Handle mechanism for a swappable and portable battery pack

Abstract

The disclosure herein generally relates to battery packs and more particularly to handle mechanism for swappable and portable battery packs. The handle mechanism (100-1500) facilitates easy lifting and carrying of the battery pack by a user. The handle mechanism is simple in construction and doesn't require more space. The handle mechanism allows the user to conveniently remove the battery pack from the vehicle or the swapping station, thus ensuring the safety of the battery packs in the field. The handle mechanism ensures that the handle can be positioned and locked at a convenient position by the user during swapping. The handle mechanism also ensure that the battery packs are handled safely during swapping and are hence less prone to any physical damage happening during the swap.

Description

HANDLE MECHANISM FOR A SWAPPABLE AND PORTABLE BATTERY PACKCROSS REFERENCE TO RELATED APPLICATIONThis application is based on and derives the benefit of Indian Provisional Application 202241056030, the contents of which are incorporated herein by reference.TECHNICAL FIELD

[0001] Embodiments herein generally relate to battery packs and more particularly to handle mechanisms for swappable and portable battery packs.BACKGROUND

[0002] Handles for portable battery packs have been known for decades. The handles are predominantly provided in larger and heavier battery packs for ease of handling and removing the portable battery packs from vehicles for replacement or repair purposes. The conventional handles are meant for a rare case use and most of the battery handles are not convenient to the user. Many electric vehicles of the present day are provided with portable battery mechanism wherein the driver of the vehicle gets to swap the depleted battery packs from the vehicle with charged battery packs from the battery swapping stations. Multiple numbers of such portable battery packs are stored in the battery swapping station. Unlike the conventional auxiliary battery packs in internal combustion engine-based vehicles, these battery packs are swapped very frequently by the user as this is the prime source of energy for powering the electric vehicles. Most of the battery swapping stations have battery packs with fixed handle structures for removal of battery packs from the swapping station and insertion into the vehicle. These battery packs are less in weight in comparison to the conventional auxiliary battery packs. However, as the battery is swapped frequently by the driver, there needs a user-friendly handle design which can aid the driver in easier removal of battery packs from the station and insertion to the vehicle.

[0003] Also, the conventional battery handles are rigid in construction which tends to get damaged over a period of time which calls for a complete replacement of the battery handle. The battery packs are also stored in battery swapping stations,battery charging stations, battery-carrying vehicles and battery-powered vehicles. The battery packs are used under rough conditions including rain, mud, dust, and extreme weather conditions. So, the conventional battery pack handles get damaged easily due to the rough use conditions.

[0004] Hence, there is a need in the art for a handle mechanism for swappable and portable battery packs that are easier to handle during swapping of the battery packs, easily replaceable or serviceable in case of damage to the handle, and ensure the safety / security of the battery packs.OBJECTS

[0005] The principal object of embodiments disclosed herein is to provide a handle mechanism for lifting and carrying swappable and portable battery packs.

[0006] Another object of the embodiments disclosed herein is to provide the handle mechanism for swappable and portable battery packs which is simple in construction and doesn’t require more space.

[0007] Yet another object of the embodiments disclosed herein is to provide the handle mechanism for allowing the user to conveniently remove the battery pack from the vehicle or the swapping station, thus ensuring the safety of the battery packs in the field.

[0008] Yet another object of the embodiments disclosed herein is to provide the handle mechanism which ensures that the handle can be positioned and locked at a convenient position by the user during swapping.

[0009] Yet another object of the embodiments disclosed herein is to provide the handle mechanism that ensures that the battery packs are handled safely during swapping and are hence less prone to any physical damage happening during the swap.

