Laminated Bus-Bar Voltage Measurement Terminals
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Solution Overview
Problem
Existing power conversion apparatuses in hybrid vehicles lack a simple and efficient method to measure bus-bar voltage, leading to increased component count and assembly time due to the need for separate voltage measurement harnesses or terminals.
Innovation Solution
A power conversion apparatus with laminated bus-bars and integrated voltage measuring terminals that extend symmetrically and intersectingly to connect with a circuit board, improving solderability and insulation while reducing component count and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate voltage measurement harness or terminal is connected to the bus-bars, then voltage measurement function is achieved, but the number of components and assembly man-hours increase
Solution Approach 1:
The voltage measurement terminals are integrated directly into the bus-bar structure by branching from the bus-bar itself, merging the measurement function with the power transmission component. This eliminates the need for separate harnesses or terminals, reducing component count and assembly complexity while maintaining voltage measurement capability.
2Volume of moving object
If plate-like bus-bars are routed in a laminated structure, then space utilization is improved, but the configuration becomes complicated making voltage measurement more difficult
Solution Approach 1:
The voltage measurement terminals extend upward from the laminated bus-bar structure in a direction perpendicular to the plane of the bus-bars. This dimensional extension allows measurement terminals to access the circuit board from above, making voltage measurement accessible despite the compact laminated arrangement of the bus-bars.
3Measurement precision
If voltage measuring terminals are extended to connect with circuit board, then voltage measurement is enabled, but thermal resistance of voltage measuring path increases affecting solderability
Solution Approach 1:
The voltage measurement terminals are formed as integral extensions of the bus-bar structure itself, creating a copied pathway for voltage measurement that maintains the excellent thermal and electrical properties of the bus-bar material. This integrated formation ensures good solderability while enabling voltage measurement capability.
Data Source
AI summary
A power conversion apparatus has a configuration in which plate-like bus-bars are laminated via an insulating material to define a pair of bus-bars. A laminated bus-bar, in which the pair of bus-bars is disposed vertically so that a width direction thereof is in a vertical direction, includes a pair of voltage measuring terminals that is correspondingly branched from a part of the pair of bus-bars to extend toward a circuit board. The pair of voltage measuring terminals is arranged symmetrically with respect to the pair of bus-bars to extend upward toward the circuit board, while extending in an intersecting direction intersecting with the pair of bus-bars, to be electrically connected to the circuit board.