[参考译文] BQ76942：BQ76952

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Other Parts Discussed in Thread: BQSTUDIO, BQ76942

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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1352553/bq76942-bq76952

器件型号：BQ76942
主题中讨论的其他器件：BQSTUDIO

基本上、我使用0.5m Ω 的分流电阻器计算电流、直到30A 电流值才准确读取、但在此值之后、读取的电流值显示出的电流值比提供的电流要小。例如、如果我提供50A 的电流、则其显示为37A、以此类推。这可能是什么原因以及如何解决它。

1 年多前

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Kunal、

您使用什么是0.5m Ω 分流电阻器的校准程序？

如果您使用电流测量分流电阻器上的压降、它是否与预期结果匹配？

此致、

路易斯·埃尔南德斯·萨洛蒙

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

* Field Order: Class name	 Subclass name	 Parameter name	 Parameter Value	 Display Units
Calibration	Voltage	Cell 1 Gain	12119	â€”
Calibration	Voltage	Cell 2 Gain	12119	â€”
Calibration	Voltage	Cell 3 Gain	12119	â€”
Calibration	Voltage	Cell 4 Gain	12119	â€”
Calibration	Voltage	Cell 5 Gain	12121	â€”
Calibration	Voltage	Cell 6 Gain	12121	â€”
Calibration	Voltage	Cell 7 Gain	12121	â€”
Calibration	Voltage	Cell 8 Gain	12121	â€”
Calibration	Voltage	Cell 9 Gain	12121	â€”
Calibration	Voltage	Cell 10 Gain	12121	â€”
Calibration	Voltage	Pack Gain	34196	â€”
Calibration	Voltage	TOS Gain	33838	â€”
Calibration	Voltage	LD Gain	35673	â€”
Calibration	Voltage	ADC Gain	4040	â€”
Calibration	Current	CC Gain	0.5	mÎ
Calibration	Current	Capacity Gain	0.5	mÎ
Calibration	Vcell Offset	Vcell Offset	0	mV
Calibration	V Divider Offset	Vdiv Offset	0	userV
Calibration	Current Offset	Coulomb Counter Offset Samples	64	â€”
Calibration	Current Offset	Board Offset	0	â€”
Calibration	Temperature	Internal Temp Offset	0	Â°C
Calibration	Temperature	CFETOFF Temp Offset	0	Â°C
Calibration	Temperature	DFETOFF Temp Offset	0	Â°C
Calibration	Temperature	ALERT Temp Offset	0	Â°C
Calibration	Temperature	TS1 Temp Offset	0	Â°C
Calibration	Temperature	TS2 Temp Offset	0	Â°C
Calibration	Temperature	TS3 Temp Offset	0	Â°C
Calibration	Temperature	HDQ Temp Offset	0	Â°C
Calibration	Temperature	DCHG Temp Offset	0	Â°C
Calibration	Temperature	DDSG Temp Offset	0	Â°C
Calibration	Internal Temp Model	Int Gain	25390	â€”
Calibration	Internal Temp Model	Int base offset	3032	â€”
Calibration	Internal Temp Model	Int Maximum AD	16383	â€”
Calibration	Internal Temp Model	Int Maximum Temp	6379	0.1K
Calibration	18K Temperature Model	Coeff a1	-15524	â€”
Calibration	18K Temperature Model	Coeff a2	26423	â€”
Calibration	18K Temperature Model	Coeff a3	-22664	â€”
Calibration	18K Temperature Model	Coeff a4	28834	â€”
Calibration	18K Temperature Model	Coeff a5	672	â€”
Calibration	18K Temperature Model	Coeff b1	-371	â€”
Calibration	18K Temperature Model	Coeff b2	708	â€”
Calibration	18K Temperature Model	Coeff b3	-3498	â€”
Calibration	18K Temperature Model	Coeff b4	5051	â€”
Calibration	18K Temperature Model	Adc0	11703	â€”
Calibration	180K Temperature Model	Coeff a1	-17513	â€”
Calibration	180K Temperature Model	Coeff a2	25759	â€”
Calibration	180K Temperature Model	Coeff a3	-23593	â€”
Calibration	180K Temperature Model	Coeff a4	32175	â€”
