Unlocking device and battery replacement device including the same

Abstract

The present invention provides an unlocking device and a battery replacement device including the same. The unlocking device includes an unlocking part, a driving part, a connecting part and a resetting part. The unlocking part is used to cooperate with a locking mechanism on an electric vehicle to unlock a battery pack; the driving part drives the unlocking part to move to an unlocking position through the connecting part; the resetting part is connected to the connecting part, and the resetting part is used to move the unlocking part from the unlocking position to the origin position when the driving part releases the driving of the unlocking part. The resetting part is also used to cover at least a part of the moving path of the unlocking part. The present invention changes the structure of the resetting part so that it can play the role of resetting and dustproof at the same time. Compared with separately setting the resetting structure and the dustproof structure, the space occupied is greatly reduced, and basically there is no need to change the other structural layouts of the unlocking device, thereby improving the feasibility of installing the dustproof structure on the moving path of the unlocking part.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicles, and in particular to an unlocking device and a battery replacement device comprising the unlocking device. Background Art

[0002] With the development of society and the advancement of science and technology, electric vehicles are becoming more and more popular among consumers. At present, electric vehicles mainly include direct charging type and quick-change type. The quick-change type requires the help of a battery swap station to achieve rapid replacement of battery packs. The battery swap equipment in the battery swap station takes out the battery pack from the electric vehicle and places it in the battery compartment for charging, or puts the battery pack in the battery compartment into the electric vehicle.

[0003] In order to ensure the stability and safety of the battery pack when it is installed in the electric vehicle, the battery pack is generally locked with the electric vehicle through a locking mechanism provided on the electric vehicle. When the battery pack is in a low-power state, the battery pack on the electric vehicle is generally unlocked by an unlocking device on the battery exchange device. The unlocking device in the prior art, such as the solution disclosed in the Chinese patent application with publication number CN111267597A and application number CN202010076944.2, slides on the guide rail to drive the unlocking rod on the slider to slide between the unlocking position and the origin position. In the above solution, since there is no protection measure above the guide rail, the guide rail is exposed to the external environment. The long-term use of the battery exchange device is prone to accumulation of dust and other debris on the unlocking device. In particular, for dust and other debris on the moving path of the unlocking part in the unlocking mechanism, if it is not cleaned in time, the movement of the unlocking part will be blocked, thereby causing the unlocking device to fail to operate normally. The overall structure of the area where the unlocking part is provided in the traditional unlocking device is compact, and it is impossible to install a dustproof structure on the moving path of the unlocking part. The dust can only be cleaned regularly, which is time-consuming. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the moving path of the unlocking part in the unlocking device is easily contaminated, resulting in the inability of the unlocking part to move normally, and to provide an unlocking device and a battery replacement device including the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] An unlocking device, the unlocking device is used to unlock a battery pack locked in an electric vehicle, the unlocking device comprises an unlocking part, a driving part, a connecting part and a resetting part;

[0007] The unlocking portion is used to cooperate with the locking mechanism on the electric vehicle to unlock the battery pack;

[0008] The driving part drives the unlocking part to move to the unlocking position through the connecting part;

[0009] The reset portion is connected to the connecting portion, and is used to move the unlocking portion from the unlocking position to the origin position when the driving portion releases the driving of the unlocking portion. The reset portion is also used to cover at least a portion of the moving path of the unlocking portion.

[0010] In this solution, the driving part drives the connecting part to move, and the connecting part drives the unlocking part connected thereto to move synchronously until the unlocking part moves to the unlocking position, thereby unlocking the locking mechanism on the electric vehicle. After the unlocking part completes the unlocking work, the driving part moves to the initial position, and the unlocking part moves under the action of the resetting part until the unlocking part moves to the origin position. In addition to resetting the unlocking part, the resetting part can also cover at least a part of the moving path of the unlocking part. For the moving path of the unlocking part covered by the resetting part, most of the dust and other debris fall on the resetting part, and the debris falling on the moving path of the unlocking part is greatly reduced, thereby avoiding the accumulation of debris on the moving path of the unlocking part, effectively reducing the number of times to clean up the debris, and reducing the labor cost. By changing the structure of the resetting part so that it can play the role of resetting and dustproof at the same time, compared with separately setting the resetting structure and the dustproof structure, the occupied space is greatly reduced, and basically there is no need to change the other structural layouts of the unlocking device, thereby improving the feasibility of installing the dustproof structure on the moving path of the unlocking part.

