WO2023095109A1

WO2023095109A1 - An interconnect assembly for a battery pack

Info

Publication number: WO2023095109A1
Application number: PCT/IB2022/061530
Authority: WO
Inventors: Abishek Hosangady; Rahul Venkatraman; Rohit Venkatraman
Original assignee: Abishek Hosangady; Rahul Venkatraman; Rohit Venkatraman
Priority date: 2021-11-29
Filing date: 2022-11-29
Publication date: 2023-06-01

Abstract

The present invention relates to a cell interconnect assembly 100 for a battery pack 202 having a plurality of cells comprises a conductor layer 101 is adapted to be in thermo-electrical coupling with a corresponding tab of the plurality of cells of the battery pack 202, so as to electrically interconnect the cells and also to draw out heat generated by the cells, a circuit layer 102 is adapted to provide electrical isolation and prevent propagation of thermal runaway and a thermal relay layer 104 is adapted to be electrically insulated to the circuit layer 102, and to be thermally coupled with the circuit layer 102, so as to relay the heat extracted from the plurality of cells and the circuit layer 102 to a heat exchanger external to the cell interconnect assembly 100 without leaking electric current into the heat exchanger.

Description

TITLE: AN INTERCONNECT ASSEMBLY FOR A BATTERY PACK

FIELD OF THE INVENTION

This invention relates to electrical energy storage interconnect systems for automotive, on/off-grid energy storage, portable energy devices and manufacturing fields using a plurality of energy storage devices, more particularly to a cell interconnect assembly for a battery pack.

BACKGROUND OF THE INVENTION

This section is intended to provide information relating to the field of the invention and thus any approach/functionality described below should not be assumed to be qualified as prior art merely by its inclusion in this section.

A cell is a fundamental building block of a battery pack for energy storage and is used in electric vehicles, telecommunication devices, on/off-grid energy storage, portable energy devices and manufacturing fields etc. A cylindrical cell consists of a positive electrode on the top surface and negative electrodes on the bottom surfaces of the cell. These electrodes are called 'cell tabs' and are the points to which connections are made. A battery pack is an electrical energy source using a plurality of the above-said cells in which the tabs of a plurality of the cells are connected in series and parallel connected arrays, that are electromechanically connected to current carrying conductors that provide an electrical output of voltage and current. Typical battery packs are manufactured/fabricated wherein the individual storage devices are connected to each other using either a cold- welding process/hot welding process where the above said cell s tab s (both positive and negative) are electrically/mechanically connected to a current-carrying conductor via applying heat through a spot welding machine/ soldering iron/ laser welding machine/ cell bonding machine.

Interconnect systems currently consist of heat inducing mechanisms such as resistance spot welding, laser welding and also cold-welding processes such as ultrasonic welding, cell bonding which add a lot of capital expenditure intensive equipment thereby making the assembly process for a battery pack costly and involving complex manufacturing processes.

Current battery packs use metal conductors that are welded onto the terminals or tabs of the individual energy storage cells, which make it extremely difficult to provide serviceability of the pack in-case of malfunctioning cell(s). The whole battery pack would have to be replaced if a single cell has to be replaced as the replacement costs are more cost-effective than the cost of repairing current battery packs.

The problems mentioned above were previously dealt with in the following manners: use of safety gloves/insulated clothing by technicians/assembly line workers while assembling battery pack, which is not a fail proof method for worker/human safety. Nickel strips that had to be welded onto the tabs/terminals of the cells via welding techniques such as resistance spot welding, laser welding, and ultrasonic welding. These processes involve complex steps and hence is expensive and time consuming.

Cell terminals had screws/bolts inserted into them where the metal conductors connecting them to a plurality of cells had to be tightened with bolts making the whole assembly very heavy and space consuming. This would reduce the energy density of the battery pack and defeating the purpose of making it swappable.

