Battery pack assembly, battery fixing seat, quick-change support assembly and electric vehicle

Abstract

The application discloses a battery pack assembly, a battery fixing seat, a quick-change support assembly and an electric vehicle. The battery pack assembly comprises a battery pack, a locking portion and a plurality of battery pack buckle limiting components. The locking portion is used for limiting the relative positions of the battery pack and the battery fixing seat in a first direction and a second direction. The plurality of battery pack buckle limiting components are arranged to be clamped on the battery fixing seat to limit the relative displacement of the battery pack and the battery fixing seat in a third direction perpendicular to the first direction and the second direction. The battery fixing seat comprises a fixing support, a locking mechanism and a plurality of fixing seat buckle components. The fixing seat buckle limiting components are arranged to be clamped on the battery pack buckle limiting components. The displacement of the battery pack during the non-steady operation of the electric vehicle can be avoided or at least weakened, so that the abnormal sound or wear caused by the collision between the battery pack and the fixing support can be avoided or at least reduced, and the safety performance and service life of the battery pack assembly and the battery fixing seat are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric vehicles, in particular to a battery pack assembly, a battery fixing seat, a quick-change support assembly and an electric vehicle. BACKGROUND

[0002] The existing electric vehicle generally comprises a battery pack assembly and a battery fixing seat, and the battery fixing seat is used for mounting the battery pack assembly. The battery fixing seat comprises a fixing support and a locking mechanism, and the locking mechanism is arranged in a side wall of the fixing support in the length direction of the fixing support. The battery pack assembly comprises a battery pack, a locking shaft and a guide positioning block, and the locking shaft and the guide positioning block are arranged in the side wall of the battery pack in the length direction of the battery pack, and the locking shaft is locked in the locking mechanism. The guide positioning block comprises a guide positioning component and an elastic component. The elastic component is connected between the guide positioning component and the side wall of the battery pack. The guide positioning component can move close to the side wall of the battery pack against the elastic force of the elastic component or move away from the side wall of the battery pack through the elastic recovery of the elastic component, and the guide positioning component is used for abutting against the side wall of the fixing support to realize positioning and guiding.

[0003] However, the structure has the following defects: since the deformation direction of the elastic component is the width direction of the battery pack, when the electric vehicle is not stably driven, such as too large or frequent turning angle, the elastic component is directly extruded by the battery fixing seat and deformed along the width direction of the battery pack, so that the battery pack is displaced and even collides with the battery fixing seat, thereby causing abnormal sound or wear, reducing the service life and safety performance. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defect that the battery pack is easily displaced when the existing electric vehicle is not stably driven, thereby bringing safety hazards, and to provide a battery pack assembly, a battery fixing seat, a quick-change support assembly and an electric vehicle.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] A battery pack assembly comprises a battery pack and a locking portion, the locking portion is used for locking the battery pack in the locking mechanism of the battery fixing seat to limit the relative displacement of the battery pack and the battery fixing seat in the first direction and the second direction, the first direction is perpendicular to the second direction, and the battery pack assembly further comprises:

[0007] A plurality of battery pack buckle limiting components are fixedly arranged on the battery pack, and the battery pack buckle limiting components are arranged to be clamped on the battery fixing seat to limit the relative displacement of the battery pack and the battery fixing seat in the third direction perpendicular to the first direction and the second direction.

[0008] In the present scheme, a plurality of battery pack buckle limiting assemblies are fixed to the battery pack, and the battery pack buckle limiting assembly is arranged to be clamped to the battery fixing seat, that is, the structure of left and right dead limiting (i.e. hard limiting or fixed limiting) in the third direction is adopted between the battery pack and the battery fixing seat, so that the relative movement between the battery pack and the battery fixing seat in the third direction can be greatly limited. The displacement of the battery pack during the non-stable operation of the electric vehicle (such as the electric vehicle turning too large or too frequently) can be avoided or at least weakened, so that the abnormal noise or wear caused by the collision between the battery pack and the fixing support can be avoided or at least reduced, thereby improving the safety performance and service life of the battery pack assembly and the battery fixing seat.

[0009] Preferably, the battery pack buckle limiting assembly comprises:

[0010] A battery pack buckle limiting part is fixed to the outer wall surface of the side wall of the battery pack and arranged to be clamped to the battery fixing seat, and the battery pack buckle limiting part and the outer wall surface of the side wall of the battery pack have a battery pack containing space.

[0011] In the present scheme, the battery pack buckle limiting part and the outer wall surface of the side wall of the battery pack have a battery pack containing space, which is simple in structure and can very reliably limit the relative movement between the battery pack and the battery fixing seat in the third direction.

[0012] Preferably, the battery pack containing space has a battery pack containing opening, which is located at the front end of the battery pack containing space in the length direction of the battery pack and / or at the top end of the battery pack containing space in the height direction of the battery pack;

[0013] And / or, the battery pack buckle limiting part extends in the length direction of the battery pack and the height direction of the battery pack;

[0014] And / or, the battery pack buckle limiting part has a battery pack front end surface, and the battery pack front end surface has a battery pack guide surface, which is an inclined plane;

[0015] And / or, the battery pack buckle limiting part adopts a plate structure.

[0016] In the present scheme, the battery pack containing opening can allow at least part of the battery fixing seat to enter the battery pack containing space, so that the battery pack buckle limiting part and the battery fixing seat can be clamped, and the battery fixing seat will not be interfered before the battery pack buckle limiting part is installed in place.

[0017] The battery pack buckle limiting part extends along the length direction of the battery pack and the height direction of the battery pack, can increase the area of the battery pack buckle limiting part and the battery fixing seat, and further improve the limiting degree of the relative movement between the battery pack and the battery fixing seat in the width direction of the battery pack.

[0018] The battery pack front end surface has a battery pack guide surface which is an inclined plane. During the movement of the battery pack buckle limiting part along the length direction of the battery pack relative to the battery fixing seat when the battery pack assembly is installed on the battery fixing seat, the battery pack guide surface can better play a guiding role to ensure the installation reliability and accuracy of the two.

[0019] Preferably, the battery pack buckle limiting assembly further comprises:

[0020] A battery pack protruding part fixed to and protruding from the outer wall surface of the side wall of the battery pack, and the battery pack buckle limiting part is adjacent to the battery pack protruding part.

[0021] Preferably, the battery pack protruding part and the battery pack buckle limiting part are integrally formed;

[0022] And / or, the battery pack protruding part and the battery pack buckle limiting part adopt a plate structure;

[0023] And / or, the material of the battery pack protruding part and the battery pack buckle limiting part is steel;

[0024] And / or, the battery pack protruding part is vertically arranged between the battery pack buckle limiting part and the side wall of the battery pack;

[0025] And / or, the battery pack protruding part extends towards the battery fixing seat along the width direction of the battery pack, and extends along the height direction or the length direction of the battery pack.

[0026] Preferably, the battery pack buckle limiting assembly further comprises:

[0027] A battery pack mounting part fixed to the outer wall surface of the side wall of the battery pack, the battery pack protruding part is fixed to the battery pack mounting part and extends towards the battery fixing seat from the side of the battery pack mounting part facing the battery fixing seat, and the battery pack buckle limiting part, the battery pack protruding part and the battery pack mounting part surround the battery pack containing space.

[0028] Preferably, the battery pack buckle limiting assembly on the same side wall has at least two, and the two ends of the side wall in the length direction of the battery pack are provided with the battery pack buckle limiting assembly. In this way, the relative movement between the battery pack and the end of the battery fixing seat adjacent to the battery pack in the width direction of the electric vehicle can be directly limited, so that the collision between the battery pack and the end of the battery fixing seat arranged oppositely can be avoided in the case of excessive or frequent turning angle of the electric vehicle, thereby reducing the wear of the battery pack and the battery fixing seat and improving the service life of the battery pack and the fixing bracket.

