EV Battery Manufacturers: CATL, BYD, LG and Samsung
Who are the largest EV battery manufacturers? CATL led global EV battery installations in 2025 with 39.2%, followed by BYD with 16.4%, according to SNE Research figures cited in CATL's annual results. LG Energy Solution remained the largest non-Chinese contender, while Samsung SDI focused on lower-volume premium cells. The wider shift is geographic: the IEA says Chinese producers supplied almost 75% of batteries deployed in electric cars in 2025.
Largest EV battery manufacturers by 2025 market share
The battery market is now a scale contest led from Asia. CATL and BYD alone supplied 55.6% of the capacity installed in electric vehicles in 2025. LG Energy Solution, CALB, Gotion, SK On, Panasonic and Samsung SDI form the next tier, each with a different balance of chemistry, customers and regional factories. Market share measures installed gigawatt-hours, not cell quality, safety or profitability, so the ranking is only the start of the comparison.
Share of GWh installed in EVs worldwide. Tap to compare full-year 2025 with 2024. CATL gained share, while BYD and the three Korean makers lost ground. Source: SNE Research.
1. CATL: The Company That Sets the Pace
Technology
CATL (Contemporary Amperex Technology Limited) is the largest EV battery manufacturer by installed capacity and supplies a broad set of carmakers. Shenxing targets fast charging with LFP chemistry, while Qilin is a pack-integration concept intended to use volume efficiently. LFP avoids nickel and cobalt and generally offers lower cost and strong cycle life, at the expense of lower gravimetric and volumetric energy density than leading nickel-rich cells. It also tends to have greater thermal stability, but chemistry alone does not make a pack safe. Cell quality, propagation barriers, cooling, sensing and vehicle crash protection still decide the outcome.
Growth Strategy
CATL is also pushing beyond cars into markets that are only starting to electrify, such as construction machinery and shipping. Both use far larger batteries than a car, so they are a logical place for a cell maker of CATL's size to grow next.
Regional Strength
- China: Dominates the domestic EV battery market with strong governmental support.
- Europe: Expanding its presence, with the Hungarian plant positioning it to meet rising demand for EV batteries in the region.
2. LG Energy Solution: Korea's Answer to CATL
Technology
LG Energy Solution (LGES) built its name on nickel-based (NMC) cells but is now adding LFP to reach cheaper, entry-level cars, the part of the market CATL and BYD already own. It is also moving to cell-to-pack (CTP) construction, which drops the middle layer of modules and slots the cells straight into the pack. That cuts cost, saves weight and frees up space for more cells.
Growth Strategy
With EV demand growing more slowly than expected, LGES has shifted from building new capacity to getting more out of what it already has. In the US it leans on the tax credits in the Inflation Reduction Act (IRA), and in Europe it holds long-term supply deals such as the one with Renault. Filling its big new plants while demand is soft remains the hard part.
Regional Strength
- United States: Benefits from the IRA and supplies several US automakers.
- Europe: Relies on long-term contracts, but faces slower demand and direct competition from CATL and BYD.
3. BYD: The Carmaker That Makes Its Own Cells
Technology
BYD is unusual because it is a carmaker and a battery maker at once, which is a major reason it climbed to second place. Its Blade Battery uses long, narrow LFP cells in a tightly integrated pack. That format can improve structural and packaging efficiency and performed strongly in BYD's published nail-penetration demonstration. The useful engineering lesson is vertical integration: cell format, pack, body structure, power electronics and vehicle controls can be designed around one another. The tradeoff is that much of BYD's battery volume is tied to its own vehicle demand, unlike a supplier serving many unrelated platforms.
Growth Strategy
BYD sells at both ends of the market: cheap models that move in huge numbers across emerging markets, and a halo brand, Yangwang, with cars like the U8 off-roader. To get around tariffs and shipping costs it is building plants abroad, including in Thailand and Brazil, so it can make cars closer to the buyers.
Regional Strength
- China: The best-selling car brand in its home market, electric or otherwise.
- Southeast Asia and Latin America: Winning share fast with low-cost models as these markets start to switch to electric.
4. Samsung SDI: Smaller Volumes, Premium Cells
Technology
Samsung SDI is the smallest of the four, and it competes on quality rather than volume. It builds high-energy-density cells aimed at premium and performance cars, where range and packaging matter more than the last euro of cost. It is also one of the companies furthest along on solid-state batteries, a technology that swaps the liquid electrolyte for a solid one and promises more range and better safety, though it is not yet in mass production.
Growth Strategy
Rather than chase volume, Samsung SDI sticks to its premium niche and its deals with luxury carmakers. It is also pushing into stationary energy storage (ESS), the grid- and home-battery market, which is growing quickly alongside cars.
Regional Strength
- Europe: Close ties to premium carmakers give it a foothold in the luxury EV market.
- Asia: A solid home base, though under growing pressure from CATL and BYD on price.