The other limiting issue for lithium-ion batteries is safety. Lithium-ion batteries are very sensitive to overcharge and high temperature. At temperatures above 70°C, unfavourable heat-producing side reactions inside the battery cell can lead to even further increases in the battery cell temperature. The battery cell internal temperature increases rapidly if heat is not dissipated effectively. Thermal runaway is triggered by portions of the battery cell reaching critical temperatures that cause the onset of heat-producing exothermic reactions. Internal short circuiting can lead to rapid temperature rises in an individual battery cell leading to a thermal runaway, and the temperature increase in one cell can propagate to other nearby cells in a battery pack, thus causing them to rapidly self -heat, too leading to a cascading effect of thermal runaway propagation. Furthermore, the energy released from these reactions can be significant and dangerous. Hence, there is a need for an improved cell interconnection system for electrical and thermal management of a battery pack. Further, there is need to simplify the assembly process in a battery pack to address the aforementioned issues.

OBJECTIVE OF THE INVENTION:

An object of the present invention is to provide a solution to the complicated cell interconnection assembly processes in a battery pack using a plurality of energy storage devices with the aid of an electromechanical cell interconnection assembly that connects individual energy storage cells into a battery pack.

Another object of the present invention is to reduce the cost of battery pack assembly by eliminating the usage of expensive equipment for the welding process.

Another object of the present invention is to also improve the serviceability of the pack, allowing individual energy storage units to be replaced in case of failure during the operational life-cycle of the pack in all its use cases.

Another object of the present invention is to also achieve an optimum provision of cooling for individual energy storage devices via its tab's, to increase the life-cycle and performance of the device throughout its working voltage. SUMMARY OF THE INVENTION

One or more shortcomings of the conventional systems are overcome by system as claimed and additional advantages are provided through the provision of system and method as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.

The present invention relates to a battery pack with a cell interconnection assembly for a battery pack that simplifies cell interconnection assembly process by being a weldless assembly , enables reduction in the cost of battery pack assembly, improves the serviceability of the battery pack by allowing individual energy storage units to be replaced in case of failure during the operational life-cycle of the pack in all its use cases and achieves an optimum provision of cooling for individual energy storage devices via its tabs.

The cell interconnect assembly for a battery pack having a plurality of cells, the assembly comprises, a conductor layer bonded to a base layer, is adapted to be in thermo-electrical coupling with a corresponding tab of the plurality of cells of the battery pack, so as to electrically interconnect the cells and also to draw out heat generated by the cells. Further the cell interconnect assembly for battery pack comprises a circuit layer electrically coupled with the conductor layer and physically bonded to the base layer on at least one side is adapted to provide electrical isolation and prevent propagation of thermal runaway. The cell interconnect assembly further comprises a thermal relay layer, positioned over the circuit layer, is adapted to be electrically insulated to the circuit layer, and to be thermally coupled with the circuit layer, so as to relay the heat extracted from the plurality of cells and the circuit layer to a heat exchanger external to the cell interconnect assembly without leaking electric current into the heat exchanger. The base layer is adapted to facilitate transfer of heat from the conductor layer to the thermal relay layer.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF DRAWINGS

The novel features and characteristics of the disclosure are set forth in the description. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which: Fig. 1 illustrates a schematic representation of a cell interconnect assembly according to one or more embodiments of the present disclosure and

Fig. 2 illustrates an exemplary environment of a cell interconnect assembly according to one or more embodiments of the present disclosure.

The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the assemblies, structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

BRIEF DESCRIPTION OF THE INVENTION:

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as would normally occur to those skilled in the art are to be construed as being within the scope of the present invention.

It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the invention and are not intended to be restrictive thereof. The terms ' comprises' , ' comprising' , or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting.

Embodiments of the present invention will be described below in detail with reference to the accompanying figures.

