Cover plate assembly and battery

Abstract

The utility model discloses a cover plate assembly and a battery, the cover plate assembly is used for the battery, the battery is provided with a pole group, the cover plate assembly comprises: a cover plate body, the cover plate body is provided with a mounting hole; the connecting block is arranged in the mounting hole in a penetrating manner, and a mounting groove is formed in one side, facing the pole group, of the connecting block; and the connecting piece assembly is connected with the pole lugs of the pole group and is connected with the bottom wall of the mounting groove. According to the cover plate assembly disclosed by the utility model, the connecting sheet assembly can be connected with the pole group and can also be connected with the connecting block, so that the step of connecting middleware such as a pole column is reduced, the assembly steps are simplified, and the production efficiency is improved. And meanwhile, the connecting block is dual-purpose, so that the arrangement of corresponding parts is reduced, the cover plate assembly is simple in structure, and the production cost is reduced.

Description

Technical Field

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

[0002] Currently, in square batteries, the tabs of the terminal posts mostly rely on connecting pieces for connection. The connecting piece needs to be connected to the terminal post, then riveted to the riveting block through the terminal post, and finally connected to the connecting block. The connecting block is connected to the electrical equipment to achieve the output of electrical energy. However, this assembly method has many components and complex processes, resulting in high costs and low production efficiency. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a cover plate assembly, which not only reduces the assembly steps, improves the production efficiency, but also reduces the components, making the cover plate assembly simple in structure and reducing the production cost.

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

[0005] The cover plate assembly according to the embodiment of the utility model is used for a battery, and the battery has a pole group. The cover plate assembly includes: a cover plate body with a mounting hole thereon; a connecting block passing through the mounting hole, and having a mounting groove on a side facing the pole group; and a connecting piece assembly connected to the tab of the pole group and to the bottom wall of the mounting groove.

[0006] For the cover plate assembly according to the embodiment of the utility model, by passing the connecting block through the mounting hole, with a mounting groove on the side of the connecting block facing the pole group; the connecting piece assembly is connected to the tab of the pole group and to the bottom wall of the mounting groove, so that the connecting piece assembly can not only realize the connection with the pole group, but also realize the connection with the connecting block, reducing the steps of connecting intermediate parts such as the terminal post, thus simplifying the assembly steps and improving the production efficiency. At the same time, the connecting block is also made to serve two purposes, thereby reducing the setting of corresponding components, making the cover plate assembly simple in structure and reducing the production cost.

[0007] In some embodiments of the utility model, the connecting piece assembly includes: a connecting plate disposed between the connecting block and the pole group and connected to the tab of the pole group; a connecting column disposed on the connecting plate and connected to the connecting plate, the connecting column being adapted to be disposed in the mounting groove and connected to the bottom wall of the mounting groove.

[0008] In some embodiments of the utility model, the connecting column and the connecting plate are integrally formed, and the connecting column is formed by a part of the connecting plate protruding away from the pole group.

[0009] In some embodiments of the present utility model, the connecting column is welded to the bottom wall of the mounting groove. One side of the connecting block facing away from the electrode group has a counterbore, and the counterbore is arranged opposite to and spaced apart from the mounting groove. The connecting block between the counterbore and the mounting groove forms a first welding rib.

[0010] In some embodiments of the present utility model, one side of the connecting column facing the electrode group has a stamping groove. The connecting column between the bottom wall of the stamping groove and one end of the connecting column facing away from the electrode group forms a second welding rib. The first welding rib is adapted to be welded to the second welding rib, and the thickness of the second welding rib is greater than that of the first welding rib.

[0011] In some embodiments of the present utility model, the connecting plate includes: a first plate, the connecting column is arranged on the first plate and is connected to the first plate; a second plate, the second plate is arranged on a side of the first plate facing away from the electrode group and is connected to the first plate, and the second plate is connected to the electrode tab of the electrode group.

[0012] In some embodiments of the present utility model, one side of the electrode group facing the cover body has a positive electrode tab group and a negative electrode tab group. The positive electrode tab group and the negative electrode tab group are spaced apart along the length direction of the cover body. The connecting piece assembly is spaced apart into two along the length direction of the cover body and is respectively connected to the positive electrode tab group and the negative electrode tab group.

