A fixing structure of a battery pack module

Abstract

The utility model relates to a kind of fixing structure of battery pack module, including battery pack shell and installation platform, battery pack shell is equipped with connecting plate, screw is jointly provided on connecting plate and installation platform;Battery pack shell inside is provided with electric core group, and installation gap is left between each electric core group;Battery pack shell is equipped with the connecting through-hole located at installation gap, arc spring is set in battery pack shell around connecting through-hole, and the inner arc side of arc spring is equipped with dentate protrusion, connecting plate is equipped with multiple connecting columns, each connecting column passes through connecting through-hole and extends into the inside of battery pack shell, and the outside of connecting column is equipped with the thread protrusion that can be connected with dentate protrusion;Arc spring outside is equipped with fastening assembly, so that dentate protrusion and the thread protrusion outside the mutual clamping of connecting column are clamped. To form multiple dispersed to inside multiple groups of clamping points, reduce the plastic deformation risk of battery pack shell and bolt fixing area.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, specifically relating to a fixing structure for a battery pack module. Background Technology

[0002] In the field of new energy vehicle battery pack technology, the reliable fixing of the battery pack module to the vehicle installation platform is the core of the safe operation of the whole vehicle, and its structure needs to take into account both ease of assembly and vibration load resistance.

[0003] The current mainstream fixing method is edge bolt fastening, which involves setting a connecting plate around the edge of the battery pack casing, and using screws to pass through the connecting plate to lock and fix the module to the vehicle mounting platform. This method is simple in structure and easy to install and disassemble, and has been used stably in early lightweight battery packs, remaining the industry mainstream for a long time.

[0004] However, with the increasing demand for extended driving range, battery packs now weigh 200-800 kg, highlighting the shortcomings of traditional solutions under heavy loads, especially during vehicle vibrations. During driving, road bumps, power vibrations, and the inertial forces of rapid acceleration and deceleration cause the battery pack to vibrate and displace. This load needs to be transferred to the vehicle's balance through a fixed structure. Existing edge-fixed designs have a single, concentrated load transfer path, meaning the overall vibration inertial force of the battery pack is almost entirely borne by the edge bolts of the housing. The inner area where the housing contacts the mounting platform lacks support and a load transfer channel, failing to distribute the load. The areas where the edge bolts are fixed (such as around bolt holes and weld seams on connecting plates) are subjected to concentrated stress exceeding the threshold for extended periods. Due to uneven stress distribution on the side where the housing contacts the vehicle (the edges are constrained by bolt tension, while the inner side is unsupported and concave), plastic deformation easily occurs, manifesting as localized housing concavity, radial cracks in bolt holes, and warping of connecting plates.

[0005] Such deformation can damage the sealing structure, leading to loose bolts, stripped threads, weakened fixing strength, and in extreme cases, battery pack displacement, posing a safety hazard. Utility Model Content

[0006] The purpose of this utility model is to provide a fixing structure for a battery pack module to solve the problems existing in the background art.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: A fixing structure for a battery pack module includes a battery pack housing and a mounting platform. A connecting plate is provided on one edge of the battery pack housing, and screws are provided on both the connecting plate and the mounting platform. The battery pack housing contains multiple sets of battery cells, with installation gaps between each set of battery cells. The battery pack housing has multiple connecting through holes located at the mounting gap on the side near the connecting plate. The battery pack housing has multiple arc-shaped spring pieces arranged around the connecting through holes inside. The inner arc side of the arc-shaped spring pieces has tooth-shaped protrusions, and the tooth-shaped protrusions are inclined towards the direction of the battery pack housing away from the mounting platform. The connecting plate is provided with a plurality of connecting posts, each of which extends through the connecting through hole into the interior of the battery pack housing, and the outer side of the connecting post is provided with a threaded protrusion that can engage with the toothed protrusion. The outer side of the arc-shaped spring is provided with a fastening component, which is used to bring the arc-shaped spring closer to the connecting post, so that the toothed protrusion and the threaded protrusion on the outer side of the connecting post engage with each other.

[0008] Optionally, the fastening assembly includes: The fastening ring has an internal thread, and the outer surfaces of each of the arc-shaped springs are inclined and have an external thread on their outer surfaces. The fastening ring is threaded onto the outer surfaces of each of the arc-shaped springs so that when the fastening ring is fitted onto the outer surfaces of the arc-shaped springs, as the fastening ring moves toward the inner wall of the battery pack housing, it can gradually compress the arc-shaped springs toward the connecting post.