[0010] These and other objects of embodiments herein will be better appreciated and understood when considered in conjunction with the following description and accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changesand modifications may be made within the scope of the embodiments, and the embodiments herein include all such modifications.BRIEF DESCRIPTION OF DRAWINGS

[0011] The embodiments are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:

[0012] FIG. 1A depicts a perspective view of a handle mechanism for a battery pack in which torsion springs are disposed along a pivot axis of handles and is not visible outside, according to the first embodiments as disclosed herein;

[0013] FIG. IB and FIG. 1C depicts perspective views of the handle mechanism in a deployed position, according to the first embodiments as disclosed herein;

[0014] FIG. 2A and FIG. 2B depicts perspective views of a handle mechanism for a battery pack in which compression springs are disposed along a pivot axis of handles and are not visible outside, according to the second embodiments as disclosed herein;

[0015] FIG. 3 depicts a perspective view of the handle mechanism for a battery pack in which garter springs are connected to handles and a top cover of the battery pack, where the garter springs are not visible outside, according to third embodiments as disclosed herein;

[0016] FIG. 4A and FIG.4B depict perspective views of a handle mechanism for a battery pack in which torsion springs are disposed away from a pivot axis of handles, according to fourth embodiments as disclosed herein;

[0017] FIG. 5A and FIG.5B depict perspective views of a handle mechanism for a battery pack in which flat springs are disposed away from a pivot axis of handles, according to fifth embodiments as disclosed herein;

[0018] FIG. 6 depict perspective views of a handle mechanism for a battery pack in which disc magnets are affixed to handles and the top cover, according to sixth embodiments as disclosed herein;

[0019] FIG. 7A and FIG. 7B depicts a front view and a top view of a handle mechanism for a battery pack, wherein the handle mechanism includes electromagnets for securing the handle to the top cover of the battery pack, according to seventh embodiments as disclosed herein;

[0020] FIG. 8A and FIG. 8B depicts a perspective view of a removable handle mechanism for a battery pack, according to eight embodiments as disclosed herein;

[0021] FIG. 9A and FIG. 9B depicts a perspective view of a fixed handle mechanism for a battery pack, according to ninth embodiments as disclosed herein;

[0022] FIG. 10A and FIG. 10B depicts a perspective view of a slidable handle mechanism for a battery pack, according to tenth embodiments as disclosed herein;

[0023] FIG. 11A and FIG. 11B depicts a perspective view of a slidable handle mechanism for a battery pack, according to the eleventh embodiments as disclosed herein;

[0024] FIG. 12A and FIG. 12B depicts a perspective view of a handle mechanism for a battery pack with a single pivotable handle, according to the twelfth embodiments as disclosed herein;

[0025] FIG. 13A and FIG. 13B depicts a perspective view of a handle mechanism for a battery pack with dual pivotable handle, according to the thirteenth embodiments as disclosed herein;

[0026] FIG. 14 depicts a perspective view of a handle mechanism for a battery pack with a flexible handle, according to the fourteenth embodiments as disclosed herein; and

[0027] FIG. 15A and FIG. 15B depicts a perspective view of a handle mechanism for a battery pack with a slidable handle, according to fifteenth embodiments as disclosed herein.DETAILED DESCRIPTION

[0028] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

[0029] The embodiments herein achieve a handle mechanism for swappable and portable battery packs. The handle mechanism allows the user to conveniently remove the battery pack from the vehicle or the swapping station, thus ensuring the safety of the battery packs in the field. Referring now to the FIGs. 1 to 15B, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.

[0030] FIG. 1A-5B depicts perspective views of handle mechanisms (100, 200, 300, 400, 500) for a battery pack, according to first embodiments, second embodiments, third embodiments, fourth embodiments, and fifth embodiments as disclosed herein. In the first, second, third, fourth and fifth embodiments, the handle mechanism (100, 200, 300, 400, 500) includes a plurality of handles (102, 202, 302, 402, 502), a plurality of springs (104, 204, 304, 404, 504), a plurality of handle retainers (106, 206, 306, 406, 506) and a plurality of grip straps (108, 208, 408, 508).

