Traction Battery Pack Header Assembly With Integrated Grounding Link
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Solution Overview
Problem
Existing header assemblies for traction battery packs lack an effective grounding mechanism, which can lead to electrical inefficiencies and potential safety hazards due to the absence of a reliable ground path between the battery pack and vehicle connectors.
Innovation Solution
A header assembly incorporating a grounding link within a polymer-based header base, where the grounding link is made of a more conductive material than the header base, establishing a ground path between the battery pack enclosure and vehicle connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymer-based header base is used, then electrical insulation is improved, but electrical conductivity deteriorates
Solution Approach 1:
The header assembly is segmented into functionally distinct components: the polymer header base provides insulation while the separate grounding link provides conductivity. This segmentation allows each component to optimize its material properties for its specific function without compromise.
Solution Approach 2:
The grounding link acts as an intermediary element that bridges the insulating polymer header base and the conductive battery pack enclosure. It mediates between the conflicting requirements of insulation (from the polymer) and conductivity (needed for grounding) by providing a dedicated conductive path through the insulation barrier.
2Reliability
If a grounding link is added to the header assembly, then grounding reliability is improved, but device complexity increases
Solution Approach 1:
The grounding link is integrated into the header assembly structure, merging the grounding function with the existing header components. The grounding link is positioned to work in conjunction with the header base and battery pack enclosure, combining multiple functions into a unified assembly rather than adding a completely separate system.
Solution Approach 2:
The grounding link serves multiple functions: it provides the grounding path, acts as a structural element within the header assembly, and facilitates electrical connection between the battery pack and vehicle. This multi-functionality reduces the need for additional separate components.
3Object-generated harmful factors
If the grounding link is made more conductive than the header base, then electrical connectivity is improved, but material selection constraints increase
Solution Approach 1:
The material properties of the grounding link are specifically optimized for high electrical conductivity, using materials such as copper or aluminum alloys. This parameter change in material selection is offset by the polymer header base's insulation properties, creating a balanced system where each component's material parameters are optimized for its specific function.
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 proposed solution ensures a reliable and efficient grounding path, enhancing electrical connectivity and safety by utilizing a more conductive grounding link within the header assembly.
Implementation Method 1
the grounding link establishing a ground path between the battery pack enclosure and one or more vehicle connectors that are coupled to the header assembly
Data Source
AI summary
A battery pack assembly includes a header base of a header assembly. The header base is connectable to a battery pack enclosure. The header assembly further includes a grounding link that is contained within the header base. The grounding link establishes a ground path between the battery pack enclosure and one or more vehicle connectors that are coupled to the header assembly.