Busbar Joining Surface Layout for Corrosion Inhibitor Containment
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Solution Overview
Problem
The connection reliability between voltage detection lines and busbars in battery modules is compromised due to electrolytic corrosion caused by dissimilar metal junctions, which can lead to increased resistance and detachment, especially in coastal environments.
Innovation Solution
A busbar design with a position restriction part to limit the spreading of corrosion inhibitor on the joining surface, ensuring a stable and sufficient coating to protect the joint between the voltage detection line and busbar, made of dissimilar metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the corrosion inhibitor is allowed to spread freely on the joining surface, then the coverage area increases, but the coating thickness becomes insufficient and connection reliability decreases
Solution Approach 1:
The position restriction part creates localized zones with different corrosion inhibitor concentrations. The restriction part prevents excessive spreading in certain areas, maintaining sufficient coating thickness at the joining surface while allowing controlled coverage in other areas, thus achieving both adequate coverage and reliable connection
2Object-affected harmful factors
If the corrosion inhibitor coating is made thicker to prevent corrosion, then corrosion protection improves, but the coating may spread excessively and cause electrolytic corrosion
Solution Approach 1:
The position restriction part segments the joining surface into controlled zones, allowing the corrosion inhibitor to form a thick protective coating only in specific areas where protection is needed, while preventing excessive coating in other areas that could cause electrolytic corrosion
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
Enhances the connection reliability and safety of the battery module by preventing electrolytic corrosion and maintaining a stable electrical connection.
Implementation Method 1
a position restriction part that is provided on at least a part of a periphery of the joining surface and configured to restrict spreading of a corrosion inhibitor that covers the joining surface
Implementation Method 2
a position restriction part that is provided on at least a part of a periphery of the joining surface and configured to restrict spreading of a corrosion inhibitor
Data Source
AI summary
Busbar includes joining surface to which a voltage detection line is to be joined, and position restriction part provided on at least a part of a periphery of joining surface and configured to restrict spreading of a corrosion inhibitor that covers joining surface.