Pouch Secondary Battery Support Plate for Drop Impact Stability
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Solution Overview
Problem
Secondary batteries with pouch-type configurations are prone to electrode assembly movement and deformation due to external impacts, such as falling, which can lead to short-circuits.
Innovation Solution
A secondary battery design that includes a support plate coupled to and partially inserted into one end of the electrode assembly, providing structural support to prevent movement and deformation during external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electrode assembly is accommodated in a pouch case without additional support structures, then the device complexity is reduced and manufacturing is simplified, but the electrode assembly becomes vulnerable to movement and deformation due to external impacts
Solution Approach 1:
A support plate is introduced as an intermediary component between the electrode assembly and the pouch case. The support plate receives impact forces from external impacts and transfers them to the pouch case, preventing direct transmission of forces to the electrode assembly. This mediator structure protects the electrode assembly from movement and deformation while maintaining overall structural simplicity.
Solution Approach 2:
The support plate is positioned at the lower end of the electrode assembly to provide preemptive protection against external impacts. By having this support structure in place before any impact occurs, the electrode assembly is already protected from movement and deformation when impacts happen during battery handling or use.
2Device complexity
If the support plate is designed with a simple base plate structure, then the device complexity is minimized, but the ability to prevent electrode assembly movement and deformation is insufficient
Solution Approach 1:
The support plate is segmented into two functional parts: a base plate that covers the lower end surface of the electrode assembly and provides broad support, and a rib that extends upward to insert into the electrode assembly for direct mechanical coupling. This segmentation allows each part to perform its specific function optimally while keeping the overall structure simple and manufacturable.
Data Source
AI summary
Disclosed is a secondary battery comprising: an electrode assembly in which a first electrode plate, a second electrode plate, and a separator are rolled up; and a support plate which is coupled to one end surface of the electrode assembly where the rolled first electrode plate, second electrode plate, and separator are exposed, so as to support the electrode assembly. A secondary battery according to an embodiment of the present invention comprises a support plate coupled to the lower end of an electrode assembly, whereby, when the secondary battery falls, movements of the electrode assembly can be prevented, and deformation of the electrode assembly due to an external impact can be suppressed.