Porsche has launched a dedicated battery module production facility in Horná Streda, Slovakia, for the upcoming Cayenne Electric. The plant, called the Porsche Smart Battery Shop, represents the automaker’s push to develop and manufacture high-voltage batteries entirely in-house across its European operations.
Highlights
- Porsche’s 40,200-square-meter Smart Battery Shop in Slovakia produces battery modules for the Cayenne Electric using 32 pouch cells per module
- Six modules combine to form the Cayenne Electric’s complete high-voltage battery pack
- The facility produced its first finished module in May 2024, roughly 16 months after construction began
- Porsche also expanded its battery operations through the March 2025 acquisition of VARTA AG’s V4Drive unit, now renamed V4Smart GmbH
Facility and Timeline
The Smart Battery Shop sits adjacent to Porsche Werkzeugbau’s existing Technology Center, about an hour from Bratislava. Construction began in January 2023. Equipment installation started that September. Collaboration between Porsche’s technical development team in Weissach and production planning in Zuffenhausen enabled a rapid build-out.
Porsche Werkzeugbau’s prior prototype experience transferred directly into series production at the new facility. The plant is operated by Porsche Smart Battery Shop s.r.o., a subsidiary founded in 2022.
Module Production Process
Each battery module is assembled through a multi-stage process under strict electrostatic discharge (ESD) and cleanliness protocols:
- Cell preparation: Pouch cells are tested and staged for assembly
- Stack formation: Cells are layered with precise spacing and electrode alignment
- Laser welding: Automated welding joins cell tabs for electrical and mechanical bonding
- Module integration: Four tested cell stacks are placed into a module housing
- Gap filling: Thermally conductive material is added between cells to improve heat dissipation
- Cooling plate bonding: The housing is bonded to cooling plates for thermal management
- Top plate welding: A welded top plate seals the module assembly
- End-of-line testing: Leak tests, electrical checks, dimensional inspections, and insulation measurements verify each module
Quality Control and Validation
The facility uses real-time process data acquisition across every production stage. All quality data is archived in the cloud, providing full traceability for each module over time.
Porsche also validates battery performance for longevity and charging capability in its own analysis center. Testing includes heat exposure simulations between 60 and 100 degrees Celsius and immersion testing. After module production, a supplier adds high-voltage cabling and connectors before modules ship just-in-sequence to the Bratislava assembly plant.
V4Smart Acquisition Expands Battery Portfolio
Porsche AG acquired V4Drive GmbH from the VARTA AG Group in March 2025 and renamed it V4Smart GmbH. The Porsche Werkzeugbau Group led the expansion of battery production at the Nördlingen site. V4Smart cells serve as booster cells in the 911 Carrera GTS and 911 Turbo S.
Sustainability Measures
The Smart Battery Shop incorporates photovoltaic panels and heat pumps for energy supply. The facility’s roof surfaces are greened, and the site operates its own well for water supply.
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