Description:TECHNICAL FIELD
[0001] The present subject matter relates to an energy storage device. More particularly, heat dissipation in the energy storage modules is disclosed. The present application is a patent of addition with respect to the patent application number IN202241017709.
BACKGROUND
[0002] Existing research in battery technology is directed to rechargeable energy storage devices, such as sealed batteries, starved electrolyte batteries, lead/acid batteries. Rechargeable energy storage devices are commonly used as power sources in different applications, such as, vehicles and the like. However, the lead-acid batteries are heavy, bulky, have short cycle life, short calendar life, and low turn around efficiency, resulting in limiting the applications of the lead-acid batteries.
[0003] The problems associated with conventional energy storage devices including the lead-acid batteries, are overcome in lithium-ion batteries, as they provide an ideal system for high energy-density applications. Also, the lithium-ion batteries have advantages over conventional energy storage devices, such as improved rate capability, and safety of the system in which the battery is incorporated and the human handling it. Further, the rechargeable energy storage devices, such as lithium-ion batteries exhibit one or more beneficial characteristics which makes the lithium-ion batteries useable for battery powered devices. Firstly, for safety reasons, the lithium-ion battery is completely constructed using solid components, while still retaining flexibility and compactness. Secondly, the energy storage devices including the lithium-ion battery exhibit similar conductivity characteristics like that of primary batteries with liquid electrolytes, i.e., deliver high power and energy density with low rates of self-discharge. Thirdly, the lithium-ion battery is capable of being readily manufactured in a reliable and cost-efficient manner. Also, the energy storage devices including the lithium-ion batteries can maintain a necessary minimum level of conductivity at sub-ambient temperatures that makes the lithium-ion batteries reliable in varied operating temperatures.
[0004] In a known structure for the energy storage device, one or more energy storage cells including lithium-ion battery cells are disposed in at least one holder structure in series and parallel combinations, using at least one interconnecting structure. The interconnecting structure is adapted for electrically interconnecting the energy storage cells with a battery management system (BMS).
BRIEF DESCRIPTION OF DRAWINGS
[0005] The detailed description is described with reference to the accompanying figures. The same numbers are used throughout the drawings to reference like features and components.
[0006] Figure. 1 exemplarily illustrates an elevation view of general assembly of energy storage device.
[0007] Figure. 2 exemplarily illustrates a top perspective exploded view of the energy storage device.
[0008] Figure. 3 exemplarily illustrate an exploded perspective view of sub-assembly of energy storage device.
[0009] Figure. 4 exemplarily illustrates a top perspective view of an energy storage module.
[00010] Figure. 5 exemplarily illustrates an inner side of at least one part of the holder.
[00011] Figure 6 exemplarily illustrates a top perspective view of an energy storage module.
[00012] Figure 7 exemplarily illustrates a top perspective exploded view of an energy storage module with casing.
[00013] Figure 8 exemplarily illustrates a bottom perspective view of a top cover.
[00014] Figure 9 exemplarily illustrates a bottom perspective view of a top cover with enmolded metal sleeve.
[00015] Figure 10 exemplarily illustrates a top exploded view of an energy storage device.
[00016] Figure 11 exemplarily illustrates a top perspective view of an energy storage device.

DETAILED DESCRIPTION OF THE INVENTION
[00017] Energy storage device may be used in driving electric vehicles or hybrid electric vehicles. The energy storage device comprises one or more energy storage cells, such as, lithium-ion battery cells enclosed within a casing.
[00018] In such energy storage devices, dust, and water ingression into the energy storage device the potential to affect the safety and performance of the complete energy storage device. Powerful water jets, splashing, spraying, and dripping water on the energy storage device as well as immersion of the energy storage device in water can allow the water to enter inside the energy storage device. This may be due to reasons such as improper sealing of the energy storage device, etc. Water, dust etc. entering the energy storage device creates a risk of short circuit in cell, causing cell failure. Therefore, when cell failure occurs due to short circuits, the cells typically release considerable quantity of hot gases. Since usually the energy storage device includes packs of multiple cells stacked together, the hot gases generated due to short circuit of a cell have the capability of impacting the integrity of the neighbouring cells in the energy storage device and cause substantial damage to the other functional cells along with other critical components, placed in proximity of the failed cells.
