Connection assembly, battery device and electrical consumer

Abstract

The utility model discloses a connecting assembly, battery device and electrical equipment, connecting assembly includes: first support, connecting piece, connecting piece with first support cooperation and bending, to make the connecting piece for the sandwich of the polar lug after the first support is threaded, utilize the sandwich structure of connecting piece - polar lug - connecting piece that connecting piece is bent to form, can guarantee both surface contact fully, and then improve the welding yield.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a connection component, a battery device, and an electrical device. Background Technology

[0002] With the development of new energy vehicles, battery research is receiving increasing attention. One crucial aspect is the connection between the battery cell's tabs and the cover plate, which requires a connecting piece. Specifically, one side of the tab in the battery cell is attached to the surface of the connecting piece, and then ultrasonic welding is performed to complete the ultrasonic welding between the tab and the connecting piece.

[0003] In related technologies, a fixing bracket is installed to position and assemble the connecting piece, ensuring that the connecting piece is welded to the electrode tab. However, during welding, the electrode tab may not be able to fully fit with the connecting piece, reducing the welding yield. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a connecting assembly that utilizes a bent connecting piece to form a sandwich structure of connecting piece-tab-connecting piece, ensuring full surface contact between the two and thus improving the welding yield.

[0005] This utility model further proposes a battery device.

[0006] This utility model further proposes an electrical device.

[0007] A connecting assembly according to a first aspect of the present invention includes: a first bracket; and a connecting piece, wherein the connecting piece cooperates with the first bracket and is bent so that the bent connecting piece is used to clamp an electrode tab that passes through the first bracket.

[0008] According to the connecting assembly of this utility model embodiment, the connecting piece is bent to form a sandwich structure of connecting piece-tab-connecting piece, which fully ensures the surface contact of the two and thus improves the welding yield.

[0009] According to some embodiments of the present invention, the connecting piece moves along one side of the first bracket perpendicular to the direction in which the electrode tab is inserted, so as to cooperate with and bend the first bracket.

[0010] According to some embodiments of the present invention, the connecting piece moves along a first direction perpendicular to the electrode insertion direction to cooperate with the first bracket, and the connecting piece is partially bent in the first direction.

[0011] According to some embodiments of the present invention, the first bracket has n spaced electrode holes along a second direction perpendicular to the electrode hole insertion direction and the electrode holes extend along a first direction; wherein, n is a positive integer and n≥2, and the first direction and the second direction are perpendicular to each other.

[0012] According to some embodiments of the present invention, the connecting piece has opposite first notches formed on both sides along the first direction, the first notches extending along the first direction, the opposite first notches being a pair, and the connecting piece having m pairs corresponding to n electrode tab holes along the first direction; m=n-1.

[0013] According to some embodiments of the present invention, a positioning part and / or a limiting part are provided on one side of the first bracket perpendicular to the electrode tab insertion direction. When the connecting piece moves along the first direction, it is positioned and engaged with the positioning part, and when the connecting piece moves to the limit position, it abuts and engages with the limiting part.

[0014] According to some embodiments of the present invention, the connecting piece has opposing second notches formed on both sides along the first direction, the second notches extending along the first direction and cooperating with the positioning part and / or limiting part.

[0015] According to some embodiments of the present invention, a groove and a positioning post are provided on one side of the first bracket perpendicular to the electrode insertion direction along one side of the first direction. The positioning post is provided at one end of the groove facing the connecting piece. The groove forms the limiting part, and the positioning post forms the positioning part.

[0016] According to some embodiments of the present invention, a guide portion is formed on one side of the first bracket perpendicular to the electrode insertion direction along one side of the second direction to guide and cooperate with the edge of the connecting piece.

[0017] According to some embodiments of the present invention, the connecting assembly further includes a second bracket, which is disposed on the outside of the bent portion of the connecting piece and fixedly connected to the first bracket.

