Grooved Battery Pack Case for Flatness and Glue Overflow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing battery pack cases have poor flatness and strength, leading to unevenness during assembly, which causes issues with bus bar welding and excess glue contamination of wiring harnesses and electrical components.
Innovation Solution
A battery pack case design featuring a bottom plate with intersecting first and second grooves that improve rigidity and prevent warp deformation, along with reinforcing beams and a strip plate to collect excess glue, ensuring flatness and preventing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the bottom plate is made flat and simple in structure, then the manufacturing process is simple, but the strength and flatness are poor
Solution Approach 1:
The bottom plate is segmented into multiple regions by adding first grooves extending in the length direction and second grooves extending in the width direction. These grooves divide the bottom plate into multiple regions, improving strength and rigidity without significantly complicating the manufacturing process, as the grooves can be formed through standard stamping or molding operations.
2Strength
If reinforcing beams are welded to improve strength, then the strength increases, but the flatness is greatly affected
Solution Approach 1:
Instead of adding welding reinforcements that distort the surface, the bottom plate is segmented through molded grooves that maintain surface flatness. The grooves provide structural reinforcement while preserving the smooth surface required for battery module assembly and welding operations.
3Ease of manufacture
If the bottom plate has poor flatness, then manufacturing is easier, but bus bar welding quality deteriorates
Solution Approach 1:
The bottom plate is divided into multiple regions by grooves that enhance rigidity and maintain flatness across the surface. This segmentation provides sufficient structural support to ensure uniform surface flatness, enabling high-quality bus bar welding without compromising manufacturing simplicity.
4Ease of manufacture
If glue is coated on the bottom plate to fix battery modules, then assembly is achieved, but excess glue overflows and contaminates wiring harnesses
Solution Approach 1:
The grooves act as intermediary channels that intercept and redirect excess glue away from critical components. When battery modules are assembled with adhesive, any overflow is naturally channeled into the grooves, preventing contamination of wiring harnesses and electrical components while maintaining effective assembly bonding.
Data Source
AI summary
The application relates to a battery pack case and a battery pack. The battery pack case includes: a bottom plate and a side plate connected with the bottom plate, the bottom plate and the side plate surround to form an accommodating portion configured to accommodate a unit cell; the bottom plate is provided with a plurality of first grooves and a plurality of second grooves opening toward the accommodating portion, the plurality of first grooves are spaced apart from each other, the plurality of second grooves are spaced apart from each other, and the first grooves and the second grooves are arranged to cross each other. The bottom plate of the battery pack itself has good rigidity, is not prone to warp deformation, and can prevent the overflow of structural glue from contaminating the wiring harness or electrical components.