[0031] The plurality of handles (102, 202, 302, 402, 502) are adapted to be pivotably connected to a top cover (12) of the battery pack. Each end of each handle (102, 202, 302, 402, 502) is pivoted to the top cover (12) through a pivot bush (not shown) and a pivot pin (not shown). One end of each spring (104, 204, 304, 404, 504) is connected to corresponding end of respective handle (102, 202, 302, 402, 502) and another end of each spring (104, 204, 304, 404, 504) is connected to the top cover (12). The plurality of springs (104, 204, 304, 404, 504) are adapted toauto-return the handles (102, 202, 302, 402, 502) back to its initial position upon releasing the handles (102, 202, 302, 402, 502) by the user. Each spring (104, 204, 304, 404, 504) is positioned internally or externally to the top cover (12) of the battery pack. Each spring (104, 204) is mounted along a pivot axis of the respective pivot pin. At least a portion of each spring (104, 204) is located inside the respective handle (102, 202) and the top cover (12) of the battery pack. In the first embodiment, each spring (104) is considered to be a torsion spring. In the first embodiment, the end of each spring (104) is connected to the corresponding end of the respective handle (102) at a pre-defined angle, wherein the predefined angle is at least 30°. In the second embodiment, each spring (204) is considered to be a compression spring. In the third embodiment, each spring (304) is considered to be a garter spring. In the fourth and fifth embodiments, each spring (404, 504) is mounted away from a pivot axis of the respective handle (402, 502) and is located external to the respective handle (402, 502) and the top cover (12) of the battery pack. In the fourth embodiment, each spring (404) is considered to be a torsion spring. In the fifth embodiment, each spring (504) is considered to be a flat spring. In the fourth and fifth embodiments, each spring (404, 504) is adapted to be concealed by a cover (not shown). Each handle retainer (106, 206, 306, 406, 506) is adapted to secure the respective end of handles (102, 202, 302, 402, 502) against the top cover (12). Each grip strap (108, 208, 408, 508) is disposed onto respective handles (102, 202, 302, 402, 502) to provide grip to the user’s hand while handling and lifting the battery pack.

[0032] FIG. 6 depicts perspective views of a handle mechanism (600) for a battery pack in which disc magnets (604, 606) are affixed to handles (602) and the top cover (22), according to sixth embodiments as disclosed herein. In the sixth embodiment, the handle mechanism (600) includes a plurality of handles (602), a plurality of first magnets (604), and a plurality of second magnets (606). The plurality of handles (602) is pivotably connected to the top cover (22) of the battery pack. For example, each end of each handle (602) is pivoted to the top cover (22) through a pivot bush (not shown) and a pivot pin (not shown). Each first magnet (604) is affixed to the corresponding end of the respective handle (602). Eachsecond magnet (606) is affixed to the top cover (22) of the battery pack and is located in the vicinity of the respective first magnet (604). Each first magnet (604) is facing the respective second magnet (606) in an opposite pole-facing manner at a predefined angle, wherein the predefined angle is at least 30°. The magnets (604, 606) are adapted to auto-return the handles (602) back to its initial position due opposite pole attraction of the magnets (604, 606) upon releasing the handles (602) by the user. At least a portion of each first magnet (604) is disposed of inside the corresponding end of the respective handle (602). At least a portion of each second magnet (606) is disposed of inside the top cover (22) of the battery pack. Each magnet (604, 606) is considered to be at least a circular- shaped permanent magnet.

