Adapter piece and single battery

Abstract

The utility model belongs to the technical field of batteries, and discloses an adapter piece and a single battery, the adapter piece comprises a first connecting part, a second connecting part and a bending part, the first connecting part is used for being connected with a pole, the second connecting part is provided with a tab connecting area and a reinforcing rib, the tab connecting area is used for being connected with a tab, the reinforcing rib is arranged close to the tab connecting area, and the bending part is used for bending the tab connecting area. The first connecting part is connected with the second connecting part through the bending part, and the arrangement of the reinforcing ribs reduces the bending deformation probability of the area, close to the tab connecting area, of the second connecting part, so that the probability of short circuit and thermal runaway of the single battery caused by the fact that the pole group diaphragm is punctured is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a switching piece and a single battery. Background Art

[0002] A single cell battery usually includes a pole group, a connecting sheet, a battery shell and a top cover sheet, wherein the pole group and the connecting sheet are both arranged in the battery shell, the top cover sheet is sealed in the gap of the battery shell, the pole ears on the pole group are fixed to the connecting sheet by ultrasonic welding, and the pole posts on the top cover sheet are fixed to the connecting sheet by laser welding, thereby realizing electrical connection between the pole group and the pole posts.

[0003] When the width of the electrode group is large, a bending area is usually set on the connecting piece, one side of the bending area is the pole lug welding area, and the other side is the pole column welding area. After the connecting piece is welded to the pole lug and the pole column respectively, the pole lug welding area will be subjected to the pulling force of the pole lug, causing the connecting piece around the pole lug welding area to bend and deform, and then pierce the diaphragm of the electrode group, causing the single cell to short-circuit or even thermal runaway.

[0004] Therefore, it is urgent to propose an adapter and a single cell to solve the above technical problems. Utility Model Content

[0005] The first object of the utility model is to provide an adapter sheet, which can reduce the probability of bending and deformation of the area of ​​the second connecting portion close to the pole ear connection area, thereby reducing the probability of the pole group diaphragm being punctured, causing short circuit and thermal runaway problems in the single battery.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Adapter, including:

[0008] A first connecting portion, the first connecting portion is used to connect to a pole;

[0009] A second connecting portion, wherein the second connecting portion is provided with a pole lug connecting area and a reinforcing rib, the pole lug connecting area is configured to be connected to the pole lug, and the reinforcing rib is arranged close to the pole lug connecting area;

[0010] The first connection portion is connected to the second connection portion through the bending portion.

[0011] Optionally, the second connecting portion includes a first end and a second end arranged opposite to each other, the first end is connected to the first connecting portion via a bending portion, the pole ear connection area is located at the second end, and after the bending portion is bent, the positive projection of the first connecting portion on the second connecting portion is staggered with the pole ear connection area.

[0012] Optionally, the direction extending from the first end to the second end is a first direction, the reinforcing rib includes a first rib body, and the extending direction of the first rib body is parallel to the first direction.

[0013] Optionally, the number of the first ribs is two, the two first ribs are parallel to each other, and the two first ribs are spaced apart along a direction perpendicular to the first direction.

[0014] Optionally, the reinforcing rib further includes a second rib body, and the two first rib bodies are connected by the second rib body.

[0015] Optionally, the number of the second tendons is two, the two second tendons and the two first tendons are staggered and connected end to end, and / or the two second tendons are bent in arcs in directions away from each other.

[0016] Optionally, the number of the tab connection areas and the number of the reinforcing ribs are at least two and they correspond one to one.

[0017] Optionally, a gap is provided between each two adjacent tab connection areas, and the gap is opened on the side wall of the second end and extends toward the first end.

[0018] Optionally, the notch extends between two adjacent reinforcing ribs.

[0019] The second purpose of the utility model is to provide a single battery with high reliability and safety in use.

