Battery Binder Package With Low-Adhesion Storage and Sealed Feeding
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Solution Overview
Problem
Conventional packaged products of binder compositions for secondary batteries fail to adequately suppress deterioration in quality during storage, leading to defects in the battery coating and performance degradation.
Innovation Solution
A packaged binder product with a container design featuring a liquid feeding adapter, pipe, and cap body, along with a specific contact angle between the binder composition and the container wall, which minimizes contact with the inner wall and reduces aggregation, combined with a core-shell structured particulate polymer and anti-drying agents, to maintain binder quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the binder composition is stored in a conventional container, then the binder composition can be stored for later use, but the quality of the binder composition deteriorates due to aggregation and contact with the inner wall of the container
Solution Approach 1:
The patent changes the physical parameter of the container inner wall surface by controlling the contact angle between the binder composition and the inner wall surface to be 10 degrees or more. This parameter change prevents the binder composition from adhering to the container wall, thereby suppressing aggregation and maintaining quality during storage.
Solution Approach 2:
The patent introduces an intermediary mechanism by using a container with a specific surface property (contact angle ≥10 degrees) that acts as a mediator between the binder composition and the storage environment. This intermediary prevents direct harmful contact between the binder composition and the container wall, suppressing aggregation.
2Productivity
If the binder composition is fed from the container to the coating device, then the binder composition can be delivered for use, but coarse particles are incorporated from the environment causing defects
Solution Approach 1:
The liquid feeding pipe serves as an intermediary conduit that enables delivery of the binder composition while isolating it from environmental contamination. The sealed connection between the container and the pipe prevents coarse particles from entering the binder composition during the feeding process.
Solution Approach 2:
The patent applies local quality by creating a sealed feeding interface at the specific location where the binder composition exits the container. The liquid feeding pipe with its sealed connection provides localized protection against contamination only where needed during the feeding process.
3Quantity of substance
If the binder composition contacts the inner wall of the container during storage, then the binder composition is contained, but aggregates form due to evaporation and contact
Solution Approach 1:
The patent changes the surface property parameter of the container inner wall by controlling the contact angle to be 10 degrees or more. This parameter change creates a non-adhering surface that prevents the binder composition from contacting and aggregating on the container wall during storage.
Solution Approach 2:
The patent converts the potentially harmful effect of container wall contact into a beneficial outcome by designing the container surface to have specific repellent properties. The container wall, which could cause aggregation, is transformed into a protective element that actively prevents aggregation through its surface properties.
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 deterioration of the binder composition and reduces defects in the resulting battery, ensuring high-quality performance and ease of extraction.
Implementation Method 1
a contact angle θB between the binder composition and an inner wall surface of the container is equal to or greater than 10°
Data Source
Figure 1
Figure 2
AI summary
A packaged binder product including a container, and a binder composition for secondary battery accommodated in an internal space of the container, wherein: the container includes an accommodation part, a liquid feeding adapter, a liquid feeding pipe, and a cap body; the liquid feeding adapter is disposed to engage with the opening of the accommodation part; the liquid feeding pipe has a top-portion side end that engages with the liquid feeding adaptor; the liquid feeding adaptor and liquid feeding pipe constitute a liquid delivery path that allows opening on the bottom-portion side end of the liquid feeding pipe to communicate with a top-portion side of the container; the cap body is disposed to detachably engage with the liquid feeding adapter to seal liquid delivery path; and contact angle θB between the binder composition and an inner wall surface of the container is equal to or greater than 30°.