Battery cell tab connecting device and battery cell assembly

Abstract

The invention relates to the technical field of batteries, in particular to a battery cell tab connecting device and a battery cell assembly. The battery cell tab connecting device comprises a base and an electric conductor, according to the battery cell tab connecting device, current transmission of a plurality of battery cells is realized through the electric conductor, and the base can effectively bear the electric conductor. During electric connection assembly, the battery cell tabs do not need to be bent, the battery cell tabs are directly and electrically connected with the over-current part, the assembly difficulty is reduced, the grouping process is simplified, the assembly efficiency is improved, after the battery cell tabs are electrically connected with the over-current part through surface contact, external current transmission is realized through the confluence surface of the confluence part in a unified manner, and the assembly efficiency is improved. Compared with a traditional design, the over-current area can be increased by about one time, and the over-current performance can be effectively improved.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and in particular to a cell tab connection device and a cell assembly. Background Technology

[0002] To solve the problem of high-voltage electrical connection in batteries, it is usually necessary to bend the tabs of the battery cell by 90° to make them fit against the surface of the copper busbar, thereby enabling electrical transmission. However, the space available for bending the tabs is small, the operation is difficult, and this increases the difficulty of assembly and manufacturing to some extent. Moreover, the assembled battery cell assembly is prone to insufficient current-carrying area when transmitting current, failing to meet the dual requirements of space arrangement and current-carrying area. Summary of the Invention

[0003] To address the aforementioned technical problems, this disclosure provides a battery cell tab connection device and a battery cell assembly.

[0004] In a first aspect, this disclosure provides a battery cell tab connection device, comprising: The base has multiple rows of sockets that are provided through it, and the multiple rows of sockets correspond to the battery cell tabs of multiple sets of battery cells so that the battery cell tabs can pass through. A conductor is disposed on the base. The conductor has a current-collecting portion and a plurality of current-passing portions. The plurality of current-passing portions are arranged at intervals along the cell stacking direction. The current-collecting portion has a current-collecting surface. The current-passing portion has a current-passing surface for electrical connection with the cell tab.

[0005] Optionally, the shape and size of the flow surface are adapted to the shape and size of the connected battery cell tabs.

[0006] Optionally, two conductors are provided, spaced apart on the base. One conductor is electrically connected to the positive electrode of a plurality of battery cell tabs, and the other conductor is electrically connected to the negative electrode of a plurality of battery cell tabs.

[0007] Optionally, two battery cell tab connection devices are provided, one of which is connected to the positive tab of the battery cell tab located at one end of the battery cell, and the other of which is connected to the negative tab of the battery cell tab located at one end of the battery cell.

[0008] Optionally, on the side away from the conductor, the base has a plurality of protrusions spaced apart along the stacking direction of the battery cells, and two adjacent protrusions form a limiting slot for the battery cell tab to be inserted, and each limiting slot is connected to the socket.

[0009] Optionally, the end of the protrusion facing away from the conductor abuts against the main body of the battery cell.

[0010] Optionally, a first limiting structure and a second limiting structure are respectively provided on opposite sides of the battery cell body, and the protrusion is sandwiched between the first limiting structure and the second limiting structure.

[0011] Optionally, the end of the socket opposite to the conductor has a guide slope.

[0012] Optionally, the base has a separator located between the two conductors to insulate the two conductors.

[0013] Secondly, a battery cell assembly is provided, including a plurality of battery cells and the aforementioned battery cell tab connection device, wherein the battery cell tabs of the plurality of battery cells are connected through the battery cell tab connection device.

[0014] The technical solution provided in this disclosure has the following advantages compared with the prior art: This battery cell tab connection device enables current transmission between multiple battery cells via a conductor, and the base effectively supports the conductor. During electrical assembly, the battery cell tabs do not need to be bent; they can be directly connected to the current-carrying section. This reduces assembly difficulty, simplifies the grouping process, and improves assembly efficiency. Furthermore, after the battery cell tabs achieve electrical connection with the current-carrying section through surface contact, the current is uniformly transmitted to the outside through the current-carrying surface of the busbar, effectively increasing the current-carrying area. Compared to traditional designs, its current-carrying area can be increased by approximately double, effectively improving current-carrying performance.

