Battery Cell Housing Insulation Using Roll-Fed PET Sections
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Solution Overview
Problem
Existing methods for insulating battery cell housings are costly and difficult to implement due to the need for individually adapted sections with narrow recesses, which are challenging to handle and produce, especially around electrical contact elements.
Innovation Solution
The method involves using a rolled-up strip of insulation material, such as polyethylene terephthalate (PET), which is unrolled and cut into sections with recesses to fit around contact elements, allowing for easier application and reduced material costs by eliminating the need for pre-fabricated sections on a carrier material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individually adapted sections with narrow recesses are used to insulate areas around contact elements, then electrical insulation effectiveness is improved, but material costs and handling difficulty increase significantly
Solution Approach 1:
The insulating material is provided as a long strip that can be segmented into multiple sections along its length. Each section can be individually adapted to surround contact elements while the strip itself remains a simple, easy-to-handle continuous form during storage and application
Solution Approach 2:
A adhesive layer is applied to the insulating material, acting as an intermediary that enables easy attachment of the insulating sections to the battery housing without requiring complex handling or specialized application equipment
2Manufacturing precision
If individually adapted sections are produced on a carrier material, then insulation precision is improved, but material costs increase
Solution Approach 1:
The insulating sections are separated from any carrier material and applied directly to the battery housing. This extraction of the carrier material eliminates the associated material costs while maintaining the precision needed for insulating areas around contact elements
Solution Approach 2:
The insulating material is provided as a long strip with continuous adhesive properties, changing the parameter of material continuity from discrete pre-mounted sections to a flexible, continuously applicable form that reduces material waste and cost
3Device complexity
If the insulating layer is extended closer to the contact element, then additional insulation measures are reduced, but the insulating layer application becomes more difficult
Solution Approach 1:
The insulation system is segmented into two parts: a main insulating layer applied to the battery housing and additional insulating sections applied around contact elements. This segmentation allows the main layer to be applied without excessive complexity while the contact element sections provide the necessary additional insulation where required
Data Source
Figure 1A~2D
Figure 3A~3D
Figure 3A~3D
AI summary
The invention relates to a method for insulating a battery cell (10), wherein the battery cell (10) has a battery housing with an electrical contact element (12) for electrically contacting one pole of the battery cell (10), wherein a portion of the battery housing of the battery cell (10) is provided with an insulating layer (14), and wherein a section (18) of an insulating material is glued onto a region (16) of the battery housing located between the electrical contact element (12) and the insulating layer (14), thereby electrically insulating this region (16) of the battery housing. The method provides that the insulating material is supplied as a rolled strip (20), and the section (18) is unwound and separated from the rolled strip (20) before being glued onto the battery housing.