 4min21s, the wire would be soldered anywhere on the bus-bar at the extreem RHS of the "bottom view". No cutting of the bus bars would be necessary, but each 12v supply would have to be used independently, eg on two separate electric motors in each wheel of a bicycle perhaps.

[@steveclunn8165]

@@paulrhodes7696 the bus bar that they use to connect all these cells together does not lend itself to the soldering. But there's plenty of space to put a screw in between the cells and screw it terminal right to the bus bar. The little wires from each cell that are connected to the giant bus bar are all welded. Click on my profile picture and look through my video collection to see how I did this

[@t-serviss]

85 and 90 have 16 modules!

[@sticks29pgm29]

Can barely here you. Turn up the volume please.

[@Jodyrides]

When EV batteries need to be replaced. The old batteries have to be disassembled to be recycled .. that is going to create an industry because it takes technicians hours to carefully disassemble each battery..There will be millions of them

[@kishoremsn8242]

Each 21700 cell is 4.85 Ah but why tesla uisng only 3.4 Ah.. its only 70% of actual. So, with number of charge and discharge cycles .. will tesla maintains same 70% through out the life ..life starts decreasing from 70% to 80% of 70%..

[@controlyourfuture5477]

You forgot how much it weights .

[@ophello]

Don’t ever Center bulleted text. Looks horrible. Just left align it, or hide the bullets.

[@artworld1909]

How the Tesla calculated temperature of cell

[@JoseCampos-ux6vo]

👍

[@namenotshown9277]

74 cells in parallel: you know its impossible to distinguish between these cells whilst they are connected in parallel.........therefore there is NO cell level monitoring in any ev's battery pack. Sad but true.........when will this be solved? Look at it this way: 6S 74P pack.....thats 444 cells 74 cells in parallel are basically monitored as a single cell ( cannot distinguish between cells): so 74 out of 444 cells are monitored or 17% of the pack. The reality is less than 20% of a packs cells are being monitored is one way of looking at it. It very rarely this point is raised as a weakness in the electric vehicles, in fact its very rarely raised at all, most people continue to say that there is monitoring at an individual cell level.....which is not the case.

[@russoventura8691]

Disculpa pero estos es más que sinceros o claros digamos estando en nuestros planes abandonarme de esta manera es de técnicos o técnica despojo and or other membership Just loque nos da vida es amor simedas desconfianza es traicion

[@fading_starz4070]

STUPID DESIGN