WO2025093113A1 - A power source for portable use - Google Patents

Abstract

There is provided an electrical power source system and a method for an electrical power source system. The electrical power source system includes a power source unit. The power source unit includes at least two of the following power source units: (1) a first power source unit, where the first power source unit is configured to generate electrical power from the thermal dissipation from a human body, using detectors, (2) a second power source unit, where the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding electromagnetic environment, using an antenna, and (3) a third power source unit (103), where the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment, using photoreceptor cells. The first power source unit, the second power source unit and the third power source unit are operable when located on or in proximity of the skin of a human body.

Description

A POWER SOURCE FOR PORTABLE USE

TECHNICAL FIELD

Embodiments presented herein relate to a power source for portable use, in general, and to an electrical power source configured to generate electrical power for portable use, in particular. Corresponding methods are also disclosed herein.

BACKGROUND

While forecasters predict that sales of mobile phones will saturate in the coming years, market research indicate that wearable devices will continue to grow. Modern wearable technology falls under a broad spectrum of usability such as smartwatches, sensors, biomedical applications, security and defence systems, clothing enhancements, entertainment devices, VR headsets, web- enabled glasses and Bluetooth headsets.

Some wearable devices are intended to be embedded inside clothing. Embedding the wearable devices inside a user’s clothing enables the user to access connectivity services provided by for example 4G/5G or WiFi communication while having his hands free.

Many of the portable electronic devices such as mobile phones are power supplied by a rechargeable battery. The availability of lasting battery power is a crucial point for portable electronic devices. Users always feel frustrated when a device is not available because of an empty battery, and a crucial service maybe disrupted. A user also has the hassle to recharge the battery by plugging the battery charger into a socket on a frequent basis, period during which the portable electronic device has often reduced functionality.

Lithium-ion batteries are a commonly used power source for portable electronic devices and in recent years the technology has matured providing longer battery life. Lithium-ion batteries however are relatively heavy weight, large size and rigid. Wearable devices normally are benefitting from having a small size and low weight because they are intended for portable use. However, the energy or power that a battery is capable of storing is closely linked to its size and weight. Thus, the necessary frequent charging and recharging of wearable devices for portable use is a challenge and there is need to provide compatible power-sources for wearable devices. Consumers often wish electronically wearable devices that are small volume, with long battery lifetime and to worry the least possible about recharging. For wearable devices a small form factor and a long battery life are directly in conflict with each other. Further, limited duration operations because of power source capacity limitations are a major hassle affecting user behaviours. Further solutions in this field are therefore desired.

SUMMARY

An object of embodiments herein is to provide a solution to the problems disclosed in the above.

According to a first aspect there is presented a method for an electrical power source system configured to provide power for portable use. The method includes generating power for portable use using at least two of the following three power sources: (1) a first power source unit, where the first power source unit is configured to generate electrical power from the thermal dissipation from a human body, using detectors, (2) a second power source unit, where the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding environment, using an antenna, and (3) a third power source unit, where the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment, using photoreceptor cells. The first power source unit, the second power source unit and the third power source unit are operable when located on or in proximity of the skin of a human body.

According to a second aspect there is presented an electrical power source system configured to provide power for portable use. The electrical power source system includes a power source unit. The power source unit includes at least two of the following power source units: (1) a first power source unit, where the first power source unit is configured to generate electrical power from the thermal dissipation from a human body, using detectors, (2) a second power source unit, where the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding environment, using an antenna, and (3) a third power source unit (103), where the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment, using photoreceptor cells . The first power source unit, the second power source unit and the third power source unit are operable when located on or in proximity of the skin of a human body.

In one aspect, the electrical power source system includes an analog signal mixer and rectifier unit, and an impedance matcher unit, where the analog signal mixer and rectifier unit and an impedance matcher unit are configured to receive power input from the power source unit and to output electrical current of amperes and volts for a portable use.

In one aspect, the electrical power source system, except detectors (104), antenna (105), and photocells (106), is included in a wearable device and is configured to provide power to the wearable device.

In one aspect, the providing power for portable use includes providing power for a wearable device.

