Cover plate assembly and battery monomer with same

Abstract

The utility model discloses a cover plate assembly and a battery monomer with the same, the cover plate assembly comprises a cover plate and a pole, and the pole is fixed on the cover plate; and the insulating sheet covers the surface of one side of the cover plate in the thickness direction and is connected with the cover plate. According to the cover plate assembly disclosed by the utility model, the cover plate and the insulating sheet are arranged, and the insulating sheet covers the surface of one side of the cover plate in the thickness direction and is connected with the cover plate, so that the cover plate assembly is simple in structure and convenient to arrange, and the space occupation of the cover plate assembly in the single battery can be greatly reduced, thereby well improving the space utilization rate of the single battery; and the energy density of the battery monomer is well improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a cover plate assembly and a battery cell having the same. Background Art

[0002] With the increasing development and progress of science and technology, batteries are widely used in the fields of vehicles and energy storage. The performance and safety requirements of batteries are increasing day by day. In the related art, the cover plate assembly in the battery cell often needs to be provided with an upper plastic and a lower plastic structure to provide good insulation protection for the battery cell, so that the battery cell has good safety performance. However, the lower plastic structure is relatively large in volume and occupies a large space inside the battery cell, resulting in poor space utilization of the battery cell and low energy density of the battery cell. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a cover plate assembly, which can well reduce the space occupied in the battery cell, thereby well improving the space utilization rate and the energy density of the battery cell.

[0004] The utility model also provides a battery cell having the above cover plate assembly.

[0005] The cover plate assembly according to the first aspect of the utility model includes: a cover plate and a pole column, the pole column is fixed on the cover plate; an insulating sheet, the insulating sheet covers one side surface of the cover plate in the thickness direction and is connected to the cover plate.

[0006] According to the cover plate assembly of the utility model, by providing the cover plate and the insulating sheet, the insulating sheet covers one side surface of the cover plate in the thickness direction and is connected to the cover plate, the structure is simple and the arrangement is convenient. It can greatly reduce the space occupied by the cover plate assembly in the battery cell, thereby well improving the space utilization rate of the battery cell and well improving the energy density of the battery cell.

[0007] In some embodiments of the utility model, the cover plate is provided with a through hole, the through hole penetrates the cover plate along the thickness direction of the cover plate, the pole column is inserted into the through hole, and the cover plate assembly further includes: an insulating member, the insulating member is fixed on the cover plate; a current collector, the current collector is arranged on the side of the cover plate having the insulating sheet, the current collector is connected to the pole column, and the current collector and the cover plate are fixedly connected by abutting through the insulating member; a conductive terminal, the conductive terminal is arranged on the other side of the cover plate, the conductive terminal is connected to the pole column, and the conductive terminal and the cover plate are fixedly connected by abutting through the insulating member.

[0008] In an embodiment of the present utility model, the insulating member includes: a first insulating portion, the first insulating portion abuts against the one side of the cover plate and is provided with a first receiving groove, an opening of the first receiving groove is arranged away from the cover plate, and the current collector is arranged in the first receiving groove; a second insulating portion, the second insulating portion abuts against the other side of the cover plate and is provided with a second receiving groove, an opening of the second receiving groove is arranged away from the cover plate, and the conductive terminal is arranged in the second receiving groove.

[0009] In some examples of the present utility model, the conductive terminal has a connecting protrusion, the connecting protrusion extends circumferentially along the conductive terminal to form a ring shape, a mating groove is arranged in the second receiving groove, and the connecting protrusion is arranged in the mating groove.

[0010] In some examples of the present utility model, a plurality of through holes are arranged on the cover plate, the insulating member further includes a connecting portion, the connecting portion is arranged in the plurality of through holes, and the connecting portion is connected to the first insulating portion and the second insulating portion.

[0011] In an example of the present utility model, the number of the through holes is greater than or equal to 6 and less than or equal to 12; and / or, the aperture of the through holes is greater than or equal to 2 mm and less than or equal to 5 mm.

[0012] In an embodiment of the present utility model, the insulating member is provided with an avoidance hole, the avoidance hole and the through hole are arranged in alignment in the thickness direction of the cover plate, and the pole column passes through the avoidance hole and the through hole to be connected to the current collector and the conductive terminal.

[0013] In an embodiment of the present utility model, the insulating member, the cover plate and the conductive terminal are integrally injection-molded parts.

