Unlocking linkage device, battery pack assembly and electric vehicle

Abstract

This invention discloses an unlocking linkage device, a battery pack assembly, and an electric vehicle. The unlocking linkage device includes an unlocking component and a mounting component. The unlocking component is mounted to the battery pack via the mounting component. The unlocking component includes a first unlocking rod and a second unlocking rod. The first unlocking rod is elastically connected to the mounting component via a first elastic portion, and the second unlocking rod is elastically connected to the first unlocking rod via a second elastic portion. The second elastic portion and the first elastic portion are spaced apart. The top end of the first unlocking rod can extend from an outlet of the battery pack and unlock the locking mechanism on the electric vehicle. This invention offers high alignment accuracy, improving unlocking efficiency. It avoids hard impacts on the locking mechanism, thus contributing to the durability of both the unlocking linkage device and the locking mechanism. Furthermore, the unlocking linkage device is located on the battery pack, making replacement convenient.

Description

[0001] This application claims priority to Chinese patent application CN2021116067637, filed on December 26, 2021, and Chinese patent application CN2021116067815, filed on December 26, 2021. The full text of the aforementioned Chinese patent applications is incorporated herein by reference. Technical Field

[0002] This invention relates to an unlocking linkage device, a battery pack assembly, and an electric vehicle. Background Technology

[0003] The battery installation methods for existing electric vehicles are generally divided into fixed installation and swappable installation. Fixed installation batteries are generally fixed to the vehicle; while swappable installation batteries are generally installed in a movable manner, and the battery can be removed at any time for replacement or charging. After replacement or charging is completed, it is then installed back onto the vehicle body.

[0004] For swappable batteries, in existing technologies, the unlocking mechanism on the battery swapping device needs to pass through the battery pack to unlock the locking mechanism on the electric vehicle. This results in poor alignment accuracy and low unlocking efficiency. Furthermore, the movement of the unlocking mechanism during the unlocking process impacts the locking mechanism, which can easily lead to accelerated wear on both the locking and unlocking mechanisms after use, and in severe cases, even cause the locking mechanism to fail. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to securely lock the battery to the vehicle while improving the alignment accuracy of the unlocking mechanism and the locking mechanism, and reducing the wear of the locking mechanism and the unlocking mechanism, thereby providing an unlocking linkage device, a battery pack assembly and an electric vehicle.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] An unlocking linkage device is disclosed for unlocking a locking mechanism on an electric vehicle. The unlocking linkage device includes an unlocking component and a mounting component. The unlocking component is mounted on a battery pack via the mounting component. The unlocking component includes a first unlocking rod and a second unlocking rod. The first unlocking rod is elastically connected to the mounting component via a first elastic portion. The second unlocking rod is elastically connected to the first unlocking rod via a second elastic portion. The second elastic portion and the first elastic portion are spaced apart. The top end of the first unlocking rod can extend from an outlet of the battery pack and unlock the locking mechanism on the electric vehicle.

[0008] In this technical solution, the unlocking linkage device is installed on the battery pack. The unlocking mechanism directly acts on the unlocking linkage device to unlock the battery pack and the locking mechanism on the electric vehicle. This provides high alignment accuracy and improves unlocking efficiency. During unlocking, when a load is applied to the second unlocking rod by the unlocking mechanism, the second unlocking rod pushes the first unlocking rod out of the outlet and acts on the locking mechanism of the electric vehicle to unlock it. Since the second unlocking rod is elastically connected to the first unlocking rod through a second elastic part, the second elastic part can act as an energy storage component to store force. This facilitates the first unlocking rod opening the locking linkage when the second elastic part is compressed. Furthermore, the impact force between the first and second unlocking rods is buffered by the second elastic part, avoiding a hard impact on the locking mechanism, thus contributing to the durability of the unlocking linkage device and the locking mechanism. The first elastic part applies a downward force to the first unlocking rod after unlocking to reset the first unlocking rod relative to the battery pack. When the second unlocking rod pushes the first unlocking rod to unlock the locking mechanism, the elastic force of the first elastic part can also buffer the collision force between the first unlocking rod and the locking mechanism.

[0009] Preferably, the first unlocking rod includes a first limiting portion, the first elastic portion is sleeved on the first unlocking rod, and the two ends of the first elastic portion abut against the mounting member and the first limiting portion, respectively.

[0010] In this technical solution, the first limiting part and the mounting part together restrict the position of the first elastic part, preventing the first elastic part from dislodging. The first elastic part applies a downward force to the first unlocking rod, causing the first unlocking rod to return to its original position relative to the mounting part. Simultaneously, the first limiting part and the mounting part on the first unlocking rod are fully utilized for limiting, simplifying the limiting structure.

[0011] Preferably, in the initial state, the first elastic part is pre-compressed.

[0012] In this technical solution, the pre-compressed first elastic part generates pre-pressure on the first unlocking rod, which can increase the reaction force and avoid the impact of electric vehicle vibration on the unlocking component.

[0013] Preferably, one of the first unlocking lever and the second unlocking lever has a guide hole and the other has a guide post, the guide hole and the guide post being slidably connected.

[0014] In this technical solution, the sliding direction of the first unlocking rod and the second unlocking rod can be guided by the guide post and the guide hole, thereby ensuring that the movement direction of the first unlocking rod and the second unlocking rod is on the same straight line, and avoiding misalignment of the first unlocking rod and the second unlocking rod during relative movement.

[0015] Preferably, the second unlocking rod includes a guide hole, the first unlocking rod is inserted into the guide hole, and the second elastic part is sleeved on the first unlocking rod and abuts against the second unlocking rod, or the second elastic part is disposed in the guide hole.

