Creating parameter files - the input mask

If there is no parameter file, an input mask for creating a parameter file opens automatically.

This parameter mask shows you the validity period of your license, the installed version and the selected measurement (Parameters for: “File names”). If required, the result diagrams of your measurement can be evaluated in two languages. Activate the checkbox “Enable second language”. You can select the desired languages using the “First Language” and “Second Language” drop-down menus.

Batalyse currently supports the following languages:

  • German
  • English
  • French
  • Spanish
  • Portuguese
  • Russian
  • Japanese
  • Korean
  • Chinese

The measurement type is determined via the tabs “Electrochemistry” and “Advanced Methods - Batalyse Pro”. “Labels and Graphics” allows you to set diagram legends and gives you a choice of whether to label the C-rate, current density or power in the diagrams. The tab “Export” gives you the possibility to get your diagrams after the evaluation additionally as an image file.

“Electrochemistry” displays an input mask for electrochemical measurements.

In the tab Electrochemistry select the type of your electrochemical measurement. Currently you have the options “Electrochemical Cycling”, “Electrochemical Impedance Spectroscopy (EIS)”, “Cyclic Voltammetry (CV)” and “Pulse test”.

Under “File merging method”, if you select the option “Stack data”, all measurement curves of each individual measurement fille curves are displayed in one result diagram. This option is important when your cycle station creates more than one measurement file for the same measurement.

Select “Connect chronological data” for chronologically connecting measurements which are split into 2 or more files (Currently only functions with cycling).

The Basic Parameters selection allows you to enter electrode-specific parameters, such as:

  • Total electrode coating weight - the weight of your complete electrode (active material, conductive carbon black, polymer binder) without current collector
  • Active material percentage - the fraction of active material in your electrode in %.
  • Active material weight - the active material weight in your electrode
  • Cell area - The area of your electrode e.g. 0.785 cm² for round electrodes with d= 10 mm
  • Etc.

By clicking on the Extended Parameters mark, further input options are possible. These additional parameters can be used, for example, to calculate the capacity or the energy density related to the entire electrode stack.

Note: If you do not enter a value or “0”, the corresponding parameter is assumed to be unknown or not relevant for you and is not displayed in a result diagram. The more parameters you enter, the more result diagrams you get.

The Cell/Battery/Module parameters selection allows you to enter parameters for evaluating batteries or for extrapolating from a single cell to a battery.

In the Cycles to display selection you select specific cycle numbers, of which the voltage curve during charge and discharge is displayed in a result diagram. If additional temperature measurements have been made, diagrams are plotted for the selected cycles showing the voltage curve as well as the temperature curve during charging and discharging.

By activating the Auto-detect important cycles checkbox, Batalyse selects the relevant cycles for you. By adjusting the “threshold” you can determine how sensitive Batalyse is for this cycle selection. The threshold value describes the deviation of the capacity from the next cycle, for example because current or power were changed during the test. A threshold value of 5 % therefore means that a capacity change from cycle x to cycle x+1 above 5 % leads to results diagrams with voltage curves of cylce x and cylce x+1.

With the button Save to new JSON file a parameter file of type .JSON is created which contains the previously entered electrode/cell or battery parameters. By clicking the button, the selected measurement file is evaluated with the values of the parameter file and the result diagrams are plotted.

With the button Set as Default the values entered by you are saved for new evaluations. This saves you time when entering parameters, e.g. when evaluating similar/same cells and only a few parameters have to be varied.

If required, you can enter the name of the test file manually in the Test Name field and adjust it accordingly.

The Embed Graphs checkbox allows you to display your result graphs in Origin in a single workbook/worksheet. Double-click a results graph to display it as a full screen. If this feature is not enabled, a separate object is created for each result diagram created.

By activating the Embed Graphs checkbox, all diagrams are displayed in a worksheet. Figure 1: By activating the Embed Graphs checkbox, all diagrams are displayed in a worksheet.

Figure 2: If the Embed Graphs checkbox is not active, an object is created for each diagram.

Selecting the Delete Data Worksheet checkbox significantly reduces the Origin project file size by deleting the imported measurement data directly after evaluation. The result diagrams are not deleted or affected. A disadvantage, however, is that you can no longer manipulate the result diagrams directly. This means that if you have made an error in the input mask, it can be easily corrected later by making a corrected entry in the Origin Worksheet for all diagrams. This option no longer exists for a deleted worksheet. However, it is still possible to vary the view or the image section of the result diagrams.

The selection Active Material Display gives you the possibility to manipulate the legend in your diagrams. Some cell chemistries have been predefined and can be selected directly. Since there are many different electrochemical systems, you can directly label your legend manually by selecting the “User Specified” field.

You have to make sure to label the legend according to your selected languages!

Current Display Method allows you to display the C-rate or the current density related to the electrode area (mA/cm²) or the current density related to the active material (mA/g) or the power (W) in the result diagram. The display is depending on the selection for the discharge process or the charging process or for discharge process and charging process. If you want to select the C-rate, the corresponding information must be entered in the tab “Electrochemistry” under “Theoretical gravimetric cell capacity” or “Nominal cell capacity”. If you have forgotten this, you will be reminded as shown in the figure below.

Note: To calculate the C-rate, current density (mA/cm²) or (mA/g) or power (W), the average current of a cycle is used.

The result diagrams are automatically structured so that cycles with the same C-rate (etc.) are grouped. By entering “Rate decimal digits to display” you can, for example, round the C-rate in the diagrams, since “crooked” values can result from the exact calculation.

Example: You discharge your cell 5 cycles with 1C, but charge with 3C and then perform another 200 cycles with 10C. By selecting Charge + discharge rates, both 1C for discharging and 3C for charging are displayed in your result diagrams in the first five cycles. In the range of the following 200 cycles, both 10C for charging and for discharging are displayed.

The tab Advanced Methods (Batalyse Pro) can be used to evaluate non-electrochemical analysis methods such as layer thickness measurements, DEMS and online mass spectroscopy (MS). These measurements can be combined with parallel electrochemical measurements - e.g. to investigate which masses are formed when charging and discharging a battery cell or fuel cell. It is also possible to evaluate online MS measurements without accompanying electrochemical measurements. The parameter file is created by clicking on the Save to JSON File button.

By activating the checkbox Online-MS you can choose which masses (m/z) should be displayed in your result diagram. You can also specify a mass (m/z) to which your signals are to be normalized. This can be useful, for example, if you want to use a high intensity electrolyte signal as a basis to reduce temperature or electrode stack thickness changes as influencing variables on your measurement. In any case, you will receive a result diagram as measured, a result diagram normalized to the pressure and, if selected, a result diagram normalized to a specified mass.

If you have selected DEMS measurements, you have the possibility to enter calibration factors for your measurement.

Furthermore you have the possibility to display the complete cycle or only the charging or discharging process.

The Export tab gives you a few features that will hopefully help you create results reports and presentations faster. By clicking the Auto-export graphs to image files checkbox, all Origin result diagrams will be saved as graphs without any additional manual steps from your side.

The Image Format menu allows you to select the format of the image files. The following input fields allow you to enter a number of pixels for your graphics. If you activate the Export in gray scale checkbox, the graphics will be exported in grayscale without color. Use the Browse button to select a target folder for the export of your result graphics. Save as Default saves the entered parameters for your following evaluations.