[0014] In an embodiment of the present utility model, the cover plate assembly further includes a sealing member, the sealing member is sleeved on the pole column and includes: a first sealing portion, the first sealing portion is arranged between the inner wall of the through hole and the pole column; a second sealing portion, the second sealing portion is connected to the first sealing portion and is located on the side of the cover plate with the insulating sheet, and the second sealing portion abuts between the cover plate and the current collector.

[0015] The battery cell according to the second aspect of the present utility model includes the cover plate assembly according to the first aspect of the present utility model.

[0016] According to the battery cell of the present utility model, by providing the cover plate assembly of the above first aspect, the cover plate assembly is provided with a cover plate and an insulating sheet. The insulating sheet covers one surface of the cover plate in the thickness direction and is connected to the cover plate. The structure is simple and the arrangement is convenient, which can greatly reduce the space occupied by the cover plate assembly in the battery cell, thereby well improving the space utilization rate of the battery cell and well enhancing the energy density of the battery cell.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of the cover plate assembly according to an embodiment of the present utility model;

[0019] Figure 2 is an exploded view of the cover plate assembly from another angle according to an embodiment of the present utility model;

[0020] Figure 3 is a schematic view of the cover plate assembly according to an embodiment of the present utility model;

[0021] Figure 4 is Figure 3 a cross-sectional view taken along line A-A shown in

[0022] Figure 5 is Figure 3 a cross-sectional view taken along line B-B shown in

[0023] Figure 6 is a schematic view of the insulating member according to an embodiment of the present utility model;

[0024] Figure 7 is a schematic view of the insulating member from another angle according to an embodiment of the present utility model;

[0025] Figure 8 is a schematic view of the insulating member from yet another angle according to an embodiment of the present utility model;

[0026] Figure 9 is a schematic view of the insulating member from still another angle according to an embodiment of the present utility model;

[0027] Figure 10 is Figure 9 a cross-sectional view taken along line C-C shown in

[0028] Figure 11 is a schematic view of the cover plate according to an embodiment of the present utility model;

[0029] Figure 12 is a schematic view of the cover plate from another angle according to an embodiment of the present utility model;

[0030] Figure 13 It is a schematic diagram of another angle of the cover plate according to an embodiment of the present utility model.

[0031] Reference numerals:

[0032] 10. Cover plate; 11. Through hole; 12. Perforation;

[0033] 20. Insulating sheet;

[0034] 30. Insulating member; 301. Avoidance hole;

[0035] 31. First insulating portion; 311. First receiving groove; 32. Second insulating portion; 321. Second receiving groove; 3211. Fitting groove; 33. Connecting portion;

[0036] 40. Conductive terminal; 401. Fitting hole; 41. Connecting protrusion;

[0037] 50. Current collector; 60. Terminal post; 70. Sealing member;

[0038] 100. Cover plate assembly. Detailed implementation manners

[0039] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0040] First, refer to Figures 1 - 13 A brief description will be given to a battery cell according to an embodiment of the second aspect of the present utility model. The battery cell may include a housing and a cover plate assembly 100. The cover plate assembly 100 seals the opening of the housing and cooperates with the housing to provide sealing protection for the battery cell assembly in the battery cell. The cover plate assembly 100 can be used for connecting the battery cell to an external circuit.

[0041] Next, refer to Figures 1 - 13 Describe the cover plate assembly 100 according to an embodiment of the first aspect of the present utility model.

[0042] As Figures 1 - 13 shown, the cover plate assembly 100 according to an embodiment of the first aspect of the present utility model includes: a cover plate 10, a terminal post 60, and an insulating sheet 20.

[0043] Specifically, the terminal post 60 is fixed on the cover plate 10; the insulating sheet 20 covers one surface of the cover plate 10 in the thickness direction (such as the up and down direction shown in Figure 1 ) and is connected to the cover plate 10.

[0044] In this embodiment, the cover plate assembly 100 includes a cover plate 10 and a terminal post 60. The terminal post 60 is fixed on the cover plate 10. The structure is simple and can meet the assembly and use requirements of the battery cell. Specifically, the terminal post 60 can be a positive terminal post or a negative terminal post. In the cover plate assembly 100, only one terminal post 60 can be provided, or the cover plate assembly 100 can also include two terminal posts 60. For example, when the cover plate assembly 100 includes one terminal post 60, two cover plate assemblies 100 with the same structure can be provided in the battery cell, and a positive terminal post and a negative terminal post are respectively provided in the two cover plate assemblies 100. When the cover plate assembly 100 includes two terminal posts 60, the two terminal posts 60 can be a positive terminal post and a negative terminal post. In this embodiment, the number of terminal posts 60 in the cover plate assembly 100 and the positive and negative polarities of the terminal posts 60 are not limited.

