Electrode connection structure and battery module

Abstract

The utility model belongs to the technical field of batteries, and discloses an electrode connecting structure and a battery module, the electrode connecting structure is used for being connected to the battery module and comprises an electric connecting device, and the electric connecting device comprises a first connecting piece, a second connecting piece and a third connecting piece; the first connecting piece is used for being connected with a battery cell tab of the battery module, the third connecting piece is used for being connected with external equipment, the second connecting piece is respectively connected with the first connecting piece and the third connecting piece, and the first connecting piece, the second connecting piece and the third connecting piece are integrated. Complicated steps of installing and connecting all the components one by one in a traditional split type design are reduced, the assembling process is simplified, the production efficiency is greatly improved, meanwhile, the loosening problem caused by long-term use or vibration is avoided, more stable and reliable electrical connection is provided, the fault risk caused by poor connection is effectively reduced, and the product quality is improved. And the overall stability and safety of the battery module are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electrode connection structure and a battery module. Background Technology

[0002] Currently, the electrode connection structure in a battery module consists of connection terminals and adapters. It is mainly used to transmit current. The connection terminals are used to connect to the electrodes of the battery cells to ensure that the battery cells can output current stably. The adapters are used to connect to external devices or other battery modules to realize the power exchange between the battery module and the external system.

[0003] However, existing connection terminals and adapters are separate components. The design of these separate components makes the assembly process of the connection structure more complicated, requiring more manpower and time. Moreover, during long-term use, due to factors such as vibration, the connection between the separate components is prone to loosening, which further reduces the reliability of the connection and increases the risk of battery module failure. Utility Model Content

[0004] The main purpose of this utility model is to provide an electrode connection structure and a battery module, which aims to solve the technical problem that the components of the existing electrode connection structure are separate parts, resulting in complicated assembly and low connection reliability.

[0005] To achieve the above-mentioned utility model objectives, this utility model proposes an electrode connection structure for connection to a battery module, including an electrical connection device, wherein the electrical connection device includes a first connector, a second connector and a third connector;

[0006] The first connector is used to connect the battery cell tabs of the battery module, the third connector is used to connect external devices, the second connector is connected to the first connector and the third connector respectively, and the first connector, the second connector and the third connector are integrated into one piece.

[0007] Furthermore, the second connector includes a covering portion and a bent portion, the bent portion being connected to the side of the covering portion adjacent to where the third connector is disposed, and the first connector being connected to the side of the bent portion away from the covering portion.

[0008] Furthermore, the first connector is provided with a plurality of tab protrusion holes through which the battery cell tabs pass.

[0009] Furthermore, the electrode connection structure also includes a covering device, which includes an insulating component. The insulating component includes an insulating body and a bent portion connected to the insulating body. The insulating body covers the covering portion, and the bent portion covers the bent portion.

[0010] Furthermore, the covering device also includes a flip-top assembly, the flip-top assembly including a receiving portion connected to the insulating body on the side away from the first connector, and the third connector disposed within the receiving portion.

[0011] Furthermore, the receiving portion includes a base plate, and a first side plate, a second side plate, and a third side plate respectively disposed on the base plate. The second side plate and the third side plate are disposed opposite to each other and are respectively connected to the first side plate. The base plate, the first side plate, the second side plate, and the third side plate together form a receiving space with an opening. The third connecting member is located in the receiving space and is attached to the base plate.

[0012] Furthermore, the covering device also includes a support portion, which is disposed at the bottom of the base plate and corresponds to the third connector, and the support portion is connected to the base plate and the insulating body respectively.

[0013] Furthermore, the support portion, the insulating body, the bending portion, and the receiving portion are integrally injection molded.

[0014] Furthermore, the flip-top assembly also includes a cover plate, which is disposed at the end of the receiving portion away from the insulating body. The first end of the cover plate is rotatably connected to the rotating groove of the top opening of the second side plate via a rotating column, and the second end of the cover plate is snapped into the snap hole of the third side plate via a snap-fit ​​part.

[0015] Furthermore, a first fixing part is provided on the side of the third side plate away from the receiving space, and a second fixing part is provided on the side of the insulating body away from the bottom plate, with the first fixing part and the second fixing part arranged diagonally.

[0016] This utility model also proposes a battery module, including the electrode connection structure described in any of the above embodiments.