[0018] According to some embodiments of the present invention, the second bracket includes: a rib portion and a connecting rod portion, wherein the rib portion includes at least two ribs, one end of the at least two ribs is connected to the connecting rod portion and the connecting rod portion is fixedly connected to the first bracket, and the other end of the at least two ribs is fixedly connected to the first bracket; wherein the ribs are adapted to avoid the welding area between the connecting piece and the electrode tab.

[0019] According to some embodiments of the present invention, the first bracket is provided with a first slot and a first protrusion on opposite sides of one side perpendicular to the direction of the electrode tab, the connecting rod is provided with a second slot, one end of at least two of the ribs is engaged in the first slot, and the connecting rod is engaged in the first protrusion through the second slot.

[0020] According to some embodiments of the present invention, the connecting piece is provided with a deformable portion, which forms a virtual pivot when the connecting piece is bent.

[0021] According to some embodiments of the present invention, the deformable portion is located in the middle of the connecting piece so that the two parts formed after the connecting piece is bent completely overlap.

[0022] According to some embodiments of the present invention, the area of ​​the connecting piece used to clamp the electrode tab is formed with a welding distance measuring hole for observing the contact state between the electrode tab and the connecting piece.

[0023] The battery device according to a second aspect of the present invention includes the aforementioned connecting component.

[0024] The electrical equipment according to a third aspect of the present invention includes the aforementioned connection component.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a diagram showing the unfolded state of the connecting piece when the first bracket and the connecting piece are engaged according to an embodiment of the present utility model;

[0028] Figure 2 This is a diagram showing the bending state of the connecting piece when the first bracket and the connecting piece are engaged according to an embodiment of the present utility model;

[0029] Figure 3 This is an assembly diagram of the second bracket and the first connection according to an embodiment of the present utility model;

[0030] Figure 4 This is an assembly diagram of the second bracket, the first bracket, and the connecting piece according to an embodiment of the present utility model.

[0031] Figure label:

[0032] 1. First support; 11. Electrode perforation; 12. Positioning part; 13. Limiting part; 14. Guide part; 15. First slot; 2. Connecting piece; 21. First notch; 22. Second notch; 23. Deformation part; 24. Welding distance measuring hole; 3. Second support; 31. Rib part; 3101. Rib; 32. Connecting rod part; 3201. Second slot; 200. Electrode. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0034] The following is for reference. Figures 1-4 A connection component according to an embodiment of the present utility model is described.

[0035] like Figures 1-4 As shown, the connecting assembly includes a first bracket 1 and a connecting piece 2. The connecting piece 2 cooperates with the first bracket 1 and is bent so that the bent connecting piece 2 is used to clamp the tab 200 that passes through the first bracket 1.

[0036] Specifically, after the connecting piece 2 is engaged with the first bracket 1 and positioned appropriately, the electrode tab 200, which passes through the first bracket 1, is placed on the surface of the connecting piece 2. The connecting piece 2 is then bent to clamp the electrode tab 200 within it, forming a sandwich structure of connecting piece 2-electrode tab 200-connecting piece 2. Alternatively, the electrode tab 200 can be inserted through the first bracket 1 and then adhered to its surface. The connecting piece 2 is then engaged with the first bracket 1, allowing it to be smoothly inserted into the gap between the electrode tab 200 and the first bracket 1. Once in the appropriate position, the connecting piece 2 is bent to clamp the electrode tab 200 within it. See [link to details]. Figure 1 As shown, the initial state of connecting piece 2 is an unfolded long piece. Figure 2 The image shows the bent connecting piece 2.

[0037] This configuration, by bending the connecting piece 2 to form a double-layer connecting piece 2 to clamp the tab 200, ensures full contact between the surfaces of the connecting piece 2 and the tab 200, thereby effectively improving welding yield, increasing production cycle time, and reducing costs. Compared to existing technologies where the connecting piece 2 merely serves as a connecting carrier between battery cells, the connecting assembly of this invention, while retaining its original function, adds a constraint function for the tab 200. During welding, the pressure head directly presses down on the connecting piece 2. The sandwich structure of connecting piece 2-tab 200-connecting piece 2 ensures full surface contact between the two, avoiding welding defects such as welding gaps and incomplete welds.

