Modular quick battery swap device and vehicle

Abstract

The application provides a modular quick battery replacement device and a vehicle, the modular quick battery replacement device comprising a vehicle body locking module and a battery locking module, the vehicle body locking module comprising a fixing pin, the fixing pin having an increased outer diameter at the end along the axial direction to form a fixing head; the battery locking module comprising a base, an elastic locking sleeve and a locking driving shaft, the elastic locking sleeve being installed at the upper part of a through cavity of the base, and the locking driving shaft being slidingly installed at the lower part of the through cavity; the elastic locking sleeve having a first locking cavity and a sleeve sidewall capable of changing the inner diameter of the first locking cavity; the locking driving shaft having a second locking cavity and a locking structure for extruding the sleeve sidewall to shrink; and the locking driving shaft and the base being provided with a limiting structure for locking the position of the locking driving shaft. In the application, the elastic locking sleeve and the fixing pin are used to cooperate with the locking structure, the contact and cooperation area is increased, the structure is not easy to be damaged, and the reliability of the connection between the power battery and the vehicle body is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle power battery technology, and more particularly to a modular fast battery swapping device and a vehicle. Background Technology

[0002] As the power source of new energy vehicles, the power battery is one of the most important components. Fast battery swapping technology ensures that the power battery can be replaced when its energy is depleted or damaged. Fast battery swapping technology requires a reliable and detachable connection structure between the power battery and the vehicle body to prevent mechanical failures that could affect safety, such as detachment or movement of the battery during driving, while also ensuring the structure can be repeatedly disassembled.

[0003] In existing technologies, the connection structure of vehicle-mounted power batteries typically uses threads or locking steel balls as locking mechanisms to lock the power battery to the vehicle body. However, both threads and locking steel balls are easily damaged. The connection structure using locking steel balls achieves locking through point contact of the locking balls, but repeated point contact over a long period can easily cause structural damage, leading to uncontrollable clamping force and gaps in certain directions that can cause the power battery to shift, resulting in low reliability of the connection between the power battery and the vehicle body. Summary of the Invention

[0004] The purpose of this invention is to provide a modular fast battery swapping device and vehicle to solve the technical problem in the prior art where the connection structure between the power battery and the vehicle body uses a locking steel ball that is easily damaged, resulting in low reliability of the connection between the power battery and the vehicle body.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides a modular fast battery swapping device, including a vehicle body locking module and a battery locking module. The vehicle body locking module includes a fixing pin, and the outer diameter of the fixing pin increases along the axial direction to form a fixing head.

[0007] The battery locking module includes a base, an elastic locking sleeve, and a locking drive shaft. The base has a through cavity, the elastic locking sleeve is installed on the upper part of the through cavity, and the locking drive shaft is slidably installed on the lower part of the through cavity.

[0008] The elastic locking sleeve has a first locking cavity through which the fixing pin can pass, and a sleeve sidewall that can extend and retract to change the inner diameter of the first locking cavity under the action of external force.

[0009] The locking drive shaft has a second locking cavity into which the fixing head can be inserted, and a locking structure for squeezing the sidewall of the jacket to retract;

[0010] A limiting structure for locking the position of the locking drive shaft is provided between the locking drive shaft and the base.

[0011] Furthermore, the outer side of the elastic locking sleeve is provided with a tapered portion, and the locking structure is an inverted tapered portion provided at the upper end of the second locking cavity.

[0012] Furthermore, a limiting step is provided at the upper opening of the cavity, an upper limit part for abutting against the limiting step is provided at the upper outer side of the elastic locking sleeve, a lower limit part is provided at the lower outer side of the elastic locking sleeve, and a fixed spring for abutting against the lower limit part and being in a compressed state is provided in the second locking cavity.

[0013] Furthermore, the jacket sidewall is provided with a plurality of expansion grooves spaced apart along the axial direction.

[0014] Furthermore, the fixing pin has a frustum portion, and the upper opening of the cavity has a trapezoidal opening into which the frustum portion can be inserted and tightly fitted, and the lower inner diameter of the trapezoidal opening narrows to form the limiting step.