[0013] In some embodiments of the present utility model, the positive electrode tab group includes a plurality of positive electrode tabs spaced apart along the width direction of the cover body, the negative electrode tab group includes a plurality of negative electrode tabs spaced apart along the width direction of the cover body. Each positive electrode tab and each negative electrode tab each include two electrode tabs stacked and connected along the thickness direction of the connecting plate, and a through groove is formed by partial spacing between the two electrode tabs. The second plate includes: a body portion, one end in the length direction of the body portion is connected to the first plate; a plurality of connecting portions, the plurality of connecting portions are spaced apart along the width direction of the cover body, the connecting portions are arranged at one end of the body portion facing away from the first plate and are connected to the body portion, and the connecting portions pass through the through groove and are adapted to be connected to the inner wall of the through groove.

[0014] In some embodiments of the present utility model, along the direction from the connecting block to the electrode group, the inner peripheral wall of one end of the mounting groove facing the electrode group extends obliquely in a direction away from the axis of the mounting groove, and the outer peripheral wall of one end of the connecting column facing away from the electrode group extends obliquely in a direction away from the axis of the connecting column.

[0015] The battery according to the embodiment of the present utility model includes the above-mentioned cover assembly.

[0016] According to the battery of the embodiment of the present utility model, by providing the above-mentioned cover plate assembly, the connecting block is passed through the mounting hole, and one side of the connecting block facing the electrode group has a mounting groove; the connecting piece assembly is connected to the tab of the electrode group and connected to the bottom wall of the mounting groove, so that the connecting piece assembly can not only realize the connection with the electrode group, but also realize the connection with the connecting block, reducing the steps of connecting intermediate parts such as the electrode post, thus simplifying the assembly steps and improving the production efficiency. At the same time, the connecting block is also made to serve two purposes, thereby reducing the setting of corresponding components, making the cover plate assembly simple in structure and reducing the production cost.

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

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a perspective view of the battery according to the embodiment of the present utility model;

[0020] Figure 2 is a perspective view of the connection between the connecting piece assembly of the cover plate assembly and the tab according to the embodiment of the present utility model;

[0021] Figure 3 is a perspective view of the cover plate assembly according to the embodiment of the present utility model, wherein the connecting piece assembly is not shown;

[0022] Figure 4 is a cross-sectional view of the cover plate assembly according to the embodiment of the present utility model, wherein the connecting piece assembly is not shown;

[0023] Figure 5 is Figure 4 an enlarged view of part A in;

[0024] Figure 6 is a perspective view of the connecting piece assembly of the cover plate assembly according to the embodiment of the present utility model;

[0025] Figure 7 is a cross-sectional view of the connecting piece assembly of the cover plate assembly according to the embodiment of the present utility model;

[0026] Figure 8 is Figure 2 an enlarged view of part B in.

[0027] REFERENCE SIGNS:

[0028] 100, battery;

[0029] 10. Cover plate assembly;

[0030] 1. Cover plate body; 11. Mounting hole;

[0031] 2. Connecting block; 21. Mounting groove; 22. Counterbore; 23. First welding rib;

[0032] 3. Connecting plate assembly; 31. Connecting plate; 311. First plate; 312. Second plate; 313. Body part; 314. Connecting part; 32. Connecting column; 321. Stamping groove; 33. Second welding rib;

[0033] 4. Upper insulating part;

[0034] 5. Lower insulating part;

[0035] 6. Sealing ring;

[0036] 20. Housing;

[0037] 30. Electrode group; 301. Positive tab group; 3011. Positive tab; 302. Negative tab group; 3021. Negative tab; 303. Through slot; 304. Tab. Detailed implementation mode

[0038] The embodiments of the present invention will be described in detail below. The 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 below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0039] In the description of the present invention, 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. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and thus should not be construed as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Reference below Figures 1 - 8 A cover plate assembly 10 according to an embodiment of the present invention is described.

[0042] like Figures 1 - 8 As shown, the cover plate assembly 10 according to the embodiment of the utility model includes: a cover plate body 1, a connecting block 2 and a connecting piece assembly 3.

[0043] Specifically, refer to Figures 1 - 8 The cover plate assembly 10 is used for a battery 100, the battery 100 has a pole group 30, and the cover plate body 1 has a mounting hole 11; the connecting block 2 is inserted into the mounting hole 11, and the side of the connecting block 2 facing the pole group 30 has a mounting groove 21; the connecting piece assembly 3 is connected to the pole ear 304 of the pole group 30 and is connected to the bottom wall of the mounting groove 21.

