SYSTEMS

FIELD OF THE INVENTION

[0001] The present invention is in the field of wireless charging in general, and in particular it is directed to a novel battery pack module that allows to convert any standard battery powered device to a wirelessly chargeable device and further to improve the charging efficiency.

BACKGROUND

[0002] Many electrical devices require the use of battery power. Various attempts have been made at providing for wireless charging of batteries in electronic devices, but existing attempts require the manufacture of a specialized system. In addition, some solutions require disassembly of the device to implement an additional electrical component or circuit, along with soldering or other advanced electrical connection means, to modify a device so that it can support wireless charging. However, this approach is cumbersome and falls outside the skill level of many users. Thus, there remains an unmet need for the ad hoc conversion of battery powered electrical devices, using typical form factors such as AAA, AA, C, D and other common household batteries.

[0003] Wireless charging systems and wireless charging devices are well known in the art. Some examples of such charging systems and devices that are using electromagnetic energy for charging are described in detail in international patent publications Nos. WO 2013/118116, WO 2013/ 179284, WO 2015/022690 and WO 2015/145451 of the same inventor all incorporated herein by reference.

[0004] Wireless charging systems exploit propagation of energy by a radio frequency (RF) electromagnetic field between a transmitting unit and a receiving unit, which may be embedded in a chargeable device or may be coupled to such a device when it is required to charge it. The receiving unit has to cope with varying power levels in the electromagnetic field and with varying distances to the transmitting unit. The basic condition for successful and efficient charging in all wireless charging systems based on electromagnetic radiation transmission is to achieve high coupling and high transfer efficiency between the transmitting probe and the receiving probe, i.e. between the transmitting unit of the wireless charging device and the receiving unit of the rechargeable electrical device (the device under charge; denoted herein after:“DUC”). For different DUCs variety of charging devices may be practices to better suit the specific DUC. Thus, the charging process can be performed in a closed wireless charging device, semi closed charging device, or an open e surface. In all variations, there is a constant need for increasing the stability of the RF signal uptake to thereby improve the charging efficiency.

[0005] High coupling between the transmitting probe and a receiving probe is usually obtained in stable unchanging systems where the position and location of the probes are fixed. However, in wireless charging systems, there is a need to allow a certain amount of flexibility and freedom of movement between the transmitting component and the receiving component, so as to maintain high transfer efficiency between the probes regardless of the position and orientation of the chargeable device, since a user may position the device under charge onto/within the wireless charging device in each charging session in a different position and/or orientation.

[0006] When using a single probe, the ground plat of the receiving unit is used as a RF ground to the receiving probe. However, this ground is usually significantly small compared to the receiving probe and thus, any environmental changes are influencing the electromagnetic field lines distribution between the transmitting unit Tx and the receiving unit Rx, i.e. the sensitivity of the receiving probe as to changes in its position and/or orientation is high, resulting in high instability and low charging efficiency.

[0007] The sensitivity of a single probe to elements around it is further enhanced when charging is conducted in a close/partially close conductive structure. In such scenario, the charging system is usually designed to obtain high coupling and to have high efficiency of energy transfer at certain position of the transmitting probe relative to the receiving probe as the receiving probe is referenced to specific ground point in the charging system. Upon changing the position and/orientation of the DUC within the charging zone, the steady state of the wireless charging system as designed is breached as the interaction of the receiving probe with the elements around it, such as but not limited to, the walls of the conductive charging device and the transmitting probe changes. This change breach the conditions required to obtain high coupling between the transmitting and the receiving units as the electromagnetic field lines distribution between the receiving probe and the RF ground are being change and interact with other elements in the surrounding, and consequently, the transfer efficiency between the units significantly decreases.

[0008] In WO 2015/145451 of the same inventor, a novel probes arrangement is provided that is configured and operable to improve the stability and the flexibility of the coupling between the charging device and the device under charge by enhancing the stability of the RF coupling between the transmitting and the receiving units and maintaining high transfer efficiency between the units, in a dynamic charging system where the position and the orientation of the device under charge changes from one charging session to the other. The present invention takes the probe arrangement described therein one step forward by using a battery shield as part of the receiving antenna as will be described in detail herein below.

