EP4062252A1 - An energy storage system and a controller for an energy storage system - Google Patents

An energy storage system and a controller for an energy storage system

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Publication number
EP4062252A1
EP4062252A1 EP20864269.4A EP20864269A EP4062252A1 EP 4062252 A1 EP4062252 A1 EP 4062252A1 EP 20864269 A EP20864269 A EP 20864269A EP 4062252 A1 EP4062252 A1 EP 4062252A1
Authority
EP
European Patent Office
Prior art keywords
energy
supply
energy storage
drawl
storage system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20864269.4A
Other languages
German (de)
French (fr)
Inventor
Sandro IACOVELLA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4062252A1 publication Critical patent/EP4062252A1/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/0205—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system
    • G05B13/026—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system using a predictor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/082—Hot water storage tanks specially adapted therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/144—Measuring or calculating energy consumption
    • F24H15/152—Forecasting future energy consumption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/156—Reducing the quantity of energy consumed; Increasing efficiency
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/176—Improving or maintaining comfort of users
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1917—Control of temperature characterised by the use of electric means using digital means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G05D23/2401—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor using a heating element as a sensing element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Software Systems (AREA)
  • Medical Informatics (AREA)
  • Evolutionary Computation (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Artificial Intelligence (AREA)
  • Control Of Temperature (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

A energy storage system comprises a controller for controlling the energy level of the energy storage. An estimator compares an energy supply pattern as controlled by the controller in a disturbed state to the energy supply pattern in an undisturbed state and thus extracts information regarding the time and amout of drawl of energy by a user. This information can then be used to predict future drawls and pre charge the energy storage such that comfort and safety of the user are ensured while the energy storage is outside these periods kept at a lowe backup temperature to reduce energy losses.