[0044] It should be noted that the battery 100 also includes a shell 20, one end of which is open to form an open opening, the pole group 30 is arranged in the shell 20, and the cover body 1 is arranged at the open opening to block the open opening. The cover assembly 10 also includes: an upper insulating member 4, a lower insulating member 5 and a sealing ring 6, at least part of the upper insulating member 4 and the lower insulating member 5 are inserted into the mounting hole 11, along the thickness direction of the cover body 1, the lower insulating member 5 is arranged on the side of the upper insulating member 4 away from the pole group 30, and at least part of the lower insulating member 5 and at least part of the upper insulating member 4 are arranged between the connecting block 2 and the cover body 1. In this way, the conduction between the connecting block 2 and the cover body 1 can be avoided, thereby avoiding leakage and improving the safety of the battery 100.

[0045] Furthermore, if Figure 5 As shown, the sealing ring 6 is inserted into the mounting hole 11 and sleeved on the connecting block 2, and the sealing ring 6 is arranged between the connecting block 2 and the upper insulating member 4, the lower insulating member 5 and the cover body 1. Thus, the electrolyte is prevented from flowing out from the gap between the connecting block 2 and the upper insulating member 4, the gap between the connecting block 2 and the lower insulating member 5, and the gap between the cover body 1 and the connecting block 2, thereby improving the sealing of the battery 100 and further improving the safety of the battery 100.

[0046] It can be understood that the connecting block 2 can be riveted to the block, so as to relatively fix the connecting block 2 and the cover plate body 1. At the same time, since the side of the connecting block 2 facing the electrode group 30 has an installation groove 21, the connecting piece assembly 3 is connected to the tab 304 of the electrode group 30 and is connected to the bottom wall of the installation groove 21, thereby realizing the fixation of the connecting piece assembly 3 and the output of electric energy. Thus, the connecting piece assembly 3 can not only realize the connection with the electrode group 30, but also realize the connection with the connecting block 2, reducing the steps of connecting intermediate parts such as electrode posts, thereby simplifying the assembly steps and improving the production efficiency.

[0047] In addition, the connecting block 2 can not only fix the connecting piece assembly 3 and the cover plate body 1, but also lead out the current on the connecting piece assembly 3 from the battery 100 to supply power to the electrical equipment. Thus, the connecting block 2 realizes dual functions with one component, thereby reducing the setting of corresponding components, making the cover plate assembly 10 simple in structure and reducing the production cost.

[0048] According to the cover plate assembly 10 of the embodiment of the present invention, by passing the connecting block 2 through the mounting hole 11, the side of the connecting block 2 facing the electrode group 30 has an installation groove 21; the connecting piece assembly 3 is connected to the tab 304 of the electrode group 30 and is connected to the bottom wall of the installation groove 21, so that the connecting piece assembly 3 can not only realize the connection with the electrode group 30, but also realize the connection with the connecting block 2, reducing the steps of connecting intermediate parts such as electrode posts, thereby simplifying the assembly steps and improving the production efficiency. At the same time, the connecting block 2 also realizes dual functions with one component, thereby reducing the setting of corresponding components, making the cover plate assembly 10 simple in structure and reducing the production cost.

[0049] In some embodiments of the present invention, as Figure 2 and Figures 4 - 7 shown, the connecting piece assembly 3 includes: a connecting plate 31 and a connecting column 32. The connecting plate 31 is arranged between the connecting block 2 and the electrode group 30 and is connected to the tab 304 of the electrode group 30; the connecting column 32 is arranged on the connecting plate 31 and is connected to the connecting plate 31. The connecting column 32 is adapted to be arranged in the installation groove 21 and is connected to the bottom wall of the installation groove 21.

[0050] It can be understood that the connecting plate 31 can lead out the current in the electrode group 30, and at the same time can play a role in supporting and fixing the connecting column 32. The connecting column 32 is connected to the bottom wall of the installation groove 21, so as to lead the current to the connecting block 2, thereby realizing the output of electric energy.

[0051] In some embodiments of the present utility model, the connecting column 32 and the connecting plate 31 are integrally formed. The connecting column 32 is formed by a part of the connecting plate 31 protruding away from the pole group 30, such as by stamping to form the protrusion. Thus, during the production and assembly of the cover plate assembly 10, the connection process between the connecting column 32 and the connecting plate 31 is reduced, thereby simplifying the assembly steps and improving the production efficiency.