[0038] Therefore, the connecting component of this utility model can fully ensure the surface contact of the two through the sandwich structure of connecting piece 2-tab 200-connecting piece 2, thereby effectively improving the welding yield, increasing the production cycle, and reducing costs.

[0039] According to some embodiments of the present invention, the connecting piece 2 moves along one side of the first bracket 1 perpendicular to the direction in which the electrode tab 200 is inserted, so as to cooperate with the first bracket 1 and bend.

[0040] See details Figure 1 and Figure 2 As shown, the connecting piece 2 moves along the surface of the first bracket 1 extending from the tab 200, that is, the connecting piece 2 moves horizontally along the surface of the first bracket 1 to engage with and bend with the first bracket 1. Thus, compared to the connecting piece 2 moving towards the first bracket 1 in a direction perpendicular to the surface of the first bracket 1 (i.e., snap-fit ​​installation) to engage with the first bracket 1, the connecting piece 2 in this embodiment adopts a pull-out installation, which is more conducive to automated operation on the production line.

[0041] Furthermore, the connecting piece 2 moves along a first direction perpendicular to the insertion direction of the tab 200 to engage with the first bracket 1, and the portion of the connecting piece 2 in the first direction is bent.

[0042] See details Figure 1 and Figure 2 As shown, the connecting piece 2 extends from the first support 1 along the first direction and moves to engage with the first support 1 on one side surface of the tab 200. When the connecting piece 2 reaches a suitable position, a portion of the connecting piece 2 is bent along the first direction, forming a deformable portion 23 extending perpendicular to the first direction on the connecting piece 2, thereby clamping the tab 200 between the two portions formed after the connecting piece 2 is bent. This configuration, where the connecting piece 2 moves to engage with the first support 1 along the first direction and the portion of the connecting piece 2 is bent along the first direction, further facilitates automated operation on the production line.

[0043] According to some embodiments of the present invention, the first support 1 has n spaced electrode through holes 11 along a second direction perpendicular to the electrode tab 200 insertion direction, and the electrode through holes 11 extend along a first direction. Wherein, n is a positive integer and n≥2, and the first and second directions are perpendicular to each other.

[0044] In other words, the first support 1 has n spaced tab through holes 11, which are arranged at intervals along a second direction perpendicular to the tab 200 insertion direction and extend along a first direction. With this arrangement, the n tabs 200 pass through the first support 1 via corresponding tab through holes 11 and then come into contact with each other via at least one connecting piece 2 for welding. In this example, the first support 1 has two tab through holes 11. The two tabs 200 pass through their respective tab through holes 11 and are placed on the surface of the connecting piece 2. Electrical connection between the two tabs 200 is achieved by welding each tab 200 to the connecting piece 2.

[0045] According to some embodiments of the present invention, the connecting piece 2 has opposite first notches 21 formed on both sides along the first direction. The first notches 21 extend along the first direction and the opposite first notches 21 are a pair. Furthermore, the connecting piece 2 has m pairs of holes corresponding to n tab holes 11 along the first direction, where m = n - 1.

[0046] In other words, the connecting piece 2 has opposing first notches 21 formed on both sides along the first direction to allow the tabs 200 to pass through. Since the connecting piece 2 allows n tabs 200 to pass through, n-1 pairs of first notches 21 need to be made. In this example, the first support 1 has two tab through holes 11, and correspondingly, the connecting piece 2 has a pair of first notches 21 to ensure that the tabs 200 pass through the connecting piece 2.

[0047] According to some embodiments of the present invention, a positioning part 12 and / or a limiting part 13 are provided on one side of the first bracket 1 perpendicular to the insertion direction of the electrode tab 200. When the connecting piece 2 moves along the first direction, it is positioned and engaged with the positioning part 12, and when the connecting piece 2 moves to the limit position, it abuts and engages with the limiting part 13.