[00019] The heat thus generated during short circuit of the cell can cause thermal runaway having potential of damaging the complete energy storage device. Water and dust ingression in energy storage devices is to be avoided as water getting into a cell of an energy storage device can disrupt the flow of electrons from the positive to negative terminal, causing the short-circuit and failure. If an immediate short circuit is avoided, water as well as dust will still lead to corrosion causing eventual failure of the energy storage device. Improper sealing between top cover and casing of the energy storage device is the leading reason allowing water and dust ingression.
[00020] Energy storage devices have weight constraints in many of their applications and thus need the use plastic material in the body as well as in the covers. Metal covers made of aluminium or steel are used to dissipate heat from the energy storage device in certain applications having requirement of passive cooling. Thus, there are metal-plastic, plastic-plastic and metal-metal interfaces in the energy storage devices based on their functionality, applications, and operating conditions. Metal-metal interfaces do not face many issues for sealing as the flatness can be in the range of 0.1 mm which can be sealed properly with the use of liquid sealants. But in the case of plastic-metal interfaces, the sealing is a major issue as for plastic parts manufactured using injection moulding do not provide flatness in the range required for interfaces to have proper sealing.
[00021] Conventionally some known arts suggest usage of rubber gaskets between plastic top cover and metal casings which may face damage during assembly. In some known arts, fastening means along with rubber gaskets are utilized but do not have high sustainability as they tend to get cut with time and do not provide proper sealing pressure. Thus, the existing known arts fail to provide a mechanism providing high sealing pressure while also providing sustainability.
[00022] There exists a need for providing an energy storage device with a sealing mechanism between top cover and casing which is capable of avoiding damage during assembly and operation, provides high sealing pressure while also aids in adhering to the weight requirements.
[00023] The present subject matter is an improvement over the patent application number IN202241017709, herein called as ‘the application’. The application discloses about an energy storage device, comprising a casing with one or more energy storage module. The one or more energy storage module includes one or more cells configured to be disposed within one or more holder. The one or more holders includes one or more parts, for example a first part and a second part. Each of the one or more part of the one or more holders includes one or more accommodating feature. The one or more accommodating feature is dedicated for accommodating at least one end of each cell of the one or more energy storage device and the accommodating feature includes a shielded portion and an open portion. The negative terminal of each cell is provided on the outer periphery of least one end of each cell, and the positive terminal is encircled by the negative terminal.
[00024] The subject matter in the application aid in providing safe and secured packaging of the cells within a holder of an energy storage device. This is because the accommodating feature of the holder, always ensures that, the contact between the positive terminal and negative terminal of the cell is eliminated. Furthermore, the shielded portion prevents welding of the engaging portion of the interconnector, on the wrong area of the cell. Altogether, it aids in eliminating the risk of short circuiting.
[00025] However, a sealing mechanism between top cover and casing which can avoid damage during assembly while also providing high sealing pressure and sustainability is not achieved in this arrangement.
[00026] Hence, there is a need of addressing the above circumstances and problems of the known arts.
[00027] The present subject matter has been devised in view of the above circumstances as well as solving other problems of the known art. To prevent occurrences of such above stated untoward events, in the existing structures of the energy storage device, a metal-metal contact between cover and casing with a liquid sealant between the metal-metal contact between the top cover and the casing is to be provided.
[00028] The present subject matter discloses in an embodiment, an energy storage device comprising a casing, one or more cover and one or more energy storage module. The one or more energy storage module includes one or more cells configured to be disposed within one or more holder.
[00029] The casing includes a first casing and a second casing. The first casing is configured to support a front portion of the one or more cells. The second casing is configured to support a back portion of the one or more cells. The top periphery of the first casing and the second casing is provided with one or more first mounting provisions. The bottom periphery of the first casing and the second casing is provided with one or more second mounting provisions.
[00030] In a preferred embodiment, the first casing and the second casing are made of metal.
