Battery PACK heightening device

Abstract

The utility model discloses a battery PACK height adjusting device, which belongs to the technical field of batteries and comprises a tray and four height adjusting parts oppositely mounted at two edges of the upper end of the tray, each height adjusting part comprises a base fixedly connected with the tray, a sleeve, an adjusting rod, a supporting seat and a height selector, and the bottom of each sleeve is fixedly connected to the upper end face of the corresponding base. An arc-shaped adjusting channel is vertically formed in the middle of a sleeve body and horizontally penetrates through the sleeve, one end of an adjusting rod is fixedly connected with the bottom of the supporting base, and the other end of the adjusting rod penetrates through the upper end face of the sleeve to be arranged in the sleeve. The free end of the height selector penetrates through the adjusting channel to abut against the adjusting rod. The height adjusting part is arranged at the upper end of the tray to adjust the height, and the sleeve and the adjusting rod which are arranged on the base are matched with the height selector to adjust the height of the supporting seat so as to adjust the height of the PACK placing area and the upper structure.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery PACK height adjustment device. Background Technology

[0002] The battery pack system of an electric vehicle, through a sophisticated mechanical structure design, cleverly combines numerous individual cells in series and parallel connections, and integrates an advanced battery management system (BMS) and communication frame technology, achieving seamless interface with the vehicle's microcontroller (MCU). Given the precious space inside the vehicle, the power battery pack is often carefully placed in the chassis or under the vehicle body. While this design effectively utilizes space, it also exposes the power battery pack directly to the complex and ever-changing external operating environment. Therefore, implementing a comprehensive and effective protection strategy for the power battery is crucial when facing various harsh operating conditions and environments during vehicle operation. Dustproof and waterproof treatments are indispensable key elements of the power battery pack protection system. The effectiveness of dustproof and waterproof measures largely depends on the scientifically sound and rationally designed installation structure of the power battery pack.

[0003] The current design of lithium-ion battery pack assembly structures is quite complex. Furthermore, if the battery pack casing deforms, a properly designed pressure-holding structure is crucial to effectively resist potential battery damage or even explosion risks from localized impacts. Battery packs are now widely used in electric vehicles, and airtightness testing after assembly is an indispensable step to obtain accurate airtightness data. During airtightness testing, to prevent data distortion due to pack expansion during inflation, specialized pressure-holding fixtures must be installed on the pack to effectively constrain its expansion and ensure the stability of the test volume. Although there are existing fixture solutions on the market that use steel frames to limit pack expansion during testing, these solutions require manual installation and on-site height adjustment, lacking versatility and significantly limiting their application.

[0004] Existing technologies disclose some patents for battery module pressure-holding fixtures. Among them, the utility model patent with publication number CN219383201U discloses a battery module pressure-holding clamping and positioning tray, including a base. The base is provided with two sets of opposing movable clamping mechanisms or one set of movable clamping mechanisms and a fixed clamping mechanism opposite to it. Although the side plate clamping components can achieve clamping and pressure-holding positioning around the module, there are still problems in adapting to the specific requirements of different types of PACKs to apply pressure to the top cover during airtightness testing, which affects the efficiency and accuracy of airtightness testing of power battery PACKs. There are also many inconveniences in the processes of storage, machine gripping and installation.

[0005] In view of this, the inventors conducted in-depth research to address this need, which led to this case. Utility Model Content

[0006] To overcome the limitations of existing technologies in airtightness testing, which struggle to adapt to the specific pressure requirements of different types of PACKs on the top cover, thus affecting the efficiency and accuracy of power battery PACK airtightness testing, and to address the numerous inconveniences in storage, machine handling, and installation processes, this invention provides a battery PACK height adjustment device. The device includes a tray and four height adjustment sections mounted opposite each other on the upper edges of the tray. Each height adjustment section includes a base, a sleeve, an adjusting rod, a support base, and a height selector, all fixedly connected to the tray. The bottom of the sleeve is fixedly connected to the upper surface of the base. An arc-shaped adjustment channel is vertically formed in the middle of the sleeve, horizontally penetrating the sleeve. One end of the adjusting rod is fixedly connected to the bottom of the support base, and the other end passes through the upper surface of the sleeve and is positioned inside the sleeve. The height selector is rotatably connected to the upper surface of the base near the sleeve, with its free end passing through the adjustment channel and abutting against the adjusting rod.

