Multiport Energy Management System for Balanced EV Charging
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Solution Overview
Problem
The existing charging systems for electric vehicles (EVs) are inefficient as they require separate charging systems for different energy storage devices, leading to prolonged recharge times due to unequal state-of-charge (SOC) levels and varying storage capacities, making it time-consuming to charge multiple devices simultaneously.
Innovation Solution
A multiport energy management system (ESMS) with a power electronic conversion system and a controller that determines the power split factor based on the SOC of each energy storage device, allowing for simultaneous and balanced charging across multiple ports, utilizing DC electrical converters to step up or step down voltage and regulate power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate charging systems are used for different energy storage devices, then each device can be charged with dedicated charging circuitry, but the overall recharge time increases and system complexity increases
Solution Approach 1:
The patent combines multiple separate charging systems into a single integrated charging system that can simultaneously charge multiple energy storage devices (batteries and ultracapacitors) with different voltage levels. The integrated system includes a controller that manages power distribution to multiple ports, eliminating the need for separate charging circuits for each device and reducing overall recharge time.
Solution Approach 2:
The charging system is designed with multi-functionality to handle different types of energy storage devices with varying voltage requirements. The system includes multiple charging ports (e.g., 12V port, 48V port) that can simultaneously serve different battery and ultracapacitor configurations, making a single charging system universal for various device combinations.
2Adaptability or versatility
If separate charging systems are used for different energy storage devices, then each device can be charged independently, but the device complexity and number of components increase
Solution Approach 1:
The patent merges multiple independent charging systems into one integrated charging unit that manages multiple energy storage devices. Instead of having separate charging circuits for batteries and ultracapacitors, the integrated system uses a single controller with multiple output ports to manage all charging operations, reducing component count while maintaining adaptability.
Solution Approach 2:
The controller acts as an intermediary between the power source and multiple energy storage devices. It manages power distribution, voltage conversion, and charging parameters for different devices through a centralized control architecture, eliminating the need for multiple independent control systems and reducing overall system complexity.
3Ease of operation
If multiple energy storage devices are charged simultaneously with equal power distribution, then charging is simplified, but devices with different SOC levels and capacities cannot be efficiently charged
Solution Approach 1:
The charging system dynamically adjusts power distribution to each energy storage device based on real-time conditions. The controller monitors SOC levels, voltage requirements, and capacity of each device (batteries and ultracapacitors) and automatically modulates power allocation through multiple ports, enabling efficient simultaneous charging without manual intervention.
Solution Approach 2:
The system incorporates feedback mechanisms where the controller continuously monitors the state of each energy storage device and adjusts charging parameters accordingly. This feedback loop ensures that devices with different SOC levels and capacities receive appropriate power distribution, optimizing charging efficiency while maintaining operational simplicity.
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 significantly reduces the overall recharge time for multiple energy storage devices in EVs by optimizing power distribution based on the SOC of each device, ensuring efficient and balanced charging, even when devices have different voltage levels and capacities.
Implementation Method 1
a power electronic conversion system comprising a plurality of DC electrical converters, each DC electrical converter configured to step up and to step down a DC voltage
Data Source
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AI summary
An energy storage and management system (ESMS) (100) includes energy storage devices (116, 124, 128) coupled to a power device (126), a power electronic conversion system that includes a plurality of DC electrical converters (104, 106, 108), each DC electrical converter (104, 106, 108) configured to step up and to step down a DC voltage, wherein energy ports (102) of the ESMS (100) are coupleable to each of the energy storage devices (116, 124, 128), and each of the energy ports (102) is coupleable to an electrical charging system (126). The ESMS (100) includes a controller (46) configured to determine a first condition of a first energy storage device (116) and a second condition of a second energy storage device (124) (414), wherein the first and second energy storage devices (116, 124) are each connected to respective energy ports (114, 120) of the power conversion system, determine a power split factor based on the first condition and on the second condition (416), and regulate power to the first and second energy storage devices based on the power split factor (418).