Calibration	180K Temperature Model	Coeff a5	2090	â€”
Calibration	180K Temperature Model	Coeff b1	-2055	â€”
Calibration	180K Temperature Model	Coeff b2	2955	â€”
Calibration	180K Temperature Model	Coeff b3	-3427	â€”
Calibration	180K Temperature Model	Coeff b4	4385	â€”
Calibration	180K Temperature Model	Adc0	17246	â€”
Calibration	Custom Temperature Model	Coeff a1	0	â€”
Calibration	Custom Temperature Model	Coeff a2	0	â€”
Calibration	Custom Temperature Model	Coeff a3	0	â€”
Calibration	Custom Temperature Model	Coeff a4	0	â€”
Calibration	Custom Temperature Model	Coeff a5	0	â€”
Calibration	Custom Temperature Model	Coeff b1	0	â€”
Calibration	Custom Temperature Model	Coeff b2	0	â€”
Calibration	Custom Temperature Model	Coeff b3	0	â€”
Calibration	Custom Temperature Model	Coeff b4	0	â€”
Calibration	Custom Temperature Model	Rc0	0	â€”
Calibration	Custom Temperature Model	Adc0	0	â€”
Calibration	Current Deadband	Coulomb Counter Deadband	9	234nV
Calibration	CUV	CUV Threshold Override	ffff	Hex
Calibration	COV	COV Threshold Override	ffff	Hex
Settings	Fuse	Min Blow Fuse Voltage	5000	mV
Settings	Fuse	Fuse Blow Timeout	30	s
Settings	Configuration	Power Config	2882	Hex
Settings	Configuration	REG12 Config	00	Hex
Settings	Configuration	REG0 Config	00	Hex
Settings	Configuration	HWD Regulator Options	00	Hex
Settings	Configuration	Comm Type	00	â€”
Settings	Configuration	I2C Address	00	â€”
Settings	Configuration	SPI Configuration	20	â€”
Settings	Configuration	Comm Idle Time	0	s
Settings	Configuration	CFETOFF Pin Config	00	Hex
Settings	Configuration	DFETOFF Pin Config	00	Hex
Settings	Configuration	ALERT Pin Config	00	Hex
Settings	Configuration	TS1 Config	07	Hex
Settings	Configuration	TS2 Config	00	Hex
Settings	Configuration	TS3 Config	07	Hex
Settings	Configuration	HDQ Pin Config	05	Hex
Settings	Configuration	DCHG Pin Config	00	Hex
Settings	Configuration	DDSG Pin Config	00	Hex
Settings	Configuration	DA Configuration	05	Hex
Settings	Configuration	Vcell Mode	000f	Hex
Settings	Configuration	CC3 Samples	80	Num
Settings	Protection	Protection Configuration	0002	Hex
Settings	Protection	Enabled Protections A	bc	Hex
Settings	Protection	Enabled Protections B	33	Hex
Settings	Protection	Enabled Protections C	00	Hex
Settings	Protection	CHG FET Protections A	98	Hex
Settings	Protection	CHG FET Protections B	d5	Hex
Settings	Protection	CHG FET Protections C	56	Hex
Settings	Protection	DSG FET Protections A	e4	Hex
Settings	Protection	DSG FET Protections B	e6	Hex
Settings	Protection	DSG FET Protections C	e2	Hex
Settings	Protection	Body Diode Threshold	50	mA
Settings	Alarm	Default Alarm Mask	f804	Hex
Settings	Alarm	SF Alert Mask A	fc	Hex
Settings	Alarm	SF Alert Mask B	f7	Hex
Settings	Alarm	SF Alert Mask C	f4	Hex
Settings	Alarm	PF Alert Mask A	5f	Hex
Settings	Alarm	PF Alert Mask B	9f	Hex
Settings	Alarm	PF Alert Mask C	00	Hex
Settings	Alarm	PF Alert Mask D	00	Hex
Settings	Permanent Failure	Enabled PF A	13	Hex
Settings	Permanent Failure	Enabled PF B	00	Hex
Settings	Permanent Failure	Enabled PF C	07	Hex
