Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack. The battery module comprises a plurality of battery cells, an end plate, a pole seat assembly and an output piece, the plurality of battery cells are arranged along the thickness direction to form a battery pack; the end plates are arranged at two opposite ends of the battery pack; the electrode base assembly is connected with the end plate, and a first connecting hole is formed in the base assembly in the thickness direction of the battery cell; the output piece is electrically connected with the battery pack, a second connecting hole is formed in the output piece in the thickness direction of the battery cell, the output piece is electrically connected with the pole base assembly, and the first connecting hole is communicated with the second connecting hole. According to the utility model, by optimizing the structural design of the battery module, the problem that the electrical connection needs to occupy the space in the height direction of the battery cell is solved, and the electrical connection between the battery modules can be completed without occupying the space in the height direction of the battery cell, so that the space utilization rate, the assembly convenience and the reliability of the battery pack are improved; and an expected technical effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of battery modules, and in particular to a battery module and battery pack. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage equipment, and other fields, higher requirements are being placed on the energy density, space utilization, and assembly efficiency of battery modules. As the core component of a battery system, a battery module typically consists of multiple cells, end plates, electrode assemblies, and output components. In existing technologies, multiple cells are arranged along their thickness to form a battery pack, with end plates providing mechanical restraint and protection. The electrode assemblies and output components are used to achieve electrical connections between cells and between battery modules.

[0003] In existing battery module structures, electrical connections between cells or between battery modules typically require reserved installation space along the height of the cells. For example, output components or busbars often need to be located at the top or bottom of the cells and connected to the terminal assembly via bolts, welding, or other methods. While this structure enables electrical connections, the space occupied by the connection structure along the height of the cells increases the overall thickness of the battery module, reducing the space utilization rate of the battery pack. Furthermore, the assembly and maintenance of electrical connection components are relatively complex, potentially affecting the assembly efficiency and reliability of the module.

[0004] Therefore, how to further improve the space utilization of battery packs while ensuring reliable electrical connections has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a battery module and battery pack to solve the problem of low space utilization in battery packs.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a battery module includes multiple battery cells, end plates, electrode assemblies, and output components; multiple battery cells are arranged along their thickness direction to form a battery pack; end plates are disposed at opposite ends of the battery pack; the electrode assemblies are connected to the end plates, and a first connection hole is provided in the electrode assemblies along the thickness direction of the battery cells; the output components are electrically connected to the battery pack, and a second connection hole is provided in the output components along the thickness direction of the battery cells; the output components and the electrode assemblies are electrically connected, and the first connection hole and the second connection hole are connected.

[0007] Optionally, the electrode assembly includes a fixed base and an electrode post. The end plate has a mounting groove, the fixed base is assembled in the mounting groove and detachably connected to the end plate, the electrode post is assembled in the fixed base, the electrode post has a first connection hole, and the electrode post and the output component are electrically connected.

[0008] Optionally, the mounting groove extends through the end plate along the thickness direction of the battery cell. The end plate includes a baffle, which is disposed on the side wall of the mounting groove. The baffle and the bottom wall of the mounting groove form a slide rail, and a portion of the fixing seat is inserted into the slide rail and slides in cooperation with the slide rail.

[0009] Optionally, one of the end plate and the fixing seat is provided with a slot, and the other of the end plate and the fixing seat is provided with a protrusion, which is inserted into the slot.

[0010] Optionally, the fixing seat includes a main body and a fixing part. The main body is provided with a notch. One end of the fixing part is connected to the notch of the main body, and the other end of the fixing part is in a free state and elastically abuts against the mounting groove.

[0011] Optionally, the battery module also includes a metal strip, around which the battery pack and end plate are wound;

[0012] The mounting base includes an extension plate, which is connected to the main body, and a metal strip is disposed between the extension plate and the end plate.

[0013] Optionally, the mounting base also includes a surrounding plate, which is connected to the main body. The surrounding plate and the main body form a limiting groove, and a portion of the output component is assembled in the limiting groove and bent to be electrically connected to the pole post.

