Battery Termination Tape and Electrolyte Tuning for High-Temperature Safety
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Solution Overview
Problem
Lithium-ion batteries face safety hazards due to high-temperature-induced deformation and warping of termination tapes, leading to potential short-circuits and safety accidents.
Innovation Solution
The battery design includes a positive electrode plate with a termination tape having a specific area-to-width ratio and a non-aqueous electrolyte solution containing fluoroethylene carbonate, which enhances high-temperature safety performance by minimizing short-circuit risks and stabilizing the adhesive layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the termination tape area is increased to prevent short-circuits at high temperature, then high-temperature safety performance is improved, but the battery structure complexity increases
Solution Approach 1:
The patent applies parameter changes by establishing specific quantitative relationships between the termination tape area (A), fluoroethylene carbonate content (B2), and positive electrode plate width (C). The ratio A/B2 is controlled in the range of 0.5-5 and A/C in the range of 1-3, optimizing the termination tape dimensions and electrolyte composition to achieve high-temperature safety without excessive structural complexity
Solution Approach 2:
The patent uses composite materials by incorporating fluoroethylene carbonate as an electrolyte additive in the non-aqueous electrolyte solution. This chemical additive works synergistically with the termination tape structure to provide both short-circuit prevention and adhesive layer stabilization at high temperatures, resolving the contradiction through material composition rather than structural complexity
2Reliability
If fluoroethylene carbonate content is increased to stabilize the adhesive layer, then high-temperature safety performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent defines a specific parameter range for fluoroethylene carbonate content (B2 wt%) and establishes its quantitative relationship with termination tape area (A/B2 ratio of 0.5-5). This parameter optimization achieves adhesive layer stabilization while maintaining reasonable manufacturing precision by providing a clear target range for production control
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 improves high-temperature safety performance and reduces the risk of short-circuits, maintaining the integrity of the battery even under extreme conditions.
Implementation Method 1
the electrolyte additive includes fluoroethylene carbonate... a content of fluoroethylene carbonate is B2 wt %... stabilizing the adhesive layer
Implementation Method 2
The non-aqueous electrolyte solution includes a non-aqueous organic solvent, a lithium salt... Transform Chemical Energy to Electrical Energy
Data Source
AI summary
Disclosed is a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. An electrolyte additive includes fluoroethylene carbonate. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, a content of fluoroethylene carbonate is B2 wt %; and a width of the positive electrode plate is C cm; wherein a ratio of A to B2 is in a range of 0.5-5 and a ratio of A to Cis in a range of 1 to 3. The termination tape includes a substrate and a (meth)acrylic acid termination adhesive layer coated on a surface of the substrate. The battery can effectively improve high-temperature performance.