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When we think of battery testing, we always think of safety and quality.
We all know the picture of the burned out Tesla. Or the story of the new Samsung Galaxy Note 7 phone that spontaneously caught fire due to a construction fault. How can we avoid such situations as much as possible and how can we minimise the consequences?
And let’s start with the latter.
Provide a safe test environment. This includes special extinguishing equipment, special fire-resistant cabinets and, for example, climate chambers with special facilities.
We can divide the testing of batteries into three specific sections:
–The testing of a battery cell
–The testing of a battery module
–The testing of a battery pack
The basis for a safe battery is laid with the testing of the battery cells. In Europe this generally means that we perform an incoming inspection on battery cells that are imported from the Far East.
By performing an insulation test we can determine if the separation of the poles by the dielectric is contaminated. We also check the leakage current and whether there is any partial discharge or arcing. We then determine the internal impedance and the capacity of the cell at various temperatures and charging voltages. For detailed information on how we perform these tests, we refer you to the page testing a battery cell
The tested battery cells are then incorporated into a battery module. And there the series of tests actually starts again. First, to see if the cells are connected to each other properly. Then a test to see if there are no bad cells in the module and whether the module meets the specifications. It is also possible to test the BMS (battery management system) for proper functioning.
For a detailed explanation about the different module tests, we refer you to ‘Testing a battery module‘.
Next, it is possible to connect a large number of modules to form a battery pack. This is of course the case in higher power applications such as electric cars, buses, trucks and even electric boats.
And here the testing starts all over again.
– What is the capacity of the battery pack?
– And how much capacity do I have when the temperature drops to -10 degrees Celsius?
– Or plus 40 degrees Celsius?
– What if we are going to load the battery dynamically?
– What if we also recharge the battery with short (brake) pulses?
How far can we discharge the battery without damaging its lifespan?
Here too we refer you to testing a battery pack to see what the possibilities are for extensive testing of a pack. For total testing solutions, please refer to the page on automatic battery testing software and testing systems.
We also recommend the complete presentation we made for the Energie Storage Event 2020, ‘Testing Li-ion Batteries‘.
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"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."
University of Luxembourg
“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”
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