CN116118452A

CN116118452A - Battery pack and electric vehicle with same

Info

Publication number: CN116118452A
Application number: CN202211305923.9A
Authority: CN
Inventors: 张建平; 于新瑞; 褚佳玮; 张小春
Original assignee: Aulton New Energy Automotive Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd
Priority date: 2022-07-15
Filing date: 2022-10-24
Publication date: 2023-05-16
Also published as: CN219007567U; CN218558547U; CN218558546U; CN218536328U; CN116118466A; CN116118457A; CN219096474U; CN116118453A; CN218577492U; CN218558542U; CN218805182U; CN116409129A; CN218577489U; CN116252607A; CN116118455A; CN116353319A; CN219096472U; CN116001548A; CN218558548U; CN218577493U

Abstract

The invention discloses a battery pack and a battery-replacing vehicle, wherein the battery pack comprises: a case; the locking piece is arranged at the top of the box body and comprises a mounting frame and a locking shaft, and the locking shaft is connected with the mounting frame; when the battery pack is locked on the battery change vehicle, the locking shaft of the battery pack moves from bottom to top and is locked on the locking mechanism of the battery change vehicle in a bead expansion locking mode. The locking piece is arranged at the top of the box body, so that the locking piece at the battery pack end positioned below and the vehicle end locking mechanism of the battery-changing vehicle positioned above can be positioned at a position which is spatially opposite to each other, a locking and unlocking mode of directly upwards and downwards is realized, and the locking and unlocking efficiency is improved; compared with the condition that the locking piece is arranged at the bottom of the box body or close to the bottom, the locking piece is arranged at the top of the box body, so that vibration impact on the top of the battery pack in the driving process is effectively reduced. In addition, the bead expansion locking mode is convenient and quick to assemble and disassemble, and the locking is stable and reliable.

Description

Battery pack and electric vehicle with same

This patent application claims priority to the chinese patent application No. 2022108378041 filed on 7.15 2022.

Technical Field

The invention relates to the technical field of electric automobiles, in particular to a battery pack and a battery replacing vehicle.

Background

The existing battery pack mounting mode of the electric automobile is generally divided into fixed mounting and replaceable mounting, wherein the battery pack which is fixedly mounted is generally fixed on the automobile; the replaceable safety-rotating battery pack generally adopts a movable mounting mode, and the battery pack can be taken down at any time to be replaced or charged, and is mounted on the vehicle body after the replacement or charging is finished.

For the battery of interchangeable installation, after the installation, because the external factor such as installation insecurity or vehicle road jolt, the battery can appear dropping the condition, and the battery once drops, will be very dangerous to the vehicle of traveling, directly threatens the personal safety of personnel on the car. Therefore, how to firmly lock the battery on the vehicle and to efficiently disassemble and assemble the battery pack is a problem that needs to be solved in order to ensure safety at present. In the prior art, battery packs on electric vehicles are all arranged above a vehicle beam, so that the gravity center of the electric vehicles is deviated, the running stability is poor, the vehicles are powered through the whole battery packs, the weight is heavy, when the battery packs are required to be replaced, the battery packs are replaced by the overhead crane at present, the battery packs are easy to shake and are difficult to align with the electric vehicles, the battery packs are difficult to replace, and the locking and unlocking efficiency is low.

Disclosure of Invention

The invention aims to overcome the defects of high electricity exchanging cost and inconvenient electricity exchanging caused by placing a battery pack on a vehicle body of an electric heavy-truck or light-truck vehicle in the prior art.

The invention solves the technical problems by the following technical scheme:

a battery pack, the battery pack comprising:

a case;

the locking piece is arranged at the top of the box body and comprises a mounting frame and a locking shaft, and two ends of the locking shaft are connected to the mounting frame;

when the battery pack is locked on the battery change vehicle, the locking shaft of the battery pack moves from bottom to top and is locked on the locking mechanism of the battery change vehicle in a bead expansion locking mode.

In the scheme, the locking piece is arranged at the top of the box body, so that the locking piece at the battery pack end positioned below and the vehicle end locking mechanism of the battery-changing vehicle positioned above can be positioned at a position which is opposite to each other in space, a direct up-down locking and unlocking mode is realized, and the locking and unlocking efficiency is improved; compared with the condition that the locking piece is arranged at the bottom of the box body or close to the bottom, the locking piece is arranged at the top of the box body, so that vibration impact on the top of the battery pack in the driving process is effectively reduced. In addition, the bead expansion locking mode is convenient and quick to assemble and disassemble, and the locking is stable and reliable.

Preferably, the lock shaft comprises a rising bead, and the locking mechanism comprises a lock seat; or, the lock shaft comprises a lock seat, and the locking mechanism comprises a rising bead;

the expansion beads are detachably connected with the lock seats to independently lock the battery packs on the quick-change bracket or the vehicle beam.

In the scheme, one of the expansion bead and the lock seat can move from bottom to top, the expansion bead is detachably connected with the lock seat, and when the expansion bead and the lock seat are locked, the battery pack is connected with the electric vehicle; when the expanding bead is separated from the lock seat, the battery pack is separated from the battery-powered vehicle, and the locking mode is simple, the structure is reliable, and the efficiency is improved.

Preferably, the expanding beads are arranged on the battery pack, and the lock seat is arranged on the quick-change bracket or the vehicle beam;

or the lock seat is arranged on the battery pack, and the expansion beads are arranged on the quick-change bracket or the vehicle beam.

In the scheme, one of the expansion bead and the lock seat is arranged on the battery pack, the other one of the expansion bead and the lock seat is arranged on the vehicle, and when the expansion bead and the lock seat are locked or unlocked, the battery pack and the vehicle can be correspondingly locked or unlocked. The expansion bead and the lock seat which are connected with the vehicle are arranged on the quick-change bracket, so that the quick-change bracket can be integrally connected with the vehicle, and the manufacturing efficiency is improved; or the vehicle beam is directly used as a mounting part, so that the structure is compact.

Preferably, the expanding bead or the lock seat is arranged at the middle position of the battery pack, and the expanding bead or the lock seat penetrates through the battery pack.

In this scheme, rise pearl or lock seat setting in the intermediate position of battery package, be convenient for through a pearl locking structure locking battery package and the vehicle that trades that rises for load evenly distributed is on the battery package, has effectively avoided the deformation of battery package, has improved the stability and the shock resistance of battery package. The expanding bead or the lock seat penetrates through the battery pack, namely, the locking penetrates through the battery pack, so that the locking is reliable.

Preferably, the expanding beads or the lock seats are connected to the battery pack in a floating mode.

In this scheme, floating connection plays the effect of buffering, can reduce the hard collision between pearl or lock seat and the battery package that rises, prevents to change the moment of torsion or vibrations transmission to the battery package when the electric vehicle receives turning distortion or jolt, and then has reduced the circumstances that pearl or lock seat wear and battery package damage rise.

Preferably, the expansion bead or the lock seat is connected to the quick-change bracket or the vehicle beam in a floating manner.

In this scheme, floating connection plays the effect of buffering, can reduce the hard collision between pearl or lock seat and the vehicle that trades, prevents to trade the vehicle and is receiving the moment of torsion or the vibrations transmission to quick change support or roof beam when turning to distortion or jolting, and then has reduced the circumstances that pearl or lock seat wear and battery package damaged that rises.

Preferably, the locking piece further comprises a driving rod, the expanding beads are arranged at the top of the driving rod, the lock seat is provided with a locking groove, and the driving rod is used for lifting or rotating in the vertical direction under the action of an external mechanism so as to drive the expanding beads to be abutted to the locking groove for locking, or to enable the expanding beads to be withdrawn out of the locking groove.

In this scheme, drive the actuating lever through drive division and rise or rotate along vertical direction to make the pearl butt that rises lock or break away from the lock seat unblock on the lock seat, be convenient for operate.

Preferably, the expanding bead comprises a driving ball and a locking ball, the driving ball is arranged at the top of the driving rod, and the driving ball is used for lifting in the vertical direction under the driving of the driving rod and driving the locking ball to enter the locking groove for locking.

In this scheme, realize the pearl locking that rises through the cooperation of drive ball and locking ball, simple structure is reliable.