[0009] Optionally, the fastening assembly further includes: A bracket is disposed on the side of the fastening ring away from the inner wall of the battery pack housing; A nut is provided on the bracket and located on the central axis of the fastening ring; The disassembly rod has a recess at one end that can be fitted onto the nut. The battery pack housing has multiple disassembly through holes aligned with the connection through hole on the side away from the connection through hole. The disassembly rod can pass through the disassembly through holes and engage with the nut.

[0010] Optionally, the battery pack housing is provided with a cover plate at the disassembly through hole.

[0011] Optionally, the disassembly rod is provided with a handle at its end.

[0012] The beneficial effects of this utility model are: By using a dual structure of edge screw fixing, inner arc-shaped spring sheet and connecting post snap-fit, the vehicle vibration load is distributed from the edge bolt alone to multiple sets of snap-fit ​​points on the inside, reducing the risk of plastic deformation between the battery pack shell and the bolt fixing area.

[0013] The pre-installed fastening rings allow the battery pack to be directly snapped into place during packaging, eliminating the need for on-site adjustment of the spring clips. During disassembly, only a single disassembly rod is needed to loosen the fastening rings, without disassembling the battery cell assembly, thus reducing the difficulty of operation. Attached Figure Description

[0014] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the fixing structure of a battery pack module according to the present invention; Figure 2 This is a cross-sectional view of the fixing structure of a battery pack module according to the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the fixing structure of a battery pack module according to the present invention. Figure 2 ; Figure 4 This is a partial structural diagram of the fixing structure of a battery pack module according to the present invention; Figure 5 This is a schematic diagram of the fastening component for fixing a battery pack module according to the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the fastening component for fixing a battery pack module according to the present invention. Figure 2 ; The symbols for the main components are explained below: Battery pack housing 101, mounting platform 102, connecting plate 103, connecting through hole 104, screw 105, cell assembly 106, arc-shaped spring 107, toothed protrusion 108, connecting post 109, fastening ring 201, bracket 202, nut 203, disassembly rod 204, disassembly through hole 205, cover plate 206, handle 207. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] like Figure 1-6 As shown, a fixing structure for a battery pack module includes a battery pack housing 101 and a mounting platform 102. A connecting plate 103 is provided on one side edge of the battery pack housing 101, and screws 105 are provided on both the connecting plate 103 and the mounting platform 102. The battery pack housing 101 has multiple sets of battery cell groups 106 inside, with installation gaps between each set of battery cell groups 106. The battery pack housing 101 has multiple connecting through holes 104 located in the installation gap on the side near the connecting plate 103. Multiple arc-shaped spring pieces 107 are arranged around the connecting through holes 104 inside the battery pack housing 101. The inner arc side of the arc-shaped spring piece 107 is provided with tooth-shaped protrusions 108, and the tooth-shaped protrusions 108 are inclined towards the direction of the battery pack housing 101 away from the installation platform 102. The connecting plate 103 is provided with a plurality of connecting posts 109, each connecting post 109 extending into the interior of the battery pack housing 101 through the connecting through hole 104, and the outer side of the connecting post 109 is provided with a threaded protrusion that can engage with the toothed protrusion 108. The outer side of the arc-shaped spring 107 is provided with a fastening component, which is used to bring the arc-shaped spring 107 closer to the connecting post 109, so that the toothed protrusion 108 and the threaded protrusion on the outer side of the connecting post 109 engage with each other.

[0018] The battery pack housing 101 is the core carrier for the outer protection and inner support of the entire battery pack module. It is made of high-strength alloy material (such as aluminum alloy), which can provide a stable installation space for multiple sets of internal cell groups 106, and can also adapt to the fixing requirements through structural design. Multiple connection through holes 104 are opened on the side near the connecting plate 103, and arc-shaped spring pieces 107 are arranged around each connection through hole 104, so that the housing is not only a "protective shell", but also a mounting base for the inner snap-fit ​​structure.

[0019] The mounting platform 102, which is the part of the vehicle body used to support the battery pack module, is a key bridge for force transmission between the battery pack and the vehicle body. Its surface is integrated with multiple connecting posts 109 that correspond one-to-one with the connecting through holes 104 of the battery pack housing 101. This provides a precise positioning reference for battery pack installation and avoids assembly efficiency problems caused by misalignment of traditional bolt holes. More importantly, the mounting platform 102 extends into the inside of the battery pack through the connecting posts 109, transforming the vibration load that was originally transmitted only through the edge bolts into a transmission path of "edge + multiple points inside". This provides a structural basis for load distribution from the vehicle body side and reduces the risk of stress concentration on the battery pack side.

