Quick-change support and electric vehicle

Abstract

The utility model provides a quick-changing support and an electric vehicle, and relates to the field of electric vehicle battery changing. The quick-change support is used for being installed on a beam of the electric vehicle to fix a battery pack, the quick-change support comprises a cantilever beam, a locking mechanism and a fixing mechanism, and the cantilever beam comprises a front cantilever beam body and a rear cantilever beam body which are arranged on the beam at intervals in the length direction of the electric vehicle; the fixing mechanism is arranged between the front cantilever beam and the rear cantilever beam and connected to the front cantilever beam and the rear cantilever beam, and the locking mechanism is arranged on the front cantilever beam and the rear cantilever beam. The locking piece on the battery pack can be mutually locked and fixed with the locking mechanisms on the front cantilever beam and the rear cantilever beam, so that the interference between the battery pack and elements such as a transmission shaft in the middle of the beam is avoided; the integral quick-change bracket can increase the mounting stability between the integral quick-change bracket and the vehicle beam, and can still keep the consistency of the integral structure when the vehicle beam is twisted and the like.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicle battery replacement, in particular to a quick-change bracket and an electric vehicle. Background Art

[0002] At present, the battery pack in an electric vehicle is generally installed on the quick-change bracket of the electric vehicle. Specifically, the quick-change bracket and the battery pack are locked or unlocked by cooperating with the locking member on the battery pack and the locking mechanism installed on the quick-change bracket. For heavy vehicles, such as trucks, the capacity of the battery pack required is very large. The quick-change bracket is connected to the beams arranged in pairs on the electric vehicle to arrange the entire battery pack under the beams to meet the range requirements of the heavy vehicle as much as possible. However, with the continuous upgrading of electric vehicles, electric vehicles are currently usually equipped with transmission shafts and other components in the middle of the paired beams, so that the entire battery pack can no longer be arranged under the beams. In order to adapt to this change in electric vehicles, it is necessary to provide a new quick-change bracket and a battery pack arrangement method.

[0003] In the prior art, the quick-change bracket is independently installed on both sides of the vehicle beam of the electric vehicle, which makes the connection strength between the quick-change bracket and the vehicle beam poor. Since the beam is prone to twisting, the consistency of the brackets on both sides of the beam is poor, which easily leads to the problem of poor installation stability and consistency of the quick-change bracket. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the quick-change bracket is independently installed on both sides of the vehicle beam of an electric vehicle, which easily leads to poor installation stability and consistency of the quick-change bracket, and provide a quick-change bracket and an electric vehicle.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A quick-change bracket, used for being installed on a beam of an electric vehicle to fix a battery pack, is characterized in that the quick-change bracket comprises a cantilever beam, a locking mechanism and a fixing mechanism, the cantilever beam comprises a front cantilever beam and a rear cantilever beam which are arranged on the beam at intervals along the length direction of the electric vehicle, wherein:

[0007] The fixing mechanism is arranged between the front cantilever beam and the rear cantilever beam, and the fixing mechanism is connected to the front cantilever beam and the rear cantilever beam respectively;

[0008] The locking mechanism is arranged on the front cantilever beam and the rear cantilever beam, and the locking mechanism is used to be locked and connected with the locking piece on the battery pack.

[0009] In the present solution, a front cantilever beam and a rear cantilever beam are arranged at intervals on the beam of the electric vehicle along the length direction of the electric vehicle, and a fixing mechanism is connected between the front cantilever beam and the rear cantilever beam, thereby forming an integral quick-change bracket, and a locking mechanism is arranged on the front cantilever beam and the rear cantilever beam. When the battery pack moves toward the beam along the width direction of the electric vehicle, the locking member on the battery pack can be mutually locked with the locking mechanism on the front cantilever beam and the rear cantilever beam, so as to fix the battery pack relative to the quick-change bracket and avoid interference between the battery pack and components such as the transmission shaft in the middle of the beam. At the same time, compared with the quick-change bracket independently installed on both sides of the beam of the electric vehicle, the integral quick-change bracket can increase the installation stability between it and the beam, and when the beam twists, the quick-change bracket can still maintain the consistency of its overall structure, thereby finally meeting the installation stability and consistency requirements of the battery pack.

[0010] Further, the fixing mechanism includes a connecting portion, which is connected between the front cantilever beam and the rear cantilever beam and is used to define the relative position between the front cantilever beam and the rear cantilever beam;

[0011] Preferably, the fixing mechanism further includes a reinforcing portion, which is connected between the connecting portion and the vehicle beam and is used to reinforce the frame structure formed by the connecting portion and the front cantilever beam and the rear cantilever beam.

[0012] In this solution, the connecting part in the fixing mechanism is used to limit the relative position between the front cantilever beam and the rear cantilever beam. The installation positions of the front cantilever beam and the rear cantilever beam are restrained by the connecting part, thereby ensuring that the positional relationship between the front cantilever beam and the rear cantilever beam can remain stable, while also ensuring the stability of the locking mechanism, so that during the installation of the battery pack, its locking part can be accurately locked with the locking mechanism; further, the reinforcement part of the fixing mechanism is connected between the connecting part and the vehicle beam to further enhance the structural stability of the integral quick-change bracket, while also enhancing the overall supporting strength of the quick-change bracket, which is beneficial to improving the safety of the battery pack installation.

[0013] Further, the length of the connecting portion between the front cantilever beam and the rear cantilever beam is adjustable;

[0014] And / or, the connecting portion comprises at least two connecting beams, the at least two connecting beams are arranged at intervals in the extension direction of the front cantilever beam or the rear cantilever beam, and two ends of any one of the connecting beams are respectively connected to the front cantilever beam and the rear cantilever beam;

[0015] Preferably, the reinforcement portion comprises at least one reinforcement beam, an extension direction of the reinforcement beam forms an angle with an extension direction of any one of the connecting beams, and at least one end of the reinforcement beam is connected to one of the connecting beams.

[0016] In the present solution, by setting the length of the connecting part between the front cantilever beam and the rear cantilever beam to be adjustable, the length of the connecting part can be adjusted according to the size of the battery pack during installation, thereby adaptively adjusting the relative position between the front cantilever beam and the rear cantilever beam, and alleviating the installation error of the front cantilever beam and the rear cantilever beam when assembling the battery pack; further, the connecting part specifically includes at least two connecting beams, and multiple connecting beams are used to form multiple restraints between the front cantilever beam and the rear cantilever beam, thereby further reducing the possibility of relative displacement between the front cantilever beam and the rear cantilever beam, and improving the structural strength of the integral quick-change bracket; further, the reinforcement part is used to reinforce the frame structure formed by the connecting part and the front cantilever beam and the rear cantilever beam, wherein the reinforcement beam has an angle with the extension direction of the connecting beam and at least one end is connected to a connecting beam, providing force support for the connecting beam in a direction non-parallel to the connecting beam, thereby improving the overall strength of the fixing mechanism and making the fixing mechanism less likely to deform.

[0017] Further, the at least two connecting beams include two first connecting beams, the two first connecting beams are respectively arranged on both sides of the vehicle beam, and the first connecting beams are connected to corresponding edge positions of the front cantilever beam and the rear cantilever beam in the extending direction;

[0018] Preferably, two ends of the reinforcement beam are respectively connected to the middle positions of the two first connection beams.

[0019] In the present solution, the two first connecting beams are respectively connected to the corresponding edge positions in the extension direction of the front cantilever beam and the rear cantilever beam, so that the installation position between the ends of the front cantilever beam and the rear cantilever beam is restricted by the first connecting beam, thereby avoiding the front cantilever beam or the rear cantilever beam from being unable to fix the installation position between the ends due to torsion, and through the above-mentioned structural form, the connecting beam and the front cantilever beam and the rear cantilever beam are connected to form a frame structure, thereby improving the structural stability of the quick-change bracket; further, the two ends of the reinforcement beam are respectively connected to the middle positions of the two first connecting beams, so that the reinforcement beam also supports the two first connecting beams, thereby reducing the risk of breakage of the first connecting beam and increasing the structural strength of the fixing mechanism.

[0020] Further, the front cantilever beam and the rear cantilever beam are arranged on the vehicle beam along the width direction of the electric vehicle; the locking mechanism on the front cantilever beam and the rear cantilever beam is used to lock or unlock the battery pack arranged on the side of the vehicle beam along the width direction of the electric vehicle;

[0021] And / or, at least ends of the front cantilever beam and the rear cantilever beam on the same side extend out of the vehicle beam, and the locking mechanism is provided at the ends of the front cantilever beam and the rear cantilever beam extending out of the vehicle beam;

[0022] And / or, the quick-change bracket further comprises an electrical connector, the electrical connector is arranged below the vehicle beam along the height direction of the electric vehicle, and the electrical connector is used to be electrically connected to the battery pack;

[0023] And / or, a positioning mark is provided on at least one side of the cantilever beam in the width direction of the electric vehicle.

[0024] In the present solution, the locking mechanism is arranged on the front cantilever beam and the rear cantilever beam, and the locking part of the battery pack is locked or unlocked along the width direction of the electric vehicle, so that the battery pack can be installed on the side of the vehicle beam to avoid interference with components such as the transmission shaft in the middle of the vehicle beam, and the installation path and locking path of the battery pack are both along the width direction of the vehicle, which is beneficial to improve the efficiency of lateral battery replacement of the battery pack; further, the locking mechanism is arranged on the end of the front cantilever beam and the rear cantilever beam extending out of the vehicle beam, so as to adapt to the battery pack being installed on the vehicle beam from the side of the vehicle beam, and being locked and connected with the locking mechanism on the quick-change bracket, and at the same time, locking mechanisms are arranged on the ends of the front cantilever beam and the rear cantilever beam extending out of the vehicle, so that the entire quick-change bracket is in the length direction of the electric vehicle. The forces at both ends are balanced, which is beneficial to improving the stability of the quick-change bracket in carrying the battery pack; further, an electrical connector is provided on the quick-change bracket, and the electrical connector is used to electrically connect to the battery pack to realize power transmission. At the same time, the electrical connector is located below the vehicle beam, so that the battery pack is electrically connected to the electrical connector below the vehicle beam, so as to make full use of the space under the vehicle beam, and at the same time reduce the longitudinal height of the battery pack as much as possible to avoid interference between the battery pack and the components on the upper part of the vehicle; further, by providing positioning marks in the width direction of the electric vehicle, it is used to identify the position of the vehicle body in various directions. When the battery pack of the electric vehicle needs to be replaced, it helps the battery exchange equipment to identify the position where the battery pack is to be installed, so as to realize accurate positioning and accurate installation of the battery pack.

[0025] Further, the cantilever beam includes a locking beam arranged on at least one side of the vehicle beam, the locking beam is used to arrange the locking mechanism, and is connected to the battery pack through the locking mechanism; the quick-change bracket also includes a reinforcement connection mechanism, and the locking beam is connected to the side of the vehicle beam through the reinforcement connection mechanism;

[0026] Preferably, the reinforcement connection mechanism is a stacked structure; and / or an angle is formed between an extension direction of the reinforcement connection mechanism and an extension direction of the locking beam.

[0027] In the present solution, the locking beam in the cantilever beam is connected to the side of the vehicle beam through a reinforcing connecting mechanism, and then a locking mechanism connected to the battery pack is arranged on the locking beam. This segmented connection method ensures the connection stability between the cantilever beam and the vehicle beam. When the battery pack approaches the vehicle beam along the width direction of the electric vehicle, it can be directly connected to the locking mechanism on the locking beam, thereby ensuring the stability of the battery pack installation; further, the reinforcing connecting mechanism is a stacked structure, so as to further improve the stability of the locking beam relative to the vehicle beam by utilizing the stacked connection and fixing method; further, the extension direction of the reinforcing connecting mechanism itself has an angle with the extension direction of the locking beam, so as to increase the connection area between the reinforcing connecting mechanism and the vehicle beam in a direction non-parallel to the locking beam, thereby further ensuring the connection stability between the reinforcing connecting mechanism and the vehicle beam.

[0028] Further, along the width direction of the electric vehicle, two ends of the reinforcement connection mechanism are respectively connected to the vehicle beam and the locking beam;

[0029] And / or, the reinforcement connection mechanism extends along the length direction of the electric vehicle, and the locking beam extends along the width direction of the electric vehicle;

[0030] And / or, the reinforcement connection mechanism comprises a support portion and a reinforcement portion which are stacked, and the locking beam is connected to at least one side of the vehicle beam through the support portion and the reinforcement portion which are stacked;

[0031] Preferably, the support portion and the reinforcement portion are stacked in a width direction of the electric vehicle.

