Battery Module Housing Plate With Spring Support for Cell Swelling
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Solution Overview
Problem
Existing battery modules fail to effectively minimize displacement deviations caused by the swelling phenomenon of battery cells, leading to potential deformation of the module housing and deterioration of cycle-life.
Innovation Solution
A deformation preventing structure comprising a pressure plate, wave-shaped spring, and protruded steel balls is integrated into the housing plate to counteract swelling forces, maintaining the module's rigidity and minimizing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a battery module uses a large number of battery cells, then the output power and energy are improved, but the module size increases and integration with the battery pack becomes difficult
Solution Approach 1:
The battery module divides the large number of battery cells into multiple stacks, with each stack containing a subset of cells. This segmentation allows the module to maintain high power output while organizing cells in a compact, space-efficient arrangement that facilitates integration with the battery pack structure.
Solution Approach 2:
The patent arranges battery cells in a three-dimensional stacked configuration rather than a simple linear or planar arrangement. By utilizing vertical stacking and multi-layer positioning, the module achieves high cell density and output power within a reduced footprint, enabling better integration with the battery pack.
2Power
If a battery module uses a large number of battery cells, then the output power and energy are improved, but the number of connection tabs increases making assembly complex
Solution Approach 1:
The patent merges multiple connection tabs from different battery cells into shared connection structures. Within each stack, adjacent cells share common connection tabs, and multiple stacks are interconnected through a unified connection architecture. This merging reduces the total number of connection tabs from what would be required if each cell had independent connections, thereby simplifying assembly while maintaining high power output capability.
Solution Approach 2:
The connection tabs are designed to serve multiple functions: they connect adjacent cells within a stack, provide electrical connections between stacks, and serve as attachment points for the module structure. This multi-functionality reduces the number of separate components needed and simplifies the overall assembly process while supporting high power output.
3Ease of manufacture
If battery cells are arranged in a single layer, then the connection structure is simple, but the space utilization and integration efficiency are low
Solution Approach 1:
The patent transitions from a single-layer planar arrangement to a multi-layer three-dimensional stacked configuration. Cells are arranged in vertical stacks with multiple layers positioned at different heights, utilizing the vertical dimension to achieve high space utilization. This multi-dimensional arrangement maintains relatively simple connection structures within each layer while dramatically improving overall space efficiency and integration capability with the battery pack.
Data Source
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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.