Automatic Winding and Unwinding Device for Battery Electrode Roll Processing

Automatic Winding and Unwinding Device for Battery Electrode

Product Overview

The TOB-FSJ450CY automatic winding and unwinding device is a precision roll-to-roll handling system designed for rewinding and slitting of electrode and film materials. It integrates an independent control system to enable synchronized automatic unwinding and rewinding with stable tension control.

Built for lithium-ion battery electrode processing, this winding and unwinding device also supports optical films and functional film materials where uniform tension and alignment directly impact downstream coating, calendaring, and cell performance. It addresses common issues such as uneven winding, edge misalignment, and tension fluctuation that lead to scrap or inconsistent electrochemical results.

Developed based on TOB NEW ENERGY’s 24 years of battery engineering experience, the system is validated within in-house electrode processing lines and integrates seamlessly into full battery R&D and pilot production workflows. The result is stable roll quality with controlled tension and repeatable handling performance.

Key Advantages

This automatic electrode winding and unwinding device is engineered for controlled roll handling in battery electrode manufacturing, where tension stability and alignment directly affect coating uniformity and final cell performance.

● Servo-driven tension control (0–50N) – ensures stable web handling, reduces material deformation, validated through electrode processing tests in TOB’s pilot lines
● ±0.5 mm rewinding accuracy – improves roll edge alignment and downstream coating consistency, critical for lithium-ion and sodium-ion electrodes
● Automatic web guiding (EPC system) – maintains precise alignment during unwinding and rewinding, minimizing edge defects and scrap
● Floating roller buffer system – stabilizes web tension during continuous operation, reducing vibration and improving roll quality
● Servo-driven traction system – delivers consistent line speed control (up to 10 m/min), ensuring repeatable process conditions

Send Your Roll Material Specs and Process Requirements — Get a Matched Winding Solution

Technical Specifications

Specification Interpretation & Application

Tension control (0–50 N) is critical for handling thin electrode coatings and sensitive separators, especially in high-nickel cathode and sodium-ion systems where mechanical stress can alter microstructure. The ±0.5 mm rewinding accuracy ensures consistent roll edges, directly impacting coating uniformity in upstream processes such as Electrode Coating Machine.

The servo-driven traction and EPC system allow stable operation at up to 10 m/min, suitable for lab-scale and pilot-scale roll preparation. The floating roller buffer reduces transient tension fluctuations, which is essential when processing multi-layer coated electrodes or composite films.

This system is compatible with lithium-ion, solid-state electrode sheets, and functional films, and can be integrated with upstream coating systems like Electrode Coating Machine and downstream processes such as electrode Calendering Machine for continuous process validation.

Applications and Solution

This winding and unwinding device is used in roll handling stages where tension control and alignment directly affect material quality.

● Battery R&D Laboratories
Problem: Inconsistent manual rewinding leads to edge defects and data variability
Solution: Automated tension control ensures repeatable electrode roll preparation for coin, pouch, and cylindrical cells

● Electrode Material Developers

Problem: Thin coatings deform under unstable tension
Solution: Servo-controlled winding preserves coating integrity for high-energy-density materials

● Pilot-Scale Battery Production

Problem: Transition from lab sheets to roll processing introduces instability
Solution: Continuous operation and EPC alignment support stable roll-to-roll validation

● Film and Functional Material Processing

Problem: Optical and functional films require precise alignment and low tension variation
Solution: Floating roller and servo traction ensure smooth handling without wrinkles or deviation

Integrated within TOB NEW ENERGY’s full workflow—from material mixing to coating and calendering—this device ensures consistent roll quality across R&D and pilot production stages.

Side view of the electrode rewinding equipment	Top view of the electrode rewinding equipment

Not Sure If Your Electrode or Film Requires This Configuration? Submit Your Process Details and Get Direct Input from a Battery Process Engineer

Quality & Support

Manufactured under ISO 9001 and IATF 16949 quality systems, this winding and unwinding device meets CE and UL compliance standards. All systems are built and tested within TOB NEW ENERGY’s in-house R&D and pilot facilities, ensuring alignment with real battery production conditions.

Each unit includes a one-year standard warranty with optional extended service plans. With experience supporting over 6,000 global customers, TOB provides rapid technical response, spare parts availability, and remote or on-site service.

Process support is provided by a PhD-led engineering team with over 20 years of battery industry experience, offering guidance on equipment selection, tension configuration, and integration into full production workflows.

Frequently Asked Questions

Q1: Can this winding and unwinding device handle thin lithium-ion electrode coatings?
Yes. The servo-controlled tension system (0–50 N) allows precise adjustment for thin coatings, preventing deformation or cracking. Based on our 24 years of battery equipment engineering, stable tension control is essential for high-nickel cathodes and advanced materials.

Q2: How does the automatic web guiding system improve roll quality?
The photoelectric EPC system continuously corrects alignment during operation, ensuring uniform edges and reducing material waste. This is particularly important for downstream coating and slitting processes.

Trusted by Global Innovators

TOB NEW ENERGY’s roll-to-roll handling equipment is deployed in battery laboratories, pilot lines, and material development centers worldwide. Our systems support electrode preparation for lithium-ion, solid-state, and sodium-ion batteries across universities, start-ups, and large-scale manufacturers.

Backed by 60+ patents, USD 20 million in R&D investment, and a 3,000+ m² testing center, TOB equipment is validated in real battery production environments—not just mechanical assembly.

Need stable, repeatable roll handling for your electrode process? Submit your material and process specs to receive a matched configuration.