Battery Cap Pressure & Burst Test System: Precision Pressure Testing Solution for Lithium Battery Safety Caps

Product Overview

The Nexisense battery cap pressure and burst test system is a dedicated pressure testing device tailored for cylindrical and prismatic lithium battery safety caps and rupture discs. In the entire battery manufacturing chain, the safety cap is responsible for pressure relief under abnormal internal pressure, directly determining whether the cell can avoid explosion risks. This equipment is designed for incoming inspection, R&D validation, and production line quality control in battery factories, providing standardized and traceable pressure performance verification methods.

Through an integrated design, the system combines pressure control, data acquisition, and result analysis into one unit, helping system integrators and engineering contractors seamlessly embed battery safety testing into automated production lines or laboratory management systems. Whether for upstream material supplier outgoing validation or downstream PACK enterprise incoming inspection, this tester ensures that caps maintain sealing integrity under specified pressure conditions and achieve reliable pressure relief at designed burst points, thereby providing data support for the safe operation of the entire lithium battery system.

Product Functions

The core functions of the system focus on pressure resistance testing and burst testing, while also supporting synchronous sealing detection and full-process data management.

In the pressure resistance testing stage, the system maintains pressure at a set value to verify that the cap has no leakage or structural failure, meeting the static pressure verification requirements of battery safety standards. The burst test adopts a uniform linear pressurization mode until the rupture disc breaks, with the system automatically recording and locking the peak pressure, providing precise pressure relief threshold data for R&D engineers.

At the same time, the system supports synchronous sealing monitoring, detecting micro-leakage trends in real time during pressurization to avoid misjudgment caused by manual testing. After testing, data is automatically collected and structured reports are generated, supporting Excel and CSV export formats. Through the Ethernet interface, it can directly connect to MES, ERP, or IoT platforms, meeting the requirements for quality traceability and compliance audits.

Main Components

The Nexisense battery cap pressure and burst test system adopts a modular integrated architecture, mainly consisting of the following parts:

• Fully automatic pressure controller: enables precise linear pressurization and depressurization control with adjustable rate;

• Reaction frame and dedicated fixture protection tooling: ensures stable positioning during testing and protects operators and equipment safety;

• Main unit and high-frequency acquisition software: built-in high-performance acquisition module with real-time waveform display and parameter configuration via computer monitor;

• Cabinet sheet metal enclosure: cold-rolled steel with electrostatic powder coating, integrating pneumatic, electrical, and control units, providing industrial protection and heat dissipation.

The complete system features a compact structure and flexible installation, suitable for direct integration into existing production lines or independent deployment in quality laboratories.

Detailed Core Technical Parameters

Quality Control and R&D Applications in Lithium Battery Manufacturing

In the lithium battery industry chain, the performance of safety caps directly affects battery safety under abnormal conditions such as thermal runaway and overcharge. The Nexisense tester provides standardized incoming inspection processes, generating reports with timestamps and batch numbers for supplier traceability.

During R&D, engineers can precisely plot pressure-time curves using adjustable pressurization rates and high-frequency acquisition to optimize rupture disc materials and structures. In production quality control, the system supports rapid fixture switching and automated testing for different cap specifications, integrating with SCADA systems via Ethernet for closed-loop quality management.

Integration with Nexisense IoT Edge Modules

As an industrial hardware and IoT edge module manufacturer, Nexisense extends data acquisition to edge computing. High-frequency data from this tester can connect to edge modules for preprocessing, alarm triggering, and cloud synchronization.

System integrators can build battery safety IoT solutions by integrating test data with other production sensors (temperature, voltage), forming full lifecycle safety records and enabling real-time dashboards and API-based analysis.

Installation and Maintenance

The system adopts a cabinet-integrated design. After installation, only power, pressure source, and Ethernet connections are required. Fixtures support quick replacement. IP54 ensures stable operation in typical factory environments.

• Regular air circuit sealing inspection

• Annual sensor calibration

• Filter cleaning

• Firmware upgrade and data backup

FAQ

1. How can this tester be integrated into an existing automated battery production line? 

The device provides an Ethernet interface and standard protocol data output, allowing direct connection to the production line’s PLC or MES system. System integrators can use Modbus TCP or a custom API to issue test commands, automatically upload results, and coordinate with fixtures—without the need for additional hardware interfaces.

2. What is the practical significance of a 10,000 Hz sampling rate for burst pressure testing? 

High-frequency sampling fully captures transient changes during the pressure rise, precisely capturing the peak pressure at the moment the burst disc ruptures. Compared to low-frequency sampling, this rate effectively prevents peak data loss, ensuring that R&D validation and quality control data meet the strict safety standard requirements for pressure relief thresholds.

3. How does the pressure source configuration affect on-site deployment? 

The system supports two options: high-pressure gas cylinders (G1/2 interface) and electric booster pumps, allowing engineering firms to flexibly choose based on the factory’s existing gas supply conditions. The cylinder solution is suitable for sites without power supply requirements, while the electric pump is ideal for automated production lines requiring unattended operation.

4. How do the data reporting and traceability features meet quality management system requirements? 

Each test record is automatically linked to the batch, time, operator, and peak data, generating digitally signed Excel/CSV reports. Engineers can batch export data via Ethernet to achieve seamless integration with enterprise ERP or quality traceability systems, supporting audits of automotive-grade quality systems such as IATF 16949.

5. What protection does the IP54 rating provide in practical battery factory applications? 

The enclosure complies with the GB/T 4208-2017 IP54 standard, effectively blocking dust and splashing water. It is suitable for the clean but not completely dust-free environments common in cell production workshops, reducing equipment failures caused by environmental factors and extending maintenance intervals.

6. How are equipment accuracy and long-term stability ensured? 

The pressure controller features a specification of ±0.1% FS or higher accuracy, combined with built-in overpressure protection and an automatic pressure relief mechanism to reduce mechanical wear. Regular sensor calibration, coupled with software self-check functions, keeps testing errors within specified limits over the long term, meeting the stringent requirements of engineering projects for repeatable data.

7. Does the tester support rapid switching between multiple cap specifications and batch testing? 

The dedicated fixtures feature a modular design, allowing engineers to switch between different cylindrical and square caps within 5 minutes. The software supports the import of batch parameter templates, enabling continuous testing of multiple units after a single setup, significantly improving quality control efficiency on the production line.

Summary

The Nexisense battery cap pressure and burst test system provides high-precision control, high-frequency data acquisition, and open integration interfaces, supporting system integrators and engineering teams across inspection, production, and R&D scenarios. Its integration with IoT modules enables digital and intelligent battery safety management.

With increasingly strict battery safety standards, selecting reliable, integrable, and traceable testing equipment is essential for successful project delivery. Nexisense offers stable industrial hardware solutions and welcomes integrators to request technical support and demonstrations.