[0007] The height is adjusted by setting a height adjustment section on the upper end of the tray. The height of the support base can be adjusted by using a sleeve and adjustment rod set on the base in conjunction with a height selector to adjust the height of the PACK placement area and the upper structure. When performing airtightness tests on the PACK, the height of the support base can be freely adjusted up and down to meet the pressure requirements of different types of PACKs on the top cover.

[0008] Furthermore, the height selector includes an arc-shaped adjustment plate and a height adjustment component. The arc-shaped adjustment plate matches the adjustment channel. An auxiliary plate is integrally provided at either end of the arc-shaped adjustment plate. The free end of the auxiliary plate is rotatably connected to the base via a rotating fixed axis. An adjustment handle is installed on the arc-shaped adjustment plate close to the auxiliary plate. The height adjustment component is fixedly provided on the upper surface of the arc-shaped adjustment plate opposite to the adjustment handle. The height adjustment component abuts against the adjustment rod.

[0009] The above technical solution involves vertically opening an arc-shaped adjustment channel in the middle of the sleeve body, and setting an arc-shaped adjustment plate in conjunction with the arc-shaped adjustment channel. An adjustment piece is set at the end of the arc-shaped adjustment plate to abut against the adjustment rod. By adjusting the abutment position of the adjustment piece on the arc-shaped adjustment plate against the adjustment rod, the height of the support seat can be adjusted, thereby achieving free adjustment of the sleeve height to adapt to the height of different PACKs.

[0010] Furthermore, the radius lines of the auxiliary plate and the arc-shaped adjustment plate coincide, and the upper surface of the base is provided with a plurality of adjustment holes on the rotation trajectory of the joint handle with the rotation axis as the fixed point. The adjustment handle passes through the auxiliary plate and abuts against the adjustment holes.

[0011] Through the above technical solution, the arc-shaped adjustment plate and the base are relatively fixed by setting a rotation axis at the free end of the auxiliary plate, and the radius lines of the auxiliary plate and the arc-shaped adjustment plate are aligned. This allows the arc-shaped adjustment plate to rotate around the rotation axis on the base by rotating the adjustment handle, thereby adjusting the contact position between the height adjustment component and the adjustment rod in the adjustment channel. Furthermore, the setting of the adjustment hole ensures that the position of the rotated arc-shaped adjustment plate is fixed, limiting the adjusted state.

[0012] Furthermore, the height adjustment component includes a plurality of height adjustment platforms, the height of which decreases in a stepped manner from the free end of the arc-shaped adjustment plate to the rotation axis.

[0013] Through the above technical solution, several height adjustment platforms with a stepped decrease in height from the outside to the inside are set at the free end of the arc-shaped adjustment plate. When the adjustment handle is pulled up and the arc-shaped adjustment plate is rotated around the fixed axis of rotation, different height adjustment platforms can be selected to abut against the adjustment component as needed, which facilitates more height selection and makes the adjustment more precise.

[0014] Furthermore, a limiting through hole is vertically formed on the adjusting rod, and the limiting through hole horizontally penetrates the adjusting rod body. A pin hole is formed at the upper end of the sleeve wall corresponding to the limiting through hole, and a pin is provided through the pin hole and the limiting through hole.

[0015] Furthermore, a pressure-holding fixture is provided at the upper end of the tray, and the pressure-holding fixture abuts against the support base. A counterweight pin is provided at the edge of the pressure-holding fixture corresponding to the support base.

[0016] Furthermore, the upper surface of the support base is provided with an abutment groove, and the counterweight pin abuts against the abutment groove.

[0017] With the above technical solution, an abutment groove is provided on the upper end face of the support base located below the pressure holding fixture, which makes it easy for the counterweight pin set on the pressure holding fixture to be inserted into the interior of the abutment groove and abut against each other, making the connection between the two more stable.

[0018] Furthermore, a retaining ring is fixedly provided on the outer side of the bottom of the sleeve, and the retaining ring is fixedly connected to the base by bolts.