[0017] Beneficial effects:

[0018] This utility model discloses an electrode connection structure for connection to a battery module, comprising an electrical connection device including a first connector, a second connector, and a third connector. The first connector is used to connect to the battery cell tabs of the battery module, the third connector is used to connect to external devices, and the second connector is connected to both the first and third connectors. The first, second, and third connectors are integrated into a single unit, reducing the complex steps required for individual installation and connection of components in traditional split designs. This simplifies the assembly process, significantly improves production efficiency, and avoids loosening of components due to long-term use or vibration. It provides a more stable and reliable electrical connection, effectively reducing the risk of malfunctions caused by poor connections and improving the overall stability and safety of the battery module. Attached Figure Description

[0019] Figure 1 This is an exploded view of the electrode connection structure according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the electrode connection structure cover plate opened according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the closed cover plate of the electrode connection structure according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of a battery module according to an embodiment of the present invention;

[0023] Figure 5 This is an embodiment of the present utility model. Figure 4 A magnified view of part A.

[0024] in:

[0025] 100. Electrode connection structure; 200. Encapsulation device; 300. Battery module; X. First direction;

[0026] 1. First connector; 2. Second connector; 3. Third connector; 4. Electrode extension hole;

[0027] 20. Covering part; 21. Bending part;

[0028] 5. Insulation component; 6. Flip-top component; 7. Support component; 8. First fastener; 9. Side end plate; 10. External copper busbar;

[0029] 50. Insulating body; 51. Bending section;

[0030] 60. Receiving part; 61. Cover plate; 62. Rotating column; 63. Snap-fit ​​part; 64. Adapter;

[0031] 601. Base plate; 602. First side plate; 603. Second side plate; 604. Third side plate; 606. Rotating groove; 607. Snap-fit ​​hole; 608. First fixing part; 609. Second fixing part; 610. Second fastener; 611. Third fastener.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] 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.

[0037] Reference Figure 1 , Figure 4 This embodiment provides an electrode connection structure 100 for connection to a battery module 300, including an electrical connection device, which includes a first connector 1, a second connector 2 and a third connector 3;

[0038] The first connector 1 is used to connect the battery cell tabs of the battery module 300, the third connector 3 is used to connect external devices, the second connector 2 is connected to the first connector 1 and the third connector 3 respectively, and the first connector 1, the second connector 2 and the third connector 3 are an integral part.

[0039] In the above embodiments, the electrode connection structure 100 is used for the electrical connection of the battery module 300, that is, the electrode connection structure 100 is connected to the total positive (total negative) terminals of the battery module 300, so that the electrode connection structures 100 are respectively a positive electrode connection structure and a negative electrode connection structure with the same structure. The electrode connection structure 100 includes an electrical connection device, which is preferably a copper busbar. The electrical connection device is composed of a first connector 1, a second connector 2, and a third connector 3. The battery cell tab is the conductive part in the battery cell, which is responsible for transmitting the current generated inside the battery. To the external circuit, the first connector 1 is located inside the battery module 300, closely attached to the cell tab, directly connecting the first connector 1 to the cell tab, typically fixed by welding. The second connector 2 and the third connector 3 are located outside the battery module 300. One side of the second connector 2 connects to the first connector 1, and the other side connects to the third connector 3. The third connector 3 is used to connect to external devices, such as other battery modules 300 or power systems, to achieve electrical energy exchange. The first connector 1, second connector 2, and third connector 3 are all integrated into one unit. Therefore, the integrated design of the electrode connection structure 100 reduces the complex steps required to install and connect each component individually in the traditional split design. This not only simplifies the assembly process but also greatly improves production efficiency. It also avoids loosening between components due to long-term use or vibration, providing a more stable and reliable electrical connection, effectively reducing the risk of failure due to poor connection, and improving the overall stability and safety of the battery module 300.

[0040] Reference Figures 1-2 , Figures 4-5 In one embodiment, the second connector 2 includes a covering portion 20 and a bending portion 21. The bending portion 21 is connected to the side of the covering portion 20 adjacent to the side where the third connector 3 is disposed, and the first connector 1 is connected to the side of the bending portion 21 away from the covering portion 20.

