Alright, let's take this angle.
Can you prove that LG Chem is not making any profit out of selling cells for $145/kWh?
Do we even know how much Panasonic charges to Tesla? For all we know, Panasonic could be charging Tesla less than $145/kWh and making a healthy profit margin. So, for LG Chem to charge $145/kWh, that could be higher than Panasonic's price (ie., maybe 10%?) and it's also possible that LG Chem is taking a lower profit margin. But it doesn't mean that they're "losing money" by selling cells at $145/kWh.
It is a big boost of validity for Samsung SDI, LG Chem, and SK Innovation, to have Tesla not only interested in your cells (Tesla tests cells from all over the world anyway) but wanting to ink a deal for supply. And according to the article I posted earlier, Samsung SDI and Tesla were in final stages of talks in inking a deal to supply TE cells. I'm not saying that this proves that LG Chem and others' cell prices are as low as Panasonic, but if we assume that Tesla is/was actually serious about inking a deal, then I think it's evidence that Samsung SDI (and probably others) cells were close in quality and price to Panasonic's cells. When I say "close" it could be marginally higher in price... but it still needs to be attractive enough for Tesla to be that serious.
@mrdoubleb, you mention volume... and that does give an advantage with costs, but the question is how big it that advantage. Note that I never claimed that LG Chem had the "same" costs as Panasonic... I think they are higher but probably not by much (ie., within 10% or max 15%). The chart you linked to also was just for EV batteries and doesn't show manufacturing production for all lithium-ion batteries, including non-EV. But again, even if Panasonic holds a large volume advantage, it doesn't necessarily mean that LG Chem can't make money at $145/kWh... especially in the case where Panasonic let's say hypothetically can make money at a lower price.
LG flipping out over GM disclosing cell cost... I think Panasonic would do the same if Tesla disclosed their cost. Again, volume partners get special, preferential pricing that isn't available or even known to others. Just because it's special/preferential doesn't mean the company (whether it's Panasonic or LG Chem) is losing money on the deal. They're pissed when others find out about the special prices because it makes their lives more complicated when selling to non-preferential partners.
Also, what is Panasonic's special tech/innovation that allows them to have such a drastic price advantage over LG Chem and Samsung SDI? Panasonic makes better auto cells. But from what I've seen, there's nothing super special with Panasonic cells that make them super cheap to produce that other companies can't do.
I know people here want to believe that the competition is light years behind. But I think take a step back and think about Tesla's overall mission... It's a great thing LG Chem is selling cells for $145/kWh. It helps with the overall mission to expedite the transition to sustainable transport.
Alright, how about we all end this conversation with this... let's make a compromise. How about we say there's a chance that LG Chem is making a profit on $145/kWh? And that probability we leave to each person to decide. But I don't think it's accurate to say there's "no chance" LG Chem is making money at $145/kWh... I just don't see any convincing evidence that backs up that claim.