[0052] Meanwhile, if the connecting column 32 and the connecting plate 31 are separate parts, the connecting column 32 and the connecting plate 31 need to be manufactured through different molds and processes. However, since the connecting column 32 and the connecting plate 31 are integrally formed, they can be manufactured through one mold and process, thereby reducing the number of molds and the manufacturing processes of the connecting column 32 and the connecting plate 31.

[0053] In some embodiments of the present utility model, as Figures 3 - 7 shown, the connecting column 32 is welded to the bottom wall of the installation groove 21. One side of the connecting block 2 away from the pole group 30 has a sunk groove 22. The sunk groove 22 is disposed opposite to and spaced apart from the installation groove 21. The connecting block 2 between the sunk groove 22 and the installation groove 21 forms a first welding rib 23.

[0054] It can be understood that the first welding rib 23 is suitable for welding with the connecting column 32. The provision of the sunk groove 22 can prevent the welding mark from protruding from the end face of the connecting block 2 away from the pole group 30 (at the position other than the sunk groove 22), thereby facilitating the connection of the connecting block 2 with the electrical equipment. For example, in the present utility model, the first welding rib 23 and the connecting column 32 are welded by penetration welding. The laser penetrates the first welding rib 23 to melt and connect the first welding rib 23 and a part of the connecting column 32, achieving the purpose of electrical connection and fixation between the connecting piece assembly 3 and the connecting block 2.

[0055] In some embodiments of the present utility model, as Figures 4 - 7 shown, one side of the connecting column 32 facing the pole group 30 has a stamping groove 321. The connecting column 32 between the bottom wall of the stamping groove 321 and the end of the connecting column 32 away from the pole group 30 forms a second welding rib 33. The first welding rib 23 is suitable for welding with the second welding rib 33. The thickness of the second welding rib 33 is greater than the thickness of the first welding rib 23. It should be noted that the connecting column 32 and the connecting plate 31 are integral parts. The connecting column 32 is formed by a part of the connecting plate 31 protruding away from the pole group 30, and the stamping groove 321 and the protrusion are correspondingly arranged.

[0056] It can be understood that the provision of the stamping groove 321 reduces the weight of the connecting column 32, thereby saving costs. And the thickness of the second welding rib 33 is greater than the thickness of the first welding rib 23, thereby preventing the bottom of the stamping groove 321 from being completely penetrated by welding, thus improving the welding yield.

[0057] In some embodiments of the present utility model, asFigure 2 , Figure 6 and Figure 7 As shown in Figure 2 , Figure 6 , and Figure 7 , the connecting plate 31 includes a first plate 311 and a second plate 312. A connecting column 32 is provided on the first plate 311 and is connected to the first plate 311. The second plate 312 is provided on a side of the first plate 311 facing away from the electrode group 30 and is connected to the first plate 311. The second plate 312 is connected to the electrode tab 304 of the electrode group 30.

[0058] It can be understood that the second plate 312 is provided on a side of the first plate 311 facing away from the electrode group 30 and is connected to the first plate 311, facilitating the connection operation between the second plate 312 and the electrode tab 304 and improving the assembly efficiency. The connecting column 32 is provided on the first plate 311, avoiding interference between the connection of the second plate 312 and the electrode tab 304 and the connection of the connecting column 32 and the connecting block 2.

[0059] In some embodiments of the present invention, as Figure 2 and Figures 6 - 8 shown, on a side of the electrode group 30 facing the cover plate body 1, there are a positive electrode tab group 301 and a negative electrode tab group 302. The positive electrode tab group 301 and the negative electrode tab group 302 are spaced apart along the length direction of the cover plate body 1. There are two connecting piece assemblies 3 spaced apart along the length direction of the cover plate body 1 and respectively connected to the positive electrode tab group 301 and the negative electrode tab group 302.

[0060] It can be understood that the two connecting piece assemblies 3 are respectively used to lead the current of the positive electrode tab group 301 and the negative electrode tab group 302 to the connecting block 2. There are two connecting blocks 2, which are respectively used to lead the current of the positive electrode tab group 301 and the negative electrode tab group 302 to the electrical equipment. At the same time, there are two mounting holes 11 spaced apart along the length direction of the cover plate body 1, respectively for the two connecting blocks 2 to pass through. Thus, the circuit is connected and the electrical equipment works normally.

