Battery Profile Prediction Using Non-Destructive Electrode Modeling
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Solution Overview
Problem
Existing methods for obtaining positive and negative electrode profiles of battery cells are destructive and time-consuming, posing a risk of explosion and limiting the ability to accurately assess battery degradation.
Innovation Solution
A battery management apparatus and method that adjusts a preset negative electrode profile to generate a positive electrode profile, using conversion functions to predict future battery profiles without destructive disassembly, allowing for more accurate degradation analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conventional method of disassembling battery cells to obtain electrode profiles is used, then accurate positive and negative electrode profiles can be obtained, but the process is time-consuming and poses explosion risks
Solution Approach 1:
The patent uses a negative electrode profile as a reference template and creates a corresponding positive electrode profile through mathematical transformation. Instead of physically disassembling and measuring each electrode separately, the system copies the negative electrode's profile characteristics and transforms them to generate the positive electrode profile, significantly reducing time and eliminating explosion risks while maintaining measurement accuracy
Solution Approach 2:
The patent replaces the mechanical disassembly process with a mathematical transformation approach. By using differential voltage profiles and integration methods, the system substitutes physical electrode separation and measurement with computational algorithms that calculate positive electrode profiles from negative electrode data, eliminating the need for time-consuming manual disassembly and reassembly processes
2Measurement precision
If the conventional destructive disassembly method is used to obtain electrode profiles, then detailed electrode characteristics can be measured, but the battery cell is damaged and cannot be reused
Solution Approach 1:
The patent creates a virtual copy of the negative electrode profile and transforms it mathematically to generate the positive electrode profile. This copying approach eliminates the need for physical destruction of the battery cell, allowing the cell to remain intact and reusable while still obtaining accurate electrode profile data through non-destructive computational methods
Solution Approach 2:
The patent introduces a mathematical transformation process as an intermediary between the negative electrode profile measurement and the positive electrode profile generation. This intermediary computational method allows derivation of positive electrode characteristics without direct physical contact or damage to the electrodes, preserving battery cell integrity while achieving measurement objectives
3Loss of information
If traditional electrode profile acquisition methods are used, then comprehensive battery degradation analysis can be performed, but the process requires battery cell disassembly and reassembly
Solution Approach 1:
The patent extracts only the essential information needed for degradation analysis from the negative electrode profile and uses it to generate the positive electrode profile. By extracting key characteristics such as differential voltage peaks and capacity relationships, the system obtains comprehensive degradation data without requiring the complex processes of disassembly, washing, and reassembly of battery components
4Measurement precision
If conventional electrode profile measurement methods are used, then accurate state of charge and state of health estimation can be achieved, but the process poses safety risks of explosion
Solution Approach 1:
The patent uses the negative electrode profile as a safe reference copy to generate the positive electrode profile through mathematical transformation. This copying method eliminates the need for physical manipulation of battery components that could trigger thermal runaway or explosion, while still providing accurate data for SOC and SOH estimation by maintaining the electrochemical relationships between electrodes
Data Source
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AI summary
A battery management apparatus according to an embodiment of the present disclosure includes: a measuring unit configured to measure voltage and capacity of a battery cell; a profile generating unit configured to generate a battery profile representing a correspondence between the voltage and the capacity measured by the measuring unit and generate a positive electrode profile of the battery cell based on the generated battery profile and a reference negative electrode profile and a reference negative electrode differential profile preset for the battery cell; and a control unit configured to receive the generated positive electrode profile from the profile generating unit, derive a conversion function representing conversion information from the reference positive electrode profile preset for the battery cell to the generated positive electrode profile, generate a positive electrode prediction profile for the battery cell from the reference positive electrode profile based on the derived conversion function, and generate a battery prediction profile for the battery cell based on the generated positive electrode prediction profile.