[00031] A top cover is configured to cover the energy storage module from a top portion of the energy storage module. The interfacing surface of the top cover is provided with one or more third mounting provisions corresponding to the one or more first mounting provisions. One or more metal sleeve in the shape of the interfacing surface of the top cover is enmoulded in the top cover. The metal sleeve is provided with holes corresponding to the third mounting provisions provided in the top cover. In a preferred embodiment, the top cover is a plastic casing.
[00032] The bottom cover is configured to support the one or more energy storage modules from a bottom portion. The interfacing surface of the bottom cover is provided with one or more fourth mounting provisions corresponding to the one or more second mounting provisions.
[00033] In an embodiment, the casing and the bottom cover can be metal casings.
[00034] The metal sleeve provides a flat surface with low tolerance. The top cover being a plastic part can be easily enmoulded with the metal sleeve during manufacturing.
[00035] In the present embodiment, one or more energy storage module management system is detachably attached within the top cover of the energy storage module with one or more fastening means.
[00036] One or more port and one or more sockets are provided in the top cover to bring out the connection to the outside of the energy storage device from the energy storage module management system.
[00037] The one or more holders includes one or more parts, for example a first part and a second part. Each of the one or more part of the one or more holders includes one or more accommodating feature.
[00038] The one or more accommodating feature is dedicated for accommodating at least one end of each cell of the one or more energy storage module, ensuring that the contact between a positive terminal and a negative terminal of each cell of the one or more cells is being eliminated.
[00039] The one or more energy storage module is to be sealed completely from all sides. A sealant is applied on the interfacing surfaces on the casing and the top cover. The sealant is applied using a suitable method such as spraying, brushing, or injecting, and is allowed to cure for a predetermined period. The sealant may be a curable material such as an epoxy, silicone, or polyurethane, or any other suitable material.
[00040] The one or more energy storage module is then enclosed between the bottom cover, the casing, and the top cover. The top cover configured to cover the energy storage module from a top portion is fastened to the top periphery of the casing using a plurality of second fastening means that correspond to the mounting provisions. The bottom cover configured to support the energy storage module from bottom portion of the energy storage is fastened to the bottom periphery of the first and the second casing. The fastening is obtained by using fasteners The top and bottom covers are fastened to the casing using a plurality of second fastening means that correspond to the mounting provisions. These fastening means pass through the corresponding mounting provisions, ensuring a sturdy fit.
[00041] In an embodiment, the casing is formed by fastening the first and second casings together using a plurality of first fastening means.
[00042] The metal sleeve provides a flat surface with low tolerance and provides a sealing surface with low tolerance between the top cover and the casing after fastening. Low tolerance at the metal-metal contact provided by the metal sleeve and casing ensure a tight fit between the top cover and the casing. Low tolerance surface is useful for sealing because it provides a more precise and consistent surface for the sealing material to adhere to. When the surface is flat and has low tolerances, the sealing material can spread evenly and form a tighter seal, preventing any gaps or leaks. This is particularly important in applications where a high degree of sealing is required, such as in the case of energy storage devices. This tight fit, in turn, helps to prevent the ingress of any contaminants or foreign matter into the energy storage module.
[00043] By using a low tolerance surface, the energy storage device can be sealed more effectively, ensuring that the internal components are protected from external factors and that the device operates safely and efficiently.
[00044] The sealant and the tight fit provided using a metal sleeve together provides a hermetic seal that prevents the entry of any external contaminants or moisture into the energy storage device. This ensures the longevity and reliability of the device and protects it from damage due to environmental factors.
[00045] The top cover configured to cover the energy storage module from a top portion is fastened to the top periphery of the casing. The bottom casing configured to cover the energy storage module from bottom portion of the energy storage is fastened to the bottom periphery of the casing. The fastening is obtained by using fasteners.
[00046] Exemplary embodiments detailing features regarding the aforesaid and other advantages of the present subject matter will be described hereunder with reference to the accompanying drawings. Various aspects of different embodiments of the present invention will become discernible from the following description set out hereunder. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. It should be noted that the description and figures merely illustrate principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter.