[0016] In this technical solution, the guide hole serves to engage with the first unlocking rod and also limits the movement of the second elastic part, thus making full use of the guide hole's structure and simplifying the overall design. The first elastic part is fitted onto the first unlocking rod or disposed within the guide hole. When the second unlocking rod pushes the first unlocking rod, the first elastic part acts on the first unlocking rod, buffering the pushing force of the second unlocking rod on the first unlocking rod, and consequently buffering the impact force of the first unlocking rod on the locking mechanism.

[0017] Preferably, the first unlocking lever includes a second limiting portion, and the two ends of the second elastic portion abut against the second limiting portion and the second unlocking lever, respectively.

[0018] In this technical solution, the second elastic part can be limited by the second limiting part to prevent it from detaching from the first unlocking rod, and always keep in contact with the first unlocking rod and exert its effect.

[0019] Preferably, the mounting component includes a mounting base, the second unlocking rod passes through the mounting base, and the second unlocking rod is provided with a limiting portion to abut against the mounting base.

[0020] In this technical solution, the mounting base is used to position and limit the second unlocking rod, preventing the second unlocking rod from separating from the mounting base and ensuring the integrity of the mounting base and the second unlocking rod.

[0021] Preferably, the mounting component further includes a mounting bracket mounted on the mounting base, the first unlocking rod passing through the mounting bracket, and the first unlocking rod including a third limiting portion, wherein in the initial state, the third limiting portion partially limits the first unlocking rod above the mounting bracket.

[0022] In this technical solution, the mounting bracket is used to position and limit the first unlocking lever, ensuring the integrity of the mounting base and the first unlocking lever. Simultaneously, it ensures that the first unlocking lever does not fall from above the mounting bracket in its initial state.

[0023] Preferably, the mounting bracket includes a pair of side guard plates and a limiting plate, the limiting plate being disposed at the top of the two side guard plates and connecting the two side guard plates, and the first unlocking rod passing through the limiting plate.

[0024] In this technical solution, the side guard plate can protect both sides of the first unlocking rod and support the limiting plate, thereby increasing the support strength of the limiting plate and the side guard plate. The limiting plate can also limit the first elastic part to prevent it from coming out.

[0025] Preferably, the mounting bracket further includes a guide plate for guiding the first unlocking lever, the guide plate being located between the first elastic portion and the second elastic portion.

[0026] In this technical solution, the guide plate can improve the support strength of the lateral protective plate. The guide plate can also limit and guide the first unlocking rod, preventing deviation during its movement. The guide plate isolates the first elastic part and the second elastic part, preventing mutual interference between them.

[0027] Preferably, the first unlocking rod includes a first segment, a second segment, and a third segment connected in sequence, with the outer diameters of the first segment, the second segment, and the third segment decreasing sequentially. The first limiting portion is disposed on the second segment. In the initial state, the first segment is located above the mounting bracket, the first elastic portion is sleeved on the second segment, and the two ends of the first elastic portion abut against the mounting bracket and the first limiting portion, respectively. The second elastic portion is sleeved on the third segment, and the two ends of the second elastic portion abut against the second segment and the second unlocking rod, respectively. The third segment is inserted into the second unlocking rod.

[0028] In this technical solution, the first elastic part and the second elastic part are fixed and limited by the first segment, the second segment and the third segment. The first unlocking rod can be directly processed, reducing the internal limiting structure and simplifying the overall structure.

[0029] Preferably, the first segment includes a transition segment connected to the second segment, the transition segment having an inclined outer peripheral surface.

[0030] In this technical solution, the inclined outer peripheral surface is easy to process, can better limit the movement of other structures, and can accommodate different processing errors.

[0031] Preferably, the unlocking linkage device further includes a guide cylinder, which is installed on the end of the mounting member facing the outlet for positioning with the outlet. The guide cylinder is sleeved on the first unlocking rod, and the first unlocking rod moves along the guide cylinder.

[0032] In this technical solution, the guide cylinder can be installed and positioned with the outlet on the battery pack, and the first unlocking rod can be guided by the guide cylinder as it moves from the outlet to the outlet, thus preventing the first unlocking rod from deviating from its direction of movement and colliding with the outlet, thereby protecting the first unlocking rod and the outlet.

[0033] Preferably, the guide cylinder has a first mating portion at the end away from the mounting member, the outer peripheral shape of the first mating portion being adapted to the shape of the outlet, the first mating portion extending into one side of the outlet and at least partially extending out from the other side of the outlet.

[0034] In this technical solution, the first mating part is installed in conjunction with the outlet of the battery pack, and the first mating part ensures, at least through its own extended shape, that the movement of the first unlocking rod on both sides of the outlet is always guided by the guide tube.

[0035] Preferably, an inclined guide surface is formed between the end face and the outer peripheral surface of the first mating part.

[0036] In this technical solution, the inclined guide surface guides the first mating part during insertion into the outlet, which facilitates the insertion of the first mating part into the outlet.

[0037] Preferably, the guide cylinder includes a guide cylinder body, the first mating part is located at one end of the guide cylinder body, and the outer peripheral dimension of the guide cylinder body is larger than the dimension of the outlet.

[0038] In this technical solution, the larger guide cylinder body prevents the guide cylinder body from detaching from the outlet, ensuring that the guide cylinder body does not leave the battery pack.

[0039] Preferably, the other end of the guide cylinder body is provided with a second mating part, which is inserted into the opening at the top of the mounting component, and the outer circumferential dimension of the second mating part is smaller than that of the guide cylinder body.

[0040] In this technical solution, the larger guide cylinder body prevents the entire guide cylinder body from entering the mounting component, thus serving as a limiting function.

[0041] Preferably, the first mating part has a first opening, the second mating part has a second opening, the first opening and the second opening are connected, and the first unlocking rod passes through the first opening and the second opening into the guide cylinder.