Preferably, the locking piece further comprises a housing, and the driving rod is arranged in the housing and can be lifted or rotated along the vertical direction relative to the housing.

Preferably, the housing has a first channel arranged along a vertical direction, and a second channel arranged along a circumferential direction of the first channel, and the second channel penetrates through the housing and is communicated with the first channel, and the driving rod is used for lifting or rotating in the first channel so as to push the locking ball from the second channel into the locking groove to be locked, or to withdraw the locking ball from the locking groove.

Preferably, the number of the locking balls is plural, and the plural locking balls are uniformly arranged in the circumferential direction of the driving lever.

In this scheme, set up a plurality of locking balls, a plurality of locking balls are along the circumference evenly distributed of actuating lever, and the homoenergetic is balanced when rising pearl and lock seat locking.

Preferably, the structure of the expanding bead locking mode further comprises an anti-rotation and anti-back structure, and the anti-rotation and anti-back structure is connected with the expanding bead and/or the lock seat so as to prevent relative rotation between the expanding bead and the lock seat.

In this scheme, the above-mentioned structure has avoided rising pearl and has produced relative rotation when the lock seat cooperation, guarantees the fixed between locking piece and the locking mechanism locking, and then has guaranteed battery package and quick change leg joint's stability.

Preferably, the anti-rotation anti-return structure is used for limiting the rotation of the expanding bead relative to the lock seat in a matching mode of one of ratchet pawls, expanding beads, clamping and meshing.

Preferably, the battery pack has long sides and short sides;

the number of the locking pieces is two, and the two locking pieces are arranged on two sides of the box body along the extending direction of the long side and/or the extending direction of the short side of the box body.

In the scheme, when the weight of the box body is lighter, the locking piece can be arranged along the extending direction of the short side of the box body, so that the requirement of bearing the quality of the battery pack is met; when the box body is heavier, compare in the minor face extending direction of box body, establish the locking piece in the box body both sides along the long limit extending direction of box body, more effectively bear the whole weight of battery package, avoid the box body in the intermediate position department of its long limit extending direction, because of not having the bearing capacity of locking piece and lead to probably producing sagging or deformation to improve the reliability that the locking piece born the battery package. The two locking pieces are distributed on two sides of the box body, so that the stress of the box body is balanced, and the stability of the battery pack is facilitated.

Preferably, the locking piece comprises at least two lock shafts, and the at least two lock shafts are arranged at intervals along the same direction of the box body.

In the scheme, the locking piece adopts at least two lock shafts, and compared with the condition of only one lock shaft, more lock bearings are used for carrying the battery pack, so that the reliability and the stability of the battery pack carried by the battery pack are facilitated. At least two lock shafts are distributed at intervals along the same direction of the box body, so that the battery pack is guaranteed to bear the gravity of the battery pack by more lock bearings in the same direction of the box body, the stress of the battery pack at different positions is balanced by the arrangement at intervals, and the reliability of the battery pack borne by the locking piece is improved.

Preferably, the lock shafts of each locking piece are arranged at intervals along the extending direction of the long side of the box body.

In this scheme, compare in the minor face extending direction of box, the long limit extending direction of box has born more weight of battery package, sets up the lock axle interval along the long limit extending direction of box with every locking piece, has born the weight of battery package more, avoids the box in the intermediate position department of its long limit extending direction, because of not having the bearing capacity of lock axle and lead to probably producing sagging or deformation to improve the reliability that the locking piece born the battery package.

Preferably, any lock shafts are arranged in parallel, and the axial direction of the lock shafts is perpendicular to the extending direction of the long side of the box body.

In this scheme, mutual parallel arrangement between the arbitrary lock axle for the horizontal angle of lock axle is unified, thereby when making locking mechanism and locking piece carry out straight up-down motion, the pairing angle of each locking mechanism and corresponding lock axle is unified, reduces the possibility that the trouble was paired to the appearance.

Preferably, the battery pack further comprises a buffer member provided on an outer side surface of the locking member, which is far away from the vertical plate of the battery pack.

In this scheme, the setting height of bolster is improved as far as possible to make in the horizontal direction bolster set up and be located between battery package and the battery replacement car, thereby avoid the cooperation position at battery replacement car and battery package top to receive the impact.

Preferably, the upper surface of the box body is provided with a concave structure, the locking piece is arranged in the concave structure, and the connection position of the lock shaft and the mounting frame is not higher than the upper surface of the box body.

In the scheme, the concave structure is arranged on the upper surface of the box body, the locking piece is arranged in the concave structure, the space of the concave structure is utilized to install and fix the locking piece, and the ground clearance of the battery pack after being connected to the battery-changing vehicle is improved; the connecting position of the lock shaft and the mounting frame is not higher than the upper surface of the box body, so that the lock shaft is prevented from colliding with the vehicle body of the battery replacement vehicle, the surface structure of the battery pack is kept neat, and the possibility that the locking piece is interfered with the vehicle body of the battery replacement vehicle or other components in space is avoided.

Preferably, the concave structure is a step arranged at two sides of the box body along the extending direction of the long side of the box body.

In the scheme, steps on two sides of the box body are used as concave structures, so that the box body can be conveniently processed; the steps are arranged on the two sides of the box body along the extending direction of the long side of the box body, namely the locking pieces are arranged on the two sides of the box body along the extending direction of the long side of the box body, so that the whole weight of the battery pack is effectively borne, the situation that the box body is sagged or deformed in the middle position of the extending direction of the long side of the box body due to the fact that the bearing capacity of the locking pieces is not available is avoided, the reliability of bearing the battery pack by the locking pieces is improved, the stress of the box body is balanced, and the stability of bearing the battery pack is facilitated.

Preferably, the recess structure includes a step bottom surface and a step side wall, the height of the mounting frame of the locking member is not greater than the height of the step side wall, and the width of the mounting frame is not greater than the width of the step bottom surface.

In this scheme, establish the step of undercut in the both sides of box along the long limit extending direction of box for establish the locking piece among the concave structure and set up along the long limit extending direction of box, more effectively bear the whole weight of battery package. Setting the height of the mounting frame to be not greater than the height of the recessed side walls so that the mounting frame is below the top surface of the box without protruding the top surface and possibly interfering with the mounting of other components; the width of the mounting frame is set to be not more than the width of the bottom surface of the concave, so that the mounting frame is positioned in the side surface of the box body and does not protrude out of the side surface, and the surface structure of the battery pack is kept neat.

Preferably, the battery pack further comprises an unlocking hole, the unlocking hole is arranged corresponding to the position of the locking piece, and the unlocking hole is used for allowing an external device to pass through so as to unlock or lock the locking piece.

In the scheme, external equipment such as an unlocking device and the like can pass through the unlocking hole to act on the locking piece, so that the battery pack is locked or unlocked.

Preferably, the battery pack further includes a buffer member provided on a side of the battery pack.

In the scheme, when the battery pack is mounted on the battery exchange vehicle, the side face (namely the horizontal direction) of the box body is subjected to larger vibration relative to the upper and lower surface directions (namely the directions for jacking the battery pack) of the box body, namely the box body is easy to collide with the battery exchange vehicle, and the buffer piece is arranged on the side face of the box body along the directions for jacking the battery pack, so that the vibration of the battery pack in the horizontal direction is effectively buffered; and may be provided on one or more sides of the housing as needed for different vibration damping.

Preferably, the number of the buffer members is plural, and the plurality of buffer members are arranged on the box body along at least one horizontal direction;

when a plurality of buffer pieces are arranged on the same surface of the box body, the buffer pieces are arranged at intervals.

In the scheme, the plurality of buffer pieces are arranged on the box body along at least one horizontal direction, so that the vibration of the battery pack caused by the battery-changing vehicle is buffered in one horizontal direction or a plurality of horizontal directions; when a plurality of buffer parts are arranged on the same surface of the box body, the buffer parts are arranged at intervals, so that vibration impact received by different positions of the battery pack is balanced, and the buffer effect is improved.

Preferably, the buffer member is disposed at an upper portion of the battery pack in a direction of lifting the battery pack.

In this scheme, compare in the lower part position of battery package, the upper portion of battery package receives to go or with locking or unblock produced vibration ratio great because of direct with trading electric vehicle installation connection, with the setting of bolster in the upper portion of battery package, directly, effectively absorbed the vibration, improved the overall stability of battery package.

