Part Number:BQ2060A
Hello,
I have a 9S2P VHTCS NIMH battery and a BQ2060A, when I charge , I detect the fully charged but when I discharge for the learning, the remaining capacity stop to 233mAh in spite of I have a discharge current during 900s. The fully discharged is not detected.
I join the file configuration and the log.(Please visit the site to view this file)(Please visit the site to view this file)Best regards,
M.MICOU
Part Number:BQ34Z100-G1
Hello everyone,
I am completely new to battery technology so please excuse me if the questions seems broad.
I want to build a device that sets the SOC of a 2s1p LiIon battery to a certain percentage range. Using the BQ34/100-G1 for gauging I am wondering what the easiest charger/load set up would be.
Discharge:
A programmable electronic load seems to be optimal but is quite expensive for my budget. I am guessing a resistor would not be stable enough especially for the learning cycle. Are there any common alternatives?
Charge:
A DC Power Supply seems to be the common choice for charging during the learning cycle. Would you recommend a TI charger circuit over the DC power supply for the learning cycle?
For somebody new in the field the universal battery charge/discharge devices seem like the best choice but reading through the forum I never came across an application using those. Why is that?
Thank you very much!
Part Number:BQ78350-R1
Hello,
I'm quite familiar with other older CEDV gauges, and the capacity synchronization to FCC (with RSOC=100%) at charge termination, by reaching a voltage and current threshold during charge current tapering down.
This feature is handy and always present the battery at 100% to the user.
On studying a new pack based on bq78350-r2 I have difficulty to reach the same sync effect and RSOC does not reach 100%.
I have set CEDV Gauging Configuration in this way:
CCT=1
CSYNC=1
SC=1
And Advanced Charging Algorithm - Termination Config in this way:
Charge Term Taper Current: 40mA (meaning 400mA, because I have IPSCALE0 =1)
Charge Term Voltage = 100mV
With such settings, I expect that when cell voltages are > 4100mV (they have charging voltage = 4200mV), and charging current taper down below 400mA (read as 40mA because of IPSCALE), after 80seconds I have the Valid Charge termination and the capacity synchronization.
This instead does not happen: a pack just reset, showing a RSOC of 84%, with cell voltages around ~4100mV is placed in charge with a simple CCCV charger just set to 4200mV er cell current limited to 3A (the pack is a 7S2P). Cells start charging, current slowly taper down to almost zero, but not FC and TC are set and no RSCO synced to 100%.
What I'm doing wrong ?
I remember other CEDV gauges syncing correctly in such conditions...
Thanks in advance
Pietro
Part Number:BQ78350-R1
Hi all,
I need to change the SMBus frequency of the EV2400 to 10 kHz instead of 100 kHz
I'm using BQ78350 R1 Gas Gauge with BQSTUDIO software
How to change this SMBus Frequency?
Regards,
Loïc
Part Number:BQ34Z100-G1
Hi everybody,
I have a problem with the change of battery to an application where a 12v 7Ah lead-acid battery was used and the bq34z100g1 chip to perform the learning cycle until a Maximum Error of 1% and Learned Status of 6, I got the following problem:
The application starts with a new battery. The results are correct; however, when I change the new battery for an identical but old one, the results are incorrect. I did this change with the objective to see the STATE OF HEALTH value of the old battery, however, this value was always 100%. The old battery I used in this change has 5 years old, so the State of Health value should be a lower one. By looking that the values were incorrect, I proceed to make a charging and discharging cycle so that the values get updated. However, by doing this procedure I realize that the TIME TO EMPTY and TIME TO FULL values were incorrect. They did not match the real time values for charge and discharge.
This test was made after generating a GOLDEN FILE. I would like to know what the problem is.
Thanks for your help
Part Number:BQ27220
Hi,
we are using the BQ27220 together with a Li-Ion battery from Jauch (LP103450JH). Can I use one of the six preprogrammed profiles (described in section 2.1.13 of sluubd4.pdf) with this battery?
Perhaps related, there is a battery identification setting (the lowest 3 bits in the CONTROL_STATUS register). Do i have to set this, and to which value?
