Part Number:BQ20Z65-R1
Hello,
Although the part is in Full Access mode, I can't clear the PF flags unless I have the PF Key (two words). Can anyone provide me with this "hidden" key? Looks like there is kind of a secret, same kind as for the Unseal/full Access key...
Thanks.
Matthieu.
Part Number:bq34z100-g1
Hi,
My earlier conversations about the bq34Z100-G1 seem to have disappeared.
I have a query about the Design Energy Scale setting in the bq34Z100-G1:
Our 7S 11P Li-ion battery has a design charge capacity of about 35Ah and an energy capacity of about 1,000,000 mWh (1kWh). For the designed discharge current capability I have put a factor of 2 in the current calibration, i.e. a real discharge current of 60A is read as 30A by the fuel gauge. With this factor, the energy in the battery seen by the fuel gauge is therefore 500,000 mWh. This is of course too high for the various energy parameters that are limited to 32767, so I need to put in a further factor, and I understand this is what the Design Energy Scale is for.
The question is what are the permissible numbers that Design Energy Scale can be set to? Section 7.3.6.5 in the data sheet (SLUSBZ5B) says "between 1 and 10 only", and Table 11 shows a range of 0 to 255. Ideally we would like a factor of 16 or 20.
I am reluctant to alter the current sense calibration from a factor 2 to 4 (which would bring the Design Energy Scale within the range 1 to 10) because we would lose resolution on the amp hour capacity calculations.
I should be grateful for your comments, in particular what are the permissible values for Design Energy Scale?
Many thanks in advance,
Alan Ogburn
Part Number:BQ27542-G1
If at the end of learning cycle Update Status is 0x06, but VOK is still set, is it correct learning cycle or not? Ra0 table have been updated and Ra flag value is 0x0055.
Part Number:BQ34Z100
Good day,
i have a design using BQ34Z100 gauging a single cell.
Problem1: the cell have no "Pack-"pin,i dont no how to connect the pin "SRN" and "SRP".
Problem2:The pin"VEN" state is always high,thats ok?If not,what i would do?And PCB have no enough space for another Button as the example from BQ34Z100g1 datasheet pag
thanks
Part Number:BQ27421-G1
Hi, I have a support thread on the Linux forum for this issue, but the TI representative has directed me to this forum to handle one aspect of the problem I'm having.
First, I'll provide some background. We are running Linaro 4.4.9 with the PREEMPT RT patch on the Variscite SD410 SOM. We have connected the bq27421-g1 to the SOM and verified functionality with i2cdetect and i2cget commands. We installed the bq27xxx_battery driver, and initially it did not work. After applying these two patches: marc.info/ and patchwork.kernel.org/.../, it works in the aspect that it creates and updates the filesystem under /sys/class/power_supply, but it exhibits problem that makes SOM unusable.
Here's the problem. Something the driver does causes the syslog to constantly overflow. This behavior begins the instant we load the driver and it stops the instant we unload the driver. The only dmesg entry available in the syslog contains the following, repeatedly;
[ 144.049378] systemd-journald[1489]: /dev/kmsg buffer overrun, some messages lost.
The TI rep handling this on the Linux form said the following. I'm just taking the most relevant excerpts.
Looks like, bq27xxx_battery_irq_handler_thread() - interrupt is occurring continuously which calls bq27xxx_battery_update() -> power_supply_changed() calls this uevent
Yeah it is updating the battery values way too often. May be the fuel gauge and battery needs some kind of calibration(which I am not sure about).
I am taking guess. But there is a flow [flaw] in code to tell if battery is calibrated or not.
Here's a link to the entire support thread: e2e.ti.com/.../2168095
Can TI provide guidance for eliminating this problem?
Thanks,
Brian
Part Number:BQ34Z100-G1
Hi,
We made a 10s 4p battery pack which inside is ICR18650-26H cells manufactured by SDI. The datasheet is attached. The Chem ID chosen by the TI's system according to the log file is 242, and the deviation is above 3%. I think this Chem ID maybe is not suitable for our battery pack. So we try the steps to calculate the Chem ID again, and the result is all the same. Please guide me to find the way to improve the accuracy of the Chem ID. Thanks!