[00047] Figure 1 exemplarily illustrates a side perspective view of an energy storage device 100, in accordance with an embodiment of the present subject matter. Herein energy storage device 100 includes an energy storage device 100. The energy storage device 100 comprises of one or more energy storage module 100a (shown in Figure 3), a casing 101, a top cover 133 and a bottom cover 134. The casing 101, top cover 133 and bottom cover 134 protects the one or more energy storage module 100a from external factors, such as environmental factors, and prevents the one or more energy storage module 100a from getting damaged. The one or more energy storage module 100a, includes one or more cells 105 (shown in Figure 2) disposed in one or more holder 104 (shown in fig.3) to hold the cells 105 together in a pre-defined position. The holder 104 holds the individual cells 105 and the joint output of all the cells 105 are transferred to a channel through bus bars. The holder 104 also ensures maintaining the required cell 105 arrangement and adequate cell 105 spacing. The one or more cells 105 provide the electric energy to drive a vehicle (not shown).
[00048] The holder 104 is provided with one or more voltage sensing points 112 (shown in Figure 2) for one or more interconnectors 106 (shown in Figure 2) to be placed. The one or more interconnectors 106 are used to make electrical connection between the one or more cells 105 by means of the one or more voltage sensing points 112. The one or more cells 105 are welded to the interconnector 106 to form the energy storage module 100a. The one or more interconnectors 106 are placed above the one or more energy storage module 100a and the voltage sensing points 112 are provided on the energy storage device module 100a to hold the one or more interconnectors 106 in place.
[00049] Figure 2 exemplarily illustrates a top perspective exploded view of the energy storage device 100, in accordance with an embodiment. In the present embodiment, the casing 101 includes a first casing 101a and a second casing 101b. The first casing 101a is configured to support a front portion of the one or more cells 105. The second casing 101b is configured to support a back portion of the one or more cells 105. A top cover 133 is configured to cover the energy storage module 100a from a top portion of the energy storage module 100a. A bottom cover 134 provided is configured to support the one or more energy storage modules 100a from a bottom portion. In an embodiment, the one or more casing 101 can be an aluminium casing. In the present embodiment, one or more energy storage module management system is detachably attached within the top cover 133 of the energy storage module 100a with one or more fastening means (not shown). A secondary port 118 and a socket 120 are provided in the top casing 133 to bring out the connection to the outside of the energy storage device 100 from the energy storage module management system.
[00050] Figure 3 exemplarily illustrates a perspective exploded view of the energy storage device 100, in accordance with an embodiment.
[00051] Figure 4 exemplarily illustrates a top perspective view of an energy storage module 100a, in accordance with an embodiment of the present subject matter. The energy storage module 100a includes the holder 104. The holder 104 is provided with one or more voltage sensing points 112 (shown in Figure 2) for one or more interconnectors 106 (shown in Figure 2) to be placed. The holder 104 includes one or more parts, i.e., a first part 104a, and a second part 104b. Both the first part 104a and the second part 104b align together in parallel and hold the cells 105 (shown in Figure 2) therebetween.
[00052] Figure 5 exemplarily illustrates an inner side of at least one part (104a, 104b) of the holder 104, in accordance with an embodiment of the present subject matter. Each of the holder 104 includes one or more accommodating feature 107 dedicated for accommodating at least one end of each cell 105 of the energy storage module 100a. The present subject matter aid in providing safe and secured packaging of the cells within the holder 104 of the energy storage device 100. This is because the accommodating feature 107 of the holder 104, always ensures that, the contact between a positive terminal 105b (shown in Figure 5) and a negative terminal 105a (shown in Figure 5) of the cell 105 is eliminated.
[00053] In an embodiment, the accommodating feature 107 is a ring-shaped structure.
[00054] Each part (104a, 104b) of the holder 104 includes a plurality of first mounting provisions 109, and a plurality of second mounting provisions 110. The plurality of first mounting provisions 109, and the plurality of second mounting provisions 110 together aid in aligning the two parts (104a, 104b) of the holder 104 in parallel. The plurality of first mounting provisions 109, and the plurality of second mounting provisions 110 ensure tight packaging of the cells 105 within the two parts (104a, 104b) of the holder 104.
