We have the HP495 calibration board but cannot find the multistation setup software 2.00, mentioned in the user's guide SLUU397A.

http://focus.ti.com/docs/toolsw/folders/print/advanced-bqmtester.html

All we can find is the older 1.06B setup elsewhere.

We already have drivers installed for the EV2300 to talk to our target chips with the EV software.  Do we need to reload drivers?  Can we even avoid reloading drivers when the multistation setup runs?   Will it break our existing operations with the EV software?

Ken

Hi,

I'm currently working on a project that uses the fuel gauge IC mentioned in the subject for our battery management circuit.

The problem that I noticed in our current setup is that every time the bq24040 battery charger IC terminates charging (CHG pin goes to HI-Z), the fuel gauge seem to always fall short in terms of reporting a 100% SOC on the battery and only reports 93% 95% on a full charge.

I made sure that I have properly configured in firmware the bq27421-G1A's basic battery parameters according to the battery that I am using which has a capacity of 180mAh:

Design Capacity = 180mAh

Design Energy = 666

Terminate Voltage = 3V

Taper Rate = 202 (based on a taper current of 8.9mA)

The weird thing though is that if I use the same firmware that handles the configuration of the bq27421-G1A using the BQ27421EVM-G1A and BQ24040EVM evaluation boards and duplicate the battery management circuit of our system by adjusting the trimmer potentiometers and configuring jumpers of the evaluation boards to match our setup, the bq27421-G1A chip of the BQ27421EVM-G1A will always report a correct 100% SOC (using the same re-chargeable battery) between the time when the bq24040 chip of the BQ24040EVM is tapering up to the time it terminates charging which is what I was hoping for our setup to also behave.

The only difference that I noticed with our setup is that the bq27421-G1A's VDD pin was left floating (no 0.47uF capacitor connected between it and the VSS).

I don't have a good background in hardware design (i.e. I am only mostly involved in embedded software design) so I don't know if the missing decoupling capacitor in the fuel gauge's VDD pin has something to do with this problem or if there is some other factor causing the bq27421-G1A's SOC in our setup to always fall short of reporting a 100% charge during a full charge condition.

I would appreciate it if anyone will be able to help me figure out what's causing this problem.

Thanks.

--Louise

I have  designed a bms with A cell balancer Bq77910a and a Bq34z100. The bq77910 works en communicates perfect.

a The Bq34z100 does not communicates at all. Only the two first two led's are lit up a very little bit . In the program i am receive a no acknowledge message . 

So. there is something wrong whit the communication ., or maybe a supply problem ?

In the user guide there are many schematics which all uses  a zener diode in series with a  resistor . the connection between zener diode and resistor is connected to a 2n2007 Mosfet which is use to supply power to the chip.

In the remark of the schematic is suggested that you have to alter this series resistor to adjust the current to the chip. 

In the Evm schematic in the user-guide the chip supply has to 2n200t Mosfet in parallel  whit the serie resistor split up in two resistor. This is suggesting that more current is needed.

In all other sample schematics there is only one 2n7002 mosfet with a zener and series resistor. 

Can some one tell me how i can dimension the chips power supply in a way the chip can works at its specs.

I have used a zener with the standard resistor . But the 2.5 Volts from the LDO is not stable and it goes up and down from 2.31. to 2.52. Volts

I will use 8  cells Lithium Fer cells.  

Anyone that has suggestions to get this working please respond to this questions.

Many thanks in advantage for your reaction.

Dear Expert,

I confuse that BQ24381 OCP protection will always turn off internal MOSFET or just when power on short occur ?

As this timing chart red circle , OCP event but output voltage still appear .....

Thanks !

Hello,

Can anybody provide programing specification - specification how to store customer's data to memory? We need implement programming on our device programmers.

Thank you in advance.

Frantisek

Hi all,

i am looking for bq27510-G3 Technical Reference Manual. The link's (sluua97) in bq27510-G3 Datasheet  doesnt work.

Where to find it ?

thanks

Alexander

Hi Team,

In the P26 of datasheet, it state that we need to wait minimum 2 seconds for read-write standard command. Is this wait time applied for Extended Command?

