Bq78pl116 short circuit Test

Mohit Chopra

Other Parts Discussed in Thread: BQ78PL116

Hello! I am having project of the battery 48V/20A with Gas gauging IC Bq78pl116 .I have done all the calibration on the board, but the problem lies in the short circuit test.For short circuiting I used a rod of resistence 75 m-ohm & also the cells internal resistence is also 75m-ohm. So probably when I short circuited the battery the current of 500A goes through for micro-seconds. After that test HSC Flag do not turned on however Fuse got turned on. So I decided to disconnect the cells from the EVM board & try to reconnect it, But however there is problem occured in the cell balancing circuitry & it shows shorting betwwen two cells connections on the Board. So is this the short circuit test which was done on the EVM be the reason for damaging the Board? Help me out in getting rid of this problem.

Regards,

Mohit

over 13 years ago

0 ThomasCosby over 13 years ago

TI__Guru 73830 points

Mohit,

Was is the indicator that there in a short between two cells? Does the device report a cell voltage of 2000 mV for both cells? If so, the PL116 device may be damaged. Can you send a screen shot or log file that shows the problem?

Regards

Tom

0 Mohit Chopra over 13 years ago in reply to ThomasCosby

Intellectual 830 points

Tom,

I am attaching pack parameters for the 12S/9P battery configuration.Kindly help me.

[System Parameters]
<SBData Dynamic>
Pack Voltage	49698	mV
Current	1	mA
Average Current	2	mA
Temperature	26.7	°C
Absolute State of Charge	11	%
Relative State of Charge	11	%
Full Charge Capacity	19800	mAh
Remaining Capacity	2207	mAh
Run Time To Empty	65535	Minutes
Average Time To Empty	65535	Minutes
Average Time To Full	65535	Minutes
Battery Status	0x0080
Cycle Count	0	Cycles
Max Error	10	%

<SBData Static>
Manufacturer Access	0x55AA
Manufacturer Name	Sealed	Energy	Systems
Device Name	bq78PL116
Device Chemistry	Li-Ion	2200mAhr
Manufacturer Data	0E4D616E20446174612020202020200000000000000000000000000000000000
Serial Number	1
Manufacture Date	########
Specification Info	0x0031
Design Voltage	43200	mV
Design Capacity	19800	mAh
Charging Voltage	50400	mV
Charging Current	10000	mA
Battery Mode	0x6001
Remaining Time Alarm	10	Minutes
Remaining Capacity Alarm	480	mAh

<Pack Dynamic>
Board Temperature	26.7	°C
Pack Passed Current	0	mAh
Cycle Since Learn	0
Epoch Hour	0
FET Status	0x00F7
Safety Alert	0x0000
Safety Status	0x0000
Safety Alert1	0x0000
Safety Status1	0x0000
Permanent Disable Alert	0x0000
Permanent Disable Status	0x0000
Charge Alert	0x0000
Charge Status	0x0000
Number of Rebuilds	66
Number of Polls	710
Number of Poll Errors	63

