[remy_martian]

I noticed that one from TI as well and am thinking about using it if I can ever get my battery config and layout to settle down. I believe it's a catalog part

All the fanboys gloat about Tesla's battery management tech...I believe that also came from TI.

So, no...not ghetto.

Problem is RF can't get through a metal module case, so need to work around that. Not difficult, but nothing is free.

 

[remy_martian]

Forgot to mention: it may be impossible to resurrect a crashed Ultium module without dealer tools 👎 Even then, the master will likely be locked down.

 

[remy_martian]

The entire system is inside a faraday cage - the metal battery box. It's also very near field, meaning next to no power on the transmit side.

The passives component count, though, seems huge, so it's not exactly a slam dunk and most of the wiring is still there inside the module afaik.

 

[remy_martian]

The datarate is pretty low, so I'm guessing it's short and spaced packets

 

[remy_martian]

Well, if you think about it, General Motors are system integrator numbnuts, so we're all working off TI app notes 😂

 

[remy_martian]

Yes. We used to lurk in these kinds of user ghettos for ideas and perspective, though a video takes a few weeks to get produced and signed off so not in this case.

I almost got fired for producing one of the first app videos in the semiconductor industry to go on a website. Group-hug company never did anything first, lol. I also worked for a company mentioned in this thread for a bit 🤓

 

[remy_martian]

They may be cheap, but what's cheap when there's no stock and you need a letter from the Pope to get samples and more than 1-1/2 pages of the datasheet, not even showing the g-damned pinout?

And $1200 for an eval board for a $30 part? 😂😂😂 I chewed my guys out for that kind of idiocy for our semiconductor products. Build enough boards to go around AT COST...

This is the f*ckery of designing and building anything these days. No stock, 52 week lead times, and attitude. And the lack of components ripples through the rest of the car's decisions all the way to the battery stack 🤬

I'd swear China is buying up every bit of semiconductor stock to screw the West, but my tinfoil hat is out for powder coat.

/rant_off

 

[remy_martian]

Yes. I stand corrected. GM is allegedly using ADI. Wireless BMS is going to be locked down, making it a total PITA and will need factory boards replaced.

$1200 is the cost of an engineering evaluation board. These are not intended to be sold to consumers and are sold in very limited quantities.

Nobody can explain the chip shortage other than game console instead of car chips blah blah blah which is BS. Somebody has bought up and is hoarding everything. Every corner is cleaned out.

Watch what happens when the hoarders open the flood gates after the industry has "caught up".

 

[remy_martian]

^^ Switched...