[0033] FIG. 7A and FIG. 7B depicts a front view and a top view of a handle mechanism (700) for a battery pack, wherein the handle mechanism includes electro-magnets (704) for securing the handle (702) to the top cover (32) of the battery pack (30), according to seventh embodiments as disclosed herein. In the seventh embodiment, the handle mechanism (700) includes a handle (702), a plurality of electro-magnets (704), a spring (706), a control switch (not shown) and a switch cover (not shown). The plurality of electro-magnets (704) coupled to the handle (702). Each electro-magnet (704) is adapted to be selectively received by one of a plurality of electro-magnet receiving portions (32P) defined in the top cover (32) of the battery pack (30). One end of the spring (706) is connected to the handle (702) and another end of the spring (706) is connected to the top cover (32) of the battery pack (30). The spring (706) is adapted to restrict the release of the handle (702) from the top cover (32) when the electro-magnets (704) are deenergized to change the position of the handle (702) with respect to the top cover (32). The control switch is defined on the handle (702). The switch cover is adapted to cover the control switch. The control switch is adapted to switch ON electric current supply from the battery pack (10) to each electro-magnet (704) to facilitate selective engagement of each electro-magnet (704) with one of the plurality of electro-magnet receiving portion (32P) of the top cover (32) thereby locking the handle (702) with the top cover (32) of the battery pack (30). Each electro-magnet receiving portion (32P) is provided with a metallic material. The control switch isadapted to switch OFF electric current supply from the battery pack (30) to each electro-magnet (704) to change the engagement of each electro-magnet (704) with respect to the plurality of electro-magnet receiving portion (32P) of the top cover (32). The handle mechanism (700) increases the number of positions in which the handle (702) can be locked with the top cover (32) of the battery pack (30) by the user. The switch cover is adapted to cover the control switch to restrict accidental pressing of the control switch by the user.

[0034] FIG. 8A and FIG. 8B depicts a perspective view of a removable handle mechanism (800) for a battery pack (40), according to eight embodiments as disclosed herein. In the eighth embodiment, the handle mechanism (800) includes a removable handle (802) adapted to be removably connected to a top cover (42) of the battery pack (40). The removable handle (802) is adapted to be received by a groove (42P) defined in the top cover (40). In the eighth embodiment, the removable handle (802) defines external threads (not shown) adapted to be engaged with corresponding internal threads (not shown) defined on the groove (42P) of top cover (40) thereby removably connecting the removable handle (802) with the top cover (40). The removable handle (802) is adapted to be removably connected to the top cover (42) by using snap fit members or electric solenoids. In another eight embodiment, the handle mechanism (800) may comprise a lock and key mechanism, which facilitates the user to releasably lock the removable handle (802) to the top cover (42), thereby enabling to conveniently lift and carry the battery pack (40) by holding the removable handle (802). In the eighth embodiment herein, the handle (802) includes a handling portion (802H) to allow the user to conveniently grasp the handle (802). The removable handle (802) can be a separate component and stored at the battery swapping stations. In another eighth embodiment herein, the handle (802) can be made in any comfortable size for proper ergonomic grip for the user.

[0035] FIG. 9A and FIG. 9B depicts a perspective view of a fixed handle mechanism (900) for a battery pack (50), according to the ninth embodiments as disclosed herein. In the ninth embodiment, the handle mechanism (900) includes a handle (902) adapted to be fixedly connected to a top edge section of a top cover(52) of the battery pack (50). The user can hold the handle (902) and slide or pull the battery pack (50) from inside a storage cabinet or a storage compartment of a vehicle. In an embodiment herein, the handle (902) is provided with a slot (902S) to allow the user to conveniently grasp the handle (902) for lifting and carrying the battery pack (50).

