Battery module and electronic equipment

Abstract

The utility model provides a battery module and electronic equipment, the battery module comprises a plurality of single cells, a plurality of brackets and fasteners, the plurality of single cells are arranged on the brackets, the plurality of brackets are stacked along a first direction, and the brackets are provided with mounting holes extending along the first direction; the fastening piece comprises a fixing rod and two locking pieces, the fixing rod penetrates through the mounting holes in the first direction so as to connect the multiple supports in series, and the two locking pieces are connected to the two ends of the fixing rod respectively and abut against the supports so as to limit movement of the supports in the first direction; the fixing rod is provided with an outer side face adjacent to the mounting hole, the outer side face is provided with a limiting part, a clamping part is arranged at the corresponding position of the mounting hole, and the limiting part is matched with the clamping part so as to limit rotation of the fixing rod in the mounting hole. The firmness of the battery module can be ensured, and the battery module is high in universality and suitable for batteries of all heights.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery module and electronic device. Background Technology

[0002] In recent years, with the vigorous development of new energy sources, lithium batteries have become increasingly popular for energy conservation, emission reduction, and low-carbon living. Lithium batteries can be classified into cylindrical lithium-ion batteries, pouch lithium-ion batteries, and prismatic lithium-ion batteries based on their cell type. Cylindrical lithium-ion battery modules are composed of several stacked battery modules. Long screws matching the height of the battery modules are used as fasteners to connect and fix multiple battery modules in series to ensure the module's stability.

[0003] While existing fasteners consisting of screws and nuts can be used to secure battery modules, the screw is prone to slipping when the nut is tightened onto it, requiring the use of clamps to hold the screw in place, which inconveniences the assembly of the battery modules. Utility Model Content

[0004] This utility model provides a battery module and electronic device to solve the problem of slippage of fasteners used in battery modules of different heights in related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] In a first aspect, this utility model provides a battery module, including multiple individual battery cells, multiple brackets and fasteners, wherein the multiple individual battery cells are disposed on the brackets, the multiple brackets are stacked along a first direction, and the brackets have mounting holes extending along the first direction;

[0007] The fastener includes a fixing rod and two locking members. The fixing rod passes through the mounting hole along the first direction to connect multiple brackets in series. The two locking members are respectively connected to both ends of the fixing rod and abut against the brackets to limit the movement of the brackets along the first direction.

[0008] The fixing rod has an outer side adjacent to the mounting hole. The outer side is provided with a limiting part, and a corresponding position on the mounting hole is provided with a snap-fit ​​part. The limiting part cooperates with the snap-fit ​​part to limit the rotation of the fixing rod in the mounting hole.

[0009] Optionally, the fixing rod has threaded holes at both ends, the surface of the threaded holes has internal threads, the locking member includes a threaded rod and a stud head connected coaxially, the surface of the threaded rod has external threads, the threaded rod is inserted into the threaded hole, the external threads engage with the internal threads, and the stud head is exposed in the mounting hole and abuts against the bracket.

[0010] Optionally, the outer diameter of the column head is larger than the diameter of the mounting hole.

[0011] Optionally, the dimension of the fixing rod along the first direction is L1, and the dimension of the mounting hole along the first direction is L2, wherein L1 < L2.

[0012] Optionally, the limiting portion extends from one end of the fixing rod to the other end along the first direction, and the snap-fit ​​portion extends from one end of the mounting hole to the other end along the first direction.

[0013] Optionally, the limiting portion protrudes from the outer side, and the snap-fit ​​portion is recessed into the wall of the mounting hole.

[0014] Optionally, the bracket surface has a groove around the mounting hole, the groove being used to receive and abut against the locking member.

[0015] Optionally, the fixing rod and the limiting part are integrally formed.

[0016] Optionally, the locking element is a screw.

[0017] Secondly, embodiments of the present invention also provide an electronic device, including any of the battery modules provided in the first aspect.

