CN219214774U

CN219214774U - Power battery, quick-change bracket and electric vehicle

Info

Publication number: CN219214774U
Application number: CN202223581992.0U
Authority: CN
Inventors: 张建平; 于新瑞; 褚佳玮
Original assignee: Aulton New Energy Automotive Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-20
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a power battery, a quick-change bracket and an electric vehicle, wherein the power battery is arranged on the electric vehicle and comprises a battery frame, a battery pack and at least two rows of lock shaft assemblies which are arranged at intervals along the length direction of the electric vehicle; the battery pack is arranged inside the battery frame, the lock shaft assemblies are arranged on the battery frame, and each row of lock shaft assemblies are arranged along the width direction of the electric vehicle; the battery frame is used for moving along the width direction of the electric vehicle so as to enable the lock shaft assembly to be locked or unlocked on a locking mechanism of the electric vehicle, so that the power battery is locked or unlocked; the power battery can be unlocked or locked on the electric vehicle only by moving in the width direction of the automobile, and the operation is convenient and quick; because this direction stroke is shorter, easy dismounting, this device overall structure is simple, the easy dismounting maintenance.

Description

Power battery, quick-change bracket and electric vehicle

Technical Field

The utility model relates to the field of quick-change related batteries of electric vehicles, in particular to a power battery, a quick-change bracket and an electric vehicle.

Background

The new energy automobile develops rapidly, the electric automobile which depends on the storage battery as the driving energy has the advantages of zero emission and small noise, and the electric commercial vehicle in the electric automobile, such as an electric heavy truck and an electric light truck, also gradually appears in respective application scenes, and simultaneously, a power exchanging station for replacing the power battery of the electric truck is also built in a matched mode.

Because commercial electric vehicles such as electric trucks are great to power battery's capacity demand, present have the car of interchangeable battery, can supply electric energy for electric vehicle fast in the short time, detachable power battery need bear vibrations and the impact from electric vehicle, therefore, current power battery sets up in the inner chamber of vehicle chassis usually detachably, with the reinforcing to power battery's protection, reduce power battery and break away from electric vehicle's risk, but this kind of setting is unfavorable for dismantling fast and installing power battery, in addition, current power battery is comparatively complicated with electric vehicle chassis's connection structure, the dismouting degree of difficulty has also been increased, and connection structure on the power battery can occupy the space that is used for holding the battery package in the frame, the quantity that leads to the battery package that can hold is less, and then lead to electric vehicle's continuation of journey mileage to be short. In addition, the existing power battery additionally occupies the space on the length direction of the bottom of the girder in the process of disassembly and assembly.

Disclosure of Invention

The utility model aims to overcome the defect that a connecting structure on a power battery occupies a space for accommodating battery packs in a frame in the prior art, so that the number of the battery packs which can be accommodated is small.

The utility model provides a power battery, a quick-change bracket and an electric vehicle for solving the technical problems.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the power battery is mounted on an electric vehicle and comprises a battery frame, a battery pack and at least two rows of lock shaft assemblies which are arranged at intervals along the length direction of the electric vehicle; the battery pack is arranged inside the battery frame, the lock shaft assemblies are arranged on the battery frame, and each row of lock shaft assemblies are arranged along the width direction of the electric vehicle; the battery frame is used for moving along the width direction of the electric vehicle so as to enable the lock shaft assembly to be locked or unlocked on a locking mechanism on the electric vehicle, so that the power battery is locked or unlocked.

In the scheme, the lock shaft assembly is arranged on the battery frame, so that the lock shaft assembly does not occupy the inner space of the battery frame, the space utilization rate is high, the accommodating space and the number of battery packs are increased, and the endurance mileage of the electric vehicle is improved; the arrangement direction of the lock shaft assembly is along the width direction of the electric vehicle, so that the disassembly direction of the power battery is defined as the width direction of the automobile, the power battery can be unlocked or locked on the electric vehicle only by moving in the direction, the operation is convenient and quick, the space in the length direction of the bottom of the girder cannot be additionally occupied in the process of disassembling and installing the power battery, the impact on the power battery in the width direction of the electric vehicle is small, and the service life of the locking mechanism can be further prolonged; in addition, at least two rows of lock shaft assemblies are used for locking the power battery to the electric vehicle, so that the locking is stable, and the reliability of connection between the power battery and the electric vehicle is improved.

Preferably, at least one row of lock shaft assemblies is arranged on the edge of the battery frame.

In this scheme, because the position of locking is located the edge of battery frame, consequently, lock axle subassembly can make power battery bear bigger torsion, and locking stability is improved, has improved shock resistance.

Preferably, at least one row of lock shaft assemblies is disposed near the center of the battery frame.

In this scheme, be close to battery frame center atress more, set up at least one row of lock axle subassembly near battery frame center, increased the overall bearing capacity of lock axle subassembly, improved locking stability.

Preferably, each row of lock shaft assemblies comprises at least two groups of lock shaft assemblies, and at least one group of lock shaft assemblies is arranged on the same side of a girder of the electric vehicle.

In this scheme, the homonymy of girder sets up at least a set of lock axle subassembly, makes lock axle subassembly atress balanced to the life of extension lock axle subassembly.

Preferably, the battery frame comprises a plurality of cross beams, and the lock shaft assembly is arranged on the cross beams.

In this scheme, the crossbeam is used for supporting battery frame to strengthen battery frame's shock resistance, set up lock axle subassembly on the crossbeam, do not occupy battery frame's inner space, space utilization is high, has promoted battery package's accommodation space and quantity, has improved electric vehicle's continuation of journey mileage.

Preferably, the cross beams are arranged at intervals along the length direction of the electric vehicle, and the cross beams divide the battery frame into a plurality of battery accommodating cavities.

In this scheme, the battery holds the chamber and is used for placing the battery package, and the crossbeam is arranged along electric vehicle length direction, along electric vehicle width direction, has promoted power battery's shock resistance, also keeps having good shock resistance at electric vehicle length direction.

Preferably, the battery frame includes a plurality of stringers and is arranged at intervals in a width direction of the electric vehicle, and the stringers divide the battery frame into a plurality of battery accommodation chambers.

In this scheme, through setting up a plurality of longerons and dividing into a plurality of battery with battery frame and hold the chamber, the independence of the battery package in every battery holds the intracavity is better to the longeron has strengthened battery frame's shock resistance.

Preferably, the lock shaft assembly comprises a mounting seat and a lock shaft, the mounting seat is mounted at the top of the battery frame, two ends of the lock shaft are connected to the mounting seat, and the lock shaft is used for being matched with the locking mechanism.

