All-tab battery cover plate integrated with current collector function

Abstract

The utility model relates to the technical field of batteries, in particular to a full-tab battery cover plate integrated with a current collector function, which comprises an aluminum shell body, a roll core body is arranged in the aluminum shell body, a positive electrode cover plate body is arranged on the top surface of the aluminum shell body, a center hole body is arranged in the positive electrode cover plate body, and a current collector is arranged in the center hole body. A positive pole is welded on the top surface of the positive pole cover plate body, and a liquid injection hole is formed in the positive pole; and the sealing plug is installed in the liquid injection hole, and a sealing piece is arranged in the positive pole column. The bottom end of the roll core body, the negative electrode cover plate and the insulation sheet are installed, the overall installation effect is good, meanwhile, according to the design, the positive electrode cover plate body integrates the function of a current collector and is directly welded to the roll core body, the battery assembly procedures are reduced, the production efficiency is improved, meanwhile, the BOM cost is reduced, the internal space is enlarged, and the service life of the battery is prolonged. And the battery capacity can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a full-tab battery cover plate integrating the function of a current collector. Background Technique

[0002] The full-tab cylindrical lithium-ion battery is a key development direction of power batteries at present. The traditional cylindrical battery usually consists of a shell, a positive cover plate assembly, a negative cover plate assembly and a wound core. At present, most of the cylindrical battery shells are open at both ends. The positive cover plate assembly and the negative cover plate assembly are respectively arranged at both ends of the shell and are respectively welded to the tabs at both ends of the wound core arranged in the shell.

[0003] In this regard, Chinese Patent Application No.: CN220474851U discloses a negative current collector plate assembly and a cylindrical battery, which includes a negative pole column, a negative current collector plate and a first insulating member. The negative pole column is fixedly arranged on the first insulating member. One end of the negative pole column is connected to the negative current collector plate arranged below the first insulating member, and the other end is used to connect to the negative end of the battery shell. A plurality of through holes are equidistantly arranged on the surface of the first insulating member around the central axis of the negative pole column. The plurality of through holes are located on the outer peripheral side of the negative pole column and are used to weld the negative current collector plate to the negative end of the wound core through the through holes. The utility model directly connects the negative pole column to the wound core through the negative current collector plate, omits the use of a connecting piece, shortens the connection distance between the negative pole column and the wound core, and the entire negative current collector plate assembly occupies less space in the axial direction in the battery shell. Therefore, the space utilization rate of the wound core in the battery can be improved, and the battery energy density can be increased.

[0004] However, in actual use, the positive cover plate cannot realize the function of a current collector, the production efficiency is relatively low, and the cost will also increase. When connecting, the docking stability of the negative cover plate during installation is relatively poor. Therefore, improving and improving the above problems has become an urgent problem to be solved at present. Content of the Utility Model

[0005] The purpose of the utility model is to provide a full-tab battery cover plate integrating the function of a current collector to solve the problems that the positive cover plate cannot realize the function of a current collector, the production efficiency is relatively low, the cost will also increase, and the docking stability of the negative cover plate during installation is relatively poor as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a full-tab battery cover plate integrating the function of a current collector, including an aluminum shell body, a wound core body is arranged inside the aluminum shell body, a positive cover plate body is arranged on the top surface of the aluminum shell body, a central hole body is opened inside the positive cover plate body, a positive pole column is welded on the top surface of the positive cover plate body, and a liquid injection hole is opened inside the positive pole column;

[0007] Sealing plug, the sealing plug is installed inside the liquid injection hole, a sealing piece is arranged inside the positive electrode post, and a negative electrode cover plate is arranged at the lower end of the aluminum shell body.

[0008] Preferably, a through hole is opened inside the negative electrode cover plate, an insulating sheet is arranged at the lower end of the negative electrode cover plate, and a negative electrode post is installed on the lower surface of the negative electrode cover plate.

[0009] Preferably, an installation plate is arranged at the lower end of the insulating sheet, and an installation groove is opened inside the installation plate.

[0010] Preferably, a safety valve is installed inside the installation plate, and the insulating sheet is in contact installation with the installation plate.

[0011] Preferably, an adaptation groove is opened inside the insulating sheet, the adaptation groove and the installation groove are adapted to each other, holes are opened on the surface of the insulating sheet, an alignment post is arranged inside the holes, and the alignment post is installed on the lower surface of the negative electrode cover plate.

[0012] Preferably, the aluminum shell body is made of aluminum or aluminum alloy, and the core body is a full-tab core.

