Cell Array Assembly Layout for High-Density Battery Pack Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Secondary battery packs without module structures have reduced structural strength and lower energy density, necessitating improvements in both structural strength and energy density.
Innovation Solution
A cell array assembly is designed with unit cells connected in series, featuring electrode terminals on opposite sides and a cooling plate perpendicular to the cell array, eliminating the need for additional connecting members like busbars, and incorporating a frame for structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If module structure is excluded to improve energy density, then energy density increases, but structural strength decreases
Solution Approach 1:
The battery pack is divided into multiple cell arrays, each comprising multiple unit cells arranged in series. This segmentation allows direct placement of cell arrays into the battery pack case without requiring intermediate module structures, thereby improving energy density while maintaining structural integrity through the frame design
Solution Approach 2:
Multiple cell arrays are merged together within a single battery pack case, with adjacent cell arrays electrically connected through shared electrode terminals. This merging eliminates the need for separate module housings and connecting components, increasing energy density while the integrated frame provides structural strength
2Reliability
If additional connecting members like busbars are used to connect cell arrays, then electrical connection is achieved, but weight increases
Solution Approach 1:
Adjacent cell arrays are electrically connected by directly contacting electrode terminals between neighboring cell arrays, eliminating the need for separate busbars or connecting members. This merging of electrical connection functions into the cell array structure itself reduces weight while maintaining reliable electrical connection
Solution Approach 2:
The function of separate connecting members (busbars) is extracted and integrated directly into the cell array structure through shared electrode terminals. This eliminates unnecessary components and their associated weight while achieving the same electrical connection purpose
Data Source
AI summary
A secondary battery pack includes: a plurality of cell arrays, each including a plurality of unit cells located in series along a first direction; and a frame to include the cell arrays. Each of the unit cells includes: a first surface having a long side extending in the first direction; a second surface opposite to the first surface and having a long side extending in the first direction; a third surface perpendicular to the first surface and in contact with the long side of the first surface and the long side of the second surface; a fourth surface opposite to the third surface; a first side surface in contact with short sides of the first to fourth surfaces; a second side surface opposite to the first side surface; a first electrode terminal on the first side surface; and a second electrode terminal on the second side surface.