Battery pack battery replacement locking device, power battery and automobile

Abstract

This invention discloses a battery pack swapping locking device, a power battery, and an automobile, comprising: a cover, a locking component, a locking spring, a retaining plate, and a sealing anti-loosening plate. The locking component is disposed within the cover. The top of the locking component has a locking part that is detachably connected to the fixed position. The middle part of the locking component has a protrusion, and the locking spring is disposed between the protrusion and the retaining plate. The bottom of the locking component has an external spline, and the retaining plate has an internal spline that matches the external spline. The bottom of the retaining plate has a limiting hole along the circumferential direction. The sealing anti-loosening plate has a limiting block that matches the limiting hole. The sealing anti-loosening plate is connected to the bottom of the cover. Through the matching connection between the retaining plate and the locking component, the matching connection between the retaining plate and the sealing anti-loosening plate, and the fixed connection between the sealing anti-loosening plate and the cover, the axial rotation of the retaining plate is restricted, preventing axial rotation and loosening of the locking component, thereby improving the reliability of the locking performance.

Description

Technical Field

[0001] This invention relates to the field of new energy electric vehicle technology, and in particular to a battery pack swapping lock device, a power battery, and an automobile. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] The current charging mode for new energy vehicles has many inconveniences, such as low vehicle-to-charging-pile ratio, slow charging speed, and reduced battery life due to fast charging. Compared with charging, battery swapping can quickly replenish energy without affecting battery life. However, the existing battery swapping locking mechanism still has problems such as poor locking reliability, difficulty in sealing, difficulty in secondary loosening prevention, complex structure, and high failure rate.

[0004] Chinese patent CN207790296U discloses a battery pack locking mechanism, wherein the engaging part moves between a first position and a second position relative to the outer shell. In the first position, a portion of the engaging part extends out of the outer shell to interlock with the locking engagement member; in the second position, the engaging part retracts into the outer shell to unlock with the locking engagement member. The locking and unlocking process with the locking engagement member is realized by the back-and-forth movement of the engaging part.

[0005] However, in this solution, the engagement part may experience uneven movement or even jamming during operation due to factors such as the inclined structure and accumulated manufacturing tolerances, leading to engagement / unlocking failure and severely affecting the reliability of the product's locking mechanism. Furthermore, this solution lacks a sealing structure, allowing foreign objects such as mud, rainwater, and other debris to enter the locking mechanism from the lower part and the gap between the battery pack and the vehicle body during vehicle operation, affecting the performance of the locking mechanism.

[0006] Chinese patent CN106080159B discloses a lock body assembly, a power battery and its locking mechanism; the lock body mechanism in this solution is complex, with gaps in many places and no sealing design, which cannot prevent impurities such as mud and sand from damaging the lock body. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a battery pack swapping locking device, a power battery, and an automobile. By matching and connecting a locking plate with a locking component, matching and connecting the locking plate with a sealing anti-loosening plate, and fixing the sealing anti-loosening plate with a cover, the axial rotation of the locking plate is restricted, preventing axial rotation and loosening of the locking component, thereby improving the reliability of the locking performance.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a battery pack swapping locking device, comprising: a cover, a locking member, a locking spring, a locking plate, and a sealing anti-loosening plate, wherein the locking member is disposed inside the cover;

[0010] The top of the locking member is provided with a locking part that is detachably connected to the fixed position;

[0011] The locking member has a protrusion in the middle, and the locking spring is located between the protrusion and the locking plate.

[0012] The locking component has an external spline at its bottom, the locking plate has an internal spline that matches the external spline, and the bottom of the locking plate has a limiting hole along the circumferential direction. The sealing and anti-loosening plate has a limiting block that matches the limiting hole, and the sealing and anti-loosening plate is connected to the bottom of the cover.

[0013] As an alternative implementation, the top of the cover is provided with an outward flange, and the outer side of the outward flange is provided with a second external thread for connecting the sealing plate. The lower connecting surface of the outward flange contacts the upper surface of the protrusion when locked, and the upper connecting surface of the outward flange is connected to an external device.