[0042] In this technical solution, the first unlocking rod moves through the first and second openings and is completely separated from the outlet by the guide cylinder, thus avoiding contact and collision with the outlet.

[0043] Preferably, the second opening is smaller than the first opening.

[0044] In this technical solution, the smaller second opening can limit the first unlocking rod, preventing the first unlocking rod from sliding down from inside the guide cylinder to below the guide cylinder.

[0045] Preferably, the guide cylinder has a guide space inside, the shape of which is adapted to the first unlocking rod, at least a portion of which is located within the guide space and moves along the guide space.

[0046] In this technical solution, the movement of the first unlocking lever can be better guided by the guide space, ensuring the smooth movement of the first unlocking lever.

[0047] Preferably, the guide space includes a first guide space and a second guide space. The first guide space has a limiting surface connected to the second guide space. In the initial state, a portion of the first unlocking rod is limited within the first guide space by the limiting surface.

[0048] In this technical solution, the limiting surface can ensure that at least a portion of the first unlocking rod always slides within the first guide space.

[0049] Preferably, the top end of the first unlocking lever is rounded; or the top end of the first unlocking lever is provided with a rolling element.

[0050] In this technical solution, the smooth tip and rolling element can improve the smoothness of movement when the first unlocking rod cooperates with the locking mechanism, and reduce the wear of the first unlocking rod and the locking mechanism.

[0051] Preferably, the rolling element is directly mounted on the end of the first unlocking lever or fixed to the end of the first unlocking lever via a mounting portion. The rolling element is confined to the end of the first unlocking lever or the mounting portion and rolls relative to the end of the first unlocking lever or the mounting portion.

[0052] In this technical solution, the rolling element can be easily disassembled and replaced through the mounting part.

[0053] Preferably, the bottom of the unlocking component is provided with an input end plate, and the extending direction of the input end plate is consistent with the extending direction of the unlocking surface on the locking mechanism.

[0054] In this technical solution, the structure of the input end plate allows the unlocking mechanism to always be in contact with the input end plate at different positions along the unlocking direction during the unlocking process.

[0055] A battery pack assembly includes a battery pack and an unlocking linkage device as described above, the unlocking linkage device being inserted through the battery pack in a vertical direction.

[0056] An electric vehicle includes a locking mechanism and a battery pack assembly. The locking mechanism is disposed on the electric vehicle and is used to lock in conjunction with a locking element on the battery pack. An unlocking linkage device is used to unlock the locking mechanism and the locking element.

[0057] Preferably, the locking mechanism includes a locking link and a plurality of locking bases. The locking link is movably connected to the locking bases. The bottom of the locking link has an unlocking surface extending along the length of the locking link. Under the action of an external force, the first unlocking rod abuts against the unlocking surface and lifts the locking link and remains in the lifted state. During the lifting process, the top end of the first unlocking rod slides horizontally along the unlocking surface.

[0058] In this technical solution, the unlocking surface extending along the length of the locking rod allows the first unlocking rod to abut against the locking rod during its movement relative to the locking rod, thereby improving the stability of unlocking.

[0059] Preferably, a buffer structure is provided at the unlocking surface, and the first unlocking rod acts on the buffer structure.

[0060] In the technical solution, the buffer structure is set at the unlocking surface. The first unlocking rod will directly exert force on the buffer structure. The buffer structure reduces the impact of the first unlocking rod on the locking link, extends the service life of the locking link, and reduces the wear caused by the collision and friction between the first unlocking rod and the locking link.

[0061] The positive and progressive effects of this invention are as follows:

[0062] This invention's unlocking linkage device boasts high alignment accuracy, improving unlocking efficiency. During unlocking, the second elastic portion acts as an energy storage component, accumulating force to facilitate the first unlocking rod's push against the locking linkage while the second elastic portion is compressed. Furthermore, the impact force between the first and second unlocking rods is buffered by the second elastic portion, preventing a hard impact on the locking mechanism, thus contributing to the durability of both the unlocking linkage device and the locking mechanism. The first elastic portion applies a downward force to the first unlocking rod after unlocking, causing it to return to its original position relative to the battery pack. When the second unlocking rod pushes the first unlocking rod to unlock the locking mechanism, the elastic force of the first elastic portion also buffers the collision force between the first unlocking rod and the locking mechanism. Moreover, the unlocking linkage device is located on the battery pack, making replacement convenient. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of an electric vehicle according to a preferred embodiment of the present invention.

[0064] Figure 2 This is a schematic diagram of the battery pack assembly, quick-change bracket, and locking mechanism according to a preferred embodiment of the present invention.

[0065] Figure 3 This is a three-dimensional structural diagram of a battery pack assembly according to a preferred embodiment of the present invention.

[0066] Figure 4 This is a partially enlarged structural diagram of the battery pack assembly according to a preferred embodiment of the present invention.

[0067] Figure 5 This is a partial cross-sectional schematic diagram of a battery pack assembly according to a preferred embodiment of the present invention.

[0068] Figure 6 This is a three-dimensional structural diagram of the unlocking linkage device according to a preferred embodiment of the present invention.

[0069] Figure 7 This is an exploded view of the unlocking linkage device according to a preferred embodiment of the present invention.

[0070] Figure 8 This is a cross-sectional schematic diagram of the unlocking linkage device according to a preferred embodiment of the present invention.

[0071] Figure 9 This is a cross-sectional schematic diagram of the guide cylinder according to a preferred embodiment of the present invention.

[0072] Figure 10 This is a three-dimensional structural diagram of the top of the first unlocking rod according to a preferred embodiment of the present invention.

[0073] Figure 11 This is a partial cross-sectional schematic diagram of a battery pack assembly according to another embodiment of the present invention.

