The electric car company said profits climbed 17 percent in the third quarter as strong sales of energy products helped to make up for relatively slow auto sales.
General Motors and the South Korean automaker say they will collaborate on new vehicles, buying parts and clean energy technologies.
The government is aggressively promoting electric cars. But a dramatic blaze in an underground lot has left some potential buyers worried about safety.
A new report estimates that the company led by Elon Musk accounted for just under half of all battery-powered vehicles sold in the second quarter of the year.
More efficient manufacturing, falling battery costs and intense competition are lowering sticker prices for battery-powered models to within striking distance of gasoline cars.
Automakers and dealers are starting to offer discounts, low-interest loans and other incentives to lure buyers as the supply of cars grows.
Southern political leaders say a win for the United Automobile Workers would threaten their economies. Activists want to strike a blow against a system they say exploits the poor.
Manufacturers like BYD, Tesla and Li Auto are cutting prices to move their electric cars. For gasoline-powered vehicles, the surplus of factories is even worse.
Do we really want America to become a backwater of bloated, expensive, gas-guzzling cars?
It and other foreign automakers are trying to exploit upheaval caused by new technology to gain market share from their dominant rivals.