Part Number:BQ78350-R1
Hi,
I'm encountering an issue that I haven't seen before. When I start charging the battery, comms with bqstudio constantly turns on and off. Is there a setting I changed to make this start happening? Thank you.
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BQ78350-R1: When I begin charging, I lose communication to bqstudio
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BQ40Z60: how do i make 'Standard Low Charging Voltage' and 'Standard Hi Charging Voltage' different?
Part Number:BQ40Z60
Hi,
seems with all the possible charge programming possibilities there is one missing...
Here is what i would like to do:
0C to 10C, Charge Voltage = 4.20V
10C to 45C, Charge Voltage = 4.20V
45C to 50C, Charge Voltage = 4.15V
50C to 60C, Charge Voltage = 4.1V
I'd like to make Standard Low Charging Voltage and Standard Hi Charging Voltage different but there seems to be only one voltage setting for both(??)
SLUUA04D, Figure 4-4 shows 5 Constant Current Mode Matrix columns:
- LT, Low Temp
- STL, Standard Temp Low
- RT, Recommended Temp
- STH, Standard Temp Hi
- HT, High Temp
and
bqStudio/ DataMemory/ Advanced Charge Algorithm/ shows 4:
- Low Temp Charging
- Standard Temp Charging (?Lo& Hi?)
- High Temp Charging
- Rec Temp Charging
Our Panasonic NCR18650B battery can use separate Standard Temp Charging voltages for the Lo = 4.2V & Hi =4.15V
any ideas how to over come this issue other than making the Lo = 4.15V like Hi = 4.15V for a narrow temperature range (10C to 12C)?
I'm under the impression T1 -> T2 -> T5 -> T6 -> T3 -> T4-> need to be increasing (can T2 = T5?? = 10C)
am i missing something?
thanks,
Tom
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BQ27421-G1: Reading Battery Voltage and Current from BQ27421 and send it to msp432
Part Number:BQ27421-G1
Hi Team,
On the product that we have designed there is BQ27421 used to monitor the battery voltage and current level.
I have gone through the technical reference manual for BQ27421 and it mentions that the data read and write between msp432 and bq27421 can be commenced over I2C.
However, I am not able to understand about the configuration part of bq27421 as mentioned in the manual.
Is there any sample example that I can refer to on how the bq27421 is configured and how is the voltage and current value read from it by msp432 controller?
Thank you
Vikram
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BQ27750: Complete standalone I2C fuel gauge for single li-ion cell (PACK)
Part Number:BQ27750
Hello TI team,
we currently work on a new design of an industrial powerbank (PB) with fuel gauge with following configuration:
4x 18650 Li-Ion cell in parallel (SAMSUNG, 3.6V, charge 4.2V nom,, 3350mAh/cell) >> total capacity 13.400 mAh
The PB should be w/o MCU. Therefore we are looking for:
- a completely standalone fuel gauge that stores all the data about the cell - I guess some kind of NVRAM - so it minimizes the need for MCU initialization when you wanna read it out (MCU is situated outside the pack)
- fuel gauge that can calculate remaining time (time to full, time to empty) based on a current charging/discharging rate
- logs cell aging
Idea is to have a battery pack with integrated standalone charger (PB) with I2C fuel gauge that you can read out externally (when docked) - MCU is on the docking station w/ graphic LCD => serves for analyzing powerbank state/condition.
Would you have a recommendation for the TI part? I used your selector and BQ27750 may be used but I prefer your advice. Can BQ27750 fulfill all our requested parameters? Does it contain internal NVRAM like BQ27411?
Thank you in advance.
With kind regards,
Daniel
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WEBENCH® Tools/BQ34Z100-G1: before starting learning cycle after updating all parameters full charge capacity is updated mismatch
Part Number:BQ34Z100-G1
Tool/software: WEBENCH® Design Tools
hi every one ,
iam testing battery of type : lead acid .12v 1.3Ah.
before starting learn cycle , after updating all parameters in bqstudio, full charge capacity is updated to 1200 Mah , but it should be 1300 Mah.
please verify my gg file, what parameter is required to update exact value. i attached the gg file and battery datasheet.(Please visit the site to view this file)(Please visit the site to view this file)
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BQ78350-R1: Decode Manufacturer Access() of BQ78350-R1
Part Number:BQ78350-R1
I am trying to access 0x0054, the OperationStatus() of BQ78350-R1 via ManufacturerAccess() when it is connected with bq76940. Following are the data that I had received:
0x04 0x05 0x4B 0x00 0x00
The first byte is the data length, and the next 4 bytes are the data that I had received. However, which byte is the LSB and MSB? the data that I receive should be 0x054B? 0x04B5? OR 0x0B45?
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BQ28Z610: About PIN5, PIN6 application.
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BQSTUDIO: Standard I2C-USB conection
Part Number:BQSTUDIO
Hello.