[0029] Preferably, the battery pack buckle limiting assembly on the same side wall has at least three, and the middle part of the side wall in the length direction of the battery pack is also provided with the battery pack buckle limiting assembly.

[0030] Preferably, the battery pack buckle limiting assemblies on the two side walls are symmetrically arranged.

[0031] And / or, among the battery pack buckle limiting assemblies on the same side wall and the locking part, the battery pack buckle limiting assembly and the locking part are arranged in the length direction of the battery pack.

[0032] In this scheme, the battery pack buckle limiting assemblies on the two side walls are symmetrically arranged, which can symmetrically left and right the battery pack buckle limiting assemblies subjected to tension and pressure, thereby further improving the limiting effect of the battery pack and the battery fixing seat in the width direction of the battery pack.

[0033] Preferably, the battery pack assembly further comprises:

[0034] A plurality of support limiting assemblies, a plurality of the support limiting assemblies are fixedly arranged on the two side walls in the length direction of the battery pack, and the support limiting assemblies are arranged to abut against the inner wall surface of the side wall in the length direction of the battery fixing seat, so as to limit the relative displacement between the battery pack and the battery fixing seat in the width direction of the battery pack.

[0035] Among the support limiting assemblies and the battery pack buckle limiting assemblies on the same side wall of the battery pack, the support limiting assemblies and the battery pack buckle limiting assemblies are arranged in the length direction of the battery pack.

[0036] In the scheme, the support limiting assembly is fixedly arranged on the side walls of the battery pack in the length direction of the battery pack and abuts against the battery fixing seat, so that the relative movement between the battery pack and the battery fixing seat in the width direction of the electric vehicle is limited, and the relative movement between the battery pack and the battery fixing seat in the width direction of the electric vehicle is further limited, so that the collision between the battery pack and the battery fixing seat can be avoided in the case that the turning angle of the electric vehicle is too large or too frequent, and the abrasion of the battery pack and the battery fixing seat is reduced, and the service life of the battery pack and the battery fixing seat is improved.

[0037] Preferably, the support limiting assembly is fixedly arranged at the end of the side wall of the battery pack in the length direction of the battery pack, so as to limit the relative displacement between the end of the battery pack and the end of the battery fixing seat arranged adjacent to each other in the width direction of the battery pack.

[0038] Preferably, the support limiting assembly is fixedly arranged at the end of the side wall of the battery pack in the length direction of the battery pack, so as to limit the relative displacement between the end of the battery pack and the end of the battery fixing seat arranged adjacent to each other in the width direction of the battery pack.

[0039] Preferably, the support limiting assemblies arranged on the two side walls are symmetrically arranged.

[0040] Preferably, the support limiting assembly comprises a convex block, the convex block is convexly arranged on the outer wall surface of the side wall of the battery pack, and the convex block has a convex surface for abutting against the inner wall surface of the side wall of the battery fixing seat.

[0041] In the scheme, the support limiting assembly is fixedly arranged at the end of the side wall of the battery pack in the length direction of the battery pack, so as to directly limit the relative movement between the end of the battery pack and the end of the battery fixing seat arranged adjacent to each other in the width direction of the electric vehicle, so that the collision between the ends of the battery pack and the battery fixing seat arranged adjacent to each other can be avoided in the case that the turning angle of the electric vehicle is too large or too frequent, and the abrasion of the battery pack and the battery fixing seat is reduced, and the service life of the battery pack and the battery fixing seat is improved.

[0042] Meanwhile, the support limiting assembly is arranged at the two ends of the side wall of the battery pack in the length direction of the battery pack, so as to more reliably limit the relative movement between the two ends of the battery pack and the battery fixing seat arranged adjacent to each other in the width direction of the electric vehicle.

[0043] The convex block is convexly arranged on the outer wall surface of the side wall of the battery pack, so as to provide a hard support to the battery pack, and more reliably limit the relative movement between the ends of the battery pack and the battery fixing seat arranged adjacent to each other in the width direction of the electric vehicle.

[0044] Preferably, the battery pack assembly further comprises:

[0045] A plurality of battery replacement guiding and limiting assemblies are fixed to the two side walls of the battery pack in the length direction of the battery pack, and the battery replacement guiding and limiting assemblies are arranged to abut against the inner wall surface of the side wall of the battery fixing seat in the length direction of the battery fixing seat, so as to clamp the battery pack in the battery fixing seat;

[0046] In the battery pack buckle limiting assembly and the battery replacement guiding and limiting assembly located on the same side wall of the battery pack, the battery replacement guiding and limiting assembly is arranged to be spaced from the battery pack buckle limiting assembly in the length direction of the battery pack;

[0047] And / or, a plurality of battery pack buckle limiting assemblies are fixed to the side wall of the battery pack in the length direction of the battery pack, preferably, a plurality of battery pack buckle limiting assemblies are distributed on the two side walls of the battery pack in the length direction of the battery pack;

[0048] And / or, the first direction is the length direction of the battery pack, the second direction is the height direction of the battery pack, and the third direction is the width direction of the battery pack.

[0049] In this scheme, the battery replacement guiding and limiting assembly plays a guiding role during the installation of the battery pack assembly, and after the installation of the battery pack assembly is completed, it plays a limiting and clamping role in the width direction of the electric vehicle to support the battery fixing seat, so as to ensure that the battery pack assembly can be very reliably installed in the battery fixing seat under the condition that the electric vehicle is normally running.

[0050] A plurality of battery pack buckle limiting assemblies are distributed on the two side walls of the battery pack in the length direction of the battery pack, so that when the electric vehicle is not running stably and the battery pack tries to sway left and right, the battery pack buckle limiting assembly on one side wall is subjected to pressure, and the battery pack buckle limiting assembly on the other side wall is subjected to tension, that is, the battery pack buckle limiting assemblies on the two side walls are simultaneously subjected to force, so that the relative displacement between the battery pack and the battery fixing seat in the width direction of the battery pack can be greatly reduced or almost avoided.

[0051] The application also provides a battery fixing seat, which comprises a fixed support and a locking mechanism, the locking mechanism is fixed to the fixed support, and the battery fixing seat is used for being installed on the vehicle body of an electric vehicle to fix the battery pack assembly as described above.

[0052] The battery fixing seat further comprises:

[0053] A plurality of fixed seat buckle limiting components are fixedly arranged on the fixed support, and the fixed seat buckle limiting components are arranged in one-to-one correspondence with the plurality of battery pack buckle limiting components. The fixed seat buckle limiting components are arranged to be buckled with the corresponding battery pack buckle limiting components to limit the relative displacement of the battery pack and the fixed support in the third direction.

[0054] In the present scheme, a plurality of battery pack buckle limiting components are fixedly arranged on the battery pack, and a plurality of fixed seat buckle limiting components are fixedly arranged on the fixed support. The fixed seat buckle limiting components are buckled with the corresponding battery pack buckle limiting components, that is, the structure of the third direction left and right dead limiting (i.e. hard limiting or fixed limiting) is adopted between the battery pack and the battery fixed seat, so that the relative movement between the battery pack and the battery fixed seat in the third direction can be greatly limited. That is, compared with the prior art, the difficulty of battery pack shaking is greater, and the displacement of the battery pack during non-steady operation of the electric vehicle (such as too large or frequent turning angle of the electric vehicle) can be avoided or at least weakened, so that abnormal noise or wear caused by the collision between the battery pack and the fixed support can be avoided or at least reduced, thereby improving the safety performance and service life of the battery pack assembly and the battery fixed seat.

[0055] Preferably, the fixed seat buckle limiting component comprises:

[0056] A fixed seat buckle limiting portion is fixed to the inner wall surface of the side wall of the fixed support and arranged to be buckled with the battery pack buckle limiting component. The fixed seat buckle limiting portion and the inner wall surface of the side wall of the fixed support have a fixed seat containing space therebetween.