[0020] To achieve this purpose, the utility model adopts the following technical solutions:

[0021] A single cell battery comprises a pole group, a battery shell, a top cover and the above-mentioned adapter plate, wherein the pole group and the adapter plate are both arranged in the battery shell, the pole group comprises a core body and a pole ear, one end of the pole ear is connected to the pole group, and the other end is connected to the pole ear connection area, the top cover comprises a top cover sheet and a pole column, the top cover sheet is arranged at the opening of the battery shell, the pole column is penetrated by the top cover sheet, and the pole column is connected to the first connecting part.

[0022] Beneficial effects of the utility model:

[0023] The adapter provided by the utility model has a second connection portion provided with a pole lug connection area and a reinforcing rib, the pole lug connection area is used to connect with the pole lug, and the reinforcing rib is arranged close to the pole lug connection area, thereby improving the structural strength of the second connection portion near the pole lug connection area. After the first connection portion is connected to the pole column, the pole lug connection area is connected to the pole lug, and the bending portion is bent, the pole lug applies a tensile force to the pole lug connection area, and the arrangement of the reinforcing rib reduces the probability of bending and deformation of the area of ​​the second connection portion close to the pole lug connection area, thereby reducing the probability of the pole group diaphragm being pierced, causing the single cell battery to have a short circuit and thermal runaway problem.

[0024] The single cell battery provided by the utility model adopts the above-mentioned adapter, and the probability of bending and deformation of the second connecting portion of the adapter near the pole ear connecting area is low, thereby reducing the probability of the pole group diaphragm being punctured, which has the effect of improving the reliability and safety of the single cell battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the adapter sheet provided in this embodiment (when the bending portion is not bent);

[0026] Figure 2 is a schematic structural diagram of the adapter sheet (after the bending portion is bent) provided in this embodiment;

[0027] Figure 3 is a schematic diagram of the assembly structure of the adapter sheet and the top cover provided in this embodiment (when the bending portion is not bent);

[0028] Figure 4 is a schematic diagram of the assembly structure of the adapter sheet and the top cover provided in this embodiment (after the bending portion is bent);

[0029] Figure 5 It is a schematic diagram of the assembly structure of the adapter plate and the electrode group provided in this embodiment (after the bending portion is bent).

[0030] In the figure:

[0031] 11. Core body; 12. Pole ear; 21. Top cover; 22. Pole;

[0032] 100, first connecting portion; 200, second connecting portion; 210, tab connecting area; 220, reinforcing rib; 221, first rib body; 222, second rib body; 231, first end; 232, second end; 240, notch; 300, bending portion; 310, through hole. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] This embodiment provides a transition piece, which can reduce the probability of bending and deformation of the area of ​​the second connection portion close to the tab connection area, thereby reducing the probability of the electrode group separator being punctured, causing short circuit and thermal runaway problems in the single battery.

[0038] Specifically, Figures 1 to 5 As shown, the adapter plate includes a first connection portion 100, a second connection portion 200 and a bending portion 300, wherein the first connection portion 100 is used to connect to the pole 22, the second connection portion 200 is provided with a pole lug connection area 210 and a reinforcing rib 220, the pole lug connection area 210 is configured to be connected to the pole lug 12, the reinforcing rib 220 is arranged close to the pole lug connection area 210, and the first connection portion 100 is connected to the second connection portion 200 via the bending portion 300.

[0039] Based on the above design, the second connecting part 200 is provided with a pole lug connection area 210 and a reinforcing rib 220. The pole lug connection area 210 is used to connect with the pole lug 12, and the reinforcing rib 220 is arranged close to the pole lug connection area 210, thereby improving the structural strength of the second connecting part 200 near the pole lug connection area 210. After the first connecting part 100 is connected to the pole column 22, the pole lug connection area 210 is connected to the pole lug 12, and the bending part 300 is bent, the pole lug 12 applies a tensile force to the pole lug connection area 210. The arrangement of the reinforcing rib 220 reduces the probability of bending and deformation of the area of ​​the second connecting part 200 close to the pole lug connection area 210, thereby reducing the probability of the pole group diaphragm being punctured, causing short circuit and thermal runaway problems in the single battery.

