Description:BACKGROUND
[0001]
In secondary cells, specifically cylindrical cells, various components (electrodes, separators, electrolyte, current collector plates) are arranged in a 5 "jelly roll" assembly, wherein the electrodes and separators are wound around a central mandrel. At each end of the jelly roll assembly, current collector plates are placed which serve as an interface between the electrodes and terminals of the cell. A current collector plate is a conductive component designed to collect and distribute electrical current within the electrochemical cell. The current collector 10 plates are placed at both ends of the jelly roll assembly to facilitate flow of electrons between the electrodes and external components of the electrochemical cell (such as external circuitry) and play a crucial role in ensuring performance and reliability of the electrochemical cell by distributing current across the surface of the electrode. 15
BRIEF DESCRIPTION OF DRAWINGS
[0002]
The detailed description is provided with reference to the accompanying figures, wherein:
[0003]
FIG. 1A illustrates a current collector plate, as per examples of the present subject matter; 20
[0004]
FIG. 1B illustrates a perspective view of the plurality of connecting members, as per examples of the present subject matter;
[0005]
FIG. 1C illustrates a side view of the plurality of connecting members, as per examples of the present subject matter;
[0006]
FIG. 2 illustrates a sectional view of the current collector plate, as 25 per examples of the present subject matter;
[0007]
FIG. 3 illustrates placement of a current collector plate with respect to a cylindrical cell, as per examples of the present subject matter; and
[0008]
FIGS. 4A-4B illustrates a sectional view of a cylindrical cell, as per examples of the present subject matter. 30 2
[0009]
It may be noted that throughout the drawings, identical reference numbers designate similar, but not necessarily identical, elements. The figures are not necessarily to scale, and the size of some parts may be exaggerated to more clearly illustrate the example shown. Moreover, the drawings provide examples and/or implementations consistent with the description; however, the 5 description is not limited to the examples and/or implementations provided in the drawings.
DETAILED DESCRIPTION
[0010]
Generally, an energy storage device such as a rechargeable battery (also known as a secondary storage battery) is a battery which is charged 10 and discharged repeatedly. The rechargeable battery is composed of one or more electrochemical cells in which electrochemical reactions occur. Some of the basic components of an electrochemical cell include electrodes (anode and cathode), a separator, an electrolyte, and current collector plates. During charging, electrons flow from the cathode to the anode, causing a chemical 15 change in material of the electrodes, wherein energy is stored. When the battery is discharged, electrons flow from the anode to the cathode, releasing the stored energy as electrical current. The electrolyte facilitates the movement of ions between the electrodes, while the separator prevents a direct contact between the anode and cathode during ion transfer. 20
[0011]
As may be understood, the current collector plate serves as an electrical interface between electrodes (in the jelly roll assembly) and external components of the electrochemical cells. The current collector plates provide mechanical stability to the jelly roll assembly and helps maintain alignment and compression of internal components. The current collector plates also aid in 25 temperature regulation within the electrochemical cell by allowing heat to dissipate away from the electrodes.
[0012]
Although current collector plates are designed to serve as the electrical interface between the electrodes , conventional current collector plates have certain limitations, for example, thermal fluctuations, mechanical 30 3
stress during charging/ discharging cycles, electrical resistance at contact points, and manufacturing tolerance variations. Conventional current collector plates are typically rigid solid discs that lack necessary flexibility to accommodate thermal fluctuations within the electrochemical cell. Particularly, during thermal expansion and contraction cycles, internal components of the electrochemical cells undergo 5 dimensional changes, leading to inconsistent electrical contact with surfaces of the electrodes. Such dimensional changes may hinder the ability of the current collector plates to maintain a uniform seal around edges of the electrochemical cell.
[0013]
Conventional current collector plates may also exhibit limited 10 current carrying capacity due to several structural and material constraints. Since conventional current collector plates typically maintain electrical contact only at specific points or regions, an effective current collection area may be reduced compared to a total surface area of the electrode. This reduced contact area may create current bottlenecks limiting an overall current flow through the 15 electrochemical cell. Such inconsistent contact may result in localized areas of high resistance, leading to an uneven current distribution within the electrochemical cell.