[0014] As an alternative implementation, the sealing plate is provided with a second through hole, and the second through hole is provided with an internal thread that matches the second external thread.

[0015] As an alternative implementation, the sealing plate is provided with a first groove, and a first sealing strip is provided in the first groove, with the first sealing strip and the first groove being interference-fitted.

[0016] As an alternative implementation, the housing has an internal cavity structure, and the outer flange has a first through hole that penetrates the cavity structure. The first through hole is used to pass through the locking part of the locking member.

[0017] As an alternative implementation, the diameter of the cavity structure is not less than the diameter at the position of the protrusion in the middle of the locking member.

[0018] As an alternative implementation, the diameter of the first through hole is not less than the diameter of the locking portion at the top of the locking member, and is less than the diameter of the protruding portion in the middle of the locking member.

[0019] As an alternative implementation, the bottom of the cover is provided with a second protrusion, and the second protrusion is provided with a first connecting hole, through which the cover is connected to external equipment and a sealing anti-loosening plate.

[0020] As an alternative implementation, the bottom of the limiting hole is provided with an outer chamfer, the head of the limiting block is provided with a rounded corner, and the limiting hole and the limiting block are in clearance fit.

[0021] As an alternative implementation, a second groove is provided on the sealing and anti-loosening plate, and a second sealing strip is provided in the second groove, with an interference fit between the second sealing strip and the second groove.

[0022] Secondly, the present invention provides a power battery, including a battery pack and the battery pack battery swapping locking device described in the first aspect, wherein the battery pack battery swapping locking device is disposed on the side beam of the battery pack through a cover.

[0023] As an alternative implementation, the battery pack edge beam has a cavity structure, and the battery pack edge beam is provided with a third through hole and a fourth through hole. The fourth through hole is used to pass through the cover, and the third through hole is used to pass through the outer flange of the cover. The third through hole and the fourth through hole are connected through each other, and the outer flange passes through the battery pack edge beam and is threadedly connected to the sealing plate.

[0024] As an alternative implementation, the bottom connecting surface of the battery pack edge beam is provided with a third connecting hole to fix the battery pack edge beam and the cover.

[0025] Thirdly, the present invention provides an automobile including the power battery described in the second aspect.

[0026] As an alternative implementation, the vehicle also includes a vehicle body, and the power battery is fixed to the side beam of the vehicle body by a sealing plate. A first groove is provided at the connection surface between the sealing plate and the side beam of the vehicle body, and a first sealing strip is provided in the first groove. The first sealing strip and the first groove are interference-fitted.

[0027] As an alternative implementation, the locking part is detachably connected to the end nut of the vehicle body.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention proposes a battery pack swapping locking device, a power battery, and an automobile. The locking plate has an internal spline that mates with the external spline on the bottom of the locking component for axial positioning of the locking component. Simultaneously, the bottom of the locking plate has a limiting hole along the circumferential direction, and the sealing anti-loosening plate also has a limiting block matching the limiting hole, achieving axial connection between the sealing anti-loosening plate and the locking plate and restricting the axial rotation of the locking plate. Furthermore, the sealing anti-loosening plate is fixedly connected to the cover and the battery pack side beam by fasteners, effectively preventing axial rotation and loosening of the locking component and improving the reliability of the locking performance.

[0030] This invention proposes a battery pack swapping locking device, a power battery, and a car, with a structural design of a sealing plate, a first sealing strip, a sealing anti-loosening plate, and a second sealing strip. This design effectively prevents foreign objects such as mud, sand, and rainwater from entering the locking mechanism from the lower part and the gap between the battery pack and the car body during vehicle operation, thus affecting the performance of the locking mechanism and improving its dustproof and waterproof performance.

