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Bro on the left is definitely stoned

You know how to do a electrochemical noise test with the squidstat plus?

Shockingly informative!

What was the voltage and the current selected for each experiment?

Another very great video from you Luke and Erika. Thanks you! I am curious about the opinion of Luke regarding the magnetic field around charging cables at 2500Amp DC becoming potentially dangerous for pace maker or even the requirement for higher strengh cable clamping inside the car because the interrupt current of a 100V 1000Ah battery is probably way higher than a 400V 250Ah battery right?

@47:10, Are the fiberglass pack enclosure a good solution to teh corrosion problem from the casing perspective? ( for exemple the chevy Volt packs?) and also about "breathing effect" on packs, are the Gore-tex breather a good partial or full solution? to preserve pressure equilibrium but restrain humidity passage?

Very interesting subject ! It make me think of the DIY community using "fish paper" as structural or electrical insulator on top of the cylindrical cell.. It is also a kind of Battery Murderer System to me as it trap moisture and keep it for extended period and make slow short pretty close to the cells tab! What is your opinion about that product that I thnik should never be used for battery assembly?

30:00, About the recycled second life packs idea, Would it be a great idea of using very low flow of inert gas like nitrogen circulating in the used packs to continuously or periodicaly purge the pack to reduce the effect of humdity or any other ionic path inside the pack to compromize the insulation? Thanks for sharing your awsome knowledge my Luke and thanks to Erika too!

22:14 Like and Erika, What influence the monolithic encapsulation effect can be on insulation resistance values compare to non encaplulated ( potted) pack? I guess it should be higher and more stable?

Another thing when balancing is that It happen at high SOC meaning sometime the recharge will need to be extended until the lower cells meet the higher cells voltage and will require to keep the battery at high SOC voltage for more time than when it is normally well balanced.. and so over the cycling the cells that are low will require the fully charged cells to remain longer time at full charge state while being bleeded, than the one that still continu to be charged. This will make the sooner charged cells to age faster than other and it will get a kind of chain reaction as the impedense grow and ake these to hit the HVC quicker and quicker and be bleeded often and often.

What is interesting also is the location of the BMS with his bleed resistor that sometime tend to change the thermal equilibrium in the pack while balancing/charging and make some cells to warm more than other because they are closer to the bleed resistors than others.. and so their internal resistance get lower, than the rest which will contribute to unbalanced them relative to the rest of the cells. Thanks for the video Kuke, Brian and Erika.

Can we do galvanostatic charge discharge study in squitstat plus

I know some unofficial Tesla shops repair battery packs by simply disconnecting the faulty cell from the parallel cell group making it from e.g. 86p to 85p. What are the challenges you see with this approach? It naturally increases the current and heat generation in other 85 cells, but naturally the increase is not that large as the parallel cell group is so large.

Excellent video. Very well explained !

Thank you for sharing the wisdom gained from your hard won experience!

Why?

Awesome 💜

👍

Very informative! Thank you so much for doing this, Luke and Erika!

Way to go Electric Goddess! Making the world a better place!

Thank you for sharing.

Hey Luke since the day you did a discussion on thermal runaway propagation being a topic leader on Battery Brunch - I've been a fan of yours. Thanks for an insightful podcast again. Simply enjoyed each bit. Thanks for sharing. Cheers to Bryan and Erica

I learned a lot! Thanks so much!

I am a fan of large batteries that use 52V because that is the highest voltage that common power back-up inverters will run (labeled a nominal 48V). When a pack is degraded enough that it only has half the range that it had when it was new, it can still work as a home power back-up to provide 120V AC during a power outage. For someone wanting 28S, you could series two 14S packs...also, a 14S pack can be made from two seriesed 7S packs...

Awesome to see Erika and Luke!

Great idea and super interesting! Looking forward to hearing more from you two!

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Hey, I’ve been there before!

Excited to listen in on conversations with folks at Electric Goddess! Great first episode, how often can I hope to hear new episodes?

I would love to see more episodes on specific issues with building packs. I love all the nerdy stuff and you never hear anyone talk about these kind of real issues that just isn't sensational enough to ever hear about in mainstream EV news. Maybe even hands on examples when it's possible!

🌈 🔋 Great video! I love to see and hear about the alchemic magic that the team at Electric Goddess is working on

Congrats Luke! Looks like you guys are doing amazing work!