[0011] Preferably, the reset portion comprises at least one reset component; the reset component is arranged on one side of the unlocking portion along the moving direction of the unlocking portion, or the reset component is arranged on both sides of the unlocking portion along the moving direction of the unlocking portion.

[0012] In this solution, a positional relationship of a reset component relative to the unlocking part is provided, and the above arrangement is used to enable the reset component to cover at least a portion of the moving path of the unlocking part, thereby preventing the movement of the unlocking part from being blocked due to dust and other debris falling on the moving path of the unlocking part, thereby ensuring the reliability of the unlocking device. The technicians can set the number and position of the reset components according to factors such as the origin position and layout of the unlocking part.

[0013] Preferably, the reset portion includes a baffle and a retraction portion, the first end of the baffle is connected to the connecting portion, the second end of the baffle is connected to the retraction portion, the retraction portion has a accommodating space for accommodating the baffle, the retraction portion is used to apply a force to the baffle so that at least a portion of the baffle enters the accommodating space, and the baffle is arranged on the moving path of the unlocking portion.

[0014] In this solution, the baffle is used to cover the moving path of the unlocking part, and dust and other debris will fall on the top of the baffle, but will not fall directly into the moving path of the unlocking part. The retracting part is used to accommodate the baffle and realize the resetting of the baffle, so as to avoid the interference of the baffle with other parts of the unlocking device during the retraction process, and even affect the extension and retraction of the baffle, so as to cause the unlocking part to fail to move normally.

[0015] Preferably, the retracting portion includes an elastic member and a mounting bracket, the first end of the elastic member is connected to the baffle, the second end of the elastic member is connected to the mounting bracket, and the elastic member is used to apply a force to the baffle to move the baffle toward the accommodating space.

[0016] In this solution, the mounting bracket is used to fix the second end of the elastic member to prevent the second end of the elastic member from moving out of the retraction portion along with the retaining bar, thereby ensuring that the elastic member can stretch and retract normally and play a role in resetting the retaining bar.

[0017] Preferably, the elastic member is a winding member, a first end of the winding member is connected to the blocking bar, and a second end of the winding member is connected to the mounting bracket.

[0018] In this solution, the winding-type elastic member occupies less space, and the unlocking mechanism does not need to reserve a large amount of space to place the elastic member, thereby improving the feasibility of installing a dustproof structure on the moving path of the unlocking part.

[0019] Preferably, the retraction portion also includes a reel, the second end of the baffle is connected to the reel, the first end of the elastic member is connected to the reel, and the elastic member is used to drive the reel to rotate so that the baffle is wound around the reel and retracted into the accommodating space.

[0020] In this solution, the drum is connected between the elastic member and the baffle, the baffle is wound around the outside of the drum, the elastic member is contained inside the drum, and the baffle rotates along the axis of the drum. The drum is used to limit the position of the baffle in the accommodation space and the moving direction of the baffle in the accommodation space, to prevent the baffle from deviating in the accommodation space during the stretching and retraction process, and to ensure that the baffle can move normally.

[0021] Preferably, the retracting portion further comprises a fixed shaft, both ends of the fixed shaft are connected to the mounting bracket, the second end of the elastic member is connected to the fixed shaft, and the elastic member can rotate around the fixed shaft.

[0022] In this solution, a specific method for connecting the elastic member to the mounting bracket is provided. The elastic member is wound around the outside of the fixed shaft. The fixed shaft is used to fix the second end of the elastic member to prevent the elastic member from moving out of the retracting portion along with the retaining bar.

[0023] Preferably, the unlocking portion comprises a guide rail, a slider and an unlocking member, the slider can slide on the guide rail, the connecting portion is arranged on the slider, the unlocking member is arranged on the connecting portion, and the blocking bar covers the guide rail.

