Quick-change support and electric vehicle comprising same

Abstract

The utility model discloses a quick-change support and an electric vehicle comprising the quick-change support, the quick-change support comprises a cantilever beam and a locking mechanism, and the cantilever beam comprises a front cantilever beam and a rear cantilever beam which extend in the width direction of the electric vehicle; the locking mechanism is arranged on the front cantilever beam and the rear cantilever beam and used for locking or unlocking the battery pack arranged on the side edge of the vehicle beam in the width direction of the electric vehicle. According to the quick-change support and the electric vehicle comprising the quick-change support, the locking mechanisms are arranged on the front cantilever beam and the rear cantilever beam and are locked or unlocked in the width direction of the electric vehicle, so that the space occupied by the quick-change support in the length direction of the electric vehicle is reduced, and the space occupied by a circuit in the length direction is saved; therefore, enough lateral space can be reserved to facilitate lateral battery replacement of the electric vehicle, the locking mechanism can be prevented from occupying a battery pack taking and placing path of the battery replacement equipment, the battery pack taking and placing path is consistent with the locking path, and the battery replacement efficiency of lateral battery replacement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a quick-change bracket and an electric vehicle comprising the same. Background Art

[0002] The battery packs of existing battery-swap vehicles are generally divided into fixed and quick-change types. Among them, fixed batteries are generally fixed on the vehicle, and the vehicle is directly used as the charging object during charging. The quick-change battery pack is generally fixed on the vehicle's bracket through a movable installation. The depleted battery pack can be removed and a fully charged battery pack can be installed on the vehicle to replace or charge the battery pack separately. After the replaced battery pack is charged, it can be reinstalled on the vehicle.

[0003] Among them, for quick-change battery packs, the battery pack is usually replaced from the bottom of the battery-swapping vehicle, so the existing battery locking method is generally set corresponding to the replacement of the battery pack at the bottom. When the existing battery locking method is applied to the side-to-side battery swapping of the vehicle, the battery pack is usually locked along the length direction of the electric vehicle, which will cause the problem of occupying the space in the length direction of the electric vehicle, thereby affecting the battery swap efficiency. 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 battery pack is locked along the length direction of the electric vehicle, resulting in occupying the space in the length direction of the electric vehicle, and to provide a quick-change bracket and an electric vehicle including the same.

[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, the quick-change bracket comprising a cantilever beam and a locking mechanism, the cantilever beam comprising a front cantilever beam and a rear cantilever beam extending in a width direction of the electric vehicle;

[0007] The locking mechanism is arranged on the front cantilever beam and the rear cantilever beam, and is used to lock or unlock the battery pack arranged on the side of the beam along the width direction of the electric vehicle.

[0008] In the present scheme, by arranging the locking mechanism on the front and rear cantilever beams, and locking or unlocking along the width direction (i.e., the Y direction) of the electric vehicle, the space occupied by the quick-change bracket in the length direction (X direction) of the electric vehicle is reduced, and the space occupied by the circuit in the X direction is saved, so that sufficient lateral space can be reserved to facilitate lateral battery replacement of the electric vehicle, thereby improving the battery replacement efficiency of lateral battery replacement; in addition, locking or unlocking along the width direction (i.e., the Y direction) of the electric vehicle can avoid the locking mechanism occupying the path for the battery replacement equipment to take and place the battery pack, thereby further improving the battery replacement efficiency of lateral battery replacement; in addition, the battery pack removal and placement path is consistent with the locking path, that is, both are along the Y direction, which is conducive to improving the battery replacement efficiency of lateral battery replacement.

[0009] Preferably, the front cantilever beam and the rear cantilever beam are both connected to the vehicle beam;

[0010] 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 arranged at the ends of the front cantilever beam and the rear cantilever beam extending out of the vehicle beam.

[0011] In this solution, the locking mechanism is set at the end of the front and rear cantilever beams extending out of the vehicle beam, so as to adapt the battery pack to enter the quick-change bracket from the side of the vehicle beam and be locked with the locking mechanism. In addition, the locking mechanism is installed on the cantilever beams at both ends of the quick-change bracket, so that the force at the front and rear ends of the quick-change bracket is balanced, which is conducive to improving the stability of the quick-change bracket carrying the battery pack.

[0012] Preferably, the cantilever beam includes a locking beam arranged on at least one side of the vehicle beam, and the locking beam is used for arranging the locking mechanism and is connected to the battery pack through the locking mechanism.

[0013] In this solution, by arranging the locking mechanism on the side of the vehicle beam, the battery pack can be locked or unlocked on the side of the vehicle beam, thereby facilitating lateral battery replacement of the electric vehicle and improving the efficiency of lateral battery replacement.

[0014] Preferably, the locking beam is a hollow structure, and the locking mechanism is arranged inside the locking beam.

[0015] In this solution, the locking beam is a hollow structure, and the locking mechanism is arranged inside the locking beam to reduce the space occupied by the locking mechanism in the height direction of the electric vehicle, thereby reserving sufficient vertical space for installing the battery pack.

[0016] Preferably, the locking mechanism comprises a lock base and a locking linkage, the lock base is fixed on the locking beam, and the locking linkage is rotatably connected to the lock base to lock or unlock the battery pack.

[0017] In this solution, the locking linkage is connected to the lock base through rotation, thereby realizing a method of locking or unlocking the battery pack.

[0018] Preferably, the upper end of the lock base is arranged inside the locking beam and connected to the locking beam, and the lower end of the lock base is arranged outside the locking beam and is used to cooperate with the locking member on the battery pack;

[0019] And / or, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for the locking member of the battery pack to enter the cavity, and the locking linkage moves relative to the lock base to open or close the opening to change between an unlocked state and a locked state.

[0020] In this solution, the lock base is fixed in a locking beam with a hollow structure to protect the lock base from external damage or interference. In addition, the space occupied by the locking mechanism in the height direction of the electric vehicle can be reduced, so that sufficient vertical space can be reserved for installing the battery pack. The upper and lower ends of the lock base adopt the above-mentioned settings to achieve two connections, namely, connection with the quick-change bracket (body bracket) and connection with the battery pack, so that the battery pack can be hung on the quick-change bracket; through the cavity of the above-mentioned structure, the locking part of the battery pack has a movable space to achieve locking / unlocking operations, and the locking linkage moves relative to the lock base to open or close the opening, so that the locking part of the battery pack can be controlled to enter the cavity in the locked state and leave the cavity in the unlocked state, thereby achieving locking or unlocking operations.

[0021] Preferably, the locking mechanism includes a primary locking mechanism and a secondary locking mechanism, wherein the secondary locking mechanism is used to provide a secondary locking or locking protection function for the battery pack to prevent the battery pack from falling when the primary locking mechanism fails;

[0022] In this solution, the battery pack is locked or unlocked through a two-stage locking mechanism, and double locking insurance is achieved through the secondary locking mechanism, thereby improving the reliability of the locking function.

[0023] Preferably, the locking linkage of the primary locking mechanism comprises a locking link and at least one primary lock tongue; the primary locking mechanism comprises at least one primary lock base, the locking link is rotatably connected to at least one primary lock tongue, and is used to drive the primary lock tongue to rotate, so that the primary lock tongue can rotate relative to the primary lock base to change between an unlocked state and a locked state;

[0024] And / or, the locking linkage of the secondary locking mechanism comprises a secondary locking rod and a secondary locking tongue; the secondary locking mechanism comprises a secondary lock base; the secondary locking rod is rotatably connected to the secondary locking tongue, and is used to drive the secondary locking tongue to rotate, so that the secondary locking tongue rotates relative to the secondary lock base to change between an unlocked state and a locked state;

[0025] And / or, the locking linkage of the secondary locking mechanism further comprises a secondary locking rod and a secondary elastic member; the secondary locking rod of the secondary locking mechanism is connected to the lock base of the primary locking mechanism via the secondary elastic member;

[0026] And / or, the locking linkage of the primary locking mechanism includes a lock link and a primary elastic member; the primary locking mechanism includes at least one primary lock base; the primary elastic member is arranged on at least one of the primary lock bases, and the two ends of the primary elastic member are respectively connected to the lock link and one of the primary lock bases; or, the primary elastic member is arranged on the cantilever beam, and the two ends of the primary elastic member are respectively connected to the lock link and the cantilever beam.

