Connecting piece and battery assembly with same

Abstract

The utility model provides a connecting piece and a battery pack with the same, the connecting piece is applied to the battery pack, the battery pack comprises a first tab group and a second tab group, the first tab group and the second tab group are positioned on the same side of the battery pack, and the connecting piece comprises a body part used for being connected with a cover plate of the battery pack, the body part is positioned on the same side of the first tab group and the second tab group; the first tab connecting part and the second tab connecting part are arranged on the same side of the body part in the length direction, the first tab connecting part and the second tab connecting part are distributed at intervals in the length direction of the body part, and the first tab connecting part and the second tab connecting part are not located on the same plane in the thickness direction of the body part. According to the scheme, the problems that the length of the tab needs to be increased along with the increase of the thickness of the battery assembly in the prior art, the tab is easy to bend or break due to the overlong tab, and the performance of the battery is influenced can be solved.

Description

Technical Field

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

[0002] The battery assembly generally includes a stacked core component and a connector. The stacked core component includes a plurality of single cells stacked on each other. The single cells have tabs. The connector is used to connect the tabs of the plurality of single cells.

[0003] In the prior art, the tabs are arranged on the side of the single cell, and a plurality of single cells are stacked to form a core stack component. The tabs of the plurality of single cells are located on the same side of the core stack component, and the plurality of tabs are respectively close to and pressed together at half the thickness of the core stack component to form a tab group, one end of the connector is connected to the tab group, and the other end of the connector is connected to the cover plate of the battery assembly.

[0004] However, as the number of cells increases, the thickness of the core stack increases. To ensure the stability of the connection between the tab group and the connector, the length of the tab should continue to increase. However, if the length of the tab is too long, the tab is prone to bending or breaking during the production of the cell, affecting the performance of the cell. Utility Model Content

[0005] The utility model provides a connector and a battery assembly having the same, so as to solve the problem in the prior art that a plurality of pole ears of a battery assembly are respectively close to and pressed together at half the thickness of the battery assembly, and as the thickness of the battery assembly increases, the length of the pole ears needs to be adaptively increased to ensure the effective contact area between the pole ears and the connector, and the increase in the length of the pole ears makes it easy for the pole ears to bend or break, thereby affecting the performance of the battery.

[0006] According to one aspect of the utility model, a connector is provided, which is applied to a battery assembly, the battery assembly comprising a first pole lug group and a second pole lug group, the first pole lug group and the second pole lug group being located on the same side of the battery assembly, the connector comprising: a main body portion, which is used to connect to a cover plate of the battery assembly, the main body portion being located on the same side of the first pole lug group and the second pole lug group; a first pole lug connecting portion and a second pole lug connecting portion, which are arranged on the same side of the length direction of the main body portion, along the length direction of the main body portion, the first pole lug connecting portion and the second pole lug connecting portion are spaced apart, and along the thickness direction of the main body portion, the first pole lug connecting portion and the second pole lug connecting portion are not on the same plane.

[0007] Furthermore, the main body portion includes: a transition portion, the length direction of the transition portion is the same as the width direction of the battery assembly, and the first pole lug connection portion and the second pole lug connection portion are respectively arranged on the same side of the transition portion; a conduit portion, which is arranged on a side of the transition portion away from the first pole lug connection portion and the second pole lug connection portion, and the conduit portion is used to connect to the cover plate of the battery assembly.

[0008] Furthermore, the first pole tab connection portion and the second pole tab connection portion are respectively sheet-shaped structures, and the first pole tab connection portion and the second pole tab connection portion are respectively parallel to the battery assembly.

[0009] Furthermore, the transition portion is a sheet-like structure, and the first pole tab connecting portion and the second pole tab connecting portion are respectively perpendicular to the transition portion.

[0010] Furthermore, the confluence portion is a sheet-like structure, and the confluence portion is parallel to the first pole tab connecting portion and the second pole tab connecting portion respectively.

[0011] Furthermore, the connecting piece is formed by stamping a plate.

[0012] Furthermore, the thickness of the connecting piece is 0.5 mm-3 mm.

