Electric Straddled Vehicle Layout for Dry PCU Connections
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Solution Overview
Problem
In electric straddled vehicles, the motor control unit (PCU) is typically positioned low, risking electrical connections to get wet during water exposure, and raising the vehicle's center of gravity when moved higher.
Innovation Solution
The motor control unit is positioned in front of the motor and battery, overlapping with them in the front-rear direction, keeping electrical connections high and the battery lower, thus lowering the vehicle's center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor control unit is disposed at a low position under the motor and battery, then the electrical connection between the PCU and battery is protected from water exposure, but the center of gravity of the vehicle is raised
Solution Approach 1:
The motor control unit is repositioned from a vertical arrangement (under the battery) to a horizontal arrangement (in front of the motor and battery, overlapping in the front-rear direction). This dimensional change allows the PCU to be at a high position for water protection while the battery remains low to maintain center of gravity, resolving the contradiction between reliability and stability.
2Reliability
If the motor control unit and battery are disposed at a high position, then the electrical connection is protected from water, but the center of gravity of the vehicle is raised
Solution Approach 1:
The patent segments the power system components into distinct spatial zones: the motor control unit is positioned in the front zone at a high elevation for water protection, while the battery is positioned in the rear zone at a low elevation to maintain center of gravity. This segmentation allows each component to be optimized independently for its specific function, resolving the contradiction between protection and weight distribution.
Data Source
AI summary
An electric straddled vehicle includes a wheel, a motor, a battery, and a motor control unit. The motor drives the wheel. The battery is disposed above the motor. The motor control unit is disposed in front of the motor and the battery. The motor control unit overlaps with the motor and the battery in the front-rear direction of the vehicle.