Battery Screening

Screening incoming battery cells and selecting good cells for module assembling guarantees a longer service life of your battery-driven products.

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Your Challenge: Poorly produced cells

Minor changes in the production process of your battery supplier lead to major changes regarding battery performance and service life of your product. Produced battery cells can significantly differ in quality. When assembled to a module, the worst cell determines the performance of your battery system.

Without a systematic screening process, you never know which of your delivered cells are deficient and which ones are superior. By assembling unscreened cells to a battery system you cannot ensure a constant quality. The integration of only one weak cell may jeopardize your product’s success.

The solution: Screening incoming cells

The key for long-lasting battery systems is to screen incoming cells and select the optimal ones for your application. With a precise measurement of your cell delivery, you can easily distinguish between cells of different quality. You decide which ones are good enough for module assembly and which ones you want to claim compensation for.

Sorting out the weakest cells can extend your battery systems service life by 50%. The ability to additionally identify cells of intermediate quality and only assembling optimal cells enables an increase of another 25%. This paves the way for better products, less waranty claims and new battery applications.

How we do it: The Safion method

The sole measurement of the internal resistance (IR) and open circuit voltage (OCV) as inspection techniques can not identify lithium-ion battery cells of reduced service life. Only the measurement of at least 20 impedance points at different frequencies reveals hidden degradation mechanisms in screened lithium-ion battery cells. Using an online EIS method Safion products can provide precise insights for cell selection and a guaranteed service life.

With our battery screening system ExaMight we also reduce the measurement time for the impedance spectrum of more than 20 points from minutes to seconds. This enables an extremely high screening throughput.

It works: The undisputed scientific proof

Numerous scientific publications back the capabilities of Safion’s online electrochemical impedance spectroscopy (oEIS) technology and prove the strong evidence between the screening results and battery service life.

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