[0020] The connecting plate 103 is a sheet-like structure extending from the edge of the battery pack housing 101 (it can be integrally formed with the housing or welded and fixed). Together with the screws 105 passing through it and the mounting platform 102, it forms an edge base fixing unit. The screws 105 initially fix the edge of the battery pack to the mounting platform 102 through axial locking force, which can prevent the battery pack from shifting laterally during installation or slight vibration, creating a prerequisite for the precise docking of the inner arc-shaped spring and the connecting post. At the same time, when the vehicle vibrates, the connecting plate 103 and the screws 105 can bear part of the lateral shear force, forming a force synergy with the inner snap-fit ​​structure. The inner structure bears the longitudinal pull-out force and most of the vibration inertial force. The two complement each other, avoiding thread stripping or connecting plate warping due to overload of a single structure.

[0021] Cell group 106 (only one group is shown in the figure) is the energy storage core of the battery pack. It is composed of multiple individual cells connected in series / parallel. The installation gaps reserved between the cell groups are not redundant designs, but are key to balancing energy storage performance and structural compatibility. From the perspective of energy storage performance, the installation gaps provide necessary heat dissipation space for cell group 106, which can avoid performance degradation or safety hazards caused by heat accumulation during cell operation, meeting the basic requirements of battery pack thermal management. From the perspective of structural compatibility, the connecting through hole 104 is opened at the installation gap, which can completely avoid the cell body and prevent through hole deformation or cell damage caused by cell compression when the through hole is opened directly below the cell group. This achieves a non-interference layout between energy storage function and fixed structure.

[0022] The connecting through hole 104 is located on the side of the battery pack housing 101 near the connecting plate 103, precisely at the installation gap of the cell assembly 106. Its core function is to construct a connection channel between the vehicle body and the inside of the battery pack. The inner diameter of the through hole is slightly larger than the outer diameter of the connecting post 109, ensuring that the connecting post 109 can be smoothly inserted while preventing the battery pack from shaking due to excessive gaps after insertion. At the same time, the arc-shaped spring piece 107 arranged around the connecting through hole 104 can directly contact and engage with the outer side of the post after the connecting post 109 is inserted. This makes the through hole not only the insertion channel for the connecting post but also the force-bearing interface between the spring piece and the connecting post. This ensures that the vibration load can be transmitted through the connecting post and through the through hole to the arc-shaped spring piece and then distributed to the battery pack housing without passing through the cell assembly, thus avoiding compression of the cells.

[0023] The arc-shaped spring sheet 107 is made of elastic metal materials such as spring steel and is evenly arranged around the connecting through hole 104 (generally in groups of 3-4 pieces). It is the core component for realizing the elastic snap-fit ​​of the inner side of the battery pack. In its natural state, the arc-shaped spring sheet 107 has an outward expansion elastic tendency. Its inner arc diameter is slightly larger than the outer diameter of the connecting post 109, which can accommodate the small diameter deviation of the connecting post caused by processing errors. When subjected to external force, the spring sheet can contract inward, so that the toothed protrusion 108 on the inner arc side fits and snaps against the connecting post 109, ensuring the reliability of the snap-fit. In addition, when the vehicle vibrates, the arc-shaped spring sheet 107 can buffer the relative displacement impact force between the battery pack and the vehicle body through its own elastic deformation (slight stretching or compression), converting the impact force into the elastic potential energy of the spring sheet, avoiding structural damage caused by rigid collision, and thus further dispersing vibration stress.

[0024] The toothed protrusions 108 are integrally formed on the inner arc side of the arc-shaped spring piece 107, spaced apart along the length of the spring piece, and tilted towards the direction away from the mounting platform 102 of the battery pack housing 101. This design serves the dual purpose of enhancing engagement reliability and guiding installation direction. Regarding engagement reliability, the teeth of the toothed protrusions 108 precisely engage with the threaded protrusions on the outer side of the connecting post 109, forming a mechanical interlock. When the battery pack tends to pull out upwards due to vibration, the inclined surfaces of the toothed protrusions and the inclined surfaces of the threaded protrusions press against each other, increasing the engagement force as the pull-out force increases, completely preventing relative sliding between the connecting post and the spring piece. Regarding ease of installation, the tilted direction allows the threaded protrusions to "slide in smoothly" along the inclined surfaces of the toothed protrusions when the connecting post 109 is inserted, eliminating the need for additional force to squeeze the spring piece, significantly improving assembly efficiency and achieving a balance between "effortless installation and secure anti-detachment."