[0027] In this solution, through the above-mentioned structural arrangement, the two-stage locking mechanism realizes the change of the lock tongue between the locked and unlocked states relative to the lock base through the rotational connection between the respective lock links or lock rods and the lock tongue, thereby realizing the locking or unlocking function. Through the above-mentioned primary elastic member and utilizing its elastic function, the primary locking mechanism can be reset, and the locked state can be kept stable during the locking process, thereby improving the locking stability. Through the above-mentioned secondary elastic member and utilizing its elastic function, the secondary locking mechanism can be reset, and the two-stage locking mechanism is connected, and the two-stage locking mechanism is arranged in the limited space of the locking beam, saving the installation space of the locking mechanism.

[0028] 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;

[0029] The inspection port communicates with the interior and exterior of the locking beam, and the inspection port is arranged corresponding to the locking mechanism.

[0030] In this solution, the inspection port is used to facilitate the inspection of the locking mechanism; the inspection port is set on the outer end surface of the quick-change bracket in the length direction, which is convenient for maintenance personnel standing outside to perform maintenance operations; at the same time, the inspection port also reduces the weight of the locking beam. The inspection port is set corresponding to the locking mechanism to avoid being unable to reach into the locking mechanism for maintenance.

[0031] Preferably, 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;

[0032] 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;

[0033] Preferably, at least one end surface of the locking beam opposite to each other along the length direction of the electric vehicle is detachably connected with at least one sealing plate, and the sealing plate is used for the inspection port or the weight-reducing hole.

[0034] In this solution, the weight of the locking beam is reduced by the weight-reducing hole provided by the above structure. The inspection port and the weight-reducing hole are respectively provided on two opposite end faces, thereby achieving the purpose of inspection function and weight reduction at the same time. The locking mechanism is protected in the hollow structure of the locking beam by a detachable cover plate, which can also serve as a window for inspection function or block the weight-reducing hole.

[0035] Preferably, the quick-change bracket further comprises a connecting piece, the connecting piece is connected to the vehicle beam, the locking beam is sleeved on the connecting piece and connected to the connecting piece;

[0036] Preferably, the quick-change bracket also includes an avoidance member, which is socketed with the connecting member and connected to the locking beam; along the width direction of the electric vehicle, the avoidance member protrudes toward the locking beam to form a hollow avoidance space at the end away from the locking beam.

[0037] In this solution, the locking beam is connected to the connecting member in a sleeve manner, which is conducive to improving the connection strength and reliability. Through the avoidance member of the above structure, a hollow avoidance space is formed at the connection between the locking beam and the vehicle beam to avoid conflict with other parts of the vehicle beam. The avoidance member and the connecting member are sleeved with each other, and the avoidance member is connected to the locking beam, so that the locking beam forms an avoidance space while being connected to the vehicle beam, and the two do not conflict.

[0038] Preferably, the quick-change bracket also includes a reinforcing connection structure, which is fixed on the vehicle beam and connected to the connecting piece, and the locking beam is connected to the vehicle beam through the connecting piece and the reinforcing connection structure, and the reinforcing connection structure is used to reinforce the connection between the locking beam and the vehicle beam.

[0039] In this solution, the connection strength between the locking beam, the connecting member and the vehicle beam is enhanced by reinforcing the connection structure, so that the locking beam has a better ability to withstand the impact of locking or unlocking operations.

[0040] Preferably, the connecting member is fixed to an end surface of the reinforcing connecting structure along the width direction of the electric vehicle;

[0041] And / or, the avoidance member is connected to the reinforcing connection structure along the width direction of the electric vehicle; along the width direction of the electric vehicle, the avoidance member protrudes from one end connected to the reinforcing connection structure toward the locking beam, and the end of the avoidance member away from the locking beam forms a hollow avoidance space;

[0042] And / or, the quick-change bracket also includes a first reinforcement member, which is arranged on the outside of the locking beam; the first reinforcement member is respectively connected to the reinforcement connection structure and the locking beam, and is used to reinforce the connection between the reinforcement connection structure and the locking beam.

[0043] In this solution, the connecting piece is fixed to one end face of the reinforcing connecting structure in the width direction, which adapts to the form of the locking mechanism being arranged in the width direction, and the connecting piece and the reinforcing connecting structure are connected to the locking beam from two different directions, respectively, thereby improving the connection strength. Through the avoidance piece of the above structure, an avoidance space is formed on the outer side of the reinforcing connecting structure toward the locking beam. Through the first reinforcing piece, the connection strength between the locking beam and the reinforcing connecting structure is enhanced.

[0044] Preferably, the cantilever beam comprises two locking beams symmetrically arranged relative to the vehicle beam, and any one of the locking beams is connected to the vehicle beam along the width direction of the electric vehicle and close to one end of the vehicle beam;

[0045] Preferably, the cantilever beam further includes a center beam, the two locking beams are respectively arranged on both sides of the center beam in the width direction of the electric vehicle, and the center beam is straddled on the vehicle beam and connected to the vehicle beam.

[0046] In this solution, the two locking beams are symmetrically arranged relative to the vehicle beam, balancing the forces on both sides of the vehicle beam, making the overall structure of the quick-change bracket stable. The central beam is arranged across the vehicle beam and connected to the vehicle beam, thereby enhancing the connection strength of the quick-change bracket between the two vehicle beams.

[0047] Preferably, the two locking beams are respectively connected to the two sides of the vehicle beam, and a reinforcement connection structure is provided on the corresponding side of each locking beam, and the locking beam is connected to the vehicle beam through the reinforcement connection structure on the corresponding side;

[0048] and / or, the two ends of the central beam in the width direction of the electric vehicle are respectively connected to the reinforcement connection structures on the corresponding sides;

[0049] And / or, the quick-change bracket also includes a second reinforcement member, which is arranged on the outside of the center beam; the second reinforcement member is respectively connected to the reinforcement connection structure and the center beam, and is used to reinforce the connection between the reinforcement connection structure and the center beam.

[0050] In this solution, the locking beam is connected to the vehicle beam through the reinforcement connection structure on the corresponding side, thereby improving the structural stability of the vehicle beam on the two outer sides; and the structural stability of the inner side of the vehicle beam is improved through the second reinforcement member.

[0051] Preferably, the quick-change bracket further comprises an electrical connector, which is arranged below the vehicle beam along the width direction of the electric vehicle, and is used to be electrically connected to the battery pack;

[0052] And / or, a protective plate is provided on the lower side of the electrical connector;

[0053] And / or, a positioning mark is provided on at least one side of the cantilever beam in the width direction of the electric vehicle.

[0054] In this solution, the electrical connector is arranged below the vehicle beam along the width direction (i.e., Y direction) of the electric vehicle, which reduces the space occupied along the length direction (i.e., X direction) of the electric vehicle. Only enough distance needs to be reserved in the Y direction for battery replacement, which saves the space occupied by the circuit in the X direction and facilitates the alignment and connection with the side of the battery pack when the battery pack is replaced sideways. The protective plate protects the lower side of the electrical connector from damage or interference by obstacles. The positioning mark arranged on the side of the cantilever beam can identify the body position of the electric vehicle, thereby ensuring that battery replacement equipment such as forks or shuttles can accurately locate and pick up the battery pack.

[0055] An electric vehicle comprises a vehicle beam, a battery pack and the quick-change bracket as described above, wherein the quick-change bracket is connected to the vehicle beam, and the battery pack is locked to the quick-change bracket.

