Lithium battery module fixing device

Abstract

The invention discloses a lithium battery module fixing device which comprises a fixing box, a limiting rod, a bottom plate assembly, a transmission assembly, a fixing mechanism and a cover plate assembly. A plurality of limiting rods are arranged in the fixed box, and the bottom plate assembly is arranged at the bottom of the fixed box in a lifting mode and has elasticity; the transmission assembly is slidably arranged in the fixing box, and descending of the bottom plate assembly can drive the transmission assembly to slide in the direction away from the bottom plate assembly. The fixing mechanism is arranged in the fixing box in a sliding mode, and movement of the transmission assembly can drive the fixing mechanism to move together. When the cover plate assembly seals the fixing box, the fixing mechanism can be driven to move in the direction close to the bottom plate assembly, and meanwhile the transmission assembly is kept static. The lithium battery module fixing device can be used for fixing battery modules with different lengths and sizes.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy vehicles, in particular to a lithium battery module fixing device. BACKGROUND

[0002] With the increasing of global energy crisis and environmental protection awareness, new energy vehicles, as an important part of sustainable transportation, have developed rapidly. As the core power source of new energy vehicles, the performance stability and structural safety of lithium battery modules directly affect the endurance, power output and operation safety of the whole vehicle, so they play a key role in the research and production of new energy vehicles.

[0003] In order to ensure that the lithium battery module can withstand the vibration, impact and other loads caused by complex road conditions during vehicle driving, avoid circuit connection failure, module structure damage and even safety accidents caused by displacement or shaking, it is necessary to install it stably in the vehicle body by a special fixing device. At present, the existing lithium battery module fixing device is mostly a special structure designed for a specific specification module, and its size parameters are matched with the length, width and other physical characteristics of the corresponding module.

[0004] However, in actual application, in order to meet the endurance requirements of different vehicle models or adapt to various use scenarios, new energy vehicles often need to carry lithium battery modules with different power. The difference in power of different lithium battery modules directly leads to significant differences in the overall length of the module. The existing fixing device has limited adjustment range of installation size, and even cannot be adjusted. When different lengths of lithium battery modules need to be replaced, the fixing device needs to be replaced or greatly modified, which not only increases the production and maintenance cost, reduces the assembly efficiency, but also limits the flexibility of new energy vehicles in battery configuration, and is difficult to adapt to the demand of the rapidly developing new energy vehicle industry for the diversification of lithium battery module adaptation. SUMMARY

[0005] In view of the shortcomings of the prior art, the purpose of the present application is to provide a lithium battery module fixing device to solve the technical problem that the existing lithium battery fixing device is difficult to fix different length battery modules mentioned in the background.

[0006] To achieve the above-mentioned purpose of the application, the technical scheme adopted by the present application comprises: A lithium battery module fixing device, comprising a fixing box, a limiting rod, a bottom plate assembly, a transmission assembly, a fixing mechanism and a cover plate assembly; The fixing box is provided with a plurality of limiting rods, the bottom plate assembly is provided at the bottom of the fixing box in a lifting manner and has elasticity, and the transmission assembly is slidably arranged in the fixing box, and the descent of the bottom plate assembly can drive the transmission assembly to slide away from the bottom plate assembly; The fixing mechanism is slidably arranged in the fixing box, and the movement of the transmission assembly can drive the fixing mechanism to move; when the cover plate assembly closes the fixing box, the fixing mechanism can be driven to move towards the bottom plate assembly, and the transmission assembly remains stationary.

[0007] Further, the bottom plate assembly comprises a bottom plate body, a bottom plate spring and a pushing block; the bottom plate body is arranged on the bottom surface of the fixing box through the bottom plate spring, and the pushing block is fixed to the bottom plate body on the side close to the bottom surface of the fixing box; the descent of the pushing block can drive the transmission assembly to move.

