Busbar assembly and battery module

Abstract

The utility model belongs to the technical field of batteries, and discloses a busbar assembly and a battery module. The busbar assembly comprises a support body and a confluence structure. The bracket body can be buckled at the end part of a battery cell assembly, and the battery cell assembly comprises a plurality of battery cells. The confluence structure comprises a mounting part and a tab connecting part which are connected with each other, the mounting part is mounted on one side of the bracket body, the tab connecting part penetrates through the bracket body, and the tab of the battery cell is inserted into the tab connecting part and is conductively connected with the tab connecting part. According to the busbar assembly, the electric connection of a plurality of battery cells in the battery module can be realized without welding, so that the defects caused by welding are effectively avoided, the finished product quality of the battery module is improved, the assembly process of the battery module is simplified, and the assembly efficiency of the battery module is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a busbar assembly and a battery module. Background Technology

[0002] In the production process of pouch battery modules, laser welding is typically used to weld the tabs of the stacked cells together with the busbars to complete the series and parallel connections between the cells. However, during the laser welding process, welding defects such as incomplete welds, porosity, cracks, embrittlement after the fusion of dissimilar materials, and welding spatter inevitably occur.

[0003] Furthermore, a series of auxiliary welding processes, such as tab bending and tab rolling, are required before laser welding. These auxiliary welding processes not only increase the complexity of the production process but also raise the requirements for equipment and operators, leading to reduced production efficiency and increased production costs for battery modules. Moreover, the use of laser welding in the production of pouch battery modules necessitates the development of specialized welding fixtures, further increasing manufacturing costs.

[0004] In summary, the process of assembling pouch battery modules using laser welding suffers from numerous welding defects, complex production procedures, and high manufacturing costs, which hinders the improvement of production efficiency and product quality.

[0005] Therefore, there is an urgent need for a bus assembly and battery module to solve the above problems. Utility Model Content

[0006] According to one aspect of the present invention, the objective is to provide a bus assembly that enables electrical connection of multiple cells in a battery module without welding, effectively avoiding defects caused by welding, improving the finished product quality of the battery module, simplifying the assembly process of the battery module, and improving the assembly efficiency of the battery module.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] Bus assembly, including:

[0009] The bracket body can be fastened to the end of the battery cell assembly, which includes multiple battery cells;

[0010] The busbar structure includes an interconnected mounting part and a tab connection part. The mounting part is mounted on one side of the bracket body, and the tab connection part passes through the bracket body. The tab of the battery cell is inserted into the tab connection part and is electrically connected to the tab connection part.

[0011] As a preferred embodiment of the busbar assembly provided by this utility model, the bracket body has a mounting groove on the side away from the battery cell, the mounting part is embedded in the mounting groove, and a through hole is opened on the mounting groove corresponding to the tab connection part. The tab connection part can pass through the through hole and extend to the side of the bracket body facing the battery cell.

[0012] As a preferred embodiment of the busbar assembly provided by this utility model, the mounting part is provided with a first connecting hole, and the mounting groove is provided with a second connecting hole corresponding to the first connecting hole. The first connecting hole and the second connecting hole are fixedly connected by a connecting structure.

[0013] As a preferred embodiment of the bus assembly provided by this utility model, the electrode connection part is provided with a plug groove, and the electrode can be plugged into the plug groove and make conductive contact with the inner wall of the plug groove.

[0014] As a preferred embodiment of the busbar assembly provided by this utility model, a guide channel is provided at the entrance of the plug slot, and the diameter of the guide channel gradually decreases along the direction close to the mounting part.

[0015] As a preferred embodiment of the busbar assembly provided by this utility model, the busbar assembly further includes an auxiliary component, which has an abutment portion corresponding to each of the plug slots; the mounting portion is provided with a plug hole, which communicates with the plug slot; the abutment portion is detachably inserted into the plug slot through the plug hole, and can abut the tab against the inner sidewall of the plug slot.

[0016] As a preferred embodiment of the busbar assembly provided by this utility model, the tabs are electrically connected to the contact portion, and each tab is electrically connected through the auxiliary component.

[0017] As a preferred embodiment of the bus assembly provided by this utility model, the bus assembly further includes a plurality of support members, each of which is disposed between the battery cell and the bracket body and sandwiched between adjacent tabs.

[0018] As a preferred embodiment of the busbar assembly provided by this utility model, the bracket body is provided with an abutting protrusion on the side facing the battery cell, and the abutting protrusion can abut against the support member.