[0031] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0033] Figure 1 A cross-sectional view of the locked state of the battery pack swapping locking device provided in Embodiment 1 of the present invention;

[0034] Figure 2 This is a cross-sectional view of the unlocked state of the battery pack swapping locking device provided in Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram of the locking component structure provided in Embodiment 1 of the present invention;

[0036] Figure 4 This is an isometric view of the casing provided in Embodiment 1 of the present invention;

[0037] Figure 5 This is a schematic diagram of the casing structure provided in Embodiment 1 of the present invention;

[0038] Figure 6 This is a schematic diagram of the card plate structure provided in Embodiment 1 of the present invention;

[0039] Figure 7 This is a schematic diagram of the sealing plate structure provided in Embodiment 1 of the present invention;

[0040] Figure 8 This is a schematic diagram of the sealing and anti-loosening plate structure provided in Embodiment 1 of the present invention;

[0041] Figure 9 This is a schematic diagram of the battery pack side beam structure provided in Embodiment 2 of the present invention;

[0042] Figure 10 for Figure 9 AA cross-section view;

[0043] Among them, 1. Fixed position nut; 2. Body body side beam; 3. Battery pack side beam; 301-1. Top upper connecting surface; 301-2. Top lower connecting surface; 302. Third through hole; 303. Fourth through hole; 304. Third connecting hole; 305. Bottom connecting surface; 4. Cover; 401. First through hole; 402. Outer flange; 403. Second external thread; 404. Outer flange upper connecting surface; 405. Cavity structure; 406. Cover bottom upper connecting surface; 407. Cover bottom lower connecting surface; 408. First through hole; 409. Outer flange lower connecting surface; 410. First connecting hole; 5. Locking Components; 501, First external thread; 502, Upper surface of the protrusion; 503, Lower surface of the protrusion; 504, External spline; 6, Locking spring; 7, Clamping plate; 701, Internal spline; 702, Cylindrical hole; 703, External chamfer; 8, Sealing plate; 801, First groove; 802, Second through hole; 9, First sealing strip; 10, Sealing anti-loosening plate; 1001, Second through hole; 1002, Second groove; 1003, Second connecting hole; 1004, Cylindrical block; 1005, Rounded corner; 1006, Upper surface of sealing anti-loosening plate; 11, Second sealing strip; 12, Fastener; 13, Station-end servo gun sleeve. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0048] Example 1

[0049] like Figures 1-2As shown, this embodiment provides a battery pack swapping locking device, including: a cover 4, a locking component 5, a locking spring 6, a clamping plate 7, a sealing plate 8, and a sealing and anti-loosening plate 10;

[0050] The locking element 5 is located inside the cover 4;

[0051] The top of the locking member 5 is provided with a locking part that is detachably connected to the fixed position;

[0052] The locking member 5 has a protrusion in the middle, and the locking spring 6 is located between the protrusion and the card plate 7.

[0053] The locking member 5 has an external spline at its bottom, the locking plate 7 has an internal spline that matches the external spline, and the bottom of the locking plate 7 has a limiting hole along the circumferential direction. The sealing anti-loosening plate 10 has a limiting block that matches the limiting hole, and the sealing anti-loosening plate 10 is connected to the bottom of the cover 4.

[0054] In this embodiment, as Figure 3 As shown, the locking element 5 has a cross-shaped structure;

[0055] The locking part is provided with a first external thread 501, which is connected to the nut 1 at the fixed position through the first external thread 501 to fix the locking member 5 at the fixed position.

[0056] A protrusion is provided in the middle, and a locking spring 6 is provided between the lower surface 503 of the protrusion and the card plate 7. The lower surface 502 of the protrusion contacts the cover 4 when locked.

[0057] The bottom is provided with an external spline 504, which is connected to the internal spline 701 of the card plate 7 on one hand to axially position the locking part 5, and on the other hand to the station end servo gun sleeve 13 of the battery swapping station.

[0058] In this embodiment, as Figures 4-5 As shown, the inside of the cover 4 is provided with a cavity structure 405, and the locking member 5 is provided inside the cavity structure 405;

[0059] The top of the cover 4 is provided with an upward outward flange 402, and the outer side of the outward flange 402 is provided with a second external thread 403, which connects to the sealing plate 8. The lower connecting surface 409 of the outward flange on the bottom side of the outward flange 402 contacts the upper surface 502 of the protrusion when locked. The upper connecting surface 404 of the outward flange on the bottom side of the outward flange 402 contacts the external equipment to fix it to the external equipment.