[0024] In this solution, a specific structure of an unlocking part is provided, in which a driving part drives a connecting part connected thereto to move, and the connecting part slides on the guide rail through the slider under the limit of the guide rail and the slider, and drives the unlocking member provided on the connecting part to move synchronously, so that the unlocking member can move between the origin position and the unlocking position. The structure of the guide rail and the slider makes the sliding of the unlocking part smoother, and reduces the friction and wear of the unlocking part when sliding.

[0025] Preferably, the width of the baffle is greater than or equal to the width of the guide rail.

[0026] In this solution, the above-mentioned setting enables the baffle bar to completely cover the guide rail in the width direction, increases the coverage area of ​​the baffle bar on the guide rail, prevents the unlocking part from being unable to slide normally due to the accumulation of dust and other debris on the guide rail, and ensures the reliability of the unlocking device.

[0027] A battery swapping device, comprising the unlocking device as described above.

[0028] In this solution, an application field of an unlocking device is provided, and the battery swapping equipment first cooperates with the locking mechanism on the electric vehicle through the unlocking device to unlock the battery pack, and then removes the battery pack from the electric vehicle.

[0029] The positive and progressive effect of the present invention is that the driving part drives the connecting part to move, and the connecting part drives the unlocking part connected thereto to move synchronously until the unlocking part moves to the unlocking position, thereby unlocking the locking mechanism on the electric vehicle. After the unlocking work of the unlocking part is completed, the driving part moves to the initial position, and the unlocking part moves under the action of the resetting part until the unlocking part moves to the origin position. In addition to resetting the unlocking part, the resetting part can also cover at least a part of the moving path of the unlocking part. For the moving path of the unlocking part covered by the resetting part, most of the dust and other debris fall on the resetting part, and the debris falling on the moving path of the unlocking part is greatly reduced, avoiding the accumulation of debris on the moving path of the unlocking part, effectively reducing the number of times to clean up the debris, and reducing the labor cost. By changing the structure of the resetting part so that it can play the role of resetting and dustproof at the same time, compared with setting the resetting structure and the dustproof structure separately, the occupied space is greatly reduced, and basically there is no need to change the other structural layouts of the unlocking device, thereby improving the feasibility of installing the dustproof structure on the moving path of the unlocking part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of a battery replacement device according to an embodiment of the present invention.

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of a battery swap platform according to an embodiment of the present invention.

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of an unlocking device according to an embodiment of the present invention.

[0033] Figure 4 FIG. 2 is another schematic diagram of the three-dimensional structure of an unlocking device according to an embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of the three-dimensional structure of an unlocking device according to an embodiment of the present invention, with the driving part hidden.

[0035] Figure 6 This is a schematic top view of the unlocking device according to one embodiment of the present invention, with the driving portion hidden.

[0036] Figure 7 The figure is a schematic diagram of the three-dimensional structure of an unlocking portion according to an embodiment of the present invention.

[0037] Figure 8 FIG. 4 is a schematic diagram of the three-dimensional structure of a resetting portion according to an embodiment of the present invention.

[0038] Fig. 9 This is a schematic diagram of the three-dimensional structure of the reset portion of an embodiment of the present invention without the mounting bracket.

[0039] Fig.10 This is a schematic cross-sectional structure diagram of a reset portion without the mounting bracket according to an embodiment of the present invention.

[0040] Fig.11 for Fig.10 Enlarged view of part A.

[0041] Fig.12 It is a schematic diagram of the three-dimensional structure of one locking mechanism adapted to the unlocking device according to an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] Battery swap platform 11