[0015] The battery cell assembly includes the aforementioned battery cell tab connection device, which has the same beneficial effects as the aforementioned battery cell tab connection device. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the battery cell tab connection device according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram of the battery cell tab connection device and the battery cell assembly according to the embodiments of this disclosure. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the base described in an embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of the conductor described in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the battery cell tab connection device and the battery cell assembly according to the embodiments of this disclosure. Figure 2 (The base is hidden); Figure 6 Schematic diagram of the battery cell tab structure as described in some embodiments Figure 1 ; Figure 7 Schematic diagram of the battery cell tab structure as described in some embodiments Figure 2 ; Figure 8 This is a schematic diagram of the battery cell tab connection device and the battery cell assembly according to the embodiments of this disclosure. Figure 3 ; Figure 9 for Figure 8 Schematic diagram of structural sectioning along the AA direction; Figure 10 for Figure 9 A magnified view of a portion of point A in the middle; Figure 11 This is a schematic diagram of the battery cell tab connection device and the battery cell assembly according to the embodiments of this disclosure. Figure 4 .

[0019] in: 1. Base; 11. Socket; 111. Guide slope; 12. Support body; 13. Divider; 14. Protrusion; 141. Arc portion; 15. Limiting slot; 2. Conductor; 21. Busbar; 211. Busbar surface; 22. Current-carrying part; 221. Current-carrying surface; 100. Battery cell; 101. Battery cell body; 1011. First limiting structure; 1012. Second limiting structure; 102, Cell tab; 1021, Positive tab; 1021a, First positive tab; 1021b, Second positive tab; 1022, Negative tab; 1022a, First negative tab; 1022b, Second negative tab. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0021] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0022] The battery cell tab connection device disclosed herein is as follows: Figure 1 and Figure 2 As shown, it is mainly used for connecting the cell tabs 102 of multiple sets of cells 100, and includes a base 1 and a conductor 2. The specific structure of the base 1 is as follows. Figure 3 As shown, multiple rows of insertion holes 11 are provided through it, and the multiple rows of insertion holes 11 correspond to the cell tabs 102 of multiple sets of battery cells 100, so that the cell tabs 102 can pass through. The structure of the conductor 2 is as follows. Figure 1 and Figure 4 As shown, it is disposed on the base 1. The conductor 2 has a current-collecting part 21 and a plurality of current-passing parts 22. The plurality of current-passing parts 22 are arranged at intervals along the stacking direction of the battery cells. The current-collecting part 21 has a current-collecting surface 211, which can be electrically connected to a busbar commonly used in the field for centralized current transmission, so as to realize the current collection and transmission between multiple sets of battery cells 100. The current-passing part 22 has a current-passing surface 221 for electrical connection with the battery cell tab 102.

[0023] During electrical assembly, the battery cell tab 102 itself does not need to be bent. It only needs to be inserted into the corresponding socket 11 and then directly electrically connected to the current-carrying surface 221 of the current-carrying part 22. This reduces assembly difficulty, simplifies the assembly process, and improves assembly efficiency. After the battery cell tab 102 achieves electrical connection with the current-carrying part 22 through surface contact, the current is uniformly transmitted to the outside through the current-carrying surface 211 of the current-carrying part 21. This effectively increases the current-carrying area. Compared with the traditional design, its current-carrying area can be increased by about 100%, which can effectively improve the current-carrying performance.

[0024] For example, the battery cell 100 in this embodiment can be a pouch battery cell. This embodiment uses three sets of battery cells 100 as an example to further explain the specific usage of the battery cell tab connection device. In other embodiments, the number of battery cells 100 can be two, four, five or more, and the number of current-passing parts 22 can also be adaptively changed and adjusted so that multiple current-passing parts 22 are arranged along the battery cell stacking direction. This embodiment only uses the case of three sets of battery cells 100 as an example, and does not mean that the battery cell tab connection device can only realize the electrical connection of three sets of battery cells 100.

