CATL alone held more than 40% of global EV-battery usage in 2024, with BYD the clear number two, while the top five cell makers together control about 65% of worldwide lithium-ion capacity [S1][S6].
The combined share of the three Korean makers (LG Energy Solution, SK On, Samsung SDI) in global EV-battery usage fell to 15.6% in Q1 2026, down 2.1 percentage points year on year, as Chinese suppliers continued to absorb share [S8]. For BESS and EV pack buyers, this concentration is the single most important commercial fact: cell-maker choice is now a near-duopoly decision, with cell chemistry and form factor as the main differentiators [S1][S5].
Top-5 cell maker concentration and 2026 share split
The lithium-ion battery market is moderately concentrated, with CATL, BYD, LG Energy Solution, Panasonic, and Samsung SDI controlling roughly 65% of global capacity [S1]. CATL remained the largest EV-battery maker worldwide in 2024, with a market share of more than 40–50%, and BYD became the second-largest EV battery manufacturer [S6][S7]. SNE Research tracking for Q1 2026 put the three Korean players (LGES, SK On, Samsung SDI) at a combined 15.6% of global EV-battery usage, down 2.1 percentage points year on year [S8].
Chinese suppliers absorbed the share the Koreans lost, aided by vertical integration that pushed LFP cell pricing below USD 53/kWh in spot transactions during 2024-2025 [S1]. Average lithium-ion pack prices reached USD 108/kWh in December 2025, a 22% drop versus 2023, the steepest annual decline in the chemistries mainstream automakers now use [S1]. For pack specifiers, the practical consequence is that cell-source decisions in 2026 are dominated by three questions: LFP versus NCM chemistry, prismatic versus cylindrical versus pouch form factor, and direct cell supply versus module-level integration.
Chemistry split: LFP versus NCM in 2026 EV packs
By raw material, cobalt led the 2025 mix at 28.5%, with lithium close behind at 27.3% [S2]. These ratios are direct consequences of the LFP-versus-NCM split, since LFP cells eliminate cobalt from the cathode and use iron-phosphate as the active material.
Chinese OEMs shifted mainstream models to LFP through 2025, with Tesla sourcing LFP for more than half of Model 3 and Model Y builds, and Ford targeting late-2026 LFP adoption for the Mustang Mach-E [S1]. The cost gap is the driver: spot LFP prices in China dipped under USD 53/kWh in Q2 2024, undercutting Western producers that lack comparable scale or subsidies [S1]. NCM and nickel-rich chemistries remain the default for premium long-range BEVs and most Korean-made packs, while LFP now anchors mass-market BEVs, commercial vehicles, and BESS modules above 15 kWh [S1][S2].
Form factor: prismatic leads, cylindrical holds premium BEV
Prismatic cells took 44.5% of the 2025 EV-battery form-factor mix, ahead of pouch and cylindrical formats, mainly on the strength of Chinese LFP adoption and CTP/CTC pack architectures [S2]. Cylindrical cells (18650, 21700, and the newer 46xx format) remain the choice for premium Western BEV programs and for most battery energy storage system (BESS) integrators, where mechanical tolerance and proven high-volume production matter more than pack-level energy density [S5].
Prismatic LFP cells in the 100-314 Ah class (EVE LF105, MB31, LF304, BYD Blade-style) dominated 2025-2026 EU warehouse listings, alongside module-and-pack assemblies in the 12-48 V range for stationary storage [S5]. Cylindrical NCM cells at 18650 and 21700 (3.6-3.7 V nominal, 2550-5000 mAh) covered the premium BEV and power-tool segments [S5]. For pack engineers, the selection rule is straightforward: pick prismatic LFP for cost-sensitive CTP/CTC packs and BESS, cylindrical NCM for high-power premium BEV applications, and reserve pouch NCM for space-constrained hybrid modules.
Capacity band: 15-50 kWh is the mainstream 2026 BEV pack
IEA data cited in the same report put global electric car sales above 20 million units in 2025, up 20% year on year, and EV-battery deployment at 1.2 TWh, almost 30% above 2024 and more than seven times the 2020 level [S2].
Global lithium-ion cell nameplate capacity passed 4 TWh by the end of 2025, up roughly 30% year on year, with China controlling more than 80% of that capacity and the EU and US each holding only 6-7% [S2]. The capacity gap is widening, not narrowing, despite the European Commission's EUR 1.8 billion Battery Booster (EUR 1.5 billion in interest-free loans) announced in December 2025 [S2]. For sourcing teams, the implication is that 15-50 kWh pack BOM remains anchored to Chinese cell supply, with Korean and Japanese cell makers as secondary sources for NCM-heavy premium SKUs.
Regional and standard framework: APAC leads, IEC and UN govern shipping
Asia-Pacific contributed 47.0% of 2025 battery-market revenue, supported by China's 1,800 GWh of installed capacity and India's policy push to reach 500 GWh by 2030 [S1]. North America took 35.6% of the EV-battery market in 2025 by revenue, reflecting US Inflation Reduction Act-driven cell localization [S2]. Secondary rechargeable chemistries supplied 90.6% of global battery demand in 2025, with automotive and utility-scale applications absorbing more than 60% of lithium-ion cell output [S1].
Pack shipping and stationary installation are governed by UN 38.3 (transport test), UN 3536 (lithium batteries packed with equipment or contained in equipment), IEC 62619 (secondary lithium cells for industrial applications), and IEC 63056 (secondary lithium cells for stationary energy storage), alongside regional rules such as UL 1973 and UL 9540 in the US and CE/UN approvals for EU-bound BESS modules [S1][S2]. For 2026 BESS procurement from Chinese cell suppliers, UN 3536 compliance and a clear Class 9 dangerous-goods declaration are the baseline checks, as detailed in the spec map for China-sourced BESS [S1][S2]. Sourcing teams should require cell-level UN 38.3 test summaries, IEC 62619 reports for industrial packs, and IEC 63056 for stationary storage before signing POs.
Selection criteria: matching cell maker to pack application
CATL and BYD are the default choices for cost-sensitive LFP packs in the 15-50 kWh BEV band and for utility-scale BESS modules, where vertical integration and spot prices under USD 53/kWh translate directly into lower pack BOM [S1][S5]. LG Energy Solution, Panasonic, and Samsung SDI remain preferred for premium NCM BEV programs that need high specific energy and established global warranty networks, accepting the 2.1 percentage point share loss seen in Q1 2026 as a manageable cost of staying in the premium segment [S1][S8].
For OEM and BESS procurement, the decision matrix in 2026 reduces to four weighted criteria: cell chemistry (LFP for cost/cycle life, NCM for energy density), form factor (prismatic for CTP/CTC, cylindrical for high-power and proven quality systems), supply-chain concentration risk (Chinese cell dependence versus Korean/Japanese diversification), and shipping compliance (UN 3536 for BESS, UN 38.3 for transport, IEC 62619/63056 for stationary approvals) [S1][S2][S5]. Procurement teams should map each candidate cell SKU against these four axes before locking the cell supplier. For context on adjacent power-generation capacity, see the 2026 nuclear OEM market map, which shows how regional capacity build-out parallels the battery localization drive [S1][S2].
Trackable signals to watch through the rest of 2026: SNE Research's Q2 2026 global EV-battery usage share release, which will confirm whether the Korean trio's 15.6% combined figure stabilises or drops further, and any EU Battery Booster loan disbursement announcements that shift European cell capacity from the 6-7% baseline [S2][S8].
Spec-level background on the components involved: pressure transmitter, flow meter, and industrial valve.