[0015] Furthermore, the limiting structure includes an internal thread disposed on the inner wall of the cavity and an external thread disposed on the outer wall of the locking drive shaft.

[0016] Furthermore, the upper end of the first locking cavity is provided with an upper conical opening to facilitate the insertion of the fixing pin, and the lower end of the first locking cavity is provided with a lower conical opening.

[0017] Furthermore, the lower end of the locking drive shaft is provided with a polygonal groove, and the lower end of the base is provided with an operating hole for exposing the polygonal groove.

[0018] Furthermore, the vehicle body locking module also includes a vehicle body fixing block, and the fixing pin is installed and fixed to the vehicle body fixing block.

[0019] A vehicle includes a body, a power battery, and the aforementioned modular fast battery swapping device, wherein a body locking module of the modular fast battery swapping device is fixed to the body, and a battery locking module of the modular fast battery swapping device is fixed to the power battery.

[0020] The advantages of the modular fast battery swapping device and vehicle provided by this invention are as follows:

[0021] The modular fast battery swapping device includes a body locking module and a battery locking module. The body locking module includes a fixing pin, and the battery locking module includes a base, a flexible locking sleeve, and a locking drive shaft. The end of the compressed flexible locking sleeve abuts against the fixing head to achieve locking. The locking or unlocking of the fixing pin is achieved by the extension and retraction of the special flexible locking sleeve, which can quickly lock or unlock the power battery and the vehicle body. When the power battery needs to be replaced, the original power battery is unlocked and removed from the vehicle body, and then the new power battery is installed and locked to the vehicle body. The locking structure of the flexible locking sleeve and the fixing pin increases the contact and mating area, making it less prone to structural damage and gaps. It is also less likely to develop gaps during long-term use, reducing the possibility of power battery movement due to gaps and improving the reliability of the connection between the power battery and the vehicle body. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of a modular fast battery swapping device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the elastic locking sleeve in an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of the unlocked state of a modular fast battery swapping device according to an embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional view of the locked state of a modular fast battery swapping device according to an embodiment of the present invention.

[0027] The following are the labeling elements in the figure:

[0028] 1-Body locking module; 11-Fixing pin; 111-Fixing head; 112-Frustum section; 12-Body fixing block;

[0029] 2-Battery locking module; 21-Base; 211-Through cavity; 212-Limiting step; 213-Operating hole; 214-Trapezoidal opening; 22-Elastic locking sleeve; 221-First locking cavity; 222-Sleeve sidewall; 223-Locking structure; 2231-Upper limit part; 2232-Lower limit part; 2241-Upper conical opening; 2242-Lower conical opening; 225-Expansion groove; 23-Locking drive shaft; 231-Second locking cavity; 232-Polygonal groove (regular hexagonal groove); 233-Locking structure (inverted conical part); 24-Fixing spring. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Please refer to the following: Figures 1 to 4 The modular fast battery swapping device provided in this embodiment will now be described. The modular fast battery swapping device in this embodiment includes a vehicle body locking module 1 and a battery locking module 2. The vehicle body locking module 1 includes a fixing pin 11, and the outer diameter of the end of the fixing pin 11 along the axial direction increases to form a fixing head 111.

[0035] The battery locking module 2 includes a base 21, an elastic locking sleeve 22, and a locking drive shaft 23. The base 21 has a through cavity 211, the elastic locking sleeve 22 is installed on the upper part of the through cavity 211, and the locking drive shaft 23 is slidably installed on the lower part of the through cavity 211.

[0036] The elastic locking sleeve 22 has a first locking cavity 221 through which the fixing pin 11 can pass, and a sleeve sidewall 222 that can extend and retract under external force. The extension and retraction of the sleeve sidewall 222 can change the inner diameter of the first locking cavity 221.

[0037] The locking drive shaft 23 has a second locking cavity 231 into which the fixing head 111 can be inserted, and a locking structure 233 for compressing the retraction of the jacket sidewall 222. A limiting structure is provided between the locking drive shaft 23 and the base 21 to lock the position of the locking drive shaft 23.