Preferably, the buffer member is circumferentially arranged on the side surface of the box body.

In this scheme, establish the bolster week in the side of box, all be equipped with the bolster on all sides of box circumference promptly, the vibration of the different grade type that each side of box probably received has been buffered, and buffer protection is more comprehensive, further improves the overall stability of battery package.

Preferably, the battery pack further comprises a battery pack end electric connector for communicating with a vehicle end electric connector of the battery-changing vehicle, and the electric connector is arranged on the upper surface or the side surface of the box body along the direction of jacking the battery pack.

In the scheme, when the battery pack end electric connector is arranged on the side face of the box body, the requirement of connecting the side face with the electric connector can be met; when the battery pack end electric connector is arranged on the upper surface of the box body along the direction of jacking the battery pack, the battery pack end electric connector and the corresponding vehicle end electric connector on the battery exchange vehicle form a relative position relationship, so that the insertion or separation of the electric connector can be realized in a straight up-down motion mode, the connection mode is simple, and the reliability is high.

Preferably, the battery pack further comprises a battery pack water receiving port connected with a vehicle end water receiving port on the battery exchange vehicle, and the battery pack water receiving port is arranged on the upper surface or the side surface of the box body along the direction of jacking the battery pack.

In the scheme, when the battery pack water receiving port is arranged on the side surface of the box body, the requirement of communicating the side surface with the water receiving port can be met; when the battery pack water receiving port is arranged on the upper surface of the box body along the direction of jacking the battery pack, the battery pack water receiving port and the corresponding vehicle end water receiving port on the battery exchange vehicle form a relative position relationship, so that the direct up-down movement mode not only meets the locking or unlocking of the battery pack, but also realizes the communication of the water receiving port, the connection mode is simple, the communication distance is shortened, and the efficiency is improved.

The utility model provides a trade electric vehicle, trade electric vehicle includes automobile body, quick change support, locking mechanism and foretell battery package, quick change support connect in the automobile body, just locking mechanism set up in on the quick change support, the battery package through its lock axle through rise pearl locking mode with locking mechanism detachable connect in on the quick change support.

In the scheme, the battery pack is adopted by the vehicle for replacing, so that a direct up-down locking and unlocking mode is realized; the reliability of the lock shaft connection is improved, the vibration of the battery pack is reduced, and the service life of the lock shaft is prolonged. In addition, the bead expansion locking mode is convenient and quick to assemble and disassemble, and the locking is stable and reliable.

Preferably, the battery pack is arranged along the longitudinal direction of the battery-replacing vehicle, and the long side of the battery pack is perpendicular to the longitudinal direction of the battery-replacing vehicle.

In this scheme, with a plurality of battery packs along the length direction of trading the electric vehicle arrangement to the length direction of trading the electric vehicle is perpendicular to the long limit of battery pack, and make full use of the length direction of vehicle has great space, can arrange more battery packs, has improved the utilization ratio in space and the capacity of battery pack. The long side of the battery pack is perpendicular to the length direction of the battery replacing vehicle, so that the long side face with a large area on the box body can be used for bearing the impact of the battery pack in the running direction of the vehicle, and the battery pack is protected.

Preferably, the battery pack is located below the quick-change bracket.

In this scheme, with the battery package setting in the below of quick change support for the locking mechanism of the quick change support that is located the top and the locking axle of the battery package that is located the below form upper and lower relative position, and this trades the electric vehicle through adopting above-mentioned battery package, has realized a specific locking and unlocking mode of directly going up straight down, thereby has realized the mode of trading the electricity from the vehicle bottom.

Preferably, the battery-powered vehicle is an electric truck.

In the scheme, the electric truck adopting the battery pack realizes a locking and unlocking mode of directly up and down.

The invention has the positive progress effects that: the locking piece is arranged at the top of the box body, so that the locking piece at the battery pack end positioned below and the vehicle end locking mechanism of the battery-changing vehicle positioned above can be positioned at a position which is spatially opposite to each other, a locking and unlocking mode of directly upwards and downwards is realized, and the locking and unlocking efficiency is improved; compared with the condition that the locking piece is arranged at the bottom of the box body or close to the bottom, the locking piece is arranged at the top of the box body, so that vibration impact on the top of the battery pack in the driving process is effectively reduced. In addition, the bead expansion locking mode is convenient and quick to assemble and disassemble, and the locking is stable and reliable.

Drawings

Fig. 1 is a schematic structural diagram of a battery-powered vehicle according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a case in a top view according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a bottom view of a case according to an embodiment of the present invention;

FIG. 4 is a schematic view of a locking assembly according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a locking assembly according to an embodiment of the present invention;

FIG. 6 is a bottom view of a locking assembly according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a buffer and a limiting structure according to an embodiment of the present invention;

FIG. 8 is a schematic perspective view of an elastic member according to an embodiment of the present invention;

FIG. 9 is a front view of an elastic member according to an embodiment of the present invention;

fig. 10 is a side view of an elastic member according to an embodiment of the present invention.

Description of the reference numerals

The battery pack 1, the case 2, the long side 111, the short side 112, the step 22, the step bottom surface 223, the step side wall 222, the unlocking hole 23, the mount 9,

locking member 200, expansion bead 210, connecting post 211, guide projection 213, lock base 220, locking groove 221,

a locking assembly 3, a connecting member 321, a mounting hole 3211, a mounting sleeve assembly 322, a first mounting sleeve 3221, a second mounting sleeve 3222, a locking body 323, a housing 3231, a housing limit step 32311, a limit bump 32312, a locking ball 3232, a driving rod 3233, a driving ball 3234, a mounting sleeve limit 324, a first limit step 3241, a second limit step 3242, a limit groove 32421,

the buffer 20, the limit member 101, the elastic member 201, the mounting portion 203, the mounting hole 204, the protrusion portion 2111, the upper inclined surface 2112, the lower inclined surface 2113, the left inclined surface 2114, the right inclined surface 2115, the free end 218, the engagement portion 219,

The battery pack end electric connector 4, the battery pack end water gap 5, the car beam 7 and the quick-change bracket 8.

Detailed Description

The invention is further illustrated by means of examples which follow, without thereby restricting the scope of the invention thereto.

The embodiment of the invention provides a battery pack 1, and as shown in fig. 1, the battery pack 1 is used for being connected with a battery-powered vehicle and supplying power to the battery-powered vehicle. The battery pack 1 is arranged at the bottom of the vehicle, so that external power conversion equipment can enter the bottom of the power conversion vehicle, and power conversion operation is facilitated.

As shown in fig. 2, the battery pack 1 includes a case 2 and a locking member 200 provided at the top of the case 2, the locking member 200 including a mounting bracket 9 and a locking shaft, both ends of the locking shaft being connected to the mounting bracket 9; when the battery pack 1 is locked on the battery change vehicle, the locking shaft of the battery pack 1 moves from bottom to top and is locked on the locking mechanism of the battery change vehicle in a bead expansion locking mode.

In this embodiment, the locking member 200 is disposed at the top of the box 2, so that the locking member 200 at the end of the battery pack 1 located below and the vehicle end locking mechanism of the battery exchange vehicle located above are located at spatially opposite positions, thereby implementing a locking and unlocking mode directly above and below, and improving the locking and unlocking efficiency; the provision of the lock member 200 at the top of the casing 2 more effectively reduces the shock of the battery pack 1 at the top during running, than in the case where the lock member 200 is provided at or near the bottom of the casing 2. In addition, the bead expansion locking mode is convenient and quick to assemble and disassemble, and the locking is stable and reliable.

The embodiment discloses a structure of a bead expansion locking mode, which can be applied to the locking of a battery pack 1 and a battery exchange vehicle, wherein a locking shaft comprises a bead expansion 210, and a locking mechanism comprises a locking seat 220; alternatively, the lock shaft includes a lock base 220, and the locking mechanism includes an expansion bead 210; the expansion beads 210 are detachably connected with the lock seats 220 to realize independent locking of the battery pack 1 on the quick-change bracket 8 or the vehicle beam 7.