[0040] Optionally, the first connection portion 100 is fixed to the pole 22 by laser welding, and the pole tab connection area 210 is fixed to the pole tab 12 by ultrasonic welding. Of course, the connection between the first connection portion 100 and the pole 22 and the connection between the pole tab connection area 210 and the pole tab 12 can also be achieved by other methods, which are not listed here. It is understandable that the reinforcing rib 220 on the second connection portion 200 is staggered with the pole tab connection area 210 to avoid affecting the welding effect of the pole tab connection area 210 and the pole tab 12.

[0041] Alternatively, if Figures 1 to 5 As shown, the second connection part 200 includes a first end 231 and a second end 232 that are relatively arranged. The first end 231 is connected to the first connection part 100 through the bending part 300. The pole ear connection area 210 is located at the second end 232, and the reinforcing rib 220 is located between the first end 231 and the second end 232. After the bending part 300 is bent, the orthographic projection of the first connection part 100 on the second connection part 200 is staggered with the pole ear connection area 210. After the pole ear connection area 210 is connected to the pole ear 12 and the first connection part 100 is connected to the pole 22, the orthographic projection of the pole ear 12 on the second connection part 200 and the orthographic projection of the pole 22 on the second connection part 200 can be staggered with each other, thereby reducing the size of the single battery in the direction perpendicular to the second connection part 200 (z direction in the figure), which has the effect of improving the energy density of the single battery.

[0042] Alternatively, if Figures 1 to 5 As shown, the direction extending from the first end 231 to the second end 232 is the first direction (the x direction in the figure), and the reinforcing rib 220 includes a first rib body 221, and the extension direction of the first rib body 221 is parallel to the first direction. This structural design can improve the deformation resistance of the second connection part 200 in the first direction, and has the effect of further reducing the probability of bending deformation in the area of ​​the second connection part 200 close to the tab connection area 210.

[0043] Furthermore, if Figures 1 to 5As shown, there are two first ribs 221, the two first ribs 221 are parallel to each other, and the two first ribs 221 are spaced apart along a direction perpendicular to the first direction (the y direction in the figure), thereby further improving the structural strength of the second connection part 200 and the deformation resistance of the second connection part 200 in the first direction.

[0044] Preferably, if Figures 1 to 5 As shown, the reinforcing rib 220 also includes a second rib body 222, and the two first rib bodies 221 are connected by the second rib body 222, which further improves the structural strength of the second connecting part 200, and the second rib body 222 is respectively connected to the two first rib bodies 221 spaced apart in the y direction, which can improve the deformation resistance of the second connecting part 200 in the y direction to a certain extent.

[0045] Furthermore, if Figures 1 to 5 As shown, there are two second tendons 222, the two second tendons 222 and the two first tendons 221 are staggered and connected end to end, and the two second tendons 222 are bent in arcs in directions away from each other, that is, the reinforcing rib 220 as a whole is a runway-shaped structure. This design makes the overall structure of the reinforcing rib 220 more symmetrical and beautiful, and easy to process.

[0046] In another embodiment, the two second tendons 222 and the two first tendons 221 are interlaced and connected end to end, and the two second tendons 222 are strip structures extending along the y direction, that is, the reinforcing rib 220 is a square structure as a whole. Alternatively, the shapes of the two second tendons 222 can also be different, as long as the two second tendons 222 and the two first tendons 221 are interlaced, and the two first tendons 221 are connected by the two second tendons 222.

[0047] In another embodiment, the two second tendons 222 are bent in arc shapes in directions away from each other, and the second tendons 222 are connected to the non-end positions of the first tendons 221, and / or the first tendons 221 are connected to the non-end positions of the second tendons 222, that is, at least one of the first tendons 221 and the second tendons 222 extends out of the end of the other. This structural design can improve the reliability of the connection between the first tendons 221 and the second tendons 222 to a certain extent, thereby improving the reliability of the reinforcing ribs 220.

