The Invisible “Weak Link”:

Can One Testing Machine Hold the Line on Battery Safety?

Battery life and safety often fall victim to two invisible “weak links”—the negative electrode sheet and the electrolyte film.

Without rigorous material testing, the negative electrode sheet is prone to powder shedding and cracking during repeated lithium intercalation and expansion. The electrolyte film, meanwhile, may suffer fracture and interfacial debonding due to stress fatigue. These issues can cause a sharp surge in internal resistance and rapid capacity fade; in severe cases, they may even trigger internal short circuits and thermal runaway, creating serious safety hazards.

Therefore, conducting strict and standardized fatigue tests on battery electrode sheets and electrolyte films is an essential step for screening high-quality materials, mitigating risks, and ensuring long-term stable battery operation.

To meet the high-frequency fatigue testing needs of materials such as battery negative electrode sheets and electrolyte films, the Enpuda EHG-6502 electromagnetic high-frequency dynamic fatigue testing machine delivers a high-precision, high-frequency solution for dynamic mechanical property testing.

Enpuda EHG-6502 electromagnetic high-frequency dynamic fatigue testing machine

It can be used to test the dynamic and static mechanical properties of various metals, non-metals, composite materials, and lithium battery cell terminal posts.

It is capable of performing tensile, compression, bending, dynamic/static stiffness, and low-cycle fatigue tests under sine, triangular, square, trapezoidal, random, and combined waveforms.

Product Advantages

1. Convenient operation: Adopting a “horizontal floor-standing structure”, it has good dynamic stability. The electrically-driven moving crossbeam can be raised and lowered, and it can be manually locked. The operation is flexible and convenient.

2. Advanced motor technology: Utilizing electronic servo and DDR torque motor drive technology, it features high efficiency, long lifespan, low noise, and maintenance-free.

3. High-precision measurement: Equipped with high-precision dynamic load sensors and high-resolution displacement sensors, it can accurately measure force values and displacements.

 4. Fully digital measurement and control: It can achieve closed-loop control of displacement and deformation. The test software can run in a Windows Chinese environment, and the microcomputer system can complete test settings, working status control, data acquisition, and calculation processing. The simple and reliable human-computer interaction interface and data processing interface can meet the different experimental requirements of users.

5. Powerful data processing: The test conditions and results can be automatically saved, displayed, and printed. The data processing function is powerful.

6. Various protection measures: In case of sample damage, tooling fracture, or equipment failure, the test will automatically stop and an alarm will sound. During the automatic control of the test, the testing machine has various electrical protections such as overload, over-angle, over-temperature, electronic limit protection, overcurrent, overvoltage, etc., and mechanical mandatory safety limit protection in the software part.

The Enpuda EHG-6502 electromagnetic high-frequency dynamic fatigue testing machine is not only suitable for fatigue performance testing of various conventional metallic materials, but can also be extended to fields such as biomedicine (e.g., small medical devices like orthopedic implants, dental materials, cardiovascular stents, and medical polymers), polymers and composite materials (e.g., various rubbers, engineering plastics, and foam materials), and precision electronic components (e.g., durability testing of phone hinges, key switches, and micro connectors).

In addition, the equipment offers high versatility and cost-effectiveness, making it widely applicable across diverse settings including enterprises, universities and colleges, research institutes, and third-party testing organizations.

The Enpuda testing machine provides fatigue and reliability testing support for the new energy sector—from materials to components—helping advance key technologies such as energy storage and power batteries.

Going forward, we will continue to focus on the upgrading needs of the new energy industry, driving material innovation and engineering applications with precise and efficient testing solutions, and delivering professional value to our customers’ R&D and safety assurance efforts.