Battery Charging Policy Using Anode Potential Limits
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Solution Overview
Problem
Existing rechargeable battery charging technologies face a challenge in achieving fast charging speeds without damaging the battery, as excessively fast charging can lead to issues like lithium plating in lithium batteries.
Innovation Solution
A charging policy setting method that involves obtaining core working parameters under specific charging conditions, determining a maximum charging rate for each charging duration, and setting a charging policy to ensure the anode potential remains above a preset cutoff potential, thereby allowing for fast and efficient charging without battery damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charging speed of the rechargeable battery is increased to save time and improve user experience, then the charging efficiency is improved, but the battery may be damaged (such as causing lithium plating)
Solution Approach 1:
The charging rate is dynamically adjusted based on real-time anode potential monitoring. The system transitions from a static fixed charging rate to a dynamic adaptive charging rate that changes according to battery state, allowing fast charging when safe and reducing rate when risk of lithium plating is detected
Solution Approach 2:
The system implements closed-loop feedback control by continuously monitoring the anode potential during charging and using this information to adjust the charging rate. When the anode potential approaches the cutoff value indicating risk of lithium plating, the system feedback-reduces the charging rate to prevent damage
2Device complexity
If a fixed charging rate is used to simplify charging control, then the device complexity is reduced, but the charging efficiency cannot be maximized
Solution Approach 1:
The battery management system automatically monitors anode potential and self-adjusts the charging rate without user intervention. The system serves itself by using its own monitoring data to make real-time charging decisions, eliminating the need for complex external control mechanisms
Solution Approach 2:
The system changes the charging rate parameter dynamically based on anode potential measurements. Instead of using a fixed charging rate parameter, the system adjusts this parameter in real-time based on battery state, transforming a static parameter into a dynamic one that optimizes charging efficiency
Data Source
AI summary
The present application provides a charging policy setting method and apparatus, relating to the field of batteries. The method includes, obtaining a plurality of different core working parameters upon charging of a target core under a target charging condition at a target charging rate corresponding to the target charging condition; determining a maximum charging rate corresponding to each charging duration under the target charging condition according to the plurality of different core working parameters; and setting a charging policy under the target charging condition according to each charging duration under the target charging condition and the maximum charging rate corresponding to each charging duration. Thus, when the target core is charged at the set charging policy for each charging duration under the target charging condition, the target core is charged at the maximum charging rate corresponding to the charging duration, ensuring a fast charging speed and a high charging efficiency.