[0032] In this solution, the reinforced connection mechanism is respectively connected to the vehicle beam and the locking beam at both ends in the width direction of the electric vehicle, and the reinforced connection mechanism is used as an intermediate connection transition piece, so that in the width direction of the electric vehicle, the vehicle beam and the locking beam can be doubly connected and fixed, so as to further improve the connection stability between the vehicle beam and the locking beam; further, the extension directions of the reinforced connection mechanism and the locking beam extend along the length direction and width direction of the electric vehicle respectively, so that the reinforced connection mechanism can be directly fixed on the vehicle beam, and the connection and fixing area of ​​the two can be increased. At the same time, when the battery pack is close to and installed on the vehicle beam along the width direction of the electric vehicle, it can be directly connected with the locking mechanism on the locking beam. The structure is connected, and the overall structure is more reasonable; further, the reinforced connection mechanism is arranged as a stacked support portion and a reinforcement portion to improve the torsion resistance and structural strength of the reinforced connection mechanism, improve the stability of the connection between the locking beam and the vehicle beam and the service life of the entire quick-change bracket, and the support portion and the reinforcement portion are designed as two independent structures, while ensuring the structural strength, reducing the processing difficulty of a single component, and facilitating processing and assembly; further, the support portion and the reinforcement portion of the reinforced connection mechanism are stacked along the width direction of the electric vehicle to increase the thickness of the reinforced connection mechanism in the width direction of the electric vehicle, and further increase the torsion resistance and structural strength of the reinforced connection mechanism.

[0033] Further, the locking beam is a hollow structure, and the locking mechanism is arranged on the locking beam;

[0034] Preferably, the locking beam is provided with at least one inspection opening on one end surface facing the outside of the quick-change bracket in the length direction of the electric vehicle;

[0035] And / or, the locking beam is provided with at least one weight-reducing hole on one end surface facing the inside of the quick-change bracket in the length direction of the electric vehicle;

[0036] Wherein, the inspection port and the weight-reducing hole are respectively arranged on two opposite end surfaces of the locking beam along the length direction of the electric vehicle.

[0037] In the present solution, the locking mechanism is arranged on the locking beam located on the side of the vehicle to minimize the space occupied by the locking mechanism in the length direction of the electric vehicle, so as to reserve more space for the installation of the battery pack, thereby increasing the volume of the battery pack adapted to the electric vehicle and improving the power of the battery pack; further, by providing at least one inspection port on one end face of the locking beam, it is helpful for technicians to maintain the locking mechanism and other components arranged inside the locking beam, and facilitate subsequent maintenance; further, by providing at least one weight-reducing hole on one end face of the locking beam, it helps to reduce the structural weight of the locking beam itself, and at the same time save costs; at the same time, in the length direction of the electric vehicle, inspection ports and weight-reducing holes are respectively provided on the two opposite end faces of the locking beam, so that the overall structure of the locking beam is more balanced, avoiding uneven force when the battery pack is locked on the locking beam.

[0038] Further, the inspection port communicates with the interior and exterior of the locking beam, and the inspection port is arranged corresponding to the locking mechanism;

[0039] And / or, at least one end surface of the locking beam opposite to each other along the length direction of the electric vehicle is detachably connected to at least one sealing plate, and the sealing plate is used to connect to the inspection port or the weight-reducing hole.

[0040] In the present solution, the inspection port is connected to the inside and outside of the locking beam, which is more helpful for maintenance personnel to repair the locking mechanism and other components inside the locking beam from the outside, and the inspection port is set corresponding to the locking mechanism, which further facilitates maintenance personnel to repair the locking mechanism; further, a sealing plate is set on the inspection port or the weight-reducing hole to protect the locking beam under normal circumstances, so as to prevent the components inside the locking beam from being interfered with by external components under normal circumstances, affecting their normal use.

[0041] Furthermore, the quick-change bracket further comprises a connecting piece, the connecting piece is fixed to an end surface of the reinforcing connecting mechanism in the width direction of the electric vehicle, the locking beam is sleeved on the connecting piece and connected to the reinforcing connecting mechanism;

[0042] And / or, the quick-change bracket further includes a first reinforcement member, the first reinforcement member is arranged outside the locking beam, the first reinforcement member is respectively connected to the reinforcement connection mechanism and the locking beam, and is used to reinforce the connection between the reinforcement connection mechanism and the locking beam;

[0043] And / or, the quick-change bracket also includes an avoidance piece, which is connected to the reinforcement connection mechanism. Along the width direction of the electric vehicle, the avoidance piece protrudes from the end connected to the reinforcement connection mechanism in the direction close to the locking beam, and the end of the avoidance piece away from the locking beam forms a hollow avoidance space.

[0044] In the present solution, since the locking beam and the reinforcement connection mechanism have different extension directions, in the extension direction of the locking beam, by arranging a connecting piece on one end face of the end face of the reinforcement connection mechanism, the locking beam is indirectly connected to the reinforcement connection mechanism through the connecting piece, so as to increase the connection area between the two, reduce the connection difficulty, and at the same time increase the connection stability; further, the first reinforcement member is respectively connected to the reinforcement connection mechanism and the locking beam, so as to further strengthen the connection stability between the two and improve the structural strength; further, by connecting an avoidance member to the reinforcement connection mechanism, the raised side of the avoidance member is tightly connected to the locking beam, and at the same time, the side of the avoidance member with an avoidance space avoids other components on the electric vehicle, so as to further improve the connection strength and application scope of the reinforcement connection mechanism.

[0045] Further, the cantilever beam includes two locking beams symmetrically arranged relative to the vehicle beam, the two locking beams are respectively arranged on both sides of the vehicle beam, and each locking beam corresponds to one reinforcement connection mechanism, and the locking beam is connected to the vehicle beam through the reinforcement connection mechanism on the same side;

[0046] Preferably, the cantilever beam also includes a center beam, and the two locking beams are respectively arranged on both sides of the center beam in the width direction of the electric vehicle, and the two ends of the center beam in the width direction of the electric vehicle are respectively connected to the reinforcement connection mechanism on the corresponding side.

[0047] In this solution, locking beams are symmetrically arranged on both sides of the vehicle beam, and each locking beam corresponds to a reinforcement connection mechanism, and is connected to the vehicle beam through the corresponding reinforcement connection mechanism. The locking beams on both sides of the vehicle beam can be used to lock the battery pack, so that the structure of the electric vehicle at the vehicle beam position is more symmetrical, and the number of battery packs can be increased, thereby increasing the capacity; further, the two locking beams are respectively arranged on both sides of the center beam in the width direction of the electric vehicle, so that the two locking beams and the center beam together form a complete cantilever beam, further ensuring the positional relationship between the two locking beams in each cantilever beam, and the stability of the connection with the vehicle beam.

[0048] Furthermore, the quick-change bracket also includes a second reinforcement member, which is arranged outside the center beam and is respectively connected to the reinforcement connection mechanism and the center beam to reinforce the connection between the reinforcement connection mechanism and the center beam.

[0049] In this solution, a second reinforcement member is used to connect to the reinforced connection mechanism and the center beam respectively, so as to further strengthen the connection stability between the two, and further improve the structural strength of the cantilever beam and the connection stability between the cantilever beam and the vehicle beam.

[0050] Further, the quick-change bracket further comprises a locking determination mechanism, the locking determination mechanism extends from a side of the cantilever beam, and the locking determination mechanism is used to determine whether the battery pack is locked on the quick-change bracket;

[0051] Preferably, the cantilever beam is extended along the width direction of the electric vehicle, and the lock determination mechanism is arranged on an end surface of the cantilever beam along the length direction of the electric vehicle.

[0052] In the present solution, a locking determination mechanism is provided on the quick-change bracket and is used to detect and determine whether the battery pack is successfully locked on the quick-change bracket, thereby avoiding ending the battery replacement process when the quick-change bracket and the battery pack are not locked, thereby improving the reliability and safety of the battery replacement operation; further, when the cantilever beam extends along the width direction of the electric vehicle, it has a larger installation space on the end face along the length direction of the electric vehicle. When the locking determination mechanism is provided on the end face, it also has sufficient space to move to complete the detection, and the structure is more reasonable.

[0053] Further, the locking mechanism includes a lock base and a locking linkage, the lock base is fixed on the cantilever beam, and the locking linkage is rotatably connected to the lock base to lock or unlock the battery pack;

[0054] The locking determination mechanism includes a moving part and a fixed part, the moving part is connected to the locking linkage part and moves synchronously with the locking linkage part, the fixed part is fixed on the cantilever beam, and the locking determination mechanism determines whether the battery pack is locked on the quick-change bracket by detecting the relative position between the moving part and the fixed part.

[0055] In the present scheme, the locking linkage rotates relative to the lock base (i.e., relative to the cantilever beam) to achieve locking and unlocking of the battery pack, and the movable part moves synchronously with the locking linkage, thereby changing the relative position between the movable part and the fixed part. Therefore, by judging the relative position of the movable part and the fixed part, it is determined whether the locking linkage is rotated into place, and then whether the battery pack is locked on the quick-change bracket. Since the movable part is fixed on the locking linkage to achieve synchronous movement with the locking linkage, there will be no delay or misalignment in the movement of the movable part, thereby improving the detection accuracy and improving the reliability and safety of the battery replacement operation.

[0056] Further, when the distance between the moving part and the fixed part is within a preset distance range, the battery pack can be locked on the quick-change bracket;

[0057] And / or, the cantilever beam is a hollow structure, and the moving member extends out from an opening formed on a side surface of the cantilever beam;

[0058] And / or, the fixing member is fixedly arranged on the side of the cantilever beam from which the moving member extends;

[0059] And / or, the locking mechanism includes a primary locking mechanism and a secondary locking mechanism, the moving member includes a first moving member and a second moving member, the first moving member is connected to the locking linkage member of the primary locking mechanism, the second moving member is connected to the locking linkage member of the secondary locking mechanism, and the first moving member and the second moving member cooperate with the same fixed member;

[0060] And / or, the cantilever beam is a hollow structure, and a first sensor is further provided in the cantilever beam for detecting the position of the locking linkage to determine whether the battery pack is locked on the quick-change bracket.

[0061] In the present solution, a preset distance is set in advance, and by comparing the distance between the moving part and the fixed part with the preset range, it is determined whether the battery pack is locked on the quick-change bracket, which makes the operation more convenient and quicker; further, the moving part extends out from an opening opened on one side of the cantilever beam, which makes it more convenient for the moving part to move following the locking linkage part, thereby avoiding interference of other components with the movement of the moving part; further, the fixed part is also arranged on the side of the cantilever beam where the moving part is arranged, so that the fixed part and the moving part are on the same side of the cantilever beam, which makes it easier to detect the relative position between the two; further, by sharing a fixed part for the first moving part and the second moving part, the structure of the locking determination mechanism can be simplified, thereby reducing the cost; further, by arranging a first sensor in the cantilever beam, the first sensor is used to send a locking or unlocking signal to the electric vehicle to detect whether the battery pack is locked on the quick-change bracket, thereby further improving the reliability and safety of the battery pack locking.

[0062] An electric vehicle is characterized in that the electric vehicle comprises the quick-change bracket as described above.

[0063] In this solution, the quick-change bracket is fixed on the electric vehicle to install the battery pack at the vehicle beam position of the electric vehicle, and the battery pack is used to power the electric vehicle.

[0064] The positive and progressive effects of the utility model are:

[0065] By arranging a front cantilever beam and a rear cantilever beam on the beam of the electric vehicle at intervals along the length direction of the electric vehicle, and connecting the front cantilever beam and the rear cantilever beam with a fixing mechanism, an integral quick-change bracket is formed, and the locking mechanism is arranged on the front cantilever beam and the rear cantilever beam. When the battery pack moves toward the beam along the width direction of the electric vehicle, the locking member on the battery pack can be locked with the locking mechanism on the front cantilever beam and the rear cantilever beam to fix the battery pack relative to the quick-change bracket and avoid interference between the battery pack and components such as the transmission shaft in the middle of the beam. At the same time, the integral quick-change bracket can avoid changes in the relative positions of the front and rear cantilever beams, facilitate battery replacement, and also reduce the installation accuracy requirements of the battery pack and the quick-change bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is a schematic diagram of the overall structure of an electric vehicle at the position of the vehicle beam in one embodiment of the utility model;

[0067] Figure 2 This is a schematic diagram of the assembly structure of the quick-change bracket and the vehicle beam in one embodiment of the utility model (I);

[0068] Figure 3 This is a schematic diagram of the assembly structure of the quick-change bracket and the vehicle beam in one embodiment of the utility model (II);

[0069] Figure 4 This is a schematic diagram of the overall external structure of a battery pack in one embodiment of the utility model;

[0070] Figure 5 This is a schematic diagram of the overall structure of a quick-change bracket in one embodiment of the utility model;

[0071] Figure 6 This is a schematic diagram of the overall structure of the fixing mechanism in one embodiment of the utility model;

[0072] Figure 6a This is a schematic diagram of the structure of the first stabilizing member in one embodiment of the utility model;

[0073] Figure 6b It is a structural schematic diagram of the fixing mechanism at the position of the second fixing member in one embodiment of the utility model;

[0074] Figure 6c This is a schematic structural diagram of a third stabilizing member in an embodiment of the utility model;

[0075] Figure 7 This is a schematic structural diagram of a connector bracket in an embodiment of the utility model;

[0076] Figure 8 This is a schematic diagram of the structure of an electrical connector in one embodiment of the utility model;

[0077] Fig. 9 This is a schematic diagram of the overall structure of the front cantilever beam in one embodiment of the utility model;

[0078] Fig.10 It is a structural schematic diagram of the front cantilever beam at the locking beam in one embodiment of the utility model;

[0079] Fig.11 It is a schematic diagram of the assembly structure of the central beam and the reinforcement part of the front cantilever beam in one embodiment of the utility model;

[0080] Fig.12 It is a schematic diagram of the assembly structure of the support portion and the avoidance member of the front cantilever beam in one embodiment of the utility model;

[0081] Fig.13 It is a schematic diagram of the assembly structure of the support part, the connecting part and the avoiding part of the front cantilever beam in one embodiment of the utility model;

[0082] Fig.14 This is a schematic diagram of the overall structure of the rear cantilever beam in one embodiment of the utility model;

[0083] Fig.15 It is a schematic diagram of the overall structure of the reinforcement connection mechanism of the rear cantilever beam in one embodiment of the utility model;

[0084] Fig.16 Another side view of the structure of the cooperation between the beam and the quick-change bracket in one embodiment of the utility model;

[0085] Fig.17 This is a schematic diagram of the overall structure of a locking beam in one embodiment of the utility model;

[0086] Fig.18 This is a schematic diagram of the internal structure of a locking beam in one embodiment of the utility model;

[0087] Fig.19 It is another schematic diagram of the internal structure of the locking beam in one embodiment of the utility model;

[0088] Fig. 20 This is a schematic diagram of the overall structure of the locking mechanism in one embodiment of the utility model;

[0089] Fig.21 The figure is a schematic diagram of the top structure of the locking mechanism in one embodiment of the utility model.