[0056] In this solution, the electric vehicle adopts the above-mentioned quick-change bracket, which reduces the space occupied by the quick-change bracket in the X direction of the electric vehicle and saves the space occupied by the circuit in the X direction, thereby reserving sufficient lateral space to facilitate lateral battery replacement of the electric vehicle and improve the lateral battery replacement efficiency.

[0057] The positive progressive effect of the present utility model is that the quick-change bracket and the electric vehicle including the quick-change bracket adopt the above-mentioned quick-change bracket, and the locking mechanism is set on the front and rear cantilever beams, and locked or unlocked along the width direction (i.e., the Y direction) of the electric vehicle to reduce the space occupied by the quick-change bracket in the length direction (X direction) of the electric vehicle and save the space occupied by the circuit in the X direction, so that sufficient lateral space can be reserved to facilitate lateral battery replacement of the electric vehicle, thereby improving the battery replacement efficiency of lateral battery replacement; in addition, locking or unlocking along the width direction (i.e., the Y direction) of the electric vehicle can avoid the locking mechanism occupying the path for the battery replacement equipment to take and place the battery pack, thereby further improving the battery replacement efficiency of lateral battery replacement; in addition, the battery pack removal and placement path is consistent with the locking path, that is, both are along the Y direction, which is conducive to improving the battery replacement efficiency of lateral battery replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 This is a structural schematic diagram of the quick-change bracket, battery pack and vehicle beam assembly of Example 1 of the utility model.

[0059] Figure 2 This is a schematic structural diagram of the quick-change bracket and the vehicle beam assembly of Example 1 of the utility model (from a top view).

[0060] Figure 3 This is a structural schematic diagram of the quick-change bracket and the vehicle beam assembly of Example 1 of the utility model (looking from above).

[0061] Figure 4 It is a schematic structural diagram of the locking beam and the portion connected to the vehicle beam of Example 1 of the utility model (viewpoint one, the shielding plate on the outer surface of the locking beam facing away from the battery pack is removed).

[0062] Figure 5 It is a schematic structural diagram of the locking beam and the portion connected to the vehicle beam of Example 1 of the utility model (viewpoint 2, retaining the shielding plate on the inner surface of the locking beam facing the battery pack).

[0063] Figure 6 This is a schematic structural diagram of the connection portion connected to the locking beam in Example 1 of the utility model.

[0064] Figure 7 This is a schematic structural diagram of the locking mechanism of Example 1 of the utility model.

[0065] Figure 8 This is a schematic diagram of the internal structure of the locking beam of Example 1 of the utility model.

[0066] Fig. 9 This is another schematic diagram of the internal structure of the locking beam of Example 1 of the utility model.

[0067] Fig.10It is a schematic diagram of the top structure of the locking mechanism of Example 1 of the utility model.

[0068] Fig.11 This is a schematic structural diagram of a protection box of an electrical connector according to Embodiment 1 of the utility model.

[0069] Fig.12 This is a schematic diagram of the structure of the battery pack of Example 2 of the present utility model.

[0070] Fig.13 This is a schematic diagram of the structure of the battery pack of Example 2 of the utility model after removing the end panel of the lower battery body.

[0071] Description of reference numerals:

[0072] Quick-change bracket 1, front cantilever beam 10, rear cantilever beam 20, longitudinal reinforcement connector 30, transverse reinforcement connector 40, end 100, center beam 200, locking beam 300, inspection port 301, sealing plate 303, shielding plate 304, top surface 305, bottom surface 306, positioning mark 307, connector 308, side plate 3081, top plate 3082, bottom plate 3083, avoidance member 309, avoidance space 310, reinforced connection structure 312, support beam 313, reinforcement beam 314, first reinforcement member 315, second reinforcement member 316, locking mechanism 400, primary locking mechanism 410, primary lock base 420, opening 4211, cavity 4212, primary locking linkage 430, lock link 431, primary elastic member 432, primary lock tongue 433, primary elastic member fixing seat 434, secondary locking mechanism 460, secondary lock base 470, secondary locking linkage 480, secondary elastic member 481, secondary lock rod 482, secondary lock tongue 483, protective box 50 of electrical connector, square hole 51, honeycomb hole 52, battery pack 2, upper battery body 21, lower battery body 22, step 23, locking member 24, unlocking rod 25, vehicle beam 3, width direction Y of electric vehicle, length direction X of electric vehicle. DETAILED DESCRIPTION

[0073] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0074] Example 1

[0075] The present embodiment provides a quick-change bracket 1, which is used to be installed on the beam 3 of the electric vehicle to fix the battery pack 2, and the beam 3 is arranged along the length direction of the electric vehicle (i.e., the X direction). In this embodiment, the X direction is the driving direction of the electric vehicle. Specifically, the quick-change bracket 1 is arranged at the chassis position of the vehicle body to connect with the beam 3, and the quick-change bracket 1 is used to fix the battery pack 2 to ensure that the battery pack 2 can stably supply power to the electric vehicle. The battery pack 2 is located at the lower end of the quick-change bracket 1 and is locked on the quick-change bracket 1 by a detachable connection, and then the quick-change bracket 1 is used to realize a detachable connection with the vehicle body to realize the replacement of the battery pack 2. During the battery replacement process, the battery replacement equipment moves laterally to both sides of the beam 3 and enters the chassis position of the electric vehicle, and installs and removes the battery pack 2 from the bottom of the electric vehicle, thereby installing the battery pack 2 on the quick-change bracket 1, or removing the battery pack 2 from the quick-change bracket 1, to realize the lateral battery replacement operation of the electric vehicle.

[0076] like Figure 1 As shown, the quick-change bracket 1 includes a cantilever beam and a locking mechanism 400. The cantilever beam includes a front cantilever beam 10 and a rear cantilever beam 20 extending along the width direction (i.e., the Y direction) of the electric vehicle; the locking mechanism 400 is respectively arranged on the front cantilever beam 10 and the rear cantilever beam 20, and the locking mechanism 400 is used to lock or unlock the battery pack 2 arranged on the side of the vehicle beam 3 along the width direction of the electric vehicle. Specifically, the front cantilever beam 10 and the rear cantilever beam 20 are parallel to each other and arranged on the vehicle beam 3 at intervals, and the front cantilever beam 10 and the rear cantilever beam 20 both extend along the width direction (i.e., the Y direction) of the electric vehicle. The locking mechanism 400 is respectively arranged at the lower ends of the front cantilever beam 10 and the rear cantilever beam 20 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 (X direction) of the electric vehicle and saves the space occupied by the circuit in the X direction by arranging the locking mechanism 400 on the front and rear cantilever beams and locking or unlocking the quick-change bracket 1 in the width direction (X direction) of the electric vehicle, thereby saving the space occupied by the circuit in the X direction, thereby reserving sufficient lateral space for lateral battery replacement of the electric vehicle and improving the battery replacement efficiency of lateral battery replacement. In addition, locking or unlocking the quick-change bracket 1 in the width direction (Y direction) of the electric vehicle can avoid the locking mechanism occupying the path for the battery replacement equipment (not shown) 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 along the Y direction, which is conducive to improving the battery replacement efficiency of lateral battery replacement.

[0077] In this embodiment, the electric vehicle has two parallel beams 3, and there are four locking mechanisms 400, which are divided into two pairs, corresponding to the battery packs 2 on both sides of the two beams 3. In other embodiments, the number of beams can be adjusted accordingly according to the type and specific structure of the vehicle, and the number of locking mechanisms 400 can also be adjusted accordingly according to the specific arrangement structure of the quick-change bracket on the vehicle and the number of mounted battery packs.