[0025] The connecting post 109 is a columnar structure integrally formed or welded onto the mounting platform 102. Made of the same high-strength steel as the mounting platform, it serves as a rigid connection medium between the vehicle body and the inner side of the battery pack. Its core function is to extend the support range of the vehicle body from the edge of the battery pack to multiple points on the inner side, allowing vibration loads to be distributed and transmitted to the battery pack through multiple connecting posts. In traditional solutions, the vehicle body only transmits support force to the battery pack through edge bolts, with no stress points on the inner side. However, after the connecting post 109 penetrates the connecting through-hole of the battery pack housing, it engages with the toothed protrusion 108 of the arc-shaped spring (the toothed protrusion 108 is made of an elastic material such as plastic, which can be appropriately compressed), creating a multi-directional force transmission path and avoiding the edge bolts being subjected to single force. Simultaneously, the threaded protrusion on the outer side of the connecting post has the same tooth pitch and tooth height as the toothed protrusion 108. Even if the insertion depth of the connecting post deviates slightly, there is still a corresponding tooth shape that meshes with the spring protrusion, improving the fault tolerance of the engagement and ensuring connection stability.

[0026] Specifically, the fastening components include: The fastening ring 201 has an internal thread. The outer surfaces of each arc-shaped spring 107 are inclined and have an external thread. The fastening ring 201 is threaded onto the outer surface of each arc-shaped spring 107 so that when the fastening ring 201 is fitted onto the outer surface of the arc-shaped spring 107, as the fastening ring 201 moves toward the inner wall of the battery pack housing 101, it can gradually compress the arc-shaped spring 107 toward the connecting post 109.

[0027] The fastening ring 201 is the core component that drives the arc-shaped spring 107 to retract and achieves stable engagement between the toothed protrusion 108 and the connecting post 109. Its design revolves around controllable fastening and reliable locking, adapting to the needs of the overall fixing scheme.

[0028] The fastening ring 201 is a ring-shaped metal part with an internal thread. Its core function is to form a "threaded engagement" with the arc-shaped spring 107. The outer surface of the arc-shaped spring 107 is inclined, and multiple springs are spliced ​​together to form an external thread surface that matches the internal thread. The conversion from "rotation to axial movement" is achieved through thread engagement. This not only avoids the problem of easy loosening of snap-fit ​​fasteners, but also prevents the fastening ring from shifting due to vehicle vibration by taking advantage of the self-locking characteristics of the thread.

[0029] Its working logic is simple and direct: when the fastening ring 201 is fitted onto the outside of the arc-shaped spring 107 and rotates towards the inner wall of the battery pack housing, the internal thread will squeeze the inclined outer surface of the spring, generating a radial centripetal extrusion force, forcing the spring to contract towards the connecting post 109. As the fastening ring continues to move, the extrusion force gradually increases, eventually allowing the toothed protrusion 108 of the spring to precisely engage with the threaded protrusion of the connecting post, forming a stable snap-fit.

[0030] This design is also compatible with the entire process: when the battery pack is pre-installed with the cell group 106 before leaving the factory, the fastening ring 201 can be placed on the arc-shaped spring piece 107 and rotated to a position close to the inner wall of the housing, so that the spring piece retracts to the "ready to engage" state in advance. At this time, the toothed protrusion 108 has the ability to engage. When installing the vehicle later, the connecting post 109 only needs to be inserted into the connecting through hole 104 to directly achieve engagement and engagement without the need to adjust the fastening ring on site, which greatly improves the efficiency of vehicle installation. When disassembling later, the fastening ring 201 only needs to be rotated in the opposite direction to move it away from the inner wall of the housing. The radial compressive force disappears, and the arc-shaped spring piece 107 will return to the expanded state under its own elasticity. The toothed protrusion 108 disengages from the threaded protrusion, and the connecting post 109 can be smoothly pulled out to achieve non-destructive disassembly.

[0031] Furthermore, the fastening components also include: The bracket 202 is located on the side of the fastening ring 201 away from the inner wall of the battery pack housing 101; Nut 203 is mounted on bracket 202 and located on the central axis of fastening ring 201; The disassembly rod 204 has a recess at one end that can be fitted into the nut 203. The battery pack housing 101 has multiple disassembly through holes 205 aligned with the connecting through hole 104 on the side away from the connecting through hole 104. The disassembly rod 204 can pass through the disassembly through hole 205 and engage with the nut 203.