In specific implementation, one of the expansion bead 210 and the lock seat 220 can move from bottom to top, so that locking between the expansion bead 210 and the lock seat 220 is realized, and further locking with a battery-powered vehicle is realized. Accordingly, the unlocking between the expansion bead 210 and the lock seat 220 can be achieved by moving one of the expansion bead 210 and the lock seat 220 from top to bottom, so that the battery pack 1 can be separated from the battery exchange vehicle.

As shown in fig. 2 and fig. 4, the expanding bead 210 includes a connecting column 211 and a plurality of locking balls 3232, and the plurality of locking balls 3232 can move on the connecting column 211, so that the plurality of locking balls 3232 are exposed out of the outer surface of the connecting column 211 or retract into the connecting column 211, so as to realize that the locking balls 3232 are propped against and locked on the lock base 220 or the expanding bead 210 and the lock base 220 are mutually unlocked.

Specifically, as shown in fig. 2, the connection post 211 is connected to the battery pack 1 and extends in the vertical direction. A plurality of locking balls 3232 are provided around the circumferential direction of the connection post 211 and at the upper portion of the connection post 211. Accordingly, as shown in fig. 4, a locking groove 221 matching the locking ball 3232 is provided in the locking cavity of the locking socket 220. The locking ball 3232 can move relative to the connection post 211 along the radial direction of the connection post 211 such that, when locked, the locking ball 3232 protrudes from the outer sidewall of the connection post 211 to be connected with the locking groove 221; when unlocked, the locking balls 3232 retract into the connection posts 211 and disengage from the locking grooves 221.

Further, the plurality of locking balls 3232 can be uniformly arranged around the circumferential direction of the connecting column 211, so as to promote the balance of stress after the connection between the expansion bead 210 and the lock base 220, and promote the stability of locking. As shown in fig. 2, the expansion bead 210 is provided with four locking balls 3232, and the four locking balls 3232 are uniformly arranged along the circumferential direction of the side wall of the connection post 211.

Further, as shown in fig. 2, a guide protrusion 213 is further provided on the top of the connection post 211, so that the connection post 211 is aligned with the lock base 220, thereby improving locking efficiency.

The structure of the bead expansion locking mode can be referred to as patent grant publication number CN210941321U, of course, the specific structure of the bead expansion locking mode is not limited to the structure of patent grant publication number CN210941321U, but may also be other structures, and is not limited specifically.

In specific implementation, according to the actual working condition requirement, one of the expansion bead 210 and the lock seat 220 can be arranged on the battery pack 1, and the other is arranged on the battery-replacing vehicle. The components connected to the battery change vehicle can be connected in particular to the quick change bracket 8 or the vehicle beam 7 of the battery change vehicle. When the quick-change bracket 8 is connected with the vehicle beam 7, so that the expanded beads 210 or the lock seats 220 are connected with the vehicle through the quick-change bracket 8, and when the expanded beads 210 or the lock seats 220 are multiple, the quick-change bracket 8 can be integrated, and the installation efficiency can be improved by being integrally installed on the vehicle beam 7 of the vehicle. Or, the expansion bead 210 or the lock seat 220 is directly arranged on the beam 7 of the battery-changing vehicle, so that the installation space can be saved, and the structure is compact.

In one embodiment, as shown in fig. 2 and 3, the expansion bead 210 is disposed on the battery pack 1, and the lock base 220 is disposed on the quick-change bracket 8 or the vehicle beam 7. The battery pack 1 is connected to the quick-change bracket 8 or the vehicle beam 7 in a locking way by connecting the expansion beads 210 to the lock seat 220. During locking, the external device can drive the expansion bead 210 to move from bottom to top, so as to lock the expansion bead 210 and the lock seat 220, and further lock the battery pack 1 and the electric vehicle. During unlocking, the external device drives the expanding beads 210 and the lock bases 220 to separate from each other, so that the unlocking of the battery pack 1 is realized.

Specifically, fig. 2 shows a schematic structural diagram of the battery pack 1, and the battery pack 1 has a plurality of beads 210.

In another embodiment, the lock base 220 is disposed on the battery pack 1, and the expansion beads 210 are disposed on the quick-change bracket 8 or the vehicle beam 7. During locking, the lock seat 220 can be driven by external equipment to move from bottom to top, and simultaneously rotate relative to the expansion bead 210, so that the lock seat 220 and the expansion bead 210 are locked, and the battery pack 1 and the electric vehicle are locked. During unlocking, the lock seat 220 is driven by external equipment to rotate relative to the expansion beads 210 and move from top to bottom, and the lock seat 220 is separated from the expansion beads 210, so that the unlocking of the battery pack 1 is realized.

As a preferred embodiment, the expansion bead 210 or the lock base 220 is disposed at the middle position of the battery pack 1, and the expansion bead 210 or the lock base 220 penetrates through the battery pack 1. The expanded bead 210 or the lock seat 220 is arranged at the middle position of the battery pack 1, so that the battery pack 1 and the battery replacement vehicle are conveniently locked through an expanded bead locking structure, the load is uniformly distributed on the battery pack 1, the deformation of the battery pack 1 is effectively avoided, and the stability and the shock resistance of the battery pack 1 are improved. The bead 210 or the lock seat 220 penetrates the battery pack 1, i.e., the lock penetrates the battery pack 1, so that the lock is reliable.

As a preferred embodiment, the expansion bead 210 or the lock base 220 is floatingly connected to the battery pack 1. The floating connection plays a role in buffering, so that hard collision between the expansion bead 210 or the lock seat 220 and the battery pack 1 can be reduced, torque or vibration of the battery pack 1 when the vehicle is subjected to steering torsion or jolt is prevented from being transmitted to the battery pack 1, and abrasion of the expansion bead 210 or the lock seat 220 and damage of the battery pack 1 are further reduced

As a preferred embodiment, the expansion bead 210 or the lock base 220 is floatingly connected to the quick-change bracket 8 or the vehicle beam 7. The floating connection plays a role in buffering, so that hard collision between the expansion beads 210 or the lock bases 220 and the replacement vehicle can be reduced, torque or vibration of the replacement vehicle when the replacement vehicle is subjected to steering torsion or jolt is prevented from being transmitted to the quick-change bracket 8 or the vehicle beam 7, and abrasion of the expansion beads 210 or the lock bases 220 and damage to the battery pack 1 are further reduced.

As a preferred embodiment, the locking member 200 further includes a driving rod 3233, the expansion bead 210 is disposed on top of the driving rod 3233, the locking seat 220 has a locking groove 221, and the driving rod 3233 is used for lifting or rotating in a vertical direction under the action of an external mechanism, so as to drive the expansion bead 210 to abut into the locking groove 221 for locking, or to withdraw the expansion bead 210 from the locking groove. The driving part drives the driving rod 3233 to lift or rotate along the vertical direction, so that the expanding beads 210 are abutted on the lock seat 220 to lock or are separated from the lock seat 220 to unlock, and the operation is convenient.

As a preferred embodiment, the expanding bead 210 includes a driving ball 3234 and a locking ball 3232, the driving ball 3234 is disposed on the top of the driving rod 3233, and the driving ball 3234 is used to lift in the vertical direction under the driving of the driving rod 3233 and drive the locking ball 3232 into the locking groove 221 for locking. The expansion bead 210 is locked through the cooperation of the driving ball 3234 and the locking ball 3232, and the structure is simple and reliable.

As a preferred embodiment, the locking member 200 further includes a housing 3231, and the driving lever 3233 is provided within the housing 3231 and is vertically movable or rotatable with respect to the housing 3231.

As a preferred embodiment, the housing 3231 has a first passage provided in a vertical direction and a second passage provided in a circumferential direction of the first passage, and the second passage penetrates the housing 3231 and communicates with the first passage, and the driving lever 3233 is for lifting or rotating in the first passage to push the locking ball 3232 from the second passage into the locking groove 221 or withdraw the locking ball 3232 from the locking groove 221.

As a preferred embodiment, the number of the locking balls 3232 is plural, and the plurality of locking balls 3232 are uniformly arranged along the circumferential direction of the driving rod 3233. The plurality of locking balls 3232 are arranged, the plurality of locking balls 3232 are uniformly distributed along the circumferential direction of the driving rod 3233, and the stress is balanced when the expanding beads and the lock seat are locked.

