Power Supply System for Electric Vehicles with Dynamic Energy Storage Control
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Solution Overview
Problem
Existing power supply systems for electric vehicles struggle to efficiently manage power between high-energy and high-power storage devices, leading to uneven wear and tear, which affects the longevity and performance of the batteries and capacitors.
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, along with a power transmission circuit and control circuitry that adjusts power transmission to minimize discontinuous changes in input or output, ensuring balanced usage and prolonged device lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power is exchanged between high-capacity battery and high-power capacitor to maintain SOC near center value, then energy distribution efficiency is improved, but discontinuous changes in power transmission occur causing wear and tear on energy storage devices
Solution Approach 1:
The control circuitry dynamically adjusts the target charge/discharge amounts of power for both energy storage devices based on their respective SOC values and upper/lower limit values. This dynamic control ensures continuous and smooth power transmission by calculating appropriate power distribution targets that prevent discontinuous changes, thereby resolving the contradiction between energy distribution efficiency and device reliability
Solution Approach 2:
The system continuously monitors the SOC values of both energy storage devices and uses this feedback to adjust the target charge/discharge amounts in real-time. This feedback mechanism ensures that power transmission remains continuous and optimized, preventing wear and tear while maintaining efficient energy distribution
Data Source
AI summary
A power supply system includes a first energy storage, a second energy storage, a power transmission circuit, and circuitry. The circuitry acquires at least one of a request supply amount and a request output amount. The circuitry calculates a first input or output target amount and a second input or output target amount in accordance with at least one state quantity including the at least one of the request supply amount and the request output amount. The circuitry controls the power transmission circuit to control electric power transmission so that the first input or output target amount and the second input or output target amount are satisfied. The circuitry controls the power transmission circuit so that a change in an amount of the electric power transmission decreases even though changes in the first input or output target amount and the second input or output target amount are discontinuous.