[0032] The bracket 202, nut 203, disassembly rod 204 and disassembly through hole 205 together constitute a controllable loosening unit. The core is to solve the disassembly problem after the arc-shaped spring 107 is snapped in by "precise positioning transmission plus universal tool adaptation". At the same time, it realizes the convenience of "one disassembly rod to disassemble multiple sets of fastening rings", taking into account both the reliability of fixation and the efficiency of later maintenance.

[0033] The bracket 202 serves as a positioning and transmission bridge connecting the fastening ring 201 and the nut 203. It is fixed to the side of the fastening ring 201 away from the inner wall of the battery pack housing. It is not just a simple "connector" but also plays a dual role of "coaxial positioning" and "torque transmission". On the one hand, the bracket 202 is rigidly connected to the fastening ring 201 through multiple sets of ribs, ensuring that the nut 203 can be accurately aligned with the central axis of the fastening ring 201 after installation. This avoids the nut from shifting and causing misalignment of the disassembly rod, ensuring uniform force during torque transmission and preventing damage to the fastening ring or spring. On the other hand, when the nut 203 is rotated by external force, the bracket 202 can directly transmit the torque to the fastening ring 201, realizing synchronous transmission of "nut rotation → bracket rotation → fastening ring rotation". It can control the loosening without direct contact with the fastening ring, which is suitable for the compact space layout inside the battery pack.

[0034] Nut 203 is the force-bearing interface for disassembly. It is fixed on bracket 202 and coaxial with fastening ring 201. The design logic revolves around universal compatibility and stable force transmission: Nut 203 adopts a uniform specification (such as hexagonal concave or slotted structure) to precisely match the recess of disassembly rod 204, ensuring that fastening ring 201 in different positions can be connected to the same disassembly rod through nuts of the same specification; at the same time, the rigid connection between nut 203 and bracket 202 (such as welding or one-piece molding) can prevent nut from slipping or falling off during disassembly, ensuring that the rotational force can be completely transmitted to fastening ring 201, achieving a stable effect of loosening upon rotation.

[0035] The disassembly rod 204 is a universal disassembly tool, and its recessed design at one end is key: the shape of the recess perfectly matches the nut 203 (e.g., the recessed inner hexagon corresponds to the hexagonal nut), eliminating the need to change tools. One disassembly rod can connect to the nuts 203 of all fastening rings, solving the problem of needing different tools for different positions in traditional solutions. Furthermore, the length and diameter of the disassembly rod 204 are adapted to the depth and inner diameter of the disassembly through hole 205, allowing it to easily pass through the through hole to contact the nut without bending under force due to the rod being too thin, ensuring that torque can be applied stably during disassembly.

[0036] The disassembly through hole 205 is the disassembly path channel, which is opened on the side of the battery pack housing 101 away from the connecting through hole 104 (i.e., the outside of the housing) and is aligned with the connecting through hole 104. Its core function is precise guidance: the alignment design allows the disassembly rod 204 to be inserted from the outside of the housing without having to look for the nut inside - it can be directly snapped into the nut 203 along the axis of the through hole, saving the step of disassembling the battery pack housing or cell assembly; at the same time, the inner diameter of the through hole is slightly larger than the diameter of the disassembly rod, which ensures that the rod can be inserted smoothly and avoids the misalignment caused by shaking, simplifying the disassembly operation from a complex internal operation to a precise external rod insertion and rotation.

[0037] The combined logic of these four components forms an efficient disassembly loop: During disassembly, simply pass a disassembly rod 204 through the corresponding disassembly through hole 205 from the outside of the housing, causing the recessed locking nut 203 to engage. Rotating the disassembly rod will cause the fastening ring 201 to rotate in the opposite direction via the bracket 202. The fastening ring moves away from the inner wall of the housing, the compressive force on the arc-shaped spring piece 107 disappears, the spring piece resumes its expansion, the toothed protrusion 108 disengages from the connecting post 109, and the battery pack can be pulled out. The entire process requires no multiple sets of tools, and the operation is only completed on the outside of the housing, greatly reducing maintenance difficulty while not affecting the safety of the battery cells inside the battery pack.

[0038] Furthermore, the battery pack housing 101 is provided with a cover plate 206 at the disassembly through hole 205.