[0025] Specifically, such as Figure 2 As shown, in this embodiment, the battery cell tab 102 of the battery cell 100 can be a single-sided tab: That is, the battery cell tab 102 includes a positive tab 1021 and a negative tab 1022 located at the same end of the battery cell body 101. Two conductors 2 are correspondingly provided in the battery cell tab connection device, spaced apart above the base 1. One conductor 2 is used for electrical connection to the positive tabs 1021 of the multiple battery cell tabs 102, and the other conductor 2 is used for electrical connection to the negative tabs 1022 of the multiple battery cell tabs 102. The conductor 2 has three current-passing portions 22 arranged spaced apart along the battery cell stacking direction. Adaptively, the number of sockets 11 in each row is also correspondingly set to two, with each row of two sockets 11 corresponding to the positive tabs 1021 and negative tabs 1022 of the battery cell tab 102, respectively, so that the positive tabs 1021 and negative tabs 1022 of the battery cell tab 102 can pass through.

[0026] During electrical connection assembly, the positive electrode tabs 1021 of multiple battery cell tabs 102 are connected to the same conductor 2, and the conductor 2 is connected to a commonly used positive busbar in the field to achieve the transmission of positive current. Similarly, the negative electrode tabs 1022 of multiple battery cell tabs 102 are connected to another conductor 2, and the conductor 2 is connected to a commonly used negative busbar in the field to achieve the transmission of negative current.

[0027] Based on this, except for the appendix to this embodiment Figure 2 In addition to the method shown, the battery tab connection device can also consist of only one base 1 and one conductor 2. To achieve positive and negative current transmission, two battery tab connection devices are required. That is, the conductor 2 of one battery tab connection device is connected to multiple positive tabs 1021 to achieve positive current transmission; the conductor 2 of the other battery tab connection device is connected to multiple negative tabs 1022 to achieve negative current transmission. The bases 1 of the two battery tab connection devices can be assembled and connected by methods such as splicing, gluing, or tight contact. This also allows for the combined transmission of positive and negative current from multiple battery tabs 102, and the design can be selected according to the actual situation.

[0028] In addition, the structural form of the battery cell tab 102 is as follows: Figure 2 In addition to the method shown, the battery cell tab 102 can also be a double-sided tab. When the battery cell tab 102 is a double-sided tab, there are two battery cell tab connection devices. One battery cell tab connection device is connected to the positive tab 1021 of the battery cell tab 102 located at one end of the battery cell 100, and the other battery cell tab connection device is connected to the negative tab 1022 of the battery cell tab 102 located at one end of the battery cell 100.

[0029] That is to say Figure 6As shown, the positive electrode tab 1021 and negative electrode tab 1022 of the battery cell 100 are located at opposite ends, one at the top and the other at the bottom. In this case, a battery cell tab connection device needs to be installed at both the top and bottom ends of the battery cell 100. The upper battery cell tab connection device is connected to the positive electrode tabs 1021 of multiple battery cells 100, and the lower battery cell tab connection device is connected to the negative electrode tabs 1022 of multiple battery cells 100, so as to realize the combined transmission of positive and negative electricity in the case of dual-sided tabs.