[0048] With this configuration, when the connecting piece 2 moves and engages with the first bracket 1 along one side of the first bracket 1 extending from the tab 200 in a first direction, the positioning part 12 on the first bracket 1 can position the connecting piece 2 to prevent it from deviating, allowing it to engage smoothly and quickly with the first bracket 1. Furthermore, when the connecting piece 2 moves to the appropriate position, the limiting part 13 abuts against the connecting piece 2, ensuring that the connecting piece 2 cannot move further.

[0049] According to some embodiments of the present invention, the connecting piece 2 has opposing second notches 22 formed on both sides along the first direction. The second notches 22 extend along the first direction and cooperate with the positioning part 12 and / or the limiting part 13.

[0050] See details Figure 1 , Figure 2 and Figure 4As shown, when the connecting piece 2 moves and engages with the first bracket 1 along the first direction of one side of the first bracket 1 extending from the tab 200, it engages with the positioning part 12 and the limiting part 13 through the second notch 22, thereby achieving positioning and limiting engagement of the connecting piece 2.

[0051] In this example, the first notch 21 and the second notch 22 can be the same notch, so that they can share the same function.

[0052] According to one embodiment of the present invention, a groove and a positioning post are provided on one side of the first bracket 1 perpendicular to the insertion direction of the electrode tab 200 along the first direction. The positioning post is provided at one end of the groove facing the connecting piece 2. The groove forms a limiting part 13 and the positioning post forms a positioning part 12.

[0053] See details Figure 1 , Figure 2 and Figure 4 As shown, the first bracket 1 is provided with a groove and a positioning post on one side along the first direction. The connecting piece 2 moves from the other side of the first bracket 1 along the first direction toward the positioning post and the groove. The connecting piece 2 is first positioned by the positioning post, and then moved to the appropriate position and is limited by the groove.

[0054] According to some embodiments of the present invention, a guide portion 14 is formed on one side of the first bracket 1 perpendicular to the insertion direction of the electrode tab 200 along one side of the second direction to guide and cooperate with the edge of the connecting piece 2.

[0055] See details Figure 1 , Figure 2 and Figure 4 As shown, the first support 1 has a long rib formed on one side along the second direction to form a guide part 14, so that the side moves along the long rib when the connecting piece 2 moves along the first direction.

[0056] According to some embodiments of the present invention, the connecting assembly further includes a second bracket 3, which is disposed on the outer side of the bent portion of the connecting piece 2 and is fixedly connected to the first bracket 1.

[0057] See details Figure 3 and Figure 4 As shown, the second bracket 3 is arranged on the outside of the bent part of the connecting piece 2. By fixing the connecting piece 2 with the first bracket 1, it achieves the purpose of fixing the connecting piece 2, thereby pressing the connecting piece 2 and the electrode 200 together to ensure zero gap between the connecting piece 2 and the electrode 200, thus ensuring welding yield.

[0058] According to some embodiments of the present invention, the second support 3 includes a rib portion 31 and a connecting rod portion 32. The rib portion 31 includes at least two ribs 3101, one end of which is connected to the connecting rod portion 32, and the connecting rod portion 32 is fixedly connected to the first support 1. The other end of the at least two ribs 3101 is fixedly connected to the first support 1. The ribs 3101 (rib portion 31) are adapted to avoid the welding area between the connecting piece 2 and the electrode tab 200.

[0059] See details Figure 3 and Figure 4 As shown, at least two ribs 3101 extend along a first direction and are spaced apart along a second direction. One end of each rib 3101 is connected to a connecting rod portion 32, thus fixing one end of the connecting rod portion 32 to one side of the first bracket 1, and fixing the other end of each rib 3101 to the opposite side of the first bracket 1. Alternatively, both ends of each rib 3101 are connected to the connecting rod portion 32, fixing the connecting rod portion 32 to the opposite sides of the first bracket 1. It should be noted that the at least two ribs 3101 (rib portions 31) are adapted to avoid the welding area between the connecting piece 2 and the electrode tab 200.

