During the batch testing and precise characterization of photovoltaic cells and small-scale photovoltaic samples, common open-type fixtures often encounter industry pain points such as unstable clamping, fluctuating contact resistance, environmental light interference, and low efficiency of multi-sample testing. Conventional single-group fixtures only support single-sample testing and require repeated disassembly and alignment for batch testing, resulting in high human error and poor test consistency. The open structure cannot isolate stray light, dust, and airflow interference, which easily causes drift in weak light test data and distortion of electrical parameters. Ordinary conductive contacts have poor wear resistance and unstable contact, and long-term testing is prone to contact failure and data jumps, making them unable to meet the strict requirements of precise testing, multi-group parallel control experiments, and efficient batch calibration for photovoltaic research. This greatly affects the accuracy and repeatability of photovoltaic test data.

Deeply engaged in the field of photovoltaic precision testing auxiliary equipment, Saifan Optoelectronics, relying on years of fixture design experience, combined with the high-precision and high-stability requirements of photovoltaic testing scenarios, has launched a four-piece sealed 3M battery fixture. With the core advantages of synchronous clamping of four pieces, full sealed light protection, 3M high-stability conductive contact, self-adaptive flexible clamping, and no frequent calibration, it solves the core problems of low testing efficiency, poor anti-interference, unstable contact, and data dispersion of traditional fixtures. It provides a stable, precise, and efficient dedicated clamping solution for photovoltaic cell performance testing, parallel experiments, multi-group sample batch characterization, and laboratory standardized testing.

Four-piece synchronous integration structure, doubling batch testing efficiency

The equipment adopts an integrated design of four workstations, and a single fixture can simultaneously fix and clamp four battery samples, supporting simultaneous testing of four groups of samples, parallel control experiments, and synchronous collection of multiple parameters. It completely overturns the inefficient mode of single-shot single-test of traditional single-piece fixtures, eliminating the need for repeated sample disassembly, repeated alignment, and calibration, significantly reducing batch testing time and effectively improving the testing efficiency of laboratory sample screening, process comparison, and data parallel verification. It perfectly adapts to high-frequency experimental scenarios such as new material iteration research, multi-batch sample comparison testing, and process stability verification.

Four workstations are independently partitioned and do not interfere with each other, with scientifically proportioned workstation spacing, avoiding light shading and electromagnetic interference between samples. Each workstation's testing status is independent, and data is not affected by each other, ensuring the synchronization and accuracy of four sets of test data, providing reliable hardware support for parallel control experiments and variable control experiments, and significantly improving the rigor and reference value of scientific research experimental data.

Full sealed light protection, eliminating environmental test interference

In response to the core pain points of photovoltaic testing being affected by stray light, dust, and airflow, the fixture adopts a fully sealed integrated light protection structure. When closed, it forms a complete darkroom environment, completely isolating external environmental stray light, air flow, and dust pollution from interfering with the test samples. It perfectly adapts to high-sensitive testing scenarios such as weak light response testing, steady-state spectrum testing, and low-efficiency battery fine characterization, eliminating environmental interference-related problems such as parameter drift, data distortion, and poor experimental repeatability from the hardware level.

The sealed structure can also effectively protect the surface of the battery samples, preventing them from getting dust, scratching, oxidation, and moisture during the testing process, protecting the original performance state of the samples, ensuring that each test is based on the true performance parameters of the samples, greatly improving the stability, accuracy, and repeatability of photovoltaic testing experiments, and conforming to laboratory standardized and refined testing norms.

3M high-stability conductive contacts, ultra-low resistance for precise connection

The core conductive parts of the fixture use original 3M high-precision conductive contacts, featuring ultra-low contact resistance, stable connection, good wear resistance, corrosion resistance, and strong oxidation resistance. Compared to ordinary metal contacts, they can effectively avoid problems such as oxidation short-circuiting, resistance drift, and contact failure that occur during long-term testing. The contact conduction performance is uniform and stable, capable of precisely conducting weak optical signals. It perfectly suits precise scenarios such as high-precision IV testing, spectral response testing, and weak optical characterization, ensuring no signal attenuation and no data jumps during the test.

After rigorous durability tests under harsh conditions, the 3M conductive contacts support tens of thousands of repeated opening and closing clamping operations. They have no performance degradation or contact deviation over a long period of use, eliminating the need for frequent replacement of consumables or repeated calibration of contact parameters. This significantly reduces the experimental operation costs and equipment debugging time, meeting the requirements of regular, high-frequency, and long-term testing operations in laboratories.

Adaptive flexible clamping, protective film and precise alignment

The fixture adopts a flexible adaptive clamping structure, with uniform clamping force and controllable control. It can closely adhere to the surface of the solar cell, ensuring adequate contact for conduction without suspension or open connections. It also avoids damage to the solar cell due to excessive pressure from rigid clamping. It precisely adapts to various types of thin-film photovoltaic samples such as conventional crystalline silicon cells, thin-film cells, and perovskite cells, and meets the clamping requirements for multiple specifications of solar cells. It has extremely strong versatility.

It is equipped with a precise limit positioning structure, enabling standardized alignment of samples each time they are clamped, eliminating manual alignment deviations. This ensures uniform clamping positions, uniform force distribution, and consistent test conditions for each sample, effectively reducing human operational errors and significantly improving the parallelism and accuracy of batch test data. It fully meets the strict standards of high-precision comparative experiments in photovoltaics.

Simple and efficient assembly and disassembly operations, compatible with all types of testing equipment

The overall structure of the machine is lightweight and integrated. It is convenient to open and close, and the disassembly is simple. Novices can quickly master the sample clamping and testing operations without complex debugging. This significantly reduces the operational threshold of experiments. The four-position synchronous loading and synchronous testing ensure a simple and efficient operation process, suitable for high-frequency experiments, batch sample screening, process iteration comparison, etc.

The fixture has excellent adaptability and can seamlessly integrate with all models of Sunway solar light simulators, spectral testing systems, IV testers, and photovoltaic performance characterization equipment. It can be installed and used immediately without modification. It can quickly set up standardized photovoltaic test conditions, perfectly matching the standardized testing systems of research laboratories, enterprise R&D centers, and quality inspection laboratories. The equipment's adaptability and compatibility are outstanding.

High-quality and durable structure, long-term stable and maintenance-free

The fixture shell is made of high-strength insulating engineering material, which is sturdy, wear-resistant, anti-aging, corrosion-resistant, and has excellent insulation properties. It can effectively avoid risks of leakage and electromagnetic interference, ensuring stable operation in long-term laboratory complex conditions. The overall structure is compact and not prone to deformation. It does not deform or sag during repeated opening and closing, maintaining precise clamping and stable conduction status. Its durability and stability far exceed those of ordinary conventional battery clamps.

There are no complex mechanical structures or easily damaged parts. Daily maintenance and cleaning are not required. This significantly reduces the later operation costs and equipment failure rate. With high stability, durability, and cost-effectiveness, it becomes a standard auxiliary tool for photovoltaic precision testing experiments. 

Precise clamping lays a solid foundation and enhances the quality and efficiency of photovoltaic testing

High-precision photovoltaic testing cannot be achieved without stable, interference-free, and standardized clamping fixtures. The four-position efficient synchronous testing, full-enclosed anti-interference protection, 3M stable conductive conduction, flexible protective film precise clamping, and simple operation features of the four-piece sealed 3M battery clamp from Sunway cover all scenarios of parallel comparative experiments, batch sample calibration, refined performance characterization, and regular research testing in photovoltaics. It provides a solid and reliable standardized clamping guarantee for photovoltaic material research, process optimization, and precise performance detection.