[0090] Description of reference numerals:

[0091] Quick-change bracket 1, front cantilever beam 11, rear cantilever beam 12, locking beam 111, center beam 112, positioning mark 113, sealing plate 1111, locking mechanism 13, fixing mechanism 14, connecting beam 141, connecting beam body 1412, reinforcing beam 142, base 1421, first stabilizing member 143, bearing plate 144, clamping portion 1441, clamping groove 1442, reversing member 145, first flat plate 1451, second flat plate 1452, second stabilizing member 146, first connecting surface 147, second connecting surface 148, hollow portion 14 81, bevel 1482, third stabilizing member 149, adjusting portion 1491, adjusting hole 1492, fitting portion 1493, reinforcing connecting mechanism 15, supporting portion 151, supporting portion body 1511, first bending portion 1512, reinforcing portion 152, reinforcing portion body 1521, second bending portion 1522, third bending portion 1523, second avoiding member 1524, connector frame 16, mounting port 161, electrical connector 162, first reinforcing member 171, second reinforcing member 172, first fastener 173, second fastener 17 4. Connecting member 181, top plate 1811, bottom plate 1812, first side plate 1813, second side plate 1814, avoidance member 182, avoidance space 1821, battery pack 2, locking member 21, battery pack housing 22, fixing frame 23, accommodating space 24, vehicle beam 3, lock base 31, locking channel 32, locking linkage member 33, locking tongue 34, primary locking mechanism 35, primary lock base 351, primary locking tongue 352, locking link 353, primary elastic member 354, primary elastic member fixing seat 355, secondary locking mechanism 36, A secondary lock base 361, a secondary lock tongue 362, a secondary lock rod 363, a secondary elastic member 364, a movable member 41, a first connecting portion 411, a first detecting portion 412, a first bending section 413, a second bending section 414, a third bending section 415, a first movable member 416, a second movable member 417, a fixed member 42, a fourth bending section 421, a fifth bending section 422, a second connecting portion 423, a second detecting portion 424, a sensor 5, a length direction L of the electric vehicle, a width direction W of the electric vehicle, and a height direction H of the electric vehicle. DETAILED DESCRIPTION

[0092] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0093] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0094] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0095] This embodiment provides an electric vehicle, such as Figure 1 , Figure 2 and Figure 3 As shown, the electric vehicle includes two beams 3 arranged in parallel with each other. The beam 3 is one of the main load-bearing structures of the electric vehicle. The extension direction of the beam 3 is the length direction L of the electric vehicle, that is, the driving direction of the electric vehicle. The two beams 3 are arranged on the same horizontal plane in the height direction H of the electric vehicle, and the two beams 3 are arranged at intervals in the width direction W of the electric vehicle. The area between the two beams 3 is provided with components such as a transmission shaft (not shown in the figure). At the same time, a quick-change bracket 1 is set above the two beams 3. In the width direction W of the electric vehicle, a battery pack 2 is fixed to the side of each beam 3. The battery pack 2 is fixed to the beam 3 through the quick-change bracket 1.

[0096] Specific, combined Figure 4As shown, the quick-change bracket 1 includes a cantilever beam, a locking mechanism 13 and a fixing mechanism 14. The cantilever beam includes a front cantilever beam 11 and a rear cantilever beam 12 arranged on two vehicle beams 3 at intervals along the length direction L of the electric vehicle. The fixing mechanism 14 is arranged between the front cantilever beam 11 and the rear cantilever beam 12, and the fixing mechanism 14 is connected to the front cantilever beam 11 and the rear cantilever beam 12 respectively. The locking mechanism 13 is arranged on the front cantilever beam 11 and the rear cantilever beam 12, and the locking mechanism 13 is used to be locked and connected with the locking member 21 on the battery pack 2. Through this structural setting, the fixing mechanism 14 between the front cantilever beam 11 and the rear cantilever beam 12 can be used to form an integral quick-change bracket 1, and the locking mechanism 13 can be set on the front cantilever beam 11 and the rear cantilever beam 12. When the battery pack 2 moves toward the vehicle beam 3 along the width direction W of the electric vehicle, the locking member 21 on the battery pack 2 can be used to lock with the locking mechanism 13 on the front cantilever beam 11 and the rear cantilever beam 12, so as to fix the battery pack 2 relative to the quick-change bracket 1 and avoid interference between the battery pack 2 and the transmission shaft and other components in the middle of the vehicle beam 3; at the same time, compared with the quick-change bracket 1 independently installed on both sides of the vehicle beam 3 of the electric vehicle, the integral quick-change bracket 1 can increase the installation stability between it and the vehicle beam 3, and when the vehicle beam 3 twists, the quick-change bracket 1 can still maintain the consistency of its overall structure, and finally meet the installation stability and consistency requirements of the battery pack 2.

[0097] like Figure 5 and Figure 6 As shown, the fixing mechanism 14 specifically includes a connecting portion and a reinforcing portion. As mentioned above, the connecting portion is composed of a connecting beam 141, and the reinforcing portion is composed of a reinforcing beam 142. The connecting beam 141 is connected between the front cantilever beam 11 and the rear cantilever beam 12, and is used to specifically define the relative position between the front cantilever beam 11 and the rear cantilever beam 12. The reinforcing beam 142 is connected between the connecting beam 141 and the vehicle beam 3, and is used to reinforce the frame structure formed by the connecting beam 141 and the front cantilever beam 11 and the rear cantilever beam 12. Among them, the connecting beam 141 extends along the length direction L of the electric vehicle, and the connecting beam 141 is connected to the front cantilever beam 11 and the rear cantilever beam 12 at both ends of the length direction L of the electric vehicle. The reinforcing beam 142 is connected between the connecting beam 141 and the vehicle beam 3 in a direction non-parallel to the connecting beam 141. In this embodiment, by connecting the connecting beam 141 between the front cantilever beam 11 and the rear cantilever beam 12, the position between the front cantilever beam 11 and the rear cantilever beam 12 can be limited in the simplest way. The setting of the reinforcing beam 142 makes the fixing mechanism 14 less likely to deform.

[0098] Furthermore, the connection portion composed of the connection beams 141 includes at least two connection beams 141, and the at least two connection beams 141 are arranged at intervals in the extension direction of the front cantilever beam 11 or the rear cantilever beam 12, and the two ends of any connection beam 141 are respectively connected to the front cantilever beam 11 and the rear cantilever beam 12. By arranging at least two connection beams 141 between the front cantilever beam 11 and the rear cantilever beam 12, the front cantilever beam 11 and the rear cantilever beam 12 are restrained at multiple locations in the extension direction, the possibility of relative displacement between the front cantilever beam 11 and the rear cantilever beam 12 is further reduced, and the overall structural strength of the quick-change bracket 1 can be improved.

[0099] Specifically, Figure 5 and Figure 6 As shown, at least two connecting beams 141 include two first connecting beams, which are respectively arranged on both sides of the vehicle beam 3, and the first connecting beams are connected to the edge positions in the extension direction of the front cantilever beam 11 and the rear cantilever beam 12. Thus, the connecting beam 141 and the front cantilever beam 11 and the rear cantilever beam 12 are connected to form a frame structure, which improves the structural stability of the quick-change bracket 1; further, the first connecting beam is connected to the edge positions in the extension direction of the front cantilever beam 11 and the rear cantilever beam 12, so that the installation position between the ends of the front cantilever beam 11 and the rear cantilever beam 12 is restricted by the first connecting beam, so as to avoid the installation position between the ends of the front cantilever beam 11 or the rear cantilever beam 12 being unable to be fixed due to torsion.

[0100] Furthermore, the reinforcement part composed of the reinforcement beam 142 includes at least one reinforcement beam 142, the extension direction of the reinforcement beam 142 and the extension direction of any connecting beam 141 have an angle, and at least one end of the reinforcement beam 142 is connected to a connecting beam 141. Therefore, the reinforcement beam 142 provides force support for the connecting beam 141 in a direction non-parallel to the connecting beam 141, further improving the overall strength of the fixing mechanism 14. Furthermore, the two ends of the reinforcement beam 142 are respectively connected to the middle position of the two connecting beams 141, so that the two ends of the reinforcement beam 142 are connected to a connecting beam 141 and play a supporting role for the two connecting beams 141, reducing the risk of the connecting beam 141 breaking and increasing the structural strength of the fixing mechanism 14. In other optional embodiments, the two ends of the reinforcement beam 142 can also be connected to other positions between the two connecting beams 141.

[0101] like Figure 6As shown, the fixing mechanism 14 includes at least one first stabilizing member 143, and the reinforcement beam 142 is connected to the vehicle beam 3 through the first stabilizing member 143. Further, when the number of the reinforcement beam 142 is one, the fixing mechanism 14 includes two first stabilizing members 143, and the reinforcement beam 142 is respectively connected to two vehicle beams 3 through the two first stabilizing members 143. The connection between the reinforcement beam 142 and the vehicle beam 3 is realized through the first stabilizing member 143, so that the quick-change bracket 1 can be connected to the vehicle beam 3 not only through the front cantilever beam 11 and the rear cantilever beam 12, but also through the connection with the vehicle beam 3 through the reinforcement beam 142, which increases the connection points between the quick-change bracket 1 and the vehicle beam 3, makes the connection between the quick-change bracket 1 and the vehicle beam 3 more firm, and improves the structural stability of the quick-change bracket 1 itself.

[0102] like Figure 2 , Figure 6 and Figure 6a As shown, the first stabilizing member 143 includes a bearing plate 144 and a reversing member 145, and the reversing member 145 includes a first flat plate 1451 and a second flat plate 1452 forming a corner; the bearing plate 144 is closely connected to a side of the first flat plate 1451 away from the corner, and the second flat plate 1452 is used to connect with the vehicle beam 3. A clamping portion 1441 is provided on a side of the bearing plate 144 away from the first flat plate 1451, and a clamping groove 1442 is provided on the clamping portion 1441, and the clamping groove 1442 is used to clamp the reinforcing beam 142. In this embodiment, by providing a clamping portion 1441 with a clamping groove 1442 on the bearing plate 144, the first stabilizing member 143 can be clamped with the reinforcing beam 142; since the clamping portion 1441 is located on the bearing plate 144, the bearing plate 144 is fitted with the first flat plate 1451, and the first flat plate 1451 has a corner with the second flat plate 1452, that is, the first flat plate 1451 and the second flat plate 1452 have different extension directions, and thus the bearing plate 144 and the second flat plate 1452 have different extension directions, thereby, the reinforcing beam 142 located on the bearing plate 144 can be conveniently connected to the vehicle beam 3 of the electric vehicle through the second flat plate 1452 in the reversing member 145.

[0103] like Figure 2 , Figure 6 and Figure 6b As shown, the fixing mechanism 14 also includes at least one second stabilizing member 146, and the reinforcing beam 142 is connected to the connecting beam 141 through the second stabilizing member 146; further, since the two connecting beams 141 are arranged on both sides of the vehicle beam 3 in this embodiment, the reinforcing beam 142 is connected to at least two connecting beams 141 arranged on both sides of the vehicle beam 3 through the second stabilizing member 146, so that the reinforcing beam 142 supports the connecting beams 141 on both sides of the vehicle beam 3.

[0104] The reinforcement beam 142 includes a base 1421, and a second stabilizing member 146 is fixedly connected to the end surface of the base 1421 facing the connecting beam 141; the second stabilizing member 146 includes a first connecting surface 147 facing the connecting beam 141, and the area of ​​the first connecting surface 147 is larger than the surface area of ​​the end surface of the base 1421 facing the connecting beam 141; the reinforcement beam 142 is connected to the connecting beam 141 through the first connecting surface 147. Since the area of ​​the first connecting surface 147 in the second stabilizing member 146 is larger than the surface area of ​​the end surface of the base 1421, compared with the end surface of the base 1421 of the reinforcement beam 142 being directly connected to the connecting beam 141, the connection area between the reinforcement beam 142 and the connecting beam 141 is increased by connecting the first connecting surface 147 in the second stabilizing member 146 to the connecting beam 141, so that the connection between the reinforcement beam 142 and the connecting beam 141 is more firm and stable and not easy to break.

