Stepped Battery Pack Casing for Uniform Cell Adhesive Immersion
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Solution Overview
Problem
Existing battery packs face issues with adhesive fluidity, leading to incomplete immersion of cells and potential assembly problems due to uneven adhesive distribution.
Innovation Solution
The battery pack design incorporates a casing with a stepped inner bottom surface that divides the space into areas of varying heights, enhancing adhesive flow and ensuring complete cell immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is injected through the top of the casing to immerse cells, then cells are packaged by adhesive, but adhesive exhibits poor fluidity and may not completely immerse all cells
Solution Approach 1:
The patent introduces a height dimension by creating a stepped inner bottom surface with multiple levels. This dimensional change allows adhesive to flow from higher to lower levels under gravity, improving fluidity and ensuring complete cell immersion without requiring excessive adhesive injection pressure or volume.
Solution Approach 2:
The inner bottom surface is designed with different heights in different regions, creating local quality variations. The stepped structure provides different adhesive depths for different cell groups, allowing adhesive to naturally flow and distribute uniformly across all cells while maintaining appropriate immersion depth in each local area.
2Ease of operation
If conventional flat casing bottom is used, then structure is simple, but adhesive distribution is uneven and fluidity is poor
Solution Approach 1:
The flat bottom surface is transformed into a stepped three-dimensional structure with multiple height levels. This dimensional enhancement improves adhesive distribution and fluidity while maintaining relative structural simplicity through the use of plate-like steps that can be integrated into the existing casing design.
Solution Approach 2:
The bottom surface is segmented into multiple stepped levels rather than remaining as a single flat plane. This segmentation creates distinct zones that guide adhesive flow and improve distribution, while the modular stepped design keeps the overall structure manageable and manufacturable.
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 improves adhesive fluidity, allowing for uniform adhesive distribution and easier assembly by facilitating complete cell immersion and reducing the risk of adhesive stagnation.
Implementation Method 1
the inner bottom surface of the casing has a stepped surface for dividing the inner bottom surface of the casing into at least two placement areas having a height difference in the height direction of the casing... providing a force to the adhesive located in the placement area with a higher height, helping the adhesive flow toward the placement area with lower height
Data Source
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AI summary
Disclosed is a battery pack, including: multiple cells (210); a casing (100), wherein the inner bottom surface (10) of the casing (100) has a stepped surface for dividing the inner bottom surface (10) of the casing (100) into at least two placement areas (11) having a height difference in the height direction of the casing (100), and the cells (210) are placed in each of the placement areas (11). With stepped surfaces disposed on the inner bottom surface (10) of the casing (100), the battery pack may form at least two placement areas (11) with height differences within the casing (100), making it possible to provide a force to the adhesive located in the placement area with a higher height, helping the adhesive flow toward the placement area with lower height.