Description

An energy storage system and a controller for an energy storage system.
Field of the invention
The invention relates to an an energy storage system comprising:
- an energy storage having energy losses
- an energy supply arranged for supplying input energy to the energy storage
- an energy output arranged for drawing energy from the energy storage
- an controller arranged to maintain a stored quantity of energy in the energy storage between a first limit and a second limit, the first limit being lower than the second limit, by supplying an energy supply from the energy input to the energy storage during an energy supply period
Background of the invention
Such energy storage systems are very common in households. A boiler or heatpump is used to store energy in the form of hot water. Often the energy input for the boiler comes in the form of electric energy, although for the invention other forms of energy can be used, such as gas or heat derived from a heat pump. Similarly, an electric storage space heater stores energy in clay bricks, ceramic materials or concrete walls. To keep these systems simple and reliable a thermostat is used to control the amount of energy stored in the energy storage. The thermostat is effectively a binary switch with most of the time a hysteresis built in to prevent the switch from operating frequently. Although very reliable, such a simple thermostat has the disadvantage that it can only react to changes in the amount of stored energy by operating the switch if one of the thresholds is reached (i.e. de-energizing the switch when the upper threshold is reached and energizing the switch below the lower threshold).
As the energy storage is used for longer term storage of energy such instant reaction is not needed and the input of energy into the storage does not need to be linked to the extraction of energy from the energy storage. However, one condition for disconnecting the moment at which supply energy is supplied to the energy storage from the moment energy is drawn from the energy storage is that the energy storage always holds enough energy to supply the extracted energy during normal operation.
To achieve this objective the known energy storage system comprises a controller that measures the amount of stored energy using a sensor. From this sensor an energy extraction pattern can be identified. This energy extraction pattern is then used to supply energy to the energy storage at a more cost-effictive moment (the same moment in a day or earlier to allow for demand response services or tariff arbitrage) in the future predicted from past identified energy extraction patterns.
Summary of the invention
In order to overcome this problem the energy storage system is characterized in that that the controller is farther arranged to estimate a user drawl of energy by identifying energy supply pattern differences between an energysupply pattern in a disturbed state where energy is drawn from the energy storage system and an energy input pattern in an undisturbed state where no energy is drawn from the energy storage system, the pattern difference representing the user drawl of energy from the energy storage and in that the controller is further arranged to use the pattern difference to predict future user energy drawls and to supply supply energy to the energy storage system ahead of the predicted future user drawl of energy such that the stored quantity of energy remains above the first limit.
In an embodiment the controller is arranged to supply energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before the predicted future user drawl of energy. Ensuring that the input energy application occurs within a predetermined time window before the predicted future user extraction of energy results in minimization of the energy losses and/or tariff arbitrage opportunities, as the energy storage system is at a lower energy state for a longer period of time, thus ensuring the least amount of losses. In another embodiment the controller is arranged to supply an input energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before an end of the predicted future user drawl of energy.
This measure shifts the energy input into the energy storage system even further towards the end of the predicted user extraction of energy, thus further minimizing energy losses and thus improving the energy efficiency of the energy storage system.
A controller is characterized in that the controller is further arranged to estimate a user drawl of energy by identifying energy supply pattern differences between an energysupply pattern in a disturbed state where energy is drawn from the energy storage system and an energy input pattern in an undisturbed state where no energy is drawn from the energy storage system, the pattern difference representing the user drawl of energy from the energy storage and in that the controller is further arranged to use the pattern difference to predict future user energy drawls and to supply supply energy to the energy storage system ahead of the predicted future user drawl of energy such that the stored quantity of energy remains above the first limit.
In an embodiment of the controller the controller is arranged to to supply energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before the predicted future user drawl of energy. Ensuring that the input energy application occurs within a predetermined time window before the predicted future user extraction of energy results in minimization of the energy losses as the energy storage system is at a lower energy state for a longer period of time, thus ensuring the least amount of losses.
