Claims:We Claim:

1. An energy storage device (100), said energy storage device (100) comprising:
a plurality of interconnect members (103);
a bottom metallic layer (515a, 515b), said bottom metallic layer (515a, 515b) to be disposed on said plurality of interconnect members (103) wherein said bottom metallic layer (515a, 515b) comprise of:
a plurality of tongues (650) formed from said bottom metallic layer (515a, 515b) at one or more ends of a plurality of openings (203).
2. The energy storage device (100) as claimed in claim 1, wherein said bottom metallic layer (515a, 515b) is made of Nickel.
3. The energy storage device (100) as claimed in claim 1, wherein said energy storage device (100) comprises a plurality of fuse (630) formed at the bottom metallic layer (515a, 515b) integrated to said plurality of tongues (650).
4. The energy storage device (100) as claimed in 1, wherein said energy storage device (100) comprises a top metallic layer (505a, 515a).
5. The energy storage device (100) as claimed in claim 1, wherein said top metallic layer (505a, 515a) is made of Copper.
6. The energy storage device (100) as claimed in claim 3, wherein said energy storage device (100) comprises a reinforcement structure (660) being molded over said bottom metallic layer (505b, 515b) and said top metallic layer (505a, 515a) covering a portion of said plurality of tongues (505).

7. The energy storage device (100) as claimed in claim 6, wherein said reinforcement structure (660) is made of plastic.
8. The energy storage device (100) as claimed in claim 1, wherein said top metallic layer (505a, 515a) and said bottom metallic layer (505b, 515b) form said plurality of interconnect members (103). , Description:TECHNICAL FIELD
[0001] The present invention relates to a vehicle. More particularly, the present invention relates to at least one interconnecting structure for energy storage cells of an energy storage device. The present invention is filed as a patent of addition and thus is an improvement and/or modification of the invention titled “Interconnecting structure for energy storage cells” as claimed in the complete specification filed in the Indian Patent Office vide application no. 202041016391.
BACKGROUND
[0002] In recent times there is an increased demand to control emissions from automobiles, in view of stringent emission norms. As a result, a number of hybrid and electric vehicles are seeing the light of the day in order to minimize the amount of emissions. Typically, hybrid vehicles have distinct advantage of allowing longer travel, as at least one source is always available to drive the vehicle. Hence, there is low risk of running out of fuel or getting stranded as it may happen with a traditional internal combustion powered vehicle.
[0003] Hybrid vehicles which are configured to be powered either by an internal combustion engine or electric motor or both are off-late replacing normal engine powered vehicles. In the Hybrid vehicles, an internal combustion engine can be used for driving on terrain or for long distances and electric propulsion system can be used for the shorter distances. However, incorporation of both internal combustion engine and electric motor assembly in the hybrid vehicle and especially in a two-wheeled vehicle makes the system bulky and more complex.
[0004] Thus, electric vehicles have gained popularity in recent years as the potential replacement for internal combustion vehicles, since they promise zero emission from electric drive system, and a break away from oil dependency. Hence, a focus of the electric vehicle industry in battery research is directed to rechargeable batteries, such as sealed, starved electrolyte, lead/acid batteries, are commonly used as power sources in vehicles and the like. However, lead-acid batteries are heavy, bulky, and have short cycle life, short calendar life, and low turn around efficiency. Hence, a pure electric vehicle entails a problem in that its own weight increases. Also, the traveling distance for a pure electric vehicle is short, and due to packaging constraints, it is difficult to mount one or more batteries as an additional rechargeable back-up power source. The limited spaces of the vehicle and further structural challenges for installing said one or more additional batteries thereon is another constraint with pure electric vehicles.
[0005] In order to overcome problems associated with said conventional energy storage devices including the lead-acid batteries for the vehicle, a lithium ion battery cell provides an ideal system for high energy-density applications, improved rate capability, and safety. Further, the rechargeable energy storage devices like lithium-ion batteries exhibit characteristics such as flexibility, solid components and more which makes it useable on the vehicle. First, for safety reasons, the lithium ion battery is constructed of all solid components while still being flexible and compact. Secondly, the energy storage device including the lithium ion battery exhibits similar conductivity characteristics to primary batteries with liquid electrolytes, i.e., deliver high power and energy density with low rates of self-discharge. Thirdly, the energy storage device as the lithium ion battery is readily manufacturable in a manner that it is both reliable and cost-efficient. Finally, the energy storage device including the lithium ion battery is able to maintain a necessary minimum level of conductivity at sub-ambient temperatures.