[0074] Figure 12 This is a schematic diagram of the top structure of the first unlocking rod according to another embodiment of the present invention.

[0075] Figure 13 This is a schematic diagram of the locking and unlocking states of the locking mechanism according to a preferred embodiment of the present invention.

[0076] Figure 14 This is a schematic diagram of the unlocking process of the locking mechanism according to a preferred embodiment of the present invention. Detailed Implementation

[0077] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0078] like Figures 1-13 As shown, this embodiment discloses an electric vehicle, including commercial vehicles such as heavy-duty trucks and light-duty trucks. The electric vehicle includes a locking mechanism, which is mounted on the main beam of the electric vehicle via a quick-change bracket, or the locking mechanism is directly mounted on the main beam of the electric vehicle. Wherein, as... Figures 1-4As shown, this embodiment of an electric vehicle may include a quick-change bracket 500, a locking mechanism 300, and a battery pack assembly. The battery pack assembly may include a battery pack 400 and an unlocking linkage device 100, which extends from bottom to top through the battery pack 400. The locking mechanism 300 is mounted on the quick-change bracket 500 and engages with a locking element 210 on the battery pack 400 to lock it in place. The unlocking linkage device 100 unlocks the locking mechanism 300 and the locking element 210. In this embodiment, the locking element 210 is a locking shaft.

[0079] like Figures 2-10 As shown, this embodiment discloses an unlocking linkage device 100 for unlocking a locking mechanism 300 on an electric vehicle. The unlocking linkage device 100 includes an unlocking component and a mounting component 140. The unlocking component is mounted on a battery pack 400 via the mounting component 140. The unlocking component includes a first unlocking rod 110 and a second unlocking rod 120. The first unlocking rod 110 is elastically connected to the mounting component 140 via a first elastic portion 131, and the second unlocking rod 120 is elastically connected to the first unlocking rod 110 via a second elastic portion 132. The second elastic portion 132 and the first elastic portion 131 are spaced apart. The top end of the first unlocking rod 110 can extend from an outlet 220 of the battery pack 400 to unlock the locking mechanism 300 on the electric vehicle. In the initial state, the top end of the first unlocking rod 110 extends out of the outlet 220 of the battery pack 400, thereby shortening the distance between the first unlocking rod 110 and the locking mechanism 300, reducing the unlocking stroke, improving unlocking efficiency, and also improving unlocking reliability.

[0080] In this embodiment, the unlocking linkage device 100 is mounted on the battery pack 400. The unlocking mechanism of the external unlocking device directly acts on the unlocking linkage device 100 to unlock the battery pack 400 from the locking mechanism 300 on the electric vehicle. This provides high alignment accuracy and improves unlocking efficiency. During unlocking, when the external unlocking device's unlocking mechanism applies a load to the second unlocking rod 120, the second unlocking rod 120 pushes the first unlocking rod 110 out of the outlet 220, thereby acting on the locking mechanism 300 of the electric vehicle and unlocking it. Since the second unlocking rod 120 is elastically connected to the first unlocking rod 110 through the second elastic part 132, the impact force between the first unlocking rod 110 and the second unlocking rod 120 is buffered by the second elastic part 132, avoiding a hard impact on the locking mechanism 300. This contributes to the durability of the unlocking linkage device 100 and the locking mechanism 300. The first elastic part 131 is used to apply a downward force to the first unlocking lever 110 after unlocking is completed, so that the first unlocking lever 110 returns to its original position relative to the battery pack 400. When the second unlocking lever 120 pushes the first unlocking lever 110 to unlock the locking mechanism 300, the elastic force of the first elastic part 131 can also buffer the collision force between the first unlocking lever 110 and the locking mechanism 300. Furthermore, the unlocking linkage device 100 is located on the battery pack 400, making it easy to replace. Even if damaged, it will not affect the operation of the electric vehicle and the battery swapping equipment; only the other battery pack 400 needs to be replaced.

[0081] In the initial state, the first elastic part 131 is pre-compressed. The pre-compressed first elastic part 131 generates pre-pressure on the first unlocking rod 110, which can increase the reaction force and avoid the impact of electric vehicle vibration on the unlocking component.

[0082] In this embodiment, the first elastic part 131 and the second elastic part 132 are preferably springs. In other embodiments, they can also be various elastic components that can provide elastic force, such as torsion springs and disc springs, including elastic components that generate elastic force through their own deformation and elastic components that expand and contract through external media such as gas and liquid.

[0083] like Figure 6 and Figure 7As shown, the first unlocking rod 110 includes a first limiting portion 190 and a first elastic portion 131 sleeved on the first unlocking rod 110. The two ends of the first elastic portion 131 abut against the mounting member 140 (in this embodiment, the inner top side of the mounting member 140) and the first limiting portion 190, respectively. The first limiting portion 190 and the mounting member 140 together restrict the position of the first elastic portion 131, preventing it from dislodging. Simultaneously, the first limiting portion 190 and the mounting member 140 on the first unlocking rod 110 are fully utilized for limiting, simplifying the limiting structure. The first elastic portion 131 applies a downward force to the first unlocking rod 110, causing the first unlocking rod 110 to reset relative to the mounting member 140. In this embodiment, the first limiting portion 190 is further configured as a pin, inserted into the first unlocking rod 110 in the form of a pin. In other embodiments, the first limiting part 190 may also be other structures, such as a known fixing method such as a boss formed on the first unlocking rod 110. Alternatively, in some other embodiments, the first limiting part 190 may not be used, and the limiting of one end of the first elastic part 131 may be achieved by means of, for example, adhesive bonding or by directly connecting one end of the first elastic part 131 to the first unlocking rod 110.

