Battery Cell Pole Tap and Degassing Opening Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-voltage battery cells for motor vehicles face challenges in designing cost-effective cell housings while preventing electrical breakdowns due to the proximity of escaping gases to cell pole taps during thermal events, which complicates production and reduces energy content.
Innovation Solution
A battery cell design where the cell pole taps and releasable degassing opening are arranged on the same side of the cell housing, with the degassing opening positioned between the pole taps, allowing for simpler separation of degassing paths and reducing the risk of short circuits, enabling a cost-effective and safe design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the degassing opening is arranged between the cell pole taps on the same side, then the production of the battery cell is simplified and cost-effective, but the risk of electrical breakdown increases due to proximity of escaping gases to the cell poles
Solution Approach 1:
The patent applies asymmetry by positioning the second cell pole tap offset from the centerline between the first cell pole tap and the degassing opening. This asymmetric arrangement creates an oblique alignment rather than a direct line, reducing the risk of electrical breakdown while maintaining the benefit of having all components on the same side for simplified production.
Solution Approach 2:
The patent introduces a separation element as an intermediary component between the cell pole taps and the degassing opening. This separation element acts as a physical barrier that prevents direct contact between the conductive gas and the cell poles, thereby eliminating the electrical breakdown risk while allowing the degassing opening to remain on the same side as the poles.
2Reliability
If the poles and degassing opening are arranged on different sides of the battery cell, then the escaping gases are kept away from the cell poles, but the production of the cell housing becomes more complex and the energy content is reduced
Solution Approach 1:
The patent merges the advantages of both arrangements by combining the separation safety feature with the simplified single-side configuration. All components (first cell pole tap, second cell pole tap, and degassing opening) are located on the same first housing side, eliminating the need for complex multi-side housing designs while maintaining effective gas-pole separation through the offset positioning and separation element.
Solution Approach 2:
The patent resolves the spatial conflict by transitioning from a two-dimensional separation (different sides) to a three-dimensional arrangement. The offset positioning in the plan view combined with the separation element creates vertical and lateral separation, effectively keeping gases away from poles while maintaining a compact single-side configuration that simplifies housing design.
3Ease of manufacture
If the second cell pole tap is arranged centrally between the first cell pole tap and the degassing opening, then the production is simplified, but the escaping gases are not sufficiently separated from the cell poles
Solution Approach 1:
The patent applies asymmetry by positioning the second cell pole tap offset from the centerline, creating an oblique alignment that breaks the direct path between the degassing opening and the cell poles. This asymmetric positioning reduces gas conductivity to the poles while maintaining production simplicity.
Solution Approach 2:
The separation element serves as an intermediary barrier that blocks the conductive path between the escaping gases and the cell pole taps. This mediator prevents the harmful electrical conduction while allowing the simplified central positioning of components to be maintained.
Data Source
AI summary
A battery cell for a high-voltage battery for a motor vehicle. The battery cell includes a cell housing with a first housing side. In the first housing side, a releasable degassing opening is arranged, and the battery cell includes a first and a second cell pole tap which are arranged on the first housing side. The second cell pole tap is arranged in a defined first direction between the first cell pole tap and the releasable degassing opening.