Switchable Magnetic Battery Mounting for Electric Vehicles
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Solution Overview
Problem
Existing electric vehicle battery mounting systems are cumbersome and unsafe, requiring multiple bolts for installation and removal, which complicates quick detachment during emergencies.
Innovation Solution
A magnetic force device using Nd2-Fe-14B permanent magnets, switchable between magnetic and non-magnetic states, is integrated to securely attach and easily detach the battery pack without bolts, utilizing an electric motor to control magnetism and a positioning system to prevent misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple bolts are used to mount the battery, then the battery can be securely fixed to the vehicle, but the mounting and detaching process becomes cumbersome and time-consuming
Solution Approach 1:
The patent replaces the traditional mechanical bolt-based fastening system with a magnetic force device. The magnetic device includes magnets that generate magnetic attraction force to hold the battery pack securely during normal operation, and can be deactivated to release the battery quickly when needed. This substitution eliminates the need for multiple bolts while maintaining both secure fixation and ease of operation.
2Strength
If multiple bolts are used to secure the battery, then the battery remains firmly mounted during operation, but rapid detachment in emergency situations becomes difficult
Solution Approach 1:
The patent employs a dynamic magnetic force device that can switch between two states: a magnetic state where the magnets are active and provide strong holding force to secure the battery pack firmly during normal vehicle operation, and a non-magnetic state where the magnets are deactivated allowing for rapid detachment in emergency situations. This dynamic switching capability resolves the contradiction between maintaining strong mounting strength and enabling fast detachment.
3Reliability
If traditional bolt mounting is used, then the battery can be securely attached, but the vehicle weight increases due to additional mounting hardware
Solution Approach 1:
The patent replaces the heavy mechanical bolt and mounting bracket system with a lighter magnetic force device. The magnetic assembly consists of magnets, a non-magnetizer, and control mechanisms that collectively weigh less than the equivalent bolt-based fastening system while providing comparable or superior attachment reliability through magnetic attraction force.
4Ease of operation
If magnets are used for mounting, then the battery pack can be easily attached and detached, but the magnetic force must be strong enough to secure the battery during vehicle operation
Solution Approach 1:
The patent utilizes parameter changes in the magnetic system, specifically the ability to switch the magnetic field strength between two states. The magnetic force device is designed to generate sufficient magnetic attraction force to securely hold the battery pack during normal vehicle operation, and can be deactivated to reduce the magnetic force to zero for easy detachment. The system parameters (magnetic field strength) are dynamically adjusted to meet different operational requirements.
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
Enables rapid and convenient battery pack installation and removal, enhancing safety by eliminating the need for bolts and reducing vehicle weight while ensuring secure attachment.
Implementation Method 1
a magnetic force device, which is switchable between a magnetic state and a non-magnetic state and is able to attract a magnetic object in the magnetic state
Implementation Method 2
utilizing an electric motor to control magnetism
Data Source
Figure 1~3
AI summary
Disclosed are a vehicle body component, a battery pack, and a vehicle having a battery mounted therein. The vehicle having a battery mounted therein comprises a magnetic force device (20). In one state, the magnetic force device has magnetism and can attract a magnetic object; and in the other state, the magnetic force device has no magnetism, and a mounting and positioning device is disposed between the magnetic force device (20) and the magnetic object. A device for quick swap of a vehicle battery alleviates the problem of being not easy to mount and detach a battery in the prior art, so that the battery can be more conveniently and rapidly mounted and detached. When the battery has a fault, it can be quickly detached, thereby protecting the vehicle and a person therein against danger.