Battery Cell Test Pressure Vessel，battery safety testing pressure chamber"

The Battery Cell Test Pressure Vessel is designed for thermal runaway testing of battery cells in compliance with UL 9540A. The system provides a fully sealed test environment capable of vacuum extraction, nitrogen filling, and measurement of critical parameters including pressure, temperature, and oxygen concentration. The vessel is equipped with interfaces for film heating and overcurrent circuits, allowing flexible customization to meet the specific requirements of battery safety testing.

Application

Battery Energy Storage Systems

Thermal runaway evaluation of commercial battery cells under controlled conditions, in accordance with UL 9540A standards.

Battery Research and Development

Testing of individual battery cells to monitor pressure, temperature, and oxygen concentration changes during abuse conditions.

Battery Certification and Safety Testing

For laboratories performing standardized fire propagation and thermal runaway tests on lithium-ion cells.

Material Testing

Integration with weighing platforms and temperature/voltage monitoring for material degradation analysis.

Standards

The pressure vessel complies with the following standards:

(1) UL 9540A:2025 – Standard for Testing Thermal Runaway Fire Propagation in Battery Energy Storage Systems

(2) PV8450 – Battery Thermal Runaway Test Method

Parameters

Item	Specification
Working Pressure	≥ 3 MPa, equipped with safety valve for automatic pressure relief
Vessel Temperature Resistance	> 1200 °C
View Window	Diameter 5–25 cm
Thomas Sampling Pump	Adjustable manual exhaust, capable of achieving -90 kPa vacuum
Control Cabinet	Standard 19-inch touchscreen, metal frame
Environmental Configuration	External nitrogen achieves oxygen concentration <1%
Backup Gas Source	Nitrogen ≥ 99.99% purity
Power Supply	AC 220 V, 50/60 Hz, 10 A

Features

Customizable Stainless Steel Vessel

Sealed chamber made of 304 stainless steel; test volume and dimensions can be tailored to specific applications.

Multi-Functional Interfaces

Flanged connection plates with specialized fittings allow for temperature, voltage, heating, and overcurrent connections.

Vacuum and Nitrogen Filling Capability

Achieves oxygen concentration below 1% to simulate inert test environments.

Weighing Platform Integration

Optional platform with load sensors enables mass loss monitoring during thermal events.

Safe and Easy Cell Handling

Swing door with locking screws ensures airtight seal; movable metal cell holder allows stable sample placement.

Pressure Monitoring

Customizable range via high-precision sensors to capture vessel internal pressure dynamics.

Multi-Channel Data Acquisition

12 temperature channels (expandable), 2 voltage channels for real-time battery voltage monitoring.

Gas Flow Control

Manual ball valves and solenoid valves protect sensors and prevent gas leakage.

Advanced Control Cabinet

19-inch touchscreen in a metal frame with electrostatic spray coating, high-temperature baking process for durability, easy cleaning, and aesthetic appearance.

Automated Data Monitoring

Siemens PLC and analog modules, integrated with LabVIEW software, monitor temperature, pressure, and oxygen concentration in real time, and store data for later analysis.

Report Generation

Test data can be exported as Excel, Word, or PDF files for documentation and further analysis.

Accessories

(1) Thomas sampling pump

(2) Safety valves and pressure sensors

(3) Temperature and voltage sensor interfaces

(4) Nitrogen filling system

(5) Weighing platform with load sensors

(6) Film heating interface

(7) Overcurrent protection interface

(8) Standard electrical control cabinet with touchscreen and PLC

Test Procedures

Cell Installation: Place battery cells in the vessel on the movable holder and lock the chamber door.

System Preparation: Connect external nitrogen supply and set oxygen concentration below 1% if required.

Parameter Setup: Configure temperature, pressure, and voltage monitoring channels via the touchscreen.

Initiate Test: Activate PLC control system to begin thermal runaway simulation.

Data Monitoring: Record pressure, temperature, oxygen levels, and cell voltage in real time; optional mass loss measurement.

Data Storage and Report Generation: Export all test data and results in Excel, Word, or PDF format.

Post-Test Procedures: Vent the vessel, safely remove battery cells, and inspect the chamber and sensors for next use.

Maintenance Information

Regularly inspect all valves, fittings, and flanged connections for tightness and integrity.

Calibrate temperature and pressure sensors periodically to ensure accurate measurements.

Clean the interior vessel and viewing window to maintain visibility and prevent contamination.

Verify nitrogen supply system and vacuum pump operation before each test.

Backup all test data and system logs to secure storage for traceability and compliance verification.

Conclusion

The Battery Cell Test Pressure Vessel provides a safe, flexible, and fully controlled environment for thermal runaway testing of battery cells. With vacuum, nitrogen, multi-channel temperature and voltage monitoring, and comprehensive data acquisition, the system enables accurate testing in accordance with UL 9540A and other battery safety standards, supporting R&D, certification, and safety evaluation applications.

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