[0018] This invention provides a battery module and an electronic device. The battery module has mating fasteners and brackets. The fasteners consist of a fixing rod and locking components connected to both ends of the fixing rod. These fasteners can be used to lock the battery module during assembly, ensuring its stability. The fixing rod has a limiting part on its surface, and the bracket has a snap-fit ​​part in its mounting hole that mates with the limiting part. The limiting part is fixed in the snap-fit ​​part, which restricts the sliding of the fixing rod relative to the mounting hole during battery module assembly, making assembly easier. Furthermore, the locking components at both ends of the fixing rod are detachable. The length of the fixing rod matches the height of a battery module composed of multiple stacked brackets. For battery modules of different heights, a fixing rod of the corresponding length can be cut, making it highly versatile and applicable to battery modules of all heights without requiring customization based on the battery module's height. Attached Figure Description

[0019] Figure 1 This is an exploded view of a battery module provided in an embodiment of the present invention;

[0020] Figure 2 express Figure 1 A schematic diagram of a fastener in a battery module is shown.

[0021] Figure 3 express Figure 1 A schematic diagram of a bracket in a battery module is shown.

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

[0023] Figure 5 This is a schematic diagram illustrating a battery module provided in an embodiment of the present invention;

[0024] Figure 6 This is an exploded view of a battery module including multiple fasteners provided in an embodiment of the present invention.

[0025] Figure 7 This is a cross-sectional view of a battery module provided in an embodiment of the present invention;

[0026] Figure 8 express Figure 7 A magnified view of part A shown in the middle circle;

[0027] Figure 9 express Figure 7 A magnified view of part B, shown in the middle circle.

[0028] Figure label:

[0029] 100: Battery module; 10: Fastener; 11: Fixing rod; 111: Limiting part; 112: Threaded hole; 12: Locking part; 121: Threaded rod; 122: Column head; 20: Bracket; 21: Mounting hole; 211: Snap-fit ​​part; 30: Single battery cell. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0032] For cylindrical battery cell modules, multiple supports 20 are typically stacked to form a battery module 100. Multiple individual battery cells 30 are housed within battery compartments on the supports 20. The supports 20 also have busbars that connect to the electrodes of each individual battery cell 30, enabling series and parallel connections between the multiple individual battery cells 30. To secure the supports 20 together, mounting holes 21 are provided at corresponding positions along the stacking direction (first direction) of the supports 20, penetrating the entire battery module 100. Fasteners pass through the mounting holes 21 to secure the supports 20 together.

[0033] In existing technology, long screws are mainly used as fasteners 10. One end of this long screw is a fixed screw head, and the other end is a threaded nut or bolt. The diameter of the screw head, nut, and bolt is larger than the diameter of the mounting hole 21, sealing both ends of the mounting hole 21 to achieve a fixing effect. In use, the long screw is inserted into the mounting hole 21, the screw head abuts against the bracket 20, and then the nut or bolt is tightened to the other end of the long screw. Understandably, the size of the end of the long screw with the screw head is larger than the other parts of the screw head, requiring the design of corresponding molds for shaping during the production of the long screw.

[0034] The existing manufacturing process for long screws involves three stages: molding, tail clamping, and thread rolling. Raw materials typically include high-toughness materials such as carbon steel, stainless steel, or aluminum, which are easily deformable and have high crack resistance, facilitating molding. During molding, the shape and size of the long screw are determined by the mold used, thus requiring extremely high mold quality. Strict control of mold cavity dimensional tolerances is essential to ensure the required shape, size, and surface finish of the part. Furthermore, different molds are needed for metal products of different shapes and sizes.

[0035] While this fastener 10 can be used to secure the battery module 100, different lengths of screws are required for battery modules 100 of varying heights. Different molding dies are needed to manufacture screws of different lengths, significantly increasing mold development costs. Furthermore, the nuts or bolts are prone to slippage when tightened onto the screw, requiring clamps for fixation, making assembly inconvenient.

