Search

KR-102962745-B1 - ELECTRONIC APPARATUS PERFORMING BATTERY ESTIMATION AND OPERATING METHOD THEREOF

KR102962745B1KR 102962745 B1KR102962745 B1KR 102962745B1KR-102962745-B1

Abstract

A method of operating an electronic device is disclosed. One embodiment charges a battery in a CC charging mode, and while charging the battery in the CC charging mode, repeatedly updates the full charge SOC of the battery, and when the measured voltage value of the battery is greater than or equal to a cutoff voltage value, switches from the CC charging mode to a CV charging mode, charges the battery in the CV charging mode, and while charging the battery in the CV charging mode, repeatedly updates the full charge SOC.

Inventors

  • 김진호
  • 송태원

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260511
Application Date
20220520
Priority Date
20220509

Claims (20)

  1. In the method of operating an electronic device, Step of charging the battery in CC (constant current) charging mode; A step of repeatedly updating the full charge state of charge (SOC) of the battery while charging the battery in the above CC charging mode; If the measured voltage value of the battery is greater than or equal to the cut-off voltage value, the step of switching from the CC charging mode to the CV (constant voltage) charging mode and charging the battery in the CV charging mode; and Step of repeatedly updating the full charge SOC while charging the battery in the above CV charging mode Includes, The step of repeatedly updating the full charge SOC in the above CC charging mode is, A step of calculating a predicted OCV (open-circuit voltage) value when the battery is fully charged based on the average resistance value, the cutoff voltage value, and the cutoff current value of the battery during the first section when the first section of the CC charging mode has elapsed; and A step of updating the full charge SOC to a first full charge SOC value based on the above OCV prediction value including, Method of operation of an electronic device.
  2. delete
  3. In paragraph 1, The step of repeatedly updating the full charge SOC in the above CC charging mode is, A step of calculating a resistance value using the measured voltage value, estimated OCV value, and measured current value of the battery at each of several time points within the first section; and Step of calculating the average resistance value by averaging each of the above calculated resistance values including, Method of operation of an electronic device.
  4. In paragraph 1, The step of calculating the above OCV prediction value is, A step of performing multiplication of the above average resistance value and the above cutoff current value; and A step of calculating the difference between the above cutoff voltage value and the above multiplication result value as the above OCV prediction value. Includes, The step of updating to the above-mentioned first full-charge SOC value is, A step of determining the SOC corresponding to the predicted OCV value using correlation information between SOC and OCV, and updating the full-charge SOC to the first full-charge SOC value according to the determined SOC. including, Method of operation of an electronic device.
  5. In paragraph 1, The step of repeatedly updating the full charge SOC in the above CV charging mode is, A step of comparing a first measured current value of the battery being charged in the above CV charging mode with a current value of a preset starting point to determine whether the battery has reached the preset starting point; When the battery reaches the preset starting point, a step of setting a point for updating the full charge SOC; A step of determining whether the battery has reached the set point; When the battery reaches the set point, a step of predicting the time of full charge of the battery and predicting the remaining SOC remaining until full charge of the battery based on the predicted time of full charge; and A step of updating the full charge SOC based on the predicted remaining SOC. including, Method of operation of an electronic device.
  6. In paragraph 5, The step of repeatedly updating the full charge SOC in the above CV charging mode is, Step of setting the next point for updating the above full charge SOC; When the battery reaches the next point set above, a step of predicting the time of full charge of the battery again, and predicting the remaining SOC remaining until full charge of the battery again based on the predicted time of full charge; and Step of updating the full charge SOC again based on the above-mentioned remaining SOC including, Method of operation of an electronic device.
  7. In paragraph 5, The step of predicting the above remaining SOC is, A step of predicting the full charge time based on a first time value when the battery reaches the preset starting point, a second time value when the battery reaches the preset point, a converted value of the first measured current value, a converted value of the result value derived by subtracting a certain value from the first measured current value, and a converted value of the cutoff current value; and A step of predicting the remaining SOC based on the above predicted full charge time, the above second time value, the above result value, and the above cutoff current value. including, Method of operation of an electronic device.
  8. In Paragraph 7, Each of the above-mentioned first measured current value conversion value, the above-mentioned result value conversion value, and the above-mentioned cutoff current value conversion value represents a value obtained by converting each of the above-mentioned first measured current value, the above-mentioned result value, and the above-mentioned cutoff current value into a logarithmic scale, Method of operation of an electronic device.
  9. In Paragraph 7, The step of predicting the full charge time mentioned above is, A step of calculating a first difference value between the converted value of the cutoff current value and the converted value of the first measured current value; A step of calculating a second difference value between the converted value of the above result value and the converted value of the first measured current value; A step of calculating a third difference value between the second time value and the first time value; A step of predicting the full charge time using the calculated first difference value, the calculated second difference value, the calculated third difference value, and the first time value. including, Method of operation of an electronic device.