Firstly, the electrical power source system for portable use allows a user to utilize the wearable device without having to worry about recharging the battery by plugging the battery in socket, or charging station, or that there is not enough battery while on longer trips away from any charging socket. The electrical power source system in the disclosed embodiments is self-sustained and charges the wearable device from energy in the surroundings such as body heat, light and electromagnetic radiation energy. Secondly, the electrical power source system also has a different form factor compared to conventional Lithium-ion batteries, for example, it could be smaller, light weight and more flexible allowing for different form factors for the wearable device for portable use.

Thirdly, the electrical power source system could be embedded in the clothing of the users, and that also allows the wearable device to be embedded in the clothing, leaving the user with his hands free to do other things.

Fourthly, the electrical power source system could be embedded inside the clothing of the human user, and this also allows the wearable device(s) to be embedded in or fixed to the clothing, leaving the user with his hands free to do other things.

Fifth, by exploiting at best their spatial distribution on the large surfaces of the human body or of the clothing for the distribution of the detectors, antenna, and photovoltaic cells, the electrical power source system maximizes the different energies collected and counterbalances the possibly low sensitivity of the individual detectors, individual antenna, and photovoltaic cells.

Sixth, the power supply system may have a modular and distributed architecture. Such distributed architectures have the advantage of increasing the combined reliability and maintainability of the portable powered devices, combining wearable devices with their portable power system according to the embodiments; this also reduces life-time end user costs. The distributed architectures furthermore increase the operational functionality, by facilitating up-to date technology compliance, ability to wash the clothing with embedded electrical power system or wearable device(s), and functional add-ons.

Other objectives, features and advantages of the enclosed embodiments will be apparent from the following detailed disclosure, from the attached dependent claims as well as from the drawings. Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the element, apparatus, component, means, module, step, etc." are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, module, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

BRIEF DESCRIPTION OF THE DRAWINGS

The inventive concept is now described, by way of example, with reference to the accompanying drawings, in which:

Fig. i schematically illustrates a wearable device for portable use according to some embodiments;

Fig. 2 schematically illustrate wearable devices for portable use according to some embodiments;

Figs. 3 illustrating a communications network according to some embodiments;

Fig. 4 schematically illustrates a portable power source system according to some embodiments;

Fig. 5 is a flowchart of methods according to some embodiments;

DETAILED DESCRIPTION

The inventive concept will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the inventive concept are shown. This inventive concept may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. Like numbers refer to like elements throughout the description. Any step or feature illustrated by dashed lines should be regarded as optional.

Figure i illustratively shows a wearable device or a device for portable use (1000) according to some embodiments disclosed herein. The wearable device includes a display (1001) which maybe touch-sensitive to enable user interaction. The wearable device may also include other means for user interaction such as user interfaces. A wearable device may be any kind of electronic device designed to be worn on or in proximity of the user's body. Such devices can take many different forms, including but not limited to smart-watches, biomedical applications, security and defence systems, clothing enhancements, entertainment devices, communications devices, VR/AR and headsets. Wearable devices maybe enabled for communication using 3G, 4G, 5G and/or any other future telecommunications standards. Wearable device may also be enabled for WiFi, Bluetooth or other any other short-range communication standard. Within the embodiments the term wearable devices and devices for portable use and portable use are interchangeably used.

In some embodiments the wearable device includes an electrical power source system (400). In other embodiments the electrical power source system is not included in the wearable device. The electrical power source system (400) is configured to provide power for portable use.

Within some embodiments disclosed herein the wearable device is embedded in the clothing. This is illustratively shown in Figure 2 where wearable devices are attached to, or embedded inside , various clothing (1002). Wearable devices embedded in, or mounted on , the clothing includes wearable devices that snapped on to the clothing, fixed internally or externally to the clothing, stored in pockets or wearable devices may also be part of the clothing. Wearable devices may be embedded in clothing of various types of clothes (1002) ranging from shoes, pants, shirts, jackets, hats, protective clothing or underwear but not limited thereto. These embodiments also cover wearable devices that are compatible with being embedded in the clothing, for example the wearable devices may be light weight and embedded in the clothing in such a way as not to affect the appearance of the clothes. In some embodiment wires connect the embedded electrical power supply system (400) to the wearable device(s) passing through the clothing or mounted onto flexible wire bands mounted onto the clothing.

