BQ769142: BQ769142采集的电流值波动幅度大

您好，BQ769142做的8串管理系统，负载给的3A，测量1mΩ采样电阻上是3mV，用BQSTUDIO采集到的电流却是2A-5A来回跳变，请问如何解决呢？

Star Xu：

您好，电流来回跳变建议做一下电流校正，还是异常建议看一下电流检测电路。

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user1949781：

电流校正完还是大幅度跳变，并且充电5A显示正常无跳变，放电3A还是2-5A之间跳变，后端用万用表串联测量实际没有跳变。

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user1949781：

您好，系统参数是8串60AH电池使用，电压和电流刻度都是10，我log的数据发您，是充电5A到放电3A的过程，从数据看放电时的电流值在2A-5A跳变，请专家分析下，谢谢！3618.BQ769142-8S.log

Tue Jun 21 19:47:12 CST 2022Device Version Info = 9142_0_36
BQZ Device Name = bq769142
BQZ Firmware Version = 0_36Sample,DateTime,ElapsedTime,ControlStatus,SafetyAlertA,SafetyStatusA,SafetyAlertB,SafetyStatusB,SafetyAlertC,SafetyStatusC,PFAlertA,PFStatusA,PFAlertB,PFStatusB,PFAlertC,PFStatusC,PFAlertD,PFStatusD,BatteryStatus,Cell1Voltage,Cell2Voltage,Cell3Voltage,Cell4Voltage,Cell5Voltage,Cell6Voltage,Cell7Voltage,Cell8Voltage,Cell9Voltage,Cell10Voltage,Cell11Voltage,Cell12Voltage,Cell13Voltage,Cell14Voltage,StackVoltage,PACKPinVoltage,LDPinVoltage,CC2Current,AlarmStatus,AlarmRawStatus,AlarmEnable,IntTemperature,CFETOFFTemperature,DFETOFFTemperature,ALERTTemperature,TS1Temperature,TS2Temperature,TS3Temperature,HDQTemperature,DCHGTemperature,DDSGTemperature,FETStatus,ManufacturingStatus,CellTemperature,FETTemperature,CC3Current,CC1Current,AccumCharge,AccumTime,CellBalancingActiveCells,CellBalancingPresentTime,LogRowTime(ms),LogStatus
1,2022-06-21 19:47:16,4.000,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3028,3045,3034,3021,0,3028,0,3050,0,0,0,3049,0,3030,2428,2361,2384,486,0x0086,0x0687,0xF886,37.0,-111.1,-273.2,-273.2,30.0,-273.2,30.2,-273.2,-273.2,-273.2,0x45,0x00D0,30.0,30.2,482,482,14,5175,0x8084,21,983,SUCCESS
2,2022-06-21 19:47:20,8.000,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3029,3046,3035,3023,0,3029,0,3052,0,0,0,3051,0,3031,2429,2363,2383,474,0x0086,0x0687,0xF886,36.8,-111.1,-273.2,-273.2,30.1,-273.2,30.3,-273.2,-273.2,-273.2,0x45,0x00D0,30.1,30.3,481,481,15,5179,0x8084,25,1030,SUCCESS
3,2022-06-21 19:47:24,12.001,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3031,3048,3037,3025,0,3031,0,3053,0,0,0,3052,0,3033,2430,2364,2384,481,0x0086,0x0687,0xF886,37.0,-111.1,-273.2,-273.2,30.1,-273.2,30.4,-273.2,-273.2,-273.2,0x45,0x00D0,30.1,30.4,480,481,15,5183,0x8084,29,997,SUCCESS
4,2022-06-21 19:47:28,16.002,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3032,3049,3038,3026,0,3032,0,3054,0,0,0,3053,0,3034,2432,2363,2385,480,0x0086,0x0687,0xF886,37.0,-111.1,-273.2,-273.2,30.2,-273.2,30.6,-273.2,-273.2,-273.2,0x45,0x00D0,30.2,30.6,481,481,16,5187,0x8084,33,997,SUCCESS
5,2022-06-21 19:47:32,20.003,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3033,3050,3039,3027,0,3033,0,3055,0,0,0,3055,0,3035,2434,2366,2386,484,0x0086,0x0687,0xF886,37.2,-111.1,-273.2,-273.2,30.3,-273.2,30.7,-273.2,-273.2,-273.2,0x45,0x00D0,30.3,30.7,480,481,16,5191,0x8084,37,965,SUCCESS
6,2022-06-21 19:47:36,24.004,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3034,3051,3041,3028,0,3034,0,3057,0,0,0,3056,0,3035,2433,2366,2389,478,0x0086,0x0687,0xF886,38.0,-111.1,-273.2,-273.2,30.4,-273.2,30.8,-273.2,-273.2,-273.2,0x45,0x00D0,30.4,30.8,480,481,17,5195,0x8085,41,994,SUCCESS
7,2022-06-21 19:47:40,28.005,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3035,3053,3042,3030,0,3036,0,3058,0,0,0,3057,0,3036,2435,2368,2388,482,0x0086,0x0687,0xF886,38.5,-111.1,-273.2,-273.2,30.4,-273.2,30.9,-273.2,-273.2,-273.2,0x45,0x00D0,30.4,30.9,480,480,17,5199,0x8085,45,978,SUCCESS
