Battery Voltage Determinator with Error Signal Output
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Solution Overview
Problem
Existing battery ECU systems do not provide a method to correct output voltage values when voltage determinators and correctors are configured in separate bodies.
Innovation Solution
A voltage determinator that includes a voltage determination circuit capable of outputting a characteristics signal indicating errors such as offset and gain errors to a separate corrector, allowing for correction of determination voltage, with the corrector using this information to adjust the output voltage values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If voltage determinator and corrector are configured in separate bodies, then device complexity and ease of repair are improved, but the ability to correct output voltage values deteriorates
Solution Approach 1:
The system is divided into separate voltage determinator and corrector units, each performing specific functions. The voltage determinator measures battery voltages while the corrector processes correction values, allowing independent optimization and maintenance of each component without requiring full integration.
Solution Approach 2:
A characteristics signal transmission mechanism serves as an intermediary between the voltage determinator and corrector. This signal carries essential circuit characteristics (offset errors, gain errors) from the determinator to the corrector, enabling the corrector to perform accurate corrections despite the physical separation of components.
2Reliability
If voltage determinator and corrector are integrated in one body, then correction capability is improved, but device complexity and ease of repair worsen
Solution Approach 1:
The integrated system is logically segmented into distinct functional modules (voltage determinator, corrector, characteristics signal processor) that can operate independently. This modular approach within integration allows for targeted maintenance and reduced repair complexity while maintaining correction capabilities.
3Device complexity
If output voltage values are not corrected, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The system performs preliminary characterization of the voltage determination circuit by measuring its offset errors and gain errors before actual voltage measurements. These characteristics are stored and used to pre-calculate correction values, enabling accurate voltage measurements without complex real-time correction processing.
Solution Approach 2:
The corrector uses feedback from the characteristics signal (containing offset and gain error information) to adjust and correct the measured voltage values. This feedback mechanism continuously compensates for circuit imperfections, maintaining high measurement precision while keeping the overall system manageable in complexity.
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
Enables accurate correction of determination voltage, ensuring precise control of battery cell voltages and improving the overall accuracy of battery management systems even when voltage determinators and correctors are separate entities.
Implementation Method 1
a voltage determination circuit configured to determine each inter-terminal voltage of a plurality of battery cells configuring a battery, and output a voltage obtained by amplifying the determined each inter-terminal voltage
Implementation Method 2
an A/D conversion circuit configured to generate a digital signal of the DC voltage as the characteristics signal by performing an A/D conversion on the DC voltage
Data Source
AI summary
A voltage determinator which determines a battery voltage using a voltage determination circuit and is configured to output the determination voltage to a corrector in a separate body includes a characteristics signal generation circuit that is configured to output a characteristics signal indicating characteristics of the voltage determination circuit to the corrector.