[0041] In the above embodiment, the second connector 2 includes a covering portion 20 and a bending portion 21. When the second connector 2 is connected to the battery module 300, the covering portion 20 is attached to the side end plate 9 of the battery module 300. The bending portion 21 is an L-shaped structure, with its short side connected to the covering portion 20 and its long side connected to the first connector 1, forming a 90-degree angle. This creates a certain gap between the first connector 1 and the covering portion 20. The width of this gap is equal to the length of the long side of the bending portion 21 and also equal to the thickness of the side end plate 9 of the battery module 300, ensuring that when the electrode connection structure 100 is installed on the battery module 300... When in use, the first connector 1 can be completely located inside the battery module 300, while the second connector 2 and the third connector 3 are located outside the battery module 300. In addition, the third connector 3 is connected to one end of the second connector 2, and the third connector 3 is bent away from the first connector 1. That is, the third connector 3 extends out from the cover part 20 and bends away from the side end plate 9 of the battery module 300, so that the third connector 3 is perpendicular to the second connector 2. Thus, the third connector 3 and the side end plate 9 are perpendicular to each other in space. Therefore, the compact design of the second connector 2 saves space and makes it easier to connect with other external devices.

[0042] Furthermore, the first connector 1 is provided with multiple tab protrusion holes 4 through which the power supply cell tabs pass. These tab protrusion holes 4 extend a specified distance along the first direction X of the first connector 1, where the first direction X of the first connector 1 is the height direction of the first connector 1. This ensures that each cell tab can be accurately passed through and welded onto the first connector 1, improving the efficiency and stability of current transmission. The first connector 1 is also provided with multiple threaded holes located on both sides of the extension direction of the tab protrusion holes 4. After the bolt passes through the threaded holes, the first connector 1 can be tightly fixed to the corresponding position of the battery module 300, preventing loosening or displacement caused by vibration or other external forces.

[0043] Reference Figures 1-2 , Figure 4 In one embodiment, the electrode connection structure 100 further includes a covering device 200, the covering device 200 including an insulating component 5, the insulating component 5 including an insulating body 50 and a bent portion 51 connected to the insulating body 50, the insulating body 50 covering the covering portion 20, and the bent portion 51 covering the bent portion 21.

[0044] In the above embodiments, the electrode connection structure 100 further includes a covering device 200, which is composed of an insulating component 5. The insulating component 5 mainly includes an insulating body 50 and a bent portion 51. The insulating body 50 corresponds to the covering portion 20 and covers the covering portion 20, so that the insulating body 50 is mainly used to wrap the covering portion 20 to provide electrical isolation. The bent portion 51 is provided on the side of the insulating body 50. The design of the bent portion 51 corresponds to the bending portion 21. The bent portion 51 is mainly used to cover the bending portion 21. The bent portion 51 extends along the contour of the bending portion 21. The insulating body 50 and the bent portion 51 provide a sufficient insulating protective layer for the second connector 2, effectively preventing current leakage and short circuit, and enhancing the safety of the entire connection structure.

[0045] Furthermore, the covering device 200 also includes a flip-top assembly 6, which is composed of a receiving portion 60 connected to the insulating body 50. The receiving portion 60 is connected to the side of the insulating body 50 away from the first connector 1, that is, the receiving portion 60 is located on the front of the insulating body 50 and extends away from the first connector 1. The bending portion 51 is located on the side of the insulating body 50 and extends towards the first connector 1. At the same time, the receiving portion 60 is perpendicular to the insulating body 50, meaning that the direction of the receiving portion 60 is at a 90-degree angle to the plane of the insulating body 50. This causes the receiving portion 60 to bend away from the first connector 1, thereby providing an independent and safe installation space for the third connector 3. The third connector 3 is located inside the receiving portion 60, ensuring that the third connector 3 can be operated without interfering with other components, thus simplifying the maintenance and repair process.

[0046] Reference Figures 1-3 In one embodiment, the receiving portion 60 includes a base plate 601 and a first side plate 602, a second side plate 603, and a third side plate 604 respectively disposed on the base plate 601. The second side plate 603 and the third side plate 604 are disposed opposite to each other and are respectively connected to the first side plate 602. The base plate 601, the first side plate 602, the second side plate 603, and the third side plate 604 together form a receiving space with an opening. The third connecting member 3 is located in the receiving space and is attached to the base plate 601.

[0047] In the above embodiment, the receiving part 60 includes a base plate 601, a first side plate 602, a second side plate 603, and a third side plate 604. The base plate 601 serves as the basic structure, providing the main supporting plane to ensure that the third connector 3 can be stably attached to it. The first side plate 602 is vertically disposed on one side of the base plate 601 and connected to the second side plate 603 and the third side plate 604. The second side plate 603 and the third side plate 604 are disposed opposite to each other and are respectively connected to the two ends of the first side plate 602, forming a U-shaped structure. Both are perpendicular to the base plate 601, so that the base plate 601, the first side plate 602, the second side plate 603, and the third side plate 604 together enclose a receiving space with an open structure. The design of the opening facilitates the installation and maintenance of the third connector 3, making the operation more convenient.