[00055] Each accommodating feature 107 includes an open portion 107a and a shielded portion 107b. At least one end of each cell 105 of the energy storage device 100, includes the negative terminal 105a (shown in Figure 6) and the positive terminal 105b (shown in Figure 6). The negative terminal 105a is usually present on the outer periphery of least one end of each cell 105. The positive terminal 105b is encircled by the negative terminal 105a. The shielded portion 107b covers the negative terminal 105a of the cell. The open portion 107a acts as an opening to expose the positive terminal 105b of the cell 105. Between each accommodating feature 107 of the one of the parts (104a, 104b), a plurality of inward protruded restrictors 107c are provided. The open portion 107a, the shielded portion 107b, and the restrictors 107c, together function as a locator for each cell 105 and thus aid in easy assembly of the cells 105 within the holder 104. These restrictors 107c ensures that each cell 105 is restricted to respective accommodating feature 107 of each part (104a, 104b) of the holder 104. Thus, ensuring tight packaging of the cells 105 within the two parts (104a, 104b) of the holder 104.
[00056] Each engaging portion 106a of the interconnector 106 is welded on the positive terminal 105b of each cell 105, through the open portion 107a of the accommodating feature 107. The exposed negative terminal 105a of each cell 105 is always shielded by the shielded portion 107b of the accommodating feature 107. The shielded portion 107b aids in eliminated the risk of short circuiting by welding of the engaging portion 106a of the interconnector 106, on the wrong area of the cell 105. Furthermore, because of safe and secured packaging, the present subject matter provides a durable energy storage device 100.
[00057] Since the shielded portion 107b of the accommodating feature 107, secures the negative terminal 105a (not shown) of each cell 105 there within. This ensures that the interconnector 106 is welding on the positive terminal 105b (not shown) only. Thus, eliminating the risk of short circuit.
[00058] Figure 6 exemplarily illustrates a top perspective view of an energy storage module 100a, in accordance with an embodiment of the present subject matter. The top interfacing surface 127 of the casing 101 is provided with one or more first mounting provisions 123. The bottom interfacing surface 128 (not shown) of the casing 101 is provided with one or more third mounting provisions 125 (not shown).
[00059] Figure 7 exemplarily illustrates a top perspective exploded view of an energy storage module 100a with casing 101, in accordance with an embodiment of the present subject matter. In an embodiment, the casing 101 includes a first casing 101a and a second casing 101b. The the first casing 101a and the second casing 101b are secured together using one or more third fastening means 132.
[00060] In an embodiment, the first casing 101a and the second casing 101b are made of metal.
[00061] Figure 8 exemplarily illustrates a bottom perspective view of a top cover 133, in accordance with an embodiment of the present subject matter. The periphery 129 of the top cover 133 is provided with one or more second mounting provisions 124. One or more metal 122 in the shape of the periphery 129 of the top cover 133 is enmoulded in the top cover 133. The sleeve 122 is provided with one or more hole 135 corresponding to the second mounting provisions 124 provided in the top cover 133. In a preferred embodiment, the top cover 133 is a plastic cover.
[00062] In a preferred embodiment, the sleeve 122 is a metal sleeve.
[00063] The metal sleeve 122 provides a flat surface with low tolerance. The top casing 133 being a plastic part can be easily enmoulded with the metal sleeve 122 during manufacturing.
[00064] In an embodiment, the interfacing surface 136 (not shown) of the bottom cover 134 is provided with one or more fourth mounting provisions 126. In an embodiment, the bottom casing 134 can be a metal casing.
[00065] Figure 9 exemplarily illustrates a bottom perspective view of a top cover 133 with enmolded metal sleeve 122, in accordance with an embodiment of the present subject matter. A sealant 121 is applied on the interfacing surfaces of the casing 101 and the top cover 133. The sealant 121 is applied using a suitable method such as spraying, brushing, or injecting, and is allowed to cure for a predetermined period. The sealant 121 may be a curable material such as an epoxy, silicone, or polyurethane, or any other suitable material.