<Charge Control>
Pre-Charge Temperature	0	°C
Pre-Charge Voltage	2800	mV
Pre-Charge Recovery	3000	mV
Pre-Charge Current	2400	mA
Charge Inhibit Temperature Low	-20	°C
Charge Inhibit Temperature High	65	°C
Charge Inhibit Recovery Temperature Low	0	°C
Charge Inhibit Recovery Temperature High	45	°C
Charge Suspend Temperature Low	0	°C
Charge Suspend Recovery Temperature Low	5	°C
Charge Suspend Temperature High	45	°C
Charge Suspend Recovery Temperature High	40	°C
Charge Completion Pack Voltage Qualifier	49800	mV
Charge Completion Taper Current Qualifier	1000	mA
Charge Completion Time	4	Seconds	RDTE
Charge Completion FET Activation Time	0	Seconds	RDTE
Discharge Completion Pack Voltage Qualifier	40800	mV
Discharge Completion Time	4	Seconds	RDTE
Discharge Completion FET Activation Time	0	Seconds	RDTE
Discharge Under Temperature	-20	°C
Discharge Under Temperature Recovery	10	°C
Discharge Under Temperature Time	6	Seconds	RDTE
FC Set SOC Threshold	-1	%
FC Clear SOC Threshold	-1	%
FD Set SOC Threshold	-1	%
FD Clear SOC Threshold	-1	%
FD Set Voltage	40800	mV
FD Clear Voltage	42000	mV
FD Set Voltage Time	0	Seconds
Transition to Idle Current	50	mA
Transition to Idle Time	30	Seconds
Transition to Discharge Current	-75	mA
Transition to Charge Current	75	mA
Design Capacity mAh	19800	mAh
Design Capacity 10mWh	95040	mWh
TDA Set SOC Threshold	-1	%
TDA Set Voltage Threshold	9600	mV
TDA Set Voltage Time	2	Seconds
TDA Clear SOC Threshold	-1	%
TDA Clear Voltage	42000	mV
TCA Set SOC Threshold	-1	%
TCA Clear SOC Threshold	-1	%
OCA Set Voltage	50280	mV
OCA Activation Time	2	Seconds	RDTE

<Pack History>
Lifetime Minimum Pack Voltage	32767	mV
Lifetime Maximum Pack Voltage	49700	mV
Lifetime Minimum Cell Voltage	4132	mV
Lifetime Maximum Cell Voltage	4146	mV
Lifetime Maximum Charge Current	13	mA
Lifetime Maximum Discharge Current	-5	mA
Lifetime Delivered Amp Hours	0	Ah
Last Discharge Average	-3960	mA
Lifetime Minimum Temperature	26.6	°C
Lifetime Maximum Temperature	26.7	°C
Lifetime Maximum Power	0	Watts

<Cell Balancing>
Cell 1 Net Pump	0	Pumps
Cell 2 Net Pump	0	Pumps
Cell 3 Net Pump	0	Pumps
Cell 4 Net Pump	0	Pumps
Cell 5 Net Pump	0	Pumps
Cell 6 Net Pump	0	Pumps
Cell 7 Net Pump	0	Pumps
Cell 8 Net Pump	0	Pumps
Cell 9 Net Pump	0	Pumps
Cell 10 Net Pump	0	Pumps
Cell 11 Net Pump	0	Pumps
Cell 12 Net Pump	0	Pumps
Cell 13 Net Pump	0	Pumps
Cell 14 Net Pump	0	Pumps
Cell 15 Net Pump	0	Pumps
Cell 16 Net Pump	0	Pumps
Minimum Cell Differential For Balancing	25	mV

<Cell Chemistry>
Chemistry ID	100
Aux Chemistry Version	0
Tau10	225
Normalized Dynamic Impedance Low Temperature	20	°C
Normalized Dynamic Impedance High Temperature	40	°C
Normalized Dynamic Impedance SOC	15	%
Normalized Dynamic Impedance Gain	32
FCC Learn Qualifier	30	%
Cycle Fade	0.05	%
Min OCV Slope	2	mV	per	%	RSOC
OCV Idle Qualifier	60	Minutes
Stale FCC Timeout	2880	Minutes
Default Charging Voltage	50400	mV
Default Charging Current	10000	mA
Capacity Algorithm	0x0003
User Rate	480	mA
Current Delta	100	mA

<Pack Configuration>
Hardware Configuration	0x0731
Algorithm Enable	0x000E
System Control	0x8000
Parallel Count	9
Expected Number of Cells	12
Actual Number of Cells	12
Max Number of Cells	16
Temperature Sensor Count	1
Max Number of Temperatures	5
Sense Resistor	10000	uOhms
EPD Refresh Period	10	Minutes
EPD Pump Time	120	Cycle	Counts
EPD Write Time	70	Cycle	Counts
Display Driver Frequency	30	Hz
FW Build	719
Firmware Version	6000
Access Level	2