[0057] Preferably, the fixed seat containing space has a fixed seat containing opening, which is located at the rear end of the fixed seat containing space in the length direction of the fixed support and / or at the bottom end of the fixed seat containing space in the height direction of the fixed support. The fixed seat containing opening is used for the at least part of the battery pack buckle limiting component to enter and exit the fixed seat containing space.

[0058] And / or, the fixed seat buckle limiting portion extends in the length direction of the fixed support and the height direction of the fixed support.

[0059] And / or, the fixed seat buckle limiting portion has a fixed seat rear end surface, and the fixed seat rear end surface has a fixed seat guide surface, which is an inclined plane.

[0060] And / or, the fixed seat buckle limiting portion adopts a plate structure.

[0061] Preferably, the fixed seat buckle limiting component further comprises:

[0062] The fixed seat protrusion is fixed to and protrudes from the inner wall surface of the side wall of the fixed bracket, and the fixed seat snap-fit ​​limiting part is adjacent to the fixed seat protrusion.

[0063] Preferably, the protruding part of the fixing seat and the snap-fit ​​limiting part of the fixing seat are integrally formed;

[0064] And / or, both the protruding part of the fixing seat and the snap-fit ​​limiting part of the fixing seat adopt a plate-like structure;

[0065] And / or, the material of the protruding part of the fixing seat and the snap-fit ​​limiting part of the fixing seat is steel;

[0066] And / or, the protruding part of the fixing seat is vertically disposed between the fixing seat buckle limiting part and the side wall of the fixing bracket;

[0067] And / or, the mounting bracket protrusion extends toward the battery pack along the width direction of the mounting bracket and along the height or length direction of the mounting bracket.

[0068] Preferably, the fixing seat buckle limiting assembly further includes a fixing seat mounting part, which is fixed to the inner wall surface of the side wall of the fixing bracket. The fixing seat protrusion is fixed to the fixing seat mounting part and extends from the fixing seat mounting part toward the battery pack. The fixing seat buckle limiting part, the fixing seat protrusion, and the fixing seat mounting part form a fixing seat receiving space around each other.

[0069] Preferably, a plurality of the fixing seat buckle limiting components are fixed to the side wall of the fixing bracket along the length direction of the fixing bracket. More preferably, the plurality of the fixing seat buckle limiting components are distributed on both side walls of the fixing bracket along the length direction of the fixing bracket.

[0070] The present invention also provides a quick-change bracket assembly, which includes the battery pack assembly as described above and the battery holder as described above.

[0071] The present invention also provides a quick-change bracket assembly, which includes the battery pack assembly as described above and the battery holder as described above;

[0072] The battery pack buckle limiting part is engaged in the fixed seat receiving space, and / or the fixed seat buckle limiting part is engaged in the battery pack receiving space.

[0073] Preferably, the battery pack buckle limiting part and the fixing seat receiving space are in clearance fit, and / or the fixing seat buckle limiting part and the battery pack receiving space are in clearance fit.

[0074] Preferably, the maximum gap of the clearance fit is less than or equal to 0.5 mm.

[0075] Preferably, the battery pack accommodating space has a battery pack accommodating opening for the fixing seat buckle limiting part to enter and exit the battery pack accommodating space.

[0076] The fixing seat accommodating space has a fixing seat accommodating opening for the battery pack buckle limiting part to enter and exit the fixing seat accommodating space.

[0077] The present application also provides an electric vehicle comprising the quick-change support assembly as described above.

[0078] On the basis of common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily, i.e. to obtain each preferred example of the present application.

[0079] The positive progress effect of the present application is that:

[0080] The battery pack assembly, the battery fixing seat, the quick-change support assembly and the electric vehicle of the present application have the following advantages:

[0081] Furthermore, multiple battery pack latching and limiting components are fixed to the two side walls along the length of the battery pack, and multiple fixing seat latching and limiting components are fixed to the two side walls along the length of the fixing bracket. When the electric vehicle is not running smoothly and the battery pack attempts to sway left and right, the battery pack latching and limiting component on one side wall is subjected to pressure from the corresponding fixing seat latching and limiting component, while the battery pack latching and limiting component on the other side wall is subjected to tension from the corresponding fixing seat latching and limiting component. That is, the battery pack latching and limiting components on both side walls are simultaneously subjected to force. This can significantly reduce or almost eliminate relative displacement between the battery pack and the fixing bracket in the width direction of the battery pack. The difficulty of battery pack swaying is further increased, and displacement of the battery pack when the electric vehicle is not running smoothly (such as when the electric vehicle turns at excessively large angles or frequently) can be further avoided or at least weakened. This can further avoid or at least reduce abnormal noise or wear caused by collisions between the battery pack and the fixing bracket, thereby further improving the safety performance and service life of the battery pack assembly and battery fixing bracket. Attached Figure Description

[0082] Figure 1 This is a three-dimensional structural diagram of a battery pack assembly in a preferred embodiment of the present invention in one position.

[0083] Figure 2 This is a three-dimensional structural diagram of the battery pack assembly in another position, which is a preferred embodiment of the present invention.

[0084] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0085] Figure 4 This is a schematic diagram of the battery pack buckle limiting component of the battery pack assembly according to a preferred embodiment of the present invention.

[0086] Figure 5 This is a three-dimensional structural diagram of the battery holder according to a preferred embodiment of the present invention.

[0087] Figure 6 for Figure 5 A magnified structural diagram of part B.

[0088] Figure 7 This is a schematic diagram of the fixing seat buckle limiting part of the battery fixing seat according to a preferred embodiment of the present invention.

[0089] Figure 8 This is a schematic diagram of the quick-change bracket assembly according to a preferred embodiment of the present invention.

[0090] Figure 9 for Figure 8 A magnified structural diagram of section C.

[0091] Figure 10 Structure diagram of the cooperation between the fixing seat buckle limiting component of the quick-change support assembly and the battery pack buckle limiting component of the preferred embodiment of the present application.

[0092] Explanation of reference signs:

[0093] Quick-change support assembly: 1

[0094] Battery pack assembly: 3

[0095] Battery pack: 30

[0096] Locking part: 31

[0097] Battery pack buckle limiting component: 32

[0098] Battery pack buckle limiting part: 320

[0099] Front end surface of battery pack: 321

[0100] Battery pack containing space: 322

[0101] Battery pack containing opening: 323

[0102] Battery pack protruding part: 324

[0103] Battery pack mounting part: 325

[0104] Support limiting component: 33

[0105] Battery replacement guide limiting component: 34

[0106] Guide mounting shell: 340

[0107] Guide limiting part: 341

[0108] Battery fixing seat: 5

[0109] Fixing support: 50

[0110] Locking mechanism: 51

[0111] Lock base: 510

[0112] Fixing seat buckle limiting component: 52

[0113] Fixing seat buckle limiting part: 520

[0114] Rear end surface of fixing seat: 521

[0115] Fixing seat containing space: 522

[0116] Fixing seat containing opening: 523

[0117] Fixing seat protruding part: 524

[0118] Mounting part of the fixed base: 525

[0119] Protrusion: 53

[0120] Battery pack length direction: 70

[0121] Battery pack width direction: 72

[0122] Battery pack height direction: 74

[0123] The length of the fixed bracket: 90

[0124] Width direction of the fixed bracket: 92

[0125] Height direction of fixed bracket: 94 Detailed Implementation

[0126] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0127] Figures 1-2 A schematic structure of a battery pack assembly 3 is shown according to an embodiment of the present invention. For example... Figures 1-2 As shown, the battery pack assembly 3 includes a battery pack 30, a locking part 31, and a plurality of battery pack latching and limiting assemblies 32. The locking part 31 is used to lock the battery pack 30 within the locking mechanism of the battery holder 5 to limit the relative displacement between the battery pack 30 and the battery holder 5 in a first direction and a second direction. The first direction is perpendicular to the second direction. In this embodiment, the locking part 31 is a locking shaft. The locking part 31 is fixed to the two side walls of the battery pack 30 located in the longitudinal direction 70 of the battery pack.