[0008] Further, the transmission assembly comprises a sliding wedge, a sliding connecting rod and a pushing rack; the sliding wedge is slidably connected to the bottom surface of the fixing box and connected to the sliding connecting rod and the pushing rack; the sliding of the pushing rack can drive the fixing mechanism to move.

[0009] Further, the fixing assembly comprises a driven assembly, a clamping assembly and a driving assembly; the driven assembly comprises a driven gear, a driven shaft and an incomplete gear; the driven shaft is rotatably connected in the fixing box; the driven gear and the incomplete gear are coaxially fixed to the driven shaft; the driven gear is engaged with the pushing rack; the clamping assembly is slidably connected in the fixing box; the rotation of the incomplete gear can drive the clamping assembly to slide; the driving assembly is rotatably arranged in the fixing box; the lifting of the cover plate assembly can drive the driving assembly to rotate; the rotation of the driving assembly can drive the clamping assembly to slide.

[0010] Further, the clamping assembly comprises a clamping rack, a driven rack and a clamping plate; the clamping rack is slidably connected in the fixing box; the clamping rack can be engaged with the incomplete gear; the driven rack and the fixing plate are fixed to the clamping rack; the rotation of the driving assembly can drive the driven rack to slide; the clamping plate can clamp the battery module.

[0011] Further, the driving assembly comprises a driving shaft, a driving gear and a transmission gear; the driving shaft is rotatably connected in the fixing box; the driving gear and the transmission gear are coaxially fixed to the driving shaft; the transmission gear is engaged with the driven rack; the descent of the cover plate assembly can drive the driving gear to rotate.

[0012] Further, the cover plate assembly comprises a cover plate body and a cover plate rack; the cover plate rack is fixed to the cover plate body and can be engaged with the driving gear.

[0013] Furthermore, a height limiting mechanism and a pushing wedge are also provided. The height limiting mechanism includes an upper baffle assembly and a limiting assembly. The upper baffle assembly is vertically mounted on the fixing mechanism, and the pushing wedge is fixed in the fixing box. When the fixing mechanism moves away from the bottom plate assembly, the pushing wedge can raise the upper baffle assembly. The limiting assembly is mounted on the fixing assembly and can limit the height position of the upper baffle assembly.

[0014] Furthermore, the upper baffle assembly includes a lifting rod, a lifting connecting rod, and an upper baffle body; the lifting rod is slidably connected to the fixing mechanism and connected to the upper baffle body through the lifting connecting rod, and the limiting component can limit the height position of the lifting rod.

[0015] Furthermore, the limiting assembly includes a ratchet rack, a connecting rod, a limiting rod, a pawl shaft, a pawl body, and a torsion spring; the ratchet rack is slidably connected to the fixing mechanism and connected to the limiting rod through the connecting rod; the lifting rod is provided with several limiting holes, and the limiting rod can be inserted into the limiting holes; the pawl shaft is located inside the fixing box, and the pawl body is rotatably located on the pawl shaft and connected to the fixing box through the torsion spring; the pawl body can restrict the ratchet rack from moving towards the battery module.

[0016] Compared with the prior art, the advantages of the present invention include: In this application, battery modules with different capacities have different weights, thus causing the base plate assembly to descend by different distances. This, in turn, drives the fixing mechanism to move by different distances via the transmission assembly. In other words, under the structure of this application, battery modules of different specifications can cause the fixing mechanism to move outwards by different distances when placed. Even if the descent of the cover plate assembly causes the fixing mechanism to move by the same distance, the battery module can still be clamped and fixed. Therefore, for battery modules with increased length, this application can adaptively clamp and fix them without additional operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an overall schematic diagram of a lithium battery module fixing device according to the present invention; Figure 2 This is a cross-sectional view of the fixed box in this invention; Figure 3This is a schematic diagram of the fixing mechanism in this invention; Figure 4 This is a cross-sectional view of the fixed box from another angle in this invention.

