When you click any NDA format file or select View Data by right clicking on the channel, this will launch BTSDA . The basic view of BTSDA is seen below:
- NDA file is a kind of structured data file. This kind of file stores testing data and other information including steps scheduled and logged during testing.
- BTSDA is designed to organize data stored in the NDA file format.
Normally, BTSDA loads data from the last 20 cycles, but you can set it to load more by double clicking the bottom cycle axis, using the arrows on the axis to view other cycles.
You can set the default loading behavior of BTSDA in the Cycle Layer setting from the Parameter Setting after right clicking in the data area.
Default BTSDA Loading Behavior
Under title bar, there is a tool bar providing tools with quick access to the BTSDA functions.
BTSDA Tool Bar
The right side of the BTSDA window shows the structured data. There are three layers provided for an organized view and quick summary of the data. You can click to expand or collapse these layers.
You can select what data will be displayed by right clicking on the title of the data grid.
Data to Be Displayed
The title will only change when you have selected a row of data. You can also select a title name to highlight the selected column. If you want to select or unselect columns, click on their titles directly.
Advanced Menu of BTSDA
Right click in the data area, there are several commands provided.
- Expand/ Collapse: Same function as the Expand/Collapse tool on tool bar.
- Collapse: Collapse current data layer.
- Time Format: Choose time unit. If Single Step option is selected, the initial time will be zero for every step.
- Parameter Setting: Set data unit and choose display options for the data layers.
- Copy: Copy selected data into clipboard.
- Channel Information: View channel information.
- Log: View log.
- Marking DCIR: Select rows for DCIR calculation.
- DCIR: Guide to perform DCIR calculation.
- DCIR-P: Guide to perform DCIR calculation based on pulse data.
- Step Picture: View step infrared picture if infrared camera were installed and pictures were set to take.
- Export: Export data.
- Print Preview
Right Click Menu of BTSDA
Cycle Layer Settings
Cycle layer settings dialog is seen in below
Cycle Layer Settings
The left side of the BTSDA window shows the plotted date. At the top of the plotted area, there are several tabs with names corresponding to plot types. You can click on the tabs directly or use the arrows at the both ends to navigate. There are some other collapsed tabs which will display by clicking on the star symbol. You can also add and define other tabs by clicking on the plus symbol. You can drag tabs to rearrange their sequence or right click on the tab then select delete to delete.
Generally, when you move your mouse on to the axis, the column close to the axis will enable you to scroll the axis, and the other column will enable you scale the axis.
These toolson the Tool bar will enable you:
- Hand Tool: Drag the curves to adjust the viewing area.
- Arrow Tool: Double click on the curves, will show you the corresponding original data in data area when the curve has a Time or Cycle ID X-axis.
- Zoom-in: Drag your mouse in the shape of rectangle to zoom in.
- Flex Tool: Drag up to zoom in, down to zoom out.
- Reset: Reset the curves to their original states. This function is provided also on the right menu of the curve area.
- Copy: Copy graph to clipboard. This function is provided on the right menu of the curve area.
- Undo: Undo previous action.
- Redo: Redo previous action.
When you right click on the axis, the following options are available. You can set the grid lines by Setting Scale, change data unit by Setting Unit, show or hide the corresponding curves.
When you right click on the curve area, there is Curve Settings option allowing you to set curve parameters. You are allowed to assign a maximum of 4 Y-axis for a single graph. Y1 and Y2 are on the left. Set curve color or background color by clicking on the color block associated. Unselecting the label from the Label List will delete it. Right clicking on the label will enable you to rename the label or delete it.
BTSDA provides a quick compare for large amounts of data. By clicking the Comparative View tool on Tool Bar or Comparative View command under View on Menu Bar, you will see a screen similar to Figure 62. The left side will enable you to load additional data files and select the comparison mode. The right part will show you the compared curves and the bottom part will show you the summarized data.
Operations to the curve area are similar with what you can see from the curve view. There are some other right click commands provided like choosing steps or cycles range by Cycles and Steps Setting, exporting data and curves by Export.
This demo file has 3 charge-discharge cycles, if you want to compare the discharge curves to see the battery performance degrading, just choose the tab with the name of Capacity-Voltage, then choose the only discharge step by Cycles and Steps Setting. Some other curve tools like zoom-in or zoom out are also available for curve operations here.
DCIR is a key parameter for battery performance assessment. To calculate DCIR, there should be 2 voltage values and 2 current values.
You can select record rows from the data area directly to calculate DCIR, or launch DCIR calculator by clicking the DCIR tool on the tool bar or the command on the right click menu of the data area.
- The rows selected for DCIR marking should be applied in couple to mark DCIR records.
- You cannot mark more DCIR records between DCIR marking.
If you already marked DCIR records, you will see the result in the data grid by clicking Refresh button on the prompt dialogue.
You can choose Step DCIR or Pulse DCIR to load the targeted data to calculate DCIR. If you click Step DCIR, there will be options provided to enable you to manage what step groups and the exact records should be assigned as DCIR raw data. HPPC test from FreedomCAR manual has a DCIR algorithm which draws data from the last point of rest and the data from the last point of the 10 seconds pulse – discharge or regen. Now we set the step groups and data select methods. Clicking OK will show the calculation result in the data grid. You can copy or export the calculations.
Right click in the data area or click the Office Excel icon on tool bar to prompt the Data Export dialogue.
2 file formats are supported for exporting date: Excel and PDF.
- Visible Report: This will export all the data you have seen (WYSWYG: what you see is what you get) in BTSDA.
NDA View for Visible Report
Excel View for Visible Report
- Layer Report: This will create 4 spreadsheets in the exported file.
Excel View for Layer Report
a) Info: Includes equipment information and basic test information.
b) Cycle: Includes Cycle information.
Cycle Data for Layer
c) Statis: This will show you the step information
Step Data for Layer
d) Detail: This will show you all of the data.
- Customize Report: This provides you with the capability to choose what information is exported.
- Formation Report: This is a semi-function (Question: Not sure what this means) report. Can generate some formation information based on the first charge-discharge cycle.
- General Report: This will export data including Cycle, step and record layer in a single sheet.
Load More Data
1) You can right click on the header to load more data for the export.
2) For more BTSDA operations, see BTSDA Operation.
2 examples are posted below for reference.
- Example 1: The discharge capacities of all cycles performed are exported to an Excel file.
Capacity Fading - Step 1
Capacity Fading - Step 2
Capacity Fading - Result
- Example 2: All the test records of the discharge step in cycle 392 are exported to an Excel file.
Export Settings for Specified Data Range
If you want to create a subset of data from the current NDA file, you can use the data filter function. Click the filter symbol on the tool bar to set extraction criteria. You are able to choose different ranges by choosing a filtering pattern, and you can set it to extract all of the data record or partial records from the main channel or auxiliary channel only.
Data Filter Settings
Set the subset data file information including path and file name then click OK to create a subset with the criteria set above.
1) The subset data contains the same channel information as its parent file.