Help with Battery fuel gauge and cell balancing chips. Total Confusion
Good evening everyone, i am a junior electronics engineer and i am designing a new 4s 20Ah Li-po Battery management system for a portable instrument and i am somewhat confused regarding to the chips...
View ArticleQmax Update - 5 hour waiting Time
In SLUA458, page 45 under "Update of Qmax" the following statement is made:"A well-relaxed state is detected if dV/dt<4 µV/s or maximal waiting time of 5 hours is exceeded."My question is regards to...
View ArticleBQ34Z100-G1 calibration without using evaluation tool
Hi,We are trying to calibrate bq34z100-g1 for non-rechargeable Li-ion cells. We are using 2 cells in series. Can anybody help with the calibration steps we need to do without using evaluation...
View ArticleBQ40Z60 EVM design AFE fuse
Hi,according to my understanding the FET (Q7) is not correct. The current that will go trough is much to high, calculated like 2-4 A depending on number of cells and the value of "heater-part" in fuse....
View ArticleRegarding Battery charger circuit and fuel gauge
Hi All,We are working on one solar panel based project. In that project we have to charge our battery using Solar Cell.For that we are planning to use one charge controller for charging battery through...
View ArticleAbout Baud rete of BQ27542-G1 UART
To whom it may concern Could you please tell me about how to use UART of BQ27542-G1? Q1: How much is baud rate of the BQ27542-G1? Because it isn't write in the datasheet of BQ27542- G1. Q2: Can...
View ArticleBQ27510-G3 parametrs
Hi, Can I use bq27510-g3 without program it with ev modules and PC application? My IC is already soldered on PCB. What registers do I need to program in order to make battery learn cycle? Regards, Vojin
View Articlebq78350, battery has a bad cell, still SOH = 100%
Hello,I designed a BMS using the bq78350, in my testings I came across a battery with one damaged cell, its capacity is less than other cells, so is its voltage on discharge (high internal resistance),...
View ArticleBQ27510 Gas gauge IC version G2 to G3 upgrade
As the Gas gauge IC BQ27510 upgraded from G2 to G3, we are planning to use G3 version ICs in new boards. This requires to create new golden image file (.DFI) so that it will be suitable to use with G3...
View ArticleBQ34Z100-G1 I2C communication errors
My application uses a MK70FN1M0VMJ12 µC to talk to the bq34z100-g1 via the I2C bus. It works most of the time but occasionally the gas gauge chip fails to accurately report the SOC. Sometimes it...
View ArticleChip latches up and stops I2C communication (SCL internally stuck low)
I am using the BQ34Z100-G1 chip with BQStudio and EV2300. After talking I2C for some time the chip latches up and stops talking. The only clue is the SCL seems to be pulled down internally and...
View ArticleFaulty EV2400. Unable to detect
Hello,I'm having trouble with a EV2400 box. The computer is not detecting the EV2400 when I connnect it.From what I can see the three LEDs are on but it does not shows up in device manager or BQStudio...
View ArticleBQ27421 Issues connecting to bqEVSW
Hi Team,SLUA595 says to use EVSW in Figure 1. When I run bqEVSW it hangs my product’s I2C bus and says it is connected to an incompatible device. I think I remember seeing somewhere mention of SMBus...
View Articlebq40z60 ACP current draw
I'm using a bq40z60 in a custom circuit based on the EVM design. When the charger is disabled, the voltage applied to VAC is reflected accurately in the AC adapter voltage register (after...
View ArticleBQ27541-g1 : Incorrect internal temperature value
We use TI BQ27541-g1 as fuel gauge for our product.We are trying to read battery temperature from fuel gauge internal temperature sensor – 0x28 and 0x29. It returns a value 151 . Datasheet mentions...
View Articlenot getting the response from the bq27421g1
Hi, i followed the steps mentioned "bq27421g1 Technical reference manual" but still am not getting the any response from the "bq27421g1" when am trying to read the battery percentage from the...
View ArticleFlashstream
I'm working on our production process for our bq30z554 and have been able to read/write from flash using an Aardvark I2C device. Judging from the scattered information I have found, it sounds like I...
View ArticleBQ34z100EVM calibration
On Page 8 of the EVM user manual covering Battery Management Studio, it states:3.3.1 Voltage Calibration• Measure the voltage from BAT+ to BAT– and enter this value in the Applied Voltage field and...
View Articlebq3060 cell voltage discrepancy
Hi,I'm having a problem with BQ3060 where the cell voltages are really off.I measured 2900mV and the bq Eval sw reports 3600mV.That's a lot of discrepancy. I have not performed any voltage calibration,...
View ArticleBQ40Z60 Protection circuit between VSYS and VAC
Hi,do we need a protective circuit between VAC (charge) and VSYS (discharge). In our application it could be possible that the AC adapter voltage is accidentally connected to VSYS.On the evaluation...
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