Retainer Segmentation for Battery Impact Resistance
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Solution Overview
Problem
Rechargeable batteries face issues with external impact damage and electrical shorts, which can lead to reduced durability and reliability.
Innovation Solution
The use of first and second retainers connected to the current collecting plates of the electrode assembly, along with an elastic plate coupled to a retainer, provides stabilization and protection against external impacts, preventing damage and electrical shorts while improving durability by absorbing vibration energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If retainers are connected to current collecting plates to prevent external impact damage, then durability is improved, but device complexity increases
Solution Approach 1:
The retainer is divided into multiple retention portions (first retention portion, second retention portion, third retention portion) that are distributed at different locations on the current collecting plate. This segmentation allows the retainer to provide comprehensive protection against external impacts from different directions while maintaining a relatively simple overall structure. Each retention portion targets specific vulnerability zones, resolving the contradiction between enhanced durability and structural simplicity.
Solution Approach 2:
The retainer extends in multiple spatial dimensions with retention portions positioned at different heights and locations relative to the current collecting plate. This multi-dimensional configuration provides comprehensive mechanical support and impact resistance without requiring a complex assembly of multiple separate components, thus improving durability while controlling device complexity.
2Reliability
If retainers are connected to current collecting plates to prevent electrical shorts, then electrical reliability is improved, but device complexity increases
Solution Approach 1:
The retainer is segmented into multiple retention portions positioned at different locations on the current collecting plate. This segmentation allows strategic placement of retention structures only where needed for electrical isolation and mechanical support, preventing electrical shorts between adjacent cells while avoiding unnecessary complexity in regions where protection is not required.
Solution Approach 2:
The retainer serves multiple functions simultaneously: it provides mechanical support to prevent cell movement, isolates electrical connections to prevent shorts, and distributes stress to improve durability. This multi-functionality eliminates the need for separate components for each function, improving electrical reliability while minimizing the increase in device complexity.
3Duration of action of stationary object
If an elastic plate is coupled to the retainer to absorb vibration energy, then durability is improved, but device complexity increases
Solution Approach 1:
The elastic plate is merged with the retainer structure, forming an integrated vibration absorption system. The elastic plate is coupled to the retention portions and works in conjunction with them to absorb vibration energy and reduce stress on the current collecting plate. This merging approach provides enhanced durability through vibration damping while avoiding the complexity of a completely separate vibration isolation system.
Solution Approach 2:
The elastic plate is made of elastic material that combines with the rigid retainer structure to create a composite system. This composite structure provides both the mechanical support needed for structural integrity and the vibration absorption capability to improve durability, while maintaining relative simplicity compared to using multiple separate components.
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
The solution effectively prevents damage from external impacts, enhances electrical reliability by preventing shorts, and increases the battery's durability through improved structural support and energy absorption.
Implementation Method 1
an elastic plate coupled to a retainer connected to the current collecting plates of an electrode assembly, thereby allowing the elastic plate to serve as an elastic body during welding and improving durability by absorbing vibration energy
Data Source
AI summary
A rechargeable battery includes an electrode assembly, a first current collecting plate and a second current collecting plate spaced apart from each other and electrically connected to first and second electrode uncoated regions n the electrode assembly, a case receiving the electrode assembly, a cap plate sealing the case, a first electrode terminal and a second electrode terminal extending through the cap plate and electrically connected to the first and second current collecting plates, a first retainer adjacent to the cap plate and coupled to firsts regions of the first and second current collecting plates, and a second retainer coupled to second regions of the first and second current collecting plates or to the first and second electrode uncoated regions, the first and second regions of the first and second current collecting plates being different from each other.