The present invention relates to a battery pack with a cell interconnection assembly for a battery pack that simplifies cell interconnection assembly process by being a weldless assembly, enables reduction in the cost of battery pack assembly, improves the serviceability of the battery pack by allowing individual energy storage units to be replaced in case of failure during the operational life-cycle of the pack in all its use cases and achieves an optimum provision of cooling for individual energy storage devices via its tabs.

Disclosed herein is a cell interconnect assembly for a battery pack having a plurality of cells, the assembly comprises, a conductor layer bonded to a base layer, is adapted to be in thermo-electrical coupling with a corresponding tab of the plurality of cells of the battery pack, so as to electrically interconnect the cells and also to draw out heat generated by the cells. Further the cell interconnect assembly for battery pack comprises a circuit layer electrically coupled with the conductor layer and physically bonded to the base layer on at least one side is adapted to provide electrical isolation and prevent propagation of thermal runaway. The cell interconnect assembly further comprises a thermal relay layer, positioned over the circuit layer, which is adapted to be electrically insulated to the circuit layer, and to be thermally coupled with the circuit layer, so as to relay the heat extracted from the plurality of cells and the circuit layer to a heat exchanger external to the cell interconnect assembly without leaking electric current into the heat exchanger. The base layer is adapted to facilitate transfer of heat from the conductor layer to the thermal relay layer. In a non-limiting embodiment, the conductor layer is in thermo-electrical coupling with a corresponding tab of the plurality of cells via a plurality of flaps 105 with flat projections that are comprised in the conductor layer.

In another embodiment, the circuit layer is divided into plurality of sections electrically insulated from each other, wherein each of the plurality of sections are connected to the plurality of flaps in the conductor layer.

In yet another embodiment, each of the plurality of flaps comprises a neck region that connects the flap to the conductor layer, wherein the neck region is configured to function as a fusible link, so as to melt down in an event of short circuit of a corresponding cell from the plurality of cells.

In a further embodiment, the base layer comprises one or more through-holes, wherein the through holes facilitate the transfer of heat from the plurality of flaps in the conductor layer to the thermal relay layer.

In an embodiment, the heat exchanger comprises at least of a heat sink or a thermally conductive device associated with a cooling mechanism adapted to cool the thermally conductive device using passive flow of air, forced flow of air, a liquid coolant, a heat extraction tube, or a combination thereof.

In another embodiment, the plurality of flaps in the conductor layer of the cell interconnect assembly is configured to establish a surface contact with the corresponding tabs of the plurality of cells only when a pressure is applied axially over the cell interconnect assembly resulting from fastening of an outer casing of the battery pack.

In yet another embodiment, the cell interconnect assembly is prefabricated so as to enable ease in assembly and serviceability of the battery pack.

In another embodiment, the cell interconnect assembly is thermally coupled to a fluid-based cooling device through the heat exchanger, wherein the fluid-based cooling device comprises a one or more peripheral devices and a controller, configured to draw heat away from the cell interconnect assembly by regulating the flow of the fluid, temperature of the fluid or combination thereof using the one or more peripheral devices.

In an embodiment, the one or more peripheral devices comprises one or more thermal sensors, a fan, a liquid coolant, a heat extraction tube, or a combination thereof, wherein the controller is configured to receive at least a generated temperature data from one or more thermal sensors, compare the generated temperature data with a predefined temperature data value and to regulate the functioning of the fluid based device based on the comparison using the one or more peripheral devices of the fluid-based cooling device. Figure 1 illustrates a schematic representation of a cell interconnect assembly 100 according to one or more embodiments of the present disclosure.

