Battery Module End Plate Reinforcement Against Mid-Section Deformation
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Solution Overview
Problem
Current end plates for battery modules are prone to deformation or fracture in the middle when fixing batteries, leading to instability and damage due to the application of force through fixing holes on the sides, which compromises the structural integrity.
Innovation Solution
The end plate design incorporates reinforcing grooves and through holes for reinforcing rods, along with U-shaped and intersecting ribs, to enhance the structural strength of the middle section, and includes fixing structures and limiting assemblies to stabilize the binding strap, ensuring balanced support and reduced deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixing holes are disposed on the left side and right side of the end plate body, then the end plate can be fixed to secure batteries, but the middle of the end plate is prone to deformation or fracture due to internal battery pack abutting from inside toward outside
Solution Approach 1:
The end plate body is segmented into multiple regions through reinforcing grooves that divide the middle section into several compartments. This segmentation distributes the abutting force from the battery pack across multiple smaller areas rather than concentrating it on a single middle point, thereby preventing deformation and fracture while maintaining fixation stability through the side fixing holes.
Solution Approach 2:
Reinforcing structures including ribs and grooves are strategically placed in the middle section of the end plate where the battery pack abuts, creating local quality enhancement. These reinforcing features increase the strength and stiffness specifically in the vulnerable middle region without adding unnecessary complexity to the entire plate structure, resolving the contradiction between overall fixation stability and local middle section strength.
2Strength
If reinforcing structures are added to enhance middle section strength, then deformation and fracture risk are reduced, but the device complexity increases
Solution Approach 1:
The reinforcing structures are merged with the end plate body as an integrated design rather than separate components. The reinforcing grooves and ribs are formed as part of the plate's monolithic structure, eliminating the need for additional fasteners, joints, or assembly steps. This merging approach enhances middle section strength while avoiding the complexity that would arise from adding separate reinforcing components.
Solution Approach 2:
The end plate structure is modified by changing geometric parameters such as adding grooves and ribs that alter the moment of inertia and structural stiffness in the middle section. These parameter changes enhance strength through shape optimization rather than material changes or additional components, thereby improving middle section strength without significantly increasing device complexity.
Data Source
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AI summary
Provided are an end plate for fixing a battery module and a battery module. The end plate for fixing the battery module includes an end plate body. Fixing structures are disposed at two ends of the end plate body. Reinforcing structures are disposed on one side of the end plate body. The reinforcing structures include multiple reinforcing grooves along the Z direction. The reinforcing grooves are arranged in an array along an X direction and a Y direction. At least one accommodation groove is disposed along the Y direction in the middle of the end plate body on the side where the reinforcing structures are located. Coaxial through holes are disposed on groove walls at two opposite ends of the at least one accommodation groove along the Y direction to allow insertion of a reinforcing rod. The reinforcing structures are adjacently disposed on two sides of the at least one accommodation groove. The battery module includes the end plate for fixing the battery module to enhance the supporting strength of the middle of the end plate body, thereby reducing the likelihood of deformation or even fracture in the middle of the end plate body and reducing the risk of damage to the end plate body.