Dynamic Storage Device Activation for Power Distribution

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Solution Overview

Problem

Existing methods for driving the charging and discharging of electrical energy storage devices in electrical energy distribution networks are inefficient, leading to high electrical losses and accelerated battery aging, especially when the requested total power is low or varying.

Innovation Solution

A method that dynamically adjusts the number of electrical energy storage devices activated and their power contributions based on predefined thresholds and instantaneous state of charge, deactivating devices when power requested per device falls below a certain threshold and activating additional devices when necessary, to minimize simultaneous loading and optimize power distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If all electrical energy storage devices are activated simultaneously to provide equal fractions of requested total power, then the power distribution is simplified and all devices contribute equally, but electrical losses increase and battery aging accelerates when requested total power is low

Engineering Contradiction:
Improvepower distribution simplicityVSAvoidelectrical losses
Core Design Contradiction:
Ease of operationVSLoss of energy

Solution Approach 1:

The patent implements dynamic activation and deactivation of electrical energy storage devices based on real-time monitoring of requested total power and individual device power fractions. When the requested total power varies, the system adjusts which devices remain active, ensuring that no device operates below the minimum power threshold. This dynamic adjustment resolves the contradiction by maintaining operational simplicity while preventing excessive electrical losses and battery aging through intelligent device management.

Inventive Principle:
Principle #15Dynamics

2Stability of the object's composition

If electrical energy storage devices are activated based on state of charge differences to balance charging states, then charge balance is improved, but electrical losses increase and battery aging accelerates due to simultaneous loading

Engineering Contradiction:
Improvestate of charge balanceVSAvoidelectrical losses
Core Design Contradiction:
Stability of the object's compositionVSLoss of energy

Solution Approach 1:

The patent dynamically adjusts device activation based on both state of charge differences and real-time power fraction monitoring. While state of charge balancing is maintained through selective activation, the system simultaneously ensures that each activated device receives a power fraction above the minimum threshold. This resolves the contradiction by balancing charge distribution while preventing excessive electrical losses and battery aging through intelligent power management.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of electrical energy storage devices by introducing a minimum power threshold parameter and dynamically adjusting which devices are activated based on multiple parameters including state of charge and requested total power. This parameter-based control resolves the contradiction by enabling state of charge balancing while preventing devices from operating in inefficient low-power regions that cause excessive losses and aging.

Inventive Principle:
Principle #35Parameter changes

3Loss of energy

If the number of activated electrical energy storage devices is reduced to minimize electrical losses, then energy efficiency is improved, but the system's ability to meet varying power demands is compromised

Engineering Contradiction:
Improveelectrical lossesVSAvoidpower demand responsiveness
Core Design Contradiction:
Loss of energyVSAdaptability or versatility

Solution Approach 1:

The patent implements a dynamic device activation strategy that continuously monitors both the requested total power and the power fraction each device would receive. The system activates or deactivates devices in real-time based on whether the requested power and individual device power fractions meet predefined thresholds. This dynamic approach resolves the contradiction by maintaining adaptability to varying power demands while minimizing electrical losses through optimal device selection.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent employs feedback mechanisms by continuously monitoring the requested total power, calculating individual device power fractions, and using this information to determine optimal device activation. The system receives feedback about power demand variations and adjusts device activation accordingly, ensuring that enough devices remain active to meet power demands while minimizing electrical losses by keeping only necessary devices operational.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS20230208177A1Method For Driving The Charging And Discharging Of A Plurality Of Electrical Energy Storage Device
Publication Date: 2023.06.29 ELECTRICITE DE FRANCE
  • US20230208177A1 patent drawing
  • US20230208177A1 patent drawing
  • US20230208177A1 patent drawing

AI summary

The invention relates to a method for driving the charging and discharging of a plurality of electrical energy storage devices connected to a common connection point (PCC) of an electrical distribution network, as a function of variation of a requested power value (Ptref) at the common connection point, each electrical energy storage device (i) presenting a respective instantaneous state of charge (SOCi), comprising steps of:a—determining a number of electrical energy storage devices needed (Nneeded) to provide the requested power value at a time t,b—activating and/or deactivating one or more of the electrical energy storage devices, as a function of the determined number of electrical energy storage devices needed (Nneeded), and the values of the instantaneous states of charge (SOCi) of each of the electrical energy storage devices (i), andc—distributing the requested power (Ptref) between the activated electrical energy storage devices.