Battery Cell Support Plate Venting for Thermal Runaway Relief
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Solution Overview
Problem
Existing battery cells face challenges in safely managing internal pressure during thermal runaway, leading to limited fluid discharge rates and potential safety hazards due to blocked pressure relief mechanisms.
Innovation Solution
A battery cell design featuring a support plate with a weak portion aligned with the pressure relief mechanism, allowing for controlled fluid guidance and timely discharge by ensuring the weak portion's dimensions match the relief mechanism's outline, ensuring fluid is accurately directed for release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a battery cell is designed to achieve high volumetric energy density, then the battery pack can be made more compact, but the manufacturing complexity and cost increase due to complex three-dimensional configurations
Solution Approach 1:
The battery pack is divided into modular battery cell groups that can be independently manufactured and assembled. Each module contains a standardized arrangement of battery cells, allowing for simplified manufacturing processes while achieving high volumetric energy density through modular stacking configurations.
Solution Approach 2:
Battery cells are arranged in nested three-dimensional configurations where cells are positioned within modular frameworks. This nesting approach maximizes space utilization and volumetric energy density while maintaining standardized interfaces that simplify manufacturing and assembly processes.
2Quantity of substance
If battery cells are arranged in complex three-dimensional configurations to maximize space utilization, then volumetric energy density improves, but manufacturing precision requirements increase
Solution Approach 1:
The complex three-dimensional arrangement is segmented into standardized modular units with predefined cell positions and orientations. Each module serves as a pre-assembled building block that reduces overall assembly precision requirements while maintaining high volumetric energy density through optimized modular stacking.
Solution Approach 2:
Standardized mechanical interfaces and dimensional parameters are implemented for battery cell mounts and connectors. These parameter standardizations enable automated assembly processes and reduce precision requirements by providing tolerance compensation mechanisms in the modular design.
3Productivity
If modular battery cell groups with standardized interfaces are used, then assembly automation and productivity improve, but device complexity increases due to modular architecture
Solution Approach 1:
Multiple battery cells and their interconnections are merged into integrated modular groups with standardized interfaces. This merging reduces the number of discrete assembly operations required and enables automated handling, while the modular architecture itself is simplified through standardized mechanical and electrical connection protocols.
Solution Approach 2:
The modular battery cell groups are designed with universal interfaces that can accommodate different cell types and configurations within the same module framework. This universality reduces overall system complexity by using a single standardized interface design across all modules, while still enabling flexible assembly configurations for high productivity.
Data Source
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AI summary
The present application discloses a battery cell, a battery and an electrical device. The battery cell comprises an electrode assembly, a shell, a pressure relief mechanism and a support plate, wherein the shell is used for accommodating the electrode assembly and comprises a first side plate; the pressure relief mechanism is arranged on the first side plate and is configured to be actuated when the internal pressure of the battery cell reaches a first threshold, so as to release the internal pressure; the support plate is arranged between the first side plate and the electrode assembly; the support plate is provided with a weak portion which is opposite to the pressure relief mechanism in the thickness direction of the first side plate; the shape of the weak portion is the same as that of the outline of the pressure relief mechanism, and the external dimension of the weak portion is not greater than the dimension of the outline of the pressure relief mechanism; the support plate is configured to rupture along the weak portion when the internal pressure of the battery cell reaches a second threshold, so as to form a channel for guiding fluid to the pressure relief mechanism. The technical solutions in the embodiments of the present application can effectively improve the safety of battery cells.