[0019] Figure label: Fixed box 1, limiting rod 11, base plate assembly 2, base plate body 21, base plate spring 22, pushing block 23, transmission assembly 3, sliding wedge block 31, sliding connecting rod 32, pushing rack 33, fixing mechanism 4, driven assembly 41, driven gear 411, driven shaft 412, incomplete gear 413, clamping assembly 42, clamping rack 421, driven rack 422, clamping plate 423, drive assembly 43, drive shaft 431. Drive gear; 432. Transmission gear; 433. Cover plate assembly; 5. Cover plate body; 51. Cover plate rack; 52. Height limiting mechanism; 6. Upper baffle assembly; 61. Lifting rod; 611. Limiting hole; 612. Lifting connecting rod; 613. Upper baffle body; 614. Limiting assembly; 62. Ratchet; 621. Connecting rod; 622. Limiting rod; 623. Pawl shaft; 624. Pawl body; 625. Torsion spring; 626. Push wedge; 7. Detailed Implementation

[0020] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0021] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0023] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0024] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0025] The present invention aims to introduce and explain the structural composition of a lithium battery module fixing device and the cooperation relationship between the components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the components in the lithium battery module fixing device in the present invention can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0026] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0027] Please refer to the following: Figures 1-4 This embodiment provides a lithium battery module fixing device, including a fixing box 1, a limiting rod 11, a base plate assembly 2, a transmission assembly 3, a fixing mechanism 4, and a cover plate assembly 5; The fixed box 1 is equipped with several limiting rods 11. The base plate assembly 2 is vertically and elastically mounted at the bottom of the fixed box 1. The transmission assembly 3 is slidably mounted inside the fixed box 1. The descent of the base plate assembly 2 can drive the transmission assembly 3 to slide away from the base plate assembly 2. The elastic force of the base plate assembly 2 is in the vertical direction. When battery modules with different capacities are placed inside the fixed box 1, they can drive the base plate assembly 2 to descend by different distances, thereby driving the transmission assembly 3 to move by different distances. Specifically, the battery modules are placed between the limiting rods 11 or between the limiting rods 11 and the inner side of the fixed box 1.

[0028] The fixing mechanism 4 is slidably disposed inside the fixing box 1. The movement of the transmission component 3 can drive the fixing mechanism 4 to move together. When the cover plate assembly 5 closes the fixing box 1, it can drive the fixing mechanism 4 to move towards the bottom plate assembly 2, while the transmission component 3 remains stationary. Specifically, the cover plate assembly 5 closes the top surface of the fixing box 1 by vertical descent and is fixed by bolts, etc. The descent of the cover plate assembly 5 drives the fixing mechanism 4 to move a fixed distance towards the bottom plate assembly 2, so that the fixing component clamps and fixes each battery module without driving the transmission component 3 to move.

[0029] In this application, battery modules with different capacities have different weights, thus causing the base plate assembly 2 to descend by different distances. This, in turn, drives the fixing mechanism 4 to move by different distances via the transmission assembly 3. In other words, under this structure, battery modules of different specifications can move the fixing mechanism 4 outwards by different distances when placed. Even if the descent of the cover plate assembly 5 causes the fixing mechanism 4 to move by the same distance, the battery module can still be clamped and fixed. Therefore, for battery modules with increased length, this application can adaptively clamp and fix them without additional operation.

[0030] In other embodiments, the base plate assembly 2 includes a base plate body 21, a base plate spring 22, and a push block 23. The base plate body 21 is vertically mounted on the bottom surface of the fixed box 1 via the base plate spring 22. The push block 23 is fixed to the side of the base plate body 21 near the bottom surface of the fixed box 1. The descent of the push block 23 can drive the transmission assembly 3 to move. Preferably, the bottom end of the push block 23 is an arc-shaped surface or an inclined surface, thereby enabling the transmission assembly 3 to slide smoothly.

