In the process of photovoltaic technology moving from the laboratory to industrialization, the stability
test of solar cells has always been a crucial link. Whether it is the humidity sensitivity of perovskite cells
or the thermal attenuation characteristics of heterojunction cells, both need to be verified for a long
time in a closed and controllable environment. However, traditional test fixtures often lead to data
distortion or prolonged experimental cycles due to poor sealing and insufficient environmental simulation
capabilities. Beijing Saifan Optoelectronic Instrument Co., LTD., relying on its 20 years of accumulation in
optoelectronic testing technology, has launched the 7-SCF09 sealed 3M battery fixture. With innovative
design, it has broken through the bottleneck of environmental testing and provided a full-scenario
solution for photovoltaic research and quality control.
The fully enclosed structure design creates a "micro environmental laboratory".
The 7-SCF09 adopts an integrated sealed cavity design. Through precise mechanical processing and
high-molecular sealing materials, it achieves IP67-level dust and water resistance, completely isolating
external temperature, humidity, oxygen and particulate matter interference. For instance, in the humidity
accelerated aging test of perovskite solar cells, the fixture can be used in conjunction with a high and
low temperature test chamber to continuously operate for 1000 hours under the "double 85" extreme
environment of 85%RH and 85℃. The consistency between the battery performance attenuation data
and the actual outdoor working conditions is as high as 98%. Its visual observation window and vacuum
pumping interface enable users to monitor the battery status in real time and quickly replace the gas in
the cavity, meeting the requirements of inert gas protection testing.
Multi-electrode precise adaptation, compatible with the entire process from R&D to mass production
In response to the diversity of electrode layouts in photovoltaic cells, the 7-SCF09 is equipped with an
adjustable electrode probe group, supporting flexible adaptation of 2 to 6 electrodes at a standard
spacing of 2.54mm. For instance, in the research scenario of carrier recombination in heterojunction
batteries, users can quickly switch test points through the probe group, simultaneously collect electrical
parameters from the front, back and edge areas of the battery, and precisely locate performance bottlenecks.
In addition, the elastic contact piece built into the fixture is gold-plated, with a contact resistance as
low as less than 1mΩ, avoiding signal drift caused by contact oxidation during high-temperature testing
and ensuring that the repeatability error of the I-V curve test is less than 0.5%.
Environmental simulation + four-wire testing, dual-engine drive for data accuracy
The breakthrough innovation of 7-SCF09 lies in the deep integration of the environmental control
module with the four-wire test interface. The micro heating plate and semiconductor cooling plate
placed in its cavity can achieve a wide temperature range adjustment from -40℃ to 150℃, and the
temperature fluctuation range is ≤±0.1℃. In combination with a humidity sensor and a nitrogen injection
system, it can easily simulate complex climates such as dry deserts and high humidity along the coast.
In terms of test efficiency, the dual BNC interfaces of the fixture support four-wire current-voltage
synchronous acquisition. Combined with the self-developed QE-300 quantum efficiency test system of
Saifan, the cross-verification of three sets of data, namely spectral response, dark current and I-V characteristics,
can be completed in a single experiment, shortening the experimental cycle by 60%.
Military-grade quality certification empowers both the research and development and industrial sectors
As a "Specialized, refined, distinctive and innovative" enterprise in Beijing, SOFN Instruments has
introduced aerospace-grade manufacturing standards into the field of photovoltaic testing. 7-SCF09
has passed the GJB 150A-2009 military equipment environmental test method certification. Its core
components have undergone 100,000 mechanical fatigue tests and cold and hot shock cycles from -55℃
to 125℃, and its service life is three times longer than that of similar products. At present, this fixture has
been applied in benchmark scenarios such as Longi Green Energy's pilot production line and the National
Photovoltaic Quality Inspection Center. For instance, in Longi's TOPCon battery wet heat test, the 7-SCF09
operated continuously for 2,000 hours without any seal failure or probe displacement, helping the customer
optimize the battery degradation rate from the industry average of 8% to 3.2%.
A full-cycle service network ensures that scientific research is worry-free
SOFN Instruments has established a nationwide "technical response matrix" : through the
service hotline, online work orders on the wechat official account, and on-site services by regional
engineers, it achieves a fault closed loop within 48 hours. In response to the customized demands of
customers, the company offers an integrated transformation solution of "fixtures + environmental
boxes + analysis software". For example, a team from a certain university needed to test the performance
of flexible photovoltaic cells in a bent state. Engineers from Saifan completed the surface adaptation
transformation of the fixture within 72 hours and developed a synchronous analysis algorithm for
stress-electrical parameters. The related results were published in "Advanced Energy Materials".
Conclusion
Under the dual waves of photovoltaic technology moving towards "GW-level mass production" and "
space application", the 7-SCF09 sealed 3M battery fixture, with its extreme environmental tolerance,
multi-dimensional test compatibility, and military-grade reliability, has become a "bridge" connecting
scientific research innovation and industrial application. Beijing Saifan Optoelectronic Instrument Co., Ltd.
will continue to define industry standards through in-depth technological research and development,
and jointly explore the infinite possibilities of green energy with global photovoltaic professionals.
Contact SOFN Instruments immediately to unlock a new paradigm of efficient testing!
Official website: www.7-s.com.cn
National Service Hotline: 010-80885970
Address: 4th Floor, Building 3, Fanghe Zhengyuan Industrial Park, No. 16 Guanghua Road, Tongzhou
District, Beijing
SOFN Instruments - Measuring the Future of Light with precision instruments.
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