[0045] In this embodiment, an insulating sheet 20 is covered on one side in the thickness direction of the cover plate 10. Specifically, in the battery cell, the side of the cover plate 10 covered with the insulating sheet 20 can face the cavity of the battery cell that houses the battery core assembly. The insulating sheet 20 can play an insulating and separating role between the cover plate 10 and the tab of the battery core assembly, etc., to avoid the situation where the tab overlaps with the cover plate 10, so that the battery cell has good safety and reliability during use.

[0046] It can be understood that in the related art, usually a lower plastic is provided on the side of the cover plate 10 facing the cavity for insulating separation. The lower plastic has a large volume and occupies a large space in the cavity, thus reducing the space for arranging the battery core assembly in the battery cell, and further reducing the energy density of the battery cell. Moreover, when the cover plate 10 is assembled with the housing, the lower plastic is prone to deformation, resulting in a deviation in the fit between the lower plastic and the cover plate 10. Furthermore, there is a risk that the tab of the battery core is caught in the gap between the lower plastic and the cover plate 10 and contacts the cover plate 10, reducing the insulation reliability of the lower plastic.

[0047] In this embodiment, the insulating sheet 20 is covered on the cover plate 10 for insulating separation. The insulating sheet 20 replaces the original lower plastic structure and can well meet the insulation requirements of the battery cell. The insulating sheet 20 has a simple structure and a small volume, which can greatly reduce the space occupied by the cover plate assembly 100 in the battery cell, enabling the battery core assembly to have more arrangement space, thereby greatly improving the space utilization rate of the battery cell and the energy density of the battery cell. In this embodiment, the insulating sheet 20 is connected to the cover plate 10 and covers one side surface of the cover plate 10. The structure is simple and not prone to deformation, which can well avoid the risk of the tab contacting the cover plate 10, making the insulating sheet 20 have good insulation reliability.

[0048] In this embodiment, the insulating sheet 20 can be manufactured using an insulating material resistant to electrolytes. For example, the insulating sheet 20 can be a polypropylene part, a polycarbonate part, a polyethylene terephthalate part, and so on.

[0049] In this embodiment, the insulating sheet 20 covers one surface of the cover plate 10 in the thickness direction. The insulating sheet 20 can be arranged according to insulation requirements and assembly requirements. For example, the insulating sheet 20 can be provided with openings to cooperate with the point connection between the pole post 60 and the battery cell assembly. Multiple insulating sheets 20 can also be arranged on the cover plate 10, and the multiple insulating sheets 20 cooperate to cover one surface of the cover plate 10 to meet insulation requirements and assembly requirements. No specific limitation is made in this embodiment.

[0050] According to the cover plate assembly 100 of the embodiment of the present utility model, by providing the cover plate 10 and the insulating sheet 20, the insulating sheet 20 covers one surface of the cover plate 10 in the thickness direction and is connected to the cover plate 10. The structure is simple and the arrangement is convenient, which can greatly reduce the space occupied by the cover plate assembly 100 in the battery cell, thereby well improving the space utilization rate of the battery cell and well enhancing the energy density of the battery cell.

[0051] In some embodiments of the present utility model, the insulating sheet 20 and the cover plate 10 can be adhesively connected. In this embodiment, the insulating sheet 20 and the cover plate 10 are adhesively connected, with a simple structure, convenient and reliable fixation, making the assembly of the cover plate assembly 100 more convenient.

[0052] In some embodiments of the present utility model, as Figure 1 and Figure 12 shown, the cover plate 10 can be provided with a through hole 11. The through hole 11 penetrates the cover plate 10 along the thickness direction of the cover plate 10, and the pole post 60 is inserted into the through hole 11. The cover plate assembly 100 can further include: an insulating member 30, a current collector 50, and a conductive terminal 40. Specifically, the insulating member 30 is fixed on the cover plate 10; the current collector 50 is arranged on the side of the cover plate 10 with the insulating sheet 20, the current collector 50 is connected to the pole post 60, and the current collector 50 and the cover plate 10 are fixedly abutted through the insulating member 30; the conductive terminal 40 is arranged on the other side of the cover plate 10, the conductive terminal 40 is connected to the pole post 60, and the conductive terminal 40 and the cover plate 10 are fixedly abutted through the insulating member 30.

