Nanocomposite Battery Pack Protective Plate for Low-Weight 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 large reserved spaces, limiting vehicle aesthetics, grip force, and comfort due to the use of steel panels.
Innovation Solution
A protection plate composed of a metal substrate and nanoparticle-reinforced polymer composite layers, with specific thickness and tensile strength relationships, providing improved impact, scratch, and ballistic resistance while maintaining a low weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel panel is used for the protection plate, then the strength and impact resistance are improved, but the weight increases and the required space increases
Solution Approach 1:
The patent applies composite materials by combining a polymer base material with nanoparticle reinforcing materials to create a protection plate that achieves high strength and impact resistance without the weight penalty of traditional steel panels. The composite structure allows optimization of both mechanical properties and weight.
Solution Approach 2:
The patent utilizes parameter changes by incorporating nanoparticles with specific size ranges (5-50 nm) and controlling their content (5-30 wt%) to optimize the mechanical properties of the polymer matrix. This allows precise tuning of strength, toughness, and impact resistance while maintaining low weight.
2Strength
If a steel panel is used for the protection plate, then the strength is improved, but the device complexity and space requirements increase
Solution Approach 1:
The composite material structure integrates multiple functions within a single layer, eliminating the need for separate reinforcement layers or complex multi-layer constructions required by steel panels. The nanoparticle-reinforced polymer provides both structural integrity and protective functions in one integrated component.
3Weight of moving object
If the thickness of the protection plate is reduced, then the weight and space are reduced, but the impact resistance and scratch resistance deteriorate
Solution Approach 1:
The patent achieves this breakthrough by changing the material parameters at the nanoscale. The nanoparticle reinforcement (5-50 nm size) with optimized content (5-30 wt%) dramatically enhances the mechanical properties of the polymer, allowing thin plates to achieve the same impact and scratch resistance as much thicker traditional materials.
Solution Approach 2:
The nanoparticle reinforcement provides localized strengthening within the polymer matrix, creating regions of enhanced toughness and resistance precisely where needed. This local quality enhancement allows the overall plate thickness to be reduced while maintaining or improving 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 better impact and scratch resistance with reduced thickness and weight, enhancing vehicle safety and performance without increasing production costs.
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
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Figure 5~7
AI summary
Provided are a protective plate, a battery pack, and an electric device. The protective plate includes a metal substrate and nanoparticle reinforced polymer composite layers that are stacked, and specific parameters of the layers meet a specific mathematical relationship, so that the protective plate can have better anti-collision performance, better scratch resistance, and stronger bullet-proof and explosion-proof performance with a lower weight, and therefore the protective plate has a higher cost-performance ratio and a good application prospect.