[0031] In other embodiments, the transmission assembly 3 includes a sliding wedge 31, a sliding connecting rod 32, and a pushing rack 33. The sliding wedge 31 is slidably connected to the bottom surface of the fixed box 1 and is connected to the pushing rack 33 through the sliding connecting rod 32. The sliding of the pushing rack 33 can drive the fixed mechanism 4 to move. Specifically, the descent of the pushing block 23 can drive the sliding wedge 31 to move away from the base plate body 21.

[0032] In other embodiments, the fixing assembly includes a driven assembly 41, a clamping assembly 42, and a driving assembly 43. The driven assembly 41 includes a driven gear 411, a driven shaft 412, and a partial gear 413. The driven shaft 412 is rotatably connected to the fixed box 1. The driven gear 411 and the partial gear 413 are coaxially fixed on the driven shaft 412. The driven gear 411 meshes with the push rack 33. The clamping assembly 42 is slidably connected to the fixed box 1. The rotation of the partial gear 413 can drive the clamping assembly 42 to slide. The driving assembly 43 is rotatably disposed in the fixed box 1. The lifting and lowering of the cover assembly 5 can drive the driving assembly 43 to rotate. The rotation of the driving assembly 43 can drive the clamping assembly 42 to slide. Specifically, when the rack 33 is pushed to slide away from the base plate 21, it drives the driven gear 411 to rotate, which in turn drives the incomplete gear 413 to rotate. The rotation of the incomplete gear 413 can drive the clamping assembly 42 to slide away from the base plate 21 through meshing. When the rack 33 stops sliding, the incomplete gear 413 and the clamping assembly 42 are disengaged. At this time, the sliding of the clamping assembly 42 does not drive the rotation of the incomplete gear 413.

[0033] In other embodiments, the clamping assembly 42 includes a clamping rack 421, a driven rack 422, and a clamping plate 423. The clamping rack 421 is slidably connected within the fixed housing 1 and can mesh with the incomplete gear 413. The driven rack 422 and the fixed plate are respectively fixed on the clamping rack 421. The rotation of the drive assembly 43 can drive the driven rack 422 to slide, and the clamping plate 423 can clamp the battery modules. It should be understood that the clamping plate 423 is fixed on the clamping rack 421 near the end of the battery modules and can abut against and clamp each battery module.

[0034] In other embodiments, the drive assembly 43 includes a drive shaft 431, a drive gear 432, and a transmission gear 433. The drive shaft 431 is rotatably connected to the fixed housing 1. The drive gear 432 and the transmission gear 433 are coaxially fixed on the drive shaft 431. The transmission gear 433 meshes with the driven rack 422. The descent of the cover assembly 5 drives the drive gear 432 to rotate. That is, the descent of the cover assembly 5 drives the drive gear 432 to rotate, which in turn drives the transmission gear 433 to rotate. This causes the transmission gear 433 to move the driven rack 422 toward the battery module, thereby clamping and fixing the battery module.

[0035] In other embodiments, the cover plate assembly 5 includes a cover plate body 51 and a cover plate rack 52; the cover plate rack 52 is fixed on the cover plate body 51 and can mesh with the drive gear 432. Preferably, the cover plate body 51 is provided with a positioning post, and the fixing box 1 is provided with a positioning groove corresponding to the positioning post, so that when the cover plate body 51 descends, the cover plate rack 52 can mesh with the drive gear 432 as expected.

[0036] In other solutions, a height limiting mechanism 6 and a pushing wedge 7 are also provided. The height limiting mechanism 6 includes an upper baffle assembly 61 and a limiting assembly 62. The upper baffle assembly 61 is vertically mounted on the fixed mechanism 4, and the pushing wedge 7 is fixed in the fixed box 1. When the fixed mechanism 4 moves away from the bottom plate assembly 2, the pushing wedge 7 can raise the upper baffle assembly 61. The limiting assembly 62 is mounted on the fixed assembly and can limit the height position of the upper baffle assembly 61.

