Development and production of lithium-ion electrodes and battery cells to customer formulation at the Flintbek gigafactory near Kiel.
UniverCell Holding GmbH
Flintbek (headquarters/gigafactory) · Moorsee (production) · RusseeNew on Amplifa
About UniverCell
UniverCell is an electrode and battery cell manufacturer based in Flintbek near Kiel that develops and produces lithium-ion electrodes and cells according to customer-specific formulations. The company operates a gigafactory with an available capacity of 1.5 GWh and an electrode coating system that produces up to 64,000 m² of electrodes per day – with coating speeds of up to 60 m/min, a maximum coating width of 750 mm and an 80 m long dryer with 12 zones. The portfolio includes custom-made electrode foils (anode and cathode), pouch cells in the 80 x 390 x 25 mm format, 21700 cylindrical cells in tabless design as well as button and prototype cells. UniverCell supports customers from laboratory scale through piloting to series production and operates its own formation and testing center for performance, cycle life and safety. The products are used in applications such as power tools, e-mobility, e-aviation, aerospace and medical technology.
- Site
- Flintbek
- Processes
- Electrode coating (anode/cathode, continuous and intermittent, single- and double-sided), Pouch cell production (stacking, ultrasonic welding, deep drawing/sealing,, Button cell and prototype cell manufacturing (proof of concept), 21700 cylindrical cell production (tabless design, dry electrode coating), Calendering of electrodes (up to 120 m/min, heated rollers), Cell development from prototype to series production including formation and testing center, Mixing of electrode slurries (state-of-the-art mixing processes, extruders), Electrode coating according to customer-specific formulations (up to 60 m/min, 750 mm width)
- Materials
- Graphite (anode), LTO (lithium titanium oxide), Si/C (silicon-carbon), Copper foil (anode current collector), NCA (nickel-cobalt-aluminium oxide), NMC 811, NMC 9XX, NMC 622
- Certificates
- Member of the Alliance for Cyber Security
- Employees
- 92
- Industries
- Power tools, E-mobility, E-aviation, Aerospace, Medical technology, Energy storage
- 01
Individual consulting and formulation development
- 02
Slurry production (mixing processes, extruders)
- 03
Electrode coating (continuous/intermittent, single- and double-sided)
- 04
Drying (80 m dryer, 12 zones, vacuum drying)
- 05
Calendering
- 06
Cutting anode/cathode
- 07
Cell assembly (stacking, ultrasonic welding, deep drawing/sealing)
- 08
Formation and testing in the test center
- 09
Scaling from prototype to medium series volumes
Materials & Processes
Graphite (anode)
Active material for anode foils according to customer formulation.
Lithium titanium oxide (anode)
Active material for anodes with special application requirements.
Silicon-carbon (anode)
High-capacity active material for anode foils.
Nickel-cobalt-aluminium oxide (cathode)
Cathode active material for high-performance cells.
NMC 811 (cathode)
Nickel-rich cathode material for high energy density.
NMC 9XX (cathode)
Further developed nickel-rich cathode material.
NMC 622 (cathode)
Cathode material among others for pouch cells.
Lithium iron phosphate (cathode)
Cathode active material including nickel-rich LFP variants.
Copper foil (anode current collector)
Substrate for anode coating, substrates down to 6 µm possible.
Aluminium foil (cathode current collector)
Substrate for cathode coating, substrates down to 6 µm possible.
Polypropylene (pouch film/filter system)
Material for pouch packaging and magnetic filter systems.
Sites
Flintbek
DEGigafactory / headquarters: electrode and cell production, laboratory, formation and testing center
- Lot size
- Prototype to medium series volumes
- Materials
- Graphite, LTO, Si/C, NCA, NMC 622/811/9XX, LFP, copper and aluminium foil
- Electrode coating system (up to 60 m/min, 750 mm width, 80 m dryer/12 zones)
- Pilot coater
- Laboratory and pilot calenders (800 mm rollers, up to 120 m/min, heated)
- Vacuum ovens
- Gloveboxes
- Extruders
- Inline basis weight and layer thickness measurement
- Cutting systems anode/cathode
- Ultrasonic welding system for tabs
- Production line for 21700 cylindrical cells (SOP 2025)
- Formation and testing center
Moorsee
DEProduction site (coating system)
- Coating system
Russee
DESite (maintenance/production according to job postings)
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Electrode coating (anode/cathode, continuous and intermittent, single- and double-sided)Surface | – | 750 mm (coating width) | 64,000 m² of electrodes per day | – | Graphite, LTO, Si/C, Copper foil, NCA, NMC 811, NMC 9XX, LFP, Aluminium foil |
| Pouch cell production (stacking, ultrasonic welding, deep drawing/sealing,Joining | – | 390 mm × 80 mm × 25 mm | – | Prototype – medium series volumes | NCA, NMC 622/811, Nickel-rich LFP |
| Button cell and prototype cell manufacturing (proof of concept)Joining | – | – | – | – | NCA, NMC 811, NMC 9XX, LFP, Graphite, LTO, Si/C |
| 21700 cylindrical cell production (tabless design, dry electrode coating)Joining | – | – | – | – | NCA, NMC, LFP |
| Calendering of electrodes (up to 120 m/min, heated rollers)Forming | – | 800 mm (calender rollers) | – | – | – |
| Cell development from prototype to series production including formation and testing centerEngineering | – | – | – | – | – |
| Mixing of electrode slurries (state-of-the-art mixing processes, extruders)Plastics | – | – | – | – | – |
11 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Electrode coating system (world's most flexible coating line) | – | – | Coating speeds up to 60 m/min, max. width 750 mm, dryer 80 m / 12 zones, substrates | – | Flintbek/Moorsee |
| Pilot coater | – | – | – | – | Flintbek |
| Laboratory and pilot calenders (800 mm calender rollers, up to 120 m/min, heated) | – | – | – | – | Flintbek |
| Vacuum oven (dryer 80 m, 12 zones) | – | – | – | – | Flintbek |
| Glovebox | – | – | – | – | Flintbek |
| Extruder | – | – | – | – | Flintbek |
| Inline basis weight determination (wet/dry) and inline layer thickness measurement | – | – | – | – | Flintbek |
| Cutting systems (anode/cathode) | – | – | – | – | Flintbek |
| Ultrasonic welding system for tabs | – | – | – | – | Flintbek |
| Production line for cylindrical 21700 cells | – | – | – | SOP 2025 | Flintbek |
| Formation and testing center | – | – | – | – | Flintbek |
Additional services
Quality
Quality is ensured by inline basis weight determination (wet and dry), inline layer thickness measurement (Samespot measuring technology), camera-monitored defect detection and an in-house formation and testing center in which performance, cycle life and safety are tested. A QA process accompanies production from pilot run to series and at the same time protects customers' intellectual property.
| Evidence | Flintbek |
|---|---|
| Member of the Alliance for Cyber Security |
History
- 2014
Funding of the construction of the Flintbek site through the state economic program (LPW) with GRW funds (2014–2020).
- 2023
21700 cylindrical cells available as prototypes from the end of 2023 according to the product page.
- 2025
Planned SOP of a new production line for cylindrical 21700 cells.
- 2026
Press release of 05.03.2026: UniverCell closes a €30 million investment round to scale battery cell production.