Gauging Parameter Calculator: Optimize room temperature performance for Impedance Track gauges

(ACTIVE) GPCRA0

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Description

Gauging Parameter Calculator – Optimize room temperature performance for Impedance track gas gauges (GPCRA0) / Golden GG Maker is a math calculation tool that helps the battery designer to refine the Impedance Track battery gauge parameters for a given battery profile. It provides optimized calculated values of for parameters like Qmax, Ra, and Thermal coefficients.

Chemistry IDs match must be obtained and correct chemistry must be programmed into the gas gauge prior to collecting data for room temperature performance optimization.

While Ra and Qmax parameters can be learned by the gauge automatically through performing traditional optimization cycle, this tool also allows to obtain thermal model parameters that do not update in single cell (handheld) gauges, which help with high rate tests accuracy. It also provides Ra0_charge value (helps to reach 100% SOC during charge more accurately), which does not self update and is not yet available in older chem IDs. In addition, this tool can utilize the log file from optimization cycle if some problems with learning Qmax and Ra have been observed, or to obtain all golden GG parameters by using Arbin or Maccor testers on a bare cell without using an actual EVM.

The tool requires a log file of a charge / relaxation / discharge /relaxation test performed under load and heat exchange conditions similar to actual device, or ideally inside the actual device.

The battery pack must use one of TI’s Impedance Track(IT) algorithm based fuel gauges. It accepts log files in the format specified in the instruction manual. The log files can be created by using TI’s Battery Management Studio (bqStudio) software with the specific Evaluation board connected through USB, or by any battery tester with data logging capabilities like Arbin or Maccor. External equipment is required for charge and discharge. For accurate calculations it will also require additional parameters of the battery pack setup. The output information will be emailed as a text file containing the parameter values to be programmed in data flash. If an exported Data Flash gg.csv file is included, the output will contain a gg_out.csv that has the updated information. The data can be imported and programmed into Data Flash using bqStudio to create a golden image that can be used in mass production of battery packs.

If bqStudio is used for logging, an EV2300 or EV2400 PC interface board is required to interface to the gas gauge, and a PC USB cable is required for communication with a PC. Both can be ordered online at http://power.ti.com. Windows™-based PC software is available online as well. With the EV2300 or EV2400 interface board and software, the user can read the data registers, program the chipset for different configurations, log cycle data for further evaluation, and evaluate the overall functionality of the solution under different charge and discharge conditions.

 

This tool does not require the purchase of a separate Mathcad™ license.

Depending on the specific gas gauge product, bqStudio software may provide a packaging utility to create the zip file from the log files.

Note: This tool is not applicable to Compensated End of Discharge Voltage (CEDV) gauges.

Step 1.

Download the instruction manual that applies to your battery pack and collect data per instructions.

This will yield a packaged zip file.

For Chemistry ID matching of Impedance Track(IT) gas gauging:

  1. Download Instruction manual for single / multiple cell (in series) battery pack
  2. Download Data packaging tool (bqStudio) that creates zip file for upload - optional

Step 2.

Upload the zip file.

Login is required.

Upload zip file

Step 3.

Gauging Parameter Calculation chemistry ID match report to be emailed to you.

View a sample report.

Email gpc_support@list.ti.com for support issues related to use of this page.

TI's Standard Terms and Conditions for Evaluation Modules apply.

Technical Documents
User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 59 10 Sep 2015 101

TI Devices (14)

Part Number Name Product Family
BQ20Z60-R1  SBS 1.1 compliant Gas Gauge with Impedance Track™ Technology  Battery Management Products 
BQ27520-G4  System Side Impedance Track™ Fuel Gauge With Integrated LDO.  Battery Management Products 
BQ27532-G1  Battery Management Unit Impedance Track Fuel Gauge for bq2425x Charger  Battery Management Products 
BQ27541-G1  Pack-Side Impedance Track Battery Fuel Gauge With Integrated LDO  Battery Management Products 
BQ27542-G1  Single Cell Impedance Track Pack Side Fuel Gauge  Battery Management Products 
BQ27545-G1  Single Cell, Pack Side, Impedance Track Fuel Gauge  Battery Management Products 
BQ27546-G1  Single Cell Impedance Track Pack Side Fuel Gauge  Battery Management Products 
BQ27621-G1  System-Side Fuel Gauge with Dynamic Voltage Correlation, Battery Gas Gauge  Battery Management Products 
BQ27741-G1  Pack-Side Impedance Track(tm) Fuel (Gas) Gauge with Integrated Protector  Battery Management Products 
BQ27742-G1  bq27742-G1 Single Cell Li-Ion Battery Fuel Gauge With Integrated Protection | Battery Gas Gauge  Battery Management Products 
BQ34Z100-G1  Multi-Chemistry Impedance Track Standalone Fuel Gauge | Battery Gas Gauge  Battery Management Products 
BQ40Z50  1-4 Series Li-Ion Battery Pack Manager | Battery Fuel (Gas) Gauge   Battery Management Products 
BQ40Z50-R1  1-4 Series Li-Ion Battery Pack Manager, Battery Fuel (Gas) Gauge  Battery Management Products 
BQ40Z60  Complete Multi-Cell Battery Manager | Battery Fuel (Gas) Gauge  Battery Management Products 

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