Wheel Motor Reverse Charging and Damping for EV Range Extension
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Solution Overview
Problem
Electric vehicles face limitations due to battery charging time, limited charging station availability, and performance issues such as reduced torque and acceleration, as well as shock-induced coil sensing disruptions affecting magnetic fields and electromagnetic induction.
Innovation Solution
A range-extending, charging, and driving apparatus for electric vehicles incorporating a wheel motor connected to a planetary gear assembly and a damping component, which allows for reverse power generation to charge the main battery and includes a fuel cell for extended operation, and a damping system to mitigate shock impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a pure battery-powered electric vehicle uses the wheel motor to drive the planetary gear assembly, then the vehicle can achieve normal driving function, but the wheel motor cannot generate electric power to charge the main battery when the vehicle is stationary or coasting
Solution Approach 1:
The patent enables the wheel motor to operate in reverse mode, transforming from a pure motor function to a dual-function device that can both drive the wheels and generate electric power. When the vehicle coasts or the driver releases the accelerator, the planetary gear assembly reverses the power flow, causing the wheel motor to function as a generator and charge the main battery, thus achieving energy recovery without adding separate regenerative braking components
Solution Approach 2:
The wheel motor is designed to perform multiple functions: it can operate as a motor to drive the planetary gear assembly during acceleration, and as a generator to charge the main battery during coasting or braking. This multi-functionality eliminates the need for separate motor and generator components, reducing system complexity while enabling energy recovery
2Reliability
If the wheel motor directly drives the wheel set without a damping component, then the structure is simpler, but shocks from the wheel set directly affect the wheel motor and planetary gear assembly, degrading performance
Solution Approach 1:
The damping component is introduced as an intermediary element between the wheel set and the wheel motor. This component absorbs and dampens shocks from the road, preventing them from directly transmitting to the wheel motor and planetary gear assembly. By placing this intermediary damping element in the power transmission path, the patent protects the sensitive motor components from mechanical shocks without requiring a complete suspension system redesign
Solution Approach 2:
The damping component provides beforehand cushioning by absorbing shocks before they reach the wheel motor and planetary gear assembly. This preventive measure protects the motor components from damage and performance degradation caused by road irregularities, ensuring stable operation under varying road conditions
3Duration of action of moving object
If the electric vehicle relies solely on the main battery for power, then the system is simpler, but the cruising range is limited and charging frequency increases
Solution Approach 1:
The patent changes the operational parameters of the wheel motor, enabling it to function in both motor and generator modes. By adjusting the control strategy to allow reverse power flow, the system can recover energy during coasting and braking events, effectively extending the cruising range without requiring a larger battery or additional fuel tank
4Power
If the wheel motor operates at high speed for enhanced performance, then torque and acceleration improve, but energy consumption increases and charging frequency increases
Solution Approach 1:
The patent implements a feedback mechanism where the control unit monitors the rotational speed and power output of the wheel motor. When the vehicle is coasting or the driver releases the accelerator, the control unit detects the reduction in power demand and automatically switches the wheel motor to generator mode, feeding energy back to the main battery. This feedback-based control optimizes energy usage by recovering energy that would otherwise be wasted during deceleration
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 apparatus extends the cruising range, enhances torque and speed, reduces charging frequency, and improves user experience by providing a more efficient and convenient charging solution while minimizing the impact of wheel shocks on motor performance.
Implementation Method 1
The wheel motor is further connected to a main battery for charging the main battery when the wheel motor generates electric power reversely
Implementation Method 2
The damping component is connected between the wheel set and the wheel motor for absorbing shocks of the wheel motor or the wheel set
Implementation Method 3
The apparatus further comprises a fuel cell coupled to the main battery and utilized for charging the main battery
Data Source
AI summary
A range-extending, charging, and driving apparatus for an electric vehicle includes a wheel motor and a damping component. The wheel motor is connected to a wheel set of the electric vehicle for driving the wheel set. The wheel motor is further connected to a main battery for charging the main battery when the wheel motor generates electric power reversely. The damping component is connected between the wheel set and the wheel motor for absorbing shocks of the wheel motor or the wheel set.