Dual-Pack Battery Cell Pins With Split Welding Plates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In battery cells with two cell packs, the existing welding configuration requires different tab lengths for each pack, leading to increased difficulty in welding and reduced production efficiency due to the need to distinguish between the two packs during assembly.
Innovation Solution
The battery cell design includes pins with a second connection portion featuring two welding plates that can be arranged in a first state to accommodate tabs from both cell packs, allowing for independent welding and eliminating the need to differentiate between the packs during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only one welding position is defined on the pins for two cell packs, then the structure is simple, but the total thickness of the tabs is large making welding parameters difficult to control and welding difficulty increases
Solution Approach 1:
The pin's connection portion is segmented into multiple welding plates (first welding plate and second welding plate) arranged at intervals. Each welding plate provides a separate welding position, allowing the tabs of two cell packs to be welded independently. This segmentation resolves the contradiction by maintaining structural simplicity while enabling controlled welding parameters for each tab separately.
Solution Approach 2:
The welding plates are arranged in a spatial configuration along the first direction with a controlled distance between them. This dimensional arrangement allows multiple welding positions to coexist on a single pin without increasing overall structural complexity, while enabling independent control of welding parameters for each position.
2Ease of operation
If different tab lengths are used for the two cell packs to ensure tabs reach the welding position, then the tabs can be connected, but the two cell packs must be produced differently and distinguished during assembly
Solution Approach 1:
The pin structure with multiple welding plates serves multiple functions: it can weld tabs of equal length from two different cell packs simultaneously. The universal design allows identical cell packs to be used without requiring differentiation during assembly, resolving the contradiction by enabling both proper connection and production efficiency.
Solution Approach 2:
The design enables both cell packs to have identical tab lengths and structures. The homogeneous configuration of tabs from both packs can be welded to the corresponding welding plates on the pin without requiring different pack designs or assembly differentiation, thereby improving production efficiency.
3Device complexity
If the tabs of two cell packs are welded at a single welding position, then the structure is simple, but the parameters for welding are not easy to control
Solution Approach 1:
The welding connection is segmented into multiple independent welding positions on the pin. Each welding plate can be optimized for specific welding parameters, allowing precise control of welding conditions for each tab while maintaining overall structural simplicity through the modular pin design.
Data Source
AI summary
The application discloses a battery cell. The battery cell includes a top cover assembly, two cell packs and pins; the two cell packs are arranged side by side along a first direction, and tabs are respectively provided at two ends of each of the cell packs along a second direction; the pins are each include a first connection portion and a second connection portion; the first connection portion is connected to the top cover assembly, and the second connection portion includes two welding plates that are arranged at an interval and are perpendicular to the first direction, and two of the tabs of the two cell packs located on a same side are respectively connected to sides of the two welding plates facing away from each other, and a distance between surfaces of the two welding plates facing away from each other along the first direction is d.