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Title:
A SYSTEM AND A METHOD FOR WIRELESS POWER SHARING IN A MICROGRID SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/180195
Kind Code:
A1
Abstract:
The disclosure relates to a system for wireless power sharing in a microgrid system comprising one or more portable and transportable energy storage units comprising means for wireless power transfer of energy to or from one or more electrical power generator in the microgrid system; the means for wireless power transfer is adapted to transfer energy to or from the one or more electrical power generator; wherein the energy is shared with a central consumer and/or a plurality of other connected storage devices/unit. The disclosure further relates to a method of wireless power sharing in a microgrid system.

Inventors:
KVÅLE ANDERS EVEN (NO)
GLASCOCK-ILLESCAS NICHOLAS (NO)
Application Number:
NO2020/050060
Publication Date:
September 10, 2020
Filing Date:
March 05, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ALTERED POWER AS (NO)
International Classes:
H02J3/28; B60L53/12; H02J3/38; H02J5/00; H02J7/34; H02J50/10
Foreign References:
US9987937B12018-06-05
CN204669058U2015-09-23
US20130099587A12013-04-25
US20140070624A12014-03-13
Attorney, Agent or Firm:
ZACCO NORWAY AS (NO)
Download PDF:
Claims:
1. A system for wireless power sharing in a microgrid system comprising one or more portable and transportable energy storage units comprising means for wireless power transfer of energy to or from one or more electrical power generators in the microgrid system;

the means for wireless power transfer is adapted to transfer energy to or from the one or more electrical power generators; wherein the energy is shared with a central consumer and/or a plurality of other connected storage devices/unit.

2. The system according to claim 1, wherein the energy is transferred using magnetic inductive power transfer.

3. The system according to claims 1 or 2, wherein one of the other connected storage devices is one or more electrical transportation units.

4. The system according to any one of the proceeding claims, wherein the one or more transportation units comprise at least one battery, wherein the at least one battery is used as a storage device.

5. The system according to claim 1, wherein the energy storage units comprises wireless power transmitter and receiver.

6. The system according to claim 1, wherein the electrical power generator is one or more of a solar panel, a turbine or other electrical source.

7. The system according to any one of the proceeding claims, wherein the system further comprises a central control unit adapted to sending and receiving signals to one or more of the portable and transportable energy storage units for controlling the energy sharing between the plurality of portable and transportable energy storage units and a central storage unit.

8. The system according to claim 7, wherein the central control unit is adapted to predicting available power from the connected one or more portable and

transportable energy storage units and to manage energy based on available connected energy and a predicted generated energy.

9. The system according to any one of the proceeding claims, further comprising a central sharing communication unit adapted to logging received and transmitted power providing an energy account for the consumer of one or more portable and

transportable energy storage units and the electrical power generator.

10. The system according to claim 9, wherein the central sharing communication unit

comprises one or more transmitters and receivers configured for wireless data transfer.

11. The system according to claim 9 or 10, wherein the central sharing communication unit comprises a cloud service unit adapted to communicate with a cloud service, such that the consumer of one or more portable and transportable energy storage units and the electrical power generator can earn and use energy credits.

12. The system according to claim 4, wherein the transportation units are vehicles.

13. A method of wireless power sharing in a microgrid system according to any one of the claims 1-12, the method comprising the steps of: sharing an electrical power from an electrical power generator or from one or more electrical power storage units using magnetic inductive power transfer with one or more storage units that have been connected by a consumer.

Description:
A system and a method for wireless power sharing in a microgrid system

Technical field

The present disclosure relates to a system for wireless power sharing in a microgrid system and method of wireless power sharing in a microgrid system. More specifically, the disclosure relates to a system for wireless power sharing in a microgrid system, a system for wireless power sharing and a method of wireless power sharing in a microgrid system as defined in the introductory parts of claim 1 and claim 11.