[0019] According to another aspect of the present invention, the object is to provide a battery module, the battery module including the cell assembly and the bus assembly as described in any of the above embodiments.

[0020] The beneficial effects of this utility model are:

[0021] The busbar assembly provided by this utility model includes a bracket body and a busbar structure. The bracket body can be fastened to the end of a battery cell assembly, which includes multiple battery cells. In other words, the bracket body can be connected to the battery cell assembly by fastening, simplifying the assembly process. The busbar structure includes an interconnected mounting portion and a tab connection portion. The mounting portion is mounted on one side of the bracket body, and the tab connection portion passes through the bracket body. The tabs of the battery cells are inserted into the tab connection portion and electrically connected to it. That is, the mounting portion enables the connection between the busbar structure and the bracket body, and the tab connection portion and the tabs themselves facilitate the connection, avoiding defects caused by welding, improving the finished quality of the battery module, simplifying the connection method, and increasing assembly efficiency.

[0022] The battery module provided by this utility model includes a cell assembly and the aforementioned bus assembly, which can improve the quality of finished products and increase production efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0025] Figure 2 This is an exploded view of the battery module provided in an embodiment of the present invention;

[0026] Figure 3 This is an exploded view of the bus assembly provided in an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the support body provided in this embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the busbar structure provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the busbar assembly provided in an embodiment of the present invention;

[0030] Figure 7 This is an assembly diagram of the electrode tab, auxiliary parts and busbar structure provided in this embodiment of the utility model;

[0031] Figure 8This is a schematic diagram showing the assembly of the electrode tab, auxiliary parts, and busbar structure provided in this embodiment of the utility model.

[0032] In the picture:

[0033] 10. Battery cell assembly; 11. Battery cell; 12. Electrode tab;

[0034] 100. Bracket body; 110. Mounting groove; 111. Second connecting hole; 120. Through hole; 130. Abutting protrusion; 140. Mounting part;

[0035] 200. Busbar structure; 210. Mounting part; 211. First connecting hole; 212. Insertion hole; 220. Electrode connecting part; 221. Insertion groove; 222. Guide channel;

[0036] 300. Auxiliary parts; 310. Abutment parts;

[0037] 400. Support components. Detailed Implementation

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] This embodiment provides a bus assembly and a battery module. The battery module includes a cell assembly 10 and the bus assembly provided in this embodiment.

[0047] Figure 1 This diagram shows a structural schematic of the battery module provided in an embodiment of the present invention. Figure 2This diagram shows an exploded view of a battery module provided in an embodiment of the present invention. The battery cell assembly 10 includes a plurality of battery cells 11, and the tabs 12 of the battery cells 11 can be connected to the bus assembly provided in this embodiment. In this embodiment, the battery cell assembly 10 includes a plurality of battery cells 11 stacked together, each battery cell 11 being provided with a tab 12, and the tabs 12 of two adjacent battery cells 11 being parallel to each other and spaced apart.

[0048] Figure 3 This diagram shows an exploded view of the bus assembly provided in an embodiment of the present invention. Figure 4 This diagram shows a structural schematic of the support body provided in an embodiment of the present invention. Figure 5 A schematic diagram of the busbar structure provided in an embodiment of this utility model is shown. (Refer to...) Figures 3-5 The bus assembly includes a bracket body 100 and a bus structure 200. The bracket body 100 can be fastened to the end of the battery cell assembly 10, the bus structure 200 is mounted on the bracket body 100, and the tab 12 can be connected to the bus structure 200 by plugging in.

[0049] In this embodiment, in order to connect the tabs 12 of the multiple stacked battery cells 11, the bracket body 100 is provided with multiple busbar structures 200, and the multiple tabs 12 can be plugged into and connected to the corresponding busbar structure 200.

[0050] Continue to refer to Figure 1 and Figure 2 The bracket body 100 has a locking portion 140 at each end. The locking portion 140 is integrally formed on the main body of the bracket body 100 and is perpendicular to the main body of the bracket body 100. The locking portion 140 can abut against the outside of the electrode tab 12 located at the end to protect the electrode tab 12 located at the end.

[0051] Continue to refer to Figures 3-5 The busbar structure 200 includes an interconnected mounting portion 210 and a tab connection portion 220. In this embodiment, the mounting portion 210 and the tab connection portion 220 are integrally formed. The mounting portion 210 can be mounted on one side of the bracket body 100. Two tab connection portions 220 are provided on the mounting portion 210, and the two tab connection portions 220 are arranged parallel to each other and spaced apart in the width direction of the mounting portion 210. The tab connection portion 220 can pass through the bracket body 100 and extend towards the direction of the battery cell 11. The tab 12 can be inserted into the tab connection portion 220 and electrically connected to it. The connection is achieved by inserting the tab connection portion 220 and the tab 12, which avoids the defects caused by welding, improves the finished quality of the battery module, simplifies the connection method, and improves assembly efficiency.

