Part Number:BQ34Z100-G1
Hi,
My customer ask why the FCC value not equal to there battery test machine.
The machine report capacity is 13.7mAH but bq34z100-g1 FCC is 13.25mAH.
The gauge update status is 0x06, cycle count is 2. This test not for learning cycle
and did not have relax time. I want to know why FCC was deviate the machine,
whether the test method is wrong.
Thanks
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Part Number:BQ34Z100
My customer has an Intrinsically Safe design (must protect all charge storage components - like capacitors - from excessive current flow).
2 Questions related to this:
1) Customer has a 470ohm series resistor on the REGIN node, but this seems to cause problems with the bq34z100 fuel gauge. The gauge seems to not want to start-up properly. (seems to power cycle). Why? Is there a maximum series impedance allowed on the REGIN pin? The customer's application requires a series impedance to 'protect' the input capacitor.
2) There is a concern that a fault current from GND can back-drive through the SDA & SCL output pins (though the Open Drain output FET body diodes) back to the host processor. The EVM also has the D1 diode - which would conduct in a similar manner... Any suggestions on protecting the SDA & SCL nodes? one partial answer would include e knowing the maximum series impedance we can put on the I2C lines - and perhaps remove D2 (on the EVM). Adding a series FET-clamp might be another possible option
Third question: Can the bq34z100 read-back state of charge during a charging cycle? i.e. if the pack is being charged - can we use the bq34z100 to monitor the level of charge while it is charging - for an added level of safety. And perhaps stop the charging process if the pack is near or exceeding what is determined to be a full charge level. We are looking at both Li+ and NiMH cells.
Thanks!
Part Number:BQ40Z50-R2
Hi All :
I have a question about bq40z50-r2 as below.
The new function of bq40z50-r2 has charging current degradation by cycle count /SOH.
Could charging current degradation be set to only active for temperature range(15~45 deg C) ?
Example :
1. When cycle count lower than 50 and charge current set to 0.7C during 15~45 degC.
2. When cycle count over than 50 and charge current return to 0.5C during 15~45 degC.
Thanks.
Part Number:BQ34110EVM-796
Hi,
I am working on bq34110EVM-796. I have gone through two different scenarios.
1. I have connected bq34110EVM-796. to PC throughout EV2300. In this case, the device is not detected in a software tool.
2. I have connected bq34110EVM-796 to processor throughout I2C line. in this case, also bq34110EVM-796 is not detected as a slave device to the processor.
I have probed REG25 and REFIN pins and CE pin and it shows voltages as per datasheet.
Please suggest some points on this.
Thanks,
Viken.
Part Number:BQ27510
Hi all,
We are using BQ27510 as battery monitor in one of our designs.
We are using EV2300 for communicating with the BQ27510 for initial development.
Initially everything worked as expected & we were able to read proper voltage & current from the battery monitor.
During initial configuration, by mistake IT_Enable command was sent & after this the battery charging / discharging current is not accurate even after the calibration.
Battery monitor shows 140mA charging current even when there is no load / charger connected to the system. Any load or charging current is added on top of this 140mA.
It seems like there is a offset error of 140mA & this is not corrected even after CC offset / Gain or Charging current calibration.
We tried Reset command to reset the entire battery Monitor & also uploaded the default firmware.
But above things have not resolved the issue.
I have attached the .gg file for your reference.
Please suggest the possible reasons / ways to resolve this issue.
Looking forward to valuable suggestions.
/cfs-file/__key/communityserver-discussions-components-files/180/Data_5F00_Flash.gg.zip
Thanks,
Suresha
Part Number:BQ34Z100-G1
Fuel gauge = BQ34Z100-G1
Battery Pack = 2x 5000mAh Li-Ion cells in series.
In our system the fuel gauge is host side.
It is powered through a diode-or of the DC-jack and battery pack.
If the fuel gauge is powered before a battery pack is applied then the State of Charge returns as 0%.
Battery voltage and current return the correct values.
The 0% state of charge is reported even after an hour of charging the battery pack, with the pack voltage at 8.4V (i.e. 100%)
If the reset command 0x0041 is sent to the gauge, then the 0% is immediatly replaced with the correct state of charge.
My questions are:
1. Please could you confirm this is a bug/feature in the silicon, and not a problem with our register settings.
2. Please advise what the impact of issuing a reset command is on the system. (i.e. could we just reset the chip if we boot and see 0% SOC?)
3. We don't currently enable impedance tracking. Roughly speaking do you have a figure for the typical improvement in accuracy observed if this feature is enabled? Our system is 2x 5000mAh Li-Ion cells in series.
4. If Impedance tracking is enabled. What impact would issuing reset command have on this?
Hopefully you can help out on the above.
Thanks.
Part Number:BQ27510-G3
Hi,
Please let me ask about Max % Default Qmax because there is not enough explanation in TRM. I guess that it will be used to calculate default Qmax with following equation.
Default Qmax = DesignCapacity x Max % Default Qmax
Is my understanding correct?
Best Regards,
Satoshi / Japan Disty
Part Number:BQ27426
Hi Team,
we are in a position where we need to overwrite the Ra tables on the BQ27426 on ocassion. We understand the flashstream format and know how to write the values. What we're confused about is if we are generating the checksum properly and then, where to write it.