8,2022-06-21 19:47:44,32.006,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3037,3054,3043,3031,0,3037,0,3059,0,0,0,3058,0,3037,2436,2368,2389,480,0x0086,0x0687,0xF886,38.8,-111.1,-273.2,-273.2,30.4,-273.2,31.0,-273.2,-273.2,-273.2,0x45,0x00D0,30.4,31.0,480,480,18,5203,0x8085,49,1025,SUCCESS
9,2022-06-21 19:47:48,36.006,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3038,3055,3044,3032,0,3038,0,3060,0,0,0,3059,0,3038,2438,2368,2390,478,0x0086,0x0687,0xF886,38.9,-111.1,-273.2,-273.2,30.5,-273.2,31.1,-273.2,-273.2,-273.2,0x45,0x00D0,30.5,31.1,480,480,18,5207,0x8085,53,1025,SUCCESS
10,2022-06-21 19:47:52,40.007,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3039,3056,3045,3033,0,3039,0,3061,0,0,0,3060,0,3039,2436,2370,2391,480,0x0086,0x0687,0xF886,39.1,-111.1,-273.2,-273.2,30.6,-273.2,31.2,-273.2,-273.2,-273.2,0x45,0x00D0,30.6,31.2,480,480,19,5211,0x8085,57,977,SUCCESS
11,2022-06-21 19:47:56,44.008,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3040,3057,3046,3034,0,3040,0,3062,0,0,0,3061,0,3041,2438,2371,2392,485,0x0086,0x0687,0xF886,39.3,-111.1,-273.2,-273.2,30.7,-273.2,31.4,-273.2,-273.2,-273.2,0x45,0x00D0,30.6,31.4,479,480,19,5215,0x8085,61,989,SUCCESS
12,2022-06-21 19:48:00,48.009,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3041,3058,3047,3035,0,3041,0,3063,0,0,0,3062,0,3042,2439,2373,2392,481,0x0086,0x0687,0xF886,39.3,-111.1,-273.2,-273.2,30.7,-273.2,31.5,-273.2,-273.2,-273.2,0x45,0x00D0,30.7,31.5,478,480,20,5219,0x8085,65,990,SUCCESS
13,2022-06-21 19:48:04,52.010,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3042,3059,3048,3036,0,3042,0,3064,0,0,0,3063,0,3043,2441,2373,2393,483,0x0086,0x0687,0xF886,39.6,-111.2,-273.2,-273.2,30.8,-273.2,31.6,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.6,480,480,20,5223,0x8085,69,991,SUCCESS
14,2022-06-21 19:48:08,56.011,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3028,3043,3035,3022,0,3029,0,3048,0,0,0,3048,0,3027,2410,2313,2325,-323,0x0086,0x0687,0xF886,39.7,-111.4,-273.2,-273.2,30.8,-273.2,31.7,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.7,-319,-311,21,5227,0x8085,73,988,SUCCESS
15,2022-06-21 19:48:12,60.011,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3024,3042,3031,3014,0,3024,0,3046,0,0,0,3043,0,3026,2404,2303,2338,-268,0x0086,0x0687,0xF886,39.8,-111.5,-273.2,-273.2,30.8,-273.2,31.8,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.8,-318,-312,20,5231,0x8085,77,1036,SUCCESS
16,2022-06-21 19:48:16,64.012,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3022,3037,3030,3013,0,3023,0,3043,0,0,0,3043,0,3025,2400,2315,2335,-234,0x0086,0x0683,0xF886,37.7,-111.5,-273.2,-273.2,30.8,-273.2,31.9,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.9,-313,-312,20,5235,0x0000,0,1003,SUCCESS
17,2022-06-21 19:48:20,68.013,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3020,3037,3026,3013,0,3020,0,3042,0,0,0,3038,0,3026,2403,2312,2320,-356,0x0086,0x0683,0xF886,36.3,-111.5,-273.2,-273.2,30.8,-273.2,31.9,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.9,-303,-312,20,5239,0x0000,0,983,SUCCESS
18,2022-06-21 19:48:24,72.014,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3019,3034,3026,3011,0,3020,0,3037,0,0,0,3039,0,3021,2401,2302,2333,-222,0x0086,0x0683,0xF886,36.0,-111.5,-273.2,-273.2,30.8,-273.2,31.8,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.8,-313,-311,19,5243,0x0000,0,998,SUCCESS