[0013] Preferably, the thickness of the positive electrode cover plate body is 1.0 - 2.0 mm, the height of the bottom convex is 0.1 - 1.0 mm, the diameter of the central hole body is 1.0 - 5.0 mm, and the diameter of the liquid injection hole is 1.0 - 5.0 mm.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. For this full-tab battery cover plate integrating the function of current collector, when in use, first install the positive electrode cover plate body on the top surfaces of the aluminum shell body and the core body, then weld the positive electrode post and the positive electrode cover plate body. Through the design of the central hole body and the liquid injection hole, liquid injection can be carried out, and the overall liquid injection is more convenient. At the same time, during use, the liquid injection hole can be integrally sealed by the sealing plug and the sealing piece, and the overall sealing effect is better. Then, the bottom end of the core body is installed with the negative electrode cover plate and the insulating sheet, and the overall installation effect is better. At the same time, the design lies in that the positive electrode cover plate body integrates the function of current collector and is directly welded with the core body, reducing the battery assembly process, improving the production efficiency, reducing the BOM cost, increasing the internal space, and improving the battery capacity.

[0016] 2. The full-tab battery cover plate integrating the function of the current collector can stably install the negative cover plate and the negative electrode column through the mutual adaptation between the negative electrode column and the adaptation groove and the installation groove when in use by means of the arranged insulating sheet, mounting plate, mounting groove, safety valve, adaptation groove, hole and alignment column. Meanwhile, when the negative cover plate and the insulating sheet are installed, the alignment column can be directly installed into the hole, with relatively high overall installation efficiency and fast alignment speed. Then, the safety valve can ensure the safety of the overall aluminum shell body during use, reflecting the functionality of the design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of the structure of the present utility model;

[0018] Figure 2 is an exploded schematic diagram of the aluminum shell body and the mounting plate structure of the present utility model;

[0019] Figure 3 is an exploded schematic diagram of the positive cover plate body and the positive electrode column structure of the present utility model;

[0020] Figure 4 is an exploded schematic diagram of the negative cover plate and the negative electrode column structure of the present utility model.

[0021] In the figure: 1. Aluminum shell body; 2. Core body; 3. Positive cover plate body; 4. Central hole body; 5. Positive electrode column; 6. Liquid injection hole; 7. Sealing plug; 8. Sealing sheet; 9. Negative cover plate; 10. Through hole; 11. Insulating sheet; 12. Mounting plate; 13. Mounting groove; 14. Safety valve; 15. Adaptation groove; 16. Hole; 17. Alignment column; 18. Negative electrode column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1 - 4 , an embodiment provided by the present utility model:

[0024] An all - tab battery cover plate integrating the function of a current collector. The winding core body 2, the positive cover plate body 3, the negative cover plate 9, the safety valve 14, and the negative terminal 18 used in this application are all products that can be directly purchased on the market. Their principles and connection methods are all well - known prior arts in the field, so they will not be elaborated here. It includes an aluminum shell body 1. Inside the aluminum shell body 1, there is a winding core body 2. On the top surface of the aluminum shell body 1, there is a positive cover plate body 3. Inside the positive cover plate body 3, there is a central hole body 4. On the top surface of the positive cover plate body 3, there is a positive terminal 5 welded. Inside the positive terminal 5, there is a liquid injection hole 6. The aluminum shell body 1 is made of aluminum or aluminum alloy. The winding core body 2 is an all - tab winding core. The thickness of the positive cover plate body 3 is 1.0 - 2.0 mm, the height of the bottom protrusion is 0.1 - 1.0 mm, the diameter of the central hole body 4 is 1.0 - 5.0 mm, and the diameter of the liquid injection hole 6 is 1.0 - 5.0 mm;

[0025] A sealing plug 7 is installed inside the liquid injection hole 6. Inside the positive terminal 5, there is a sealing piece 8. At the lower end of the aluminum shell body 1, there is a negative cover plate 9. Inside the negative cover plate 9, there is a through - hole 10. At the lower end of the negative cover plate 9, there is an insulating sheet 11. On the lower surface of the negative cover plate 9, there is a negative terminal 18 installed. At the lower end of the insulating sheet 11, there is a mounting plate 12. Inside the mounting plate 12, there is a mounting groove 13. Inside the mounting plate 12, there is a safety valve 14 installed. The insulating sheet 11 is installed in contact with the mounting plate 12. Inside the insulating sheet 11, there is an adapter groove 15, and the adapter groove 15 and the mounting groove 13 are mutually adapted. On the surface of the insulating sheet 11, there are holes 16. Inside the holes 16, there is an alignment post 17, and the alignment post 17 is installed on the lower surface of the negative cover plate 9. First, by installing the positive cover plate body 3 on the top surface of the aluminum shell body 1 and the winding core body 2, and then by welding the positive terminal 5 and the positive cover plate body 3, the liquid injection can be carried out through the design of the central hole body 4 and the liquid injection hole 6, which is more convenient during the overall liquid injection. At the same time, when in use, the sealing plug 7 and the sealing piece 8 can seal the liquid injection hole 6 as a whole, and the overall sealing effect is better. Then, the bottom end of the winding core body 2 is installed with the negative cover plate 9 and the insulating sheet 11, and the overall installation effect is better. At the same time, the design of this application is that the positive cover plate body 3 integrates the function of a current collector and is directly welded to the winding core body 2, reducing the battery assembly process, improving the production efficiency, reducing the BOM cost, increasing the internal space, and improving the battery capacity. Through the mutual adaptation between the negative terminal 18 and the adapter groove 15 and the mounting groove 13, the negative cover plate 9 and the negative terminal 18 can be stably installed. At the same time, when the negative cover plate 9 and the insulating sheet 11 are installed, the alignment post 17 can be directly installed into the holes 16. The overall installation efficiency is high and the alignment speed is fast. Then, through the safety valve 14, the safety of the overall aluminum shell body 1 during use can be ensured.