[0030] Based on the above, the battery cell tab 102 can also be... Figure 7 The structure shown is also a dual-sided tab structure. The positive tab 1021 of the battery cell 100 is located at the upper end of the battery cell 100, and the positive tab 1021 includes two spaced-apart, separate first positive tab 1021a and second positive tab 1021b. Similarly, the negative tab 1022 of the battery cell 100 is located at the lower end of the battery cell 100, and the negative tab 1022 includes two spaced-apart, separate first negative tab 1022a and second negative tab 1022b. In this case, in order to realize the combined transmission of positive and negative electricity from multiple sets of battery cells 100, two battery cell tab connection devices need to be provided, respectively assembled at the top and bottom ends of the battery cell 100. Each battery cell tab connection device includes a base 1 and two conductors 2. For the cell tab connection device mounted on the positive electrode tab 1021 side, one conductor 2 of the cell tab connection device is connected to the first positive electrode tab 1021a of multiple cells 100, and the other conductor 2 of the cell tab connection device is connected to the second positive electrode tab 1021b of multiple cells 100. The current-combining section 21 of these two conductors 2 is further connected to the combined output through the positive busbar. For the cell tab connection device mounted on the negative electrode tab 1022 side, one conductor 2 of the cell tab connection device is connected to the first negative electrode tab 1022a of multiple cells 100, and the other conductor 2 of the cell tab connection device is connected to the second negative electrode tab 1022b of multiple cells 100. The current-combining section 21 of these two conductors 2 is further connected to the combined output through the negative busbar.

[0031] That is, the battery cell tab 102 in this embodiment can be Figure 2 , Figure 6 and Figure 7 Any of the structures shown, Figure 2 , Figure 6 and Figure 7 Any of the various structural forms of the battery electrode tab 102 can be adapted and connected to the battery electrode tab connection device of this embodiment. It is worth noting that the following text of this embodiment mainly refers to... Figure 2The example shown is of battery tab 102, which does not mean that subsequent improvements to the battery tab connection device can only be applied to other details. Figure 2 The electrode structure shown indicates that when the cell electrode 102 adopts... Figure 6 or Figure 7 The same applies in other situations, but will not be elaborated upon in this embodiment.

[0032] Optionally, such as Figure 2 , Figure 4 and Figure 5 As shown, the shape and size of the current-carrying surface 221 are adapted to the shape and size of the connected battery cell tab 102. That is, the positive electrode tab 1021 is adapted to the shape and size of the connected current-carrying surface 221. At the same time, the negative electrode tab 1022 is also adapted to the shape and size of the connected current-carrying surface 221. This allows the positive electrode tab 1021 and the negative electrode tab 1022 to fully cover and fit the corresponding current-carrying surface 221, so as to maximize the contact area between the positive electrode tab 1021 and the current-carrying surface 221, and between the negative electrode tab 1022 and the current-carrying surface 221, thereby increasing the current-carrying area.

[0033] In addition, in some embodiments, it is also possible to select that only the shape and size of the positive electrode tab 1021 of each group of cells 100 are adapted to the shape and size of the current flow surface 221 to which it is connected, and the shape and size of the negative electrode tab 1022 are designed according to actual needs. Its shape may not be completely consistent with the shape of the current flow surface 221, or its size may be smaller than that of the current flow surface 221.

[0034] Similarly, it is also possible to select only the shape and size of the negative electrode tab 1022 of each group of cells 100 that is matched with the current-passing surface 221 to which it is connected, while the shape and size of the positive electrode tab 1021 are not specifically limited and can be designed and selected according to the situation.

[0035] In some embodiments, such as Figure 3 As shown, the base 1 has a support body 12, which is integrally formed with the base 1 and protrudes from the base 1. The support body 12 has a stepped structure. The conductor 2 is bent and covers the support body 12. The support body 12 can effectively support the conductor 2 and prevent the conductor 2 from being deformed under pressure. Preferably, the support body 12 can support and fit together with the current collection part 21 and the current flow part 22 at the same time to prevent the current collection part 21 and the current flow part 22 from being deformed under pressure.

[0036] In addition, in some other embodiments, other methods can be selected to fix the conductor 2 to the base 1. For example, multiple current-passing parts 22 of the conductor 2 can be directly bonded to the base 1 by means of adhesive, and the current-passing part 21 can be suspended and clamped on the base 1. These methods include, but are not limited to, the above methods. The design can be selected according to the actual situation. In this embodiment, the support body 12 is preferably used to support the current-passing part 21 and the current-passing part 22 at the same time.