In accordance with one embodiment of the disclosure, a cell interconnect assembly

100 to interconnect a plurality of battery cells within a battery pack is provided. In an exemplified embodiment the cell interconnect assembly 100 includes a Composite Core Printed Circuit Board (CPCB) as shown in Figure 1. The cell interconnect assembly 100 includes a conductor layer 101, a circuit layer 102, a base layer 103 and a thermal relay layer 104. The conductor layer 101 is bonded to a base layer 103 and is adapted to be in thermo-electrical coupling with a corresponding tab of the plurality of cells of the battery pack, so as to electrically interconnect the cells and also to draw out heat generated by the cells. The conductor layer 101 comprises a plurality of flaps 105 with flat projections that are in thermo-electrical coupling with a corresponding tab of the plurality of cells. The plurality of flaps 105 in the conductor layer 101 in an embodiment may be cut from a single sheet of a material and comprise a neck region in enable flexibility of the each of the flaps. According to an embodiment the conductor layer 101 comprise a metal plate placed inside the battery pack. The metal plate/metal conductor layer

101 is a cut piece which includes circular cavities of evenly spaced electromechanical flap structures. The electro-mechanical flap structures 105 comprise a neck down region configured to function as a fusible link and melt down in an event of short circuit of a cell from the plurality of cells. The electromechanical flaps 105 are designed to establish complete contact to the cell’s terminal due to pressure applied axially towards the cell terminal via the battery casing thereby creating full surface contact throughout the said flaps 105 and cell’s terminal surface.

Therefore, each of the plurality of flaps 105 comprises a neck region that connects the flap 105 to the conductor layer 101. Further in an embodiment, the plurality of flaps 105 in the conductor layer 101 of the cell interconnect assembly 100 is configured to establish a surface contact with the corresponding tabs of the plurality of cells only when a pressure is applied axially over the cell interconnect assembly 100 resulting from fastening of an outer casing of the battery pack.

The circuit layer 102 bonded to the base layer 103 is electrically coupled with the conductor layer 101 is adapted to provide electrical isolation and prevent propagation of thermal runaway. The circuit layer 102 includes a plurality of sections. Each of the plurality of sections is electrically insulated from each other. The base layer 103 comprises one or more through-holes adapted to facilitate transfer of heat from the conductor layer 101 to the thermal relay layer 104. The through holes facilitate the transfer of heat from the plurality of flaps 105 in the conductor layer 101 to a thermal relay layer 104. The cell interconnect assembly 100 in an embodiment also includes one or more through-holes located within each of the corresponding plurality of sections of the circuit layer 102. Each of the one or more through hole is configured to facilitate ‘tab cooling’ of the plurality of interconnect tabs to the battery terminal of the corresponding plurality of battery cells.

Further, the cell interconnect assembly 100 comprises a thermal relay layer 104, positioned over the circuit layer 102. The thermal relay layer 104 is adapted to be electrically insulated to the circuit layer 102, and to be thermally coupled with the circuit layer 102, so as to relay the heat extracted from the plurality of cells and the circuit layer 102 to a heat exchanger external to the cell interconnect assembly 100 without leaking electric current into the heat exchanger. The base layer 103 is adapted to facilitate transfer of heat from the conductor layer 101 to the thermal relay layer 104. In an embodiment, the thermal relay layer 104 comprises one or more of thermal pad, a thermal adhesive, metal composite layer, inorganic phase changing layer etc.... that is electrically insulative and with high thermal conductivity. The heat exchanger comprises at least one of a heat sink or a thermally conductive device associate with a cooling mechanism adapted to cool the thermally conductive device using passive flow of air, forced flow of air, a liquid coolant, a heat extraction tube, or combination thereof.

