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bq20z45R-1 capacity error
Above is screen capture from eval software for the bq20z45R-1. This is from a production pack 2S4P, this pack just finished a full charge a few minutes before this was captured... as the voltage has...
View ArticleDisappearing R_DIS and VOK
We have had several batteries that have been in use for months with he problem of R_DIS and VOK not set. They we set when the pack was built and sealed. If I send a reset (41) they will appear. What...
View ArticleFuel Gauge IC Recommandation
Hello,I am a Student at University of Toronto working on a project, would appreciate some recommendation on a fuel gauge IC. I am using 6 18650 Li-ion batteries in series as our battery supply (total...
View Articlebq28550 runtime error 13: type mismatch
Hello,I'm working on a bq28550EVM and trying to configure the Data Flash with TI bq Evalution Sofware(0.9.80). But I have a problem every time I try to open the Class Calibration, other Class are...
View Articlebq76PL536A Evaluation Module schematic and modifications to change EVM to 3 x...
The data sheet mentions full-size reference design schematics are available on request. Where are these located for the bqPL536A Evaluation Module?Secondly, how can the EVM be modified to configure it...
View ArticleIs there any difference between Fuel Gauge IC of TI?
Hi,I have a question about Fuel Gauge device.I will change Fuel Gauge device which is embedded in product from BQ30z554-R1 to BQ20z45-R1.I know that communication interface of those device is SMBus.Is...
View ArticleBattery Safety Verification
Hi,Often we are required by our customers to prove that all safety features of a battery operate as specified. I was wondering if Ti have produced a document, application note or similar that advises...
View Articlebq20z75 FETs on without Impedance Track
Is it possible to turn on the CHG and DSG FETs without enabling Impedance Track? I need this for a test.
View Articlebq27531 Not updating SOC during Discharge
While bringing up a bq27531 design in MLC mode, the SOC during discharge does not change from 100% until discharge cutoff when it corrects to 0%.When I try the part in MLC w/SoH Comp or CCCV modes it...
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bq27425-G2A / Behavior when both SDA and SCL are held High
Hi,I'd like to ask about the behavior of bq27425-G2A when both SDA and SCL are held High. I checked the datasheet and understood that it goes into sleep mode when both SDA and SCL are held low for 2...
View ArticleChemistry ID
Hello,We're having problems running the MathCad chemistry id script. Could someone work out the Chemistry Id from this discharge Cycle.Regards,Niro.
View Articleabout golden pack of BQ27500-V130
I am using BQ24032A& BQ27500-V130 at our product, BQ24032 for charge and BQ27500 for faul gauge . Now there are some questions:1. I need to make our golden pack , should I do it on our user board...
View Articlebq34z110evm configuration
Hello Tom,I connected a 12V/7.2Ah battery to bq34z110evm with no load attached and tried to configure the data flash via EV2300. I can change the Qmax cell 0 to 7200 mAh. However, I could not change...
View ArticleBQ77908 Doubt
Dear All,I am designing a battery pack composed of 15 series LiFePO4 cells, each one of 20Ah for a small UPS system.As for the cell balancing function, I intend to employ two IC BQ77908A to monitor the...
View ArticleBQ28550-R1 SMBUS communication
Hello,I'm using a gas gauge BQ28550-R1 connected to the I2C interface of our i.MX6 application processor. The BQ28550-R1 uses the SMBUS serial data interface which is apparently a subset of I2C...
View ArticleBQ27421YZFT-G1A state of charge and state of help
Hello all,We are using BQ27421YZFT-G1A with a 95mAh Li-ion battery. We are reading the following things:Temperature is 3043 voltage is 3854 Flag is 0 Nominal Available capacity is 95 Full Available...
View ArticleBQ27741-G1 change value for OCD
Dear all,we use the bq27741-G1 for a single cell apllication. At the moment we use a 5mOhm shunt and the overcurrent cutoff is at 6,4A like the 34,2 mV OCD from default configuration indicate.We can...
View ArticleBQ27200 EEPROM programming
Dear all,I'm using the BQ27200 in a very small PCB.I place a test point on PGM PIN in order to access EEPROM.in the datasheet it is not well elaborated.I want to create the 21V pulse from an external...
View ArticleAccessing Data Flash on bq27541-G1
Hi everybody,I'm currently working on trying to access the data flash of bq27541-G1 through the i2c interface.I managed to access the data block (subclass ID 48 in the datasheet) and read the Device...
View Articlemulti-cell fuel gauge
I am making a Battery Management System for a 7 to optional 10 cell LiPo battery, now 7S4P. 75 Amp max output. I'm a bit scared by seeing the post "BQ78PL114 + BQ76PL102 fail randomly" on this site,...
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