BQ28Z610: I2C broadcast.

February 7, 2018, 8:32 am

≪ Previous: BQ27541-V200: How to update GPCRB *.chem by bqEVSW?

Part Number:BQ28Z610

Hi,

I was trying to get the I2C broadcast working on the BQ28z610, after looking at it for a while I checked the forum and I found a post that said the broadcasting feature has been taken out in version 0.17. On my device I currently using - HW-version 06, FW-version 0017, FW build 0016.

Could you tell me if this is true or not or should I be able to get this to work.

I've probed the I2C bus, and changed the address settings and broadcast interval time and also BCAST bit is on as well as GAUGE_EN and nothing happens.

regards,

Reuben

↧

BQ40Z50-R1: mVh vs mAh modes

February 7, 2018, 10:42 am

≫ Next: BQ34Z100-G1: 5 LED configuration

≪ Previous: BQ28Z610: I2C broadcast.

Part Number:BQ40Z50-R1

Hi Team,

I have a customer who is using the BQ40Z50-R1 and have an application question between using the mAh mode vs mVh mode they would like to get some insights on:

The product team came up a requirement to use the battery capacity to measure the power used in a certain operation, and use the information to constrain against the same operation in the future. I found there are two battery modes (CAPM (Bit 15): CAPACITY Mode) to configure, the mAh and the mVh. I would imagine the mAh mode is more direct because that is the unit used by the battery manufacturer. However, is the same amount of mAh can be drawn to complete the operation from the battery when it is 100% comparing to 50%? In terms of that concern, I think mVh may be closer to what I need. Am I correct?

I went ahead and tried to change to mVh. I noticed the SoH changed from 88% to 44%. Is there other setup I need to do when changing this configuration?

Thanks in advance for the help and best regards,

Jerry

↧

BQ34Z100-G1: 5 LED configuration

February 7, 2018, 10:45 am

≫ Next: BQ34Z100-G1: NiMH Golden Cycling issue

≪ Previous: BQ40Z50-R1: mVh vs mAh modes

Part Number:BQ34Z100-G1

Hello there,

I am currently trying to figure out how to configure BQ34Z100-G1 on my testboard by using EV2300 with Battery studio. This is my boards schematics:

Now I am trying to turn on the 5 LED config by following the page 38 in the datasheet:

In battery studio I set the LED register as follows:

In the left down corner I get "A read of data failed comparison". I have no idea either it worked or not, because under value I see the register value I entered (is it correct). Also I figure out after whole day of searching that I have old firmware version and in order to update it, I need another EV2300... But is it the case here?

After this setting I press the button but no leds go ON. What could be the reason?

I would appreciate all help, I am really lost after many hours of failed attempts to make this work.

↧

BQ34Z100-G1: NiMH Golden Cycling issue

February 7, 2018, 1:00 pm

≫ Next: BQ27541-G1: Incorrect State of Charge after exit Hibernate Mode

≪ Previous: BQ34Z100-G1: 5 LED configuration

Part Number:BQ34Z100-G1

I am attempting to run a golden cycle a 12S1P NiMH pack.

Here is the summary of our progress:

I used chem ID 2059 because it was the closes to our cell capacity of 2400mAh.

During the cycling the update status changed from 04 to 05 to 06 as it was supposed to.
The MaxError changed from 100% to 3% then to 1%.

However even after 4 cycles the State of Charge goes to 0% when the pack still has about an hour of run time.

Would someone be able help determine the reason for the inaccuracy?

I have all the data through the 4 cycles and a copy of the firmware csv file. But I was not able to attach to this post.

↧

BQ27541-G1: Incorrect State of Charge after exit Hibernate Mode

February 7, 2018, 3:21 pm

≫ Next: BQ34Z100-G1: Custom battery Chemistry

≪ Previous: BQ34Z100-G1: NiMH Golden Cycling issue

Part Number:BQ27541-G1

We have the BQ27541-G1 integrated into a battery pack. We have some packs being stored for more than 1 year without maintenance charge before customer use so they are fully depleted and have entered hibernate mode. After charging (reconditioning) our first read of the SoC is 0% even though the voltage is 4.15V, additional read attempts eventually give 100% SoC. The charger has no I2C communications only V+, GND and thermistor. I have several questions:

1) Is there an I2C command that will force a refresh of the SoC?

2) If no refresh command, how long should we wait after the initial I2C activity (which brings the fuel gauge out of Hibernate) before we have a valid SoC?

3) Any other suggestions on how to get valid SoC information from the fuel gauge upon exit from Hibernate?

↧

BQ34Z100-G1: Custom battery Chemistry

February 7, 2018, 9:26 pm

≫ Next: BQ27542-G1: Using BQ27542 Without temperature sense resistor

≪ Previous: BQ27541-G1: Incorrect State of Charge after exit Hibernate Mode

Part Number:BQ34Z100-G1

Hello there,

I am using Battery Management studio 1.3.80 with BQ34Z100-G1 and EV2300.