[0014] Optionally, the main body located at the limiting groove is provided with multiple material reduction grooves.

[0015] Optionally, the width of the mounting slot gradually increases in the direction away from the battery cell.

[0016] To achieve the above objectives, the present invention provides a solution in which: the battery pack includes electrical components and a plurality of battery modules as described above, wherein the electrical components pass through the first connecting hole and the second connecting hole respectively, and are electrically connected to the terminal assembly and the output component respectively.

[0017] The beneficial effects of this invention are as follows: First, the electrical connection operations of traditional battery modules often require space along the height of the battery cell, resulting in insufficient compactness of the overall battery pack structure and affecting the integration density and space utilization of the battery pack. To address this technical problem, this solution arranges the connection holes of the terminal assembly and output components along the thickness direction of the battery cell and connects them to the end plate. This allows for bolt fastening operations from the side of the end plate when the battery module is assembled into the battery pack, achieving efficient electrical connection between different battery modules. Thus, there is no need to reserve extra space in the height direction of the battery cell for connection operations, significantly improving space utilization efficiency.

[0018] Secondly, the aforementioned structural design allows for more flexible operating space during assembly and maintenance, facilitating automated assembly and subsequent repairs, effectively improving production efficiency and product reliability. Simultaneously, the rational layout of the battery module's end plate structure, terminal assembly, and output components enhances the overall mechanical strength and stability of the module, reducing the risk of damage to electrical connection points.

[0019] In summary, this technical solution, by optimizing the structural design of the battery module, solves the problem that electrical connections require space in the height direction of the battery cells, and enables electrical connections between battery modules to be completed without occupying space in the height direction of the battery cells. This improves the space utilization, assembly convenience, and reliability of the battery pack, achieving the expected technical effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0022] Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A schematic diagram of the cross-section along the II-II direction;

[0023] Figure 3 This is provided by the embodiment of the present utility model. Figure 2 Enlarged view of region A in the middle;

[0024] Figure 4 This is a structural schematic diagram of the pole base assembly and output component provided in this embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the pole mount assembly provided in this embodiment of the utility model;

[0026] Figure 6 This is provided by the embodiment of the present utility model. Figure 1 A schematic diagram of the cross-section along the VI-VI direction;

[0027] Figure 7 This is provided by the embodiment of the present utility model. Figure 6 A magnified view of region B in the middle.

[0028] Explanation of icon numbers:

[0029] Cell 10, end plate 20, mounting slot 21, baffle 22, card slot 23, electrode assembly 30

[0030] First connecting hole 301, fixing base 31, latching protrusion 311, main body 312, fixing part 313

[0031] Notch 314, extension plate 315, enclosure plate 316, limiting groove 317, material reduction groove 318

[0032] 32 pole post, 40 output component, 401 second connection hole, 50 metal strip. Detailed Implementation

[0033] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, clearly and comprehensively demonstrating the technical solution. It should be noted that the listed embodiments are only a part of this utility model, and not all possible implementations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] Please see Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the battery module provided in an embodiment of the present invention. Figure 2 This is provided by the embodiment of the present utility model. Figure 1 Schematic diagram of the cross section in the II-II direction. Figure 3 This is provided by the embodiment of the present utility model. Figure 2 Enlarged diagram of region A in the middle. Figure 4 This is a schematic diagram of the structure of the pole base assembly 30 and the output component 40 provided in this embodiment of the utility model. Figure 5 This is a schematic diagram of the structure of the pole base assembly 30 provided in this embodiment of the utility model.

[0035] This utility model relates to a battery module, which includes multiple battery cells 10, an end plate 20, a terminal assembly 30, and an output component 40. These components work together to achieve efficient and stable operation of the battery module. Specifically, the multiple battery cells 10 are arranged along their thickness direction and tightly assembled together to form a battery pack. This arrangement not only ensures good contact between the battery cells 10 but also improves the overall energy density of the battery pack.