19,2022-06-21 19:48:28,76.014,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3017,3034,3025,3009,0,3016,0,3039,0,0,0,3036,0,3022,2395,2309,2331,-315,0x0086,0x0683,0xF886,35.6,-111.5,-273.2,-273.2,30.8,-273.2,31.9,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.9,-318,-311,19,5247,0x0000,0,1032,SUCCESS
20,2022-06-21 19:48:32,80.015,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0124,3016,3032,3024,3006,0,3018,0,3035,0,0,0,3037,0,3020,2395,2311,2321,-335,0x0086,0x0683,0xF886,35.4,-111.5,-273.2,-273.2,30.8,-273.2,31.9,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.9,-306,-311,19,5251,0x0000,0,999,SUCCESS
21,2022-06-21 19:48:36,84.016,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3012,3032,3023,3006,0,3013,0,3037,0,0,0,3035,0,3020,2399,2300,2331,-223,0x0086,0x0683,0xF886,35.4,-111.5,-273.2,-273.2,30.8,-273.2,31.9,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.9,-302,-310,18,5255,0x0000,0,980,SUCCESS
22,2022-06-21 19:48:40,88.017,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3014,3029,3022,3007,0,3013,0,3033,0,0,0,3034,0,3017,2391,2310,2324,-313,0x0086,0x0683,0xF886,35.1,-111.5,-273.2,-273.2,30.8,-273.2,31.8,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.8,-305,-310,18,5259,0x0000,0,981,SUCCESS
23,2022-06-21 19:48:44,92.018,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3011,3030,3021,3003,0,3015,0,3033,0,0,0,3034,0,3017,2399,2302,2316,-421,0x0086,0x0683,0xF886,35.0,-111.5,-273.2,-273.2,30.8,-273.2,31.7,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.7,-308,-312,18,5263,0x0000,0,1027,SUCCESS
24,2022-06-21 19:48:48,96.019,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3012,3027,3019,3004,0,3011,0,3034,0,0,0,3032,0,3017,2392,2304,2329,-403,0x0086,0x0683,0xF886,35.1,-111.5,-273.2,-273.2,30.8,-273.2,31.6,-273.2,-273.2,-273.2,0x45,0x00D0,30.8,31.6,-309,-312,17,5267,0x0000,0,980,SUCCESS
25,2022-06-21 19:48:52,100.019,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3010,3028,3020,3001,0,3012,0,3031,0,0,0,3032,0,3015,2392,2306,2316,-401,0x0086,0x0683,0xF886,34.7,-111.5,-273.2,-273.2,30.7,-273.2,31.6,-273.2,-273.2,-273.2,0x45,0x00D0,30.7,31.5,-299,-312,17,5271,0x0000,0,1072,SUCCESS
26,2022-06-21 19:48:56,104.020,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3007,3028,3019,3001,0,3010,0,3033,0,0,0,3031,0,3015,2395,2293,2327,-233,0x0086,0x0683,0xF886,34.6,-111.6,-273.2,-273.2,30.7,-273.2,31.5,-273.2,-273.2,-273.2,0x45,0x00D0,30.7,31.5,-300,-311,17,5275,0x0000,0,1023,SUCCESS
27,2022-06-21 19:49:00,108.021,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3010,3025,3017,3003,-1,3008,0,3032,0,0,0,3030,0,3015,2387,2307,2317,-402,0x0086,0x0683,0xF886,34.4,-111.5,-273.2,-273.2,30.6,-273.2,31.4,-273.2,-273.2,-273.2,0x45,0x00D0,30.7,31.4,-316,-311,16,5279,0x0000,0,991,SUCCESS
28,2022-06-21 19:49:04,112.022,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3008,3025,3017,2999,0,3010,0,3031,0,0,0,3030,0,3012,2395,2298,2318,-256,0x0086,0x0683,0xF886,34.4,-111.5,-273.2,-273.2,30.6,-273.2,31.3,-273.2,-273.2,-273.2,0x45,0x00D0,30.6,31.3,-314,-310,16,5283,0x0000,0,993,SUCCESS
29,2022-06-21 19:49:08,116.023,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0104,3008,3025,3015,3000,0,3007,0,3031,0,0,0,3028,0,3014,2388,2304,2324,-439,0x0086,0x0683,0xF886,34.5,-111.5,-273.2,-273.2,30.6,-273.2,31.3,-273.2,-273.2,-273.2,0x45,0x00D0,30.6,31.3,-314,-311,15,5288,0x0000,0,990,SUCCESS

,

Star Xu：

您好，非常抱歉，误点了TI认为已解决。

由于问题比较复杂，我需要询问更了解这款芯片的TI工程师，再帮您解答，稍后回复。

,

Star Xu：

您好，从数据上看CC1的电流是稳定的，CC2线路上有噪音，这可能是电流跳跃的原因。

请确认FASTADC 是否设置，建议设置一下看是否有帮助。