Energy storage system

Abstract

The invention specifies an energy storage system (1) comprising an electrical charging station (3) for charging or discharging an electrical energy store of an electrically driven motor vehicle (4), a stationary energy store (2), an electrical source (5) and an electrical load (6). The energy storage system (1) further comprises an energy management system (7), the energy management system (7) being designed to store electrical energy from the electrical source (5) in the stationary energy store (2) and / or in the electrical energy store of the electrically driven motor vehicle (4) and / or to supply the electrical load (6) with electrical energy from the electrical source (5), the stationary energy store (2) and / or the electrical energy store of the electrically driven motor vehicle (4).

Description

[0001] Description

[0002] Energy storage system

[0003] An energy storage system is specified.

[0004] One problem to be solved is to provide an energy storage system that enables particularly efficient energy storage and particularly efficient operation of at least one electrical consumer.

[0005] The problem is solved by the features of the independent patent claims. Advantageous embodiments are characterized in the subclaims.

[0006] According to at least one embodiment, the energy storage system comprises an electric charging station for charging or discharging an electrical energy storage device of an electrically powered motor vehicle and a stationary energy storage device.

[0007] A stationary energy storage system, for example, is also a storage device for electrical energy, such as a battery storage system. A stationary energy storage system is designed, for example, as a home storage system for use in residential buildings.

[0008] According to at least one embodiment, the energy storage system comprises an electrical source and an electrical consumer.

[0009] The electrical source is, for example, a connection to a public power grid and / or a source of renewable energy such as a photovoltaic system.

[0010] According to at least one embodiment, the energy storage system further comprises an energy management system, wherein the energy management system is designed to store electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically powered motor vehicle. The energy management system can, for example, control the order in which the electrical energy from the electrical source is charged into the stationary energy storage device and into the electrical energy storage device of the electrically powered motor vehicle. Furthermore, the energy management system can, for example, prioritize the order in which the electrical energy from the electrical source is charged either into the stationary energy storage device or into the electrical energy storage device of the electric vehicle.For example, the energy management system is also designed to control a distribution of the electrical energy from the electrical source between the stationary energy storage device and the energy storage device of the electrically powered motor vehicle.

[0011] For example, the energy management system can adjust the energy flow of available electrical energy from the electrical source depending on the current requirements and priorities of the energy storage system. The energy management system can thus ensure optimal use of the available electrical energy from the electrical source.

[0012] Advantageously, storage efficiencies within the energy storage system can be maximized through flexible and efficient use of the available electrical energy from the electrical source.

[0013] According to at least one embodiment, the energy management system is alternatively or additionally designed to supply the electrical consumer with electrical energy from the electrical source, the stationary energy storage device and / or the electrical energy storage device of the electrically driven motor vehicle.

[0014] The energy management system is designed, for example, to control the order in which the electrical consumer is to be supplied with electrical energy from the electrical source, the stationary energy storage device, and / or the electrical energy storage device of the electrically powered motor vehicle. The energy management system is designed, for example, to control an energy flow from the electrical source, the stationary energy storage device, and / or the electrical energy storage device of the electrically powered motor vehicle and / or to establish a priority for supplying the electrical consumer from the electrical source, the stationary energy storage device, and / or the electrical energy storage device of the electrically powered motor vehicle.For example, the energy management system is also designed to determine a distribution of the required electrical energy from the electrical source, the stationary energy storage device and / or the energy storage device of the electrically powered motor vehicle to supply the electrical consumer.

[0015] The energy management system can, for example, be configured to adjust the energy flow required to supply the electrical load from the electrical source, the stationary energy storage device, and / or the energy storage device of the electrically powered motor vehicle depending on the current requirements and / or priorities of the energy storage system. For example, the energy flow to supply the electrical load is adjusted based on operating conditions and user specifications.

[0016] The energy management system can thus ensure optimal use of the available electrical energy from the electrical source, the stationary energy storage unit, and / or the energy storage unit of the electrically powered vehicle. If the electrical consumer is supplied with electrical energy from the stationary energy storage unit and / or the energy storage unit of the electrically powered vehicle, the energy storage unit(s) is discharged accordingly.

[0017] Advantageously, energy efficiencies within the energy storage system can be maximized through flexible and efficient use of the available electrical energy from the electrical source, the stationary energy storage device, and / or the energy storage device of the electrically powered motor vehicle. According to at least one embodiment of the energy storage system, the energy management system is configured to distribute electrical energy between the stationary energy storage device and the energy storage device of the electrically powered motor vehicle.

