Battery Charging Interruption Timing for Accurate Parameter Estimation
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Solution Overview
Problem
Existing battery charging control systems lack versatility and efficiency, as they rely on pre-grabbed battery characteristics and intermittently charging, which can prolong the charging time and reduce accuracy in estimating battery parameters.
Innovation Solution
A charging control system that calculates battery parameters like open terminal voltage and internal resistance during intermittent charging, adjusting the charging timing based on the charging rate, voltage, or internal resistance to optimize charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If intermittent charging is performed to calculate battery parameters, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system performs preliminary actions by storing multiple sets of charging interruption timing in advance before actual charging occurs. During charging, the system selects and executes the appropriate pre-planned interruption timing based on real-time battery state, avoiding the need for complex real-time calculations and reducing overall charging time while maintaining parameter measurement accuracy.
Solution Approach 2:
The system dynamically adjusts the charging interruption timing by selecting from multiple pre-stored timing options based on real-time battery state (SOC, temperature, charging rate). This dynamic selection allows the system to optimize the balance between measurement accuracy and charging time for each specific charging scenario, rather than using fixed interruption timing.
2Measurement precision
If charging is temporarily stopped frequently to measure open terminal voltage, then measurement precision is improved, but productivity decreases
Solution Approach 1:
Multiple charging interruption timing options are prepared in advance and stored in the system. This preliminary preparation allows the system to quickly select appropriate interruption points during charging without requiring complex real-time decision-making, thereby maintaining measurement accuracy while minimizing the impact on charging productivity.
Solution Approach 2:
The system changes the parameter of charging interruption timing based on battery state (SOC ranges, temperature conditions, charging rates). By adapting the interruption timing to match optimal measurement points in the battery charging curve, the system achieves accurate open terminal voltage measurements with fewer interruptions, thus maintaining productivity.
3Device complexity
If charging interruption timing is fixed in advance, then device complexity is reduced, but adaptability decreases
Solution Approach 1:
The system stores multiple sets of charging interruption timing for different battery types and charging scenarios in advance. This preliminary preparation of diverse timing options allows the system to maintain simple control logic while achieving high adaptability to different battery characteristics, as the appropriate timing is simply selected from pre-computed options based on battery identification.
Solution Approach 2:
The charging control system is designed with universal adaptability by incorporating multiple pre-stored charging interruption timing sets that can accommodate different battery types, chemistries, and charging requirements. This multi-functional approach allows a single system to serve various battery applications without requiring complex real-time optimization algorithms.
Data Source
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AI summary
Provided is a charging control system and the like that appropriately calculate a battery parameter of a battery while suppressing an increase in a time required for charging the battery. A charging control system (100) includes: a charging control means which calculates a predetermined battery parameter of a battery (21) on the basis of a state quantity of the battery (21) when the battery (21) is intermittently charged, in which the charging control means performs next intermittent charging at a timing different from that of current intermittent charging, and this timing is set on the basis of a charging rate, a voltage, or an internal resistance of the battery (21) when charging is temporarily stopped in intermittent charging of the battery (21) .