Vehicle Battery Module Adhesive Mounting for Rigidity and Disassembly
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Solution Overview
Problem
Existing battery arrangements for motor vehicles face challenges with mechanical rigidity, weight, and cost due to lateral screw connections of cell modules, which result in inefficient use of mechanical properties and require excessive thermal paste, leading to increased weight and cost.
Innovation Solution
A battery arrangement using adhesives with different shear strengths, where a high-shear-strength adhesive connects the cell module housing to the battery housing's side wall for improved mechanical stability and a low-shear-strength adhesive for easy disassembly, eliminating the need for lateral screwing and reducing adhesive usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cell modules are screwed to the battery housing laterally, then mechanical connection is achieved, but mechanical rigidity is insufficient and device complexity increases
Solution Approach 1:
The patent replaces the mechanical screw connection system with a chemical adhesive bonding system. The adhesive applies shear strength to connect the cell module base to the battery housing base plate, eliminating the need for lateral screw connections and associated clearance spaces, thereby improving mechanical rigidity while reducing structural complexity
Solution Approach 2:
The patent changes the connection parameter from mechanical (screw threads requiring clearance) to chemical (adhesive bonding requiring minimal gap). By using adhesive with specific shear strength properties, the connection achieves superior rigidity without the geometric constraints of screw mounting
2Reliability
If lateral screw connections are used, then cell modules can be attached, but excessive thermal paste is required increasing weight and cost
Solution Approach 1:
The patent merges the mechanical connection function and thermal conduction function into a single adhesive layer. The adhesive simultaneously provides shear strength for mechanical bonding and thermal conductivity for heat transfer, eliminating the need for separate thermal paste layers and reducing overall material weight
Solution Approach 2:
The adhesive serves multiple functions simultaneously: it provides mechanical bonding through shear strength, thermal conduction through its thermal conductivity properties, and gap filling due to its viscoelastic characteristics. This multi-functionality eliminates the need for separate components and reduces total weight
3Strength
If high-shear-strength adhesive is used for connection, then mechanical rigidity improves, but disassembly becomes difficult
Solution Approach 1:
The patent creates a dynamic connection system where the adhesive provides high static shear strength for operational rigidity but allows controlled dynamic separation through heating or chemical treatment. The adhesive's viscoelastic properties enable it to be rigid under normal conditions but become pliable under specific conditions for disassembly
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 solution enhances mechanical connection and rigidity, reduces weight and cost, and allows for effective cooling and easy module removal, improving the battery's overall performance and CO2 balance.
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
Implementation Method 2
the cell module housing is connected to a side wall of the battery housing by means of a further adhesive, wherein the further adhesive has a higher shear strength than the adhesive arranged between the base of the cell module housing and the base plate of the battery housing
Data Source
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AI summary
The invention relates to a battery arrangement for a motor vehicle, comprising a battery housing (14) and at least one cell module (12), which is arranged on a base plate (16) of the battery housing (14). The at least one cell module (12) comprises a cell module housing (22) and a plurality of battery cells (24) arranged in the cell module housing (22). A base (26) of the cell module housing (22) is connected to the base plate (16) of the battery housing (14) by means of an adhesive compound (28). The cell module housing (22) is connected to a side wall (18) of the battery housing (14) by means of a further adhesive (30). The further adhesive (30) has a higher shear strength than the adhesive compound (28) arranged between the base (26) of the cell module housing (22) and the base plate (16) of the battery housing (14).