Battery Cell Assembly With Shared Insulation Wrap for Higher Energy Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing battery technologies, multiple insulation films between battery cells occupy internal space and reduce energy density in battery packs.
Innovation Solution
A battery cell assembly where at least two battery cells are stacked with an insulation film wrapping their periphery, eliminating the need for multiple insulation films between adjacent cells, and an insulation piece is optionally used between cells to prevent electrical connection and absorb expansion forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple insulation films are placed between adjacent battery cells, then insulation performance is improved, but energy density is reduced due to occupied internal space
Solution Approach 1:
The patent merges the insulation functions into a single shared insulation film that wraps around multiple adjacent battery cells together, rather than placing separate insulation films between each pair of cells. This consolidation maintains the necessary insulation performance while eliminating the redundant space occupation of multiple films, thereby preserving energy density.
Solution Approach 2:
The shared insulation film serves multiple functions simultaneously: it provides insulation between multiple adjacent battery cells, structurally binds the cells together into an assembly, and reduces material consumption. This multi-functional approach resolves the contradiction by achieving insulation performance while minimizing space occupation.
2Reliability
If multiple insulation films are used between battery cells, then insulation is ensured, but insulation film consumption increases
Solution Approach 1:
The patent combines multiple insulation films into a single shared insulation film that serves multiple cells simultaneously. This merging reduces the total quantity of insulation film material required while maintaining adequate insulation between all adjacent cells, directly addressing the issue of excessive material consumption.
3Quantity of substance
If battery cells are stacked without additional insulation, then space is optimized, but electrical connection risk increases
Solution Approach 1:
The shared insulation film acts as an intermediary element between adjacent battery cells, providing electrical isolation while allowing the cells to be closely stacked. This intermediary structure prevents direct electrical contact between cells, eliminating the harmful effect of unintended electrical connection while maintaining the space optimization benefits of close stacking.
Data Source
AI summary
The present disclosure relates to the technical field of energy storage devices, and provides a battery cell assembly, a battery module, and a battery pack. The battery cell assembly includes: at least two battery cells and an insulation film. The at least two battery cells are stacked. Each battery cell includes an electrode assembly and a battery housing. The electrode assembly is accommodated in the battery housing. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate. The insulation film surrounds a periphery of the at least two battery cells to wrap the at least two battery cells together.