Conductive Fixation Member for Battery Grounding
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Solution Overview
Problem
Compact and restrictive placement requirements in high-voltage battery systems of electric and hybrid electric vehicles pose challenges for establishing a reliable electrical ground connection for battery monitoring systems and other electronic assemblies.
Innovation Solution
A system and method utilizing an electrically conductive fixation member with a flexible contact terminal to establish an electrical ground connection, where the fixation member extends both inside and outside the housing, allowing attachment to a vehicle chassis without additional components, ensuring robust conductivity and tolerance absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If compact placement requirements are imposed on the HV battery system, then the vehicle design meets space constraints, but the electrical ground connection for the BMS becomes difficult to establish
Solution Approach 1:
The patent combines the mechanical fixation function and electrical ground connection function into a single integrated component. The fixation member includes both a mechanical attachment portion (with external threads for securing to the battery housing) and an electrical contact portion (with conductive elements that contact the BMS housing), thereby simultaneously achieving secure mounting and reliable electrical grounding without requiring separate components.
Solution Approach 2:
The fixation member is designed as a multi-functional component that performs multiple roles: (1) mechanical fixation of the BMS to the battery housing, (2) electrical ground connection between the BMS and battery system, and (3) structural support within the compact assembly. This universal design allows a single component to address both space constraints and electrical connection requirements.
2Reliability
If additional components are added to establish ground connection, then reliable electrical connection is achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines the mechanical fixation function and electrical ground connection function into a single integrated component. The fixation member includes both a mechanical attachment portion (with external threads for securing to the battery housing) and an electrical contact portion (with conductive elements that contact the BMS housing), thereby simultaneously achieving secure mounting and reliable electrical grounding without requiring separate components.
Solution Approach 2:
The fixation member is designed as a multi-functional component that performs multiple roles: (1) mechanical fixation of the BMS to the battery housing, (2) electrical ground connection between the BMS and battery system, and (3) structural support within the compact assembly. This universal design allows a single component to address both space constraints and electrical connection requirements.
3Reliability
If additional components are added to establish ground connection, then reliable electrical connection is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the mechanical fixation function and electrical ground connection function into a single integrated component. The fixation member includes both a mechanical attachment portion (with external threads for securing to the battery housing) and an electrical contact portion (with conductive elements that contact the BMS housing), thereby simultaneously achieving secure mounting and reliable electrical grounding without requiring separate components.
Solution Approach 2:
The fixation member is designed as a multi-functional component that performs multiple roles: (1) mechanical fixation of the BMS to the battery housing, (2) electrical ground connection between the BMS and battery system, and (3) structural support within the compact assembly. This universal design allows a single component to address both space constraints and electrical connection requirements.
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 solution provides a direct, cost-effective, and simplified electrical ground connection that addresses the compact placement constraints, ensuring reliable operation and ease of installation while maintaining electromagnetic compatibility.
Implementation Method 1
an electrically conductive feature configured for attachment to the circuit assembly, the electrically conductive feature comprising a flexible contact terminal configured to contact the electrically conductive fixation member inside the housing
Data Source
AI summary
A system is described for providing an electrical ground connection for a circuit assembly. The system may include a housing for the circuit assembly, the housing having an electrically conductive fixation member configured for attachment to an electrically conductive element outside the housing. The system may also include an electrically conductive feature configured for attachment to the circuit assembly, the electrically conductive feature comprising a flexible contact terminal configured to contact the electrically conductive fixation member inside the housing. Attachment of the electrically conductive fixation member to the electrically conductive element outside the housing enables an electrical ground connection for the circuit assembly via the electrically conductive feature comprising the flexible contact terminal.