Battery Sensor Diagnostic Circuit for Continuous Monitoring
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Solution Overview
Problem
Current battery sensors require interruptions in current and voltage measurement during diagnosis, which disrupt continuous monitoring of battery conditions.
Innovation Solution
A battery sensor with a diagnostic circuit independent of the evaluation module, forming a combination signal from measurement and test signals to determine a control signal for error detection, allowing continuous measurement without interrupting data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the evaluation module is used to diagnose the battery sensor, then the functionality can be verified, but the current and voltage measurement must be interrupted
Solution Approach 1:
The patent divides the diagnostic function into a separate diagnostic circuit that is independent of the evaluation module. This segmentation allows the diagnostic circuit to perform verification functions while the evaluation module continues its normal measurement tasks without interruption, resolving the contradiction between diagnosis capability and continuous measurement productivity
Solution Approach 2:
The patent introduces a combination signal as an intermediary element that bridges the test signal and measurement signals. This combination signal allows the diagnostic circuit to inject test signals without directly interfering with the evaluation module's measurement operations, enabling simultaneous diagnosis and continuous measurement
2Adaptability or versatility
If the third measurement path is used for temperature measurement, then voltage measurement can be temporarily interrupted, but temperature changes are slow and less critical
Solution Approach 1:
The patent makes the third measurement path universal by enabling it to handle both temperature measurement and diagnostic functions. The measurement path can be dynamically configured to receive either temperature signals or combination signals depending on whether temperature monitoring or sensor diagnosis is the priority, providing operational flexibility without sacrificing measurement precision in other paths
Data Source
Figure 1
AI summary
The invention relates to a sensor (10), in particular a battery sensor for determining the state of charge of a battery, in particular a vehicle battery (12), with at least two measuring devices (22, 24, 26) each designed for detecting measurement parameters, in particular battery parameters, and for outputting a measurement signal (28, 30, 32), with a combination circuit (68) that can form a combination signal (93) from at least one measurement signal (28, 30, 32) and/or a test signal (92), with an evaluation module (34) that has several inputs (40, 42, 44) for measurement signals (28, 30, 32) and/or the combination signal (93), an output (72) for a control signal (98), and an evaluation circuit (54) for determining the control signal (98) from the measurement signals (28, 30, 32) and the combination signal (93), and with a diagnostic circuit (70), for comparing the control signal (98) with the test signal (92) and for outputting an error signal (104) .The invention further relates to a method for testing such a sensor.