[0018] For example, the stationary energy storage device and / or the energy storage device of the electrically powered motor vehicle can be used as an intermediate storage device for electrical energy. For example, the energy storage devices can be used as intermediate storage devices to offer energy on an energy market. For example, the energy management system is configured to implement a balancing measure to offer the temporarily stored electrical energy on an energy market in order to match the electrical power supply to the electrical power demand of an electrical network.

[0019] According to at least one embodiment of the energy storage system, the energy management system is designed to store the electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically driven motor vehicle as a function of a power of the electrical energy from the electrical source and / or of a respective efficiency of the storage process.

[0020] For example, the stationary energy storage system is designed to support the average base load of a residential building over a certain period of time. The average base load refers, for example, to the continuous power demand of electrical devices and / or systems within the residential building. A typical average base load for a residential building is one to two kilowatts.

[0021] The energy storage unit of an electrically powered vehicle, for example, is designed to supply electrical energy to the home during times of increased energy demand, for example, to cover peak loads. For example, the electrical energy storage unit of an electrically powered vehicle is designed for a charging or discharging capacity of ten kilowatts. Depending on the power with which electrical energy is fed from the electrical source into the energy storage system, it may be more energy-efficient to store the electrical energy in the stationary energy storage unit or in the electrical energy storage unit of the electrically powered vehicle.

[0022] Depending on whether a storage process of the electrical energy from the electrical source into the stationary energy storage device or into the energy storage device of the electrically powered vehicle has a higher efficiency, it is energetically more efficient to store the electrical energy from the electrical source in the corresponding energy storage device in order to minimize the energy loss during the storage process.

[0023] Depending on whether the electrical power fed in from the electrical source corresponds to the designed storage area of ​​the stationary energy storage device or the energy storage device of the electrically powered motor vehicle, the electrical power from the electrical source is stored, for example, in the respective energy storage device.

[0024] By storing the electrical energy from the electrical source in the corresponding energy storage device depending on the power of the electrical energy from the electrical source and / or on the respective efficiency of the storage process, the storage efficiency can be maximized and energy losses minimized.

[0025] For example, the electrical source has means to transmit a corresponding parameter regarding the electrical power fed in to the energy management system.

[0026] According to at least one embodiment of the energy storage system, the energy management system is designed to store the electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically driven motor vehicle as a function of a state of health and / or storage wear and / or electronic wear of the stationary energy storage device and / or the electrical energy storage device of the electrically driven motor vehicle.

[0027] Factors such as health status, storage wear, and / or electronics wear, for example, affect the performance and / or efficiency of the respective energy storage device. The better the health status or the lower the wear, the more energy-efficiently the electrical energy storage device can operate.

[0028] By storing electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically powered motor vehicle depending on the state of health, the storage device wear and / or the electronics wear, the energy efficiency of the energy storage system can be maximized.

[0029] The health and wear of the stationary energy storage system and / or the energy storage system of the electrically powered vehicle are determined, for example, based on calendar and cyclical aging. Electronic wear is determined, for example, based on operating hours.

[0030] For example, the energy management system is additionally designed to store the electrical energy from the electrical source in the stationary energy storage device and / or in the energy storage device of the electrically powered motor vehicle depending on the charge levels of the respective energy storage devices, in order to avoid, for example, increased wear of the respective energy storage device due to high charge levels.

[0031] For example, the stationary energy storage system and the energy storage system of the electrically powered vehicle have means to monitor the corresponding parameters and transmit them to the energy management system.

[0032] According to at least one embodiment of the energy storage system, the energy management system is designed to store the electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically driven motor vehicle as a function of a predicted or predetermined departure time and / or a predicted or predetermined charge level of the electrically driven motor vehicle.

[0033] For example, the electrical energy from the electrical source is stored in the stationary energy storage device and / or in the electrical energy storage device of the electrically powered motor vehicle depending on a predicted or predetermined charge level at the predetermined or predicted departure time.

[0034] For example, the departure time and / or charge level are specified by a user of the electrically powered vehicle. Alternatively or additionally, the departure time and / or charge level are predicted, for example, using stored user profiles in the electrically powered vehicle and transmitted to the energy management system.

[0035] Because the energy management system is designed to store electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically powered motor vehicle depending on a predicted or predetermined charge level at the predetermined or predicted departure time, the mobility requirements of the vehicle user are advantageously ensured.

