Cell Stack Support Frame and Venting Layout for Battery Packs
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Solution Overview
Problem
There is a need for an efficient structure that allows easy coupling of the lead part of a cell stack and a busbar in battery packs, particularly in the context of cell-to-pack configurations, while ensuring safe venting and thermal management.
Innovation Solution
A battery pack design featuring a crossing member that divides the accommodation space for cell stacks, with rotatable supporting frames and busbars connected to lead parts, and a venting passage system that includes communication holes and venting holes for safe venting and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery cells are mounted in the form of a cell stack with lead parts protruding toward the crossing member, then the electrical connection between lead parts and busbars is improved, but the complexity of aligning and coupling the components increases
Solution Approach 1:
The supporting frame is designed to be rotatable relative to the battery housing, allowing the frame to be adjusted to different angular positions. This dynamic adjustment capability enables precise alignment of the lead parts with the busbars during assembly, ensuring reliable electrical connection while simplifying the coupling process through movable adjustment rather than fixed rigid positioning
Solution Approach 2:
The supporting frame is divided into multiple independent supporting frame areas that can rotate relative to each other. Each supporting frame area can be independently adjusted to align its associated lead parts with the corresponding busbars, allowing segmented alignment of multiple electrical connections without requiring simultaneous complex positioning of the entire structure
2Ease of operation
If the supporting frame is made rotatable to facilitate alignment, then the ease of assembly is improved, but the structural stability may be compromised
Solution Approach 1:
The supporting frame incorporates rotatable joints that allow controlled movement during assembly but maintain structural integrity when positioned. The rotational capability is designed to enable easy alignment operations while the frame's rigid construction and secure mounting to the battery housing ensure stability is maintained during normal operation
Solution Approach 2:
The rotatable supporting frame allows preliminary alignment adjustments to be made before final securing of the battery pack components. This preliminary positioning action enables accurate alignment of lead parts with busbars before the structure is locked into its final stable configuration
3Reliability
If communication holes are provided in the supporting frame for venting, then the safety through thermal management is improved, but the structural integrity of the supporting frame is reduced
Solution Approach 1:
The supporting frame incorporates communication holes that allow gases and heat to pass through from the cell stacks to the exterior. These openings provide thermal management and safety venting pathways while the surrounding frame structure maintains sufficient structural integrity to support the battery cells and electrical connections
Solution Approach 2:
The venting function is distributed through multiple communication holes positioned at different locations in the supporting frame rather than requiring a single large opening. This segmented approach to venting provides adequate thermal management and safety relief while preserving the overall structural strength of the frame
Data Source
AI summary
Disclosed is a battery pack including a battery housing defining an accommodation space, and including a crossing member extending in a first direction to divide the accommodation space, a plurality of cell stacks mounted in the accommodation space to face each other in a second direction crossing the first direction with the crossing member being interposed therebetween, and a supporting frame supporting the plurality of cell stacks, and configured such that a portion thereof is rotatable with respect to another portion thereof. The crossing member includes a venting passage extending in the first direction between the plurality of cell stacks, and communicated with each of the plurality of cell stacks.