Copy from P26.

"For read-write standard command, a minimum of 2 seconds is required to get the result updated."

Best Regards,

Sonoki / Japan Disty

I have some questions before learning(Optimization) cycle.

Our Application: 4 Batteries(12V 155Ah,US 12VXC) in series =>48V

Charge Current :20.8A

Discharge Current : 0C~3C(0A~465A)

I follow SLUSB55B P.29, Step 5

Load Select:1

Load Select:0

Cell Terminate Voltage: 10200mV ( Maximum:5000mV) ,How to do?

Quit Current : ? , suggest number?

Qmax Cell 0: 155000/10=>15500 , Because Calibrate Current use 1/10 real current

So, Before learning cycle only 5 parameters to Set just OK?

Dear Sir:

       I used bq27200 in my product. My Battery Capacity is 18,000 mAh .

I  checked datasheet ： 6000 mAh is  mamimum of bq27200 .  Can it work with my Battery？

     By the way, for bq27200, Battery Capacity (Min)  is the same as Battery Capacity (Max) , Why?.

     I wish someone help me,

Howard

Hello,

I'm wondering that BQ30Z554 is pin2pin compatible with BQ30Z55?

Our battery provider use BQ30Z55 in next battery package.

But I cannot find detail information about BQ30Z55.

Please help.

B/R

Hi Friend,

I met a issue is bq30z55 V0.36 Ra table not update after did full learning, but the RU and Gauge function are enable, follow is the GG file, could you please help to command what the problem is? Whether there is something wrong in setting? Thanks.

Suren

[Header]

bq EVSW Version = 0.9.90 

DeviceName = bq30z55R3 v0.36

Time = 2013/12/25 ¤U¤È 03:59:38

[State(Gas Gauging)]

Qmax Cell 0 = 2304

Qmax Cell 1 = 2308

Qmax Cell 2 = 2309

Qmax Cell 3 = 2200

Qmax Pack = 2304

Update Status = 06

Cell 0 Chg Voltage at EoC = 4200

Cell 1 Chg Voltage at EoC = 4200

Cell 2 Chg Voltage at EoC = 4201

Cell 3 Chg Voltage at EoC = 0

Current at EoC = 92

Avg I Last Run = -503

Avg P Last Run = -553

Delta Voltage = 2

Max Avg I Last Run = -505

Max Avg P Last Run = -625

[IT Cfg(Gas Gauging)]

Load Select = 7

Load Mode = 0

Ra Filter = 50.0

Ra Max Delta = 15

Design Resistance = 97

Reference Grid = 4

Resistance Parameter Filter = 65142

Term Voltage = 9000

Term Voltage Delta = 300

User Rate-mA = 0

User Rate-cW = 0

Reserve Cap-mAh = 30

Reserve Cap-cWh = 0

Remcap Smoothing Filter = 250

Fast Scale Start SOC = 10

[Current Thresholds(Gas Gauging)]

Dsg Current Threshold = 100

Chg Current Threshold = 50

Quit Current = 10

[R_a0(Ra Table)]

Cell0 R_a flag = 0055

Cell0 R_a 0 = 87

Cell0 R_a 1 = 101

Cell0 R_a 2 = 105

Cell0 R_a 3 = 130

Cell0 R_a 4 = 88

Cell0 R_a 5 = 101

Cell0 R_a 6 = 116

Cell0 R_a 7 = 112

Cell0 R_a 8 = 120

Cell0 R_a 9 = 114

Cell0 R_a 10 = 102

Cell0 R_a 11 = 131

Cell0 R_a 12 = 214

Cell0 R_a 13 = 483

Cell0 R_a 14 = 934

[R_a1(Ra Table)]

Cell1 R_a flag = 0055

Cell1 R_a 0 = 78

Cell1 R_a 1 = 92

Cell1 R_a 2 = 99

Cell1 R_a 3 = 125

Cell1 R_a 4 = 84

Cell1 R_a 5 = 97

Cell1 R_a 6 = 113

Cell1 R_a 7 = 107

Cell1 R_a 8 = 115

Cell1 R_a 9 = 111

Cell1 R_a 10 = 99

Cell1 R_a 11 = 127

Cell1 R_a 12 = 211

Cell1 R_a 13 = 501

Cell1 R_a 14 = 970

[R_a2(Ra Table)]

