Pyrotechnic HV Battery Disconnect With Integrated Trigger Control
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Solution Overview
Problem
Existing systems for electrically drivable motor vehicles face complexity in safely disconnecting high-voltage energy accumulators due to the need for complex coordination of multiple redundant components during short-circuits or overloads, which increases design effort and potential for unintended redundancies.
Innovation Solution
A method and device that utilize a microcontroller to determine and output a triggering signal for a pyrotechnic separating element based on received electrical signals and measured values, integrating detection and interface functions within a single housing to simplify the disconnection process, reducing the need for external component coordination and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple redundant functional components are used to ensure safety during short-circuits or overloads, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple previously separate functional components (detection unit, interfaces, microcontroller, and separating element) into a single integrated device. This integration maintains safety functions while eliminating the need for complex coordination between multiple external components, directly resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The integrated device performs multiple functions within a single housing: detecting electrical signals, processing measured values, determining triggering signals, and actuating the separating element. This multi-functionality replaces the need for multiple specialized components, reducing complexity while maintaining comprehensive safety coverage.
2Reliability
If multiple external components are coordinated to trigger the separating element, then reliability is improved, but the reaction time increases
Solution Approach 1:
By integrating the detection unit, microcontroller, and separating element activation functions into a single device, the patent eliminates signal transmission delays and coordination overhead between external components. The triggering signal is determined and executed within the same housing, significantly reducing reaction time while maintaining safety reliability.
3Reliability
If complex coordination of functional components is implemented, then safety is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent integrates all critical safety functions into a single modular device that can be manufactured as one unit. This eliminates the need for complex assembly and coordination of multiple external components, significantly improving ease of manufacture while maintaining comprehensive safety functionality.
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
This approach simplifies the disconnection of high-voltage energy accumulators by integrating detection and interface functions within a single device, reducing reaction time and eliminating the need for complex high-voltage specifications, thereby enhancing safety and reducing design complexity.
Implementation Method 1
a pyrotechnic separating element (54), which is designed to sever the busbar (42) in dependence on a triggering signal (46)
Data Source
AI summary
The invention relates to a method for operating an electrically drivable motor vehicle. A triggering signal for a pyrotechnic separating element is determined and output with application of a triggering criterion to a received respective electrical signal and/or at least three detected measured values by a microcontroller. A detection unit, two interfaces, and the separating element are electrically coupled to one another centrally via the microcontroller. Depending on the received triggering signal, at least one electrical connecting element is disconnected by the separating element.