[0037] When fixing a battery module, fixing it in only one direction can easily cause it to move unexpectedly in other directions. Therefore, fixing it in other directions is a better choice. For example, changes in the charge content of a pouch battery module often cause changes in height and slight changes in thickness, in addition to changes in length. Therefore, the structure of this application adjusts the limiting height while adaptively adjusting the length, making the structure of this application more applicable. Specifically, as the fixing mechanism 4 moves away from the base plate assembly 2, it drives the upper baffle assembly 61 to move together, causing the upper baffle assembly 61 to abut against the inclined surface of the pushing wedge block 7, thereby raising the upper baffle assembly 61. The limiting assembly 62 can limit the height position of the upper baffle assembly 61. Therefore, when the fixing mechanism 4 moves towards the battery module, the upper baffle assembly 61 will be positioned above the battery module at a new height, limiting its height. Since the thickness of the battery changes slightly, it can be limited by the same limiting rod 11. The side of the limiting rod 11 can preferably be provided with a flexible pad to cope with the changes in the thickness direction of the battery module.

[0038] In other embodiments, the upper baffle assembly 61 includes a lifting rod 611, a lifting connecting rod 613, and an upper baffle body 614. The lifting rod 611 is slidably connected to the fixing mechanism 4 and is connected to the upper baffle body 614 via the lifting connecting rod 613. The limiting component 62 can limit the height position of the lifting rod 611. Specifically, the upper baffle body 614 is closer to the battery module in the horizontal direction than the clamping plate 423. The lifting rod 611 is slidably connected to the clamping rack 421. Preferably, the lifting rod 611 can counteract the downward trend of gravity on the upper baffle assembly 61 through its own friction, so that it can maintain its height position when not subjected to external force.

[0039] In other solutions, the limiting component 62 includes a ratchet rack 621, a connecting rod 622, a limiting rod 623, a pawl shaft 624, a pawl body 625, and a torsion spring 626. The ratchet rack 621 is slidably connected to the fixing mechanism 4 and is connected to the limiting rod 623 through the connecting rod 622. The lifting rod 611 is provided with several limiting holes 612, and the limiting rod 623 can be inserted into the limiting holes 612. The pawl shaft 624 is located in the fixing box 1, and the pawl body 625 is rotatably located on the pawl shaft 624 and is connected to the fixing box 1 through the torsion spring 626. The pawl body 625 can limit the ratchet rack 621 from moving towards the battery module. Specifically, the ratchet 621 is slidably connected to the clamping rack 421, and there is a strong friction between the ratchet 621 and the clamping rack 421. Through the friction between them, when the clamping rack 421 moves away from the base plate body 21, it can drive the ratchet 621 to move together. At the same time, the ratchet 621 drives the pawl body 625 to rotate continuously. When the clamping rack 421 moves towards the battery module, the pawl body 625 restricts the ratchet 621 from moving towards the battery module. The lifting rod 611 moves with the movement of the clamping rack 421. Therefore, the limiting rod 623, which is fixed to the ratchet 621 by the connecting rod 622, will be inserted into the limiting hole 612 to limit the height position of the lifting rod 611.

[0040] The aforementioned lithium battery module fixing device can fix battery modules of different lengths and sizes.

[0041] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A lithium battery module fixing device, characterized in that: Includes a fixed box, limit rod, base plate assembly, transmission assembly, fixing mechanism, and cover plate assembly; The fixed box is provided with a plurality of the aforementioned limiting rods. The base plate assembly is vertically and flexibly disposed at the bottom of the fixed box. The transmission assembly is slidably disposed within the fixed box. The descent of the base plate assembly can drive the transmission assembly to slide away from the base plate assembly. The fixing mechanism is slidably disposed inside the fixing box, and the movement of the transmission component can drive the fixing mechanism to move together; when the cover plate assembly closes the fixing box, it can drive the fixing mechanism to move towards the bottom plate assembly, while the transmission component remains stationary.