[0044] Battery replacement equipment frame 12

[0045] Unlocking device 2

[0046] Unlocking unit 21

[0047] Guide Rail 211

[0048] Slider 212

[0049] Unlocking piece 213

[0050] Driving unit 22

[0051] Transmission component 221

[0052] Drive motor 222

[0053] Connection part 23

[0054] Reset component 3

[0055] Bar 31

[0056] Barrel body 311

[0057] Bar side panel 312

[0058] Retraction portion 32

[0059] Accommodation space 321

[0060] Elastic parts 322

[0061] Mounting bracket 323

[0062] Reel 324

[0063] Fixed shaft 325

[0064] Locking mechanism 4

[0065] Lock link 41

[0066] Lock tongue 42

[0067] Lock base 43

[0068] Unlock Block 44 DETAILED DESCRIPTION

[0069] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0070] like Figure 1-2 As shown in 12, this embodiment provides a battery swapping device for replacing a battery pack on an electric vehicle, the battery swapping device includes a battery swapping platform 11, and an unlocking device 2 on the battery swapping platform 11 can unlock a battery pack locked in the electric vehicle. The battery swapping platform 11 is movable relative to the battery swapping device frame 12 to drive the unlocking device 2 to approach the locking mechanism 4 on the electric vehicle.

[0071] like Figure 3-4 As shown, the unlocking device 2 includes an unlocking portion 21, a driving portion 22, a connecting portion 23 and a resetting portion.

[0072] The unlocking part 21 is used to cooperate with the locking mechanism 4 on the electric vehicle to unlock the battery pack. Fig.12As shown, the locking mechanism 4 includes a lock link 41, a lock tongue 42, a lock base 43 and an unlocking block 44. The lock tongue 42 and the lock base 43 are correspondingly arranged. The lock tongue 42 is rotatably mounted on the lock base 43. The lock base 43 is provided with an opening 431 and a receiving cavity extending from the opening 431. The opening 431 is used for the lock shaft installed on the battery pack to enter the receiving cavity. The unlocking block 44 is arranged on the side of the lock link 41 facing the lock base 43. The unlocking block 44 is an arc-shaped protrusion formed outward from the lock link 41. The top of the unlocking block 904 is an inner arc groove recessed into the lock link 901. In the process of unlocking the battery pack by the unlocking device 2, the unlocking part cooperates with the unlocking block 44 to push the unlocking block 44 upward. The lock link 41 drives the lock tongue 42 to rotate under the action of the unlocking block 44, so that the lock tongue 42 can rotate relative to the lock base 43 to switch the locking mechanism 4 from the locked state to the unlocked state, thereby realizing the unlocking of the battery pack. Among them, Fig.12 The locking mechanism shown is only one of the locking mechanisms that can be compatible with the unlocking device of this embodiment. In other alternative implementations, locking mechanisms with other structures can also be used.

[0073] like Figure 7 As shown, the unlocking part 21 includes a guide rail 211, a slider 212 and an unlocking member 213. The guide rail 211 is fixed on the battery exchange platform 11. The slider 212 cooperates with the guide rail 211 and can slide on the guide rail 211. The unlocking member 213 is connected to the slider 212 and follows the slider 212 to slide synchronously on the guide rail 211 to achieve the switching of the unlocking member 213 between the origin position and the unlocking position. The origin position refers to the initial position before the unlocking member 213 moves relative to the guide rail 211, and the unlocking position refers to the position of the unlocking member 213 when the unlocking member 213 follows the slider 212 to move to the right below the locking mechanism 4 of the electric vehicle and the unlocking member 213 is aligned with the unlocking block 44 on the locking mechanism 4 of the electric vehicle. When the unlocking member 213 is in the unlocking position, the unlocking member 213 extends upward and engages with the unlocking block 44 to unlock the battery pack. The matching structure of the guide rail 211 and the slider 212 makes the unlocking part 21 slide more smoothly, reduces the friction and wear of the unlocking part 21 when sliding, and improves the sliding accuracy of the unlocking part 21. The unlocking member 213 in this embodiment is an unlocking rod, which extends in the up-down direction. The unlocking rod cooperates with the unlocking block 44 to realize the unlocking of the battery pack on the electric vehicle.

[0074] The connecting portion 23 is connected between the unlocking portion 21 and the driving portion 22, and the driving portion 22 drives the unlocking portion 21 to move to the unlocking position through the connecting portion 23. Figure 4As shown, the driving part 22 includes a transmission component 221 and a driving motor 222. The transmission component 221 is connected between the driving motor 222 and the connecting part 23. The driving motor 222 provides driving force for the transmission component 221, so that the transmission component 221 can perform transmission movement, thereby driving the connecting part 23 connected to the transmission component 221 to move in the horizontal direction, so that the unlocking part 21 connected to the connecting part 23 moves synchronously with the connecting part 23 until the unlocking part 21 moves to the unlocking position. The transmission component 22 in this embodiment is a transmission belt structure, and the movement of the connecting part 23 connected to the transmission belt is realized by the rotation of the transmission belt.

