Ultra-Thin Flywheel Battery Layout for Reduced Axial Space
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle-mounted flywheel batteries face challenges with axial space occupation, stability, system loss, and safety due to their conventional designs, which limit their practical application in electric vehicles.
Innovation Solution
A ultra-thin magnetic suspension flywheel battery system is designed with a five-degree-of-freedom magnetic bearing and axial flux motor, utilizing a combination of magnetic bearings with different properties and a foamed aluminum shell to reduce axial space usage, enhance stability, and improve safety through self-balancing and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional flywheel battery topology with inertia spindle is used, then the system structure is simple, but the axial space occupation is large
Solution Approach 1:
The patent removes the inertia spindle from the system, extracting the problematic component that causes axial space occupation. The flywheel is directly suspended by magnetic bearings without requiring a central spindle, thereby eliminating the axial extension caused by the spindle structure while maintaining system functionality.
Solution Approach 2:
The patent embeds the magnetic bearing structure within the flywheel itself, creating a nested configuration where the magnetic bearing is integrated into the flywheel body. This nesting approach allows the magnetic bearing to support the flywheel without requiring additional axial space for a separate spindle structure.
2Device complexity
If single-type magnetic bearing is used, then the device complexity is low, but the stability under complex vehicle conditions is insufficient
Solution Approach 1:
The patent combines multiple types of magnetic bearings (permanent magnet bearing and active magnetic bearing) into a hybrid magnetic bearing system. This merging of different magnetic bearing types allows the system to leverage the advantages of each type, achieving both sufficient bearing capacity and high control precision for maintaining flywheel stability under complex vehicle conditions.
Solution Approach 2:
The patent creates a composite magnetic bearing system that integrates permanent magnet materials and active electromagnetic components. This composite approach combines the passive stability of permanent magnets with the active control capabilities of electromagnetic actuators, resulting in a magnetic bearing system that maintains high stability under varying vehicle conditions.
3Measurement precision
If Lorentz force magnetic bearing is used, then the control precision is high, but the bearing capacity is small and loss is large
Solution Approach 1:
The patent employs the active magnetic bearing (Lorentz force type) selectively and partially, using it only when high precision control is required during complex vehicle operations. During normal operating conditions, the permanent magnet bearing provides sufficient support with minimal energy consumption, and the active magnetic bearing is activated only when additional precision is needed, thereby reducing overall system loss.
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 design achieves high integration, stability, and safety while reducing energy losses, allowing for higher energy storage capacity and efficient energy conversion, facilitating easier vehicle integration and improved safety.
Implementation Method 1
The electromagnetic force of the Lorentz force magnetic bearing is proportional to the current
Implementation Method 2
an axial flux motor, utilizing a combination of magnetic bearings with different properties
Data Source
AI summary
An ultra-thin vehicle-mounted magnetic suspension flywheel battery for an electric vehicle and an operating method thereof are provided. A motor bracket, an axial flux motor, a flywheel, and an inner stator, a coil, and a permanent magnet of a five-degree-of-freedom magnetic bearing are coaxially arranged in a shell from top to bottom. The flywheel consists of an upper layer, a middle layer, and a lower layer which are continuous. An upper annular groove is formed in a middle of a flywheel upper annular layer of the upper layer. The axial flux motor is placed in the upper annular groove. An annular inner groove, a middle-layer annular cavity, and a lower annular groove are communicated with each other and jointly used for placing the inner stator, the coil, and the permanent magnet of the five-degree-of-freedom magnetic bearing.