Battery cover plate assembly and single battery

Abstract

The utility model belongs to the technical field of power batteries, and discloses a battery cover plate assembly and a single battery. The battery cover plate assembly comprises a cover plate body, two pole columns and two current collecting plates, the two poles are arranged on the cover plate body at an interval, and each pole penetrates through the cover plate body in an insulating and sealing manner; the two current collecting plates are arranged in an insulating manner; one ends of the two current collecting plates are connected to the inner connecting parts of the two pole columns in a one-to-one correspondence manner; the other ends of the two current collecting plates extend out of the cover plate body along the radial direction of the cover plate body and can be connected with two tabs of the battery cell in a one-to-one correspondence manner; the flow collecting plate can be folded, so that the other end of the flow collecting plate can be folded in the cover plate body. According to the battery cover plate assembly, the positive pole and the negative pole can be arranged on the same side of the battery, the structural internal resistance is reduced, meanwhile, the battery packaging process is simple and convenient, and the packaging efficiency and the yield are relatively high.

Description

Technical Field

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

[0002] Cylindrical batteries are a common type of battery cell structure. In traditional cylindrical batteries, the positive and negative electrodes are located at both ends of the battery. The current needs to be conducted longitudinally along the electrode plates, resulting in a long current flow path and high internal resistance.

[0003] To reduce battery internal resistance, existing technologies propose designing the positive and negative electrodes on the same side, shortening the current flow path, reducing internal resistance, and decreasing heat accumulation during charging and discharging to improve fast-charging safety. However, the existing cylindrical battery design with the positive and negative electrodes on the same side requires welding the positive and negative electrodes of the cell to the corresponding current collectors during assembly, and then welding the current collectors to the battery cover. This process is difficult for battery encapsulation and results in low encapsulation efficiency and yield.

[0004] Therefore, there is an urgent need for a battery cover assembly and a single battery cell to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a battery cover assembly that can place the positive and negative terminals on the same side of the battery, thereby reducing the internal resistance of the structure. At the same time, the battery encapsulation process is simple, and the encapsulation efficiency and yield are high.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The battery cover assembly includes a cover body, two terminal posts, and two current collectors;

[0008] Two of the aforementioned pole posts are spaced apart on the aforementioned cover plate body, and each of the aforementioned pole posts is insulated and sealed through the aforementioned cover plate body;

[0009] The two current collectors are insulated from each other; one end of each current collector is connected to the inner connection portion of each of the two poles; the other end of each current collector extends radially out of the cover plate body and can be connected to the two tabs of the battery cell; the current collectors can be folded so that the other end of the current collector can be folded into the cover plate body.

[0010] Optionally, the above-mentioned collector disk includes:

[0011] The first connecting part is connected to the inner connecting part of the pole post;

[0012] The second connecting part is used to connect with the electrode tab;

[0013] The folding portion is connected between the first connecting portion and the second connecting portion, and the folding portion can be bent so that the first connecting portion and the second connecting portion partially overlap.

[0014] Optionally, it also includes a first insulating member disposed between the two current collectors to insulate the two current collectors.

[0015] Optionally, the first insulating member includes a partition and two coated portions, the two coated portions being respectively disposed on both sides of the partition, and the coated portions being at least partially coated and connected to the current collector.

[0016] Optionally, it also includes a second insulating member, which is disposed on the side of the cover plate body facing the interior of the single cell. The electrode post passes through the second insulating member, and the outer periphery of the second insulating member is provided with a flange to form an insulating area. The flange can abut against the cell.

[0017] Optionally, the aforementioned flange has an opening, and both of the aforementioned collector plates pass through the aforementioned opening.

[0018] Optionally, it also includes two sealing elements, which are fitted one-to-one with the two pole posts to make a sealed connection between the pole posts and the cover plate body.

[0019] Optionally, it also includes two third insulating members, which are disposed on the outer connection portion of the electrode post and on the side of the cover plate body away from the inside of the battery.

[0020] Optionally, the aforementioned pole and the aforementioned manifold are welded together.

[0021] Another objective of this invention is to provide a single-cell battery that can place the positive and negative terminals on the same side of the battery, thereby reducing the internal resistance of the structure. At the same time, the battery packaging process is simple, and the packaging efficiency and yield are high.