[0036] FIG. 10A and FIG. 10B depicts a perspective view of a slidable handle mechanism (1000) for a battery pack (60), according to the tenth embodiment as disclosed herein. In the tenth embodiment, the handle mechanism (1000) includes a handle (1002). The handle (1002) includes a central base (1002B) and a plurality of arms (1002A). The plurality of arms (1002 A extends from the base (1002B). Each arm (1002A) is adapted to be one fixedly or slidably engaged with a corresponding corner edge groove (62G) of a top cover (62) of the battery pack (60). Each arm (1002 A) is adapted to be slidably engaged with the corresponding comer edge groove (62G) of the top cover (62) due to draft angles defined on the corresponding comer edge groove (62G). The handle (1002) substantially defines X shape configuration. Further, the handle mechanism (1000) includes a plurality of protrusions (1004). Each protrusion (1004) is defined on the corresponding corner edge groove (62G) to restrict the movement of the corresponding said arm (1002A) beyond a predefined position to restrict releasing of the handle (1002) from the top cover (62) while lifting the battery pack (60). In another tenth embodiment, if the arms (1002 A) of the handle (1002) is fixedly engaged with the corresponding corner edge groove (62G) of the top cover (62), then the central base (1002B) of the handle (02) is flexible so that the user can lift the battery pack by holding the central base (1002B) of the handle (1002).

[0037] FIG. 11A and FIG. 11B depicts a perspective view of a slidable handle mechanism (1100) for a battery pack (70), according to the eleventh embodiments as disclosed herein. In the eleventh embodiment, the handle mechanism (1100) includes a plurality of slidable handles (1102), a plurality of sliding pins (not shown), and a connecting band (1104). The plurality of slidable handles (1102) is adapted to be slidably connected to the top cover (72) of the battery pack (70). Each sliding pin is defined on the corresponding sliding handle(1102) and is slidably engaged with a pin receiving groove (72P) in the top cover (72). The slidable handles (1102) are adapted to be moved between one of a stowed position and a deployed position. The slidable handles (1102) are adapted to be received by a handle receiving groove (72G) of the top cover (72) when the slidable handles (1102) are in the stowed position. The connecting band (1104) is adapted to connect the slidable handles (1102) with each other.

[0038] FIG. 12A to FIG. 13B depicts a perspective view of a handle mechanism (1200, 1300) for a battery pack (80), according to the twelfth and thirteenth embodiments as disclosed herein. In the twelfth embodiment, the handle mechanism (1200) includes a single handle (1202, 1302). In the thirteenth embodiment, the handle mechanism (1300) includes a pair of handles (1302). Each end of the handle (1202, 1302) is pivotably connected to a top cover (82) of the battery pack (80). The handle (1202, 1302) is adapted to be moved between one of a stowed position and a deployed position. The handle (1202, 1302) is adapted to be received by a groove (82G) defined on the top cover (82) when the handle (1202, 1302) is in the stowed position.

[0039] FIG. 14 depicts a perspective view of a handle mechanism (1400) for a battery pack (90) with a flexible handle (902), according to the fourteenth embodiments as disclosed herein. In the fourteenth embodiment, the handle mechanism (1400) includes a flexible handle (1402) and a plurality of handle retainers (1404). Each handle retainer (1404) is affixed onto the corresponding end of the flexible handle (1402). The plurality of handle retainers (1404) is adapted to secure the flexible handle (1402) to a top cover (92) of the battery pack (90). The flexible handle (1402) is adapted to be received by a groove (92G) defined on the top cover (92).

[0040] FIG. 15A and FIG. 15B depicts a perspective view of a handle mechanism (1500) for a battery pack (95) with a slidable handle (1502), according to the fifteenth embodiments as disclosed herein. In the fifteenth embodiment, the handle mechanism (1500) includes a slidable handle (1502), a plurality of sliding handle retainers (not shown), and a plurality of springs (not shown). The handle mechanism (1500) facilitates easy lifting and carrying of the battery pack (95) by auser. The slidable handle (1502) includes a body (1502B) and a plurality of arms (1502A). Each arm (1502A) transversely extends from the body (1502B). Each arm (1502A) is adapted to be slidably engaged with an arm receiving portion (95Q) defined on the top cover (95T) of the battery pack (95). The slidable handle (1502) is adapted to be moved between one of a stowed position and a deployed position. The body (1502B) of the slidable handle (1502) is adapted to be received by a body receiving groove (95G) defined in the top cover (95T) when the sliding handle (1502) is in the stowed position. Each sliding handle retainer is affixed to the corresponding arm (1502A). Each end of the sliding handle retainer is adapted to be slidably engaged with a handle retainer receiving groove defined in the top cover (95T). One end of each spring is connected to the corresponding arm (1502A) and another end of each spring is connected to the top cover (95T). The plurality of springs are adapted to auto-retum the slidable handle (1502) back to its initial position (stowed position) upon releasing the slidable handle (1502) by the user.