[0128] Multiple battery pack latching and limiting components 32 are fixed to the battery pack 30. These components are configured to latch onto the battery mounting base 5, limiting the relative displacement between the battery pack 30 and the battery mounting base 5 in a third direction perpendicular to the first and second directions. In other words, the battery pack 30 and the battery mounting base 5 employ a structure with rigid or fixed limits in the third direction, effectively restricting their relative movement in that direction. When the electric vehicle operates unevenly (e.g., with excessively large or frequent turning angles), the displacement of the battery pack 30 can be avoided or at least mitigated. This prevents or reduces abnormal noise or wear caused by collisions between the battery pack 30 and the mounting bracket 50 of the battery mounting base 5, thereby improving the safety performance and service life of the battery pack assembly 3 and the battery mounting base 5.

[0129] In this embodiment, the first direction is the length direction 70 of the battery pack, the second direction is the height direction 74 of the battery pack, and the third direction is the width direction 72 of the battery pack.

[0130] It should be understood that when the battery pack assembly 3 is installed on the battery fixing seat 5, the length direction 70 of the battery pack is the same as or substantially the same as the length direction of the battery fixing seat 5 and the length direction of the electric vehicle, wherein the front end refers to one end close to the front of the electric vehicle, and the rear end refers to one end close to the rear of the electric vehicle; the width direction 72 of the battery pack is the same as or substantially the same as the width direction of the battery fixing seat 5 and the width direction of the electric vehicle; and the height direction 74 of the battery pack is the same as or substantially the same as the height direction of the battery fixing seat 5 and the height direction of the electric vehicle.

[0131] The plurality of battery pack buckle limiting components 32 are fixed to the side walls in the length direction 70 of the battery pack 30. Further, the plurality of battery pack buckle limiting components 32 are distributed on the two side walls in the length direction 70 of the battery pack 30. In this way, when the electric vehicle is not running smoothly and the battery pack 30 tries to sway left and right, the battery pack buckle limiting components 32 on one side wall are subjected to pressure, and the battery pack buckle limiting components 32 on the other side wall are subjected to tension, that is, the battery pack buckle limiting components 32 on the two side walls are simultaneously subjected to force, which can greatly reduce or almost avoid the relative displacement between the battery pack 30 and the battery fixing seat 5 in the width direction 72 of the battery pack.

[0132] In addition, the battery pack buckle limiting components 32 on the same side wall have at least two. The two ends of the side wall in the length direction 70 of the battery pack 30 are each provided with a battery pack buckle limiting component 32. In this way, the relative movement between the battery pack 30 and the end portion of the battery fixing seat 5 arranged adjacent to each other in the width direction of the electric vehicle can be directly limited, so that in the case of excessive or frequent turning angle of the electric vehicle, collision between the end portions of the battery pack 30 and the battery fixing seat 5 arranged opposite to each other can be avoided, thereby reducing the wear between the battery pack 30 and the battery fixing seat 5 and improving the service life of the battery pack 30 and the battery fixing seat 5.

[0133] Further, the battery pack buckle limiting components 32 on the same side wall have at least three, and the middle portion of the side wall in the length direction 70 of the battery pack 30 is also provided with a battery pack buckle limiting component 32.

[0134] In addition, the battery pack buckle limiting components 32 on the two side walls are symmetrically arranged. In this way, the battery pack buckle limiting components 32 subjected to tension and pressure on the left and right sides are symmetrical, so that the limiting effect of the battery pack 30 and the battery fixing seat 5 in the width direction 72 of the battery pack can be further improved.

[0135] Further, among the battery pack buckle limiting assembly 32 and the locking portion 31 located at the same side wall, the battery pack buckle limiting assembly 32 is spaced apart from the locking portion 31 in the length direction 70 of the battery pack.

[0136] As shown in Figures 3-4 The battery pack buckle limiting assembly 32 includes a battery pack buckle limiting portion 320. The battery pack buckle limiting portion 320 is fixed to the outer wall surface of the side wall of the battery pack 30 and is arranged to be buckled to the battery fixing seat 5. The battery pack buckle limiting portion 320 and the outer wall surface of the side wall of the battery pack 30 have a battery pack containing space 322 therebetween. Its structure is simple, and the relative movement of the battery pack 30 and the battery fixing seat 5 in the third direction can be reliably limited.

[0137] The battery pack containing space 322 has a battery pack containing opening 323. The battery pack containing opening 323 is located at the front end of the battery pack containing space 322 in the length direction 70 of the battery pack and at the top end of the battery pack containing space 322 in the height direction 74 of the battery pack. The battery pack containing opening 323 can allow at least part of the battery fixing seat 5 to enter the battery pack containing space 322, so that the battery pack buckle limiting portion 320 and the battery fixing seat 5 can be buckled, and the battery fixing seat 5 will not be interfered before the battery pack buckle limiting portion 320 is installed in place. In other alternative embodiments, the battery pack containing opening 323 can also be arranged at the front end of the battery pack containing space 322 in the length direction 70 of the battery pack or at the top end of the battery pack containing space 322 in the height direction 74 of the battery pack.

[0138] Specifically, the battery pack buckle limiting portion 320 extends in the length direction 70 of the battery pack and the height direction 74 of the battery pack. In this way, the area of the buckled part of the battery pack buckle limiting portion 320 and the battery fixing seat 5 can be increased, thereby further improving the degree of limitation of the relative movement between the battery pack 30 and the battery fixing seat 5 in the width direction 72 of the battery pack. In this embodiment, the battery pack buckle limiting portion 320 adopts a plate structure.

[0139] Further, the battery pack buckle limiting portion 320 has a battery pack front end surface 321. The battery pack front end surface 321 has a battery pack guide surface. The battery pack guide surface is an inclined plane. During the installation of the battery pack assembly 3 to the battery fixing seat 5, the battery pack guide surface can better play a guiding role during the movement of the battery pack buckle limiting portion 320 relative to the battery fixing seat 5 in the length direction 70 of the battery pack, to ensure the installation reliability and accuracy of the two.

[0140] Additionally, the battery pack latching and limiting assembly 32 also includes a battery pack protrusion 324. The battery pack protrusion 324 is fixed to and protrudes from the outer wall surface of the side wall of the battery pack 30. The battery pack latching and limiting portion 320 is adjacent to the battery pack protrusion 324. In this embodiment, the battery pack protrusion 324 and the battery pack latching and limiting portion 320 are integrally formed.

[0141] Furthermore, both the battery pack protrusion 324 and the battery pack latching limit part 320 adopt a plate-like structure. The battery pack protrusion 324 and the battery pack latching limit part 320 are made of steel. Of course, in other alternative embodiments, the battery pack protrusion 324 and the battery pack latching limit part 320 may also be made of other materials according to actual needs.

[0142] Furthermore, the battery pack protrusion 324 is vertically disposed between the battery pack buckle limiting part 320 and the side wall of the battery pack 30. The battery pack protrusion 324 extends toward the battery fixing seat 5 along the width direction 72 of the battery pack, and extends along the height direction 74 or the length direction of the battery pack.