[0105] Furthermore, the second stabilizing member 146 further includes a second connecting surface 148 vertically arranged with the first connecting surface 147; the end surface of the base 1421 facing one end of the connecting beam 141 is connected with the first connecting surface 147, and the side wall of the base 1421 is connected with the second connecting surface 148; and a hollow portion 1481 is provided on the second connecting surface 148. In this embodiment, by providing the base 1421 to be connected with the first connecting surface 147 and the second connecting surface 148 of the second stabilizing member 146 respectively, the connection between the second stabilizing member 146 and the base 1421 is made more secure. The hollow portion 1481 is provided on the second connecting surface 148, and the self-weight of the second stabilizing member 146 is reduced as much as possible on the basis of ensuring the secure connection between the second stabilizing member 146 and the base 1421, thereby reducing the weight of the entire quick-change bracket 1.

[0106] Further, the second connection surface 148 includes at least one hypotenuse 1482, one end of the hypotenuse 1482 is connected to the end of the first connection surface 147, the other end of the hypotenuse 1482 is connected to the base 1421, and the position where the hypotenuse 1482 is connected to the base 1421 is spaced a predetermined distance from one end of the base 1421 facing the connection beam 141. In this embodiment, by connecting one end of the hypotenuse 1482 of the second connection surface 148 to the first connection surface 147 and the other end to the base 1421, a triangular structure is formed between the base 1421, the first connection surface 147, and the hypotenuse 1482, thereby enhancing the structural stability of the second stabilizing member 146; further, when the second connection surface 148 is provided with a hypotenuse 1482 on both sides of the base 1421, the second connection surface 148 will form a trapezoidal structure, the force is more balanced, and the structural stability of the second stabilizing member 146 is better.

[0107] like Figure 2 , Figure 6 and Figure 6cAs shown, the fixing mechanism 14 further includes at least one third stabilizing member 149, and the connecting beam 141 includes a connecting beam body 1412; the third stabilizing member 149 includes an adjusting portion 1491, and the connecting beam body 1412 is slidably sleeved in the adjusting portion 1491 along the length direction of the connecting beam 141; the adjusting portion 1491 and the connecting beam body 1412 are each provided with a group of adjusting holes 1492 extending along the length direction of the connecting beam 141, and the adjusting holes 1492 on the adjusting portion 1491 and the adjusting holes 1492 on the connecting beam body 1412 are connected by bolts 613. Thus, the length of the connecting beam 141 can be adjusted by changing the position of the connecting beam body 1412 in the adjusting portion 1491 and installing the bolts 613 in the corresponding adjusting holes 1492 on the adjusting portion 1491 and the connecting beam body 1412, and the structure is simple and easy to operate.

[0108] Further, the connecting beam 141 is connected to the front cantilever beam 11 or the rear cantilever beam 12 through the third stabilizing member 149; the third stabilizing member 149 also includes a fitting portion 1493, the fitting portion 1493 is connected to the side of the adjusting portion 1491 away from the connecting beam body 1412; the fitting portion 1493 includes two fitting plates forming an angle, and the two fitting plates are used to connect with two adjacent side walls of the front cantilever beam 11 or the rear cantilever beam 12. Therefore, the third stabilizing member 149 can not only cooperate with the connecting beam body 1412 to adjust the length of the connecting beam 141, but also connect the connecting beam 141 with the front cantilever beam 11 or the rear cantilever beam 12. Further, because the fitting portion 1493 includes two fitting plates forming an angle, the connecting beam 141 can be connected to the two side walls of the front cantilever beam 11 or the rear cantilever beam 12, thereby increasing the connection area and making the connection between the connecting beam 141 and the front cantilever beam 11 or the rear cantilever beam 12 more firmly.

[0109] like Figures 1 to 4As shown, the front cantilever beam 11 and the rear cantilever beam 12 are mounted on the two beams 3 along the width direction W of the electric vehicle, and are arranged at intervals along the length direction L of the electric vehicle. The locking mechanism 13 located on the front cantilever beam 11 and the rear cantilever beam 12 is arranged on the front cantilever beam 11 and the rear cantilever beam 12 along the width direction W of the electric vehicle, so as to lock or unlock the battery pack 2 arranged on the side of the beam 3 along the width direction W of the electric vehicle. Specifically, the front cantilever beam 11 and the rear cantilever beam 12 are parallel to each other and are mounted on the beam 3 at intervals, and the front cantilever beam 11 and the rear cantilever beam 12 both extend along the width direction W of the electric vehicle. The locking mechanism 13 is respectively arranged at the lower ends of the front cantilever beam 11 and the rear cantilever beam 12, so as to facilitate the installation or removal of the battery pack 2 from the bottom of the electric vehicle. The quick-change bracket 1 provided in the present embodiment reduces the space occupied by the quick-change bracket 1 in the length direction L of the electric vehicle by arranging the locking mechanism 13 on the front cantilever beam 11 and the rear cantilever beam 12, and locking or unlocking the locking mechanism 13 along the width direction W of the electric vehicle, and can reserve sufficient lateral space to facilitate lateral battery replacement of the electric vehicle, thereby improving the battery replacement efficiency of lateral battery replacement; in addition, locking or unlocking the locking mechanism 13 along the width direction W of the electric vehicle can avoid occupying the path for the battery replacement equipment to take and place the battery pack 2, thereby further improving the battery replacement efficiency of lateral battery replacement; in addition, the path for taking and placing the battery pack 2 is consistent with the locking path, that is, both are in the width direction W of the electric vehicle, which is conducive to improving the battery replacement efficiency of lateral battery replacement.

[0110] In other optional embodiments, the number of beams 3 can be adjusted accordingly according to the type and specific structure of the vehicle, and the number of locking mechanisms 13 can also be adjusted accordingly according to the specific layout structure of the quick-change bracket 1 in the vehicle and the number of mounted battery packs 2.

[0111] Furthermore, if Figure 1-Figure 3As shown, along the width direction W of the electric vehicle, at least the ends of the front cantilever beam 11 and the rear cantilever beam 12 on the same side extend out of the vehicle beam 3, and the locking mechanism 13 is arranged on the ends of the front cantilever beam 11 and the rear cantilever beam 12 extending out of the vehicle beam 3. It should be noted that the relative position between the two vehicle beams 3 represents the "inside" of the vehicle beam 3, and the position of one of the vehicle beams 3 away from the other vehicle beam 3 represents the "outside" of the vehicle beam 3. The middle part of the front cantilever beam 11 or the rear cantilever beam 12 is mounted on the vehicle beam 3 and is located at the "inside position" between the two vehicle beams 3, and the two ends of the front cantilever beam 11 or the rear cantilever beam 12 are located at the "outside position" of the two vehicle beams 3. "The ends on the same side" refers to the ends located on the same side of the two vehicle beams 3. In this embodiment, the locking mechanism 13 is arranged on the ends on both sides of the two vehicle beams 3. The quick-change bracket 1 provided in this embodiment is provided with a locking mechanism 13 at the ends of the front cantilever beam 11 and the rear cantilever beam 12 extending out of the vehicle beam 3, so as to adapt the battery pack 2 to enter the quick-change bracket 1 from the side of the vehicle beam 3 and be locked with the locking mechanism 13. In addition, the locking mechanism 13 is installed on the cantilever beams at the front and rear ends of the quick-change bracket 1, so that the forces at the front and rear ends of the quick-change bracket 1 are balanced, which is conducive to improving the stability of the quick-change bracket 1 in carrying the battery pack 2.

[0112] Combination Figure 7 and Figure 8 As shown, the quick-change bracket 1 is also provided with a connector frame 16 and an electric connector 162. The connector frame 16 is provided below the beam 3 along the height direction H of the electric vehicle, wherein the connector frame 16 is provided with a mounting port 161, and the electric connector 162 is fixedly mounted on the connector frame 16, and the plug interface of the electric connector 162 is exposed through the mounting port 161. The electric connector 162 is electrically connected to the battery pack 2 through its plug interface to achieve power transmission. This arrangement allows the electric connector 162 to be located below the beam 3 and electrically connected to the battery pack 2 below the beam 3, so as to make full use of the space below the beam 3, while minimizing the longitudinal height of the battery pack 2 to avoid interference between the battery pack 2 and components on the upper part of the vehicle.

[0113] Specifically, the structure of the battery pack 2 is as follows Figure 4As shown, the battery pack 2 mainly includes a plurality of battery cells (not shown in the figure) and a battery pack shell 22. The plurality of battery cells are connected to each other inside the battery pack shell 22. The overall structure of the battery pack shell 22 is a double-layer cubic structure, wherein the edge size of the upper structure is slightly smaller than the edge size of the lower structure, so that the upper structure and the lower structure form a surrounding step at the edge, and a locking member 21 is provided at the relative position of the surrounding step. In addition, the battery pack shell 22 is also connected to a fixed frame 23 on one side thereof, the fixed frame 23 protrudes from the side, and the interior of the fixed frame 23 is a hollow structure, that is, the interior of the fixed frame 23 has a receiving space 24, and the receiving space 24 is used to receive a battery terminal connector (not shown in the figure), and the plug connector of the battery terminal connector is exposed through the hollow area on the fixed frame 23. After the plurality of battery cells are connected to each other inside the battery pack shell 22, they are uniformly connected to the battery terminal connector, and the battery terminal connector is used to uniformly transmit the electric energy of the plurality of battery cells to the outside. When the side surface of the fixed frame 23 of the battery pack 2 gradually approaches the vehicle beam 3 along the width direction W of the electric vehicle, the connector of the battery pack 2 can be plugged into the electrical connector 162 on the quick-change bracket 1, thereby realizing power transmission.

[0114] like Fig. 9 and Fig.10 As shown, in the width direction W of the electric vehicle, positioning marks 113 are provided on the sides of the front cantilever beam 11 and the rear cantilever beam 12. The positioning marks 113 are used to identify the position of the vehicle body in various directions. When the electric vehicle needs to replace the battery pack 2, it helps the battery replacement equipment to identify the position where the battery pack 2 is to be installed, and achieves accurate positioning and accurate installation of the battery pack 2. It should be noted that the positioning mark 113 can adopt components with sensing functions existing in the prior art, so that it can sense the direction and provide feedback signals to the operator. At the same time, in this embodiment, positioning marks 113 are provided on the sides of both ends of the front cantilever beam 11 and the rear cantilever beam 12 to maximize the role of the positioning mark 113 on the electric vehicle, but in other embodiments, it can also be adjusted as needed, for example, the positioning mark 113 is only provided on the side of one end.

[0115] like Figure 2 , Figure 5 , Fig. 9 and Fig.10As shown, the front cantilever beam 11 and the rear cantilever beam 12 are composed of sections, and the front cantilever beam 11 and the rear cantilever beam 12 both include a locking beam 111 arranged on at least one side of the vehicle beam 3, that is, the locking beam 111 is located at the end of the front cantilever beam 11 and the rear cantilever beam 12, and the locking beam 111 is used to place the locking mechanism 13, and is connected to the battery pack 2 through the locking mechanism 13. In the structure of the quick-change bracket 1, by arranging the locking mechanism 13 on the side of the vehicle beam 3, it is convenient to lock or unlock the battery pack 2 on the side of the vehicle beam 3, thereby facilitating the lateral battery replacement of the electric vehicle and improving the battery replacement efficiency of the lateral battery replacement. In this embodiment, each cantilever beam includes two locking beams 111, and the two locking beams 111 are symmetrically arranged relative to the vehicle beam 3, and each locking beam 111 is connected to the corresponding vehicle beam 3 along the width direction W of the electric vehicle close to the vehicle beam 3.

[0116] Furthermore, the locking beam 111 is connected to the side of the vehicle beam 3 through the reinforcement connection mechanism 15, and the reinforcement connection mechanism 15 includes a stacked support portion 151 and a reinforcement portion 152, that is, the locking beam 111 is connected to at least one side of the vehicle beam 3 through the stacked support portion 151 and the reinforcement portion 152, and then the connection between the locking beam 111 and the vehicle beam 3 is realized through the reinforcement connection mechanism 15, thereby increasing the connection area between the reinforcement connection mechanism 15 and the vehicle beam 3, and the reinforcement connection mechanism 15 also increases the connection area between the reinforcement connection mechanism 15 and the locking beam 111, thereby ensuring the connection strength between the quick-change bracket 1 and the vehicle beam 3 while improving the structural strength of the quick-change bracket 1 itself.

[0117] In this embodiment, the locking beam 111 extends along the width direction W of the electric vehicle, and an angle is formed between the extension direction of the reinforcing connection mechanism 15 and the extension direction of the locking beam 111. Specifically, the reinforcing connection mechanism 15 extends along the length direction L of the electric vehicle, and the extension direction of the reinforcing connection mechanism 15 is perpendicular to the extension direction of the locking beam 111, which facilitates the connection between the locking beam 111 and the reinforcing connection mechanism 15, and can increase the connection area between the two and improve the connection strength between the two.

