Bus Bar Holding Structure Notch Locking Margin
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Solution Overview
Problem
Existing bus bar holding structures with fold-back parts and side edge covering parts have a reduced locking margin due to bent locking parts getting caught on bending R sections, resulting in a lower holding force.
Innovation Solution
A bus bar holding structure with a notch on the fold-back part having a vertical side surface parallel to the peripheral wall of the bus bar storing part, where the locking part, specifically a locking arm, engages with the notch to secure the peripheral edge, enhancing the locking margin and holding force, and an engagement projection positions the bus bar without requiring precise alignment of the peripheral edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking part is bent to lock the bus bar, then the bus bar is held in the bus bar storing part, but the locking part gets caught on the bending R section of the fold-back part, reducing the locking margin and holding force
Solution Approach 1:
The invention extracts the locking function from the bent locking part and relocates it to a dedicated locking projection that is separate from the fold-back part. This separation eliminates the interference between the locking part and the bending R section, allowing the locking projection to engage with the lateral edge of the bus bar without being caught on any curved surfaces, thereby maintaining full locking margin and enhancing holding force.
Solution Approach 2:
The invention introduces a locking projection as an intermediary element between the wire distribution body and the bus bar. This locking projection serves as a dedicated locking mechanism that mediates the connection, engaging with the lateral edge of the bus bar at a position away from the fold-back part, thus avoiding the harmful interaction between the locking part and the bending R section while ensuring reliable holding.
2Reliability
If the peripheral edges of the bus bar are precisely aligned with the peripheral wall of the bus bar storing part, then the holding force is maximized, but the molding cost increases due to stringent dimensional requirements
Solution Approach 1:
The invention applies local quality by creating a specific engagement feature (locking projection) at a localized position on the wire distribution body that engages with a corresponding feature on the bus bar. This localized engagement mechanism ensures proper positioning and holding force without requiring precise alignment of the entire peripheral edge, thereby relaxing dimensional tolerances and reducing molding costs.
Solution Approach 2:
The invention implements preliminary action by providing a locking projection that预先 (in advance) establishes the correct position of the bus bar within the bus bar storing part. This preliminary positioning action ensures that the bus bar is properly held before any subsequent operations, eliminating the need for precise peripheral alignment and reducing the stringency of dimensional requirements for the overall structure.
Data Source
AI summary
A bus bar holding structure includes a bus bar, an insulating resin-made wire distribution body holding the bus bar. The bus bar electrically connects together an adjacent terminals of a plurality of unit cells each having positive pole and negative pole electrode terminals. The bus bar includes a plate-shaped main body and a wire connecting part extended from the plate-shaped main body and connected to an end of a wire. The plate-shaped main body includes a fold-back part and a plurality of plate parts separated from each other at the fold-back part and folded back at the fold-back part so as to be superimposed with each other. The plate-shaped main body and the wire connecting part are formed integrally.