Pyro-Fuse Battery Isolation Using Voltage and Current Thresholds
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Solution Overview
Problem
Existing electricity storage apparatuses lack sufficient safety measures to prevent overcharge, overdischarge, and overcurrent conditions, which can lead to potential hazards.
Innovation Solution
An electricity storage apparatus equipped with a voltage sensor, current sensor, and pyro-fuse, controlled by a controller that activates the pyro-fuse based on predetermined voltage and current conditions to interrupt the conductive path, ensuring safety by detecting and responding to abnormal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pyro-fuse is activated based on voltage and current conditions to improve safety, then the reliability of safety protection is improved, but the device complexity increases due to additional sensors and control logic
Solution Approach 1:
The patent applies preliminary action by pre-setting voltage and current conditions that trigger pyro-fuse activation. The controller is programmed with predetermined thresholds for voltage (e.g., overcharge voltage, overdischarge voltage) and current (e.g., overcurrent threshold) before operation. When sensors detect these pre-defined conditions, the pyro-fuse is automatically activated without requiring complex real-time decision algorithms, thus improving safety while limiting complexity growth.
Solution Approach 2:
The patent implements feedback mechanisms through voltage sensors and current sensors that continuously monitor the electricity storage device module and provide real-time data to the controller. This feedback loop enables the controller to compare actual voltage and current values against predetermined conditions and trigger pyro-fuse activation when thresholds are exceeded. The feedback system simplifies control logic by using direct threshold comparison rather than complex predictive algorithms.
2Reliability
If multiple sensors and control conditions are implemented to reduce erroneous pyro-fuse activation, then the reliability of operation is improved, but the device complexity increases
Solution Approach 1:
The patent reduces erroneous activation by pre-configuring multiple voltage and current thresholds in the controller before operation. Instead of using complex real-time analysis to determine when to activate the pyro-fuse, the system relies on pre-established conditions (overcharge voltage, overdischarge voltage, overcurrent threshold) that are set based on the electrical characteristics of the electricity storage device module. This preliminary configuration simplifies the control logic while maintaining high reliability.
Solution Approach 2:
The patent uses feedback from voltage and current sensors to continuously monitor operating conditions and compare them against predetermined thresholds. This feedback mechanism enables reliable detection of abnormal conditions (overcharge, overdischarge, overcurrent) while avoiding false activation through direct threshold comparison. The feedback system provides a simple yet effective way to distinguish between normal and abnormal operating conditions without requiring complex decision algorithms.
3Speed
If the pyro-fuse is activated based on predetermined voltage and current conditions, then the response time to abnormal conditions is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent achieves fast response time by pre-configuring voltage and current thresholds in the controller before the electricity storage apparatus begins operation. The predetermined conditions (overcharge voltage, overdischarge voltage, overcurrent threshold) are set based on the electrical characteristics of the electricity storage device module, eliminating the need for complex real-time analysis. When sensors detect these pre-defined conditions, the pyro-fuse is immediately activated, providing rapid protection while keeping control logic simple and manufacturing requirements manageable.
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 apparatus provides enhanced safety by accurately detecting and responding to overcharge, overdischarge, and overcurrent conditions, reducing the risk of erroneous pyro-fuse activation and improving overall safety.
Implementation Method 1
The pyro-fuse is activated when both the voltage condition and the current condition are satisfied
Data Source
AI summary
An electricity storage apparatus includes an electricity storage device module, a voltage sensor, a pyro-fuse, and a controller. The voltage sensor detects a voltage value of the electricity storage device module. The current sensor detects a current value flowing in the electricity storage device module. The pyro-fuse is connected in series to the electricity storage device module. The controller sets a voltage condition and a current condition. The voltage condition is predetermined based on the voltage value detected by the voltage sensor. The current condition is predetermined based on the current value detected by the current sensor. The controller causes the pyro-fuse to activate when both the voltage condition and the current condition are satisfied.