[0048] Furthermore, the covering device 200 also includes a support portion 7, which is disposed at the bottom of the base plate 601 and is arranged correspondingly to the third connector 3. The main function of the support portion 7 is to enhance the mechanical strength of the entire structure and ensure that the third connector 3 can be firmly fixed to the base plate 601. At the same time, the support portion 7, the insulating body 50, the bending portion 51, and the receiving portion 60 are injection molded in one piece in a mold to ensure seamless connection and precise alignment between the components. One side of the support portion 7 is connected to the base plate 601, and the other side of the support portion 7 is connected to the insulating body 50. The support part 7 is connected to the base plate 601 and the insulating body 50 on its two adjacent sides respectively. In addition, the threaded holes on the base plate 601, the threaded holes on the third connector 3, and the threaded holes in the support part 7 are arranged correspondingly and located on the same axis. This means that when the first fastener 8 (such as a bolt) passes through the third connector 3 and the base plate 601 in sequence, it can be finally threaded into the support part 7, thereby firmly fixing the third connector 3 to the base plate 601 and ensuring that the third connector 3 will not loosen or shift due to vibration or external impact during use.

[0049] Reference Figures 1-5 In one embodiment, the flip-top assembly 6 further includes a cover plate 61, which is disposed at the end of the receiving portion 60 away from the insulating body 50. The first end of the cover plate 61 is rotatably connected to the rotating groove 606 of the top opening of the second side plate 603 via a rotating post 62, and the second end of the cover plate 61 is snapped into the snap hole 607 of the third side plate 604 via a snap-fit ​​portion 63.

[0050] In the above embodiment, the flip-top assembly 6 further includes a cover plate 61, which is disposed at the end of the receiving portion 60 away from the insulating body 50. Its main function is to cover and protect the third connector 3 within the receiving portion 60, providing a certain degree of insulation protection for the third connector 3. The cover plate 61 is an openable and closable assembly. The first end of the cover plate 61 is connected to the rotating groove 606 at the top opening of the second side plate 603 via a rotating post 62, allowing the cover plate 61 to rotate around the rotating post 62 to open or close. The second end of the cover plate 61 is connected to the snap-fit ​​hole 607 on the third side plate 604 via a snap-fit ​​part 63. Preferably, the first and second ends of the cover plate 61 are arranged opposite to each other, and the rotating post 62 is disposed at the first end of the cover plate 61. To enable the cover plate 61 to rotate, a rotating post 62 is inserted into a rotating groove 606 at the top opening of the second side plate 603, forming a rotating shaft that allows the cover plate 61 to rotate freely around this shaft. The rotating groove 606 is located at the top of the second side plate 603 and has a top opening structure, allowing the rotating post 62 to be inserted into the rotating groove 606 from the top opening. A latching hole 607 is located on the third side plate 604 and is used to receive and lock the latching part 63. The latching part 63 is located at the second end of the cover plate 61 and is typically a small hook-shaped structure. When the cover plate 61 is closed, the latching part 63 automatically inserts into the latching hole 607 on the third side plate 604, forming a secure closed state and ensuring that the cover plate 61 is securely fixed when closed.

[0051] Furthermore, when the cover plate 61 is closed on the receiving part 60, an adapter 64 is formed on the side of the receiving part 60. The adapter 64 is used for inserting the external copper busbar 10. That is, the external copper busbar 10 is connected to the third connector 3 in the receiving part 60 through the adapter 64, and then connected to the external device through the external copper busbar 10. The external device can be other battery modules 300, and its connection method is series or parallel. The top opening in the receiving space is arranged adjacent to the adapter 64, and the adapter 64 is arranged opposite to the first side plate 602, so that the adapter 64 is located on the side of the receiving part 60 away from the battery module 300. Open the cover plate 61 and insert the external copper busbar. The external copper busbar 10 and the third connector 3 are fitted together. The external copper busbar 10 is provided with threaded holes corresponding to the third connector 3. Then, the first fastener 8 passes through the threaded holes on the external copper busbar 10, the third connector 3 and the base plate 601 in sequence. The first fastener 8 is then threaded into the support part 7, so that the external copper busbar 10 is connected to the third connector 3 through the first fastener 8. The cover plate 61 is then re-covered on the receiving part 60. Then, the external copper busbar 10 extends from the adapter 64 to connect to external equipment, so that the external copper busbar 10 can be easily inserted and connected to the third connector 3 through the adapter 64. This reduces the time and complexity of manual operation and improves production efficiency.