[0036] The electrode assembly 30 and the end plate 20 are connected via a precise connection method, ensuring a stable and reliable electrical connection between the cell 10 and the electrode assembly 30. A first connection hole 301 is formed in the thickness direction of the cell 10 on the electrode assembly 30. This connection hole is designed to match the second connection hole 401 on the output component 40, thereby achieving an electrical connection between the cell 10 and the output component 40. The output component 40, as an important component of the battery module, is electrically connected to the battery pack and also has a second connection hole 401 formed in the thickness direction of the cell 10. The electrical connection between the output component 40 and the electrode assembly 30 enables the battery module to output electrical energy normally.

[0037] The first connecting hole 301 and the second connecting hole 401 are both arranged along the thickness direction of the cell 10. This design not only makes the battery module easier to assemble, but also improves the space utilization of the battery module. When the battery module is assembled into the battery pack, bolts can be used on the side of the end plate 20 to electrically connect different battery modules together.

[0038] In this embodiment, firstly, the electrical connection operations of traditional battery modules often require space in the height direction of the cell 10, resulting in insufficient overall compactness of the battery pack structure and affecting the integration density and space utilization of the battery pack. To address this technical problem, this solution arranges the connection holes of the electrode assembly 30 and the output component 40 along the thickness direction of the cell 10 and connects them to the end plate 20. This allows for bolt fastening operations from the side of the end plate 20 when the battery module is assembled into the battery pack, achieving efficient electrical connection of different battery modules. In this way, there is no need to reserve extra space in the height direction of the cell 10 for connection operations, significantly improving space utilization efficiency.

[0039] Secondly, the aforementioned structural design allows for more flexible operating space during assembly and maintenance, facilitating automated assembly and subsequent repairs, effectively improving production efficiency and product reliability. Simultaneously, the rational layout of the battery module's end plate 20 structure, electrode assembly 30, and output component 40 enhances the overall mechanical strength and stability of the module, reducing the risk of damage to electrical connection points.

[0040] In summary, this technical solution, by optimizing the structural design of the battery module, solves the problem that electrical connections require space in the height direction of the battery cell 10, and enables electrical connections between battery modules to be completed without occupying space in the height direction of the battery cell 10. This improves the space utilization, assembly convenience, and reliability of the battery pack, achieving the expected technical effect.

[0041] The electrode assembly 30 includes a mounting base 31 and an electrode post 32. Mounting slots 21 are specially designed on the end plate 20, providing space for the mounting base 31. The mounting base 31 can be precisely fitted into these mounting slots 21, and a detachable connection is achieved between it and the end plate 20 for easy maintenance and replacement. The electrode post 32 is assembled inside the mounting base 31, not only securely fixed within it, but also featuring a first connection hole 301. These connection holes allow the electrode post 32 to be electrically connected to the output component 40, ensuring smooth current transmission.

[0042] First, by providing a mounting groove 21 on the end plate 20 and assembling the fixing seat 31 of the electrode assembly 30 into the mounting groove 21 with a detachable connection, the electrode assembly 30 can be easily installed or removed. This eliminates the need for damage to the overall structure of the end plate 20 or complex operations during the production, maintenance, or replacement of the battery module, greatly improving the convenience of assembly and maintenance, reducing subsequent repair costs, and enhancing the maintainability and lifespan of the module.

[0043] Secondly, the terminal post 32, as a conductive connecting element of the terminal assembly 30, is assembled in the fixing base 31, and a first connecting hole 301 is provided on the terminal post 32, enabling electrical connection between the terminal post 32 and the output component 40. This structural design ensures stable and efficient current conduction from the cell 10 to the output component 40, guaranteeing reliable electrical connection of the battery module and improving electrical performance. Simultaneously, the first connecting hole 301 facilitates subsequent electrical connections, testing, or wiring operations, contributing to improved assembly efficiency and safety.

[0044] In summary, this technical solution solves the technical problems of inconvenient assembly and maintenance and low electrical connection efficiency of traditional battery module electrode assembly 30 by cooperating with the detachable fixing seat 31 of the electrode assembly 30 and the end plate 20, as well as the reasonable layout and connection hole design of the electrode post 32. It achieves the technical effects of easy assembly and maintenance of electrode assembly 30, reliable and efficient electrical connection, thereby improving the overall performance and application value of battery module.

