Battery Housing Adhesive Surface for Electrode Impact Buffering
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Solution Overview
Problem
Secondary batteries face damage and safety risks due to movement-induced collisions between the electrode assembly and the housing, leading to potential damage and safety hazards when used in electric devices.
Innovation Solution
An electrochemical apparatus with a housing featuring a first adhesive portion on its outer surface, having a contact angle greater than 105°, which reduces adhesion and allows partial deformation of the housing during movement, thereby buffering the impact of the electrode assembly and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electrode assembly is disposed within the housing with movement space, then the electrode assembly can accommodate expansion and contraction during charging and discharging, but the electrode assembly may collide with the housing during device movement, causing damage and safety risks
Solution Approach 1:
The housing is designed with flexible characteristics, allowing it to undergo partial deformation when the electrode assembly moves during device movement. This flexibility enables the housing to absorb impact forces without damage, resolving the contradiction between accommodating electrode movement and preventing housing damage
Solution Approach 2:
The design provides movement space between the electrode assembly and housing before collisions occur. This pre-established space acts as a cushion that absorbs impact forces during unexpected movements, preventing direct contact and potential damage between the electrode assembly and housing
2Stability of the object's composition
If the housing is rigidly fixed to the electric device, then the secondary battery remains stable during operation, but the electrode assembly cannot move freely, causing increased collisions with the housing
Solution Approach 1:
The housing is designed with flexible characteristics that allow it to deform partially during electrode assembly movement. This flexibility enables the housing to accommodate electrode motion without rigid constraint, reducing collision frequency while maintaining overall battery stability through the housing's structural integrity
3Reliability
If the housing is made deformable to accommodate electrode assembly movement, then collision impact is reduced, but the adhesion strength between the housing and electric device may be compromised
Solution Approach 1:
The housing is designed with differentiated local properties: certain regions are made deformable to accommodate electrode assembly movement and absorb impact forces, while other regions maintain rigid characteristics to ensure strong adhesion to the electric device. This spatial differentiation of mechanical properties resolves the contradiction between impact absorption and adhesion strength
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 extends the service life of the electrochemical apparatus and reduces safety risks by minimizing the impact of the electrode assembly on the housing, ensuring stable operation and user safety.
Implementation Method 1
a contact angle of a surface of the first adhesive portion facing away from the housing is greater than 105°
Data Source
AI summary
An electrochemical apparatus includes: a housing, an electrode assembly, and a first adhesive portion. The electrode assembly is disposed within the housing, and the first adhesive portion is disposed on an outer surface of the housing, where a contact angle of a surface of the first adhesive portion facing away from the housing is greater than 105°. The electrochemical apparatus in is less prone to damage.