I need to use the bq35100EVM-795 evaluation module with BqStudio but I see that it's needed a specific I2C interface from TI, Is it possible to use bqStudio with an standard I2C to USB cable?
Best Regards.
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BQ4050: SmBus Communication to PIC16
Part Number:BQ4050
Hello e2e-Community,
first of all, please excuse my bad english....
currently I am trying to implement SMBus Communication between BQ4050 and a PIC16 µC in one of my projects. I've never done anything with SMBus, just I2C.
I'm trying to read Word with the PIC, for example the Cell Voltage,so I send the Addressbyte (0x16) and the Commandbyte(0x09).
What's Happening inside the BQ now? Does it store the CellVoltage in a Register, that I can read out, or does it send the Value to the SMBus Master?
I'm a bit confused and maybe stuck in the I2C-Communication....
I would appreciate your help!
Best regards,
Felix
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BQ35100: VREGIN and I2C
Part Number:BQ35100
Two questions regarding the BQ35100:
BQ35100EVM uses 5.6V zener diode for REGIN supply. Doesn’t that exceed the VREGIN absolute maximum of 5.5VDC?
Can SDA and SCL lines be referenced all the time, even when GE is low? Or will they draw current? Since they are open drain I think this is ok but wanted to double check.
Thanks,
Mark
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BQ40Z60: part will not learn full charge capacity
Part Number:BQ40Z60
I'm using BQ40Z60 in a 4s2p configuration with 8 1300 mAh LiFePO4 cells. I have chosen chemistry id 0x0401 from the database as I think this matches the cells I use closest. I discharged the set, waited until the rest flag is set and charged it. When the set then comes to rest, I see the individual cell capacities are updated, but the full charge capacity remains below 100 mAh. I repeated the learn cycle several times, but every time with more or less the same result. What am I doing wrong here? I added the configuration and the log file for reference.
(Please visit the site to view this file)(Please visit the site to view this file)
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BQ34110: What causes bqstudio error "Calibration – Pack Voltage correction is beyond allowed range" while calibrating voltage?
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BQ34110: Sense resistor value verify
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BQ34110: User Interface Connection for Displaying TimeRatetoFull and TimeRatetoEmpty Register Functions from BQ34110 Using MSP430
Part Number:BQ34110
So I have a set of 8 3000 mAh capacity Li-Ion Batteries that I have hooked up in parallel to develop a 24000 mAh battery pack. And my objective is to hook up this battery pack to a compatible IC chip that will read the TimeRatetoFull and TimeRatetoEmpty register functions and display it on some sort of UI display using a microcontroller.
My initial thought was to use the BQ-2040 chip to read these values, after calibration, using the EEPROM, but I was told by a TI engineer that the BQ-2040 is a legacy chip and is no longer used. His suggestion was to instead use an MSP-430 microcontroller to program a BQ-34110 chip to display these register function values on whatever UI display I decide to use. This is where I am stuck. I would like to use an LCD display as the UI interface. But I could not find any code samples on the internet that show you exactly how to program the chip to read these two register function values and route them to a display screen of some type. I would really like to get past this roadblock, as I have been stuck here for the past few months.
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BQ28Z610: BQ28Z610 re-charge issue
Part Number:BQ28Z610
After the BQ28Z610 is discharged (no electricity). When plug-in charge, the charge LED flashes quickly. But it is not charged. connect the software and click FET_EN it will no response. and click RESET it will return to normal. it is not the case for all boards with the phenomenon. And the problem is not always appeared. It is the probability. Can only click the reset to make the system normal. what is the problem, how can I solve the issue? Our configuration only change single-cell lithium battery, re-select the battery type, open FET_EN (use three batteries in parallel). No other changes.
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bq27541-V200 difficulty in achieving a learning cycle
hello
how can creat a golden image after a learning cycle,where can i find a .dfi file?
am using batterie management software
thanx
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BQ78350: After normal use for a period of time, suddenly unable to do normal charge and discharge?
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WEBENCH® Tools/BQ34Z100EVM: tested learn cycle for lead acid battery but learn status is in 0x04...
Part Number:BQ34Z100EVM
Tool/software: WEBENCH® Design Tools
hi everyone,
i am testing a battery of type : lead acid ,12v,1.3 Ah
Tested the learn cycle ... but no change in learn status ,but full charge capacity is updated to nearly 1200 Mah but no change in learn status,Maxerror ,update status.
(Please visit the site to view this file)
(Please visit the site to view this file)
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BQ40Z50-R1: Part Lifetime
Part Number:BQ40Z50-R1
Hi There,
I designed a system using the BQ34z651 gas gauge which has now become obsolete so I looking to redesign the system to incorporate the BQ40Z50-R1. Before I do so I just want to make sure that I am not picking a part that is going to go obsolete on me in the next couple of years. Do you have an estimate of long long I can safely assume the BQ40z50-R1 will be available?
Thanks,
David
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BQ20Z90: the register setting for the sleep mode
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