Split Vehicle Battery Unit With Raised Bridge for Propeller Shaft
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Solution Overview
Problem
The installation of high voltage battery units under the center floor of vehicles poses challenges in accommodating a propeller shaft, limiting power transmission to the rear wheel and requiring a separate motor for all-wheel drive, which compromises power performance due to restricted space.
Innovation Solution
A battery unit design with two battery compartments and a connecting portion bent upwardly, incorporating a reinforcing structure and power wire configuration that allows the propeller shaft to pass through, while securing the power wire with studs and a connection patch to prevent damage during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the high voltage battery unit is mounted under the center floor of the vehicle, then the utilization of the trunk or luggage space is maximized, but it becomes difficult to secure space for the propeller shaft, compromising power transmission capability
Solution Approach 1:
The battery case is divided into two separate battery compartments (first and second battery compartments) positioned on opposite sides of the vehicle. This segmentation creates a central space between the compartments that can accommodate the propeller shaft, thus resolving the conflict between maximizing luggage space and maintaining power transmission capability.
Solution Approach 2:
The propeller shaft is nested within the space formed by the battery case structure. The connecting portion of the battery case is bent to be convex upwardly, creating a cavity that houses the propeller shaft while the battery compartments are positioned on either side, effectively nesting the power transmission component within the battery assembly structure.
2Volume of moving object
If the high voltage battery unit is mounted under the center floor outside the vehicle, then luggage space is maximized, but a separate motor must be mounted for rear wheel drive, reducing power performance
Solution Approach 1:
The battery case structure serves multiple functions: it houses the battery compartments, provides structural support, and creates a pathway for the propeller shaft to pass through. This multi-functionality eliminates the need for a separate rear wheel motor, maintaining power performance while maximizing luggage space.
3Adaptability or versatility
If the connecting portion of the battery case is bent upwardly to accommodate the propeller shaft, then power transmission is enabled, but the power wire may be damaged during collisions
Solution Approach 1:
The power wire is pre-positioned within the connecting portion of the battery case before any collision occurs. The connecting portion is specifically designed with sufficient length and structural configuration to ensure the power wire is protected during normal operation and potential collision scenarios, eliminating the need for post-installation adjustments.
Solution Approach 2:
The connecting portion of the battery case acts as a protective structure that cushions the power wire against potential collision forces. By designing the connecting portion with adequate length and structural integrity, the power wire is protected from damage before any collision actually occurs.
Data Source
AI summary
A battery unit for a vehicle is provided. The battery unit includes a lower case having two battery compartments arranged in a direction toward opposite sides of the vehicle, respectively, and a connecting portion bent to be convex upwardly between the two battery compartments. A reinforcing structure is disposed on the connecting portion. Two battery modules are installed in the two battery compartments, respectively and a power wire is electrically connected to at least one of the two battery modules and extends from one of the two battery compartments to the other one of the two battery compartments through the connecting portion.