[0006] In a known structure for an energy storage device, the energy storage cells including lithium ion battery cells are disposed in at least one cell holder assembly in series and /or parallel combinations. Generally, the interconnect members are adapted for electrically interconnecting at least one array of the energy storage cells being disposed in said at least one energy storage device. Particularly, each of the interconnect members and at least one of the energy storage cells are made of dissimilar materials. Further, the interconnecting plates includes metal plate made up of steel and the energy storage cell terminals are made of nickel. However, nickel is not as good as a conductor as steel. Hence in the known structure, the interconnecting plates including metal plates having high thermal and electrical conductivity are electrically connected to at least one terminal of each of the energy storage cells through a spot-welding method having at least one contact point.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] The detailed description is described with reference to the accompanying figures, which is related to interconnecting structures for energy storage cells being one embodiment of the present subject matter. However, the present subject matter is not limited to the depicted embodiment(s). In the figures, the same or similar numbers are used throughout to reference features and components.
[0008] Fig.1 is a perspective view of at least one energy storage device, as per one embodiment of the present invention.
[0009] Fig.2 is an exploded view of said at least one energy storage device, as per one embodiment of the present invention.
[00010] Fig. 3 is another exploded view of said at least one energy storage, device as per one embodiment of the present invention.
[00011] Fig. 4 is a bottom view of at least one interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention.
[00012] Fig. 5a is a perspective view of at least one single row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention.
[00013] Fig. 5b is a perspective view of at least double row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention.
[00014] Fig. 6 illustrates an enlarged view of a portion of at least one bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00015] Fig. 7 illustrates an enlarged view of a a portion of at least one bottom metallic layer for said at least one energy storage device elucidating a reinforcement structure for said at least one energy storage device, as per one embodiment of the present invention.
[00016] Fig. 8a illustrates a perspective view of at least one single row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention.
[00017] Fig. 8b illustrates another perspective view of at least one single row interconnecting structure with a top metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00018] Fig. 9a illustrates a top view of at least one single row interconnecting structure with a bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00019] Fig. 9b illustrates a side view of at least one single row interconnecting structure with a bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00020] Fig. 9c illustrates a bottom view of at least one single row interconnecting structure with a bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00021] Fig. 10 illustrates an exploded view of at least one single row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention.
[00022] Fig.11a illustrates a perspective view of at least one double row interconnecting structure with a top metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00023] Fig. 11b illustrates a side view of at least one double row interconnecting structure with a top metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00024] Fig. 12a illustrates a perspective view of at least one double row interconnecting structure with a bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00025] Fig. 12b illustrates a side view of at least one double row interconnecting structure with a bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention.
[00026] Fig. 13 illustrates an exploded view of at least one double row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention.
DETAILED DESCRIPTION
[00027] Various features and embodiments of the present subject matter here will be discernible from the following further description thereof, set out hereunder. In a typical design for one or more interconnect members, one or more slits are integrally formed in at least a portion thereof. The one or more slits comprises at least one electrode structure configured to form at least one contact joint with at least one terminal of each of said one or more energy storage cells through the spot welding. Particularly, each of said one or more slits formed in said at least a portion of said one or more interconnect members includes a shaped profile having a small cross section. The shunt current passing through said each of said one or more interconnect members takes extremely short travel path and a shorter time interval to travel through each of said one or more interconnect members. Thus, a larger current flow through said each of one or interconnecting plates develops very less resistance across said at least one electrode structure of said one or more interconnecting plates and said at least one terminal of the one or more energy storage cells. This is not sufficient enough to heat said at least one electrode structure to molten steel and forms a weak contact point between said interconnect members and said one or more energy storage cells.
[00028] In another known design configured with slits in the interconnecting structure, high current flows through the interconnect members. This occurs due to low resistance developed across an electrode & a terminal of the energy storage cell. As a consequence, not enough molten steel is available at the interface of the interconnecting structure & the energy storage cells leading to poor electrical contact.