[0143] In addition, the battery pack latching and limiting assembly 32 also includes a battery pack mounting portion 325. The battery pack mounting portion 325 is fixed to the outer wall surface of the side wall of the battery pack 30. The battery pack extension portion 324 is fixed to the battery pack mounting portion 325 and extends from the side of the battery pack mounting portion 325 facing the battery holder 5 toward the battery holder 5. A battery pack receiving space 322 is formed around the battery pack latching and limiting portion 320, the battery pack extension portion 324, and the battery pack mounting portion 325. In this embodiment, the battery pack mounting portion 325 has a plate-like structure. The battery pack mounting portion 325 is detachably connected to the side wall of the battery pack located in the longitudinal direction 70 of the battery pack by fasteners. Of course, in other alternative embodiments, the battery pack mounting portion 325 may also be fixed to the side wall of the battery pack 30 located in the longitudinal direction 70 of the battery pack by rivets.

[0144] like Figures 2-3 As shown, the battery pack assembly 3 also includes a plurality of support and limiting components 33. The plurality of support and limiting components 33 are fixed to the two side walls of the battery pack 30 along the length direction 70 of the battery pack. The support and limiting components 33 are configured to abut against the inner wall surface of the side wall of the battery holder 5 along the length direction of the battery holder 5, thereby limiting the relative displacement between the battery pack 30 and the battery holder 5 in the width direction 72 of the battery pack. In this embodiment, the support and limiting components 33 located on the two side walls are symmetrically arranged.

[0145] The support limiting assembly 33 is fixedly arranged on the side wall of the battery pack 30 in the length direction 70 of the battery pack, and abuts against the battery fixing seat 5. During the installation of the battery pack assembly 3 to the battery fixing seat 5, the battery fixing seat 5 does not interfere with the support limiting assembly 33. After the battery pack assembly 3 is installed in place, the support limiting assembly 33 can support and limit, so as to limit the relative movement between the battery pack 30 and the battery fixing seat 5 in the width direction of the electric vehicle, thereby further limiting the relative movement between the battery pack and the battery fixing seat 5 in the width direction of the electric vehicle, so as to avoid the collision between the battery pack 30 and the battery fixing seat 5 in the case of excessive or frequent turning angle of the electric vehicle, thereby reducing the wear between the battery pack 30 and the battery fixing seat 5, and prolonging the service life of the battery pack 30 and the battery fixing seat 5.

[0146] Further, among the support limiting assembly 33 and the battery pack buckle limiting assembly 32 located on the same side wall of the battery pack 30, the support limiting assembly 33 and the battery pack buckle limiting assembly 32 are arranged in the length direction 70 of the battery pack.

[0147] The support limiting assembly 33 is fixedly arranged on the end of the side wall of the battery pack 30 in the length direction 70 of the battery pack, so as to limit the relative displacement between the battery pack 30 and the end of the battery fixing seat 5 arranged adjacent to each other in the width direction 72 of the battery pack, thereby directly limiting the relative movement between the battery pack 30 and the end of the battery fixing seat 5 arranged adjacent to each other in the width direction of the electric vehicle, so as to avoid the collision between the battery pack 30 and the end of the battery fixing seat 5 arranged adjacent to each other in the case of excessive or frequent turning angle of the electric vehicle, thereby reducing the wear between the battery pack 30 and the battery fixing seat 5, and prolonging the service life of the battery pack 30 and the battery fixing seat 5.

[0148] The support limiting assembly 33 is arranged on both ends of the side wall of the battery pack 30 in the length direction 70 of the battery pack, so as to more reliably limit the relative movement between the battery pack 30 and the two ends of the battery fixing seat 5 arranged adjacent to each other in the width direction of the electric vehicle.

[0149] In the present embodiment, the support limiting assembly 33 located at the front end of the battery pack 30 has one, and the support limiting assembly 33 located at the rear end of the battery pack 30 has two. In other alternative embodiments, the support limiting assembly 33 located at the front end of the battery pack 30 can also have two or more than two, and the support limiting assembly 33 located at the rear end of the battery pack 30 can also have one, three or more than three, which does not limit the protection scope of the present application.

[0150] Specifically, the support limiting assembly 33 comprises a convex bump protruding from the outer wall surface of the side wall of the battery pack 30. A hard support can be provided for the battery pack 30 to more reliably limit the relative movement between the end portion of the battery pack 30 arranged adjacent to the battery fixing seat 5 in the width direction of the electric vehicle. The convex bump has a convex surface for abutting against the inner wall surface of the side wall of the battery fixing seat 5.

[0151] In addition, the battery pack assembly 3 further comprises a plurality of battery replacement guiding and limiting assemblies 34 fixedly arranged in the side walls of the battery pack 30 in the length direction 70 of the battery pack. The battery replacement guiding and limiting assemblies 34 are arranged to abut against the inner wall surface of the side wall of the battery fixing seat 5 in the length direction of the battery fixing seat 5 to clamp the battery pack 30 in the battery fixing seat 5.

[0152] In the battery pack buckle limiting assembly 32 and the battery replacement guiding and limiting assembly 34 arranged in the same side wall of the battery pack 30, the battery replacement guiding and limiting assembly 34 is arranged in the length direction 70 of the battery pack 30 and spaced apart from the battery pack buckle limiting assembly 32.

[0153] The battery replacement guiding and limiting assembly 34 plays a guiding role during installation of the battery pack assembly 3 and plays a role of limiting and clamping the battery fixing seat 5 in the width direction of the electric vehicle after installation of the battery pack assembly 3 is completed, so as to ensure that the battery pack assembly 3 can be reliably installed in the battery fixing seat 5 under normal driving of the electric vehicle.

[0154] Specifically, the battery replacement guiding and limiting assembly 34 comprises a guiding and mounting shell 340, a guiding and limiting portion 341, and an elastic component (not shown in the figure). The guiding and mounting shell 340 is fixedly arranged in the side wall of the battery pack 30. The guiding and mounting shell 340 has an accommodating cavity (not shown in the figure) in the inside thereof, and the outer side surface of the guiding and mounting shell 340 is provided with a mounting opening (not shown in the figure) in communication with the accommodating cavity. The top portion of the outer side surface of the guiding and mounting shell 340 has an inclined surface extending obliquely inward to the upper end surface of the guiding and mounting shell 340 along the width direction 72 of the battery pack. The top portion of the outer side surface of the guiding and mounting shell 340 has an inclined surface, which can better play a guiding role during upward movement of the battery pack assembly 3 relative to the battery fixing seat 5 in the height direction of the electric vehicle when the battery pack assembly 3 is installed in the battery fixing seat 5, so as to ensure installation reliability of the two.

[0155] In addition, the guide limiting portion 341 is arranged in the installation opening. The outer side surface of the guide limiting portion 341 extends outwardly from the installation opening along the width direction 72 of the battery pack and is used to abut against the inner wall surface of the side wall of the battery fixing seat 5. The top of the region of the guide limiting portion 341 extending outwardly from the installation opening is provided with a slope, and the slope of the guide limiting portion 341 extends inwardly along the width direction 72 of the battery pack. The top of the region of the guide limiting portion 341 extending outwardly from the installation opening is provided with a slope, and during the process of moving the battery pack assembly 3 upwardly relative to the battery fixing seat 5 along the height direction of the electric vehicle when installing the battery pack assembly 3 on the battery fixing seat 5, the top of the guide limiting portion 341 can better play a guiding role to ensure the installation reliability of the two.

[0156] In addition, the elastic component acts on the inner side surface of the guide limiting portion 341 and transmits the varying force between the guide limiting portion 341 and the guide installation shell 340 to provide a clamping force outwardly along the width direction 72 of the battery pack to the battery fixing seat 5. The arrangement of the elastic component can provide a variable pre-tightening force to the battery fixing seat 5 to ensure that the battery pack assembly 3 can be clamped in the battery fixing seat 5 very reliably.

