So why is Tesla and other major manufacturers buying them from BYD? Sorry your explanation doesnt seem to be based on facts just your own opinions. Tesla is well known for its poor build quality, poor fit and finish without driving it 60K.
My father owned a Chinese EV, you cannot comprehend what poor quality means, there is no floor there or comparison within modern US spec vehicles.
And as I also stated the Chinese can build adequate to a spec under pain of death, quite literally. Just because they can build a decent battery when they are quite literally under the watchful eye of an embedded representative of the other company in their factory, does not mean a whole car from them will meet foreign expectations. (True story, a requirement to have a factory in China is to go to extreme measures to ensure quality and accountability because the Chinese take Athiesm and capitalism to strange new unbelievable places)
So why do foreign companies use a Chinese battery?
Same reason hobbiest buy Chinese lifepo4
Cheap,
no cobalt or precious minerals (good PR),
non flammable & cold tolerant (cheaper battery conditioning system, battery heating/cooling systems are up to half battery cost)
Infrastructure, nobody has Lifepo4 infrastructure as it is a very young battery technology.
As to your apparent belief that all blade batteries are the same I see no evidence of that.
I would love for blade batteries to be the new AA , that can be transferred from any brand EV to another but it appears (based on commentary in a Chinese car forum, that blade batteries are still application specific and can be customized for each manufacturer to different specs.)
Would like to be proven wrong but I doubt we are entering a new panacea of reliable interchangeable parts, I also remain sceptacle of Lifepo4 having the same durability because it simply hasn’t had the life on the market to do 30 year durability testing, some of the antique obsolete chemistries can be made and have been tested for extra-odinary long lifespans for aerospace, lifrpo4 hasn’t
Worth noting, while Lifepo4 is slated for use by many manufacturers only 2 actually are in current production and only represent a small percentage of their production.
Sodium batteries have the same packaged density as Lifepo4 and are much more tolerant to overcharging, over discharging and below zero climates. They are already in overseas EVs, I can buy them as an hobbyist and these will likely overshadow lifepo4 as the low cost option.
Sadly I’m a realist, batteries need to be in use many decades before they are perfected, any chemistry that hasnt been in use more than 20 years (lifepo4/sodium) and has never seen aerospace duty is very likely to have unforeseen teething pains.
Oddly most of the teslas towed during the Chicago blizzard had Lifepo4 batteries, possibly sntidotal but the folks who own them Have been posting live streams of much greater winter range loss than they had in previous gen model 3’s