[0118] like Figure 5 and Fig. 9 As shown, along the width direction W of the electric vehicle, the two ends of the reinforcement connection mechanism 15 are respectively connected to the vehicle beam 3 and the locking beam 111. Specifically, the vehicle beam 3 and the locking beam 111 are respectively connected to the two ends of the reinforcement connection mechanism 15 in the width direction W of the electric vehicle to prevent the vehicle beam 3 and the locking beam 111 from interfering with each other, ensure that both have enough space to connect with the reinforcement connection mechanism 15, and ensure the structural strength of the quick-change bracket 1 itself and the connection strength between the quick-change bracket 1 and the vehicle beam 3. In other alternative embodiments, the vehicle beam 3 and the locking beam 111 can also be connected to the same end of the reinforcement connection mechanism 15.

[0119] Furthermore, if Figure 5 and Fig. 9 As shown, the reinforcement connection mechanism 15 includes a support portion 151 and a reinforcement portion 152 that are stacked, and the support portion 151 and the reinforcement portion 152 both extend along the length direction L of the electric vehicle to increase the connection area between the reinforcement connection mechanism 15 and the vehicle beam 3, and ensure the connection strength between the two. The support portion 151 and the reinforcement portion 152 extend in the same direction to further increase the connection area between the two and ensure the connection strength between the two. In addition, the support portion 151 and the reinforcement portion 152 are stacked along the width direction W of the electric vehicle to improve the torsion resistance and structural strength of the quick-change bracket 1, and to increase the service life of the quick-change bracket 1.

[0120] In other alternative embodiments, the reinforcement connection mechanism 15 may not completely extend along the length direction L of the electric vehicle, and the extension direction of the reinforcement connection mechanism 15 and the length direction L of the electric vehicle may have a certain angle. In this embodiment, the reinforcement connection mechanism 15 is designed to extend along the length direction L of the electric vehicle because the vehicle beam 3 also extends along the length direction L of the electric vehicle. Therefore, the extension of the reinforcement connection mechanism 15 along the length direction L of the electric vehicle can increase the connection area between the reinforcement connection mechanism 15 and the vehicle beam 3, and improve the connection strength between the two.

[0121] In other alternative embodiments, the reinforcement connection mechanism 15 may not be a stacked structure, but may adopt an integrated structure. The present embodiment adopts a stacked structure, that is, the reinforcement connection mechanism 15 is designed to be formed by splicing together a plurality of independent structures. While ensuring the structural strength, it can reduce the processing difficulty of a single structure, making it easy to process and assemble.

[0122] In other alternative embodiments, the support portion 151 and the reinforcement portion 152 may not completely extend along the length direction L of the electric vehicle, and the extension direction of the support portion 151 and the reinforcement portion 152 may have a certain angle with the length direction L of the electric vehicle. The extension directions of the support portion 151 and the reinforcement portion 152 may be completely the same or may not be completely the same, that is, the extension directions of the two have a certain angle.

[0123] In other alternative embodiments, the support portion 151 and the reinforcement portion 152 may not be completely stacked along the width direction W of the electric vehicle, and the stacking direction of the two may have a certain angle with the width direction W of the electric vehicle. Fig. 9 , Fig.11 , Fig.12 and Fig.13As shown, the support portion 151 is stacked on the reinforcement portion 152, and the upper portion of the support portion 151 is fitted and connected to the upper portion of the reinforcement portion 152. The side portion of the reinforcement portion 152 extends downward along the height direction H of the electric vehicle and is connected to the upper end surface of the beam 3. The side portion of the support portion 151 extends downward along the height direction H of the electric vehicle and is fitted and connected to the side portion of the reinforcement portion 152 and the side surface of the beam 3 in the height direction H of the electric vehicle.

[0124] like Figure 5 In the reinforcement connection mechanism 15 shown, the support portion 151 is stacked on the reinforcement portion 152. Specifically, the upper portion of the support portion 151 is connected to the upper portion of the reinforcement portion 152. The side portion of the reinforcement portion 152 extends downward along the height direction H of the electric vehicle and is connected to the upper end surface of the beam 3. The side portion of the support portion 151 extends downward along the height direction H of the electric vehicle and is connected to the side portion of the reinforcement portion 152 and the side of the beam 3 in sequence.

[0125] Or, if Fig.14 In the reinforcement connection mechanism 15 shown, the side of the reinforcement part 152 extends downward along the height direction H of the electric vehicle and is connected to the upper end surface of the vehicle beam 3. The side of the support part 151 extends downward along the height direction of the electric vehicle and is fitted and connected with the side of the reinforcement part 152 and the side of the vehicle beam 3 in sequence.

[0126] In this embodiment, Figure 5 The example is a reinforcement connection mechanism 15 of the front end of an electric vehicle, in which the upper portion of the support portion 151 is bent and extended to the upper portion of the reinforcement portion 152, and the upper portion of the support portion 151 is closely connected to the upper portion of the reinforcement portion 152. Fig.14 As an example, in the reinforcement connection mechanism 15 of the rear end of an electric vehicle, the upper portion of the support portion 151 is not bent and extended to the upper portion of the reinforcement portion 152 .

[0127] In other embodiments, according to specific application requirements, in the reinforced connection structure 15 at the rear end of the electric vehicle, the upper part of the support part 151 is not bent and extended to the upper part of the reinforcement part 152, and the upper part of the support part 151 is fit-connected to the upper part of the reinforcement part 152 to increase the connection area between the support part 151 and the reinforcement part 152, thereby enhancing the connection strength between the support part 151 and the reinforcement part 152.

[0128] like Fig. 9 and Fig.11As shown, the reinforcing part 152 is entirely arranged above the vehicle beam 3. The reinforcing part 152 in this embodiment is a U-shaped beam, and the reinforcing part 152 includes a reinforcing part body 1521, a second bending part 1522, and a third bending part 1523. The upper end of the reinforcing part body 1521 is bent in a direction away from the support part 151 to form the second bending part 1522, and the second bending part 1522 is connected to the support part 151. The lower end of the reinforcing part body 1521 extends downward along the height direction H of the electric vehicle and is bent in a direction away from the support part 151 to form the third bending part 1523, and the third bending part 1523 abuts against the upper end surface of the vehicle beam 3 to achieve the connection between the reinforcing part body 1521 and the vehicle beam 3, so that the vehicle beam 3 can provide support force for the reinforcing part 152, and improve the connection effect between the quick-change bracket 1 and the vehicle beam 3. The reinforcing portion main body 1521 refers to the side portion of the reinforcing portion 152 , the second bending portion 1522 refers to the upper portion of the reinforcing portion 152 , and the third bending portion 1523 refers to the lower portion of the reinforcing portion 152 .

[0129] like Fig. 9 and Fig.12 As shown, the support portion 151 includes a support portion body 1511 and a first bending portion 1512. The upper end of the support portion body 1511 is bent toward the direction of the reinforcement portion 152 to form the first bending portion 1512. The first bending portion 1512 covers the upper part of the second bending portion 1522 and is connected to the second bending portion 1522. The first bending portion 1512 and the second bending portion 1522 increase the connection area between the support portion 151 and the reinforcement portion 152, thereby improving the connection strength between the two. The lower end of the support portion body 1511 extends downward along the height direction H of the electric vehicle to exceed the reinforcement portion body 1521. The part of the support portion body 1511 that does not exceed the reinforcement portion body 1521 is fitted and connected to the reinforcement portion body 1521. The part of the support portion body 1511 that exceeds the reinforcement portion body 1521 is fitted and connected to the side of the vehicle beam 3, so as to avoid interference between the reinforcement portion 152 and the vehicle beam 3 when the support portion 151 is connected to the vehicle beam 3. The supporting portion main body 1511 refers to the side portion of the supporting portion 151 , and the first bending portion 1512 refers to the upper portion of the supporting portion 151 .

[0130] Among them, the specific structure of the locking beam 111 of the rear cantilever beam 12 is basically the same as the specific structure of the locking beam 111 in the above-mentioned front cantilever beam 11, and the difference is that the locking beam 111 of the rear cantilever beam 12 is not provided with the avoidance member 182 in the above-mentioned cantilever beam.

[0131] Furthermore, if Fig.14 , Fig.15 and Fig.16As shown, the lower end of the locking beam 111 of the rear cantilever beam 12 is flush with the lower end of the locking beam 111 of the front cantilever beam 11, so as to ensure that after the battery pack 2 is fixed to the electric vehicle through the locking beam 111, the battery pack 2 can maintain a horizontal state, so as to ensure that the battery pack can stably supply power to the electric vehicle.

[0132] Among them, the specific structure of the reinforcement connection mechanism 15 of the rear cantilever beam 12 is basically the same as the specific structure of the reinforcement connection mechanism 15 of the cantilever beam in the above-mentioned embodiment, and the difference is that: the support part 151 in the reinforcement connection mechanism 15 of the rear cantilever beam 12 is a flat plate structure, which does not include the first bent portion 1522 in the support part 151 of the above-mentioned cantilever beam, and the support part 151 is only connected to the reinforcement part 152 in the reinforcement connection mechanism 15 of the rear cantilever beam 12 through the side surface in the width direction W of the electric vehicle, that is, the second bent portion 1522 of the reinforced portion 152 of the rear cantilever beam 12 is no longer covered by the first bent portion 1522 of the support part 151.

[0133] Furthermore, a second avoidance member 1524 is provided on the support portion 151 of the rear cantilever beam 12, and the second avoidance member 1524 is passed through at both ends in the width direction W of the electric vehicle to avoid other components on the electric vehicle. The second avoidance member 1524 in this embodiment is formed by being recessed toward the front cantilever beam 11 from one end face of the support portion 151 of the rear cantilever beam 12 away from the front cantilever beam 11 in the length direction L of the electric vehicle. In other alternative embodiments, the specific position of the second avoidance member 1524 can be designed according to the actual situation, and the second avoidance member 1524 can be omitted when there is no need to avoid.

[0134] Furthermore, the other structures of the electric vehicle that the front cantilever beam 11 and the rear cantilever beam 12 need to avoid are different. Fig.16 As shown, in this embodiment, the height of the front cantilever beam 11 in the height direction H of the electric vehicle is higher than the height of the rear cantilever beam 12 in the height direction H of the electric vehicle. Specifically, the height of the reinforcement portion 152 of the front cantilever beam 11 in the height direction H of the electric vehicle is greater than the height of the reinforcement portion 152 of the rear cantilever beam 12 in the height direction H of the electric vehicle, thereby making the height of the center beam 112 of the front cantilever beam 11 in the height direction H of the electric vehicle greater than the height of the center beam 112 of the rear cantilever beam 12 in the height direction H of the electric vehicle.

[0135] Furthermore, since the height of the front cantilever beam 11 in the height direction H of the electric vehicle is greater than the height of the rear cantilever beam 12 in the height direction H of the electric vehicle, the area of ​​the side surface of the front cantilever beam 11 in the width direction W of the electric vehicle is increased, thereby increasing the area that can be used for connection with the locking beam 111. Fig.16As shown, the height of the locking beam 111 of the front cantilever beam 11 in the height direction H of the electric vehicle is greater than the height of the locking beam 111 of the rear cantilever beam 12 in the height direction H of the electric vehicle, so that the connection area between the locking beam 111 of the front cantilever beam 11 and the reinforcement connection mechanism 15 of the front cantilever beam 11 is increased, thereby increasing the connection strength between the two.

[0136] In this embodiment, by increasing the height of the reinforcement connection mechanism 15 of the front cantilever beam 11, on the one hand, it is ensured that the upper area of ​​the reinforcement portion 152 of the front cantilever beam 11 has enough space to be connected to the center beam 112, and the height of the front cantilever beam 11 can be raised, so that there is enough space between the center beam 112 at the front end of the electric vehicle and the two vehicle beams 3 to accommodate other structural parts arranged on the two vehicle beams 3. On the other hand, it can also ensure the strength of the reinforcement connection mechanism 15 of the front cantilever beam 11, thereby ensuring the strength of the reinforcement connection mechanism 15 of the front cantilever beam 22 and the strength of the front cantilever beam 11.

[0137] like Figure 2 , Fig. 9 and Fig.10 As shown, in the width direction W of the electric vehicle, the locking beam 111 in the cantilever beam is located on the side of the corresponding vehicle beam 3, the locking beam 111 is hollow inside, and the locking mechanism 13 is arranged at the bottom of the locking beam 111 in the height direction H of the electric vehicle, so as to minimize the space occupied by the locking mechanism 13 in the length direction L of the electric vehicle, so as to reserve more space for the installation of the battery pack 2, thereby increasing the volume of the battery pack 2 adapted to the electric vehicle and improving the power of the battery pack 2. Since the cantilever beam is hollow inside, some components of the locking mechanism 13 and other inductive parts are arranged inside it, so in the length direction L of the electric vehicle, that is, in the length direction perpendicular to the locking beam 111, three inspection ports are arranged on one end face of each locking beam 111 facing the outside of the quick-change bracket 1, and these inspection ports can help technicians maintain the locking mechanism 13 and other components arranged inside the locking beam 111, which is convenient for later maintenance. Similarly, the locking beam 111 is provided with three weight-reducing holes on one end face facing the inside of the quick-change bracket 1 in the length direction L of the electric vehicle, and these weight-reducing holes are utilized to help reduce the structural weight of the locking beam 111 itself, while saving costs. Among them, the inspection port and the weight-reducing holes are respectively provided on the two opposite end faces of the locking beam 111 along the length of the electric vehicle, so that the overall structure of the locking beam 111 is more balanced, avoiding uneven force when the battery pack 2 is locked on the locking beam 111.

