Vehicular Battery Pack Cooling Duct Guide Plate
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Solution Overview
Problem
Existing vehicular battery pack devices face issues with reduced cooling performance due to wind interference and water ingress, as the cooling air discharge outlet is prone to being blocked by the rear bumper, leading to inefficient air flow and potential water exposure.
Innovation Solution
A battery pack device design featuring a subframe with a support frame and guide plate that covers the bottom portion of the battery case, creating a gap between the battery case and rear bumper, with an air discharge duct outlet positioned in a first space surrounded by the guide plate, rear bumper, and rear floor panel, ensuring efficient air discharge and water prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a bottom cover is provided to prevent entrance of travel wind into the space adjacent to the cooling air discharge outlet, then wind interference is reduced, but vibration is transmitted to the bottom cover from the thin rear bumper and cooling air cannot be easily ejected
Solution Approach 1:
The patent introduces a guide plate as an intermediary component between the bottom cover and the rear bumper. The guide plate has a specific shape that guides cooling air flow toward the discharge outlet while the bottom cover blocks travel wind from entering the space between the guide plate and rear bumper. This intermediary structure resolves the contradiction by allowing the bottom cover to block wind without completely sealing the space, thus maintaining cooling air ejection capability.
2Productivity
If the cooling air discharge outlet is opened on the front side of the rear bumper, then cooling air can be discharged, but liquid such as rain water or cleaning water may flow into the power unit through the cooling air discharge outlet
Solution Approach 1:
The guide plate serves as a mediator that directs cooling air flow toward the discharge outlet positioned on the front side of the rear bumper. Simultaneously, the bottom cover acts as a protective intermediary that prevents water from the rear bumper area from flowing forward into the power unit through the discharge outlet, thus resolving the contradiction between cooling effectiveness and water protection.
3Productivity
If the space between the power unit and the rear bumper is open, then cooling air flow is unobstructed, but travel wind impairs the flow of cooling air and lowers cooling performance
Solution Approach 1:
The patent segments the space between the power unit and rear bumper by introducing the guide plate and bottom cover structure. The guide plate creates a defined channel for cooling air flow, while the bottom cover seals the lower portion to prevent travel wind intrusion. This segmentation allows cooling air to flow efficiently through the designated path while blocking harmful travel wind from the general space.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances cooling performance by preventing wind interference and water ingress, ensuring effective air flow and maintaining battery pack dryness, thereby improving the overall cooling efficiency of the battery module.
Implementation Method 1
a cooling wind is introduced into the battery case through the air intake duct and the cooled air is discharged from inside the battery case through the air discharge duct
Data Source
AI summary
A battery pack device in which a battery module is incorporated in a battery case and a rear floor panel is disposed between a rear seat and a back panel that is disposed in a rear of the rear seat, and which is mounted on a vehicle body via a subframe so as to be disposed in an opening of the rear floor panel, and is provided with an air intake duct through which to send a cooling wind to inside the battery case and an air discharge duct through which to discharge air from inside the battery case, wherein the subframe is provided as defined herein, a bottom cover is attached to the subframe as defined herein, a rear end portion of the bottom cover is provided as defined herein, and an air outlet of the air discharge duct is opened as defined herein.