[0036] For example, electrical energy is charged from the electrical source into the energy storage device of the electrically powered vehicle if it is predicted that a vehicle user will want to use the electrically powered vehicle soon, but a specified charge level has not yet been reached.

[0037] According to at least one embodiment of the energy storage system, the energy management system is designed to store the electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically driven motor vehicle depending on a forecast of a future amount of energy provided by the electrical source and / or a forecast of a future energy requirement of the electrical consumer.

[0038] Using a photovoltaic system as an example, weather data can be used to predict the amount of energy that the electrical source can provide. Using average energy consumption profiles of a residential building, for example, a forecast of the time-dependent electrical energy demand can be determined.

[0039] For example, the charging process of the energy storage device of an electrically powered motor vehicle can be time-adapted to a forecast of the amount of energy provided by the electrical source if it is forecast that the electrical source will supply an electrical power that corresponds to the charging power of the energy storage device of the electrically powered motor vehicle.

[0040] This enables, for example, maximizing charging efficiency and minimizing electrical energy losses caused by previous storage processes in stationary energy storage systems.

[0041] According to at least one embodiment of the energy storage system, the energy management system is designed to store the electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically driven motor vehicle as a function of a temperature of the stationary energy storage device and / or a temperature of the electrical energy storage device of the electrically driven motor vehicle.

[0042] For example, the temperature of the respective energy storage device can impair the efficiency of the respective energy storage device and shorten the service life of the respective energy storage device.

[0043] Because the energy management system is designed to store electrical energy from the electrical source in the stationary energy storage device and / or in the electrical energy storage device of the electrically powered motor vehicle as a function of a temperature, the storage efficiency and the service life of the respective energy storage device can be improved.

[0044] According to at least one embodiment of the energy storage system, the energy management system is designed to supply the electrical consumer with electrical energy from the electrical source, the stationary energy storage device and / or the electrical energy storage device of the electrically driven motor vehicle as a function of a power of the electrical consumer.

[0045] For example, the electrical consumer can be supplied by the electrical source, the stationary energy storage device and / or the energy storage device of the electrically powered motor vehicle, depending on which source and / or energy storage device has the most efficient efficiency for supplying the electrical consumer.

[0046] In an advantageous manner, the efficiency of the supply to the electrical consumer within the energy storage system can be maximized, the energy flow optimized and thus energy losses minimized.

[0047] For example, high-power electrical loads are supplied by the energy storage system of the electrically powered vehicle, and low-power electrical loads are supplied by the stationary energy storage system. For example, the electrical load is supplied by the electrical source if the electrical power required by the electrical load is fed into the energy storage system from the electrical source at the given time.

[0048] For example, the energy storage system includes several consumers.

[0049] According to at least one embodiment of the energy storage system, the energy management system is designed to supply the electrical consumer with electrical energy from the electrical source, the stationary energy storage device and / or the electrical energy storage device of the electrically driven motor vehicle depending on a state of health and / or storage wear and / or electronics wear of the stationary energy storage device and / or the electrical energy storage device of the electrically driven motor vehicle.

[0050] For example, a priority can be set in which the electrical consumer is supplied by the electrical source, the stationary energy storage device and / or the energy storage device of the electrically powered vehicle, depending on which supply source has the best state of health and / or the lowest wear.

[0051] In this way, the service life of the electrical source and / or the electrical energy storage device can be advantageously improved.

[0052] According to at least one embodiment of the energy storage system, the energy management system is designed to supply the electrical consumer with electrical energy from the electrical source, the stationary energy storage device and / or the electrical energy storage device of the electrically powered motor vehicle as a function of a predicted or predetermined departure time and / or a predicted or predetermined charge level at the departure time of the electrically powered motor vehicle.

[0053] For example, the electrical consumer is supplied by the stationary energy storage device and / or the electrical source when the electrical energy storage device of the electrically powered motor vehicle needs to be charged in order to reach a predetermined charge level at a predetermined departure time.

[0054] This ensures that the vehicle user’s mobility requirements are met in an advantageous manner.

[0055] According to at least one embodiment of the energy storage system, the energy management system is designed to supply the electrical consumer with electrical energy from the electrical source, the stationary energy storage device and / or the electrical energy storage device of the electrically driven motor vehicle depending on a forecast of a future amount of energy provided by the electrical source and / or a forecast of a future energy requirement of the electrical consumer.