[0084] like Figures 6-8 As shown, the first unlocking lever 110 includes a second limiting part, and the two ends of the second elastic part 132 abut against the second limiting part and the second unlocking lever 120, respectively. The second elastic part 132 can be limited by the second limiting part to prevent it from disengaging from the first unlocking lever 110, and always maintain contact with and function on the first unlocking lever 110.

[0085] like Figures 5-7 As shown, the first unlocking rod 110 includes a first segment 111, a second segment 112, and a third segment 113 connected in sequence. The outer diameters of the first segment 111, the second segment 112, and the third segment 113 decrease sequentially. In the initial state, the first segment 111 is located above the mounting member 140, and more specifically, above the mounting bracket 142. The first elastic part 131 is sleeved on the second segment 112, and the second elastic part 132 is sleeved on the third segment 113. The third segment 113 is inserted into the second unlocking rod 120. The first elastic part 131 and the second elastic part 132 are fixed and limited by the first segment 111, the second segment 112, and the third segment 113. The first unlocking rod 110 can be directly manufactured, simplifying the overall structure. Of course, in other embodiments, the first unlocking rod 110 can also be other suitable shapes and is not limited to the method of this embodiment.

[0086] like Figure 10As shown, the first segment 111 includes a transition segment 114 connected to the second segment 112, and the transition segment 114 has an inclined outer peripheral surface. The inclined outer peripheral surface facilitates processing, provides better positioning with other structures, and accommodates different processing errors. Of course, in other embodiments, the transition segment 114 may not be provided, or it may be set to other shapes.

[0087] like Figures 6-8 As shown, a first limiting part 190 is disposed on the second segment 112. The two ends of the first elastic part 131 abut against the mounting bracket 142 and the first limiting part 190, respectively. The two ends of the second elastic part 132 abut against the second segment 112 and the second unlocking lever 120, respectively. The change in diameter between the second segment 112 and the third segment 113 serves as the second limiting part, thus limiting one end of the second elastic part 132, reducing the number of internal limiting structures and simplifying the structure. In other embodiments, besides providing a second limiting part, the second elastic part 132 can also be limited by other known methods.

[0088] like Figures 6-8 As shown, the mounting component 140 includes a mounting base 141, and a second unlocking rod 120 passes through the mounting base 141. The second unlocking rod 120 has a limiting portion that abuts against the mounting base 141. The mounting base 141 can limit the second unlocking rod 120, preventing separation between the second unlocking rod 120 and the mounting base 141, thus ensuring the integrity of the mounting base 141 and the second unlocking rod 120. In this embodiment, the upper dimension of the second unlocking rod 120 is larger than its lower dimension to form a boss 121. The boss 121 serves as the limiting portion of the second unlocking rod 120, abutting against the mounting base 141. In other embodiments, the second unlocking rod 120 can also be limited to the mounting base 141 by other known limiting methods.

[0089] like Figures 6-8 As shown, the mounting component 140 also includes a mounting bracket 142 mounted on the mounting base 141. A first unlocking lever 110 passes through the mounting bracket 142. The first unlocking lever 110 includes a third limiting portion. In the initial state, the third limiting portion partially limits the first unlocking lever 110 above the mounting bracket 142. Wherein, in... Figure 8 The preferred embodiments shown are and Figure 11 In another embodiment shown, the third limiting portion can be the first segment 111 itself. Because the first segment 111 is relatively large, the resulting transition segment 114 can form an engaging relationship, whether engaged in… Figure 8 The guide cylinder 160 shown is or Figure 11The limiting plates 145 in the mounting bracket 142 ensure that the first segment 111 remains above the mounting bracket 142. The mounting bracket 142 is fully utilized to limit the first unlocking lever 110, preventing its separation from the mounting base 141 and ensuring the integrity of the mounting base 141 and the first unlocking lever 110. Simultaneously, it ensures that the first unlocking lever 110 does not fall from above the mounting bracket 142 in its initial state.

[0090] like Figures 6-8 As shown, the mounting bracket 142 includes a pair of side protective plates 143 and a limiting plate 145. The limiting plate 145 is located at the top of the two side protective plates 143 and connects the two side protective plates 143. The first unlocking rod 110 passes through the limiting plate 145. The side protective plates 143 can protect both sides of the first unlocking rod 110 and support the limiting plate 145, improving the support strength of the limiting plate and the side protective plates 143. The limiting plate 145 can also limit the first elastic part 131 to prevent it from coming out. In other embodiments, the mounting bracket 142 can also be of other shapes, such as various sheet metal components or shell structures of various shapes. In other embodiments, other limiting structures can be used to replace the limiting plate 145 to limit the first elastic part 131.

[0091] like Figures 6-8 As shown, the mounting bracket 142 also includes a guide plate 144 for guiding the first unlocking lever 110, which is mounted between the two side guard plates 143. The guide plate 144 can improve the support strength of the side guard plates 143. The guide plate 144 can also limit and guide the first unlocking lever 110 to prevent deviation during movement. In other embodiments, other structures can be used to guide the unlocking lever 110, such as grooves or slide rails. When the alignment accuracy requirement is low or there are other auxiliary alignment structures, a guiding structure similar to the guide plate 144 may not be used.

[0092] like Figures 6-8 As shown, the guide plate 144 is located between the first elastic portion 131 and the second elastic portion 132. The guide plate 144 isolates the first elastic portion 131 and the second elastic portion 132, preventing them from interfering with each other. In other embodiments, the guide plate 144 can also be positioned at any location.

[0093] In a preferred embodiment, one of the first unlocking rod 110 and the second unlocking rod 120 has a guide hole, and the other has a guide post, with the guide hole and guide post slidably connected. The guide post and guide hole guide the sliding direction between the first unlocking rod 110 and the second unlocking rod 120, thereby ensuring that the movement directions of the first unlocking rod 110 and the second unlocking rod 120 are in the same straight line, and preventing misalignment of the first unlocking rod 110 and the second unlocking rod 120 during relative movement.