In this scheme, the lock axle card can accomplish the locking in locking mechanism, and lock axle subassembly simple structure is reliable, is convenient for change and maintenance.

Preferably, the power battery further comprises a battery pack electric connector and a battery pack water-cooling connector, and the battery pack electric connector and the battery pack water-cooling connector are both arranged on one side of the battery frame.

In the scheme, the battery pack electric connector and the battery pack water-cooling connector are positioned in the moving direction of the power battery pack, so that the power battery can be connected with the battery pack electric connector and the battery pack water-cooling connector in a moving process, and the connecting process is convenient and quick.

Preferably, the power battery further comprises a supporting plate and a plurality of additional battery packs, the supporting plate is arranged at the top of the battery frame and forms a double-layer structure with the battery frame, the supporting plate is used for bearing the additional battery packs at the upper layer, and the additional battery packs are arranged along the length direction of the electric vehicle.

In the scheme, the double-layer structure design is adopted, the space is fully utilized, the total capacity of the battery is increased, and the single-charging driving mileage of the electric automobile is prolonged.

The quick-change bracket is used for being connected to a girder of an electric vehicle to mount a power battery, and comprises a bracket body and at least two rows of locking mechanisms which are arranged at intervals along the length direction of the electric vehicle, wherein the bracket body is mounted on the girder, the locking mechanisms are arranged on the bracket body, and each row of locking mechanisms are arranged along the width direction of the electric vehicle; the locking mechanism is used for being matched with the movement of the lock shaft assembly of the power battery along the width direction of the electric vehicle, so that the lock shaft assembly is locked or unlocked in the locking mechanism, and the power battery is locked or unlocked.

In the scheme, the quick-change bracket is used for connecting the electric vehicle and the power battery, the structure of the electric vehicle is not required to be changed, the quick-change bracket is convenient to connect, and the installation is flexible; in addition, adopt two at least rows of locking mechanism and arrange along vehicle width, only need remove in vehicle width direction, can be with power battery unblock or locking in quick change support, convenient operation is swift, can not additionally occupy the long ascending space in girder bottom in the in-process of dismantling the installation power battery to power battery receives less in electric vehicle's width direction the impact, and then can improve locking mechanism's life. At least two rows of locking mechanisms are used for locking the power battery on the electric vehicle, so that the locking is stable, and the reliability of connection between the power battery and the electric vehicle is improved.

Preferably, at least one row of locking mechanisms is arranged near the center of the bracket body.

In this scheme, be close to support body center atress more, be close to support body center and set up at least one row locking mechanism can increase the overall bearing capacity of locking mechanism, has improved locking stability.

Preferably, at least one row of locking mechanisms is arranged at the edge of the bracket body.

In this scheme, because the position of locking is located the edge of quick change support, consequently, locking mechanism can make power battery bear bigger torsion, and locking stability is improved, has improved shock resistance.

Preferably, each row of locking mechanisms comprises at least two groups of locking mechanisms, and at least one group of locking mechanisms are arranged on the same side of the girder.

In this scheme, the homonymy of girder sets up at least a set of locking mechanism, makes locking mechanism atress balanced, improves power battery's locking stability.

Preferably, at least one row of said locking mechanism comprises a primary lock and/or a secondary lock.

Preferably, a row of locking mechanisms are respectively arranged at two edges of the bracket body, the locking mechanisms distributed on one side of the girder are primary locks, and the locking mechanisms distributed on the other side of the girder are secondary locks;

or, the locking mechanism located on one diagonal is a primary lock, and the locking mechanism located on the other diagonal is a secondary lock.

In this scheme, two rows of locking mechanism keep away from the central authorities of support body, and multiplicable locking mechanism is more firm to the stability of power battery locking, and hoist and mount is better, and power battery's shock resistance is difficult for breaking away from the quick change support, sets up primary lock and secondary lock respectively in the girder both sides, can prevent to be overconstrained to can improve the maneuverability of unblock.

The diagonal locking and diagonal hanging mode is adopted, so that the occurrence of over-positioning is avoided, over-constraint is prevented, and the locking is more balanced and stable.

Preferably, two rows of locking mechanisms are arranged near the center of the bracket body, wherein the locking mechanisms distributed on one side of the girder are primary locks, and the locking mechanisms distributed on the other side of the girder are secondary locks;

the locking mechanism located on one diagonal is a primary lock, and the locking mechanism located on the other diagonal is a secondary lock.

In this scheme, be close to support body center atress bigger, be close to support body center and set up the locking mechanism of two rows, improved locking stability, set up primary lock and secondary lock respectively in the girder both sides, can prevent the overconstraint to can improve the maneuverability of unblock.

Four rows of locking mechanisms are respectively arranged at two edges of the support body and near the center of the support body, so that the mounting capacity of the locking mechanisms is improved, heavier power batteries can be mounted, in addition, the design of the primary lock and the secondary lock is increased, the stability of the locking structure on the locking of the power batteries can be further improved, over-constraint is prevented, the power batteries are more difficult to separate from the locking mechanisms, and the impact bearing capacity is stronger.

Preferably, the primary lock comprises a first locking groove and a first lock tongue, and in a locking state, the first lock tongue stretches into the first locking groove and is used for blocking the lock shaft assembly from being separated from the first locking groove, and the first lock tongue abuts against the lock shaft assembly;

and/or the secondary lock comprises a second locking groove and a second lock tongue, when in a locking state, the second lock tongue stretches into the second locking groove and is used for blocking the lock shaft assembly from being separated from the second locking groove, and a gap is reserved between the second lock tongue and the lock shaft assembly.

In this scheme, the primary lock is used for pinning the lock axle, and the secondary lock is used for mounting the lock axle for can stop the lock axle subassembly through the secondary lock after the primary lock became invalid and break away from, thereby play fine guard action to power battery, prevent that power battery from dropping, improve the security. Meanwhile, a gap is reserved between the second lock tongue and the lock shaft assembly, so that the over-positioning caused by the abutting connection of a plurality of locking mechanisms and the lock shaft assembly is prevented, over-constraint is avoided, and the safety and stability of the electric vehicle are improved.

Preferably, the bracket body is split and comprises two split brackets, and the two split brackets are respectively connected to two sides of the girder.

In this scheme, the support body components of a whole that can function independently for every components of a whole that can function independently support weight and volume are less, and the convenience is installed respectively and is dismantled, is convenient for follow-up maintenance.

Preferably, the quick-change bracket further comprises an electric connector and a water-cooling connector, wherein the electric connector and the water-cooling connector are both arranged on one side, far away from the girder, of the bracket body along the width direction of the electric vehicle.

