CN110752326A

CN110752326A - Battery pack assembly, battery fixing seat, quick-change bracket assembly and electric vehicle

Info

Publication number: CN110752326A
Application number: CN201810814092.5A
Authority: CN
Inventors: 黄春华
Original assignee: Aulton New Energy Automotive Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd
Priority date: 2018-07-23
Filing date: 2018-07-23
Publication date: 2020-02-04

Abstract

The invention discloses a battery pack assembly, a battery fixing seat, a quick-change bracket assembly and an electric vehicle. The battery pack assembly comprises a battery pack, a locking part and a plurality of battery pack buckle limiting components, wherein the locking part is used for limiting the relative positions of the battery pack and the battery fixing seat in the first direction and the second direction, and the battery pack buckle limiting components are arranged in a clamped mode on the battery fixing seat so as 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, and the fixing seat buckle limiting components are arranged to be clamped with the battery pack buckle limiting components. The invention can avoid or at least weaken the displacement of the battery pack when the electric vehicle runs in a non-steady state, thereby avoiding or at least reducing abnormal sound or abrasion caused by collision between the battery pack and the fixed support, and further improving the safety performance and the service life of the battery pack assembly and the battery fixing seat.

Description

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

Technical Field

The invention relates to the field of electric automobiles, in particular to a battery pack assembly, a battery fixing seat, a quick-change bracket assembly and an electric automobile.

Background

An existing electric vehicle generally includes a battery pack assembly and a battery holder for mounting the battery pack assembly. The battery fixing seat comprises a fixing support and a locking mechanism, and the locking mechanism is arranged on the side wall, located in the length direction of the fixing support, in the fixing support. The battery pack assembly comprises a battery pack, a lock shaft and a guide positioning block, wherein the lock shaft and the guide positioning block are arranged on the side wall of the battery pack in the length direction, and the lock shaft is locked in the locking mechanism. The guide positioning piece includes: a guide positioning component and an elastic component. The elastic member is connected between the guide positioning member and the side wall of the battery pack. The guiding and positioning component can overcome the elastic force of the elastic component to move close to the side wall of the battery pack or move far away from the side wall of the battery pack through the elastic recovery of the elastic component, and the guiding and positioning component is used for abutting against the side wall of the fixing support, so that the positioning and guiding are realized.

However, the following drawbacks exist with this form of construction: because the deformation direction of elastomeric element is the width direction of battery package promptly, when electric motor car is not steadily gone if too big or frequent the time of turning angle, elastomeric element directly receives the extrusion of battery fixing base and takes place to warp along the width direction of battery package for the battery package produces the displacement and even produces the collision with the battery fixing base, thereby causes abnormal sound or wearing and tearing, has reduced its life and security performance.

Disclosure of Invention

The invention aims to overcome the defect that potential safety hazards are caused by the fact that a battery pack is easy to displace when an electric vehicle runs unstably in the prior art, and provides a battery pack assembly, a battery fixing seat, a quick-change bracket assembly and an electric vehicle.

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

a battery pack assembly comprising a battery pack and a locking portion for locking the battery pack within a locking mechanism of a battery holder to limit relative displacement of the battery pack and the battery holder in a first direction and a second direction, the first direction being perpendicular to the second direction, the battery pack assembly further comprising:

the battery pack clamping and limiting assembly is arranged on the battery pack in a clamping mode, and the battery pack clamping and limiting assembly is arranged on the battery fixing seat in a clamping mode so as 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.

In this scheme, set firmly a plurality of battery package buckle spacing subassemblies in the battery package, the battery package buckle spacing subassembly sets to the card and locates battery holder, has adopted the structure of dying spacing (hard spacing or fixed spacing promptly) about the third direction between battery package and the battery holder promptly to can to a great extent restrict the relative motion in the third direction between battery package and the battery holder. The displacement of the battery pack can be avoided or at least weakened when the electric vehicle runs non-stably (such as when the turning angle of the electric vehicle is too large or frequent), so that abnormal sound or abrasion caused by collision between the battery pack and the fixed support can be avoided or at least reduced, and the safety performance and the service life of the battery pack assembly and the battery fixing seat are further improved.

Preferably, the battery pack buckle limiting component comprises:

the battery pack clamping and buckling limiting part is fixed on the outer wall surface of the side wall of the battery pack and is arranged to be clamped on the battery fixing seat, and a battery pack accommodating space is formed between the battery pack clamping and buckling limiting part and the outer wall surface of the side wall of the battery pack.