[0045] An end plate 20 is provided through the mounting groove 21 along the thickness direction of the battery cell 10, and the end plate 20 includes a baffle 22. This baffle 22 is carefully designed and disposed on the side wall of the mounting groove 21, forming a slide rail together with the bottom wall of the mounting groove 21. A portion of the fixing seat 31 is inserted into this slide rail and can slide with the slide rail. The function of the baffle 22 is to restrict the movement of the fixing seat 31 in the height direction of the battery cell 10, while the slide rail allows the fixing seat 31 to move freely in the thickness direction of the battery cell 10.

[0046] First, by extending the mounting groove 21 through the end plate 20 along the thickness direction of the cell 10, the electrode assembly 30 can be inserted and moved in the thickness direction of the cell 10, providing a spatial basis for subsequent assembly and adjustment.

[0047] Secondly, the baffle 22 on the end plate 20 is located on the side wall of the mounting groove 21 and forms a slide rail together with the bottom wall of the mounting groove 21. Part of the fixing seat 31 is inserted into the slide rail and slides with the slide rail. Specifically, the slide rail structure allows the fixing seat 31 to slide freely in the thickness direction of the cell 10, so that the electrode assembly 30 can automatically adjust its position according to the actual size of the cell 10, fully absorb and compensate for the dimensional errors of multiple cells 10 during the assembly process, effectively avoid assembly jamming, stress concentration and other problems caused by the accumulation of dimensional tolerances, and improve the flexibility and compatibility of assembly.

[0048] Meanwhile, the baffle 22 restricts the movement of the fixing seat 31 in the height direction of the battery cell 10, ensuring that the electrode assembly 30 will not be displaced or shaken in the vertical direction during assembly and use, thereby ensuring the stability and safety of the electrode assembly 30 and preventing structural loosening or failure caused by vibration or impact.

[0049] Based on the above structural design, this technical solution cleverly utilizes the dimensional compensation capability of the slide rail in the thickness direction and the limiting function of the baffle 22 in the height direction to solve the assembly problem of the electrode assembly 30 caused by the dimensional error of the cell 10, and realizes the adaptive positioning and stable assembly of the electrode assembly 30, thereby improving the assembly efficiency, structural reliability and applicability of the battery module.

[0050] Furthermore, the width of the mounting groove 21 gradually increases in the direction away from the battery cell 10. Firstly, by gradually increasing the width of the mounting groove 21 in the direction away from the battery cell 10, a funnel-like guiding structure is formed, effectively expanding the insertion range for component assembly. This structure can automatically correct and guide the electrode assembly 30 when it is inserted into the mounting groove 21, reducing jamming and interference caused by positional deviations, thereby significantly improving the smoothness and efficiency of electrode assembly 30 assembly.

[0051] Secondly, the mounting groove 21 with its increasing width can adaptively guide components such as the fixing seat 31 into place, reducing stress concentration during assembly, avoiding surface damage, deformation, or structural failure of components caused by forced assembly, and improving the reliability and service life of the product.

[0052] Furthermore, the gradually widening mounting slot 21 facilitates the subsequent disassembly of the terminal assembly 30. When maintenance or replacement is required, the terminal assembly 30 can be smoothly removed from the mounting slot 21, reducing resistance and the risk of damage during disassembly and significantly improving the maintainability of the battery module.

[0053] In summary, this technical solution solves the problems of difficult assembly and positioning and easy damage of the electrode assembly 30 by setting the mounting groove 21 with a gradually increasing width away from the battery cell 10. It achieves technical effects such as rapid guided assembly, smooth transition positioning and convenient disassembly between the electrode assembly 30 and the mounting groove 21, and further improves the process level of battery module assembly and the overall performance of the product.

[0054] In this design, the end plate 20 and the fixing base 31 have ingenious structural designs. One component is designed with a slot 23, while the other component is correspondingly provided with a protrusion 311. This design allows the protrusion 311 to be easily inserted into the slot 23, thereby achieving the initial connection between the two components. After the fixing base 31 is slid and fitted into the slide rail, a tight fit is formed between the protrusion 311 and the slot 23. This fit not only ensures the stability of the connection but also allows for detachable fixing between the end plate 20 and the fixing base 31.

