Battery Calendar Aging Detection via Charge and Temperature Monitoring
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Solution Overview
Problem
Existing methods fail to reliably and simply determine the calendar aging state of batteries, particularly lithium-ion batteries, which affects their performance and lifespan due to factors like storage conditions and usage patterns.
Innovation Solution
A method involving the automatic measurement and storage of a battery's state of charge and temperature at regular intervals, using an aging function specific to the battery type to determine calendar aging, and adjusting charging behavior based on the aging state to extend battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct measurement of battery aging is performed, then measurement precision is improved, but device complexity and difficulty of detecting increase
Solution Approach 1:
The patent uses charge level and temperature as intermediary parameters to indirectly determine battery aging state. Instead of directly measuring aging, the system measures these accessible parameters and uses an aging function to calculate the aging state, thereby avoiding the complexity of direct aging measurement while maintaining reliability
Solution Approach 2:
The patent replaces complex direct aging measurement mechanisms with a computational approach using an aging function. The system substitutes physical aging measurement with a mathematical model that processes charge level and temperature data to determine aging state, reducing device complexity
2Productivity
If battery is stored at high charge level, then availability is improved, but calendar aging accelerates
Solution Approach 1:
The system continuously monitors charge level and temperature, calculates aging state using the aging function, and provides feedback to the user through notifications. This feedback mechanism enables users to adjust storage conditions to balance availability needs with aging reduction
Solution Approach 2:
The patent changes the storage parameter (charge level) from high to moderate levels to reduce calendar aging. By recommending storage at moderate charge levels rather than high charge levels, the system trades some availability for extended battery lifespan
3Productivity
If battery is stored at high temperature, then operational readiness is improved, but calendar aging accelerates
Solution Approach 1:
The system monitors temperature and provides feedback notifications when high temperature storage is detected, informing users of the accelerated aging risk and suggesting temperature adjustments to preserve battery lifespan
4Duration of action of stationary object
If charging behavior is adjusted to slow aging, then battery lifespan is extended, but charging productivity decreases
Solution Approach 1:
The system applies partial charging actions by recommending moderate charge levels (e.g., 60-80%) rather than full charging. This partial charging approach extends battery lifespan by reducing stress on the battery while still providing sufficient charge for most operational needs
Data Source
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AI summary
The present invention relates to a method for operating a system with a battery, wherein the state of charge and/or temperature of the battery are recorded by automatically measuring and storing the state of charge and/or temperature at several time points, and wherein a calendar aging state of the battery is automatically determined using the stored states of charge and/or temperatures. The present invention further relates to a system for carrying out the method.