Battery Cell End Plate Grooves for Stable Burst Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing end plates for battery cell housings require complex manufacturing to achieve a small tolerance in the triggering pressure for the predetermined breaking-point, which complicates production and may not ensure adequate mechanical stability.
Innovation Solution
The end plate features two mechanically coupled grooves with different circular radii, allowing for a common predetermined breaking-point that can be manufactured with greater ease and tolerance, enabling a lower minimal pressure for breaking while maintaining mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single groove is used as the predetermined breaking-point, then the manufacturing precision requirement is high (small tolerance needed), but the device complexity increases and manufacturing becomes elaborate
Solution Approach 1:
The single groove structure is segmented into two mechanically coupled grooves with different circular radii. The first groove has a smaller radius and the second groove has a larger radius, creating two distinct stress concentration zones that work together to form the breaking-point. This segmentation allows each groove to have relaxed individual tolerance requirements while maintaining the overall precision of the triggering pressure through their mechanical coupling.
2Manufacturing precision
If a single groove is used as the predetermined breaking-point, then the triggering pressure tolerance can be controlled, but the mechanical stability of the end plate decreases
Solution Approach 1:
Two grooves with different radii are mechanically coupled to form a combined breaking-point structure. The first groove (smaller radius) and second groove (larger radius) are positioned such that their stress fields interact, creating a unified failure mechanism. This merging allows the end plate to maintain higher overall mechanical stability while still achieving the required triggering pressure tolerance through the coordinated action of both grooves.
Data Source
AI summary
An end plate for a cell housing of a battery cell includes: a first side and a second side, the second side arranged opposite the first side; a first groove that forms a first circular shape; and a second groove that forms a second circular shape is provided. A first aperture of the first groove or a second aperture of the second groove is on the first side or on the second side; the first groove and the second groove are mechanically coupled together; the first circular shape has a first radius r1; the second circular shape has a second radius r2; the first circular shape and the second circular shape have a common center; and the first radius r1 is at least 0.8 times as large as the second radius r2. A cell housing for a battery cell is further provided, including: a hollow cylinder; and an end plate, the end plate on an end face of the hollow cylinder. A battery cell is further provided, including a cell housing and an energy-storage device.