In some embodiments the wearable devices have a modular and distributed architecture. The wearable devices may include removable or replaceable sub-devices, mainly electronic components, user interface or portable power supply system (400). Distributed architectures have the advantage of increasing the combined reliability and maintainability of the portable powered devices, combining wearable devices (1000) with their portable power system (400) according to the embodiments; this also increases lifetime and reduces end user costs. The distributed architecture furthermore increases the operational functionality, by facilitating up-to date technology compliance, washability of the clothing, and functional add-ons.

In some embodiments the wearable device (1000) includes a user interface (1001). The user wearing the clothes (1002) with the embedded wearable device (1000) and its portable power supply system (400) may interact with the wearable device using:

-buttons, earphone/mi crophone or equivalent, as well as other application specific interfaces where the buttons/s witches are embedded into the clothing, and can be placed at many locations: wrist, chest, gloves, belt, depending on the nature or usage of the clothing and accessibility requirements.

-a touch sensitive display which is an electronic sub-system, in some embodiments the touch-sensitive display is flexible/ curved and can be scratched or snapped onto clothing (typically on forearm), or which can be a separately powered large screen display connected by Bluetooth a graphic processor; - acoustic functions that can be either via a small set of speakers/mi crophones attached to the clothing, or a headset (wired/wireless), or wireless earphone plugs, or a headset with bone conduction for high surrounding sound environments;

-light-sensitivity, for example notifications triggered by LED diode light emission, e.g., on the arm, chest, wrist, or a vibration in the neck, or through the use of smart watch connectivity.

Fig. 3 is a schematic diagram illustrating a communications network (2000) where some embodiments of the wearable device (1000) and/or the portable electrical power supply system (400) presented herein can be applied. The communications network (2000) could be a third generation (3G) telecommunications network, a fourth generation (4G) telecommunications network, or a fifth (5G) telecommunications network and support any present or future telecommunications standard. The communications network could also be a WiFi network, a Bluetooth network or other short range communications network.

In some embodiments the communications network (2000) comprises a radio transceiver unit (2500) configured to, in a radio access network (2100), provide network access to a radio transceiver unit (2200) included in a user equipment (UE) such as a wearable device for portable use (1000). The radio access network (2100) is operatively connected to a core network (2300). The core network (2300) is in turn operatively connected to a service network (2400), such as the Internet. Radio transceiver unit (2200) is thereby, via radio transceiver unit (2500), enabled to access services of the service network (2400). A radio transceiver unit (2500) maybe, or maybe part of, a network node such as radio access network nodes, radio base stations, base transceiver stations, Node Bs, evolved Node Bs, g Node Bs, access points, access nodes, antenna integrated radios (AIRs), UEs, and transmission and reception points (TRPs). Radio transceiver unit (2500) provides network access in the radio access network (2100) by transmitting and receiving signals to radio transceiver unit (2200) in beams (2600). The radio transceiver unit (2500) may include a radio unit (2800) and an antenna unit (2700). The radio transceiver unit generates radio waves that forms signals for the communication networks (2000). The signals could be transmitted from the antenna unit (2700), forming part of a transmission point, of the radio transceiver unit (2500). Radio waves are generated by radio transmitters and received by radio receivers, using antennas. Radio waves are widely used in modern technology for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, wireless computer networks and many other applications. In communication networks, information is carried across space using radio waves. At the sending end, the information to be sent, in the form of a time-varying electrical signal, is applied to a radio transmitter. The information signal, formed by the radio wave, may be an audio signal representing sound from a microphone, a video signal representing moving images from a video camera, or a digital signal representing data from a computer but not limited thereto.

Wearable devices (1000) need a power source to charge the various components of the device such as transceivers, displays, electronics. The definition of a power source, or energy source, is a component for producing electricity. Power sources convert either energy sources such as potential, mechanical, thermal or chemical energy into electrical energy which is then used by the circuitry of a device to power that device. The electrical energy corresponds to an electrical current and voltage within the embodiments. Lithium-ion battery is a commonly used power source for portable electronic devices.

In the embodiments there is provided an electrical power source system (400) configured to provide power for portable use, i.e. to provide power for a wearable device (1000). Figure 4 illustratively shows a portable electrical power source system within some embodiments. The electrical power source system (400) includes units and components that are configured to generate an electrical current (300) that is used to power a wearable device (1000) , i.e. the generated current (300) is for portable use. Within the embodiments the power source (100) for portable use includes several different power sources (101-103), i.e. a combination of power sources that converts different energy sources into electrical energy. In some embodiments the power source unit (100) includes at least two of the following power sources: a first power source unit (101), where the first power source unit is configured to generate electrical power from the thermal dissipation from a human body, using detectors (104), a second power source unit (102), where the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding electromagnetic environment, using an antenna (105) and a third power source unit (103), where the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment, using photoreceptor cells (106).