[0078] like Figure 2 and Figure 3 As shown, the front and rear cantilever beams span the vehicle beam 3, and the front cantilever beam 10 and the rear cantilever beam 20 are both connected to the vehicle beam 3. In the width direction of the electric vehicle, at least the ends of the front cantilever beam 10 and the rear cantilever beam 20 on the same side extend out of the vehicle beam 3, and the locking mechanism 400 is arranged on the ends 100 of the front cantilever beam 10 and the rear cantilever beam 20 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 beams 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. As shown in FIG. Figure 2 As shown, the middle part of the front cantilever beam 10 or the rear cantilever beam 20 is mounted on the vehicle beam 3 and is located at the "inner position" between the two vehicle beams 3, and the two ends (i.e., the end 100) of the front cantilever beam 10 or the rear cantilever beam 20 are connected to the vehicle beam 3 and are located at the "outer position" of the two vehicle beams 3. "The end on the same side" refers to the end 100 located on the same side of the two vehicle beams 3. In this embodiment, a locking mechanism 400 is provided on the end 100 on both sides of the two vehicle beams 3. The quick-change bracket 1 provided in this embodiment is provided with a locking mechanism 400 at the end 100 of the front and rear cantilever beams 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 400. In addition, the locking mechanism 400 is installed on the cantilever beams at the front and rear ends of the quick-change bracket 1, so that the force at the front and rear ends of the quick-change bracket 1 is balanced, which is conducive to improving the stability of the quick-change bracket 1 carrying the battery pack 2.

[0079] like Figure 2 As shown, the front and rear cantilever beams each include a locking beam 300 disposed on at least one side of the vehicle beam 3, that is, the locking beam 300 is located at the end 100 of the front and rear cantilever beams, and the locking beam 300 is used to accommodate the locking mechanism 400, and is connected to the battery pack 2 through the locking mechanism 400. In the structure of the quick-change bracket 1, by arranging the locking mechanism 400 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. Figure 2 and Figure 3As shown, in this embodiment, each cantilever beam includes two locking beams 300, and the two locking beams 300 are symmetrically arranged relative to the vehicle beam 3, and each locking beam 300 is connected to the vehicle beam 3 at one end close to the vehicle beam 3 along the width direction of the electric vehicle. In addition, each cantilever beam also includes a center beam 200, that is, along the width direction of the electric vehicle, each cantilever beam includes a central beam 200 in the middle and locking beams 300 arranged on both sides of the center beam 200, and the center beam 200 is a sheet metal structure, which is straddled on the vehicle beam 3 and connected to the vehicle beam 3. The quick-change bracket 1 provided in this embodiment balances the forces on both sides of the vehicle beam 3 by symmetrically arranging the two locking beams 300 relative to the vehicle beam 3, so that the overall structure of the quick-change bracket 1 is stable. By having the center beam 200 straddled on the vehicle beam 3 and connected to the vehicle beam 3, the connection strength of the quick-change bracket 1 between the two vehicle beams 3 is enhanced. The height of the center beam 200 is higher than the vehicle beam 3, and the top surface of the locking beam 300 is inclined downward from the connection with the vehicle beam 3 to the outer side away from the vehicle beam 3, so that the front cantilever beam 10 and the rear cantilever beam 20 form a structure with a high middle and low ends.

[0080] like Figure 2 As shown, the quick-change bracket 1 includes a fixing mechanism straddling the vehicle beam 3, and the fixing mechanism includes a first connecting beam 30 and a reinforcing beam 40, wherein the first connecting beam 30 is connected between the front cantilever beam 10 and the rear cantilever beam 20 to define the relative position between the front cantilever beam 10 and the rear cantilever beam 20. The reinforcing beam 40 is connected between the first connecting beam 30 and the vehicle beam 3 to reinforce the frame structure formed by the first connecting beam 30 and the front cantilever beam 10 and the rear cantilever beam 20. Specifically, the fixing mechanism includes two first connecting beams 30 symmetrically arranged on both sides of the vehicle beam 3, and the two first connecting beams 30 both extend along the length direction of the electric vehicle. The locking beams 300 located on the same side of the front cantilever beam 10 and the rear cantilever beam 20 are connected by the first connecting beam 30 to define the relative position between the front and rear locking beams 300; the middle of the two first connecting beams 30 is connected by a reinforcing beam 40 to enhance the connection stability of the front and rear locking beams 300. The reinforcement beam 40 is parallel to the front cantilever beam 10 and the rear cantilever beam 20, and is connected to the two vehicle beams 3. The stability of the quick-change bracket 1 is further increased by the first connecting beams 30 on both sides and the reinforcement beam 40 in the middle area.

[0081] In other embodiments, due to the need to cooperate with other components of the vehicle, the specific structure of the front cantilever beam 10 and the rear cantilever beam 20 may also adopt an asymmetric manner. However, as in the present embodiment, the quick-change bracket 1 adopts a symmetrical arrangement, which is beneficial to the overall force balance and structural stability. It should be noted that the "symmetrical arrangement" here means that the front cantilever beam 10 or the rear cantilever beam 20 is a symmetrical structure relative to the vehicle beam 3, and does not mean that there is a symmetrical structure between the front cantilever beam 10 and the rear cantilever beam 20. Since the components arranged at the front and rear ends of the car are different, the structures of the front cantilever beam 10 and the rear cantilever beam 20 are mostly different.

[0082] like Figure 4-6 As shown, the locking beam 300 is a hollow structure, and the locking mechanism 400 is arranged inside the locking beam 300, that is, the locking mechanism 400 is installed in this hollow structure to reduce the space occupied by the locking mechanism 400 in the height direction of the electric vehicle, so that sufficient vertical space can be reserved for installing the battery pack 2, and the locking mechanism 400 is also protected from external damage or interference. The locking mechanism 400 includes a lock base and a locking linkage. The lock base is fixed on the locking beam 300, and the locking linkage is rotatably connected to the lock base to lock or unlock the battery pack 2; the upper end of the lock base is arranged inside the locking beam 300 and connected to the locking beam 300, and the lower end of the lock base is arranged outside the locking beam 300 and is used to cooperate with the locking member on the battery pack 2; the lock base is provided with an opening and a cavity extending from the opening, and the opening is used for the locking member of the battery pack 2 to enter the cavity, and the locking linkage moves relative to the lock base to open or close the opening to change between the unlocked state and the locked state. The locking mechanism 400 adopts the above-mentioned settings at the upper and lower ends of the lock base to realize two connections, namely the connection between the lock base and the quick-change bracket 1 (body bracket), and the connection between the lock base and the battery pack 2, so that the battery pack 2 can be hung on the quick-change bracket 1.

[0083] like Figure 7-10 As shown, the structure of the locking mechanism 400 is shown. The locking mechanism 400 includes two-stage locking mechanisms, namely a primary locking mechanism 410 and a secondary locking mechanism 460. Each stage of the locking mechanism includes a lock base and a locking linkage. The secondary locking mechanism 460 is used to provide a secondary locking or locking protection function for the battery pack 2 to prevent the battery pack 2 from falling when the primary locking mechanism 410 fails. In this embodiment, the locking mechanism 400 adopts a two-stage locking mechanism form to achieve locking or unlocking of the battery pack 2, and a double locking insurance is achieved through the secondary locking mechanism 460, thereby improving the reliability of the locking function. In other embodiments, the number of levels of the locking mechanism 400 can be adjusted accordingly according to the needs of the specific structure, and the number of its lock base and locking linkage will also be adjusted accordingly.

[0084] Specifically, in the two-stage locking mechanism structure of the present embodiment, the primary locking mechanism 410 includes two primary lock bases 420 and a primary locking linkage 430, the primary lock base 420 is fixed on the locking beam 300, the primary locking linkage 430 spans over the two primary lock bases 420, and is rotatably connected to the two primary lock bases 420. The secondary locking mechanism 460 includes a secondary lock base 470 and a secondary locking linkage 480, the secondary lock base 470 is fixed on the locking beam 300, and the secondary locking linkage 480 is rotatably connected to the secondary lock base 470; thereby, the locking linkages of the two stages are both rotatably connected to the lock base to lock or unlock the battery pack. In the locking mechanism 400, the locking linkages of each stage are rotatably connected to the lock base, realizing a way of locking or unlocking the battery pack.