[0055] First, by providing a slot 23 and a protrusion 311 in the end plate 20 and the fixing seat 31 respectively, and utilizing the structure of the protrusion 311 being inserted into the slot 23, the fixing seat 31 can be quickly and accurately positioned and fixed with the end plate 20 after sliding along the slide to the predetermined position. This structure eliminates the need for complex bolt tightening or welding processes, simplifying the assembly process and improving assembly efficiency.

[0056] Secondly, the engagement between the protrusion 311 and the slot 23 has a self-locking function, which effectively prevents the fixing seat 31 from loosening or falling off during use, significantly improving the stability and reliability of the connection between the electrode assembly 30 and the end plate 20. At the same time, this structure has good vibration resistance and is suitable for various vibration environments that the battery module may encounter during transportation and use.

[0057] Furthermore, this technical solution enables a detachable connection between the end plate 20 and the mounting base 31. Users can easily remove the electrode assembly 30 from the end plate 20 through simple sliding and plugging operations, which greatly facilitates subsequent maintenance, replacement, and upgrades, reduces maintenance costs, and improves the maintainability and service life of the battery module.

[0058] In summary, this technical solution solves the technical problems of cumbersome assembly operation, unreliable fixation, and inconvenient maintenance of the electrode assembly 30 by using the cooperation of the slot 23 and the protrusion 311. It achieves the technical effects of rapid assembly, stable connection, and convenient disassembly of the electrode assembly 30 and the end plate 20, thereby improving the assembly process level and reliability of the battery module.

[0059] This invention relates to the design of a fixing base 31, which mainly consists of two parts: a main body 312 and a fixing part 313. The main body 312 is specially designed with a notch 314 for connecting the fixing part 313. One end of the fixing part 313 is tightly connected to the notch 314 of the main body 312, while the other end of the fixing part 313 remains free. This free end design allows the fixing part 313 to form an elastic abutment relationship with the mounting groove 21. Through this elastic abutment, the fixing part 313 can generate frictional force with the groove wall of the mounting groove 21, thereby achieving a connection that is both stable and detachable.

[0060] First, the fixing base 31 includes a main body 312 and a fixing part 313. By providing a notch 314 in the main body 312 and connecting one end of the fixing part 313 to the notch 314, while leaving the other end of the fixing part 313 free, this structural design enables the fixing part 313 to have elastic deformation capability. During assembly, the free end of the fixing part 313 can actively adapt to the dimensional tolerances of the mounting groove 21, automatically compensating for machining and assembly errors through elastic deformation, thereby improving the adaptability and versatility of the structure.

[0061] Secondly, the free end of the fixing part 313 elastically abuts against the wall of the mounting groove 21. Through the combined action of elastic force and friction, a detachable connection is achieved between the fixing seat 31 and the mounting groove 21. This structure eliminates the need for additional fasteners such as screws and clips, greatly simplifying the assembly process and making assembly and disassembly operations more convenient and efficient, significantly improving production efficiency.

[0062] Furthermore, the friction-based connection method ensures that the mounting base 31 is firmly positioned after assembly, preventing loosening or detachment due to vibration or external force, thus improving the overall structural stability and safety. Simultaneously, this structure facilitates repeated disassembly and replacement of the electrode assembly 30, simplifying later maintenance and repair, reducing maintenance costs, and extending the battery module's lifespan.

[0063] In summary, this technical solution achieves a detachable connection through elastic support and friction, cleverly solving the problems of complex assembly, poor adaptability, and inconvenient disassembly of the electrode base assembly 30 in the prior art. It realizes the technical effects of efficient assembly, stable connection, and convenient disassembly between the electrode base assembly 30 and the mounting groove 21, thereby improving the assembly process level and product reliability of the battery module.