[0052] Furthermore, a first fixing part 608 is provided on the third side plate 604, and the first fixing part 608 is located on the side of the third side plate 604 away from the receiving space. At the same time, the side of the first fixing part 608 facing the battery module 300 and the side of the first side plate 602 facing the battery module 300 are on the same plane, so that the first fixing part 608 is firmly connected to the side end plate 9 of the battery module 300 by the second fastener 610. A second fixing part 609 is provided on the side of the insulating body 50 away from the bottom plate 601. Part 609 is connected to the side end plate 9 of the battery module 300 by the third fastener 611. The first fixing part 608 and the second fixing part 609 are arranged diagonally, meaning that they are located at opposite corners of the entire covering device 200. This ensures that the covering device 200, which covers the second connector 2 and the third connector 3, is fixedly connected to the side end plate 9 of the battery module 300, ensuring that the covering device 200 is subjected to balanced force in different directions and improving the stability of the entire electrode connection structure 100 connected to the battery module 300.

[0053] Reference Figure 1 , Figure 4 The present invention also proposes a battery module 300, including the electrode connection structure 100 described in any of the above embodiments, wherein the electrode connection structure 100 is fixedly connected to the side end plate 9 of the battery module 300, ensuring that the electrode connection structure 100 will not loosen or shift due to vibration or other external forces, thereby improving the reliability and service life of the entire battery module 300.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. An electrode connection structure for connection to a battery module, characterized in that, Includes an electrical connection device, the electrical connection device comprising a first connector, a second connector, and a third connector; The first connector is used to connect the battery cell tabs of the battery module, the third connector is used to connect external devices, the second connector is connected to the first connector and the third connector respectively, and the first connector, the second connector and the third connector are integrated into one piece.

2. The electrode connection structure according to claim 1, characterized in that, The second connector includes a covering portion and a bent portion. The bent portion is connected to the side of the covering portion adjacent to the side where the third connector is disposed. The first connector is connected to the side of the bent portion away from the covering portion.

3. The electrode connection structure according to claim 1, characterized in that, The first connector is provided with a plurality of tab protrusion holes for the battery cell tabs to pass through.

4. The electrode connection structure according to claim 2, characterized in that, The electrode connection structure further includes a covering device, which includes an insulating component. The insulating component includes an insulating body and a bent portion connected to the insulating body. The insulating body covers the covering portion, and the bent portion covers the bent portion.

5. The electrode connection structure according to claim 4, characterized in that, The covering device further includes a flip-top assembly, which includes a receiving portion connected to the insulating body on the side away from the first connector, and the third connector is disposed within the receiving portion.

6. The electrode connection structure according to claim 5, characterized in that, The receiving portion includes a base plate, and a first side plate, a second side plate, and a third side plate respectively disposed on the base plate. The second side plate and the third side plate are disposed opposite to each other and are respectively connected to the first side plate. The base plate, the first side plate, the second side plate, and the third side plate together form a receiving space with an opening. The third connecting member is located in the receiving space and is attached to the base plate.

7. The electrode connection structure according to claim 6, characterized in that, The covering device further includes a support portion, which is disposed at the bottom of the base plate and corresponds to the third connector, and the support portion is connected to the base plate and the insulating body respectively.

8. The electrode connection structure according to claim 7, characterized in that, The support portion, the insulating body, the bending portion, and the receiving portion are integrally injection molded.

9. The electrode connection structure according to claim 6, characterized in that, The flip-top assembly also includes a cover plate, which is disposed at the end of the receiving portion away from the insulating body. The first end of the cover plate is rotatably connected to the rotating groove of the top opening of the second side plate via a rotating column, and the second end of the cover plate is snapped into the snap hole of the third side plate via a snap-fit ​​part.

10. The electrode connection structure according to claim 6, characterized in that, The third side plate has a first fixing part on the side away from the accommodating space, and the insulating body has a second fixing part on the side away from the bottom plate. The first fixing part and the second fixing part are arranged diagonally.

11. A battery module, characterized in that, Includes the electrode connection structure as described in any one of claims 1-10.

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