[00029] In yet another known design the high shunt current across the contact point tends to reduce the diameter thereof, thereby rendering said one or more contact points more susceptible to damage, expulsions and degradation of said at least one electrode structure. This causes damage to the entire energy storage cells and thus resulting in high cost replacement for the entire at least one cell of the energy storage cells. Sensing the correct voltage across the cells is an important parameter and any error in this can lead to cell imbalance and battery malfunction. It was observed that high current withdrawing leads to error in voltage sensed and melting of the interface parts. Moreover, conventional art has limited power rating and is limited due to manufacturing constraints.
[00030] In order to obtain desired power from the energy storage system, numerous lithium-ion cells are interconnected in series and parallel configuration. Conventionally, the interconnect members are usually made using copper and nickel joined together by various methods such laser and spot-welding means combined with plastic parts such as plastic cell holders. During vibration, the plastic parts tend to have deviation which causes load to be applied to the spot-weld, thereby creating deformities in the spot-welding. In order to prevent such deformities, a plurality of rubber dampers is provided to dampen these vibrations. However, damping the vibrations of the Lithium-ion cells using rubber dampers results in an additional cost to the overall energy storage system.
[00031] Moreover, during the time of short circuit, where positive and negative terminals of the cell comes in contact, or when high current is passed during charging or discharging of a cell, it may cause severe damage to the cells, thereby resulting into battery pack either catching fire or posing the risk of thermal runaway, causing harm to the rider. Thus, it becomes essential to disconnect the cell from the energy storage system at the time of short circuit.
[00032] Thus, there is a need for an improved solution of interconnector structure that helps dampens the vibrations of the lithium-ion cells without employing additional dampers, provide stable cell contact for transmission of power and which can overcome all of the above problems & other problems in known art.
[00033] With the above objectives in view, the present invention provides an improved design for the one or more interconnecting structure configured for electrically interconnecting one or more energy storage cells being disposed in the one or more configuration in at least one energy storage device. In one embodiment, each of said one or more interconnect members comprises one or more apertures in the form of the slits integrally formed in at least a portion thereof. In one embodiment, said one or more apertures including slits are formed in the manner so as to be in alignment with at least one terminal of said one or more energy storage cells being disposed in said at least one cell holder assembly of said at least one energy storage device. In one embodiment, said slit is comprising one or more receiving portions integrally formed therein and adapted to receive said one or more energy storage devices. As per one embodiment, a plurality of interconnect members includes a pair of single row terminal interconnect members bordering a plurality of double row interconnecting structure wherein the double row interconnecting structure are disposed on opposite sides of the energy storage cell holder assembly. Further, each interconnect member of the plurality of interconnect members is constituted by a top metallic layer and a bottom metallic layer integrated to each other for electrically connecting the plurality of energy storage cells.
[00034] In an embodiment, an energy storage device is disclosed which comprises of a plurality of interconnect members, a bottom metallic layer wherein said bottom metallic layer is to be disposed on said plurality of interconnect members wherein said bottom metallic layer further comprise of a plurality of tongues formed from said bottom metallic layer at one or more ends of a plurality of openings.
[00035] As per one embodiment, the energy storage device comprises a bottom metallic layer which further comprises a plurality of tongues formed from said bottom metallic layer at one or more ends of a plurality of openings. Herein, as per another embodiment, said bottom metallic layer is made of Nickel.
[00036] According to an embodiment, the energy storage device comprises a plurality of fuse integrated to said plurality of tongues.
[00037] As per another aspect of the invention, the energy storage device further comprises of a top metallic layer made up of Copper.
[00038] In yet another embodiment, the energy storage device comprises a reinforcement structure being molded over said bottom metallic layer and said top metallic layer covering a portion of said plurality of tongues.
[00039] In another embodiment, the reinforcement structure is made up of plastic.
[00040] In one embodiment, said top metallic layer member is connected with said bottom metallic layer member via means of joining process such as RSW (Resistance Spot Welding), laser welding, bonding or ultrasonic welding. As per one of the embodiments, an end portion in the energy storage device comprises of openings for withdrawing current. As per one of the embodiments, said end portion further comprises one opening for measuring voltage.
[00041] As per one of the embodiments, said top metallic layer is attached with an energy storage device (+5Volts and -5 Volts) to collect the current. As per one of the embodiments, an opening is provided to sense the voltage of corresponding rows of said energy storage device. As per one of the embodiments, said top metallic layer is made of metal such as nickel, copper, steel, clad or metal alloy. The collected current (I) from said energy storage device are merged in said bottom metallic layer. As per one of the embodiments, the collected current (I) from said energy storage device is withdrawn from a plurality of openings positioned at the end of said interconnect member. In one embodiment, said bottom metallic layer member can be separately utilized as a power line.