In this scheme, battery package accommodation space has between the outer wall of the lateral wall of battery package buckle spacing portion and battery package, simple structure to can restrict the relative motion of battery package and battery fixing base in the third direction very reliably.

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

and/or the battery pack buckle limiting part extends along the length direction of the battery pack and the height direction of the battery pack;

and/or the battery pack buckle limiting part is provided with a battery pack front end face, the battery pack front end face is provided with a battery pack guide face, and the battery pack guide face is an inclined plane;

and/or the battery pack buckle limiting part adopts a plate-shaped structure.

In this scheme, the battery contains and receives the opening and can supply at least part entering battery of battery fixing base to contain and receive the space to make spacing portion of battery package buckle can block mutually with the battery fixing base and establish, and can not produce the interference effect to the battery fixing base before the spacing portion installation of battery package buckle targets in place.

The battery pack buckle limiting part extends along the length direction of the battery pack and the height direction of the battery pack, the area of the battery pack buckle limiting part and the area of the battery fixing seat clamped part can be increased, and therefore the limiting degree of relative movement between the battery pack and the battery fixing seat in the width direction of the battery pack is further improved.

The battery pack front end face is provided with a battery pack guide face which is an inclined plane, when the battery pack assembly is installed on the battery fixing seat, the battery pack buckle limiting portion moves relative to the battery fixing seat along the length direction of the battery pack, and the battery pack guide face can better play a role in guiding so as to ensure the installation reliability and precision of the battery pack and the battery pack.

Preferably, the battery pack buckle limiting component further comprises:

the battery pack comprises a battery pack extension part, wherein the battery pack extension part is fixed on and protrudes out of the outer wall surface of the side wall of the battery pack, and the battery pack clamping limiting part is adjacent to the battery pack extension part.

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

and/or the battery pack protruding part and the battery pack buckle limiting part both adopt plate-shaped structures;

and/or the battery pack extending part and the battery pack buckle limiting part are made of steel;

and/or the battery pack extension part is vertically arranged between the battery pack buckle limiting part and the side wall of the battery pack;

and/or the battery pack extension 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.

Preferably, the battery pack buckle limiting component further comprises:

battery package installation department, battery package installation department is fixed in the outer wall of the lateral wall of battery package, battery package extension is fixed in the battery package installation department, and follow in the battery package installation department towards the one side orientation of battery fixing base the battery fixing base extends, just battery package buckle spacing portion the battery package extension and around being formed with between the battery package installation department battery package accommodation space.

Preferably, the battery pack buckling limiting assemblies on the same side wall are at least two, and the battery pack buckling limiting assemblies are arranged at two end parts of the side wall of the battery pack in the length direction. Can directly restrict like this between the tip that battery package and battery fixing base are adjacent sets up the relative motion on the width direction of electric motor car to make and to avoid producing the collision between the tip that battery package and battery fixing base set up relatively under the too big or frequent condition of electric motor car turning angle, thereby reduced the wearing and tearing that battery package and battery fixing base produced, improved the life of battery package and fixed bolster.

Preferably, the number of the battery pack buckle limiting assemblies on the same side wall is at least three, and the battery pack buckle limiting assemblies are also arranged in the middle of the side wall of the battery pack in the length direction.

Preferably, the battery pack buckle limiting components respectively positioned on the two side walls are symmetrically arranged;

and/or the battery pack buckle limiting assembly and the locking part are positioned on the same side wall, and the battery pack buckle limiting assembly and the locking part are arranged at intervals in the length direction of the battery pack.

In this scheme, be located the spacing subassembly symmetry setting of battery package buckle of both sides wall respectively, can draw and the spacing subassembly symmetry of pressurized battery package buckle by the left and right sides to can further improve the spacing effect of battery package and battery fixing base on the width direction of battery package.

Preferably, the battery pack assembly further includes:

the supporting and limiting assemblies are fixedly arranged on two side walls of the battery pack in the length direction of the battery pack and are arranged to abut against the inner wall surfaces of the side walls of the battery fixing seat in the length direction of the battery fixing seat so as to limit the relative displacement of the battery pack and the battery fixing seat in the width direction of the battery pack;

in the supporting and limiting assembly and the battery pack clamping and limiting assembly which are positioned on the same side wall of the battery pack, the supporting and limiting assembly and the battery pack clamping and limiting assembly are arranged at intervals in the length direction of the battery pack.