[0060] Therefore, compared with the existing technology which cannot guarantee that the tab 200 fits tightly against the connecting piece 2, this embodiment further adds a second bracket 3 to fix the tab 200 and the connecting piece 2. Before welding, the second bracket 3 needs to be installed to press the connecting piece 2 and the tab 200 together.

[0061] According to some embodiments of the present invention, the first bracket 1 has a first slot 15 and a first protrusion on opposite sides of one side perpendicular to the insertion direction of the electrode ear 200, the connecting rod part 32 has a second slot 3201, one end of at least two ribs 3101 is engaged in the first slot 15, and the connecting rod part 32 is engaged in the first protrusion through the second slot 3201.

[0062] See details Figure 3 and Figure 4 As shown, the first bracket 1 has a first slot 15 and a first protrusion on one side of the pole ear 200 along the first direction. At least two ribs 3101 are locked in the first slot 15, and the second slot 3201 of the connecting rod 32 is locked in the first protrusion, so as to realize the locking connection between the second bracket 3 and the first bracket 1.

[0063] According to some embodiments of the present invention, the connecting piece 2 is provided with a deformable part 23, which forms a virtual pivot when the connecting piece 2 is bent.

[0064] See details Figure 3 and Figure 4As shown, when the connecting piece 2 is bent, the deformable portion 23 forms a virtual axis of rotation, causing the connecting piece 2 to rotate around this virtual axis, thereby achieving the bending of the connecting piece 2. Here, the virtual axis of rotation refers to the fact that when the connecting piece 2 is subjected to force, it can be considered to rotate around a virtual axis. This virtual axis of rotation is formed by the deformable portion 23 of the connecting piece 2 through deformation. When the deformable portion 23 is subjected to force, it deforms to form the virtual axis of rotation for the connecting piece 2. When the force disappears, the deformable portion 23 can return to its original shape. Furthermore, the thickness of the deformable portion 23 is smaller than the thickness of the connecting piece 2, which facilitates bending. The bending can be guided by thinning the bending portion of the connecting piece 2.

[0065] According to some embodiments of this utility model, the deformable part 23 is located in the middle of the connecting piece 2, so that the two parts formed after the connecting piece 2 is bent completely overlap. In this way, the electrode tab 200 can be clamped with the largest possible area, while ensuring the largest possible welding area. Of course, the deformable part 23 may not be located in the middle of the connecting piece 2, as long as the two parts formed after the connecting piece 2 is bent can clamp the electrode tab 200, and the overlapping area of ​​the two parts formed after bending can meet the area requirements of the welding area.

[0066] According to some embodiments of this utility model, a welding distance measuring hole 24 is formed in the area of ​​the connecting piece 2 used to clamp the electrode tab 200, for observing the contact state between the electrode tab 200 and the connecting piece 2. Thus, during welding, the contact state between the electrode tab 200 and the connecting piece 2 can be observed at any time through the welding distance measuring hole 24, thereby ensuring that the two can be tightly welded together.

[0067] The battery device according to a second aspect of the present invention includes a connecting component.

[0068] The electrical equipment according to a third aspect of the present invention includes a connecting component.

[0069] Compared to existing technologies, the welding process of the tab 200 and the connecting piece 2 in this invention is different. Existing technologies directly weld the tab 200 to the connecting piece 2, while this invention employs a sandwich structure of connecting piece 2-tab 200-connecting piece 2. This ensures that the welding first contacts the connecting piece 2 and then welds to the tab 200. Furthermore, existing technologies lack a structure that forcibly restrains the tab 200. In this embodiment, the connecting piece 2 is fixed by the second bracket 3, and the pressure head directly presses against the connecting piece 2 during welding. Simultaneously, the contact state between the tab 200 and the connecting piece 2 can be observed at any time through the welding distance measuring hole 24. This ensures that the sandwich structure of connecting piece 2-tab 200-connecting piece 2 guarantees sufficient surface contact between the two, thereby improving the welding yield and avoiding welding defects such as gaps and incomplete welds.

