Battery Case Gas Adsorption Pack for Pouch Cell Swelling
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Solution Overview
Problem
Pouch-type secondary batteries face challenges in safely managing generated gas without additional sensing devices, leading to potential explosion and inoperability due to inadequate gas release mechanisms.
Innovation Solution
A battery case with a gas adsorption pack containing a gas adsorbent and a shape memory alloy that automatically opens to adsorb generated gas when internal temperature increases, using a nickel-titanium alloy to penetrate the pack and expose the adsorbent, thereby preventing case deformation and maintaining battery stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional battery case structure is used, then the manufacturing process is simple, but the battery case cannot effectively prevent deformation of the battery pack and has poor impact resistance
Solution Approach 1:
The battery case employs a nested structure where the reinforcement rib is integrated within the case body. The reinforcement rib is formed as an internal structural element during the injection molding process, creating a composite structure that enhances strength without adding external complexity. This nested design allows the case to resist deformation and impact while maintaining a streamlined external appearance.
Solution Approach 2:
The battery case utilizes composite material properties by combining the base case material with the reinforcement rib structure. The reinforcement rib is made from the same material as the case body but is strategically positioned to create areas of enhanced mechanical strength. This composite approach allows different regions of the case to have different structural properties, with the reinforcement rib providing localized strength enhancement.
2Strength
If the battery case structure is reinforced to prevent deformation, then the strength increases, but the amount of material used increases
Solution Approach 1:
The reinforcement rib is strategically positioned at specific locations within the battery case where structural strength is most needed, such as areas prone to deformation or impact. This localized reinforcement approach ensures that material is concentrated only where necessary to prevent deformation, rather than uniformly throughout the entire case structure, thereby optimizing material usage.
Solution Approach 2:
The reinforcement rib is nested within the case body structure, utilizing the same injection molding process to create an integrated design. This nested configuration allows the reinforcement element to be formed from the base material without requiring additional material layers or components, thus enhancing strength while minimizing material quantity.
3Strength
If multiple separate components are used to reinforce the battery case, then the strength and impact resistance improve, but the assembly process becomes complex
Solution Approach 1:
The reinforcement rib is merged with the case body into a single integrated component formed by the injection molding process. This merging eliminates the need for separate assembly steps to attach reinforcement elements, as the reinforcement structure is created directly during case manufacturing. The result is a simplified manufacturing process that reduces assembly complexity while maintaining enhanced strength and impact resistance.
Solution Approach 2:
The injection molding process serves multiple functions: it forms the basic case structure, creates the reinforcement rib, and integrates both elements into a single component. This multi-functional approach to manufacturing eliminates the need for separate processes to create and assemble reinforcement elements, thereby simplifying the overall manufacturing process while achieving the desired structural strength.
Data Source
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AI summary
The present invention relates to a battery case and a secondary battery.More particularly, the present invention relates to a battery case including a battery case and a gas adsorber accommodated inside the case, wherein a gas adsorption pack is opened as the internal temperature of the case increases; and a secondary battery. According to the present invention, the present invention has an effect of providing a battery case capable of quickly adsorbing gas generated inside a secondary battery due to abnormal operation or degradation of the secondary battery by opening a gas adsorption pack filled with a gas adsorbent accommodated inside the case without an additional system or sensing device to secure the stability of the secondary battery, prevent deformation of the case, and reduce the resistance of the secondary battery and allowing the secondary battery to be operated even after the gas adsorption pack is opened; and a secondary battery.