[0056] For example, the supply to the electrical consumer can be adjusted in time to a forecast of the amount of energy supplied by the electrical source if it is forecast that the electrical source will supply an electrical power that corresponds to the electrical power of the electrical consumer.

[0057] This makes it possible, for example, to avoid energy losses caused by discharging the stationary energy storage system and / or the energy storage system of the electrically powered vehicle. This advantageously increases the efficiency of the energy storage system.

[0058] Embodiments of the invention are explained in more detail below with reference to the schematic drawings. They show:

[0059] Figure 1 shows an energy storage system.

[0060] Figure 1 shows an energy storage system 1 comprising an electric charging station 3 for charging or discharging an electrical energy storage device of an electrically powered motor vehicle 4. The energy storage system 1 further comprises a stationary energy storage device 2.

[0061] The electric charging station 3 is, for example, a wall box in a garage of a residential building of a user of the electrically powered motor vehicle 4. The stationary energy storage device 2 is located, for example, in the residential building of the user of the electrically powered motor vehicle 4.

[0062] The energy storage system further comprises a connection to a public power grid, another electrical source 5 and an electrical consumer 6.

[0063] The electrical source 5 is, for example, a photovoltaic system on the roof of the residential building. The electrical source 5 is designed, for example, to charge the stationary energy storage device 2 and / or the energy storage device of the electrically powered motor vehicle 4 and / or to supply the electrical consumer 6 with electrical energy.

[0064] For example, electrical consumer 6 is a heat pump. Electrical consumer 6 requires a power output of 10 kilowatts.

[0065] The energy storage system further comprises an energy management system 7, wherein the energy management system 7 is designed to store electrical energy from the electrical source 5 in the stationary energy storage device 2 and / or in the electrical energy storage device of the electrically powered motor vehicle 4.

[0066] For example, the efficiency of a storage process for electrical energy in the stationary energy storage device 2 or in the energy storage device of the electrically powered motor vehicle 4 is dependent on the electrical power of the electrical energy from the electrical source 5.

[0067] For example, the corresponding efficiencies depending on the electrical power for the respective energy storage device are stored in the energy management system upon initiation.

[0068] For example, the efficiency of the storage process for electrical energy from a power of 6 kW in the electrical energy storage of the electrically powered motor vehicle 4 has a higher value than the corresponding efficiency for the storage process in the stationary energy storage 2.

[0069] Below a power of 2 kW, the efficiency of the storage process for electrical energy is, for example, higher in the stationary energy storage unit 2 than in the energy storage unit of the electrically powered motor vehicle 4.

[0070] For example, on a sunny day, 10 kilowatts of electrical power is fed into the energy storage system 1 from the electrical source 5.

[0071] With an electrical power fed in of 10 kW, the

[0072] The energy management system is designed, for example, to store the electrical power in the electrical energy storage device of the electrically powered motor vehicle 4 based on its efficiency in order to minimize energy losses and increase storage efficiency.

[0073] When the energy storage device of the electrically powered motor vehicle is fully charged or has reached a predetermined maximum charge level, the energy management system is designed, for example, to charge the stationary energy storage device 2 with the energy fed in from the electrical source 5.

[0074] The energy management system 7 is alternatively or additionally designed to supply the electrical consumer 6 with electrical energy from the electrical source 5, the stationary energy storage device 2 and / or the electrical energy storage device of the electrically driven motor vehicle 4.

[0075] For example, the energy management system 7 detects that the electrical consumer 6 is started while the electrical source 5 feeds the electrical power of 10 kW into the energy storage system.

[0076] Since the electrical consumer 6 requires an electrical supply power corresponding to the electrical power fed in from the electrical source 5, the energy flow is, for example, adjusted by the energy management system 7 such that the electrical consumer 6 is supplied by the electrical source 5.

[0077] When no more electrical power is fed into the energy storage system from the electrical source 5, the energy management system 7 is designed, for example, to supply the electrical consumer s with electrical power from the stationary energy storage device 2 and / or the electrical energy storage device of the electrically driven motor vehicle 4 depending on the efficiency in order to minimize possible energy losses during a discharge process of the respective energy storage device.