[0052] Specifically, the bracket body 100 has a mounting groove 110 on the side opposite to the battery cell 11, and the mounting part 210 can be embedded in the mounting groove 110, and the mounting part 210 can be flush with the main body of the bracket body 100. The mounting groove 110 has a through hole 120 corresponding to the tab connection part 220, and the tab connection part 220 can pass through the through hole 120 and extend to the side of the bracket body 100 facing the battery cell 11 for the tab 12 to be inserted.

[0053] More specifically, the mounting part 210 has first connecting holes 211 near both ends along its length, and correspondingly, the bottom of the mounting groove 110 has second connecting holes 111 at the positions corresponding to the first connecting holes 211. By installing connecting structures such as plastic screws into the corresponding first connecting holes 211 and second connecting holes 111, the connection reliability of the mounting part 210 in the mounting groove 110 can be further improved, thereby ensuring the assembly reliability of the busbar structure 200 and the bracket body 100.

[0054] More specifically, the tab connection portion 220 has a insertion slot 221, into which the tab 12 can be inserted and make conductive contact with the inner wall of the insertion slot 221. In this embodiment, the tab connection portion 220 is made of a conductive material such as copper, which enables the convergence of multiple battery cells 11.

[0055] More specifically, a guide channel 222 is provided at the entrance of the insertion slot 221, and the diameter of the guide channel 222 gradually decreases along the direction close to the mounting part 210. That is, the guide channel 222 has a funnel-shaped structure, with a larger diameter at its entrance and a smaller diameter at its exit point communicating with the insertion slot 221, which is equal to the inner diameter of the insertion slot 221. The guide channel 222 can provide guidance for the tab 12, facilitating the smoothness and accuracy of inserting the tab 12 into the insertion slot 221.

[0056] Continue to refer to Figure 1 and Figure 3 The support body 100 has an abutment protrusion 130 on the side facing the battery cell 11, which abuts against the battery cell 11. In this embodiment, there are multiple abutment protrusions 130. When the bus assembly is assembled to the end of the battery cell assembly 10, each abutment protrusion 130 is located between two adjacent tabs 12. The abutment protrusion 130 can maintain the distance between the support body 100 and the battery cell assembly 10, thereby improving the stability of the assembly between the two.

[0057] Specifically, the bus assembly also includes multiple support members 400. Each support member 400 is specifically disposed between the corresponding abutment protrusion 130 on the battery cell 11 and the bracket body 100, and sandwiched between two adjacent tabs 12. The support member 400 serves as a physical spacer and positioning element between adjacent tabs 12, ensuring that the tabs 12 are accurately aligned when inserted into the plug slot 221, avoiding connection problems caused by misalignment of the tabs 12, and ensuring the reliability of multiple battery cells 11 connected in series and parallel under the solderless connection method.

[0058] In this embodiment, the support member 400 can specifically be a support foam with a certain degree of elasticity. During the stacking of the battery cells 11 and the insertion of the tabs 12 into the insertion slots 221, the support member 400 can also absorb vibration and impact to prevent the tabs 12 from being damaged due to stress concentration during the connection process. At the same time, it ensures the long-term stability of the tabs 12 and reduces fatigue damage to the electrical connections of the tabs 12. In other words, the support foam not only provides electrical isolation, but also increases the overall mechanical strength of the battery module by supporting the tabs 12, preventing displacement and loosening between multiple battery cells 11, and improving the structural stability of the battery module.

[0059] It should be noted that the supporting foam has insulating properties, forming effective physical insulation between the multiple tabs 12, preventing contact between the tabs 12 during use, avoiding short circuits, and improving the electrical safety of the battery module. Furthermore, the supporting foam offers flexible installation, allowing it to accommodate minor installation errors in the solderless connection between the busbar structure 200 and the tabs 12, ensuring a stable connection between the tabs 12 and the busbar structure 200, while also allowing for a certain range of displacement adjustment, facilitating production operations.