[0022] To achieve this objective, the present invention adopts the following technical solution:

[0023] A single battery cell includes a casing, a cell, and the aforementioned battery cover assembly. The cell is disposed within the casing, and the battery cover assembly is used to seal the casing. The two current collectors of the battery cover assembly are connected one-to-one to the two tabs of the cell.

[0024] The beneficial effects of this utility model are:

[0025] This invention provides a battery cover assembly and a single battery cell. By placing both the positive and negative terminals on the cover body, the internal resistance of the structure is reduced. Furthermore, by integrating the current collector into the battery cover assembly, multiple welding processes are eliminated during the assembly of the single battery cell, simplifying the welding procedure and improving assembly convenience. Moreover, the current collector is foldable, allowing one end to protrude from the cover body during welding of the current collector to the cell's tabs. After welding, the current collector is folded back into the cover body, facilitating the welding of the current collector to the cell's tabs. This design greatly simplifies the assembly process and reduces the difficulty of assembling the battery cover assembly into the single battery cell, improving assembly efficiency and yield. Attached Figure Description

[0026] Figure 1 This is the isometric view of the battery cover assembly provided in a specific embodiment of this utility model. Figure 1 ;

[0027] Figure 2 This is the isometric view of the battery cover assembly provided in a specific embodiment of this utility model. Figure 2 ;

[0028] Figure 3 This is a partial exploded view of the battery cover assembly provided in a specific embodiment of this utility model;

[0029] Figure 4 This is an exploded view of the battery cover assembly provided in a specific embodiment of this utility model;

[0030] Figure 5 This is a cross-sectional view of a single battery provided in a specific embodiment of this utility model;

[0031] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 This is an exploded view of a single battery provided in a specific embodiment of this utility model.

[0033] In the picture:

[0034] 10. Cover plate body; 101. Mounting hole;

[0035] 20. Pole post;

[0036] 30. Collector plate; 31. First connecting part; 32. Second connecting part; 33. Folding part;

[0037] 40. First insulating component; 41. Separator; 42. Glue-coated part;

[0038] 50. Second insulating component; 51. Flanged edge; 511. Opening;

[0039] 60. Sealing element; 70. Third insulating element;

[0040] 200, casing; 300, battery cell; 310, tab. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] The following reference Figures 1 to 7 This invention introduces the battery cover assembly and individual battery cells provided by this utility model.

[0046] Please refer to Figures 1 to 6This embodiment provides a battery cover assembly, which includes a cover body 10, two terminals 20, and two current collectors 30. The two terminals 20 are spaced apart from each other on the cover body 10, and each terminal 20 is insulated and sealed through the cover body 10. The two current collectors 30 are insulated from each other. One end of each current collector 30 is connected to the inner connection portion of the two terminals 20. The other end of each current collector 30 extends radially out of the cover body 10 and can be connected to the two tabs 310 of the battery cell 300. The current collectors 30 can be folded so that the other end of the current collector 30 can be folded inside the cover body 10.

[0047] In this embodiment, the battery cover assembly places both the positive and negative terminals on the cover body 10, reducing internal structural resistance. Furthermore, by integrating the current collector 30 into the battery cover assembly, multiple welding processes are eliminated during the assembly of individual cells, simplifying the welding procedure and improving assembly convenience. Moreover, the current collector 30 is foldable, allowing its other end to extend out of the cover body 10 during welding to the tab 310 of the cell 300. After welding, the current collector 30 is folded back into the cover body 10, facilitating the welding of the current collector 30 to the tab 310 of the cell 300. This design greatly simplifies the assembly process and reduces the difficulty of assembling the battery cover assembly into individual cells, improving assembly efficiency and yield.

[0048] It should be noted that one of the two terminals 20 is the positive terminal and the other is the negative terminal. The positive terminal is used for the positive output of the single cell, and the negative terminal is used for the negative output of the single cell. Similarly, one of the two current collectors 30 is the positive current collector and the other is the negative current collector. One of the two tabs 310 of the cell 300 is the positive tab and the other is the negative tab. The two ends of the positive current collector are connected to the positive tab and the positive terminal of the cell 300, respectively, and the two ends of the negative current collector are connected to the negative tab and the negative terminal of the cell 300, respectively, to realize the internal and external electrical connection of the single cell.

[0049] Optionally, the cover plate body 10 also has two mounting holes 101, which are used to install two tabs 310 respectively, so as to realize the installation and internal and external connection of the tabs 310.