Cell2 R_a flag = 0055

Cell2 R_a 0 = 87

Cell2 R_a 1 = 101

Cell2 R_a 2 = 106

Cell2 R_a 3 = 132

Cell2 R_a 4 = 90

Cell2 R_a 5 = 103

Cell2 R_a 6 = 119

Cell2 R_a 7 = 115

Cell2 R_a 8 = 122

Cell2 R_a 9 = 117

Cell2 R_a 10 = 104

Cell2 R_a 11 = 134

Cell2 R_a 12 = 219

Cell2 R_a 13 = 515

Cell2 R_a 14 = 993

[R_a3(Ra Table)]

Cell3 R_a flag = FF55

Cell3 R_a 0 = 72

Cell3 R_a 1 = 84

Cell3 R_a 2 = 96

Cell3 R_a 3 = 166

Cell3 R_a 4 = 99

Cell3 R_a 5 = 104

Cell3 R_a 6 = 138

Cell3 R_a 7 = 95

Cell3 R_a 8 = 87

Cell3 R_a 9 = 92

Cell3 R_a 10 = 107

Cell3 R_a 11 = 136

Cell3 R_a 12 = 209

Cell3 R_a 13 = 522

Cell3 R_a 14 = 1009

[R_a0x(Ra Table)]

xCell0 R_a flag = 0000

xCell0 R_a 0 = 87

xCell0 R_a 1 = 101

xCell0 R_a 2 = 105

xCell0 R_a 3 = 130

xCell0 R_a 4 = 88

xCell0 R_a 5 = 101

xCell0 R_a 6 = 116

xCell0 R_a 7 = 112

xCell0 R_a 8 = 120

xCell0 R_a 9 = 114

xCell0 R_a 10 = 102

xCell0 R_a 11 = 131

xCell0 R_a 12 = 214

xCell0 R_a 13 = 498

xCell0 R_a 14 = 963

[R_a1x(Ra Table)]

xCell1 R_a flag = 0000

xCell1 R_a 0 = 78

xCell1 R_a 1 = 92

xCell1 R_a 2 = 99

xCell1 R_a 3 = 125

xCell1 R_a 4 = 84

xCell1 R_a 5 = 97

xCell1 R_a 6 = 113

xCell1 R_a 7 = 107

xCell1 R_a 8 = 115

xCell1 R_a 9 = 111

xCell1 R_a 10 = 99

xCell1 R_a 11 = 127

xCell1 R_a 12 = 211

xCell1 R_a 13 = 516

xCell1 R_a 14 = 999

[R_a2x(Ra Table)]

xCell2 R_a flag = 0000

xCell2 R_a 0 = 87

xCell2 R_a 1 = 101

xCell2 R_a 2 = 106

xCell2 R_a 3 = 132

xCell2 R_a 4 = 90

xCell2 R_a 5 = 103

xCell2 R_a 6 = 119

xCell2 R_a 7 = 115

xCell2 R_a 8 = 122

xCell2 R_a 9 = 117

xCell2 R_a 10 = 104

xCell2 R_a 11 = 134

xCell2 R_a 12 = 219

xCell2 R_a 13 = 530

xCell2 R_a 14 = 1022

[R_a3x(Ra Table)]

xCell3 R_a flag = FFFF

xCell3 R_a 0 = 72

xCell3 R_a 1 = 84

xCell3 R_a 2 = 96

xCell3 R_a 3 = 166

xCell3 R_a 4 = 99

xCell3 R_a 5 = 104

xCell3 R_a 6 = 138

xCell3 R_a 7 = 95

xCell3 R_a 8 = 87

xCell3 R_a 9 = 92

xCell3 R_a 10 = 107

xCell3 R_a 11 = 136

xCell3 R_a 12 = 209

xCell3 R_a 13 = 522

xCell3 R_a 14 = 1009

[Manufacturer Data(System Data)]

