Battery Cell Housing With Spacer Elements Against Swelling
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Solution Overview
Problem
Galvanic cells in battery modules experience swelling and delamination due to aging, ion intercalation, and electrolyte decomposition, leading to reduced service life and manufacturing complexity.
Innovation Solution
A galvanic cell design featuring a cell housing with spacer elements and compensation elements that maintain cell winding alignment and prevent delamination, using a 'hard case' housing and specific layer arrangements to manage expansion and stress, while allowing for easy assembly and clamping of cells in a battery module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If galvanic cells are used in battery modules, then energy storage capacity is improved, but swelling and delamination occur due to aging and ion intercalation
Solution Approach 1:
The patent applies beforehand cushioning by providing a receiving space in the cell housing that is larger than the cell winding in the stacked direction. This receiving space acts as a buffer that accommodates the swelling of the cell winding during aging and ion intercalation/de-intercalation cycles, preventing delamination and extending service life while maintaining energy storage capacity.
2Productivity
If cell windings are tightly packed to increase energy density, then productivity is improved, but manufacturing precision becomes more difficult to maintain
Solution Approach 1:
The patent applies segmentation by dividing the cell housing into a housing body and a separate receiving space. This segmentation allows the cell winding to be loosely arranged within the receiving space during manufacturing, maintaining manufacturing precision, while still achieving high energy density through optimized cell module design and arrangement.
3Reliability
If spacer elements are added to prevent delamination, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the spacer function directly into the cell housing structure itself. The receiving space is formed as an integral part of the housing body, combining the housing and spacing functions into a single component. This reduces device complexity compared to adding separate spacer elements while maintaining reliability by preventing delamination through the buffered receiving space.
Data Source
AI summary
Galvanic cells and/or battery modules comprising several galvanic cells, which have an increased service life and which are in particular easy and inexpensive to manufacture.