[0036] To solve the above problems, such as Figure 1As shown, this utility model embodiment provides a battery module 100, including multiple individual battery cells 30, multiple brackets 20, and fasteners 10. The multiple individual battery cells 30 are disposed on the brackets 20, and the multiple brackets 20 are stacked along a first direction. The brackets 20 have mounting holes 21 extending along the first direction. The fasteners 10 include a fixing rod 11 and two locking members 12. The fixing rod 11 passes through the mounting hole 21 along the first direction to connect the multiple brackets 20 in series. The two locking members 12 are respectively connected to the two ends of the fixing rod 11 and abut against the brackets 20 to limit the movement of the brackets 20 along the first direction. The fixing rod 11 has an outer surface adjacent to the mounting hole 21, and a limiting part 111 is provided on the outer surface. A corresponding position on the mounting hole 21 is provided with a snap-fit ​​part 211. The limiting part 111 cooperates with the snap-fit ​​part 211 to limit the rotation of the fixing rod 11 in the mounting hole 21.

[0037] In this embodiment, the fastener 10 is divided into two parts: a fixing rod 11 and a locking member 12. The fixing rod 11 is a smooth cylinder with a cross-section of the same size from one end to the other. Therefore, when processing the fastener 10, a metal cylinder of any length can be processed first, and then the metal cylinder can be cut according to the length of the battery module 100. The cutting of the metal cylinder can be carried out using processes such as mechanical cutting, thermal cutting, and water jet cutting. For example, mechanical cutting includes shearing machine cutting, mechanical saw cutting, and stamping cutting, while thermal cutting includes gas cutting, plasma cutting, and laser cutting. A suitable processing technology can be adopted according to the actual production situation to cut the metal cylinder to a length that matches the battery module 100. The fixing rod 11 provided in this embodiment has a simple structure, is easy to produce, and is versatile. A single molding die can be used to accommodate battery modules 100 of different lengths, greatly reducing the additional costs associated with multiple sets of production molds and equipment.

[0038] In practical applications, the fixing rod 11 can be processed and shaped using various processes such as cold heading, rolling, hot forging, cutting, casting, and extrusion. For different manufacturing processes, only one set of molds can be used to manufacture the fixing rods 11 of battery modules 100 of different lengths. Compared with the commonly used long screws, the fastener 10 in this embodiment has a simpler structure and process, which can save the number of molds and reduce production costs.

[0039] Furthermore, such as Figure 2 and Figure 3As shown, a limiting part 111 is also provided on the surface of the fixing rod 11, and a corresponding snap-fit ​​part 211 is provided on the wall of the mounting hole 21 of the bracket 20. The limiting part 111 and the snap-fit ​​part 211 are mutually matched in shape, so that the fixing rod 11 can be snapped into the mounting hole 21 to prevent the fixing rod 11 from slipping in the mounting hole 21 when the locking member 12 and the fixing rod 11 are connected and tightened. In order to facilitate modular production and assembly, the snap-fit ​​part 211 on the mounting hole 21 should be normally provided, extending from one end of the mounting hole 21 to the other end, so that when the fixing rod 11 is inserted into the mounting hole 21, the limiting part 111 can slide smoothly in along the snap-fit ​​part 211.

[0040] It is understandable that the diameter of the fixing rod 11 is not greater than the diameter of the mounting hole 21, and the diameter of the locking member 12 is greater than the diameter of the mounting hole 21 and also greater than the diameter of the fixing rod 11, so as to seal both ends of the mounting hole 21. In this embodiment and the corresponding drawings, a cylindrical fixing rod 11, mounting hole 21 and circular locking member 12 are used as examples for illustration. However, in actual applications, the fixing rod 11, locking member 12 and mounting hole 21 can also be designed with other shapes, as long as the above-mentioned size relationship is met, it will not affect the fastening effect of the fastener 10 on the battery module 100. When the fixing rod 11 has a hexagonal, octagonal or other shapes, it can also play the role of the limiting part 111 to prevent the fixing rod 11 from rotating in the mounting hole 21.