In a further embodiment the controller is arranged to apply an input energy corresponding to the pattern difference to the energy input such that an end of the input energy application occurs within a predetermined time window before an end of the predicted future user extraction of energy. This measure shifts the energy input into the energy storage system even further towards the end of the predicted user extraction of energy, thus further minimizing energy losses and thus improving the energy efficiency of the energy storage system.
A method according to the invention is characterized in that the method further comprises the steps of
- estimating a user drawl of energy by identifying energy supply pattern differences between an energy supply pattern in a disturbed state where energy is drawn from the energy storage system and an energy supply pattern in an undisturbed state where no energy is drawn from the energy storage, the pattern difference representing the user drawl of energy from the energy storage system and in that the controller is further arranged to use the pattern difference to predict future user energy drawls and to supply the energy supply to the energy storage system ahead of the predicted future user drawl of energy such that the stored quantity of energy remains above the first limit.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows an energy storage system according to the invention.
Figure 2 shows the operation of the energy storage system in an undisturbed state. Figure 3 shows the operation in a disturbed state when the user extracts energy Figure 4 shows a future predicted extraction of energy and the shifted input of energy ahead of the user extraction of energy.
DETAILED DESCRIPTION OF EMBODIMENTS
The energy storage system 10 comprises an energy storage 11 having energy losses (Eloss) and an energy input 14 for supplying input energy ( Em ) to the energy storage 11. The energy storage system 10 further comprises an energy output 17 for extracting output energy 18 (is^from the energy storage 11 and a controller 13 arranged to maintain a stored quantity of energy in the energy storage 11 between a first limit and a second limit, where the first limit is lower than the second limit, by supplying energy from the energy input 14 to the energy storage 11 during an energy supply period.
The energy storing system 10 comprises a second controller 19 arranged to estimate a user extraction of energy by identifying pattern differences between an energy input pattern in a disturbed state with energy output from the energy storage 11 and an energy input pattern in an undisturbed state without energy output from the energy storage 11, the difference representing the user extraction of energy from the energy storage 11 .The functionality of the second controller 19 can be integrated into the controller 13 or can be separate in a retrofit situation where the functionality is added to an existing system.
Figure 2 shows three graphs that each will discussed separately.
Figure 2 is meant to provide an overview of three operating modes so that differences can be more easily understood.
Figure 2 shows the operation of the energy storage system in an undisturbed state.
It shows energy consumption pattern for an energy storing system as described in figure 1 , in undisturbed operation, i.e. where only energy losses exist . This figure is the reference and reflects the undisturbed state as existing in a prior art systems. Basically such an energy storage system is equipped with a mechanical or digital thermostat controller in order to maintain the temperature at a certain temperature iet . In order to reduce wear and tear of the switching system, a certain deadband db temperature is applied, resulting in a oscillating temperature control behavior between the threshold F + f'11 and the threshold f - fb/1 . When the temperature 20 of the energy storage element is lower or equal to the temperature setpoint fet - tdb/2 , the energy storage system increases the energy storage level at its rated power consumption Prated by providing an energy supply to the energy storage, for instance using a heating element, until a temperature of Fbl2 is reached. In undisturbed operation, this results in steady-state energy supply on segments 21a, 21c and energy supply off segments 21b, 21 d with duration of fn and toff respectively. When energy is supplied to the energy storage in an energy supply on segment 21a the temperature 20a of the medium in the energy storage will increase. Likewise, during an energy supply off segment 21b the temperature 20b will fall due to losses of energy to the environment. As can be seen this is a regular energy supply pattern where the energy supply on segments 21a, 21c have similar durations, and energy supply off 21b, 21 d segments also have similar durations. The system and in particular the controller according to the invention recognize this pattern and can derive timing and amount of energy drawls by the user from the deviation of an energy supply pattern from the energy supply pattern in the undisturbed state as will be explained in the following figures