[0038] The modular fast battery swapping device in this embodiment includes two stages during use:

[0039] (1) Installation stage, which is the process of fixing the power battery to the vehicle body. In this stage, the power battery needs to be fixed to the battery locking module 2 first, and then the battery locking module 2 fixed to the power battery and the vehicle body locking module 1 fixed to the vehicle body are mutually fixed and locked. The specific fixing and locking process is as follows: the fixing pin 11 is aligned with the base 21 of the battery locking module 2, the battery locking module 2 is pushed so that the fixing pin 11 is inserted into the through cavity 211 of the base 21, so that the fixing head 111 of the fixing pin 11 is inserted into and passes through the first locking cavity 221 of the elastic locking sleeve 22, and then the locking drive shaft 23 is slid upward so that the fixing head 111 enters the second locking cavity 231, and the locking structure 233 will squeeze the side wall 222 of the sleeve to shrink the inner diameter of the first locking cavity 221. At this time, the end of the compressed elastic locking sleeve 22 abuts against the fixing head 111. Finally, the position of the locking drive shaft 23 is locked by the limiting structure, thereby realizing the locking and fixing between the power battery and the vehicle body. When the locking structure 233 compresses the side wall 222 of the jacket, the inner diameter of the first locking cavity 221 shrinks after being compressed and contracted until it is smaller than the outer diameter of the fixing head 111. This prevents the fixing head 111 from retracting into the first locking cavity 221. Therefore, the contracted elastic locking jacket 22 restricts the position of the fixing head 111 within the second locking cavity 231. Figure 4 As shown in the figure, the locking between the fixing pin 11 and the base 21 is achieved, that is, the power battery is fixed to the vehicle body.

[0040] (2) Removal stage, which is the process of removing the power battery from the vehicle body. During this stage, the modular fast battery swapping device is already locked, and the battery locking module 2 and the vehicle body locking module 1 need to be unlocked. The specific unlocking process is as follows: release the locking structure from the locking drive shaft 23, slide the locking drive shaft 23 downwards, at this time the fixing head 111 disengages from the second locking cavity 231, and the locking structure 233 disengages from the jacket side wall 222. At this time, the jacket side wall 222 is not in a compressed state and can freely extend and retract, thereby releasing the lock on the fixing head 111, i.e. Figure 3 In the indicated state, the battery locking module 2 can be removed to replace the power battery. During the removal of the battery locking module 2, the retaining pin 11 is pulled outwards. As the retaining head 111 retracts into the first locking cavity 221, it pushes the side wall 222 of the jacket outwards to increase the inner diameter of the first locking cavity 221 until the retaining head 111 can pass through and leave. After the retaining head 111 is completely pulled out of the first locking cavity 221, the retaining head 111 is further pulled away from the base 21, thus unlocking and disengaging the retaining pin 11 from the base 21, ultimately removing the power battery from the vehicle body.

[0041] As can be seen from the above process, the modular fast battery swapping device in this embodiment relies on the extension and retraction of the elastic locking sleeve 22 to lock or unlock the fixing pin 11, which can quickly achieve the locking or unlocking between the power battery and the vehicle body. When the power battery needs to be replaced, the original power battery is unlocked and removed from the vehicle body, and then a new power battery is installed and locked to the vehicle body. The locking structure of the elastic locking sleeve 22 cooperating with the fixing pin 11 increases the contact and mating area, making it less prone to structural damage and gaps. It is also less likely to develop gaps after long-term use, reducing the possibility of power battery movement due to gaps, improving the reliability of the connection between the power battery and the vehicle body. Moreover, the disassembly and assembly process is simple to operate, reusable, and easy to maintain, which is conducive to achieving universality and reducing costs.

[0042] In one embodiment, such as Figures 1 to 4 As shown, a tapered portion 223 is provided on the outer side of the elastic locking sleeve 22, and the locking structure 233 is an inverted tapered portion 233 located at the upper end of the second locking cavity 231. During the upward movement of the locking drive shaft 23, the lower end of the elastic locking sleeve 22 inserts into the second locking cavity 231, and the inverted tapered portion 233 is in close contact with the tapered portion 223, converting the longitudinal movement force into a lateral compression force, causing the sleeve sidewall 222 to be compressed and contracted. In other embodiments, other locking structures 233 can also be used. For example, a ball bearing is provided on the inner wall of the second locking cavity 231. During the upward movement of the locking drive shaft 23, the ball bearing abuts against the tapered portion 223 and rolls, continuously compressing the sleeve sidewall 222, causing the inner diameter of the first locking cavity 221 to contract.