In some embodiments the power source unit (100) includes the first power source (101), the second power source (102) and the third power source (103).

In some embodiments the first power source unit (101) converts thermal energy that is emitted from the body of the user of the wearable device to electrical energy. In an exemplary embodiment the thermal energy corresponds to energy dissipated by the body of the user. Depending on the activity and the environment, a human body dissipates between 290 and 3800 kilojoule of thermal energy per hour, translating to a power of 80-1050 Watts. In some embodiments the detectors (104) are thermoelectric devices or thermoelectric generators that generate electrical energy from thermal energy, for example low temperature thermal energy.

In some embodiments the detectors (104) include at least one of: (1) a single conductive metal wire, coated in three successive layers by chemical-vapor deposition (CVD) with a thermionic material such as Bi2Te3 or Bi2Se3, (2) a graphene layer doped with carbon isotopes, deposited as long lines onto polymer or composite, or (3) carbon nanotube (CNT) strips.

In some embodiments the second power source unit (102) converts electromagnetic radiation energy to electrical energy. Electromagnetic energy is radiant energy that travels in waves at the speed of light. It can also be described as radiant energy, electromagnetic radiation, electromagnetic waves, light, or the movement of radiation. Electromagnetic radiation can transfer heat or energy through matter, the atmosphere or in empty space. The electromagnetic energy is captured by antennas (105). An antenna captures the energy of electromagnetic radiation by converting the electromagnetic energy into electrical energy. The antennas include metal or other material designs that are designed to resonate with the frequency of the electromagnetic radiation. This resonance causes the electrons in the antenna to oscillate, creating an electrical current. The efficiency of an antenna in capturing electromagnetic radiation is determined by its ability to match the impedance of the incoming electromagnetic radiation to the impedance of the electrical circuit to which it is connected.

In some embodiments the antenna (105) includes at least one of: (1) a graphene layer doped with carbon isotopes, where the graphene layer is deposited as long lines onto polymers or composites, (2) thin isolated conductive wires in spirals configured around a stiff textile thread, where the spiral geometry is optimized for electromagnetic wave energy capture in all or parts of the 100 kHz- 23 GHz spectrum.

In some embodiments the third power source unit (103) converts sun or light from the surroundings to electrical energy. In some embodiments the photoreceptor cells (106) are photovoltaic cells. A photovoltaic cell maybe a semiconductor device that converts light energy directly to electrical energy. The embodiments herein are not limited to the photovoltaic cells being a semiconductor device, also other materials may be used for the photovoltaic cell. In some embodiments the photoreceptor cells (106) includes strips of graphene on silicon cladded polymer with M0S2 double interface film, achieving both a Schottky junction and a heterojunction. The layers are deposited by CVD.

In some embodiments the first power source unit, second power source unit and third power source unit are operable when located on or in proximity of the skin of a human body. For example, the power source units (101-103) may be embedded in the clothing of a user. That the power source units are embedded in the clothing may include the power source units attached to clothing, sawn into the clothing or that the power source units are incorporated in the clothing fabric or textile. The power source units (101- 103) may also be positioned in direct contact with the body of the user. One illustrative example is a smart-watch that is wrapped around the wrist, as illustratively shown in Figure 1.

Power source units (101), (102), (103) maybe positioned near the human body skin or inside textile covering parts of the human body, and in particular the stomach, the upper part of the back, the shoulders, the neck area, around the legs and in a hat. These body areas offer the best capture of body heat, light and electromagnetic energy.

In some embodiments the portable power system (400) supplies current and voltage (300) separately to the wearable device (1000) and its user interface (1001).

The portable power system (400) when it uses at least one of the power system units (100, 101,102) benefits from the large surfaces of the human body or its clothing; the detectors (101) have their sensitivity and output enhanced if localized on or near those larger parts of the body which dissipate most thermal energy (chest, back); the antennas (102) have their sensitivity and spectral ranges extended if spanning on the widest parts of the human body (chest, back, shoulders, round the legs); the photovoltaic detectors (103) see their generated power grow with surface and high placed locations on the body or its clothing (back, hats, etc). Furthermore, the use of wide parts of the human body or its clothing, by increasing the sensitivity of the antennas (102) enhances the range of wearable communicating devices, allowing for better connectivity in rural and low telecom coverage areas.