[0053] In this embodiment, by providing the through hole 11 on the cover plate 10, it is convenient for the assembly of the pole post 60 and the cover plate 10. Specifically, the pole post 60 is inserted into the through hole 11, the current collector 50 is arranged on the side of the cover plate 10 with the insulating sheet 20, one end of the current collector 50 is connected to the pole post 60, the conductive terminal 40 is arranged on the other side of the cover plate 10, and the other end of the conductive terminal 40 is connected to the pole post 60.

[0054] In this embodiment, a current collector 50 and a conductive terminal 40 are provided. When the pole column 60 is connected to the tab, the current collector 50 provides a relatively large connection mating surface, making the connection between the pole column 60 and the tab more convenient and reliable. The conductive terminal 40 can provide a larger connection mating surface when the pole column 60 is connected to an external circuit, thereby making the connection between the pole column 60 and the external circuit more convenient and reliable, and making it more convenient for the battery cell during assembly and use.

[0055] In this embodiment, the insulating member 30 is disposed between the current collector 50 and the cover plate 10 and between the conductive terminal 40 and the cover plate 10, which can play a stable and reliable insulating role between the current collector 50 and the cover plate 10 and between the conductive terminal 40 and the cover plate 10, preventing the cover plate 10 from contacting the current collector 50 and the conductive terminal 40, thus well avoiding the short - circuit risk, keeping the battery cell in good safety and reliability, and enabling the battery cell to operate stably and reliably during use.

[0056] The insulating member 30 can cooperate with the insulating sheet 20 to provide better insulating protection for the cover plate 10, so that the cover plate assembly 100 can better meet the usage requirements of the battery cell. The insulating member 30 is fixed on the cover plate 10, with a simple structure and convenient and reasonable layout.

[0057] In an embodiment of the present utility model, the current collector 50 can be a current - collecting plate, and the current collector 50 and the pole column 60 are an integral part. In this embodiment, setting the current collector 50 as a current - collecting plate has a simple structure and can well meet the usage and assembly requirements. Setting the current collector 50 and the pole column 60 as an integral part can make the overall structural strength of the current collector 50 and the pole column 60 better and more stable and reliable, enabling the current collector 50 and the pole column 60 to stably conduct circuit connection, and avoiding the positioning assembly and disassembly when the current collector 50 and the pole column 60 are separately arranged. Thus, the number of components and assembly processes in the cover plate assembly 100 can be reduced, making the assembly of the cover plate assembly 100 more convenient and easy, and to a certain extent facilitating the automated production of the cover plate assembly 100.

[0058] In an embodiment of the present utility model, as Figure 2 shown, the insulating member 30 may include: a first insulating portion 31 and a second insulating portion 32. The first insulating portion 31 abuts against one side of the cover plate 10 and is provided with a first receiving groove 311, and the opening of the first receiving groove 311 is arranged away from the cover plate 10, and the current collector 50 is disposed in the first receiving groove 311; the second insulating portion 32 abuts against the other side of the cover plate 10 and is provided with a second receiving groove 321, and the opening of the second receiving groove 321 is arranged away from the cover plate 10, and the conductive terminal 40 is disposed in the second receiving groove 321.

[0059] In this embodiment, the insulating member 30 includes a first insulating portion 31. The first insulating portion 31 is provided with a first receiving groove 311. The current collector member 50 is disposed in the first receiving groove 311. The structure is simple. The first insulating portion 31 can provide circumferential insulation protection for the current collector member 50, so that the insulating member 30 can more stably and reliably insulate and separate the current collector member 50 and the cover plate 10, thereby making the cover plate assembly 100 operate more stably and reliably in the battery cell.

[0060] In this embodiment, the insulating member 30 is further provided with a second insulating portion 32. The second insulating portion 32 is provided with a second receiving groove 321. The conductive terminal 40 is disposed in the second receiving groove 321. The structure is simple. The second insulating portion 32 can provide circumferential insulation protection for the conductive terminal 40, so that the insulating member 30 can more stably and reliably insulate and separate the conductive terminal 40 and the cover plate 10, thereby further improving the operating stability and reliability of the cover plate assembly 100 in the battery cell, and enabling the battery cell to have better safety performance and reliability when in use.

