Hybrid Vehicle Lower Structure Layout for Battery Space and Heat Protection
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Solution Overview
Problem
In hybrid vehicles, the arrangement of high-voltage devices, in-vehicle equipment, and engine exhaust system components on the lower surface of the floor panel poses challenges in protecting these components from heat damage and securing sufficient space for large battery units, especially when a large battery unit is disposed, making it difficult to accommodate other equipment.
Innovation Solution
The configuration involves arranging in-vehicle equipment in an inclined state between the high-voltage battery unit and the high-voltage device, with the engine exhaust system component and high-voltage device positioned on opposite sides across the vehicle width direction, allowing for compact placement and protection from heat damage, and utilizing a mounting plate that inclines rearward to support the equipment, guiding it to fall rearward during collisions and reducing impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a large battery unit is disposed in the lower surface of the floor panel to gain electric traveling distance, then the electric traveling distance is improved, but it becomes difficult to secure space for disposing in-vehicle equipment
Solution Approach 1:
The in-vehicle equipment is arranged in an inclined state where the upper surface is inclined in the front-rear direction, changing the spatial configuration from a horizontal arrangement to an inclined one. This dimensional change allows the equipment to fit into the available space more efficiently, resolving the contradiction between battery size and equipment space.
2Area of stationary object
If high-voltage devices and in-vehicle equipment are arranged near engine exhaust system components on the lower surface of the floor panel, then space utilization is improved, but the equipment is exposed to heat damage risk
Solution Approach 1:
The engine exhaust system component and the high-voltage device are arranged on opposite sides in the vehicle width direction across the center, creating an asymmetric layout. This asymmetric arrangement ensures that the high-voltage device and in-vehicle equipment are positioned away from the heat-generating exhaust components while still utilizing the available space effectively, thus resolving the contradiction between space utilization and heat protection.
Data Source
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AI summary
[Problem] A structure is provided in which in-vehicle equipment 7 can be disposed even in a hybrid vehicle in which a large battery unit 20 is disposed in a lower surface of a floor panel 11. [Means for Solution] A lower structure for a hybrid automobile in which a high-voltage battery unit 20 is disposed in a lower surface of a floor panel 11 includes an engine exhaust system component which is disposed in front of the high-voltage battery unit 20 in the lower surface of the floor panel 11 and on one vehicle-width-direction side of a center in a vehicle width direction and high-voltage devices 30 and 31 which are disposed in front of the high-voltage battery unit 20 in the lower surface of the floor panel 11 and on another vehicle-width-direction side of the center in the vehicle width direction. In-vehicle equipment 7 is disposed between the high-voltage battery unit 20 and the high-voltage devices 30 and 31, and the in-vehicle equipment 7 is in an inclined state where an upper surface of the in-vehicle equipment 7 is inclined in a front-rear direction such that the in-vehicle equipment 7 has a shorter dimension in the front-rear direction than a dimension in a horizontal state where the upper surface becomes horizontal.