[0070] In the description of this utility model, it should be understood that 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0072] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A connection component, characterized in that, include: A first support has a tab through hole for the tab to pass through; A connecting piece moves along one side of the first bracket perpendicular to the electrode tab insertion direction to cooperate with and bend the first bracket so that the bent connecting piece is used to clamp the electrode tab after it passes through the first bracket.

2. The connection component according to claim 1, characterized in that, The connecting piece moves along a first direction perpendicular to the electrode insertion direction to cooperate with the first bracket, and the connecting piece is partially bent in the first direction.

3. The connection component according to claim 2, characterized in that, The first bracket has n spaced electrode holes along a second direction perpendicular to the electrode hole insertion direction, and the electrode holes extend along a first direction; Where n is a positive integer and n≥2, the first direction and the second direction are perpendicular to each other.

4. The connecting component according to claim 3, characterized in that, The connecting piece has opposite first notches formed on both sides along the first direction. The first notches extend along the first direction. The opposite first notches are a pair, and m pairs are formed on the connecting piece to correspond to n electrode perforations along the first direction; m=n-1.

5. The connecting component according to claim 2, characterized in that, The first bracket has a positioning part and / or a limiting part on one side perpendicular to the electrode insertion direction. When the connecting piece moves along the first direction, it is positioned and engaged with the positioning part, and when the connecting piece moves to the limit position, it abuts and engages with the limiting part.

6. The connecting component according to claim 5, characterized in that, The connecting piece has opposing second notches formed on both sides along the first direction, and the second notches extend along the first direction and cooperate with the positioning part and / or limiting part.

7. The connecting component according to claim 5, characterized in that, The first bracket has a groove and a positioning post on one side of the side perpendicular to the electrode insertion direction along the first direction. The positioning post is located at the end of the groove facing the connecting piece. The groove forms the limiting part, and the positioning post forms the positioning part.

8. The connecting component according to claim 2, characterized in that, The first bracket has a guide portion formed on one side perpendicular to the electrode insertion direction along the second direction to guide and cooperate with the edge of the connecting piece.

9. The connection component according to claim 1, characterized in that, Also includes: The second bracket is disposed on the outside of the bent portion of the connecting piece and is fixedly connected to the first bracket.

10. The connection component according to claim 9, characterized in that, The second support includes a rib section and a connecting rod section. The rib section includes at least two ribs. One end of each of the at least two ribs is connected to the connecting rod section, and the connecting rod section is fixedly connected to the first support. The other end of each of the at least two ribs is fixedly connected to the first support. The ribs are adapted to avoid the welding area between the connecting piece and the electrode tab.

11. The connection component according to claim 10, characterized in that, The first bracket has a first slot and a first protrusion on opposite sides of one side perpendicular to the direction of the electrode tab. The connecting rod has a second slot. At least two ends of the ribs are engaged in the first slot, and the connecting rod is engaged in the first protrusion through the second slot.

12. The connection component according to claim 1, characterized in that, The connecting piece is provided with a deformable part, which forms a virtual pivot when the connecting piece is bent.

13. The connection component according to claim 12, characterized in that, The deformable portion is located in the middle of the connecting piece, so that the two parts formed after the connecting piece is bent completely overlap.

14. The connection component according to claim 1, characterized in that, The area of ​​the connecting piece used to clamp the electrode tab has a welding distance measuring hole for observing the contact state between the electrode tab and the connecting piece.

15. A battery device, characterized in that, Includes the connecting component as described in any one of claims 1-14.

16. An electrical appliance, characterized in that, Includes the connecting component as described in any one of claims 1-14.

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