[0061] In some examples of the present utility model, such as Figure 2 and Figure 4 shown, the number of the insulating sheets 20 can be two. The two insulating sheets 20 can be arranged on both sides of the first insulating portion 31 in the length direction of the cover plate 10 (such as Figure 2 the left - right direction shown). This can make it more convenient and easy to assemble the insulating sheets 20 and the insulating member 30 on the cover plate 10, and enable the insulating sheets 20 and the insulating member 30 to better cooperate on one side surface of the cover plate 10 to provide stable and reliable insulation protection for the cover plate 10. At the same time, arranging two insulating sheets 20 to cover one side surface of the cover plate 10 can make it more convenient and easy to assemble the cover plate assembly 100. Optionally, a certain installation gap can be left between the insulating sheets 20 and the insulating member 30 to make it more convenient to bond and fix the insulating sheets 20 to the cover plate 10.

[0062] In some examples of the present utility model, referring to Figure 1 、 Figure 5 and Figure 8 shown, the conductive terminal 40 can have a connecting protrusion 41. The connecting protrusion 41 extends circumferentially along the conductive terminal 40 to form a ring. A mating groove 3211 is provided in the second receiving groove 321, and the connecting protrusion 41 is disposed in the mating groove 3211.

[0063] In this embodiment, connection protrusions 41 are provided in the circumferential direction of the conductive terminal 40. The connection protrusions 41 cooperate with the mating grooves 3211 in the second receiving groove 321, so that the conductive terminal 40 can be fixed more stably and reliably in the second receiving groove 321. Thus, when the conductive terminal 40 is connected and fixed to the pole post 60, it is more convenient. The cooperation between the connection protrusions 41 and the mating grooves 3211 can play a certain positioning role in the position of the conductive terminal 40 on the cover plate 10, so that the conductive terminal 40 and the pole post 60 can be connected and fixed more stably and reliably, making the assembly of the cover plate assembly 100 more convenient.

[0064] In some examples of the present utility model, such as Figure 1 and Figure 4 shown, the conductive terminal 40 may be provided with a mating hole 401. The pole post 60 extends into the mating hole 401, and the pole post 60 is welded to the conductive terminal 40.

[0065] In this embodiment, the pole post 60 is welded to the conductive terminal 40, so that the connection between the pole post 60 and the conductive terminal 40 is stable and reliable. A mating hole 401 is provided in the conductive terminal 40, and the pole post 60 extends into the mating hole 401 to cooperate with the conductive terminal 40. The structure is simple. The mating hole 401 can play a good positioning and limiting role for the pole post 60 and the conductive terminal 40, making it more convenient for the welding operation of the pole post 60 and the conductive terminal 40. It can be understood that the conductive terminal 40 has a certain thickness. In this embodiment, by providing the mating hole 401 in the conductive terminal 40, the pole post 60 can be exposed from the surface of the conductive terminal 40 facing away from the cover plate 10, so that the welding of the pole post 60 and the conductive terminal 40 is more convenient. Preferably, the end face of the pole post 60 extending into the mating hole 401 may be flush with the surface of the conductive terminal 40 facing away from the cover plate 10. This can facilitate the connection and assembly of the conductive terminal 40 with the external circuit and make the connection and fixation of the pole post 60 and the conductive terminal 40 stable and reliable.

[0066] In some examples of the present utility model, such as Figure 1 and Figure 11 shown, the cover plate 10 may be provided with a plurality of through holes 12. The insulating member 30 further includes a connecting portion 33. The connecting portion 33 is disposed in the plurality of through holes 12, and the connecting portion 33 is connected to the first insulating portion 31 and the second insulating portion 32.

[0067] In this embodiment, the insulating member 30 is provided with a connecting portion 33. The connecting portion 33 is arranged in a plurality of through holes 12 and is connected to the first insulating portion 31 and the second insulating portion 32. The structure is simple, enabling the insulating member 30 to be stably and reliably fixed on the cover plate 10. By arranging the connecting portion 33 in a plurality of through holes 12, the first insulating portion 31 and the second insulating portion 32 can be connected together through the connecting portions 33 at multiple positions, thereby making the connection between the first insulating portion 31 and the second insulating portion 32 more stable and reliable, and making the overall structural stability of the insulating member 30 better.

[0068] In an example of the present utility model, the number of the through holes 12 may be greater than or equal to 6 and less than or equal to 12.

[0069] In this embodiment, the number of the through holes 12 is set to be greater than or equal to 6 and less than or equal to 12, enabling the insulating member 30 to form a sufficient number of connecting portions 33, so that the insulating member 30 can maintain a stable and reliable structural state, and avoiding excessive number of through holes 12 from having a greater impact on the structural strength of the cover plate 10, enabling the cover plate 10 to maintain sufficient structural strength, thereby enabling the insulating member 30 to be stably and reliably fixed on the cover plate 10, and making the overall structure of the cover plate assembly 100 more stable and reliable. For example, the number of the through holes 12 may be 6, 7, 8, 9, 10, 11 or 12, and the number of the through holes 12 can be reasonably set according to needs.