  10. In paragraph 1, The method of updating the full charge SOC in the above CC charging mode and the method of updating the full charge SOC in the above CV charging mode are different. Method of operation of an electronic device.
  11. In paragraph 1, A step of determining whether the battery is fully charged while charging the battery in the above CV charging mode; When the battery is fully charged, a step of determining the RSOC of the battery using the most recently updated full charge SOC, the ASOC of the battery updated using a battery model, and the unusable SOC; and Step of providing the above-determined RSOC to the user including, Method of operation of an electronic device.
  12. In the method of operating an electronic device, Step of charging the battery in CC charging mode; A step of updating the full charge SOC of the battery according to the first method while charging the battery in the above CC charging mode; If the measured voltage value of the battery is greater than or equal to the cutoff voltage value, the step of switching from the CC charging mode to the CV charging mode and charging the battery in the CV charging mode; and A step of updating the full charge SOC according to a second method different from the first method while charging the battery in the above CV charging mode. Includes, The step of updating the full charge SOC according to the first method above is: A step of calculating a predicted OCV value when the battery is fully charged based on the average resistance value, the cutoff voltage value, and the cutoff current value of the battery during the first section when the first section of the CC charging mode has elapsed; and A step of updating the full charge SOC to a first full charge SOC value based on the above OCV prediction value including, Method of operation of an electronic device.
  13. delete
  14. In Paragraph 12, The step of updating the full charge SOC according to the first method above is: A step of calculating a resistance value using the measured voltage value, estimated OCV value, and measured current value of the battery at each of several time points within the first section; and Step of calculating the average resistance value by averaging each of the above calculated resistance values including, Method of operation of an electronic device.
  15. In Paragraph 12, The step of calculating the above OCV prediction value is, A step of performing multiplication on the above average resistance value and cutoff current value; and A step of calculating the difference between the above cutoff voltage value and the above multiplication result value as the above OCV prediction value. Includes, The step of updating to the above-mentioned first full-charge SOC value is, A step of determining the SOC corresponding to the predicted OCV value using correlation information between SOC and OCV, and updating the full-charge SOC to the first full-charge SOC value according to the determined SOC. including, Method of operation of an electronic device.
  16. In Paragraph 12, The step of updating the full charge SOC according to the second method above is, A step of comparing a first measured current value of the battery being charged in the above CV charging mode with a current value of a preset starting point to determine whether the battery has reached the preset starting point; When the battery reaches the preset starting point, a step of setting a point for updating the full charge SOC; A step of determining whether the battery has reached the set point; When the battery reaches the set point, a step of predicting the time of full charge of the battery and predicting the remaining SOC remaining until full charge of the battery based on the predicted time of full charge; and A step of updating the full charge SOC based on the predicted remaining SOC. including, Method of operation of an electronic device.
  17. In Paragraph 16, The step of predicting the above remaining SOC is, A step of predicting the full charge time based on a first time value when the battery reaches the preset starting point, a second time value when the battery reaches the preset point, a converted value of the first measured current value, a converted value of the result value derived by subtracting a certain value from the first measured current value, and a converted value of the cutoff current value; and A step of predicting the remaining SOC based on the above predicted full charge time, the above second time value, the above result value, and the above cutoff current value. including, Method of operation of an electronic device.
  18. In Paragraph 17, Each of the above-mentioned first measured current value conversion value, the above-mentioned result value conversion value, and the above-mentioned cutoff current value conversion value represents a value obtained by converting each of the above-mentioned first measured current value, the above-mentioned result value, and the above-mentioned cutoff current value into a logarithmic scale, Method of operation of an electronic device.
  19. In Paragraph 17, The step of predicting the full charge time mentioned above is, A step of calculating a first difference value between the converted value of the cutoff current value and the converted value of the first measured current value; A step of calculating a second difference value between the converted value of the above result value and the converted value of the first measured current value; A step of calculating a third difference value between the second time value and the first time value; A step of predicting the full charge time using the calculated first difference value, the calculated second difference value, the calculated third difference value, and the first time value. including, Method of operation of an electronic device.
  20. In Paragraph 12, A step of determining whether the battery is fully charged while charging the battery in the above CV charging mode; When the battery is fully charged, a step of determining the RSOC of the battery using the most recently updated full charge SOC, the ASOC of the battery updated using a battery model, and the unusable SOC; and Step of providing the above-determined RSOC to the user including, Method of operation of an electronic device.