[0043] In one embodiment, such as Figure 3 As shown, a limiting step 212 is provided at the upper opening of the cavity 211 of the base 21. An upper limit portion 2231 is provided on the outer upper end of the elastic locking sleeve 22 to abut against the limiting step 212, and a lower limit portion 2232 is provided on the outer lower end of the elastic locking sleeve 22. A fixed spring 24, in a compressed state, is provided in the second locking cavity 231 to abut against the lower limit portion 2232. Under the action of the fixed spring 24, the elastic locking sleeve 22 is positioned against the upper end of the cavity 211. During the insertion and fixing of the fixing pin 11, the elastic locking sleeve 22 is pressed down and compresses the fixing spring 24, returning to its original position through the elastic force provided by the fixing spring 24. This provides a certain damping for the insertion of the fixing pin 11, reducing the impact noise generated when the fixing pin 11 is inserted.

[0044] In one embodiment, such as Figure 2 and Figure 3 As shown, the upper end of the first locking cavity 221 has an upper conical opening 2241 for easy insertion of the fixing pin 11, and the lower end of the first locking cavity 221 has a lower conical opening 2242. The inner diameter of the upper conical opening 2241 gradually decreases along the insertion direction of the fixing pin 11, which facilitates the insertion of the fixing head 111 by pushing the side wall of the sleeve 222 outward along the side wall of the upper conical opening 2241, so that the fixing head 111 can be smoothly inserted and pass through the first locking cavity 221. The lower conical opening 2242 is mirror-symmetrical to the upper conical opening 2241, which facilitates the insertion of the fixing head 111 by pushing the side wall of the sleeve 222 outward along the side wall of the lower conical opening 2242, so that the fixing head 111 can be smoothly retracted into the first locking cavity 221 and finally disengaged from the base 21, thereby unlocking the fixing pin 11.

[0045] In one embodiment, the structure of the elastic locking sleeve 22 can be varied. For example, it can be a metal structure or a resilient rubber structure, with sidewalls comprising multiple longitudinal sheet-like structures fixed by elastic clamps, etc. Specifically, such as... Figure 2 As shown, in this embodiment, the jacket sidewall 222 is provided with a plurality of expansion grooves 225 spaced apart along the axial direction. One end of each expansion groove 225 is connected to one end of the jacket sidewall 222, and two adjacent expansion grooves 225 are connected to different ends of the jacket sidewall 222. When the plurality of expansion grooves 225 are pulled open or squeezed, the inner diameter of the first locking cavity 221 can be changed.

[0046] In one embodiment, such as Figure 3As shown, in this embodiment, the limiting structure includes an internal thread on the inner wall of the cavity 211 of the base 21 and an external thread on the outer wall of the locking drive shaft 23. The internal and external threads mesh with each other. When the locking drive shaft 23 is rotated, the locking drive shaft 23 moves axially along the cavity 211 under the engagement of the threads. In other embodiments, the limiting structure can also be implemented using other structures. For example, a steel ball protruding outward by a spring is provided at the corresponding position of the cavity 211, and a limiting hole is opened on the locking drive shaft 23. When the locking drive shaft 23 moves to the locked position, that is, when the side wall 222 of the jacket is squeezed to the minimum contraction state, the steel ball is just embedded in the limiting hole, thereby achieving axial positioning of the locking drive shaft 23.

[0047] In one embodiment, such as Figure 3 As shown, a polygonal groove 232 is provided at the lower end of the locking drive shaft 23, and an operating hole 213 for exposing the polygonal groove 232 is provided at the lower end of the base 21. An external driving tool has a boss corresponding to the polygonal groove 232. The driving tool is inserted through the operating hole 213, causing the boss of the driving tool to embed into the polygonal groove 232. Rotating the driving tool at this time will drive the locking drive shaft 23 to rotate, thereby realizing the axial movement of the locking drive shaft 23 within the cavity 211. More specifically, in this embodiment, the polygonal groove 232 is a regular hexagonal groove 232, with its center located on the axis of the locking drive shaft 23. A corresponding hexagonal head is provided on the driving tool.