[0009] However, despite the aforementioned advancement and understanding of wireless charging, there remains to exist an ad hoc conversion for wireless charging of an existing battery system for typical electronic devices that use form factor batteries, such as AAA, AA, C, D and other form factors known in the art.

SUMMARY OF INVENTION

[0010] The present invention provides for a novel battery pack module an electrical device powered by disposable non-chargeable battery/batteries into a wireless RF rechargeable electrical device wireless radiofrequency (RF) rechargeable device. It is intended that the battery back module can be inserted into the battery compartment of an electrical device, and thus making the electrical device capable of being wirelessly recharged as a result of receiving transmitted RF signals and wirelessly charging a battery capable for powering the device. [0011] The present invention further provides for a battery pack module which provides an ad hoc interface with an electrical device, that allows for the wireless RF charging of the batteries in the system.

[0012] One aspect of the present invention is to allow for the use of ad hoc rechargeable batteries and to use such rechargeable batteries to convert the device to be charged as part of a wireless charging system.

[0013] It is another aspect of the present invention to provide for a housing for a receiving unit for a rechargeable electrical device, which incorporates a battery and probe such that the battery, when receiving propagation of energy by a radio frequency electromagnetic field between a transmitting unit of a wireless charging device and a receiving unit connected to the battery of the rechargeable device, is within a charging zone and becomes wirelessly charged.

[0014] The terms“rechargeable electrical device”,“device to be charged”,

“device under charge” and“DUC” are all directed to the electrical device comprising the battery pack module and are used herein interchangeably.

[0015] In accordance with embodiments of the invention, the receiving unit comprises RFin terminal, DCout terminal and Ground terminal.

[0016] The novel battery pack of the invention may be implemented as a single battery or as a battery array. In some optional embodiments each battery is connected to a dedicated receiving unit (Rx), while in some other embodiments the receiving unit Rx may be connected to more than one battery. When more than one battery is used, the connection of the batteries may be a serial connection or a parallel connection.

BRIEF DESCRIPTION OF THE DRAWING

[0017] Examples illustrative of embodiments of the disclosure are described below with reference to figures attached hereto. In the figures, identical structures, elements or parts that appear in more than one figure are generally labeled with the same numeral in all the figures in which they appear. Dimensions of components and features shown in the figures are generally chosen for convenience and clarity of presentation and are not necessarily shown to scale. Many of the figures presented are in the form of schematic illustrations and, as such, certain elements may be drawn greatly simplified or not-to-scale, for illustrative clarity. The figures are not intended to be production drawings. The figures (Figs.) are listed below.

[0018] FIG. 1 is a schematic illustration of a standard AA battery

[0019] FIGS. 2A-2H are schematic illustrations of optional examples of AAA battery with the battery pack module of the invention;

[0020] FIG. 3A is a schematic illustration of a standard button battery;

[0021] FIGS. 3B-3C are schematic illustrations of optional examples of a button battery with the battery pack module of the invention.

[0022] It should be clear that the description of the embodiments and attached

Figures set forth in this specification serves only for a better understanding of the invention, without limiting its scope. It should also be clear that a person skilled in the art, after reading the present specification could make adjustments or amendments to the attached Figures and above described embodiments that would still be covered by the present invention.

DESCRIPTION OF VARIATIONS OF THE INVENTION

[0023] In the following description, various aspects of a novel battery pack for wireless charging of battery/batteries of an electrical device will be described. Most generally, the novel battery pack comprises a battery housing of a larger dimension such as AA battery comprising a smaller size battery such as AAA battery connected to a Receiving unit with a rectifier and at least one probe, wherein, the second probe is the battery cell itself that functions as a second probe. The battery pack module provided herein may be used mutatis mutandis for creating any wireless rechargeable battery size and shape according to the needs based on the same concept presented herein. For the purpose of explanation, specific configurations and details are set forth in order to provide a thorough understanding of the apparatus.