[0041] like Figure 3-5 The diagram illustrates the assembly process of the battery module 100. First, the bracket 20 and individual battery cells 30 are connected and assembled. The assembled brackets 20 are then stacked along a first direction, and the mounting holes 21 of each bracket 20 are aligned, as shown. Figure 6 As shown, the bracket 20 is usually provided with multiple mounting holes 21 for fastening at multiple positions to achieve a better fixing effect. The fixing rod 11 of the fastener 10 is passed through the mounting hole 21, and the limiting part 111 on the fixing rod 11 is locked in the snap-fit ​​part 211 of the bracket 20. Finally, the locking parts 12 are locked at both ends of the fixing rod 11.

[0042] In some alternative embodiments, the fixing rod 11 has threaded holes 112 at both ends, the surface of the threaded holes 112 has internal threads, the locking member 12 includes a threaded rod 121 and a pin 122 coaxially connected, the surface of the threaded rod 121 has external threads, the threaded rod 121 is inserted into the threaded hole 112, the external threads engage with the internal threads, and the pin 122 is exposed in the mounting hole 21 and abuts against the bracket 20.

[0043] like Figures 7-9 As shown, Figure 7 An installation diagram of the fixing rod 11, locking member 12, and mounting hole 21 is provided. Figure 8 and Figure 9Schematic diagrams of the top and bottom of the battery module 100 are provided. The fixing rod 11 and the locking member 12 are threaded together. After cutting the fixing rod 11 to the corresponding length, holes are drilled at both ends of the fixing rod 11 to process threads of a certain depth. Since a limiting part 111 is connected to the outer surface of the fixing rod 11, and the limiting part 111 extends from one end of the mounting hole 21 to the other end in the first direction, processing threads on the outer surface would require cutting and grinding the limiting parts 111 at both ends of the fixing rod 11. Therefore, in this embodiment, internal threads are processed on the fixing rod 11 to simplify the processing procedure.

[0044] Correspondingly, the locking member 12 is machined with external threads. The locking member 12 includes a threaded rod 121 for connecting with the fixing rod 11 and a stud 122 for sealing the mounting hole 21. The threaded rod 121 is machined with external threads that match the internal threads on the surface of the threaded hole 112. The outer diameter of the stud 122 is larger than the diameter of the mounting hole 21. When tightening, the fixing rod 11 is inserted into the mounting hole 21, with both ends of the fixing rod 11 approximately flush with the surface of the mounting hole 21. The threaded rod 121 of the locking member 12 is inserted into the threaded holes 112 at both ends of the fixing rod 11. The stud 122 is rotated to tighten the locking member 12 and the fixing rod 11. The stud 122 protrudes from the mounting hole 21 and abuts against the bracket 20.

[0045] In some alternative embodiments, the locking element 12 is a screw.

[0046] The locking component 12 can be a commercially available screw. The corresponding threaded hole 112 is machined on the fixing rod 11 at the position where the locking component 12 is connected, according to the model of the locking component 12. There is no need to produce a special locking component 12 separately.

[0047] Optionally, the dimension of the fixing rod 11 along the first direction is L1, and the dimension of the mounting hole 21 along the first direction is L2, wherein L1 < L2.

[0048] Specifically, the fixing rod 11 is about 1 mm shorter than the mounting hole 21. After the locking member 12 is tightened in the threaded hole 112 on the fixing rod 11, the actual distance between the locking members 12 at both ends is slightly less than the length of the mounting hole 21, which will exert a certain amount of pressure on the bracket 20, making the connection between each bracket 20 tighter.

[0049] In some alternative embodiments, the fixing rod 11 is an aluminum rod made using an aluminum extrusion process.

[0050] Aluminum extrusion, or aluminum extrusion molding, is a method of plastically processing aluminum materials. By applying strong pressure to an aluminum billet placed in a die cavity (or extrusion cylinder), the billet is forced to undergo directional plastic deformation and be extruded from the die orifice, thereby obtaining a part or semi-finished product with the desired cross-sectional shape, size, and certain mechanical properties. Aluminum extrusion is simple to operate, highly efficient, and can rapidly produce large quantities of products, improving production efficiency and economic benefits. In this embodiment, the fixing rod 11 has the same cross-sectional shape and size, and its shape is relatively simple; only its length needs to be cut as required, making it very suitable for manufacturing fasteners using aluminum extrusion.