[0085] Among them, Figure 8 and Fig. 9 As shown, the structural coordination between each level of the locking mechanism lock and the locking beam 300 is specifically that the upper end of the first-level lock base 420 is arranged inside the hollow structure of the locking beam 300, connected to the locking beam 300, and the lower end of the first-level lock base 420 is arranged outside the locking beam 300 and is used to cooperate with the locking member 24 on the battery pack 2; similarly, the upper end of the second-level lock base 470 is also arranged inside the hollow structure of the locking beam 300, connected to the locking beam 300, and the lower end of the second-level lock base 470 is arranged outside the locking beam 300 and is used to cooperate with the locking member 24 on the battery pack 2.

[0086] Among them, Figure 7 As shown, the primary lock base 420 is provided with an opening 4211 and a cavity 4212 extending from the opening 4211, and the primary locking linkage 430 can move horizontally relative to the primary lock base 420 to open or close the opening 4211 of the primary lock base 420, so that the locking member 24 of the battery pack can enter or exit the cavity 4212, thereby changing the primary locking mechanism 410 between the unlocked state and the locked state. Similarly, the secondary lock base 470 is also provided with an opening 4211 and a cavity 4212 extending from the opening 4211; the secondary locking linkage 480 can move horizontally relative to the secondary lock base 470 to open or close the opening 4211 of the secondary lock base 470, so that the locking member 24 of the battery pack can enter or exit the cavity 4212, thereby changing the secondary locking mechanism 460 between the unlocked state and the locked state. The locking mechanism 400 allows the locking member 24 of the battery pack 2 to have room to move to achieve locking / unlocking operations through the cavity 4212 of the lock base. The locking linkage moves relative to the lock base to open or close the opening 4211, so that the locking member 24 of the battery pack 2 can be controlled to enter the cavity 4212 in the locked state and leave the cavity 4212 in the unlocked state, thereby achieving locking or unlocking operations.

[0087] Furthermore, in the structure of the primary locking mechanism 410, the primary locking linkage 430 includes a locking rod 431 and at least one primary locking tongue 433; the primary locking mechanism 410 includes at least one primary lock base 420, and the locking rod 431 is rotatably connected to at least one primary locking tongue 433, which is used to drive the primary locking tongue 433 to rotate, so that the primary locking tongue 433 can rotate relative to the primary lock base 420 to change between an unlocked state and a locked state.

[0088] Specifically, Figure 7-10 As shown, in this embodiment, the primary locking mechanism 410 includes two locks, and correspondingly, the primary locking linkage 430 includes two primary locking tongues 433 and two primary lock bases 420. The two primary locking tongues 433 and the two primary lock bases 420 are paired to form two locks. The same locking link 431 is rotatably connected to the two primary locking tongues 433. One end of each primary locking tongue 433 is rotatably connected to the primary lock base 420, and the other end is rotatably connected to the locking link 431. The horizontal movement of the same locking link 431 can drive the two primary locking tongues 433 to rotate synchronously, so that the primary locking tongue 433 can rotate relative to the primary lock base 420 to change between the unlocked state and the locked state. Specifically, the primary locking tongue 433 is rotated to open the door. The opening 4211 of the primary lock base 420 controls the locking member 24 on the battery pack 2 to enter the cavity 4212 from the opening 4211, and the locking member 24 is stuck in the cavity 4212 by the primary lock tongue 433, and then the opening 4211 is closed, thereby locking the battery pack 2; or, by rotating the primary lock tongue 433, the opening 4211 of the primary lock base 420 is opened, and the locking member 24 on the battery pack 2 is controlled to disengage from the cavity 4212, thereby unlocking the battery pack 2.

[0089] In other embodiments, if the primary locking mechanism 410 has only one lock, it has only one pair of lock bases and lock tongues, that is, there is only one primary lock base 420 and one primary lock tongue 433. At this time, there is also only one lock base connected to the lock link 431.

[0090] Further, the primary locking linkage 430 also includes a primary elastic member 432, which is a spring. The primary elastic member 432 is arranged between the two primary lock bases 420, and the primary elastic member 432 is arranged on the cantilever beam, and the two ends of the primary elastic member 432 are respectively connected to the lock link 431 and the cantilever beam. Specifically, the primary locking mechanism 410 also includes a primary elastic member fixing seat 434, which is fixed on the locking beam 300 of the cantilever beam and is located between the two primary lock bases 420, and the two ends of the primary elastic member 432 are respectively connected to the lock link 431 and the primary elastic member fixing seat 434, so as to realize the connection between the primary elastic member 432 and the cantilever beam, so as to realize the reset of the lock link 431. At the same time, the cantilever beam applies a traction force to the lock link 431 through the primary elastic member fixing seat 434 and the primary elastic member 432, so as to prevent the lock link 431 from being in an unlocked state due to the bumping of the vehicle during the driving process.

[0091] Furthermore, if Fig.10 As shown, this embodiment includes two primary elastic members 432 and two primary elastic member fixing seats 434. The two primary elastic members 432 are respectively arranged on both sides of the lock link 431 in the length direction X of the electric vehicle, and the two primary elastic member fixing seats 434 are respectively arranged on both sides of the lock link 431 in the length direction X of the electric vehicle. The two primary elastic members 432 and the two primary elastic member fixing seats 434 are connected one by one to improve the resetting ability of the lock link 431.

[0092] In other alternative embodiments, the primary elastic member fixing seat 434 may not be directly fixed on the locking beam 300 , but may be directly fixed on the primary lock base 420 .

[0093] In other alternative embodiments, the primary elastic member fixing seat 434 may not be provided, and the primary elastic member 432 is provided on at least one primary lock base 420. In this state, one end of the primary elastic member 432 is connected to the lock link 431, and the other end of the primary elastic member 432 is directly connected to the primary lock base 420, so that the primary lock base 420 applies a traction force to the lock link 431 through the primary elastic member 432 to prevent the lock link 431 from being in an unlocked state due to the bumps of the vehicle during driving. Fig. 9 As shown, the primary elastic member 432 can be connected to one of the two primary lock bases 420 driven by the lock link 431.

[0094] Furthermore, if Figure 7-10As shown, in the structure of the secondary locking mechanism 460, the secondary locking linkage 480 includes a secondary locking rod 482 and a secondary locking tongue 483; one end of the secondary locking tongue 483 is rotatably connected to the secondary lock base 470, and the other end is rotatably connected to the secondary locking rod 482; the horizontal movement of the secondary locking rod 482 drives the secondary locking tongue 483 to rotate, so that the secondary locking tongue 483 rotates relative to the secondary lock base 470 to change between an unlocked state and a locked state.

[0095] Furthermore, the secondary locking linkage 480 further includes a secondary elastic member 481, which is also a spring. One end of the secondary elastic member 481 is connected to the primary lock base 420 of the primary locking mechanism 410, and the other end of the secondary elastic member 481 is connected to the secondary lock tongue 483 through the secondary lock rod 482 and acts on the secondary lock tongue 483. The secondary elastic member 481 can be elastically deformed to allow the secondary lock tongue 483 to rotate relative to the secondary lock base 470 to change between the unlocked state and the locked state. By rotating the secondary lock tongue 483, the opening 4211 of the secondary lock base 470 is closed or opened, and the locking member 24 on the battery pack 2 is controlled to enter the cavity 4212 from the opening 4211, and the locking member 24 is stuck in the cavity 4212 by the secondary lock tongue 483, and then the opening 4211 is closed, thereby locking the battery pack 2; or, by rotating the secondary lock tongue 483, the opening 4211 of the secondary lock base 470 is opened, and the locking member 24 on the battery pack 2 is controlled to be separated from the cavity 4212, thereby unlocking the battery pack 2. Therefore, the locking mechanism 400 connects the primary locking mechanism 410 and the secondary locking mechanism 460 through the secondary elastic member 481, and arranges the two-stage locking mechanism in the limited space of the locking beam 300, saving the installation space of the locking mechanism.