<Safety Level 1>
COV Threshold	4250	mV
COV Recovery	4000	mV
COV High Temperature Threshold	4250	mV
COV High Temperature Adjust	50	°C
COV Time	2	Seconds
CUV Threshold	3300	mV
CUV Recovery	3500	mV
CUV Time	2	Seconds
POV Threshold	52800	mV
POV Recovery	48000	mV
POV Time	3	Seconds
PUV Threshold	38400	mV
PUV Recovery	42000	mV
PUV Time	3	Seconds
EUV Threshold	2700	mV
EUV Time	3	Seconds
EUV Recovery	3300	mV
OC Charge Tier 1 Threshold	12000	mA
OC Charge Tier 1 Recovery	10	Seconds
OC Charge Tier 1 Time	2	Seconds
OC Discharge Tier 1 Threshold	-20000	mA
OC Discharge Tier 1 Recovery	10	Seconds
OC Discharge Tier 1 Time	2	Seconds
OC Charge Tier 2 Threshold	13000	mA
OC Charge Tier 2 Recovery	10	Seconds
OC Charge Tier 2 Time	2	Seconds
OC Discharge Tier 2 Threshold	-23000	mA
OC Discharge Tier 2 Recovery	10	Seconds
OC Discharge Tier 2 Time	2	Seconds
OC Max Attempts	3
Hardware OC Charge Threshold	51
Hardware OC Charge Recovery	10	Seconds
Hardware OC Charge Time	50
Hardware OC Discharge Threshold	205
Hardware OC Discharge Recovery	10	Seconds
Hardware OC Discharge Time	50
HOC Max Attempts	3
Hardware Short Circuit Threshold	62
Hardware Short Circuit Recovery	10	Seconds
Hardware Short Circuit Time	5
HSC Max Attempts	0
OT Charge Threshold	50	°C
OT Charge Recovery	45	°C
OT Charge Time	2	Seconds	RDTE
OT Discharge Threshold	60	°C
OT Discharge Recovery	50	°C
OT Discharge Time	2	Seconds	RDTE
Board Over Temperature	85	°C
Board Over Temperature Recovery	65	°C
Board Over Temperature Time	2	Seconds	RDTE
Hardware LP Discharge Threshold	205
Hardware LP Discharge Duration	50
Hardware LP Charge Threshold	51
Hardware LP Charge Duration	50
Host Watchdog Timeout	0	Seconds	RDTE

<Safety Level 2>
SOV Threshold	4500	mV
SOV Time	8	Seconds	RDTE
Cell Imbalance Current	50	mA
Cell Imbalance Fail Voltage	500	mV
Cell Imbalance Time	180	Seconds
Cell Imbalance SOC Inhibit Threshold	30	%
SOC Charge Threshold	32767	mA
SOC Charge Time	2	Seconds	RDTE
SOC Discharge Threshold	-32768	mA
SOC Discharge Time	2	Seconds	RDTE
SOT Charge Threshold	70	°C
SOT Charge Time	2	Seconds	RDTE
SOT Discharge Threshold	70	°C
SOT Discharge Time	2	Seconds	RDTE
Open Temperature Sensor Threshold	0	°C
Open Temperature Sensor Time	2	Seconds	RDTE
FET Fail Time	2	Seconds	RDTE
Fuse Fail Limit	100	mA
Fuse Fail Time	0	Seconds	RDTE
VLAN Fail Time	4	Seconds	RDTE
Current Measurement Fail Time	100	Seconds	RDTE
Pre-Charge Voltage Timeout	1000	Seconds	RDTE
Charge Duration Timeout	14400	Seconds	RDTE
IGR Limit	200
IGR Fail Count	0
IGR Ratio Limit	120
IGR Ratio Fail Count	255
Rate Limit Threshold	200
Rate Limit Activation Count	0

<Passwords>
Level 1
Level 2

<Calibration>
Current Gain	31294
Coulomb Gain	31401

[Cell Parameters]
[Cell 1]

<Dynamic>
Cell Voltage	4132	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4132	mV
Cell Status	0x0000