[0041] The technical advantages of the handle mechanism (100-1500) are as follows. The handle mechanism allows the user to conveniently remove the battery pack from the vehicle or the swapping station, thus ensuring the safety of the battery packs in the field. The handle mechanism ensures that the handle can be positioned and locked at a convenient position by the user during swapping. The handle mechanism also ensures that the battery packs are handled safely during swapping and are hence less prone to any physical damage happening during the swap.

[0042] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and / or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of embodiments, those skilled in the art willrecognize that the embodiments herein can be practiced with modifications within the scope of the embodiments as described herein.

Claims

CLAIMSWe claim,1. A handle mechanism (100, 200, 300, 400, 500) for a portable and swappable battery pack, said handle mechanism (100, 200, 300, 400, 500) comprising: a plurality of handles (102, 202, 302, 402, 502) pivotably connected to a top cover (12) of said battery pack; and a plurality of springs (104, 204, 304, 404, 504), wherein one end of each of said spring (104, 204, 304, 404, 504) is connected to a corresponding end of respective said handle (102, 202, 302, 402, 502) and another end of each of said spring (104, 204, 304, 404, 504) is connected to said top cover (12).

2. The handle mechanism (100, 200, 300, 400, 500) as claimed in claim 1, wherein the plurality of said springs (104, 204, 304, 404, 504) are adapted to auto-return said handles (102, 202, 302, 402, 502) back to its initial position upon releasing said handles (102, 202, 302, 402, 502).

3. The handle mechanism (100, 200, 400, 500) as claimed in claim, wherein said handle mechanism (100, 200, 300, 400, 500) includes a plurality of handle retainers (106, 206, 306, 406, 506), wherein each of said handle retainer (106, 206, 306, 406, 506) is adapted to secure respective end of said handles (102, 202, 302, 402, 502) against said top cover (12).

4. The handle mechanism (100, 200, 300, 400, 500) as claimed in claim 1, wherein each of said spring (104, 204, 304, 404, 504) is positioned internally or externally to said top cover (12) of said battery pack.

5. The handle mechanism (100, 200, 300, 400, 500) as claimed in claim 4, wherein each end of each of said handle (102, 202, 302, 402, 502) is pivoted to said top cover (12) through a pivot bush and a pivot pin.

6. The handle mechanism (100, 200) as claimed in claim 5, wherein each of said springs (104, 204) is mounted along a pivot axis of respective said pivot pin; at least a portion of each of said springs (104, 204) is located inside respective said handle (102, 202) and said top cover (12) of said battery pack; and each of said springs (104, 204) is one of a torsion spring or a compression spring.

7. The handle mechanism (400, 500) as claimed in claim 5, wherein each of said springs (404, 504) is mounted away from a pivot axis of the respective said handle (402, 502) and is located external to respective said handle (402, 502) and said top cover (12) of the said battery pack; each of said springs (404, 504) is one of a torsion spring or a flat spring; and each of said springs (404, 504) is adapted to be concealed by a cover.

7. The handle mechanism (100) as claimed in claim 1, wherein said end of each of said springs (104) is connected to the corresponding end of the respective said handle (102) at a pre-defined angle, wherein the predefined angle is at least 30°.

8. The handle mechanism (300) as claimed in claim 4, wherein each of said springs (304) is at least a garter spring.

9. The handle mechanism (100, 200, 300, 400, 500) as claimed in claim 1, wherein handle mechanism (100, 200, 300, 400, 500) includes a plurality of grip straps (108, 208, 408, 508), wherein each of said grip straps (108, 208, 408, 508) is disposed onto respective said handle (102, 202, 302, 402, 502).