In terms of their power generation time profile, the first power source unit is maybe permanent when operated on or in proximity of the skin of a human body, the second power source is maybe permanent but location dependent, and the third power source is intermittent when operated in the same way. In this way, the power generated by the power source (100) is enhanced and stabilized for use in the different environments in which the said human finds himself. The same power source system (400) can provide power and energy to one or several wearable devices carried by the same person; the designation “device(s)” refers to the case where several wearable devices are used, possibly with different functionality and design.

In some embodiments the portable electrical power source unit (400) includes an analog signal mixer and rectifier unit (200), and an impedance matcher unit (202), as illustratively shown in Fig. 4. The analog signal mixer and rectifier unit (200), and an impedance matcher unit 202 are configured to receive power input from the power source unit (100) and to output electrical current (300) of amperes and volts for a portable use. In some embodiments the analog signal mixer and rectifier unit (200) is an electrical circuit that creates a new analog signal with a certain frequency from two or more signals applied to it. Thus, in some embodiments, the analog signal mixer and rectifier unit (200) combines the signals from the power sources units (101-103) and converts the alternating signal current (AC), which periodically reverses direction, to a direct current (DC). The output from the analog signal mixer and rectifier unit (200) is the input to the impedance matcher (202) that adjust the impedance of the signal before outputting the electrical current (300) for portable use.

In some embodiments the output of the signal mixer and rectifier unit (200) is the input to a waveform shaper unit (201), or the input of a buffer solid- state energy accumulator unit (203) configured to supplement the electrical power flow from signal mixer and rectifier unit (200) to the impedance matcher unit (202). In some embodiments the waveform shaper modifies the shapes of output from the analog signal mixer and rectifier unit (200).

The waveform shaper unit (201) and the parallel buffer solid-state energy accumulator unit (203) temporarily supplement the direct electrical power flow from the analog signal mixer and rectifier unit (200) to the impedance matcher unit (202). In some embodiments, the parallel buffer solid-state energy accumulator unit (203) maybe a supercondensator, or a lithium-ion accumulator with its loading circuitry.

In some embodiments the analog signal mixer and rectifier unit (200) includes at least three parallel inputs. The three parallel inputs accepts arrivals of at least two of the three power source unit (101-103) outputs and provides as output one single electrical current and voltage to the impedance matcher unit (202) and/or to the waveform shaper unit (201) and/or buffer solid-state energy accumulator unit (203).

In some embodiments, the impedance matcher (202) and analog mixer and rectifier (200) may have their respective positions interchanged in Figure 4.

In some embodiments the connections between the power source units (101- 103) and the analog signal mixer and rectifier unit (200) include insulated conductive wire possibly embedded into strips of textile, plastic, composite or metal laminate providing some flexibility but also stiffness compatible with their placement on or near the human body or its clothing.

In some of the embodiments the units (101-103), (104-106), (200-203) may be unmounted and remounted inside or onto a clothing or any wearable natural or synthetic textile or composite surface, and can be unplugged from, for example the analog signal mixer and rectifier (200), to allow for reuse, change and washing of the clothing or textile. Fig. 5 is a flowchart illustrating embodiments of methods for an electrical power source system configured to provide power for portable use. The method includes generating power for portable use using at least two of the following three power sources: (1) a first power source unit 101, where the first power source unit is configured to generate electrical power from the thermal dissipation from a human body using detectors (104), (2) a second power source unit 102, where the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding electromagnetic environment using an antenna (105), and (3) a third power source unit 103, where the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment using photoreceptor cells (106). The first power source unit, the second power source unit and the third power source unit are operable when located on or in proximity of the skin of a human body.

The inventive concept has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the inventive concept, as defined by the appended patent claims.