[0064] The mounting base 31 also includes a surrounding plate 316, which is connected to the main body 312. The surrounding plate 316 and the main body 312 form a limiting groove 317. Part of the output component 40 is assembled in the limiting groove 317 and bent to be electrically connected to the pole post 32. First, the mounting base 31 adds a surrounding plate 316 and connects it to the main body 312. The two form a limiting groove 317, which provides a clear assembly space and guiding area for the output component 40. After the output component 40 is assembled in the limiting groove 317, it can be effectively limited, preventing axial or radial displacement or loosening during assembly and subsequent use. Structurally, this ensures the stability and positioning accuracy of the output component 40, and solves problems such as poor contact caused by the non-fixed position of the output component 40.

[0065] Secondly, the presence of the limiting groove 317 allows the output component 40 to be bent precisely within the groove. After bending, the output component 40 is directly electrically connected to the pole post 32, ensuring the reliability and consistency of the connection, reducing the connection resistance, and effectively improving the conductivity between the pole post 32 and the output component 40. This solves the problem of decreased electrical performance caused by the small contact area or loose contact between the output component 40 and the pole post 32 in traditional structures.

[0066] Furthermore, this structure simplifies the assembly and positioning of the output component 40, improves the assembly efficiency and consistency of the pole mount assembly 30, reduces errors caused by manual operation, and enhances the standardization of the production process. At the same time, the limiting structure facilitates subsequent maintenance and inspection, improving the maintainability of the overall module.

[0067] In summary, this technical solution effectively solves the technical problems of inaccurate assembly positioning, easy loosening, or poor contact of the output component 40 by setting a surrounding plate 316 in the fixed base 31 and forming a limiting groove 317 with the main body 312. It achieves the technical effects of accurate positioning, stable limiting, and reliable electrical connection of the output component 40, and significantly improves the structural reliability, assembly efficiency, and electrical performance of the pole base assembly 30.

[0068] Furthermore, to ensure structural stability and functional reliability, multiple material reduction grooves 318 are specially designed on the main body 312 located in the limiting groove 317. These material reduction grooves 318 serve a significant purpose: they effectively prevent the portion of the main body 312 located in the limiting groove 317 from becoming excessively thick, thus avoiding deformation caused by excessive material thickness. Such deformation not only affects the overall aesthetics of the component but, more importantly, hinders the fit between the output component 40 and the main body 312, thereby impacting the overall operating efficiency and service life of the equipment. By creating the material reduction grooves 318, stress concentration in the limiting groove 317 area of ​​the main body 312 can be reduced, ensuring the flatness of the limiting groove 317. This flatness is crucial for a tight fit between the output component 40 and the main body 312, ensuring the accuracy and stability of the equipment during operation, ultimately guaranteeing product quality and performance.

[0069] Please see Figure 6 and Figure 7 As shown, Figure 6 This is provided by the embodiment of the present utility model. Figure 1 A cross-sectional diagram along the VI-VI direction. Figure 7 This is provided by the embodiment of the present utility model. Figure 6 A magnified view of region B in the middle.

[0070] The battery module also includes a metal strip 50, which wraps around the battery pack and end plate 20, binding the battery pack and end plate 20 into a whole. The mounting base 31 includes an extension plate 315, which is connected to the main body 312. The metal strip 50 is disposed between the extension plate 315 and the end plate 20. The end plate 20 can increase the creepage distance between the terminal post 32 and the metal strip 50 to prevent the terminal post 32 and the metal strip 50 from conducting electricity.

[0071] First, by adding an extension plate 315 to the mounting base 31 and connecting the extension plate 315 to the main body 312, the metal strip 50 can be effectively confined between the extension plate 315 and the end plate 20. This structure not only facilitates the installation and fixation of the metal strip 50, but also ensures that the metal strip 50 is always in a controlled spatial position, preventing the metal strip 50 from shifting during assembly or transportation, thus improving the stability of the battery module structure.

[0072] Secondly, the end plate 20 significantly increases the creepage distance between the terminal post 32 and the metal strip 50. This increased creepage distance effectively prevents electrical safety hazards such as leakage and short circuits between the terminal post 32 and the metal strip 50. Especially in high-voltage battery systems, it greatly improves the module's insulation performance and operational safety, resolving the electrical safety risks caused by the compact space constraints in traditional structures.