10. A handle mechanism (600) for a portable and swappable battery pack, said handle mechanism (600) comprising: a plurality of handles (602) pivotably connected to a top cover (22) of said battery pack; a plurality of first magnets (604), wherein each of said first magnet (604) is affixed to the corresponding end of the respective said handle (602); and a plurality of second magnets (606), wherein each of said second magnets (606) is affixed to said top cover (22) of said battery pack and is located in the vicinity of respective said first magnet (604).

11. The handle mechanism (600) as claimed in claim 10, wherein each of said first magnet (604) is facing respective said second magnet (606) in an opposite pole facing manner at a predefined angle; and said magnets (604, 606) are adapted to auto-return said handles (602) back to its initial position due opposite pole attraction of said magnets (604, 606) upon releasing said handles (602).

12. The handle mechanism (600) as claimed in claim 11 , wherein at least a portion of each of said first magnet (604) is disposed inside the corresponding end of the respective said handle (602); at least a portion of each of said second magnet (606) is disposed inside top cover (22) of the said battery pack; the predefined angle is at least 30°; and each of said magnets (604, 606) is at least a circular-shaped permanent magnet.

13. A handle mechanism (700) for a portable and swappable battery pack (30), said handle mechanism (700) comprising: a handle (702); a plurality of electro-magnets (704) coupled to said handle (702), wherein each of said electromagnet (704) is adapted to be selectively received by one of a plurality of electro-magnet receiving portion (32P) defined in a top cover (32) of said battery pack (30); and a spring (706), wherein one end of said spring (706) is connected to said handle (702) and another end of said spring (706) is connected to a top cover (32) of said battery pack (30).

14. The handle mechanism (700) as claimed in claim 13, wherein said handle mechanism (700) includes, a control switch defined on said handle (702); and a switch cover adapted to cover said control switch, wherein said control switch is adapted to switch ON electric current supply from said battery pack (10) to each of said electro-magnet (704) to facilitate selective engagement of each of said electro-magnet (704) with one of the plurality of electro-magnet receiving portion (32P) of said top cover (32) thereby locking said handle (702) with said top cover (32); each of said electro-magnet receiving portion (32P) is provided with metallic material; and said control switch is adapted to switch OFF electric current supply from said battery pack (30) to each of said electro-magnet (704) to change the engagement of each of said electromagnet (704) with respect to the plurality of electro-magnet receiving portion (32P) of said top cover (32).

15. A handle mechanism (800) for a portable and swappable battery pack (40), said handle mechanism (800) comprising: a removable handle (802) adapted to be removably connected to a top cover (42) of said battery pack (40).

16. The handle mechanism (800) as claimed in claim 15, wherein said removable handle (802) is adapted to be received by a groove (42P) defined in said top cover (40).

17. The handle mechanism (800) as claimed in claim 15, wherein said removable handle (802) defines external threads adapted to be engaged with corresponding internal threads defined on said groove (42P) of said top cover (40) thereby removably connecting said removable handle (802) with said top cover (40).

18. The handle mechanism (800) as claimed in claim 15, wherein said removable handle (802) is adapted to be removably connected to said top cover (42) by using snap-fit members or electric solenoids.

19. A handle mechanism (900) for a portable and swappable battery pack (50), said handle mechanism (900) comprising: a handle (902) adapted to be fixedly connected to a top edge section of a top cover (52) of said battery pack (50).

20. A handle mechanism (1000) for a portable and swappable battery pack (60), said handle mechanism (1000) comprising: a handle (1002), wherein said handle (1002) includes a central base (1002B) and a plurality of arms (1002A) extending from said base (1002B), wherein each of said arm (1002A) is adapted to be one of fixedly or slidably engaged with a corresponding corner edge groove (62G) of a top cover (62) of said battery pack (60).