[0013] Furthermore, the first pole lug connection portion, the converging portion and the second pole lug connection portion are sequentially distributed along the length direction of the transition portion.

[0014] According to another aspect of the utility model, a battery assembly is provided, which includes: a first core stack component, including a plurality of first single cells stacked on each other, the first single cells having a first pole lug, and along the thickness direction of the first core stack component, the plurality of first pole lugs abut against each other to form a first pole lug group; a second core stack component, including a plurality of second single cells stacked on each other, the second single cells having a second pole lug, and along the thickness direction of the second core stack component, the plurality of second pole lugs abut against each other to form a second pole lug group, the second core stack component and the first core stack component are stacked on each other, the second pole lug has the same polarity as the first pole lug, the first pole lug group and the second pole lug group are respectively located on the same side of the battery assembly, and along the thickness direction of the battery assembly, the first pole lug group and the second pole lug group are not in the same plane; the above-mentioned connector, the first pole lug connecting portion of the connector is connected to the first pole lug group, and the second pole lug connecting portion of the connector is connected to the second pole lug group.

[0015] Furthermore, the first pole tab connection portion is welded to the first pole tab group, and the second pole tab connection portion is welded to the second pole tab group.

[0016] The technical solution of the utility model is applied, and the battery assembly includes a first tab group and a second tab group, and the connector is located on the same side of the first tab group and the second tab group. Along the length direction of the connector, the first tab connection portion and the second tab connection portion are spaced apart, and along the thickness direction of the battery assembly, the first tab group and the second tab group are spaced apart. The first tab group and the second tab group of the corresponding battery assembly correspond to the positions of the first tab connection portion and the second tab connection portion, that is, the first tab group and the second tab group are staggered, and the first tab group and the second tab group are connected to the first tab connection portion and the second tab connection portion, respectively. In the traditional technical solution, along the thickness direction of the battery assembly, a plurality of tabs are stacked toward the center of the thickness direction of the battery assembly to form a tab group. Under the premise that the thickness of the battery assembly is the same, in order to ensure the stability of the connection between the connector and the tab group, in the traditional technical solution, a plurality of tabs of the battery assembly are stacked to form a tab group, and the length of the tab needs to be adaptively increased, but the increase in the length of the tab will affect the structural strength of the tab, and the tab is prone to bending. In this solution, the thickness of the first tab group and the thickness of the second tab group are respectively smaller than the thickness of the tab group in the conventional technical solution, and the length of the tab is smaller than the length of the tab in the prior art. Compared with the conventional technical solution, the arrangement of this solution can reduce the length of the tab, improve the structural strength of the tab, and reduce the bending or damage of the tab while ensuring the stability of the connection between the tab group and the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a connecting piece provided by an embodiment of the utility model is shown;

[0019] Figure 2 A schematic diagram of the structure of a battery assembly provided by an embodiment of the utility model is shown;

[0020] Figure 3 show cold Figure 2 Schematic diagram of the local structure in;

[0021] Figure 4 A front view of a battery assembly provided by an embodiment of the utility model is shown;

[0022] Figure 5 Shows Figure 4 Schematic diagram of the local structure in;

[0023] Figure 6 A top view of the local structure of a battery assembly provided in an embodiment of the utility model is shown.

[0024] The above drawings include the following reference numerals:

[0025] 01, first pole lug group; 02, second pole lug group;

[0026] 10. Body part;

[0027] 11. Transfer unit;

[0028] 12. Confluence;

[0029] 21. a first pole lug connection portion; 22. a second pole lug connection portion;

[0030] 31. A first core stack component; 32. A second core stack component. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figures 1 to 6 As shown, an embodiment of the utility model provides a connector, which is applied to a battery assembly, the battery assembly includes a first pole lug group 01 and a second pole lug group 02, the first pole lug group 01 and the second pole lug group 02 are located on the same side of the battery assembly, and the connector includes a body portion 10, a first pole lug connecting portion 21 and a second pole lug connecting portion 22. The body portion 10 is used to connect with the cover plate of the battery assembly, and the body portion 10 is located on the same side of the first pole lug group 01 and the second pole lug group 02; the first pole lug connecting portion 21 and the second pole lug connecting portion 22 are arranged on the same side of the length direction of the body portion 10, along the length direction of the body portion 10, the first pole lug connecting portion 21 and the second pole lug connecting portion 22 are spaced apart, and along the thickness direction of the body portion 10, the first pole lug connecting portion 21 and the second pole lug connecting portion 22 are not on the same plane.