[0075] The connecting portion 23 is used to transmit the driving force from the driving portion 22 to the unlocking portion 21, so that the unlocking portion 21 can move to the unlocking position under the driving force of the driving portion 22. Figure 3-7 As shown, one end of the connecting portion 23 connected to the unlocking portion 21 is arranged between the slider 212 and the unlocking member 213, the connecting portion 23 is arranged on the slider 212, and the unlocking member 213 is arranged on the connecting portion 23, the connecting portion 23, the slider 212 and the unlocking member 213 remain relatively still, and the three move in the horizontal direction synchronously. The connecting portion 23 in this embodiment is a plate-like structure, the first end of the connecting portion 23 is connected to the transmission component 221 of the driving portion 22, and the second end of the connecting portion 23 is connected to the unlocking portion 21, and the driving portion 22 drives the movement of the connecting portion 23 to drive the unlocking portion 21 connected to the connecting portion 23 to move, until the unlocking portion 21 is driven to move to the unlocking position.

[0076] The reset part is used to move the unlocking part 21 from the unlocking position to the origin position when the driving part 22 no longer applies driving force to the unlocking part 21, and to cover at least a part of the moving path of the unlocking part 21, so as to reduce the accumulation of debris on the moving path of the unlocking part 21. Figure 3-6 As shown, the reset part includes two reset components 3 respectively arranged on both sides of the unlocking part 21 along the moving direction of the unlocking part 21, one end of the reset component 3 is fixed on the battery exchange platform 11 and remains relatively still relative to the battery exchange platform 11, and the other end of the reset component 3 is fixed on the end where the connecting part 23 and the unlocking part 21 are connected and remains still relative to the end where the connecting part 23 and the unlocking part 21 are connected. The reset component 3 can apply a force to the connecting part 23 so that the connecting part 23 can drive the unlocking part 21 to reset from the unlocking position to the origin position. In this embodiment, the force applied by the reset component 3 to the unlocking part 21 is less than the driving force applied by the driving part 22 to the unlocking part 21. After the unlocking work of the unlocking device 2 is completed, the driving part 22 needs to release the driving force on the unlocking part 21 first, and the reset part can achieve the reset of the unlocking part 21.

[0077] Part of the structure of the reset component 3 in this embodiment is arranged above the guide rail 211. Since the unlocking part 21 slides on the guide rail 211, the extension direction of the guide rail 211 is the moving path direction of the unlocking part 21. The reset component 3 arranged above the guide rail 211 can cover the guide rail 211, that is, cover the moving path of the unlocking part 21, so that most of the dust and other debris falls on the reset component 3, and the debris falling on this part of the guide rail 211 is greatly reduced, thereby avoiding the accumulation of debris on the moving path of the unlocking part 21, effectively reducing the number of times of cleaning up debris and reducing labor costs.

[0078] Specifically, the two reset components 3 in this embodiment have the same structure, and both include a stop bar 31 and a retracting portion 32. The stop bar 31 is used to cover the moving path of the unlocking portion 21, and the retracting portion 32 is used to drive the unlocking portion 21 to move to the origin position. Figure 8-11 As shown, a first end of the baffle 31 is connected to the connecting portion 23, and a second end of the baffle 31 is connected to the retracting portion 32. The baffle 31 extends along the moving direction of the unlocking portion 21 and can be retracted and retracted in the moving direction of the unlocking portion 21. The baffle 31 covers the top of the guide rail 211 to shield the guide rail 211 and prevent dust from falling on the guide rail 211. Dust and other debris will fall on the top of the baffle 31 instead of directly falling on the guide rail 211, i.e., the moving path of the unlocking portion 21, thereby reducing the accumulation of debris on the moving path of the unlocking portion 21, effectively reducing the number of times of cleaning debris, and reducing labor costs.