[0051] Optionally, the fastener can also be a hollow aluminum tube. Under pressure, the aluminum ingot may be divided into several streams of metal, which enter the welding chamber through the diversion hole. There, they are re-welded under high temperature, high pressure, and high vacuum conditions, and finally flow out through the gap between the mold core and the mold hole, forming a tube or hollow profile that meets the dimensional and performance requirements. The drilling step is unnecessary; threads can be directly machined at both ends of the aluminum tube.

[0052] Preferably, the limiting part 111 extends from one end of the fixing rod 11 to the other end along the first direction, and the snap-fit ​​part 211 extends from one end of the mounting hole 21 to the other end along the first direction.

[0053] Since the fixing rod 11 needs to be cut according to the length of the battery module 100, the length of the fixing rod 11 cannot be determined during manufacturing. If the limiting part 111 is only partially provided on the outer side, when the length is short, there may be a problem that the limiting part 111 is not cut to the correct length, thus failing to prevent slippage. Figure 2 As shown, in this embodiment, a limiting part 111 is provided along the entire length of the fixing rod 11 in the first direction. Furthermore, due to the limitations of the aluminum extrusion process, the limiting part 111 must also extend along the extrusion direction of the metal material, i.e., the first direction.

[0054] Of course, when using other processes to manufacture the fixing rod 11, the limiting part 111 can be set only in a local position, which can still play the role of preventing the fixing rod 11 from slipping. This embodiment only provides a preferred solution.

[0055] In some alternative embodiments, the limiting portion 111 protrudes from the outer side, and the snap-fit ​​portion 211 is recessed into the wall of the mounting hole 21.

[0056] like Figures 2-3 As shown, the limiting part 111 is a boss protruding from the outer side, and the snap-fit ​​part 211 is a groove recessed into the wall of the mounting hole 21. Under normal circumstances, the diameter of the fixing rod 11 is between 4mm and 12mm. If the limiting part 111 is a recessed design, the limiting part 111 will occupy a part of the thickness, which will weaken the strength of the fixing rod 11 to a certain extent.

[0057] Furthermore, to facilitate manufacturing and ensure connection strength, the fixing rod 11 and the limiting part 111 are integrally molded structures, making it easier to manufacture the molding die applicable when manufacturing the fixing rod 11 with the protruding limiting part 111.

[0058] In other embodiments, the recessed limiting portion 111 is also applicable, and correspondingly, the snap-fit ​​portion 211 in the mounting hole 21 protrudes from the hole wall.

[0059] For the fixing rod 11 with the recessed limiting part 111, in addition to being directly formed during molding in the mold, a smooth columnar fixing rod 11 can be manufactured first, and then the limiting part 111 can be machined on the outer side of the fixing rod 11 according to the shape of the snap-fit ​​part 211.

[0060] In this embodiment, the fixing rod 11 has a smooth outer surface, so there is no problem of the limiting part 111 protruding from the outer surface affecting the thread processing. Therefore, the threads at both ends of the fixing rod 11 can be external threads, which reduces the step of drilling threaded holes 112 at both ends of the fixing rod 11. The locking member 12 can be a nut. At this time, the connection between the fixing rod 11 and the locking member 12 is achieved through the thread on the outer surface of the fixing rod 11. Therefore, the length of the fixing rod 11 needs to be greater than the length of the mounting hole 21 so that the threaded parts at both ends are exposed in the mounting hole 21 and connected to the locking member 12.

[0061] Additionally, in some alternative embodiments, the surface of the bracket 20 is provided with a groove around the mounting hole 21, the groove being used to receive and abut against the locking member 12.

