Semiconductor Circuit for Battery Wire Abnormality Diagnosis
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Solution Overview
Problem
Conventional battery monitoring systems fail to accurately diagnose disconnection and short-circuiting of wires connecting battery cells and semiconductor circuits, as the detection results for both conditions are indistinguishable at the highest and lowest potential sides.
Innovation Solution
A semiconductor circuit with a judgment circuit that includes a microcomputer, CPU, memory, and non-volatile storage, which uses pre-stored relationships of voltage correspondence to differentiate between disconnection and short-circuiting by analyzing output voltage values and applying control signals to diagnose abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional voltage measurement is used to diagnose wire abnormalities, then the measurement process is simple, but disconnection and short-circuiting cannot be distinguished at the highest and lowest potential sides
Solution Approach 1:
The patent segments the diagnosis process into three distinct stages: initial voltage measurement, abnormality detection, and abnormality type identification. By dividing the measurement process into sequential steps with different voltage application conditions, the system can distinguish between disconnection and short-circuiting that would otherwise be indistinguishable using conventional single-stage measurement methods.
Solution Approach 2:
The patent employs dynamic voltage application by changing the voltage conditions based on the measurement stage. Initially, voltages are applied to all wires, then selectively adjusted when abnormalities are detected. This dynamic adjustment of voltage levels allows the system to identify the specific type of abnormality (disconnection vs. short-circuiting) by observing how the system responds to different voltage conditions.
2Ease of operation
If voltage values are compared to determine abnormalities, then the diagnosis method is simple, but indistinguishable results occur at highest and lowest potential sides
Solution Approach 1:
The patent performs preliminary voltage application to all wires before detecting abnormalities. By pre-establishing the voltage state and then selectively adjusting voltages based on detected anomalies, the system maintains operational simplicity while improving diagnostic reliability. The preliminary action creates a baseline state that enables subsequent differentiation of abnormality types.
Solution Approach 2:
The patent implements a feedback mechanism where voltage measurement results inform subsequent voltage application decisions. When an abnormality is detected, the system uses the measurement feedback to determine which wires to adjust and how to apply voltages in the next measurement cycle, enabling reliable distinction between disconnection and short-circuiting while maintaining ease of operation through automated control.
Data Source
AI summary
There is provided a semiconductor circuit including: a selection circuit, to which are connected batteries in series, and which selects any one of the batteries; a difference detecting circuit, to which voltage of a high potential side of the selected battery inputted, and to which voltage of a low potential side of the selected battery is inputted, and which outputs a difference between the voltage at the high-potential side and the voltage at the low-potential side; and a voltage applying unit that applies diagnostic voltage to a wire that is for inputting the high potential voltage to the difference detecting circuit when diagnosing an abnormality of a wire associated with the selected battery if the selected battery is a battery of a highest position in the series or a battery of a lowest position in the series.