[0157] Figures 5-6 According to an embodiment of the present application, a schematic structure of a battery fixing seat 5 is shown. The battery fixing seat 5 is used to be installed on the vehicle body of an electric vehicle to fix the above-mentioned battery pack assembly 3. That is, the quick-change battery pack 30 or the charging battery pack can be installed. As shown in the figure, Figures 5-6 The battery fixing seat 5 includes a fixing support 50, a locking mechanism 51 and a plurality of fixing seat buckle limiting assemblies 52. The locking mechanism 51 is fixedly arranged on the fixing support 50. In the present embodiment, the locking mechanism 51 is located at the middle part of the fixing support 50.

[0158] The plurality of fixing seat buckle limiting assemblies 52 are fixedly arranged on the fixing support 50. The plurality of fixing seat buckle limiting assemblies 52 are arranged one by one corresponding to the plurality of battery pack buckle limiting assemblies 32. The fixing seat buckle limiting assemblies 52 are arranged to be buckled with the corresponding battery pack buckle limiting assemblies 32 to limit the relative displacement of the battery pack 30 and the fixing support 50 in the third direction. That is, the structure of the relative movement between the battery pack 30 and the battery fixing seat 5 in the third direction is limited (i.e. hard limiting or fixed limiting), so that the relative movement between the battery pack 30 and the battery fixing seat 5 in the third direction can be greatly limited. That is, compared with the prior art, the difficulty of the battery pack 30 to shake is greater, and the displacement of the battery pack 30 during the non-stable operation of the electric vehicle (such as the electric vehicle turning too large or too frequently) can be avoided or at least weakened, so that the abnormal sound or wear caused by the collision between the battery pack 30 and the fixing support 50 can be avoided or at least reduced, and the safety performance and service life of the battery pack assembly 3 and the battery fixing seat 5 are improved.

[0159] In this embodiment, the fixing bracket 50 is a frame structure. The locking mechanism 51 is fixed within the frame structure. Of course, in other embodiments, the fixing bracket 50 may also be a disc-shaped structure with annular sidewalls, a cuboid structure with an opening on the bottom surface, or a plate-shaped structure, which does not limit the scope of protection of this invention.

[0160] Locking mechanisms 51 are provided on both sides of the fixed bracket 50 along its length direction 90. The fixed seat buckle limiting assembly 52 located on the same side is spaced apart from the locking mechanism 51. The length direction 90 of the fixed bracket is approximately the same as the length direction of the electric vehicle.

[0161] In addition, the locking mechanism 51 generally includes a lock base 510, which has an opening and a cavity extending from the opening. The opening is for the locking part 31 installed in the battery pack 30 to enter the cavity.

[0162] Furthermore, multiple fixing seat latching and limiting components 52 are fixed to the side wall of the fixing bracket 50 located along the length direction 90 of the fixing bracket. More preferably, the multiple fixing seat latching and limiting components 52 are distributed on both side walls of the fixing bracket 50 located along the length direction 90 of the fixing bracket.

[0163] like Figures 6-7 As shown, the mounting bracket latching and limiting assembly 52 includes a mounting bracket latching and limiting part 520. The mounting bracket latching and limiting part 520 is fixed to the inner wall surface of the side wall of the fixing bracket 50 and is configured to latch onto the battery pack latching and limiting assembly 32. A mounting bracket receiving space 522 is provided between the mounting bracket latching and limiting part 520 and the inner wall surface of the side wall of the fixing bracket 50. In this embodiment, the mounting bracket latching and limiting part 520 is configured to latch onto the battery pack receiving space 322, and the mounting bracket receiving space 522 is configured to latch onto the battery pack latching and limiting part 320. Of course, in other alternative embodiments, the mounting bracket latching and limiting part 520 may be configured to latch onto the battery pack receiving space 322 independently, or the mounting bracket receiving space 522 may be configured to latch onto the battery pack latching and limiting part 320 independently.

[0164] The fixed seat accommodating space 522 has a fixed seat accommodating opening 523. The fixed seat accommodating opening 523 is located at the rear end of the fixed seat accommodating space 522 along the length direction 90 of the fixed support and at the bottom end of the fixed seat accommodating space 522 along the height direction 94 of the fixed support. The fixed seat accommodating opening 523 is used for the battery pack buckle limiting assembly 32 to enter and exit the fixed seat accommodating space 522, so that the battery pack buckle limiting part 320 can be buckled with the battery fixed seat 5, and the battery pack buckle limiting part 320 does not interfere with the battery fixed seat 5 before being installed in place. In other alternative embodiments, the fixed seat accommodating opening 523 can also be separately provided at the rear end of the fixed seat accommodating space 522 along the length direction 90 of the fixed support and at the bottom end of the fixed seat accommodating space 522 along the height direction 94 of the fixed support.

[0165] Specifically, the fixed seat buckle limiting part 520 extends along the length direction 90 of the fixed support and the height direction 94 of the fixed support. In this way, the area of the part where the battery pack buckle limiting part 320 is buckled with the fixed seat buckle limiting part 520 can be increased, thereby further improving the degree of restriction of the relative movement between the battery pack 30 and the fixed support in the width direction 72 of the battery pack. In the present embodiment, the fixed seat buckle limiting part 520 adopts a plate-shaped structure.

[0166] Further, the fixed seat buckle limiting part 520 has a fixed seat rear end face 521, and the fixed seat rear end face 521 has a fixed seat guide face which is an inclined plane. When the battery pack assembly 3 is installed on the battery fixed seat 5, the fixed seat guide face cooperates with the battery pack guide face to better play a guiding role during the movement of the battery pack buckle limiting part 320 relative to the battery fixed seat 5 along the length direction 70 of the battery pack, so as to ensure the installation reliability and accuracy of the two.

[0167] In addition, the fixed seat buckle limiting assembly 52 further includes a fixed seat protruding part 524. The fixed seat protruding part 524 is fixed to and protrudes from the inner wall face of the side wall of the fixed support, and the fixed seat buckle limiting part 520 is adjacent to the fixed seat protruding part 524.

[0168] Further, the fixed seat protruding part 524 and the fixed seat buckle limiting part 520 are integrally formed. The fixed seat protruding part 524 and the fixed seat buckle limiting part 520 both adopt a plate-shaped structure. The fixed seat protruding part 524 and the fixed seat buckle limiting part 520 are made of steel. Of course, in other alternative embodiments, the fixed seat protruding part 524 and the fixed seat buckle limiting part 520 can also be made of other materials according to actual needs.

[0169] Further, the fixed seat extension 524 is vertically arranged between the fixed seat buckle limiting part 520 and the side wall of the fixed support 50. The fixed seat extension 524 extends towards the battery pack 30 along the width direction 92 of the fixed support, and extends along the height direction 94 or length direction of the fixed support.

[0170] In addition, the fixed seat buckle limiting assembly 52 further comprises a fixed seat mounting part 525. The fixed seat mounting part 525 is fixed to the inner wall surface of the side wall of the fixed support 50. The fixed seat extension 524 is fixed to the fixed seat mounting part 525, and extends from the side of the fixed seat mounting part 525 facing the battery pack 30 towards the battery pack 30. The fixed seat buckle limiting part 520, the fixed seat extension 524 and the fixed seat mounting part 525 surround to form the fixed seat accommodating space 522.

[0171] As shown in FIG. 5, the inner wall surface of the side wall of the fixed support 50 in the length direction 90 of the fixed support has a protruding part 53, which protrudes from the inner wall surface of the fixed support 50. The protruding part 53 is fixed in the frame structure of the fixed support 50. Figure 6

[0172] According to an embodiment of the present application, a schematic structure of a quick-change support assembly 1 is shown. As shown in FIG. 1, the quick-change support assembly 1 comprises the battery pack assembly 3 as above and the battery fixed seat 5 as above. The battery pack assembly 3 is mounted on the battery fixed seat 5. Figures 8-9 Figures 8-9 It should be understood that the battery pack buckle limiting part 320 is clamped in the fixed seat accommodating space 522. Also, the fixed seat buckle limiting part 520 is clamped in the battery pack accommodating space 322. In this way, the relative displacement of the battery pack 30 and the fixed support 50 in the width direction 72 of the battery pack can be more reliably limited. In other alternative embodiments, the battery pack buckle limiting part 320 can also be clamped in the fixed seat accommodating space 522 alone, or the fixed seat buckle limiting part 520 can be clamped in the battery pack accommodating space 322 alone.

