Battery Cell Housing with Compensating Elements for Uniform Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery cells with galvanic cells experience inhomogeneous pressure distribution due to spot contact with cell housings, leading to potential damage and reduced service life, especially when multiple cells are stacked, and require heavier cell housings to withstand pressure spikes.
Innovation Solution
A battery cell design featuring a dual cell housing structure with complementary compensating elements forming flat inner surfaces to ensure homogeneous force distribution, allowing for large-area contact and reducing pressure spikes, along with a method for producing such cells using compensating materials to create planar inner faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cell housing is designed with protrusions and depressions for electrical connection, then electrical contact with further battery cells is enabled, but pressure distribution becomes inhomogeneous leading to potential galvanic cell damage
Solution Approach 1:
The inner face of the cell housing is designed with localized compensating elements (protrusions or depressions) that create specific contact zones. These compensating elements are strategically positioned to ensure that the galvanic cell makes contact at multiple defined points, distributing pressure evenly across the cell surface while maintaining the necessary electrical connection protrusions and depressions.
2Reliability
If the cell housing is designed to withstand pressure spikes, then galvanic cell protection is improved, but the weight of the cell housing increases
Solution Approach 1:
The design changes the geometric parameters of the cell housing inner face by introducing compensating protrusions or depressions. This modifies the pressure distribution pattern from concentrated spot loads to distributed line or area loads, allowing the housing to withstand pressure spikes with reduced material thickness and lower weight while still protecting the galvanic cell.
3Quantity of substance
If multiple galvanic cells are arranged one above another, then battery cell capacity is increased, but pressure distribution becomes more inhomogeneous due to weight force and compressive force
Solution Approach 1:
The cell housing is segmented into multiple sections, each with its own compensating elements designed to handle the specific load characteristics of the galvanic cells in that section. This allows each segment to independently optimize pressure distribution for the cells it supports, ensuring uniform pressure distribution even when multiple cells are stacked vertically with significant weight and compressive forces.
4Stress or pressure
If the inner face of the cell housing is made flat for large-area contact, then pressure distribution becomes homogeneous, but electrical connection capability with further battery cells is reduced
Solution Approach 1:
The inner face of the cell housing features asymmetric geometry with compensating elements (protrusions or depressions) positioned at specific locations. This asymmetric design creates a flat contact surface for homogeneous pressure distribution over the majority of the galvanic cell surface, while localized asymmetric features provide the necessary protrusions and depressions for electrical connection with adjacent battery cells.
Data Source
AI summary
A battery cell comprises at least one galvanic cell, a first cell housing element, and a second cell housing element. The two cell housing elements jointly substantially completely enclose the galvanic cell. The first cell housing element has inner recesses on the inner surface thereof, which inner recesses are, on an outer surface of the first cell housing element lying immediately opposite the inner surface, outer protrusions for electrically contacting a first further battery cell. First compensation elements are complementary to the inner recesses in such away and are arranged in the inner recesses in such a way that the first compensation elements, together with the inner recesses, form a substantially flat inner surface of the first cell housing element.