Settings	Permanent Failure	Enabled PF D	00	Hex
Settings	FET	FET Options	1f	Hex
Settings	FET	Chg Pump Control	05	Hex
Settings	FET	Precharge Start Voltage	0	mV
Settings	FET	Precharge Stop Voltage	9000	mV
Settings	FET	Predischarge Timeout	10	10ms
Settings	FET	Predischarge Stop Delta	500	mV
Settings	Current Thresholds	Dsg Current Threshold	100	userA
Settings	Current Thresholds	Chg Current Threshold	50	userA
Settings	Cell Open-Wire	Check Time	5	s
Settings	Interconnect Resistances	Cell 1 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 2 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 3 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 4 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 5 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 6 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 7 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 8 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 9 Interconnect	0	mÎ
Settings	Interconnect Resistances	Cell 10 Interconnect	0	mÎ
Settings	Manufacturing	Mfg Status Init	0050	Hex
Settings	Cell Balancing Config	Balancing Configuration	00	Hex
Settings	Cell Balancing Config	Min Cell Temp	0	Â°C
Settings	Cell Balancing Config	Max Cell Temp	60	Â°C
Settings	Cell Balancing Config	Max Internal Temp	70	Â°C
Settings	Cell Balancing Config	Cell Balance Interval	10	s
Settings	Cell Balancing Config	Cell Balance Max Cells	2	Num
Settings	Cell Balancing Config	Cell Balance Min Cell V (Charge)	3400	mV
Settings	Cell Balancing Config	Cell Balance Min Delta (Charge)	100	mV
Settings	Cell Balancing Config	Cell Balance Stop Delta (Charge)	50	mV
Settings	Cell Balancing Config	Cell Balance Min Cell V (Relax)	3500	mV
Settings	Cell Balancing Config	Cell Balance Min Delta (Relax)	100	mV
Settings	Cell Balancing Config	Cell Balance Stop Delta (Relax)	50	mV
Power	Shutdown	Shutdown Cell Voltage	1500	mV
Power	Shutdown	Shutdown Stack Voltage	6000	mV
Power	Shutdown	Low V Shutdown Delay	1	s
Power	Shutdown	Shutdown Temperature	85	Â°C
Power	Shutdown	Shutdown Temperature Delay	5	s
Power	Shutdown	FET Off Delay	0	0.25s
Power	Shutdown	Shutdown Command Delay	0	0.25s
Power	Shutdown	Auto Shutdown Time	0	min
Power	Shutdown	RAM Fail Shutdown Time	5	s
Power	Sleep	Sleep Current	20	mA
Power	Sleep	Voltage Time	5	s
Power	Sleep	Wake Comparator Current	500	mA
Power	Sleep	Sleep Hysteresis Time	10	s
Power	Sleep	Sleep Charger Voltage Threshold	20000	mV
Power	Sleep	Sleep Charger PACK-TOS Delta	2000	mV
System Data	Integrity	Config RAM Signature	0000	Hex
Protections	CUV	Threshold	55	50.6mV
Protections	CUV	Delay	74	3.3 ms
Protections	CUV	Recovery Hysteresis	2	50.6mV
Protections	COV	Threshold	72	50.6mV
Protections	COV	Delay	74	3.3 ms
Protections	COV	Recovery Hysteresis	2	50.6mV
Protections	COVL	Latch Limit	0	â€”
Protections	COVL	Counter Dec Delay	10	s
Protections	COVL	Recovery Time	15	s
Protections	OCC	Threshold	6	mV
Protections	OCC	Delay	4	3.3 ms
Protections	OCC	Recovery Threshold	-200	mA
Protections	OCC	PACK-TOS Delta	2000	mV