In this scheme, will support spacing subassembly and set firmly the both sides wall that lies in the length direction of battery package in the battery package, and support and lean on in battery fixing base, can restrict the whole relative motion of battery package on the width direction of electric motor car with battery fixing base is whole like this, thereby can further restrict the relative motion in the width direction of electric motor car between battery package and the battery fixing base, thereby make and to avoid producing the collision between battery package and the battery fixing base under the too big or frequent condition of electric motor car turning angle, thereby the wearing and tearing that battery package and battery fixing base produced have been reduced, the life of battery package and battery fixing base has been improved.

Preferably, the supporting and limiting assembly is fixedly arranged at the end part 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 parts of the battery pack adjacent to the battery fixing seat in the width direction of the battery pack;

and/or the two end parts of the side wall of the battery pack, which are positioned in the length direction of the battery pack, are provided with the supporting and limiting assemblies;

and/or the supporting and limiting components respectively positioned on the two side walls are symmetrically arranged;

and/or, support spacing subassembly and include the convex closure, the convex closure is protruding to be located the outer wall surface of the lateral wall of battery package, the convex closure has the convex surface, the convex surface be used for leaning on in the internal face of the lateral wall of battery fixing base.

In this scheme, will support spacing subassembly and set firmly the tip that lies in the lateral wall on the length direction of battery package in the battery package, thereby can directly restrict the relative motion on the width direction of electric motor car between the tip that battery package and battery fixing base adjacent set up, thereby make and to avoid producing the collision between the tip that battery package and battery fixing base set up relatively under the too big or frequent condition of electric motor car turning angle, thereby the wearing and tearing that battery package and battery fixing base produced have been reduced, the life of battery package and battery fixing base has been improved.

Meanwhile, two end parts of the side wall of the battery pack, which are positioned in the length direction of the battery pack, are respectively provided with a supporting and limiting assembly, so that relative movement between the two end parts of the battery pack, which are adjacent to the battery fixing seat, in the width direction of the electric vehicle can be more reliably limited.

The convex hull is convexly arranged on the outer wall surface of the side wall of the battery pack, and can provide a hard support for the battery pack so as to more reliably limit the relative movement between the battery pack and the end part, adjacent to the battery fixing seat, in the width direction of the electric vehicle.

Preferably, the battery pack assembly further includes:

the battery replacing guide limiting assemblies are fixedly arranged on two side walls of the battery pack in the length direction of the battery pack and 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;

in the battery pack buckle limiting assembly and the battery replacement guide limiting assembly which are positioned on the same side wall of the battery pack, the battery replacement guide limiting assembly and the battery pack buckle limiting assembly are arranged at intervals in the length direction of the battery pack;

and/or the battery pack buckle limiting assemblies are fixed on the side walls of the battery pack in the length direction of the battery pack, preferably, the battery pack buckle limiting assemblies are distributed on the two side walls of the battery pack in the length direction of the battery pack;

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.

In this scheme, trade the spacing subassembly of electricity direction and play the guide effect in battery package assembly installation, play the effect that spacing clamp was tight to support the battery fixing base in the width direction of electric motor car after the installation of battery package assembly is accomplished to guarantee that the electric motor car can install in the battery fixing base very reliably under the circumstances of normally traveling battery package assembly.

It is a plurality of the spacing subassembly of battery package buckle distribute in lie in the battery package the both sides wall on the length direction of battery package, when the electric motor car non-stationary operation battery package is tried to rock about, the spacing subassembly of battery package buckle that lies in on one of them lateral wall receives pressure like this, the spacing subassembly of battery package buckle that lies in on another lateral wall receives the pulling force, lie in the spacing subassembly of battery package buckle simultaneous atress of both sides wall promptly, can reduce to a great extent or almost avoid the relative displacement on the width direction of battery package between battery package and the battery fixing base like this.

The invention also provides a battery fixing seat which comprises a fixing support and a locking mechanism, wherein the locking mechanism is fixedly arranged on the fixing support, and the battery fixing seat is used for being arranged on the body of an electric vehicle to fix the battery pack assembly;

the battery holder further includes:

the battery pack fixing device comprises a plurality of fixing seat buckle limiting assemblies, wherein the fixing seat buckle limiting assemblies are fixedly arranged on a fixing support, the fixing seat buckle limiting assemblies are arranged on the fixing support in a one-to-one correspondence mode, the fixing seat buckle limiting assemblies are arranged to be corresponding to the battery pack buckle limiting assemblies, and the battery pack is clamped by the battery pack buckle limiting assemblies to limit relative displacement of the battery pack and the fixing support in the third direction.

