Battery Power Display Correction for Extreme Cold Shutdown Prevention
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Solution Overview
Problem
In extremely low temperature environments, electronic devices experience inaccurate battery power detection, leading to abnormal shutdowns due to non-linear battery power depletion, which existing technologies fail to address effectively.
Innovation Solution
A method and device that differentiate between first and second type batteries based on designed power, adjusting displayed power by specific rates when battery cell voltage or capacity parameters exceed thresholds, using a controller and power indicator to correct power display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If battery power is detected in extremely low temperature environment, then power detection function is provided, but detection accuracy deteriorates due to temperature influence causing non-linear power depletion
Solution Approach 1:
The patent applies parameter changes by adjusting the displayed power based on battery temperature parameters. When the battery temperature is below a threshold, the system changes the power display parameter by reducing it at a specific rate, compensating for the non-linear depletion caused by low temperature effects on battery chemistry and detection accuracy.
2Reliability
If displayed power is not adjusted for temperature, then device operation is simple, but abnormal shutdown occurs due to inaccurate power display
Solution Approach 1:
The patent implements feedback by continuously monitoring battery temperature and adjusting the displayed power accordingly. The controller receives temperature feedback from the battery and dynamically corrects the power display based on the temperature condition, ensuring reliable operation while maintaining a relatively simple device architecture.
Data Source
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AI summary
A displayed power correction method, adapted to a target battery with a battery temperature lower than a threshold temperature, is performed by a controller (11) and includes: determining whether the target battery is a first type battery or a second type battery according to designed power of the target battery, lowering displayed power according to a first default rate of the first type battery when the target battery is the first type battery and a battery cell voltage of the target battery is lower than a threshold voltage, and lowering displayed power according to a second default rate of the second type battery when the target battery is the second type battery and a capacity parameter or a voltage parameter of the target battery is higher than a default value.