We did review SLUA801 and found the following code:
//check_sum: calculate check sum for block transfer
//pData: pointer to data block
//nLength: length of data block
unsigned char check_sum(unsigned char *pData, unsigned char nLength)
{
unsigned char nSum = 0x00;
unsigned char n;
for (n = 0; n < nLength; n++)
nSum += pData[n];
nSum = 0xFF - nSum;
return nSum;
}
1) Is this the correct procedure for calculating the checksum?
2) Where should this value be written - again if the block transfer is for Ra table?
Thanks,
Sal
Part Number:BQ27441-G1
Dear,
My concern is about bq27441.
Is it compatible with Li-Po Battery?
What are the restrictions if I utilize a Li-po battery instead of a Li-Ion?
Regards,
Part Number:BQ34110
I am trying to use bqStudio to configure the bq34110EVM-796 to which I have attached an UltraLife battery pack. That pack has 2 Lithium Ion batteries in series. The voltage of the pack is 7.2V rated at 2.4Ah. Using SLUUBI1 (bq34110EVM-796) to configure the number of cells and do a voltage calibration I go to section 3.2.1 "For packs where the stack voltage is > 5V" and execute the 5 bullets points. When I then go to the Calibration section of bqStudio and place "7930" (that is the measure voltage at J7) into the Applied voltage entry box, click "Calibration Voltage" then click "Calibrate Gas Gauge" a red message appears at the bottom left corner :
Calibration - Client waited for more than 3 seconds for pipe.
I have no idea what that means.
Our application needs nothing fancy from the bq34110. All we need is SOC value. This particular design will charge and discharge the battery on a regular basis.
Part Number:BQ78PL116
Hi DMax,
Per Tech_Reference, bq78PL116 Extended SBData can be accessed via SMBus. However, when tried to read Safety Status (0x51), we cannot get correct value, while all other registers from 0x3c to 0x58 look ok. In addition to use bqWizard or API, is there any special way to read Safety Status register?
Thanks
Jeffrey
Part Number:BQ27742-G1
Hi,
we are using the device and want to know what mode the device is in after connecting a power or battery to it? based on the spec, it probably is in the analog shutdown mode, isn't it?
we know that in this case the CHG/DSG FETs are OFF. in order to turn them ON, a charger has to be attached after connecting a power.
But in our application battery may be disconnected momentarily and requires recovery without charger involved. we wonder that there is a way to turn the FETs ON without a charger attached to after applying a power?
Thanks!
Mike
Part Number:BQ27750
Hi
We using BQ27750 with 1cell application .
We have very simple question for 0x0A Battery Status ,
This Status including Bit 7: INIT—Initialization .
[ Question ]
a) What purpose this Bit 7: INIT—Initialization of 0x0A Battery Status ??
b) This Bit 7: INIT—Initialization has 2 state .
0 = Inactive
1 = Active
When is this status used for?
For Instance
After Data Flash Programming and device initialization status ?
This mean, Srec or DFFS write and this INIT Status change to 0 to 1 .
The Device Initialize is Complete....... etc
Because of this our device Battery Status INIT Status is always " 1 ".
Is it correct ??
Regard
March Jasper ( Sugimoto )
Part Number:BQ40Z50-R1
Hi Sir,
could you please confirm the MAC command to get chemical ID is correct or not? since the chemical ID is different from what vendor provided. thank you.
Best regards,
Langston Chang
Part Number:BQ27510-G2
I am connecting this bq27510-G2 device with renesas sk-s7g2 board. I need a C source code for this battery guage device.. Can you please provide me ?
Part Number:BQ27750
Hi
Now we using BQ27750 with Battery and tested Battery Dis Charge condition.
But we found some issues, our Battery has internal Protector with Under voltage.
If this internal Protector work , Battery output dis connect when Charge start.
We check this Charge condition with BQ27750 with Charger BQ24072.
Bur Charge function dose not work with BQ27750.
[ Question ]
If battery has very depth discharge and became to Low Voltage ( Under 2.0 ) ,
Dose we have way for Pre Charge Plan when this situation ??
Pack pin connected to same as EVM, but we did not start Charge ,
Dose we need something change setting resister ??
Regard
March Jasper ( Sugimoto )
Part Number:BQ35100
Hi team,
I'm using BQStudio Vers.1.3.54.1 and EV2300 Vers.3.1m.
When trying to program Chemistry ID 0615 (EV_ER34615) error code 1713 appears.
(selected Chemistry ID not found in extended chemistry file)
I have updated the chemistry file from version 599 to 643 without success in programming
the ID but with a new error message 1484 (error code unkown and not translated)
The same procedure with EV2400 Vers. 0.18....
Another point is, that I do not understand why in the Chemistry Programming Screen
secondary cells are displayed, too. I there not a filter for possible ID's by choosing the gauge?
pls help..
Regardes
Hans
Part Number:BQ78Z100
I can read Standard Data Commands successfully. But when I try to use AltManufacturerAccess block data commands, the IC does not response. I wonder whether there is a begin prosedure to use that commands or something? Further information about my code is available in case of necessity.
Thank you.
Part Number:BQ78350-R1
I need to measure currents of up to 100A,but IPScale-ing not working. when current>32A,Whether the RemainingCapacity() is right?
when current>32A,I hope calculate current through SBS Command AFEData,but it's fail.I get AFEVCx using the same way.Is it not allowed to get AFEData?
Part Number:BQ27510-G2
Provide me code for BQ27510-G2