[0079] Preferably, the width of the baffle 31 is slightly larger than the width of the guide rail 211, so that the baffle 31 can completely cover the top of the guide rail 211 in the width direction, increase the coverage area of ​​the baffle 31 on the guide rail 211, prevent dust and other debris from accumulating on the guide rail 211 and cause the unlocking portion 21 to be unable to slide normally, and ensure the reliability of the unlocking device 2. The width direction of the baffle 31 referred to in this embodiment is parallel to the width direction of the guide rail 211, and is perpendicular to the extension direction of the guide rail 211. For details, see Figure 6 The arrow in the figure indicates the direction.

[0080] Furthermore, the baffle bar 31 includes a baffle bar body 311 and two baffle bar side plates 312. The two baffle bar side plates 312 are respectively arranged on both sides of the baffle bar body 311 along the width direction of the baffle bar 31. The baffle bar body 311 is used to prevent debris from falling into the guide rail 211 from above the guide rail 211, and the baffle bar side plates 312 are used to prevent debris from falling into the guide rail 211 from the side of the guide rail 211, further strengthening the dust-proof effect of the baffle bar 31 on the guide rail 211.

[0081] In other alternative embodiments, the width of the baffle 31 may also be less than or equal to the width of the guide rail 211. When the width of the baffle 31 is equal to the width of the guide rail 211, preferably, the baffle 31 only includes the baffle body 311 to avoid friction between the baffle side plate 312 and the side of the guide rail 211, thereby reducing the service life of the guide rail 211.

[0082] The retracted portion 32 has an accommodating space 321 for accommodating the stop bar 31. The retracted portion 32 is used to apply a force to the stop bar 31 so that at least a portion of the stop bar 31 enters the accommodating space 321, thereby ensuring that the stop bar 31 outside the accommodating space 321 is always in a tensioned state and is not likely to interfere with other structures of the unlocking device 2, thereby ensuring the normal movement of the unlocking portion 21. Preferably, the accommodating space 321 only accommodates the stop bar body 311, and does not accommodate the stop bar side plate 312. The length of the stop bar side plate 312 is preferably less than the length of the stop bar body 311, that is, it only covers part of the side surface of the guide rail 211.

[0083] In this embodiment, the length of the bar body 311 on both sides of the connection portion is slightly greater than the length of the guide rails on both sides of the connection portion, so as to provide a certain retraction space for the bar body 311 to prevent the bar side plate 312 from being rolled into the retraction portion and getting stuck.

[0084] like Figure 8-11 As shown, the retracting portion 32 includes an elastic member 322, a mounting bracket 323, a reel 324 and a fixed shaft 325. Both ends of the fixed shaft 325 are movably connected to the mounting bracket 323, and the fixed shaft 325 can rotate relative to the mounting bracket 323. The elastic member 322 is arranged outside the fixed shaft 325, and the second end of the elastic member 322 is connected to the fixed shaft 325, and the elastic member 322 can rotate around the fixed shaft 325. The fixed shaft 325 is used to fix the second end of the elastic member 322 to prevent the elastic member 322 from moving out of the retracting portion 32 along with the blocking bar 31. The reel 324 is arranged outside the elastic member 322, and the first end of the elastic member 322 is connected to the reel 324. The elastic member 322 applies a force to the reel 324 to drive the reel 324 to rotate, and the elastic member 322, the reel 324 and the fixed shaft 325 rotate synchronously. The elastic member 322 may be a spring, a coil spring, or the like.

[0085] The elastic members 322 on both sides of the unlocking member 213 apply elastic forces in opposite directions to the unlocking member 213, and the elastic forces applied by the two to the unlocking member 213 are different, and except when the unlocking member 213 is at the origin position, the elastic force of the elastic member 322 closer to the origin position is always greater than the elastic force of the elastic member 322 closer to the unlocking position, and the vector sum of the elastic forces applied by the elastic members 322 on both sides of the unlocking member 213 to the unlocking member 213 is greater than the friction force of the slider relative to the slide rail, so as to ensure that the unlocking member 213 is pulled back from the unlocking position to the origin position after the driving force is released.

