FUEL GUAGE UNIT & LED IS TURNING OFF WHEN BATTERY STATUS REACHES 30%
I AM FROM QMAX ANBU TEAM, USING BQ24735 CHARGER / BQ40Z50 FUEL GUAGE.I am using 0x0100 chemistry ID for our Project. We sent battery to your lab for testing, to get the chemistry ID. But still we didnt...
View Articlebq34z100-G1 Question about : 8.3.1.1 Standard Data Commands
Hello,I'm interested in polling the SOC of the bq34z100-G1 using a microcontroller. I was looking at section 8.3.1.1 and it mentions that the following command pairs are sent to retrieve the...
View Articlebq40z50 RSOC determination at low temperature
HiCurrently we have the problem with the bq20z65 BMS-Solution that the cell-pack voltage drops at the begin of discharge at low temperature(about -10°C) below the Term-Voltage threshold.This leads to a...
View ArticleBQ2014 ： FLGS1 (VDQ) set condition
Data sheet as follows are listed.1) On first discharge after NAC = LMD.2) DONE is valid.In other conditions, do you can set the VDQ?I'm waiting for comments.
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bq78350 information
Hi, Could you please clarify the three points in red below ? since the bq78350 does not have a charger integrated what this "charge" support refers to ?How connect an external charger on the battery,...
View Article5 Segment LCD Glass Part Numbers for BQ Gas Gauges
Hello,Several of the BQ range of Controllers and Gas Gauges support 5 segment LED / LCD displays to indicate battery capacity. I have been unable to source a suitble small 5 segment LCD display or...
View ArticleBQ34Z110 I2C w/ Ardunio
I'm trying to do data commands so that I can read the voltage,current, etc. Using code posted on this forum, I was able to access the data flash (checked subclass 112 and they match ), but I'm having...
View ArticlebqSTUDIO does not detect BQ27GDK000EVM (GDK)
Hi,When bqSTUDIO is run it asks for supported targets: Gauge, Charger, Integrated Gauge+Charger. Then it shows a list of supported targets. Non of the devices are compatible with the application.
View ArticleBQ34Z100-G1 applicability to Deep Cycle multiple cell Lead Acid Batteries
We are investigating the use of the BQ34Z100-G1 device for deep cycle automotive/marine applications.These batteries are typically 6 cell, 12V lead acid, High current (over 500 CCA) (old technology)...
View ArticleBQ3050 CUV fault from cell insertion
We have a 4S1P configuration. When we are installing the cells, the chip gets latched in a CUV state and turns off the discharge FET. These are all new cells charged to 4.2V. One way to clear this...
View ArticleCan the bq40z60 adapt to new battery packs when using it on the system board?
I am building a product where I want to allow my customers to replace their 4S battery packs. The battery pack will always be 4S but its capacity may change in the future. Can the bq40z60 learn and...
View ArticleBQ40z50 Thermistor Coefficients
I found datasheet slua398 and its associated excel spreadsheet but it wants the values for R1 and R2. According to the BQ40z50 datasheet, the thermistors are connected directly so these resistors are...
View ArticleProblem with Setting the IT Command
Hi AllI have problems with getting the learning curve done on a BQ34Z110 and on BQ34Z100G1I am sending the Command from The I2C write Byte as followsCommand 00 then 00 as bytethen command 01 and 21 as...
View ArticleVoltage balancing for PbA Chemistry
Hi,In the product literature of BQ32Z100 G1, it is mentioned that the battery cell voltages have to be balanced.In the schematic it is mentioned that bq77908 or bq77910 is used for voltage balancing.I...
View Articlebq34z100-g1 flash write error after setting VOLTSEL bit
Hello,After I set the VOLTSEL bit and the number of cells to 12 I am not able to write any other settings to flash.The bqStudio program shows the error: "a read of data written failed...
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bq34z100 currnet calibration error Issue.
Hi, this is KIM from korea.I use to setup bq34z100 evm. I use to setup at 13S cell system.1, there is no load2, Fallow design steps right.3. setup calibrate steps1-4. usually, It could be 0 mA in...
View Articleprimary and secondary protection with BQ769x0 + BQ78350
Good morning,I would like to design a flexible and compact primary protection circuit for a BMS. It seems the combination of the AFE ic BQ769x0 and its companion chip BQ78350 could be a suitable...
View Articlebq34z100 checksum
HiI am using BQ34Z100EVM and Arduino Uno like master I2c device. I am trying to change some settings in Data Flash (Pack Configuration, Number of series cell...) and i can to write new checsum. I tried...
View ArticleBQ40Z60 Config unused LED output
Hi,on my custom board I connected TS2/3/4 = PIN 11/12/13 to GND as I do not use it for LED output or sense input.Is this hardware configuration ok or should the pins be floating when not used?I set chg...
View ArticleBQ34Z100-G1 50A Application
Hello,This is for a 12V, 50A draw application. I'm getting tripped up on what sense resistor size to choose. Any guidance on going about calculating this value would be appreciated. Thanks,R04
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