Dual Energy Storage Control for Faster EV Battery Recharging
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Solution Overview
Problem
Conventional electric vehicle battery recharging methods require significant time, typically ranging from twenty minutes to six hours, and do not efficiently manage storage of electrical energy between energy storage devices.
Innovation Solution
A system comprising an electromagnetic machine with a rotor and stator, connected to a shaft, and a controller that manages energy flow between two energy storage devices, allowing energy to be transferred from one device to the other to rotate the shaft or charge the devices, optimizing energy distribution and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a battery is recharged by connecting to an alternating current power source, then the battery can be recharged, but the recharging process requires a duration of time ranging from twenty minutes to six hours
Solution Approach 1:
The system divides the energy storage function into two separate energy storage devices: a first energy storage device for long-term energy storage and a second energy storage device for rapid energy transfer. This segmentation allows the second device to be quickly recharged from external sources and then transfer energy to the first device, avoiding the need to recharge the entire system and thereby reducing overall recharging time
Solution Approach 2:
The second energy storage device acts as an intermediary between the external power source and the first energy storage device. It can be quickly charged from external sources and then transfer energy to the first device, serving as a buffer that eliminates the lengthy recharging wait time for the main energy storage system
2Device complexity
If energy is stored in a single energy storage device, then the system is simpler, but the system cannot efficiently manage storage of electrical energy between energy storage devices
Solution Approach 1:
The energy storage system is segmented into a first energy storage device for bulk energy storage and a second energy storage device for rapid charge/discharge operations. This segmentation enables efficient energy management by allowing the controller to optimize energy flow between the two devices based on their respective characteristics, thereby improving overall energy management efficiency
Solution Approach 2:
The second energy storage device serves multiple functions: it can be charged from external power sources, transfer energy to the first energy storage device, and provide power to the electromagnetic machine. This multi-functionality allows a single device to handle various energy management tasks, improving efficiency without proportionally increasing system complexity
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 solution enables efficient management of electrical energy storage, reducing the need for lengthy recharging times and improving the state of charge balance between energy storage devices, enhancing the overall energy utilization and vehicle performance.
Implementation Method 1
The electromagnetic machine can have a rotor and a stator. The rotor can be configured to be connected to a shaft. One of the rotor or the stator can have first windings and second windings.
Data Source
AI summary
A system for managing storage of electrical energy can include an electromagnetic machine and a controller. The electromagnetic machine can have a rotor and a stator. The rotor can be configured to be connected to a shaft. One of the rotor or the stator can have first windings and second windings. The controller can be configured to control first circuitry and second circuitry. The first circuitry can be configured to cause energy to flow from a first energy storage device to the first windings to cause the shaft to rotate. The second circuitry can be configured to cause energy to flow selectively: (1) from a second energy storage device to the second windings to cause the shaft to rotate or (2) from the second windings to the second energy storage device to cause the second energy storage device to be charged.