nPM1300 charging battery and getting a correct SOC with the Fuel Gauge lib from nRF Connect SDK V2.6.0

[rob]

Hi,

I am using the nPM1300 in combination with a STM32L431KBU MCU. 

Also the code from Nordic to communicate with the nPM1300: https://github.com/NordicSemiconductor/npmx 

to get the SOC I am using the fuel gauge lib provided by Nordic in de nRF Connect SDK V2.6.0 (cortex-m4\hard-float\libnrf_fuel_gauge.a).

For discharging the battery the SOC seems to be fine but when charging the battery the SOC value is incorrect.

Every second I update the fuel gauge lib, the SOC will increase 1%. within a 100sec the SOC is at 100% but the battery is still not full. (6 to 7 hours to go with 0.2C charging current)

I have tried to disable the charging module in the nPM1300 for a short period to do a fuel gauge update but as result losing the ADC battery voltage and current measurements.

fuel gauge update code (update interval, 1 sec):

static pm_error_t fuel_gauge_update(void)

{

bool cc_charging = false;

if(pm.charge.state == APP_STATE_VBUS_CONNECTED_CHARGING_CC)

{

cc_charging = true;

}

/*fuel gauge update*/

pm.gauge.delta = ((float)(pm_uptimer_get() - pm.gauge.ref_time)) / 1000.0f;

pm.gauge.soc = nrf_fuel_gauge_process(pm.adc.values.voltage, pm.adc.values.current, pm.adc.values.temp, pm.gauge.delta, NULL);

pm.gauge.tte = nrf_fuel_gauge_tte_get();

pm.gauge.ttf = nrf_fuel_gauge_ttf_get(cc_charging, -pm.gauge.term_charge_current);

return PM_SUCCES;

}

command used for disable charger module:

/* Disable charger before changing charge current. */

npmx_charger_module_disable_set(charger_instance, NPMX_CHARGER_MODULE_CHARGER_MASK | NPMX_CHARGER_MODULE_RECHARGE_MASK);

My questions:
How to get a correct SOC when charging?

Is this possible with the fuel gauge lib from Nordic?

[Andy Sinclair]

Hi.

I have been looking at this recently, and I have it working correctly with the latest fuel gauge library and updated npmx.

There is a pending update to our npmx-zephyr example project you may find useful as a reference:
samples: fuel_gauge: Updated to latest nrfxlib by aasinclair · Pull Request #128 · NordicSemiconductor/npmx-zephyr (github.com)

Andy

[rob]

Hi,

Thank you for you quick reply.

I have look a the changes made and I already had concluded that there was a incorrect variable given to the nrf_fuel_gauge_ttf_get() function.

OLD:

ttf = nrf_fuel_gauge_ttf_get(-max_charge_current, -term_charge_current);

NEW:
ttf = nrf_fuel_gauge_ttf_get(cc_charging, -term_charge_current);

Even with this change the SOC value is still incorrect when charging.

the SOC is calculated by nrf_fuel_gauge_process() function.

the sample code also reinforces the conclusion that nrf_fuel_gauge_process() may/needs to be used when charging because both nrf_fuel_gauge_process() and nrf_fuel_gauge_ttf_get() are called on in function fuel_gauge_update().

I am using a lithium ion battery DNK 16340-2P 1700mAh.

charging current around 0.2C (400mA)

I made the battery model with the nRF Connect app and necessary Nordic evaluation boards.

fuel gauge update interval: 1 second

already tried different time intervals when charging, 30sec, 1 min and 2 min, to see if this will improved SOC. It does not.

My questions:
How to get a correct SOC when charging?

Is this possible with the fuel gauge lib from Nordic?

[Andy Sinclair]

Hi.

I get sensible increase in SoC during charging using the latest sample (see below).

Can you post an example output with the incorrect SoC?
Where are you updating pm.gauge.ref_time?