Claims

1. An electrical power source system (400) comprising a power source unit (100) configured to provide power for portable use, the power source unit (100) comprising at least two of the following power source units: a first power source unit (101), wherein the first power source unit is configured to generate electrical power from the thermal dissipation from a human body using detectors (104). a second power source unit (102), wherein the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding environment, using an antenna (105). a third power source unit (103), wherein the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment, using photoreceptor cells (106), wherein the first power source unit, second power source unit and third power source unit are operable when located on or in proximity of the skin of a human body.

2. The electrical power source system of claim 1, further comprising an analog signal mixer and rectifier unit (200), and an impedance matcher unit (202), wherein the analog signal mixer and rectifier unit (200), and an impedance matcher unit (202) are configured to receive power input from the power source unit (100) and to output electrical current (300) of amperes and volts for a portable use.

3. The electrical power source system of claim 1, wherein the electrical power source system is devised to be embedded into, or mounted onto textile, plastic or composite clothing.

4. The electrical power source system of claim 2, wherein the generated electrical current (300) is used by a wearable device carried on the human body or clothing.

5. The electrical power source system of claims 1 and 2, wherein the output of the signal mixer and rectifier unit (200) is the input to a waveform shaper unit (201), or the input of a buffer solid-state energy accumulator unit (203) configured to supplement the electrical power flow from signal mixer and rectifier unit (200).

6. The electrical power source system of claims 1-5, wherein the power source unit (100), the analog signal mixer and rectifier unit (200), the waveform shaper unit (201) and the impedance matcher unit (202) are configured for portable use.

7. The electrical power source system of claim 1-6, wherein the power source unit (100), the analog signal mixer and rectifier unit (200), the waveform shaper unit (201) and the impedance matcher unit (202) are configured to be comprised in a wearable device.

8. The electrical power source system of claim 1-7, wherein the power source unit (100), the analog signal mixer and rectifier unit (200), the waveform shaper unit (201), the impedance matcher unit (202) are configured to provide power for a wearable device.

9. The electrical power source system of claim 1, wherein the detectors (104) comprise at least one of:

-single conductive metal wire, coated in three successive layers by chemical-vapor deposition, CVD, with a thermionic material such as Bi2Te3 or Bi2Se3;

-graphene layer doped with carbon isotopes, deposited as long lines onto polymer or composite; or

-carbon nanotube (CNT) strips.

10 The electrical power source system of claim 1, wherein the antenna (105) comprises at least one of: -graphene layer doped with carbon isotopes, wherein the graphene layers are deposited as long lines onto polymers or composites; or -thin isolated conductive wires in spirals configured around a textile thread, wherein the spiral geometry is optimized for electromagnetic wave energy capture in all or parts of the 100 kHz- 23 GHz spectrum.

11. A method for an electrical power source system (400) configured to provide power for portable use, the method comprising: generating (600) power for portable use using at least two of the following three power sources: a first power source unit (101), wherein the first power source unit is configured to generate electrical power from the thermal dissipation from a human body, using detectors (104), a second power source unit (102), wherein the second power source unit is configured to generate electrical power from the electromagnetic radiation energy present in the surrounding environment, using an antenna (105), a third power source unit (103), wherein the third power source unit is configured to generate electrical power from the sun or light energy present in the local lighting environment, using photoreceptor cells (106), wherein the first power source unit, second power source unit and third power source unit are devised to be located on or in proximity of the skin of a human body.

12. The method of claim 11, wherein the power source system further comprises an analog signal mixer and rectifier unit (200), and an impedance matcher unit (202), wherein the analog signal mixer and rectifier unit (200), and an impedance matcher unit (202) are configured to receive power input from the power source unit (100) and to output electrical current

13 The method of claims 12, wherein the output of the signal mixer and rectifier unit (200) is the input to a waveform shaper unit (201), or the input of a buffer solid-state energy accumulator unit (203) configured to supplement the electrical power flow from signal mixer and rectifier unit (200) .

14. The method of claims 11-13, wherein the power source unit (100), the analog signal mixer and rectifier unit (200), the waveform shaper unit (201) and the impedance matcher unit (202) are configured for portable use.

15. The method of claims 11-14, wherein the power source unit (100), the analog signal mixer and rectifier unit (200), the waveform shaper unit (201), the impedance matcher unit (202) are configured to be comprised in a wearable device.

16. The method of claims 11-15, wherein the power source unit (100), the analog signal mixer and rectifier unit (200), the waveform shaper unit (201), the impedance matcher unit (202) are configured to provide power for the wearable device.