[0048] Of course, in other embodiments, the reinforcing ribs 220 may also be other shapes and structures. For example, the reinforcing ribs 220 may also be circular, strip-shaped, or wavy, etc., which are not listed here one by one.

[0049] Optionally, the reinforcing rib 220 in this embodiment is formed by a stamping process, such as Figures 1 to 5As shown, the reinforcing rib 220 protrudes from one side surface of the second connecting portion 200, and a pit is formed on the other side surface of the second connecting portion 200 at a position opposite to the reinforcing rib 220. The stamping process is a relatively mature production process in this field. The use of the stamping process to make the reinforcing rib 220 is conducive to reducing the production difficulty and improving the production efficiency. Of course, in other embodiments, the reinforcing rib 220 can also be made by other processes, for example, directly welding a convex rib on the second connecting portion 200 close to the tab connection area 210.

[0050] Alternatively, if Figures 1 to 5 As shown, there are at least two tab connection areas 210 and reinforcing ribs 220 in one-to-one correspondence, so that the connecting sheet can be connected to at least two tabs 12, and the area of ​​the second connecting portion 200 close to each tab connection area 210 has a higher structural strength.

[0051] Furthermore, if Figures 1 to 5 As shown, a notch 240 is provided between each two adjacent pole lug connection areas 210. The notch 240 is opened on the side wall of the second end 232 and extends toward the first end 231 to disconnect the second connection portion 200 between the two adjacent pole lug connection areas 210 to prevent the two adjacent pole lug connection areas 210 from vibrating and affecting each other when they are respectively connected to a corresponding pole lug 12.

[0052] Preferably, if Figures 1 to 5 As shown, the notch 240 extends between two adjacent reinforcing ribs 220. On the one hand, the extension length of the notch 240 is extended as much as possible, reducing the probability of mutual influence between the two adjacent pole lug connection areas 210. On the other hand, the existence of the notch 240 reduces the structural strength of the second connecting portion 200 close to the pole lug connection area 210 to a certain extent, so that the notch 240 extends between two adjacent reinforcing ribs 220, so that the reinforcing rib 220 can be as close to the pole lug connection area 210 as possible, thereby improving the structural strength of the area and reducing the probability of bending and deformation.

[0053] Furthermore, if Figures 1 to 5 As shown, part of the second connection part 200 between two adjacent reinforcing ribs 220 is disconnected by the notch 240, and part of the second connection part 200 between two adjacent reinforcing ribs 220 is not disconnected by the notch 240. This structural design can further increase the probability of bending and deformation of the second connection part 200 in the area close to the tab connection area 210.

[0054] This embodiment also provides a single cell battery with high reliability and safety in use.

[0055] Specifically, Figures 1 to 5As shown, the single cell includes a pole group, a battery shell (not shown in the figure), a top cover and the above-mentioned adapter, wherein the pole group and the adapter are both arranged in the battery shell, the pole group includes a core 11 and a pole ear 12, one end of the pole ear 12 is connected to the pole group, and the other end is connected to the pole ear connection area 210, the top cover includes a top cover sheet 21 and a pole column 22, the top cover sheet 21 is covered at the opening of the battery shell, the pole column 22 is penetrated by the top cover sheet 21, and the pole column 22 is connected to the first connection part 100. The single cell adopts the above-mentioned adapter, and the probability of bending and deformation problems occurring at the position of the second connection part 200 of the adapter close to the pole ear connection area 210 is low, thereby reducing the probability of the pole group diaphragm being pierced, which has the effect of improving the reliability and safety of the single cell.