The present invention builds on and claims priority to the earlier patent application:

N020190300, which is hereby incorporated by reference herein in its entirety or copied in its whole. In the latter case the earlier patent application is recited at the end of this document wherein figure references are renumbered by adding 1000, and figure numbers by 100.

Background art

Distribution of electrical energy is normally accomplished by an electrical grid or with batteries. An electrical grid has high initial capital costs with low operating costs, once implemented. Batteries have both high capital costs and high operating costs. An alternative to central power generation distributed with a large electrical grid is local power generation. The tradeoff, however, is that local power generation tends to lack the generation capacity to supply a varying, and oftentimes unpredictable, local demand.

Small households in rural areas that use off-grid power typically use a combination of solar panels and batteries suitable for low power equipment typically running with a 12 V battery configuration used for powering LED lights, small refrigerators, small fans, cell phone charging, radio or other electronic equipment. Several solar panels and larger battery packs are required for higher power demand equipment such as TVs, refrigerators, bigger ceiling fans, mills, machines or cooking equipment. It is not economically feasible for many private households to each install their own large solar panels to enable high power equipment. Small solar panel farms connected through a small power grid to individual homes can supply higher power, however these projects have high construction and maintenance costs. For areas with high poverty, solar farm/wind turbine projects with a power grid are too expensive.

Remote work locations that do not have access to a national grid require another means of electricity generation if they use electrical equipment.

The military is another common user of electricity in off grid locations. As the military uses more and more electronic equipment, the need for charging several types of equipment like night vision, radio, tablet pc and other electronic devices increases. For higher power demand operations like heating water and cooking, they typically use fuel as an energy source, which is not limitless.

Vehicles, both large and small, both autonomous and non-autonomous are in a transition of being electrified and there is a need for a network of robust charging stations that can operate in all kinds of weather conditions. Charging of vehicles outdoors can be challenging due to weather exposure, dust, freezing temperature, and mechanical failure. Another problem is access to energy due to a lack of a national grid connection. Grid connection can be a problem in urban areas since gravel work for cables can be expensive and problematic due to regulations. For many rural locations, a national grid is not available resulting in a situation where energy has to be generated and/or shared. There is a need for an outdoor charging solution that does not require connection to a national electrical grid.

Establishing manned or unmanned off- grid operational stations or camps, e.g measurement stations, remote work locations, military camps, will in most cases require energy. Energy can be supplied with electrical generators powered with fuel or a large renewable energy installation for local generation. These solutions can be expensive and have a long installation time. There is a need for a more efficient and smarter power supply for these applications.

For people or equipment in off-grid locations there is a market need for a plug and play solution to enable higher power capacity with low construction cost and no maintenance cost. In many scenarios electrical energy transfer is needed in an outdoor environment with physical stresses caused by connection and disconnection of contacts. There is a need for a technology that avoids these repeated physical contact stresses and allows for a robust energy delivery method that can be used in outdoor environments. Summary

It is an object of the present disclosure to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages in the prior art and solve at least the above mentioned problem. According to a first aspect there is provided a system for wireless power sharing in a microgrid system comprising one or more portable and transportable energy storage units comprising means for wireless power transfer of energy to or from one or more electrical power generator in the microgrid system; the means for wireless power transfer is adapted to transfer energy to or from the one or more electrical power generator; wherein the energy is shared with a central consumer and/or a plurality of other connected storage devices/unit.

According to some embodiments, the energy is transferred using magnetic inductive power transfer.

According to some embodiments, one of the other connected storage devices is one or more electrical transportation units.

According to some embodiments, the one or more transportation units comprise at least one battery, wherein the at least one battery is used as a storage device.

According to some embodiments, the energy storage units comprises wireless power transmitter and receiver.

According to some embodiments, the electrical power generator is one or more of a solar panel, a turbine or other electrical source.

According to some embodiments, the system further comprises a central control unit adapted to sending and receiving signals to one or more of the portable and transportable energy storage units for controlling the energy sharing between the plurality of portable and transportable energy storage units and a central storage unit.

