EV Charging Control Device for Renewable Energy Storage
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Solution Overview
Problem
Existing quick charging systems for electrical vehicles face challenges in efficiently storing renewable energy and maintaining optimal battery levels, as direct charging from power distribution networks can lead to insufficiency when renewable energy generation is unavailable.
Innovation Solution
A quick charging system comprising a power storage unit, a power supply unit, a power distribution unit, and a control unit that calculates expected power storage levels based on renewable energy generation and power supply transitions, setting power reduction or supply time zones to manage electrical power distribution and prevent insufficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the supply of electrical power from the power distribution network is controlled such that the amount of the stored electrical power of the storage battery is always 100%, then the battery power insufficiency is suppressed, but a timing at which the storage battery cannot be charged with electrical power generated using renewable energy may occur
Solution Approach 1:
The control device performs preliminary calculations to predict future battery charge levels based on expected renewable energy generation and power supply patterns. By anticipating future states rather than reacting to current conditions, the system proactively identifies optimal charging windows before they pass, ensuring both battery reliability and maximum renewable energy utilization.
Solution Approach 2:
The system dynamically adjusts the charging control strategy based on real-time conditions and predictions. The control device continuously recalculates the power reduction time zone as new information about renewable energy generation and power supply becomes available, making the system adaptive rather than static. This dynamic approach allows the system to optimize between reliability and renewable energy storage under varying conditions.
2Speed
If electrical power is supplied directly from the power distribution network to charge the battery, then the charging speed is fast, but the amount of electrical power per unit time becomes too large causing load issues
Solution Approach 1:
The charging process is segmented into multiple phases: renewable energy charging when available, and controlled power distribution network charging when needed. The control device divides the charging timeline into segments, utilizing different power sources at different times. This segmentation allows fast charging to be achieved through coordinated use of both sources while limiting the peak load from the power distribution network.
Solution Approach 2:
The storage battery acts as an intermediary between the power distribution network and the apparatus battery. Instead of direct charging that would create large instantaneous loads, the storage battery buffers and regulates power flow, converting the large power supply into manageable charging rates while still achieving fast overall charging through optimized power transfer.
3Quantity of substance
If the storage battery capacity is increased to store more renewable energy, then the renewable energy storage capability is improved, but the device complexity and cost increase
Solution Approach 1:
The system optimizes the utilization parameters of the existing storage battery rather than increasing its physical capacity. By changing operational parameters such as charge/discharge rates, state of charge thresholds, and timing strategies, the system maximizes the effective storage capability of the existing battery, achieving high renewable energy storage without adding hardware complexity.
Data Source
AI summary
A control device (200) calculates, on the basis of the transition of the expected amount of power generation of a power generation unit (160), the transition of the expected amount of power supply of a power supply unit (110), and the current amount of stored electrical power of a storage battery (120), a transition of the expected amount of the stored electrical power of the storage battery (120) in a case where electrical power continues to be supplied from a power distribution network (300) to the storage battery (120). In addition, the control device (200) sets a power reduction time zone, which is a time zone in which no electrical power is supplied from the power distribution network (300) to the storage battery (120), when the presence of a first time, which is a time when the expected amount of the stored electrical power starts to exceed the first reference capacity, is shown in the transition of the expected amount of the stored electrical power of the storage battery (120), and sets the end time of the power reduction time zone as the first time.