In this scheme, set firmly the spacing subassembly of a plurality of battery package buckles in the battery package, set firmly the spacing subassembly of a plurality of fixing base buckles in the fixed bolster, the spacing subassembly of fixing base buckle is blocked mutually with the spacing subassembly of corresponding battery package buckle and is established, has adopted the structure of dying spacing (hard spacing or fixed spacing promptly) about the third direction between battery package and the battery fixing base promptly to can to a great extent limit the relative motion between battery package and the battery fixing base in the third direction. That is to say, for prior art, the degree of difficulty that the battery package rocked can be great, and the displacement of battery package can be avoided or at least weakened when electric motor car non-even running (for example electric motor car turn angle is too big or frequent) to can avoid or reduce at least because of the abnormal sound or the wearing and tearing that battery package and fixed bolster produced the collision and cause, and then improve the security performance and the life of battery package assembly and battery fixing base.

Preferably, the fixing seat buckle limiting component comprises:

the fixing seat buckle limiting part is fixed on the inner wall surface of the side wall of the fixing support and is arranged to be clamped on the battery pack buckle limiting component, and a fixing seat accommodating space is formed between the fixing seat buckle limiting part and the inner wall surface of the side wall of the fixing support.

Preferably, the holder accommodating space has a holder accommodating opening, the holder accommodating opening is located at the rear end of the holder accommodating space in the length direction of the fixing bracket and/or at the bottom end of the holder accommodating space in the height direction of the fixing bracket, and at least part of the battery pack fastening limiting assembly enters and exits the holder accommodating space through the holder accommodating opening;

and/or the fixing seat buckle limiting part extends along the length direction of the fixing support and the height direction of the fixing support;

and/or the fixing seat buckle limiting part is provided with a fixing seat rear end face, the fixing seat rear end face is provided with 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.

Preferably, the fixing seat buckle limiting component further comprises:

the fixing seat comprises a fixing seat extending part, wherein the fixing seat extending part is fixed on the inner wall surface of the side wall of the fixing support and protrudes out of the inner wall surface of the side wall of the fixing support, and the fixing seat buckle limiting part is adjacent to the fixing seat extending part.

Preferably, the fixing seat extending part and the fixing seat buckle limiting part are integrally formed;

and/or the fixed seat extension part and the fixed seat buckle limiting part both adopt plate-shaped structures;

and/or the fixing seat extending part and the fixing seat buckle limiting part are made of steel;

and/or the fixing seat extension part is vertically arranged between the fixing seat buckle limiting part and the side wall of the fixing support;

and/or the fixing seat extending part extends towards the battery pack along the width direction of the fixing support and extends along the height direction or the length direction of the fixing support.

Preferably, the spacing subassembly of fixing base buckle still includes the fixing base installation department, the fixing base installation department is fixed in the internal face of fixed bolster's lateral wall, the fixing base extension is fixed in the fixing base installation department, and follow in the fixing base installation department towards the one side orientation of battery package the battery package extends, just the spacing portion of fixing base buckle the fixing base extension and around being formed with between the fixing base installation department the fixing base accommodation space.

Preferably, the plurality of fixing seat buckle limiting assemblies are fixed on the side wall of the fixing support in the length direction of the fixing support, and preferably, the plurality of fixing seat buckle limiting assemblies are distributed on the two side walls of the fixing support in the length direction of the fixing support.

The invention also provides a quick-change bracket assembly which comprises the battery pack assembly and the battery fixing seat.

The invention also provides a quick-change bracket assembly, which comprises the battery pack assembly and the battery fixing seat;

the battery pack buckle limiting part is clamped in the fixing seat accommodating space, and/or the fixing seat buckle limiting part is clamped in the battery pack accommodating space.

Preferably, the battery pack buckle limiting part and the fixing seat accommodating space are in clearance fit, and/or the fixing seat buckle limiting part and the battery pack accommodating space are in clearance fit.

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

Preferably, the battery pack accommodating space has a battery pack accommodating opening, and the battery pack accommodating opening is used for allowing the fixing seat buckle limiting part to enter and exit the battery pack accommodating space;

the fixing seat accommodating space is provided with a fixing seat accommodating opening, and the fixing seat accommodating opening supplies the battery pack buckle limiting part to enter and exit the fixing seat accommodating space.