[0050] Optionally, the pole post 20 and the cover plate body 10 can be riveted together, glued together, or riveted together by providing a pressing annular boss on the cover plate body 10. That is, the pole post 20 and the cover plate body 10 can be directly connected by the pole post 20 passing through the mounting hole 101 and riveted together with both sides of the cover plate body 10; or, a riveting block can be included, with the pole post 20 passing through the mounting hole 101 and riveting together with the riveting block; or, the pole post 20 can be glued together and connected to the cover plate body 10 by passing through the mounting hole 101; or, the cover plate body 10 can have a pressing annular boss, with the pole post 20 passing through the mounting hole 101 and partially riveted together with the pressing annular boss. All of the above methods can achieve the fixation between the pole post 20 and the cover plate body 10.

[0051] Specifically, the electrode post 20 includes a middle connection part, an inner connection part, and an outer connection part. The inner connection part and the outer connection part are located at both ends of the middle connection part. The inner connection part is used to connect and fix with the electrode tab 310 of the cell 300. The middle connection part is sealed through the mounting hole 101. The outer connection part is used to realize the external connection of the single cell.

[0052] Optionally, the electrode post 20 and the current collector 30 are connected by welding to increase the connection strength between the two, thereby making the current transmission of the single cell stable.

[0053] Please refer to Figures 1 to 6 In this embodiment, the current collector 30 includes a first connecting part 31, a second connecting part 32, and a folding part 33. The first connecting part 31 is connected to the inner connecting part of the terminal post 20; the second connecting part 32 is used to connect to the tab 310; the folding part 33 is connected between the first connecting part 31 and the second connecting part 32. The folding part 33 can be bent so that the first connecting part 31 and the second connecting part 32 partially overlap, so that the current collector 30 can be welded to the terminal post 20 and the tab 310 respectively without interfering with each other. After welding, folding can complete the corresponding installation of the battery cover assembly and the housing 200, simplifying the welding difficulty.

[0054] Specifically, the inner connecting part of the pole post 20 is provided with a connecting protrusion, and the first connecting part 31 is provided with a connecting hole. The connecting hole is sleeved on the outer periphery of the connecting protrusion and is abutted by the inner connecting part to realize the installation positioning between the collector plate 30 and the pole post 20.

[0055] Furthermore, the battery cover assembly also includes a first insulating member 40, which is disposed between the two current collectors 30 to insulate the two current collectors 30 and achieve mutual insulation between the positive and negative electrode paths.

[0056] Specifically, the first insulating member 40 includes a partition 41 and two coated portions 42. The two coated portions 42 are respectively disposed on both sides of the partition 41, and the coated portions 42 are coated and connected to at least a portion of the collector plate 30. This arrangement not only fixes the two collector plates 30, but also allows the coated portions 42 to cover at least a portion of the structure of the collector plate 30, achieving insulation on the side of the collector plate 30 closest to the other collector plate 30. Furthermore, the partition 41 ensures that there is a certain distance between the two, thereby increasing the insulation gap between the two collector plates 30 and further improving its safety.

[0057] More specifically, the rubber-coated part 42 is provided with a number of protruding posts, and the current collector 30 is provided with a number of limiting holes. The protruding posts and limiting holes are provided in a one-to-one correspondence to increase the connection strength between the first insulating part 40 and the current collector 30.

[0058] In this embodiment, the battery cover assembly further includes a second insulating member 50, which is disposed on the side of the cover body 10 facing the inside of the battery. The terminal post 20 passes through the second insulating member 50. The second insulating member 50 is used to insulate the terminal post 20 from the cover body 10, and also to insulate the current collector 30 from the cover body 10.

[0059] Optionally, the outer periphery of the second insulating member 50 is provided with a flange 51 to form an insulating area. The flange 51 can abut against the cell 300. This arrangement ensures that the inner connection parts of the current collector 30 and the terminal post 20 are both located within the insulating area, thereby avoiding short circuit problems caused by contact between them and the cover plate or the housing 200 of the single cell, and improving the reliability of the single cell with the battery cover plate assembly installed.

[0060] Alternatively, the flange 51 has an opening 511 through which both collector plates 30 are inserted, so that the other end of the collector plate 30 can extend radially out of the cover plate body 10, making it more convenient to weld the other end of the collector plate 30 and greatly reducing the difficulty of welding the two.