In an embodiment, for the assembly of the battery pack, the plurality of cells are arranged in a cell holder with the corresponding tabs facing away from the cell holder. The cell holder is place in a batter casing. To enable electrical contact for the plurality of cells the cell interconnect assembly 100 is placed on top of the plurality of cell terminals such as the plurality of flaps 105 are facing the corresponding tabs of the plurality of cells. A specified pressure is applied onto this cell interconnect assembly 100 when fastening the battery casing for packaging, which will force the neck of the electromechanical flaps 105 to flex to the desired extent so as to let the flaps flat surface come in contact with the terminals due to a calculated pressure exerted by an external force created onto the conductor layer 101 of the cell interconnect assembly 100 by the fastening of the outer casing. The contact created will be done so only because of the external pressure, so as to electrically conduct the designed amount of voltage and current through the metal conductor layer 101. There will be minimal contact established onto the cell’s terminals without the application of external pressure, thereby preventing sparking/short-circuiting of the plurality of cells and not producing the required voltage and current at the output. The material properties in the metal conductor layer 101 also possess thermal conductivity properties that allow the heat to be conducted via the plurality of flaps 105 away from the cell(s) tabs of plurality of cells. Therefore, the cell interconnect assembly 100 not only allows for the battery pack to be assembled safely, but also ensures serviceability of the individual cells as there is no weld connection/residue on the terminal as well as not welds physically holding the cell to the bus-bar. This allows for easy removal of the individual cell(s) that are not functioning properly.

Figure 2 illustrates an exemplary environment 200 of a cell interconnect assembly 100,203 according to one or more embodiments of the present disclosure. In accordance with an embodiment, an electric vehicle system is provided. The electric vehicle system includes a chassis 201. The chassis 201 is configured to provide a structure to the electric vehicle. The electric vehicle also includes at least one controller operatively coupled within the chassis 201. The at least one controller is configured to control a plurality of electronic components within the electric vehicle. The battery pack 202 includes a cell interconnect assembly 100,203 as describes above. The cell interconnect assembly 100,203 is a composite printed circuit board (CPCB) according an embodiment of the present invention. To prevent the heating of the battery pack 202 a cooling mechanism is employed to regulate the temperature in the battery pack 202. According to an embodiment, the cell interconnect assembly 100,203 of the battery pack 202 is thermally coupled to a flid-based cooling device 204 in the electric vehicle through the heat exchanger. The cell interconnect assembly 100,203 as described in this disclosure is configured to connect electrically and thermally to each of the tabs of the plurality of cells and extract the heat away from the cells. The circuit layer 102 provides electrical isolation to prevent short circuiting and propagation of thermal runaway, where the through-holes in the base layer 103 and the circuit layer 102 (according to an embodiment) facilitate the transfer of heat from the tabs of the plurality of cells to the thermal relay layer 104, which further being thermally connected to the heat exchanger, transfers the heat thus extracted to the heat exchanging while providing electrical insulation. The heat exchange in accordance with an embodiment comprises at least one of a heat sink or a thermally conductive device associate with a flid-based cooling device adapted to cool the thermally conductive device using passive flow of air, forced flow of air, a liquid coolant, a heat extraction tube, or combination thereof. The flid-based cooling device 204 comprises a one or more peripheral devices 205 and the at least one controller, configured to draw heat away from the cell interconnect assembly 100,203 by regulating the flow of the fluid, temperature of the fluid or combination thereof using the one or more peripheral devices 205. In an embodiment, the plurality of electronic components in the electric vehicle includes one or more peripheral devices 205. Further in another embodiment, the one or more peripheral devices 205 may not be associated to the vehicle but just the flid-based cooling device 204. The one or more peripheral devices 205 comprises one or more thermal sensors 207, a fan, a liquid coolant, a heat extraction tube, an air blower, radiators, thermocouples or a combination thereof. The electric vehicle system also includes a battery pack 202 operatively coupled to the at least one controller. The controller is configured to receive at least a generated temperature data from one or more thermal sensors 207, compare the generated temperature data with a predefined temperature data value and to regulate the functioning of the flid-based cooling device 204 based on the comparison using the one or more peripheral devices 205 of the flid-based cooling device 204, thereby maintaining the operational temperature of the plurality of cells by tab cooling. In an embodiment, a one or more of sensors are including in the one or more peripheral devices comprising humidity sensor, current sensor etc... to facilitate better operation of the battery pack. Equivalents:

The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the 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.

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 preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein. Throughout this specification, the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.

The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.

Any discussion of documents, acts, materials, devices, articles and the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.

