More than half of every lithium-ion EV battery made on Earth now comes from just two companies, both Chinese: CATL and BYD. Add the rest of China's pack makers — CALB, Gotion, EVE, Sunwoda — and the country's share of global production comfortably clears two thirds. No other layer of the automotive industry is this concentrated, and none matters more: the battery is roughly a third of an electric car's cost. Whoever controls it controls the price of the car.

That control did not happen by accident, and it did not start at the factory gate. It was engineered over two decades, layer by layer, from the mine to the module.

Start at the rock

China itself mines a modest share of the world's lithium, cobalt and nickel. What it does is refine them. Roughly two thirds of the world's battery-grade lithium and cobalt is processed in Chinese refineries, and for battery-grade graphite — the anode in nearly every cell — the share is higher still. Chinese firms spent the 2010s buying what geology denied them: Tianqi Lithium took a major stake in Chile's SQM and Australia's Greenbushes mine; CMOC bought the Tenke Fungurume copper-cobalt complex in the DRC; CATL led a multi-billion-dollar nickel project in Indonesia. When Western automakers went shopping for battery metals in the 2020s, they discovered the shelves had been quietly reserved years earlier.

The greenhouse years

Downstream, the story is one of deliberate industrial policy. Beijing began subsidising electric vehicles in 2009 and, crucially, from 2015 tied those subsidies to a "white list" of approved battery suppliers that excluded the Korean and Japanese incumbents. For four formative years, LG, Samsung SDI and Panasonic were effectively locked out of the world's largest EV market. Inside that greenhouse, CATL — spun out of the Apple supplier ATL only in 2011 — grew from a start-up into the world's largest battery maker. The white list ended in 2019, but by then the game had changed: scale, cost and an entire domestic ecosystem of cathode, anode, electrolyte and separator producers now sat within a day's drive of the cell plants.

The LFP counter-revolution

China's second masterstroke was chemical. While Western and Korean makers chased ever-higher nickel content, Chinese engineers rehabilitated lithium iron phosphate — LFP — a chemistry the industry had written off as too low in energy density. BYD's Blade battery in 2020 and CATL's cell-to-pack designs clawed back that deficit at the pack level, while keeping LFP's advantages: no nickel, no cobalt, better thermal stability, longer cycle life and a dramatically lower cost per kilowatt-hour. LFP went from an also-ran to the majority chemistry in China's market, and it is the single biggest reason Chinese EVs reached price parity with petrol cars first. Tesla, Ford and Stellantis all now buy or license Chinese LFP technology.

Speed as a moat

The less visible advantage is iteration speed. A cathode tweak that takes a Western supplier a year of qualification can move from lab to production line in a quarter in Ningde or Shenzhen, because the customer, the equipment maker and the materials plant are often in the same city. That cadence produced fast-charging LFP cells, sodium-ion batteries for entry-level cars, and the semi-solid-state packs now appearing in premium Chinese models — each commercialised while competitors were still publishing roadmaps.

What it means if you buy or import Chinese EVs

For dealers and fleet buyers, the supply chain story translates into three practical facts. First, cost: Chinese-built EVs carry a structural battery-cost advantage measured in thousands of dollars per car, which is why they undercut rivals even after tariffs. Second, durability: LFP packs tolerate daily 100% charging and routinely outlast the vehicles around them — a meaningful argument in fleet economics. Third, continuity: the same two suppliers dominate cells for nearly every brand in this guide, from BYD to Zeekr to Volvo, so parts and chemistry expertise travel well across markets. The battery was the hardest part of the electric transition. China solved it first — and that, more than any badge or spec sheet, is what the rest of the industry is now racing to catch.