Battery Bonding Tape Structure for Thin, Drop-Resistant Fixing
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Solution Overview
Problem
Existing battery-fixing methods, such as double-sided tape and wrapping films, impair energy density and make non-destructive disassembly challenging, leading to potential battery damage and safety issues during repair.
Innovation Solution
A battery-fixing bonding tape with a 3-layer structure comprising a substrate layer and two adhesive layers, where the second adhesive layer has a first region and a second region, and an original film to avoid adhesion with components, allowing for non-destructive disassembly and improved anti-drop performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If double-sided tape and wrapping film are used to bond the battery to the battery compartment, then the battery is securely fixed, but the overall thickness increases (140 μm to 170 μm) impairing energy density
Solution Approach 1:
The patent merges the substrate layer and adhesive layers into an integrated bonding tape structure, where the substrate layer provides mechanical strength and the adhesive layers provide bonding capability. This combination achieves secure battery fixation while reducing the overall thickness compared to separate wrapping film and double-sided tape configurations.
Solution Approach 2:
The bonding tape employs composite material structure with a substrate layer (providing structural support) and adhesive layers (providing bonding function). This composite approach allows optimization of each layer's properties to achieve both strong bonding and reduced thickness, directly addressing the contradiction between bonding strength and thickness.
2Strength
If double-sided tape is used to bond the battery, then the battery is securely fixed, but the battery is prone to scratching or breakage during disassembly requiring sharp tools
Solution Approach 1:
The patent applies different adhesive layers with different properties at different locations: the first adhesive layer bonds to the battery with controlled adhesion strength, while the second adhesive layer bonds to the battery compartment. This local differentiation allows the battery to be easily detached from one side while maintaining secure fixation during use, resolving the contradiction between strong bonding and easy disassembly.
Solution Approach 2:
The bonding tape is segmented into multiple functional layers: substrate layer for structural support, first adhesive layer for battery bonding, and second adhesive layer for compartment bonding. This segmentation allows independent optimization of each layer's bonding characteristics, enabling easy disassembly while maintaining secure fixation during operation.
3Strength
If the second adhesive layer has large bonding area, then the battery is securely fixed in the battery compartment, but the adhesive may adhere to other components causing damage
Solution Approach 1:
The second adhesive layer is designed with spatially differentiated properties: it has strong adhesion capability for bonding to the battery compartment while incorporating release properties that prevent unwanted adhesion to other components. This local quality differentiation allows secure fixation while avoiding adhesive contamination of surrounding components.
Solution Approach 2:
The substrate layer acts as an intermediary between the adhesive layers and external components, providing a barrier that prevents the adhesive from directly contacting and adhering to other components in the battery compartment, thus resolving the contradiction between strong fixation and avoidance of adhesive contamination.
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 bonding tape reduces overall thickness, enhances energy density, and improves anti-drop performance by controlling adhesive forces and areas, facilitating safe and efficient battery removal.
Implementation Method 1
The first adhesive layer is configured to be bonded to a battery
Implementation Method 2
The second region is configured to be bonded to a battery compartment
Data Source
AI summary
A bonding tape for a battery includes a first adhesive layer, a second adhesive layer, a substrate layer, and an original film. The first adhesive layer and the second adhesive layer are located on two sides of the substrate layer respectively. The first adhesive layer is bonded to a battery. The second adhesive layer includes a first region and a second region. The original film is disposed in the first region. The second region is bonded to a battery compartment. A through-hole is created on the original film. The bonding tape of this application reduces an overall thickness of adhesive tape, improves the energy density of the battery, and at the same time, improves the anti-drop performance of the battery and increases a drop window pass rate.