[0060] The outer flange 402 is provided with a first through hole 401, which penetrates the cavity structure 405 and is used to pass through the locking part of the locking member 5 provided with the first external thread 501.

[0061] The bottom of the cover 4 is provided with a first through hole 408, which penetrates the cavity structure 405. The station servo gun sleeve 13 passes through the first through hole 408 and is connected to the external spline 504 at the bottom of the locking member 5.

[0062] The bottom of the cover 4 is provided with a second protrusion, and the second protrusion is provided with a first connecting hole 410. The cover 4 is connected to an external device through the first connecting hole 410. The upper connecting surface 406 of the bottom of the cover of the second protrusion contacts the external device to fix it to the external device. The lower connecting surface 407 of the bottom of the cover of the second protrusion contacts the sealing anti-loosening plate 10 and is fixedly connected to the first connecting hole 410 by fasteners 12.

[0063] As an alternative implementation, both the outer flange 402 and the second protrusion can be flange structures.

[0064] As an alternative implementation, the diameter of the cavity structure 405 is not less than the diameter of the part with the protrusion in the middle of the locking member 5.

[0065] As an alternative implementation, the diameter of the first through hole 401 is not less than the diameter of the locking portion at the top of the locking member 5, and is less than the diameter of the portion with the protrusion in the middle of the locking member 5.

[0066] In this embodiment, as Figure 6 As shown, an inner spline 701 is provided in the middle of the axis of the card plate 7, which is connected to the outer spline 504 of the locking member 5, and is used to achieve axial positioning of the locking member 5.

[0067] The bottom of the clamping plate 7 is provided with a ring of cylindrical holes 702 evenly distributed along the axial direction, and the sealing anti-loosening plate 10 is provided with a ring of cylindrical blocks 1004 evenly distributed along the axial direction. The cylindrical holes 702 and the cylindrical blocks 1004 are matched and connected to realize the axial connection between the sealing anti-loosening plate 10 and the clamping plate 7, and restrict the axial rotation of the clamping plate 7.

[0068] As an alternative implementation, in order to facilitate the connection between the cylindrical hole 702 and the cylindrical block 1004, the bottom of the cylindrical hole 702 is provided with an outer chamfer 703, the head of the cylindrical block 1004 is provided with a rounded corner 1005, and the cylindrical hole 702 and the cylindrical block 1004 are in clearance fit.

[0069] In this embodiment, as Figure 7 As shown, the sealing plate 8 has a second through hole 802 in the middle, and the second through hole 802 has an internal thread that matches the second external thread 403 of the cover 4, which is used to connect the sealing plate 8 and the cover 4.

[0070] The sealing plate 8 is connected to the cover 4 and fixed to the external device. A first groove 801 is provided at the connection surface between the sealing plate 8 and the external device, and a first sealing strip 9 is provided in the first groove 801.

[0071] As an alternative implementation, the first sealing strip 9 is made of rubber and is interference-fitted with the first groove 801 to ensure that it does not fall off during use.

[0072] In this embodiment, as Figure 8 As shown, the sealing anti-loosening plate 10 has a second through hole 1001 in the middle, and the station end servo gun sleeve 13 passes through the second through hole 1001 and is connected to the external spline 504 at the bottom of the locking member 5.

[0073] The upper surface 1006 of the sealing anti-loosening plate contacts the lower connecting surface 407 of the bottom of the cover. The four corners of the sealing anti-loosening plate 10 are provided with second connecting holes 1003. Through the first connecting hole 410 and the second connecting hole 1003, the sealing anti-loosening plate 10 and the cover 4 are fastened together by fasteners 12.

[0074] The sealing anti-loosening plate 10 is connected to the cover 4 and fixed to the external equipment. A second groove 1002 is provided at the connection surface between the sealing anti-loosening plate 10 and the external equipment. A second sealing strip 11 is provided in the second groove 1002. The second sealing strip 11 is pressed against the lower connection surface 407 at the bottom of the cover.

[0075] As an alternative implementation, the second sealing strip 11 is made of rubber and is interference-fitted with the second groove 1002 to ensure that it does not fall off during use.