In this scheme, electric connector and water-cooling connector set up in the direction of power battery activity, conveniently dock with electric connector and water-cooling connector on the power battery to once only accomplish the mount and the water and electricity connection of power battery, power battery change process is high-efficient convenient.

Preferably, the bracket body comprises a bracket frame and a plurality of bracket beams which are distributed at intervals, the plurality of bracket beams are parallel and extend along the width direction of the electric vehicle, and two ends of the bracket beams are connected with the bracket frame.

In this scheme, the support roof beam supports in the inside of support frame, has strengthened the shock resistance of support frame.

Preferably, the bracket body further comprises a housing, the housing is mounted on the bracket frame and extends along the length direction of the electric vehicle, a wiring cavity is formed in the housing, and the bracket frame and/or the bracket beam is provided with a wiring channel which is communicated with the wiring cavity.

In this scheme, the cable holds in walking line chamber and walk the line passageway, is difficult for receiving external environment to invade, and the protection effect is good, has prolonged cable life.

An electric vehicle comprises a girder, a power battery, a quick-change bracket and at least two rows of locking mechanisms which are arranged at intervals along the length direction of the electric vehicle; the quick-change brackets are arranged on the girder, and the locking mechanisms are arranged on the quick-change brackets, wherein each row of locking mechanisms are distributed along the width direction of the electric vehicle; the power battery is connected to the quick-change bracket through at least two rows of locking mechanisms, and moves along the width direction of the electric vehicle relative to the quick-change bracket, so that the power battery is locked or unlocked to the quick-change bracket.

In this scheme, power battery passes through locking structure can convenient and fast's change to supply electric vehicle's energy fast, electric vehicle's continuation of journey mileage obtains the quick recovery. The arrangement direction of the locking mechanism is along the width direction of the electric vehicle, so that the disassembly direction of the power battery is defined as the width direction of the automobile, the power battery can be unlocked or locked on the electric vehicle only by moving in the direction, the operation is convenient and quick, the space in the length direction of the bottom of the girder cannot be additionally occupied in the process of disassembling and installing the power battery, the impact on the power battery in the width direction of the electric vehicle is small, and the service life of the locking mechanism can be further prolonged; in addition, at least two rows of locking mechanisms are used for locking the power battery to the electric vehicle, so that the locking is stable, and the reliability of connection between the power battery and the electric vehicle is enhanced.

Preferably, the power battery comprises an upper layer of battery pack and a lower layer of battery pack, wherein the upper layer of battery pack is arranged along the length direction of the girder.

In the scheme, the design of the battery packs at two sides is beneficial to fully utilizing the space, increasing the battery capacity and prolonging the endurance mileage of the electric vehicle.

Preferably, the upper layer battery pack comprises the battery pack positioned in the middle of the girder, and the girder does not interfere with the movement of the upper layer battery pack in a locking stroke of the locking shaft assembly on the power battery, which is moved to a locking position in the locking mechanism along the width direction of the electric vehicle.

In the scheme, the battery pack in the middle of the upper layer is prevented from interfering with the girder in the locking stroke of the locking position along the width direction of the electric vehicle, so that the locking process is ensured to be completed smoothly.

Preferably, the battery pack at the upper layer comprises the battery pack at least one side of the girder, the locking shaft assembly on the power battery moves to a locking position along the width direction of the electric vehicle in the locking mechanism, and the girder and/or the quick-change bracket does not interfere with the movement of the battery pack at the upper layer.

In the scheme, the battery packs at the two sides of the upper layer are prevented from interfering with the girder and/or the quick-change bracket in the locking stroke of the battery packs moving to the locking position along the width direction of the electric vehicle, so that the locking process is ensured to be successfully completed.

On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the utility model.

The utility model has the positive progress effects that: the lock shaft assembly is arranged on the battery frame, so that the internal space of the battery frame is not occupied, the space utilization rate is high, the containing space and the quantity of battery packs are improved, and the endurance mileage of the electric vehicle is improved; the arrangement direction of the lock shaft assembly and the locking mechanism is along the width direction of the electric vehicle, so that the disassembly direction of the power battery is defined as the width direction of the automobile, the power battery can be unlocked or locked on the electric vehicle only by moving in the direction, the operation is convenient and quick, the space in the length direction of the bottom of the girder cannot be additionally occupied in the process of disassembling and installing the power battery, the impact on the power battery in the width direction of the electric vehicle is small, and the service life of the locking mechanism can be further prolonged; in addition, at least two rows of lock shaft assemblies and locking mechanisms are used for locking the power battery to the electric vehicle, so that the locking is stable, and the reliability of connection between the power battery and the electric vehicle is improved.

Drawings

Fig. 1 is a schematic view of a power cell of the present utility model mounted to a girder.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a schematic structural view of the power battery of the present utility model separated from the quick-change bracket.

Fig. 4 is a schematic structural view of the quick-change bracket of the present utility model.

Fig. 5 shows an embodiment of the locking mechanism arrangement of the present utility model.

Fig. 6 shows another embodiment of the locking mechanism arrangement of the present utility model.

Fig. 7 shows another embodiment of the locking mechanism arrangement of the present utility model.

Fig. 8 is a schematic view of a power cell according to the present utility model.

Fig. 9 is a schematic view of the bottom surface of the power cell of fig. 8.

Reference numerals illustrate:

girder 10

Quick change stand 20

Split bracket 21

Support frame 22

Support beam 23

Housing 24

Side plate 25

Power battery 30

Battery pack 31

Battery frame 32

Cross beam 33

First hollow structure 34

Second hollow structure 35

Reinforcing ribs 36

Locking mechanism 40

Lock shaft Assembly 50

Lock shaft 51

Mounting base 52

First connector assembly 61

Second connector assembly 62

Electric vehicle length direction X

Electric vehicle width direction Y

First diagonal V1

Second diagonal V2

Third diagonal V3

Fourth diagonal V4

Detailed Description

The utility model will now be more fully described by way of example only and with reference to the accompanying drawings, but the utility model is not thereby limited to the scope of the examples.

