EV Battery Module Adhesive Mounting for Stiffness and Cooling
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Solution Overview
Problem
Existing battery arrangements for motor vehicles face issues with mechanical connection inefficiencies, high weight and cost due to lateral screw connections and the use of heat-conducting paste, and large gaps that compromise mechanical stiffness and cooling efficiency.
Innovation Solution
A battery arrangement where cell modules are connected to the battery housing using an adhesive compound with low shearing resistance for easy removal and a further adhesive with high shearing resistance for structural integrity, eliminating the need for lateral screwing and reducing gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cell modules are screwed to the battery housing laterally, then mechanical connection is provided, but mechanical stiffness is reduced and device complexity increases
Solution Approach 1:
The patent replaces the mechanical screw connection system with an adhesive bonding system. The adhesive compound provides the necessary mechanical connection between cell modules and battery housing without requiring screws, screw holes, or lateral access clearances, thereby reducing device complexity while maintaining connection strength
Solution Approach 2:
The invention extracts and eliminates the screw fastening elements and associated lateral access requirements from the connection system. By using adhesive bonding, the complex mechanical fastening structure is removed, simplifying the overall device design while maintaining adequate mechanical connection
2Temperature
If heat-conduction paste is used between cell module housing and base plate, then thermal conduction is improved, but weight and cost increase
Solution Approach 1:
The adhesive compound performs multiple functions simultaneously: it provides mechanical bonding between the cell module housing and base plate, fills gaps and clearances, and conducts heat away from the battery cells. This eliminates the need for separate heat-conduction paste layers, reducing both weight and cost while maintaining effective thermal management
Solution Approach 2:
The invention merges the bonding function and thermal conduction function into a single adhesive compound layer. Instead of using separate materials for mechanical attachment and heat conduction, the adhesive compound integrates both functions, thereby reducing the total amount of material needed and simplifying the structure
3Manufacturing precision
If large gap is provided between base and base plate for tolerances, then manufacturing precision is improved, but adhesive quantity and cost increase
Solution Approach 1:
The patent changes the mechanical properties of the adhesive compound by selecting materials with high elongation at break (20-50%). This parameter change allows the adhesive to accommodate larger gaps and clearances caused by manufacturing tolerances without requiring excessive adhesive quantity, as the elongated adhesive can stretch and fill larger spaces effectively
4Strength
If cell modules are screwed to screw attachment bar, then mechanical connection is provided, but accessibility is reduced and operation difficulty increases
Solution Approach 1:
The adhesive bonding system replaces the screw fastening system, eliminating the need for lateral access clearances and screwdriver operations. The adhesive is applied in a controlled manufacturing process, and once cured, provides equal or superior connection strength without compromising ease of operation or maintenance access
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 configuration enhances mechanical performance, reduces weight and cost, improves cooling efficiency, and facilitates easy module removal for repair or recycling, while maintaining effective structural stability.
Implementation Method 1
A base of the cell module housing is connected to the base plate of the battery housing by means of an adhesive compound
Implementation Method 2
The cell module housing is further connected to a side wall of the battery housing by means of a further adhesive. The further adhesive here has a higher shearing resistance than the adhesive compound
Data Source
AI summary
A battery arrangement for a motor vehicle includes a battery housing and a cell module that is disposed on a base plate of the battery housing. The cell module has a cell module housing and a plurality of battery cells disposed in the cell module housing and a base of the cell module housing is connected to the base plate of the battery housing by an adhesive compound. The cell module housing is connected to a side wall of the battery housing by an adhesive and the adhesive has a higher shearing resistance than the adhesive compound disposed between a base of the cell module housing and the base plate of the battery housing.