[0019] The above technical solution involves fixing a retaining ring on the outer wall of the bottom of the sleeve, which secures the sleeve to the base, making the connection between the sleeve and the base more stable and secure.

[0020] Furthermore, the upper end of the adjusting handle is fixedly connected to the arc-shaped adjusting plate, the rotating fixed axis is fixedly connected to the base, and the auxiliary plate is rotatably connected to the rotating fixed axis.

[0021] Furthermore, several fixing holes are provided at the edge of the base, and the base and the tray are fixed by fixing bolts, with the fixing holes matching the fixing bolts.

[0022] The beneficial effects of adopting the technical solution of this utility model are as follows:

[0023] (1) By adding a height adjustment section to the upper part of the tray, combined with the sleeve and adjustment rod on the base, and with the height selector, the height of the support seat can be flexibly adjusted. This design allows the distance between the PACK placement area and the pressure-holding fixture above to be freely adjustable, so that when conducting airtightness testing on the PACK, it can easily adapt to the specific requirements of different types of PACKs to apply pressure to the top cover, greatly improving the compatibility and accuracy of the test, optimizing the effective protection of the power battery PACK under different operating environments, adapting to the airtightness testing requirements of diverse PACK sizes, and significantly improving the storage efficiency of the fixture and the convenience of automated gripping and installation.

[0024] (2) The ingenious combination of the support base, sleeve, and annular height selector not only meets the limit requirements of PACKs of different heights, but also makes the adjustment process simple, quick, and easy to operate. By adjusting the height selector and the adjusting rod inside the sleeve, the appropriate height can be quickly set, ensuring the stability and safety of the PACK during the testing process.

[0025] (3) The tooling structure design of this application is simple and clear, which facilitates assembly and production, effectively reduces production costs, and improves production efficiency. At the same time, the tooling has strong adaptability to PACKs and can significantly improve the yield rate of PACKs. More importantly, this design enhances the flexibility of producing different types of PACKs, truly realizing "one tooling for multiple uses", that is, one tooling can meet the testing needs of multiple PACKs, greatly improving the utilization rate of equipment and the convenience of testing. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is an installation diagram of a battery pack height adjustment device according to this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of a battery PACK height adjustment device according to this utility model;

[0029] Figure 3 This is a schematic diagram of a height selector for a battery pack height adjustment device according to a utility model.

[0030] Figure 4 This is a schematic diagram of the structure of a novel pressure-holding tool and tray used in a battery pack according to this utility model;

[0031] Figure 5 This is the structural design intent of the pressure-holding fixture;

[0032] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0033] In the diagram: 1. Tray; 2. Height adjustment section; 3. Base; 4. Sleeve; 5. Adjusting rod; 6. Support seat; 7. Height selector; 8. Adjustment channel; 9. Arc-shaped adjustment plate; 10. Height adjustment component; 11. Auxiliary plate; 12. Rotary fixed axis; 13. Adjustment handle; 14. Adjustment hole; 15. Height adjustment platform; 16. Limiting through hole; 17. Pin hole; 18. Pressure holding fixture; 19. Abutment groove; 20. Counterweight pin; 21. Fixing ring; 22. Fixing hole; 23. Pad; 24. Body plate; 25. Limiting plate; 26. Support prism; 27. Counterweight plate; 28. Connecting block; 29. ​​Mounting groove; 30. Positioning pin; 31. Mounting seat; 32. Limiting strip. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0035] This embodiment uses a height adjustment feature on the upper part of the tray to adjust the height. A sleeve and adjusting rod on the base, along with a height selector, adjust the height of the support base to adjust the height of the PACK placement area relative to the upper structure. During airtightness testing of the PACK, the height of the support base can be freely adjusted up and down to accommodate the pressure requirements of different PACKs on the top cover. The specific implementation method is as follows:

[0036] like Figure 1-6As shown, a battery pack height adjustment device includes a tray 1 and four height adjustment parts 2 installed opposite each other on the two upper edges of the tray 1. Each height adjustment part 2 includes a base 3, a sleeve 4, an adjusting rod 5, a support 6, and a height selector 7, which are fixedly connected to the tray 1. The bottom of the sleeve 4 is fixedly connected to the upper surface of the base 3. An arc-shaped adjustment channel 8 is vertically opened in the middle of the sleeve 4 and horizontally passes through the sleeve 4. One end of the adjusting rod 5 is fixedly connected to the bottom of the support 6, and the other end passes through the upper surface of the sleeve 4 and is placed inside the sleeve 4. The height selector 7 is rotatably connected to the upper surface of the base 3 near the sleeve 4. The free end of the height selector 7 passes through the adjustment channel 8 and abuts against the adjusting rod 5.