[0037] Optionally, the base 1 may also have a separator 13, which is integrally formed with the base 1 and protrudes from the base 1. The separator 13 is located between two conductors 2 to insulate and separate the two conductors 2 to prevent electrical connection between the two conductors 2.

[0038] Preferably, the base 1 in this embodiment has both a support body 12 and a partition body 13. There are two support bodies 12, and the two support bodies 12 correspond one-to-one with the two conductors 2. The two support bodies 12 and the partition body 13 can be directly integrally formed on the base 1.

[0039] In some embodiments, such as Figure 2 and Figure 3 As shown, on the side away from the conductor 2, the base 1 has a plurality of protrusions 14 spaced apart along the stacking direction of the battery cells. Adjacent protrusions 14 form a limiting slot 15 for limiting the insertion of the battery cell tab 102. Each limiting slot 15 is connected to a pair of sockets 11, that is, each limiting slot 15 is connected to two sockets 11. After the battery cell tab 102 extends into the limiting slot 15, the positive tab 1021 and the negative tab 1022 of the battery cell tab 102 pass through the two sockets 11 connected to the limiting slot 15, respectively, to realize the limiting connection between the battery cell tab 102 and the base.

[0040] Based on this, such as Figure 3 and Figure 8 As shown, one end of the protrusion 14 extending away from the conductor 2 abuts against the cell body 101 of the cell 100. Thus, a limiting abutment is formed between the protrusion 14 and the cell 100 to limit the cell 100 and prevent the cell 100 from having vertical movement. When the base 1 is under pressure, some of the pressure can be directly transmitted to the cell body 101 through the protrusion 14. The cell body 101 can provide support for the base 1 to reduce the deformation of the base 1 under pressure.

[0041] Based on this, such as Figure 3 As shown, the end of the protrusion 14 that abuts against the battery cell body 101 is provided with an arc portion 141 to prevent the protrusion 14 from being punctured by pressure after long-term use, which could lead to leakage and safety problems.

[0042] In some embodiments, a first limiting structure 1011 and a second limiting structure 1012 are respectively provided on opposite sides of the battery cell body 101, and the protrusion 14 is sandwiched between the first limiting structure 1011 and the second limiting structure 1012. For example, as shown... Figure 5 As shown, in this embodiment, the battery cell body 101 is symmetrically provided with a first limiting structure 1011 and a second limiting structure 1012 in the width direction. When the battery cell tab 102 is inserted into the limiting slot 15, as... Figure 9As shown, the first limiting structure 1011 and the second limiting structure 1012 abut against the two ends of the protrusion 14 in the length direction, so as to limit the width direction of the battery cell body 101 and reduce the movement margin of the battery cell body 101 in the width direction.

[0043] It is worth noting that, in this embodiment, the first limiting structure 1011 and the second limiting structure 1012 can be formed by bending the two ends of the battery cell body 101 in the width direction during molding, that is, the bending portion is a structure that the battery cell body 101 itself has in its molding. In this embodiment, this characteristic can be utilized to make the bending portions at both ends in the width direction serve as the first limiting structure 1011 and the second limiting structure 1012 respectively to abut against the protrusion 14. In addition to the above method, the first limiting structure 1011 and the second limiting structure 1012 can also be specifically designed on the protrusion 14 on the battery cell body 101, such as a snap-fit ​​structure or a support plate structure, to achieve limiting of the width direction of the battery cell body 101.

[0044] In some embodiments, similarly, the first limiting structure 1011 and the second limiting structure 1012 described above can also be symmetrically arranged in the thickness direction of the cell body 101. When the cell tab 102 is inserted into the limiting slot 15, the first limiting structure 1011 abuts against a protrusion 14, and the second limiting structure 1012 abuts against another adjacent protrusion 14, so as to limit the thickness direction of the cell body 101. The design can be selected according to the actual situation.

[0045] In some embodiments, the positive electrode tab 1021 is welded and fixed to the connected flow surface 221, and the negative electrode tab 1022 is welded and fixed to the connected flow surface 221. That is, both the positive electrode tab 1021 and the negative electrode tab 1022 are directly welded and fixed to the flow surface 221 by means of ultrasonic welding or other methods to improve the connection reliability.