The invention also provides an electric vehicle which comprises the quick-change bracket assembly.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

according to the battery pack assembly, the battery fixing seat, the quick-change support assembly and the electric vehicle, the battery pack buckle limiting assemblies are fixedly arranged on the battery pack, the fixing seat buckle limiting assemblies are fixedly arranged on the fixing support, the fixing seat buckle limiting assemblies are clamped with the corresponding battery pack buckle limiting assemblies, namely, a structure of limiting left and right in a third direction (namely rigid limiting or fixed limiting) is adopted between the battery pack and the fixing support, so that the relative movement between the battery pack and the fixing support in the third direction can be limited to a large extent. That is to say, for prior art, the degree of difficulty that the battery package rocked can be great, and the displacement of battery package can be avoided or at least weakened when electric motor car non-even running (for example electric motor car turn angle is too big or frequent) to can avoid or reduce at least because of the abnormal sound or the wearing and tearing that battery package and fixed bolster produced the collision and cause, and then improve the security performance and the life of battery package assembly and battery fixing base.

In addition, set firmly the spacing subassembly of a plurality of battery package buckles in the battery package lie in the both sides wall on the length direction of battery package, set firmly the spacing subassembly of a plurality of fixing base buckles in the both sides wall that lies in the length direction of fixed bolster in the fixed bolster, when the electric motor car non-even running battery package is tried to rock about, the spacing subassembly of battery package buckle that lies in on one of them lateral wall receives the spacing subassembly of fixing base buckle that the looks card established and applys pressure, the spacing subassembly of battery package buckle that lies in on another lateral wall receives the spacing subassembly of fixing base buckle that the looks card established and applys pulling force, the spacing subassembly of battery package buckle that lies in the both sides wall atress simultaneously promptly, can reduce to a great extent like this or almost avoid between battery package and the fixed bolster in the relative displacement of battery package in. The battery pack shaking difficulty is further increased, and the displacement of the battery pack can be further avoided or at least weakened when the electric vehicle runs non-stably (such as the electric vehicle is too large in turning angle or frequent), so that abnormal sound or abrasion caused by collision between the battery pack and the fixed support can be further avoided or at least reduced, and the safety performance and the service life of the battery pack assembly and the battery fixing seat are further improved.

Drawings

Fig. 1 is a schematic perspective view of a battery pack assembly in a position state according to a preferred embodiment of the invention.

Fig. 2 is a schematic perspective view of a battery pack assembly in another position according to a preferred embodiment of the invention.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic structural view of a battery pack buckle limiting component of the battery pack assembly according to the preferred embodiment of the invention.

Fig. 5 is a schematic perspective view of a battery holder according to a preferred embodiment of the invention.

Fig. 6 is an enlarged schematic view of a portion B in fig. 5.

Fig. 7 is a schematic structural view of a fixing seat buckle limiting portion of a battery fixing seat according to a preferred embodiment of the invention.

Fig. 8 is a schematic structural view of a quick-change holder assembly according to a preferred embodiment of the invention.

Fig. 9 is an enlarged schematic view of a portion C in fig. 8.

Fig. 10 is a schematic structural view of the fixing seat buckle limiting component and the battery pack buckle limiting component of the quick-change bracket assembly according to the preferred embodiment of the invention.

Description of reference numerals:

