Battery Current Collector Groove Structure for Strength Retention
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Solution Overview
Problem
The existing current collecting members in power batteries have a through groove that weakens the structural strength, affecting their service life and reliability due to material reduction for cost savings.
Innovation Solution
A current collecting member with a through groove that includes protrusions along its outer circumference, a protection member, and an accommodating groove, which enhances structural strength, fatigue resistance, and welding reliability, while maintaining reduced material usage and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a through groove is opened on the main body of the current collecting member to reduce production costs, then material usage and cost are reduced, but the structural strength of the main body is weakened
Solution Approach 1:
The patent applies local quality by adding protrusions at specific locations (outer circumference of the through groove) to reinforce only the critical areas where stress concentrates, rather than uniformly thickening the entire structure. This allows cost reduction through material removal (through groove) while maintaining strength through localized reinforcement (protrusions).
Solution Approach 2:
The patent creates a composite structural design combining the through groove (material removal for cost reduction) with protrusions (structural reinforcement). This composite approach integrates two opposing modifications - material reduction and material addition - to simultaneously achieve cost savings and strength maintenance.
2Ease of manufacture
If a through groove is opened on the main body of the current collecting member, then production costs are reduced, but the service life of the current collecting member is affected
Solution Approach 1:
The protrusions are strategically positioned at the outer circumference of the through groove where stress concentration occurs during welding and operation. This localized reinforcement prevents crack initiation and propagation at critical points, extending service life without adding material throughout the entire structure, thus maintaining cost efficiency.
Solution Approach 2:
The protrusions act as preemptive reinforcement structures that cushion against potential failure modes before they occur. By strengthening the vulnerable areas around the through groove in advance, the design prevents premature failure and extends the operational lifespan of the current collecting member.
3Strength
If protrusions are added along the outer circumference of the through groove to enhance structural strength, then structural strength and fatigue resistance are improved, but device complexity increases
Solution Approach 1:
The reinforcement is segmented into discrete protrusions positioned at specific intervals around the through groove, rather than creating a continuous complex structure. This segmentation achieves the necessary strength enhancement while keeping the design relatively simple and manufacturable.
Solution Approach 2:
Instead of uniformly reinforcing the entire current collecting member or creating an overly complex structure, the patent applies partial action by adding protrusions only where needed (at the outer circumference of the through groove). This provides sufficient reinforcement without excessive complexity.
Data Source
AI summary
The disclosure belongs to the technical field of secondary batteries, and discloses a current collecting member, a battery and a battery manufacturing method. The current collecting member includes a connecting structure, the connecting structure includes a through groove, the through groove extends along the length direction of the connecting structure, and the edge of the through groove is provided with a protrusion. The structural strength of the main body of the current collecting member of the present disclosure is high.