Battery Pack Rib Structure for Mechanical Stability
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Solution Overview
Problem
Existing battery packs lack mechanical stability and durability, particularly in applications involving portable devices and electric vehicles.
Innovation Solution
A battery pack design incorporating a plurality of battery cells arranged with ribs, a frame, and an upper label, wherein the ribs include a first region, a second region, and a connection portion connecting the ribs to each other, with a first region and a second region, and a connection portion connecting the ribs to each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple frame structure is used to accommodate battery cells, then the device complexity is reduced, but the mechanical stability and durability deteriorate
Solution Approach 1:
The frame is segmented into multiple ribs (first ribs and second ribs) that are arranged between battery cells. Each rib is further divided into a first region, second region, and connection portion. This segmentation allows the frame to provide enhanced mechanical support and stability while maintaining a relatively simple overall structure that accommodates the battery cells effectively.
Solution Approach 2:
Different regions of the ribs have different thicknesses to provide localized structural properties. The second region has a greater thickness than the first region, creating local reinforcement at critical positions where additional mechanical strength is needed. This local quality enhancement improves mechanical stability without significantly increasing overall device complexity.
2Manufacturing precision
If uniform thickness ribs are used, then the manufacturing precision is improved, but the mechanical strength and durability worsen
Solution Approach 1:
The ribs are designed with non-uniform thickness, where the second region has a greater thickness than the first region. This local quality variation provides enhanced mechanical strength at the second region while maintaining manufacturing precision through controlled thickness variations. The connection portion bridges these different thickness regions to ensure structural integrity.
Solution Approach 2:
The thickness parameter of the ribs is changed along their length, transitioning from a thinner first region to a thicker second region. This parameter change optimizes the mechanical strength distribution within the ribs, providing additional strength where needed while maintaining overall manufacturing precision through controlled dimensional variations.
3Reliability
If the ribs are made thicker to improve mechanical stability, then the strength is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of making the entire rib structure uniformly thicker, only specific regions (the second region) are thickened to provide local reinforcement. This approach improves mechanical stability and strength at critical positions while avoiding the need to increase the thickness of the entire rib, thereby limiting the increase in device complexity and manufacturing difficulty.
Solution Approach 2:
The rib is divided into distinct segments (first region, second region, and connection portion) with different thicknesses. This segmentation allows for targeted reinforcement where mechanical strength is most needed, while keeping other portions of the rib simpler and easier to manufacture. The connection portion provides a smooth transition between regions of different thicknesses.
Data Source
AI summary
A battery pack includes a plurality of battery cells arranged adjacent to one another, ribs arranged respectively between battery cells of the plurality of battery cells, a frame connected to opposite end portions of the ribs and accommodating the plurality of battery cells together with the ribs, and an upper label attached to an upper surface of the frame, and the upper label includes at least one opening that is recessed from the frame in a direction toward the ribs, and the ribs each include a first region overlapping with the upper label, a second region located to correspond to the opening and having a thickness greater than a thickness of the first region, and a connection portion connecting the first region and the second region to each other.