Battery Pack Housing Seal With Compressed Resin Groove
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Solution Overview
Problem
Existing battery structures allow impurities to enter through gaps between housings, affecting battery performance.
Innovation Solution
A battery pack design with a first and second housing forming an accommodating space, where a first resin layer is compressed between the housings, inhibiting impurities by being in a state of 20% to 30% compression of its natural length, effectively sealing the gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If two housings are fastened together using fasteners such as screws, then the housing structure is stable and strong, but a gap is left between the two housings allowing impurities to enter
Solution Approach 1:
A resin layer is introduced as an intermediary substance between the first housing and second housing. The resin layer fills the gap that would otherwise exist between the fastened housings, preventing impurity entry while allowing the fasteners to maintain structural connection. The resin acts as a sealing mediator that complements the mechanical fastening system.
Solution Approach 2:
The resin layer functions as a flexible sealing film between the rigid housing components. This thin film structure can deform to accommodate the fastening process while maintaining continuous coverage to block impurity pathways. The flexible nature of the resin allows it to conform to the housing surfaces and maintain seal integrity.
2Object-affected harmful factors
If a resin layer is added between the housings to seal the gap, then impurity entry is prevented, but the device complexity increases
Solution Approach 1:
The sealing function is merged with the existing housing fastening structure. The resin layer is integrated into the assembly process between the housings and fasteners, combining the sealing function with the structural connection function. This eliminates the need for separate sealing components and reduces overall device complexity.
Solution Approach 2:
The resin layer serves multiple functions simultaneously: it seals the gap to prevent impurity entry, provides cushioning between the rigid housing components, and fills void spaces that would otherwise compromise structural integrity. This multi-functionality reduces the need for additional specialized components.
3Object-affected harmful factors
If the resin layer is compressed by 20% to 30% of its natural length, then sealing effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The compression ratio of the resin layer is optimized to a specific parameter range (20%-30% of natural length) that balances sealing effectiveness with manufacturing feasibility. This parameter optimization ensures sufficient compression to close gaps and create seal pressure while remaining achievable with standard manufacturing tolerances and assembly processes.
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 compression of the resin layer effectively prevents impurities from entering the battery pack, enhancing its waterproofing and reducing the impact of impurities on the battery's performance.
Implementation Method 1
the first resin layer within the first groove is in a compressed state, with a compression amount of 20% to 30% of a length of the first resin layer in natural state
Implementation Method 2
the first resin layer is adhesively fixed to an inner wall of the first groove
Data Source
AI summary
A battery pack including a battery module, a first housing, and a second housing, the first housing and the second housing forming an accommodating space for accommodating the battery module. The first housing includes a first edge portion, the first edge portion is provided with a first groove, a first resin layer is provided in the first groove, and the first resin layer is adhesively fixed to an inner wall of the first groove. The second housing includes a second edge portion. The first resin layer is provided between the first housing and the second housing and is connected to the second edge portion, and the first resin layer within the first groove is in a compressed state, with a compression amount of 20% to 30% of a length of the first resin layer in natural state.