[0026] Working principle: When the staff uses this device, first connect the device to an external power supply to provide power support for the device. First, install the positive cover body 3 on the top surfaces of the aluminum shell body 1 and the core body 2, and then weld the positive electrode column 5 to the positive cover body 3. Through the design of the central hole body 4 and the liquid injection hole 6, liquid injection can be carried out, which is relatively convenient during the overall liquid injection. At the same time, when in use, the liquid injection hole 6 can be completely sealed by the sealing plug 7 and the sealing sheet 8, and the overall sealing effect is good. Then, the bottom end of the core body 2 is installed with the negative cover 9 and the insulating sheet 11, and the overall installation effect is good. At the same time, the design of this device is that the positive cover body 3 integrates the function of the current collector and is directly welded to the core body 2. Through the mutual adaptation between the negative electrode column 18 and the adaptation groove 15 and the installation groove 13, the negative cover 9 and the negative electrode column 18 can be stably installed. At the same time, when the negative cover 9 and the insulating sheet 11 are installed, directly install the alignment column 17 into the hole 16. Then, the safety valve 14 can ensure the safety of the overall aluminum shell body 1 during use. The above is all the working principles of this utility model.

[0027] The above is only a preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model; any ordinary technical personnel in this industry can smoothly implement the present utility model according to the instructions in the attached drawings and the above description; however, any slight changes, modifications, and equivalent changes made by those skilled in this professional field without departing from the technical solution of the present utility model by using the technical content disclosed above are all equivalent embodiments of the present utility model; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An all-pole-ear battery cover plate integrating the function of a current collector, comprising an aluminum shell body (1), wherein a winding core body (2) is arranged inside the aluminum shell body (1), and is characterized in that: The top surface of the aluminum shell body (1) is provided with a positive electrode cover body (3). A central hole body (4) is formed inside the positive electrode cover body (3). A positive electrode column (5) is welded to the top surface of the positive electrode cover body (3). A liquid injection hole (6) is formed inside the positive electrode column (5). A sealing plug (7), the sealing plug (7) is installed inside the liquid injection hole (6). A sealing piece (8) is arranged inside the positive electrode column (5). A negative electrode cover (9) is arranged at the lower end of the aluminum shell body (1).

2. The all-pole-ear battery cover plate integrating the function of a current collector according to claim 1, characterized in that: A through hole (10) is formed inside the negative electrode cover (9). An insulating sheet (11) is arranged at the lower end of the negative electrode cover (9). A negative electrode column (18) is installed on the lower surface of the negative electrode cover (9).

3. The integrated current collector functional all-tab cell cover plate according to claim 2, wherein: An installation plate (12) is arranged at the lower end of the insulating sheet (11). An installation groove (13) is formed inside the installation plate (12).

4. The all-pole-ear battery cover plate integrating the function of a current collector according to claim 3, characterized in that: A safety valve (14) is installed inside the installation plate (12). The insulating sheet (11) is installed in contact with the installation plate (12).

5. The integrated current collector functional all-tab cell cover plate according to claim 2, characterized in that: An adaptation groove (15) is formed inside the insulating sheet (11). The adaptation groove (15) and the installation groove (13) are adapted to each other. A hole (16) is formed on the surface of the insulating sheet (11). An alignment column (17) is arranged inside the hole (16). The alignment column (17) is installed on the lower surface of the negative electrode cover (9).

6. The all-pole-ear battery cover plate integrating the function of a current collector according to claim 1, characterized in that: The aluminum shell body (1) is made of aluminum or aluminum alloy. The core body (2) is a full tab core.

7. The integrated current collector function all-tab battery cover plate according to claim 1, wherein: The thickness of the positive electrode cover body (3) is 1.0 - 2.0 mm, the height of the bottom protrusion is 0.1 - 1.0 mm, the diameter of the central hole body (4) is 1.0 - 5.0 mm, and the diameter of the liquid injection hole (6) is 1.0 - 5.0 mm.

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