[0033] Applying the technical solution of the utility model, the battery assembly includes a first pole lug group 01 and a second pole lug group 02, and the connector is located on the same side of the first pole lug group 01 and the second pole lug group 02. Along the length direction of the connector, the first pole lug connection portion 21 and the second pole lug connection portion 22 are spaced apart, and along the thickness direction of the battery assembly, the first pole lug connection portion 21 and the second pole lug connection portion 22 are spaced apart. The first pole lug group 01 and the second pole lug group 02 of the corresponding battery assembly correspond to the positions of the first pole lug connection portion 21 and the second pole lug connection portion 22, that is, the first pole lug group 01 and the second pole lug group 02 are staggered, and the first pole lug group 01 and the second pole lug group 02 are connected to the first pole lug connection portion 21 and the second pole lug connection portion 22, respectively. In the traditional technical solution, along the thickness direction of the battery assembly, a plurality of pole lugs are stacked toward the center of the thickness direction of the battery assembly and form a pole lug group. Under the premise that the thickness of the battery assembly is the same, in order to ensure the stability of the connection between the connector and the tab group, in the traditional technical solution, multiple tabs of the battery assembly are stacked to form a tab group, and the length of the tab needs to be adaptively increased. However, the increase in the length of the tab will affect the structural strength of the tab, and the tab is prone to bending. In this solution, the thickness of the first tab group 01 and the thickness of the second tab group 02 are respectively smaller than the thickness of the tab group in the traditional technical solution, and the length of the tab is smaller than the length of the tab in the prior art. Compared with the traditional technical solution, the setting of this solution can reduce the length of the tab, improve the structural strength of the tab, and reduce the bending or damage of the tab, while ensuring the stability of the connection between the tab group and the connector.

[0034] like Figures 1 to 3 As shown, in the embodiment of the present scheme, the main body 10 includes an adapter 11 and a conduit 12. The length direction of the adapter 11 is the same as the width direction of the battery assembly, and the first pole lug connection portion 21 and the second pole lug connection portion 22 are respectively arranged on the same side of the adapter 11. The conduit 12 is arranged on a side of the adapter 11 away from the first pole lug connection portion 21 and the second pole lug connection portion 22, and the conduit 12 is used to connect to the cover plate of the battery assembly. With such an arrangement, when assembling the battery assembly, the conduit 12 is located on the side of the adapter 11 away from the battery assembly, which facilitates the connection between the conduit 12 and the cover plate.

[0035] The embodiment of the present solution does not limit the specific shapes of the first tab connection portion 21 and the second tab connection portion 22. The first tab connection portion 21 and the second tab connection portion 22 can be configured in the form of a strip structure or a block structure.

[0036] In the embodiment of the present solution, the first pole tab connection portion 21 and the second pole tab connection portion 22 are respectively sheet-like structures, and the first pole tab connection portion 21 and the second pole tab connection portion 22 are respectively parallel to the battery assembly. In this way, the first pole tab connection portion 21 and the first pole tab group 01 are parallel to each other, ensuring the contact area between the first pole tab connection portion 21 and the first pole tab group 01, and improving the stability of the connection between the first pole tab connection portion 21 and the first pole tab group 01. Similarly, the second pole tab connection portion 22 and the second pole tab group 02 are parallel to each other, ensuring the contact area between the second pole tab connection portion 22 and the second pole tab group 02, and improving the stability of the connection between the second pole tab connection portion 22 and the second pole tab group 02.

[0037] The present solution does not limit the specific shape of the adapter 11, which may be a block structure or a strip structure.