As a preferred embodiment, the structure of the locking manner of the expansion bead further comprises an anti-rotation and anti-back structure, which is connected to the expansion bead 210 and/or the lock base 220 to prevent the relative rotation between the expansion bead 210 and the lock base 220. The relative rotation generated when the expanding beads 210 are matched with the lock seat 220 is avoided, the fixation between the locking piece 200 and the locking of the locking mechanism is ensured, and the connection stability of the battery pack 1 and the quick-change bracket 8 is further ensured. The anti-rotation anti-return structure achieves the purpose of limiting the relative rotation of the expansion bead 210 and the lock seat 220 through one of a ratchet, a pawl, an expansion bead, a clamping and a meshing.

As a preferred embodiment, as shown in fig. 4, 5 and 6, the present embodiment also discloses a locking assembly 3, where the locking assembly 3 includes a locking member 200 and a locking mechanism, the locking member 200 is mounted on the battery pack 1, and the locking mechanism is mounted on the beam 7 or the quick-change bracket 8 of the battery-powered vehicle; or the locking mechanism is mounted on the battery pack 1, and the locking member 200 is mounted on the beam 7 of the battery-changing vehicle or the quick-change bracket 8.

Specifically, the locking mechanism comprises a lock seat 220, and a locking groove 221 matched with the locking piece 200 is formed in the lock seat 220; the locking piece 200 comprises a connecting piece 321, a mounting sleeve assembly 322 and a locking body 323, wherein the connecting piece 321 is used for connecting the battery pack 1, or the quick-change bracket 8 or the vehicle beam 7, the connecting piece 321 is provided with a mounting hole 3211, the mounting sleeve assembly 322 is sleeved on the locking body 323, the locking body 323 is mounted in the mounting hole 3211 through the mounting sleeve assembly 322, and the locking body 323 can be locked or separated from the locking seat 220 of the locking mechanism relatively.

The locking body 323 includes a housing 3231, a driving rod 3233, and an expanding bead, and the driving rod 3233 is provided in the housing 3231 and is vertically movable or rotatable with respect to the housing 3231. The expanding bead includes a driving ball 3234 and a plurality of locking balls 3232, the driving ball 3234 is disposed on top of the driving rod 3233, the housing 3231 has a first channel disposed along a vertical direction, and a second channel disposed along a circumference of the first channel, and the second channel penetrates the housing 3231 and communicates with the first channel, the driving rod 3233 is disposed in the first channel of the housing 3231, the driving rod 3233 and the driving ball 3234 are used for driving the locking ball 3232 to move between a first position and a second position relative to the housing 3231, and when the locking ball 3232 is disposed in the first position, the locking ball 3232 partially protrudes out of the second channel of the housing 3231 and is locked with the locking seat 220 of the locking mechanism. When the locking ball 3232 is in the second position, the locking ball 3232 is positioned within the second passageway of the housing 3231 and is disengaged from the lock base 220 of the locking mechanism.

The mounting sleeve assembly 322 includes a first mounting sleeve 3221 and a second mounting sleeve 3222, the outer surface of the first mounting sleeve 3221 is provided with a first threaded section, and the inner surface of the second mounting sleeve 3222 is provided with a second threaded section that mates with the first threaded section to threadably couple the first mounting sleeve 3221 to the second mounting sleeve 3222.

The locking and unlocking process of the locking component 3 locked by the expanding bead in the embodiment is as follows:

when the locking piece 200 and the locking mechanism need to be locked, the driving rod 3233 is screwed up, the driving rod 3233 lifts the driving ball 3234, and the driving ball 3234 further drives the locking ball 3232 to extend out of the shell 3231, so that the locking ball 3232 and the locking groove of the locking seat 220 of the locking mechanism are clamped and locked.

When the locking member 200 and the locking mechanism need to be unlocked, the driving rod 3233 is reversely rotated to lower the driving rod 3233, so that the acting force of the driving rod 3233 on the driving ball 3234 and the acting force of the driving ball 3234 on the locking ball 3232 can be sequentially released, and the locking ball 3232 is separated from the locking mechanism to realize unlocking.

The locking piece 200 further comprises a mounting sleeve limiting piece 324 arranged on the second mounting sleeve 3222, the mounting sleeve limiting piece 324 comprises a first limiting step 3241 and a second limiting step 3242, the housing 3231 of the locking body 323 is provided with a housing limiting step 32311, the housing limiting step 32311 is arranged between the first limiting step 3241 and the second limiting step 3242, the distance between opposite faces of the first limiting step 3241 and the second limiting step 3242 is equal to the thickness of the housing limiting step 32311, further, the second limiting step 3242 is provided with a limiting groove 32421, the housing limiting step 32311 is provided with a limiting projection 32312, and the limiting projection 32312 is positioned in the limiting groove 32421 so that the second limiting step 3242 is matched and connected with the housing limiting step 32311. The housing stop step 32311, the first stop step 3241 and the second stop step 3242 cooperate to form an anti-rotation stop feature to limit movement of the locking body 323 relative to the mounting sleeve assembly 322.

Preferably, in the present embodiment, the second limiting step 3242 is fixed to the first limiting step 3241 by a screw to form a detachable connection, so that the housing limiting step 32311 of the housing 3231 is conveniently fixed between the first limiting step 3241 and the second limiting step 3242.

Preferably, the first and second stop steps 3241 and 3242 are detachably connected so as to fix the housing stop step 32311 of the housing 3231 between the first and second stop steps 3241 and 3242.

As a preferred embodiment, as shown in fig. 2, locking pieces 200 are disposed on two opposite sides of the battery pack 1, when the battery pack 1 is locked with the electric vehicle, the two opposite sides of the battery pack 1 can be connected with the electric vehicle, so that the gravity of the battery pack 1 is carried on the two sides, the overall stress condition of the battery pack 1 is balanced, and the reliability of the connection between the battery pack 1 and the electric vehicle is improved. In other embodiments, the locking member 200 may be disposed at other positions of the battery pack 1, such as at a middle position of the battery pack 1.

Specifically, the battery pack 1 has a long side 111 and a short side 112; the number of the locking members 200 is two, and the two locking members 200 are provided on both sides of the case 2 along the extending direction of the long side 111 and/or the extending direction of the short side 112 of the case 2.

In a specific implementation, when the weight of the case 2 is light, the locking member 200 may be disposed along the extending direction of the short side 112 of the case 2, so as to meet the requirement of carrying the weight of the battery pack 1; when the mass of the case 2 is heavier, compared with the extending direction of the short side 112 of the case 2, the locking members 200 are arranged at two sides of the case 2 along the extending direction of the long side 111 of the case 2, so that the overall weight of the battery pack 1 is more effectively borne, sagging or deformation of the case 2 at the middle position of the extending direction of the long side 111 thereof due to the fact that the locking members 200 are not borne is avoided, and the reliability of the locking members 200 bearing the battery pack 1 is improved. The two locking pieces 200 are distributed on two sides of the box body 2, so that the stress of the box body 2 is balanced, and the stability of the battery pack 1 carried by the battery pack is facilitated. As shown in fig. 2 and 3, a schematic view of the latch 200 is shown as it extends along the long side 111 of the case 2.

As shown in fig. 2, the locking member 200 includes at least two locking shafts, and the at least two locking shafts are arranged at intervals along the same direction of the case 2. The locking member 200 adopts at least two locking shafts, and compared with the condition of only one locking shaft, the battery pack 1 is carried by more locking bearings, so that the reliability and the stability of the battery pack 1 carried by the battery pack are facilitated. At least two lock shafts are distributed at intervals along the same direction of the box body 2, so that the battery pack 1 is guaranteed to bear the gravity of the battery pack 1 by more lock bearings in the same direction of the box body 2, the stress of the battery pack 1 at different positions is balanced by adopting the spaced distribution, and the reliability of bearing the battery pack 1 by the locking piece 200 is improved.

As shown in fig. 2, the lock shafts of each lock member 200 are arranged at intervals along the extending direction of the long side 111 of the case 2. Compared with the extending direction of the short side 112 of the box body 2, the extending direction of the long side 111 of the box body 2 bears more weight of the battery pack 1, the lock shafts of each locking piece 200 are arranged at intervals along the extending direction of the long side 111 of the box body 2, more weight of the battery pack 1 is borne, and the situation that the box body 2 is possibly drooping or deformed due to the fact that no bearing force of the lock shafts exists at the middle position of the extending direction of the long side 111 of the box body is avoided, so that the reliability of the locking piece 200 for bearing the battery pack 1 is improved.