Description

Electronic apparatus performing battery state estimation and method of operating the same The following disclosure relates to an electronic device and a method for estimating the battery state thereof. To optimize battery operation, the state of the battery can be estimated, and there are various methods for estimating this state. For example, the state of a battery can be estimated by integrating the battery's current or by using a battery model (e.g., an electrical circuit model or an electrochemical model). Related prior art is Japanese Published Patent Application No. 2022-002460 (Title of invention: charging control device, secondary battery, electronic device, and control method, Date of publication: January 6, 2022). FIG. 1 is a drawing for explaining an electronic device according to one embodiment. FIGS. 2 to 3c are diagrams for schematically illustrating ASOC estimation, full charge SOC (SOCmax) estimation, and RSOC estimation of an electronic device according to one embodiment. FIGS. 4a and 4b show the SOCmax of an electronic device in a first charging section according to one embodiment. This is a diagram to explain the estimation behavior (or update behavior). FIGS. 5 to 7 show the SOCmax of an electronic device in a second charging section according to one embodiment. This is a diagram illustrating the performance of an estimation operation (or update operation). FIGS. 8 and 9 are flowcharts for explaining the SOCmax estimation operation (or update operation) of an electronic device according to one embodiment. FIG. 10 is a block diagram illustrating the configuration of an example of an electronic device according to one embodiment. FIG. 11 is a block diagram illustrating the configuration of a first circuit of an electronic device according to one embodiment. FIG. 12 is a drawing for explaining a vehicle according to one embodiment. FIG. 13 is a flowchart illustrating a method of operation of an electronic device according to one embodiment. Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, actual implementations are not limited to the specific embodiments disclosed, and the scope of this specification includes modifications, equivalents, or substitutions included in the technical concept described by the embodiments. Terms such as "first" or "second" may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first component may be named the second component, and similarly, the second component may be named the first component. When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to or coupled with that other component, or that there may be other components in between. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification. Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical components are given the same reference numeral regardless of the drawing number, and redundant descriptions thereof will be omitted. FIG. 1 is a drawing for explaining an electronic device according to one embodiment. Referring to FIG. 1, an electronic device (100) according to one embodiment includes a battery (110), a state estimator (120), and a charger (130). The electronic device (100) is a device that uses a battery (110), and may be, for example, a mobile phone, smartphone, tablet, laptop, personal computer, e-book device, smart watch, smart glasses, HMD (head-mounted display), smart speaker, smart TV, or smart refrigerator, electric vehicle, autonomous vehicle, smart kiosk, IoT (internet of things) device, WAD (walking assist device), drone, or robot. The battery (110) may be one or more battery cells, battery modules or battery packs. The charger (130) charges the battery (110). Although not shown in FIG. 1, the electronic device (100) may be con