[0014]
Localized areas of high resistance, in the present context, refer to specific regions within the current collector plate where electrical resistance is 20 higher than surrounding areas. In conventional rigid current collector plates, localized areas of high resistance may form when the current collector plate cannot maintain a uniform contact pressure across the surface of the electrodes. Due to an inflexible nature of conventional current collector plates, certain regions may experience poor electrical contact while other areas maintain good electrical 25 contact. The regions with poor contact may exhibit higher electrical resistance because the flow of electrical current is through smaller contact areas or through less conductive pathways.
[0015]
Additionally, mechanical stresses induced in conventional current collector plates during external vibrations may accelerate material fatigue and 30 4
degradation, potentially shortening an operational lifespan of the cell. Furthermore, the rigid nature of conventional current collector plates may pose challenges in manufacturing, making it difficult to accommodate production tolerances and ensure consistent performance across large-scale manufacturing. Accordingly, there is a need for an efficient current collector plate for addressing 5 the above-mentioned technical limitations associated with conventional current collector plates.
[0016]
Examples of a current collector plate for a cylindrical cell are described. In one example, the cylindrical cell comprises a plurality of internal components such as a jelly roll assembly. The jelly roll assembly comprises 10 alternating layers of positive and negative electrodes, separated by a separator component. The jelly roll assembly is immersed in an electrolyte for facilitating movement of ions between the positive and negative electrodes. The jelly roll assembly is placed within a cylindrical metal casing (also referred to as a can), that provides structural support and containment of the internal components 15 within the cylindrical cell. At each end of the jelly roll assembly, a current collector plate is placed, that serves as an interface between the positive and negative electrodes and external terminals associated with the cylindrical cell.
[0017]
In one example, the current collector plate comprises a circular disc, at a first plane, whose centre is aligned with a longitudinal axis of the 20 cylindrical cell. The circular disc has a first radius corresponding to a partial radius of the cylindrical cell. This implies that the circular disc does not extend across a radius of the cylindrical cell but rather covers a portion of a cross-sectional area of the cylindrical cell. The current collector plate further comprises an annular ring at a second plane. In one example, the annular ring is positioned such that an 25 inner periphery of the annular ring is aligned with an outer periphery of the circular disc along a longitudinal axis of the cylindrical cell. The annular ring has a width corresponding to a difference between the radius of the cylindrical cell and the first radius of the circular disc. It may be noted that the circular disc is designed in a manner to create space for the annular ring, which is to occupy a remaining 30 5
area between the outer periphery of the circular disc and an inner wall of the cylindrical cell.
[0018]
In one example, the first plane (at which the circular disc is placed) is parallel to the second plane (at which the annular ring is placed) and is separated by a predefined distance along the longitudinal axis of the cylindrical 5 cell.
[0019]
In one example, the current collector plate further comprises a plurality of connecting members to movably couple the circular disc and the annular ring. Each of the plurality of connecting members has a first end and a second end. In one example, the first end of each of the plurality of connecting 10 members is connected to the outer periphery of the circular disc, and the second end (of each of the plurality of connecting members) is connected to the inner periphery of the annular ring. The connection of the first end and the second end is such that when the circular disc is subjected to a force (external or internal), the plurality of connecting members may extend or contract to vary the pre-15 defined distance of separation of the circular disc and the annular ring. The variation of the pre-defined distance may be along the longitudinal axis of the cylindrical cell.
[0020]
In one example, each of the plurality of connecting members comprises a first curved portion, a second curved portion, and an intermediate 20 curved portion. The first curved portion extends from the first end (connected to the outer periphery of the circular disc of the current collector plate). The second curved portion extends from the second end (connected to the inner periphery of the annular ring of the current collector plate). The intermediate curved portion is to connect the first curved portion and the second curved portion, such that when 25 connected, the first curved portion, the second curved portion, and the intermediate curved portion forms a continuous S-shaped cross-section, along the longitudinal axis of the cylindrical cell.