Protections	OCD1	Threshold	4	mV
Protections	OCD1	Delay	7	3.3 ms
Protections	OCD2	Threshold	6	mV
Protections	OCD2	Delay	1	3.3 ms
Protections	SCD	Threshold	10	â€”
Protections	SCD	Delay	15	Âµs
Protections	SCD	Recovery Time	5	s
Protections	OCD3	Threshold	-200	userA
Protections	OCD3	Delay	2	s
Protections	OCD	Recovery Threshold	200	mA
Protections	OCDL	Latch Limit	0	â€”
Protections	OCDL	Counter Dec Delay	10	s
Protections	OCDL	Recovery Time	15	s
Protections	OCDL	Recovery Threshold	200	mA
Protections	SCDL	Latch Limit	0	â€”
Protections	SCDL	Counter Dec Delay	10	s
Protections	SCDL	Recovery Time	15	s
Protections	SCDL	Recovery Threshold	200	mA
Protections	OTC	Threshold	55	Â°C
Protections	OTC	Delay	2	s
Protections	OTC	Recovery	50	Â°C
Protections	OTD	Threshold	65	Â°C
Protections	OTD	Delay	2	s
Protections	OTD	Recovery	55	Â°C
Protections	OTF	Threshold	80	Â°C
Protections	OTF	Delay	2	s
Protections	OTF	Recovery	65	Â°C
Protections	OTINT	Threshold	85	Â°C
Protections	OTINT	Delay	2	s
Protections	OTINT	Recovery	80	Â°C
Protections	UTC	Threshold	-5	Â°C
Protections	UTC	Delay	2	s
Protections	UTC	Recovery	0	Â°C
Protections	UTD	Threshold	-10	Â°C
Protections	UTD	Delay	2	s
Protections	UTD	Recovery	0	Â°C
Protections	UTINT	Threshold	-20	Â°C
Protections	UTINT	Delay	2	s
Protections	UTINT	Recovery	0	Â°C
Protections	Recovery	Time	3	s
Protections	HWD	Delay	60	s
Protections	Load Detect	Active Time	0	s
Protections	Load Detect	Retry Delay	50	s
Protections	Load Detect	Timeout	1	hrs
Protections	PTO	Charge Threshold	250	mA
Protections	PTO	Delay	1800	s
Protections	PTO	Reset	2	userAh
Permanent Fail	CUDEP	Threshold	2000	mV
Permanent Fail	CUDEP	Delay	2	s
Permanent Fail	SUV	Threshold	1000	mV
Permanent Fail	SUV	Delay	5	s
Permanent Fail	SOV	Threshold	3800	mV
Permanent Fail	SOV	Delay	5	s
Permanent Fail	TOS	Threshold	1000	mV
Permanent Fail	TOS	Delay	5	s
Permanent Fail	SOCC	Threshold	3000	userA
Permanent Fail	SOCC	Delay	5	s
Permanent Fail	SOCD	Threshold	-3000	userA
Permanent Fail	SOCD	Delay	5	s
Permanent Fail	SOT	Threshold	95	Â°C
Permanent Fail	SOT	Delay	5	s
Permanent Fail	SOTF	Threshold	100	Â°C
Permanent Fail	SOTF	Delay	5	s
Permanent Fail	VIMR	Check Voltage	3500	mV
Permanent Fail	VIMR	Max Relax Current	10	mA
Permanent Fail	VIMR	Threshold	500	mV
Permanent Fail	VIMR	Delay	5	s
Permanent Fail	VIMR	Relax Min Duration	100	s
Permanent Fail	VIMA	Check Voltage	3700	mV
Permanent Fail	VIMA	Min Active Current	50	mA
Permanent Fail	VIMA	Threshold	200	mV
Permanent Fail	VIMA	Delay	5	s
Permanent Fail	CFETF	OFF Threshold	20	mA
Permanent Fail	CFETF	OFF Delay	5	s
Permanent Fail	DFETF	OFF Threshold	-20	mA
Permanent Fail	DFETF	OFF Delay	5	s
Permanent Fail	VSSF	Fail Threshold	100	â€”
Permanent Fail	VSSF	Delay	5	s
Permanent Fail	2LVL	Delay	5	s
Permanent Fail	LFOF	Delay	5	s
Permanent Fail	HWMX	Delay	5	s
Security	Settings	Security Settings	00	Hex
Security	Keys	Unseal Key Step 1	0414	Hex
Security	Keys	Unseal Key Step 2	3672	Hex
Security	Keys	Full Access Key Step 1	ffff	Hex
Security	Keys	Full Access Key Step 2	ffff	Hex