[0138] It should be noted that if Fig. 9 and Fig.10As shown, the inspection port and the weight-reducing hole on the locking beam 111 are covered by the cover plate 1111. It can be understood that the position of the cover plate 1111 in the figure is the position of the inspection port and the weight-reducing hole. The cover plate 1111 is connected to the inspection port and the weight-reducing hole to protect the locking beam 111 under normal circumstances, so as to prevent the components inside the locking beam 111 from being disturbed by external components under normal circumstances, thereby affecting their normal use. At the same time, when the cover plate 1111 is removed, the inspection port on the locking beam 111 is connected to the inside and outside of the locking beam 111, which is more helpful for maintenance personnel to repair the locking mechanism 13 and other components inside the locking beam 111 from the outside, and the inspection port is set corresponding to the locking mechanism 13, which further facilitates the maintenance personnel to repair the locking mechanism 13.

[0139] like Fig. 9 , Fig.12 and Fig.13 As shown, the quick-change bracket 1 also includes an avoidance member 182, and the avoidance member 182 is connected to the support portion 151. Along the width direction W of the electric vehicle, the avoidance member 182 protrudes from the end of the support portion 151 away from the locking beam 111 to the direction close to the locking beam 111, and the end of the avoidance member 182 away from the locking beam 111 forms a hollow avoidance space 1821. Specifically, the support portion 151 is provided with a through groove that penetrates in the width direction W of the electric vehicle, and the end of the avoidance member 182 close to the vehicle beam 3 in the width direction W of the electric vehicle is arranged in the through groove, so that the avoidance space 1821 is connected with the side of the support portion 151 close to the vehicle beam 3 in the width direction W of the electric vehicle. The avoidance space 1821 is used to avoid other components on the electric vehicle, thereby improving the application scope of the quick-change bracket 1. Among them, the avoidance member 182 and the support portion 151 in this embodiment are connected by a fixed connection method such as welding or integral molding.

[0140] In other alternative embodiments, if there is no structure on the electric vehicle that needs to be avoided, the avoidance member 182 may not be provided.

[0141] like Fig. 9 and Fig.13As shown, the quick-change bracket 1 also includes a connector 181, and the locking beam 111 is connected to the reinforcement connection mechanism 15 through the connector 181. The connector 181 is fixed to one end face of the support portion 151 in the width direction W of the electric vehicle, and the locking beam 111 is sleeved on the connector 181 and connected to the reinforcement connection mechanism 15. Specifically, the connector 181 is fixed to one end face of the support portion 151 in the width direction W of the electric vehicle away from the reinforcement portion 152, the locking beam 111 is a hollow structure and the locking beam 111 is open toward one end of the support portion 151 in the width direction W of the electric vehicle, and the locking beam 111 is sleeved on the outside of the connector 181 and is detachably connected to the connector 181. Since the locking beam 111 and the support portion 151 extend in different directions, the way in which the locking beam 111 is indirectly connected to the support portion 151 through the connector 181 can reduce the difficulty of connecting the two.

[0142] Specifically, the connecting member 181 includes a top plate 1811, a bottom plate 1812, a first side plate 1813 and a second side plate 1814. The top plate 1811 and the bottom plate 1812 are arranged at intervals along the height direction H of the electric vehicle, the first side plate 1813 and the second side plate 1814 are arranged at intervals along the length direction L of the electric vehicle, and the first side plate 1813 and the second side plate 1814 are respectively connected to the top plate 1811 and the bottom plate 1812 at both ends in the height direction H of the electric vehicle. The four wall surfaces of the locking beam 111 are respectively connected to the top plate 1811, the bottom plate 1812, the first side plate 1813 and the second side plate 1814 of the connecting member 181, so as to increase the connection area between the two and improve the connection effect between the two.

[0143] like Figures 9 to 11 As shown, the cantilever beam specifically includes two locking beams 111 symmetrically arranged relative to the vehicle beam 3, the two locking beams 111 are respectively arranged on both sides of the corresponding vehicle beam 3, and each locking beam 111 corresponds to a reinforcement connection mechanism 15, and the locking beam 111 is connected to the vehicle beam 3 through the corresponding reinforcement connection mechanism 15. Through this arrangement, the locking beams 111 on both sides of the vehicle beam 3 can be used to lock the battery pack 2, so that the structure of the electric vehicle at the position of the vehicle beam 3 is more symmetrical, and the number of battery packs 2 can be increased, thereby increasing the capacity.

[0144] In addition, the cantilever beam also includes a center beam 112, and two locking beams 111 are respectively arranged on both sides of the center beam 112 in the width direction W of the electric vehicle. The two ends of the center beam 112 in the width direction W of the electric vehicle are respectively connected to the reinforcement connection mechanism 15 on the corresponding side.

[0145] Specifically, the center beam 112 is disposed between the two reinforcement connection mechanisms 15, and the two ends of the center beam 112 in the width direction W of the electric vehicle are respectively connected to the reinforcement parts 152 on the corresponding sides, and then the connection with the locking beam 111 is realized through the reinforcement connection mechanism 15. The center beam 112 is used to connect the two reinforcement connection mechanisms 15 and the two locking beams 111 into a whole, to ensure the relative position accuracy of the two reinforcement connection mechanisms 15 and the two locking beams 111, and to improve the success rate of battery replacement.

[0146] On this basis, if Fig. 9 As shown, the quick-change bracket 1 also includes a first reinforcement member 171 and a second reinforcement member 172. Fig. 9 and Fig.11 As shown, the first reinforcement 171 and the second reinforcement 172 are both arranged on the outside of the locking beam 111, and the first reinforcement 171 is respectively connected to the support portion 151 of the reinforcement connection mechanism 15 and the locking beam 111, and is used to reinforce the connection between the reinforcement connection mechanism 15 and the locking beam 111, so as to further strengthen the connection stability between the two and improve the structural strength; the second reinforcement 172 is respectively connected to the reinforcement portion 152 of the reinforcement connection mechanism 15 and the center beam 112, and is used to reinforce the connection between the reinforcement connection mechanism 15 and the center beam 112, so as to further strengthen the connection stability between the two and further improve the structural strength of the cantilever beam and the connection stability between the cantilever beam and the vehicle beam 3.

[0147] like Figure 5 and Fig. 9 As shown, the quick-change bracket 1 also includes a first fastener 173, and a first reinforcement member 171 is disposed outside the locking beam 111. The first reinforcement member 171 is connected to the locking beam 111 and the support portion 151 in the reinforcement connection mechanism 15 through the first fastener 173, respectively, to reinforce the connection between the reinforcement connection mechanism 15 and the locking beam 111, enhance the connection strength between the support portion 151 and the locking beam 111, and improve the structural strength. Specifically, the first reinforcement member 171, the locking beam 111, the first side plate 1813, and the second side plate 1814 are connected through the first fastener 173. In this embodiment, the mutual connection between multiple structures is realized through the same first fastener 173, which can reduce the number of fasteners and connection holes on each structure, making the structure more compact.

[0148] like Figure 5 , Fig. 9 and Fig.11As shown, the quick-change bracket 1 also includes a second fastener 174, and the second reinforcement member 172 is connected to the center beam 112 and the reinforcement portion 152 in the reinforcement connection mechanism 15 respectively through the second fastener 174. The second reinforcement member 172 is used to reinforce the connection between the reinforcement connection mechanism 15 and the center beam 112, enhance the connection strength between the reinforcement portion 152 and the center beam 112, and improve the structural strength. The support portion 151, the reinforcement portion 152 and the second reinforcement member 172 are connected through the second fastener 174. In this embodiment, the interconnection between multiple structures is realized through the same second fastener 174, which can reduce the number of fasteners and connection holes on each structure, making the structure more compact.

[0149] like Fig. 9 and Fig.10 As shown, the quick-change bracket 1 also includes a locking determination mechanism, which is arranged on the cantilever beam and extends from the side of the cantilever beam. The locking determination mechanism specifically includes a moving part 41 and a fixing part 42. The locking determination mechanism is used to determine whether the battery pack 2 is locked on the quick-change bracket 1, so as to avoid ending the battery replacement process when the quick-change bracket 1 and the battery pack 2 are not locked, improve the reliability and safety of the battery replacement operation, prevent the battery pack 2 from falling off the electric vehicle, and ensure the safety of the electric vehicle. Among them, the cantilever beam is extended along the width direction W of the electric vehicle, and the locking determination mechanism is arranged on an end face of the cantilever beam along the length direction L of the electric vehicle. The reason is that when the cantilever beam extends along the width direction W of the electric vehicle, it has a larger installation space on the end face along the length direction L of the electric vehicle. When the locking determination mechanism is arranged on the end face, it also has enough space to move to complete the detection, and the structure is more reasonable.

[0150] Furthermore, if Fig.17 and Fig.18 As shown, the locking mechanism 13 includes a lock base 31 and a locking linkage 33. The lock base 31 is fixed on the locking beam 111 of the cantilever beam, and the locking linkage 33 is rotatably connected to the lock base 31 to lock or unlock the battery pack 2. Specifically, the upper end of the lock base 31 is arranged inside the locking beam 111 and connected to the locking beam 111, and the lower end of the lock base 31 is arranged outside the locking beam 111 and is used to cooperate with the locking member 21 on the battery pack 2. The lock base 31 is partially arranged inside the locking beam 111, which can reduce the space occupied by the lock base 31 in the height direction H of the electric vehicle, so that the battery pack 2 can be fixed at a higher position of the electric vehicle, reducing the risk of the bottom of the battery pack 2 contacting the ground, and can also design the height dimension of the battery pack 2 to be larger, increase the volume of the battery pack 2, and increase the power of the battery pack 2.

[0151] The lock base 31 in this embodiment is detachably connected to the locking beam 111 by bolts. In other alternative embodiments, other detachable or non-detachable connection methods can also be used to achieve the connection between the lock base 31 and the locking beam 111. The detachable connection method in this embodiment is used because the connection difficulty is low on the one hand, and on the other hand, when one of the lock base 31 and the locking beam 111 needs to be replaced, only the damaged part can be replaced, without replacing both, thereby reducing costs.

[0152] like Fig.19 and Fig. 20 As shown, the lower end of the lock base 31 is provided with a lock channel 32 for the lock member of the battery pack 2 to enter, and the lock mechanism 13 also includes a lock tongue 34, which is movably connected to the lock base 31, and the lower end of the lock tongue 34 is arranged in the lock channel 32 to open or close the entrance of the lock channel 32. The upper end of the lock tongue 34 extends out of the lock channel 32 to connect to the lock linkage 33, and the lock linkage 33 can drive the lock tongue 34 to rotate under the action of the unlocking mechanism of the battery exchange device to open or close the entrance of the lock channel 32.

[0153] Furthermore, if Figure 17-Figure 21 As shown, the locking mechanism 13 in this embodiment includes a primary locking mechanism 35 and a secondary locking mechanism 36. Fig.19 and Fig. 20 As shown, the primary locking mechanism 35 includes at least one primary lock base 351 and at least one primary lock tongue 352, and the locking linkage 33 of the primary locking mechanism 35 includes a lock link 353, which is arranged outside the primary lock base 351 and connected to at least one primary lock tongue 352. Specifically, the primary locking mechanism 35 in this embodiment includes a plurality of primary lock bases 351 and a plurality of primary lock tongues 352, the number of primary lock bases 351 and primary lock tongues 352 is the same and they are arranged one by one, the lock link 353 is arranged at the upper end of the primary lock base 351 and is simultaneously connected to the upper ends of the plurality of primary lock tongues 352, so as to realize the synchronous movement of the plurality of primary lock tongues 352.

[0154] like Fig.19 and Fig. 20As shown, the primary locking mechanism 35 further includes a primary elastic member 354, and the two ends of the primary elastic member 354 are respectively connected to the lock link 353 and the locking beam 111. Specifically, the primary locking mechanism 35 further includes a primary elastic member fixing seat 355, which is fixed on the locking beam 111 and located between the two primary lock bases 351, and the two ends of the primary elastic member 354 are respectively connected to the lock link 353 and the primary elastic member fixing seat 355, so as to realize the connection between the primary elastic member 354 and the locking beam 111, so as to realize the reset of the lock link 353. At the same time, the locking beam 111 applies a traction force to the lock link 353 through the primary elastic member fixing seat 355 and the primary elastic member 354, so as to prevent the lock link 353 from being in an unlocked state due to the bumping of the vehicle during driving.

