Nanocomposite Battery Pack Protective Plate for Impact Resistance
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Solution Overview
Problem
Existing battery pack protection plates in new energy electric vehicles are heavy, have poor impact resistance, and require a large reserved space, limiting design height and aesthetic appeal.
Innovation Solution
A protection plate composed of stacked composite layers with polymer base materials reinforced by nanoparticles, a metal substrate, and optional anti-corrosion and buffer layers, optimized by specific thickness and tensile strength relationships to enhance impact resistance and reduce weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel panel is used as the protection plate, then the protective function is provided, but the weight increases and impact resistance deteriorates
Solution Approach 1:
The patent uses a composite structure consisting of a polymer base material layer and a metal substrate layer. The polymer layer (such as polyurea or polyurethane) provides lightweight protection while the metal substrate (such as aluminum alloy or steel) provides structural support. This composite design achieves high impact resistance without the excessive weight of a solid steel panel, directly resolving the contradiction between strength and weight.
Solution Approach 2:
The patent optimizes the thickness parameters of each layer to achieve the desired protective performance. By controlling the thickness of the polymer layer (d1) and metal substrate (d3) within specific ranges, and ensuring they meet the formula d1²σ1 + d3σ3 ≥ 1000, the design achieves high impact resistance with minimized weight, resolving the contradiction between protective strength and weight.
2Strength
If a thick protection plate is used to improve impact resistance, then the protective function is enhanced, but the design height is limited and aesthetic degree deteriorates
Solution Approach 1:
The composite structure allows for a thinner overall plate design compared to solid steel while maintaining or improving impact resistance. The polymer layer absorbs impact energy through deformation, while the thin metal substrate provides structural support, enabling a reduced total thickness that preserves design height and aesthetic appearance.
Solution Approach 2:
By optimizing the thickness parameters d1 and d3 to meet the formula d1²σ1 + d3σ3 ≥ 1000, the patent achieves high impact resistance with a minimized total thickness (d1 + d3 ≤ 10.0 mm). This parameter optimization resolves the contradiction between impact resistance and design height by providing the minimum necessary thickness for protection while maximizing design freedom.
3Weight of moving object
If a polymer composite structure is used to reduce weight, then the weight decreases and design flexibility improves, but impact resistance may deteriorate
Solution Approach 1:
The patent combines polymer base materials (providing lightweight and energy-absorbing properties) with metal substrates (providing high strength and rigidity). This composite structure achieves both weight reduction and high impact resistance, as the polymer layer absorbs impact energy while the metal substrate maintains structural integrity, preventing the deterioration of impact resistance despite the use of lightweight materials.
Solution Approach 2:
The patent establishes the formula d1²σ1 + d3σ3 ≥ 1000 to ensure that the combined protective capability of the polymer layer and metal substrate meets the required impact resistance level. By controlling the thickness and tensile strength parameters within specific ranges, the design achieves optimal balance between weight reduction and impact resistance, preventing deterioration of protective performance.
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 protection plate achieves improved impact resistance, scratch resistance, and reduced weight while maintaining strong ballistic and blast resistance, enhancing vehicle safety and design flexibility.
Implementation Method 1
The first composite layer and the second composite layer each include a polymer base material and a reinforcing material; the reinforcing material includes nanoparticles
Data Source
AI summary
A protective plate includes a first composite layer having a thickness of d1 in mm, a metal substrate, and a second composite layer having a thickness of d2 in mm that are sequentially stacked, where d1>0, and d2≥0. The first composite layer and the second composite layer each includes a polymer base material and a reinforcing material, the reinforcing material includes nanoparticles, the first composite layer has a tensile strength of σ1 in MPa, the second composite layer has a tensile strength of σ2 in MPa, the metal substrate has a thickness of d3 in mm and a tensile strength of σ3 in MPa, and the protection plate meets a formula:d3(d1+d2)+d3×σ3(σ1+σ1)+σ3>0.032.