Charging Station Battery Pack Control for Vehicle Discharge Support
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Solution Overview
Problem
Charging stations with stationary batteries face high demand periods where the battery capacity is insufficient to meet the needs of multiple vehicles, necessitating a smart charging and discharging scheme to manage demand effectively.
Innovation Solution
A system and method utilizing a battery pack that includes a processor to determine the state-of-charge and communicate discharge requests to vehicles, allowing power exchange between vehicles and the station based on response messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stationary battery is used to charge multiple vehicles during high demand periods, then the charging capacity is improved, but the battery may be drained insufficiently to satisfy all vehicles
Solution Approach 1:
Instead of only charging vehicles from the stationary battery, the system inverts the flow by enabling vehicles to discharge power back to the stationary battery during high demand periods. This bidirectional energy flow allows the battery to be replenished by vehicles rather than only depleted to serve vehicles.
Solution Approach 2:
Vehicles that have excess charge can contribute their own stored energy back to the stationary battery, making the system self-sufficient during high demand periods without requiring external grid connection. The vehicles essentially serve the system themselves by providing charge when needed.
2Productivity
If the stationary battery capacity is increased to meet high demand, then the charging capability is improved, but the device complexity and cost increase
Solution Approach 1:
The stationary battery serves multiple functions: it charges vehicles during low demand periods from the grid, stores energy for high demand periods, and is replenished by vehicles during high demand periods. This multi-functionality allows a single battery of moderate capacity to handle varying demand levels without requiring oversized capacity.
Solution Approach 2:
Vehicles act as intermediaries between the grid and the stationary battery. During high demand, vehicles receive charge from the grid and transfer it to the stationary battery, mediating the energy transfer and allowing the battery to be replenished without direct grid connection during peak periods.
3Adaptability or versatility
If the battery is drained to satisfy high demand, then the service coverage is improved, but the reliability of future charging cycles deteriorates
Solution Approach 1:
The system monitors the state of charge of the stationary battery and uses this feedback to determine when to initiate vehicle-to-battery discharge operations. When the battery charge level drops below a threshold during high demand periods, the system automatically requests discharge from connected vehicles to replenish the battery, ensuring future charging cycles can proceed reliably.
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
Enables efficient power management by allowing vehicles to discharge to the station during high demand, ensuring all vehicles receive the necessary charge without draining the stationary battery.
Implementation Method 1
one or more first battery packs electrically coupled to one or more power sources
Data Source
AI summary
A system is described. The system comprises: one or more first battery packs, a memory; and a processor. The one or more first battery packs are electrically coupled to one or more power sources. The processor is operable to determine whether a first state-of-charge of the one or more first battery packs is less than a threshold level; determine whether one or more first vehicles are electrically coupled to the one or more first battery packs; generate and communicate a first discharge request message to the one or more first vehicles; receive a first response message from the one or more first vehicles; and receive power from the one or more first vehicles based on the first response message.