Battery module kit

Abstract

The application discloses a battery module kit, comprising a battery module and a connecting plate, the battery module comprising two end plates and a plurality of battery cells fixed between the two end plates and arranged in a stack; the connecting plate comprising a main connecting plate and a folded edge, the main connecting plate being configured to be fixed on the side of the end plate away from the battery cells by being threaded through in the thickness direction by a fastener, and the folded edge being configured to be fixed on an electric device by being threaded through in the thickness direction by a fastener. The battery module kit provided by the application connects the main connecting plate with the side of the end plate, and fixes the battery module by using the folded edge, so that the end plate does not need to be threaded through by a fixing member, which not only helps to reduce the thickness of the end plate, thereby reducing the space occupied by the battery module and reducing the material cost, but also helps to reduce the installation difficulty of the battery module and improve the installation efficiency of the battery module.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment technology, and more specifically, to a battery module kit. Background Technology

[0002] In related technologies, a battery module includes two end plates and multiple battery cells stacked between the two end plates. During installation, a fastener passes through the end plates along the height direction and is fixedly connected to the housing of the energy storage device or the chassis of the electric vehicle, thereby securing the battery module to the housing of the energy storage device or the chassis of the electric vehicle. Therefore, the end plates must have a considerable thickness to accommodate the fastener and provide sufficient connection strength, increasing material costs and hindering the miniaturization of the battery module. Utility Model Content

[0003] This application provides a battery module kit to solve at least one of the aforementioned technical problems.

[0004] The battery module kit according to the embodiments of this application includes: A battery module, the battery module comprising two end plates and multiple battery cells stacked and fixed between the two end plates; A connecting plate, comprising a main connecting plate and a folded edge, wherein the main connecting plate is configured to be fixed to the side of the end plate away from the battery cell by fasteners passing through it along the thickness direction, and the folded edge is configured to be fixed to the electrical equipment by fasteners passing through it along the thickness direction.

[0005] The battery module kit provided in this application uses a side connection between the main connecting plate and the end plate, and uses folded edges to fix the battery module. This eliminates the need for fasteners to pass through the end plate, which not only helps to reduce the thickness of the end plate, thereby reducing the space occupied by the battery module and reducing material costs, but also helps to reduce the installation difficulty of the battery module and improve the installation efficiency of the battery module.

[0006] In some embodiments, the battery module kit further includes an integrated busbar, which includes a bracket and an electrical connector. The electrical connector is injection molded onto the bracket, the bracket covers the battery module and is connected to the end plate, and the electrical connector is electrically connected to the electrodes of the battery cell.

[0007] In this way, by setting up an integrated busbar that integrates electrical connectors into the bracket, a high degree of integration between electrical connection and structural fixation is achieved, which helps to improve assembly efficiency, ensure the consistency and reliability of electrical connections, and enhance electrical insulation safety.

[0008] In some embodiments, the electrical connector includes a series aluminum busbar and a data acquisition board, the series aluminum busbar being electrically connected to the electrodes of the battery cell, and the data acquisition board being electrically connected to the series aluminum busbar connected to the battery cells of the same battery module.

[0009] In this way, by setting up electrical connectors responsible for current transmission and signal acquisition respectively, the separation and integration of cell series and parallel connection and voltage, temperature and other information acquisition functions are realized, which facilitates precise management and monitoring of battery modules.

[0010] In some embodiments, the battery module kit further includes foam disposed between the acquisition board and the battery cell.

[0011] In this way, by placing foam between the acquisition board and the battery cell, the acquisition board is buffered and protected, which helps to prevent damage to the acquisition board caused by battery cell expansion or external impact. At the same time, it can also play a certain role in insulation and heat conduction.

[0012] In some embodiments, there are multiple battery modules, and the electrical connector further includes a module connecting aluminum busbar, which is mounted on the bracket, and the multiple battery modules are electrically connected through the module connecting aluminum busbar.

[0013] In this way, by setting up modular connecting aluminum busbars on the integrated busbar, a convenient and orderly electrical connection between multiple battery modules is achieved, which helps to simplify the system structure, improve space utilization, and facilitate large-scale expansion.