(Please visit the site to view this file)
Part Number:bq78350
Hi Sir,
For geting Gauging Parameter Calculator report, I uploaded all needed data to TI website, but I got an error report as follow:
Error: Computation was not successful, but the specific reason was not identified.
Please check that all files are prepared according to the documentation.
The support personnel have been informed
I have followed all instruction from user guide, is there anything wrong in my documents?
Thank you.
Part Number:BQ34Z100-G1
In my .df.fs file, a few lines have very long write, for example below is one line of the df.fs file:
W: 16 00 02 00 00 00 EA FF 33 B1 FA 33 6C FB 33 95 FE 33 AD FE 33 FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F FF FF 3F 16 00 3F 58 CB 33 C3 00 08 11 00 00 00 00 00 FF AA 0E FB A7 0E FF A6 0E FF A1 0E FF A0 0E FE A3 0E 61 A2 0E DE FF 3A 65 FF 3A E2 FF 33 FF AF 0E
which means
WRITE: to device address 0x16 at register 0x00 the data sequence above.
As you can see, the data sequence is rather long. Now if I would like to break the above sequence into smaller chunks, what should I do?
Should I just keep writing to register address 0x00? Or I have to increment register 0x00 accordingly based only how much data I have been writing?
Usually, I can break any long I2C write into smaller chunks and increment the register address accordingly, but I am not sure how the BQ34Z100 will
handle this in ROM mode.
Thanks.
Part Number:bq20z45-R1
Hello,
I am working with a Battery pack vendor who is starting up a new production flow for a custom battery pack we designed, using the bq20z45-R1.
We’re puzzled about the Calibration process for this fuel gauge. The TI literature suggests that you need to provide an external,
accurate voltage source and current source to calibrate each gauge. I don’t understand how to do this process. Looking around the TI
website, there are some oblique references to tools called “BQTester” and “BQMTester.” There’s also an “Advanced BQM Tester”.
Is it required to have one of these tools in order to properly calibrate custom battery packs on a production line?
Please let me know, if you can point me to how the typical calibration process works at a battery pack vendor, and what equipment is needed,
it would be really helpful.
Thanks,
Mohan
Part Number:BQ34Z100-G1
Hello,
I use BQ34Z100 and BQ78350 and I would like to know if there is an ID for the following reference:
PANASONIC NCR-18650GA
I do not find it in the list of different chemistry references but maybe since that reference was created.
If not, how can I proceed since I do not use mathcad?
Thanks in advance.
Regards.
Part Number:BQ27742-G1
Hi Team,
Is the advanced bqMTester compatible with BQ27742-G1? It is not shown on the compatibility list. If not, is there a similar tool available for this gauge?
Thanks,
Antonio
Part Number:BQ27520-G4
Hi Team,
TRM shows the following about Battery Profile Selection.
In terms of the red line above, how does bq27520-G4 decide an existing pack is removed?
Could you tell the condition?
Best Regards,
Yaita / Japan disty
Part Number:BQ78350-R1
I want to unseal the BQ78350-R1 manually,
First, I Read the Seal key with the flowed steps:
1、use the Bqstudio cmd UNSEAL_FULL_ACCESS on the rigth side of Bqstuido
2、 then，write cmd 0x0035 to manufacturedAccess 0x00
3、read the key from ManufacturedData，
4、 now I got the unseal key shoud be 0x1404 0x7236
Second, I want to use the key to unseal the BQ78350-R1
1、I send cmd 0x0030 to manufactured 0x00 to seal the bq78350-R1
2、According to the BQ78350-R1 TRM chapter 11.5.2 SEALED to UNSEALED on Page74:
Unsealing is a two-step command performed by writing the first word of the unseal key to ManufacturerAccess() (MAC), followed by the second word of the unseal key to ManufacturerAccess().
I send the 0x1404 to ManufactureAccess(0x44),then send 0x7236 to ManufactureAccess(0x44)，
I try to change the data sequence
change the sequence by 36 72 04 14
change the sequence by 72 36 14 04
None of the above is correct.