[0046] Alternatively, one can choose to weld and fix only the positive electrode tab 1021 to the connected flow surface 221, or only the negative electrode tab 1022 to the connected flow surface 221, depending on the actual situation.

[0047] In some embodiments, such as Figure 8 As shown, the end of the socket 11 facing away from the conductor 2 has an outwardly flared guide slope 111, so that the positive electrode tab 1021 or the negative electrode tab 1022 can pass through the socket 11, reducing the assembly difficulty.

[0048] Furthermore, this application also provides a battery cell assembly, which includes a plurality of battery cells 100 and the aforementioned battery cell tab connection device. Each battery cell 100 includes a battery cell body 101 and a battery cell tab 102 located at one end of the battery cell body 101. The battery cell tab 102 includes a positive electrode tab 1021 and a negative electrode tab 1022. The battery cell tabs 102 of the plurality of battery cells 100 are connected by the battery cell tab connection device. This battery cell assembly includes the aforementioned battery cell tab connection device and also possesses the technical effects brought by the battery cell tab connection device; therefore, this embodiment will not elaborate further.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell tab connection device, characterized in that, include: The base (1) has multiple rows of sockets (11) through it, and the multiple rows of sockets (11) correspond to the battery tabs (102) of multiple sets of battery cells (100) so that the battery tabs (102) can pass through. A conductor (2) is disposed on the base (1). The conductor (2) has a busbar (21) and a plurality of overcurrent sections (22). The plurality of overcurrent sections (22) are arranged at intervals along the cell stacking direction. The busbar (21) has a busbar surface (211). The overcurrent section (22) has an overcurrent surface (221) for electrical connection with the cell tab (102).

2. The battery cell tab connection device according to claim 1, characterized in that, The shape and size of the flow surface (221) are adapted to the shape and size of the connected battery cell tab (102).

3. The battery cell tab connection device according to claim 1, characterized in that, Two conductors (2) are provided, and the two conductors (2) are spaced apart on the base (1). One conductor (2) is electrically connected to the positive electrode (1021) of the multiple battery electrode tabs (102), and the other conductor (2) is electrically connected to the negative electrode (1022) of the multiple battery electrode tabs (102).

4. The battery cell tab connection device according to claim 3, characterized in that, The base (1) has a separator (13) located between the two conductors (2) to insulate the two conductors (2).

5. The battery cell tab connection device according to claim 1, characterized in that, Two battery cell tab connection devices are provided. One of the battery cell tab connection devices is connected to the positive tab (1021) of the battery cell tab (102) located at one end of the battery cell (100), and the other battery cell tab connection device is connected to the negative tab (1022) of the battery cell tab (102) located at one end of the battery cell (100).

6. The battery cell tab connection device according to claim 1, characterized in that, On the side away from the conductor (2), the base (1) has a plurality of protrusions (14) spaced apart along the stacking direction of the battery cells. Two adjacent protrusions (14) form a limiting slot (15) for the battery cell tab (102) to be inserted into. Each limiting slot (15) is connected to the socket (11).

7. The battery cell tab connection device according to claim 6, characterized in that, The end of the protrusion (14) facing away from the conductor (2) abuts against the cell body (101) of the cell (100).

8. The battery cell tab connection device according to claim 6, characterized in that, The battery cell body (101) is provided with a first limiting structure (1011) and a second limiting structure (1012) on opposite sides, and the protrusion (14) is sandwiched between the first limiting structure (1011) and the second limiting structure (1012).

9. The battery cell tab connection device according to any one of claims 1-8, characterized in that, The end of the socket (11) facing away from the conductor (2) has a guide slope (111).

10. A battery cell assembly, characterized in that, It includes a plurality of battery cells (100) and a battery cell tab connection device according to any one of claims 1-9, wherein the battery cell tabs (102) of the plurality of battery cells (100) are connected through the battery cell tab connection device.

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