[0014] In some embodiments, the battery module further includes a fixing block mounted on the end plate. The fixing block has blind holes with nuts embedded in them. The electrical connector includes an output aluminum busbar that connects the total positive or total negative of the battery module. The output aluminum busbar is connected to the nut by screws to be fixed on the fixing block.

[0015] In this way, by pre-embedding nuts in the fixing block of the end plate and connecting the output aluminum busbar to it with screws, the high current connection point at the output end is firmly and stably fixed, which is beneficial for withstanding greater torque, preventing loosening, and facilitating disassembly and maintenance.

[0016] In some embodiments, the fixing block further includes a mounting through hole, which is a countersunk hole, and the fixing block is fixed to the end plate by fasteners passing through the mounting through hole.

[0017] In this way, by setting the mounting through hole of the fixing block as a countersunk hole, the fastener head can be recessed into the hole, avoiding interference with other components above, which helps to ensure the flatness of the structure and the reliability of the connection.

[0018] In some embodiments, the battery module kit further includes an insulating film attached to the integrated busbar on the side away from the battery module.

[0019] In this way, by attaching an insulating film to the outside of the integrated busbar, additional insulation protection is achieved for the integrated busbar, which helps to prevent short circuits caused by dust, metal foreign objects, etc., and further improves the electrical safety of the battery module kit.

[0020] In some embodiments, the width of the folded edge is 10%-20% of the width of the main connecting plate.

[0021] In this way, while ensuring that the structural strength of the folded edge is sufficient to stably fix the battery module, it also avoids the folded edge being too large, taking up more space and causing material waste.

[0022] In some embodiments, the connecting plate is provided with two lifting holes, which are spaced apart.

[0023] Thus, by setting two spaced lifting holes on the connecting plate, the battery module kit can be lifted and transported in a balanced manner, which facilitates the safe and stable movement of the entire battery module kit during installation and maintenance.

[0024] In some embodiments, the main connecting plate has a lifting part on the side away from the folded edge. The lifting part extends from the edge of the main connecting plate away from the folded edge and extends out of the battery module. The lifting hole is provided on the lifting part.

[0025] In this way, the lifting section is higher than the battery module, making it easier for the lifting tools to pass through the lifting hole during lifting.

[0026] In some embodiments, the main connecting plate further includes a reinforcing portion that extends outward from the edge of the hoisting portion away from the main connecting plate and is folded and attached to the edge of the hoisting portion away from the main connecting plate.

[0027] In this way, the reinforcement section can further enhance the structural strength of the hoisting section, and the reinforcement section formed by folding is easier to process.

[0028] In some embodiments, the battery module further includes straps that are fitted over the plurality of cells and the end plate to secure the plurality of cells and the end plate.

[0029] In this way, by using straps to bind multiple cells and end plates, the long bolts that run through the cells and end plates are eliminated, which not only achieves effective constraint and fixation of multiple cells, but also reduces the assembly difficulty of the battery module.

[0030] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is an assembly diagram of the battery module kit according to an embodiment of this application; Figure 2 This is a schematic diagram of the connection plate of the battery module kit according to an embodiment of this application; Figure 3 This is a schematic diagram of the end plate of the battery module kit according to an embodiment of this application; Figure 4 This is a schematic diagram of the integrated busbar structure of the battery module kit according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the fixing block of the battery module kit according to an embodiment of this application.

[0032] Explanation of main component symbols: Battery module kit 100, Battery module 10, End plate 11, Slot 111, Cell 12, Connecting plate 20, Main connecting plate 21, Reinforcing rib 211, Lifting hole 212, Lifting part 213, Reinforcing part 214, Folded edge 22, Integrated busbar 30, Bracket 31, Electrical connector 32, Series aluminum busbar 321, Acquisition board 322, Module connection aluminum busbar 323, Output aluminum busbar 324, Foam 40, Fixing block 50, Nut 51, Mounting through hole 52, Insulating film 60, Strapping 70. Detailed Implementation

[0033] The embodiments of this application 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 application, and should not be construed as limiting this application. In the description of this application, 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," "counterclockwise," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 limiting this application. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the description of this application, it should be noted that, unless otherwise expressly 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 or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0035] In this application, unless otherwise expressly 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 being 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 being 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.