I need to work with the following battery types:

Eneloop 1800 mAh
Enersys Cyclon X and Cyclon E

They are not in the BQ studio database. How can I add them manually?

I would appreciate all help.

↧

BQ27542-G1: Using BQ27542 Without temperature sense resistor

February 7, 2018, 9:40 pm

≫ Next: BQ27500: What is the difference between measured voltage and OCV

≪ Previous: BQ34Z100-G1: Custom battery Chemistry

Part Number:BQ27542-G1

Hi,

I am considering using a BQ27542 in a design with a long life LiSoCl2 battery. Is it necessary to use the temperature sense resistor? Will the device function without the temperature sense resistor connected? Is there perhaps an internal thermistor I can use instead of one directly mounted on the battery if we're happy with less accuracy?

Also is this device suitable for this battery chemistry or are there any problems I should know about? I notice that the maximum charge which the device can measure is 14.5Ah. Our battery is larger than this, is it just a matter of resetting the device after we near this capacity?

Thanks,

John.

↧

BQ27500: What is the difference between measured voltage and OCV

February 7, 2018, 8:16 pm

≫ Next: BQSTUDIO: Possible Bug found in logging via GPC Cycle tab- Log file does not overwrite, data lost

≪ Previous: BQ27542-G1: Using BQ27542 Without temperature sense resistor

Part Number:BQ27500

According to Theory and Implementation of Impedance TrackTM Battery Fuel-Gauging Algorithm in bq2750x Family, resistance can be updated by using expressions below:
dV = V - SOC(DOD,T)
R(DOD) = dV/I.

But what is the difference between V and SOC? I thought they are the same.

Thank you very much.

↧

BQSTUDIO: Possible Bug found in logging via GPC Cycle tab- Log file does not overwrite, data lost

February 8, 2018, 2:07 pm

≫ Next: bq27742-g1: Large change in SOC during relax

≪ Previous: BQ27500: What is the difference between measured voltage and OCV

Part Number:BQSTUDIO

Hi there,

I couldn't find a place to submit a bug report, so I guess maybe one of the TI people here can pass this along.

I think I've found a bug in bqStudio when logging in the GPC Cycle tab. What I'm seeing is that when I start a manual GPC Cycle and begin logging, data will log as normal. Cancelling the cycle does not stop the logging process. I'm not sure if that is intended.

What I'm pretty sure is not intended is if I go to start another GPC Cycle after cancelling a prior cycle, I will be prompted to overwrite the existing log file. I choose yes, however the file does not overwrite. The log file remains as-is, and the new log data is not written anywhere. Step by step to reproduce:

1) Open BQStudio and connect to gauge (in my case bq34110).

2) Enter the GPC Cycle window. Select Manual Mode.

3) Output directory is left default (C:\ti\BatteryManagementStudio\OutputFiles)

4) Base File Name is left blank. EDV0 is set to 2900 in my case.

5) Start the GPC Cycle process and begin logging. File name defaults to roomtemp_highrate.log.

6) Cancel the GPC Cycle. Data continues to log to file roomtemp_highrate.log after cancelling the cycle.

7) Start GPC Cycle again, prompt to overwrite appears. Select 'Yes' to overwrite.

8) Data stops logging to roomtemp_highrate.log, but the file is not replaced and no new data is written.

A workaround I've found is to simply log to a new file rather than overwrite the previous one.

I am running Windows 7 x64, bqStudio v1.3.54.1. Let me know if there's any other system information I can provide that might help.

I just lost a discharge cycle log to this, hope you can reproduce so nobody else ends up like me!

↧

bq27742-g1: Large change in SOC during relax

February 8, 2018, 2:13 pm

≫ Next: BQ40Z50: Battery management studio with 32 bit registers such as ManufacturerAccess() 0x0055 Charging status

≪ Previous: BQSTUDIO: Possible Bug found in logging via GPC Cycle tab- Log file does not overwrite, data lost

Part Number:bq27742-g1

Hi,

Chem id 414 LIFEPO4 Battery

Ran learning cycle, no errors tested SOC accuracy 1-2% which is good for my application

But....

after 4-24 hours with just the gauge current draw (Relax)

Full Charge capacity, Filtered FCC, Unfiltered FCC changes from ~2500 to 1400

and the SOC jumps to 1 % even if the cell was at 85% charge

I have been looking into this for 2 weeks now and need some help

It almost appears like there is some kind of negative value calculated.

Thanks

↧

BQ40Z50: Battery management studio with 32 bit registers such as ManufacturerAccess() 0x0055 Charging status

February 8, 2018, 3:56 pm

≫ Next: BQ78350: BQ78350 I am inquiring about the setting of the overcurrent operation.