According to some embodiments, the central control unit is adapted to predicting available power from the connected one or more portable and transportable energy storage units and to manage energy based on available connected energy and a predicted generated energy. According to some embodiments, the system comprises a central sharing communication unit adapted to logging received and transmitted power providing an energy account for the consumer of one or more portable and transportable energy storage units and the electrical power generator.

According to some embodiments, the central sharing communication unit comprises one or more transmitters and receivers configured for wireless data transfer.

According to some embodiments, the central sharing communication unit comprises a cloud service unit adapted to communicate with a cloud service, such that the consumer of one or more portable and transportable energy storage units and the electrical power generator can earn and use energy credits.

According to some embodiments, the transportation units are vehicles.

According to a second aspect there is provided a method of wireless power sharing in a microgrid system according to the first aspect.

Effects and features of the second aspect are to a large extent analogous to those described above in connection with the first aspect. Embodiments mentioned in relation to the first aspect are largely compatible with the second aspect.

The present disclosure will become apparent from the detailed description given below. The detailed description and specific examples disclose preferred embodiments of the disclosure by way of illustration only. Those skilled in the art understand from guidance in the detailed description that changes and modifications may be made within the scope of the disclosure.

Hence, it is to be understood that the herein disclosed disclosure is not limited to the particular component parts of the device described or steps of the methods described since such device and method may vary. It is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting. It should be noted that, as used in the specification and the appended claim, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements unless the context explicitly dictates otherwise. Thus, for example, reference to "a unit" or "the unit" may include several devices, and the like. Furthermore, the words "comprising", "including", "containing" and similar wordings does not exclude other elements or steps.

Terminology - microgrid is to be interpreted as a network used for the transfer of energy between energy producers, consumers and, optionally, to and from storage units. The microgrid can operate with or without a connection to a national electricity grid. Components that make up a microgrid include energy consumers and energy producers and/or storage units. A central control unit is used for directing the flow of energy between users, and, if applicable, a national electricity grid. More specifically, these can be energy storage units (e.g. batteries) that can supply or demand energy from the microgrid, generators (e.g. solar panels, turbines) that can supply energy to the microgrid, or user equipment (e.g. lights, electric machines, electric household tools) that demands energy from the microgrid. Energy storage units and generators can be portable over long distances by means of a vehicle, which allows microgrids to be established at relatively long distances from a national electricity grid.

Brief descriptions of the drawings

The above objects, as well as additional objects, features and advantages of the present disclosure, will be more fully appreciated by reference to the following illustrative and non limiting detailed description of example embodiments of the present disclosure, when taken in conjunction with the accompanying drawings.

Figure 1 shows an energy storage according to an embodiment of the present disclosure. Figure 2 shows an energy storage according to another embodiment of the present disclosure. Figure 3 shows an energy storage according to another embodiment of the present disclosure.

Detailed description

The present disclosure will now be described with reference to the accompanying drawings, in which preferred example embodiments of the disclosure are shown. The disclosure may, however, be embodied in other forms and should not be construed as limited to the herein disclosed embodiments. The disclosed embodiments are provided to fully convey the scope of the disclosure to the skilled person.

Figure 1 shows an energy storage device 1 that may be adapted to transmit and receive electrical power wirelessly from an electrical power generator device 3, the energy storage device 1 and/or the electrical power generator device may be transmitting and receiving low power and low voltage or may be configured to receive high power and high voltage. The energy storage unit may be a battery. The electrical power generator 3 may comprise an inductive wireless power transmitter 2, which may be integrated in the electrical power generator 3 or may be an external inductive wireless power transmitter attached to the generator 3. The electrical power generator 3 may be a solar panel or a turbine or may be any other electrical power source. Wireless power may be transmitted to the energy storage device 1 from the electrical power generator 3. The energy storage device may comprise both a wireless power receiver and transmitter. The consumer 4 may have a wireless power receiver and may receive electrical power from the energy storage device to operate devices such as electronic equipment. The storage device 1 and/or the generator device 3 may be configured to deliver energy to a wired device via a receiver 5 to a power port 6. Wireless power may also be transmitted directly to a consumer 4 from the electrical power generator 3.