Summary Table: Key Insights
| Company | Technological Focus | Growth Strategy |
|---|---|---|
| CATL | High energy density, LFP batteries | Expansion into machinery and shipping sectors; new Hungarian plant in 2025 |
| LG Energy Solution | LFP, cell-to-pack (CTP) technology | Shifting from growth to optimization; using US IRA incentives |
| BYD | Fifth-generation DM hybrid, Blade Battery | Focus on luxury and mainstream markets, expanding global manufacturing presence |
| Samsung SDI | High-density EV battery cells, solid-state tech | Expanding premium partnerships, exploring energy storage systems (ESS) market |
Who Leads the EV Battery Market?
On today's numbers the answer is clear: CATL leads, BYD is second and pulling away from the rest, and LG Energy Solution holds third. The four makers in this article cover most of the market, but they are not the only names that matter. CATL's main competitors also include SK On and CALB from China and Korea, and Japan's Panasonic, Tesla's long-time supplier. The chart above tracks all seven.
- CATL leads installations and manufacturing scale, with a broad carmaker base.
- LG Energy Solution is filling existing plants rather than building new ones, with the US and Europe as its key markets.
- BYD is the fastest riser, helped by making its own cells and selling cars from cheap to ultra-luxury.
- Samsung SDI stays in the premium niche and is betting early on solid-state.
The bigger picture is how concentrated the market has become. The IEA says Chinese producers supplied almost three-quarters of batteries deployed in electric cars in 2025. Korean and Japanese makers are defending positions through overseas plants, customer relationships and nickel-rich expertise. Solid-state cells could eventually change part of the order, but manufacturing yield, qualification time and cost will matter more than the first laboratory energy-density headline.
How to read an EV battery market-share ranking
Installed capacity counts the gigawatt-hours fitted to vehicles, so a supplier attached to high-volume cars or large packs rises quickly. Cell production can include inventory and stationary storage. Factory capacity is only a nameplate figure and may be far above actual output. Mixing those three creates rankings that look precise but answer different questions.
Market share also says nothing directly about warranty risk, fast-charge durability, cold-weather performance or profit per kilowatt-hour. A supplier can gain share by discounting cells into one booming customer, while a smaller competitor earns more from premium contracts. The defensible comparison checks volume, chemistry, customer concentration, regional manufacturing, yield, pack integration and financial resilience together.
CATL vs BYD vs LG vs Samsung: the useful comparison
| Maker | Scale position | Core strength | Main tradeoff |
|---|---|---|---|
| CATL | Global #1 | Broad OEM base, LFP scale, rapid pack and charging development | High exposure to China and trade restrictions abroad |
| BYD | Global #2 | Vehicle and battery integration, Blade LFP, cost control | Much of its volume is tied to BYD-group vehicles |
| LG Energy Solution | Largest non-Chinese contender | Global plants, major Western OEM programmes, nickel-rich cells | Share pressure and expensive capacity utilisation |
| Samsung SDI | Premium niche | High-energy cells and solid-state development | Far lower installation volume |
Cell chemistry also affects the owner after the car leaves the factory. Continue with EV battery lifespan, the solid-state battery reality, 800-volt charging architecture and our battery degradation calculator.
For the engineering context, follow a cell into the vehicle development process, see how APQP and PPAP control supplier evidence, or use the automotive engineering hub to connect batteries with the rest of the car.
Sources, checked July 24, 2026: CATL's 2025 annual-results release cites SNE Research for its 39.2% share. The IEA Global EV Outlook 2026 reports that Chinese producers supplied almost 75% of electric-car battery deployment in 2025 and separates output, manufacturing capacity, chemistry and profitability.
EV batteries: frequently asked questions
Who is the largest EV battery manufacturer?
CATL is the largest. It reported a 39.2% share of global EV battery installations in 2025, ahead of BYD at 16.4%, using SNE Research data.
What was CATL's EV battery market share in 2025?
CATL reported 39.2% for 2025. CATL and BYD together held 55.6%, while the IEA says all Chinese producers together supplied almost three-quarters of global electric-car battery deployment.
How do CATL, BYD and LG Energy Solution differ?
CATL sells broadly across carmakers and leads in scale. BYD combines battery production with its own vehicle business and is closely associated with Blade LFP packs. LG Energy Solution has a strong global manufacturing footprint and a larger exposure to nickel-rich chemistries, while adding LFP.
What is the difference between LFP and NMC batteries?
LFP avoids nickel and cobalt, is generally cheaper and durable, and has lower energy density. NMC stores more energy for a given mass or volume but uses costlier materials and needs tighter thermal control.
Does Tesla make its own EV batteries?
Tesla makes some cells and packs, but the IEA reports that most of its EV batteries still come from established suppliers such as Panasonic, LG Energy Solution and CATL.
What is Samsung SDI's position in the battery market?
Samsung SDI is much smaller by installation volume than CATL, BYD or LG Energy Solution. It competes in premium applications and continues to invest in high-nickel and solid-state technology.