[0024] Although various features of the disclosure may be described in the context of a single embodiment, the features may also be provided separately or in any suitable combination. Conversely, although the disclosure may be described herein in the context of separate embodiments for clarity, the disclosure may also be implemented in a single embodiment. Furthermore, it should be understood that the disclosure can be carried out or practiced in various ways, and that the disclosure can be implemented in embodiments other than the exemplary ones described herein below. The descriptions, examples and materials presented in the description, as well as in the claims, should not be construed as limiting, but rather as illustrative. Terms for indicating relative direction or location, such as“right” and“left”,“up” and“down”, “top” and“bottom”,“horizontal” and“vertical”,“higher” and“lower”, and the like, may also be used, without limitation.

[0025] The following detailed description is merely exemplary in nature and is in no way intended to limit the scope of the invention, its application, or uses, which may vary. The invention is described with relation to the non-limiting definitions and terminology included herein. These definitions and terminology are not designed to function as a limitation on the scope or practice of the invention but are presented for illustrative and descriptive purposes only.

[0026] As used herein, the term“probe” refers to, and includes, any element capable of transmitting and/or receiving electromagnetic energy, including without limitation, conductive wires, conductive strips, and proprietary and off the shelf antennas.

[0027] As used herein, the term "charging zone" refers to a volume/space inside a closed/semi-closed/flat housing in which a charging process is to occur and in which a device to be charged is to be located. The transfer of the electromagnetic radiation from a transmitting probe located in the housing is configured to create a maximal radiation volume, at times referred hereinbelow as maximal energy volume (MEV), at a certain location inside the housing, i.e., a volume in which the electromagnetic radiation is of substantially maximal intensity.

[0028] In one main aspect the invention is directed to a battery pack module for conversion of an electrical device powered by disposable non-chargeable battery/batteries into a wireless RF rechargeable electrical device, the battery pack module comprising: (a) at least one rechargeable battery having a positive terminal and a negative terminal; (b) at least one receiving unit having at least one Radio Frequency in (RFin) terminal , at least one Direct Current out (DCout) terminal, and at least one ground (GND) terminal, wherein said at least one GND terminal of the receiving unit is in electrical contact with said negative terminal of said at least one battery, and said at least one DCout terminal is in electrical contact with said positive terminal of the at least one battery; (c) at least one probe, wherein said at least one probe is in electrical contact with said RFin terminal of said at least one receiving unit; and (d) at least one housing of sufficient size for holding said at least one battery, at least one receiving unit, and at least one probe, wherein said housing has at least one positive terminal that is in electrical contact with the positive terminal of said battery, and at least one negative terminal that is in electrical contact with said at least one negative terminal of said housing.

[0029] The electrical contact of the negative terminal of the rechargeable battery with the at least one GND terminal of the receiving unit, functionally increases the dimensions of the total ground plane of the battery pack module relative to the ground of the receiving unit. The enlargement of the ground functionally stabilizes the RF energy reception by the probe, and consequently, the increased stability results in improved charging efficiency.

[0030] In a further embodiment and in order to further enlarge the ground plane, the electrical contact of the negative terminal of the battery with the at least one GND terminal of the receiving unit may be further electrically connected with a ground terminal of the rechargeable electrical device. For example, it can be connected with the electrical wires of the rechargeable electrical device, with the electrical boards (PCB) of the rechargeable device, with MEMS (Microelectromechanical systems), and with any other electrical components, in order to enlarge the ground plane and increase stability.

[0031] In a further embodiment, the present invention is directed to a battery pack module for a wireless RF charging device, the battery pack module comprising: at least one rechargeable battery, said battery having at least one positive terminal and at least one negative terminal; at least one receiving unit, said receiving unit having at least one positive terminal and at least one negative terminal, wherein said at least one negative terminal of said receiving unit is in electrical connection with at least one negative terminal of said at least one battery; at least one probe, wherein said at least one probe is in electrical connection with at least one positive terminal of said at least one receiving unit; and at least one housing of sufficient size for holding said at least one battery, at least one receiving unit, and at least one probe, wherein said housing has at least one positive terminal and at least one negative terminal, wherein said at least one positive terminal of said housing is in electrical connection with said at least one positive terminal of said battery, and said at least one negative terminal of said at least one battery is in electrical connection with said at least one negative terminal of said housing.