The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary. While considerable emphasis has been placed herein on the particular features of this disclosure, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other modifications in the nature of the disclosure or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.

Claims

WE CLAIM:

1. A cell interconnect assembly (100) for a battery pack (202) having a plurality of cells, the assembly comprising: a conductor layer (101) bonded to a base layer (103), is adapted to be in thermo-electrical coupling with a corresponding tab of the plurality of cells of the battery pack (202), so as to electrically interconnect the cells and also to draw out heat generated by the cells; a circuit layer (102) electrically coupled with the conductor layer (101) and physically bonded to the base layer (103) on at least one side is adapted to provide electrical isolation and prevent propagation of thermal runaway; and a thermal relay layer (104), positioned over the circuit layer (102), is adapted to be electrically insulated to the circuit layer (102), and to be thermally coupled with the circuit layer (102), so as to relay the heat extracted from the plurality of cells and the circuit layer (102) to a heat exchanger external to the cell interconnect assembly (100) without leaking electric current into the heat exchanger, wherein the base layer (103) is adapted to facilitate transfer of heat from the conductor layer (101) to the thermal relay layer (104).

2. The cell interconnect assembly (100) as claimed in claim 1, wherein the conductor layer (101) is in thermo-electrical coupling with a corresponding tab of the plurality of cells via a plurality of flaps (105) with flat projections that are comprised in the conductor layer (101).

3. The cell interconnect assembly (100) as claimed in claim 2, wherein the circuit layer (102) is divided into plurality of sections electrically insulated from each other, wherein each of the plurality of sections are connected to the plurality of flaps (105) in the conductor layer (101).

4. The cell interconnect assembly (100) as claimed in claim 1, wherein each of the plurality of flaps (105) comprises a neck region that connects the flap (105) to the conductor layer (101), wherein the neck region is configured to function as a fusible link, so as to melt down in an event of short circuit of a corresponding cell from the plurality of cells.

5. The cell interconnect assembly (100) as claimed in claim 1, wherein the base layer (103) comprises one or more through-holes, wherein the through holes facilitate the transfer of heat from the plurality of flaps (105) in the conductor layer (101) to the thermal relay layer (104).

6. The cell interconnect assembly (100) as claimed in claim 1 , wherein the heat exchanger comprises at least one of a heat sink or a thermally conductive device associate with a cooling mechanism adapted to cool the thermally conductive device using passive flow of air, forced flow of air, a liquid coolant, a heat extraction tube, or combination thereof.

7. The cell interconnect assembly (100) as claimed in claim 1, wherein the plurality of flaps (105) in the conductor layer (101) of the cell interconnect assembly (100) is configured to establish a surface contact with the corresponding tabs of the plurality of cells only when a pressure is applied axially over the cell interconnect assembly (100) resulting from fastening of an outer casing of the battery pack (202).

8. The cell interconnect assembly (100) as claimed in claim 1, wherein the cell interconnect assembly (100) is prefabricated so as to enable ease in assembly and serviceability of the battery pack (202).

9. The cell interconnect assembly (100) as claimed in claim 1, wherein the cell interconnect assembly (100) is thermally coupled to a flid-based cooling device (204) through the heat exchanger, wherein the flid-based cooling device (204) comprises a one or more peripheral devices (205); and a controller, configured to draw heat away from the cell interconnect assembly (100) by regulating the flow of the fluid, temperature of the fluid or combination thereof using the one or more peripheral devices (205). The cell interconnect assembly (100) as claimed in claim 9, wherein the one or more peripheral devices (205) comprises one or more thermal sensors (207), a fan , a liquid coolant, a heat extraction tube, or a combination thereof, wherein the controller is configured to receive at least a generated temperature data from one or more thermal sensors (207), compare the generated temperature data with a predefined temperature data value and to regulate the functioning of the fluid based device based on the comparison using the one or more peripheral devices (205) of the fluid-based cooling device (204).