Battery Pack Cell Stack and Partition Wall Integration
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Solution Overview
Problem
Existing battery packs face limitations in increasing energy density due to dead space from modular design, compromised heat dissipation, and structural rigidity, which also affects the support and assembly of battery cells.
Innovation Solution
The battery pack design incorporates a cell stack unit with adjacent partition wall members, where the cell stack units and partition wall members are integrated within the pack housing, eliminating gaps and enhancing structural support, heat transfer, and assembly efficiency, with features like hollow portions for swelling absorption and a thermally conductive casing for improved cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a modular battery module structure with module housing is used, then assembly and manufacturing are simplified, but dead space increases and energy density decreases
Solution Approach 1:
The invention extracts the module housing from the system by directly installing battery cells into the pack housing without intermediate module housings. This eliminates the dead space created by module housing thickness while maintaining modular assembly benefits through direct cell-to-pack integration.
Solution Approach 2:
The invention merges the module housing function directly into the pack housing structure. Battery cells are directly mounted in the pack housing, combining what were previously separate components (module housing and pack housing) into a more integrated configuration that eliminates intermediate dead spaces.
2Stability of the object's composition
If partition walls are installed to secure structural rigidity, then structural stability is improved, but dead space increases and energy density decreases
Solution Approach 1:
The invention applies local quality by installing partition walls only at specific locations where structural rigidity is most needed, rather than creating a complete grid pattern. This selective placement provides necessary structural support while minimizing the volume occupied by partition walls.
Solution Approach 2:
The invention uses partial action by implementing partition walls at critical structural points only, rather than providing complete coverage. This partial implementation achieves sufficient structural rigidity while minimizing space consumption.
3Ease of operation
If separation space is maintained for assembly tolerance and swelling absorption, then assembly ease and cell safety are improved, but dead space increases and energy density decreases
Solution Approach 1:
The invention incorporates swelling absorption features directly into the partition wall structure, providing beforehand cushioning for cell expansion. The partition walls include integrated mechanisms to accommodate cell swelling without requiring additional separation space.
Solution Approach 2:
The invention merges the separation space function with the partition wall structure itself. The partition walls are designed to provide both structural division and swelling accommodation in a single integrated component, eliminating the need for additional gap space.
4Strength
If module housing with sufficient thickness is used to support battery cells, then structural support is improved, but heat transfer path becomes complicated and heat dissipation performance deteriorates
Solution Approach 1:
The invention extracts the intermediate module housing that created thermal resistance. By directly mounting battery cells in the pack housing, the heat transfer path is shortened and simplified, allowing more direct thermal contact between cells and cooling structures.
Solution Approach 2:
The invention uses the pack housing and partition walls as direct thermal mediators between battery cells and cooling systems. These structures provide both mechanical support and enhanced thermal conduction pathways, eliminating the need for thick module housings that impeded heat transfer.
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 configuration allows for a higher energy density, improved heat dissipation, enhanced structural rigidity, and better support for heavy battery cells, while simplifying assembly and reducing dead space, thus overcoming the limitations of previous designs.
Implementation Method 1
a heat transfer member 23 formed of thermal grease, thermal adhesive, thermally conductive epoxy, a heat dissipation pad, or the like, may be disposed between a lower surface of the battery cell 22 and a bottom surface of the module housing 21 to facilitate dissipation of heat generated in the battery cell 22
Implementation Method 2
A cooling member 30 may be installed below the pack housing 11 to form a cooling flow path 31 through which a cooling fluid flows so as to discharge heat, generated inside the battery module 20, for example, in the battery cell 11, to an outside of the battery cell 22
Data Source
AI summary
A battery pack includes a plurality of cell stack units, each stack unit including a stack of a plurality of battery cells, a partition wall member disposed between the cell stack units adjacent to each other, and a pack housing accommodating the plurality of cell stack units and a plurality of partition wall members. The cell stack unit and the partition wall member are accommodated in the pack housing while side surface of the cell stack unit and a side surface of the partition wall member are in contact with each other, and the partition wall member is fixed to a bottom surface of the pack housing.