[0038] In the embodiment of the present solution, the adapter 11 is a sheet structure, and the first pole tab connection portion 21 and the second pole tab connection portion 22 are respectively perpendicular to the adapter 11. The sheet structure is set, and its cost is relatively low. In the embodiment of the present solution, the first pole tab connection portion 21 and the second pole tab connection portion 22 are respectively connected to the adapter 11 as a whole. Such a setting can improve the stability of the connection between the first pole tab connection portion 21 and the adapter 11, and improve the stability of the connection between the second pole tab connection portion 22 and the adapter 11.

[0039] The present solution does not limit the specific shape of the confluence portion 12, which may be a block structure or a strip structure.

[0040] In the embodiment of this solution, the confluence part 12 is a sheet structure, and the confluence part 12 is parallel to the first pole tab connection part 21 and the second pole tab connection part 22. Such an arrangement can improve the stability and convenience of the connection between the confluence part 12 and the cover plate.

[0041] Furthermore, the confluence portion 12 is integrally connected to the adapter portion 11. This arrangement can improve the stability of the connection between the confluence portion 12 and the adapter portion 11.

[0042] Specifically, the connecting piece is formed by stamping a plate, which is convenient for processing and forming the connecting piece and improves the structural strength of the connecting piece.

[0043] Furthermore, the first tab connection portion 21, the confluence portion 12 and the second tab connection portion 22 are sequentially distributed along the length direction of the adapter portion 11. Such a configuration can improve the convenience of connecting the adapter with the tab assembly and the cover plate of the battery assembly, and avoid interference between the components.

[0044] In this solution, the thickness of the connector is 0.5 mm to 3 mm. This arrangement enables the connector to have good mechanical properties and processing properties. The thickness of the connector can be set to 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm or 3 mm.

[0045] In the embodiment of the present scheme, the blank of the connector includes a plate body of a planar structure, the plate body includes a main plate, a first bending section, a second bending section and a third bending section, and the main plate, the first bending section, the second bending section and the third bending section are respectively roughly rectangular sheet structures. The first bending section and the second bending section are both arranged on one of the sides in the length direction of the main plate, and the first bending section and the second bending section are respectively arranged at the two ends of the main plate; the third bending section is arranged on the other side in the length direction of the main plate, and the third bending section is close to the middle position in the length direction of the main plate. During the bending process, the first bending section and the second bending section are bent in the same direction until the first bending section and the second bending section are respectively perpendicular to the plate body, the first bending section forms the first pole ear connection portion 21, and the second bending section forms the second pole ear connection portion 22; the third bending section is bent toward a side away from the first bending section and the second bending section, until the third bending section is perpendicular to the plate body, and the third bending section forms the confluence portion 12.

[0046] Furthermore, the two ends of the plate body in the length direction can also be set to an arc structure. In this way, the ends of the adapter part 11 in the length direction form an arc structure, reducing the possibility of bending of the ends of the adapter part 11 in the length direction and improving the structural stability of the connecting part.

[0047] like Figures 2 to 6 As shown, the embodiment of the utility model further provides a battery assembly, which includes a first core stack component 31, a second core stack component 32 and a connector of the above embodiment. The first core stack component 31 includes a plurality of first cells stacked on each other, the first cells having a first tab, and along the thickness direction of the first core stack component 31, the plurality of first tabs abut against each other to form a first tab group 01. The second core stack component 32 includes a plurality of second cells stacked on each other, the second cells having a second tab, and along the thickness direction of the second core stack component 32, the plurality of second tabs abut against each other to form a second tab group 02, the second core stack component 32 and the first core stack component 31 are stacked on each other, the first tab group 01 and the second tab group 02 are respectively located on the same side of the battery assembly, and along the thickness direction of the battery assembly, the first tab group 01 and the second tab group 02 are not in the same plane; the first tab connection portion 21 of the connector is connected to the first tab group 01, and the second tab connection portion 22 of the connector is connected to the second tab group 02.

[0048] In the embodiment of this solution, the first electrode tab connection portion 21 is welded to the first electrode tab group 01 , and the second electrode tab connection portion 22 is welded to the second electrode tab group 02 .