[0086] The reel 324 is indirectly connected to the mounting bracket 323, and the gap between the reel 324 and the mounting bracket 323 forms an accommodating space 321 for accommodating the blocking bar 31. The second end of the blocking bar 31 is arranged outside the reel 324 and connected to the reel 324. The reel 324 drives the blocking bar 31 to retract around the reel 324 and enter the accommodating space 321 under the action of the elastic member 322. The reel 324 can limit the position of the blocking bar 31 in the accommodating space 321 and the moving direction of the blocking bar 31 in the accommodating space 321, prevent the blocking bar 31 from deflecting in the accommodating space 321 during the stretching and retraction process, and ensure that the blocking bar 31 can move normally.

[0087] Preferably, the elastic member 322 in this embodiment is a winding member, the first end of the winding member is connected to the reel 324, and the second end of the winding member is connected to the fixed shaft 325. The winding member type elastic member 322 occupies less space, and the unlocking mechanism does not need to reserve a large amount of space to place the elastic member 322, thereby improving the feasibility of installing a dustproof structure on the moving path of the unlocking part 21. The winding member described in this embodiment is a coil spring structure.

[0088] In other alternative embodiments, the number of reset components 3 may be one or more than three. In this embodiment, a reset component 3 is provided on each side of the unlocking portion 21 along its moving direction so that the blocking bar 31 in the reset component 3 can cover the guide rails 211 on both sides of the unlocking portion 21, so that the guide rails 211 on both sides of the unlocking portion 21 are not easy to accumulate dust and other debris. If the reset portion includes only one reset component 3, the reset component 3 can be provided on one side of the unlocking portion 21 along the moving direction of the unlocking portion 21, which can also play a role in shielding part of the moving path of the unlocking portion 21. Those skilled in the art can set the number and position of the reset components 3 according to factors such as the origin position and layout of the unlocking portion 21.

[0089] This embodiment changes the structure of the reset part so that it can perform the reset and dust-proof functions at the same time. Compared with separately setting the reset structure and the dust-proof structure, the occupied space is greatly reduced, and there is basically no need to change the other structural layouts of the unlocking device 2, thereby improving the feasibility of installing the dust-proof structure on the moving path of the unlocking part 21.

[0090] The working principle of the unlocking device 2 is briefly described below:

[0091] After the battery exchange platform 11 moves to the predetermined position for battery exchange, when the unlocking device 2 needs to unlock the battery pack on the electric vehicle, the driving motor 222 of the driving part 22 drives the transmission component 221 to rotate, and the transmission component 221 then drives the connecting part 23 connected thereto to move along the guide rail 211. The movement of the connecting part 23 simultaneously drives the slider 212 and the unlocking member 213 of the unlocking part 21 to slide on the guide rail 211 until the unlocking member 213 is driven to move from the origin position to the unlocking position. In this process, among the baffle bars 31 in the two reset assemblies 3 on both sides of the unlocking part 21, the baffle bar 31 close to the origin position overcomes the elastic force of the elastic member and is elongated (pulled out of the accommodating space 321 of the reset assembly 3), and the baffle bar 31 close to the unlocking position is shortened (retracted into the accommodating space 321 of the reset assembly 3) under the elastic force of the elastic member. The reset assembly 3 close to the origin position is defined as the first reset assembly, and the reset assembly 3 close to the unlocking position is defined as the second reset assembly. The area of ​​the guide rail 211 blocked by the blocking bar 31 in the first reset assembly is larger than the area of ​​the guide rail 211 blocked by the blocking bar 31 in the second reset assembly. At this time, the blocking bar 31 in the second reset assembly accommodated in the accommodating space 321 is larger than the blocking bar 31 in the first reset assembly accommodated in the accommodating space 321. In this process, along the moving direction of the unlocking portion 21, the first reset assembly applies a force to the unlocking portion 21 toward the first reset assembly, the second reset assembly applies a force to the unlocking portion 21 toward the second reset assembly, and the driving portion 22 applies a force to the unlocking portion 21 toward the second reset assembly. The vector sum of the forces of the elastic members 322 in the two reset assemblies 3 on the unlocking portion 21 is smaller than the driving force of the driving portion 22 on the unlocking portion 21, so that the driving portion 22 can drive the unlocking portion 21 to move to the unlocking position.

