Battery Pack Cell Cover Venting Without Module Cases
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Solution Overview
Problem
Conventional battery packs face challenges in energy density, assembly complexity, and safety due to modularization and the need for additional components like stacking frames and module cases, which also complicate cooling and gas venting.
Innovation Solution
A battery pack design featuring a ductile cell cover that surrounds battery cells within a pack case, eliminating the need for a module case and stacking frames, with a rupturable sheet and shape memory alloy for controlled gas venting and improved safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional modularization with module cases and stacking frames is used, then assembly structure is provided, but energy density decreases due to increased volume and reduced battery cell space
Solution Approach 1:
The patent removes the module case and stacking frame components from the conventional modularization structure. Battery cells are directly stacked and fixed within the pack case using simplified positioning structures, eliminating the unnecessary volume occupied by module cases and stacking frames, thereby increasing the space available for battery cells and improving energy density while maintaining adequate assembly structure
Solution Approach 2:
The patent merges the functions of the module case and stacking frames into a simplified positioning structure integrated within the pack case. The positioning structures directly secure battery cells in stacked configuration without requiring separate module cases and stacking frames, reducing overall volume and improving space utilization for battery cells
2Reliability
If modularization with multiple components is implemented, then battery pack structure is formed, but manufacturing complexity increases
Solution Approach 1:
The patent extracts and removes the module case and stacking frame components from the manufacturing process. Battery cells are directly installed and positioned within the pack case using integrated positioning structures, eliminating the need to manufacture, assemble, and manage multiple separate components, thereby significantly reducing manufacturing complexity while maintaining structural integrity
Solution Approach 2:
The patent combines the structural support and cell positioning functions into integrated positioning structures within the pack case, eliminating the need for separate module cases and stacking frames. This merging of functions reduces the number of parts to be manufactured and assembled, simplifying the overall manufacturing process
3Temperature
If conventional cooling structures are used with modularization, then cooling function is provided, but device complexity increases
Solution Approach 1:
The pack case is designed to serve multiple functions: it provides structural containment for battery cells, integrates positioning structures for cell support, and incorporates cooling channels for thermal management. This multi-functionality eliminates the need for separate dedicated cooling structures, reducing device complexity while maintaining effective cooling capability
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 enhances energy density, simplifies assembly, improves safety by controlled gas discharge, and reduces manufacturing complexity while maintaining robustness and efficient cooling.
Implementation Method 1
a rupturable sheet and shape memory alloy for controlled gas venting and improved safety
Data Source
AI summary
A battery pack according to an embodiment of the present disclosure includes a plurality of battery cells stacked in one direction; a pack case that houses the battery cells in an inner space; a cell cover that at least partially surrounds at least a part of the plurality of battery cells in the inner space of the pack case; and a rupturable sheet formed between an upper portion of the cell cover and the battery cell.