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Strata Enabled Smart LiB Gauge Automatic Support Tool 

 

http://onsemi.com 

7

 

 

 

 

Figure 6. WIRING TO A CYLINDER TYPE BATTERY 

Note: Do not solder the connecting wires and battery terminals directly. Use spot welding.

 

 

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Connect the 10 kΩ NTC thermistor to TEMP and VSS. To measure more reliable cell temperature, attach temperature 
sensing part to the battery using sticky tape as shown in Figure 7. If the battery pack has a built-in thermistor, this can be 
used instead. 

 

Figure 7. A LEAD TYPE THERMISTOR MOUNTING 

 
 

2.

 

Discharge cell voltage curve measurement with an external load device 

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Charge the target battery to full charge using an external charger.  

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Connect the battery and an external load device. The load device may be a power supply instrument or user’s application. 
The STR-SMARTLIBGAUGE-GEVK requires that the load device approximately discharge the battery with constant 
current or constant power. 

For example, if an application has an efficient power supply such a DC-DC converter, it may discharge the battery with 
constant power. 

Battery 

Thermistor 

BAT+ 

BAT- 

VDD 

TEMP 

VSS 

Branch point 

Branch point 

Spot welding 

Summary of Contents for LC709204F

Page 1: ...f any support or applications information provided by onsemi Typical parameters which may be provided in onsemi data sheets and or specifications can and do vary in different applications and actual p...

Page 2: ...Semiconductor Component Industries LLC 2020 October 2020 Rev A 1 Publication Order Number Contact your local Sales Representative Strata Enabled Smart LiB Gauge Automatic Support Tool User Guide...

Page 3: ...Strata Enabled Smart LiB Gauge Automatic Support Tool http onsemi com 2 Table of Contents INTRODUCTION 3 Features 4 Applications 4 USER GUIDE 5 HARDWARE SETUP 5 PLATFORM CONTROL 10...

Page 4: ...r Guide Figure 1 AN EXAMPLE OF CELL VOLTAGE CURVE WITH CONSTANT CURRENT DISCHARGING Smart LiB Gauge LC709204F Type 02 Processing unit Battery profile Type 01 Application processor APA Register I2C Gau...

Page 5: ...and discharging with an external load and charger Users can simulate RSOC within the GUI using the cell voltage curve and optimum battery parameters Built in safety mechanism causes automatic measure...

Page 6: ...ry parameters for the Smart LiB Gauge using on board load The second setup is used when an external load device discharges battery The third setup is used to evaluate charge dedicated battery paramete...

Page 7: ...nch connection is given in Figure 5 This will help to obtain the better parameters for Smart LiB Gauge because it can reduce the voltage variation so called IR drop STR SMARTLIBGAUGE GEVK Battery Pack...

Page 8: ...ead Figure 7 A LEAD TYPE THERMISTOR MOUNTING 2 Discharge cell voltage curve measurement with an external load device Charge the target battery to full charge using an external charger Connect the batt...

Page 9: ...with the on board load Application Battery Pack Load Circuits Battery Charger STR SMARTLIBGAUGE GEVK Load block Gauge VDD VSS BAT BAT TEMP TH P P Major currentflow Imported wiring resistance Figure 8...

Page 10: ...an external charger in the same manner as shown in Figure 9 The charger should follow general CC CV charging methods and satisfy the battery charging specifications e g charging voltage charging curr...

Page 11: ...he measurement conditions and provide the result as graphs and a log file 1 Open the Strata Developer Studio and Login to open the home screen 2 Connect the Strata board to the PC using a USB Mini B c...

Page 12: ...The charging voltage is specified in the battery datasheet It may also be called as terminal voltage of the battery The pull down list components refers to the battery profiles installed in the Smart...

Page 13: ...farad nF Otherwise leave it as 0 00nF APT at the bottom of Capacitance box is calculated from Capacitance value automatically The STR SMARTLIBGAUGE GEVK uses the APT value to delay temperature measure...

Page 14: ...ers available but only one On board Load Current can be selected as shown in Table 3 Estd Test Time and Log Interval are displayed to the right of the slider Estd Test Time is used to stop measurement...

Page 15: ...e on each Log Interval time specified on the UI Simultaneously this data will be plotted into graphs If any one of the conditions shown in Table 5 is detected in measurement the STR SMARTLIBGAUGE GEVK...

Page 16: ...acity 200 ChargingVoltage 4 35 DischargeCut offVoltage 3000 ThermistorSpec BConstant 3600 Capacitance 0 APT 30 MeasurementCondition BatteryStatus Discharge On boardLoad Enable LogInterval 2 On boardLo...

Page 17: ...luated designed or tested using the board you agree to test and validate your design to confirm the functionality for your application Any technical applications or design information or advice qualit...

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