Battery Simulator RC Circuit Simplification for CPU Load Reduction
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Solution Overview
Problem
Battery simulators used in the development of battery management systems for lithium-ion batteries face performance issues due to increased CPU load and memory usage as the number of equivalent circuits increases, requiring costly upgrades in processing performance.
Innovation Solution
An RC parallel circuit optimization device that adjusts the configuration of the RC parallel circuit based on monitoring frequency by deleting capacitance and resistance values, optimizing the circuit to reduce CPU load and memory usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of equivalent circuits is increased to improve simulation accuracy, then the simulation precision is improved, but the CPU load and memory usage increase
Solution Approach 1:
The patent applies dynamics by making the equivalent circuit configuration adjustable based on monitoring frequency. The system dynamically selects between different circuit configurations (full RC parallel circuit for low frequency, simplified circuit for high frequency) to optimize performance for different operating conditions, resolving the contradiction between accuracy and computational load.
Solution Approach 2:
The patent changes the parameters of the equivalent circuit (resistance and capacitance values) based on the monitoring frequency. By adjusting these parameters according to the operating frequency, the system achieves accurate simulation at low frequencies while reducing computational complexity at high frequencies, thereby resolving the technical contradiction.
2Reliability
If the number of equivalent circuits is increased to simulate larger battery configurations, then the simulation fidelity is improved, but the operation speed decreases
Solution Approach 1:
The system dynamically adapts the circuit configuration based on monitoring frequency requirements. For high-frequency monitoring applications where speed is critical, the simplified circuit maintains adequate fidelity while enabling faster operation. For low-frequency applications where maximum fidelity is needed, the full circuit configuration is used.
Solution Approach 2:
By changing the circuit parameters (number of RC parallel circuits, resistance and capacitance values) according to the monitoring frequency, the system optimizes the balance between simulation fidelity and operation speed for different battery configurations and monitoring requirements.
3Speed
If the CPU processing performance is upgraded to handle increased computational load, then the operation speed is improved, but the cost increases
Solution Approach 1:
Instead of upgrading CPU performance, the patent changes the circuit parameters (simplifying the equivalent circuit configuration) to reduce computational load. This approach improves operation speed by optimizing the simulation model itself rather than relying on more powerful hardware, thereby avoiding increased costs.
Solution Approach 2:
The patent creates simplified versions of the equivalent circuit (copying only the essential elements needed for high-frequency monitoring) that maintain adequate simulation accuracy while significantly reducing computational requirements, avoiding the need for expensive CPU upgrades.
Data Source
AI summary
A battery simulator includes a circuit simulator that simulates an operation of an RC parallel circuit which is an equivalent circuit of a battery to be monitored and an RC parallel circuit optimization device that optimizes the RC parallel circuit based on a monitoring frequency of the battery, wherein the RC parallel circuit optimization device is configured to: delete a capacitance value of the RC parallel circuit when the monitoring frequency is determined to be a low frequency, and delete resistance and capacitance values of the RC parallel circuit when the monitoring frequency is determined to be a high frequency.