Semiconductor Circuit for Battery Cell Voltage Equalization and Discharge Diagnosis
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Solution Overview
Problem
Conventional battery cell monitoring systems face inefficiencies in voltage equalization and discharge control, leading to potential defects and increased processing time and power consumption during diagnostic processes.
Innovation Solution
A semiconductor circuit with a comparator section that compares voltages across battery cells using a resistance element and discharge switching element, along with a reference voltage generation section and grounding, enables effective diagnosis of the discharge section without requiring dedicated components, thereby reducing processing time and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated abnormality diagnostic section is used to diagnose discharge circuit faults, then diagnostic accuracy is improved, but processing time increases and power consumption increases
Solution Approach 1:
The patent combines the diagnostic function with the existing voltage equalization control circuitry. The same comparator and switching elements used for voltage equalization are utilized to perform discharge circuit fault diagnosis, eliminating the need for a separate dedicated diagnostic section and its associated time and power overhead.
Solution Approach 2:
The comparator circuit is designed to serve multiple functions: it performs both voltage equalization control and discharge circuit fault diagnosis. By making the circuit universal, the system achieves accurate diagnostics without requiring additional dedicated components that would increase processing time and power consumption.
2Measurement precision
If dedicated abnormality diagnostic section is used to diagnose discharge circuit faults, then diagnostic accuracy is improved, but power consumption increases
Solution Approach 1:
The diagnostic functionality is merged into the existing voltage equalization control circuit, allowing the system to perform accurate fault diagnosis using the same power resources already allocated for normal operation, thereby avoiding additional power consumption from dedicated diagnostic hardware.
Solution Approach 2:
The system performs self-diagnosis using its own existing operational circuits without requiring external or dedicated diagnostic resources. The comparator and switching elements serve themselves dual purposes, enabling the system to monitor its own health during normal operation without additional energy expenditure.
3Productivity
If conventional voltage equalization control is performed without integrated diagnosis, then processing speed is maintained, but diagnostic capability is insufficient leading to defects
Solution Approach 1:
The patent merges diagnostic functionality with the existing voltage equalization control process, allowing the system to maintain its processing speed while simultaneously performing fault detection. The same operational cycles serve both control and diagnostic purposes, ensuring no loss in productivity.
Solution Approach 2:
The diagnostic function operates continuously during normal voltage equalization control operations rather than requiring separate diagnostic cycles. This continuous operation maintains processing speed while ensuring ongoing system reliability through real-time fault detection.
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
The solution allows for accurate diagnosis of the discharge section, enabling efficient voltage equalization and discharge control while minimizing processing time and power consumption, thus addressing the inefficiencies in conventional systems.
Implementation Method 1
the comparator section compares a threshold voltage, set according to a potential difference between a potential of the first signal line and a potential of the second signal line, with a voltage according to a potential between the resistance element and the discharge switching element
Data Source
AI summary
A semiconductor circuit is provided including a comparator section that compares discharge sections, each including a first signal line connected to a high potential side of each of a plurality of battery cells that are connected in series, a second signal line connected to a low potential side of each of the plurality of battery cells, a resistance element provided between the first signal line and the second signal line, and a discharge switching element connected in series to the resistance element, wherein the comparator section compares a threshold voltage, set according to a potential difference between a potential of the first signal line and a potential of the second signal line, with a voltage according to a potential between the resistance element and the discharge switching element.