[0078] For example, an electrical consumer with a required power of between 2 and 6 kW is supplied with electrical energy from the stationary energy storage device 2 and / or the electrical energy storage device of the electrically powered motor vehicle 4 depending on a state of health and / or storage wear and / or electronics wear of the stationary energy storage device 2 and / or the electrical energy storage device of the electrically powered motor vehicle 4 and / or a predicted or predetermined departure time and / or a predicted or predetermined charge level at the departure time of the electrically powered motor vehicle 4 and / or a forecast of a future amount of energy provided by the electrical source 5 and / or a forecast of a future energy requirement of the electrical consumer 6, if no electrical energy is fed into the energy storage system via the electrical source 5.

[0079] Furthermore, it can be specified, for example, that an electrical consumer of the energy storage system is supplied with priority by electrical energy from the electrical source 5.

[0080] List of reference symbols

[0081] 1 energy storage system

[0082] 2 stationary energy storage 3 electric charging station

[0083] 4 electrically powered motor vehicle

[0084] 5 electrical source

[0085] 6 electrical consumers

[0086] 7 Energy management system

Claims

Patent claims 1. Energy storage system (1 ) comprising - an electric charging station (3) for charging or discharging an electrical energy storage device of an electrically powered motor vehicle (4), - a stationary energy storage device (2), - an electrical source (5), - an electrical consumer (6), and - an energy management system (7), wherein the energy management system (7) is designed to store electrical energy from the electrical source (5) in the stationary energy storage device (2) and / or in the electrical energy storage device of the electrically driven motor vehicle (4) and / or to supply the electrical consumer (6) with electrical energy from the electrical source (5), the stationary energy storage device (2) and / or the electrical energy storage device of the electrically driven motor vehicle (4).

2. Energy storage system (1) according to claim 1, wherein the energy management system (7) is designed to store the electrical energy from the electrical source (5) in dependence on an electrical power of the electrical energy from the electrical source (5) and / or on a respective efficiency of the storage process in the stationary energy storage device (2) and / or in the electrical energy storage device of the electrically driven motor vehicle (4).

3. Energy storage system (1) according to claim 1 or 2, wherein the energy management system (7) is designed to store the electrical energy from the electrical source (5) in the stationary energy storage device (2) and / or in the electrical energy storage device of the electrically driven motor vehicle (4) as a function of a state of health and / or storage wear and / or electronics wear of the stationary energy storage device (2) and / or the electrical energy storage device of the electrically driven motor vehicle (4).

4. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to store the electrical energy from the electrical source (5) in the stationary energy storage device (2) and / or in the electrical energy storage device of the electrically driven motor vehicle (4) as a function of a predicted or predetermined departure time and / or a predicted or predetermined charge level at the departure time of the electrically driven motor vehicle (4).

5. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to store the electrical energy from the electrical source (5) in the stationary energy storage device (2) and / or in the electrical energy storage device of the electrically driven motor vehicle (4) as a function of a forecast of a future amount of energy provided by the electrical source (5) and / or a forecast of a future energy requirement of the electrical consumer (6).

6. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to store the electrical energy from the electrical source (5) in the stationary energy storage device (2) and / or in the electrical energy storage device of the electrically driven motor vehicle (4) as a function of a temperature of the stationary energy storage device (2) and / or a temperature of the electrical energy storage device of the electrically driven motor vehicle (4).

7. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to supply the electrical consumer (6) with electrical energy from the electrical source (5), the stationary energy store (2) and / or the electrical energy store of the electrically driven motor vehicle (4) as a function of an electrical power of the electrical consumer (6).

8. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to control the electrical load (6) depending on a state of health and / or storage wear and / or electronic wear of the stationary energy storage device (2) and / or the electrical energy storage device of the electrically driven motor vehicle (4) with electrical energy from the electrical source (5), the stationary energy storage device (2) and / or the electrical energy storage device of the electrically driven motor vehicle (4).

9. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to supply the electrical consumer (6) with electrical energy from the electrical source (5), the stationary energy storage device (2) and / or the electrical energy storage device of the electrically driven motor vehicle (4) as a function of a predicted or predetermined departure time and / or a predicted or predetermined charge level at the departure time of the electrically driven motor vehicle (4).

10. Energy storage system (1) according to one of the preceding claims, wherein the energy management system (7) is designed to supply the electrical consumer (6) with electrical energy from the electrical source (5), the stationary energy storage device (2) and / or the electrical energy storage device of the electrically driven motor vehicle (4) depending on a forecast of a future amount of energy provided by the electrical source (5) and / or a forecast of a future energy requirement of the electrical consumer (6).

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