Save battery parameters
Dear TII’m using the BQ27441EVM-G1A with the EV2300 and the Battery Management Studio 1.3.40.I connected a Li-based battery, I was fine, I mean, measure the voltage is perfect.But I cannot update some...
View ArticleBQ27742 Sense Resistor
TI SPEC sense resistor is 5 to 10 mohm. But it limited OCC is about 6A.If change it to 3mohm, whether we would meet leakage current risk? or other comment?This devcie can support 16000mAh? or any...
View ArticleBQ40Z60 limit charge and discharge current
Hi,how can the maximum carge and discharge current be limited in software.For charger limitation I found some Information in technical reference manual page 57:ILIMIT = Max Current Register / (RCHG x...
View ArticleBQ40Z50 problem during learning cycle
Hello,We are currently designing a battery pack featuring a bq40z50 configured for 3S. I was doing the learning cycle as following:1/ Configure the dataflash with appropriate parameters suitable for...
View Articlebq20Z45 shutdown mode and PackVoltage < Charger Present criterion
I want to force the chip to enter Shutdown mode. From the TRM:The bq20z40-R1/bq20z45-R1 enters Shutdown mode if the following conditions are met:• [SHUTV] in Operation Cfg C is set to 0 AND Voltage ≤...
View Articlechoosing between two types of gauges
Hi Ti, BQ27421BQ27425BQ27620 The first 2 use the same algorithm Impedance Track (IT) The last uses Impedance Track-Dynamic Voltage Correlation (IT-DVC) Between the first 2 the difference for our...
View ArticlebqStudio : icon for 'Learning Cycle' missing
I want to use bqStudio to carry out a learning cycle and generate a golden image.I have seen screenshots showing a 'Learning Cycle' icon, usually between the 'programming' and 'golden image' icons. But...
View Articlebq40z50 DSG Drive
Hello,using the bq40z50 with thetypical schematics (shown in the EVM PDF of the bq40z50) I recognized a weird behaviour. During Discharging the batteries with -20A the Voltage of the DSG pin jumps from...
View ArticleInductor for BQ40z60 EVM
I notice the the inductor used BQ40z60 EVM 2.2uH. Based on the datasheet formula, that that would create a ripple current of 2A with Vin = 20V and D = 0.6 for 4 cell battery. Isn't this too high?
View ArticleBQ27545 HDQ and I2C Communication
Hi Team, I am working on an application that requires communication to the BQ27545 via the HDQ and I2C interface. The HDQ interface connects to an external device and the I2C to a local processor for...
View Articlebq40z60 bring-up in custom hardware
One of my project, is a Li-ion battery based product (2-cells), and I would like to use a battery management IC to solve the charging process management, and the cell balancing.The questions I came up...
View ArticlebqStudio invalid download? Can't install
Hi All,I was given a download link to bqStudio, and the file I received (sluc525k) has no extension and windows doesn't recognize it's type, so I am unable to install the program. Computer is running...
View ArticleClik here to view.
bq40z50 - learning cycle, golden file, fcc and etc
Hello!I'm create new topic from here:I get other pack with same schematic and make discharge cycle with log file. In attach - gg before discharge, gg after, log file and srec.(Please visit the site to...
View ArticleBQ20Z45DBT-R1 NAKS
i am currently using a BQ20Z45DBT in my design and, periodically, the device NAKs SMBus commands. I currently have it built in to allow up to 5 successive NAKs before reporting an error. If I reduce...
View ArticleBQ27621EVM-G1 new board, no activity.
Everything is set up exactly as shown in this doc http://www.ti.com/lit/ug/sluuam6b/sluuam6b.pdfEverything is new out of the box, the cells attached are charged.The studio seems to work ,comms with the...
View Articlebq40z50 Ra table values changed?
I screwed up the first Gold file somehow, so after correcting some settings, I tried the process again. I was surprised when I was checking the exported .gg.csv file that in the Ra tables, the flags...
View ArticleFuel Gauge bq20Z655-r1 Chemistry File.
I am using a bq20z655-r1 and Saft cells MP174565 4800mAh I recently reinstalled the bqEVSW from: www.ti.com/.../sluc304At I start of bqCHEM : Warning! Communication with target device can not be...
View ArticleGeneral Question regarding Scaling
Hi,I am trying to specify/design a gauge for vehicles/vessels which could have battery banks as large as 1200Ah and charging currents up to 250A. The gauge would need to allow for a user selection of...
View ArticleIs there any way to manually set Full Charge Capacity (FCC) over I2C on a...
Hopefully a quick question for someone who has traveled this path before: is there a simple way to manually set the charge capacity FCC value on a BQ275** Battery Gas Gauge IC? We want to manually...
View ArticleBQ27541-G1 - is RUP_DIS being set a problem?
FYI, this is urgent, I need to understand why RUP_DIS is being set. I perceive it to be something we DON’T want happening.While the RES CURRENT change looks like it cleared up the -20C inaccuracy, it...
View Article