Battery Capacity Calibration via Dormant State Analysis

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Solution Overview

Problem

Existing methods for calibrating battery capacity in electronic devices require the battery to be fully charged and discharged from 100% to 1%, which is stringent and limits calibration to only fully charged states.

Innovation Solution

A method that determines the actual full charge level of a battery by analyzing its states during dormant periods with zero charging and discharging currents, allowing calibration without the need for a full charge-discharge cycle, using first and second dormant state messages and charge/discharge capacity data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the battery is fully charged and discharged from 100% to 1% for calibration, then the battery capacity calibration can be performed, but the calibration process becomes stringent and time-consuming

Engineering Contradiction:
Improvebattery capacity calibration accuracyVSAvoidcalibration time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by performing calibration during dormant states before full charge-discharge cycles are required. The system captures battery state information during idle periods when charging and discharging currents are zero, preparing calibration data in advance. This allows the calibration process to utilize pre-collected data from dormant states, reducing the need for complete charge-discharge cycles and significantly shortening calibration time while maintaining accuracy.

Inventive Principle:
Principle #10Preliminary action

2Measurement precision

If the battery calibration requires full charge state, then accurate capacity measurement can be achieved, but the calibration can only be conducted in limited conditions

Engineering Contradiction:
Improvebattery capacity measurement accuracyVSAvoidcalibration condition flexibility
Core Design Contradiction:
Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by transitioning from static calibration requirements (fixed full charge state) to dynamic calibration opportunities (any dormant state). The system dynamically captures battery state information during idle periods regardless of charge level, and uses state transition detection between dormant states to perform calibration. This dynamic approach allows calibration to be performed in various charge states (30%, 70%, etc.) as long as dormant state transitions occur, greatly enhancing adaptability while preserving measurement accuracy through state-based calculations.

Inventive Principle:
Principle #15Dynamics

3Measurement precision

If manual intervention is required for battery calibration, then calibration can be performed, but user convenience is reduced

Engineering Contradiction:
Improvebattery capacity calibration accuracyVSAvoidcalibration operation simplicity
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The patent applies self-service by enabling the battery calibration system to automatically detect dormant state transitions, capture battery state information, and perform capacity calculations without user intervention. The system autonomously monitors charging/discharging current levels, identifies when dormant states occur, collects necessary state data, and executes calibration algorithms. This automated self-service approach maintains high measurement accuracy while completely eliminating manual calibration operations, significantly improving user convenience.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS10514422B2Aspects for determining charging capacity of a battery
Publication Date: 2019.12.24 LENOVO (BEIJING) LTD
  • US10514422B2 patent drawing
  • US10514422B2 patent drawing

AI summary

Aspects acquire at least one first battery state when a battery of the electronic device is in a first dormant state; acquire at least one second battery state of the battery in a second dormant state and the charge level or discharge capacity of the battery during the first dormant state and the second dormant state when it is confirmed that the battery enters the non-dormant state from the first dormant state, and enters the second dormant state from the non-dormant state; and calculate the actual full charge level of the battery on the basis of at least the first battery state, at least the second battery state and the charge level or discharge capacity. The technical problem that the calibration of battery capacity can only be conducted in a full charged state for the battery existing in the electronic device in prior art is solved by the above-mentioned technical solution provided in the present invention.