ManufacturerInfo =

[Integrity(System Data)]

Data Flash Checksum = 0000

[Data(SBS Configuration)]

Remaining AH Cap. Alarm = 220

Remaining WH Cap. Alarm = 244

Remaining Time Alarm = 10

Initial Battery Mode = 0081

Design Voltage = 11100

Specification Information =

Manufacture Date = 21-Dec-2013

Serial Number = 0001

Cycle Count = 2

Cycle Count Percentage = 80

Max Error Limit = 100

Design Capacity mAh = 2200

Design Capacity cWh = 2442

Manufacturer Name =

Device Name =

Device Chemistry = LION

[FD(SBS Configuration)]

Set Voltage Threshold = 3000

Clear Voltage Threshold = 3100

Set % RSOC Threshold = 0

Clear % RSOC Threshold = 5

[FC(SBS Configuration)]

Set Voltage Threshold = 4200

Clear Voltage Threshold = 4100

Set % RSOC Threshold = 100

Clear % RSOC Threshold = 95

[TDA(SBS Configuration)]

Set Voltage Threshold = 3200

Clear Voltage Threshold = 3300

Set % RSOC Threshold = 10

Clear % RSOC Treshold = 15

[TCA(SBS Configuration)]

Set Voltage Threshold = 4200

Clear Voltage Threshold = 4100

Set % RSOC Threshold = 100

Clear % RSOC Threshold = 95

[Max Error(SBS Configuration)]

Time Cycle Equivalent = 24

Cycle Delta = 0.05

[CUV(Protections)]

Threshold = 2700

Delay = 2

Recovery = 3000

[CUVC(Protections)]

Threshold = 2900

Delay = 0

Recovery = 3000

[COV(Protections)]

Threshold Low Temp = 4250

Threshold Standard Temp = 4250

Threshold High Temp = 4250

Threshold Rec Temp = 4250

Delay = 2

Recovery Low Temp = 4100

Recovery Standard Temp = 4100

Recovery High Temp = 4100

Recovery Rec Temp = 4100

[OCC1(Protections)]

Threshold = 3000

Delay = 2

[OCC2(Protections)]

Threshold = 8000

Delay = 0

[OCC(Protections)]

Recovery Threshold = 0

Recovery Delay = 30

[OCD1(Protections)]

Threshold = -4000

Delay = 45

[OCD2(Protections)]

Threshold = -8000

Delay = 0

[OCD(Protections)]

Recovery Threshold = 0

Recovery Delay = 30

[OLD(Protections)]

Threshold = 03

Delay = 07

Latch Limit = 0

Counter Dec Delay = 10

Recovery = 30

Reset = 15

[SCC(Protections)]

Threshold = 22

Latch Limit = 0

Counter Dec Delay = 10

Recovery = 30

Reset = 15

[SCD1(Protections)]

Threshold = 82

[SCD2(Protections)]

Threshold = E7

[SCD(Protections)]

Latch Limit = 0

Counter Dec Delay = 10

Recovery = 30

Reset = 15

[OTC(Protections)]

Threshold = 65.0

Delay = 3

Recovery = 45.0

[OTD(Protections)]

Threshold = 75.0

Delay = 3

Recovery = 55.0

[OTF(Protections)]

Threshold = 80.0

Delay = 0

Recovery = 65.0

[HWD(Protections)]

Delay = 10

[PTO(Protections)]

Charge Threshold = 2000

Suspend Threshold = 1800

Delay = 18000

Reset = 2

[CTO(Protections)]

Charge Threshold = 2500

Suspend Threshold = 2000

Delay = 54000

Reset = 2

[OC(Protections)]

Threshold = 300

Recovery = 2

RSOC Recovery = 90

[CHGV(Protections)]

Threshold = 500

Delay = 30

Recovery = -500

[CHGC(Protections)]

Threshold = 500

Delay = 2

Recovery = 100

[CUV(Permanent Fail)]

Threshold = 2000

Delay = 5

[COV(Permanent Fail)]

Threshold = 4400

Delay = 10

[CUDEP(Permanent Fail)]