[0048] In one embodiment, such as Figure 1 and Figure 3 As shown, the fixing pin 11 in this embodiment has a frustum portion 112, which opens at the upper end of the cavity 211. The upper opening of the cavity 211 has a trapezoidal opening 214 into which the frustum portion 112 can be inserted and tightly fitted. The lower inner diameter of the trapezoidal opening 214 narrows to form a limiting step 212. The upper opening of the trapezoidal opening 214 is relatively large, which facilitates the insertion of the fixing head 111, while the frustum portion 112 can assist in the alignment and limiting of the fixing pin 11, which helps to achieve precise insertion of the fixing pin 11 into the first locking cavity 221.

[0049] In one embodiment, the vehicle body locking module 1 further includes a vehicle body fixing block 12, to which a fixing pin 11 is installed and fixed. The vehicle body fixing block 12 can be fixed to the vehicle body by multiple bolts. During use, if the fixing pin 11 is deformed or damaged, it is easy to disassemble and maintain, thereby improving the service life of the modular fast battery swapping device and reducing costs.

[0050] This embodiment also provides a vehicle, which includes a body and a power battery, and also includes the above-mentioned modular fast battery swapping device, wherein the body locking module 1 of the modular fast battery swapping device is fixed to the body, and the battery locking module 2 of the modular fast battery swapping device is fixed to the power battery.

[0051] Reference Figures 1 to 4 As shown, the battery swapping process for the vehicle in this embodiment includes:

[0052] Remove the original power battery: Insert the drive tool into the regular hexagonal groove 232 at the lower end of the locking drive shaft 23 through the operating hole 213. Rotate the drive tool to drive the locking drive shaft 23 to rotate. With the thread engagement, the locking drive shaft 23 moves downward along the through cavity 211 of the base 21 to the lower limit position. Figure 3 (As shown in the diagram). At this time, the fixing head 111 of the fixing pin 11 disengages from the second locking cavity 231. Due to the pushing force of the fixing spring 24, the elastic locking sleeve 22 remains at the upper end of the through cavity 211. The tapered part 223 of the elastic locking sleeve 22 disengages from the inverted tapered part 233 of the locking drive shaft 23, and the squeezing force on the side wall 222 of the sleeve disappears. Then, the battery locking module 2 with the power battery fixed is directly removed from the vehicle body. During the removal process, the fixing head 111 retracts from the lower tapered opening 2242 into the first locking cavity 221. By squeezing with the side wall of the lower tapered opening 2242, the side wall 222 of the sleeve expands outward, increasing the inner diameter of the first locking cavity 221, so that the fixing head 111 can disengage from the elastic locking sleeve 22. Finally, the entire fixing pin 11 is pulled out from the base 21, thereby realizing the removal of the power battery from the vehicle body.

[0053] Replacing the power battery: The new power battery is fixed to the battery locking module 2. Then, the battery locking module 2 is aligned with the mounting portion of the body locking module 1, and the fixing pin 11 is aligned with the opening of the cavity 211 of the base 21. The battery locking module 2 is then pushed to tightly engage with the body, thus locking the power battery to the body. During this process, the lower end of the fixing pin 11 is inserted into the cavity 211 of the base 21, and then enters and passes through the elastic locking sleeve 22. Since the upper end of the cavity 211 has an inverted trapezoidal portion 214, it facilitates the alignment of the fixing pin 11. After the fixing pin 11 is inserted, the inverted trapezoidal portion 214 fits and is positioned against the frustum portion 112 of the fixing pin 11. During the downward insertion of the fixing pin 11, the fixing head 111 enters the upper conical opening 2241 at the upper end of the first locking cavity 221, and presses down the elastic locking sleeve 22, providing a certain impact buffer under the action of the fixing spring 24. As the fixing head 111 continues to press down, it expands the first locking cavity 221 until the fixing head 111 completely passes through the first locking cavity 221, completing the initial fixation with the fixing spring 24. Then, the driving tool is inserted into the regular hexagonal groove 232 at the lower end of the locking drive shaft 23 through the operating hole 213. The driving tool drives the locking drive shaft 23 to rotate, and with the thread engagement, the locking drive shaft 23 moves upward along the through cavity 211 of the base 21 to the upper limit position. Figure 4As shown in the diagram, during the upward movement of the locking drive shaft 23, the fixing head 111 enters the second locking cavity 231, closely adhering to and pressing the tapered portion 223 of the elastic locking sleeve 22 against the inverted conical portion 233 of the second locking cavity 231, causing the inner diameter of the first locking cavity 221 to shrink to a size smaller than the outer diameter of the fixing head 111. Since the threaded connection locks the axial position of the locking drive shaft 23, and the inverted conical portion 233 locks the outward expansion position of the tapered portion 223, the inner diameter of the first locking cavity 221 is limited to its minimum limit. At this point, the fixing head 111 cannot retract into the first locking cavity 221, thus achieving the fixation of the fixing pin 11 to the base 21, and completing the replacement process of the new power battery.