[0096] In the locking mechanism 400, the lock tongue is changed between the locked and unlocked states relative to the lock base through the rotational connection between the respective lock links or lock rods and the lock tongue, thereby realizing the locking or unlocking function, and realizing a way to lock or unlock the battery pack 2. Through the primary elastic member 432 and utilizing its elastic function, the primary locking mechanism 410 can be reset and keep the locked state stable during the locking process, thereby improving the locking stability. Through the secondary elastic member 481 set as above and utilizing its elastic function, the secondary locking mechanism 460 can be reset, and the two-stage locking mechanism is connected, and the two-stage locking mechanism is arranged in the limited space of the locking beam 300, saving the installation space of the locking mechanism.

[0097] Furthermore, the locking beam 300 is provided with at least one inspection opening on one end surface in the length direction of the electric vehicle and facing the outside of the quick-change bracket 1. Figure 4-6A specific structure of the locking beam 300 is shown, and a detachably connected sealing plate 303 is provided on the outer end face of the locking beam 300, and the opening after removing the sealing plate 303 can be used as an inspection port 301. It should be noted here that the "outer end face" of the locking beam 300 refers to the end face of the locking beam 300 along the length direction X of the electric vehicle and facing the outside of the quick-change bracket 1, and its "inner end face" refers to the end face of the locking beam 300 along the length direction X of the electric vehicle and facing the inside of the quick-change bracket 1. In other embodiments, the outer end face of the locking beam 300 may not have a sealing plate 303, but a maintenance port 301 is directly opened to reduce the complexity and weight of the structure. Among them, the sealing plate 303 is also provided with three detachably connected shielding plates ( Figure 4 The middle shielding plate has been removed), and any opening after removing the three shielding plates can also be used as an inspection port 301, as an inspection port 301 for inspecting the local position of the locking mechanism 400. The locking mechanism 400 is protected in the hollow structure of the locking beam 300 by the detachable sealing plate 303 and the shielding plate, and can also be used as a window for inspection function, reducing the weight of the locking beam 300.

[0098] Furthermore, the locking beam 300 is provided with at least one weight-reducing hole on one end surface facing the inside of the quick-change bracket 1 in the length direction of the electric vehicle. Figure 5 As shown, three detachably connected shielding plates 304 are provided on the inner end surface of the locking beam 300. When the three shielding plates 304 are removed, the weight of the locking beam 300 can be reduced. Therefore, the three openings corresponding to the three shielding plates 304 are all weight-reducing holes. In other embodiments, the locking beam 300 may not have weight-reducing holes on its inner end surface, but its surface and other parts of the locking beam 300 are made into an integral structure, which reduces the processing steps, saves manufacturing costs, and is also beneficial to the strength of the locking beam 300. In the structure of the locking beam 300, the inspection port 301 and the weight-reducing holes (i.e., the openings corresponding to the three shielding plates on the inner end surface of the locking beam 300) are respectively arranged on the two opposite end surfaces of the locking beam 300 along the length direction of the electric vehicle. The locking beam 300 is convenient for maintenance of the locking mechanism 400 through the inspection port 301; and the inspection port 301 is arranged on the outer end surface facing the quick-change bracket 1 in the length direction, which is convenient for maintenance personnel standing outside to perform maintenance operations; at the same time, the inspection port 301 also reduces the weight of the locking beam 300. The weight-reducing holes provided by the above structure reduce the weight of the locking beam 300. The inspection port 301 and the weight-reducing holes are respectively arranged on two opposite end surfaces, thereby achieving the purpose of maintenance function and weight reduction at the same time.

[0099] After removing the three shielding plates on the outer surface of the locking beam 300, the inspection port 301 formed connects the inside and outside of the locking beam 300 and is set corresponding to the locking mechanism 400 to avoid the inability to reach the locking mechanism 400 for inspection. At least one end surface of the locking beam 300 along the longitudinal direction X of the electric vehicle is detachably connected with at least one sealing plate 303, and the sealing plate 303 is used as an inspection port or a weight reduction hole. Specifically, Figure 4 and Figure 5 As shown, in this embodiment, a detachably connected sealing plate 303 is installed on both side end faces of the locking beam 300 along the length direction X of the electric vehicle, and both sealing plates 303 can be used as weight-reducing holes, wherein the sealing plate 303 on the outer end face can be used as an inspection port after being removed. In other embodiments, the inner end face of the locking beam 300 facing the battery pack 2 may also be free of a sealing plate 303, and its inner end face and the other parts of the locking beam 300 are an integral structure, which reduces the processing steps, saves manufacturing costs, and is also conducive to improving the strength of the locking beam 300. In the structure of the locking beam 300, the inspection port 301 is arranged corresponding to the locking mechanism 400 to avoid being unable to reach into the locking mechanism 400 for inspection. The locking mechanism 400 is protected in the hollow structure of the locking beam 300 by the detachable sealing plate 303, and can also be used as a window for inspection function, or to block the weight-reducing hole.

[0100] like Figure 4 As shown, the locking beam 300 further includes a top surface 305 and a bottom surface 306, and the top surface 305 is inclined toward the bottom surface 306 along the width direction. Such an inclined structure, on the one hand, reduces the material weight of the maintenance compartment, and on the other hand, leaves space above the top surface 305 for installing other components of the vehicle.

[0101] Furthermore, the quick-change bracket 1 further includes a connecting member 308, the connecting member 308 is connected to the vehicle beam 3, the locking beam 300 is sleeved on the connecting member 308 and connected to the connecting member 308, specifically, as Figure 4-6 As shown, the connecting member 308 includes two side plates 3081, a top plate 3082, a bottom plate 3083 and a plurality of connecting pins connecting the two side plates 3081. The two side plates 3081 are arranged at intervals along the length direction of the electric vehicle, the top plate 3082 and the bottom plate 3083 are arranged at intervals along the height direction of the electric vehicle, and the two side plates 3081 are connected to the top plate 3082 and the bottom plate 3083 respectively to form a rectangular structural frame. The four inner walls of the locking beam 300 are sleeved with the outer surface of the rectangular structural frame of the connecting member 308 and connected, which increases the connection area between the two and improves the connection effect between the two.

[0102] Furthermore, the quick-change bracket 1 further includes an avoidance member 309, which is specifically a relatively thick sheet metal bending member. The avoidance member 309 and the connecting member 308 are mutually sleeved, and the avoidance member 309 is connected to the locking beam 300. Figure 2 As shown, the avoidance member 309 is bent into a rectangular frame structure, so that along the width direction of the electric vehicle, the avoidance member 309 protrudes toward the locking beam 300 to form a hollow avoidance space 310 at the end away from the locking beam 300.

[0103] The locking beam 300 is connected to the connecting member 308 in a sleeved manner, which is conducive to improving the connection strength and reliability. Through the avoidance member 309 of the above structure, a hollow avoidance space 310 is formed at the connection between the locking beam 300 and the vehicle beam 3 to avoid conflict with other components of the vehicle beam 3. The avoidance member 309 and the connecting member 308 are sleeved with each other, and the avoidance member 309 is connected to the locking beam 300, so that the locking beam 300 can form the avoidance space 310 while being connected to the vehicle beam 3, and the two do not conflict.