[0173] In addition, the battery pack buckle limiting part 320 and the fixed seat accommodating space 522 are gap-fitted. The fixed seat buckle limiting part 520 and the battery pack accommodating space 322 are gap-fitted. Specifically, the maximum gap of the gap-fitting is less than or equal to 0.5 mm. In other alternative embodiments, the battery pack buckle limiting part 320 and the fixed seat accommodating space 522 can also be separately provided as gap-fitting, or the fixed seat buckle limiting part 520 and the battery pack accommodating space 322 can also be separately provided as gap-fitting. Figure 10

[0174]

[0175] ​​​In addition, the battery pack accommodating opening 323 is used for the fixing seat buckle limiting part 520 to enter and exit the battery pack accommodating space 322. The fixing seat accommodating opening 523 is used for the battery pack buckle limiting part 320 to enter and exit the fixing seat accommodating space 522.

[0176] As shown in Figure 9 , the support limiting assembly 33 abuts against one side of the inner wall surface of the protruding part 53 away from the fixing support 50. In the embodiment, the convex surface of the convex part of the support limiting assembly 33 abuts against one side of the inner wall surface of the protruding part 53 away from the fixing support 50. Specifically, the outer side surface of the convex surface abuts against one side of the inner wall surface of the protruding part 53 away from the fixing support 50. As shown in Figure 9 , one side of the inner wall surface of the protruding part 53 away from the fixing support 50 is a plane.

[0177] As shown in Figures 8-10 , during the installation of the battery pack assembly 3 on the battery fixing seat 5, the battery pack assembly 3 is moved upward along the height direction of the battery fixing seat 5 under the action of external force, the battery pack buckle limiting assembly 32 and the support limiting assembly 33 are moved upward, the convex part of the battery pack buckle limiting assembly 32 and the support limiting assembly 33 is located in the space formed by the side wall of the battery pack and the side wall of the fixing support 50, and the convex part of the support limiting assembly 33 does not contact the fixing support 50 and the protruding part 53, the battery pack buckle limiting assembly 32 does not contact the fixing support 50, that is, the battery fixing seat 5 does not interfere with the convex part and the battery pack buckle limiting assembly 32, and at the same time, the locking part 31 enters the cavity through the opening of the locking mechanism 51; the battery pack assembly 3 is moved forward along the length direction of the battery fixing seat 5 under the action of external force, and after being installed in place, the battery pack buckle limiting assembly 32 is buckled with the fixing seat buckle limiting part 52, the convex surface of the convex part abuts against one side of the support base of the protruding part 53 away from the inner wall surface of the fixing support 50, and the locking part 31 is locked in the locking mechanism.

[0178] The application further provides an electric vehicle comprising the quick-change support assembly 1.

[0179] In summary, the battery pack assembly 3, the battery fixing seat 5, the quick-change support assembly 1 and the electric vehicle of the present application, the plurality of battery pack buckle limiting assemblies 32 are fixedly arranged on the two side walls in the length direction 70 of the battery pack 30, the plurality of fixing seat buckle limiting assemblies 52 are fixedly arranged on the two side walls in the length direction 90 of the fixing support 50, the fixing seat buckle limiting assembly 52 is buckled with the corresponding battery pack buckle limiting assembly 32, that is, the structure of left and right dead limiting (i.e. hard limiting or fixed limiting) in the width direction 72 of the battery pack is adopted between the battery pack 30 and the fixing support 50, so that when the electric vehicle is not running stably and the battery pack 30 tries to shake left and right, the battery pack buckle limiting assembly 32 on one side wall is subjected to the pressure applied by the buckled fixing seat buckle limiting assembly 52, the battery pack buckle limiting assembly 32 on the other side wall is subjected to the tension applied by the buckled fixing seat buckle limiting assembly 52, that is, the battery pack buckle limiting assemblies 32 on the two side walls are subjected to force at the same time, so that the relative displacement between the battery pack 30 and the fixing support 50 in the width direction 72 of the battery pack can be greatly reduced or almost avoided. Compared with the prior art, the difficulty of battery pack shaking is greater, and the displacement of the battery pack 30 can be avoided or at least weakened when the electric vehicle is not running stably (such as the electric vehicle turning too large or frequently), so that the abnormal noise or wear caused by the collision between the battery pack 30 and the fixing support 50 can be avoided or at least reduced, thereby improving the safety performance and service life of the battery pack assembly 3 and the battery fixing seat 5.

[0180] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0181] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and such changes and modifications all fall within the protection scope of the present application.

Claims

1. A battery pack assembly comprising a battery pack and a locking part, the locking part being used to lock the battery pack within a locking mechanism of a battery mounting base to limit relative displacement between the battery pack and the battery mounting base in a first direction and a second direction, the first direction being perpendicular to the second direction, characterized in that, The battery pack assembly also includes: Multiple battery pack latching and limiting components are fixed to the battery pack. The battery pack latching and limiting components are configured to latch onto the battery mounting base to limit the relative displacement between the battery pack and the battery mounting base only in a third direction perpendicular to the first direction and the second direction. The first direction is the length direction of the battery pack, the second direction is the height direction of the battery pack, and the third direction is the width direction of the battery pack. The battery pack latching and limiting assembly includes a battery pack latching and limiting part and a battery pack protrusion part. The battery pack latching and limiting part is fixed to the outer wall surface of the side wall of the battery pack. The battery pack protrusion part is fixed to and protrudes from the outer wall surface of the side wall of the battery pack. The battery pack latching and limiting part is adjacent to the battery pack protrusion part and forms an L-shaped structure with the battery pack latching and limiting part, which only restricts the relative displacement of the battery fixing seat in the third direction.

2. The battery pack assembly as described in claim 1, characterized in that, The battery pack buckle limiting part is configured to be snapped into the battery fixing seat, and there is a battery pack accommodating space between the battery pack buckle limiting part and the outer wall surface of the side wall of the battery pack.

3. The battery pack assembly as described in claim 2, characterized in that, The battery pack receiving space has a battery pack receiving opening, which is located at the front end of the battery pack receiving space along the length direction of the battery pack and / or at the top end of the battery pack receiving space along the height direction of the battery pack. And / or, the battery pack buckle limiting portion extends along the length direction and the height direction of the battery pack; And / or, the battery pack buckle limiting part has a battery pack front end face, the battery pack front end face has a battery pack guide surface, and the battery pack guide surface is an inclined plane; And / or, the battery pack buckle limiting part adopts a plate-like structure.

4. The battery pack assembly as described in claim 2, characterized in that, The battery pack protrusion and the battery pack buckle limiting part are integrally formed; And / or, both the battery pack protrusion and the battery pack buckle limiting part adopt a plate-like structure; And / or, the battery pack protrusion and the battery pack buckle limiting part are made of steel; And / or, the battery pack protrusion is vertically disposed between the battery pack buckle limiting part and the side wall of the battery pack; And / or, the battery pack protrusion extends toward the battery holder along the width direction of the battery pack and extends along the height or length direction of the battery pack.

5. The battery pack assembly as described in claim 2, characterized in that, The battery pack latching and limiting assembly also includes: The battery pack mounting part is fixed to the outer wall of the side wall of the battery pack. The battery pack extension is fixed to the battery pack mounting part and extends from the side of the battery pack mounting part facing the battery mounting seat toward the battery mounting seat. The battery pack accommodating space is formed around the battery pack buckle limiting part, the battery pack extension, and the battery pack mounting part.