[0037] Here, the height is adjusted by setting a height adjustment part 2 on the upper end of the tray 1. The height of the support base 6 is adjusted by using the sleeve 4 and the adjustment rod 5 set on the base 3 in conjunction with the height selector 7 to adjust the height of the PACK placement area and the upper structure. When performing airtightness testing on the PACK, the height of the support base 6 can be freely adjusted up and down to meet the pressure requirements of different types of PACKs on the top cover.

[0038] In a preferred embodiment, the height selector 7 includes an arc-shaped adjustment plate 9 and a height adjustment component 10. The arc-shaped adjustment plate 9 is matched with the adjustment channel 8. An auxiliary plate 11 is integrally provided at either end of the arc-shaped adjustment plate 9. The free end of the auxiliary plate 11 is rotatably connected to the base 3 through a rotating fixed shaft 12. An adjustment handle 13 is installed on the arc-shaped adjustment plate 9 close to the auxiliary plate 11. The height adjustment component 10 is fixedly provided on the upper end face of the arc-shaped adjustment plate 9 away from the adjustment handle 13. The height adjustment component 10 abuts against the adjustment rod 5.

[0039] Here, an arc-shaped adjustment channel 8 is vertically opened in the middle of the sleeve 4, and an arc-shaped adjustment plate 9 is set in conjunction with the arc-shaped adjustment channel 8. An adjustment piece 10 is set at the end of the arc-shaped adjustment plate 9 to abut against the adjustment rod 5. The height of the support seat 6 is adjusted by adjusting the abutment position of the adjustment piece 10 on the arc-shaped adjustment plate 9 and the adjustment rod 5, so as to freely adjust the height of the sleeve 4 to adapt to the height of different PACKs.

[0040] In a preferred embodiment, the radius lines of the auxiliary plate 11 and the arc-shaped adjustment plate 9 coincide. The upper surface of the base 3 is provided with several adjustment holes 14 on the rotation trajectory of the handle with the rotation axis 12 as the fixed point. The adjustment handle 13 passes through the auxiliary plate 11 and abuts against the adjustment holes 14.

[0041] Here, the arc-shaped adjusting plate 9 and the base 3 are relatively fixed at the free end of the auxiliary plate 11 by setting a rotation axis 12, and the radius lines of the auxiliary plate 11 and the arc-shaped adjusting plate 9 are aligned. This allows the arc-shaped adjusting plate 9 to rotate around the rotation axis 12 on the base 3 by adjusting the handle 13, thereby adjusting the contact position between the height adjusting member 10 and the adjusting rod 5 in the adjusting channel 8. Furthermore, the setting of the adjusting hole ensures that the position of the rotated arc-shaped adjusting plate 9 is fixed, limiting the adjusted state.

[0042] In one preferred embodiment, the height adjustment component 10 includes a plurality of height adjustment platforms 15, the height of which decreases in a stepped manner from the free end of the arc-shaped adjustment plate 9 to the rotation fixed axis 12.

[0043] Here, several height adjustment platforms 15 are set at the free end of the arc-shaped adjustment plate 9, with the height decreasing in a stepped manner from the outside to the inside. When the adjustment handle 13 is pulled up and the arc-shaped adjustment plate 9 is rotated around the fixed axis of rotation 12, different height adjustment platforms 15 can be selected to abut against the adjustment component as needed, so as to facilitate more height selection and make the adjustment more precise.

[0044] In a preferred embodiment, a limiting through hole 16 is vertically provided on the adjusting rod 5, and the limiting through hole 16 horizontally penetrates the rod body of the adjusting rod 5. A pin hole 17 is provided at the upper end of the sleeve 4 corresponding to the limiting through hole 16, and a pin is provided through the pin hole 17 and the limiting through hole 16.