[0094] like Figures 6-8 As shown, in this embodiment, the second unlocking rod 120 includes a guide hole 122. The third segment 113 of the first unlocking rod 110 is inserted into the guide hole 122 as a guide post. The second elastic part 132 is sleeved on the first unlocking rod 110 and abuts against the second unlocking rod 120, or the second elastic part 132 is disposed within the guide hole 122. When the guide hole 122 of the second unlocking rod 120 cooperates with the first unlocking rod 110, the outer wall surface of the guide hole 122 of the second unlocking rod 120 also limits the second elastic part 132, thereby fully utilizing the structure of the guide hole 122 and simplifying the structure. In other embodiments, the guide hole and guide post can also be disposed on the first unlocking rod 110 and the second unlocking rod 120 in various known ways.

[0095] like Figures 6-9 As shown, in this embodiment, the unlocking linkage device 100 further includes a guide cylinder 160. The guide cylinder 160 is installed on the end of the mounting member 140 facing the outlet 220 of the battery pack 400, for positioning with the outlet 220, and is sleeved on the first unlocking rod 110, which moves along the guide cylinder 160. By providing the guide cylinder 160, it can be positioned with the outlet 220 on the battery pack 400, and the first unlocking rod 110 can be guided by the guide cylinder 160 as it moves from the outlet 220 inwards, preventing the first unlocking rod 110 from deviating in its direction of movement and colliding with the outlet 220, thereby protecting the first unlocking rod 110 and the outlet 220. Although this embodiment preferably uses a guide cylinder 160, in other embodiments, for example... Figure 11 In the embodiment shown, the guide cylinder 160 may not be provided.

[0096] like Figures 5-9As shown, the end of the guide cylinder 160 away from the mounting member 140 has a first mating portion 161. The outer peripheral shape of the first mating portion 161 is adapted to the shape of the outlet 220. The first mating portion 161 extends into the outlet 220 from one side and at least partially extends out from the other side of the outlet 220. The first mating portion 161 is fitted into the outlet 220 of the battery pack 400, and the first mating portion 161 ensures, at least by its own extending shape, that the movement of the first unlocking lever 110 on both sides of the outlet 220 is always guided by the guide cylinder 160.

[0097] like Figure 9 As shown, an inclined guide surface 1613 is formed between the end face 1611 and the outer peripheral surface 1612 of the first mating part 161. The inclined guide surface 1613 guides the first mating part 161 during insertion into the outlet 220, facilitating insertion of the first mating part 161 into the outlet 220. In other embodiments, the guide surface 1613 may be of other shapes, or other guiding structures may be used for guidance.

[0098] like Figure 9 As shown, the guide cylinder 160 includes a guide cylinder body 1600, with a first mating portion 161 located at one end of the guide cylinder body 1600. The outer circumferential dimension of the guide cylinder body 1600 is larger than the dimension of the outlet 220. The larger size of the guide cylinder body 1600 prevents it from detaching from the outlet 220, ensuring that the guide cylinder body 1600 does not leave the battery pack 400. In other embodiments, the guide cylinder body 1600 can also be other shapes, not limited to a cylindrical shape, as long as it can hold the outlet 220 in place.

[0099] like Figure 9 As shown, the other end of the guide cylinder body 1600 is provided with a second mating part 162. The second mating part 162 is inserted into the opening at the top of the mounting member 140, that is, into the opening of the limiting plate 145. The outer circumferential dimension of the second mating part 162 is smaller than that of the guide cylinder body 1600. The larger size of the guide cylinder body 1600 prevents the guide cylinder body 1600 from being completely inserted into the mounting member 140, thereby playing a limiting role. The guide cylinder body 1600 can also be other shapes, not limited to a cylindrical shape, as long as it can be locked in place.

[0100] like Figure 9 As shown, the first mating part 161 has a first opening 1601, and the second mating part 162 has a second opening 1602. The first opening 1601 and the second opening 1602 are connected. The first unlocking rod 110 passes through the first opening 1601 and the second opening 1602 and is inserted into the guide cylinder 160. The first unlocking rod 110 moves within the first opening 1601 and the second opening 1602, and is completely separated from the outlet 220 by the guide cylinder 160, thus avoiding contact and collision with the outlet 220.

[0101] like Figure 9 As shown, the second opening 1602 is smaller than the first opening 1601. The smaller second opening 1602 can limit the first unlocking rod 110, preventing the first unlocking rod 110 from sliding down from inside the guide cylinder 160 to below the guide cylinder 160.

[0102] like Figure 9 As shown, the guide cylinder 160 has a guide space 163 inside. The shape of the guide space 163 is adapted to the first unlocking rod 110. At least a portion of the first unlocking rod 110 is located within the guide space 163 and moves along the guide space 163. The guide space 163 can better guide the movement of the first unlocking rod 110, ensuring the smooth movement of the first unlocking rod 110.

[0103] like Figure 9 As shown, in a further preferred embodiment, the guide space 163 includes a first guide space 164 and a second guide space 165. The first guide space 164 has a limiting surface 166 connected to the second guide space 165. In the initial state, a portion of the first unlocking rod 110, i.e., the first segment 111 in this embodiment, is limited within the first guide space 164 by the limiting surface 166. The limiting surface 166 ensures that at least a portion of the first unlocking rod 110 always slides within the first guide space 164.

