Forced Internal Short Circuit Tester - China Suppliers & Factory for Battery Safety Testing Against Thermal Runaway Risks

Although all types of tests simulate battery short circuits, the FISC mandatory internal short circuit test (in accordance with JIS C 8714 and IEC 62133) has the highest accuracy and is the closest to the real manufacturing defect scenarios.

Conventional compression/needle puncture: This belongs to external severe damage, simulating severe deformation caused by external force impact.

FISC: This simulates spontaneous internal short circuits caused by the introduction of metal impurities (such as nickel chips) during production. It requires slowly applying pressure to the preset nickel sheet position in a temperature-controlled environment, with extremely high requirements for pressure control accuracy (0.1N level) and voltage drop detection sensitivity.

According to the JIS C 8714 standard, the equipment needs to monitor voltage changes in real time. The testing equipment is equipped with a high-frequency data acquisition system:

Automatic shutdown trigger: When the battery voltage drops (typically 50mV), the servo motor is controlled to stop applying pressure and maintain pressure within milliseconds.

Dual judgment logic: It can simultaneously use pressure compliance (such as 800N) or displacement compliance as the shutdown conditions.

The high sensitivity control can avoid excessive pressure causing an external short circuit, accurately reproducing the instant when an internal short circuit occurs.

This is precisely where the core difference lies between professional equipment and low-end equipment:

Precise servo control: Utilizing high-precision AC servo motors and precise ball screws, it can achieve ultra-smooth operation at speeds as low as 0.1mm/s, eliminating the common crawling and jitter problems in hydraulic systems.

High-precision load sensors: Pressure fluctuations are controlled within ±0.5%, fully meeting the strict requirements of standards for pressure application rate and pressure accuracy throughout the process.

The tester supports a wide range of lithium battery form factors, including cylindrical cells, prismatic (square) cells, and pouch-type cells. The customized fixture set includes extrusion heads of varying sizes and materials (such as Nitrile rubber pads and Acrylic sheets) to accommodate different cell geometries and ensure consistent pressure application across all formats.

Yes. The software supports one-click export of PDF and Excel test reports formatted in accordance with IEC/JIS standards. The system also supports remote real-time data viewing, making it straightforward to archive results or integrate them into existing laboratory information management systems (LIMS) or quality management platforms.

The equipment incorporates multiple layers of protection: an explosion-proof steel box body with reinforced observation windows contains any sudden cell failure; a smoke detector-linked automatic exhaust system rapidly vents gases in the event of thermal runaway; reserved nitrogen/CO₂ fire extinguishing ports allow immediate suppression; and a dedicated pressure relief door prevents dangerous overpressure build-up inside the chamber — together providing comprehensive operator and facility protection.