Battery Module Sliding Side Plate for Cell Swelling Relief
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Solution Overview
Problem
All-solid-state batteries experience significant swelling, which applies a large thrust on the side plates of the module, leading to deformation, cracking, or breakage due to the inability of traditional structures to bear the swelling force effectively.
Innovation Solution
A battery module design featuring a case with a base plate, upper cover, and sidewall, including at least one movable side plate that can slide along the cell stacking direction, and elastic cable ties to manage the swelling force by converting it into sliding kinetic energy, reducing the need for rigid support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional rigid side plate structure is used, then structural strength is maintained, but swelling force causes deformation, cracking, or breakage
Solution Approach 1:
The side plate is designed to be movable rather than fixed, allowing it to slide along the stacking direction when cells swell. This dynamic capability transforms the rigid structure into an adaptive one that can accommodate volume changes without deforming or breaking, resolving the contradiction between maintaining strength and ensuring reliability under swelling conditions.
Solution Approach 2:
The side plate's position parameter is allowed to change through sliding motion along the stacking direction. By permitting this parameter change, the structure adapts to the swelling-induced volume increase while maintaining structural integrity, thus preventing deformation and breakage while preserving strength.
2Reliability
If all-solid-state battery is used, then safety is improved by eliminating liquid, but swelling amount and swelling force become very large
Solution Approach 1:
The harmful swelling force generated by all-solid-state batteries is converted into a beneficial sliding motion of the side plate. Instead of resisting the swelling force rigidly (which causes breakage), the structure allows the force to drive the movable side plate along the stacking direction, thereby utilizing the harmful force to achieve adaptive structural adjustment while maintaining safety.
3Force
If movable side plate is used, then swelling force is reduced, but structural complexity increases
Solution Approach 1:
The side wall structure is segmented into multiple side plates, with at least one being movable. This segmentation allows the system to handle swelling forces through distributed sliding motion rather than requiring a single complex mechanism, thereby reducing the overall structural complexity while effectively managing swelling forces.
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
The design effectively reduces the risk of side plate damage by converting swelling-induced thrust into sliding motion, maintaining structural integrity and enhancing safety of the battery module and connected electronic devices.
Implementation Method 1
The side plates include at least one movable plate capable of sliding along a stacking direction of the cells
Implementation Method 2
A battery module design featuring a case with a base plate, upper cover, and sidewall, including at least one movable side plate that can slide along the cell stacking direction, and elastic cable ties to manage the swelling force
Data Source
AI summary
A battery module and an electronic device are provided. The battery module includes a case and a cell. Multiple cells are stacked in the case along a thickness direction. The case includes a base plate, an upper cover, and a side wall. The side wall is formed by enclosing multiple side plates. The side plates include at least one movable plate capable of sliding along a stacking direction of the cells. When the cell swells, an swelling force and an swelling amount of the cell pushes the outermost cell to move toward the stacking direction, so that the movable plate is pushed and slides along with the swelling of the cell, which can reduce the swelling force on the movable plate to effectively reduce the swelling force on the movable plate in an swelling direction of the cell, so as to significantly improve the safety of the battery module.