[0036] This disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described herein. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0037] In related technologies, a battery module includes two end plates and multiple battery cells stacked between the two end plates. During installation, a fastener passes through the end plates along the height direction and is fixedly connected to the housing of the energy storage device or the chassis of the electric vehicle, thereby securing the battery module to the housing of the energy storage device or the chassis of the electric vehicle. Therefore, the end plates must have a considerable thickness to accommodate the fastener and provide sufficient connection strength, increasing material costs and hindering the miniaturization of the battery module.

[0038] Please see Figure 1 The battery module kit 100 of this application includes a battery module 10 and a connecting plate 20. The battery module 10 includes two end plates 11 and a plurality of battery cells 12 stacked between the two end plates 11. The connecting plate 20 includes a main connecting plate 21 and a folded edge 22. The main connecting plate 21 is configured to be fixed to the side of the end plate 11 away from the battery cells 12 after being passed through by fasteners along the thickness direction. The folded edge 22 is configured to be fixed to the electrical equipment after being passed through by fasteners along the thickness direction.

[0039] The battery module kit 100 provided in this application uses a main connecting plate 21 to connect to the side of the end plate 11 and uses a folded edge 22 to fix the battery module 10. It does not require fasteners to pass through the end plate 11. This not only helps to reduce the thickness of the end plate 11, thereby reducing the space occupied by the battery module 10 and reducing material costs, but also helps to reduce the installation difficulty of the battery module 10 and improve the installation efficiency of the battery module 10.

[0040] For details, please refer to Figures 1 to 3 In this embodiment of the application, when the connecting plate 20 is installed onto the end plate 11, the main connecting plate 21 is first attached to the outer surface of the end plate 11, and then bolts or screws are used as fasteners to pass through the preset through holes on the main connecting plate 21 and the corresponding threaded holes on the end plate 11 or the nuts 51 set inside the end plate 11 in sequence, so as to achieve a rigid connection between the connecting plate 20 and the battery module 10 in terms of structure.

[0041] In this embodiment, the end plate 11 has an overall axisymmetric structure, and its structure (including reinforcing structure, external lettering, etc.) is completely symmetrical about the vertical centerline. Thus, during installation, the battery module 10 only needs to be flush with the surface of the mounting position of the end plate 11, eliminating the need for a step height difference to accommodate traditional module mounting. To facilitate the installation and positioning of the battery module 10, the end plate 11 also has a first positioning hole.

[0042] In this embodiment, there can be multiple battery modules 10, and multiple battery modules 10 can be arranged side by side along the length direction of the end plate 11. The connecting plate 20 located on the same side of the battery modules 10 is connected to multiple end plates 11 of multiple battery modules 10 at the same time.

[0043] In this embodiment, the folded edge 22 and the main connecting plate 21 are integrally bent and formed. In other embodiments, the folded edge 22 and the main connecting plate 21 can be processed separately and connected by welding. In this embodiment of the application, the main connecting plate 21 is also provided with a reinforcing rib 211. Specifically, the reinforcing rib 211 is a groove-shaped structure formed by stamping along the side perpendicular to the surface of the main connecting plate 21 away from the end plate 11.

[0044] In this embodiment, the folded edge 22 is located on the side of the main connecting plate 21 near the bottom of the battery module 10. The folded edge 22 is folded away from the battery module 10 and is perpendicular to the main connecting plate 21. Multiple mounting holes are evenly spaced on the folded edge 22, and the connecting plate 20 is fixed to the electrical equipment by fasteners passing through the mounting holes.

[0045] In this embodiment of the application, a second positioning hole is also provided on the folded edge 22 to facilitate the installation and positioning of the battery module 10.

[0046] In some embodiments, the width of the folded edge is optionally 10%-20% of the width of the main connecting plate. This ensures sufficient structural strength for the folded edge to stably secure the battery module while avoiding excessively large folded edges that would occupy too much space and waste materials. In the embodiments of this application, the width of the folded edge is approximately 15% of the width of the main connecting plate.

