Battery Parameter Estimation from Operating Data Without HPPC Tests
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for determining battery parameters for equivalent circuit models are time-consuming and difficult to accurately control, requiring separate experiments like HPPC tests.
Innovation Solution
A battery parameter setting apparatus and method that uses battery information such as voltage, current, temperature, and SOC to classify segments and calculate reference and candidate parameters, allowing for quick and accurate setting of battery parameters without the need for separate experiments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If HPPC experiments are performed to determine battery parameters, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent applies preliminary action by pre-collecting and storing battery information data (voltage, current, temperature, SOC) under various operating conditions before actual parameter determination is needed. This pre-prepared data foundation enables rapid parameter calculation without requiring time-consuming HPPC experiments at the moment of need, thus resolving the contradiction between measurement precision and time loss.
Solution Approach 2:
The patent uses copying by creating an equivalent circuit model that replicates battery behavior based on stored historical data. Instead of performing physical HPPC experiments, the system copies the essential electrical characteristics through mathematical modeling, allowing accurate parameter determination without the time penalty of actual experiments.
2Manufacturing precision
If HPPC experiments are performed under controlled conditions, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent applies self-service by enabling the battery management system to automatically determine its own parameters using its own operational data. The system collects, processes, and analyzes its own voltage, current, temperature, and SOC information to calculate equivalent circuit parameters without requiring external experimental equipment or controlled test environments, thus improving ease of operation while maintaining precision.
Solution Approach 2:
The patent applies universality by designing a parameter determination method that works across diverse operating conditions and battery types using the same basic approach. The equivalent circuit model and data processing methodology are universally applicable whether the battery is charging, discharging, at various temperatures, or at different SOC levels, eliminating the need for separate controlled experiments for each condition.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
The present disclosure is directed to a battery parameter setting apparatus and method, which may quickly generate and set a battery parameter most suitable for an equivalent circuit model from battery information without going through a separate experiment such as a HPPC experiment. According to one aspect of the present disclosure, there is an advantage that a battery parameter of an equivalent circuit model more suitable for a current state of a battery may be set.