[00066] Figure 10 exemplarily illustrates a top exploded view of an energy storage device 100, in accordance with an embodiment of the present subject matter. The one or more energy storage module 100a is enclosed between the bottom cover 134, the casing 101, and the top cover 133. The top cover 133 configured to cover the energy storage module 100a from a top portion is fastened to the top periphery of the casing 101 using a plurality of first fastening means 130 that correspond to the first mounting provision 123 and second mounting provision 124. The bottom cover 133 configured to support the energy storage module from bottom portion of the energy storage is fastened to the bottom periphery of the casing 101 using a plurality of second fastening means 131 that correspond to the third mounting provision 125 and fourth mounting provision 126.
[00067] In an embodiment, the fastening means (130, 131) pass through at least two of the corresponding mounting provisions (123, 124, 125), ensuring that the casing 101, top cover 133 and bottom cover 101 are secured together.
[00068] Figure 11 exemplarily illustrates a top perspective view of an energy storage device 100.
[00069] The metal sleeve 122 provides a flat surface with low tolerance and provides a sealing surface with low tolerance between the top cover 133 and the casing 101 after fastening. Low tolerance at the metal-metal contact provided by the metal sleeve 122 and casings 101 ensure a tight fit between the top cover 133 and the casing 101. Low tolerance surface is useful for sealing because it provides a more precise and consistent surface for the sealing material to adhere to. Flat and has low tolerances, allows the sealant 121 to spread evenly and form a tighter seal, preventing any gaps or leaks. This is particularly important in applications where a high degree of sealing is required, such as in the case of energy storage device 100. This tight fit, in turn, helps to prevent the ingress of any contaminants or foreign matter into the energy storage module 100a. It further aid in adhering to the weight requirements by reducing the weight of the top casing 133 made out of plastic instead of metal.
[00070] By using a low tolerance surface, the energy storage device 100 can be sealed more effectively, ensuring that the internal components are protected from external factors and that the device operates safely and efficiently.
[00071] The sealant 121 and the tight fit provided using a metal sleeve together provides a hermetic seal that prevents the entry of any external contaminants or moisture into the energy storage device 100. This ensures the longevity and reliability of the device and protects it from damage due to environmental factors.

 
LIST OF REFERENCE NUMERALS

100: Battery pack, energy storage device
100a: Battery module, energy storage module
101: Casing
101a: First casing
101b: Second casing
104: Holder
104a: A first part
104b: A second part
105: Cells
105a: Negative terminal
105b: Positive terminal
106: Interconnectors
106a: Engaging portion
107: Ring feature
107a: Open ring portion
107b: Covered ring portion
107c: Restrictors
108: Base member
110: Snap fitting provisions
109: Fastening provisions
112: Voltage sensing points
118: Secondary port
120: Socket
121: Sealant
122: Sleeve, metal sleeve
123: First mounting provisions
124: second mounting provisions
125: Third mounting provisions
126: Fourth mounting provisions
127: Top interfacing surface
128: Bottom interfacing surface
129: Periphery
130: First fastening means
131: Second fastening means
132: Third fastening means
133: Top cover
134: Bottom cover
135: Hole in metal sleeve
, Claims:We claim,

1. An energy storage device (100) comprising:
one or more energy storage module (100a);
a casing (101); and
a top cover (133), said top cover (133) comprises a periphery (129) being enmolded with one or more sleeve (122);
wherein said sleeve (122) being configured to provide a low tolerance surface at the junction between said top cover (133) and said casing (101) in an assembled condition, wherein said casing (101) and said top cover (133) being configured to encase said one or more energy storage module (100a) from at least one direction.
2. The energy storage device (100) as claimed in claim 1, wherein said sleeve (122) is a metal sleeve.
3. The energy storage device (100) as claimed in claim 1, wherein said top cover (133) is a plastic cover.
4. The energy storage device (100) as claimed in claim 1, wherein said casing (101) is a metal casing.
5. The energy storage device (100) as claimed in claim 1, wherein said casing (101) comprises a top interfacing surface (127) being provided with one or more first mounting provisions (123).
6. The energy storage device (100) as claimed in claim 1, wherein said casing (101) comprises a bottom interfacing surface (128) being provided with one or more third mounting provisions (125).