[0062] like Figure 4 As shown, the mounting hole 21 on the bracket 20 is recessed from other parts of the bracket 20. The two ends of the bracket 20 are at least higher than the two ends of the fastener 10 to protect the locking member 12 exposed to the mounting hole 21, preventing the locking member 12 from colliding with other battery modules 100 and the battery compartment for accommodating the battery modules 100 during installation and movement.

[0063] This utility model provides a battery module 100, which has fasteners 10 and brackets 20 that cooperate with each other. The fastener 10 consists of a fixing rod 11 and locking members 12 connected to both ends of the fixing rod 11. It can not only be used to lock the battery module 100 during assembly to ensure the firmness of the battery module 100 and prevent slippage, but also has strong versatility and is suitable for batteries of all heights. The locking members 12 at both ends of the fixing rod 11 are detachable. The fixing rod 11 is used to pass through the mounting hole 21 to connect multiple brackets 20 in series. The height of the battery module 100 composed of multiple brackets 20 stacked is matched with the length of the fixing rod 11. For battery modules 100 of different heights, the fixing rod 11 of the corresponding length can be cut. Compared with the previous screws that needed to be customized to assemble the battery modules 100 into modules, the fixing rod 11 of this fastener 10 can be manufactured from the same mold, which greatly reduces the material and processing costs of customized screws.

[0064] This utility model embodiment also discloses an electronic device, including any of the battery modules 100 disclosed in the above embodiments.

[0065] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0067] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0068] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery module (100), characterized in that, It includes multiple individual battery cells (30), multiple brackets (20) and fasteners (10), the multiple individual battery cells (30) are disposed on the brackets (20), the multiple brackets (20) are stacked along a first direction, and the brackets (20) have mounting holes (21) extending along the first direction; The fastener (10) includes a fixing rod (11) and two locking members (12). The fixing rod (11) passes through the mounting hole (21) along the first direction to connect multiple brackets (20) in series. The two locking members (12) are respectively connected to the two ends of the fixing rod (11) and abut against the brackets (20) to limit the movement of the brackets (20) along the first direction. The fixing rod (11) has an outer side surface adjacent to the mounting hole (21). The outer side surface is provided with a limiting part (111). The mounting hole (21) is provided with a corresponding snap-fit ​​part (211). The limiting part (111) cooperates with the snap-fit ​​part (211) to limit the rotation of the fixing rod (11) in the mounting hole (21).

2. The battery module (100) according to claim 1, characterized in that, The fixing rod (11) has threaded holes (112) at both ends. The surface of the threaded hole (112) has internal threads. The locking member (12) includes a threaded rod (121) and a stud (122) connected coaxially. The surface of the threaded rod (121) has external threads. The threaded rod (121) is inserted into the threaded hole (112). The external threads are engaged with the internal threads. The stud (122) is exposed in the mounting hole (21) and abuts against the bracket (20).

3. The battery module (100) according to claim 2, characterized in that, The outer diameter of the column head (122) is larger than the diameter of the mounting hole (21).

4. The battery module (100) according to claim 1, characterized in that, The dimension of the fixing rod (11) along the first direction is L1, and the dimension of the mounting hole (21) along the first direction is L2, wherein L1 < L2.

5. The battery module (100) according to claim 1, characterized in that, The limiting part (111) extends from one end of the fixing rod (11) to the other end along the first direction, and the snap-fit ​​part (211) extends from one end of the mounting hole (21) to the other end along the first direction.

6. The battery module (100) according to claim 1, characterized in that, The limiting part (111) protrudes from the outer side, and the snap-fit ​​part (211) is recessed into the wall of the mounting hole (21).

7. The battery module (100) according to claim 1, characterized in that, The bracket (20) has a groove around the mounting hole (21) on its surface, the groove being used to accommodate the locking member (12) and abut against the locking member (12).

8. The battery module (100) according to claim 1, characterized in that, The fixing rod (11) and the limiting part (111) are integrally formed.

9. The battery module (100) according to claim 2, characterized in that, The locking element (12) is a screw.

10. An electronic device, characterized in that, Includes the battery module (100) as described in any one of claims 1 to 9.

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