[00042] In one embodiment, a plurality of shunt is internally formed with said plurality of interconnect members. As per one of the embodiments, said bottom metallic layer has a plurality of openings to access said plurality of shunt positioned on said top metallic layer. In one embodiment, a plurality of energy storage device is attached to said interconnect member via said plurality of shunt.
[00043] In one embodiment, the thickness of said top metallic layer is relatively lower than said bottom metallic layer. As per one of the embodiments, the thickness of said top metallic layer and said bottom metallic layer is different.
[00044] An object of the present invention is to provide an improved design for said one or more interconnect members adapted for interconnecting arrays of said one or more energy storage cells that helps in dampening of the vibrations caused in the energy storage device.
[00045] In one embodiment, said at least one energy storage device includes said one or more energy storage cells disposed in said at least one cell holder assembly of said energy storage device. As per one embodiment, said one or more energy storage cells disposed in said one or more configuration including parallel and / or series configuration are electrically connected through a plurality of interconnect members via said plurality of shunt.
[00046] Another objective of the present invention is to help dampen the vibration in the energy storage device without the requirement of any additional component to be utilized for reducing the vibrations, thereby reducing the cost of the overall energy storage device.
[00047] Yet another objective of the present invention is to protect the spot-welding of the top metallic layer and the bottom metallic layer from being deformed due to the vibration and load on the energy storage device.
[00048] Another objective of the present invention is to safeguard the energy storage device from short circuit in order to overcome hazardous consequences such as fire caused due to short circuit of the battery cells.
[00049] Various other features and advantages of the invention are described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements. The drawing in which an element first appears is indicated by the leftmost digit(s) in the corresponding reference number. With reference to the accompanying drawings, wherein the same reference numerals will be used to identify the same or similar elements throughout the several views. It should be noted that the drawings should be viewed in the direction of orientation of the reference numerals.
[00050] Fig.1 is a perspective view of at least one energy storage device, as per one embodiment of the present invention. In one embodiment, said energy storage device (100) comprises a securing cell holder (100a) and a receiving cell holder (100b). In one embodiment, said at least one energy storage device (100) further comprises one or more energy storage cells (not shown) being disposed in the energy storage device (100). As per one embodiment, said one or more energy storage cells are electrically connected in at least one configuration including a series combination and /or parallel configuration to form said one or more array of combinations for said one or more energy storage cells. As per one embodiment, said each of said array of electrically connected storage cells are connected together through one or more interconnect members (103).
[00051] Fig.2 is an exploded view of at least one energy storage device (100), as per one embodiment of the present invention. In one embodiment said each of the array of said one or more energy storage cells are disposed securing cell holder (100a). In one embodiment, said plurality of interconnect members (103) are adapted for electrically interconnecting said one or more energy storage cells. In one embodiment, at least one end portion (104) of each of said interconnect members (103) are electrically connected for transmitting current and voltage output of said at least one energy storage device (100) thereto. Particularly, as per one embodiment, said at least one securing cell holder (100a) includes one or more mounting provisions formed therein. In one embodiment, said plurality of interconnect members (103) is electrically connected to a battery management system through said one or more mounting provisions (105). In one embodiment, said battery management system is configured for monitoring the output current and voltage for said at least one energy storage device (100) for transmitting said output current and said output voltage to one or more electrical components. As per one embodiment, a plurality of interconnect members (103) includes a pair of single row terminal interconnecting structure (103a) bordering a plurality of double row interconnecting structure (103b) on both sides, wherein the double row interconnecting structure (103b) are disposed on opposite sides of the energy securing cell holder (100a). Further each interconnecting structure (103a, 103b) of the plurality of interconnect members (103) being constituted by a top metallic layer (not shown in figure) and a bottom metallic layer (not shown in figure) electrically coupled to each other for electrically connecting the plurality of energy storage cells. In an embodiment, an energy storage device (100) is disclosed which comprises of a plurality of interconnect members (103), a bottom metallic layer (515a, 515b) wherein said bottom metallic layer (515a, 515b) is to be disposed on said plurality of interconnect members (103) wherein said bottom metallic layer (515a, 515b) further comprise of a plurality of tongues (650) formed from said bottom metallic layer (515a, 515b) at one or more ends of a plurality of openings (203).
