Battery cell cover plate assembly and battery cell

Abstract

The utility model relates to lithium battery technical field provides a kind of electric core cover plate assembly and electric core, electric core cover plate assembly includes cover plate and end plate;Cover plate includes plastic part;Multiple grooves are equipped in plastic part, and every groove is equipped with first limit protruding portion on the inner wall surface of side wall side;End plate is equipped with tab through-hole, and multiple second limit protruding portion is equipped on the side wall end surface of tab through-hole side, and first limit protruding portion and second limit protruding portion one-to-one corresponding cooperation, to limit the degree of freedom of end plate in width direction.The utility model cooperates first limit protruding portion and second limit protruding portion in electric core cover plate assembly, forms the limiting structure in width direction, can effectively prevent the crimping between plastic part in cover plate and end plate and increase electric core short-circuit risk when being easy to misplace, improve electric core cover plate assembly reliability.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a cell cover assembly and a cell. Background Technology

[0002] Lithium-ion batteries have become the representative of modern high-performance batteries due to their advantages such as high operating voltage, high specific energy, large capacity, low self-discharge, good cycle performance, long service life, light weight, and small size.

[0003] In related technologies, the positive electrode cover plate and the end plate are press-fitted together using an extrusion method. However, during actual assembly, the thin wall of the retaining wall structure at the connection point between the end plate and the cover plate, being a narrow, elongated structure, makes the assembly location prone to deformation, causing it to become concave or convex. This can lead to misalignment of the contact surface between the cover plate and the end plate. Furthermore, the electrode tab located below the end plate can easily be squeezed out from this misalignment, resulting in overlap with the outer casing and a high risk of short circuit. Utility Model Content

[0004] This utility model provides a battery cell cover plate assembly and a battery cell to solve the defect in the prior art where misalignment easily occurs at the contact position when the cover plate and the end plate are pressed together.

[0005] The first aspect of this utility model provides a battery cell cover assembly, characterized in that it includes: a cover plate and an end plate; the cover plate includes a plastic part, the plastic part has a plurality of grooves, and each groove has a first limiting protrusion on the inner side wall near the edge in the width direction; the end plate has a tab through hole, and a second limiting protrusion is provided on the side wall end face of the tab through hole, the first limiting protrusion and the second limiting protrusion correspondingly cooperate.

[0006] According to the battery cell cover assembly provided by this utility model, the second limiting protrusion is located on the inner edge of the side wall of the electrode through hole.

[0007] According to the battery cell cover assembly provided by this utility model, the first limiting protrusion has a first inclined surface, the second limiting protrusion has a second inclined surface, the first inclined surface is located outside the second inclined surface, and the first inclined surface cooperates with the second inclined surface for limiting.

[0008] According to the battery cell cover assembly provided by this utility model, the first limiting protrusion includes an inclined chamfer structure, and the side of the chamfer structure facing the second limiting protrusion is the first inclined surface. The second limiting protrusion includes a triangular prism-shaped protrusion structure, and the side of the second limiting protrusion facing the first limiting protrusion is the second inclined surface.

[0009] According to the battery cell cover assembly provided by this utility model, the wall thickness of the tab through hole sidewall is greater than the wall thickness of the groove sidewall, and the outer edge of the tab through hole sidewall in the width direction is located outside the groove sidewall.

[0010] According to the battery cell cover assembly provided by this utility model, the distance between the outer edge of the tab through hole sidewall and the outer surface of the groove sidewall is 0.2-0.3mm.

[0011] According to the battery cell cover assembly provided by this utility model, the wall thickness of the electrode through hole sidewall is 1-1.5mm, and the wall thickness of the groove sidewall is 0.75-1.0mm.

[0012] According to the battery cell cover assembly provided by this utility model, the maximum extension width of the first limiting protrusion in the width direction of the plastic part is 0.3-0.45mm.

[0013] According to the battery cell cover assembly provided by this utility model, the maximum extension width of the second limiting protrusion in the width direction of the end plate is 0.5-1mm.

[0014] The second aspect of this utility model provides a battery cell, including the battery cell cover plate assembly described in any of the above claims.

[0015] The present invention provides a battery cell cover assembly and a battery cell. By cooperating the first limiting protrusion and the second limiting protrusion in the battery cell cover assembly, a limiting structure in the width direction is formed. This can effectively prevent misalignment between the plastic parts and the end plate inside the cover during the pressing process, thereby increasing the risk of short circuit in the battery cell and improving the reliability of the battery cell cover assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the cover plate in the battery cell cover plate assembly provided by this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the middle end plate of the battery cell cover assembly provided by this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the battery cell cover assembly provided by this utility model.