[0032] The battery pack module provided herein, may further comprise at least one battery terminal extension for electrically connecting said housing to said at least one battery. When the dimensions of the battery are substantially different from the dimensions of the housing, there is a need for at least one terminal extension in order to electrically connect between the terminals of the battery and the terminals of the housing. In such case, the battery terminal extension is in electrical connection with at least one positive terminal of the housing and with the positive terminal of the battery. Additionally, the battery terminal extension is in electrical connection with at least one negative terminal of the housing and the negative terminal of the battery.

[0033] The receiving unit preferably comprises at least one rectifier.

[0034] The battery dimensions may change, however, in all variations the dimensions of the battery are a t least a bit smaller than the dimensions of the housing. In a non-limiting example, the battery may be AAA rechargeable battery, and the housing may be in the size of an AA battery. In further examples, the length of the battery may be similar to the length of the housing and they may only differ in the diameter and in some other examples, the high may differ while the diameter of the battery and the housing may be similar. In cases where there is partial overlap or there is no overlap between the terminals of the battery and the terminals of the housing, the battery will have a terminal extension to compensate for the differences in the sizes and allow for electrical connection between the battery and the housing. [0035] In some embodiments, the battery may comprise a shielding element that serves as a second probe, such that the probe and the shielding element function together as an antenna arrangement as mentioned in the above.

[0036] In some optional embodiments, the probe may have one of the following configurations: (i) a conductive wire having an“L” shape; (ii) a linear conductive wire; (iii) a conductive wire having a descending“L” shape that becomes circular in a manner that it encompasses said battery; (iv) a conductive strip positioned at the side wall of said battery; (v) a plurality of conductive wires; (vi) a plurality of conductive strips; or (vii) combinations thereof.

[0037] The receiving unit may be positioned in various locations. Some non limiting examples are positioning of the receiving unit on the upper side of the battery; positioned on the wall side of the battery; or positioned on the bottom side of the battery.

[0038] In a further aspect of the invention, a battery pack module for conversion of an electrical device powered by disposable non-chargeable battery/batteries into a wireless RF rechargeable electrical device is provided. The battery pack module comprises: a) at least one rechargeable battery having a positive terminal and a negative terminal and wherein, said battery pack module having size smaller than a housing to be inserted into it; b) at least one receiving unit having at least one Radio Frequency in (RFin) terminal, at least one Direct Current out (DCout) terminal, and at least one ground (GND) terminal, wherein said at least one GND terminal of said receiving unit is in electrical connection with said negative terminal of said at least one battery; c) at least one probe, wherein said at least one probe is in electrical connection with at said RFin terminal of said at least one receiving unit; d) at least one battery terminal extension for electrically connecting a housing to said at least one battery; and e) at least one housing of sufficient size for holding said at least one battery, at least one receiving unit, at least one battery terminal extension, and at least one probe, wherein said housing has at least one positive terminal and at least one negative terminal, said at least one positive terminal of said housing is in electrical connection with said positive terminal of said battery, and said negative terminal of said at least one battery is in electrical connection with said at least one negative terminal of said housing. [0039] In this embodiment, the battery terminal extension is preferably in electrical connection with the positive terminal of the housing and the positive terminal of the battery, and further in electrical connection with the negative terminal of the housing and the negative terminal of the battery.

[0040] The receiving unit further comprises at least one rectifier. In a specific non-limiting example, for the same reasons mentioned above, when the battery is a AAA size rechargeable battery, the housing preferably has the size of an AA battery.

[0041] In some other specific embodiment, the rechargeable battery comprises a shielding element that serves as a second probe, such that the at least one probe and the shielding element function as an antenna arrangement.

[0042] In some optional examples, the probe has one of the following structures: (i) a conductive wire having an“L” shape; (ii) a linear conductive wire; (iii) a conductive wire having a descending“L” shape that becomes circular in a manner that it encompasses said battery; (iv) a conductive strip positioned at the side wall of said battery; (v) a plurality of conductive wires; (vi) a plurality of conductive strips; or (vii) combinations thereof.