[0061] In some embodiments of the present invention, as Figure 2 and Figures 6 - 8 shown, the positive electrode tab group 301 includes a plurality of positive electrode tabs 3011 spaced apart along the width direction of the cover plate body 1, and the negative electrode tab group 302 includes a plurality of negative electrode tabs 3021 spaced apart along the width direction of the cover plate body 1. Each positive electrode tab 3011 and each negative electrode tab 3021 each include two electrode tabs 304 stacked and connected along the thickness direction of the connecting plate 31, and a slot 303 is formed by partial spacing between the two electrode tabs 304.

[0062] Among them, it should be noted that the provision of multiple positive electrode tabs 3011 and multiple negative electrode tabs 3021 facilitates the extraction of current and improves the over-current capacity. Among them, in the present utility model, there are two positive electrode tabs 3011 and two negative electrode tabs 3021 as well, but the present utility model is not limited thereto. The positive electrode tabs 3011 and the negative electrode tabs 3021 can be more, such as 3, 4, 5, or 6, etc. And the through slots 303 are also correspondingly multiple.

[0063] Furthermore, as Figure 2 and Figures 6 - 8 shown, the second plate 312 includes: a body portion 313 and multiple connecting portions 314. One end in the length direction of the body portion 313 is connected to the first plate 311; the multiple connecting portions 314 are spaced apart along the width direction of the cover plate body 1. The connecting portions 314 are provided at one end of the body portion 313 facing away from the first plate 311 and are connected to the body portion 313. The connecting portions 314 pass through the through slots 303 and are adapted to be connected to the inner walls of the through slots 303.

[0064] It can be understood that the connecting portions 314 passing through the through slots 303 and being adapted to be connected to the inner walls of the through slots 303 are, for example, welded connections. The connecting portions 314 passing through the through slots 303 can achieve the preliminary connection between the connecting portions 314 and the electrode tabs 304, facilitating subsequent fastening connection operations and improving the connection reliability and assembly efficiency between the connecting portions 314 and the electrode tabs 304. At the same time, the connecting portions 314 passing through the through slots 303 enable the connecting portions 314 to be connected to the inner walls of the through slots 303, increasing the connection area between the connecting portions 314 and the electrode tabs 304, thereby further improving the connection reliability between the connecting portions 314 and the electrode tabs 304 and also improving the over-current capacity between the connecting portions 314 and the electrode tabs 304.

[0065] Furthermore, as Figure 2 and Figure 8 shown, one end of the through slot 303 along the width direction of the connecting plate 31 is open to form a first through opening, and both ends of the through slot 303 along the length direction of the connecting plate 31 are open to form two second through openings. The provision of the first through opening and the second through openings facilitates the insertion of the connecting portions 314 into the through slots 303 and improves the assembly efficiency. One end of the two electrode tabs 302 facing away from the first through opening is connected to each other, thereby realizing the connection of the two electrode tabs 302.

[0066] Furthermore, as Figure 2 and Figure 8As shown in the figure, in the connecting piece assembly 3 corresponding to the positive tab group 301, there are multiple connecting parts 314 that correspond one-to-one to the through slots 303 in the positive tab group 301. For example, if there are two through slots 303 in the positive tab group 301, there are also two connecting parts 314 in the connecting piece assembly 3 corresponding to the positive tab group 301; in the connecting piece assembly 3 corresponding to the negative tab group 302, there are multiple connecting parts 314 that correspond one-to-one to the through slots 303 in the negative tab group 302. For example, if there are two through slots 303 in the negative tab group 302, there are also two connecting parts 314 in the connecting piece assembly 3 corresponding to the negative tab group 302.

[0067] Thus, the overcurrent capacity can be improved. At the same time, the multiple connecting parts 314 are spaced apart along the width direction of the cover plate body 1, which can avoid the installation interference between the multiple connecting parts 314 in one connecting piece assembly 3.

[0068] In some embodiments of the present invention, as Figures 5 - 7 shown, along the direction from the connecting block 2 to the battery cell group 30, the inner peripheral wall of the end of the installation slot 21 facing the battery cell group 30 extends obliquely away from the axis of the installation slot 21, and the outer peripheral wall of the end of the connecting column 32 facing away from the battery cell group 30 extends obliquely away from the axis of the connecting column 32. Thus, it is convenient for the connecting column 32 to enter the installation slot 21, thereby improving the assembly efficiency.