[0020] Figure 4This is a top view of the overall structure of the battery cell cover assembly provided by this utility model.

[0021] Figure 5 This utility model provides Figure 4 Schematic diagram of the cross-sectional structure along the DD direction.

[0022] Figure 6 This utility model provides Figure 5 A magnified structural diagram at point E in the middle.

[0023] Figure 7 This is a schematic diagram of the assembly structure of the battery cell cover plate assembly in related technologies.

[0024] Figure label:

[0025] 1. Cover plate; 11. Plastic part; 12. Plain aluminum plate; 111. Rib structure; 112. Groove; 113. First limiting protrusion; 1131. First inclined surface; 13. Pole post; 2. End plate; 21. Pole ear through hole; 22. Second limiting protrusion; 221. Second inclined surface. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0029] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] In related technologies, such as Figure 7 As shown, the cell cover assembly includes a cover plate, an end plate, and tabs. The cover plate includes a plain aluminum plate, a plastic part 701, and a terminal post. Both the plastic part and the terminal post are connected to the plain aluminum plate, with the plastic part located below the plain aluminum plate. The end plate 702 is connected to the plastic part by pressing. A terminal post groove is formed in the end plate 702, and the tab is located in the terminal post groove. In conventional connection methods, during the connection between the end plate 702 and the plastic part, misalignment can easily occur between the end plate 702 and the plastic part in the width direction. This can easily cause part of the tab to protrude. Since the entire cell is encased in a metal shell, this can lead to a short circuit between the tab and the outer shell, posing a significant safety risk.

[0032] Regarding the problems in related technologies, such as Figures 1-5As shown, this utility model provides a battery cell cover assembly, including a cover plate 1 and an end plate 2. The cover plate 1 includes a plastic part 11. The plastic part 11 has multiple grooves 112, and each groove 112 has a first limiting protrusion 113 on its inner sidewall near the edge in the width direction Y. The end plate 2 has a tab through hole 21, and a multiple second limiting protrusions 22 are provided on the sidewall end face of the tab through hole 21. The first limiting protrusions 113 and the second limiting protrusions 22 are matched one-to-one to restrict the degree of freedom of the end plate 2 and the cover plate 1 in the width direction Y. The overall structural size of the battery cell cover assembly is small, and the end plate 2 is a long strip structure. Therefore, the sidewall of the tab through hole 21 is a narrow strip structure, which is prone to displacement in the width direction Y during the pressing process, thereby increasing the risk of the tab protruding outward. In this example, the first limiting protrusion 113 and the second limiting protrusion 22 cooperate to form a limiting structure in the width direction Y, which can effectively avoid the misalignment between the end plate 2 and the plastic part 11 during the pressing process, and improve the safety of the electric cover plate 1 assembly.

[0033] Specifically, such as Figure 1 As shown, the cover plate 1 has an overall elongated structure, which also includes a bright aluminum plate 12. The plastic part 11 is connected to the bright aluminum plate 12. The plastic part 11 is also provided with a grid-like rib structure 111 and a base plate of the pole post 13. The base plate of the pole post 13 is used to electrically connect with the pole post 13 on the bright aluminum plate 12. The grid-like rib structure 111 forms multiple grooves 112, and a first limiting protrusion 113 is formed in the mating groove near one edge. The end plate 2 has an overall elongated structure. The end plate 2 has a tab through hole 21 in the area corresponding to the grid-like rib structure 111 and the base plate of the pole post 13. The tab through hole 21 is used to set the tab.

[0034] In this embodiment, when the cover plate 1 and the end plate 2 are pressed together, the entire end face of the end plate 2 contacts and connects with the entire end face of the plastic part 11. In this embodiment, by providing a first limiting protrusion 113 and a second limiting protrusion 22 in the corresponding area of ​​the connection position between the two, the two limiting protrusions cooperate during the pressing process, thereby limiting the width direction Y, ensuring that the two will not be misaligned when connected, and preventing the tab from protruding.

[0035] The plastic part 11 is made of rigid plastic, which provides sufficient strength, rigidity, and durability to ensure that the battery cover 1 can withstand external pressure, vibration, impact, and other factors during actual use without deformation or damage. Specifically, engineering plastics or injection-molded rigid plastics can be used. For example, materials such as polypropylene and polycarbonate can be used.

