Battery Pack Constraint Components for Sealing Stability
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Solution Overview
Problem
Battery packs often experience short circuits due to deformation of the outer cover during charging or discharging, leading to reduced sealing and potential water vapor ingress, which is exacerbated by poor rigidity and large surface area of the outer cover.
Innovation Solution
A battery pack design featuring constraint components with adjustable mounting holes and fasteners that provide a stable pressing force to battery modules, reducing expansion and deformation, and improving assembly efficiency by accommodating fitting errors and machining inaccuracies, while also enhancing sealing and safety through a secure fastening system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outer cover has a large surface area to cover the battery modules, then the sealing ability deteriorates due to deformation during charging or discharging, but reducing the surface area limits the battery pack capacity
Solution Approach 1:
The outer cover is divided into multiple modular sections corresponding to different battery modules, with independent constraint components for each section. This segmentation allows localized deformation control while maintaining overall sealing integrity.
Solution Approach 2:
The constraint components include adjustable mounting holes and fasteners that can dynamically adapt to deformation during charging or discharging. The mounting holes have different adjustment amounts in the arrangement direction, allowing the structure to accommodate dimensional changes while maintaining stable pressing force.
2Stability of the object's composition
If the outer cover has poor rigidity to reduce weight, then deformation increases during charging or discharging, but increasing rigidity adds weight and complexity
Solution Approach 1:
The constraint components feature adjustable mounting holes with different adjustment amounts that enable dynamic adaptation to dimensional changes during battery operation, maintaining stable pressing force without requiring overly rigid structures.
Solution Approach 2:
The mounting holes are designed with varying adjustment parameters in the arrangement direction, allowing the constraint components to accommodate dimensional changes while maintaining effective pressing force on the battery modules.
3Reliability
If traditional fastening systems are used without adjustment capability, then assembly is simple, but fitting errors and machining inaccuracies cause poor sealing and short circuits
Solution Approach 1:
The constraint components incorporate mounting holes with different adjustment amounts that enable dynamic positioning during assembly, accommodating fitting errors and machining inaccuracies while ensuring reliable sealing.
Solution Approach 2:
The varying adjustment parameters of the mounting holes allow assembly personnel to compensate for dimensional tolerances, ensuring proper fit and sealing without requiring extremely precise machining.
4Reliability
If constraint components provide strong pressing force to prevent deformation, then sealing improves, but the structure becomes more complex and difficult to assemble
Solution Approach 1:
The constraint components use adjustable mounting holes that enable dynamic adaptation to dimensional changes, maintaining effective pressing force through a relatively simple fastening structure.
Solution Approach 2:
The different adjustment amounts of the mounting holes allow the constraint components to maintain stable pressing force on battery modules while accommodating dimensional variations, achieving reliable sealing without excessive structural complexity.
Data Source
AI summary
A battery pack, includes a box assembly including a box body and a plurality of fixed beams, a plurality of battery modules, and a plurality of constraint components, each of which includes a limiting portion, a first mounting portion and a second mounting portion. The first mounting portion is provided with a plurality of first mounting holes along a length direction of the fixed beams. The second mounting portion is provided with a plurality of second mounting holes along the length direction. A plurality of first fasteners respectively pass through the first mounting holes and are fixed to one fixed beam. A plurality of second fasteners respectively pass through the second mounting holes and are fixed to the other fixed beam. The first mounting hole and the second mounting hole have different adjustment amounts in the arrangement direction.