Battery Management via Differential SOC Profiles for Anode Identification
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Solution Overview
Problem
Existing battery management systems struggle to accurately identify the type of negative electrode in lithium batteries, leading to improper usage conditions that can cause rapid degradation.
Innovation Solution
A battery management apparatus and method that generates a differential profile based on voltage and State of Charge (SOC) data to judge the type of negative electrode, using predefined criterion profiles to determine if it's natural or artificial graphite-based, and sets optimal usage conditions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the negative electrode type is not identified, then the battery can be used without additional testing, but the battery degradation accelerates due to inappropriate usage conditions
Solution Approach 1:
The patent performs preliminary identification of the negative electrode type by analyzing voltage-SOC profile characteristics before the battery is put into service. This advance detection allows the system to establish appropriate usage conditions in advance, preventing future degradation without requiring additional testing during operation.
Solution Approach 2:
The patent replaces physical inspection or disassembly methods with an electrical measurement-based identification system. By analyzing voltage-SOC profile characteristics through electrochemical measurements, the system can identify the negative electrode type without mechanical intervention, making the process non-invasive and suitable for operational batteries.
2Adaptability or versatility
If the negative electrode type is identified through voltage and SOC behavior analysis, then the battery usage conditions can be optimized, but the complexity of the management system increases
Solution Approach 1:
The patent creates a universal identification method that works for both natural graphite and artificial graphite negative electrodes using the same voltage-SOC profile analysis approach. The system can handle different electrode types, battery chemistries, and application scenarios through a single unified methodology, reducing the need for multiple specialized systems.
Solution Approach 2:
The patent utilizes changes in voltage and SOC parameters during battery operation to identify the negative electrode type. By monitoring how these parameters evolve during charging and discharging cycles, the system can distinguish between different electrode types without requiring additional sensors or complex hardware modifications.
3Quantity of substance
If natural graphite-based negative electrode is used, then the battery capacity is high, but the battery degrades rapidly under rapid charging conditions
Solution Approach 1:
The patent implements a feedback mechanism where the identified negative electrode type informs the charging control strategy. Once natural graphite is identified through voltage-SOC profile analysis, the system automatically adjusts charging rates and voltage limits to prevent rapid degradation, creating a closed-loop control system that adapts to the specific battery chemistry.
Data Source
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AI summary
A battery management apparatus according to an embodiment of the present disclosure includes: a profile generating unit configured to obtain a battery profile representing a correspondence between voltage and SOC of a battery and generate a differential profile representing a correspondence between the SOC and a differential voltage of the SOC based on the obtained battery profile; and a control unit configured to receive the differential profile from the profile generating unit, calculate a degree of association between the differential profile and a preset criterion profile, and judge a type of a negative electrode of the battery based on the calculated degree of association.