Andy

[00:01:16.806,121] <inf> fuel_gauge: V: 4.018, I: 0.021, T: 24.80, SoC: 82.13, TTE: 9623, TTF: nan
[00:01:17.811,004] <inf> fuel_gauge: V: 4.013, I: 0.016, T: 24.80, SoC: 82.13, TTE: 9993, TTF: nan
[00:01:18.815,856] <inf> fuel_gauge: V: 4.018, I: 0.055, T: 24.80, SoC: 82.13, TTE: 10355, TTF: nan
[00:01:19.820,648] <inf> fuel_gauge: V: 4.018, I: 0.027, T: 24.80, SoC: 82.13, TTE: 10710, TTF: nan
[00:01:20.825,531] <inf> fuel_gauge: V: 4.008, I: 0.008, T: 24.80, SoC: 82.11, TTE: 10968, TTF: nan
[00:01:21.830,413] <inf> fuel_gauge: V: 4.013, I: 0.008, T: 24.80, SoC: 82.09, TTE: 11210, TTF: nan
[00:01:22.835,327] <inf> fuel_gauge: V: 4.101, I: -0.164, T: 24.80, SoC: 82.09, TTE: nan, TTF: nan
[00:01:23.840,148] <inf> fuel_gauge: V: 4.101, I: -0.164, T: 24.80, SoC: 82.11, TTE: nan, TTF: nan
[00:01:24.845,031] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.91, SoC: 82.13, TTE: nan, TTF: nan
[00:01:25.849,914] <inf> fuel_gauge: V: 4.101, I: -0.163, T: 24.80, SoC: 82.15, TTE: nan, TTF: nan
[00:01:26.854,827] <inf> fuel_gauge: V: 4.101, I: -0.164, T: 24.91, SoC: 82.17, TTE: nan, TTF: nan
[00:01:27.859,649] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.80, SoC: 82.18, TTE: nan, TTF: nan
[00:01:28.864,532] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.91, SoC: 82.20, TTE: nan, TTF: nan
[00:01:29.869,445] <inf> fuel_gauge: V: 4.106, I: -0.163, T: 24.91, SoC: 82.22, TTE: nan, TTF: nan
[00:01:30.874,389] <inf> fuel_gauge: V: 4.106, I: -0.163, T: 24.91, SoC: 82.24, TTE: nan, TTF: nan
[00:01:31.879,241] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.91, SoC: 82.26, TTE: nan, TTF: nan
[00:01:32.884,094] <inf> fuel_gauge: V: 4.101, I: -0.163, T: 24.91, SoC: 82.27, TTE: nan, TTF: nan
[00:01:33.889,007] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.80, SoC: 82.29, TTE: nan, TTF: nan
[00:01:34.893,951] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.91, SoC: 82.31, TTE: nan, TTF: nan
[00:01:35.898,803] <inf> fuel_gauge: V: 4.101, I: -0.165, T: 24.80, SoC: 82.33, TTE: nan, TTF: nan
[00:01:36.903,686] <inf> fuel_gauge: V: 4.106, I: -0.164, T: 24.91, SoC: 82.35, TTE: nan, TTF: nan
[00:01:37.908,569] <inf> fuel_gauge: V: 4.101, I: -0.164, T: 24.91, SoC: 82.36, TTE: nan, TTF: nan
[00:01:38.913,482] <inf> fuel_gauge: V: 4.106, I: -0.163, T: 24.91, SoC: 82.38, TTE: nan, TTF: nan

[rob]

Hi,

fuel gouage update every second.

from 42.77% tot 100% in 2min 16 sec.

Battery voltage is not even close to max (set to 4.1V in the battery model and charging settings)

see output below:

[00:00:02.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 42.77, SoC: 45.35, TTE: nan, TTF: nan
[00:00:03.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 43.03, SoC: 45.37, TTE: nan, TTF: nan
[00:00:04.027] <info> fuel_gauge: V: 3.691, I: -0.326, T: 43.15, SoC: 45.40, TTE: nan, TTF: nan
[00:00:05.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 43.28, SoC: 45.43, TTE: nan, TTF: nan
[00:00:06.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 43.42, SoC: 45.47, TTE: nan, TTF: nan
[00:00:07.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 43.42, SoC: 45.52, TTE: nan, TTF: nan
[00:00:08.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 43.54, SoC: 45.57, TTE: nan, TTF: nan
[00:00:09.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 43.81, SoC: 45.63, TTE: nan, TTF: nan
[00:00:10.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 43.81, SoC: 45.69, TTE: nan, TTF: nan
[00:00:11.027] <info> fuel_gauge: V: 3.691, I: -0.327, T: 43.94, SoC: 45.76, TTE: nan, TTF: nan
[00:00:12.027] <info> fuel_gauge: V: 3.691, I: -0.327, T: 44.07, SoC: 45.84, TTE: nan, TTF: nan
[00:00:13.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 44.21, SoC: 45.92, TTE: nan, TTF: nan
[00:00:14.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 44.21, SoC: 46.01, TTE: nan, TTF: nan
[00:00:15.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 44.34, SoC: 46.11, TTE: nan, TTF: nan
[00:00:16.027] <info> fuel_gauge: V: 3.691, I: -0.327, T: 44.47, SoC: 46.21, TTE: nan, TTF: nan
[00:00:17.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 44.60, SoC: 46.32, TTE: nan, TTF: nan
[00:00:18.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 44.73, SoC: 46.44, TTE: nan, TTF: nan
[00:00:19.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 44.73, SoC: 46.57, TTE: nan, TTF: nan
[00:00:20.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 44.86, SoC: 46.70, TTE: nan, TTF: nan
[00:00:21.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 44.86, SoC: 46.83, TTE: nan, TTF: nan
[00:00:22.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 44.99, SoC: 46.97, TTE: nan, TTF: nan
[00:00:23.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 45.12, SoC: 47.12, TTE: nan, TTF: nan
[00:00:24.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 45.12, SoC: 47.28, TTE: nan, TTF: 8353
[00:00:25.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 45.25, SoC: 47.44, TTE: nan, TTF: 8322
[00:00:26.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 45.25, SoC: 47.61, TTE: nan, TTF: 8293
[00:00:27.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 45.25, SoC: 47.79, TTE: nan, TTF: 8260
[00:00:28.027] <info> fuel_gauge: V: 3.706, I: -0.326, T: 45.39, SoC: 47.97, TTE: nan, TTF: 8231
[00:00:29.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 45.39, SoC: 48.15, TTE: nan, TTF: 8201
[00:00:30.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 45.39, SoC: 48.35, TTE: nan, TTF: 8169
[00:00:31.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 45.52, SoC: 48.55, TTE: nan, TTF: 8137
[00:00:32.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 45.65, SoC: 48.76, TTE: nan, TTF: 8104
[00:00:33.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 45.78, SoC: 48.97, TTE: nan, TTF: 8070
[00:00:34.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 45.78, SoC: 49.19, TTE: nan, TTF: 8032
[00:00:35.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 45.78, SoC: 49.42, TTE: nan, TTF: 7996
[00:00:36.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 45.78, SoC: 49.65, TTE: nan, TTF: 7958
[00:00:37.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 45.92, SoC: 49.89, TTE: nan, TTF: 7919
[00:00:38.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 46.05, SoC: 50.14, TTE: nan, TTF: 7877
[00:00:39.027] <info> fuel_gauge: V: 3.706, I: -0.328, T: 46.05, SoC: 50.39, TTE: nan, TTF: 7838
[00:00:40.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 46.19, SoC: 50.65, TTE: nan, TTF: 7795
[00:00:41.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 46.19, SoC: 50.91, TTE: nan, TTF: 7755
[00:00:42.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 46.32, SoC: 51.19, TTE: nan, TTF: 7713
[00:00:43.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 46.32, SoC: 51.46, TTE: nan, TTF: 7671
[00:00:44.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 46.19, SoC: 51.75, TTE: nan, TTF: 7628
[00:00:45.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 46.45, SoC: 52.04, TTE: nan, TTF: 7581
[00:00:46.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 46.45, SoC: 52.34, TTE: nan, TTF: 7533