7. The energy storage device (100) as claimed in claim 1, wherein said top cover (133) being provided with one or more second mounting provisions (124)
8. The energy storage device (100) as claimed in claim 1, wherein said casing (101) comprises of a first casing (101a) and a second casing (101b).
9. The energy storage device (100) as claimed in claim 1, wherein said energy storage device (100) comprises a bottom cover (134) being configured to encase the bottom portion of said one or more energy storage module (100a).
10. The energy storage device (100) as claimed in claim 5, wherein said bottom cover (134) being provided with one or more fourth mounting provisions (126).
11. The energy storage device (100) as claimed in claim 1, comprising a sealant (121) being applied on one or more junction of at least two of said casing (101), said top cover (133) and said bottom cover (134) during assembly.
12. The energy storage device (100) as claimed in claim 1, wherein said sealant (121) being a liquid sealant.
13. The energy storage device (100) as claimed in claim 1, claim 8 and claim 9, wherein at least two of said casing (101), said top cover (133) and said bottom cover (134) are fastened using one or more fastening means (130, 131, 132).
14. The energy storage device (100) as claimed in claim 1, wherein said one or more energy storage module (100a) comprises one or more cells (105) configured to be disposed within one or more holder (104).
15. The energy storage device (100) as claimed in claim 14, wherein said one or more holder (104) includes one or more accommodating feature (107), said one or more accommodating feature (107) enable securing of at least one end of each cell of said one or more cells (105) of said one or more energy storage module (100a).
16. The energy storage device (100) as claimed in claim 15, wherein said one or more accommodating feature (107) being a ring-shaped structure.
17. The energy storage device (100) as claimed in claim 14, wherein at least one end of each cell (105) of said energy storage device (100), including a positive terminal (105b) and a negative terminal (105a).
18. The energy storage device (100) as claimed in claim 15, wherein said one or more accommodating feature (107) being configured to eliminate contact between said positive terminal (105b) and said negative terminal (105a) of said each cell (105) of said one or more cells (105).
19. The energy storage device (100) as claimed in claim 14, wherein each part of said one or more parts (104a, 104b) of said holder (104) includes a plurality of fastening provisions (109), and a plurality of snap fitting provisions (110), wherein said plurality of fastening provisions (109), and said plurality of snap fitting provisions (110) together aid in aligning said one or more parts (104a, 104b) of said holder (104) in parallel.
20. The energy storage device (100) as claimed in claim 14, wherein said one or more cells (105) being electrically connected to one or more interconnectors (106), by means of one or more voltage sensing points (112) provided on said holder (104).
21. The energy storage device (100) as claimed in claim 14, wherein said one or more holder (104) includes a first part (104a), and a second part (104b), wherein both said first part (104a), and said second part (104b) align together in parallel, and hold said one or more cells (105) there between.
22. The energy storage device (100) as claimed in claim 17, wherein said negative terminal (105a) being on the outer periphery of least one end of each cell (105) and said positive terminal (105a) being encircled by said negative terminal (105a).
23. The energy storage device (100) as claimed in claim 15, wherein said one or more accommodating feature (107) includes a shielded portion (107b) and an open portion (107a).
24. The energy storage device (100) as claimed in claim 23, wherein said shielded portion (107b) covers a negative terminal (105a) of said each cell (105) within said energy storage device (100).
25. The energy storage device (100) as claimed in claim 23, wherein said open portion (107a) being an opening, exposing a positive terminal (105b) of said each cell (105) within said energy storage device (100).
26. The energy storage device (100) as claimed in claim 15, wherein each accommodating feature (107) of said one or more parts (104a, 104b), includes a plurality of inward protruded restrictors (107c).
27. The energy storage device (100) as claimed in claim 23, wherein said open portion (107a), said shielded portion (107b), and said restrictors (107c), together function as a locator for each cell (105) and thus aid in easy assembly of the one or more cells (105) within a holder (104).
28. The energy storage device (100) as claimed in claim 20, wherein each engaging portion (106a) of said interconnector (106) being welded on a positive terminal (105b) of said each cell (105) through an open portion (107a) of an accommodating feature (107).