[00052] Fig. 3 is another exploded view of said at least one energy storage, device as per one embodiment of the present invention. In one embodiment, the energy storage device (100) comprises of a plurality of interconnect members (103) placed at the top and at the bottom of the energy storage device (100). A cell holder portion (320) and a plurality of energy storage cells (310) are sandwiched together between two or more layers of interconnect members (103).
[00053] Fig. 4 illustrates a bottom view of said at least one energy storage device as per one embodiment of the present invention. The plurality of interconnect members (103) are placed at the bottom of the energy storage device (100).
[00054] Fig. 5a illustrates a perspective view of said at least one single row interconnecting structure (103a) of said one or more interconnect members (103) and Fig. 5b illustrates a perspective view of said at least one double row interconnecting structure (103b) of said at least one energy storage device (100), as per one embodiment of the present invention respectively. In an embodiment, the top metallic layers (505a, 505b) and the bottom metallic layer (515a, 515b) are shown. Herein, the top metallic layer (505a) and the bottom metallic layer (515a) form a single row interconnecting structure. Moreover, in another embodiment, the top metallic layer (505b) and the bottom metallic layer (515b) forms a double row interconnecting structure.
[00055] Fig. 6 and Fig.7 illustrates an enlarged view of a portion of at least one bottom metallic layer (515a, 515b) as per an embodiment of the present invention. In one embodiment, said at least one double row interconnecting structure (103b) of said plurality of interconnect members (103) (shown in Fig.2) comprises said one or more openings (203) adapted for securely positioning said each of said one or more energy storage cells in said at least one cell holder portion (320). In one embodiment, said at least a portion of said at least one cell holder portion (320) includes one or more locking structure formed integrally with at least a portion thereof. The one-or more locking structure conforms to a predetermined profile of each of said one or more openings (203) to securely position said each of said one or more interconnecting plates to said at least one cell holder assembly to lock interconnector while joining to form electrically conductive joint.
[00056] As per one embodiment, a plurality of shunt (620) in the form of slits are formed in at least a portion of said each interconnecting structure (103b) of said plurality of interconnect members (103). In one embodiment, at least one electrode structure protrudes towards a bottom face of said double row interconnecting structure (103b) in a substantially perpendicular direction to a surface of said double row interconnecting structure (103b). The bottom metallic layer (505b, 515b) comprises of a plurality of shunt (620) formed in at least a portion therein, as per one embodiment of the present invention. In one embodiment, at least one shunt of said plurality of shunt (620) formed in at least a portion of each of said plurality of interconnect members (103). As per one embodiment, said one or more contact points includes at least one spot weld position formed in alignment by electrically connecting said each of at least one electrode structure of said plurality of shunt (620) and said at least one terminal of said one or more energy storage cells by said spot welding.
[00057] Further, a plurality of tongue (650) is shown which is formed from said bottom metallic layer (515a, 515b) at one or more ends of the plurality of openings (203). Such plurality of tongues (650) is used to provide relief for the cells during vibration for the up and down motion of the Li-ion cell, thereby reducing the dampening effect of the vibrations since the plurality of tongues (630) is configured in such a manner that it acts as a spring dampening the axial movement of the Li-ion cell when subjected to load and vibration thereby achieving a stable cell contact.
[00058] As per another embodiment of the invention, a plurality of fuse (630) is provided at the bottom metallic layer (515a, 515b) wherein the plurality of fuse (630) is integrated to said plurality of tongues (630). Such plurality of fuse (630) is used to protect the cell and the user from any harm such as fire hazard or thermal runway. Moreover, such integrated plurality of fuse (630) with the plurality of tongues (650 ) results into the fuse disconnecting the cell from the energy storage device when a high current above permissible limit is passed or drawn from the cell to prevent fire hazards.
[00059] In another embodiment, a reinforcement structure (660) is molded over said bottom metallic layer (505b, 515b) and said top metallic layer (505a, 515a) covering a portion (not shown in figure) of said plurality of tongues (630). Such reinforcement structure (660) is made of plastic. Such reinforcement structure (660) covering a portion of said plurality of tongues (630) at the bottom metallic layer (505b, 515b) and said top metallic layer (505a, 515b) ensures that a dual layer of stiffness is provided to the energy storage device so as to prevent-spot welding deformities while load is being subjected to the energy storage device. Hence, the plurality of tongues (630) act as a load bearing structure as well as a spring that not only helps in dampening of the vibrations but also along with the reinforcement structure (660) sandwiched with the top metallic layer (505a,515a) provides stiffness to the overall energy storage device (100).
