Battery Module Insertion with Auxiliary Layers
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Solution Overview
Problem
Existing battery modules for motor vehicles face challenges in reducing weight, structural space requirements, and production costs, while maintaining high process reliability and low reject rates.
Innovation Solution
A battery module design featuring a battery module housing with a battery cell package comprising parallel pouch cells, compression pads, and insertion auxiliary layers, where the cells and pads are stacked and inserted through an opening in the housing, with a friction-reducing coating and adhesive bonding, and produced using a method involving compression and insertion with cylindrical rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional battery modules use solid housings for pouch cells, then mechanical protection is improved, but weight and structural space increase
Solution Approach 1:
The patent removes the solid housing structure entirely, extracting only the essential protective function. Pouch cells are inserted directly into the module without individual housings, eliminating unnecessary structural weight while maintaining mechanical protection through the module's overall structure and compression pads.
Solution Approach 2:
The patent replaces rigid solid housings with flexible compression pads made of foam material. These thin, flexible elements provide necessary mechanical protection and pressure distribution without the weight and bulk of traditional solid housings, allowing direct insertion of pouch cells into the module.
2Ease of manufacture
If pouch cells are inserted without auxiliary layers, then manufacturing simplicity is improved, but process reliability and insertability decrease
Solution Approach 1:
The patent introduces insertion auxiliary layers as intermediary elements between the pouch cells and the module housing. These layers act as mediators that facilitate smooth insertion by reducing friction and guiding the cells into position, thereby improving process reliability without significantly complicating manufacturing.
Solution Approach 2:
The patent replaces direct mechanical contact and friction-based insertion with a system using auxiliary layers that provide a controlled interface. The friction-reducing coating on these layers substitutes for complex mechanical alignment systems, enabling reliable insertion while maintaining manufacturing simplicity.
3Ease of operation
If friction-reducing coating is applied to auxiliary layers, then insertability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent modifies the surface properties of the auxiliary layers by applying a friction-reducing coating, changing the coefficient of friction parameter. This simple parameter change significantly improves insertability and reduces rejection rates during assembly, while the coating application process is straightforward and does not substantially increase manufacturing complexity.
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 reduces weight, costs, and structural space, while ensuring high process reliability and low reject rates by optimizing the arrangement and assembly of battery cells and compression pads within the module housing.
Implementation Method 1
The battery module also has a friction-reducing coating arranged either on the outside of the insertion auxiliary layers or on the inside of inner walls of the battery module housing
Implementation Method 2
at least one compression pad is arranged parallel to the battery cells. The at least two battery cells and the at least one compression pad are stacked one on top of the other
Implementation Method 3
The at least two battery cells, the at least one compression pad and the insertion auxiliary layers of one embodiment are bonded adhesively to one another
Data Source
AI summary
A battery module for a motor vehicle has a battery module housing (30) with an insertion opening (32) and at least one battery cell package (40) is arranged in the battery module housing (30). The battery cell package (40) has at least two battery cells (42) arranged parallel to one another and at least one compression pad (44) arranged parallel to the battery cells (42). The battery cells (42) and the at least one compression pad (44) are stacked one on top of the other in any desired order in a thickness direction (D). The battery cell package (40) is inserted in an insertion direction (E) through the insertion opening (32) into the battery module housing (30). The battery cell package (40) also has two insertion auxiliary layers (46) that respectively form outer sides (41) of the battery cell package (40) that are opposite in the thickness direction (D).