[0036] In specific settings, such as Figure 1As shown, both sides of the base plate of the pole post 13 are provided with grid-like rib structures 111, and the base plate of the pole post 13 is biased towards one end of the plastic part 11. Each of the six grooves 112 formed by the rib structures 111 has a first limiting protrusion 113. Correspondingly... Figure 2 As shown, six second limiting parts are provided on the end face of the side wall where the cover plate 1 and the plastic part 11 are pressed together, so that after the cover plate 1 and the plastic part 11 are pressed together, part of the main body of the first limiting protrusion 113 is located outside the second limiting protrusion 22, thereby achieving limiting in the width direction Y and avoiding misalignment during installation.

[0037] It is understandable that in conventional technical solutions, during the connection of cover plate 1 and end plate 2, the contact surfaces of the cover plate 1 and end plate 2 may become concave or convex under the pressure of compression. If this occurs, misalignment of the connection surfaces will occur, and the tabs may be squeezed out from the misaligned position. Since the entire battery cell is encased in a shell, this can easily lead to a short circuit. In this embodiment, through the cooperation of the first limiting protrusion 113 and the second limiting protrusion 22, such as... Figure 5 As shown, it can play a limiting role in the width direction Y, which can effectively prevent misalignment during the crimping process and improve the safety of the cell cover assembly.

[0038] In a preferred embodiment, the first limiting protrusion 113 is integrally formed with the plastic part 11, and the second limiting protrusion 22 is integrally formed with the end plate 2. This integral forming arrangement enhances the structural strength of the sidewall on each side, further preventing sidewall deformation.

[0039] Specifically, a first limiting protrusion 113 is formed on the inner wall surface of one side of the plastic part 11. The first limiting protrusion 113 thickens the wall thickness of the side wall, which makes the side wall structure stronger. Correspondingly, the second limiting protrusion 22 can strengthen the structural strength of the corresponding side wall, so that the end face structure of the contacting side walls is stronger during the pressing process, the probability of concavity and convexity is reduced, and the overall structural strength can be further improved.

[0040] It is understandable that the one-piece molding design can improve the structural strength of each sidewall and enhance the stability of their fit, resulting in a more stable structure for the two limiting protrusions to fit together.

[0041] In conjunction with the above embodiments, the second limiting protrusion 22 in the cell cover assembly is located on the inner edge of the sidewall of the tab through hole 21. During the pressing process between the plastic part 11 and the end plate 2, the top end face of the sidewall of the tab through hole 21 contacts the corresponding end face of the plastic part 11. In this embodiment, by limiting the second limiting protrusion 22 on the inner edge, a larger contact area can be provided for the press of both, achieving a suitable contact area between the two and improving the quality of the pressing.

[0042] Specifically, the second limiting protrusion 22 is spaced apart along the inner edge, which makes the remaining area of ​​the side wall end face larger, so that it can have a good contact area with the plastic part 11, thereby achieving an effective connection.

[0043] In a specific configuration, the first limiting protrusion 113 has a first inclined surface 1131, and the second limiting protrusion 22 has a second inclined surface 221. The first inclined surface 1131 is located outside the second inclined surface 221, and the first inclined surface 1131 cooperates with the second inclined surface 221 for limiting. During the crimping process, pressure is often applied vertically to connect the components. This embodiment, by providing inclined surface structures on the opposite sides of both the first limiting protrusion 113 and the second limiting protrusion 22, facilitates the crimping process and improves the efficiency and quality of the crimping.

[0044] Specifically, the first inclined surface 1131 and the second inclined surface 221 are arranged in parallel, and after the end plate 2 and the plastic part 11 are connected, the first inclined surface 1131 and the second inclined surface 221 are in contact or have a small gap, which allows the two limiting protrusions to restrict the degree of freedom in the width direction Y and avoid misalignment in the width direction Y.

[0045] The first inclined surface 1131 is inclined toward the inside of the groove 112, and the second inclined surface 221 is inclined away from the electrode tab through hole 21, so that the inclined surfaces of the two come together after they are fitted together and are limited in the width direction Y, so as to avoid misalignment of the contact surface between the end plate 2 and the plastic part 11 during the pressing process.