[0155] Furthermore, if Fig.21 As shown, this embodiment includes two primary elastic members 354 and two primary elastic member fixing seats 355. The two primary elastic members 354 are respectively arranged on both sides of the lock link 353 in the length direction of the electric vehicle, and the two primary elastic member fixing seats 355 are respectively arranged on both sides of the lock link 353 in the length direction of the electric vehicle. The two primary elastic members 354 and the two primary elastic member fixing seats 355 are connected one by one to improve the resetting ability of the lock link 353.

[0156] In other alternative embodiments, the primary elastic member fixing seat 355 may not be directly fixed on the locking beam 111 , but may be directly fixed on the primary lock base 351 .

[0157] In other alternative embodiments, the primary elastic member fixing seat 355 may not be provided, and the primary elastic member 354 is provided on at least one primary lock base 351. In this state, one end of the primary elastic member 354 is connected to the lock link 353, and the other end of the primary elastic member 354 is directly connected to the primary lock base 351, so that the primary lock base 351 applies a traction force to the lock link 353 through the primary elastic member 354 to prevent the lock link 353 from being in an unlocked state due to the bumps of the vehicle during driving. Fig. 9 As shown, the primary elastic member 354 can be connected to one of the two primary lock bases 351 driven by the lock link 353.

[0158] During the battery swapping process, the unlocking mechanism on the battery swapping device abuts against the lock link 353, so that the lock link 353 is displaced in the width direction W of the electric vehicle and the height direction H of the electric vehicle. During the movement, the lock link 353 drives the multiple first-level lock tongues 352 to rotate synchronously to open the entrances of the locking channels 32 of the multiple first-level lock bases 351, so that the locking member 21 of the battery pack 2 can move into or out of the locking channel 32 through the entrance of the locking channel 32, thereby achieving the locking or unlocking of the battery pack 2. After the battery swapping is completed, the unlocking mechanism on the battery swapping device is disengaged from the lock link 353, and the lock link 353 is reset under the action of the first-level elastic member 354, thereby driving the multiple first-level lock tongues 352 to rotate in the opposite direction to close the entrance of the locking channel 32, thereby locking the locking member 21 of the battery pack 2 in the locking channel 32.

[0159] like Fig.19 and Fig. 20 As shown, the secondary locking mechanism 36 includes a secondary lock base 361 and a secondary lock tongue 362. The locking linkage 33 of the secondary locking mechanism 36 includes a secondary lock rod 363. The secondary lock rod 363 is arranged outside the secondary lock base 361 and connected to the secondary lock tongue 362. The primary locking mechanism 35 and the secondary locking mechanism 36 in this embodiment are two independent locking mechanisms. In this embodiment, the primary locking mechanism 35 and the secondary locking mechanism 36 are used to jointly lock the battery pack 2 to improve the locking effect of the battery pack 2, prevent the battery pack 2 from falling off due to failure of one of them, and improve the driving safety of the electric vehicle.

[0160] Furthermore, the secondary locking mechanism 36 further includes a secondary elastic member 364, and the secondary locking rod 363 of the secondary locking mechanism 36 is connected to the primary lock base 351 of the primary locking mechanism 35 through the secondary elastic member 364. Specifically, the secondary elastic member 364 is used to achieve the reset of the secondary locking rod 363, one end of the secondary elastic member 364 is connected to the secondary locking rod 363, and the other end of the secondary locking rod 363 is connected to the primary lock base 351, so as to shorten the distance between the primary locking mechanism 35 and the secondary locking mechanism 36, improve the space utilization of the locking mechanism 13, and is suitable for the case where the space at the connection between the electric vehicle and the battery pack 2 is limited.

[0161] In other alternative embodiments, the secondary elastic member 364 may not be directly connected to the primary lock base 351, and a secondary elastic member fixing seat may be designed to fix the secondary elastic member 364. The secondary elastic member fixing seat may be directly fixed to the locking beam 111, or directly fixed to the primary lock base 351 or the secondary lock base 361. The specific structure of the secondary elastic member fixing seat may be designed with reference to the structure of the primary elastic member fixing seat 355.

[0162] During the battery swapping process, the unlocking mechanism on the battery swapping device abuts against the secondary lock rod 363, so that the secondary lock rod 363 is displaced in the width direction W of the electric vehicle and the height direction H of the electric vehicle. During the movement, the secondary lock rod 363 drives the secondary lock tongue 362 to rotate synchronously to open the entrance of the locking channel 32 of the secondary lock base 361, so that the locking member 21 of the battery pack 2 can move into or out of the locking channel 32 through the entrance of the locking channel 32, thereby locking or unlocking the battery pack 2. After the battery swapping is completed, the unlocking mechanism on the battery swapping device disengages from the secondary lock rod 363, and the secondary lock rod 363 is reset under the action of the secondary elastic member 364, thereby driving the secondary lock tongue 362 to rotate in the opposite direction to close the entrance of the locking channel 32, thereby locking the locking member 21 of the battery pack 2 in the locking channel 32.

[0163] As shown in combination with 10, the locking determination mechanism includes a moving part 41 and a fixed part 42. The moving part 41 is connected to the locking linkage part 33 and rotates synchronously with the locking linkage part 33. The fixed part 42 is fixed on the locking beam 111. The locking determination mechanism determines whether the battery pack 2 is locked on the quick-change bracket 1 by detecting the relative position between the moving part 41 and the fixed part 42.

[0164] Specifically, during the battery replacement process, since the locking linkage 33 rotates in the first plane (the first plane is a plane composed of the height direction H of the electric vehicle and the width direction W of the electric vehicle), the locking linkage 33 will produce displacements in the width direction W of the electric vehicle and the height direction H of the electric vehicle relative to the locking beam 111, which causes the moving part 41 fixed on the locking linkage 33 to also produce displacements in the width direction W of the electric vehicle and the height direction H of the electric vehicle relative to the locking beam 111. Since the fixed part 42 is fixed on the locking beam 111, the moving part 41 can produce displacements in the width direction W of the electric vehicle and the height direction H of the electric vehicle relative to the fixed part 42. This embodiment determines whether the locking linkage 33 drives the locking tongue 34 to rotate in place by identifying the relative positions of the moving part 41 and the fixed part 42, that is, whether the locking tongue 34 completely closes the entrance of the locking channel 32, and then determines whether the battery pack 2 is locked on the quick-change bracket 1.

[0165] Among them, when the distance between the moving part 41 and the fixed part 42 is within the preset distance range, it is judged that the battery pack 2 can be locked on the quick-change bracket 1. Specifically, the battery exchange equipment is provided with an identification device (specifically, it can be a camera or other structure) for identifying the distance between the moving part 41 and the fixed part 42 in the width direction W of the electric vehicle. When the distance between the moving part 41 and the fixed part 42 in the width direction W of the electric vehicle is within the preset distance range, it is judged that the battery pack 2 can be locked on the quick-change bracket 1. Compared with a fixed preset distance, the preset distance range can reduce the installation accuracy requirements for the moving part 41 and the fixed part 42, and improve the feasibility of the locking judgment operation.

[0166] In other alternative embodiments, the identification device may not determine whether the battery pack 2 is locked successfully by identifying the distance between the moving part 41 and the fixing part 42 in the width direction W of the electric vehicle. It may also determine whether the battery pack 2 is locked successfully by identifying the distance between the moving part 41 and the fixing part 42 in the height direction H of the electric vehicle, or simultaneously identify the distance between the moving part 41 and the fixing part 42 in the width direction W of the electric vehicle and the distance between the moving part 41 and the fixing part 42 in the height direction H of the electric vehicle to jointly determine whether the battery pack 2 is locked successfully. The identification device of the present embodiment only identifies the distance between the movable part 41 and the fixed part 42 in the width direction W of the electric vehicle because the identification device is fixed on the battery swapping device, and the battery swapping device is located below the quick-change bracket 1 (that is, the battery swapping device is located below the movable part 41 and the fixed part 42). Therefore, it is inconvenient to identify the distance between the movable part 41 and the fixed part 42 in the height direction H of the electric vehicle. Therefore, when the battery is swapped at the bottom of the electric vehicle, the distance between the movable part 41 and the fixed part 42 in the width direction W of the electric vehicle can be directly identified without fixing the identification device separately, thereby simplifying the structure and reducing costs.

[0167] In addition, since the movable part 41 is fixed on the locking linkage part 33 to achieve synchronous rotation with the locking linkage part 33, there will be no delay or incomplete rotation of the movable part 41, thereby improving the accuracy of detection and improving the reliability and safety of the battery replacement operation.

[0168] like Fig.17 and Fig.18 As shown, the moving part 41 extends from the side of the locking beam 111. Specifically, the moving part 41 extends from a side of the locking beam 111 toward the outside of the quick-change bracket 1 along the length direction L of the electric vehicle to prevent the moving part 41 from interfering with the battery pack 2 and improve the reliability of the battery replacement operation.

[0169] In other alternative embodiments, without interfering with the battery pack 2, the movable member 41 may extend from a side of the locking beam 111 in the length direction L of the electric vehicle toward the inside of the quick-change bracket 1, or the movable member 41 may extend from the side of the locking beam 111 in the width direction W of the electric vehicle.

[0170] Furthermore, the locking beam 111 is provided with an opening for the moving part 41 to pass through on one side surface facing the outside of the quick-change bracket 1 in the length direction L of the electric vehicle, and the moving part 41 extends from the opening to the outside of the locking beam 111, so that the part of the moving part 41 located inside the locking beam 111 can be connected with the locking linkage 33, and the part of the moving part 41 located outside the locking beam 111 can be matched and identified with the fixing part 42 to determine whether the battery pack 2 is locked on the quick-change bracket 1. The hollow locking beam 111 provides space for the moving part 41 to move, so that the moving part 41 can move synchronously with the locking linkage 33.

[0171] like Figure 17-Figure 21 As shown, the moving member 41 includes a first connecting portion 411 and a first detecting portion 412 connected to each other. The first connecting portion 411 is disposed inside the locking beam 111 and connected to the locking linkage member 33 to achieve synchronous movement of the moving member 41 and the locking linkage member 33. The first detecting portion 412 is disposed outside the locking beam 111 and is used to cooperate with the fixing member 42 to determine whether the battery pack 2 is locked on the quick-change bracket 1.

[0172] Specifically, the moving member 41 in this embodiment is Z-shaped, and the moving member 41 includes a first bending section 413, a second bending section 414, and a third bending section 415 connected in sequence, the second bending section 414 is bent upward relative to the first bending section 413, the first bending section 413 forms the first connecting portion 411 of the moving member 41 to connect with the locking linkage 33, and the third bending section 415 forms the first detecting portion 412 of the moving member 41 to cooperate with the fixing member 42. The second bending section 414 raises the position of the first detecting portion 412 to prevent the first detecting portion 412 from interfering with other parts of the locking beam 111 and the battery swapping equipment, thereby improving the reliability of the battery swapping operation.

[0173] like Fig.17 and Fig.18 As shown, the fixing member 42 is fixed to the side of the locking beam 111 from which the moving member 41 extends, that is, the fixing member 42 and the moving member 41 are arranged on the same side of the locking beam 111, so that the moving member 41 and the fixing member 42 can jointly use the space on the same side of the locking beam 111, thereby improving space utilization and reducing the possibility of interference with the battery pack 2. Specifically, the fixing member 42 is fixed to a side surface of the locking beam 111 facing the outside of the quick-change bracket 1 in the length direction L of the electric vehicle, so as to prevent the moving member 41 from interfering with the battery pack 2 and improve the reliability of the battery replacement operation.

[0174] In other alternative embodiments, the fixing member 42 may not be fixed to the side of the locking beam 111 from which the moving member 41 extends. For example, the fixing member 42 may be fixed to a side of the locking beam 111 away from the extending end of the moving member 41 in the length direction L of the electric vehicle, or may be fixed to the side of the locking beam 111 in the width direction W of the electric vehicle.

[0175] like Fig. 9 As shown, the fixing member 42 in this embodiment is an inverted L-shaped structure, and the fixing member 42 includes a fourth bending section 421 and a fifth bending section 422 that are connected to each other. The fourth bending section 421 forms a second connecting portion 423, and the second connecting portion 423 is connected to the locking beam 111 to achieve the fixation of the fixing member 42 on the locking beam 111. The fifth bending section 422 forms a second detection portion 424, and the second detection portion 424 cooperates with the first detection portion 412 to determine whether the battery pack 2 is locked on the electric vehicle. The inverted L-shaped fixing member 42, on the one hand, ensures the connection area between the fixing member 42 and the locking beam 111, and ensures the connection strength between the two. On the other hand, it also ensures the area of ​​the second detection portion 424, which facilitates the identification of the relative positions of the first detection portion 412 and the second detection portion 424.