[0054] In summary, vehicles using the aforementioned modular fast battery swapping device can quickly complete the replacement of the power battery. While ensuring the vehicle's range, it also ensures the reliability of the modular fast battery swapping device, making the connection between the power battery and the vehicle body more stable and reliable. Furthermore, it facilitates later maintenance and reduces vehicle operating costs.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular fast battery swapping device, characterized in that, It includes a body locking module and a battery locking module. The body locking module includes a fixing pin, and the outer diameter of the fixing pin increases along the axial direction to form a fixing head. The battery locking module includes a base, an elastic locking sleeve, and a locking drive shaft. The base has a through cavity, the elastic locking sleeve is installed on the upper part of the through cavity, and the locking drive shaft is slidably installed on the lower part of the through cavity. The elastic locking sleeve has a first locking cavity through which the fixing pin can pass, and a sleeve sidewall that can extend and retract to change the inner diameter of the first locking cavity under the action of external force. The locking drive shaft has a second locking cavity into which the fixing head can be inserted, and a locking structure for squeezing the sidewall of the jacket to retract; A limiting structure for locking the position of the locking drive shaft is provided between the locking drive shaft and the base; The limiting structure includes an internal thread provided on the inner wall of the cavity and an external thread provided on the outer wall of the locking drive shaft. The upper end of the first locking cavity is provided with an upper conical opening to facilitate the insertion of the fixing pin, and the lower end of the first locking cavity is provided with a lower conical opening.

2. The modular fast battery swapping device according to claim 1, characterized in that, The outer side of the elastic locking sleeve is provided with a tapered portion, and the locking structure is an inverted tapered portion provided at the upper end of the second locking cavity.

3. The modular fast battery swapping device according to claim 2, characterized in that, The upper opening of the cavity is provided with a limiting step, the upper outer end of the elastic locking sleeve is provided with an upper limit part for abutting against the limiting step, the lower outer end of the elastic locking sleeve is provided with a lower limit part, and the second locking cavity is provided with a fixed spring for abutting against the lower limit part and being in a compressed state.

4. The modular fast battery swapping device according to claim 3, characterized in that, The jacket sidewall is provided with multiple expansion grooves spaced apart along the axial direction.

5. The modular fast battery swapping device according to claim 3, characterized in that, The fixing pin has a frustum portion, and the upper opening of the cavity has a trapezoidal opening into which the frustum portion can be inserted and tightly fitted. The lower inner diameter of the trapezoidal opening narrows to form the limiting step.

6. The modular fast battery swapping device according to any one of claims 1-5, characterized in that, The lower end of the locking drive shaft is provided with a polygonal groove, and the lower end of the base is provided with an operating hole for exposing the polygonal groove.

7. The modular fast battery swapping device according to any one of claims 1-5, characterized in that, The vehicle body locking module also includes a vehicle body fixing block, and the fixing pin is installed and fixed to the vehicle body fixing block.

8. A vehicle, comprising a body and a power battery, characterized in that, It also includes a modular fast battery swapping device as described in any one of claims 1 to 7, wherein the body locking module of the modular fast battery swapping device is fixed to the body, and the battery locking module of the modular fast battery swapping device is fixed to the power battery.

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