Battery Pack Housing Structure for Cell Fixation Under Vibration
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Solution Overview
Problem
Existing battery packs face challenges in maintaining mechanical coupling and fixing force against forward-rearward and leftward-rightward vibrations, while also being cost-effective and space-efficient, and require additional components that increase production time and cost.
Innovation Solution
A battery pack design featuring protrusions on cell cartridges fitting into recessed portions of the housing, with spaced end plates and integrated fastening holes, allowing secure fixation and reduced part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional fixing holders and screws are used to secure battery cells, then vibration resistance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent integrates the fixing function directly into the housing structure by forming recessed portions and protrusions as integral parts of the housing and cell cartridge, respectively. This merging of the fixing mechanism into the existing structural components eliminates the need for separate fixing holders and screws, thereby reducing device complexity while maintaining vibration resistance
Solution Approach 2:
The patent extracts the fixing function from separate components (fixing holders and screws) and incorporates it directly into the housing structure through molded recessed portions and protrusions. This extraction simplifies the overall device by removing unnecessary subsidiary parts while preserving the essential fixing capability
2Strength
If multiple screw holes are formed in the housing, then mechanical coupling strength is improved, but manufacturing cost and production time increase
Solution Approach 1:
The patent combines the mechanical coupling function with the housing structure itself by forming recessed portions and protrusions as integral features during the molding process. This eliminates the need for separate fastening operations and components, reducing manufacturing steps and costs while maintaining adequate mechanical coupling strength through the integrated structural design
3Reliability
If additional fixing components are added to secure battery modules, then stability under vibration is improved, but product volume increases
Solution Approach 1:
The patent merges the fixing functionality into the existing housing and cell cartridge structures by incorporating recessed portions and protrusions as integral features. This eliminates the need for additional fixing components that would occupy extra space, thereby maintaining stability under vibration without increasing product volume
4Reliability
If protrusions and recessed portions are formed in cell cartridges and housing, then vibration resistance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by designing the protrusions and recessed portions with specific geometric characteristics at critical locations. The recessed portions in the housing and protrusions on the cell cartridges are shaped to provide adequate engagement and constraint without requiring extremely tight tolerances, achieving vibration resistance through localized structural features rather than uniform high precision throughout
Data Source
AI summary
A battery pack includes a housing having a predetermined space portion, an end plate received in the space portion, the end plate including a horizontal plate located parallel to the bottom surface of the housing and a pair of vertical plates extending from opposite edges of the horizontal plate in a perpendicular direction, and a plurality of cell cartridges received in the end plate so as to be vertically disposed, wherein a plurality of pairs of first recessed portions facing each other is provided in the inner surface of the housing, and protrusions configured to be coupled to the first recessed portions are provided on opposite ends of the cell cartridges in a thickness direction.