Many thanks in advance,
David
Part Number:BQ34Z100-G1
We have been running charge/discharge cycles to test and understand when State of Health is updated, and have noticed an anomaly:
With three back-to back charge cycles, the SoH is updated each time. However, on two of the three cycles, the Full Charge Termination bit (FC bit in Alert Configuration Register ) has not been set. However, in each of the three cycles, OCV taken occurs properly after charge termination. Can you explain why the FC bit would not get set yet a post-charge OCV is obtained?
These are on Lead Acid batteries, 12v AGM with 105ah capacity.Thanks in advance!
Part Number:BQ27750
Hello
I have a newly designed board that is using a BQ27750 Gas gauge Battery management chip. I also have the EV2400 USB -> I2C interface. When connecting the board to the I2C interface i am unable to communicate with a new chip.
My schematics very closely match the schematics that are outlined in the BQ27750EVM (evaluation module) and i have also tried to pull up / pull down the I2C lines (3.3V pull up)
Battery management studio did not have the appropriate .BQZ for the BQ27750 chip. I was able to locate 1750_0_04-bq27750.bqz and added it to the configuration for the program.
I then located: bq27750_b0_04_build_12.srec and tried to flash the chip with this .srec file. The statement at the bottom of battery management studio said: No acknowledge from chip (or something similar)
My team and I are running out of ideas on how to communicate with this chip. Can you please provide me with some input on how to communicate with the BQ27750
Thanks for your time
-Dallin
Part Number:BQ40Z50-R1
Hello.
1. Now I use the BQ40z50-R1， learning charge, but the FC hadn't been set after end of charging. the charge NMOSFET turned off, it stopped charging when the charge current is 1.25A.
There is a Safety states information, it shows the FC could been setted.
Why?
2. Then I tried to close the OC protection, redo again: discharge the battery first, and then charge, Now the FC has been set, the VOK also clear zero.
but now I find the Update Status is still 04, not update to 05.
Why ?
Part Number:BQ40Z80
Dear All:
I want to know what areas the Gas Gauge improve in vacuum cleaner application? Thanks!
Part Number:BQ40Z50-R1
Hello,
For our application, we are making a battery pack with an integrated charger using the bq40z50-R1 and a charger IC communicating over SMBus. There is a particular edge case when the pack is charged to 100%, the TC bit is set but the overcurrent discharge protection gets tripped (without clearing TC). When voltage is applied to the charger circuit, the pack receives the initial pre-charge (~75mA). However, because the TC bit is set and the pack is in charge mode, the TCA bit sets and the alarm shuts down the charger before the OCD condition can clear (8 second recovery delay). Naturally, the TC bit cannot be cleared in this state since discharge is disabled by the OCD protection.
The TCA bit stays high for about 30 seconds and during that time the alarm goes off every 10 seconds. After the initial charger shutdown, if power to the charger is re-connected at the right time, the precharge current can clear OCD before the 10 seconds is up. However, considering that the first application of the charger will always initiate the TCA and fail to clear OCD, having the customer disconnect and reconnect charger power to recover a pack in this state is a less than elegant solution.
There is the option of increasing the Chg Current Threshold to 100mA so precharge will not set the pack to charge mode, but this will affect other protections. An example that I gathered from section 2.8 of the bq40z50-R1 TRM is that the over/under temperature charge protections would not be enabled for the 75mA precharge.
The simultaneous TC and OCD condition seems to be a general issue with the bq40z50 talking with a smart charger over SMBus. Does TI have recommendations on how to address this edge case?
Regards,
Andrew Elgar
Part Number:BQ40Z60
Hi,
We are about to redesign a product using the BQ40z60 device.
Your Website shows now the following:
Special note
Consider BQ40Z50-R2: using a separate charger and a separate gauge like BQ40Z50-R2 might allow more flexibility, ease to design and access to newest firmware.
Apart of this note, the device doesn't show up either under chargers nor fuel gauges - except if searching directly for it.
Is this device not recommended for new designs?
Apart of this, I agree that this device is hard to use and requires lots of external components.
Perhaps there are other charger/gauge combinations which will result in more reliability, lower component count and less board space.
Would it be possible for you to recommend a charge/gauge combination according to my requirements below?