[0076] In this embodiment, during locking, after the station-end servo gun sleeve 13 is connected to the external spline 504 at the bottom of the locking member 5, the station-end servo gun sleeve 13 passes through the first through hole 408 of the cover 4 and the second through hole 1001 of the sealing anti-loosening plate 10. The station-end servo gun sleeve 13 moves vertically upward, thereby pushing the clamping plate 7 to move vertically upward until the cylindrical hole 702 of the clamping plate 7 separates from the cylindrical block 1004 of the sealing anti-loosening plate 10. The locking spring 6 is further compressed, and the servo gun rotates, driving the station-end servo gun sleeve 13 to work, while moving vertically upward, thereby pushing the locking member 5 to move vertically upward until the upper surface 502 of the protrusion of the locking member 5 contacts the lower connecting surface 409 of the outer flange of the cover 4. The first external thread 501 of the locking part at the top of the locking member 5 is fastened to the fixed position nut 1, completing the locking. Figure 1 As shown.

[0077] After locking is completed, the station-end servo gun sleeve 13 retracts, and the clamping plate 7 moves vertically downward under the action of the locking spring 6 and its own gravity, realizing the reconnection of the cylindrical hole 702 and the cylindrical block 1004, and achieving secondary anti-loosening.

[0078] During unlocking, after the station-end servo gun sleeve 13 connects with the external spline 504 at the bottom of the locking component 5, the station-end servo gun sleeve 13 passes through the first through hole 408 of the cover 4 and the second through hole 1001 of the sealing anti-loosening plate 10. The station-end servo gun sleeve 13 moves vertically upward, pushing the clamping plate 7 to move vertically upward until the cylindrical hole 702 of the clamping plate 7 separates from the cylindrical block 1004 of the sealing anti-loosening plate 10. The locking spring 6 is further compressed, and the servo gun rotates in the opposite direction, driving the station-end servo gun sleeve 13 to work, while simultaneously moving vertically downward, thereby driving the locking component 5 to move vertically downward until the first external thread 501 of the locking part at the top of the locking component 5 disengages from the fixed position nut 1, thus achieving unlocking. Figure 2 As shown.

[0079] As a further implementation, all the above components are guaranteed to be coaxial during installation and use.

[0080] Example 2

[0081] This embodiment provides a power battery, including a battery pack and the battery pack swapping locking device described in Embodiment 1. The battery pack swapping locking device is mounted on the side beam 3 of the battery pack through a cover 4.

[0082] In this embodiment, as Figures 9-10 As shown, the battery pack edge beam 3 has a cavity structure. The battery pack edge beam 3 is provided with a third through hole 302 and a fourth through hole 303. The fourth through hole 303 is used to pass through the cover 4, and the third through hole 302 is used to pass through the outer flange 402 of the cover 4. The third through hole 302 and the fourth through hole 303 are connected. After passing through the battery pack edge beam 3, the outer flange 402 is threadedly connected to the sealing plate 8.

[0083] The bottom connecting surface 305 of the battery pack edge beam 3 has a third connecting hole 304 around its perimeter. Through the third connecting hole 304 and the first connecting hole 410, fasteners 12 are used to achieve a tight connection between the bottom connecting surface 305 of the battery pack edge beam 3 and the upper connecting surface 406 at the bottom of the cover.

[0084] The sealing anti-loosening plate 10 is provided with a second groove 1002 at the connection between it and the bottom connecting surface 305. A second sealing strip 11 is provided in the second groove 1002, and the second sealing strip 11 is pressed against the bottom connecting surface of the cover.

[0085] A first groove 801 is provided at the connection between the sealing plate 8 and the top upper connecting surface 301-1 of the battery pack edge beam 3, and a first sealing strip 9 is provided in the first groove 801; the top lower connecting surface 301-2 of the battery pack edge beam 3 is in contact with the upper connecting surface 404 of the outward flange.