Figure 4 shows the operation in a disturbed state when the user extracts energy In case of an energy drawl by the user, it can be seen that the amount of energy extracted is a combination of the energy drawl Edrawl by the user and the natural energy losses Eloss to the environment. This extraction at increased rate results in a reduced off time fff' 21 g. In this case shown the lower temperature fet - tdb!l is reached during half of the original off time of the undisturbed state. Due to the larger depletion of the energy storage system, a larger on time fn to reach the desired temperature fet + *12 will be applied by the controller.
An estimator is arranged to, from the energy supply pattern in any of the aforementioned states to differentiate drawls (extractions by the user) from losses to the environment by comparing an energy supply pattern at hand as shown in figure 3 with the energy supply pattern of the undisturbed state as shown in figure 2. For this figure 2 gives a good side by side view of the energy supply pattern in the undisturbed state (top graph of figure 2) and the energy supply pattern in the disturbed state (middle graph of figure 2) First, considering operation in the disturbed state, figure 4 depicts the energy segment with an extended energy supply duration 21 e that is, as explained above in part due to the useful energy drawl Edrawland in part due to the always occurring energy losses Eloss. This segment can be identified due to its significantly distinct duration compared to the energy supply duration ton as occur during he undisturbed state. It can also be observed that from the total segment with duration fn , only part of the identified energy supply segment with duration ton" is identified as being due to drawl by the user from the energy storage. Due to the decreased radiation losses at the lower energy storage temperature happening because of the drawl, the following simplified formula solely based on power consumption timings is employed to discern that part of the energy supply segment 21 e:
In the example depicted in figure 4, the lower temperature threshold f - tdbl '2 is surpassed in half of the time of the undisturbed duration , meaning that half the radiation duration of the undisturbed fn is subtracted from the total energy supply segment 21 e with extended duration in order to derive that part of the extended energy supply segment 21 e that is due to the drawl and not due to the loss of energy to the environment.
Figure 5 shows a future predicted extraction of energy and the shifted supply of energy of energy ahead of the user extraction of energy.
In this embodiment, the controller is arranged to operate the energy storage system in a more energy efficient manner, while still energy drawls to the user. The estimator previously identified a time of energy drawl as described above for figure 4 and is thus able to predict, having this history of typical times at which drawls occur, future moments of energy drawl. This prediction is supplied to the controller and allows the controller to maintain a reduced energy storage state-of-charge at tbackup ± tdb which is lower than f - 11 when no disturbances are predicted. When an energy drawl 21 h is predicted the controller is arranged to supply an energy supply to the energy storage by providing an energy supply 21 g to the energy storage ahead of the predicted time / expected drawl 21 h and in this way maintain the energy in the energy storage above fet- fb/1 during the predicted drawl ensuring comfort and safety for the user. As this allows the energy level/ temperature of the energy storage to be maintained at a lower level 20f outside the energy supply period 21 g and drawl period 21 h energy losses by radiation to the environment are reduced. When an additional temperature probe is utilized for maintaining the backup temperature, the energy state of the energy storage system is maintained by a backup hysteresis controller at fackup ± fb together with a controller supplying the predicted extraction energy. This latter energy is supplied in addition to a controller performing the temperature backup hysteresis control. This backup controller allows to account for the energy radiation losses at lower temperature, as well as maintaining end-user comfort in case of small or unpredicted energy extractions. In order to handle erroneously predicted large energy drawls resulting in too high a temperature in the energy storage, a subsequently predicted and to-be-applied extraction energy is scaled down based on the time difference with the previously incorrectly predicted energy supply pattern, accounting for the incurred energy radiation losses as described by fn and .
In a further embodiment where no temperature probe is utilized for maintaining the backup temperature Tbackup, the energy level / temperature of the energy storage system is maintained solely by the controller base don predicted energy drawls. Uncompensated disturbed energy sequences with duration fn' (and not ton ') are applied to the energy storage system. In case of perfect predictions, all energy extractions can be satisfied comfort-wise. This regulator can diverge over time due to unpredicted energy extractions and should therefore be recalibrated by occasionally steering the energy storage system to its highest or lowest energy state, reestablishing a baseline in that way. This is possible as the thermal characteristics of the system are known. For instance the system could be allowed to completely cool down and then be heated back up for a predetermined time as it is known that from cold the energy storage will reach the desired temperature. The controller from that moment onward can maintain the energy level/temperature as described.