您好、Luis：

我正在使用 BQ Studio 进行校准。

有一个 CC Gain 和 Capacity Gain 选项、我需要输入电阻值。

我们是否需要为电流测量执行任何其他校准？

此外、分流电阻器上的电压与所提供电流的预期电压相同。

这些是我使用 BQ studio 刷写到 OPT 中的参数。

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Kunal、

是的、看起来不错。否、CC 增益和容量增益应该只是电流测量所需的全部。

您能用 bqStudio 记录您的测试吗？另外、您要测量什么电流？ CC1/CC2？

很奇怪电流这么关闭。情况不应该是这样。最好能测量分流电阻器上的电压、从而知道电压是多少。

最后、您能否共享您的原理图以便我进行审阅？

此致、

路易斯·埃尔南德斯·萨洛蒙

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Luis：

请检查随附的原理图并验证一次。

此外、我还附上了100A 电流的日志。

e2e.ti.com/.../12V_5F00_100Amp.log

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Kunal、

您是否没有将电池连接到 VC10 - VC9？该部件需要 VC10 - VC9才能连接真正的电芯。

原理图似乎为1m Ω、而不是0.5m Ω。哪一项是正确的？

日志似乎还显示了~32000的电流、到底在那里发生了什么？您是否具有器件的.gg 文件？

此致、

路易斯·埃尔南德斯·萨洛蒙

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Luis：

基本而言、我们并联了2个1m Ω 的并联电阻器、从而形成0.5 mOhm.e2e.ti.com/.../BQ76942_5F00_Calibration_5F00_settings_5F00_4S.gg.gg-1-_2800_1_2900_.csv

请检查.gg 文件、建议是否需要进行任何更改。

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Kunal、

原理图显示了2个2m Ω 的分流电阻器、这些电阻器并联后可以形成1m Ω。原理图是否不正确？

状态。我确实看到您具有 设置：配置：DA 配置[USER_AMPS_0] 设置。这意味着电流将以 mA 为单位进行报告。不过、这意味着只能测量高达~32A 的电流。因为电流测量值只能从 –32768到+32767。

因此、如果要测量高于此值的电流、则需要更改 UserA 设置。例如、将 Settings：Configuration：DA Configuration：[USER_AMPS_1：0]设置为0x02、以便您的当前单位(userA)为10mA。

现在、我想提醒您、该器件需要连接 VC10 - VC9才能真正连接电池。

此致、

路易斯·埃尔南德斯·萨洛蒙

0 admin 1 年多前

TI__Guru**** 2457760 points

请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。

您好、Luis：

感谢您的支持。

此问题已通过 设置：配置：DA 配置[USER_AMPS_0] 。

现在、我能够读取高达100A 的电流。

此致、

K·万赫德

电源管理（参考译文帖）

电源管理（参考译文帖）(Read Only)

[参考译文] BQ76942：BQ76952