[0061] Furthermore, the battery cover assembly also includes two sealing elements 60, which are fitted one-to-one with the two terminals 20 to achieve a sealed connection between the terminals 20 and the cover body 10. Specifically, a portion of the sealing element 60 is fitted onto the central connecting portion of the terminal 20 and is pressed and compressed by the central connecting portion and the wall of the mounting hole 101, thereby achieving a seal between the terminal 20 and the cover body 10.

[0062] Furthermore, the battery cover assembly also includes two third insulating members 70. The two third insulating members 70 are disposed on the outer connection part of the terminal post 20 and the side of the cover body 10 away from the inside of the battery, so as to realize the insulation between the outer connection part of the terminal post 20 and the cover body 10, thereby ensuring the safety of the battery cover assembly and the individual battery.

[0063] Of course, when the pole post 20 and the cover plate body 10 are connected by adhesive, the adhesive part can serve as a third insulating part 70, which can not only fix the two but also insulate them.

[0064] Please refer to Figures 5 to 7 This embodiment also provides a single battery cell, which includes a housing 200, a battery cell 300, and a battery cover assembly as described in any of the above embodiments. The battery cell 300 is disposed inside the housing 200, and the battery cover assembly is sealed and covered on the housing 200. The two current collectors 30 of the battery cover assembly are connected one-to-one to the two tabs 310 of the battery cell 300.

[0065] The current collector 30 is directly integrated into the battery cover assembly, eliminating the need for further assembly and welding. This simplifies the assembly process, improves assembly efficiency, and increases yield. Furthermore, both the positive and negative terminals are located on the cover body 10, ensuring that the positive and negative terminals of the battery are on the same side. This significantly improves the volume utilization of the battery and reduces its internal resistance.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cover assembly, characterized in that, It includes a cover plate body (10), two pole posts (20) and two collector plates (30); Two pole posts (20) are spaced apart on the cover plate body (10), and each pole post (20) is insulated and sealed through the cover plate body (10); The two current collectors (30) are insulated from each other; one end of each current collector (30) is connected to the inner connection of each of the two poles (20); the other end of each current collector (30) extends radially out of the cover plate body (10) and can be connected to the two tabs (310) of the battery cell (300); the current collector (30) can be folded so that the other end of the current collector (30) can be folded inside the cover plate body (10).

2. The battery cover assembly according to claim 1, characterized in that, The collector plate (30) includes: The first connecting part (31) is connected to the inner connecting part of the pole post (20); The second connecting part (32) is used to connect with the electrode tab (310); A folding portion (33) is connected between the first connecting portion (31) and the second connecting portion (32). The folding portion (33) can be bent so that the first connecting portion (31) and the second connecting portion (32) partially overlap.

3. The battery cover assembly according to claim 1, characterized in that, It also includes a first insulating element (40) disposed between the two current collectors (30) to insulate the two current collectors (30).

4. The battery cover assembly according to claim 3, characterized in that, The first insulating member (40) includes a partition (41) and two coated parts (42). The two coated parts (42) are respectively disposed on both sides of the partition (41), and the coated parts (42) are connected to at least a portion of the collector plate (30) with adhesive coating.

5. The battery cover assembly according to any one of claims 1-4, characterized in that, It also includes a second insulating member (50), which is disposed on the side of the cover plate body (10) facing the inside of the single cell. The electrode post (20) passes through the second insulating member (50). The outer periphery of the second insulating member (50) is provided with a flange (51) to form an insulating area. The flange (51) can abut against the cell (300).

6. The battery cover assembly according to claim 5, characterized in that, The flange (51) has an opening (511), and both of the collector plates (30) pass through the opening (511).

7. The battery cover assembly according to any one of claims 1-4, characterized in that, It also includes two sealing elements (60), which are fitted one-to-one with the two pole posts (20) to make a sealed connection between the pole posts (20) and the cover plate body (10).

8. The battery cover assembly according to any one of claims 1-4, characterized in that, It also includes two third insulating elements (70), which are disposed on the outer connection portion of the pole post (20) and on the side of the cover plate body (10) away from the inside of the battery.

9. The battery cover assembly according to any one of claims 1-4, characterized in that, The pole post (20) and the collector plate (30) are welded together.

10. A single-cell battery, characterized in that, The battery includes a housing (200), a battery cell (300), and a battery cover assembly as described in any one of claims 1-9. The battery cell (300) is disposed inside the housing (200), and the battery cover assembly is sealed over the housing (200). The two current collectors (30) of the battery cover assembly are connected one-to-one to the two tabs (310) of the battery cell (300).

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