quick change support assembly: 1

The battery pack assembly: 3

A battery pack: 30

A locking portion: 31

Battery package buckle spacing subassembly: 32

The battery pack is buckled with a limiting part: 320

The front end face of the battery pack: 321

The battery container receiving space: 322

The battery container receiving opening: 323

Battery pack extension: 324

Battery package installation department: 325

Supporting a limiting assembly: 33

Trade the spacing subassembly of electric guide: 34

Guiding and installing the shell: 340

Guiding a limiting part: 341

A battery fixing seat: 5

Fixing a support: 50

A locking mechanism: 51

A lock base: 510

Fixing base buckle limiting component: 52

The spacing portion of fixing base buckle: 520

Fixing base rear end face: 521

Fixing seat accommodating space: 522

The fixing seat accommodating opening: 523

Fixing base extension: 524

Fixing seat installation part: 525

A projection part: 53

Length direction of battery pack: 70

Width direction of battery pack: 72

Height direction of the battery pack: 74

Length direction of the fixing bracket: 90

Width direction of the fixing bracket: 92

Height direction of the fixing bracket: 94

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Fig. 1-2 show a schematic structure of a battery pack assembly 3 according to an embodiment of the present invention. As shown in fig. 1-2, the battery pack assembly 3 includes a battery pack 30, a locking portion 31, and a plurality of battery pack snap retention members 32. The locking portion 31 is used to lock the battery pack 30 in the locking mechanism of the battery holder 5 to limit the relative displacement of the battery pack 30 and the battery holder 5 in the first direction and the second direction. The first direction is perpendicular to the second direction. In the present embodiment, the lock portion 31 is a lock shaft. The locking portions 31 are fixed to both side walls of the battery pack 30 in the longitudinal direction 70 of the battery pack.

The battery pack buckle limiting assemblies 32 are fixedly arranged on the battery pack 30, and the battery pack buckle limiting assemblies 32 are arranged to be clamped on the battery fixing seat 5 so as to limit the relative displacement of the battery pack 30 and the battery fixing seat 5 in a third direction perpendicular to the first direction and the second direction. Namely, a structure of a left-right dead limit (i.e., a hard limit or a fixed limit) in the third direction is adopted between the battery pack 30 and the battery holder 5, so that the relative movement between the battery pack 30 and the battery holder 5 in the third direction can be limited to a great extent. When the electric vehicle is not in smooth operation (for example, when the turning angle of the electric vehicle is too large or frequent), the displacement of the battery pack 30 can be avoided or at least weakened, so that abnormal sound or abrasion caused by collision between the battery pack 30 and the fixing bracket 50 of the battery fixing seat 5 can be avoided or at least reduced, and the safety performance and the service life of the battery pack assembly 3 and the battery fixing seat 5 are further improved.

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.

It should be understood that, when the battery pack assembly 3 is mounted on the battery holder 5, the length direction 70 of the battery pack is the same as or substantially the same as the length direction of the battery holder 5, and is the same as or substantially the same as the length direction of the electric vehicle, wherein the front end refers to one end close to the head of the electric vehicle, and the rear end refers to one end close to the tail 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 holder 5 and the width direction of the electric vehicle; the height direction 74 of the battery pack is the same as or substantially the same as the height direction of the battery holder 5, and the height direction of the electric vehicle is the same as or substantially the same.

The plurality of battery pack snap retention assemblies 32 are secured to the side walls of the battery pack 30 in the length direction 70 of the battery pack. Further, the battery pack buckling limiting assemblies 32 are distributed on two side walls of the battery pack 30 in the length direction 70 of the battery pack. When the battery pack 30 in non-steady operation of the electric vehicle tries to shake left and right, the battery pack buckle limiting component 32 on one side wall is stressed, the battery pack buckle limiting component 32 on the other side wall is stressed, namely the battery pack buckle limiting components 32 on the two side walls are stressed simultaneously, and therefore the relative displacement between the battery pack 30 and the battery fixing seat 5 in the width direction 72 of the battery pack can be reduced or almost avoided to a great extent.

In addition, the battery pack snap-in retainer assembly 32 on the same side wall has at least two. The battery pack 30 is provided with battery pack snap limiting assemblies 32 at both ends of the side wall in the length direction 70 of the battery pack. Can directly restrict like this between the tip that battery package 30 and battery fixing base 5 adjacent set up the relative motion on the width direction of electric motor car to make and can avoid producing the collision between the tip that battery package 30 and battery fixing base 5 set up relatively under the too big or frequent condition of electric motor car turning angle, thereby reduced the wearing and tearing that battery package 30 and battery fixing base 5 produced, improved battery package 30 and battery fixing base 5's life.

Further, the number of the battery pack buckling limiting assemblies 32 on the same side wall is at least three, and the battery pack 30 is also provided with the battery pack buckling limiting assemblies 32 in the middle of the side wall in the length direction 70 of the battery pack.

In addition, the battery pack buckle limiting components 32 respectively positioned on the two side walls are symmetrically arranged. The battery pack buckle limiting assembly 32 which can be pulled and pressed at the left side and the right side is 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.

Further, in the battery pack catch stopper assembly 32 and the locking portion 31 located on the same side wall, the battery pack catch stopper assembly 32 and the locking portion 31 are provided at an interval in the length direction 70 of the battery pack.