[00:00:47.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 46.59, SoC: 52.64, TTE: nan, TTF: 7487
[00:00:48.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 46.59, SoC: 52.95, TTE: nan, TTF: 7438
[00:00:49.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 46.59, SoC: 53.27, TTE: nan, TTF: 7388
[00:00:50.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 46.73, SoC: 53.59, TTE: nan, TTF: 7339
[00:00:51.027] <info> fuel_gauge: V: 3.706, I: -0.327, T: 46.73, SoC: 53.92, TTE: nan, TTF: 7286
[00:00:52.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 46.86, SoC: 54.26, TTE: nan, TTF: 7234
[00:00:53.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 46.86, SoC: 54.60, TTE: nan, TTF: 7183
[00:00:54.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 46.86, SoC: 54.95, TTE: nan, TTF: 7129
[00:00:55.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.00, SoC: 55.30, TTE: nan, TTF: 7075
[00:00:56.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.00, SoC: 55.67, TTE: nan, TTF: 7019
[00:00:57.027] <info> fuel_gauge: V: 3.696, I: -0.326, T: 47.00, SoC: 56.04, TTE: nan, TTF: 6961
[00:00:58.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 47.14, SoC: 56.41, TTE: nan, TTF: 6905
[00:00:59.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 47.14, SoC: 56.79, TTE: nan, TTF: 6848
[00:01:00.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 47.14, SoC: 57.17, TTE: nan, TTF: 6789
[00:01:01.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 47.27, SoC: 57.57, TTE: nan, TTF: 6729
[00:01:02.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 47.27, SoC: 57.96, TTE: nan, TTF: 6668
[00:01:03.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 47.27, SoC: 58.37, TTE: nan, TTF: 6608
[00:01:04.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 47.41, SoC: 58.78, TTE: nan, TTF: 6545
[00:01:05.027] <info> fuel_gauge: V: 3.696, I: -0.327, T: 47.41, SoC: 59.20, TTE: nan, TTF: 6481
[00:01:06.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.41, SoC: 59.62, TTE: nan, TTF: 6416
[00:01:07.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 47.41, SoC: 60.05, TTE: nan, TTF: 6349
[00:01:08.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.55, SoC: 60.49, TTE: nan, TTF: 6282
[00:01:09.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 47.55, SoC: 60.93, TTE: nan, TTF: 6213
[00:01:10.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.55, SoC: 61.38, TTE: nan, TTF: 6146
[00:01:11.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 47.69, SoC: 61.84, TTE: nan, TTF: 6076
[00:01:12.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 47.69, SoC: 62.30, TTE: nan, TTF: 6007
[00:01:13.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 47.69, SoC: 62.76, TTE: nan, TTF: 5936
[00:01:14.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 47.69, SoC: 63.24, TTE: nan, TTF: 5864
[00:01:15.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.83, SoC: 63.71, TTE: nan, TTF: 5791
[00:01:16.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.83, SoC: 64.20, TTE: nan, TTF: 5716
[00:01:17.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.83, SoC: 64.70, TTE: nan, TTF: 5639
[00:01:18.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 47.83, SoC: 65.20, TTE: nan, TTF: 5562
[00:01:19.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 47.97, SoC: 65.71, TTE: nan, TTF: 5483
[00:01:20.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 47.97, SoC: 66.22, TTE: nan, TTF: 5406
[00:01:21.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 47.97, SoC: 66.73, TTE: nan, TTF: 5326
[00:01:22.027] <info> fuel_gauge: V: 3.706, I: -0.327, T: 47.97, SoC: 67.26, TTE: nan, TTF: 5244
[00:01:23.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.11, SoC: 67.79, TTE: nan, TTF: 5163
[00:01:24.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.11, SoC: 68.32, TTE: nan, TTF: 5081
[00:01:25.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 48.25, SoC: 68.87, TTE: nan, TTF: 4998
[00:01:26.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.11, SoC: 69.42, TTE: nan, TTF: 4913
[00:01:27.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.25, SoC: 69.97, TTE: nan, TTF: 4827
[00:01:28.027] <info> fuel_gauge: V: 3.706, I: -0.326, T: 48.25, SoC: 70.53, TTE: nan, TTF: 4740
[00:01:29.027] <info> fuel_gauge: V: 3.706, I: -0.328, T: 48.25, SoC: 71.10, TTE: nan, TTF: 4654
[00:01:30.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.25, SoC: 71.68, TTE: nan, TTF: 4565
[00:01:31.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.25, SoC: 72.26, TTE: nan, TTF: 4475