[0047] Please see Figure 1 and Figure 4 In some embodiments, the battery module kit 100 further includes an integrated busbar 30, which includes a bracket 31 and an electrical connector 32. The electrical connector 32 is injection molded onto the bracket 31, the bracket 31 covers the battery module 10 and is connected to the end plate 11, and the electrical connector 32 is electrically connected to the electrodes of the battery cell 12.

[0048] Thus, by setting up an integrated busbar 30 that integrates the electrical connector 32 into the bracket 31, a high degree of integration between electrical connection and structural fixation is achieved, which helps to improve assembly efficiency, ensure the consistency and reliability of electrical connection, and enhance electrical insulation safety.

[0049] Specifically, in this embodiment, the electrical connector 32 is made of pre-stamped and surface-treated copper or aluminum, while the bracket 31 is made of engineering plastics (such as PPA or PA66 with glass fiber). The electrical connector 32 can be embedded into the bracket 31 through injection molding to form an integrated busbar 30. The injection molding process ensures that the portion of the electrical connector 32 encased in plastic has excellent and consistent insulation performance and achieves mechanical positioning. Using the bracket 31 to encapsulate the electrical connector 32 provides insulation reliability and safety far exceeding traditional isolation installations, effectively preventing short-circuit risks caused by vibration, condensation, or foreign objects; the integrated structure also enhances the overall top's resistance to mechanical shock and vibration.

[0050] In other embodiments, the bracket 31 can be injection molded and then fastened with fasteners to install the electrical connector 32 on the bracket 31 to form an integrated busbar 30.

[0051] In this embodiment, the integrated busbar 30 is mounted on top of the battery module 10. The edge portion of the bracket 31 is typically connected and locked to the two end plates 11 via clips, screws, or a truncated structure, achieving mechanical connection and fixation. Specifically, the integrated busbar 30 is locked to the end plates 11 by bolts that penetrate the bracket 31.

[0052] In this way, the multiple parts such as electrical connections and fixed brackets 31 that are scattered in the traditional solution are integrated into a single module, which greatly reduces the total number of parts and assembly steps.

[0053] Please see Figure 1 and Figure 4 In some embodiments, the electrical connector 32 includes a series aluminum busbar 321 and a data acquisition board 322. The series aluminum busbar 321 is electrically connected to the electrodes of the battery cell 12, and the data acquisition board 322 is electrically connected to the series aluminum busbar 321 connected to the battery cell 12 of the same battery module 10.

[0054] In this way, by setting up electrical connectors 32 that are responsible for current transmission and signal acquisition respectively, the separation and integration of the series and parallel connection of the battery cells 12 and the acquisition of information such as voltage and temperature are realized, which facilitates the precise management and monitoring of the battery module 10.

[0055] Specifically, in the embodiments of this application, the series aluminum busbar 321 is usually made of aluminum alloy with good conductivity (such as 1060 or 3003 series). Its shape is designed according to the arrangement of the electrode posts of the battery cell 12. The electrodes of adjacent battery cells 12 are connected in series or in parallel by means of laser welding to form the required electrical circuit.

[0056] In this embodiment, the acquisition board 322 is typically a flexible printed circuit board (FPC) or a rigid PCB, which integrates voltage acquisition lines, terminals for temperature sensors (such as NTC), and corresponding signal transmission lines. The acquisition board 322 is electrically connected to voltage acquisition points led out from specific series aluminum busbars 321 via metal pads or connectors. For example, an additional nickel strip is soldered to the aluminum busbar and then to the FPC to acquire voltage and temperature information for each string of cells 12 and transmit these signals to the battery management system (BMS).

[0057] This not only simplifies the design and manufacturing of each component, but also makes it easier for the BMS to accurately monitor and manage the battery status, avoiding mutual interference between high-voltage and low-voltage circuits, and improving the reliability and accuracy of system management.

[0058] In this embodiment, the surface of the bracket 31 away from the cell 12 is provided with a first mounting groove, and the bottom of the first mounting groove is provided with a window. When the bracket 31 is placed on the battery module 10, the electrodes of the cell 12 are aligned with the window. Furthermore, the series aluminum busbar 321 is installed in the first mounting groove, and the electrodes of the cell 12 extend from the window into the first mounting groove and are welded to the series aluminum busbar 321 to achieve electrical connection between the cell 12 and the series aluminum busbar 321.