[0073] Furthermore, the metal strip 50 binds the battery pack and the end plate 20, forming a solid integral structure that effectively improves the mechanical strength and impact resistance of the module. This prevents the battery pack from becoming loose or shifting during handling, vibration, or impact, ensuring the structural integrity and reliability of the battery module.

[0074] In summary, this technical solution, by setting up an extension plate 315 and optimizing the fit between the metal strip 50 and the end plate 20, and by using the end plate 20 to increase the creepage distance between the terminal post 32 and the metal strip 50, successfully solves the technical problems of insufficient creepage distance, easy short circuit, and loose assembly between the metal strip 50 and the terminal post 32. It achieves the technical effects of stable battery module structure, firm assembly, and improved insulation safety, and significantly improves the overall reliability and safety performance of the battery module.

[0075] The invention disclosed in this application aims to provide a battery pack with a unique structure and function. Specifically, the battery pack includes a series of electrical components and multiple battery modules, which can be of the type described in any embodiment of this application. The electrical components play a crucial role in the battery pack, achieving electrical connection with the terminal assembly 30 inside the battery module through a first connection hole 301 and a second connection hole 401 on the battery module. Furthermore, the electrical components are also electrically connected to the output component 40 of the battery pack, ensuring that the battery pack can effectively output electrical energy. This design not only improves the performance of the battery pack but also enhances its applicability and reliability in various application scenarios. The electrical components can be screws, rivets, or other similar parts.

[0076] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0077] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0078] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0079] 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. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery module, characterized in that, The battery module includes: Multiple battery cells are arranged along their thickness direction to form a battery pack; End plates are disposed at opposite ends of the battery pack; A base assembly, connected to the end plate, has a first connection hole in the thickness direction of the battery cell; and An output component is electrically connected to the battery pack. In the thickness direction of the battery cell, the output component has a second connection hole. The output component and the base assembly are electrically connected, and the first connection hole and the second connection hole are connected.

2. The battery module according to claim 1, characterized in that, The base assembly includes a fixed base and a pole post. The end plate has a mounting groove. The fixed base is assembled in the mounting groove and detachably connected to the end plate. The pole post is assembled in the fixed base. The pole post has the first connection hole. The pole post and the output component are electrically connected.

3. The battery module according to claim 2, characterized in that, The mounting groove extends through the end plate along the thickness direction of the battery cell. The end plate includes a baffle, which is disposed on the side wall of the mounting groove. The baffle and the bottom wall of the mounting groove form a slide rail, and part of the fixing seat is inserted into the slide rail and slides in cooperation with the slide rail.

4. The battery module according to claim 3, characterized in that, One of the end plate and the fixing seat is provided with a slot, and the other of the end plate and the fixing seat is provided with a protrusion, which is inserted into the slot.

5. The battery module according to claim 2, characterized in that, The fixing base includes a main body and a fixing part. The main body is provided with a notch. One end of the fixing part is connected to the notch of the main body. The other end of the fixing part is in a free state and elastically abuts against the mounting groove.

6. The battery module according to claim 5, characterized in that, The battery module also includes a metal strip, which is wound around the battery pack and the end plate; The mounting base includes an extension plate, which is connected to the main body, and the metal strip is disposed between the extension plate and the end plate.

7. The battery module according to claim 5, characterized in that, The fixing base also includes a surrounding plate, which is connected to the main body. The surrounding plate and the main body form a limiting groove, and part of the output component is assembled in the limiting groove and bent to be electrically connected to the pole post.

8. The battery module according to claim 7, characterized in that, The main body located at the limiting groove is provided with multiple material reduction grooves.

9. The battery module according to claim 2, characterized in that, The width of the mounting groove gradually increases in the direction away from the battery cell.

10. A battery pack, characterized in that, The battery pack includes electrical components and a plurality of battery modules as described in any one of claims 1 to 9, wherein the electrical components pass through the first connection hole and the second connection hole respectively, and are electrically connected to the base assembly and the output component respectively.

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