[0176] Furthermore, if Fig.19 and Fig. 20 As shown, the moving member 41 in this embodiment includes a first moving member 416 and a second moving member 417, wherein the first moving member 416 is connected to the locking linkage member 33 of the primary locking mechanism 35, and the second moving member 417 is connected to the locking linkage member 33 of the secondary locking mechanism 36. Specifically, the first moving member 416 corresponding to the primary locking mechanism 35 is arranged on the locking link 353 to move synchronously with the locking link 353 of the primary locking mechanism 35, and the second moving member 417 corresponding to the secondary locking mechanism 36 is arranged on the secondary locking rod 363 to move synchronously with the second locking rod of the secondary locking mechanism 36. The first moving member 416 is connected to the primary lock tongue 352 through the locking link 353 outside the primary lock base 351, and the second moving member 417 is connected to the secondary lock tongue 362 through the secondary locking rod 363 outside the secondary lock base 361, so that the connection difficulty is low and it is easy to install.

[0177] In this embodiment, since the first-level locking mechanism 35 includes multiple first-level lock bases 351 and multiple first-level lock tongues 352, the first movable member 416 is directly fixed on the lock link 353. On the one hand, it is convenient to connect the first movable member 416 and the first-level locking mechanism 35. On the other hand, there is no need for each first-level lock tongue 352 to be connected to the corresponding first movable member 416, thereby simplifying the first-level locking mechanism 35 and reducing costs.

[0178] Furthermore, if Fig.17As shown, the fixing member 42 is disposed between the first movable member 416 and the second movable member 417, and the first movable member 416 and the second movable member 417 cooperate with the same fixing member 42. Specifically, it is disposed between the first movable member 416 and the second movable member 417 along the width direction W of the electric vehicle, and the identification device on the battery exchange device determines whether the primary locking mechanism 35 completely locks the battery pack 2 by identifying whether the distance between the first movable member 416 and the fixing member 42 in the width direction W of the electric vehicle is within the first preset distance range, and the identification device on the battery exchange device determines whether the secondary locking mechanism 36 completely locks the battery pack 2 by identifying whether the distance between the second movable member 417 and the fixing member 42 in the width direction W of the electric vehicle is within the second preset distance range. The first movable member 416 and the second movable member 417 share a fixing member 42, which can simplify the structure of the locking determination mechanism, reduce costs, and make the layout of the locking detection mechanism more compact, so that the recognition range of the recognition device used to identify the relative position between the movable member 41 and the fixing member 42 is smaller, and the overall recognition device does not need to be designed to be very large.

[0179] The specific values ​​of the first preset distance range and the second preset distance range can be designed according to actual conditions, and the two can be the same or different.

[0180] In other alternative embodiments, the fixing member 42 may be disposed at other positions, such as at a side of the first movable member 416 away from the second movable member 417 in the width direction of the electric vehicle, etc. The specific design may be based on actual conditions.

[0181] In this embodiment, the locking mechanisms 13 and locking determination mechanisms on the two locking beams 111 on the same cantilever beam have the same structure, and the front cantilever beam 11 and the rear cantilever beam 12 also use the same locking mechanism 13 and locking determination structure.

[0182] The locking determination mechanism described above is used for the station end of the battery swap station to determine whether the battery pack 2 is locked on the quick-change bracket 1. This embodiment further discloses a structure for the vehicle end of the electric vehicle to determine whether the battery pack 2 is locked on the quick-change bracket 1.

[0183] like Fig.18As shown, a sensor 5 is also provided in the locking beam 111 for detecting the position of the locking linkage 33 to determine whether the battery pack 2 is locked on the quick-change bracket 1. Specifically, the sensor 5 is arranged inside the locking beam 111 and fixed on the locking beam 111. The sensor 5 detects the position of the locking linkage 33 relative to the locking beam 111 to enable the electric vehicle to determine whether the battery pack 2 is locked on the quick-change bracket 1, so that the driver can determine the locking mechanism 13 conveniently, avoid ending the battery replacement process when the quick-change bracket 1 and the battery pack 2 are not locked, improve the reliability and safety of the battery replacement operation, prevent the battery pack 2 from falling off the electric vehicle, and ensure the safety of the electric vehicle.

[0184] The sensor 5 may be a distance measuring sensor 5 available in the prior art, such as a Hall sensor, etc. The position of the locking linkage 33 relative to the locking beam 111 detected by the sensor 5 may be the position of the locking linkage 33 relative to the locking beam 111 in the width direction W of the electric vehicle, or the position of the locking linkage 33 relative to the locking beam 111 in the height direction H of the electric vehicle, and the specific design may be based on actual conditions.

[0185] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A quick-change bracket, used for mounting on a beam of an electric vehicle to fix a battery pack, characterized in that: The quick-change bracket includes a cantilever beam, a locking mechanism and a fixing mechanism, wherein the cantilever beam includes a front cantilever beam and a rear cantilever beam spaced apart on the vehicle beam along the length direction of the electric vehicle, wherein: The fixing mechanism is arranged between the front cantilever beam and the rear cantilever beam, and the fixing mechanism is connected to the front cantilever beam and the rear cantilever beam respectively; The locking mechanism is arranged on the front cantilever beam and the rear cantilever beam, and the locking mechanism is used to be locked and connected with the locking piece on the battery pack.

2. The quick-change bracket according to claim 1, characterized in that: The fixing mechanism comprises a connecting portion, which is connected between the front cantilever beam and the rear cantilever beam and is used to limit the relative position between the front cantilever beam and the rear cantilever beam.

3. The quick-change bracket according to claim 2, characterized in that: The fixing mechanism also includes a reinforcing portion, which is connected between the connecting portion and the vehicle beam and is used to reinforce a frame structure formed by the connecting portion, the front cantilever beam and the rear cantilever beam.

4. The quick-change bracket according to claim 3, characterized in that: The length of the connecting portion between the front cantilever beam and the rear cantilever beam is adjustable; And / or, the connecting portion includes at least two connecting beams, at least two connecting beams are spaced apart in the extension direction of the front cantilever beam or the rear cantilever beam, and two ends of any one of the connecting beams are respectively connected to the front cantilever beam and the rear cantilever beam.

5. The quick-change bracket according to claim 4, characterized in that: The reinforcement portion includes at least one reinforcement beam, an extension direction of the reinforcement beam and an extension direction of any one of the connecting beams form an included angle, and at least one end of the reinforcement beam is connected to one of the connecting beams.

6. The quick-change bracket according to claim 5, characterized in that: The at least two connecting beams include two first connecting beams, which are respectively arranged on both sides of the vehicle beam, and the first connecting beams are connected to corresponding edge positions of the front cantilever beam and the rear cantilever beam in the extending direction.

7. The quick-change bracket according to claim 6, characterized in that: Two ends of the reinforcement beam are respectively connected to the middle positions of the two first connection beams.

8. The quick-change bracket according to claim 1, characterized in that: The front cantilever beam and the rear cantilever beam are arranged on the vehicle beam along the width direction of the electric vehicle; the locking mechanism on the front cantilever beam and the rear cantilever beam is used to lock or unlock the battery pack arranged on the side of the vehicle beam along the width direction of the electric vehicle; And / or, at least ends of the front cantilever beam and the rear cantilever beam on the same side extend out of the vehicle beam, and the locking mechanism is provided at the ends of the front cantilever beam and the rear cantilever beam extending out of the vehicle beam; And / or, the quick-change bracket further comprises an electrical connector, the electrical connector is arranged below the vehicle beam along the height direction of the electric vehicle, and the electrical connector is used to be electrically connected to the battery pack; And / or, a positioning mark is provided on at least one side of the cantilever beam in the width direction of the electric vehicle.

9. The quick-change bracket according to claim 1, characterized in that: The cantilever beam includes a locking beam arranged on at least one side of the vehicle beam, the locking beam is used to arrange the locking mechanism and is connected to the battery pack through the locking mechanism; the quick-change bracket also includes a reinforcement connection mechanism, and the locking beam is connected to the side of the vehicle beam through the reinforcement connection mechanism.

10. The quick-change bracket according to claim 9, characterized in that: The reinforcement connection mechanism is a stacked structure; and / or an angle is formed between an extension direction of the reinforcement connection mechanism and an extension direction of the locking beam.

11. The quick-change bracket according to claim 9, characterized in that: Along the width direction of the electric vehicle, two ends of the reinforcement connection mechanism are respectively connected to the vehicle beam and the locking beam; And / or, the reinforcement connection mechanism extends along the length direction of the electric vehicle, and the locking beam extends along the width direction of the electric vehicle; And / or, the reinforcement connection mechanism includes a support portion and a reinforcement portion that are stacked, and the locking beam is connected to at least one side of the vehicle beam through the support portion and the reinforcement portion that are stacked.

12. The quick-change bracket according to claim 11, characterized in that: The support portion and the reinforcement portion are stacked in a width direction of the electric vehicle.

13. The quick-change bracket according to claim 9, characterized in that: The locking beam is a hollow structure, and the locking mechanism is arranged on the locking beam.

14. The quick-change bracket according to claim 13, characterized in that: The locking beam is provided with at least one inspection opening on one end surface facing the outside of the quick-change bracket in the length direction of the electric vehicle; And / or, the locking beam is provided with at least one weight-reducing hole on one end surface facing the inside of the quick-change bracket in the length direction of the electric vehicle; Wherein, the inspection port and the weight-reducing hole are respectively arranged on two opposite end surfaces of the locking beam along the length direction of the electric vehicle.

15. The quick-change bracket according to claim 14, characterized in that: The inspection port communicates with the interior and exterior of the locking beam, and the inspection port is arranged corresponding to the locking mechanism; And / or, at least one end surface of the locking beam opposite to each other along the length direction of the electric vehicle is detachably connected to at least one sealing plate, and the sealing plate is used to connect to the inspection port or the weight-reducing hole.

16. The quick-change bracket according to claim 9, characterized in that: The quick-change bracket further includes a connecting piece, the connecting piece is fixed to an end surface of the reinforcing connecting mechanism in the width direction of the electric vehicle, the locking beam is sleeved on the connecting piece and connected to the reinforcing connecting mechanism; And / or, the quick-change bracket further includes a first reinforcement member, the first reinforcement member is arranged outside the locking beam, the first reinforcement member is respectively connected to the reinforcement connection mechanism and the locking beam, and is used to reinforce the connection between the reinforcement connection mechanism and the locking beam; And / or, the quick-change bracket also includes an avoidance piece, which is connected to the reinforcement connection mechanism. Along the width direction of the electric vehicle, the avoidance piece protrudes from the end connected to the reinforcement connection mechanism in the direction close to the locking beam, and the end of the avoidance piece away from the locking beam forms a hollow avoidance space.

17. The quick-change bracket according to claim 9, characterized in that: The cantilever beam includes two locking beams symmetrically arranged relative to the vehicle beam, the two locking beams are respectively arranged on both sides of the vehicle beam, and each locking beam corresponds to a reinforcement connection mechanism, and the locking beam is connected to the vehicle beam through the reinforcement connection mechanism on the same side.

18. The quick-change bracket according to claim 17, characterized in that: The cantilever beam also includes a center beam, and the two locking beams are respectively arranged on both sides of the center beam in the width direction of the electric vehicle, and the two ends of the center beam in the width direction of the electric vehicle are respectively connected to the reinforcement connection mechanism on the corresponding side.

19. The quick-change bracket according to claim 18, characterized in that: The quick-change bracket also includes a second reinforcement member, which is arranged outside the center beam and is connected to the reinforcement connection mechanism and the center beam respectively, so as to reinforce the connection between the reinforcement connection mechanism and the center beam.

20. The quick-change bracket according to any one of claims 1 to 19, characterized in that: The quick-change bracket further includes a locking determination mechanism, which extends from a side surface of the cantilever beam and is used to determine whether the battery pack is locked on the quick-change bracket.

21. The quick-change bracket according to claim 20, characterized in that: The cantilever beam is extended along the width direction of the electric vehicle, and the lock determination mechanism is arranged on an end surface of the cantilever beam along the length direction of the electric vehicle.

22. The quick-change bracket according to claim 20, characterized in that: The locking mechanism comprises a lock base and a locking linkage, wherein the lock base is fixed on the cantilever beam, and the locking linkage is rotatably connected to the lock base to lock or unlock the battery pack; The locking determination mechanism includes a moving part and a fixed part, the moving part is connected to the locking linkage part and moves synchronously with the locking linkage part, the fixed part is fixed on the cantilever beam, and the locking determination mechanism determines whether the battery pack is locked on the quick-change bracket by detecting the relative position between the moving part and the fixed part.

23. The quick-change bracket according to claim 22, characterized in that: When the distance between the moving part and the fixed part is within a preset distance range, the battery pack can be locked on the quick-change bracket; And / or, the cantilever beam is a hollow structure, and the moving member extends out from an opening formed on a side surface of the cantilever beam; And / or, the fixing member is fixedly arranged on the side surface of the cantilever beam from which the moving member extends; And / or, the locking mechanism includes a primary locking mechanism and a secondary locking mechanism, the moving member includes a first moving member and a second moving member, the first moving member is connected to the locking linkage member of the primary locking mechanism, the second moving member is connected to the locking linkage member of the secondary locking mechanism, and the first moving member and the second moving member cooperate with the same fixed member; And / or, the cantilever beam is a hollow structure, and a first sensor is further provided in the cantilever beam for detecting the position of the locking linkage to determine whether the battery pack is locked on the quick-change bracket.

24. An electric vehicle, characterized in that: The electric vehicle comprises a quick-change bracket as described in any one of claims 1-23.

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