Battery Module Housing Screw Placement for Electromagnetic Sealing
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Solution Overview
Problem
Existing battery module designs face challenges in forming a reliable, electromagnetically compatible connection between the housing and cover elements while maintaining a fluid-tight seal, as screw connections often interfere with sealing materials and compromise the integrity of both electrical and electromagnetic sealing.
Innovation Solution
The battery module employs screw connections arranged outside the sealing element, forming an electromagnetically compatible connection between the housing and cover elements, with screw receptacles designed as screw domes to minimize corrosion and stress peaks, and a structural adhesive sealing element to ensure a secure, adjustable seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If screw connections contact sealing material, then assembly is simplified, but screw parameters become undefined due to influence on screw connection formation
Solution Approach 1:
The screw connections are extracted from the sealing material region, eliminating direct contact between threaded fasteners and sealing material. This prevents the sealing material from interfering with screw thread engagement and ensures consistent, defined screw parameters for reliable mechanical and electrical connection.
2Reliability
If zero gap is formed between housing and cover, then electromagnetic shielding is improved, but sealing material is required in gap region which complicates assembly
Solution Approach 1:
The electrically conductive sealing element serves dual purposes: maintaining the zero gap required for electromagnetic shielding and providing the sealing function traditionally requiring separate filling materials. This eliminates the need for additional sealing material application steps while achieving both electromagnetic compatibility and fluid sealing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves a reliable electrical and electromagnetic seal, preventing condensate penetration and maintaining electromagnetic compatibility, while allowing for adjustable spacing to optimize sealing and electromagnetic shielding.
Implementation Method 1
the housing element and the cover element are connected to one another by means of a plurality of screw connections, in such a way that an electrical contact is formed between the housing element and the cover element
Implementation Method 2
a sealing element is arranged between the housing element and the cover element in such a way that the interior is sealed off in a fluid-tight manner from an environment
Data Source
AI summary
The invention relates to a battery module comprising a housing element (2) made of a metal material (3) and a cover element (4) made of a metal material (5), which elements are connected to one another by means of a plurality of screw connections (8), so as to form a common interior (6) designed to receive a plurality of battery cells (7), in such a way that an electrical contact is formed between the housing element (2) and the cover element (4), wherein a sealing element (9) is also arranged between the housing element (2) and the cover element (4) in such a way that the interior (6) is sealed off in a fluid-tight manner from an environment (10), wherein the plurality of screw connections (8) is arranged outside of the sealing element (9).