As shown in fig. 2, any lock shafts are arranged parallel to each other, and the axial direction of the lock shafts is arranged in a direction perpendicular to the extending direction of the long side 111 of the case 2. Any lock shafts are arranged in parallel, so that the horizontal angles of the lock shafts are unified, and when the locking mechanism and the locking piece 200 move vertically upwards and downwards, the pairing angles of the locking mechanisms and the corresponding lock shafts are unified, so that the possibility of pairing faults is reduced.

Further, as shown in fig. 2, the locking members 200 on each side are provided with four beads 210, which are uniformly spaced along the length direction of the battery pack 1. Accordingly, the number of the expansion beads 210 may be adjusted accordingly according to the volume size or weight of the battery pack 1; for example, when the battery pack 1 is small or the locking member 200 is provided in the extending direction of the short side 112 thereof, only one expansion bead 210, that is, only two expansion beads 210 may be provided at both ends of the locking member 200, as needed. Moreover, the spacing arrangement distance of the expanded beads 210 can be correspondingly adjusted according to the number of the expanded beads 210, the gravity distribution of the battery pack 1, the size of the box body 2 and other factors; the axial direction of the expanding bead 210 may also have an included angle with the extending direction of the long side 111 of the box 2, and only the setting angle of the locking mechanism needs to be correspondingly adjusted at this time, which is not described herein.

As shown in fig. 2, the expansion beads 210 of the locking pieces 200 at both sides are disposed in one-to-one correspondence, so that the locking pieces 200 at both sides form a symmetrical structure. When the battery pack 1 is locked and unlocked with the replacement vehicle, the actions of the two-side locking pieces 200 are identical, and the unlocking and locking efficiency and reliability are improved.

As shown in fig. 2, the upper surface of the case 2 is provided with a concave structure, the locking member 200 is provided in the concave structure, and the connection position of the lock shaft and the mounting bracket 9 is not higher than the upper surface of the case 2. By arranging a concave structure on the upper surface of the box body 2 and arranging the locking piece 200 in the concave structure, the space of the concave structure is utilized to install and fix the locking piece 200, and the ground clearance of the battery pack 1 after being connected to a battery-changing vehicle is improved; the connecting position of the lock shaft and the mounting frame 9 is not higher than the upper surface of the box body 2, so that the lock shaft is prevented from colliding with the body of the battery replacement vehicle, the surface structure of the battery pack 1 is kept neat, and the locking piece 200 is prevented from possibly interfering with the body of the battery replacement vehicle or other components in space.

Compared with the rising bead 210 arranged on the upper surface of the box body 2, when the rising bead 210 is locked with the locking mechanism on the battery replacement vehicle, the gravity center of the battery pack 1 can be enabled to be closer to the locking mechanism, the stability of connection is improved, the distance between the battery pack 1 and the ground can be increased, and the external battery replacement device can conveniently enter the lower part of the battery replacement vehicle to perform battery replacement operation.

As shown in fig. 2, the recessed structure is a step 22 provided on both sides of the case 2 in the extending direction of the long side 111 of the case 2. The steps 22 on the two sides of the box body 2 are used as concave structures, so that the box body 2 can be conveniently processed; the steps 22 are arranged at two sides of the box body 2 along the extending direction of the long side 111 of the box body 2, namely, the locking pieces 200 are arranged at two sides of the box body 2 along the extending direction of the long side 111 of the box body 2, so that the whole weight of the battery pack 1 is effectively borne, sagging or deformation of the box body 2 at the middle position of the extending direction of the long side 111 of the box body is avoided due to the fact that the bearing capacity of the locking pieces 200 is not available, the reliability of the battery pack 1 borne by the locking pieces 200 is improved, the stress of the box body 2 is balanced, and the stability of the battery pack 1 borne by the battery pack is facilitated.

In other embodiments, the recess may be formed in a middle or other location of the case 2 instead of the steps 22 on both sides of the case 2, as required by the specific structure.

Wherein, as shown in fig. 2, the recess structure includes a step bottom surface 223 and a step side wall 222, the height of the mounting frame 9 of the locking member 200 is not greater than the height of the step side wall 222, and the width of the mounting frame 9 is not greater than the width of the step bottom surface 223. The step 22 recessed downward is provided at both sides of the case 2 along the extending direction of the long side 111 of the case 2, so that the locking member 200 provided in the recessed structure is provided along the extending direction of the long side 111 of the case 2, more effectively carrying the entire weight of the battery pack 1. The height of the mounting frame 9 is set to be not greater than the height of the recessed side walls so that the mounting frame 9 is below the top surface of the case 2 without protruding the top surface and possibly interfering with the mounting of other components; the width of the mounting frame 9 is set to be not greater than the width of the bottom surface of the recess so that the mounting frame 9 is located inside the side surface of the case 2 without protruding the side surface, so that the surface structure of the battery pack 1 is kept neat.

Further, as shown in fig. 2, each of the expansion beads 210 has a corresponding mounting frame 9, and when there is a problem with the expansion beads 210, the corresponding mounting frame 9 can be flexibly maintained or replaced. Specifically, the bottom of the expansion bead 210 is connected to the step bottom 223 of the concave structure through the mounting frame 9, the expansion bead 210 extends along the vertical direction, and the top of the expansion bead protrudes out of the upper surface of the box 2, so that the mounting connection position of the expansion bead 210 is consistent with the stress direction of the expansion bead 210, and the connection stability is improved.

In other embodiments, the mounting frame 9 may be a part of the battery pack 1, such as the step bottom 223, so that the expansion bead 210 can be directly connected with the battery pack 1, the structure can be simplified, and meanwhile, the space occupied by the expansion bead 210 in the vertical direction is reduced, so that the structure is more compact. In other embodiments, the mounting frame 9 of the plurality of expansion beads 210 may be a unitary structure, such as an elongated plate-like structure. More specifically, it may be a structure having a U-shaped cross section. During installation and assembly, the expansion beads 210 can be connected with the installation frame 9 first and integrally connected with the battery pack 1, so that the installation efficiency can be improved.

As a preferred embodiment, the battery pack 1 further includes an unlocking hole 23, the unlocking hole 23 being provided corresponding to the position of the locking member 200, the unlocking hole 23 being used for passing through an external device to unlock or lock the locking member 200. External devices such as unlocking means may pass through the unlocking hole 23 to act on the locking member 200, thereby locking or unlocking the battery pack.

As shown in fig. 3, at the corresponding position of each expansion bead 210, the battery pack 1 has an unlocking hole 23, and the unlocking hole 23 extends along the vertical direction and penetrates through the upper and lower surfaces of the battery pack 1, so that an external power conversion device can operate the expansion beads 210 to unlock and lock.

As shown in fig. 2, the battery pack 1 further includes a buffer member 20, and the buffer member 20 is provided on an outer side surface of the locking member 200, which is remote from the vertical plate of the battery pack 1. The installation height of the buffer member 20 is increased as much as possible so that the buffer member 20 is arranged between the battery pack 1 and the battery exchange vehicle in the horizontal direction, thereby avoiding the impact on the mating position of the battery exchange vehicle and the top of the battery pack 1.

As shown in fig. 2, the battery pack 1 further includes a buffer member 20, and the buffer member 20 is provided on a side surface of the battery pack 1. When the battery pack 1 is mounted on the battery exchange vehicle, the side surface (i.e., the horizontal direction) of the box 2 is subjected to larger vibration relative to the upper and lower surface directions of the box 2 (i.e., the direction of lifting the battery pack 1), i.e., the box 2 is easy to collide with the battery exchange vehicle, and the buffer member 20 is arranged on the side surface of the box 2 along the direction of lifting the battery pack 1, so that the vibration of the battery pack 1 in the horizontal direction is effectively buffered; and may be provided on one or more sides of the case 2 as required for different vibration damping.

