Battery Voltage Misreporting Diagnosis via Time Derivative Analysis
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Solution Overview
Problem
In electric vehicles, inaccurate battery voltage reporting can lead to efficiency losses and potentially dangerous overcharging or explosion, necessitating effective diagnosis and correction of battery monitoring circuit misreporting.
Innovation Solution
A system comprising a battery monitoring circuit, calculation module, and diagnostic module that monitors battery voltage and charge state, performs time derivative calculations, and compares data with expected values to detect misreporting, generating error messages to prevent overcharging and allowing for compensation of faulty readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant battery monitoring circuits are used to combat misreporting, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the diagnostic module continuously monitors battery monitoring circuit data and compares it against expected charge state ranges. When misreporting is detected, the system generates error messages and can limit charging, creating a closed-loop feedback system that improves reliability without requiring redundant hardware circuits.
Solution Approach 2:
The diagnostic module performs self-diagnosis by analyzing its own monitoring data and detecting inconsistencies in battery charge state reporting. This self-service approach allows the system to identify and respond to misreporting issues using its existing monitoring infrastructure, avoiding the need for additional redundant circuits.
2Device complexity
If battery voltage misreporting is not diagnosed, then device complexity remains low, but harmful factors increase due to overcharging and safety risks
Solution Approach 1:
The patent implements preliminary action by continuously monitoring battery charge state data and comparing it against expected ranges before overcharging can occur. The diagnostic module proactively identifies misreporting conditions and can limit charging before dangerous overcharging situations develop, preventing harmful effects rather than just responding to them.
Solution Approach 2:
The diagnostic module acts as an intermediary between the battery monitoring circuit and the charging system. It receives monitoring data, analyzes it for misreporting conditions, and based on its analysis, can generate error messages and limit charging. This intermediary function adds safety without requiring direct modification of the battery or charging hardware.
Data Source
AI summary
Systems and methods for diagnosing battery voltage misreporting is described. According to various embodiments, battery voltage may be monitored with respect to a state of charge and/or time. Based on this monitored information, battery charge state data may be generated by computing time derivatives of the monitored battery voltage across a voltage range. This battery charge state data may be compared with an expected set of charge state data if substantial differences exist, an error may be generated. Other embodiments are described and claimed.