Fig. 2 and Fig. 3, show a microgrid system 200 comprising of one or more energy storage device(s) 1 that is adapted to wirelessly transmit and receive energy to/from a central unit 9, at least one electrical power generator 3 adapted to transmit electrical power to the central unit 9 via a wireless transmitter 2, one or more transportation units 7 adapted to wirelessly transmit and receive energy to/from the central unit 9. Power to/from the microgrid system may be received/transmitted at docking locations connected to a primary cable connection 10. The microgrid system 200 may further comprise a central sharing communication microgrid unit 11 connected with cables. Alternating current (AC) or direct current (DC) electrical power may be transmitted through the primary cable connection 10 to the central sharing communication microgrid unit 11. The central sharing communication microgrid unit 11 may be configured for logging the electrical power that is received and transmitted in the microgrid system 200. The microgrid system may further comprise a plurality of portable units configured for wirelessly transmitting and receiving energy to/from the central unit 9. Fig. 3 shows that the system 200 may further comprise a central battery storage unit 12, a central power generation unit 13, and an AC to DC inverter 14 for enabling power sharing to a large-scale power grid 15. The microgrid system 200 shown in figures 2 and 3 illustrate that the central battery 12, the central generator 13, the transportation storage units 7, the portable units, the generator 3 or the one or more energy storage device 1 alone or in combination are able to supply electrical energy to the system 200. For example, the system may be adapted such that only the transportation storage units and generator units supply energy to the central consumers connected to the microgrid system 200. The transportation storage units 4 can be autonomous, semi-autonomous or non-autonomous vehicles. The transportation storage units may be a replaceable or non-replaceable vehicle battery. The transportation storage units 4 may be able to receive electrical energy from another region and supply into the system 200 or vice versa. Several portable energy storage units and/or transportation storage units may be connected together, such that the available power is sufficient enough for powering power demanding electrical machines, light or other electrical equipment without the need of the electrical generators.

Wireless electrical energy may be received and transmitted by using magnetic inductive power transfer. Use of magnetic inductive power transfer, both resonant and non-resonant, as energy transfer methods enable a robust interface and reduce problems with human errors. The wireless power transfer communication may be either one-way or bidirectional to regulate and ensure safe and reliable power transfer.

In an embodiment of the present disclosure individual households may consume electrical power from the portable and transportable energy storage unit 1 in the evening and recharge the portable and transportable energy storage unit in the morning/day with the generator 3 in the system 100 shown in Fig. 1. A consumer may be able to bring the portable and

transportable energy storage unit 1 to a workplace, school or a public place where the microgrid system 200 is available and connect the portable and transportable energy device unit for charging. The microgrid system 200 may be positioned at a community hall, a school, a church, a military campus, a research center or any other type of camp where several consumers share electrical energy. For example, in military applications, a central unit could be positioned at a military base camp where personnel would be able to connect their portable and

transportable energy storage units for charging. The portable and transportable energy storage units could then be used for powering electrical military equipment (e.g.

telecommunication, electrical heating pad) when mobility is needed. When several portable and transportable energy storage units are connected together, the available power can supply high-power electrical devices.

In an embodiment of the present disclosure the electrical transportation unit 8 may include a battery as fixed or replaceable. The battery from the transportation unit 8 may deliver and receive electrical energy from and to the central battery storage unit 12 or the central unit 9, or optionally, receive energy from the central power generator 13 or the electrical power generator 3. Sharing of energy in this manner enables charging of transportation vehicles without the need of physical energy grid connections. This eliminates the cost related to construction and maintenance of these grid connections.