6. The battery pack assembly as described in claim 1, characterized in that, The battery pack buckle limiting assembly located on the same side wall has at least two components, and the battery pack buckle limiting assembly is provided at both ends of the side wall located in the length direction of the battery pack.

7. The battery pack assembly as described in claim 6, characterized in that, The battery pack buckle limiting assembly located on the same side wall has at least three components, and the battery pack buckle limiting assembly is also provided in the middle of the side wall located in the length direction of the battery pack.

8. The battery pack assembly as described in claim 1, characterized in that, The battery pack buckle limiting components are symmetrically arranged on both side walls; And / or, in the battery pack buckle limiting assembly and the locking part located on the same side wall, the battery pack buckle limiting assembly and the locking part are spaced apart in the length direction of the battery pack.

9. The battery pack assembly as described in claim 1, characterized in that, The battery pack assembly also includes: Multiple support and limiting components are fixed to the two side walls of the battery pack along the length direction of the battery pack. The support and limiting components are configured to abut against the inner wall surface of the side wall of the battery holder along the length direction of the battery holder, so as to limit the relative displacement between the battery pack and the battery holder in the width direction of the battery pack. In the support limiting component and the battery pack snap-fit ​​limiting component located on the same side wall of the battery pack, the support limiting component and the battery pack snap-fit ​​limiting component are spaced apart in the length direction of the battery pack.

10. The battery pack assembly as described in claim 9, characterized in that, The support limiting component is fixed to the end of the side wall of the battery pack located in the length direction of the battery pack, so as to limit the relative displacement between the ends of the battery pack and the battery fixing seat located adjacent to each other in the width direction of the battery pack. And / or, the support limiting component is provided at both ends of the sidewall located in the length direction of the battery pack; And / or, the support limiting components located on the two side walls are symmetrically arranged; And / or, the support limiting component includes a protrusion that protrudes from the outer wall surface of the side wall of the battery pack, the protrusion having a convex surface for abutting against the inner wall surface of the side wall of the battery holder.

11. The battery pack assembly as described in any one of claims 1-10, characterized in that, The battery pack assembly also includes: Multiple battery swapping guide and limiting components are fixedly disposed on the two side walls of the battery pack along the length direction of the battery pack. The battery swapping guide and limiting components are configured to abut against the inner wall surface of the side wall of the battery holder along the length direction of the battery holder, so as to clamp the battery pack in the battery holder. In the battery pack latching limiting assembly and the battery swapping guide limiting assembly located on the same side wall of the battery pack, the battery swapping guide limiting assembly and the battery pack latching limiting assembly are spaced apart in the length direction of the battery pack; And / or, a plurality of the battery pack buckle limiting components are fixed to the side wall of the battery pack along the length direction of the battery pack, and the plurality of the battery pack buckle limiting components are distributed on the two side walls of the battery pack along the length direction of the battery pack.

12. A battery holder, the battery holder comprising a fixing bracket and a locking mechanism, the locking mechanism being fixedly disposed on the fixing bracket, characterized in that, The battery mounting bracket is used to install on the body of the electric vehicle to secure the battery pack assembly as described in any one of claims 1-11; The battery mounting bracket also includes: Multiple fixing seat buckle limiting components are fixedly mounted on the fixing bracket. Each of the multiple fixing seat buckle limiting components is arranged in a one-to-one correspondence with a multiple battery pack buckle limiting component. The fixing seat buckle limiting component is configured to engage with the corresponding battery pack buckle limiting component to limit the relative displacement of the battery pack and the fixing bracket in the width direction of the battery pack.

13. The battery holder as described in claim 12, characterized in that, The fixed base buckle limiting assembly includes: The fixed seat buckle limiting part is fixed to the inner wall surface of the side wall of the fixed bracket and is configured to be snapped into the battery pack buckle limiting assembly. There is a fixed seat receiving space between the fixed seat buckle limiting part and the inner wall surface of the side wall of the fixed bracket.

14. The battery holder as described in claim 13, characterized in that, The fixing seat receiving space has a fixing seat receiving opening, which is located at the rear end of the fixing seat receiving space along the length direction of the fixing bracket and / or at the bottom end of the fixing seat receiving space along the height direction of the fixing bracket. The fixing seat receiving opening allows at least a portion of the battery pack buckle limiting assembly to enter and exit the fixing seat receiving space. And / or, the fixing seat buckle limiting part extends along the length direction of the fixing bracket and the height direction of the fixing bracket; And / or, the fixing seat buckle limiting part has a fixing seat rear end face, the fixing seat rear end face has a fixing seat guide surface, and the fixing seat guide surface is an inclined plane; And / or, the fixing seat buckle limiting part adopts a plate-shaped structure.

15. The battery holder as described in claim 13, characterized in that, The fixed base buckle limiting assembly also includes: The fixed seat protrusion is fixed to and protrudes from the inner wall surface of the side wall of the fixed bracket, and the fixed seat snap-fit ​​limiting part is adjacent to the fixed seat protrusion.

16. The battery holder as described in claim 15, characterized in that, The protruding part of the fixed seat and the snap-fit ​​limiting part of the fixed seat are integrally formed; And / or, both the protruding part of the fixing seat and the snap-fit ​​limiting part of the fixing seat adopt a plate-like structure; And / or, the material of the protruding part of the fixing seat and the snap-fit ​​limiting part of the fixing seat is steel; And / or, the protruding part of the fixing seat is vertically disposed between the fixing seat buckle limiting part and the side wall of the fixing bracket; And / or, the mounting bracket protrusion extends toward the battery pack along the width direction of the mounting bracket and along the height or length direction of the mounting bracket.

17. The battery holder as described in claim 15, characterized in that, The fixing seat buckle limiting assembly also includes a fixing seat mounting part, which is fixed to the inner wall surface of the side wall of the fixing bracket. The fixing seat protrusion is fixed to the fixing seat mounting part and extends from the side of the fixing seat mounting part facing the battery pack toward the battery pack. The fixing seat receiving space is formed around the fixing seat buckle limiting part, the fixing seat protrusion and the fixing seat mounting part.

18. The battery holder as described in claim 12, characterized in that, Multiple fixing seat buckle limiting components are fixed to the side wall of the fixing bracket along the length direction of the fixing bracket, and the multiple fixing seat buckle limiting components are distributed on both side walls of the fixing bracket along the length direction of the fixing bracket.

19. A quick-change bracket assembly, characterized in that, It includes the battery pack assembly as described in any one of claims 1-11 and the battery mounting bracket as described in any one of claims 12-18.

20. A quick-change bracket assembly, characterized in that, It includes the battery pack assembly as described in claim 2 and the battery mounting bracket as described in claim 13; The battery pack buckle limiting part is engaged in the fixed seat receiving space, and / or the fixed seat buckle limiting part is engaged in the battery pack receiving space.

21. The quick-change bracket assembly as described in claim 20, characterized in that, The battery pack buckle limiting part and the fixed seat accommodating space are in clearance fit, and / or the fixed seat buckle limiting part and the battery pack accommodating space are in clearance fit.

22. The quick-change bracket assembly as described in claim 21, characterized in that, The maximum clearance of the clearance fit is less than or equal to 0.5 mm.

23. The quick-change bracket assembly as described in any one of claims 20-22, characterized in that, The battery pack receiving space has a battery pack receiving opening, which is used for the fixing seat buckle limiting part to enter and exit the battery pack receiving space; The mounting space has a mounting opening for the battery pack buckle limiting part to enter and exit the mounting space.

24. An electric vehicle, characterized in that, It includes the quick-change bracket assembly as described in any one of claims 19-23.

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