[00:01:32.027] <info> fuel_gauge: V: 3.706, I: -0.328, T: 48.25, SoC: 72.85, TTE: nan, TTF: 4384
[00:01:33.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.39, SoC: 73.44, TTE: nan, TTF: 4292
[00:01:34.027] <info> fuel_gauge: V: 3.706, I: -0.326, T: 48.39, SoC: 74.04, TTE: nan, TTF: 4199
[00:01:35.027] <info> fuel_gauge: V: 3.706, I: -0.327, T: 48.39, SoC: 74.64, TTE: nan, TTF: 4107
[00:01:36.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.39, SoC: 75.25, TTE: nan, TTF: 4013
[00:01:37.027] <info> fuel_gauge: V: 3.706, I: -0.327, T: 48.53, SoC: 75.86, TTE: nan, TTF: 3918
[00:01:38.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.39, SoC: 76.49, TTE: nan, TTF: 3822
[00:01:39.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.53, SoC: 77.12, TTE: nan, TTF: 3724
[00:01:40.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.53, SoC: 77.76, TTE: nan, TTF: 3625
[00:01:41.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.53, SoC: 78.40, TTE: nan, TTF: 3525
[00:01:42.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.67, SoC: 79.05, TTE: nan, TTF: 3424
[00:01:43.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.67, SoC: 79.71, TTE: nan, TTF: 3322
[00:01:44.027] <info> fuel_gauge: V: 3.706, I: -0.328, T: 48.67, SoC: 80.37, TTE: nan, TTF: 3220
[00:01:45.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.67, SoC: 81.04, TTE: nan, TTF: 3115
[00:01:46.027] <info> fuel_gauge: V: 3.706, I: -0.327, T: 48.67, SoC: 81.71, TTE: nan, TTF: 3012
[00:01:47.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.81, SoC: 82.39, TTE: nan, TTF: 2906
[00:01:48.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.67, SoC: 83.07, TTE: nan, TTF: 2800
[00:01:49.027] <info> fuel_gauge: V: 3.706, I: -0.327, T: 48.81, SoC: 83.77, TTE: nan, TTF: 2692
[00:01:50.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.67, SoC: 84.47, TTE: nan, TTF: 2583
[00:01:51.027] <info> fuel_gauge: V: 3.706, I: -0.328, T: 48.81, SoC: 85.17, TTE: nan, TTF: 2473
[00:01:52.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.81, SoC: 85.89, TTE: nan, TTF: 2362
[00:01:53.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.81, SoC: 86.60, TTE: nan, TTF: 2250
[00:01:54.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.81, SoC: 87.33, TTE: nan, TTF: 2137
[00:01:55.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.81, SoC: 88.06, TTE: nan, TTF: 2023
[00:01:56.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 48.96, SoC: 88.79, TTE: nan, TTF: 1910
[00:01:57.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.96, SoC: 89.53, TTE: nan, TTF: 1794
[00:01:58.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.96, SoC: 90.27, TTE: nan, TTF: 1678
[00:01:59.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 48.96, SoC: 91.02, TTE: nan, TTF: 1562
[00:02:00.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 48.96, SoC: 91.78, TTE: nan, TTF: 1443
[00:02:01.027] <info> fuel_gauge: V: 3.701, I: -0.326, T: 48.96, SoC: 92.54, TTE: nan, TTF: 1324
[00:02:02.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 49.10, SoC: 93.31, TTE: nan, TTF: 1205
[00:02:03.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 49.10, SoC: 94.09, TTE: nan, TTF: 1083
[00:02:04.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 49.10, SoC: 94.87, TTE: nan, TTF: 961
[00:02:05.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 49.10, SoC: 95.65, TTE: nan, TTF: 838
[00:02:06.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 49.10, SoC: 96.45, TTE: nan, TTF: 714
[00:02:07.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 49.10, SoC: 97.25, TTE: nan, TTF: 589
[00:02:08.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 49.10, SoC: 98.06, TTE: nan, TTF: 463
[00:02:09.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 49.10, SoC: 98.61, TTE: nan, TTF: 377
[00:02:10.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 49.24, SoC: 99.16, TTE: nan, TTF: 290
[00:02:11.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 49.24, SoC: 99.90, TTE: nan, TTF: 174
[00:02:12.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 49.24, SoC: 100.00, TTE: nan, TTF: 158
[00:02:13.027] <info> fuel_gauge: V: 3.701, I: -0.329, T: 49.24, SoC: 100.00, TTE: nan, TTF: 158
[00:02:14.027] <info> fuel_gauge: V: 3.701, I: -0.327, T: 49.24, SoC: 100.00, TTE: nan, TTF: 158
[00:02:15.027] <info> fuel_gauge: V: 3.701, I: -0.328, T: 49.24, SoC: 100.00, TTE: nan, TTF: 158
[00:02:16.027] <info> fuel_gauge: V: 3.696, I: -0.328, T: 49.39, SoC: 100.00, TTE: nan, TTF: 158