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Recently, a senior BYD executive said that the company was preparing to supply batteries to Tesla soon. So, what happened between then and now?

In 2008, Buffett believed in BYD and invested $230 million. A lot have changed since then, and his investment is now worth $9 billion. He still retains his shares despite the rumors.


Elon Musk never gave up in his efforts to develop the most advanced EV battery technology. In his last attempt to lower Battery cost, and increase efficiency and range, he developed the 4680 format (46 millimeters wide and 80 millimeters tall).
But, not everything goes as planned, especially with difficulties in sourcing nickel, cobalt and aluminum raw materials.

More recently, there has been a market shortage of nickel and aluminum, both of which are exported by Russia.

On the other hand, phosphate is much easier to source and so far, are reliably cheaper. This means that LFP lithium-iron-phosphate batteries can be much cheaper than cobalt-based batteries.

Tesla announced in October 2021 that it was switching to LFP batteries for its standard range models, both Model 3 and Model Y. And, BYD has been making LFP "Blade Batteries" since 2020, for use in its own cars and for sale to other auto makers, such as Toyota.

BYD Blade is not only cheaper, but the company claims that their longer and thinner Blade batteries, are far less prone to catching fire, even when severely damaged.

Fire and explosions are the biggest problems of lithium ion batteries. Electric vehicles from Tesla, Hyundai, General Motors and NIO have all experienced battery fires from overheating.

On the other hand, the BYD Blade Battery has successfully passed the industry's a nail penetration test. During the drilling-stress tests carried out during their development, these Blade batteries did not emit any smoke or fire. The Blade battery pack was also heated in a furnace to 300 degrees, crushed, bent, and overcharged to 260% without catching fire.

The Blade battery increased available pack space by over 50% compared to conventional cylindrical lithium-ion phosphate batteries, which gives the batteries a higher energy density as more cells can fit.

Supporting the fact that Tesla is about to use BYD's blade battery, is that BYD has built an LFP battery factory in Pennsylvania.
Other rumours suggest that BYD's Blade batteries could be used in Tesla's compact and affordable EV, that will cost under $25,000, and offer a range of around 250 miles.