Battery Module Frame Assembly for Expansion-Tolerant Fast Grouping
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Solution Overview
Problem
The existing battery module frame structure, formed by welding, has low grouping efficiency and is prone to connection failures due to battery expansion and deformation, which can reduce the service life of the battery.
Innovation Solution
A battery module design featuring a frame assembly with first and second splints connected through clearance fittings, allowing for quick assembly and accommodating battery expansion, with first and second straps to absorb expansion forces and reduce structural damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding method is used to connect splints, then connection strength is improved, but grouping efficiency deteriorates
Solution Approach 1:
The patent replaces the welding mechanical system with a mechanical fastening system using bolts and clearance fittings. This substitution maintains connection strength while dramatically improving assembly efficiency, as mechanical fastening can be performed quickly without complex welding processes
Solution Approach 2:
The splint structure is segmented into multiple connecting plates that can be independently assembled through clearance fittings. This segmentation allows for modular assembly, improving grouping efficiency while maintaining overall structural strength through the distributed connection points
2Stability of the object's composition
If rigid welding connection is used, then structural stability is improved, but adaptability to battery expansion deteriorates
Solution Approach 1:
The patent introduces dynamic elements through clearance fittings and elastic components that allow the splint structure to move and adapt with battery expansion. The connecting plates can shift relative to each other within the clearance fittings, providing dynamic adaptability while maintaining structural stability
Solution Approach 2:
The patent changes the connection parameter from fixed (welding) to variable (clearance fitting with play). This allows the connection to accommodate dimensional changes in the battery during expansion, improving adaptability while the overall frame structure maintains stability
3Reliability
If welding process is used, then connection reliability is improved, but manufacturing complexity deteriorates
Solution Approach 1:
The patent replaces the complex welding process with simpler mechanical fastening using bolts and clearance fittings. This substitution reduces manufacturing complexity by eliminating welding equipment, skill requirements, and post-welding treatments, while maintaining connection reliability through proper mechanical design
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
This design enhances grouping efficiency and extends battery service life by allowing for expansion absorption and distributing expansion forces, thereby preventing connection failures and structural damage.
Implementation Method 1
the two adjacent first connecting plates are spliced and connected through a clearance fitting between the first positioning groove and the corresponding first positioning protrusion
Data Source
AI summary
The present application provides a battery module, a battery pack and a vehicle, the battery module includes a battery and a frame assembly. The frame assembly includes two first splints, two second splints and a first strap. Each first splint includes a plurality of first connecting plates, and the plurality of first connecting plates are arranged side by side in a second direction. One of two adjacent first connecting plates is provided with a first positioning groove, and the other is provided with a first positioning protrusion, and the two adjacent first connecting plates are spliced and connected through a clearance fitting between the first positioning groove and the corresponding first positioning protrusion. This assembly method is simple and fast, which improves a grouping efficiency of the battery module.