The wireless power transfer may also provide bidirectional data communication, enabling logging of consumed and delivered energy for each of the devices in the microgrid system in an energy account. This may enable opportunities to create incentives for sharing and generating energy. The energy account may also be used to facilitate a marketplace for energy, resulting in the possibility for consumers that are using less energy and produce more energy to sell surplus energy. In one example, blockchain technology may be beneficial to use for the energy-sharing platform to keep track of the energy transfers. This may be useful when energy is delivered and received at several locations without internet connection.

The microgrid systems 100 and 200 may be formed by individuals bringing several energy storage and/or production units together. Charged energy storage units may be delivered to the system by land, water, or air via autonomous or semi-autonomous vehicles. The microgrid systems may be established further away from a national grid, relying on autonomous vehicles to periodically deliver stored energy to the microgrid.

The first aspect of this disclosure shows a system for wireless power sharing in a microgrid system comprising one or more portable and transportable energy storage units comprising means for wireless power transfer of energy to or from one or more electrical power generator in the microgrid system; the means for wireless power transfer is adapted to transfer energy to or from the one or more electrical power generator; wherein the energy is shared with a central consumer and/or a plurality of other connected storage devices/unit.

The system further comprises a central control unit adapted to sending and receiving signals to the portable and transportable energy storage units for controlling energy sharing between the plurality of portable and transportable energy storage units and a central storage unit.

The central control unit is adapted to predicting available power from the connected one or more portable and transportable energy storage units and to manage energy based on available connected energy and a predicted generated energy.

The first aspect of this disclosure shows a system for wireless power sharing in a microgrid system comprising one or more portable and transportable energy storage units comprising means for wireless power transfer of energy to or from one or more electrical power generator in the microgrid system; the means for wireless power transfer is adapted to transfer energy to or from the one or more electrical power generator; wherein the energy is shared with a central consumer and/or a plurality of other connected storage devices/unit.

The energy is transferred using magnetic inductive power transfer. One of the other connected storage devices is one or more electrical transportation units. The one or more transportation units comprise at least one battery, wherein the at least one battery is used as a storage device. The energy storage units comprises wireless power transmitter and receiver.

The electrical power generator is one or more of a solar panel, turbine or other electrical source. The system further comprises a central control unit adapted to sending and receiving signals to one or more of the portable and transportable energy storage units for controlling the energy sharing between the plurality of portable and transportable energy storage units and a central storage unit.

The central control unit is adapted to predicting available power from the connected one or more portable and transportable energy storage units and to manage energy based on available connected energy and a predicted generated energy.

The system comprises a central sharing communication unit adapted to logging received and transmitted power providing an energy account for the consumer of one or more portable and transportable energy storage units and the electrical power generator.

The central sharing communication unit comprises one or more transmitters and receivers configured for wireless data transfer. The central sharing communication unit comprises a cloud service unit adapted to communicate with a cloud service, such that the consumer of one or more portable and transportable energy storage units and the electrical power generator can earn and use energy credits. The transportation units may be vehicles or other any other transportation vessels.

The second aspect of this disclosure shows a method of wireless power sharing in a microgrid system according to the first aspect.

The third aspect of this disclosure shows a method of wireless power sharing in a microgrid system wherein electrical power is transmitted from an electrical power generator using magnetic inductive power transfer to one or more electrical power storage units, sharing stored energy to one or more electrical power storage units that have been connected by consumers, and logging the shared electrical power in each of the one or more electrical power storage units.

In the exemplary embodiments, various features and details are shown in combination. The fact that several features are described with respect to a particular example should not be construed as implying that those features by necessity have to be included together in all embodiments of the invention. Conversely, features that are described with reference to different embodiments should not be construed as mutually exclusive. As those with skill in the art will readily understand, embodiments that incorporate any subset of features described herein and that are not expressly interdependent have been contemplated by the inventor and are part of the intended disclosure. However, explicit description of all such embodiments would not contribute to the understanding of the principles of the invention, and consequently some permutations of features have been omitted for the sake of simplicity or brevity. The person skilled in the art realizes that the present disclosure is not limited to the preferred embodiments described above. The person skilled in the art further realizes that modifications and variations are possible within the scope of the appended claims.

Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed disclosure, from a study of the drawings, the disclosure, and the appended claims.

PRIORITY APPLICATIONS: NO 20190300

SYSTEM FOR WIRELESS POWER SHARING IN MICRO GRIDS TECHNICAL FIELD

[0001] The present invention relates to systems for wireless power sharing in micro grids. BACKGROUND

[0002] Small house holding solar panels and batteries are suitable for low power equipment typically running with 12 V battery configuration, powering typically LED light, small refrigerators, ceiling fan, cell phone charging, radio or other electronic equipment.

For higher power demand equipment as TV, refrigerator, bigger ceiling fans, mills, machines or cooking are several solar panels and larger batteries required. It is not economically feasible for many private house holding with large solar panels to enable high power equipment. Small solar panel farms with power grid to individual homes can supply higher power supply, however these projects have high construction and maintenance cost. For the areas with high poverty are solar farm/ wind turbine projects with power grid to expensive.

[0003] It is therefore a need for in the market for a plug and play solution with low construction cost and no maintenance cost. It is also a market where it is beneficial to share the energy production capacity.

SHORT SUMMARY

[0004] A goal with the present invention is to overcome the problems of prior art, and to disclose a system. [0005] The invention solving the above mentioned problems is a system according to the independent claims.

[0006] An effect of the invention is that it increases the utilization of energy storage and generators as typical solar power will have peak production around midday and the battery connected together creates a great buffer for collecting and distribute the energy.

[0007] When sharing energy, high power machines may be used and it may create opportunities for new workplaces, where work operation done earlier with human power is replaced machines.

[0008] Soldiers in the army can bring the individual power generation equipment and the storage unit, enabling them to be disconnected for a long time. When the soldiers are together they can dock the energy devices to the microgrid and create opportunities for e.g. cooking water

BRI EF DESCRI PTION OF THE DRAWI NGS

[0009] Fig. 101 illustrates an energy storage device in an exemplary embodiment of the invention.

[0010] Fig. 102 illustrates an energy storage device in an exemplary embodiment of the invention.

[0011] Fig. 103 illustrates an energy storage device in an exemplary embodiment of the invention.

EMBODIMENTS OF THE INVENTION

[0012] In the following description, various examples and embodiments of the invention are set forth in order to provide the skilled person with a more thorough understanding of the invention. The specific details described in the context of the various embodiments and with reference to the attached drawings are not intended to be construed as limitations. Rather, the scope of the invention is defined in the appended claims.

[0013] A wireless power transfer consist of a transmitter (tx) and a receiver (rx) with inductive coils, either resonant og non-resonant. As illustrated in Fig. 101, an energy storage device (e.g. battery) or generator device (e.g. solar panel) may be in a first modus transmitting and receiving low power and low voltage. The device consist of a generator (e.g. solar panel) 1003, the generator has an integrated or is connected with wire with a inductive wireless power transmitter 1002. The wireless power is transmitted to an energy storage device (e.g. battery) 1001. The energy storage device consists of both a wireless power receiver and transmitter. The power can be transmitted to the consumer 1004. The consumer has a wireless power receiver and can use the power directly or it charges a battery. The receiver can also have USB power outlet for charging USB devices

[0014] In a second embodiment, as illustrated in Fig. 102 and Fig. 103, a plurality of portable devices delivers (Tx)/receives (Rx) energy in a second modus transmitting and receiving a high power and high voltage to a receiver connected to a micro grid. Using different coil winding turn ratios, each individual storage and production device can deliver energy individually at low voltage/power mode and it can connect to a central micro grid for high voltage/power equipment. All power from or to the micro grid transmitter/receiver docking 1005 will be sent with AC or DC through a cabled connection to central sharing communication micro grid unit 1006 All received and sent data will be logged at the central sharing communication micro grid unit 1006. Fig. 103 also shows a central battery storage 1008, a central power generation unit 1007, and an AC to DC inverter 1009 enabling power sharing the regular consumer power grid 1010.