<History>
Cell SOC	95
OCV SOC	3	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	3	%

<Learned>
HF Impedance	45	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	273	mOhms
QMax	2400	mAh
QRemaining	2280	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	454	mOhms
Ra8	496	mOhms
Ra9	518	mOhms
Ra10	633	mOhms
Ra11	725	mOhms
Ra12	994	mOhms
Ra13	2564	mOhms
Ra14	6121	mOhms

[Cell 2]

<Dynamic>
Cell Voltage	4140	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4140	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	2	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	2	%

<Learned>
HF Impedance	45	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	263	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	445	mOhms
Ra8	484	mOhms
Ra9	504	mOhms
Ra10	612	mOhms
Ra11	723	mOhms
Ra12	990	mOhms
Ra13	2489	mOhms
Ra14	5936	mOhms

[Cell 3]

<Dynamic>
Cell Voltage	4145	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4145	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	4	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	4	%

<Learned>
HF Impedance	50	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	291	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	469	mOhms
Ra8	514	mOhms
Ra9	541	mOhms
Ra10	666	mOhms
Ra11	724	mOhms
Ra12	992	mOhms
Ra13	2684	mOhms
Ra14	6418	mOhms

[Cell 4]

<Dynamic>
Cell Voltage	4144	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4144	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	3	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	3	%

<Learned>
HF Impedance	61	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	284	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	463	mOhms
Ra8	507	mOhms
Ra9	532	mOhms
Ra10	652	mOhms
Ra11	724	mOhms
Ra12	992	mOhms
Ra13	2636	mOhms
Ra14	6299	mOhms

[Cell 5]

<Dynamic>
Cell Voltage	4146	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4146	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	3	%
Stale FCC Estimate	25	Minutes
Passed mAh	0	mAh
SOC Snapshot	3	%

<Learned>
HF Impedance	19	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	56	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 6]

<Dynamic>
Cell Voltage	4141	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4141	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	6	%
Stale FCC Estimate	25	Minutes
Passed mAh	0	mAh
SOC Snapshot	6	%

<Learned>
HF Impedance	16	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	58	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 7]

<Dynamic>
Cell Voltage	4137	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4137	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	0	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	0	%

<Learned>
HF Impedance	21	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	60	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 8]

<Dynamic>
Cell Voltage	4143	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4143	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	0	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	0	%

<Learned>
HF Impedance	21	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	60	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 9]

<Dynamic>
Cell Voltage	4144	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4144	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	0	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	0	%

<Learned>
HF Impedance	22	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	60	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 10]

<Dynamic>
Cell Voltage	4140	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4140	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	0	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	0	%

<Learned>
HF Impedance	22	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	60	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 11]

<Dynamic>
Cell Voltage	4141	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4142	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	0	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	0	%

<Learned>
HF Impedance	25	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	60	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

[Cell 12]

<Dynamic>
Cell Voltage	4145	mV
Cell Temperature	26.7	°C
Temperature Rise	0	°C/Min
Net Pumping	0
Est. OCV	4145	mV
Cell Status	0x0000

<History>
Cell SOC	96
OCV SOC	0	%
Stale FCC Estimate	6	Minutes
Passed mAh	0	mAh
SOC Snapshot	0	%

<Learned>
HF Impedance	21	mOhms
Default Normalized Dynamic Impedance	60	mOhms
Normalized Dynamic Impedance	60	mOhms
QMax	2400	mAh
QRemaining	2304	mAh
Rzero	0	mOhms
Unused	0
Ra0	245	mOhms
Ra1	253	mOhms
Ra2	290	mOhms
Ra3	395	mOhms
Ra4	241	mOhms
Ra5	230	mOhms
Ra6	269	mOhms
Ra7	275	mOhms
Ra8	272	mOhms
Ra9	236	mOhms
Ra10	228	mOhms
Ra11	241	mOhms
Ra12	330	mOhms
Ra13	1101	mOhms
Ra14	2501	mOhms

Regards,

Mohit

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Bq78pl116 short circuit Test