Threshold = 2500

Delay = 0

[OTCE(Permanent Fail)]

Threshold = 80.0

Delay = 10

[OTF(Permanent Fail)]

Threshold = 100.0

Delay = 0

[QIM(Permanent Fail)]

Delta Threshold = 2200

Delay = 2

[CB(Permanent Fail)]

Max Threshold = 240

Delta Threshold = 40

Delay = 2

[VIMR(Permanent Fail)]

Check Voltage = 3700

Check Current = 20

Delta Threshold = 200

Delta Delay = 30

Duration = 100

[VIMA(Permanent Fail)]

Check Voltage = 3700

Check Current = 50

Delta Threshold = 300

Delay = 2

[IMP(Permanent Fail)]

Delta Threshold = 300

Max Threshold = 400

Ra Update Counts = 2

[CD(Permanent Fail)]

Threshold = 0

Delay = 2

[CFET(Permanent Fail)]

OFF Threshold = 20

OFF Delay = 2

[DFET(Permanent Fail)]

OFF Threshold = -20

OFF Delay = 2

[TH(Permanent Fail)]

ADC Delay = 10

[FUSE(Permanent Fail)]

Threshold = 20

Delay = 2

[AFER(Permanent Fail)]

Threshold = 100

Delay Period = 2

Compare Period = 5

[AFEC(Permanent Fail)]

Threshold = 100

Delay Period = 5

[2LVL(Permanent Fail)]

Delay = 2

[OCECO(Permanent Fail)]

Threshold = 5000

Delay = 2

[Device Status Data(PF Status)]

Safety Alert 0-15 = 0000

Safety Status 0-15 = 0000

PF Alert 0-15 = 0000

PF Status 0-15 = 0000

Safety Alert 16-31 = 0000

Safety Status 16-31 = 0000

PF Alert 16-31 = 0000

PF Status 16-31 = 0000

Operation Status 0-15 = 0000

Operation Status 16-31 = 0000

Charging Status 0-15 = 0000

Charging Status 16-23 = 00

Gauging Status = 0000

[Device Voltage Data(PF Status)]

Cell Voltage 0 = 0

Cell Voltage 1 = 0

Cell Voltage 2 = 0

Cell Voltage 3 = 0

Battery Direct Voltage = 0

Pack Voltage = 0

[Device Current Data(PF Status)]

Current = 0

[Device Temperature Data(PF Status)]

Internal Temperature = -273.2

External 1 Temperature = -273.2

External 2 Temperature = -273.2

[Device Gauging Data(PF Status)]

Cell0 Dod0 = 0

Cell1 Dod0 = 0

Cell2 Dod0 = 0

Cell3 Dod0 = 0

Passed Charge = 0

[AFE Regs(PF Status)]

AFE Status = 00

AFE State Control = 00

AFE Control = 00

AFE Output Status = 00

AFE Function Control = 00

AFE Cell Select = 00

AFE OCDV = 00

AFE OCDT = 00

AFE SCC = 00

AFE SCD1 = 00

AFE SCD2 = 00

AFE REF TRIM = 00

[Safety Status(Black Box)]

1st Status Status 0-15 = 0000

1st Safety Status 16-31 = 0000

1st Time to Next Event = 0

2nd Safety Status 0-15 = 0000

2nd Safety Status 16-31 = 0000

2nd Time to Next Event = 0

3rd Safety Status 0-15 = 0000

3rd Safety Status 16-31 = 0000

3rd Time to Next Event = 0

[PF Status(Black Box)]

1st PF Status 0-15 = 0000

1st PF Status 16-31 = 0000

1st Time to Next Event = 0

2nd PF Status 0-15 = 0000

2nd PF Status 16-31 = 0000

2nd Time to Next Event = 0

3rd PF Status 0-15 = 0000

3rd PF Status 16-31 = 0000

3rd Time to Next Event = 0

[Voltage(Lifetimes)]

Max Cell Voltage 0 = 3620

Max Cell Voltage 1 = 3620

Max Cell Voltage 2 = 3620

Max Cell Voltage 3 = 0

Min Cell Voltage 0 = 3620

Min Cell Voltage 1 = 3620

Min Cell Voltage 2 = 3620

Min Cell Voltage 3 = 0

Max Delta Cell Voltage = 0

[Current(Lifetimes)]