Example 1

The present embodiment is an electric vehicle, as illustrated in fig. 1 to 6, which includes a vehicle body, a girder 10, a quick-change bracket 20, a power battery 30, and at least two rows of locking mechanisms 40 arranged at intervals along the length direction of the electric vehicle; the quick-change bracket 20 is mounted on the girder 10, and in particular, a bolt assembly may be used to connect the quick-change bracket 20 and the girder 10. The locking mechanism 40 is provided on the quick-change bracket 20, wherein each row of locking mechanisms 40 is arranged in the width direction of the electric vehicle, as shown in fig. 1, wherein the direction indicated by Y is the width direction of the electric vehicle. The power battery 30 is connected to the quick-change bracket 20 through at least two rows of locking mechanisms 40, and the power battery 30 moves relative to the quick-change bracket 20 along the width direction of the electric vehicle, so that the power battery 30 is locked or unlocked to the quick-change bracket 20.

In this example, since the arrangement direction of the locking mechanism 40 is along the width direction of the electric vehicle, the disassembly direction of the power battery 30 is defined as the width direction of the vehicle, and the power battery 30 can be unlocked or locked to the electric vehicle only by moving in the direction, the operation is convenient and quick, the space in the length direction of the bottom of the girder is not additionally occupied in the process of disassembling and installing the power battery 30, and the impact of the power battery 30 in the width direction of the electric vehicle is small, so that the service life of the locking mechanism 40 can be prolonged; in addition, at least two rows of locking mechanisms 40 are used for hanging the power battery 30 on the electric vehicle, so that the locking is stable, the reliability of connection between the power battery and the electric vehicle is improved, and the device is simple in overall structure and convenient to assemble, disassemble and maintain compared with the existing locking scheme containing the cavity.

It should be noted that, the more the number of rows of the locking mechanism 40 is, the more the locking to the power battery 30 is facilitated, but the complexity of the structure is also increased, so the number of rows of the locking mechanism 40 needs to be designed according to actual needs, in this embodiment, two rows of locking mechanisms 40 are shared, and on the premise of ensuring that the locking mechanism has good load capacity, the number of total parts is reduced, the reliability is improved, and the manufacturing cost is reduced. In other embodiments, four rows of locking mechanisms 40 may also be used.

Preferably, the quick-change bracket 20 includes a bracket body and at least two rows of locking mechanisms 40 arranged at intervals along the length direction of the electric vehicle, as shown in fig. 1, wherein X is the length direction of the electric vehicle, the bracket body is mounted on the girder 10 of the electric vehicle, wherein the locking mechanisms 40 are arranged on the bracket body, and each row of locking mechanisms 40 is arranged along the width direction of the electric vehicle. In addition, a plurality of lock shaft assemblies 50 are arranged on the power battery 30, and the lock shaft assemblies 50 are in one-to-one correspondence with the locking mechanisms 40, so that the lock shaft assemblies 50 can be matched with the locking mechanisms 40 conveniently to realize locking or unlocking.

In this example, the quick-change bracket 20 is used for connecting an electric vehicle and the power battery 30, no change is required to be made to the structure of the electric vehicle, and the quick-change bracket 20 is convenient to connect and flexible to install.

The support body has a plurality of crossbeams, and locking mechanism sets up on the crossbeam, and at least one row locking mechanism 40 includes one-level lock and/or secondary lock, is provided with the locking mechanism of different grade type on same root crossbeam, is one-level lock and secondary lock respectively, and wherein one-level lock firmly locks the lock axle, forms the clearance between secondary lock and the lock axle, and two types of locking mechanism cooperation use is favorable to preventing the restraint excessively.

At least one row of locking mechanisms 40 is provided near the center of the bracket body. The stress is bigger near the center of the bracket body, and at least one row of locking mechanisms 40 are arranged near the center of the bracket body, so that the overall bearing capacity of the locking mechanisms can be increased, and the locking stability is improved.

Preferably, as shown in fig. 5, two rows of locking mechanisms 40 are provided at the middle position of the quick-change bracket 20, the locking mechanism 40 close to the first connector assembly 61 is provided as a primary lock, and the locking mechanism 40 far from the first connector assembly 61 is provided as a secondary lock.

In this embodiment, each row of locking mechanisms 40 includes two sets of locking mechanisms 40, the two sets of locking mechanisms 40 being located on opposite sides of the girder 10.

Two rows of locking mechanisms 40 are arranged near the center of the bracket body, and each row is provided with two groups of locking mechanisms 40 which are far away from each other; the locking mechanism 40 distributed on one side of the girder 10 is a primary lock, the locking mechanism 40 distributed on the other side of the girder 10 is a secondary lock, the stress near the center of the bracket body is larger, and two rows of locking mechanisms are arranged near the center of the bracket body, so that the locking stability is improved, the primary lock and the secondary lock are respectively arranged on two sides of the girder 10, the over-constraint can be prevented, and the unlocking operability can be improved.

In other embodiments, in the two central rows of locking mechanisms 40, the cross-locking arrangement is adopted, and the two sets of locking mechanisms 40 located on one diagonal line, i.e. in the direction of V3 in fig. 6, include primary locks for locking or hooking the lock shaft assembly 50, and the two sets of locking mechanisms 40 located on the other diagonal line, i.e. in the direction of V4 in fig. 6, include secondary locks for locking or hooking the lock shaft assembly 50, and the diagonal locking and diagonal hooking are adopted, so that the occurrence of the over-positioning condition is avoided, the over-constraint is prevented, and the locking is more balanced and stable.

In particular, the lock shaft assemblies 50 on the power battery 30 are arranged in the same layout as described above, i.e., two edges far from the center of the battery frame 32 are respectively provided with a row of lock shaft assemblies 50, so as to realize one-to-one correspondence between the lock shaft assemblies 50 and the locking mechanism 40.

As shown in fig. 5, in particular, each row of locking mechanisms 40 has four locking mechanisms 40, and two locking mechanisms 40 of one group are close to each other, and two groups of locking mechanisms 40 are far from each other and are disposed on both sides of the electric vehicle girder 10; in this embodiment, the two sets of locking mechanisms 40 are symmetrically distributed with respect to the girder 10 to equalize the forces applied to the locking mechanisms 40.

In this example, two rows of locking mechanism 40 are kept away from the central authorities of support body, and the stability of locking mechanism 40 to power battery 30 locking can be increased, and the hoist and mount is more firm, and power battery 30's shock resistance is better, is difficult for breaking away from quick change support 20, and same row's locking mechanism includes one-level lock and secondary lock, is favorable to avoiding the condition emergence of oversubscribing, and the locking is more balanced, stable.

In other embodiments, the position of the locking mechanism 40 may be adjusted according to the actual situation.

Preferably, at least one row of locking mechanisms 40 is arranged on the edge of the support body, the row number of the locking mechanisms 40 is increased, the load of a single locking mechanism 40 is shared, the overall bearing capacity of the locking mechanism 40 is increased, and the locking stability is improved. Since the locked position is located at the edge of the quick-change bracket 20, the locking mechanism 40 can make the power battery 30 bear larger torsion force, so that the locking stability is improved, and the shock resistance is improved.

