Multi-Tab Secondary Battery Layout for Reduced Top Space
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing secondary battery designs with multi-tab wound structures waste top space due to secondary bending of electrode tabs, reducing energy density.
Innovation Solution
A secondary battery design featuring a first adapter piece and an electrode assembly with a first multi-tab structure, where all first electrode tabs are stacked and connected to the first adapter piece, with at most one layer of adapter members in the L direction, reducing top space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If secondary bending of electrode tabs is used in multi-tab wound structure, then the battery structure can be formed, but top space is occupied and energy density is reduced
Solution Approach 1:
The electrode tabs are divided into multiple segments stacked together to form a multi-tab structure. By segmenting the tabs and stacking them, the design eliminates the need for secondary bending while maintaining the multi-tab configuration, thereby reducing top space occupation and improving energy density.
Solution Approach 2:
The electrode tabs are arranged in a stacked configuration along the thickness direction rather than being bent in the planar direction. This dimensional change from bending to stacking allows the tabs to be organized without occupying excessive top space, effectively resolving the space occupation issue.
2Ease of manufacture
If secondary bending of electrode tabs is used, then the battery structure can be formed, but the bending effect becomes less stable
Solution Approach 1:
By dividing the electrode tabs into multiple stacked segments, the structure eliminates the need for secondary bending operations. This segmentation approach creates a more stable configuration where tabs are held in place through stacking rather than repeated bending, improving the stability of the bending effect.
3Ease of manufacture
If multi-tab wound structure with secondary bending is used, then battery structure can be achieved, but energy density is reduced
Solution Approach 1:
The electrode tabs are arranged in a stacked configuration along the thickness direction rather than being bent in the planar direction. This dimensional change reduces the space occupied by adapter members in the L direction, allowing more active materials to be packed into the battery, thereby improving energy density.
Solution Approach 2:
The multi-tab structure is formed by stacking segmented tabs, which eliminates the need for space-consuming secondary bending. This segmentation approach maintains the multi-tab configuration necessary for battery performance while optimizing space utilization to improve energy density.
Data Source
AI summary
A secondary battery is provided, comprising a first adapter piece and an electrode assembly, comprising a first and second electrode plates, a plurality of first electrode tabs, a second electrode tab, a direction parallel to the first electrode plate being L, two end points in a thickness direction being T1 and T3, a position of one of the first electrode tabs farthest from T1 or T3 is T2; all the first electrode tabs are stacked to form a first multi-tab structure and connected to the first adapter piece, it further comprises a first adapter member comprising the first multi-tab structure and the first adapter piece; in the L direction, there is at most one layer of the first adapter member. The present application may reduce the existing waste of the top space caused by bending electrode tabs, and is more stable for the bending effect, improving the ED of battery.