EV Charging Route-Aware Battery Headroom for Regenerative Energy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vehicle charging methods often result in batteries being overcharged, leading to unnecessary energy wastage through resistors, which incur costs and energy loss, as they cannot utilize regenerative braking energy effectively.
Innovation Solution
A method where charging stations determine a predetermined charging level based on the vehicle's weight, altitude, and route topography to stop charging before full capacity, allowing regenerative braking to top up the battery along the route, thereby optimizing battery utilization and minimizing energy disposal through resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery is charged to nominally full capacity at the charging station, then the battery charging completeness is improved, but the regenerative braking energy cannot be utilized and must be discarded through resistors, resulting in energy waste and additional costs
Solution Approach 1:
The charging station determines the predicted battery regeneration amount based on route topography, vehicle weight, and regeneration efficiency before the vehicle departs. The charging event is stopped at a predetermined charging level below full capacity in advance, creating space for the predicted regenerative energy to be stored during the journey, thus preventing energy waste from resistors
Solution Approach 2:
The system uses feedback from route information, vehicle parameters, and regeneration efficiency to dynamically adjust the predetermined charging level. This feedback mechanism ensures the battery is charged to the optimal level that maximizes regenerative energy utilization while maintaining sufficient charge for the journey
2Loss of energy
If the charging event is stopped at a predetermined charging level below full capacity, then the regenerative braking energy can be utilized effectively, but the battery may not be fully charged initially
Solution Approach 1:
The charging station performs preliminary calculation of the predicted battery regeneration based on known route topography, vehicle weight, and regeneration efficiency. This preliminary action determines the precise predetermined charging level that balances initial charge needs with regenerative energy capture potential
Solution Approach 2:
The system changes the charging parameter from fixed full capacity to a dynamic predetermined charging level. This parameter change is based on multiple factors including route altitude changes, vehicle weight, and regeneration efficiency, allowing optimization of both initial charge and regenerative energy utilization
3Reliability
If a resistor is used to consume the produced electricity from regenerative braking, then the battery damage is prevented, but additional costs and energy loss occur
Solution Approach 1:
Instead of discarding regenerative energy as waste heat in resistors, the system converts this potential harm (overcharge risk) into benefit by strategically managing battery charge levels. The predetermined charging level creates a buffer that accommodates regenerative energy, transforming what would be wasted energy into useful stored energy
Solution Approach 2:
The system enables the battery to serve itself by creating an internal energy management mechanism. The predetermined charging level acts as a self-regulating buffer that automatically accommodates regenerative energy without external intervention or energy-wasting resistors, maintaining battery protection while eliminating energy 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
This approach optimizes battery charging by utilizing regenerative energy during travel, reducing the need for external energy disposal and minimizing waste, thus enhancing the efficiency and cost-effectiveness of electric vehicle charging.
Implementation Method 1
The electric vehicle may comprise a regenerative braking system configured to transfer the kinetic energy of the vehicle into stored energy by charging of the battery as the electric vehicle brakes or slows down
Implementation Method 2
The wireless charging system typically includes a charging station having a power emitting coil, or transmission coil, configured to emit electromagnetic radiation
Implementation Method 3
The wireless charging system typically further comprises a power receiving coil, preferably arranged on the electrical vehicle and in electrical communication with the battery, and being configured to receive the emitted electromagnetic radiation for charging the battery
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present invention relates to a method for charging an electric vehicle (1) in a charging station system (100) comprising a plurality of charging stations (200, 201, 202, 203) separated by predetermined routes (300, 301, 302) with known topography. The method comprises: performing (S10) a charging event of a battery (3) of the electric vehicle (1) using an external power source (201A) at a first charging station (201); stopping (S12) the charging event at a predetermined charging level (1000) below the nominally fully charged level (1002), the predetermined charging level (1000) being set to correspond to the predicted battery regeneration when driving the electric vehicle along a predetermined route (301) from the first charging station (201) to a second charging station (202).