[0021]
During operation, when the cylindrical cell experiences mechanical shocks due to external vibrations, the plurality of connecting members act as a 30 6
shock absorber and deforms to dissipate energy. The deformation of the plurality of connecting members is due to the circular disc and the annular ring being placed in different planes (first plane and second plane), separated by the pre-defined distance therein. This pre-defined distance enables compression of the current collector plate, causing the circular disc to compress towards the annular 5 ring (such that each of the plurality of connecting members also move). As the circular disc and the annular ring are placed in different planes, there is an area formed between the internal components (for example, an electrode assembly) of the cylindrical cell and the current collector plate. Accordingly, even if the circular disc is compressed towards the annular ring, the area formed therein 10 does not affect integrity of the internal components of the cylindrical cell.
[0022]
Similarly, as the cylindrical cell undergoes thermal fluctuations during charging and discharging cycles, the plurality of connecting members is such that each connecting member enables the circular disc to move relative to the annular ring, along the longitudinal axis of the cylindrical cell. Such a 15 movement varies the pre-defined distance between the first plane and the second plane (at which the circular disc and the annular ring are placed, respectively). Even as internal components of the cylindrical cell expand or contract, the adaptive movement of the connecting members is such that thermal stresses (due to the thermal fluctuations within the cylindrical cell) are evenly distributed 20 across the cell, reducing a risk of areas having high resistance being formed within the cell.
[0023]
The above aspects are further described in conjunction with the figures, and in associated description below. It should be noted that the description and figures merely illustrate principles of the present subject matter. 25 Therefore, various assemblies that encompass the principles of the present subject matter, although not explicitly described or shown herein, may be devised from the description and are included within its scope.
[0024]
FIG. 1A illustrates a current collector plate 100, as per examples of the present subject matter. The current collector plate 100 comprises a circular 30 7
disc 102, at a first plane, whose centre is aligned with a longitudinal axis of a cylindrical cell (not shown). The circular disc 102 has a first radius (R1) corresponding to a partial radius of the cylindrical cell. The current collector plate 100 further comprises an annular ring 104 at a second plane (not shown). The annular ring 104 is positioned such that an inner periphery 106 of the annular ring 5 104 is aligned with an outer periphery 108 of the circular disc 102 along the longitudinal axis of the cylindrical cell.
[0025]
In an example, a width of the annular ring 104 may correspond to a difference between a radius of the cylindrical cell and the first radius ‘R1’ of the circular disc 102. In one example, the first radius ‘R1’ may be 40-60% of the 10 dimension to a radius of the cylindrical cell. This implies that the first radius 'R1' of the circular disc 102 is 40-60% of the dimension of the radius of the cylindrical cell, such that the circular disc 102 covers only a portion of the cell's cross-sectional area, without deviating from the scope of the present subject matter.
[0026]
In one example, the current collector plate 100 may be made of 15 sheet metal. The sheet metal may be selected from a group comprising one of copper, aluminium, and nickel-plated copper material.
[0027]
In one example, the current collector plate 100 is formed by an industrial process of stamping and blanking. The process involves using precision dies to cut and shape a sheet of conductive metal into a desired form of the 20 current collector plate, as per the present examples. The process includes initial stamping to create the basic circular shape, followed by a plurality of secondary operations to form a plurality of connecting members, without deviating from the scope of the present subject matter. This process allows for efficient production of the current collector plate 100 having complex geometries (placement of each 25 connecting member 110) required for their function in the cylindrical cell.
[0028]
Based on the examples provided herein, the current collector plate 100 may be either an anode disc or a cathode disc, placed on either ends of a jelly roll assembly of the cylindrical cell. 8
[0029]
In one example, the circular disc 102 has a contact area (for establishing an electrical connection with external circuitry so as to enhance the current-carrying capacity of the current collector plate 100. For example, the contact area of the circular disc 102 provides a contact interface with an electrode assembly of the cylindrical cell, allowing for efficient current collection and 5 distribution.