[0086] In this embodiment, the installation process of the battery pack and the battery pack battery swapping locking device includes:

[0087] The locking member 5 is placed in the cavity structure 405 of the cover 4. The locking member 5 moves vertically upward until the upper surface 502 of the protrusion contacts the lower connecting surface 409 of the outer flange. The locking spring 6 is compressed and installed between the lower surface 503 of the protrusion of the locking member 5 and the upper surface of the clamping plate 7. The clamping plate 7 can move vertically up and down in the cavity structure 405.

[0088] The second sealing strip 11 is interference-fitted with the sealing anti-loosening plate 10. The second sealing strip 11 is pressed into the second groove 1002 and does not fall off. The sealing anti-loosening plate 10 drives the second sealing strip 11 to move vertically upward until the cylindrical block 1004 connects with the cylindrical hole 702 in the clamping plate 7. The clamping plate 7 continues to move vertically upward until the upper surface 1006 of the sealing anti-loosening plate contacts the lower connecting surface 407 of the bottom of the cover. The second sealing strip 11 is pressed tightly against the lower connecting surface 407 of the bottom of the cover, and the two are fixedly connected by fasteners 12.

[0089] The cover 4 drives the locking parts 5, locking spring 6, clamping plate 7, and sealing anti-loosening plate 10, which are already assembled in the cavity mechanism 405, to move vertically upward and pass through the fourth through hole 303 of the battery pack side beam 3. The outer flange 402 passes through the third through hole 302 and then contacts the battery pack side beam 3 at the connecting surface 404 on the outer flange and the connecting surface 406 on the bottom of the cover 4. Then, it is connected with the fastener 12.

[0090] The first sealing strip 9 is interference-fitted with the sealing plate 8. The first sealing strip 9 is pressed into the first groove 801 and does not fall off. The sealing plate 8 drives the first sealing strip 9 to pass vertically through the locking member 5 from top to bottom, and achieves a tight connection with the second external thread 403 in the cover 4 through the second through hole 802.

[0091] At this point, the battery pack swapping locking device and the battery pack side beam have been installed.

[0092] Example 3

[0093] This embodiment provides a car, including a car body and the power battery described in Embodiment 2, wherein the locking part is detachably connected to the car body.

[0094] In this embodiment, the power battery is fixed to the side beam 2 of the vehicle body by a sealing plate 8. A first groove 801 is provided at the connection surface between the sealing plate 8 and the side beam 2 of the vehicle body, and a first sealing strip 9 is provided in the first groove 801.

[0095] In this embodiment, the first external thread 501 provided on the locking part is connected to the end nut on the vehicle body to lock and fix the locking member to the vehicle body.

[0096] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A battery pack swapping locking device, characterized in that, include: The enclosure includes a locking element, a locking spring, a retaining plate, and a sealing anti-loosening plate, wherein the locking element is located inside the enclosure. The top of the locking member is provided with a locking part that is detachably connected to the fixed position; The locking member has a protrusion in the middle, and the locking spring is located between the protrusion and the locking plate. The bottom of the locking component is provided with an external spline, and the card plate is provided with an internal spline that matches the external spline, which is used to achieve axial positioning of the locking component. The bottom of the card plate is provided with a limiting hole along the circumferential direction, and the sealing anti-loosening plate is provided with a limiting block that matches the limiting hole, which is used to realize the axial connection between the sealing anti-loosening plate and the card plate and restrict the axial rotation of the card plate. The sealing anti-loosening plate is connected to the bottom of the cover to prevent the locking parts from rotating axially and loosening. The sealing anti-loosening plate is connected to the cover and fixed on the battery pack edge beam. A second groove is set at the connection between the sealing anti-loosening plate and the bottom connection surface of the battery pack edge beam. A second sealing strip is set in the second groove. The second sealing strip and the second groove are interference fit. The second sealing strip is pressed against the lower connection surface of the bottom of the cover. The top of the cover is provided with an outward flange, and the outer side of the outward flange is provided with a second external thread for connecting the sealing plate. The lower connecting surface of the outward flange contacts the upper surface of the protrusion when locked, and the upper connecting surface of the outward flange connects to the lower connecting surface of the top of the battery pack edge beam. The sealing plate is connected to the cover and fixed on the battery pack edge beam. A first groove is provided at the connection between the sealing plate and the upper connecting surface of the top of the battery pack edge beam. A first sealing strip is provided in the first groove, and the first sealing strip and the first groove are interference fit. During locking, after the external spline connection of the station-end servo gun sleeve is made, it passes through the cover and moves vertically upward, thereby pushing the clamping plate to move vertically upward until the limiting hole of the clamping plate separates from the limiting block of the sealing anti-loosening plate. The locking spring is compressed, and the station-end servo gun sleeve is driven to work by the rotation of the servo gun, while moving vertically upward, thereby pushing the locking part to move vertically upward until the upper surface of the protrusion of the locking part contacts the lower connecting surface of the outer flange of the cover. The locking part at the top of the locking part is connected to the fixed position, and the locking is completed. After locking is completed, the station servo gun sleeve retracts, and the clamping plate moves vertically downward under the action of the locking spring and its own gravity, and the limit hole reconnects with the limit block to achieve secondary anti-loosening. During unlocking, after the station-end servo gun sleeve is connected to the external spline, it passes through the cover and the sealing anti-loosening plate and moves vertically upward, pushing the clamping plate vertically upward until the limiting hole of the clamping plate separates from the limiting block of the sealing anti-loosening plate. The locking spring is compressed, and the station-end servo gun sleeve is driven to work by the reverse rotation of the servo gun. At the same time, it moves vertically downward, thereby driving the locking part to move vertically downward until the locking part at the top of the locking part is disengaged from the fixed position, thus achieving unlocking.