[00060] Fig.8a & 8b illustrates a perspective view and another side view of at least one single row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention. Herein the top metallic layer (505a) is shown along with the plurality of openings (203) and the end portion (104).
[00061] Fig. 9a, 9b and 9c illustrates a top, a side and a bottom view of at least one single row interconnecting structure with a bottom metallic layer (515a) along with the plurality of openings (203) and the end portion (104).
[00062] Fig. 10 illustrates an exploded view of at least one single row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention. Herein, the top metallic layer (505a) along with the bottom metallic layer (515a) is reinforced with the reinforcement structure (660) to provide stiffness to the energy storage device (100).
[00063] In one embodiment, said top metallic layer (505a) is connected with said bottom metallic layer (515a) via means of joining process such as RSW (Resistance Spot Welding), laser, bonding or ultrasonic welding. As per one of the embodiments, said top metallic layer (505a) includes said plurality of shunt (620) with reference to at least one of said plurality of energy storage device. In one embodiment, said top metallic layer (505a) is attached with an energy storage device (5- and 5+ volts) to collect the current.
[00064] In one embodiment, the combination of material used for manufacturing said top metallic layer (505a) and said bottom metallic layer (515a) is same. As per one of the embodiments, the combination of material used for manufacturing said top metallic layer member (505a) and said bottom metallic layer (515a) is different. In one embodiment, the thickness of said top metallic layer (505a) is relatively lower than said bottom metallic layer (515a). As per one of the embodiments, the thickness of top metallic layer (505a) and said bottom metallic layer (515a) is different.
[00065] Fig.11a & 11b illustrates a perspective view and a side view of at least one double row interconnecting structure with a top metallic layer for said at least one energy storage device, as per one embodiment of the present invention. Herein, in an embodiment, the top metallic layer (505b) is shown along with the plurality of openings (203) and the end portion (104).
[00066] Fig.12a and Fig. 12 b illustrates a perspective view and a side view of at least one double row interconnecting structure with a bottom metallic layer for said at least one energy storage device, as per one embodiment of the present invention. Herein, in an embodiment, the bottom metallic layer (515b) is shown along with the plurality of opening (203) and the end portion (104).
[00067] Fig. 13 illustrates an exploded view of at least one double row interconnecting structure for said at least one energy storage device, as per one embodiment of the present invention. Herein, in an embodiment, the top metallic layer (505b) and the bottom metallic layer (515b) is reinforced with the reinforcement structure (660) to provide stiffness to the overall energy storage device (100).
[00068] In one embodiment, said top metallic layer (505b) is connected with said bottom metallic layer member (515b) via means of joining process such as RSW (Resistance Spot Welding), laser, bonding or ultrasonic welding. As per one of the embodiments, said top metallic layer (305b) includes said plurality of shunt (620) with reference to at least one of said plurality of energy storage device. In one embodiment, said top metallic layer (505b) is attached with an energy storage device (5- and 5+ volts) to collect the current.
[00069] In one embodiment, the combination of material used for manufacturing said top metallic layer (505b) and said bottom metallic layer (515b) is same. As per one of the embodiments, the combination of material used for manufacturing said top metallic layer member (505b) and said bottom metallic layer (515b) is different. In one embodiment, the thickness of said top metallic layer (505b) is relatively lower than said bottom metallic layer (515b). As per one of the embodiments, the thickness of top metallic layer (505b) and said bottom metallic layer (515b) is different.
[00070] While certain features of the claimed subject matter have been illustrated and described herein, many modifications, substitutions, changes, and equivalents will now occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes that fall within the true spirit of the claimed subject matter.

List of Reference Signs:
100 Energy Storage Device
100a Securing Cell Holder
100b Receiving Cell Holder
103 Interconnect Members
103a Single row terminal interconnecting structure
103b Double row interconnecting structure
104 End Portion
105 Mounting Provisions
203 Openings
310 Energy storage cells
320 Cell holder portion
505a, 505b Top metallic layer (103a)
505b, 515b Bottom metallic layer (103b)
620 Shunt
630 Plurality of fuse
650 Plurality of tongue
660 Reinforcement structure