EV Battery Compartment Structure With Watertight Panel Layout
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Solution Overview
Problem
Electric vehicles face limitations in travelable distance due to the number of battery modules they can accommodate, and there is a need to ensure watertightness of the battery compartment to prevent moisture ingress.
Innovation Solution
The electric vehicle structure incorporates a chassis frame with a closed curve defining a battery accommodation space, a watertight panel with an inclined wall forming a closed curve around the space, and upper and under covers to ensure watertightness and maximize battery module capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the number of battery modules is increased to extend travelable distance, then the vehicle's range is improved, but the vehicle weight increases
Solution Approach 1:
The patent utilizes the vertical space dimension by positioning the battery module in the lower portion of the vehicle body, specifically in the lower side member region. This vertical arrangement allows maximizing battery capacity without proportionally increasing overall vehicle weight, as the battery is integrated into the existing chassis structure rather than adding separate mounting space.
Solution Approach 2:
The lower side member serves multiple functions: it provides structural support for the vehicle chassis and simultaneously houses the battery module. This multi-functional design allows the battery accommodation space to be integrated into the existing structural components, reducing the need for additional weight-bearing structures.
2Reliability
If a complex sealing structure is used to ensure watertightness, then protection against moisture is improved, but the device complexity increases
Solution Approach 1:
The patent employs a waterproof film as a flexible sealing barrier that is coupled to the lower side member to cover the battery module. This thin film approach provides effective moisture protection without requiring complex rigid sealing structures, maintaining simplicity while ensuring watertightness.
Solution Approach 2:
The waterproof film acts as an intermediary element between the battery module and the external environment. This intermediate sealing layer effectively blocks moisture ingress while allowing the battery to be securely housed without direct exposure to environmental elements.
3Quantity of substance
If the battery accommodation space is maximized to fit more modules, then the travelable distance is improved, but the structural integrity may be compromised
Solution Approach 1:
The patent divides the vehicle body structure into distinct segments, with the lower side member specifically designated for battery accommodation. This segmentation allows the battery housing to be designed as a separate, optimized space that does not compromise the overall structural integrity of the vehicle chassis.
Solution Approach 2:
The battery module is nested within the lower side member structure, utilizing the space efficiently. This nesting arrangement allows the battery accommodation space to be integrated into the existing chassis framework, maximizing space utilization while maintaining the structural strength of the vehicle body.
Data Source
AI summary
An electric vehicle structure includes a chassis frame having a first closed curve that surrounds a battery accommodation space, a watertight panel having another closed curve that surrounds the inside of the closed curve that surrounds the battery accommodation space of the chassis frame, an upper cover coupled to an upper side of the watertight panel and covering an upper side of the battery accommodation space, and an under cover coupled to a lower side of the watertight panel and covering a lower side of the battery accommodation space.