Tesla Model 3 Battery Cell Internals and Disassembly



This episode we look at the inside of a Tesla Model 3 Battery Module, and then dissect the 2170 itself and talk a bit about the chemistry, parameters, costs and advantages of this new lithium ion battery cell.

We also begin to resurrect our third Tesla Model 3 salvaged wreck and talk about 12v batteries and pyrotechnic fuses and fluid flow interlocks.

Souvenir single Model 3 2170 cells available:

More on this video:

38 Replies to “Tesla Model 3 Battery Cell Internals and Disassembly”

  1. James Fox

    1:00:00 'If you make the cathode thicker it can store more energy…but makes it harder for the lithium ions to inter-collate into the tetrahedral crystalline structure of the anode…chuckle chuckle…and slows it's ability to make current.'
    Nice, real nice.

  2. Dodger N

    Hi Jack I love your shows, you are obviosly well knowledge and experiended in your area. Perhaps you may want to consider breaking up your videos in 15 min or max of 30 min segments rathern than just having onve video for 2 hrs. Thnx

  3. Washington Digital

    Very much in agreement about the engineering smarts of the Tesla team. From your show and some other sources it is pretty clear that Tesla seems to consistently put out a great solution to solving various engineering problems. I am interested in what they had done with the magnets in their swith reluctance motor which you also discussed. Tesla does not , it seems , just accept resting on their Laurels and/or coasting (having created a good design), rather they keep improving and also pushing the boundaries. It would be interesting to see your review of any new "Maxwell Battery" based on advances from that soon to be acquired company. I believe you will provide a good understanding of how (I suspect yet again) Tesla is so often on the leading edge of research in producing better battery (and other engineering) solutions. Always interesting Jack … hope to get my hands on a Model 3 once they come to Australia … may have to wait though , perhaps the Shanghai factory may spur things along.. Thanks for your insights..

  4. Sudhir Moolky

    Very detailed and informative, kudos to you. You have a lot more knowledge than the disrespectful jerks who comment here and are unable to contribute anything positive to society.

  5. Ayo Deveneaux

    I would like to buy a few of the cleaned 21-70 cells. How do I purchase it from you guys? I have a model 3 and I want to keep one or two as souvenirs and show people who ask me what powers the vehicle. Thanks.

  6. George Hawley

    Love the opening. Might think about a diet, Jack.😉 You might want to think of capacity in terms of kWh. The EPA test revealed an available capacity of 78.2 kWh for a Model 3 LR pack.

  7. D Stanoev

    You should never ever bridge a pyro fuse! This is a terrible idea from safety and legal stand point. Moreover if it's only $15.
    Mr. Rickard, I have a great respect of you even if this is only the first time I came across your channel. As an electronic engineer I highly value people like you and your level of knowledge. But! This pyro-fuse is there for a very good reason, having a very high capacity battery exposed to harsh environment and potentially very high risk of shorting out in case of an accident. Hence it's a pyro-fuse triggered by the airbag control module and not just a regular fuse. BMW uses the same safety mechanism in all their ICE and EV cars for over 20 years now.
    According to the Law, tampering with or any modifications of the Airbag system, which this pyro-fuse is, translates to a Class A misdemeanor and you can go to jail for that! Please, never ever publicly give advise to people to do so, as it is strictly against the law. I highly recommend you to edit this part of the video. And please, delete my comment afterwards, I don't want you to have someone bashing your content.
    Keep up the good work and stay in good health!

  8. Nirpendra Patel

    Hi Jack, Can you make a video on Maxwell Tech because its looks like Tesla Roadster and Semi numbers were based on Maxwell Battery Design ( 300 – 500 kW / kg ) and not Tesla/Panasonic ( ~260 kW / kg )

  9. jeales895

    I believe that silicone is for thermal conductivity, as well as physical stability. Similar thermally conductive silicones and adhesives are used in electronics.

  10. The Stress Theory of Hans Selye

    This morning I stumbled across the news that Tesla is purchasing Maxwell, Inc. which manufactures "super capacitors." This portends substantial improvements in Tesla range, charging times, and general performance in the near future. I would expect that the Maxwell super capacitor technology will be incorporated into all the upcoming Tesla vehicles, beginning with the Model Y. It may also be possible to modify the battery packs of the older Tesla cars to incorporate the advantages of super capacitors. I'd be interested in your comments on this development.

  11. bwilson4web

    For those funky, security fasteners, you might try: (1) cheap socket set, (2) mold release, and (3) JB Weld. Treat the fastener with a mold release compound. Pick the smallest sacrificial socket that most fits over the fastener head. Fill the sacrificial socket with JB Weld, PROTECT socket driver, and push on the security screw/bolt head. Once the JB Weld 'sets', remove and let it cure. For a little more durability, mix a fiber (i.e., cotton, fiber glass flox) which will make the JB Weld nearly metal strong.

    You'll want to test the mold release on the bench with the JB Weld to make sure it remains the weakest mechanical link between the security bolt/screw head and the JB Weld.

  12. Michael Skjold Petersen

    Thanks Jack. Some people say that EV batteries will "degrade" a little bit if one charge it to 100% capacity every day/time you charge the car. Whats your take one that compared to the "magic rock" that ain't chemistry but just holds charge?

  13. Michael Vallicella

    I think the main reason the 75kWh was canceled was it was limited to 100kW charge rate at superchargers and they are finally getting competition on faster charge rates. It wasn't that big of an issue when 120kW max but when they roll out Supercharger v3 they will really look slow.

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