[0092] After reaching the unlocking position, the battery exchange platform 11 drives the unlocking device 2 to rise, and the unlocking member 213 cooperates with the unlocking block 44 of the locking mechanism 4 of the electric vehicle. The unlocking member 213 cooperates with the unlocking block 44 to unlock the locking mechanism 4, thereby unlocking the battery pack on the electric vehicle. During this process, the driving part 22 always maintains the driving force applied to the unlocking part 21 to prevent the position of the unlocking member 213 from being offset and failing to unlock normally.

[0093] After unlocking is completed, the battery exchange platform 11 drives the unlocking device 2 to descend, and the driving part 22 releases the drive to the unlocking part 21. At this time, the unlocking part 21 is subjected to opposite forces applied by the first reset component and the second reset component in its moving direction. At this time, the force applied by the first reset component to the unlocking part 21 is greater than the force applied by the second reset component to the unlocking part 21, and the unlocking part 21 moves to one side of the first reset component until the forces applied by the two reset components 3 to the unlocking part 21 are balanced, and the unlocking part 21 moves from the unlocking position to the origin position.

[0094] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship when the device or element is normally used, and 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, be constructed and operate in a specific orientation at all times, unless otherwise specified herein.

[0095] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An unlocking device, used to unlock a battery pack locked in an electric vehicle, characterized in that: The unlocking device comprises an unlocking part, a driving part, a connecting part and a resetting part; The unlocking portion is used to cooperate with the locking mechanism on the electric vehicle to unlock the battery pack; The driving part drives the unlocking part to move to the unlocking position through the connecting part; The reset portion is connected to the connecting portion, and is used to move the unlocking portion from the unlocking position to the origin position when the driving portion releases the driving of the unlocking portion, and the reset portion is also used to cover at least a part of the moving path of the unlocking portion; The reset portion includes at least one reset component; The reset component is arranged on one side of the unlocking portion along the moving direction of the unlocking portion, or the reset component is arranged on both sides of the unlocking portion along the moving direction of the unlocking portion; The reset portion includes a stop bar and a retracting portion, wherein a first end of the stop bar is connected to the connecting portion, a second end of the stop bar is connected to the retracting portion, the retracting portion has an accommodating space for accommodating the stop bar, the retracting portion is used to apply a force to the stop bar so that at least a portion of the stop bar enters the accommodating space, and the stop bar is arranged on a moving path of the unlocking portion; The retracting portion includes an elastic member and a mounting bracket, wherein a first end of the elastic member is connected to the baffle, and a second end of the elastic member is connected to the mounting bracket, and the elastic member is used to apply a force to the baffle to move the baffle toward the accommodating space.

2. The unlocking device according to claim 1, characterized in that: The elastic member is a winding member, a first end of the winding member is connected to the blocking bar, and a second end of the winding member is connected to the mounting bracket.

3. The unlocking device according to claim 1, characterized in that: The retraction portion also includes a reel, the second end of the baffle is connected to the reel, the first end of the elastic member is connected to the reel, and the elastic member is used to drive the reel to rotate so that the baffle is wound around the reel and retracted into the accommodating space.

4. The unlocking device according to claim 1, characterized in that: The retracting portion further comprises a fixed shaft, both ends of which are connected to the mounting bracket, the second end of the elastic member is connected to the fixed shaft, and the elastic member can rotate around the fixed shaft.

5. The unlocking device according to claim 1, characterized in that: The unlocking part comprises a guide rail, a slider and an unlocking member, the slider can slide on the guide rail, the connecting part is arranged on the slider, the unlocking member is arranged on the connecting part, and the blocking bar covers the guide rail.

6. The unlocking device according to claim 5, characterized in that: The width of the blocking bar is greater than or equal to the width of the guide rail.

7. A battery replacement device, characterized in that: The battery replacement device includes an unlocking device as described in any one of claims 1-6.

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