[0060] Figure 6 A schematic diagram of the busbar assembly provided in an embodiment of the present invention is shown; Figure 7 This diagram shows an assembly schematic of the electrode tab, auxiliary components, and busbar structure provided in an embodiment of the present invention. Figure 8 This diagram illustrates the assembly of the electrode tab, auxiliary component, and busbar structure according to an embodiment of the present invention. (Refer to...) Figures 6 to 8 In another embodiment, the inner diameter of the insertion slot 221 is larger than the thickness of the tab 12. The bus assembly also includes an auxiliary component 300, which has an abutment portion 310 corresponding to each insertion slot 221. The mounting portion 210 has an insertion hole 212 that communicates with the insertion slot 221. The abutment portion 310 is detachably inserted into the insertion slot 221 through the insertion hole 212 to reliably press the tab 12 against the inner wall of the insertion slot 221, thereby ensuring reliable contact between the tab 12 and the inner wall of the insertion slot 221.

[0061] Specifically, the auxiliary component 300 can be a wedge-shaped block, the smaller diameter end of which can be inserted into the insertion slot 221 from the end of the electrode connection 220 away from the battery cell 11, such as... Figure 6 As shown, after insertion, the wedge block, the tab 12, and the insertion slot 221 are assembled in the following state: Figure 7 As shown.

[0062] More specifically, the auxiliary component 300 can also be an elastic structure, which includes two elastic elements arranged at an angle and fixed to each other at one end. During the process of inserting the elastic structure into the insertion slot 221, the opposite side walls of the insertion slot 221 can abut against the two elastic elements respectively to bring them closer together. After the elastic structure is inserted into place, the two elastic elements return to their original state to be stably inserted into the insertion slot 221 and press the tab 12 against the inner side wall of the insertion slot 221.

[0063] Alternatively, if an auxiliary component 300 is provided in the insertion slot 221, the busbar structure 200 can be made of an insulating material and not serve as a busbar. In this case, the auxiliary component 300 can be made of a conductive material, and the tab 12 can be electrically connected to the contact portion 310. Each tab 12 can be electrically connected through the auxiliary component 300, so that the auxiliary component 300 can be used as a busbar component.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A busbar assembly, characterized in that include: The bracket body (100) can be fastened to the end of the cell assembly (10), which includes a plurality of cells (11); The busbar structure (200) includes an interconnected mounting part (210) and a tab connection part (220). The mounting part (210) is mounted on one side of the bracket body (100). The tab connection part (220) passes through the bracket body (100). The tab (12) of the battery cell (11) is inserted into the tab connection part (220) and is electrically connected to the tab connection part (220).

2. The busbar assembly of claim 1, wherein, The bracket body (100) has a mounting groove (110) on the side away from the battery cell (11). The mounting part (210) is embedded in the mounting groove (110). A through hole (120) is opened on the mounting groove (110) corresponding to the tab connection part (220). The tab connection part (220) can pass through the through hole (120) and extend to the side of the bracket body (100) facing the battery cell (11).

3. The busbar assembly of claim 2, wherein, The mounting part (210) is provided with a first connecting hole (211), and the mounting groove (110) is provided with a second connecting hole (111) corresponding to the first connecting hole (211). The first connecting hole (211) and the second connecting hole (111) are fixedly connected by a connecting structure.

4. The busbar assembly of claim 1, wherein, The tab connection part (220) has a plug groove (221), and the tab (12) can be plugged into the plug groove (221) and make conductive contact with the inner wall of the plug groove (221).

5. The busbar assembly of claim 4, wherein, A guide channel (222) is provided at the entrance of the insertion slot (221), and the diameter of the guide channel (222) gradually decreases along the direction close to the mounting part (210).

6. The busbar assembly of claim 4, wherein, The bus assembly also includes an auxiliary component (300), which has an abutment portion (310) corresponding to each of the plug slots (221); the mounting portion (210) has a plug hole (212) that communicates with the plug slot (221); the abutment portion (310) is detachably inserted into the plug slot (221) through the plug hole (212) and can abut the tab (12) against the inner wall of the plug slot (221).

7. The busbar assembly of claim 6, wherein, The tab (12) is electrically connected to the contact portion (310), and each tab (12) is electrically connected through the auxiliary member (300).

8. The busbar assembly of any of claims 1-7, wherein, The bus assembly also includes a plurality of support members (400), each of the support members (400) being disposed between the battery cell (11) and the bracket body (100) and sandwiched between adjacent tabs (12).

9. The busbar assembly of claim 8, wherein, The bracket body (100) has an abutment protrusion (130) on the side facing the battery cell (11), and the abutment protrusion (130) can abut against the support member (400).

10. A battery module, characterized by Includes the battery cell assembly (10) and the bus assembly as described in any one of claims 1-9.

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