Pre-Charge Circuits for Lithium-Ion Battery Packs

[@brandonescobarnavarro3498]

As always, is great to know you can still find useful stuff on the internet. Thanks for sharing!

[@kunal9346]

The entire series is super helpful - thanks for creating and sharing these!

[@frasersimpson8264]

Got to be one of the best / simplest explanations ever for something like that..........awesome work.

[@tuananhluu6622]

Very hellful series! Thanks for your sharing.

[@emperor4102]

What a great series of content Erik is making. Watched it all in one take. Hope there is more to come...

[@iruz21]

I have stuck for this section in our bms research. Thanks a lot for your video!

[@charlestresnicky1144]

I have been trying to find a good explanation on this, wow, superb!

[@adamozb]

Erick, you have excellent teaching skills!! congratulations !! I'm waiting for more videos!!

[@realtd8360]

Amazing. Clean and simple explenation, thank you!

[@orenbustani]

Eric, thanks a lot for all the videos, they are very understandable and clear, could you, please, also load videos on cell balancing techniques related to EV applications?

[@dhadumia]

That's a very burning question for me at the moment. Thanks for asking this to Eric. I have also asked it in my comment on this video. Let's hope we get a video on this soon.

[@PLC_Pursiut]

It comes back to 1st of system response in control system. Interesting stuff😊

[@PeaceChanel]

Thank You for All that you are doing for our Planet Earth.... Peace.. Shalom.. Salam.. Namaste .. 🙏🏻 😊 ✌ ☮ ❤ 🕊

[@muthuvelrajankaruppiah3671]

Very clear explanation!

[@_suryakiran]

Super clear explanation, Thank you!

[@carlosfranchi5043]

Thanks for the class Mister

[@portcranes97]

Very clear explanation sir,,,, Thanks for your effort to explain this topic. Thank you❤

[@Glockperfection666]

Love your engineering knowledge . Thank you !!!

[@Janamejaya.Channegowda]

Thank you for sharing, very useful video.

[@ketanpatel4799]

very well explained.. thanks

[@nishantgupta896]

Very nice thanks for teaching great work

[@7501966406]

Thank you sir Respect from India with true hea❤

[@rakeshverma-cu8ug]

Amazing explanation

[@angeltalamantes4508]

These videos are amazing

[@dhadumia]

Thank you Eric! Can't thank enough for creating such videos! Also, could you make a video on cell balancing? I have seen other youtube videos on Active Cell balancers. Not sure, if they are implemented by reputed BMS providers?

[@pramodsrinivas1822]

excellent explaination

[@Fotowoltaika-Hobby]

Simply, thank you

[@moonyu8163]

really helpful

[@priyankparikh434]

thanks Eric. Beautiful explanation!! Is there any other capacitive load except invertor that we need to consider for the selection of precharge circuit?

[@rodhoffman]

Is there a reason that the main contact switch can't be a power FET with slow initial turn-on time and diode for discharge (powering load)? While then when wanting to charge battery pack another power FET in opposite drain-source direction with another diode (opposite direction) so that both charge/discharge states can be enabled/disabled by BMS?

[@mtbmike9866]

Thanks for sharing

[@jamesalles139]

How to talk about inverters without saying "inverter". I prefer the feedback from a lightbulb with a proper voltage rating for manual use. thanks for the video

[@nguyenhoangvu401]

Really good videos! Could you make some video about concections type in battery pack : laser welding, spot welding... especially mechanical joint with different type of washer. I think preventing self loosen because of heating is very exciting

[@enochkoutchemon5727]

Interesting video. Pls when there is a pre charge failure, what could be the cause and how to solve it? pls. I have a BYD E6B that has a pre charge failure.

[@chriscflint]

Hi Eric, is there an expected life of the precharge circuit seeing as it is doing a lot of the heavy lifting.

[@jamesvandamme7786]

It doesn't do it for long. You just have to figure it out and spec it to withstand the power, currents, lifetime, etc. It's like a starter in an ICE car: usually it runs once then gets hours to cool off. But you can burn it up if you keep doing it over and over, so you have to detect that and prevent it. If your main contactor doesn't work, your precharge could still be connected and your main load starts, and that's when your precharge can burn up. Happened to me in a radar transmitter.

[@binulwijayasundara6109]

Your videos are superb and very helpful. Could you explain about the importance in compression of LiFePO4 cells during battery pack manufacturing. I keep finding several literature regarding the benefits of cell compression. However, the battery cell manufacturers provide us with a cell guard for each cell when manufacturing battery packs. When these cell guards are added, the compression of cells cannot be done. Should I add these cell guards, and not compress the cells? or should I not use these cell guards and compress my cells properly?

[@suntzu6122]

You mean like hydraulic press compression? Dont do compression of this type..

[@lukeshbramhapurikar6499]

Nice video sir

[@Jerbrown]

excellent

[@Jerbrown]

simply one of if not the best explanation videos I've seen. Thank you Eric.

[@serdiefgotreb]

How can I determine the capacitance of a 48v inverter? Both the battery system I'm building and the inverter I'm buying will be 48 v. Inverter is rated for 3000 Watts.

[@jamesvandamme7786]

Open it up and look inside.

[@bluehorntail28]

Thank you so much x

[@boussaoudfarid8297]

Hello everyone, first of all, thank you for the explanation. I have a question, is the precharge circuit in the battery pack or included in the converter (inverter) or is it a separate system?

[@priyankparikh434]

included in invertor

[@zachfpv4493]

It is supposed to be in the battery.industry standard is to have precharge upstream from the inverter.never expect the inverter to have precharge for inrush protection

[@boussaoudfarid8297]

​@@zachfpv4493thank you.

[@theclueless11212]

man that was good

[@davidcarmendy5244]

Thank you

[@santhoshc2786]

Post More Videos 🥰

[@MRsmith283]

Wow, that was amazing. I would request you to please upload more detailed topics like you mentioned for future videos. Thanks again for sharing the knowledge

[@pushkarpatil5567]

How 1000 ohm resistance selected?

[@jamesvandamme7786]

Ohm's law.

[@FourthWayRanch]

i'm making something with a 3kw hub motor with 80V batteries so basically a parallel circuit thru a 1000 ohm resister will work.

[@prathamsuthar4977]

perfect

[@loayhamid8610]

you really gave me a heart attack. i wish if there is a way to meet you.

[@eastwood111]

Huh!

[@tangyut5414]

wait... justin trudeau???

[@nishantthakur4181]

excellent