Specifically, the number of the cushioning members 20 is plural, and the plurality of cushioning members 20 are provided on the case 2 in at least one horizontal direction; when a plurality of cushioning members 20 are provided on the same surface of the case 2, the plurality of cushioning members 20 are provided at intervals. The plurality of cushioning members 20 are arranged on the box body 2 along at least one horizontal direction, so that vibration of the battery pack 1 by the battery-powered vehicle is cushioned in one horizontal direction or a plurality of horizontal directions; when a plurality of buffer members 20 are arranged on the same surface of the box body 2, the plurality of buffer members 20 are arranged at intervals, so that vibration impact received by different positions of the battery pack 1 is balanced, and the buffer effect is improved.

In one embodiment, the cushioning members 20 are disposed circumferentially on the sides of the housing 2. The buffer pieces 20 are circumferentially arranged on the side face of the box body 2, namely, all the side faces in the circumferential direction of the box body 2 are provided with the buffer pieces 20, different types of vibration possibly received by each side face of the box body 2 are buffered, buffering protection is more comprehensive, and the overall stability of the battery pack 1 is further improved.

In another embodiment, the buffer members 20 are provided on the side surfaces of the long sides 111 of the case 2, and a plurality of buffer members 20 are provided on both the long side 111 sides of the battery pack 1, so that the impact in the width direction of the battery pack 1 can be resisted.

In still another embodiment, as shown in fig. 2, the buffer members 20 are provided on the sides of the short sides 112 of the battery pack 1, specifically, two buffer members 20 are provided on the sides of the two short sides 112 of the battery pack 1, and the two buffer members 20 are spaced apart from both ends of the short sides 112, so that the impact applied to the battery pack 1 in the length direction can be resisted.

As shown in fig. 2, the buffer 20 is provided at the upper portion of the battery pack 1 in the direction of lifting the battery pack 1. Compared with the lower part of the battery pack 1, the upper part of the battery pack 1 is directly connected with the vehicle for replacing and is subjected to running or larger vibration generated by locking or unlocking, and the buffer piece 20 is arranged on the upper part of the battery pack 1, so that the vibration is directly and effectively absorbed, and the overall stability of the battery pack 1 is improved.

In the present embodiment, the cushioning material 20 is provided on the side surface of the case 2. The buffer pieces 20 are circumferentially arranged on the side face of the box body 2, namely, all the side faces in the circumferential direction of the box body 2 are provided with the buffer pieces 20, different types of vibration possibly received by each side face of the box body 2 are buffered, buffering protection is more comprehensive, and the overall stability of the battery pack 1 is further improved.

As shown in fig. 7-10, the damper 2020 includes an elastic member 201 and a limiting member 101, and when the battery pack 1 is connected to the battery-powered vehicle, the elastic member 201 abuts against the limiting member 101.

The elastic member 201 includes a mounting portion 203 for mounting the elastic member 201 to the inner side wall of the quick-change holder 8, and a protrusion portion 2111, the protrusion portion 2111 extending to protrude in a direction away from the inner side wall of the quick-change holder 8 with respect to the mounting portion 203. The protrusion 2111 is formed with a groove on a side facing the quick-change holder 8, and a gap defined by the groove is provided between the protrusion 2111 and an inner side wall of the quick-change holder 8 when the elastic member 201 is mounted to the quick-change holder 8. When the battery pack 1 is mounted in the quick-change holder 8, the protrusions 2111 deform toward the inner side wall of the quick-change holder 8.

The protrusion 2111 has an upper inclined surface 2112 and a lower inclined surface 2113 which are provided so as to be opposed to each other and inclined from the protruding end of the protrusion 2111 toward the mounting portion 203.

The protrusion 2111 further has a left inclined surface 2114 and a right inclined surface 2115 which are provided so as to be opposed to each other and inclined from the protruding end of the protrusion 2111 toward the mounting portion 203.

These inclined surfaces provide the protrusions 2111 with better elasticity and better guiding properties to cushion the impact of the battery pack 1.

In the present embodiment, the elastic member 201 includes two protrusions 2111 distributed along the vertical direction. The mounting portion 203 is provided between two adjacent protrusions 2111.

By providing a plurality of protrusions 2111, the elasticity thereof can be ensured well. However, the present invention is not limited thereto, and the number of the protrusions 2111 may be set as needed, or may be set to one or three or more, and the number of the protrusions 2111 does not affect the realization of the function thereof.

In the present embodiment, the upper end of the elastic member 201 is a free end 218, and the free end 218 is connected to one side of the upper inclined surface 2112 of the protrusion 2111. The free end 218 may be a plate-like structure that conforms to the inside wall of the quick-change bracket 8, or the free end 218 may be a plate-like structure that has a gap with the quick-change bracket 8. The elastic member 201 has an engaging portion 219 at a lower end thereof, and the engaging portion 219 engages with an inner wall of the quick-change bracket 8.

As shown in fig. 9, the engagement portion 219 is formed to be bent toward the inner side wall of the quick-change bracket 8 of the electric vehicle. Alternatively, the engaging portion 219 may be formed in a hook shape, which hooks the lower surface of the inner side wall of the quick-change bracket 8, thereby facilitating positioning and mounting of the elastic member 201 with respect to the quick-change bracket 8, and further limiting movement of the elastic member 201 with respect to the quick-change bracket 8. The connection between the engaging portion 219 and the protruding portion 2111 is an arc surface 23, and when the limiting member 101 is engaged from below the elastic member 201, the arc surface 23 facilitates the engagement of the limiting member 101, and prevents the interference of the bottom structure of the elastic member 201 to the upward movement of the limiting member 101.

In other embodiments, the engaging portion 219 may have other shapes that can engage with the inner wall of the quick-change bracket 8. Alternatively, a corresponding groove or the like may be provided in the inner side wall of the quick-change holder 8 to engage with the engagement portion 219.

In other embodiments, the engagement portion 219 may be disposed at an upper end of the elastic member 201, and a lower end of the elastic member 201 is the free end 218. Alternatively, the elastic member 201 may be provided with engagement portions 219 at both upper and lower ends thereof.

Alternatively, the engagement portion 219 may not be provided, so that both the upper and lower ends of the elastic member 201 are free ends 218.

The mounting portion 203 is provided with a mounting hole 204, and the elastic member 201 is fixed to the inner side wall of the quick-change bracket 8 by a screw member. Alternatively, the mounting portion 203 may be fixed to the quick-change holder 8 by other means.

In this embodiment, the elastic member 201 is made of metal, and in other embodiments, the buffer 2020 may have other structures capable of buffering, and the buffer 2020 may also be made of other elastic materials.

As shown in fig. 2, the battery pack 1 further includes a pack end electrical connector 4 for communicating with a car end electrical connector of the battery replacement vehicle, the electrical connector being provided on the upper surface or side surface of the case 2 in the direction of lifting up the battery pack 1. When the battery pack end electric connector 4 is arranged on the side surface of the box body 2, the requirement of connecting the electric connector on the side surface can be met; when the battery pack end electric connector 4 is arranged on the upper surface of the box body 2 along the direction of jacking the battery pack 1, the battery pack end electric connector 4 and the corresponding vehicle end electric connector on the battery exchange vehicle form a relative position relationship, so that the insertion or separation of the electric connector can be realized in a straight up-down motion mode, the connection mode is simple, and the reliability is high.

As shown in fig. 2, the battery pack 1 further includes a battery pack terminal water gate 5 for connection with a vehicle terminal water gate on the battery-changing vehicle, and the battery pack terminal water gate 5 is provided on the upper surface or side surface of the case 2 in the direction of lifting the battery pack 1. When the battery pack water receiving port 5 is arranged on the side surface of the box body 2, the requirement of the side surface for communicating the water receiving port can be met; when the battery pack water receiving port 5 is arranged on the upper surface of the box body 2 along the direction of jacking the battery pack 1, the battery pack water receiving port 5 and the corresponding vehicle end water receiving port on the battery exchange vehicle form a relative position relationship, so that the direct up-down movement mode not only meets the locking or unlocking of the battery pack 1, but also realizes the communication of the water receiving port, the connection mode is simple, the communication distance is shortened, and the efficiency is improved.

