Electrode Assembly Finishing Tape for Vibration and Insulation
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Solution Overview
Problem
Existing secondary batteries face challenges in concurrently securing vibration characteristics and insulation functions while ensuring easy installation of current collection plates, particularly due to the need for proper insulation between the positive electrode plate and the can.
Innovation Solution
A secondary battery design incorporating a finishing tape with a fixing member made of OPS or TPV and an insulation member made of PET, PP, or PI, which are integrally formed with an adhesive layer, allowing for secure attachment and insulation of the electrode assembly, and facilitating easy installation of current collection plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a finishing tape with adhesive layer is applied to surround the circumferential surface of the electrode assembly, then vibration characteristics are secured, but insulation function between the positive electrode plate and the can deteriorates
Solution Approach 1:
The finishing tape is divided into two distinct regions: a first region with an adhesive layer for securing vibration characteristics, and a second region without an adhesive layer for maintaining insulation function. This segmentation allows each region to perform its specific function independently, resolving the contradiction between vibration resistance and insulation.
Solution Approach 2:
Different regions of the finishing tape are assigned different properties: the first region has adhesive properties for vibration control, while the second region has insulating properties without adhesive. This local differentiation of quality enables the finishing tape to simultaneously achieve both vibration characteristics and insulation function in different areas.
2Reliability
If a finishing tape is applied to secure vibration characteristics and insulation function, then reliability is improved, but device complexity increases due to multiple components
Solution Approach 1:
The invention merges the functions of multiple separate components (vibration-resistant tape and insulating tape) into a single finishing tape with two distinct regions. This integration reduces the number of components and assembly steps while maintaining both vibration characteristics and insulation function, thereby improving reliability without increasing device complexity.
Solution Approach 2:
The finishing tape is designed as a multi-functional component that simultaneously provides vibration resistance through its adhesive region and insulation through its non-adhesive region. This universal design eliminates the need for separate vibration-resistant and insulating components, reducing overall device complexity while maintaining both functions.
3Manufacturing precision
If a finishing tape with adhesive layer is applied to the entire surface, then manufacturing precision is improved, but ease of operation deteriorates due to difficulty in installing current collection plates
Solution Approach 1:
The adhesive layer is segmented to be formed only in the first region of the finishing tape, while the second region remains without adhesive. This segmentation allows current collection plates to be easily installed in the non-adhesive second region without interference from adhesive, while still maintaining manufacturing precision in the adhesive first region for vibration control.
Solution Approach 2:
The finishing tape exhibits local quality differentiation where the first region has adhesive properties for precise manufacturing and vibration control, while the second region has non-adhesive properties that facilitate easy installation of current collection plates. This local quality variation resolves the contradiction between manufacturing precision and ease of operation.
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 design concurrently secures vibration characteristics and insulation functions, reduces processing costs and time, and simplifies the installation of current collection plates by using a single finishing tape with a strategically designed adhesive layer.
Implementation Method 1
a first region which has an adhesive layer formed thereat to surround the circumferential surface of the electrode assembly
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
An embodiment of the present invention provides a secondary battery capable of concurrently securing a vibration characteristic and an insulation function of an electrode assembly by using one finishing tape. To this end, a secondary battery according to an embodiment of the present invention may comprise: an electrode assembly including a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate; a can for receiving the electrode assembly; a cap assembly for sealing the can; a first current collection plate provided above the electrode assembly and electrically connected to the first electrode plate and the cap assembly, respectively; a second current collection plate provided under the electrode assembly and electrically connected to the second electrode plate and the can, respectively; and a finishing tape having a first region which has an adhesive layer formed thereat to surround the circumferential surface of the electrode assembly, and a second region which can surround a space beyond the upper end of the electrode assembly.