Claims

Claims
1 An energy storage system comprising:
- an energy storage having energy losses ( Eloss)
- an energy supply arranged for supplying input energy to the energy storage ( Ew )
- an energy output arranged for drawing energy from the energy storage ( Eout )
- an controller arranged to maintain a stored quantity of energy in the energy storage between a first limit and a second limit, the first limit being lower than the second limit, by supplying an energy supply from the energy input to the energy storage during an energy supply period characterized in that the controller is further arranged to estimate a user drawl of energy by identifying energy supply pattern differences between an energysupply pattern in a disturbed state where energy is drawn from the energy storage system and an energy input pattern in an undisturbed state where no energy is drawn from the energy storage system, the pattern difference representing the user drawl of energy from the energy storage and in that the controller is further arranged to use the pattern difference to predict future user energy drawls and to supply supply energy to the energy storage system ahead of the predicted future user drawl of energy such that the stored quantity of energy remains above the first limit.
2 An energy storage system as claimed in claim 1 , where the controller is arranged to supply energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before the predicted future user drawl of energy.
3 An energy storage system as claimed in claim 1 , where the controller is arranged to supply an input energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before an end of the predicted future user drawl of energy.
4 A controller for controlling an amount of energy in an energy storage system comprising: - an energy storage having energy losses ( Eloss )
- an energy input for supplying input energy to the energy storage ( Em )
- an energy output for extracting output energy from the energy storage ( Eout )
- the controller being arranged to maintain a stored quantity of energy in the energy storage between a first limit and a second limit, the first limit being lower than the second limit, by supplying an energy supply from the energy input to the energy storage during an energy supply period characterized in that the controller is further arranged to estimate a user drawl of energy by identifying energy supply pattern differences between an energysupply pattern in a disturbed state where energy is drawn from the energy storage system and an energy input pattern in an undisturbed state where no energy is drawn from the energy storage system, the pattern difference representing the user drawl of energy from the energy storage and in that the controller is further arranged to use the pattern difference to predict future user energy drawls and to supply supply energy to the energy storage system ahead of the predicted future user drawl of energy such that the stored quantity of energy remains above the first limit.
5 A controller as claimed in claim 4, where the controller is arranged to supply energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before the predicted future user drawl of energy.
6 An energy storage system as claimed in claim 4, where the controller is arranged to supply an input energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before an end of the predicted future user drawl of energy.
7 A method for operating an energy storage system, the energy storage system having having energy losses (Eloss) and energy drawls from the energy storage, The method comprising the steps of:
- maintaining a stored quantity of energy in the energy storage between a first limit and a second limit, the first limit being lower than the second limit, by supplying input energy supply to the energy storage during an energy supply period characterized in that the method further comprises the steps of
- estimating a user drawl of energy by identifying energy supply pattern differences between an energy supply pattern in a disturbed state where energy is drawn from the energy storage system and an energy supply pattern in an undisturbed state where no energy is drawn from the energy storage, the pattern difference representing the user drawl of energy from the energy storage system and in that the controller is further arranged to use the pattern difference to predict future user energy drawls and to supply the energy supply to the energy storage system ahead of the predicted future user drawl of energy such that the stored quantity of energy remains above the first limit.
8 A method as claimed in claim 7, where the method comprises the step of supplying energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before the predicted future user drawl of energy.
9 A method as claimed in claim 7, where the method comprises the step of supplying an input energy corresponding to the pattern difference to the energy storage such that an end of the supply of supply energy occurs within a predetermined time window before an end of the predicted future user drawl of energy.
EP20864269.4A 2019-11-20 2020-11-20 An energy storage system and a controller for an energy storage system Withdrawn EP4062252A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP19000530 2019-11-20
EP19000526 2019-11-20
EP19000525 2019-11-20
PCT/EP2020/000196 WO2021104659A1 (en) 2019-11-20 2020-11-20 An energy storage system and a controller for an energy storage system

Publications (1)

Publication Number Publication Date
EP4062252A1 true EP4062252A1 (en) 2022-09-28

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EP20864269.4A Withdrawn EP4062252A1 (en) 2019-11-20 2020-11-20 An energy storage system and a controller for an energy storage system
EP20864270.2A Active EP4062253B1 (en) 2019-11-20 2020-11-20 An energy storage system for storing thermal energy and a controller and a method for determining a temperature in the energy storage system

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20864270.2A Active EP4062253B1 (en) 2019-11-20 2020-11-20 An energy storage system for storing thermal energy and a controller and a method for determining a temperature in the energy storage system

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Country Link
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WO (2) WO2021104659A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1259221B (en) * 1992-07-23 1996-03-11 Zanussi Elettrodomestici WASHING MACHINE WITH TEMPERATURE CONTROL DEVICE FOR ELECTRIC WATER HEATING BODIES
JPH09306637A (en) * 1996-05-10 1997-11-28 Ricoh Co Ltd Heater control device
WO2010069356A1 (en) * 2008-12-19 2010-06-24 Kautex Textron Cvs Limited Heating unit for a vehicular fluid heater
US9897334B2 (en) * 2011-06-03 2018-02-20 Rheem Australia Pty Limited Water heater controller or system
CA2959193A1 (en) * 2014-08-27 2016-03-03 Alpiq Intec Ag Method to heat water in an electrical boiler, corresponding device and electrical boiler
US20170211862A1 (en) * 2016-01-25 2017-07-27 Sharp Kabushiki Kaisha Dual temperature heat pump system

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WO2021104660A1 (en) 2021-06-03
EP4062253A1 (en) 2022-09-28
WO2021104659A1 (en) 2021-06-03
EP4062253B1 (en) 2024-04-24

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