Drive Circuit Unit Terminal Protrusion for Cable Access
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Solution Overview
Problem
Existing drive circuit units require significant time and effort for operators to attach and detach cables due to the placement of connecting terminals, which are often obscured and difficult to access, especially when the high-power unit is positioned inside the motor room.
Innovation Solution
The drive circuit unit features a first terminal disposed on a front protruding portion in an upward-facing manner, positioned more rearward than the front end of the protruding portion, allowing easier access and visibility, and is integrated with a heat sink for enhanced protection and rigidity, improving operational efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connecting terminals are arranged inside the harness connecting recessed part recessed toward the interior of the drive circuit unit, then terminal protection is improved, but ease of operation deteriorates
Solution Approach 1:
The patent changes the spatial arrangement of connecting terminals from a recessed configuration (inside the drive circuit unit) to a protruding configuration (extending forward from the front surface). This dimensional change allows terminals to be more accessible to operators while still maintaining protection through the integrated heat sink structure, directly resolving the contradiction between terminal protection and ease of cable attachment.
2Device complexity
If connecting terminals are positioned below the dash panel in the motor room, then device integration is improved, but ease of operation deteriorates
Solution Approach 1:
The patent extracts the connecting terminals from the recessed interior of the drive circuit unit and positions them on a front protruding portion that extends forward from the front surface. This extraction makes the terminals visible and accessible to operators when the bonnet is opened, while the terminals remain integrated with the heat sink structure, thus maintaining device integration while improving ease of operation.
3Ease of operation
If connecting terminals are exposed on the front surface, then ease of operation is improved, but terminal protection deteriorates
Solution Approach 1:
The patent merges the connecting terminals with the heat sink by integrating them into the front protruding portion of the heat sink structure. This combination allows terminals to be exposed and accessible on the front surface for ease of operation, while the heat sink structure itself provides protection against direct impact during collisions, thus resolving the contradiction between ease of operation and terminal protection.
Data Source
AI summary
In a drive circuit unit of a vehicle, a first terminal is electrically connected to a drive circuit that performs power conversion, and configured to input or output electric power with respect to the exterior of the drive circuit unit via a first cable. A front protruding portion is formed by extending a portion of a front side surface of the drive circuit unit in a forward direction in a longitudinal direction of the vehicle. The first terminal is disposed on the front protruding portion in an upwardly facing manner, at a more rearward position than a front end of the front protruding portion.