- 2 Li-Ion cells in series (8.4V) not removable. Charger, gauge, and Batteries soldered on PCB.
- Charging current max 600mA via Step-down DC/DC, FETs built-in.
- Automatic cell balancing with built-in FETs.
- Battery capacity max 2000mAh each cell.
- Supply voltage 12V.
- Charge if 12V is applied until Batteries are fully charged - no communication to start or configure charging.
- Discharge rate at up-to 10C or maximum 15A (constant power mode).
- Impedance Track Gauge with I2C or SMB. Prediction of absolute battery capacity and remaining run-time at a specific load would be good.
- Industrial application. It is far more important to provide battery power than to protect the battery. The only reason to turn the battery off should be short circuit or cell voltage < 3V.
- Or-ing of battery and external 12V Power could be done via dedicated Or-ing controllers and FETs. Must switch 15A. System Voltage is allowed to jump between battery voltage and 12V.
Thanks for your help!
Regards,
Fred
Part Number:BQ34Z100-G1
Good morning,
I'm using a BQ34Z100-G1 for monitoring a 1S5P Li-ion battery pack.
Sometimes it happens the SOC value falls to zero, while all other working parameters remain on a correct value (and voltage, for example, is at a value not compatible to SOC=0). When it happens, sometimes after few hours the situation automatically return to correct value, but some other times the SOC remains at 0 and the only way to recover the situation is to disconnect and reconnect the battery (also a reset of BQ34Z100-G1 does not work).
I've read in the post "BQ34z100-g1. SoC Error" the problem can be related to "cell terminate voltage" configuration parameter. I tried to investigate about such a parameter and it could be the cause: increasing such a value, the problem is more frequent, while reducing such a value the problem seems to disappear. Is there any other cause for this SOC=0 issue?
Moreover, how it is possible to force a reset of the SOC estimation algoritm and to let the SOC to restore to the correct value when the SOC=0 situation happens?
Thank you in advance for any support
Best regards
Matteo
Part Number:BQ40Z50
design capacity = 2800mah
qmax has update and see ok, ra table also update, my learning cycle done.
next when i use process, i found when RSOC go 99% the FCC and RC isn't design capacity, why?
Part Number:BQ40Z60
Hi
We created *.srec file with the necessary settings.
How to write from the address 0000x4000 to 0x5FFF is understandable.
The file contains more data. Explain what is written and how to write data on the addresses 0010x0000…0010хDFFF (FFFF) and 0014х0000…0014x01FF
Thanks,
Anatoly
Part Number:BQ27510-G3
Hi,
I am using BQ27510-G3 as fuel gauge. I am trying to modify Data-Flash Parameter using I2C communicaton Programming.. For communicating with Data-Flash I am following steps given in Section 4.6.1- Modify WRTEMP of OpConfig B Register in "Technical Reference Manual" .
Using those steps I am able to read Data-Flash registers value. But, I am unable to write/modify them. I am writing New checksum for new value at address (0x60) .. after that when I attempt to read it back after reset.. I am not seeing new checksum or new modified register value..
So, Is there problem in writing Checksum?
Thank you.
Part Number:EV2300
I´m using BQ Evaluation Software to monitor BQ20Z655, however, I´m trying to automate the production line using LabView 2017, every time I try to load the Bq80xRW Control the software crashes, I installed the customer kit but I can't figure it out if the reason of the crashing is the license file that mentions as bellow (but I don't have such file because I'm still developing the application.
Its necessary to create a license file for any app that you write. This is a simple text file which is placed in the application folder. It must be named the same as the application, but without any extension. In the file, you place the number of bytes in the application. That can be found from right-clicking the application and looking at the properties for the size. It usually looks something like this:
size: 880 KB (901,120 bytes)
The text to put in the license file would be 901120 (no commas allowed).
To ensure that it works on all machines please make sure of the following
1. For a file called "Sample.exe", right click and select properties. Note the size in bytes of this file.
2. Open notepad and type in the size in bytes(without commas). Save this file as "Sample.txt"
3. Rename "Sample.txt" to "Sample"
4. Distribute "Sample" with "Sample.exe"(both files must be in the same directory)
5. Install the bqEVSW on the machine on which you wish to run Sample.exe