[0049] like Figure 5 As shown, specifically, the first pole tab group 01 is located on a side of the first pole tab connection portion 21 close to the second pole tab connection portion 22, and such a configuration can facilitate the welding of the first pole tab connection portion 21 and the first pole tab group 01. Similarly, the second pole tab group 02 is located on a side of the second pole tab connection portion 22 close to the first pole tab connection portion 21, and such a configuration can facilitate the welding of the second pole tab connection portion 22 and the second pole tab group 02.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0053] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0054] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0055] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A connecting piece, characterized in that: Applied to a battery assembly, the battery assembly comprises a first pole lug group (01) and a second pole lug group (02), the first pole lug group (01) and the second pole lug group (02) are located on the same side of the battery assembly, and the connecting member comprises: A body portion (10) used for connecting to a cover plate of the battery assembly, the body portion (10) being located on the same side of the first electrode tab group (01) and the second electrode tab group (02); The first pole lug connection portion (21) and the second pole lug connection portion (22) are arranged on the same side of the length direction of the main body (10); along the length direction of the main body (10), the first pole lug connection portion (21) and the second pole lug connection portion (22) are spaced apart; along the thickness direction of the main body (10), the first pole lug connection portion (21) and the second pole lug connection portion (22) are not on the same plane.

2. The connecting piece according to claim 1, characterized in that: The main body (10) comprises: A transition portion (11), wherein the length direction of the transition portion (11) is the same as the width direction of the battery assembly, and the first pole lug connecting portion (21) and the second pole lug connecting portion (22) are respectively arranged on the same side of the transition portion (11); A confluence portion (12) is arranged on a side of the transition portion (11) away from the first pole lug connection portion (21) and the second pole lug connection portion (22), and the confluence portion (12) is used to be connected to a cover plate of the battery assembly.

3. The connecting piece according to claim 2, characterized in that: The first pole tab connection portion (21) and the second pole tab connection portion (22) are respectively sheet-shaped structures, and the first pole tab connection portion (21) and the second pole tab connection portion (22) are respectively parallel to the battery assembly.

4. The connecting piece according to claim 3, characterized in that: The transition portion (11) is a sheet-like structure, and the first pole tab connection portion (21) and the second pole tab connection portion (22) are respectively perpendicular to the transition portion (11).

5. The connecting piece according to claim 3, characterized in that: The confluence portion (12) is a sheet-like structure, and the confluence portion (12) is parallel to the first pole tab connection portion (21) and the second pole tab connection portion (22), respectively.

6. The connecting piece according to any one of claims 3 to 5, characterized in that: The connecting piece is formed by stamping a plate.

7. The connecting piece according to claim 6, characterized in that: The thickness of the connecting piece is 0.5mm-3mm.

8. The connecting piece according to claim 2, characterized in that: The first pole lug connection portion (21), the converging portion (12) and the second pole lug connection portion (22) are sequentially distributed along the length direction of the transition portion (11).

9. A battery assembly, characterized in that: The battery assembly comprises: A first core stack component (31) comprises a plurality of first single cells stacked on each other, wherein the first single cells have first pole tabs, and along the thickness direction of the first core stack component (31), the plurality of first pole tabs abut against each other to form a first pole tab group (01); The second core stack component (32) comprises a plurality of second single cells stacked on each other, the second single cells having second pole tabs, along the thickness direction of the second core stack component (32), the plurality of second pole tabs abut against each other to form a second pole tab group (02), the second core stack component (32) and the first core stack component (31) are stacked on each other, the second pole tab and the first pole tab have the same polarity, the first pole tab group (01) and the second pole tab group (02) are respectively located on the same side of the battery assembly, and along the thickness direction of the battery assembly, the first pole tab group (01) and the second pole tab group (02) are not in the same plane; The connector according to any one of claims 1 to 8, wherein the first tab connection portion (21) of the connector is connected to the first tab group (01), and the second tab connection portion (22) of the connector is connected to the second tab group (02).

10. The battery assembly according to claim 9, characterized in that: The first pole tab connection portion (21) is welded to the first pole tab group (01), and the second pole tab connection portion (22) is welded to the second pole tab group (02).

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