Battery Estimation Using Potential Difference Parameters
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Solution Overview
Problem
Conventional battery estimation methods fail to accurately predict the maximum load that can be continuously drawn from a battery over a duration, leading to potential system malfunctions or damage when batteries are used under heavy loads, as they do not account for varying usage conditions.
Innovation Solution
A battery estimation method that calculates the maximum load capable of continuous drawing by obtaining voltage, current, absolute state-of-charge, and battery capacity, using a potential difference parameter term that includes characteristic and compensation parameters to adjust for different discharge conditions, ensuring the battery operates within safe voltage limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional battery estimation methods are used, then the estimation process is simple, but the accuracy of maximum load estimation deteriorates leading to system malfunctions
Solution Approach 1:
The patent applies parameter changes by introducing multiple voltage parameters (third voltage, estimating voltage) and current parameters (third current, first current) along with state-of-charge parameters to dynamically calculate the maximum load. The estimation method transforms fixed conventional parameters into variable parameters that adapt to different battery states, improving estimation accuracy while managing complexity through systematic parameter relationships
Solution Approach 2:
The patent uses the potential difference parameter term as an intermediary element that connects the measured battery parameters (voltage, current, state-of-charge) with the calculated maximum load. This intermediary parameter facilitates the transformation of raw battery data into meaningful load estimation results, resolving the contradiction between simple measurement and accurate estimation
2Reliability
If conventional estimation methods are used, then the system operation is simple, but the reliability deteriorates under heavy load conditions
Solution Approach 1:
The patent applies preliminary action by calculating the estimating voltage and determining the maximum load capability before the battery is actually used under heavy load conditions. This advance estimation allows the system to prepare appropriate termination procedures and load management strategies, ensuring reliability when heavy loads are applied without requiring complex real-time response mechanisms
Solution Approach 2:
The patent implements feedback by using the calculated maximum load capability to inform subsequent battery usage decisions and termination procedures. The estimation results feed back into system control, allowing dynamic adjustment of load management strategies based on accurate battery state assessment, thereby improving reliability without excessive complexity
3Measurement precision
If conventional remaining use time reporting is used, then the information provided is simple, but the accuracy deteriorates when usage conditions change
Solution Approach 1:
The patent applies dynamics by transitioning from static remaining use time reporting to dynamic maximum load capability estimation. The estimation method continuously adapts to different usage conditions by incorporating real-time battery parameters (voltage, current, state-of-charge) and calculating adjusted maximum load values, enabling accurate predictions whether the battery is used lightly or heavily without requiring separate estimation models
Data Source
AI summary
A battery estimation method is provided. The method includes obtaining a potential difference parameter term associated with an estimated absolute state-of-charge for determining a maximum load capable of continuous drawing for a duration of the battery. The potential difference parameter term includes a potential difference characteristic parameter, or the potential difference parameter term includes the potential difference characteristic parameter and a potential difference compensation parameter.