Method and apparatus for monitoring secondary power device, and electronic system including the apparatus

Patent metadata

Field	Value
Publication number	US-10908249-B2
Application number	US-201916298753-A
Country	US
Kind code	B2
Filing date	Mar 11, 2019
Priority date	Aug 23, 2018
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A method and apparatus for monitoring a secondary power device, for accurately checking a state of the secondary power device, and an electronic system including the apparatus are provided. The method of monitoring a secondary power device includes: setting a first reference parameter by using a voltage of at least one capacitor of the secondary power device; setting a second reference parameter by using the voltage of the at least one capacitor and the first reference parameter; and setting a reference level for checking of the state of the secondary power device by using the second reference parameter, wherein the reference level is used in checking of the state of the secondary power device.

First claim

What is claimed is:

1. A method of monitoring a secondary power device, the method comprising:
charging, by a charging unit, the secondary power device including at least one capacitor, by supplying power from the charging unit to the secondary power device;
setting, by a calibration unit, a first reference parameter in a first calibration interval by using a voltage of the at least one capacitor;
setting, by the calibration unit, a second reference parameter in a second calibration interval by using the voltage of the at least one capacitor and the first reference parameter;
setting, by a level setting unit, a reference level for checking a state of the secondary power device, by using the second reference parameter; and
monitoring, by a monitoring unit, the state of the secondary power device by using the reference level.

2. The method of claim 1 , wherein the voltage of the at least one capacitor ripples between a local maximum value and a local minimum value via a charging operation of the charging unit,
wherein the setting of the first reference parameter comprises:
detecting a maximum value of the voltage of the at least one capacitor in the first calibration interval;
detecting a minimum value of the voltage of the at least one capacitor in the first calibration interval; and
setting an average of the maximum value and the minimum value as the first reference parameter.

3. The method of claim 2 , wherein the setting of the second reference parameter comprises:
classifying, in the second calibration interval, the voltage of the at least one capacitor into high state intervals and low state intervals by using the first reference parameter;
detecting, in the second calibration interval, first local maximum values in the high state intervals and calculating a first average value which is an average of the first local maximum values;
detecting, in the second calibration interval, first local minimum values in the low state intervals and calculating a second average value which is an average of the first local minimum values; and
setting an average of the first average value and the second average value as the second reference parameter.

4. The method of claim 3 , further comprising extracting each of the first local maximum values from each of the high state intervals via a first comparison logic, and
extracting each of the first local minimum values each of the low state intervals via a second comparison logic.

5. The method of claim 3 , wherein setting of the reference level comprises setting a range of ±Δ about a central value which is set to the second reference parameter as the reference level.

6. The method of claim 5 , wherein Δ is set to a fixed value or a percentage (%) with respect to a difference between the first average value and the second average value.

7. The method of claim 1 , further comprising:
measuring a discharging time of the at least one capacitor by using the reference level; and
comparing the discharging time with a set reference time to determine whether the secondary power device is operating abnormally.

8. The method of claim 7 , further comprising:
obtaining an average discharging time by measuring and averaging a plurality of discharging times of the at least one capacitor; and
comparing the average discharging time with the reference time to determine whether the secondary power device is operating abnormally.

9. The method of claim 1 , wherein the reference level is calibrated by repeatedly performing operations from the setting of the first reference parameter to the setting of the reference level for a set period, or
the reference level is calibrated in real time by using the voltage of the at least one capacitor detected after the setting of the second reference parameter, in resetting of the second reference parameter and resetting of the reference level.

10. The method of claim 1 , wherein setting of the reference level comprises setting a range of ±Δ about a central value which is set to the second reference parameter as the reference level.

11. The method of claim 10 , further comprising:
measuring a discharging time from the voltage of the at least one capacitor corresponding to the second reference parameter +Δ, to a voltage of the at least one capacitor corresponding to the second reference parameter −Δ; and
comparing the discharging time with a set reference time to determine whether the secondary power device is operating abnormally.

12. A method of monitoring a secondary power device, the method comprising:
charging, by a charging unit, the secondary power device including at least one capacitor, by supplying power from the charging unit to the secondary power device;
setting, by a calibration unit, a first reference parameter in a first calibration interval, by using a voltage of the at least one capacitor, wherein the voltage ripples between a local maximum value and a local minimum value;
setting, by the calibration unit, a second reference parameter in a second calibration interval, by using the voltage of the at least one capacitor and the first reference parameter;
setting, by a level setting unit, a reference level to a range of ±Δ about a central value which is set to the second reference parameter; and
monitoring, by a monitoring unit, a state of the secondary power device by using the reference level,
wherein operations from the setting of the first reference parameter to the setting of the reference level are repeated for a set period.

13. The method of claim 12 , further comprising:
setting the first reference parameter to an average of a maximum value and a minimum value of the voltage of the at least one capacitor in the first calibration;
classifying the voltage of the at least one capacitor in the second calibration interval into high state intervals and low state intervals by using the first reference parameter;
detecting first local maximum values from the high state intervals;
calculating a first average value as an average of the first local maximum values;
detecting first local minimum values from the low state intervals;
calculating a second average value as an average of the first local minimum values; and
setting an average of the first average value and the second average value as the second reference parameter.

14. The method of claim 13 , wherein Δ is set to a fixed value or as a percentage (%) with respect to a difference between the first average value and the second average value.

15. The method of claim 12 , further comprising:
measuring a discharging time from the voltage of the at least one capacitor corresponding to the second reference parameter +Δ, to a voltage of the at least one capacitor corresponding to the second reference parameter −Δ; and
comparing the discharging time with a set reference time to determine whether the secondary power device is operating abnormally.

16. A method, comprising:
charging, by a charging unit, a secondary power device;
in a first interval, measuring a capacitor voltage of the secondary power device;
detecting first local minimum values and first local maximum values of the measured capacitor voltage in the first interval;
setting a first reference parameter based on detected local minimum values and local maximum values;
in a second interval, measuring the capacitor voltage of the secondary power device;
setting a second reference parameter based on values of the measured capacitor voltage in the second interval together with the first reference parameter;
setting a reference level as a range centered about a volta

Assignees

• Samsung Electronics Co Ltd

Inventors

• Nam Suck-Hyun
• Kil Min-Sung
• Lim Hyoung-Taek
• Kim Sang-Hoon

Classifications

• H02J9/061

  for DC powered loads · CPC title

• G11C5/141 Primary

  Battery and back-up supplies · CPC title

• G01R35/007 Primary

  Standards or reference devices, e.g. voltage or resistance standards, "golden references" · CPC title

• G01R1/28

  Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform · CPC title

• G01R31/3835

  involving only voltage measurements · CPC title