2. The battery pack battery replacement lockout device of claim 1, wherein, The sealing plate is provided with a second through hole, and the second through hole is provided with an internal thread that matches the second external thread.

3. The battery pack battery replacement lockout device of claim 1, wherein, The cover has a cavity structure inside, and a first through hole is provided at the outer flange, which is used to pass through the locking part of the locking member.

4. The battery pack battery replacement lockout device of claim 3, wherein, The diameter of the cavity structure is not less than the diameter of the protruding part in the middle of the locking member.

5. The battery pack battery replacement lockout device of claim 3, wherein, The diameter of the first through hole is not less than the diameter of the locking part at the top of the locking member, and is less than the diameter of the protruding part in the middle of the locking member.

6. The battery pack battery replacement lockout device of claim 1, wherein, The bottom of the cover is provided with a second protrusion, and the second protrusion is provided with a first connecting hole, through which the cover is connected to external equipment and a sealing anti-loosening plate.

7. A battery pack swapping locking device as described in claim 1, characterized in that, The bottom of the limiting hole is provided with an outer chamfer, and the head of the limiting block is provided with a rounded corner. The limiting hole and the limiting block are in clearance fit.

8. A power cell, characterized by It includes a battery pack and a battery pack swapping locking device as described in any one of claims 1-7, wherein the battery pack swapping locking device is disposed on the side beam of the battery pack through a cover.

9. A power cell as claimed in claim 8, characterised in that The battery pack edge beam has a cavity structure. The battery pack edge beam is provided with a third through hole and a fourth through hole. The fourth through hole is used to pass through the cover, and the third through hole is used to pass through the outer flange of the cover. The third through hole and the fourth through hole are connected through each other. After the outer flange passes through the battery pack edge beam, it is threadedly connected to the sealing plate.

10. A power cell as claimed in claim 8, characterised in that, The bottom connecting surface of the battery pack edge beam is provided with a third connecting hole to fix the battery pack edge beam to the cover.

11. An automobile characterized by comprising: Includes the power battery as described in any one of claims 8-10.

12. A vehicle as claimed in claim 11, wherein the vehicle is a car. The vehicle also includes a vehicle body, and the power battery is fixed to the side beam of the vehicle body by a sealing plate. A first groove is provided at the connection surface between the sealing plate and the side beam of the vehicle body, and a first sealing strip is provided in the first groove. The first sealing strip and the first groove are interference-fitted.

13. A vehicle as claimed in claim 12, wherein the vehicle is a car. The locking part is detachably connected to the end nut of the vehicle body.

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