[0046] In conjunction with the above embodiments, in the specific implementation scheme, the first limiting protrusion 113 includes an inclined chamfered structure, and the side of the chamfered structure facing the second limiting protrusion 22 is a first inclined surface 1131. The second limiting protrusion 22 includes a triangular prism-shaped protrusion, and the side of the second limiting protrusion 22 facing the first limiting protrusion 113 is a second inclined surface 221. During the pressing process, the end plate 2 and the plastic part 11 need to be pressed together by applying force. This embodiment, through the specific chamfered structure and triangular prism-shaped structure, can improve the structural strength of each limiting protrusion and can disperse stress through the cooperation of the inclined surfaces, avoiding damage under pressure.

[0047] Specifically, the second limiting protrusion 22 provides high overall structural strength, and the first limiting protrusion 113 is formed by directly setting a chamfer structure, resulting in high structural strength for the first limiting protrusion 113. Furthermore, during the pressing process, the mutual bevels disperse the applied stress, thereby improving the fit stability of the two limiting protrusions.

[0048] It is understandable that during the pressing process of the plastic parts 11 on the end plate 2 and the cover plate 1, a certain force will be generated between them. If the stress is concentrated at the point where the force is applied, it may lead to structural damage. In this embodiment, a first limiting protrusion 113 is formed by a chamfered structure, and a second limiting protrusion 22 is formed by a triangular prism structure. This makes the structure itself have high strength, and the surfaces where the two contact each other are inclined structures, which can disperse the applied force, avoid excessive stress concentration, and improve the quality of pressing.

[0049] In some embodiments, the wall thickness of the tab through-hole 21 sidewall is greater than the wall thickness of the groove 112 sidewall, and the outer edge of the tab through-hole 21 sidewall in the width direction is located outside the groove 112 sidewall. During the pressing process, the two sides are in surface contact; by increasing the wall thickness of one sidewall, contact stability can be effectively enhanced and force distribution improved.

[0050] Specifically, the sidewall of end plate 2 has a larger wall thickness, which makes the top end face of the sidewall of end plate 2 wider in the width direction Y, providing a larger contact area. This makes the contact stability between end plate 2 and plastic part 11 higher. In addition, this method can reduce local stress concentration, making the pressure during pressing more evenly distributed on the contact surface, avoiding contact surface damage or sidewall deformation caused by excessive local stress.

[0051] In conjunction with the above embodiments, the distance between the outer edge of the sidewall of the tab through hole 21 and the outer surface of the sidewall of the groove 112 is 0.2-0.3 mm. By limiting the distance, the thickness difference between the two is kept within a reasonable range, ensuring it is neither too large nor too small.

[0052] Understandably, the difference in wall thickness between the sidewall of the tab through-hole 21 and the sidewall of the groove 112 should not be too small or too large. If it is too small, it will affect the stress during crimping; if it is too large, it will lead to an excessively large overall structural volume and mass. This example limits the range to keep the distance between the two within a suitable range, thereby balancing the overall volume design and stress design. For example, the distance between the outer edge of the sidewall of the tab through-hole 21 and the outer surface of the sidewall of the groove 112 is 0.2 mm. This maximizes the contact area while avoiding excessive changes in the overall volume.

[0053] In conjunction with the above embodiments, the wall thickness of the sidewall of the tab through-hole 21 is 1-1.5 mm, and the wall thickness of the sidewall of the groove 112 is 0.75-1.0 mm. By limiting the wall thickness values, the performance and safety of the battery cell can be improved, thus enhancing the overall reliability.

[0054] Specifically, the end plate 2 has a thicker sidewall, providing higher mechanical strength and compressive resistance, ensuring the battery cell is less prone to deformation or damage under external forces. The cover plate 1, while meeting strength requirements, features a thinner design, helping to reduce weight and improve product portability. Furthermore, by setting different wall thicknesses, weight and cost can be optimized while maintaining structural stability. In addition, the difference in wall thickness helps improve sealing, ensuring a more reliable seal formed during crimping and preventing leakage or contamination inside the battery. Specifically, the sidewall thickness of the tab through-hole 21 is 1.2mm, and the sidewall thickness of the groove 112 is 0.9mm, thus balancing compressive resistance during crimping with overall lightweight design.