As shown in fig. 6, four rows of locking mechanisms 40 are provided on the bracket body, which are two rows at the edge and two rows at the center, and the four rows of locking mechanisms 40 cooperate to greatly improve the mounting capability of the power battery 30 and make the locking more firm. Two rows of locking mechanisms 40 are arranged near the center of the bracket body, and each row is provided with two groups of locking mechanisms 40 which are far away from each other; the locking mechanism 40 distributed on one side of the girder 10 is a primary lock, the locking mechanism 40 distributed on the other side of the girder 10 is a secondary lock, the stress near the center of the bracket body is larger, and two rows of locking mechanisms are arranged near the center of the bracket body, so that the locking stability is improved, the primary lock and the secondary lock are respectively arranged on two sides of the girder 10, the over-constraint can be prevented, and the unlocking operability can be improved. Preferably, the side closer to the first connector assembly 61 is provided as a primary lock and the side farther from the first connector assembly 61 is provided as a secondary lock.

In other embodiments, in the two central rows of locking mechanisms 40 and the two peripheral rows of locking mechanisms 40, the two sets of locking mechanisms 40 located in the direction V3 in fig. 6 include a primary lock or a secondary lock for locking or hooking the lock shaft assembly 50, and the two sets of locking mechanisms 40 located in the direction V4 in fig. 6 include a secondary lock or a primary lock for hooking or locking the lock shaft assembly 50, and the two sets of locking mechanisms 40 located in the direction V1 in fig. 6 include a primary lock or a secondary lock for locking or hooking the lock shaft assembly 50, and the two sets of locking mechanisms 40 located in the direction V4 in fig. 6 include a secondary lock or a primary lock for hooking or locking the lock shaft assembly 50.

In this example, through setting up four rows of locking mechanism 40 in center and edge to improve locking mechanism 40's the ability of carrying, can carry heavier power battery 30, in addition, increased the design of primary lock and secondary lock, can further improve the stability that locking structure locked power battery 30, prevent to surpass the restraint, power battery 30 is more difficult to break away from locking mechanism 40, bears the ability of impact stronger.

In other embodiments, three rows of locking mechanisms 40 are provided on the bracket body, two rows of edges form a cross-hanging-locking arrangement, and the middle row of locking mechanisms 40 plays a role in reinforcing locking.

In other embodiments, a plurality of rows of locking mechanisms 40 may also be provided in the middle of the bracket body, and the lock shaft assemblies 50 of the quick-change bracket 20 are close to the plurality of rows of lock shaft assemblies 50 in the center of the battery frame 32, such that the lock shaft assemblies 50 are in one-to-one correspondence with the locking mechanisms 40.

In other embodiments, as shown in fig. 7, a row of locking mechanisms 40 is provided on each side of the quick-change bracket 20, each row of locking mechanisms 40 including at least two sets of locking mechanisms 40, at least one set of locking mechanisms 40 being provided on the same side of the girder 10. The locking mechanism 40 distributed on one side of the girder is a primary lock, the locking mechanism 40 distributed on the other side of the girder is a secondary lock, the two rows of locking mechanisms 40 are far away from the center of the bracket body, the stability of the locking mechanism 40 to the locking of the power battery 30 can be increased, the hoisting is firmer, the impact resistance of the power battery 30 is better, the quick-change bracket 20 is not easy to separate, the primary lock and the secondary lock are respectively arranged on two sides of the girder 10, the over-constraint can be prevented, and the unlocking operability can be improved. Or, in the two rows of locking mechanisms 40, an arrangement mode of cross-connection and locking is adopted, the two groups of locking mechanisms 40 located on one diagonal line, namely the direction of V1 in FIG. 7, are primary locks for the locking shaft assembly 50 to be connected or locked, the two groups of locking mechanisms 40 located on the other diagonal line, namely the direction of V2 in FIG. 7, are secondary locks for the locking shaft assembly 50 to be locked or connected, and the diagonal locking and diagonal connection modes are adopted, so that the occurrence of the situation of over-positioning is avoided, over-constraint is prevented, and the locking is more balanced and stable.

The primary lock includes a first lock groove having a first opening for the lock shaft 51 to pass through, and a first lock tongue movable in the first lock groove to close or open the first opening, thereby locking or unlocking the lock shaft 51. The secondary lock includes a second lock groove having a second opening for the passage of the lock shaft 51, and a second lock tongue movable in the second lock groove to close or open the second opening.

The primary lock is different from the secondary lock in the structure of the lock tongue, when in a locking state, the first lock tongue stretches into the first lock groove and is used for blocking the lock shaft 51 from being separated from the first lock groove, the first lock tongue abuts against the lock shaft 51, the second lock tongue stretches into the second lock groove and is used for blocking the lock shaft 51 from being separated from the second lock groove, and a gap is reserved between the second lock tongue and the lock shaft 51.

The primary lock is used for locking the lock shaft 51, and the primary lock is used for mounting the lock shaft 51, so that the lock shaft 51 can be blocked from being separated through the secondary lock after the primary lock fails, the power battery is well protected, the power battery is prevented from falling, and the safety is improved. Meanwhile, a gap is reserved between the second lock tongue and the lock shaft 51, so that the over-positioning caused by the abutting connection of the plurality of locking mechanisms 40 and the lock shaft 51 is prevented, over-constraint is avoided, and the safety and stability of the electric vehicle are improved.

As shown in fig. 1, the bracket body is preferably split and includes two split brackets 21, and the two split brackets 21 are respectively connected to two sides of the girder 10. Specifically, the side of the split bracket 21 is connected to the side of the girder by welding or a bolt assembly.

In this example, the bracket body is split, so that each split bracket 21 has a smaller weight and volume, and is convenient to mount and dismount respectively, and convenient for subsequent maintenance.

Preferably, the quick-change bracket 20 further includes an electric connector and a water-cooled connector, both of which are provided at a side of the bracket body away from the girder 10 in the width direction of the electric vehicle.

As shown in fig. 3, in the embodiment, the side of the quick-change bracket 20 is provided with a side plate 25, and the side plate 25 is provided with a first connector assembly 61, where the first connector assembly 61 includes an electrical connector and a water-cooled connector.