This embodiment still provides a trading electric vehicle, as shown in fig. 1, trades electric vehicle and includes automobile body, quick change support 8, locking mechanism and foretell battery package 1, and quick change support 8 is connected in the automobile body, and locking mechanism sets up on quick change support 8, and battery package 1 can dismantle through its lock axle through rising pearl locking mode and locking mechanism and be connected on quick change support 8. The battery pack 1 is adopted by the vehicle for replacing, so that a locking and unlocking mode of direct up and down is realized; the reliability of the lock shaft connection is improved, the vibration of the battery pack 1 is reduced, and the service life of the lock shaft is prolonged. In addition, the bead expansion locking mode is convenient and quick to assemble and disassemble, and the locking is stable and reliable.

As shown in fig. 1, the battery exchange vehicle includes a plurality of battery packs 1, the plurality of battery packs 1 are arranged along the length direction of the battery exchange vehicle, and the long sides 111 of the battery packs 1 are perpendicular to the length direction of the battery exchange vehicle. The plurality of battery packs 1 are distributed along the length direction of the battery exchange vehicle, and the long sides 111 of the battery packs 1 are perpendicular to the length direction of the battery exchange vehicle, so that the longer space of the vehicle in the length direction is fully utilized, more battery packs 1 can be distributed, and the space utilization rate and the capacity of the battery packs 1 are improved. The long side 111 of the battery pack 1 is perpendicular to the length direction of the vehicle, so that the side surface of the long side 111 with a larger area on the box body 2 can be used for bearing the impact on the battery pack 1 in the running direction of the vehicle, and the protection of the battery pack 1 is facilitated.

Further, the battery pack 1 is located below the quick-change bracket 8. The battery pack 1 is arranged below the quick-change bracket 8, so that the locking mechanism of the quick-change bracket 8 positioned above and the locking shaft of the battery pack 1 positioned below form an upper and lower relative position, and the battery pack 1 is adopted by the battery replacement vehicle, so that a specific locking and unlocking mode of directly and directly lifting is realized, and the mode of replacing electricity from the bottom of the vehicle is realized.

Specifically, the battery-powered vehicle is an electric truck. The quick-change bracket 8 is arranged on the beam 7 of the vehicle.

The electric truck requires more energy than a passenger car, and the power supply amount and volume of the battery pack 1 are also larger. When the electric truck is subjected to power change operation, the battery pack 1 is adopted to realize a direct up-down locking and unlocking mode, so that the locking and unlocking steps can be simplified, the power change efficiency can be improved, the shaking of the battery pack 1 in the power change process caused by excessive power change steps can be avoided, and the reliability of power change is improved; furthermore, the energy consumption of the external power conversion equipment during power conversion can be reduced.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims

1. A battery pack, the battery pack comprising:

a case;

the locking piece is arranged at the top of the box body and comprises a mounting frame and a locking shaft, and the locking shaft is connected with the mounting frame;

2. The battery pack of claim 1, wherein the lock shaft comprises an expansion bead and the locking mechanism comprises a lock seat; or, the lock shaft comprises a lock seat, and the locking mechanism comprises a rising bead;

3. The battery pack of claim 2, wherein the battery pack comprises a plurality of battery cells,

the expanding beads are arranged on the battery pack, and the lock seat is arranged on the quick-change bracket or the vehicle beam;

4. A battery pack as claimed in claim 3, wherein the bead or the lock seat is provided at a central position of the battery pack, and the bead or the lock seat penetrates the battery pack.

5. A battery pack as in claim 3 wherein said bead or said lock base is floatingly connected to said battery pack.

6. A battery pack as claimed in claim 3, wherein the bead or the lock base is floatingly connected to the quick change bracket or the vehicle beam.

7. The battery pack according to claim 2, wherein the locking member further comprises a driving rod, the expansion bead is arranged at the top of the driving rod, the locking seat is provided with a locking groove, and the driving rod is used for lifting or rotating in the vertical direction under the action of an external mechanism so as to drive the expansion bead to abut into the locking groove to be locked or to enable the expansion bead to be withdrawn out of the locking groove.

8. The battery pack of claim 7, wherein the expansion bead comprises a driving ball and a locking ball, the driving ball is arranged at the top of the driving rod, and the driving ball is used for lifting in the vertical direction under the driving of the driving rod and driving the locking ball to enter the locking groove for locking.

9. The battery pack of claim 8, wherein the locking member further comprises a housing, and the driving lever is disposed in the housing and is vertically movable or rotatable with respect to the housing.

10. The battery pack according to claim 9, wherein the housing has a first passage provided in a vertical direction and a second passage provided in a circumferential direction of the first passage, and the second passage penetrates the housing and communicates with the first passage, and the driving lever is for lifting or rotating in the first passage to push the locking ball from the second passage into the locking groove or withdraw the locking ball from the locking groove.

11. The battery pack according to claim 9, wherein the number of the locking balls is plural, and the plural locking balls are uniformly arranged in the circumferential direction of the driving rod.

12. The battery pack of claim 2, wherein the bead lock mechanism further comprises an anti-rotation and anti-back mechanism coupled to the bead and/or the lock base to prevent relative rotational movement between the bead and the lock base.

13. The battery pack of claim 12, wherein the anti-rotation stop structure is configured to limit rotation of the expanding bead relative to the lock base by one of a ratchet pawl, an expanding bead, a snap fit, and a mesh fit.

14. The battery pack of claim 1, wherein:

the battery pack has long sides and short sides;

15. The battery pack of claim 14, wherein: the locking piece comprises at least two lock shafts, and the at least two lock shafts are distributed at intervals along the same direction of the box body.

16. The battery pack of claim 15, wherein: the lock shafts of each locking piece are arranged at intervals along the extending direction of the long side of the box body.

17. The battery pack of claim 15, wherein: any lock shafts are arranged in parallel, and the axial direction of the lock shafts is perpendicular to the extending direction of the long side of the box body.

18. The battery pack of claim 16, wherein: the battery pack further comprises a buffer piece, and the buffer piece is arranged on the outer side face, far away from the vertical plate of the battery pack, of the locking piece.

19. The battery pack of claim 18, wherein: the upper surface of box is equipped with the sunk structure, the locking piece is established among the sunk structure, the lock axle with the hookup location of mounting bracket is not higher than the upper surface of box.

20. The battery pack of claim 19, wherein: the concave structure is a step arranged at two sides of the box body along the extending direction of the long side of the box body.

21. The battery pack of claim 20, wherein:

the recessed structure comprises a step bottom surface and a step side wall, the height of the mounting frame of the locking piece is not greater than the height of the step side wall, and the width of the mounting frame is not greater than the width of the step bottom surface.

22. The battery pack of claim 1, wherein: the battery pack further comprises an unlocking hole, the unlocking hole is arranged corresponding to the position of the locking piece, and the unlocking hole is used for allowing external equipment to pass through so as to unlock or lock the locking piece.

23. The battery pack of claim 1, wherein:

the battery pack further includes a buffer member disposed on a side of the battery pack.

24. The battery pack of claim 23, wherein: the buffer parts are multiple and are arranged on the box body along at least one horizontal direction;

25. The battery pack of claim 23, wherein: the buffer member is disposed at an upper portion of the battery pack in a direction of lifting the battery pack.

26. The battery pack of claim 23, wherein: the buffer piece is circumferentially arranged on the side face of the box body.

27. The battery pack of claim 1, wherein: the battery pack further comprises a battery pack end electric connector which is used for being communicated with the vehicle end electric connector of the battery replacing vehicle, and the electric connector is arranged on the upper surface or the side face of the box body along the direction of jacking the battery pack.

28. The battery pack of claim 1, wherein: the battery pack further comprises a battery pack water receiving port connected with a vehicle end water receiving port on the battery replacing vehicle, and the battery pack water receiving port is arranged on the upper surface or the side surface of the box body along the direction of jacking the battery pack.

29. A battery-powered vehicle, characterized by: the battery pack is detachably connected to the quick-change bracket in a bead expansion locking mode through a locking shaft of the battery pack.

30. The battery-powered vehicle of claim 29, wherein: the battery pack is arranged along the length direction of the battery exchange vehicle, and the long side of the battery pack is perpendicular to the length direction of the battery exchange vehicle.

31. The battery-powered vehicle of claim 29, wherein: the battery pack is located below the quick-change bracket.

32. A battery exchange vehicle according to any one of claims 29 to 31, wherein: the battery-powered vehicle is an electric truck.