EV Battery Support Determination Using Voltage and Resistance Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for determining the energy content and power support in electric vehicle batteries are complex and fail to meet safety standards for ASIL B quality, as they rely on cumbersome cell models that are difficult to operate at the required reliability and precision.
Innovation Solution
A method and detection system that measure battery voltage and internal resistance, comparing them to predetermined thresholds using simple mathematical operations and logical operators, ensuring accurate determination of energy and power support, even under varying temperatures, without relying on complex cell models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex cell models are used to determine energy content and power support, then measurement precision may be improved, but device complexity increases and reliability decreases
Solution Approach 1:
The patent extracts only the essential parameters (voltage and internal resistance) needed for determining energy content and power support, eliminating the need for complex cell models. This extraction of critical measurement elements simplifies the system while maintaining measurement precision for the specific purpose of battery support determination.
Solution Approach 2:
Instead of using complex physical cell models, the patent creates simplified mathematical representations (threshold voltages and threshold resistances) that copy only the essential characteristics needed for safety determination. These simplified models achieve the same functional purpose with much lower complexity.
2Measurement precision
If complex cell models are used to determine energy content and power support, then measurement precision may be improved, but reliability decreases due to difficulty in operating at required ASIL B quality
Solution Approach 1:
The patent replaces complex, difficult-to-verify cell models with simple, easily verifiable threshold comparisons. These simplified measurement approaches are more reliable because they can be implemented with basic electronic components that are easier to certify for ASIL B quality, even though they use simpler measurement principles.
Solution Approach 2:
The patent substitutes complex computational models with simple electrical measurements and logical comparisons. By replacing sophisticated software-based cell models with direct electrical parameter measurements and threshold logic, the system achieves higher reliability through simpler, more verifiable operations that are easier to certify for safety standards.
3Device complexity
If simple mathematical operations are used to determine energy and power support, then device complexity is reduced, but measurement precision may worsen
Solution Approach 1:
The patent applies local quality by using simple threshold comparisons specifically for the critical safety parameters (voltage and internal resistance) while maintaining focused measurement precision for these specific quantities. The simplicity is localized to the determination logic, while measurement precision is maintained for the essential parameters through dedicated measurement circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides reliable and precise determination of energy and power support in electric vehicle batteries, meeting ASIL B safety standards by using straightforward mathematical operations and logical checks, thereby improving measurement accuracy and reducing errors.
Implementation Method 1
An electric vehicle is an automobile that is powered by an electric motor using energy stored in rechargeable batteries
Implementation Method 2
measuring a voltage of the battery
Implementation Method 3
determining an internal resistance of the battery
Data Source
AI summary
In a method for determining the support of an energy content and a power of a battery for an electric vehicle, the method includes: measuring a voltage of the battery; comparing the voltage of the battery with a predetermined threshold voltage and determining whether or not the voltage is equal to or larger than the predetermined threshold voltage; determining an internal resistance of the battery; comparing the internal resistance of the battery with a predetermined threshold resistance and determining whether or not the internal resistance is equal to or less than the predetermined threshold resistance; and determining the energy content and the power of a battery of an electric vehicle is supported in response to both the voltage being equal to or larger than the predetermined threshold voltage and the internal resistance being equal to or less than the predetermined threshold resistance.