[0045] Here, a horizontal limiting through hole 16 is made longitudinally on the adjusting rod 5. After the height of the support base 6 is adjusted, a suitable pin is inserted into both the pin hole 17 and the limiting through hole 16. This can prevent the adjusting rod 5 from rotating inside the sleeve 4, making their connection more stable.

[0046] In a preferred embodiment, a pressure-holding fixture 18 is provided on the upper end of the tray 1, and the pressure-holding fixture 18 abuts against the support seat 6. A counterweight pin 20 is provided at the edge of the pressure-holding fixture 18 corresponding to the support seat 6.

[0047] Here, the distance between the pressure holding fixture 18 and the tray 1 is adjusted by the support seat 6 set on the tray 1, so that the pressure holding fixture 18 is a certain distance from the battery PACK. This is suitable for providing a limiting function in situations where it is not necessary to press down the top cover of the battery PACK. By adjusting the height of the support seat 6, the tray 1 can be adapted to pressure holding fixtures 18 of different types of PACK heights.

[0048] In a preferred embodiment, the upper end face of the support base 6 is provided with an abutment groove 19, and the counterweight pin 20 abuts against the abutment groove 19.

[0049] Here, an abutment groove 19 is provided on the upper surface of the support base 6 located below the pressure holding fixture 18, which facilitates the counterweight pin 20 set on the pressure holding fixture 18 to be inserted into the interior of the abutment groove 19 to abut against each other, making the connection between the two more stable.

[0050] Here, the pressure-holding fixture 18 includes a rectangular pad 23, several body plates 24, a limiting plate 25, and a counterweight plate 27. Several body plates 24 are laid at the bottom of the pad 23. Several supporting prisms 26 are intersectingly laid on the upper surface of the pad 23. The upper center of the pad 23 is connected to the counterweight plate 27 via the limiting plate 25. The counterweight plate 27 has a rectangular hole in the center. The bottom of the limiting seat is fixedly connected to the supporting prisms 26. The upper end of the limiting plate 25 is fixedly connected to the counterweight plate 27 via a connecting block 28. The pad 23 has two phases... A base plate is laid on the upper edge of each plate. A pair of outward-facing U-shaped mounting grooves 29 are symmetrically opened on the same edge of both the base plate and the pad 23. A positioning pin 30 with a counterweight is provided at the upper end of each mounting groove 29, and an inverted conical abutment block abuts against the abutment groove 19 at the bottom of the positioning pin 30. Mounting seats 31 are symmetrically installed on two adjacent edges of the opening of the mounting groove 29. A support shaft is mounted on each of the two mounting seats 31 and is rotatably connected to them. The positioning pin 30 is sleeved in the middle of the support shaft. A fixed seat is installed on one mounting seat 31, and a limiting groove is fixedly connected to the other mounting seat 31. A limiting strip 32 is rotatably connected to the fixed seat, and the other end of the limiting strip 32 is engaged with the limiting groove.

[0051] In a preferred embodiment, a fixing ring 21 is fixedly provided on the outer side of the bottom of the sleeve 4, and the fixing ring 21 is fixedly connected to the base 3 by bolts.

[0052] Here, a fixing ring 21 is fixed on the bottom outer wall of the sleeve 4, and the sleeve 4 is fixed to the base 3 by the fixing ring 21, so that the connection between the sleeve 4 and the base 3 is more stable and firm.

[0053] In a preferred embodiment, the upper end of the adjusting handle 13 is fixedly connected to the arc-shaped adjusting plate 9, the rotating fixed shaft 12 is fixedly connected to the base 3, and the auxiliary plate 11 is rotatably connected to the rotating fixed shaft 12.

[0054] Here, the fixed axis of rotation 12 is fixedly connected to the base 3, and the auxiliary plate 11 is rotatably connected to the fixed axis of rotation 12, which ensures that the free end of the arc-shaped adjustment plate 9 rotates more smoothly in the adjustment channel 8.

[0055] In a preferred embodiment, the base 3 has several fixing holes 22 at its edge, and the base 3 is fixed to the tray 1 by fixing bolts, with the fixing holes 22 matching the fixing bolts.