[0056] Alternatively, if Figures 1 to 5 As shown, the reinforcing rib 220 on the adapter sheet protrudes toward the core body 11. Of course, in other embodiments, the reinforcing rib 220 may also protrude toward the top cover sheet 21. When the adapter sheet provided in this embodiment is used to assemble the pole lug 12 and the pole post 22, the first connecting portion 100 is first welded to the pole post 22 by a laser welding process, and then the pole lug connecting area 210 is welded to the pole lug 12 by an ultrasonic welding process, and finally the bending portion 300 is bent so that the axis of the bending portion 300 is parallel to the x-axis, thereby completing the assembly of the adapter sheet, the pole lug 12 and the pole post 22.

[0057] Alternatively, if Figures 1 to 5 As shown, a through hole 310 is opened on the bending portion 300. When the bending portion 300 is bent, the bending operation can be made more labor-saving, and the first connecting portion 100 and the second connecting portion 200 can be made smoother after bending, thereby providing a guarantee for the reliability of the connection between the first connecting portion 100 and the pole 22, and providing a guarantee for the reliability of the connection between the pole ear connection area 210 and the pole ear 12.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. The adapter is characterized in that: include: A first connection portion (100), the first connection portion (100) being used to be connected to a pole (22); A second connecting portion (200), the second connecting portion (200) being provided with a pole lug connecting area (210) and a reinforcing rib (220), the pole lug connecting area (210) being configured to be connected to the pole lug (12), and the reinforcing rib (220) being arranged close to the pole lug connecting area (210); A bending portion (300), wherein the first connecting portion (100) is connected to the second connecting portion (200) via the bending portion (300).

2. The adapter according to claim 1, characterized in that: The second connecting portion (200) comprises a first end (231) and a second end (232) which are arranged opposite to each other, the first end (231) is connected to the first connecting portion (100) via the bending portion (300), the pole lug connection area (210) is located at the second end (232), and after the bending portion (300) is bent, the orthographic projection of the first connecting portion (100) on the second connecting portion (200) is offset from the pole lug connection area (210).

3. The adapter according to claim 2, characterized in that: The direction extending from the first end (231) to the second end (232) is a first direction, and the reinforcing rib (220) comprises a first rib body (221), and the extending direction of the first rib body (221) is parallel to the first direction.

4. The adapter according to claim 3, characterized in that: The number of the first ribs (221) is two, the two first ribs (221) are parallel to each other, and the two first ribs (221) are spaced apart in a direction perpendicular to the first direction.

5. The adapter according to claim 4, characterized in that: The reinforcing rib (220) further includes a second rib body (222), and the two first rib bodies (221) are connected via the second rib body (222).

6. The adapter according to claim 5, characterized in that: The number of the second tendons (222) is two, the two second tendons (222) and the two first tendons (221) are interlaced and connected end to end, and / or the two second tendons (222) are bent in arc shapes in directions away from each other.

7. The adapter according to any one of claims 2 to 6, characterized in that: The number of the tab connection areas (210) and the number of the reinforcing ribs (220) are both at least two and correspond one to one.

8. The adapter according to claim 7, characterized in that: A notch (240) is provided between each two adjacent tab connection areas (210), and the notch (240) is opened on the side wall of the second end (232) and extends toward the first end (231).

9. The adapter according to claim 8, characterized in that: The notch (240) extends between two adjacent reinforcing ribs (220).

10. A single cell, characterized in that: The invention comprises a pole group, a battery shell, a top cover and a conversion plate as claimed in any one of claims 1 to 9, wherein the pole group and the conversion plate are both arranged in the battery shell, the pole group comprises a core (11) and a pole ear (12), one end of the pole ear (12) is connected to the pole group, and the other end is connected to the pole ear connection area (210), the top cover comprises a top cover sheet (21) and a pole column (22), the top cover sheet (21) is covered at the opening of the battery shell, the pole column (22) is penetrated by the top cover sheet (21), and the pole column (22) is connected to the first connecting portion (100).

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