[0059] In some embodiments, the series aluminum busbar 321 may extend out of the first mounting groove from the window and be welded to the electrode of the battery cell 12.

[0060] In some embodiments, the electrodes of the series aluminum busbar 321 and the battery cell 12 can both extend into the window and be welded together within the window.

[0061] In this embodiment, the surface of the bracket 31 away from the battery cell 12 is also provided with a second mounting groove, and the acquisition board 322 is installed in the second mounting groove.

[0062] Furthermore, in this embodiment of the application, the number of battery modules 10 can be multiple, each battery module 10 corresponds to a data acquisition board 322 and multiple series aluminum busbars 321, and the multiple series aluminum busbars 321 connected to the battery cells 12 of the same battery module 10 are evenly arranged on both sides of the corresponding data acquisition board 322.

[0063] In this application, the end plate 11 is also provided with a first fixing hole. The first fixing hole is provided one-to-one with the battery module 10 and is used to fix the acquisition board 322 corresponding to the battery module 10. Specifically, when the integrated busbar 30 is covered on the battery module 10, the acquisition board 322 is fixed at the first fixing hole by fasteners that pass through the acquisition board 322.

[0064] Please see Figure 1 In some embodiments, the battery module kit 100 also includes foam 40 disposed between the acquisition board 322 and the battery cell 12.

[0065] Thus, by placing foam 40 between the acquisition board 322 and the battery cell 12, the acquisition board 322 is buffered and protected, which helps to prevent the acquisition board 322 from being damaged due to the expansion of the battery cell 12 or external impact. At the same time, it can also play a certain role in insulation and heat conduction.

[0066] Specifically, in the embodiments of this application, the foam 40 is usually made of a material with good compression resilience and insulation properties, such as silicone foam 40 or polyethylene (PE) foam 40. Furthermore, the thickness and density of the foam 40 need to be selected according to the possible expansion of the cell 12 during its life cycle and the buffer space required by the acquisition board 322.

[0067] In this embodiment, before installing the integrated busbar 30, pre-cut strips or blocks of foam 40 are attached to a specific area on top of the battery cell 12, typically below the acquisition board 322 and avoiding the welding areas of the battery cell 12 terminals and the series aluminum busbar 321. Once the integrated busbar 30 is in place, the foam 40 is slightly compressed, providing continuous upward support to the acquisition board 322 above. Thus, the foam 40 effectively absorbs and disperses the volume expansion stress generated by lithium-ion insertion / extraction during charge / discharge cycles, preventing the acquisition board 322 from bending, breaking, or cracking its solder joints due to prolonged pressure. Secondly, when encountering external vibrations or impacts during transportation or use, the foam 40 layer acts as a buffer, protecting the fragile acquisition board 322 and its electronic components. Furthermore, the foam 40 material itself has certain insulating properties, providing additional electrical isolation protection.

[0068] In some embodiments, the foam 40 can also be selected as a foam 40 with good thermal conductivity. In this way, the foam 40 can also help to conduct the heat generated on the acquisition board 322 or the battery cell 12, and play a certain role in thermal management.

[0069] Please see Figure 1 and Figure 4In some embodiments, there are multiple battery modules 10, and the electrical connector 32 also includes a module connecting aluminum busbar 323. The module connecting aluminum busbar 323 is mounted on the bracket 31, and the multiple battery modules 10 are electrically connected through the module connecting aluminum busbar 323.

[0070] Thus, by setting up a module connection aluminum busbar 323 on the integrated busbar 30, a convenient and orderly electrical connection between multiple battery modules 10 is achieved, which helps to simplify the system structure, improve space utilization and facilitate large-scale expansion.

[0071] Specifically, in the embodiments of this application, the battery module kit 100 is composed of multiple battery modules 10 connected in series or in parallel, and the module connecting aluminum busbar 323 can realize the electrical connection between modules.

