Hybrid Power Supply System for Electric Vehicles
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Solution Overview
Problem
Existing power supply systems for electric vehicles struggle to efficiently manage power distribution between energy storage devices with different power and energy densities, leading to uneven wear and reduced performance.
Innovation Solution
A power supply system comprising a first energy storage device with high energy density and a second energy storage device with high power density, connected through a power transmission circuit that controls power distribution based on demand, ensuring minimal change in output power from the first device and optimal usage of the second device's power capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied from both energy storage devices to meet demand power, then the power supply capacity is improved, but the wear on the high-power density device increases unevenly
Solution Approach 1:
The patent implements dynamic power distribution control where the power transmission circuit adjusts the proportion of power supplied from each energy storage device in real-time based on current demand power levels. The control circuitry continuously monitors and modifies transmission parameters to optimize load distribution, preventing uneven wear while maintaining adequate power supply capacity across varying operational conditions.
Solution Approach 2:
The system changes the transmission parameters of the power transmission circuit based on the current operating state and demand power. By adjusting these parameters dynamically, the system optimizes the power distribution ratio between the two energy storage devices, ensuring that the high-power density device is not excessively worn while meeting the power demand.
2Duration of action of moving object
If the power transmission circuit controls power distribution to reduce wear on the first energy storage device, then the operational duration is improved, but the responsiveness to sudden power demand changes may be reduced
Solution Approach 1:
The power transmission circuit acts as an intermediary between the two energy storage devices and the electric load. It intelligently mediates power distribution by controlling the proportion of power transmitted from each device, allowing the system to balance protective measures for the first device with the need for rapid power response when demand changes suddenly.
Solution Approach 2:
The system dynamically adjusts the power transmission characteristics based on real-time conditions. When sudden power demand changes occur, the control circuitry can rapidly modify the transmission parameters to increase responsiveness, while under normal conditions it maintains protective distribution to extend operational duration.
3Power
If the second energy storage device is used more frequently due to its high power density, then the power delivery capability is improved, but its capacity depletes faster
Solution Approach 1:
The control circuitry continuously monitors the state of charge and power output of the second energy storage device, dynamically adjusting the power transmission parameters to optimize the balance between utilizing its high power delivery capability and preserving its energy capacity for when it is most needed.
Data Source
AI summary
A power supply system includes a first energy storage, a second energy storage, a power transmission circuit, and circuitry. The first energy storage outputs first output power to an electric load. The second energy storage outputs second output power to the electric load. The circuitry is configured to control the power transmission circuit to supply power from the first energy storage or from both of the first energy storage and the second energy storage to the electric load based on a demand power such that a first change in the first output power in accordance with a change in the demand power is lower than a second change in the second output power in accordance with the change in the demand power or a third change in an input power of the second energy storage in accordance with the change in the demand power.