Battery Pack Rigid Plate Structure for Vibration Resistance
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Solution Overview
Problem
Conventional large-area battery packs with a cell-to-pack structure are vulnerable to vibrations and impacts due to concentrated weight distribution, which can lead to structural instability and potential damage.
Innovation Solution
Incorporating an auxiliary rigid plate between battery modules to disperse weight and increase mounting points, forming a unitary rigid body with the housing to enhance structural stability and distribute impact and vibration forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large-area module is used in a cell-to-pack structure to increase energy density, then the battery capacity and output are improved, but the module weight increases making the battery vulnerable to vibrations and impacts
Solution Approach 1:
The patent divides the large-area module into smaller sub-modules arranged in an array pattern. This segmentation reduces the weight concentration at any single location, distributing the mass across multiple smaller units connected by rigid bars, thereby reducing vulnerability to vibrations and impacts while maintaining the overall battery capacity.
Solution Approach 2:
The patent introduces rigid bars as intermediary elements connecting the sub-modules. These rigid bars act as mediators that distribute mechanical stresses and vibrations across the entire module array, preventing localized damage from impacts while maintaining structural integrity and electrical connectivity.
2Quantity of substance
If multiple battery modules are arranged adjacently to increase energy storage, then the battery capacity is improved, but the structural stability deteriorates due to weight concentration
Solution Approach 1:
The patent segments the battery pack into multiple independently supported sub-modules arranged in an array. Each sub-module is supported by its own rigid bars, preventing weight concentration and maintaining structural stability while achieving high energy storage capacity through the collective arrangement of multiple modules.
Solution Approach 2:
The patent transitions from a conventional linear or stacked module arrangement to a two-dimensional array configuration. This dimensional change allows for better distribution of weight and improved structural stability, as the load is spread across multiple support points in both horizontal dimensions rather than concentrated in a single vertical stack.
3Device complexity
If end plates are used to case the battery modules, then the module structure is simplified, but the ability to withstand vibrations and impacts is reduced
Solution Approach 1:
The patent introduces rigid bars as intermediary structural elements that connect sub-modules and distribute mechanical loads. These rigid bars serve as mediators between the end plates and the battery cells, enhancing the structure's ability to withstand vibrations and impacts while maintaining the simplified end plate casing design.
Solution Approach 2:
The patent creates a composite structural system combining end plates, rigid bars, and sub-modules. This composite structure leverages the strengths of each component: end plates provide enclosure and basic structural support, while rigid bars add vibration and impact resistance, creating a synergistic structure that maintains simplicity while enhancing strength.
Data Source
AI summary
An embodiment battery pack includes battery modules each including a plurality of battery cells stacked and connected in parallel, the battery modules being arranged adjacent to each other, a housing fixedly surrounding the battery modules, and an auxiliary rigid plate disposed between the battery modules so as to face side surfaces of the battery modules, the auxiliary rigid plate being coupled to the housing and defining a unitary rigid body together with the housing.