[0043] In one further aspect, this invention is directed to a method for providing a wireless RF rechargeable battery pack conversion for an electrical device powered by disposable non-wirelessly rechargeable battery/batteries, the method comprising: (a) providing at least one housing having at least one positive terminal and at least one negative terminal, said housing having sufficient size for holding (i) at least one rechargeable battery having a positive terminal and a negative terminal, (ii) at least one receiving unit having at least one Radio Frequency in (RFin) terminal, at least one Direct Current out (DCout) terminal, and at least one ground (GND) terminal, and (iii) at least one probe; (b) electrically connecting said at least one GND terminal of the receiving unit with said negative terminal of said at least one housing, and said at least one DCout terminal is in electrical contact with said positive terminal of the at least one housing; (c) electrically connecting said at least one probe with said RFin terminal of said at least one receiving unit; (d) inserting at least one rechargeable battery into said housing and closing said housing wherein upon closing, at least one positive terminal of the housing is in electrical contact with the positive terminal of said battery, and at least one negative terminal of the battery is in electrical contact with said at least one negative terminal of said housing; (e) inserting said housing into a battery compartment of said electrical device; and (f) positioning said electrical device into or onto a conductive RF charging device to thereby charge the at least one rechargeable battery.

[0044] In the method described above, the at least one housing may further comprise a battery terminal extension for electrically connecting the housing to said at least one battery and wherein, said battery terminal extension is in electrical connection with said at least one positive terminal of said housing and said at least one positive terminal of said at least one battery when a rechargeable battery is inserted into the housing.

[0045] The battery terminal extension is preferably in electrical connection with said at least one negative terminal of said housing and said at least one negative terminal of said at least one battery when a rechargeable battery is inserted into the housing. In a non-limiting example, the battery used is AAA rechargeable battery, and the housing is the size of an AA battery.

[0046] In summary, the present invention is aimed to provide for a battery pack module for a wireless radiofrequency (RF) charging device. It is intended that the battery back module can be inserted into the battery compartment of a particular electrical device, and thus making the electrical device capable of being wirelessly recharged as a result of receiving transmitted RF signals and wirelessly charging a battery capable for powering the device. The battery pack module provided herein may be used for devices where the consumer can replace it and turn the device to be wirelessly rechargeable, or it can be provided with devices that the manufacturer integrates it within the device, without the need to re-design the battery compartment of the device.

[0047] Further embodiments of the inventive battery pack module are provided hereinbelow in the detailed description of this invention. In at least one embodiment, the receiving unit further includes at least one rectifier. Additionally, the invention further includes at least one housing of sufficient size for holding the battery, receiving unit, and probe. [0048] It should be appreciated that embodiments of the present invention are intended to act as replacements for existing batteries commonly used in electronics and toys. Thus the sizing of the housing includes those sizes fitting within form factors for AAA batteries, AA batteries, C batteries, D batteries, 9-volt batteries, pill batteries, hearing aid batteries, watch batteries, and other form factors for batteries known in the art. Embodiments allow for smaller batteries, in combination with the system components, to be included in the housing to provide a form factor for a larger battery. In at least one non-limiting example, the rechargeable battery is a AAA battery and the housing is a AA battery, where the AAA battery along with the receiving unit, probe(s), and optional battery terminal extension, are in electrical contact with the housing to provide an electrically sufficient AA battery for fitting in the battery tray of an electrical device taking AA batteries.

[0049] In addition, each housing includes at least one positive terminal and at least one negative terminal, where the at least one positive terminal of the housing is in electrical contact with the at least one positive terminal of the battery, and the at least one negative terminal of the at least one battery is in electrical contact with the at least one negative terminal of the housing.

[0050] In some embodiments of the present invention, the inventive battery pack module further includes a battery terminal extension for electrically contacting the housing to the at least one battery. This allows the use of batteries of smaller size to be used in conjunction with the receiving units, probes, and internal to the larger housing to complete the electrical connection to the housing, thus that the battery pack module acts electrically as a battery of sufficient size for a particular electronic device. In at least one embodiment, the battery terminal extension is in electrical contact with the at least one positive terminal of the housing and the at least one positive terminal of the at least one battery. In at least one embodiment, the battery terminal extension is in electrical contact with the negative terminal of the housing and the negative terminal of the battery. It is appreciated that where a plurality of terminals or plurality of components exist that one or more connection between the one or more terminals of the system components may be made. [0051] It should be appreciated that one advantage of the present invention is that the shielding element of the battery serves as a second probe, such that the at least one probe and the shielding element function as an antenna arrangement.