[0056] Here, several fixing holes 22 are provided at the edge of the base 3. Fixing bolts pass through the fixing holes 22 to fix the base 3 to the upper end face of the tray, making the connection between the base 3 and the tray 1 more stable.

[0057] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack height adjustment device, characterized in that, The device includes a tray (1) and four height adjustment parts (2) installed opposite each other on the two upper edges of the tray (1). Each height adjustment part (2) includes a base (3) fixedly connected to the tray (1), a sleeve (4), an adjusting rod (5), a support (6), and a height selector (7). The bottom of the sleeve (4) is fixedly connected to the upper surface of the base (3). An arc-shaped adjustment channel (8) is vertically opened in the middle of the sleeve (4). The arc-shaped adjustment channel (8) passes horizontally through the sleeve (4). One end of the adjusting rod (5) is fixedly connected to the bottom of the support (6), and the other end passes through the upper surface of the sleeve (4) and is placed inside the sleeve (4). The height selector (7) is rotatably connected to the upper surface of the base (3) near the sleeve (4). The free end of the height selector (7) passes through the adjustment channel (8) and abuts against the adjusting rod (5).

2. The battery pack height adjustment device according to claim 1, characterized in that, The height selector (7) includes an arc-shaped adjustment plate (9) and a height adjustment component (10). The arc-shaped adjustment plate (9) is matched with the adjustment channel (8). An auxiliary plate (11) is integrally provided at one end of the arc-shaped adjustment plate (9). The free end of the auxiliary plate (11) is rotatably connected to the base (3) through a rotating fixed axis (12). An adjustment handle (13) is installed on the arc-shaped adjustment plate (9) close to the auxiliary plate (11). The height adjustment component (10) is fixedly provided on the upper surface of the arc-shaped adjustment plate (9) away from the adjustment handle (13). The height adjustment component (10) abuts against the adjustment rod (5).

3. The battery pack height adjustment device according to claim 2, characterized in that, The radius line of the auxiliary plate (11) coincides with that of the arc-shaped adjustment plate (9). The upper surface of the base (3) is provided with several adjustment holes (14) on the rotation trajectory of the joint handle with the rotation axis (12) as the fixed point. The adjustment handle (13) passes through the auxiliary plate (11) and abuts against the adjustment holes (14).

4. A battery pack height adjustment device according to claim 2, characterized in that, The height adjustment component (10) includes a plurality of height adjustment platforms (15), and the height of the plurality of height adjustment platforms (15) decreases in a stepped manner from the free end of the arc-shaped adjustment plate (9) to the rotation fixed axis (12).

5. A battery pack height adjustment device according to claim 1, characterized in that, The adjusting rod (5) has a vertically extending limit hole (16) that extends horizontally through the adjusting rod (5). The upper end of the sleeve (4) has a pin hole (17) corresponding to the limit hole (16), and a pin is provided through the pin hole (17) and the limit hole (16).

6. The battery pack height adjustment device according to claim 1, characterized in that, The upper end of the tray (1) is provided with a pressure holding fixture (18), and the pressure holding fixture (18) abuts against the support base (6). A counterweight pin (20) is provided at the edge of the pressure holding fixture (18) corresponding to the support base (6).

7. A battery pack height adjustment device according to claim 6, characterized in that, The upper surface of the support base (6) is provided with an abutment groove (19), and the counterweight pin (20) abuts against the abutment groove (19).

8. A battery pack height adjustment device according to claim 1, characterized in that, A fixing ring (21) is fixedly provided on the outer side of the bottom of the sleeve (4), and the fixing ring (21) is fixedly connected to the base (3) by bolts.

9. A battery pack height adjustment device according to claim 3, characterized in that, The upper end of the adjustment handle (13) is fixedly connected to the arc-shaped adjustment plate (9), the rotating fixed axis (12) is fixedly connected to the base (3), and the auxiliary plate (11) is rotatably connected to the rotating fixed axis (12).

10. A battery pack height adjustment device according to claim 1, characterized in that, The base (3) has several fixing holes (22) at its edge. The base (3) and the tray (1) are fixed by fixing bolts. The fixing holes (22) are matched with the fixing bolts.

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