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A Third Pillar for VW's Battery Strategy
According to an exclusive report by South Korean industry publication The Elec, Samsung SDI has secured a major order to produce Volkswagen's Unified Cell — the standardised prismatic battery format that underpins the Group's next wave of affordable electric vehicles. Neither Volkswagen nor Samsung SDI has confirmed the deal, though a Samsung SDI representative acknowledged that "some line conversion work is underway" at the Hungarian plant while declining to name the customer.
The Unified Cell, measuring 256 × 24.8 × 106 millimetres, was first unveiled by then-CEO Herbert Diess during VW's 2021 Power Day. Its defining feature is a side-terminal design — a departure from the conventional top-terminal layout — that enables more compact battery pack integration across different vehicle segments. The format is chemistry-agnostic: it can be filled with LFP for entry-level cars, high-nickel NCM for premium models, or even future solid-state cells.
Until now, the Unified Cell has been produced at just two locations: VW's own PowerCo plant in Salzgitter, Germany, which began series production in late 2025 with a 20 GWh annual capacity, and the factory of VW's Chinese partner Gotion High-Tech in Hefei, which started deliveries in November 2025. Samsung SDI would become a strategically important third supplier — and crucially, the first third-party producer on European soil.
Hungary: Europe's Battery Powerhouse
Samsung SDI's plant in Göd, roughly 30 kilometres north of Budapest, sits at the centre of an expanding European battery empire. The factory already supplies prismatic cells to Audi and Porsche for models including the Q8 e-tron, Q6 e-tron, and the electric Macan. It also produces BMW's 46-millimetre cylindrical cells and prismatic batteries for Mercedes-Benz and Hyundai.
The retrofit concerns two existing production lines that will be converted from top-terminal to side-terminal cell architecture — a non-trivial engineering effort that reportedly involves equipment already being installed on one line, with the second being prepared in South Korea. Industry sources cited by The Elec estimate output capacity in the double-digit gigawatt-hour range, sufficient for several hundred thousand vehicles annually.
This expansion dovetails with Samsung SDI's broader European strategy. Having effectively pivoted its US joint venture with Stellantis toward energy storage, the company is doubling down on EV battery production in Europe. During its Q1 2026 earnings call, Samsung SDI projected over 10% growth in European EV battery demand this year and said it expects the Hungarian plant's utilisation rate to climb above 70% in the second half.
Why Now: Politics, Production, and the MEB21 Platform
Timing is everything. Just one day before the report broke, Volkswagen launched series production of the ID. Polo and Cupra Raval in Martorell, Spain — the first models built on the upgraded MEB21 (MEB-Small) platform, which uses side-terminal Unified Cells. A Škoda Epiq and VW ID. Cross will follow from the Navarra plant. Together, these compact EVs represent VW's most important volume push since the original ID.3.
The regulatory backdrop is equally compelling. In March 2026, the European Commission unveiled the Industrial Accelerator Act, which ties public procurement and subsidies to "Made in EU" requirements. For EV batteries, this means that from the third year of the law's implementation, battery cells and cathode active materials must originate within the EU to qualify. Korean manufacturers — which already account for over 80% of EU battery cell production capacity — are uniquely positioned to benefit.
CATL is also understood to have secured Unified Cell orders, though no official production announcement has been made. Samsung SDI, with an established European factory footprint and existing VW Group relationships dating back to 2018, holds a distinct time-to-market advantage.
What This Means for European EV Buyers
For consumers, the addition of a third Unified Cell supplier should translate into more resilient supply chains and — potentially — faster cost reductions for the affordable EVs Europe desperately needs. The ID. Polo and Cupra Raval represent VW's answer to the sub-€25,000 electric car question, and battery cost is the single largest factor in reaching that price point.
Volkswagen's Q1 2026 figures underline the stakes: while global EV deliveries slipped 7.7% year-on-year to 200,000 units — dragged down by an 80% collapse in the US and a 64% drop in China — European sales rose 12% to 176,400 units. Europe is not just VW's home market; it is now the only major region where its electric business is growing.
If Samsung SDI's Göd lines come online on schedule in 2027, they will arrive just as the MEB21 family scales up across Spain and the wider Group. That alignment — a European-made cell for a European-made car — is exactly the kind of supply chain logic Brussels is now writing into law.
What is Volkswagen's Unified Cell and why does it matter?
The Unified Cell is a standardised prismatic battery format (256 × 24.8 × 106 mm) designed to be used across 80% of Volkswagen Group's electric vehicles by 2030. It uses a side-terminal design for more compact pack integration and can accept different chemistries — LFP, NCM, or solid-state — making it adaptable to everything from small city cars to Porsche sports cars. The standardisation drives down costs through economies of scale.
Which Volkswagen models will use Samsung SDI batteries?
Samsung SDI already supplies prismatic cells for Audi and Porsche models including the Q8 e-tron, Q6 e-tron, and electric Macan. The new Unified Cell deal would expand supply to VW's volume brands — Volkswagen, Škoda, and Seat/Cupra — specifically the compact EVs on the MEB21 platform such as the ID. Polo, Cupra Raval, Škoda Epiq, and VW ID. Cross.
How does the EU Industrial Accelerator Act affect battery production?
The Act, proposed in March 2026, requires that EVs and their components — including battery cells and cathode active materials — meet "Made in EU" criteria to qualify for public procurement and subsidies, with a phased implementation starting three years after the law takes effect. This incentivises automakers to source cells from European-based factories, benefiting manufacturers like Samsung SDI that already operate production facilities within the EU.
Source: https://www.electrive.com/2026/06/04/samsung-sdi-reportedly-to-supply-battery-cells-to-volkswagen/