Max Charge Current = 0

Max Discharge Current = 0

Max Avg Dsg Current = 0

Max Avg Dsg Power = 0

[Safety Events(Lifetimes)]

No Of Cov Events = 0

Last Cov Event = 0

No Of Cuv Events = 0

Last Cuv Event = 0

No Of Ocd1 Events = 0

Last Ocd1 Event = 0

No Of Ocd2 Events = 0

Last Ocd2 Event = 0

No Of Occ1 Events = 0

Last Occ1 Event = 0

No Of Occ2 Events = 0

Last Occ2 Event = 0

No Of Old Events = 0

Last Old Event = 0

No Of Scd Events = 0

Last Scd Event = 0

No Of Scc Events = 0

Last Scc Event = 0

No Of Otc Events = 0

Last Otc Event = 0

No Of Otd Events = 0

Last Otd Event = 0

No Of Otf Events = 0

Last Otf Event = 0

[Charging Events(Lifetimes)]

No Valid Charge Term = 0

Last Valid Charge Term = 0

[Gauging Events(Lifetimes)]

No Of Qmax Updates = 0

Last Qmax Update = 0

No Of Ra Updates = 0

Last Ra Update = 0

No Of Ra Disable = 0

Last Ra Disable = 0

[Power Events(Lifetimes)]

No Of Shutdowns = 0

[Cell Balancing(Lifetimes)]

Cb Time Cell 0 = 0

Cb Time Cell 1 = 0

Cb Time Cell 2 = 0

Cb Time Cell 3 = 0

[Temperature(Lifetimes)]

Max Temp Cell = 16

Min Temp Cell = 15

Max Delta Cell Temp = 78

Max Temp Int Sensor = 17

Min Temp Int Sensor = 15

Max Temp Fet = 0

[Time(Lifetimes)]

Total Fw Runtime = 30

Time Spent In UT = 0

Time Spent In LT = 0

Time Spent In STL = 30

Time Spent In RT = 0

Time Spent In STH = 0

Time Spent In HT = 0

Time Spent In OT = 0

[Fuse(Settings)]

PF Fuse 0-15 = 0013

PF Fuse 16-31 = 0003

Min Blow Fuse Voltage = 6000

[Manufacturing(Settings)]

Manufacturing Status = 01FE

[Protection(Settings)]

Enabled Protections 0-15 = 3557

Enabled Protections 16-31 = 0000

[Permanent Failure(Settings)]

Enabled PF 0-15 = 0013

Enabled PF 16-31 = 0003

[Configuration(Settings)]

Protection Configuration = 02

Temperature Configuration = 0402

Charging Configuration = 5D

System Configuration = 0226

Gauging Configuration = 000F

Sbs Configuration = 20

Sbs Data Config. 0-15 = 0CCC

Sbs Data Config. 16-23 = CC

[AFE(Settings)]

AFE State Control = 10

[Power(Power)]

Valid Update Voltage = 7500

[Shutdown(Power)]

Shutdown Voltage = 2500

Shutdown Time = 10

PF Shutdown Voltage = 2500

PF Shutdown Time = 10

Charger Present Threshold = 3000

[Sleep(Power)]

Sleep Current = 10

Voltage Time = 5

Current Time = 20

Wake = 00

[Ship(Power)]

Delay = 5

[Temperature Ranges(Advanced Charge Algorithm)]

T1 Temp = 0

T2 Temp = 10

T5 Temp = 20

T6 Temp = 30

T3 Temp = 45

T4 Temp = 55

Hysteresis Temp = 1

[Low Temp Charging(Advanced Charge Algorithm)]

Voltage = 4200

Current Low = 220

Current Med = 220

Current High = 220

[Standard Temp Charging(Advanced Charge Algorithm)]

Voltage = 4200

Current Low = 1100

Current Med = 1100

Current High = 1100

[High Temp Charging(Advanced Charge Algorithm)]