[0070] In an example of the present utility model, the aperture of the through hole 12 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0071] In this embodiment, the aperture of the through hole 12 is set to be greater than or equal to 2 mm and less than or equal to 5 mm, which can enable the connecting portion 33 formed in the through hole 12 to have good structural strength, so that the connecting portion 33 can stably and reliably connect the first insulating portion 31 and the second insulating portion 32, enabling the insulating member 30 to maintain a stable and reliable structural state, and avoiding excessive aperture of the through hole 12 from severely reducing the structural strength of the cover plate 10, thereby enabling the cover plate 10 to stably and reliably support and fix components such as the insulating member 30 and the pole column 60, and making the overall structure of the cover plate assembly 100 more stable and reliable. For example, the aperture of the through hole 12 may be 2 mm, 2.1 mm, 2.4 mm, 2.9 mm, 3 mm, 3.2 mm, 3.5 mm, 4 mm, 5 mm, etc., and the aperture of the through hole 12 can be reasonably set according to needs.

[0072] In an example of the present utility model, the number of the through holes 12 may be greater than or equal to 6 and less than or equal to 12; the aperture of the through hole 12 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0073] In this embodiment, the number of the perforations 12 is set to be greater than or equal to 6 and less than or equal to 12, and the aperture of the perforations 12 is set to be greater than or equal to 2 mm and less than or equal to 5 mm, so that the connecting portion 33 can have good structural strength and the cover plate 10 can maintain a stable structural state, thereby enabling the insulating member 30 to be stably and reliably fixed on the cover plate 10, and further enabling the insulating member 30 to stably play an insulating and protective role, making the overall structure of the cover plate assembly 100 more stable and reliable.

[0074] In an embodiment of the present utility model, as Figure 1 and Figure 8 shown, the insulating member 30 may be provided with an avoidance hole 301, and the avoidance hole 301 and the through hole 11 are arranged in alignment in the thickness direction of the cover plate 10. The pole post 60 passes through the avoidance hole 301 and the through hole 11 and is connected to the current collector 50 and the conductive terminal 40.

[0075] In this embodiment, the avoidance hole 301 is provided on the insulating member 30. Specifically, the avoidance hole 301 may be formed on both the first insulating portion 31 and the second insulating portion 32. When the cover plate assembly 100 is assembled, the pole post 60 may sequentially pass through the avoidance hole 301 of the first insulating portion 31, the through hole 11, and the avoidance hole 301 of the second insulating portion 32 in the thickness direction of the cover plate 10, and then the pole post 60 extends into the mating hole 401 of the conductive terminal 40 and is welded to the conductive terminal 40.

[0076] In this embodiment, the avoidance hole 301 provided on the insulating member 30 cooperates with the through hole 11, and the structure is simple, which is convenient for the assembly of the pole post 60 with the cover plate 10, the conductive terminal 40, and the insulating member 30.

[0077] In an embodiment of the present utility model, the insulating member 30, the cover plate 10, and the conductive terminal 40 may be integrally injection-molded parts.

[0078] In this embodiment, the insulating member 30, the cover plate 10, and the conductive terminal 40 are set as integrally injection-molded parts. Specifically, when the cover plate assembly 100 is manufactured, the insulating member 30, the cover plate 10, and the conductive terminal 40 can be integrally formed by injection molding. The processing is convenient and the production cost is low, thereby reducing the production cost of the battery cell. The integrally formed manner can avoid the assembly process when the conductive terminal 40, the cover plate 10, and the insulating member 30 are separately processed and the positioning times during assembly, and greatly reduce the number of components in the cover plate assembly 100, thereby making the assembly of the cover plate assembly 100 more convenient and efficient. The overall structure of the insulating member 30, the cover plate 10, and the conductive terminal 40 can be more compact, thereby reducing the space occupied by the cover plate assembly 100 in the battery cell to a certain extent, and further improving the space utilization rate of the battery cell.