[0030]
In one example, the circular disc 102 may further comprise a top rivet mating surface to facilitate an electrical connection with external terminals of the cylindrical cell. The top rivet mating surface may be positioned at a central region of the circular disc 102 and is to receive a rivet or fastening element for 10 establishing electrical continuity between the current collector plate 100 and external circuitry. The large contact area of the circular disc 102 may ensure efficient current collection, and allow the current collector plate 100 to handle higher current loads while maintaining stable electrical performance throughout the operational life of the cylindrical cell. 15
[0031]
Returning to the present example, the current collector plate 100 further comprises a plurality of connecting members 110-1, 110-2, 110-3 (collectively referred as 110) to movably couple the circular disc 102 and the annular ring 104, as will be further explained in conjunction with FIG. 1B.
[0032]
FIG. 1B illustrates a perspective view of the plurality of connecting 20 members 110, as per examples of the present subject matter. In one example, each of the plurality of connecting members 110 has a first end 112 and a second end 114. The first end 112 of each of the plurality of connecting members 110 is connected to the circular disc 102 and the second end 114 (of each of the plurality of connecting members 110) is connected to the annular ring 104. The connection 25 of the first end 112 and the second end 114 is such that when the circular disc 102 is subjected to a force (external or internal), the plurality of connecting members 110 may extend or contract to vary a distance of separation between the circular disc 102 and the annular ring 104. The variation of the distance may be along the longitudinal axis of the cylindrical cell. 30 9
[0033]
In one example, the distance may vary in a range of about 0.2 millimetres (mm) to 0.8 millimetres, without deviating from the scope of the present subject matter. For example, when the cylindrical cell is in its initial state or under minimal stress, the distance or gap between the circular disc 102 and the annular ring 104 may be about 0.6-0.8 mm, allowing for maximum flexibility 5 and adaptability of the current collector plate 100. In cases of maximum expansion or stress, the distance may decrease to 0.2 mm-0.4 mm, with each of the connecting members 110 absorbing mechanical stress and maintaining electrical contact with internal and external components of the cylindrical cell.
[0034]
In one example, the plurality of connecting members 110 define a 10 series of openings between the circular disc 102 and the annular ring 104, when positioned between the circular disc 102 and the annular ring 104.
[0035]
In one example, the current collector plate 100 may include at least two connecting members 110. The plurality of connecting members 110 may be spaced equidistantly in a radial direction between the circular disc 102 and the 15 annular ring 104. For example, such openings may be formed as a result of each connecting member 110 placed between the outer periphery of the circular disc 102 and the inner periphery of the annular ring 104. These openings may allow for greater flexibility and deformation of the connecting members 110, enabling the plate to better accommodate dimensional changes within the cylindrical cell. 20
[0036]
FIG. 1C illustrates a side view of the plurality of connecting members 110, as per examples of the present subject matter. In one example, each of the plurality of connecting members 110 comprises a first curved portion 116, a second curved portion 118, and an intermediate curved portion 120. The first curved portion 116 extends from the first end 112 (connected to the outer 25 periphery of the circular disc 102 of the current collector plate 100). The second curved portion 118 extends from the second end 114 (connected to the inner periphery of the annular ring 104 of the current collector plate 100). It may be noted that the first end 112 of each connecting member 110 is integrally formed with and extends from the outer periphery of the circular disc 102, while the 30 10
second end 114 of each connecting member 110 is integrally formed with and extends from the inner periphery of the annular ring 104. This integral formation is a result of the current collector plate 100 being manufactured as a single piece from sheet metal, using the stamping and blanking process as described in conjunction with FIG. 1A. 5
[0037]
In one example, the intermediate curved portion 120 is to connect the first curved portion 116 and the second curved portion 118, such that when connected, the first curved portion 116, the second curved portion 118, and the intermediate curved portion 120 forms a continuous S-shaped cross-section, along the longitudinal axis of the cylindrical cell. It is pertinent to note that both 10 the circular disc 102 and the annular ring 104 are situated at different planes which are parallel to each other. The formation of the S-shaped cross section along the longitudinal axis of the cylindrical cell is due to the first curved portion 116, the second curved portion 118, and the intermediate curved portion 120, connecting the first curved portion 116 and the second curved portion 118. The 15 S-shaped cross section of the connecting member 110 is such that it forms a plurality of openings in the current collector plate and appears to form a radially spiral shape around the outer periphery 108 of the circular disc 102.