[0039] The design of the cover plate 206 directly addresses the openness defect of the disassembly through hole 205. As a channel penetrating the battery pack housing 101, the disassembly through hole 205, if exposed for extended periods when not disassembling, allows dust, rainwater, road debris, or oil and moisture from the surrounding area to easily enter the housing. This can lead to the following: firstly, it may adhere to the surfaces of the curved spring contact 107 and the nut 203, causing thread jamming and spring contact failure during subsequent disassembly; secondly, if it seeps into the cell assembly 106 area, it may damage the cell insulation performance, posing a short-circuit risk. The cover plate 206, through a sealing fit with the edge of the through hole (such as a rubber sealing ring or a snap-fit ​​design), completely seals the through hole, forming a physical barrier that isolates external impurities from the housing. It also reduces air convection between the housing and the outside environment, helping to maintain the stability of the cell's operating environment.

[0040] Furthermore, a handle 207 is provided at the end of the disassembly rod 204.

[0041] The handle 207 is a human-computer interaction and force application assistance component of the disassembly lever 204. Its core function is to make the rotation of the nut 203 by the disassembly lever easier and more controllable by optimizing the grip experience and improving the stability of torque transmission.

[0042] Overall, when this structure is used: Pre-assembly stage: When processing the battery pack, the fastening ring 201 is placed on the outside of the arc-shaped spring piece 107 and rotated to move it toward the inner wall of the battery pack housing 101, compressing the spring piece to the ready-to-lock state (the toothed protrusion 108 has the locking ability).

[0043] Vehicle body installation: Align the connecting through hole 104 of the battery pack housing 101 with the connecting post 109 of the mounting platform 102 (vehicle body) and insert it. The toothed protrusion 108 of the spring clip engages with the threaded protrusion of the connecting post 109. Then, use screws 105 to pass through the connecting plate 103 and the mounting platform 102 to complete the edge fixing.

[0044] Disassembly stage: Remove the cover plate 206 at the disassembly through hole 205, insert the disassembly rod 204 into the through hole and engage the nut 203, rotate the disassembly rod to move the fastening ring 201 in the opposite direction and loosen the spring piece; the spring piece expands again and the toothed protrusion disengages from the connecting post, and the battery pack can be pulled out.

[0045] 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.

[0046] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, 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 a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0047] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A fixing structure for a battery pack module, comprising a battery pack housing and a mounting platform, characterized in that: A connecting plate is provided on one edge of the battery pack housing, and screws are provided on both the connecting plate and the mounting platform. The battery pack housing contains multiple sets of battery cells, with installation gaps between each set of battery cells. The battery pack housing has multiple connecting through holes located at the mounting gap on the side near the connecting plate. The battery pack housing has multiple arc-shaped spring pieces arranged around the connecting through holes inside. The inner arc side of the arc-shaped spring pieces has tooth-shaped protrusions, and the tooth-shaped protrusions are inclined towards the direction of the battery pack housing away from the mounting platform. The connecting plate is provided with a plurality of connecting posts, each of which extends through the connecting through hole into the interior of the battery pack housing, and the outer side of the connecting post is provided with a threaded protrusion that can engage with the toothed protrusion. The outer side of the arc-shaped spring is provided with a fastening component, which is used to bring the arc-shaped spring closer to the connecting post, so that the toothed protrusion and the threaded protrusion on the outer side of the connecting post engage with each other.

2. The fixing structure of the battery pack module according to claim 1, characterized in that, The fastening assembly includes: The fastening ring has an internal thread, and the outer surfaces of each of the arc-shaped springs are inclined and have an external thread on their outer surfaces. The fastening ring is threaded onto the outer surfaces of each of the arc-shaped springs so that when the fastening ring is fitted onto the outer surfaces of the arc-shaped springs, as the fastening ring moves toward the inner wall of the battery pack housing, it can gradually compress the arc-shaped springs toward the connecting post.

3. The fixing structure of the battery pack module according to claim 2, characterized in that, The fastening assembly also includes: A bracket is disposed on the side of the fastening ring away from the inner wall of the battery pack housing; A nut is provided on the bracket and located on the central axis of the fastening ring; The disassembly rod has a recess at one end that can be fitted onto the nut. The battery pack housing has multiple disassembly through holes aligned with the connection through hole on the side away from the connection through hole. The disassembly rod can pass through the disassembly through holes and engage with the nut.

4. The fixing structure of the battery pack module according to claim 3, characterized in that: The battery pack housing is provided with a cover plate at the disassembly through hole.

5. The fixing structure of the battery pack module according to claim 3, characterized in that: The disassembly rod has a handle at its end.

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