Extended Four Wire CNC Aluminum Battery Test Fixture Holder Dual Self Locking 60A

Product Overview

This high-precision battery test fixture provides a rugged, low-resistance platform for electrochemical characterization, high-rate charge-discharge cycling, and quality assurance testing of cylindrical energy storage cells. Engineered from premium CNC-machined aluminum alloy, the fixture incorporates a true four-wire Kelvin connection architecture to eliminate lead and contact resistance, ensuring that voltage drop measurements reflect only the internal impedance of the device under test. Designed specifically to handle continuous high-current loads up to 60A, this fixture delivers stable electrical and thermal performance across prolonged testing cycles.

Featuring an innovative dual self-locking mechanism, the equipment completely removes the need for manual screw fastening or mechanical tools during cell loading and unloading. The integrated front-to-back and top-to-bottom locking slide system firmly secures cylindrical cells in place within seconds, exerting uniform contact pressure across positive and negative terminals without deforming fragile can walls or damaging terminal caps. This rapid clamping design dramatically reduces operator handling time during high-throughput battery qualification and formation workflows across pilot production lines, academic laboratories, and industrial R&D facilities.

Available in both standard and extended configurations, the holder accommodates a comprehensive range of cylindrical formats—from standard commercial lithium-ion cells to specialized large-format and ultra-long industrial cells up to 118mm in length. With a lightweight yet rigid 200g aluminum chassis, optimized contact geometry, and superior dimensional tolerances, this fixture guarantees repeatable, drift-free electrical contact under rigorous cycling regimes, making it an indispensable asset for precision battery engineering and materials characterization.

Key Features

• True Four-Wire Kelvin Sensing Architecture: Incorporates isolated current excitation and voltage sense paths directly at the terminal contact points, effectively eliminating fixture wiring resistance and contact impedance for ultra-accurate DC internal resistance (DCIR) and electrochemical impedance spectroscopy (EIS) measurements.
• Heavy-Duty 60A Current Carrying Capacity: Heavy-duty current-carrying contacts and an electrically optimized conductor cross-section allow continuous operation up to 60A with minimal resistive heating, preventing thermal drift during aggressive high-rate pulse discharge and fast-charging trials.
• Tool-Free Dual Self-Locking Mechanism: Features a multi-axis sliding carriage with front-and-rear and up-and-down self-locking geometry, allowing instant, secure cell clamping and release with smooth manual engagement and zero set-screws.
• Precision CNC Aluminum Alloy Construction: Milled from structural-grade aluminum alloy on multi-axis CNC machining centers, providing exceptional structural rigidity, superior wear resistance, and natural heat sinking capabilities compared to conventional 3D-printed or molded plastic brackets.
• Extended Format Compatibility: Engineered to accept diverse cylindrical cell form factors, offering support for cells with diameters up to 35mm (including D-size / No. 1 cells) and lengths up to 118mm in the extended variant, spanning 18650, 21700, 26650, 32650, 32140, 4680, and custom industrial prototypes.
• Uniform Terminal Contact Pressure: High-durability spring-loaded contact pins ensure consistent mechanical force against both flat and button-top cell terminals, mitigating variable contact resistance between consecutive test runs and across different operators.
• Compact and Lightweight Form Factor: Weighing approximately 200g, the unit maximizes bench space efficiency and fits seamlessly inside multi-channel battery testing cabinets, environmental temperature chambers, and glove boxes.

Applications

Technical Specifications

Why Choose This Product

• Superior Contact Integrity at High Currents: Engineered specifically to resolve the overheating and voltage-drop inaccuracies inherent in generic test holders, this system delivers an uncompromised 60A continuous rating backed by rigid Kelvin contact routing.
• Unmatched Operational Efficiency: The dual self-locking slide architecture eliminates tedious thumbscrews and hex wrenches, cutting cell loading and unloading time by over 70% and boosting productivity in high-volume testing schedules.
• Precision CNC Machining & Durability: Unlike standard additive-manufactured or thin-sheet brackets, the solid anodized aluminum body ensures superior dimensional tolerance, resistance to mechanical wear, and excellent structural stability through thousands of clamping cycles.
• Broad Format Flexibility: With extended length capability up to 118mm and diameter support up to 35mm, the fixture seamlessly adapts to existing legacy cells as well as emerging next-generation supercells and industrial energy formats.
• Direct Engineering Support and Customization: Backed by dedicated technical specialists who understand electrochemical workflows, providing dependable integration support for automated test racks, climate chambers, and custom battery analyzers.

Contact our technical sales team today to request a quote, discuss multi-channel configurations, or identify the optimal fixture model for your battery testing setup.

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