[0038]
FIG. 2 illustrates a sectional view 200 of the current collector plate 100, as per examples of the present subject matter. As shown in FIG. 2, the 20 circular disc 102 is at a first plane 202. The annular ring 104 is at a second plane 204. The first plane 202 is parallel to the second plane 204 (at which the annular ring 104 is placed). The first plane 202 and the second plane 204 are separated by a pre-defined distance 206 along the longitudinal axis of the cylindrical cell.
[0039]
As shown in FIG. 2, the circular disc 102 and the annular ring 104 25 are positioned at different planes, separated by the pre-defined distance 206 along the longitudinal axis of the cylindrical cell. This structural arrangement allows for axial movement between the circular disc 102 and the annular ring 104, facilitated by the flexible connecting members (not shown in this view). Such a design enables the current collector plate 100 to dynamically respond to internal 30 11
pressures and dimensional changes within the cylindrical cell, maintaining optimal electrical contact and structural integrity throughout various operational conditions. The parallel alignment of the first plane 202 and second plane 204 further ensures uniform distribution of forces across the current collector plate 100, contributing to an overall structural stability and performance within the 5 cylindrical cell.
[0040]
FIG. 3 illustrates placement of a current collector plate with respect to a cylindrical cell 300, as per examples of the present subject matter. As shown in FIG. 3, the current collector plate 302, 310 (same as current collector plate 100) may be electrically connected to either side of an electrode assembly, such 10 as a jelly roll 304, before the jelly roll 304 is placed inside a protective casing (also known as a can). The current collector plate 302 may pertain to an anode disc and the current collector plate 310 may pertain to a cathode disc, placed on either side of the electrode assembly. Such an assemblage of the jelly roll 304 and the current collector plate 302 forms an electrochemical cell. As described with 15 reference to FIGS. 1 to 2, the current collector plate 302 comprises a circular disc 306 (similar to the circular disc 102) and an annular ring 308 (similar to the annular ring 104) and is used to seal the jelly roll 304 and help establish an electrical connection with external terminals of the cylindrical cell 300.
[0041]
As further depicted in FIG. 3, the current collector plate 302 is 20 placed on the jelly roll assembly 304 such that centre of the current collector plate 302 aligns with that of the jelly roll assembly 304 (shown in reference axes—x-axis and y-axis). The longitudinal axis of the cylindrical cell within which the jelly roll 304 is placed aligns with Y-axis depicted in FIG. 3.
[0042]
In one example, the current collector plate 302 and 310 further 25 comprises a plurality of grooves 312, around an outer periphery of the current collector plate. The plurality of grooves 312 may be a structural element of the current collector plate 302, 310 that facilitates precise positioning and alignment of the current collector plate 302, 310 within the cylindrical cell 300. 12
[0043]
In one example, the current collector plate 302 is positioned such that the circular disc 306 is in direct contact with the external terminal . The annular ring 308 of the current collector plate 302 is in direct contact with the jelly roll assembly 304. . This placement allows the current collector plate 302 to effectively collect and distribute current across the electrode surfaces while also 5 accommodating the dimensional changes that occur within the cell during operation.
[0044]
FIGS. 4A-4B illustrates a sectional view of a cylindrical cell 400, as per examples of the present subject matter. As shown in FIGS. 4A-4B, a current collector plate 402 (same as current collector plate 100) is placed on either side 10 of a jelly roll assembly 404. The current collector plate 402 and the jelly roll assembly 404 are placed inside a cylindrical protective casing 406, which forms the cylindrical cell 400.
[0045]
As shown in FIGS. 4A-4B, the current collector plate 402 is strategically positioned on either side of the jelly roll assembly 404 within the 15 cylindrical protective casing 406 of the cylindrical cell 400. This placement allows the current collector plate 402 to effectively interface between the internal electrodes and the external terminals of the cylindrical cell 400. The unique design of the current collector plate 402, with its flexible connecting members between the circular disc and annular ring (not visible in this view), enables the 20 current collector plate 402 to accommodate thermal expansions and contractions of the jelly roll assembly 404 during cell operation.