[0104] like Figures 5-9 As shown, the top of the first unlocking lever 110 has a smooth shape. Or, for example... Figure 12 In this case, a rolling element 170 is provided at the top of the first unlocking lever 110. The smooth top and the rolling element 170 can improve the smoothness of movement when the first unlocking lever 110 cooperates with the locking mechanism 300 and reduce the wear of the first unlocking lever 110 and the locking mechanism 300.

[0105] like Figure 12 As shown, in other embodiments, the rolling element 170 is directly mounted on the end of the first unlocking lever 110 or as... Figure 12 The first unlocking lever 110 is fixed to the end of the first unlocking lever 110 by a mounting part 180. The rolling element 170 is confined to the end of the first unlocking lever 110 or the mounting part 180 and rolls relative to the end of the first unlocking lever 110 or the mounting part 180. The rolling element 170 can be easily disassembled and replaced by the mounting part 180.

[0106] like Figures 5-9As shown, the bottom of the unlocking component has an input end plate 150, which is circular in the figure. In a preferred embodiment, the extending direction of the input end plate 150 is consistent with the extending direction of the unlocking surface on the locking mechanism 300, that is, the direction in which the battery pack 400 extends relative to the horizontal movement of the unlocking mechanism. The input end plate 150 allows the unlocking mechanism to always contact the input end plate 150 at different positions along the unlocking direction during the unlocking process. The input end 150 protrudes from the bottom of the battery pack 400. During unlocking, the unlocking mechanism presses against the input end plate 150 from the bottom position of the battery pack 400, thereby driving the unlocking linkage device 100 to lift upward.

[0107] like Figure 13 and Figure 14 As shown, Figure 13 and Figure 14 The images above all show the locked state. Figure 13 and Figure 14The figures below show the unlocked state. The locking mechanism 300 of the battery pack assembly in this embodiment includes a locking link 320 and several locking bases 310. The locking bases 310 have locking grooves 340, and at least some of the locking bases 310 have locking tongues 330. The locking tongues 330 are movably installed in the locking grooves 340 and can prevent the locking member 210 from disengaging from the locking grooves 340. The locking link 320 is movably connected to the locking bases 310 through the locking tongues 330. The bottom of the locking link 320 has an unlocking surface extending along the length of the locking link 320. Under the action of external force, the first unlocking rod 110 abuts against the unlocking surface and pushes up the locking link 320, thereby driving the locking tongues 330 to open the locking grooves 340. During the unlocking process, firstly, the external unlocking device acts on the second unlocking lever 120, causing the locking member 210 to move horizontally a preset distance within the locking groove 340, separating the locking member 210 from the bolt 330 to prevent interference between the bolt 330 and the locking member 210 when the bolt is opened. During this horizontal movement, the unlocking mechanism of the external unlocking device abuts against the second unlocking lever 120, and the second elastic part 132 is pre-compressed and stores force under the action of the unlocking mechanism. Then, the unlocking mechanism pushes the second unlocking lever 120 upwards. The unlocking lever 120 presses against the second elastic part 132 and drives the first unlocking lever 110 to rise. During this process of rising the first unlocking lever 110, the second elastic part 132 is compressed and stores energy. The second elastic part 132 is compressed and stores energy during the above two processes, so that the first unlocking lever 110 can open the locking link 320 while the second elastic part 132 is compressed. During the process of the first unlocking lever 110 opening the locking link 320, the top end of the first unlocking lever 110 slides horizontally along the unlocking surface and abuts against the unlocking surface. Specifically, both ends of the latch 330 are hinged to the lock base 310 and the locking link 320. During the process of the locking link 320 being lifted, the latch 330 rotates, opening the space of the locking groove, so that the locking member 210 can move horizontally to the right. At the same time, the lock base 310 remains fixed, so the movement trajectory of the locking link is not a linear translation, but rather an upward movement with... Figure 13 and Figure 14 The movement is horizontal to the right. During this process, the first unlocking lever 110 only moves upward, thus its position in the horizontal direction relative to the locking lever 320 also changes.

[0108] During the process of the locking member 210 moving horizontally to the right within the locking groove 340, the first unlocking rod 110 continuously abuts against the unlocking surface, keeping the locking tongue 330 in the open state, ensuring that the locking member 210 can be smoothly moved out of the locking groove 340, and improving the reliability of unlocking.

[0109] like Figure 14As shown, in a preferred embodiment, the locking link 320 includes an unlocking block 321 extending toward the lock base 310. The unlocking block 321 has a horizontally extending unlocking surface at its bottom, and the first unlocking rod 110 acts on the unlocking surface of the unlocking block 321. The horizontally extending unlocking surface allows the first unlocking rod 110 to abut against the unlocking block 321 during movement relative to the locking link 320, preventing it from getting stuck in any position and improving unlocking stability. The horizontal unlocking surface provides greater tolerance; even if the first unlocking rod 110 is misaligned or has a torsional angle, it can always remain within the unlocking surface.

[0110] In other embodiments, the unlocking surface may also be configured as a concave square, a concave arc, a concave triangle, or a concave rhombus, extending along the length of the locking rod 320. A concave square unlocking surface can restrict the first unlocking rod 110, preventing it from detaching from the unlocking surface during unlocking. A concave arc, triangle, or rhombus unlocking surface can form an optimal unlocking line with the first unlocking rod 110 and allow for appropriate tolerance, enabling the first unlocking rod 110 to move within the unlocking surface along the length of the locking rod 320 and facilitating the stopping of the unlocking device.

[0111] In a further preferred embodiment, the unlocking surface of the unlocking block 321 is provided with a buffer structure, such as an elastic component like a rubber pad, and the first unlocking rod 110 acts on the buffer structure. By placing the buffer structure at the unlocking surface, the first unlocking rod 110 will directly exert force on the buffer structure. The buffer structure reduces the impact of the first unlocking rod 110 on the locking rod 320, extends the service life of the locking rod 320, and reduces wear caused by collision and friction between the first unlocking rod 110 and the locking rod 320.

