H-Shaped Battery Pack Housing for Stiffness and Water Tightness
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Solution Overview
Problem
Conventional battery packs lack high stiffness and water tightness while requiring an increased number of parts, and existing electric vehicles using such packs do not efficiently integrate battery assemblies for optimal structural support and cooling.
Innovation Solution
A battery pack design featuring a first case with H-shaped walls, integral flanges, and fins for improved stiffness and cooling, along with a modular structure allowing for compact integration and water tightness, using bus bars and through-holes for efficient assembly and connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If separate members (annular supporting frame and supporting plate) made of different materials are used, then the battery pack can absorb forces and moments, but the stiffness is insufficient and the number of parts increases
Solution Approach 1:
The annular supporting frame and supporting plate are merged into a single integrated member made of fiber-reinforced plastic. This integration reduces the number of separate parts while maintaining the structural capability to absorb forces and moments acting on the battery pack.
Solution Approach 2:
The integrated member is made of fiber-reinforced plastic, which combines the strength and stiffness benefits of both metal and plastic materials. This composite material allows the single component to achieve the force absorption capability previously requiring separate metal and plastic parts.
2Reliability
If separate members are used for structural support, then force absorption is achieved, but water tightness cannot be ensured without additional sealing elements
Solution Approach 1:
The structural support function and sealing function are merged into a single integrated member. The fiber-reinforced plastic structure inherently provides both mechanical strength for force absorption and continuous material structure for water tightness, eliminating the need for separate sealing elements between structural components.
3Strength
If conventional housing structures are used, then basic protection is provided, but stiffness is insufficient
Solution Approach 1:
The fiber-reinforced plastic material provides high stiffness-to-weight ratio, enabling the housing to achieve superior stiffness compared to conventional materials while maintaining a relatively simple single-piece structural design.
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
The design achieves high stiffness and water tightness with reduced parts, enhances cooling performance, and allows for compact and efficient integration of battery assemblies within electric vehicles, facilitating easy installation and maintaining a stable riding posture.
Implementation Method 1
a first case main body including walls having an H-shaped cross section
Implementation Method 2
improves cooling performance
Data Source
AI summary
An electric two-wheeled vehicle includes a battery pack supported by a body frame. The battery pack includes a first case including a first case main body including walls having an H-shaped cross section defined by an enclosed portion including two open ends and a partition dividing an inside of the enclosed portion into a first storage and a second storage, a first flange at an outer circumference of a first end of the first case main body, and a second flange at an outer circumference of a second end of the first case main body. A first plate is fixed to the first flange to close the first storage, and a second plate is fixed to the second flange to close the second storage. A first battery assembly is housed in the first storage and a second battery assembly is housed in the second storage.