Charge Discharge Device Anomaly Localization via Voltage Segmentation
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Solution Overview
Problem
Conventional charge/discharge devices for in-vehicle electronic systems cannot accurately specify the location of anomalies in relays, limiting the ability to diagnose and address operational issues effectively.
Innovation Solution
A charge/discharge device with a drive circuit and an anomaly specification unit that uses power source voltage, relay output, and charge/discharge path voltage to identify anomalies, allowing for precise determination of anomaly locations by analyzing changes in these variables during normal and abnormal operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional relay anomaly determination methods are used, then it is possible to determine whether the relay is operating normally, but the location of the anomaly cannot be accurately specified
Solution Approach 1:
The patent segments the relay control system into multiple measurable components: power source voltage input to the drive circuit, drive circuit output to the relay, and charge/discharge path voltage. By measuring each segment separately and analyzing their relationships, the system can pinpoint the specific location of anomalies rather than merely detecting relay malfunction.
Solution Approach 2:
The patent introduces the drive circuit as an intermediary component between the power source and the relay, with its input and output voltages serving as intermediate measurement points. These intermediary measurements enable the system to identify whether anomalies originate in the power source, the drive circuit itself, or the relay, thereby specifying the anomaly location.
2Measurement precision
If multiple voltage parameters are monitored to specify anomaly locations, then diagnostic precision is improved, but the complexity of the determination system increases
Solution Approach 1:
The control unit performs multiple functions: it controls the charge/discharge circuit operations, generates drive instructions for the relay, and simultaneously analyzes voltage parameters for anomaly detection. By integrating these functions into a single control unit, the system achieves high diagnostic precision without proportionally increasing overall system complexity.
Solution Approach 2:
The system continuously monitors the relationships between power source voltage, drive circuit output voltage, and charge/discharge path voltage, using this feedback information to identify anomalies. The control unit analyzes how these voltages change in response to drive instructions and compares them against expected relationships, enabling precise anomaly localization through feedback-based analysis.
Data Source
AI summary
A charge/discharge device switches between allowing and disallowing charging/discharging of an electrical storage unit by switching a relay with a drive circuit. The device, specifies at the time of an anomaly that prevents the relay from operating normally, the portion in which the anomaly has occurred. A charge/discharge circuit performs a charge or discharge operation on an electrical storage cell in response to instructions. A drive circuit generates a drive current where a drive instruction is given, and supplies the drive current to a relay. A control unit controls the instructions that are given to the charge/discharge circuit and instruction that is given to the drive circuit. An anomaly specification unit specifies the portion where an anomaly has occurred based on the power source voltage that is input to the drive circuit, output that is provided from the drive circuit to the relay, and the voltage of a charge/discharge path.