Battery Module Housing With Spring Pressure Plate for Cell Swelling
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Solution Overview
Problem
The challenge is to minimize displacement deviation of battery cells due to swelling phenomena in battery modules and packs, which can lead to deformation and deterioration of cycle-life.
Innovation Solution
A battery module design featuring a deformation preventing structure with a housing plate, pressure plate, and wave-shaped spring structure, including a recess portion and steel balls, to counteract expansion forces and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid module housing structure is used to maintain shape stability, then structural integrity is improved, but displacement deviation of battery cells due to swelling increases
Solution Approach 1:
The patent introduces a deformation preventing structure with movable components (pressure plate and spring) that can dynamically adjust to battery cell swelling. The spring mechanism allows the structure to move and absorb expansion forces, transforming the rigid housing into a semi-dynamic system that maintains shape stability while accommodating cell displacement.
Solution Approach 2:
The deformation preventing structure acts as an intermediary between the rigid module housing and the swelling battery cells. This intermediate structure absorbs and distributes expansion forces, preventing direct transmission to the housing while minimizing cell displacement deviation through the pressure plate's constraining action.
2Strength
If battery cells are tightly fixed in the module housing, then structural integrity is improved, but deformation of battery cells during swelling increases
Solution Approach 1:
The deformation preventing structure incorporates flexible elements including a spring mechanism and a pressure plate that can deform elastically. These flexible components provide a compliant interface between the rigid housing and battery cells, allowing the structure to maintain integrity while accommodating cell shape changes during swelling.
Solution Approach 2:
The spring structure in the deformation preventing mechanism serves as a pre-positioned cushioning element that absorbs expansion forces before they can cause significant cell deformation. The spring is pre-compressed or pre-positioned to provide immediate resistance against 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
This design effectively minimizes deformation of battery cell stacks and module housings during swelling, thereby extending the cycle-life of battery cells and maintaining structural integrity.
Implementation Method 1
a spring structure accommodated in the space part of the housing plate and disposed between the pressure plate and the housing plate
Data Source
AI summary
A battery module includes a battery cell stack including a plurality of battery cells stacked and arranged in a first direction; a module housing in which the battery cell stack is housed; and a deformation preventing structure disposed between the outermost battery cell of a plurality of battery cells and the module housing, wherein the module housing includes a housing plate including a space part and disposed adjacent to the outermost battery cell, the deformation preventing structure includes: a pressure plate fixed to the housing plate and supported on the battery cell stack; and a spring structure accommodated in the space part of the housing plate and disposed between the pressure plate and the housing plate. The space part is constituted by a recess portion provided on one side of the housing plate facing the battery cell stack.