21. The handle mechanism (1000) as claimed in claim 20, wherein each of said arm (1002A) is adapted to be slidably engaged with said corresponding corner edge groove (62G) of said top cover (62) due to draft angles defined on said corresponding corner edge groove (62G); and said handle (1002) substantially defines X shape configuration.

22. The handle mechanism (1000) as claimed in claim 20, wherein said handle mechanism (1000) includes a plurality of protrusions (1004), wherein each of said protrusion (1004) is defined on corresponding said corner edge groove (62G) to restrict a movement of corresponding said arm (1002A) beyond a predefined position to restrict releasing of said handle (1002) from said top cover (62) while lifting said battery pack (60).

23. A handle mechanism (1100) for a portable and swappable battery pack (70), said handle mechanism (1100) comprising: a plurality of slidable handles (1102) adapted to be slidably connected to a top cover (72) of said battery pack (70).

24. The handle mechanism (1100) as claimed in claim 23, wherein said handle mechanism (1100) includes a plurality of sliding pins, wherein each of said sliding pins are defined on the corresponding said sliding handle (1102) and is slidably engaged with a pin receiving groove (72P) in said top cover (72), wherein said slidable handles (1102) are adapted to be moved between one of a stowed position and a deployed position; and said slidable handles (1102) are adapted to be received by a handle receiving groove (72G) of said top cover (72) when said slidable handles (1102) are in said stowed position.

25. The handle mechanism (1100) as claimed in claim 23, wherein said handle mechanism (1100) includes a connecting band (1104) adapted to connect said slidable handles (1102) with each other.

26. A handle mechanism (1200, 1300) for a portable and swappable battery pack (80), said handle mechanism (1200, 1300) comprising: at least one handle (1202, 1302), wherein each end of said handle (1202, 1302) is pivotably connected to a top cover (82) of said battery pack (80), wherein said handle (1202, 1302) is adapted to be moved between one of a stowed position and a deployed position; andsaid handle (1202, 1302) is adapted to be received by a groove (82G) defined on said top cover (82) when said handle (1202, 1302) is in said stowed position.

27. A handle mechanism (1400) for a portable and swappable battery pack (90), said handle mechanism (1400) comprising: a flexible handle (1402); and a plurality of handle retainers (1404), wherein each of said handle retainer (1404) is affixed onto the corresponding end of said flexible handle (1402), wherein the plurality of said handle retainers (1404) is adapted to secure said flexible handle (1402) to a top cover (92) of said battery pack (90), wherein said flexible handle (1402) is adapted to be received by a groove (92G) defined on said top cover (92).

28. A handle mechanism (1500) for a portable and swappable battery pack (95), said handle mechanism (1500) comprising: a slidable handle (1502) having a body (1502B) and a plurality of arms (1502A), wherein each of said arm (1502 A) transversely extends from said body (1502B), wherein each of said arm (1502A) is adapted to be slidably engaged with an arm receiving portion (95Q) defined on a top cover (95T) of said battery pack (95).

29. The handle mechanism (1500) as claimed in claim 28, wherein said handle mechanism (1500) includes, a plurality of sliding handle retainers, wherein each of said sliding handle retainer is affixed to the corresponding arm (1502A), wherein each end of said sliding handle retainer is adapted to be slidably engaged with a handle retainer receiving groove defined in said top cover (95T); and a plurality of springs, wherein one end of each of said spring is connected to the corresponding arm (1502 A) and another end of each of said spring is connected to said top cover (95T), wherein said slidable handle (1502) is adapted to be moved between one of a stowed position and a deployed position;the plurality of said springs are adapted to auto-return said slidable handle (1502) back to its initial position (stowed position) upon releasing said slidable handle (1502); and said body (1502B) is adapted to be received by a body receiving groove (95G) defined in said top cover (95T) when said sliding handle (1502) is in said stowed position.

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