In this example, the electric connector and the water-cooled connector are disposed in the direction in which the power battery 30 moves, and as the power battery 30 moves in the width direction of the electric vehicle, the battery pack electric connector and the battery pack water-cooled connector at one end of the power battery 30 gradually approach the electric connector and the water-cooled connector on the quick-change bracket 20 until being connected to each other, so that the mounting and the connection of the water and electricity of the power battery 30 are completed at one time, and the replacement process of the power battery 30 is efficient and convenient.

As shown in fig. 4, preferably, the bracket body includes a bracket frame 22 and a plurality of bracket beams 23 spaced apart from each other, the plurality of bracket beams 23 extending in parallel and in the width direction of the electric vehicle, and both ends being connected to the bracket frame 22.

Specifically, the support frame 22 includes four steel beams, a rectangular support frame 22 is formed by welding the four steel beams, the support beam 23 divides a large space in the middle of the support frame 22 into a plurality of small spaces, and the battery pack 31 can be placed in the small spaces as required, so that the utilization rate of the space is increased, and the overall energy density of the power battery 30 is improved. The steel beam is concave and formed by bending iron sheets, so that the overall weight of the support frame is reduced.

In this example, the support beam 23 is supported inside the support frame 22, enhancing the impact resistance of the support frame 22.

As shown in fig. 4, preferably, the bracket body further includes a housing 24, the housing 24 is mounted on the bracket frame 22 and extends along the length direction of the electric vehicle, a routing cavity is formed in the housing 24, and routing channels are formed in the bracket frame 22 and/or the bracket beam 23 and are communicated with the routing cavity.

In this example, the cables connected to the electric connector and the water-cooled connector on the quick-change bracket 20 all pass through the wiring cavity and the wiring channel, the cables are accommodated in the wiring cavity and the wiring channel, and are not easy to be disturbed by external environments, so that the protection effect is good, and the service life of the cables is prolonged.

Example two

Fig. 8-9 show an embodiment of a power cell according to the present utility model, which is largely identical to the power cell of the first embodiment, and is partially characterized as follows:

as shown in fig. 8, in the present embodiment, the power battery 30 includes a battery frame 32, a battery pack 31, and at least two rows of lock shaft assemblies 50 spaced apart along the length direction of the electric vehicle; the battery pack 31 is disposed inside the battery frame 32, and the lock shaft assemblies 50 are disposed on the battery frame 32, wherein each row of lock shaft assemblies 50 is arranged along the width direction of the electric vehicle. The battery frame 32 is used to move in the width direction of the electric vehicle to lock or unlock the lock shaft assembly 50 to or from the lock mechanism 40 on the electric vehicle to effect locking or unlocking of the power battery 30.

The lock shaft assembly 50 is arranged on the battery frame 32, so that the internal space of the battery frame 32 is not occupied, the space utilization rate is high, the containing space and the quantity of battery packs are improved, and the cruising mileage of the electric vehicle is improved; since the arrangement direction of the lock shaft assembly 50 is along the width direction of the electric vehicle, the disassembly direction of the power battery 30 is defined as the width direction of the vehicle, and the power battery 30 can be unlocked or locked to the electric vehicle only by moving in the direction, so that the operation is convenient and quick; in addition, at least two rows of lock shaft assemblies 50 are used to lock the power battery 30 to the electric vehicle, the locking is stable, and the reliability of the connection of the power battery 30 to the electric vehicle is improved.

Specifically, the arrangement of the lock shaft assemblies 50 corresponds to the lock mechanisms 40 of the quick-change bracket 20 in the first embodiment one by one.

At least one row of lock shaft assemblies 50 is positioned near the center of the battery frame 32, which is more stressed near the center of the battery frame, increasing the overall load carrying capacity of the lock shaft assemblies and improving the locking stability. In this embodiment, as shown in fig. 5, two rows of lock shaft assemblies 50 are provided near the center of the battery frame 32.

In other embodiments, at least one row of lock shaft assemblies 50 is provided at the edge of the battery frame 32. Specifically, as shown in fig. 7, two edges of the battery frame 32 are respectively provided with a row of lock shaft assemblies 50, and since the locked positions are located at two edges of the battery frame, the two rows of lock shaft assemblies 50 can make the power battery 30 bear larger torsion force, so that the locking stability is improved, and the impact resistance is improved.

In other embodiments, the battery frame 32 is provided with two rows of lock shaft assemblies 50 at the center and two rows of lock shaft assemblies 50 at the edges of the battery frame, so that the battery frame 32 has four rows of lock shaft assemblies 50, as shown in fig. 6, and can bear large load and have higher impact resistance.

In this example, the battery frame is sleeved outside the power battery 30, and is used for protecting the battery pack 31 inside, increasing the impact resistance of the power battery 30, and the lock shaft assembly 50 is directly arranged on the battery frame 32, so that the structure is simple and reliable, and the disassembly, assembly and maintenance are convenient.

Preferably, each row of lock shaft assemblies 50 includes at least two sets of lock shaft assemblies 50, and at least one set of lock shaft assemblies 50 is disposed on the same side of the girder 10 of the electric vehicle and corresponds to the locking mechanism 40.

In this embodiment, as shown in fig. 8, specifically, the lock shaft assemblies 50 are disposed corresponding to the locking mechanism 40, each row of lock shaft assemblies 50 has four lock shaft assemblies 50, and two lock shaft assemblies 50 are disposed close to each other, and two lock shaft assemblies 50 are disposed apart from each other and on two sides of the electric vehicle girder 10, in this embodiment, the two lock shaft assemblies 50 are symmetrically disposed with respect to the girder 10, so that the stress of the power battery 30 is balanced, and the service life of the lock shaft assemblies 50 is prolonged.

The battery frame 32 includes a plurality of cross members 33, and a lock shaft assembly 50 is provided on the cross members 33. Specifically, the cross member 33 is coupled to the lock shaft assembly 50 by welding, riveting, or bolting. The lock shaft assembly 50 is arranged on the cross beam 33, so that the internal space of the battery frame 32 is not occupied, the space utilization rate is high, the containing space and the quantity of battery packs are improved, and the endurance mileage of the electric vehicle is improved.

Preferably, the width of the lock shaft assembly 50 does not exceed the width of the cross beam 33, the lock shaft assembly 50 does not occupy the space in the width direction of the battery frame 32, and the space for accommodating the battery packs in the battery frame 32 is not occupied, so that the accommodating space and the number of the battery packs 31 are ensured.

In this example, the cross members 33 are used to support the battery frame 32, thereby enhancing the impact resistance of the battery frame 32.

Preferably, the cross members 33 are arranged at intervals along the length direction of the electric vehicle, and the cross members 33 divide the battery frame 32 into a plurality of battery accommodating chambers.