[0055] In conjunction with the above embodiments, the maximum extension width of the first limiting protrusion 113 in the width direction Y of the plastic part 11 is 0.3-0.45mm; the maximum extension width of the second limiting protrusion 22 in the width direction Y of the end plate 2 is 0.5-1mm. The first limiting protrusion 113 is formed by protruding outward from the inner wall surface of the groove 112. This type of structure often has high strength and will not be damaged by force during the pressing process. The second limiting protrusion 22 protrudes from the end face of the end plate 2, and is subjected to greater local stress. This embodiment limits the second limiting protrusion 22 to have a larger limiting width, so that it can have a greater stress bearing capacity and avoid damage or deformation during the pressing process.

[0056] Specifically, the maximum extension width of the first limiting protrusion 113 in the width direction Y is less than the maximum extension width of the second limiting protrusion 22 in the width direction Y, so that the two limiting protrusions will not deform or be damaged during crimping. For example, the maximum extension width of the first limiting protrusion 113 is 0.3mm and the maximum extension width of the second limiting protrusion 22 is 0.8mm. Under these limiting conditions, both can have a high resistance to force during crimping, thus avoiding deformation or damage.

[0057] A second aspect of this utility model provides a battery cell, including the battery cell cover assembly provided in any of the above embodiments. The battery cell includes a housing, an electrode assembly, an electrolyte, a bare battery cell insulating sheet, and a battery cell cover assembly, wherein the battery cell cover 1 adopts the battery cell cover assembly provided in any of the above embodiments.

[0058] Specifically, the battery cell provided in this example has a battery cell cover assembly of any of the aforementioned embodiments. Therefore, the battery cell in this embodiment has the characteristic effects of each of the aforementioned battery cell cover assemblies. To avoid redundancy in the description of the effects, they will not be repeated here.

[0059] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment, through the cooperation of the first limiting protrusion 113 and the second limiting protrusion 22 in the cell cover assembly, forms a limiting structure in the width direction Y, which can effectively prevent misalignment between the plastic part 11 and the end plate 2 in the cover 1 during pressing, thereby increasing the risk of short circuit in the cell and improving the reliability of the cell cover assembly. Furthermore, by limiting the wall thickness of the sidewall of the tab through hole 21 to be different from the wall thickness of the sidewall of the groove 112, the contact area during pressing can be increased, the pressing quality can be improved, and the pressing force can be dispersed.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cell cover assembly, characterized in that, include: A cover plate, the cover plate including a plastic part, the plastic part having a plurality of grooves, each groove having a first limiting protrusion on the inner side wall near the edge in the width direction; The end plate is provided with a tab through hole, and a second limiting protrusion is provided on the side wall end face of one side of the tab through hole. The first limiting protrusion and the second limiting protrusion are correspondingly engaged.

2. The cell cover assembly according to claim 1, characterized in that, The second limiting protrusion is located on the inner edge of the side wall of the electrode through hole.

3. The cell cover assembly according to claim 1 or 2, characterized in that, The first limiting protrusion has a first inclined surface, and the second limiting protrusion has a second inclined surface. The first inclined surface is located outside the second inclined surface, and the first inclined surface cooperates with the second inclined surface for limiting.

4. The cell cover assembly according to claim 3, characterized in that, The first limiting protrusion includes an inclined chamfered structure, and the side of the chamfered structure facing the second limiting protrusion is the first inclined surface. The second limiting protrusion includes a triangular prism-shaped protrusion, and the side of the second limiting protrusion facing the first limiting protrusion is the second inclined surface.

5. The cell cover assembly according to claim 1, characterized in that, The wall thickness of the tab through hole sidewall is greater than the wall thickness of the groove sidewall, and the outer edge of the tab through hole sidewall in the width direction is located outside the groove sidewall.

6. The cell cover assembly according to claim 5, characterized in that, The distance between the outer edge of the tab through hole sidewall and the outer surface of the groove sidewall is 0.2-0.3 mm.

7. The cell cover assembly according to claim 1, characterized in that, The wall thickness of the tab through hole sidewall is 1-1.5mm, and the wall thickness of the groove sidewall is 0.75-1.0mm.

8. The cell cover assembly according to claim 1, characterized in that, The first limiting protrusion has a maximum extension width of 0.3-0.45 mm in the width direction of the plastic part; the second limiting protrusion has a maximum extension width of 0.5-1 mm in the width direction of the end plate.

9. The cell cover assembly according to claim 1, characterized in that, The first limiting protrusion is integrally formed with the plastic part, and the second limiting protrusion is integrally formed with the end plate.

10. A battery cell, characterized in that, Includes the cell cover assembly as described in any one of claims 1-9.

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