Power Circuit Detection Circuit Abnormality Isolation

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Solution Overview

Problem

In power circuits utilizing switching capacitor circuits, capacitors can become damaged, leading to unsatisfied output power requirements, necessitating a method to detect and isolate defective energy storage elements.

Innovation Solution

A detection circuit is integrated into the power circuit, comprising an abnormality detection circuit that controls paths from energy storage elements to input and output terminals, allowing for the detection of normal or abnormal states by switching off or on these paths and using reference voltages to determine voltage levels, thereby isolating defective elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If switching capacitor circuits are used to generate output power, then power conversion efficiency is improved, but capacitors may become damaged leading to unreliable operation

Engineering Contradiction:
Improvepower conversion efficiencyVSAvoidcapacitor reliability
Core Design Contradiction:
PowerVSReliability

Solution Approach 1:

The patent implements preliminary detection of capacitor health status before complete failure occurs. The detection circuit continuously monitors voltage levels across capacitors and identifies abnormal conditions early, allowing the system to switch to backup capacitors before the primary capacitor completely fails, thus maintaining reliable operation while using switching capacitor circuits for efficient power conversion.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent applies different functional qualities to different parts of the capacitor system. Primary capacitors are used for normal power conversion operations where efficiency is critical, while backup capacitors are kept in standby with detection circuits monitoring their status. This local differentiation allows the system to maximize power conversion efficiency during normal operation while having localized backup mechanisms to ensure reliability when capacitor failure occurs.

Inventive Principle:
Principle #3Local quality

2Reliability

If detection circuits are added to monitor capacitor status, then reliability is improved, but device complexity increases

Engineering Contradiction:
Improvecapacitor status monitoringVSAvoidcircuit complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The detection circuit is designed to serve multiple functions simultaneously. It not only detects capacitor voltage levels to identify failed capacitors but also provides control signals for switching between capacitors and integrates with the existing power management architecture. This multi-functionality reduces the need for separate dedicated components, thereby improving reliability through comprehensive monitoring while minimizing the increase in device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the detection function with the existing power management circuitry. The detection circuit shares control logic and signal pathways with the power management unit, allowing capacitor status monitoring to be integrated into the existing control architecture rather than requiring completely separate monitoring hardware. This merging approach improves reliability through continuous monitoring while avoiding proportional increases in overall device complexity.

Inventive Principle:
Principle #5Merging (Combining)

3Productivity

If multiple energy storage elements are used to ensure continuous power supply, then productivity is improved, but the difficulty of detecting and measuring abnormal states increases

Engineering Contradiction:
Improvecontinuous power supply capabilityVSAvoidabnormal state detection difficulty
Core Design Contradiction:
ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent segments the capacitor monitoring function into individual detection circuits for each capacitor. Rather than attempting to monitor all capacitors simultaneously with a single complex circuit, each capacitor has its own detection pathway that independently measures voltage levels and reports status. This segmentation makes it easier to detect and measure abnormal states in multi-capacitor systems, as each capacitor can be evaluated independently while maintaining continuous power supply capability through the ensemble.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The detection circuit implements feedback mechanisms that continuously monitor capacitor voltage levels and provide real-time status information to the control system. When abnormal voltage levels are detected in any capacitor within the multiple energy storage system, the feedback signal triggers appropriate responses such as switching to backup capacitors or alerting the power management unit. This feedback approach simplifies the detection of abnormal states by providing continuous, automated monitoring of each capacitor's health status.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS11215676B2Power circuit and detection circuit thereof
Publication Date: 2022.01.04 FORCELEAD TECH CORP
  • US11215676B2 patent drawing
  • US11215676B2 patent drawing
  • US11215676B2 patent drawing

AI summary

The present invention relates to a power circuit, which comprises a detection circuit. The detection circuit includes an abnormality detection circuit. The abnormality detection circuit is coupled to an input terminal or/and an output terminal of the power circuit. An input power is provided to the input terminal, and an output power is provided to the output terminal. The abnormality detection circuit controls the paths from a plurality of energy storage elements to the input terminal and the output terminal of the power circuit. The energy storage elements store the energy of the input power to generate the output power. The abnormality detection circuit detects the state of the input power or/and the output power, and cuts off the paths from a portion of the energy storage elements to the input terminal and the output terminal.