[0079] In an embodiment of the present utility model, referring to Figure 1 andFigure 4 As shown, the cover plate assembly 100 may further include a seal 70. The seal 70 is sleeved on the pole post 60 and includes: a first seal portion and a second seal portion. The first seal portion is disposed between the inner wall of the through hole 11 and the pole post 60; the second seal portion is connected to the first seal portion and is located on the side of the cover plate 10 having the insulating sheet 20, and the second seal portion abuts between the cover plate 10 and the current collector 50.

[0080] In this embodiment, the seal 70 is provided. The first seal portion of the seal 70 is sealingly connected between the inner wall of the through hole 11 and the outer peripheral wall of the pole post 60, and the second seal portion of the seal 70 is sealingly connected between the current collector 50 and the cover plate 10, so as to play a stable and reliable insulating role for the pole post 60 and the cover plate 10 and the current collector 50 and the cover plate 10, and play a stable sealing role for the position of the through hole 11 in the thickness direction of the cover plate 10 of the cover plate assembly 100, making the safety and reliability of the cover plate assembly 100 better. The second seal portion may extend circumferentially along the pole post 60 to form a ring and extend radially outward along the pole post 60, and the first seal portion may extend in the thickness direction of the cover plate 10 to form a tube.

[0081] Next, refer to Figures 1 - 13 to describe a battery cell according to a second aspect embodiment of the present invention.

[0082] As Figures 1 - 13 shown, a battery cell according to an embodiment of the present invention includes a cover plate assembly 100 according to a first aspect embodiment of the present invention.

[0083] Other components and operations of the battery cell according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0084] For the battery cell according to the embodiment of the present invention, by providing the cover plate assembly 100 of the above first aspect embodiment, the cover plate assembly 100 is provided with a cover plate 10 and an insulating sheet 20. The insulating sheet 20 covers one surface of the cover plate 10 in the thickness direction and is connected to the cover plate 10. The structure is simple and the arrangement is convenient, which can greatly reduce the space occupied by the cover plate assembly 100 in the battery cell, thereby well improving the space utilization rate of the battery cell and well improving the energy density of the battery cell.

[0085] Next, reference will be made to Figures 1 - 13 to describe a battery cell according to a specific embodiment of the present invention.

[0086] As Figures 1 - 13 shown, the battery cell includes a cover plate assembly 100. The cover plate assembly 100 includes a cover plate 10, a pole post 60, a conductive terminal 40, a current collector 50, an insulating member 30, an insulating sheet 20, and a seal 70.

[0087] The cover plate 10 is a light aluminum plate. Through holes 11 and perforations 12 are provided on the cover plate 10. The perforations 12 are arranged on both sides of the through hole 11 in the length direction of the cover plate 10. Specifically, the number of perforations 12 is six and they are evenly divided into two groups and arranged on both sides of the through hole 11. The arrangement of the perforations 12 can be set as needed and is not specifically limited in this embodiment.

[0088] The insulating member 30 is a plastic part. The insulating member 30, the cover plate 10 and the conductive terminal 40 are integrally injection-molded. The insulating member 30 includes a first insulating portion 31, a second insulating portion 32 and a connecting portion 33. The first insulating portion 31 and the second insulating portion 32 are respectively abutted against the two side surfaces of the cover plate 10 in the thickness direction. The first insulating portion 31 is formed with a first receiving groove 311. The current collector 50 is arranged in the first receiving groove 311. The second insulating portion 32 has a second receiving groove 321. The conductive terminal 40 is arranged in the second receiving groove 321. Avoidance holes 301 are formed at the bottom of both the first receiving groove 311 and the second receiving groove 321. The avoidance holes 301 communicate with the through hole 11. The connecting portion 33 is formed in the six perforations 12 and is connected to the first insulating portion 31 and the second insulating portion 32.

[0089] The current collector 50 is a current collector plate. The current collector 50 and the pole post 60 are an integral part. The pole post 60 passes through the through hole 11 and the avoidance hole 301 from one side of the cover plate 10 to the other side. The conductive terminal 40 has a mating hole 401. The pole post 60 extends into the mating hole 401 and is welded and fixed to the conductive terminal 40. The insulating sheet 20 is arranged along the length direction of the cover plate 10 on both sides of the first insulating portion 31. The insulating sheet 20 is adhesively connected to the surface of the cover plate 10.

[0090] The sealing member 70 is a sealing ring. The sealing member 70 is sealingly connected between the pole post 60 and the inner wall of the through hole 11 and between the cover plate 10 and the current collector 50. The sealing member 70 includes a first sealing portion and a second sealing portion. The first sealing portion is tubular and is sealingly connected between the outer peripheral surface of the pole post 60 and the inner wall of the through hole 11. The second sealing portion is annular. The first sealing portion is connected to the second sealing portion. The second sealing portion is arranged in the avoidance hole 301 of the first insulating portion 31 to seal the current collector 50 at the position of the through hole 11 and insulate the current collector 50 from the cover plate 10.