[0072] Specifically, the surface of the bracket 31 away from the cell 12 is also provided with a third mounting groove. The module connecting aluminum busbar 323 is installed in the third mounting groove. The bottom of the third mounting groove is provided with two openings. When the bracket 31 is placed on the battery module 10, the electrodes of the two cells 12 located in the two adjacent battery modules 10 are aligned with the two openings respectively. Furthermore, the module connecting aluminum busbar 323 is installed in the third mounting groove. The electrodes of the two cells 12 extend from the openings into the third mounting groove and are welded to the module connecting aluminum busbar 323, so that the two battery modules 10 can be connected in series or in parallel through the module connecting aluminum busbar 323. At the same time, the module connecting aluminum busbar 323 is also welded to the aluminum busbar with nickel sheets and then welded to the acquisition board 322.

[0073] Please see Figure 1 and Figure 5 In some embodiments, the battery module 10 further includes a fixing block 50, which is mounted on the end plate 11. The fixing block 50 has a blind hole, and a nut 51 is embedded in the blind hole. The electrical connector 32 includes an output aluminum busbar 324 that connects the total positive or total negative of the battery module 10. The output aluminum busbar 324 is connected to the nut 51 by screws to fix it on the fixing block 50.

[0074] Thus, by pre-embedding nuts 51 in the fixing block 50 of the end plate 11 and connecting the output aluminum busbar 324 to it with screws, the high current connection point at the output end is firmly and stably fixed, which is beneficial for withstanding greater torque, preventing loosening, and facilitating disassembly and maintenance.

[0075] Specifically, in this embodiment, the fixing block 50 is typically made of high-strength engineering plastic or metal (such as die-cast aluminum alloy), and the required blind hole and mounting through hole 52 structure are formed by machining or molding. During assembly, the nut 51 is first firmly embedded into the bottom of the blind hole of the fixing block 50 by press-fitting or heat-melting. Subsequently, the fixing block 50 is fastened to the pre-designed position on the end plate 11 from above through the mounting through hole 52 using fasteners such as hexagon socket head cap screws.

[0076] In this embodiment, the hole for mounting nut 51 is set as a blind hole, which provides insulation through bottom sealing, preventing the output aluminum busbar 324 from being connected to the battery cell 12 by bolts and causing a short circuit.

[0077] In this embodiment, the sidewall of the fixing block 50 near the blind hole tapers inward and forms an arc-shaped concave portion on the sidewall, thereby reducing the stress generated at this location during installation.

[0078] In this embodiment of the application, the fixing block 50 is provided with a material reduction groove on the side near the end plate 11, and the material reduction groove is provided with a reinforcing rib 211. In this way, not only can the production material be reduced and the production cost reduced, but the structural strength of the fixing tube can also be guaranteed to meet the usage requirements.

[0079] In some embodiments, the fixing block 50 further includes a mounting through hole 52, which is a countersunk hole, and the fixing block 50 is fixed to the end plate 11 by fasteners passing through the mounting through hole 52.

[0080] In this way, by setting the mounting through hole 52 of the fixing block 50 as a countersunk hole, the fastener head is recessed into the hole, avoiding interference with other components above, which helps to ensure the flatness of the structure and the reliability of the connection.

[0081] Specifically, in this embodiment, the mounting through hole 52 is designed as a countersunk hole. A countersunk hole, also known as a countersunk end hole, has a stepped structure with a larger diameter at the upper end and a smaller diameter at the lower end.

[0082] In this embodiment, during installation, the screw head completely falls into the large-diameter portion of the countersunk hole in the fixing block 50 until the lower end face of the head is in contact with the stepped surface inside the hole, while the screw shank passes through the small-diameter through hole below. This ensures that the fastener head does not protrude from the upper surface of the fixing block 50, forming a flat installation interface. This avoids interference with the integrated busbar 30 bracket 31, insulating film 60, or other components above due to the screw head protruding, ensuring the compactness and safety of the stacked structure and improving the overall reliability and consistency of the connection.

[0083] Optionally, the countersunk depth of the countersunk hole should be greater than or equal to the thickness of the screw head.

[0084] Please see Figure 1 In some embodiments, the battery module kit 100 further includes an insulating film 60, which is attached to the side of the integrated busbar 30 away from the battery module 10.

