Pouch Cell Test Fixtures

Pouch cell test fixtures can be customized according to the customer’s cell specifications, testing pressure, installation space, and laboratory environment. The fixture material, dimensions, clamping structure, number of layers, layer spacing, pressure range, sensor configuration, and mounting method can all be adapted to specific requirements.

Customized fixtures are suitable for:

• Non-standard pouch cell dimensions;
• Large-format or thick pouch cells;
• Parallel testing of multiple cells;
• Testing systems that require pressure sensors;
• Glovebox or environmental chamber operation;
• High-temperature, low-temperature, or corrosive environments;
• Special mounting holes and equipment interfaces;
• Specific pressure ranges and cycling requirements.

Before customization, customers are encouraged to provide the cell length, width, thickness, tab position, required clamping force, number of cells, test environment, and available installation space.

1. Fixture Structure Options

Fixture Structure	Main Features	Typical Applications
Basic Four-Corner Locking Fixture	Four-corner screw locking with spring buffering	Standard pouch cell cycling tests
Three-Layer Sensor Fixture	Integrated pressure-sensing layer with external signal connection	Real-time monitoring of clamping or swelling pressure
Four-Layer Test Fixture	Parallel stacked-plate structure, generally for one cell	Single-cell cycling and controlled pressure validation
Five-Layer Test Fixture	Multi-layer structure for parallel cell testing	Multi-cell comparison and higher testing throughput
Custom Fixture Structure	Designed according to cell and equipment requirements	Non-standard cells and specialized testing systems

2. Material Selection

Material	Main Characteristics	Recommended Applications
PP Polypropylene	Lightweight, electrically insulating, and resistant to electrolyte exposure	Low-pressure testing, glovebox work, and chemically sensitive experiments
5052 Aluminum Alloy	Lightweight with good corrosion resistance	Testing that requires low weight and chemical resistance
6061-T6 Aluminum Alloy	Balanced strength, machinability, and handling convenience	Routine laboratory cycling tests
7075-T6 Aluminum Alloy	High rigidity and load-bearing capability	High-stability testing and applications requiring reduced deflection
304 Stainless Steel	High rigidity, durability, and non-magnetic construction	General-purpose high-strength testing
316 Stainless Steel	Enhanced resistance to corrosive environments	Electrolyte leakage, immersion, and long-duration testing
Carbon Steel	High structural rigidity and suitability for heavy loads	High-pressure and cost-sensitive testing
Custom Materials	Selected according to pressure, temperature, corrosion, and insulation requirements	Special laboratory environments and dedicated equipment

If standard materials do not meet the testing requirements, other suitable metals or engineering plastics may be evaluated according to the customer’s application.

3. Pressure and Size Selection

The current product range includes configurations from low-pressure to high-load testing. The actual pressure range depends on the fixture material, dimensions, layer structure, spring configuration, and pouch cell specifications.

Customers should confirm the following parameters:

• Standard working pressure;
• Maximum design load;
• Cell thickness variation range;
• Fixture plate dimensions;
• Cell length and width;
• Number of cells tested simultaneously;
• Whether pressure sensing is required;
• Whether customized layer spacing is required.

For non-standard pouch cells, the fixture length, width, thickness clearance, plate structure, and layer spacing can be designed according to customer drawings or cell specifications.

4. Customization Options

Customization Item	Available Customization
Material	PP, aluminum alloy, stainless steel, carbon steel, or other suitable materials
Overall Dimensions	Fixture length, width, height, and plate dimensions
Cell Compatibility	Cell length, width, thickness, expansion allowance, and tab position
Clamping Pressure	Standard pressure, maximum load, and spring-buffer range
Number of Layers	Basic, three-layer, four-layer, five-layer, or dedicated structures
Sensor Function	Pressure-sensing layer, sensor interface, and external connection method
Mounting Method	Mounting holes, fixing method, and equipment interfaces
Electrical Insulation	Insulating layers, surface treatment, and isolation structures
Operating Environment	Glovebox, environmental chamber, high humidity, corrosive, or special-temperature environments
Batch Configuration	Prototype, small-batch testing, or multiple fixtures with unified specifications

All customized designs should be technically confirmed before production based on the customer’s cell dimensions, required pressure, testing environment, and equipment interface.

5. Typical Applications

• Pouch cell charge-discharge cycling;
• Battery life and rate-performance testing;
• Cell swelling and thickness variation studies;
• Research on pressure and electrochemical performance;
• Comparison of electrode and electrolyte systems;
• Parallel testing of multiple pouch cells;
• Battery testing inside gloveboxes;
• High- and low-temperature testing inside environmental chambers;
• Electrolyte leakage and corrosion-environment testing;
• Integration with customized battery testing equipment.

Frequently Asked Questions