≪ Previous: bq27742-g1: Large change in SOC during relax

Part Number:BQ40Z50

I'm having difficulty mapping some register view data in BatteryManagment Studio to the information in the technical reference manual

Specifically for ChargingStatus

The technical reference manual (TRM) for the BQ40Z50 (sluua43a.pdf) defines the bit fields this way:

12.1.41 ManufacturerAccess() 0x0055 ChargingStatus

This command returns the ChargingStatus() flags

23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

RSVD RSVD RSVD RSVD RSVD RSVD CCC CVR CCR VCT MCHG IN HV MV LV PV RSVD OT HT STH RT STL LT UT

When I use bqStudio 1.3.54 (with show advanced view mode on) , the "Charging Status" bit register shows CCC as bit 10 and the lower bits for temperature range are not shown at all (see above picture)

In the TRM, the CCC bit is bit 17 and there are temperature range flags in bits 0-6 (which are not shown in bqStudio).

The PV bit ( bit 8 in the TRM ) is mapped to bit 0 in the above image.

It appears the bits were shifted and truncated

Am I misunderstanding the displayed data and its mapping to the TRM?

In other cases the BqStudio 1.3.54 data mapped well with the TRM.

Thanks

John Wright

↧

BQ78350: BQ78350 I am inquiring about the setting of the overcurrent operation.

February 8, 2018, 8:01 pm

≫ Next: BQ27510-G3: bq27510-G3 Golden file

≪ Previous: BQ40Z50: Battery management studio with 32 bit registers such as ManufacturerAccess() 0x0055 Charging status

Part Number:BQ78350

Dear TI,

BQ78350 I am inquiring about the setting of the overcurrent operation.
When setting the overcurrent specification, test the specification by putting the specification in the OCD part of the protection item
Only MAX -32768 will be set for this part.
We are currently asking about how to test 35A, which is about 35A.
As a result of checking the data sheet, it seems that you can set the specifications in the AOLD section.
Please check the difference between RSNS = 0 and RSNS = 1.
Thank you.

↧

BQ27510-G3: bq27510-G3 Golden file

February 8, 2018, 10:26 pm

≫ Next: BQ78350-R1: writing register in "Sealed" mode

≪ Previous: BQ78350: BQ78350 I am inquiring about the setting of the overcurrent operation.

Part Number:BQ27510-G3

Hi,

I have created the Golden file from bqEVSW 0.9.92 and i have to change the Opconfig bit as mentioned above to 8973 (which i have done using bqstudio). Now we have transfer the golden file to production.

Can i use the Bqstudio to create the golden image in .srec format and give it to production or i have to create all the files (.srec, .bq.fs, .df.fs) and load all of them in production line.

Regards

Ravindranath R

↧

BQ78350-R1: writing register in "Sealed" mode

February 8, 2018, 11:26 pm

≫ Next: Linux/BQ34210-Q1: Linux Driver

≪ Previous: BQ27510-G3: bq27510-G3 Golden file

Part Number:BQ78350-R1

Hello,
is it possible to write to registers in sealed mode (SBS Command 0x70)? Customer wants to write some info data into these register. Or is it only possible to acivate first the unsealed mode over the SM bus?

Regards, Holger

↧

Linux/BQ34210-Q1: Linux Driver

February 9, 2018, 7:45 am

≫ Next: BQ27GDK000EVM: bqStudio doesn't recognize the GDK although it does see the included EV2400

≪ Previous: BQ78350-R1: writing register in "Sealed" mode

Part Number:BQ34210-Q1

Tool/software: Linux

Hello,

Is there a Linux driver that would be compatible with bq34210?

Thank you, Keith

↧

BQ27GDK000EVM: bqStudio doesn't recognize the GDK although it does see the included EV2400

February 9, 2018, 10:26 am

≫ Next: BQ40Z60EVM-578: Clarification of discrepancies between documentation and other concerns

≪ Previous: Linux/BQ34210-Q1: Linux Driver

Part Number:BQ27GDK000EVM

Running bqStudio under Windows 7 I'm having a problem accessing the GDK control view (where one can initiate a manual or automatic charge / discharge). Sometimes it works after disconnecting and reconnecting the USB cable but most of the time the GDK icon in the toolbar is missing and that option doesn't appear in the View Menu even though it's enabled in the Perspective. In all cases (GDK icon present or not) the GDK window inside the EV2400 dashboard window is present and the gauge status appears correctly. The gauge itself is an externally connected bq27542-G1.

How do I get the GDK icon to reliably appear in the toolbar and View Menu?

↧

BQ40Z60EVM-578: Clarification of discrepancies between documentation and other concerns

February 9, 2018, 12:23 pm

≫ Next: BQ40Z60: AC Adaptor Voltage jumping frequently

≪ Previous: BQ27GDK000EVM: bqStudio doesn't recognize the GDK although it does see the included EV2400

Part Number:BQ40Z60EVM-578

Hi,

There is a discrepancy between the data sheet and TRM in regards to the current sensing resistor. The data sheet says to use a 1 miliOhm resistor, while the TRM says to not use anything below 5miliOhms. Which one should I go by?

Could you clarify the functionality and operation of the SMBUS?

Also, with concerns about the output capacitor selection, how critical is the lower bound on loop stability frequency? And is the Q4 circuit element necessary?

Thanks

↧