[0046]
The present subject matter offers numerous technical advantages. For example, the current collector plate 402 is designed to adapt to dimensional changes within the cylindrical cell 400 during thermal fluctuations and mechanical 25 stresses. These dimensional variations may be present in the jelly roll and are referred to as jelly roll tolerances. The ability of the connecting members (not shown in this view) to extend or contract ensures consistent electrical contact with the electrode surfaces, thereby reducing the risk of localized high-resistance areas and improving current distribution across the cell. Further, the S-shaped 30 13
profile of the connecting members provides improved shock absorption, protecting the internal components from external vibrations and impacts.
[0047]
Although aspects and other examples have been described in a language specific to structural features and/or methods, the present subject matter is not necessarily limited to such specific features or elements as 5 described. Rather, the specific features are disclosed as examples and should not be construed to limit the scope of the present subject matter.
14
I/We Claim:
1. A current collector plate (100) for a cylindrical cell comprising
a circular disc (102) at a first plane (202), wherein a centre of the circular disc (102) is aligned with a longitudinal axis of the cylindrical cell, 5 the circular disc (102) having a first radius corresponding to a partial radius of the cylindrical cell;
an annular ring (104) at a second plane (204) positioned such that an inner periphery (106) of the annular ring (104) is aligned with an outer periphery (108) of the circular disc (102) along the longitudinal axis, 10 wherein the annular ring (104) has a width corresponding to a difference between a radius of the cylindrical cell and the first radius,
wherein the first plane (202) is parallel to the second plane (204) and is separated from the second plane (204) by a pre-defined distance (206) along the longitudinal axis; and 15
a plurality of connecting members (110) to movably couple the circular disc (102) and the annular ring (104), each of the plurality of connecting members (110) having a first end (112) and a second end (114),
wherein the first end (112) of each of the plurality of connecting 20 members (110) is connected to the outer periphery (108) of the circular disc (102) and the second end (114) is connected to the inner periphery (106) of the annular ring (104), such that upon the circular disc (102) being subjected to a force, the plurality of connecting members (110) extend or contract to vary the pre-defined distance (206) of separation of the circular 25 disc (102) and the annular ring (104), along the longitudinal axis of the cylindrical cell.
2. The current collector plate (100) as claimed in claim 1, wherein each of the plurality of connecting members (110) comprises: 30 15
a first curved portion (116), an intermediate curved portion (120), and a second curved portion (118),
wherein the first curved portion (116) extends from the first end (112) connected to the outer periphery (108) of the circular disc (102), and the second curved portion (118) extends from the second end (114) 5 connected to the inner periphery (106) of the annular ring (104), such that the intermediate curved portion (120) connects the first curved portion (116) and the second curved portion (118),
wherein when connected, the first curved portion (116), the second curved portion (118), and the intermediate curved portion (120) forms a 10 continuous S-shaped cross-section.
3. The current collector plate (100) as claimed in claim 1, wherein the first radius is 40-60% of a radius of the cylindrical cell.
15
4. The current collector plate (100) as claimed in claim 1, wherein the pre-defined distance (206) of separation of the circular disc (102) and the annular ring (104) varies between 0.2 millimetres (mm) to 0.8 mm.
5. The current collector plate (100) as claimed in claim 1, wherein the 20 current collector plate (100) is made of sheet metal, wherein the sheet metal is one of copper, aluminium, and nickel-plated copper material.
6. The current collector plate (100) as claimed in claim 1, wherein the current collector plate (100) is formed by a process of stamping and 25 blanking.