[0052] It is appreciated that the probes may be of any conductive material and shape known in the art. However, it should be further appreciated that some shapes provide a better conductive coupling conductivity than others. Probe arrangements for the present invention, include, at least, (i) a conductive wire having an“L” shape; (ii) a linear conductive wire; (iii) a conductive wire having a descending“L” shape that becomes circular in a manner that it encompasses the battery; (iv) a conductive strip positioned at the side wall of the battery; (v) a plurality of conductive wires; (vi) a plurality of conductive strips; or (vii) combinations thereof.

[0053] It is further appreciated that placement of the receiving unit along with the probes may provide advantages such as optimizing the charging zone or improving charging coupling or reducing impedance changes based on the placement of the receiving unit relative to the battery and the probe. It is further appreciated that placement of the receiving unit within a housing may further depend on the shape or type of probe used. Thus, in some embodiments, the receiving unit is (i) positioned on the upper side of the battery; (ii) positioned on the wall side of the battery; or (iii) positioned on the bottom side of the battery.

[0054] In accordance with embodiments of this invention a battery shield is being used as part of a receiving antenna for wireless charging system. More specifically, FIG. 1 is a schematic illustration of a standard AA battery 50 having predefined dimensions with height“h” and diameter“d”, and a positive (+) terminal at one end and negative (-) terminal at the other end.

[0055] FIGS. 2B-2F are schematic illustrations of various optional examples of a battery pack module 100 comprising AAA battery having dimensions with height “hl” and diameter“dl” that are smaller than dimensions“h” and“d”. In some other embodiments, only one dimension, either” hl” or“dl” can be smaller than“h” or“d”. The AAA battery is connected with at least a rectifying unit and packed in an AA battery pack and further packed in a battery cover of AA battery. In more details and referring to the drawings, battery pack module 100 comprises at least one AAA rechargeable cell 120 that have a positive terminal 143 and a negative terminal 142. Rechargeable battery 120 may function as a second probe/ground for RF energy uptake as illustrated in FIG 3C. Battery pack module 100 further comprise a receiving unit 170 having at least a rectifier. Receiving unit 170 comprising a RFin terminal 172 from which the RF signal is inserted by a prob 140, a DCout terminal 171 from which the DC power is communicated into the positive terminal of rechargeable battery 120, and Ground terminal 173 which is electrically connected to the negative terminal 142 of rechargeable battery 120. Battery pack module 100 further comprise a probe 140 for receiving the transmitted RF energy. Probe 140 is electrically connected to the RFin terminal 172 of receiving unit 170. Optionally, the battery pack module 100 further comprise a battery terminal extension 130 to insure close of the electric circuit in the original size battery housing 110, and a battery housing 110 suitable for AA battery size. A battery terminal extension is needed when the high and diameter of the rechargeable battery 120 are smaller than the dimensions of housing 110, and there is no contact between the terminals. In some embodiments, only one terminal extension is needed, while in some other embodiments more than one battery terminal extension are used, while in some further embodiments no battery terminal extension is needed. The battery terminal extension 130 comprising a positive extension 131 that is electrically connecting the positive terminal 111 of housing 110 and positive terminal 143 of rechargeable battery 120, and further a negative extension 132 that electrically connects the negative terminal 112 of housing 110 with negative terminal 142 of rechargeable battery 120. In accordance with embodiments of this invention, the rechargeable battery 120 shield is being used as part of the receiving antenna together with probe 140. In this manner, the invention is making use of an existing conductive shielding element 120 of the rechargeable battery cell to serve as a second probe and extended ground to probe 140 such that both probes function as an antenna arrangement. By this way, the inventor reduces the number of the additional elements that are required for the wireless charging receiver. In other words, in accordance with this invention, a regular AA battery cell shield may be converted into a wireless rechargeable AAA battery cell without changing the battery chamber of the device, in a none expensive and highly efficient manner. In these drawings, the position of receiving unit 170 as well as the shape and position of probe 140 vary. [0056] In FIG. 2A probe 140 is a conductive wire having an“L” shape and the receiving unit 170 is positioned on the upper side of the AAA rechargeable cell 120.