[0015] Individual house holdings can use the energy storage for light in the evening, the energy storage will be recharged with generator (e.g. solar panel) in the evening and morning. When the persons in the individual house holding go to work or school they may bring the portable energy storage and/or the generator. It ' s then connected to the micro grid central unit for recharging or energy transfer.

[0016] The central unit would typically be positioned at:

- a community hall,

- a school,

- a church,

- a working place or

- a cooking place where several house holding share the same cooking facilities.

[0017] When several production and storage units are connected, the available effect is high enough for typical 220/110V equipment.

[0018] Use of magnetic inductive power transfer, both resonant and non-resonant, as energy transfer methods enable an interface robust and reduced problems with human errors. The wireless power transfer has one or two way communication to regulate and ensure safe and reliable power transfer.

[0019] The wireless power transfer may also provide bi-directional data communication, enabling logging of used and delivered energy for each of the devices in an energy account. It enables opportunities to create incentives for creating energy. The energy account can be also be a marketplace for energy, resulting in possibility for people that are using less and produce more to sell surplus energy. The central unit will also be a user of energy and can be a buyer of the energy. In one example, block chain technology may be beneficial to use for the energy-sharing platform to keep track of the energy transfers. This is particularity useful if energy is delivered and received at several location.

[0020] In the exemplary embodiments, various features and details are shown in combination. The fact that several features are described with respect to a particular example should not be construed as implying that those features by necessity have to be included together in all embodiments of the invention. Conversely, features that are described with reference to different embodiments should not be construed as mutually exclusive. As those with skill in the art will readily understand, embodiments that incorporate any subset of features described herein and that are not expressly

interdependent have been contemplated by the inventor and are part of the intended disclosure. However, explicit description of all such embodiments would not contribute to the understanding of the principles of the invention, and consequently some permutations of features have been omitted for the sake of simplicity or brevity.

CLAIMS

1. System for wireless power sharing comprising a plurality of portable energy storage units comprising means for wireless power transfer for transmitting and/or receiving energy to or from a micro grid system.

2. System according to claim 1, wherein the energy storage units comprises an energy generator device.

3. System according to claim 2, wherein the energy production device is a solar panel or a micro-turbine.

4. System according to any of claims 1 - 4, wherein the means for wireless power transfer for transmitting and/or receiving energy is adapted to transmitting and/or receiving energy to/from low power and low voltage electrical equipment using magnetic inductive power transfer.

5. System according to claim 4, wherein the means for wireless power transfer for transmitting and/or receiving energy is adapted to transmitting and/or receiving energy to/from the micro grid with higher power and higher voltage using magnetic inductive power transfer.

6. System according to claim 5, wherein the higher power and higher voltage energy is shared to a central consumer and/or a plurality of other connected storage devices.

7. System according to claim 6, wherein the system further comprises a central control unit in the micro grid adapted to sending and receiving signals to the energy storage units for controlling the energy sharing between the plurality of portable energy storage units and the central storage unit.

8. System according to claim 7, wherein the central control unit adapted to predicting available power from the plurality of connected portable energy sources and to manage energy based on available connected energy and predicted generated energy.

9. System according to claim 8, wherein the input is basis for effective peak shaving and controlling the energy flow to ensure reliable energy flow is predicting available power with connected portable energy sources to plan for available energy including manage energy peak shaving. 10. System according to any of claims 1 - 9, further comprising a central sharing communication unit in the micro grid adapted to logging received and transmitted power providing an energy account for each owner of the plurality of portable energy storage and power generation unit.

11. System according to claim 10, wherein the data is transferred through the means for wireless power transfer, such as coils.

12. System according to claim 10, wherein the central sharing communication unit is adapted to communicate with a cloud service, such that each owner of the portable power storage and/or generation owner can earn and use energy credits.