Voltage = 4200

Current Low = 1100

Current Med = 1100

Current High = 1100

[Rec Temp Charging(Advanced Charge Algorithm)]

Voltage = 4200

Current Low = 1100

Current Med = 1100

Current High = 100

[Pre-Charging(Advanced Charge Algorithm)]

Current = 220

[Maintenance Charging(Advanced Charge Algorithm)]

Current = 44

[Voltage Range(Advanced Charge Algorithm)]

Charging Voltage Low = 2500

Charging Voltage Med = 3600

Charging Voltage High = 4000

Charging Voltage Hysteresis = 0

[Termination Config(Advanced Charge Algorithm)]

Charge Term Taper Current = 110

Charge Term Voltage = 130

[Cell Balancing Config(Advanced Charge Algorithm)]

Bal Time/mAh Cell 0 = 367

Bal Time/mAh Cell 1-3 = 514

Min Start Balance Delta = 3

Relax Balance Interval = 18000

Min Rsoc for Balancing = 80

[Charging Rate of Change(Advanced Charge Algorithm)]

Current Rate = 1

Voltage Rate = 1

[Charge Loss Compensation(Advanced Charge Algorithm)]

CCC Current Threshold = 3520

CCC Voltage Threshold = 4200

[Voltage(Calibration)]

Cell Scale 0 = 20538

Cell Scale 1 = 20579

Cell Scale 2 = 20647

Cell Scale 3 = 20517

Pack Gain = 53136

BAT Gain = 49147

[Current(Calibration)]

CC Gain = 1.85

Capacity Gain = 551701

[Current Offset(Calibration)]

CC Offset = -7338

Coulomb Counter Offset Samples = 64

Board Offset = 0

[Temperature(Calibration)]

Internal Temp Offset = 4.4

External1 Temp Offset = -3.7

External2 Temp Offset = -2.9

[Internal Temp Model(Calibration)]

Int Coeff 1 = 0

Int Coeff 2 = 0

Int Coeff 3 = -11136

Int Coeff 4 = 5754

Int Minimum AD = 0

Int Maximum Temp = 5754

[Cell Temperature Model(Calibration)]

Coeff a1 = -14520

Coeff a2 = 23696

Coeff a3 = -20298

Coeff a4 = 28073

Coeff a5 = 865

Coeff b1 = -694

Coeff b2 = 1326

Coeff b3 = -3880

Coeff b4 = 5127

Rc0 = 11703

Adc0 = 11703

Rpad = 0

Rint = 0

[Fet Temperature Model(Calibration)]

Coeff a1 = -14520

Coeff a2 = 23696

Coeff a3 = -20298

Coeff a4 = 28073

Coeff a5 = 865

Coeff b1 = -694

Coeff b2 = 1326

Coeff b3 = -3880

Coeff b4 = 5127

Rc0 = 11703

Adc0 = 11703

Rpad = 0

Rint = 0

[Filter(Calibration)]

Cell Voltage 1 = 145

Cell Voltage 2 = 145

Cell Voltage 3 = 145

Cell Voltage 4 = 145

Pack Voltage Out = 10

Direct Battery Voltage = 10

Summed Battery Voltage = 145

Cell Temperature = 145

FET Temperature = 145

[Current Deadband(Calibration)]

Deadband = 5

Coulomb Counter Deadband = 34

Hai,

I did the learning cycles and I got the golden .DFI through the evaluation software. I needed to clarify one thing , I gave the  Design Capacity to be 5800 mAH (by two 2900mAH NCR18650A cells in parallel),now during  the learning cycle I could see the update status going 1 and 2 and the Qmax values came to be somewhat above 6000 mAH and in dataRAM too I could see the full charge capacity as above 6000mAH but after going through updating golden pack process the Qmax values came back to 5800 and the capacity indications in dataRAM also came out to around 5800 like 5732 mAH.

So I wanted to confirm whether there is any sort of error in my learning Cycle….

(Please visit the site to view this file)

Hello,

I am trying to generate an aux file for a battery pack with the bq78pl116 fuel gauge. I completed the discharge/charge cycle as described in the chemistry selection document (SLUA505B) using the log feature in bqWizard, but when I run the aux file utility, it comes up with errors and is unable to complete the file generation. The log file and the aux error screen are attached.