7. The current collector plate (100) as claimed in claim 1, wherein the current collector plate (100) is one of an anode disc and a cathode disc for the cylindrical cell. 30 16
8. The current collector plate (100), as claimed in claim 1, wherein the plurality of connecting members (110) defines a series of openings between the circular disc (102) and the annular ring (104), when positioned between the circular disc (102) and the annular ring (104). 5
9. The current collector plate (100) as claimed in claim 1, wherein the plurality of connecting members (110) is at least two, spaced equidistantly in a radial direction between the circular disc (102) and the annular ring (104). 10
17
ABSTRACT
CURRENT COLLECTOR PLATES FOR SECONDARY CELLS
Examples of a current collector plate (100) for a cylindrical cell are described. In one example, the current collector plate (100) comprises a circular 5 disc (102), at a first plane (202), whose centre is aligned with a longitudinal axis of the cylindrical cell. The circular disc (102) has a first radius corresponding to a partial radius of the cylindrical cell. The current collector plate (100) further comprises an annular ring (104) at a second plane (204). The annular ring (104) is positioned such that an inner periphery (106) of the annular ring (104) is aligned 10 with an outer periphery (108) of the circular disc (102) along the longitudinal axis of the cylindrical cell. The current collector plate (100) further comprises a plurality of connecting members (110) to movably couple the circular disc (102) and the annular ring (104).
15
<>
18 , Claims:I/We Claim:
1. A current collector plate (100) for a cylindrical cell comprising
a circular disc (102) at a first plane (202), wherein a centre of the circular disc (102) is aligned with a longitudinal axis of the cylindrical cell, 5 the circular disc (102) having a first radius corresponding to a partial radius of the cylindrical cell;
an annular ring (104) at a second plane (204) positioned such that an inner periphery (106) of the annular ring (104) is aligned with an outer periphery (108) of the circular disc (102) along the longitudinal axis, 10 wherein the annular ring (104) has a width corresponding to a difference between a radius of the cylindrical cell and the first radius,
wherein the first plane (202) is parallel to the second plane (204) and is separated from the second plane (204) by a pre-defined distance (206) along the longitudinal axis; and 15
a plurality of connecting members (110) to movably couple the circular disc (102) and the annular ring (104), each of the plurality of connecting members (110) having a first end (112) and a second end (114),
wherein the first end (112) of each of the plurality of connecting 20 members (110) is connected to the outer periphery (108) of the circular disc (102) and the second end (114) is connected to the inner periphery (106) of the annular ring (104), such that upon the circular disc (102) being subjected to a force, the plurality of connecting members (110) extend or contract to vary the pre-defined distance (206) of separation of the circular 25 disc (102) and the annular ring (104), along the longitudinal axis of the cylindrical cell.
2. The current collector plate (100) as claimed in claim 1, wherein each of the plurality of connecting members (110) comprises: 30 15
a first curved portion (116), an intermediate curved portion (120), and a second curved portion (118),
wherein the first curved portion (116) extends from the first end (112) connected to the outer periphery (108) of the circular disc (102), and the second curved portion (118) extends from the second end (114) 5 connected to the inner periphery (106) of the annular ring (104), such that the intermediate curved portion (120) connects the first curved portion (116) and the second curved portion (118),
wherein when connected, the first curved portion (116), the second curved portion (118), and the intermediate curved portion (120) forms a 10 continuous S-shaped cross-section.
3. The current collector plate (100) as claimed in claim 1, wherein the first radius is 40-60% of a radius of the cylindrical cell.
15
4. The current collector plate (100) as claimed in claim 1, wherein the pre-defined distance (206) of separation of the circular disc (102) and the annular ring (104) varies between 0.2 millimetres (mm) to 0.8 mm.
5. The current collector plate (100) as claimed in claim 1, wherein the 20 current collector plate (100) is made of sheet metal, wherein the sheet metal is one of copper, aluminium, and nickel-plated copper material.
6. The current collector plate (100) as claimed in claim 1, wherein the current collector plate (100) is formed by a process of stamping and 25 blanking.
7. The current collector plate (100) as claimed in claim 1, wherein the current collector plate (100) is one of an anode disc and a cathode disc for the cylindrical cell. 30 16
8. The current collector plate (100), as claimed in claim 1, wherein the plurality of connecting members (110) defines a series of openings between the circular disc (102) and the annular ring (104), when positioned between the circular disc (102) and the annular ring (104). 5
9. The current collector plate (100) as claimed in claim 1, wherein the plurality of connecting members (110) is at least two, spaced equidistantly in a radial direction between the circular disc (102) and the annular ring (104).