Fast Pyrofuse Triggering with MOSFET Actuation
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Summary
Problems
Existing pyrofuses are difficult to trigger quickly and reliably, especially when multiple fuses need to be triggered simultaneously in energy storage systems, as they require a specific triggering current over a long period, which is challenging to achieve without introducing time delays.
Innovation solutions
An actuating apparatus using a field effect transistor stage, such as a MOSFET, to switch the supply voltage through to the pyrofuse, with voltage stabilizing capacitors to ensure a high gate current and a flip-flop stage to convert temporary sensor signals into permanent triggering signals, allowing for fast and simultaneous triggering of multiple pyrofuses.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a specific triggering current is applied to the pyrofuse, then reliable triggering occurs, but the triggering time is extended
Why choose this principle:
The patent applies preliminary action by pre-charging capacitors (C1, C2) to a higher voltage than the nominal supply voltage before a triggering event occurs. When triggering is required, these pre-charged capacitors immediately discharge through the pyrofuse, providing the necessary high current without waiting for the supply voltage to build up. This eliminates the time delay while ensuring reliable triggering through sufficient current magnitude.
Principle concept:
If multiple pyrofuses are triggered simultaneously, then complete protection is achieved, but the triggering complexity increases
Why choose this principle:
The patent merges multiple triggering functions into a single integrated circuit board design. Multiple pyrofuses share common control logic, power distribution, and signal routing on one circuit board. The control unit can activate any combination of pyrofuses through unified control signals, reducing the complexity that would arise from separate triggering systems for each fuse while ensuring complete protection coverage.
Application Domain
Data Source
AI summary:
An actuating apparatus using a field effect transistor stage, such as a MOSFET, to switch the supply voltage through to the pyrofuse, with voltage stabilizing capacitors to ensure a high gate current and a flip-flop stage to convert temporary sensor signals into permanent triggering signals, allowing for fast and simultaneous triggering of multiple pyrofuses.
Abstract
The present invention relates to an actuating apparatus for triggering at least one pyrofuse, comprising a supply voltage connection for connection to a supply voltage, at least one triggering output for connecting the at least one pyrofuse and applying a triggering current to the pyrofuse, a signal input for receiving a triggering signal which indicates a state which extends the triggering, and at least one actuating circuit, which can be connected to the supply connection, for providing the triggering current at the triggering outlet in accordance with the received triggering signal, wherein said actuating circuit comprises a field-effect transistor stage for connecting the supply voltage through to the triggering output in accordance with the received triggering signal.