[0057] In FIG. 2B probe 140 is a conductive wire having a circular shape and the receiving unit 170 is positioned on the upper side of the AAA rechargeable cell 120.

[0058] In FIG. 2C probe 140 is a conductive wire having a descending“L” shape part that becomes circular in a manner that it encompasses the AAA rechargeable cell wall 120 and receiving unit 170 is positioned on the upper side of the AAA rechargeable cell 120 at the same location as in FIGS. 2A-2B.

[0059] In FIG. 2D probe 140 is a linear conductive wire, and the receiving unit

170 is positioned on the wall side of the AAA rechargeable cell 120.

[0060] In FIG. 2E probe 140 is a conductive wire having a descending“L

“shape and receiving unit 170 is positioned on the wall side of the AAA rechargeable cell 120.

[0061] In FIG. 2F probe 140 is a conductive strip positioned at the side wall of

AAA rechargeable cell 120 and a receiving unit 170 positioned on the wall side of the AAA rechargeable cell 120.

[0062] FIG. 2G and FIG. 2H illustrate a battery pack array having two batteries, wherein FIG. 2G is a standard AA battery 50 having predefined dimensions with height“h” and diameter“d”, and a positive (+) terminal at one end and negative (-) terminal at the other end similar to the single battery illustrated in FIG.l where the two batteries are positioned in opposite orientation (serial connection).

[0063] FIG. 2H illustrates one optional example of a battery pack array module

100 comprising two AAA batteries having dimensions with height“hl” and diameter “dl” that are smaller than“h” and“d”, each is connected with at least a rectifying unit 170 and packed in an AA battery pack 120 covered by a cover of AA batteryllO. In this specific example the probes 140 and the receiving unit 170 are in a similar shape and position as in FIG. 2B. [0064] FIG. 3A shows a standard button battery cell 70 while FIG. 3B shows battery pack module 200 comprising a smaller size rechargeable battery cell 120 having a positive terminal 143 and a negative terminal 142; a receiving unit 170 having a DCout terminal 171, an RFin terminal 172, and a ground terminal 173; a probe 140 ; a housing 110 having a positive terminal 111 and a negative terminal 112 in a size all the components of the battery pack module 200, and battery terminal extension 130 having a single terminal extension 132 for connecting between the DCout terminal 171 of the receiving unit 170 and the positive terminal 143 of rechargeable battery 120.

[0065] FIG 3C illustrates a specific embodiment of battery pack module 200 that has similar components and electrical connections as illustrated in FIG. 2B with a different prob comprising a first probe 140 and a second probe 140’. In this manner, the invention is making use of an existing conductive shielding element 120 of the rechargeable battery cell to serve as a second probe and extended ground to probe 140 such that both probes function as an antenna arrangement. The antenna arrangement and the extended ground plane enhance the stability of the receiving probe and therefore results in improved charging efficiency as explained above. In these figures, it is one again demonstrated how a regular button battery cell may be transformed with a wireless rechargeable battery cell, without any burden on the user and without the need to change the entire device to be charged. The battery pack module 200 further comprises, a battery terminal extension 130 to insure closure of the electric circuit in the original size battery housing 110, and a battery housing 110 suitable for the original battery size. The two conductive wires shown in FIG 3C. create a probe arrangement as illustrated in detail in WO 2015/145451 of the same inventor, a novel probes arrangement is provided that is configured and operable to improve the stability and the flexibility of the coupling between the charging device and the device under charge by enhancing the stability of the RF coupling between the transmitting and the receiving units and maintaining high transfer efficiency between the units, in a dynamic charging system where the position and the orientation of the device under charge changes from one charging session to the other, by the unique structure and the effect obtained by connection 180 between the ground (GND) of the receiving unit to the ground (GND ) of the battery. [0066] It should be clear that the description of the embodiments and attached

Figures set forth in this specification serves only for a better understanding of the invention, without limiting its scope. It should also be clear that a person skilled in the art, after reading the present specification could adjust or amend to the attached Figures and above described embodiments that would still be covered by the present invention.