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In-Situ Expansion Testing Machine for Lithium-Ion Batteries - Leading China Suppliers & Factory Solutions
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In-Situ Expansion Testing Machine for Lithium-Ion Batteries - Leading China Suppliers & Factory Solutions

The in-situ expansion testing machine, also known as the in-situ expansion analysis system, is an essential piece of equipment for new energy battery research and development in China. This advanced technology is specifically designed to monitor real-time changes in thickness expansion and expansion force of lithium-ion batteries throughout their charging and discharging cycles, all while ensuring non-destructive testing. As a leading factory among battery equipment suppliers, we are committed to providing innovative solutions that enhance the performance and safety of lithium-ion batteries in the rapidly evolving energy sector
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    Product Detail

    Technical Specifications

    Product name

    In-situ expansion analysis system

    Model

    TA-WXHYL-1000kg

    Pressure Adjustment Range

    10kg~1000kg

    Pressure Adjustment Accuracy

    ≤±0.3%FSR

    Structural Mode

    Vertical type: Servo motor screw drive structure

    Test Chamber

    1. Inner box dimensions W600 x D600 x H600 mm

    2. Compression plate: W300*D400mm

    3. Temperature control range of the test chamber: -20℃ to +80℃ (adjustable)

    4. Temperature rise rate: ≥ 3℃/min (without load)

    5. Cooling rate: ≥ 1℃/min (without load)

    6. Temperature fluctuation: 0.5℃

    7. Temperature uniformity: ±2℃

    8. Temperature deviation: ±2℃ (without load)

    9. Insulation layer insulation material: Rock wool (flame retardant; high temperature resistant)

    10. Inner box material: SUS304 stainless steel t=2.0mm

    11. Pressure relief port: There is a pressure relief port on the left side of the equipment. Size: ≥ W200*H200mm. The pressure of the battery explosion shock wave ≥ 0.104MPa will automatically open.

    12. Test hole: The hole on the right side has a diameter of Ø100mm, equipped with a silicone plug. It can be opened when the battery explodes and can also be used as a pressure relief port. It is equipped with a chain to prevent it from flying out and injuring people.

    Displacement Thickness Sensor

    1. The servo motor comes with an encoder that can detect displacement and thickness.

    2. An external micron-level displacement sensor is used to detect displacement and thickness.

    Test trip

    0～90mm

    Thickness measurement resolution

    0.001mm
    Technological Excellence
    A Two Core Testing Modes
    • Constant Pressure Mode: Monitors the thickness change of the battery at a constant pressure, simulating the actual force conditions of the battery cell
    • Constant Gap Mode: Monitors the expansion force change at a fixed thickness, evaluating the structural stress on the module/shell
    B Ultra-high Measurement Accuracy
    • The displacement resolution reaches 0.1μm, accurately capturing minute phase change expansion
    • High-precision pressure sensor ensures real-time accuracy of mechanical data
    C Integrated Analysis Software
    • Synchronously collects six-dimensional data including voltage, current, capacity, thickness, pressure, and temperature
    • Automatically generates professional analysis charts such as thickness-capacity, expansion force-SOC, and dQ/dV correlations
    Applications
    • Development of silicon-based anode
    • Research and development of solid-state batteries
    • Optimization of BMS strategy
    • Evaluation of battery cell structure
    In-situ expansion testing - testing-4In-situ expansion testing - testing-1-1In-situ expansion analysis system applicationIn-situ expansion analysis system application 2
    Scientific Data Insights
    • 1
      Irreversible expansion analysis: Compare the thickness changes in the first week and during the long cycle, to assess the irreversible volume expansion caused by the SEI film and side reactions
    • 2
      Phase transition feature extraction: Determine the phase transition stages of the material at different SOC levels by analyzing the slope changes of the expansion curve
    • 3
      Mechanical modulus assessment: Test the mechanical modulus of the battery under various charging and discharging states to provide data support for mechanical simulation
    FAQ
    The off-site test can only observe the final results, while the in-situ test can capture in real time the pulverization points and nonlinear expansion processes of silicon particles during their lithium extraction. With the Taiantest in-situ system, researchers can accurately determine the failure points of electrolyte additives within the corresponding voltage range.
    If you are studying the inherent physical properties of the materials, it is recommended to use the constant pressure mode; if you are verifying the module structure design or the strength of the PACK shell, the constant gap mode can more accurately simulate the expansion force and damage of the battery in a sealed space.
    By using an extremely low temperature drift displacement sensor combined with a highly rigid frame, the measurement errors caused by thermal expansion and contraction of the equipment as well as mechanical fatigue can be effectively eliminated. The system supports 24/7 uninterrupted operation and has a power outage data protection function.
    The system is compatible with a wide range of battery formats, including pouch cells, prismatic cells, and cylindrical cells. It is suitable for lithium-ion batteries, solid-state batteries, and next-generation silicon-anode battery research, supporting various cell sizes within the inner box dimensions of W600 x D600 x H600 mm.
    The system is equipped with multiple safety mechanisms, including an automatic pressure relief port (≥ W200*H200mm) that opens when the battery explosion shock wave pressure reaches ≥ 0.104MPa, and a test hole on the right side (Ø100mm) fitted with a silicone plug and a chain to prevent it from being ejected. The inner box is made of SUS304 stainless steel with rock wool flame-retardant insulation, ensuring comprehensive protection during extreme battery events.
    Yes, the integrated analysis software is designed for open compatibility. It can synchronously collect six-dimensional data — including voltage, current, capacity, thickness, pressure, and temperature — and supports data export in standard formats. The system can be coordinated with mainstream battery cyclers to achieve fully synchronized electrochemical and mechanical measurements within a single test session.

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