2. The lithium battery module fixing device according to claim 1, characterized in that: The base plate assembly includes a base plate body, a base plate spring, and a push block; the base plate body is vertically and elliptically mounted on the bottom surface of the fixed box via the base plate spring, and the push block is fixed to the side of the base plate body near the bottom surface of the fixed box; the descent of the push block can drive the transmission assembly to move.

3. The lithium battery module fixing device according to claim 2, characterized in that: The transmission assembly includes a sliding wedge, a sliding connecting rod, and a pushing rack; the sliding wedge is slidably connected to the bottom surface of the fixed box and is connected to the pushing rack through the sliding connecting rod, and the sliding of the pushing rack can drive the fixed mechanism to move.

4. A lithium battery module fixing device according to claim 3, characterized in that: The fixing assembly includes a driven assembly, a clamping assembly, and a driving assembly. The driven assembly includes a driven gear, a driven shaft, and an incomplete gear. The driven shaft is rotatably connected to the fixing box. The driven gear and the incomplete gear are coaxially fixed on the driven shaft. The driven gear meshes with the push rack. The clamping assembly is slidably connected to the fixing box. The rotation of the incomplete gear can drive the clamping assembly to slide. The driving assembly is rotatably disposed in the fixing box. The lifting and lowering of the cover plate assembly can drive the driving assembly to rotate. The rotation of the driving assembly can drive the clamping assembly to slide.

5. A lithium battery module fixing device according to claim 4, characterized in that: The clamping assembly includes a clamping rack, a driven rack, and a clamping plate; the clamping rack is slidably connected inside the fixed box, and the clamping rack can mesh with the incomplete gear; the driven rack and the fixed plate are respectively fixed on the clamping rack, the rotation of the driving assembly can drive the driven rack to slide, and the clamping plate can clamp the battery module.

6. A lithium battery module fixing device according to claim 5, characterized in that: The drive assembly includes a drive shaft, a drive gear, and a transmission gear; the drive shaft is rotatably connected to the fixed box, the drive gear and the transmission gear are coaxially fixed on the drive shaft, the transmission gear meshes with the driven rack, and the descent of the cover plate assembly can drive the drive gear to rotate.

7. A lithium battery module fixing device according to claim 6, characterized in that: The cover plate assembly includes a cover plate body and a cover plate rack; the cover plate rack is fixed on the cover plate body and can mesh with the drive gear.

8. A lithium battery module fixing device according to claim 1, characterized in that: It also includes a height limiting mechanism and a pushing wedge. The height limiting mechanism includes an upper baffle assembly and a limiting assembly. The upper baffle assembly is vertically mounted on the fixing mechanism. The pushing wedge is fixed in the fixing box. When the fixing mechanism moves away from the bottom plate assembly, the pushing wedge can raise the upper baffle assembly. The limiting assembly is mounted on the fixing assembly and can limit the height position of the upper baffle assembly.

9. A lithium battery module fixing device according to claim 8, characterized in that: The upper baffle assembly includes a lifting rod, a lifting connecting rod, and an upper baffle body; the lifting rod is slidably connected to the fixing mechanism and connected to the upper baffle body through the lifting connecting rod, and the limiting component can limit the height position of the lifting rod.

10. A lithium battery module fixing device according to claim 9, characterized in that: The limiting assembly includes a ratchet rack, a connecting rod, a limiting rod, a pawl shaft, a pawl body, and a torsion spring. The ratchet rack is slidably connected to the fixing mechanism and connected to the limiting rod via the connecting rod. The lifting rod has several limiting holes, and the limiting rod can be inserted into the limiting holes. The pawl shaft is located inside the fixing box, and the pawl body is rotatably mounted on the pawl shaft and connected to the fixing box via the torsion spring. The pawl body can limit the movement of the ratchet rack towards the battery module.

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