[0104] Furthermore, the quick-change bracket 1 also includes a reinforcement connection structure 312, and the locking beam 300 is connected to the reinforcement connection structure 312 through a connector 308. In this embodiment, the reinforcement connection structure 312 specifically includes a stacked support beam 313 and a reinforcement beam 314, the support beam 313 is a relatively large sheet metal bending plate, and is relatively thick, the support beam 313 is fixed to the vehicle beam 3, the top plate 3082 of the connector 308 and the upper ends of the two side plates 3081 are fixed to one end face of the support beam 313 in the width direction of the electric vehicle, and the lower ends of the two side plates 3081 and the bottom plate 3083 are connected to the avoidance member 309. Since the locking beam 300 and the support beam 313 extend in different directions, the locking beam 300 is indirectly connected to the support beam 313 through the connector 308, which can reduce the difficulty of connecting the two. The reinforcement beam 314 is also a relatively large and thick sheet metal bending plate, presenting an open rectangular frame structure. And the reinforcing beam 314 is connected to the upper surface of the vehicle beam 3, and is connected to the center beam 200 and the support beam 313. The locking beam 300 is connected to the vehicle beam 3 through the connecting piece 308 and the reinforcing connecting structure 312 composed of the support beam 313 and the reinforcing beam 314. The reinforcing connecting structure 312 is used to strengthen the connection strength between the locking beam 300, the connecting piece 308 and the vehicle beam 3, so that the locking beam 300 has a better ability to withstand the impact of locking or unlocking operations.

[0105] Furthermore, the upper half of the support beam 313 along the height direction of the electric vehicle is connected to the reinforcement beam 314, and is connected to the center beam 200 through the reinforcement beam 314, while the lower half is connected to the vehicle beam 3. The support beam 313 is connected to the reinforcement beam 314 and the vehicle beam 3 through its upper and lower halves, respectively, which improves the connection strength between the locking beam 300 in the suspended state and the center beam 200 and the vehicle beam 3, thereby facilitating the stability of the locking mechanism 400 when locking / unlocking.

[0106] like Figure 2 , 4 As shown, the direction relationship of the arrangement of each connecting component is that the connecting member 308 is fixed to one end face of the reinforcement connection structure 312 along the width direction of the electric vehicle. Among them, the avoidance member 309 is connected to the reinforcement connection structure 312 along the width direction of the electric vehicle; along the width direction of the electric vehicle, the avoidance member 309 protrudes from the end face connected to the reinforcement connection structure 312 in the direction close to the locking beam 300, and the end of the avoidance member 309 away from the locking beam 300 forms a hollow avoidance space 310. The quick-change bracket 1 fixes the connecting member 308 to one end face of the reinforcement connection structure 312 along the width direction, adapts to the form of the locking mechanism 400 being arranged along the width direction, and the connecting member 308 and the reinforcement connection structure 312 are connected to the locking beam 300 from two different directions respectively, thereby improving the connection strength. Through the avoidance member 309 of the above structure, an avoidance space is formed on the outside of the reinforcement connection structure 312 toward the locking beam 300.

[0107] like Figure 4 As shown, the quick-change bracket 1 further includes a first reinforcement member 315, which is a triangular sheet metal structure member, disposed outside the locking beam 300, and connected to the support beam 313 and the locking beam 300, respectively, for reinforcing the connection between the support beam 313 and the locking beam 300. The first reinforcement member 315 enhances the connection strength between the locking beam 300 and the reinforcing connection structure 312.

[0108] like Figure 2-6 As shown, each locking beam 300 on both sides of the vehicle beam 3 is provided with a reinforcing connection structure 312 consisting of a support beam 313 and a reinforcing beam 314, and the locking beam 300 is connected to the vehicle beam 3 through the reinforcing connection structure 312 on the corresponding side. Among them, the two ends of the center beam 200 in the width direction of the electric vehicle are respectively connected to the reinforcing beam 314 of the reinforcing connection structure 312 on the corresponding side.

[0109] Furthermore, if Figure 2As shown, the quick-change bracket 1 also includes a second reinforcement member 316, which is also a triangular sheet metal structure member, disposed outside the center beam 200; and connected to the reinforcement beam 314 and the center beam 200, respectively, for reinforcing the connection between the reinforcement connection structure 312 and the center beam 200. The second reinforcement member 316 is connected to both ends of the center beam 200. The quick-change bracket 1 improves the structural stability of the inner side of the vehicle beam 3 through the second reinforcement member 316. At the same time, fasteners are connected to the upper and lower surfaces of the center beam 200 to enhance the overall structural strength.

[0110] In this embodiment, the support beam 313, the reinforcing beam 314, the connecting member 308, the avoiding member 309 and the locking beam 300 are connected to each other by multiple large bolts, which further improves the connection strength and increases the structural stability.

[0111] like Figure 3 , 11 As shown, the quick-change bracket 1 also includes an electrical connector. The electrical connector (not shown in the figure) is arranged below the beam 3 along the width direction of the electric vehicle. The electrical connector is used to electrically connect to the battery pack 2. The electrical connector is installed on the electrical connector protection box. The protection box is divided into two parts that are symmetrical on the left and right. The two parts are connected by a horizontal connecting plate. A square hole 51 is provided in the lower half of each side of the protection box. The electrical connector is inserted into the square hole 51, and the upper half of the protection box is connected to the vehicle. There are also a number of honeycomb holes 52 on the protection box to reduce the weight of the protection box. The electrical connector is protected by the protection box. The lower half of the protection box is connected to the electrical connector, and the upper half is connected to the beam 3. The electrical connector is located below the beam 3 to avoid interference with other components of the beam 3, which is beneficial to the routing of the electrical connector. Among them, a protective plate (not shown in the figure) is provided on the lower side of the electrical connector. The protective plate protects the lower side of the electrical connector from damage or interference.

[0112] like Figure 4 As shown, at least one side of the front cantilever beam 10 and the rear cantilever beam 20 in the width direction of the electric vehicle is provided with a positioning mark 307. Through the positioning mark 307, the body position of the electric vehicle can be identified, thereby ensuring that the battery replacement equipment such as the fork or shuttle can accurately locate and pick up the battery pack 2. In other embodiments, positioning marks 307 can also be provided on both sides of the front cantilever beam 10 and / or the rear cantilever beam 20 in the width direction of the electric vehicle to improve the positioning accuracy. The quick-change bracket 1 sets the electrical connector below the beam 3 along the width direction of the electric vehicle (i.e., the Y direction), reducing the space occupied along the length direction of the electric vehicle (i.e., the X direction). Only enough distance needs to be reserved in the Y direction for battery replacement, saving the space occupied by the circuit in the X direction, and also facilitating the alignment and connection with the side of the battery pack 2 when the battery pack 2 is replaced laterally.

[0113] Example 2

[0114] This embodiment provides an electric vehicle, which includes two beams 3 arranged in parallel along the length direction of the electric vehicle, a battery pack 2 and a quick-change bracket 1 as in Example 1, wherein the quick-change bracket 1 is connected to the beam 3, and the battery pack 2 is locked to the quick-change bracket 1.

[0115] During the battery replacement process, the battery replacement equipment moves laterally to both sides of the vehicle beam 3 and enters the chassis position of the electric vehicle, and installs and removes the battery pack 2 from the bottom of the electric vehicle, thereby installing the battery pack 2 on the quick-change bracket 1, or removing the battery pack 2 from the quick-change bracket 1 to realize the battery replacement operation of the electric vehicle.

[0116] like Figure 12-13 As shown, the structure of the battery pack 2 matched with the locking mechanism 400 is shown. The battery pack 2 includes an upper battery body 21 and a lower battery body 22. Along the length direction of the electric vehicle, the length of the upper battery body 21 is less than the length of the lower battery body 22, so the part of the lower battery body 22 exceeding the upper battery body 21 forms a step 23, and the surface of the step 23 is provided with a locking member 24. When the locking operation is performed, the battery pack 2 is moved to the bottom of the locking beam 300, and then the battery pack 2 rises and moves toward the vehicle beam 3 on the inner side of the electric vehicle along the width direction of the electric vehicle, so that the locking member 24 pushes the locking tongue of the locking mechanism 400 and enters the cavity 4212 in the lock base, and the locking tongue closes the opening 4211 of the lock base to complete the locking.