As shown in fig. 8, specifically, the battery accommodating cavity is rectangular parallelepiped to adapt to the shape of the battery pack 31, so that the battery pack 31 is fully filled in the battery accommodating cavity, and space is fully utilized, so that the occupied volume of the power battery 30 is reduced.

In this example, the battery accommodating chamber is used for accommodating the battery pack 31, the cross beams 33 are arranged along the length direction of the electric vehicle, the impact resistance of the power battery 30 is improved along one direction of the width of the electric vehicle, and the good impact resistance is maintained along the length direction of the electric vehicle.

In specific implementation, the battery pack 31 is connected to the bottom surface of the battery accommodating cavity, and one or more of colloid bonding, bolt assembly connection and fastening connection can be adopted between the battery pack and the bottom surface of the battery accommodating cavity.

As shown in fig. 9, in the present embodiment, the battery frame 32 and the cross beam 33 have a plurality of first hollow structures 34 for weight reduction; the bottom of the battery frame 32 is provided with a second hollow structure 35, and the bottom is provided with a plurality of reinforcing ribs 36 to strengthen the strength of the battery frame 32.

In other embodiments, the battery frame 32 includes a plurality of stringers and is arranged at intervals in the width direction of the electric vehicle, the stringers dividing the battery frame 32 into a plurality of battery accommodation chambers.

In this example, the stringers enhance the impact resistance of the battery frame 32.

Preferably, the lock shaft assembly 50 includes a mounting base 52 and a lock shaft 51, the mounting base 52 is mounted on the top of the battery frame 32, both ends of the lock shaft 51 are connected to the mounting base 52, and the lock shaft 51 is adapted to cooperate with the locking mechanism 40.

In this example, the lock shaft 51 is locked to the locking mechanism 40, so that the locking can be completed, and the lock shaft assembly 50 has a simple and reliable structure and is convenient to replace and maintain.

As shown in fig. 8, the lock shaft assembly 50 is independently mounted on the battery frame 32 through the mounting seat 52, so that the supporting strength of the power battery 30 in locking connection with the electric vehicle can be improved, and the position of the single lock shaft assembly 50 can be conveniently adjusted.

Specifically, the mounting seat 52 is formed by casting, the processing period is shortened, the production efficiency is improved, the adjustment is convenient, and the yield of the fixing seat is improved by casting. In addition, the strength of the casting material is superior to that of the sheet metal material, which is beneficial to ensuring the structural strength of the mounting seat 52, thereby improving the strength of the lock shaft assembly 50. In other embodiments, the mounting base 521 may be welded from sheet metal.

Preferably, the power cell 30 further includes a cell pack electrical connector and a cell pack water cooled connector, each mounted to one side of the cell frame 32.

In this example, the second connector assembly 62 is mounted on the side of the battery frame 32, and the second connector assembly 62 includes a battery pack electrical connector and a battery pack water-cooling connector, and since the second connector assembly 62 is located in the direction in which the power battery 30 is pack-moved, the mounting of the power battery 30 and the connection of the first connector assembly 61 and the second connector assembly 62 can be simultaneously completed as the power battery 30 is moved and mounted on the electric vehicle, and the connection process is convenient and quick.

Example III

The present embodiment is a power battery and an electric vehicle, most of the features of which are consistent with those of the electric vehicle of the first embodiment and the power battery of the second embodiment, and the differences are as follows:

in this embodiment, the power battery 30 further includes a support plate and a plurality of additional battery packs, the support plate is disposed on top of the battery frame 32 and forms a double-layer structure with the battery frame 32, the support plate is used for supporting the additional battery packs on the upper layer, and the plurality of additional battery packs are arranged along the length direction of the electric vehicle.

In this example, the support plate and the battery frame 32 form a double-layer structure, which makes full use of space, increases the overall capacity of the battery, and is beneficial to prolonging the travel mileage of the electric automobile for single charging.

Preferably, the power battery comprises an upper layer battery pack and a lower layer battery pack, wherein the upper layer battery pack is arranged along the length direction of the girder 10.

In the example, the design of the battery packs at two sides is beneficial to fully utilizing the space, increasing the battery capacity and prolonging the endurance mileage of the electric vehicle.

Preferably, the upper layer battery pack includes a battery pack located in the middle of the girder 10, and the lateral clearance between the battery pack located in the middle of the girder 10 and the girder 10 located on the locking path is larger than the locking stroke of the lock shaft assembly 50 moving from the unlocking position to the locking position of the electric vehicle in the width direction of the locking mechanism 40, that is, the lock shaft assembly 50 moves to the locking position in the width direction of the electric vehicle in the locking mechanism 40, and the girder 10 does not interfere with the movement of the battery pack in the middle of the girder 10.

As shown in fig. 1, specifically, the girder 10 includes two long strips and a connecting member, the two long strips are oppositely disposed, the connecting member is connected to the upper ends of the two long strips, a battery pack in the middle row is disposed between the two long strips, and the lateral surfaces of the battery pack and the lateral surfaces of the strips on the locking path form the lateral gap.

In this example, in the locking stroke in which the power battery 30 is moved to the locking position along the width of the electric vehicle, the battery pack in the middle of the upper layer is prevented from interfering with the girder 10, so that the locking process is ensured to be completed smoothly.

The upper layer battery pack includes a battery pack located at least one side of the girder 10, preferably, the upper layer battery pack includes a battery pack located at an outer side of the girder 10, and a lateral clearance between the battery pack located at the outer side of the girder 10 and a side wall of the girder 10 and/or the quick-change bracket 20 located on the locking path is greater than a locking stroke of the lock shaft assembly 50 on the power battery 30 moving from the unlocking position to the locking position in the width direction of the electric vehicle in the locking mechanism 40, that is, the lock shaft assembly 50 does not interfere with the movement of the battery pack located at the outer side of the girder 10 in the locking stroke of the lock shaft assembly 50 moving to the locking position in the width direction of the electric vehicle in the locking mechanism 40. Specifically, the gap formed between the upper layer battery pack located at the outer side of the girder 10 and the outer side of the long slat or the side wall of the quick-change bracket 20 located on the locking path is the above-mentioned lateral gap.

In this example, during the locking stroke of the power battery 30 moving to the locking position along the width of the electric vehicle, the battery pack on the outer side of the upper layer is prevented from interfering with the girder 10 and/or the quick-change bracket 20, so that the locking process is ensured to be successfully completed.

