Hollow-Frame Battery Pack Housing for Rigid Gas Venting
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Solution Overview
Problem
Conventional battery pack housings are structurally fragile, which poses a risk in the growing electric vehicle market where lithium secondary batteries are increasingly used, necessitating a solution that enhances rigidity while maintaining effective venting of gases generated during combustion.
Innovation Solution
A battery pack housing design featuring a base portion, side beam, and accommodating portion with a hollow structure and thermally deformable material filled inside the frame, allowing for reinforced rigidity and safe gas venting through strategically positioned communication holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a hollow structure is used for the battery pack housing to enable gas flow passage, then gas venting function is improved, but structural rigidity deteriorates
Solution Approach 1:
The patent applies composite materials by filling molten plastic material into the hollow frame structure, creating a composite construction where the frame provides structural support and the injected material provides both structural reinforcement and gas passage functionality. This resolves the contradiction by combining two materials with complementary properties.
Solution Approach 2:
The patent applies local quality by strategically positioning communication holes at specific locations (first communication hole at the end of the side beam, second communication hole at the lower end) rather than uniformly distributing them. This allows the hollow structure to maintain rigidity in critical areas while providing gas venting pathways where needed.
2Object-generated harmful factors
If the battery pack housing is made with a hollow structure for gas passage, then gas flow capability is improved, but structural fragility increases
Solution Approach 1:
The patent applies preliminary action by pre-forming the hollow structure with integrated communication holes before final assembly. The side beam is formed with a hollow interior and predetermined communication holes, allowing the gas passage functionality to be built-in beforehand rather than added later, thus ensuring both gas flow capability and structural integrity from the outset.
Solution Approach 2:
The patent applies composite materials by combining the frame structure with injected molten plastic material, creating a hybrid construction that maintains the hollow space for gas flow while the combined material structure provides enhanced reliability and reduced fragility compared to a simple hollow structure.
3Object-generated harmful factors
If communication holes are added to the hollow structure for gas venting, then gas venting efficiency is improved, but structural integrity may deteriorate
Solution Approach 1:
The patent applies local quality by positioning communication holes at specific strategic locations (end of side beam and lower end) rather than distributing them uniformly throughout the structure. This localized approach allows gas venting efficiency to be improved at critical points while minimizing the impact on overall structural integrity.
Solution Approach 2:
The patent applies segmentation by dividing the gas venting function into multiple discrete communication holes at different locations rather than using a single large opening. This segmented approach allows gas to vent efficiently through multiple pathways while each individual hole maintains sufficient structural integrity.
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 solution provides a battery pack housing with enhanced rigidity and secure gas venting, preventing structural failure and ensuring safety during high-temperature events, while maintaining the integrity of the housing and preventing foreign substance infiltration.
Implementation Method 1
a frame of a hollow structure and a thermally deformable material filled inside the frame
Data Source
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AI summary
A battery pack housing according to an embodiment of the present disclosure includes: a base portion; a side beam formed on an outer circumference of the base portion; and an accommodating portion defined as an internal space surrounded by the base portion and the side beam, wherein at least a portion of one or more of the side beam and the base portion includes a frame of a hollow structure and a thermally deformable material filled inside the frame.