[0117] A plurality of unlocking rods 25 are provided on the side of the lower battery body 22 along the width direction, and the unlocking rods 25 are penetrated through the locking member 24. When performing the unlocking operation, the unlocking rod 25 lifts the locking linkage member of the locking mechanism 400 to rotate the lock tongue, open the opening 4211 of the lock base, and allow the locking member 24 to be disengaged from the cavity 4212, thereby completing the unlocking.

[0118] By adopting the above-mentioned quick-change bracket 1, the electric vehicle reduces the space occupied by the quick-change bracket 1 in the X direction of the electric vehicle and saves the space occupied by the circuit in the X direction, so that sufficient lateral space can be reserved to facilitate lateral battery replacement of the electric vehicle, thereby improving the battery replacement efficiency of lateral battery replacement.

[0119] 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 and a locking mechanism, wherein the cantilever beam includes a front cantilever beam and a rear cantilever beam extending along the width direction of the electric vehicle; The locking mechanism is arranged on the front cantilever beam and the rear cantilever beam, and is used to lock or unlock the battery pack arranged on the side of the beam along the width direction of the electric vehicle.

2. The quick-change bracket according to claim 1, characterized in that: The front cantilever beam and the rear cantilever beam are both connected to the vehicle beam; 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 arranged at the ends of the front cantilever beam and the rear cantilever beam extending out of the vehicle beam.

3. 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, and the locking beam is used to arrange the locking mechanism and is connected to the battery pack through the locking mechanism.

4. The quick-change bracket according to claim 3, characterized in that: The locking beam is a hollow structure, and the locking mechanism is arranged inside the locking beam.

5. The quick-change bracket according to claim 4, characterized in that: The locking mechanism includes a lock base and a locking linkage, the lock base is fixed on the locking beam, and the locking linkage is rotatably connected to the lock base to lock or unlock the battery pack.

6. The quick-change bracket according to claim 5, characterized in that: The upper end of the lock base is arranged inside the locking beam and connected to the locking beam, and the lower end of the lock base is arranged outside the locking beam and is used to cooperate with the locking member on the battery pack; And / or, the lock base is provided with an opening and a cavity extending from the opening, the opening is used for the locking member of the battery pack to enter the cavity, and the locking linkage moves relative to the lock base to open or close the opening to change between an unlocked state and a locked state.

7. The quick-change bracket according to claim 5, characterized in that: The locking mechanism includes a primary locking mechanism and a secondary locking mechanism that are interconnected. The secondary locking mechanism is used to provide a secondary locking or locking protection function for the battery pack to prevent the battery pack from falling when the primary locking mechanism fails.

8. The quick-change bracket according to claim 7, characterized in that: The locking linkage of the primary locking mechanism comprises a locking link and at least one primary locking tongue; the primary locking mechanism comprises at least one primary lock base, the locking link is rotatably connected to at least one primary locking tongue, and is used to drive the primary locking tongue to rotate, so that the primary locking tongue can rotate relative to the primary lock base to change between an unlocked state and a locked state; And / or, the locking linkage of the secondary locking mechanism includes a secondary locking rod and a secondary locking tongue; the secondary locking mechanism includes a secondary lock base; The secondary lock rod is rotatably connected to the secondary lock tongue, and is used to drive the secondary lock tongue to rotate, so that the secondary lock tongue rotates relative to the secondary lock base to change between an unlocked state and a locked state; And / or, the locking linkage of the secondary locking mechanism comprises a secondary locking rod and a secondary elastic member; the secondary locking rod of the secondary locking mechanism is connected to the lock base of the primary locking mechanism through the secondary elastic member; And / or, the locking linkage of the primary locking mechanism includes a lock link and a primary elastic member; the primary locking mechanism includes at least one primary lock base; the primary elastic member is arranged on at least one of the primary lock bases, and the two ends of the primary elastic member are respectively connected to the lock link and one of the primary lock bases; or, the primary elastic member is arranged on the cantilever beam, and the two ends of the primary elastic member are respectively connected to the lock link and the cantilever beam.

9. The quick-change bracket according to claim 4, 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; The inspection port communicates with the interior and exterior of the locking beam, and the inspection port is arranged corresponding to the locking mechanism.

10. The quick-change bracket according to claim 9, characterized in that: 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; The inspection opening 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.

11. The quick-change bracket according to claim 10, characterized in that: At least one end surface of the locking beam opposite to each other along the length direction of the electric vehicle is detachably connected with at least one sealing plate, and the sealing plate is used for the inspection opening or the weight-reducing hole.

12. The quick-change bracket according to any one of claims 3 to 11, characterized in that: The quick-change bracket also includes a connecting piece, which is connected to the vehicle beam, and the locking beam is sleeved on the connecting piece and connected to the connecting piece.

13. The quick-change bracket according to claim 12, characterized in that: The quick-change bracket also includes an avoidance member, which is socketed with the connecting member and connected to the locking beam; along the width direction of the electric vehicle, the avoidance member protrudes toward the locking beam to form a hollow avoidance space at the end away from the locking beam.

14. The quick-change bracket according to claim 12, characterized in that: The quick-change bracket also includes a reinforcing connection structure, which is fixed on the vehicle beam and connected to the connecting piece. The locking beam is connected to the vehicle beam through the connecting piece and the reinforcing connection structure, and the reinforcing connection structure is used to reinforce the connection between the locking beam and the vehicle beam.

15. The quick-change bracket according to claim 14, characterized in that: The connecting member is fixed to an end surface of the reinforcing connecting structure along the width direction of the electric vehicle; And / or, the quick-change bracket further includes an avoidance member, the avoidance member and the connecting member are mutually sleeved, and the avoidance member is connected to the locking beam; along the width direction of the electric vehicle, the avoidance member protrudes in a direction close to the locking beam to form a hollow avoidance space at an end away from the locking beam; The avoidance member is connected to the reinforcing connection structure along the width direction of the electric vehicle; along the width direction of the electric vehicle, the avoidance member protrudes from one end connected to the reinforcing connection structure toward the locking beam, and the end of the avoidance member away from the locking beam forms a hollow avoidance space; And / or, the quick-change bracket also includes a first reinforcement member, which is arranged on the outside of the locking beam; the first reinforcement member is respectively connected to the reinforcement connection structure and the locking beam, and is used to reinforce the connection between the reinforcement connection structure and the locking beam.

16. The quick-change bracket according to any one of claims 3 to 11, characterized in that: The cantilever beam includes two locking beams symmetrically arranged relative to the vehicle beam, and any one of the locking beams is connected to the vehicle beam along the width direction of the electric vehicle and close to one end of the vehicle beam.

17. The quick-change bracket according to claim 16, characterized in that: The cantilever beam further comprises 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 center beam is straddled on the vehicle beam and connected to the vehicle beam.

18. The quick-change bracket according to claim 17, characterized in that: The two locking beams are respectively connected to the two sides of the vehicle beam, and a reinforcement connection structure is provided on the corresponding side of each locking beam, and the locking beam is connected to the vehicle beam through the reinforcement connection structure on the corresponding side; and / or, the two ends of the central beam in the width direction of the electric vehicle are respectively connected to the reinforcement connection structures on the corresponding sides; And / or, the quick-change bracket also includes a second reinforcement member, which is arranged on the outside of the center beam; the second reinforcement member is respectively connected to the reinforcement connection structure and the center beam, and is used to reinforce the connection between the reinforcement connection structure and the center beam.

19. The quick-change bracket according to any one of claims 1 to 11, characterized in that: The quick-change bracket further includes an electrical connector, which is disposed below the vehicle beam along the width direction of the electric vehicle, and is used to be electrically connected to the battery pack; And / or, a protective plate is provided on the lower side of the electrical connector; And / or, a positioning mark is provided on at least one side of the cantilever beam in the width direction of the electric vehicle.

20. An electric vehicle, characterized in that: The electric vehicle comprises a vehicle beam, a battery pack and a quick-change bracket as described in any one of claims 1 to 19, wherein the quick-change bracket is connected to the vehicle beam, and the battery pack is locked to the quick-change bracket.

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