Insulation Element Placement for High-Voltage Housing Safety
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Solution Overview
Problem
High-voltage energy accumulators in motor vehicles pose a risk of short-circuits during maintenance or fault conditions due to potential contact with low-voltage or medium-voltage electrical systems, which can lead to damage, as existing safety concepts may fail to recognize double insulation faults in time.
Innovation Solution
An electrically insulating insulation element is strategically placed on the outer side of the high-voltage energy accumulator housing to prevent contact with low-voltage or medium-voltage vehicle electrical system components, using flexible materials like films, felt, or dimensionally-stable plastics that can be easily attached and provide additional functions such as cable holders or heat shields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no additional insulation element is provided on the outer side of the housing, then the device complexity and manufacturing cost remain low, but the risk of short-circuits between high-voltage and low-voltage systems increases during maintenance or fault conditions
Solution Approach 1:
An electrically insulating insulation element is introduced as an intermediary component between the high-voltage housing and low-voltage electrical system components. This mediator prevents direct electrical contact and potential short-circuits, while being strategically placed only in defined regions where low-voltage components are located, thus balancing safety enhancement with structural simplicity.
Solution Approach 2:
The insulation element is not applied uniformly across the entire housing surface but is strategically positioned only in defined regions where low-voltage electrical system components are located. This localized approach provides necessary insulation protection while minimizing additional complexity and material usage.
2Object-affected harmful factors
If an insulation element is added to prevent short-circuits, then the safety against voltage influences improves, but the manufacturing cost and device complexity increase
Solution Approach 1:
The insulation element is implemented as a flexible film or thin insulating layer that can be easily applied to the housing surface in defined regions. This approach provides effective electrical insulation against voltage influences while maintaining ease of manufacture and avoiding significant increases in device complexity.
3Reliability
If the insulation element covers the entire outer side of the housing, then the protection against short-circuits is maximized, but the material usage and manufacturing cost increase
Solution Approach 1:
The insulation element is strategically placed only in defined regions of the housing outer side where low-voltage electrical system components are located. This localized insulation approach provides adequate protection against short-circuits in critical areas while minimizing the quantity of insulation material required compared to full-coverage solutions.
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 effectively reduces the risk of short-circuits between high-voltage and low-voltage systems, enhancing safety while being simple and cost-effective, and allows for flexible adaptation to various geometries and components.
Implementation Method 1
an electrically insulating insulation element, which is arranged in at least one defined region of the outer side of the housing which, when the housing is located in its intended installation location in the motor vehicle, faces toward at least one vehicle electrical system component of a vehicle electrical system comprised by the motor vehicle having a reduced voltage level in relation to the high-voltage energy accumulator
Data Source
AI summary
A housing assembly for a high-voltage energy accumulator of a motor vehicle, wherein the housing assembly comprises a housing for accommodating multiple accumulator modules, which housing comprises an outer side, which, in a state in which the multiple accumulator modules are accommodated in the housing, faces away from the multiple accumulator modules. In this case, the housing assembly includes an electrically insulating insulation element, which is arranged in at least one defined region of the outer side of the housing which, when the housing is located in its intended installation location in the motor vehicle, faces toward at least one vehicle electrical system component of a vehicle electrical system (comprised by the motor vehicle having a reduced voltage level in relation to the high-voltage energy accumulator.