How the Unseal the BQ78350-R1
Part Number:BQ78350-R1
I want to unseal the BQ78350-R1 manually,
First, I Read the Seal key with the flowed steps:
1、use the Bqstudio cmd UNSEAL_FULL_ACCESS on the rigth side of Bqstuido
2、 then，write cmd 0x0035 to manufacturedAccess 0x00
3、read the key from ManufacturedData，
4、 now I got the unseal key shoud be 0x1404 0x7236
Second, I want to use the key to unseal the BQ78350-R1
1、I send cmd 0x0030 to manufactured 0x00 to seal the bq78350-R1
2、According to the BQ78350-R1 TRM chapter 11.5.2 SEALED to UNSEALED on Page74:
Unsealing is a two-step command performed by writing the first word of the unseal key to ManufacturerAccess() (MAC), followed by the second word of the unseal key to ManufacturerAccess().
I send the 0x1404 to ManufactureAccess(0x44),then send 0x7236 to ManufactureAccess(0x44)，
I try to change the data sequence
change the sequence by 36 72 04 14
change the sequence by 72 36 14 04
None of the above is correct.
How the Unseal the BQ78350-R1
Try write the key to 0x00
(Please visit the site to view this file)
Part Number:BQ27546-G1
Hi,
I currently used BQ27546-G1 in my device. At the moment, the device can fully charged at 100% SOC. Chem_ID 0105 (LiCoO2/carbon-3) is set up correctly with charging voltage 4.2V. Battery capacity is 165mAh. I am currently using BQstudio and EV2300.
However, I got the situation like this:
- If I still leave the device in the charger after fully charged for more than 48 hours, I can see the SOC read reduces slow. For examples, cell voltage at 4.167V SOC read 98%; cell voltage at 4.152V SOC read 97%; 4.141V SOC read 95%; 4.118V SOC read 93%. Until the battery voltage drops down to 4.1V, then charger will trigger the recharge process to top up the battery cell voltage and it will reach 100% again at 4.194V.
As i know the battery is leak out as fuel gauge consumes the energy from battery cell so it can take a few days before battery voltage reach down to 4.1V.
My question : Is SOC read correctly ? Can I improve this situation as sometimes it may confuse the user ?
Thank you very much.
Hello All,
I have a set up, where the EV2300 communicates with the battery's BMS, and bqEVSW communicates with the EV2300. This provides the computer with bqEVSW a log of the charge status, etc. In most cases it works well, but occasionally I get a computer which will not communicate with the EV2300 via USB. The computers are identical (same board, BIOS image, flash drive image, etc.). If a computer does not communicate with the EV2300, said EV2300 will still communicate with a test laptop. Additionally, invariably the computers will still take another USB device, such as a mouse or memory stick. I've ensured there's no difference in bqEVSW software versions (0.09 on the splash screen and bq34z100R1 v0.06 -v0.07 when no communication- on the top bar). USB versions are the same. Operating systems are the same. What could be causing this? Is there a way to ensured firmware within the EV2300 is the same? That's the only thing I can think of which might be different (but keep in mind that in such a situation, the EV2300 will still communicate with a test laptop, so the firmware issue seems a bi of a long shot).
Any thoughts would be gratefully received.
Kind Regards,
JB
Part Number:BQ40Z60
I'm looking for a cheapest way to interface and program BQ40Z60 in a way that EV2300 would. As Thumbus™-2300-SMB costs half as much as EV2300 I would like to know if I can achieve the same performance: program, perform learning cycles, etc. Has anyone tried this device for this particular purpose and can verify it is suitable for it or not?
Part Number:BQ27441-G1
Hi,
This may be basic question but let me ask for my understanding. Please let me know the minimum measurable current when 10mohm sense resistor is used. I think that it can be calculated by the resolution of Integrating ADC (Coulomb Counter).
Best Regards,
Satoshi / Japan Disty
Part Number:BQ40Z50-R1
Hi,
Please let me ask about the current measurement accuracy after calibration. Can we say it rough value like within +/- 1%?
Best Regards,
Satoshi / Japan Disty
