EV Charging Station Battery Stacks With SOC-Triggered Power Transfer
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Solution Overview
Problem
Current systems for charging and discharging EV charging station batteries are inefficient and cumbersome, leading to energy waste and high costs due to the use of immobile and expensive equipment, as they dissipate electrical energy as heat and require specialized transformers.
Innovation Solution
The system employs a switch mode power supply to charge and discharge EV charging station batteries by transferring electrical power between battery stacks, with a controller determining trigger events based on state of charge thresholds to optimize charging and discharging cycles, and includes a top-off power supply to address energy losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If current systems charge EV charging station batteries by dissipating electrical energy as heat, then the batteries can be discharged, but electrical energy is wasted
Solution Approach 1:
The patent converts the previously harmful energy dissipation process into a beneficial energy transfer process. Instead of dissipating electrical energy as heat during battery discharge, the system now transfers the electrical energy from the discharged battery to charge another battery, thereby converting the waste energy into useful charging energy and eliminating energy loss.
Solution Approach 2:
The system enables batteries to serve each other autonomously. One battery stack charges another battery stack without external intervention, creating a self-sustaining energy exchange system where the discharged battery automatically transfers its energy to recharge the other battery, reducing the need for external charging infrastructure.
2Reliability
If specialized transformers and equipment are used to charge EV charging station batteries, then charging can be accomplished, but equipment cost increases
Solution Approach 1:
The patent replaces expensive specialized transformers with a simpler system that uses existing battery stacks as energy sources. Instead of requiring dedicated charging equipment for each battery, the system copies the energy storage function across multiple battery stacks, allowing them to charge each other using standard electrical connections and control circuitry.
Solution Approach 2:
The battery stacks serve multiple functions: they store energy for charging EVs, they serve as charging sources for other battery stacks, and they can be cycled repeatedly to establish charging profiles. This multi-functionality eliminates the need for separate specialized charging equipment, reducing overall system cost while maintaining reliable charging capability.
3Reliability
If immobile specialized equipment is used for battery charging, then charging can be performed, but system mobility and flexibility are reduced
Solution Approach 1:
The patent transforms the static charging system into a dynamic one where battery stacks can be moved and reconfigured. Instead of fixed charging equipment, the system allows battery stacks to be physically relocated and connected to different positions, enabling flexible deployment and adaptation to various charging station configurations and locations.
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 enhances the efficiency of initial charging and discharging cycles, reduces energy waste, and lowers equipment costs by effectively recycling electrical energy within the system, thereby improving battery performance and extending the life of EV charging station batteries.
Implementation Method 1
providing electrical power from a second battery stack to a switch mode power supply, and providing electrical power from the switch mode power supply to the first battery stack
Data Source
AI summary
The following relates generally to charging and discharging electric vehicle (EV) charging station batteries. In some embodiments, a first battery stack is charged by: (i) providing electrical power from a second battery stack to a switch mode power supply, and (ii) providing electrical power from the switch mode power supply to the first battery stack. A controller may then determine an occurrence of a trigger event associated with a first state of charge (SOC) of the first battery stack or a second SOC of the second battery stack. In response to determining the trigger event occurrence, the second battery stack may be charged by: (i) providing electrical power from the first battery stack to the switch mode power supply, and (ii) providing electrical power from the switch mode power supply to the second battery stack.