Variable-Thickness Current Collector for Battery Welding Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in battery production is to ensure effective welding machinability of the current collecting component with the electrode assembly while maintaining a suitable thickness within the limited internal space of the battery, which affects welding efficiency and cost due to the required higher welding power.
Innovation Solution
A current collecting component design with a thicker current collecting region and a thinner electrical connection region, allowing for efficient welding and reduced energy consumption, while the thicker region can carry large currents, enhancing overcurrent capacity and machinability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current collecting component has a larger thickness to carry large currents, then the overcurrent capacity is improved, but the welding power requirement increases and welding efficiency decreases
Solution Approach 1:
The current collecting component employs different thickness values in different regions: the first region (welding area) has a first thickness optimized for welding machinability, while the second region (current carrying area) has a second thickness greater than the first to carry large currents. This local differentiation allows the component to achieve both good welding efficiency and sufficient overcurrent capacity simultaneously.
2Reliability
If the current collecting component has a larger thickness to ensure reliability, then the overcurrent capacity is improved, but the internal space of the battery is insufficiently utilized
Solution Approach 1:
By implementing local quality differentiation with varying thickness across different regions of the current collecting component, the design achieves sufficient overcurrent capacity in the second region while minimizing the thickness in the first region for space optimization, thereby improving overall internal space utilization in the battery.
Solution Approach 2:
The patent transitions from a uniform thickness design to a variable thickness design along the length dimension of the current collecting component. This dimensional variation allows the component to optimize both current carrying capability and space utilization by adapting the thickness profile to the specific functional requirements of different regions.
3Ease of manufacture
If the current collecting component has a uniform thickness, then the manufacturing is simplified, but the welding machinability and overcurrent capacity cannot be optimized simultaneously
Solution Approach 1:
The current collecting component is designed with local quality differentiation where the first region has a first thickness optimized for welding machinability and the second region has a second thickness optimized for current carrying capacity. This regional differentiation allows each area to be optimized for its specific function while remaining manufacturable through standard processes.
Data Source
AI summary
The present disclosure relates to a current collecting component, a battery, and a battery module. The current collecting component includes a current collecting part and a connection part. The current collecting part includes a current collecting region and at least one electrical connection region. The connection part is connected with the current collecting region, wherein a thickness of the current collecting region is greater than a thickness of the electrical connection region.