[0112] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An unlock linkage for unlocking a locking mechanism on an electric vehicle, characterized by, The unlocking linkage device comprises an unlocking member and a mounting member, the unlocking member is mounted on the battery pack through the mounting member, the unlocking member comprises a first unlocking rod and a second unlocking rod, the first unlocking rod is elastically connected with the mounting member through a first elastic part, the second unlocking rod is elastically connected with the first unlocking rod through a second elastic part, the second elastic part is arranged in a spaced manner with the first elastic part, and a top end of the first unlocking rod can be extended from an outlet of the battery pack and unlock a locking mechanism on the electric vehicle.

2. The unlocking linkage of claim 1, wherein, The first unlocking rod comprises a first limiting part, the first elastic part is sleeved on the first unlocking rod, and two ends of the first elastic part are respectively abutted against the mounting member and the first limiting part.

3. The unlocking linkage of claim 1, wherein, One of the first unlocking rod and the second unlocking rod has a guide hole, and the other has a guide column, and the guide hole and the guide column are in sliding connection.

4. The unlocking linkage of claim 3, wherein, The second unlocking rod comprises a guide hole, the first unlocking rod is inserted into the guide hole, and the second elastic part is sleeved on the first unlocking rod and abutted against the second unlocking rod, or the second elastic part is arranged in the guide hole.

5. The unlocking linkage of claim 4, wherein, The first unlocking rod comprises a second limiting part, and two ends of the second elastic part are respectively abutted against the second limiting part and the second unlocking rod.

6. The unlocking linkage of claim 1, wherein, The mounting member comprises a mounting seat, the second unlocking rod passes through the mounting seat, and a limiting part is arranged on the second unlocking rod to abut against the mounting seat.

7. The unlocking linkage of claim 6, wherein, The mounting member further comprises a mounting frame mounted on the mounting seat, the first unlocking rod passes through the mounting frame, the first unlocking rod comprises a third limiting part, and in an initial state, the third limiting part partially limits the first unlocking rod above the mounting frame.

8. The unlocking linkage of claim 7, wherein, The mounting frame further comprises a guide plate for guiding the first unlocking rod, and the guide plate is located between the first elastic part and the second elastic part.

9. The unlocking linkage of claim 7, wherein, The first unlocking rod comprises a first limiting part, the first unlocking rod comprises a first segment, a second segment and a third segment connected in sequence, the outer diameters of the first segment, the second segment and the third segment decrease in sequence, and the first limiting part is arranged on the second segment; in an initial state, the first segment is located above the mounting frame, the first elastic part is sleeved on the second segment, and two ends of the first elastic part are respectively abutted against the mounting frame and the first limiting part; the second elastic part is sleeved on the third segment, two ends of the second elastic part are respectively abutted against the second segment and the second unlocking rod, and the third segment is inserted into the second unlocking rod.

10. The unlocking linkage of claim 1, wherein, The unlocking linkage device further comprises a guide cylinder, the guide cylinder is mounted on one end of the mounting member facing the outlet, is used for positioning the outlet, is sleeved on the first unlocking rod, and the first unlocking rod moves along the guide cylinder.

11. The unlocking linkage of claim 10, wherein, An end of the guide cylinder away from the mounting member has a first matching part, an outer peripheral shape of the first matching part is matched with a shape of the outlet, the first matching part extends from one side of the outlet and at least partially extends from the other side of the outlet.

12. The unlocking linkage of claim 11, wherein, An inclined guide surface is formed between an end face and an outer peripheral face of the first matching part.

13. The unlocking linkage of claim 11, wherein, The guide cylinder comprises a guide cylinder body, the first matching part is located at one end of the guide cylinder body, and the outer peripheral dimension of the guide cylinder body is greater than the dimension of the outlet.

14. The unlocking linkage of claim 10, wherein, The guide cylinder has a guide space inside, the guide space is shaped to match the first unlocking rod, at least a part of the first unlocking rod is located in the guide space and moves along the guide space.

15. The unlocking linkage of claim 1, wherein, The top end of the first unlocking rod is rounded; or the top end of the first unlocking rod is provided with a rolling member.

16. The unlocking linkage of claim 1, wherein, The bottom of the unlocking member is provided with an input end plate, and the extension direction of the input end plate is consistent with the extension direction of the unlocking surface on the locking mechanism.

17. A battery pack assembly, characterized by The battery pack and the unlocking linkage device as claimed in any one of claims 1-16 are included, and the unlocking linkage device is arranged in the vertical direction through the battery pack.

18. An electric vehicle characterized by comprising: The battery pack assembly as claimed in claim 17 and the locking mechanism are included, the locking mechanism is arranged on the electric vehicle, the locking mechanism is used for cooperating with the locking member on the battery pack to lock, and the unlocking linkage device is used for unlocking the locking mechanism and the locking member.

19. The electric vehicle of claim 18, wherein, The locking mechanism comprises a plurality of lock bases and a lock connecting rod, the lock bases are provided with locking grooves, at least part of the lock bases is provided with lock tongues, the lock tongues are movably arranged in the locking grooves and can prevent the locking member from being separated from the locking grooves, the lock connecting rod is movably connected with the lock bases through the lock tongues, the bottom of the lock connecting rod has an unlocking surface extending along the length direction of the lock connecting rod, and the first unlocking rod is abutted against the unlocking surface to lift the lock connecting rod and keep the lifting state under the action of an external force, and the top end of the first unlocking rod slides horizontally along the unlocking surface in the lifting process.

20. The electric vehicle of claim 19, wherein, The unlocking surface is provided with a buffer structure, and the first unlocking rod acts on the buffer structure.

Images