Battery Capacity Reporting Correction for Variable Low Temperatures
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Solution Overview
Problem
Battery algorithms set for a single low temperature during manufacturing fail to account for variable low temperatures in actual use, leading to abnormal capacity jumps and shortened power supply duration, potentially causing instantaneous power loss.
Innovation Solution
Implement a capacity correction process using a processor to read battery temperature and voltage, determining a preset condition, and correcting the reported capacity to maintain stable power supply and prevent abnormal jumps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If battery algorithm parameters are set according to a single low temperature during manufacturing, then the battery gauge can operate with a fixed algorithm, but the remaining capacity will jump abnormally when the temperature changes to a different low temperature
Solution Approach 1:
The patent implements a dynamic battery algorithm that adapts to changing temperature conditions. The processor dynamically selects different algorithm parameters based on the detected temperature range, transitioning from a static single-temperature algorithm to a multi-temperature adaptive algorithm. This resolves the contradiction by maintaining ease of manufacture through automated parameter selection while improving reliability through temperature-compensated capacity calculation.
Solution Approach 2:
The patent changes the algorithm parameters based on temperature conditions. Different low-temperature ranges (e.g., -10°C to -20°C, -20°C to -30°C, -30°C to -40°C) have different compensation parameters. This parameter adaptation allows the battery gauge to accurately calculate remaining capacity across varying low-temperature environments without requiring manual reconfiguration, resolving the contradiction between fixed manufacturing setup and variable operational conditions.
2Device complexity
If the battery algorithm is not sufficient for variable low temperatures, then the device structure remains simple, but the power supply duration is greatly shortened and the device may be powered off instantaneously
Solution Approach 1:
The patent implements a feedback mechanism where the processor continuously monitors temperature and voltage conditions, compares them against threshold values, and adjusts the capacity calculation accordingly. When abnormal conditions are detected (such as temperature-voltage combinations indicating algorithm insufficiency), the system provides feedback to correct the capacity estimation. This feedback loop prevents premature shutdown decisions, maintaining simple device structure while ensuring accurate power supply duration assessment.
Solution Approach 2:
The patent performs preliminary capacity correction by detecting potential algorithm insufficiency conditions before they cause abnormal shutdowns. The processor proactively identifies when temperature and voltage conditions fall outside the reliable range of the current algorithm and pre-corrects the capacity calculation. This preliminary intervention prevents the harmful effect of instantaneous power-off while maintaining simple device architecture.
3Ease of manufacture
If the battery gauge uses a fixed low temperature parameter, then the manufacturing process is simplified, but the measurement precision of remaining capacity deteriorates under variable low temperature conditions
Solution Approach 1:
The patent creates a universal battery gauge system that can handle multiple low-temperature scenarios through a single multi-functional algorithm. The processor automatically selects appropriate parameters based on detected temperature ranges, making the system universally applicable across different low-temperature environments without requiring different hardware configurations or complex manual parameter setting. This universality maintains ease of manufacture while improving measurement precision through adaptive parameter selection.
Data Source
AI summary
An electronic device includes a battery, a battery gauge, and a processor. The battery is configured to supply power to the electronic device. The battery gauge is configured to gauge the battery to generate a plurality of remaining capacities a battery temperature, and a battery voltage of the battery. The processor is configured to sequentially read the plurality of remaining capacities. The processor determines whether a preset condition is met according to the battery temperature and the battery voltage in a case that a read remaining capacity is equal to a cut-off capacity and a read previous remaining capacity is greater than a preset capacity. The processor performs a capacity correction process in a case of determining that the preset condition is met. The capacity correction process includes using the read previous remaining capacity as a correction capacity and reporting the correction capacity to a system circuit.