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

Claims

1. A power battery, install in electric vehicle, its characterized in that: the electric vehicle comprises a battery frame, a battery pack and at least two rows of lock shaft assemblies which are arranged at intervals along the length direction of the electric vehicle;

the battery pack is arranged inside the battery frame, the lock shaft assemblies are arranged on the battery frame, and each row of lock shaft assemblies are arranged along the width direction of the electric vehicle;

the battery frame is used for moving along the width direction of the electric vehicle so as to enable the lock shaft assembly to be locked or unlocked on a locking mechanism on the electric vehicle, so that the power battery is locked or unlocked.

2. The power cell of claim 1, wherein: at least one row of lock shaft assemblies is arranged on the edge of the battery frame.

3. The power cell of claim 1, wherein: at least one row of lock shaft assemblies is disposed proximate the center of the battery frame.

4. The power cell of claim 1, wherein: each row of lock shaft assemblies comprises at least two groups of lock shaft assemblies, and at least one group of lock shaft assemblies are arranged on the same side of a girder of the electric vehicle.

5. The power cell of claim 1, wherein: the battery frame comprises a plurality of cross beams, and the lock shaft assembly is arranged on the cross beams.

6. The power cell of claim 5, wherein: the cross beams are arranged at intervals along the length direction of the electric vehicle, and divide the battery frame into a plurality of battery accommodating cavities.

7. The power cell of claim 1, wherein: the battery frame comprises a plurality of longitudinal beams and is arranged at intervals along the width direction of the electric vehicle, and the longitudinal beams divide the battery frame into a plurality of battery accommodating cavities.

8. The power cell of claim 1, wherein: the lock shaft assembly comprises a mounting seat and a lock shaft, wherein the mounting seat is mounted at the top of the battery frame, two ends of the lock shaft are connected to the mounting seat, and the lock shaft is used for being matched with the locking mechanism.

9. The power cell of claim 1, wherein: the power battery also comprises a battery pack electric connector and a battery pack water-cooling connector, and the battery pack electric connector and the battery pack water-cooling connector are both arranged on one side of the battery frame.

10. The power cell of claim 1, wherein: the power battery also comprises a bearing plate and a plurality of additional battery packs, wherein the bearing plate is arranged at the top of the battery frame and forms a double-layer structure with the battery frame, the bearing plate is used for bearing the additional battery packs, and the additional battery packs are arranged along the length direction of the electric vehicle.

11. A quick change bracket for connection to a girder of an electric vehicle for mounting a power battery, characterized by: the quick-change bracket comprises a bracket body and at least two rows of locking mechanisms which are arranged at intervals along the length direction of the electric vehicle, wherein the bracket body is mounted on the girder, the locking mechanisms are arranged on the bracket body, and each row of locking mechanisms are arranged along the width direction of the electric vehicle; the locking mechanism is used for being matched with the movement of the lock shaft assembly of the power battery along the width direction of the electric vehicle, so that the lock shaft assembly is locked or unlocked in the locking mechanism, and the power battery is locked or unlocked.

12. The quick-change stand of claim 11, wherein: and at least one row of locking mechanisms is arranged near the center of the bracket body.

13. The quick-change stand of claim 11, wherein: at least one row of locking mechanisms is arranged on the edge of the support body.

14. A quick-change stand as claimed in claim 12 or 13, wherein: each row of locking mechanisms comprises at least two groups of locking mechanisms, and at least one group of locking mechanisms are arranged on the same side of the girder.

15. A quick-change stand as claimed in claim 12 or 13, wherein: at least one row of the locking mechanism includes a primary lock and/or a secondary lock.

16. The quick-change stand of claim 15, wherein: two rows of locking mechanisms are arranged near the center of the bracket body; the locking mechanism distributed on one side of the girder is a primary lock, and the locking mechanism distributed on the other side of the girder is a secondary lock;

17. The quick-change stand of claim 15, wherein: the two edges of the bracket body are respectively provided with a row of locking mechanisms, the locking mechanisms distributed on one side of the girder are primary locks, and the locking mechanisms distributed on the other side of the girder are secondary locks;

18. A quick-change stand as claimed in claim 16 or 17, wherein: the primary lock comprises a first locking groove and a first lock tongue, when in a locking state, the first lock tongue stretches into the first locking groove and is used for blocking the lock shaft assembly from being separated from the first locking groove, and the first lock tongue abuts against the lock shaft assembly;

19. The quick-change stand of claim 11, wherein: the support body is split type, including two components of a whole that can function independently supports, and two components of a whole that can function independently supports connect in the both sides of girder respectively.

20. The quick-change stand of claim 11, wherein: the quick-change bracket further comprises an electric connector and a water-cooling connector, wherein the electric connector and the water-cooling connector are both arranged on one side, far away from the girder, of the bracket body along the width direction of the electric vehicle.

21. The quick-change stand of claim 11, wherein: the support body includes support frame and a plurality of interval distribution's support roof beam, a plurality of the support roof beam is parallel and along electric vehicle width direction extends, and both ends with the support frame is connected.

22. The quick-change stand of claim 21, wherein: the support body still includes the housing, the housing is installed on the support frame and along electric vehicle length direction extends, form in the housing and walk the line chamber, the support frame and/or have the line passageway in the support roof beam, the line passageway intercommunication walk the line chamber.

23. An electric vehicle characterized by: the electric vehicle comprises a girder, a power battery, a quick-change bracket and at least two rows of locking mechanisms which are arranged at intervals along the length direction of the electric vehicle;

the quick-change brackets are arranged on the girder, and the locking mechanisms are arranged on the quick-change brackets, wherein each row of locking mechanisms are distributed along the width direction of the electric vehicle;

the power battery is connected to the quick-change bracket through at least two rows of locking mechanisms, and moves along the width direction of the electric vehicle relative to the quick-change bracket, so that the power battery is locked or unlocked to the quick-change bracket.

24. The electric vehicle of claim 23, characterized in that: the power battery comprises an upper layer of battery pack and a lower layer of battery pack, wherein the upper layer of battery pack is distributed along the length direction of the girder.

25. The electric vehicle of claim 24, characterized in that: the upper layer battery pack comprises the battery pack positioned in the middle of the girder, and the girder does not interfere with the movement of the upper layer battery pack in a locking stroke of the locking shaft assembly on the power battery, which is moved to a locking position in the locking mechanism along the width direction of the electric vehicle.

26. The electric vehicle of claim 24, characterized in that: the upper layer battery pack comprises the battery pack positioned on at least one side of the girder, a lock shaft assembly on the power battery moves to a locking stroke of a locking position along the width direction of the electric vehicle in the locking mechanism, and the girder and/or the quick-change bracket does not interfere with the movement of the upper layer battery pack.