Pack specifications are as follows:

- Boston power swing 5300 cells in 5s1p configuration (chemistry file# 1134 programmed)

- Cell balancing not used in this application.

- sense resistor used is 1mOhm, so the /10 scaling factor is enabled.

I appreciate any help. Thank you,

Maciek

Where could I find more information about the use of the GNDSEL bit in the bq27501? In the specification SLUS879A - June 2009 I find I think some confusing information.

In chapter 5.3.1 I can read : GNDSEL = ADC ground selection control. The Vss (Pin 6) is selected as the ground referenced when the bit is clear. Pin 7 is selected when the bit is set. Default = 1.

In chpater 4.6 DATA FLASH SUMMARY I can read: Operation Configuration Default Value 0x0979.

This tells that bit GNDSEL = 0 by default.

What is correct? What is the real use of GNDSEL?

Hi,

I've a problem with the calibration of my battery with the BQ34Z100PW.

My battery specs:
26.4V
12 Ah
 316.8Wh

The problem is my capacity in the data ram isn't the same as the design capacity I programmed to the BQ34Z100PW.
I thought when I use the learning cycle, the capacity will change.
But  when I start the learn cycle the VOK bit is still high after 3 hours.
I followed this document http://www.ti.com/lit/an/slua334b/slua334b.pdf.
The charge current is 4A and I discharge with 2.4A.

Also I need to use the  X10, because I need to fill in 316.8Wh.
What is the effect for the other settings of the X10. 
Because when I read page 19 of the datasheet I can't find which settings are scaled. 

I look forward for the answers on my questions.

I have just do BQ3050 test on my own test board , the schemic is copy from BQ3050evm schemic.

The REG33 has voltage about 3.28 , but REG25 has no voltage. 

When pres,"DISP", the LED does not display.

Could the chip been damaged? or other possiblies?

Thanks.

Hi,

We want to monitor single Pb-acid cells (2V) and zeroed in on the bq34z110 IC, but I see that it's starting voltage is mentioned as 4V! Is there no way to use it to monitor 2V cells?

Regards,

Anup

What heating or environmental characteristics would need to be guaranteed in order to exceed the BQ27421-G1 recommended sense resistor input current of 2000 mA I_SRX?  Suppose the desired input current was 4500 mA.  How would this affect the ambient operating temperature as one variable?  For example, instead of being rated for -40 °C to 85 °C, T_A might need to be limited to 50 °C (or some other value).  Alternatively in order to maintain a T_A of 85 °C, then the circuit board must have a heat sink big enough to ensure that the measured package temperature does not exceed xx °C.  With these guidelines, customers would be able to safely evaluate how to increase the long term RMS, average device utilization without riskng device damage.

Does the fact that the bq27425-G2 has a 10 mOhm resistor give any increased tolerance for the long term RMS, average device utilization current for the BQ27421-G1 with just 7 mOhm?  For example, since P = I²R, then 2390 mA through a 7 mOhm resistor is the same amount of power as 2000 mA through a 10 mOhm resistor.

Hi,

I have been experimenting with the bq34z100 Eval Module.

I have removed the onboard 0.01 ohm sensing resistor and replaced it with an external 50 mv/500A shunt (0.1 mOhms). I am having some issues with calibration and I am think that the issue is that the full scale voltage on the sense input is too small (data sheet recommends a max of 0.8v).

A couple of questions:

1. How accurate are the ADCs on the current input?
2. Can I externally multiple the inputs by 10x to use up more of the ADCs range?
3. or Is there an internal multiplier that I can set?
4. Is it even possible to set the device up to measure > 327.6 A?

Hello,

I currently work with the softwares BqMtester and the circuit  Bq20z95

When calibrating the BqMtester has sealed the circuit.

Now what is normal, I can not read data from flash memory:

 I would like to unseal the circuit.

I followed the instructions from the PDF on page 214 SLUA404 SHA. But I can not understand what command must be sent to unseal the circuit.

Thank you for your help