[0085] Thus, by attaching an insulating film 60 to the outside of the integrated busbar 30, additional insulation protection is achieved for the integrated busbar 30, which helps to prevent short circuits caused by dust, metal foreign objects, etc., and further improves the electrical safety of the battery module kit 100.

[0086] Specifically, in the embodiments of this application, the insulating film 60 is usually made of materials with excellent insulation properties, high temperature resistance, flame retardancy and certain mechanical strength and flexibility, such as polyimide (PI) film (a common material for gold finger tape), polyester (PET) film or composite material.

[0087] In this embodiment, the insulating film 60 is typically coated with a high-performance pressure-sensitive adhesive on one side. After the integrated busbar 30 is mounted onto the battery module 10 and all electrical connections are completed, the insulating film 60, precisely cut or die-cut according to the three-dimensional shape of the top of the integrated busbar 30, is carefully applied to the entire upper surface of the integrated busbar 30. The application process must ensure that all exposed conductive metal parts (such as the plane of the aluminum busbar, solder joints, screw heads, etc.) are covered, and that bubbles and wrinkles are minimized as much as possible to ensure good adhesion and insulation.

[0088] Please see Figure 1 and Figure 2 In some embodiments, the connecting plate 20 is provided with two lifting holes 212, which are spaced apart.

[0089] Thus, by setting two spaced hoisting holes 212 on the connecting plate 20, the battery module kit 100 can be hoisted and transported in a balanced manner, which facilitates the safe and stable movement of the entire battery module kit 100 during installation and maintenance.

[0090] Specifically, in this embodiment, the two lifting holes 212 are typically machined symmetrically on the main connecting plate 21 of the connecting plate 20 to ensure that the center of gravity of the entire battery module kit 100 is located below the center of the line connecting the two lifting points during lifting, thus avoiding tilting.

[0091] In some embodiments, the inner diameter of the lifting hole 212 needs to match that of a standard lifting tool (such as a hook or shackle), and a reinforcing boss or welded reinforcing ring is usually designed around it to increase local strength and prevent the hole from deforming or tearing during lifting.

[0092] In some embodiments, the main connecting plate 21 is provided with a lifting part 213 on the side away from the folded edge 22. The lifting part 213 extends from the edge of the main connecting plate 21 away from the folded edge 22 and extends out of the battery module 10. The lifting hole 212 is provided on the lifting part 213.

[0093] Thus, the lifting section 213 is higher than the battery module 10, making it easier for the lifting tool to pass through the lifting hole 212 during lifting.

[0094] Specifically, in this embodiment, the width of the main connecting plate 21 is approximately equal to the height of the battery cell. The hoisting part 213 extends vertically upward from the top side of the main connecting plate 21. There are two hoisting parts 213, which are respectively located at both ends of the top side of the main connecting plate 21. The height of both hoisting parts 213 exceeds the top surface of the battery module 10. Two hoisting holes 212 are respectively located in the middle of the two hoisting parts 213.

[0095] It should be noted that the top side of the main connecting plate 21, which is located between the two lifting parts 213, does not extend upward, making the top of the main connecting plate 21 U-shaped. This helps to save production materials for the connecting plate 20 and reduce production costs. Furthermore, the top side of the main connecting plate 21 forms a sloping transition with the two lifting parts 213, which helps to avoid tearing at the connection between the lifting part 213 and the main connecting plate 21 during lifting due to stress concentration.

[0096] In some embodiments, the main connecting plate 21 further includes a reinforcing portion 214, which extends outward from the edge of the lifting portion 213 away from the main connecting plate 21 and is folded and attached to the edge of the lifting portion 213 away from the main connecting plate 21.

[0097] In this way, the reinforcement section can further enhance the structural strength of the hoisting section, and the reinforcement section formed by folding is easier to process.

[0098] Specifically, in this embodiment, after the edge of the lifting part 213 extends outward, it folds inward and presses against the lifting part 213 to form a reinforcing part 214, so that the part of the lifting part 213 that is subjected to the greatest force during lifting forms a double-layer folded structure to increase the local strength at this point and prevent the opening of the lifting hole 212 from deforming or tearing during lifting.