[0069] Next, refer to the attached Figure 1 description of the battery 100 according to the present invention.

[0070] As Figure 1 shown, the battery 100 according to an embodiment of the present invention includes the above-mentioned cover plate assembly 10.

[0071] For the battery 100 according to an embodiment of the present invention, by providing the above-mentioned cover plate assembly 10, the connecting block 2 is passed through the installation hole 11. One side of the connecting block 2 facing the battery cell group 30 has an installation slot 21; the connecting piece assembly 3 is connected to the tab 304 of the battery cell group 30 and is connected to the bottom wall of the installation slot 21, so that the connecting piece assembly 3 can not only realize the connection with the battery cell group 30, but also realize the connection with the connecting block 2, reducing the steps of connecting intermediate parts such as pole columns, thereby simplifying the assembly steps and improving the production efficiency. At the same time, the connecting block 2 also realizes dual functions, thereby reducing the setting of corresponding components, making the cover plate assembly 10 simple in structure and reducing the production cost.

[0072] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean 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 expressions 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.

[0073] 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 spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, characterized in that, For a battery, the battery having a pole group, the cover plate assembly comprising: A cover plate body having mounting holes thereon; A connecting block passing through the mounting holes, and having a mounting groove on a side thereof facing the pole group; A connecting piece assembly connected to the pole tabs of the pole group and connected to the bottom wall of the mounting groove.

2. The cover plate assembly according to claim 1, wherein, The connecting piece assembly includes: A connecting plate disposed between the connecting block and the pole group and connected to the pole tabs of the pole group; A connecting column disposed on the connecting plate and connected to the connecting plate, the connecting column being adapted to be disposed in the mounting groove and connected to the bottom wall of the mounting groove.

3. The cover plate assembly according to claim 2, wherein, The connecting column and the connecting plate are integrally formed, and the connecting column is formed by a part of the connecting plate protruding away from the pole group.

4. The cover plate assembly according to claim 2, wherein, The connecting column is welded to the bottom wall of the mounting groove, and a counterbore is provided on a side of the connecting block facing away from the pole group, the counterbore being disposed opposite to and spaced apart from the mounting groove, and the connecting block between the counterbore and the mounting groove forms a first welding rib.

5. The cover plate assembly according to claim 4, wherein, A stamping groove is provided on a side of the connecting column facing the pole group, and the connecting column between the bottom wall of the stamping groove and the end of the connecting column facing away from the pole group forms a second welding rib, the first welding rib being adapted to be welded to the second welding rib, and the thickness of the second welding rib is greater than the thickness of the first welding rib.

6. The cover plate assembly according to claim 2, wherein, The connecting plate includes: A first plate, the connecting column being disposed on the first plate and connected to the first plate; A second plate disposed on a side of the first plate facing away from the pole group and connected to the first plate, the second plate being connected to the pole tabs of the pole group.

7. The cover plate assembly according to claim 6, wherein, On a side of the pole group facing the cover plate body, there are a positive pole tab group and a negative pole tab group, the positive pole tab group and the negative pole tab group being spaced apart along the length direction of the cover plate body, and there are two connecting piece assemblies spaced apart along the length direction of the cover plate body and respectively connected to the positive pole tab group and the negative pole tab group.

8. The cover plate assembly according to claim 7, wherein The positive pole tab group includes a plurality of positive pole tabs spaced apart along the width direction of the cover plate body, the negative pole tab group includes a plurality of negative pole tabs spaced apart along the width direction of the cover plate body, each positive pole tab and each negative pole tab each include two pole tabs stacked and connected along the thickness direction of the connecting plate, and a through groove is formed by partial spacing between the two pole tabs, and the second plate includes: A body portion, one end in the length direction of the body portion being connected to the first plate; A plurality of connecting portions spaced apart along the width direction of the cover plate body, the connecting portions being disposed at an end of the body portion facing away from the first plate and connected to the body portion, the connecting portions passing through the through groove and being adapted to be connected to the inner wall of the through groove.

9. The cover plate assembly according to claim 2, wherein, Along the direction from the connecting block to the pole group, the inner peripheral wall of the end of the mounting groove facing the pole group extends obliquely away from the axis of the mounting groove, and the outer peripheral wall of the end of the connecting column facing away from the pole group extends obliquely away from the axis of the connecting column.

10. A battery, characterized in that, Including the cover plate assembly according to any one of claims 1-9.

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