[0091] In this embodiment, the cover plate assembly 100 is provided with the cover plate 10 and the insulating sheet 20. The insulating sheet 20 covers one side surface of the cover plate 10 in the thickness direction and is fixedly connected to the cover plate 10. The structure is simple and the arrangement is convenient. It can greatly reduce the space occupied by the cover plate assembly 100 in the battery cell, thereby well improving the space utilization rate of the battery cell and well improving the energy density of the battery cell.

[0092] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0093] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0094] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0095] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0096] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, characterized in that: include: A cover plate (10) and a pole (60), wherein the pole (60) is fixed on the cover plate (10); An insulating sheet (20), the insulating sheet (20) covers a surface of one side of the cover plate (10) in the thickness direction and is connected to the cover plate (10).

2. The cover plate assembly according to claim 1, characterized in that: The cover plate (10) is provided with a through hole (11), the through hole (11) penetrates the cover plate (10) along the thickness direction of the cover plate (10), the pole (60) is passed through the through hole (11), and the cover plate assembly further comprises: an insulating member (30), wherein the insulating member (30) is fixed on the cover plate (10); A current collecting member (50), the current collecting member (50) being arranged on a side of the cover plate (10) having the insulating sheet (20), the current collecting member (50) being connected to the pole (60), and the current collecting member (50) and the cover plate (10) being abutted and fixed via the insulating member (30); A conductive terminal (40), the conductive terminal (40) being arranged on the other side of the cover plate (10), the conductive terminal (40) being connected to the pole (60), and the conductive terminal (40) and the cover plate (10) being abutted and fixed via the insulating member (30).

3. The cover plate assembly according to claim 2, characterized in that: The insulating member (30) comprises: a first insulating portion (31), the first insulating portion (31) abutting against the one side of the cover plate (10) and provided with a first receiving groove (311), the opening of the first receiving groove (311) being arranged away from the cover plate (10), and the current collecting member (50) being arranged in the first receiving groove (311); A second insulating portion (32), the second insulating portion (32) abuts against the other side of the cover plate (10) and is provided with a second receiving groove (321), the opening of the second receiving groove (321) is arranged away from the cover plate (10), and the conductive terminal (40) is arranged in the second receiving groove (321).

4. The cover plate assembly according to claim 3, characterized in that: The conductive terminal (40) has a connecting protrusion (41), and the connecting protrusion (41) extends in a ring shape along the circumference of the conductive terminal (40). A matching groove (3211) is provided in the second accommodating groove (3211), and the connecting protrusion (41) is arranged in the matching groove (3211).

5. The cover plate assembly according to claim 3, characterized in that: The cover plate (10) is provided with a plurality of through holes (12), and the insulating member (30) further comprises a connecting portion (33), wherein the connecting portion (33) is arranged in the plurality of through holes (12), and the connecting portion (33) is connected to the first insulating portion (31) and the second insulating portion (32).

6. The cover plate assembly according to claim 5, characterized in that: The number of the perforations (12) is greater than or equal to 6 and less than or equal to 12; and / or the diameter of the perforations (12) is greater than or equal to 2 mm and less than or equal to 5 mm.

7. The cover plate assembly according to claim 2, characterized in that: The insulating member (30) is provided with an avoidance hole (301), the avoidance hole (301) and the through hole (11) are aligned in the thickness direction of the cover plate (10), and the pole (60) passes through the avoidance hole (301) and the through hole (11) to be connected to the current collecting member (50) and the conductive terminal (40).

8. The cover plate assembly according to any one of claims 2 to 7, characterized in that: The insulating member (30), the cover plate (10) and the conductive terminal (40) are an integral injection-molded part.

9. The cover plate assembly according to any one of claims 2 to 7, characterized in that: It also includes a sealing member (70), which is sleeved on the pole (60) and includes: A first sealing portion, the first sealing portion being arranged between the inner wall of the via hole (11) and the pole (60); A second sealing portion, the second sealing portion is connected to the first sealing portion and is located on a side of the cover plate (10) having the insulating sheet (20), the second sealing portion abutting between the cover plate (10) and the current collecting member (50).

10. A battery cell, characterized in that: Comprising a cover plate assembly according to any one of claims 1-9.

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