Converter Positioning to Shorten DC Harness in EV Motor Rooms
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Solution Overview
Problem
Conventional electric vehicle component mounting arrangements result in a long electrical harness between the converter and the drive power supply battery due to the vertical stacking of the inverter and converter, leading to increased length and potential energy losses, manufacturing costs, and complexity in routing the harness.
Innovation Solution
The arrangement positions the converter between the inverter and the drive power supply battery, with the converter standing vertically and closer to the battery, reducing the length of the low-voltage DC electrical harness by placing it outside the motor room on the cabin side, allowing for a more compact and efficient layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inverter and converter are vertically stacked above the motor, then the motor room space utilization is improved, but the electrical harness length between converter and drive power supply battery increases
Solution Approach 1:
The patent changes the spatial arrangement from vertical stacking (one dimension) to a combination of vertical and longitudinal positioning. The converter is placed between the inverter and drive power supply battery in the longitudinal direction, creating a two-dimensional spatial optimization that reduces harness length while maintaining compact motor room layout.
Solution Approach 2:
The converter serves as an intermediary component positioned between the inverter and the drive power supply battery. By placing the converter in this intermediate position along the longitudinal axis, the patent creates a more efficient electrical connection path, reducing the harness length while maintaining functional relationships between all components.
2Device complexity
If the converter is positioned far from the drive power supply battery, then the motor room component arrangement is simplified, but the electrical harness weight and manufacturing cost increase
Solution Approach 1:
The patent optimizes the longitudinal position parameter of the converter within the motor room, placing it at a specific location between the inverter and drive power supply battery. This parameter optimization reduces the distance the electrical harness must travel, thereby reducing harness weight and manufacturing cost while maintaining acceptable arrangement complexity.
3Ease of operation
If the electrical harness length is increased, then the converter can be positioned for optimal motor room layout, but energy losses in the harness increase
Solution Approach 1:
The patent optimizes the longitudinal position parameter of the converter to minimize electrical harness length while maintaining layout flexibility. By carefully selecting the converter's position between the inverter and drive power supply battery, the patent reduces electrical resistance and energy losses without sacrificing the ability to arrange components effectively within the motor room.
Data Source
AI summary
A vehicle component mounting arrangement is provided with a motor, an inverter, a converter and a drive power supply battery. The motor serves as a vehicle drive source. The inverter is electrically connected to the motor to supply a drive current to the motor. The inverter is vertically arranged above the motor in a vertical direction of a vehicle. The converter is arranged inside a motor room of a vehicle. The drive power supply battery is electrically connected to the converter with an electrical harness. The drive power supply battery is arranged outside the motor room on a side of the motor room that is closer to a vehicle cabin. The converter is further arranged between the inverter and the drive power supply battery with respect to a longitudinal direction of the vehicle.