Battery Electrode Bend Tester Cylindrical Mandrel Flexibility and Coating Adhesion Testing System

Product Overview

This cylindrical mandrel bend testing instrument delivers accurate, repeatable characterization of coating flexibility, ductility, and substrate adhesion for battery electrodes and coated metal foils. By wrapping coated test specimens over precision-machined cylindrical mandrels of known diameters, the apparatus allows engineers to determine critical mechanical failure thresholds, including micro-cracking, flaking, and film delamination under tensile deformation.

Engineered primarily for lithium-ion battery electrode formulation, pilot-scale coating verification, and advanced surface engineering laboratories, this benchtop tester serves as a vital quality control and R&D tool. It reliably accommodates metallic current collectors, polymeric separators, conversion coatings, and specialized thin films, giving researchers exact empirical metrics for evaluating binder elasticity and active material adhesion.

Built from high-grade structural alloys with strict manufacturing tolerances, the equipment delivers unwavering mechanical consistency over tens of thousands of test cycles. Its smooth, controlled bending motion eliminates operator-induced variability, making it an essential asset for battery manufacturing facilities and academic research centers demanding certified compliance and rigorous physical testing protocols.

Key Features

• Comprehensive Twelve-Piece Mandrel Suite: Equipped with a full range of precision-ground cylindrical rods (2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, and 32 mm) to accurately determine the exact elongation and failure limits of diverse active material coatings.
• Precision Clearance Engineering: Engineered with an ultra-tight 0.05 mm clearance tolerance between the rotating arm and test mandrel, alongside a 0.1 mm support bracket tolerance, guaranteeing true radial conformance during testing without unwanted slippage.
• High-Stroke Clamping Architecture: Features a vertical support lift and handle travel exceeding 17 mm, allowing smooth loading, exact clamping, and secure retention of varied substrate thicknesses up to 1.0 mm.
• Ergonomic 180-Degree Bending Mechanism: Features a counterbalanced rotary handle designed to execute uniform 180° specimen bends smoothly within a standard 1-to-2 second testing window, preventing localized stress spikes.
• Rigid Heavy-Duty Frame: Built with a reinforced cast-metal base and wear-resistant guide columns to ensure zero chassis deflection during tight-radius deformation of stiff metallic substrates.
• Non-Destructive Specimen Clamping System: Integrates precision knurled thumb screws and protective clamping strips that securely hold delicate electrode foils without damaging the active coating prior to deformation.
• Rapid Tool-Free Mandrel Replacement: Utilizes an intuitive threaded retaining nut mechanism that enables operators to switch between mandrel diameters in seconds during iterative step-down failure testing.
• Strict Metrological Conformity: Designed to meet stringent standardized cylindrical bend test protocols under controlled ambient laboratory conditions (23 ± 2°C and 50 ± 5% RH).

Applications

Technical Specifications

Why Choose This Product

• Precision Metrological Engineering: Every mandrel rod in this instrument is machined to exacting concentricity and ground to a micro-smooth surface finish, eliminating micro-abrasions and ensuring uniform stress distribution across sensitive electrode foils.
• Repeatable Step-Down Failure Analysis: The full 12-diameter mandrel set allows operators to precisely identify the first-failure diameter threshold, providing quantitative, standardized data for coating optimization.
• Operator-Independent Mechanics: The rigid dual-linkage mechanism, combined with ultra-tight assembly clearances, guarantees that every bend is performed consistently at a true 180-degree sweep without axial deviation or lateral rocking.
• Robust Benchtop Construction: Engineered with hardened steel components and corrosion-resistant coatings, the unit withstands continuous daily use in high-throughput industrial battery manufacturing and rigorous testing labs.
• Complete Workflow Compatibility: Seamlessly integrates into battery electrode R&D lines, complementing slurry coaters, roll presses, and adhesion peel testers to establish a complete mechanical verification standard.

Contact our technical sales team today to request a quotation or discuss how this precision testing solution can enhance your laboratory's battery electrode quality assurance workflow.

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