[0099] Please see Figure 1 In some embodiments, the battery module 10 further includes a strap 70, which is sleeved on the outside of the plurality of cells 12 and end plates 11 to secure the plurality of cells 12 and end plates 11.

[0100] In this way, by using straps 70 to bind multiple cells 12 and end plates 11, the long bolts that run through the cells 12 and end plates 11 are eliminated, which not only achieves effective constraint and fixation of multiple cells 12, but also reduces the assembly difficulty of the battery module 10.

[0101] Specifically, in the embodiments of this application, the straps 70 are typically made of high-strength, high-yield-strength stainless steel strips (such as 301 / 304 stainless steel) or carbon steel strips with surface coating. When assembling the battery module 10, multiple battery cells 12 are first stacked into a group, end plates 11 are placed on both sides, and then at least two (usually multiple, such as upper and lower layers) straps 70 are wrapped around the periphery of the multiple battery cells 12 and the end plates 11.

[0102] In this embodiment, the end plate 11 is further provided with a slot 111 corresponding to the position of the strap 70. When the strap 70 is installed on the battery module 10, at least a portion of the strap 70 is located in the slot 111. This prevents the strap 70 from shifting due to external forces.

[0103] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0104] 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0105] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module kit, characterized in that, include: A battery module, the battery module comprising two end plates and multiple battery cells stacked and fixed between the two end plates; A connecting plate, comprising a main connecting plate and a folded edge, wherein the main connecting plate is configured to be fixed to the side of the end plate away from the battery cell by fasteners passing through it along the thickness direction, and the folded edge is configured to be fixed to the electrical equipment by fasteners passing through it along the thickness direction.

2. The battery module kit according to claim 1, characterized in that, The battery module kit also includes an integrated busbar, which includes a bracket and an electrical connector. The electrical connector is injection molded onto the bracket, and the bracket covers the battery module and is connected to the end plate. The electrical connector is electrically connected to the electrodes of the battery cell.

3. The battery module kit according to claim 2, characterized in that, The electrical connector includes a series aluminum busbar and a data acquisition board. The series aluminum busbar is electrically connected to the electrodes of the battery cell, and the data acquisition board is electrically connected to the series aluminum busbar connected to the battery cells of the same battery module.

4. The battery module kit according to claim 3, characterized in that, The battery module kit also includes foam, which is disposed between the acquisition board and the battery cell.

5. The battery module kit according to claim 2, characterized in that, The battery modules are multiple, and the electrical connectors also include module connecting aluminum busbars. The module connecting aluminum busbars are mounted on the bracket, and the multiple battery modules are electrically connected through the module connecting aluminum busbars.

6. The battery module kit according to claim 2, characterized in that, The battery module also includes a fixing block, which is mounted on the end plate. The fixing block has a blind hole, and a nut is embedded in the blind hole. The electrical connector includes an output aluminum busbar that connects the total positive or total negative of the battery module. The output aluminum busbar is connected to the nut by screws to be fixed on the fixing block.

7. The battery module kit according to claim 6, characterized in that, The fixing block also includes a mounting through hole, which is a countersunk hole, and the fixing block is fixed to the end plate by fasteners passing through the mounting through hole.

8. The battery module kit according to claim 2, characterized in that, The battery module kit also includes an insulating film, which is attached to the side of the integrated busbar away from the battery module.

9. The battery module kit according to claim 1, characterized in that, The width of the folded edge is 10%-20% of the width of the main connecting plate.

10. The battery module kit according to claim 1, characterized in that, The connecting plate is provided with two lifting holes, which are spaced apart.

11. The battery module kit according to claim 10, characterized in that, The main connecting plate is provided with a lifting part on the side away from the folded edge. The lifting part extends from the edge of the main connecting plate away from the folded edge and extends out of the battery module. The lifting hole is provided on the lifting part.

12. The battery module kit according to claim 11, characterized in that, The main connecting plate also includes a reinforcing part, which extends outward from the edge of the hoisting part away from the main connecting plate and is folded and attached to the edge of the hoisting part away from the main connecting plate.

13. The battery module kit according to claim 1, characterized in that, The battery module also includes straps that are fitted over the outside of the plurality of battery cells and the end plate to secure the plurality of battery cells and the end plate.

Images