Battery Module Sliding Plates for Cell Swelling and Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery modules face challenges in maintaining initial pressing force and effectively absorbing large amounts of cell swelling during charging and discharging, particularly with pure silicon or all-solid-state battery cells, which require enhanced structural rigidity and pressure control.
Innovation Solution
The battery module incorporates a sliding plate system with connection members, including springs, between adjacent battery cells, and shaft members connected to the sliding plates to absorb swelling and maintain initial pressure, along with a mounting part on the module frame to minimize deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compression pad is used between battery cells, then some swelling can be absorbed, but the initial pressing force cannot be maintained and large amounts of swelling during charging/discharging cannot be controlled
Solution Approach 1:
The patent employs a dynamic compression structure where the upper plate is configured to move vertically in response to cell swelling. This dynamic mechanism maintains continuous pressing force on the battery cells while accommodating volume changes during charging/discharging cycles, resolving the contradiction between maintaining initial pressing force and absorbing large amounts of swelling.
Solution Approach 2:
The patent changes the structural parameters of the compression mechanism by transitioning from a static compression pad to a dynamic upper plate system with adjustable pressing force. This allows the system to adapt pressing force parameters according to the swelling state of battery cells, particularly for pure silicon or all-solid-state cells that experience large volume changes.
2Weight of moving object
If the battery module is made compact with small size and weight, then integration is improved, but structural rigidity and stability are reduced when cells swell
Solution Approach 1:
The patent employs a flexible upper plate that can deform and move to accommodate cell swelling while maintaining structural integrity. This flexible component allows the module to remain compact and lightweight while still providing sufficient structural support and rigidity during battery operation and swelling events.
Solution Approach 2:
The dynamic upper plate mechanism allows the module structure to adapt to swelling forces without requiring heavy reinforcement. The plate moves vertically to absorb swelling while maintaining horizontal stability, preserving module rigidity without increasing weight.
3Reliability
If additional structures are added to control swelling and maintain pressing force, then swelling control is improved, but device complexity increases
Solution Approach 1:
The upper plate serves multiple functions: it provides structural support for the module, applies compression force to the battery cells, and moves dynamically to accommodate swelling. This multi-functional design achieves swelling control and pressing force maintenance without adding separate dedicated components, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent merges the compression mechanism with the module's structural framework by integrating the upper plate into the overall module design. This combines the functions of structural support and compression application into a single integrated component, reducing overall device complexity while achieving the desired swelling control.
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 allows for controlled pressure management and absorption of cell swelling, enhancing the stability and rigidity of the battery module by enabling the sliding plates and connection members to absorb pressure changes and minimize swelling, thus maintaining the initial pressing force.
Implementation Method 1
connection members, including springs, between adjacent battery cells, and shaft members connected to the sliding plates to absorb swelling and maintain initial pressure
Data Source
AI summary
A battery module includes a battery cell stack in which a plurality of battery cells are stacked; a module frame that houses the battery cell stack; and a sliding plate that is arranged between battery cells adjacent to each other among the plurality of battery cells.