As shown in fig. 3-4, the battery pack snap stop assembly 32 includes a battery pack snap stop 320. The battery pack fastening limiting part 320 is fixed on the outer wall surface of the side wall of the battery pack 30 and is arranged to be fastened on the battery holder 5. A battery pack accommodating space 322 is provided between the battery pack engagement limiting portion 320 and the outer wall surface of the side wall of the battery pack 30. The structure is simple, and the relative movement of the battery pack 30 and the battery holder 5 in the third direction can be very reliably limited.

Wherein the battery pack receiving space 322 has a battery pack receiving opening 323. The battery pack receiving opening 323 is located at the front end of the battery pack receiving space 322 in the length direction 70 of the battery pack and at the top end of the battery pack receiving space 322 in the height direction 74 of the battery pack. The battery pack receiving opening 323 can allow at least a portion of the battery holder 5 to enter the battery pack receiving space 322, so that the battery pack retaining portion 320 and the battery holder 5 can be engaged with each other, and the battery pack retaining portion 320 does not interfere with the battery holder 5 before being installed in place. In other alternative embodiments, the battery pack receiving opening 323 may be separately provided at the front end of the battery pack receiving space 322 in the length direction 70 of the battery pack or separately provided at the top end of the battery pack receiving space 322 in the height direction 74 of the battery pack.

Specifically, the battery pack snap restraint 320 extends in the length direction 70 of the battery pack and the height direction 74 of the battery pack. The area of the part of the battery pack buckle limiting part 320 clamped with the battery fixing seat 5 can be increased, so that the limiting degree of the relative movement between the battery pack 30 and the battery fixing seat 5 in the width direction 72 of the battery pack is further improved. In the present embodiment, the battery pack engagement stopper 320 has a plate-like structure.

Further, the battery pack retaining portion 320 has a battery pack front end 321. The front face 321 of the battery pack has a battery pack guide surface. The battery pack guide surface is an inclined plane. When the battery pack assembly 3 is mounted on the battery holder 5, the battery pack buckle limiting part 320 can better play a role in guiding the battery pack guide surface in the process of moving relative to the battery holder 5 along the length direction 70 of the battery pack so as to ensure the mounting reliability and precision of the battery pack and the battery pack.

Additionally, the battery pack snap stop assembly 32 also includes a battery pack extension 324. The battery pack extension 324 is fixed to and protrudes from the outer wall surface of the sidewall of the battery pack 30. The battery pack snap stop 320 is adjacent to the battery pack extension 324. In this embodiment, the battery pack extension 324 is integrally formed with the battery pack snap fit retainer 320.

Further, the battery pack protruding portion 324 and the battery pack buckle limiting portion 320 both adopt a plate-shaped structure. The battery pack extension 324 and the battery pack snap limit 320 are made of steel. Of course, in other alternative embodiments, the battery pack protruding portion 324 and the battery pack fastening limiting portion 320 may be made of other materials according to actual requirements.

Further, the battery pack protruding portion 324 is vertically disposed between the battery pack fastening limiting portion 320 and the sidewall of the battery pack 30. The battery pack extension 324 extends in the width direction 72 of the battery pack toward the battery holder 5 and in the height direction 74 or the length direction of the battery pack.

In addition, the battery pack snap stop assembly 32 further includes a battery pack mounting portion 325. The battery pack mounting portion 325 is fixed to an outer wall surface of a side wall of the battery pack 30. The battery pack extension portion 324 is fixed to the battery pack mounting portion 325, and extends toward the battery holder 5 from a surface of the battery pack mounting portion 325 facing the battery holder 5. And a battery pack accommodating space 322 is formed around the battery pack retaining portion 320, the battery pack extending portion 324 and the battery pack mounting portion 325. In the present embodiment, the battery pack mounting portion 325 has a plate-like structure. The battery pack mounting portion 325 is detachably coupled to a sidewall of the battery pack in the length direction 70 of the battery pack by a fastener. Of course, in other alternative embodiments, the battery pack mounting portion 325 may be fixed to the side wall of the battery pack 30 in the longitudinal direction 70 of the battery pack by rivets.

As shown in fig. 2-3, the battery pack assembly 3 further includes a plurality of support and retention assemblies 33. The supporting and limiting components 33 are fixedly arranged on two side walls of the battery pack 30 in the length direction 70 of the battery pack. The support limiting component 33 is disposed to abut against an inner wall surface of the side wall of the battery holder 5 in the length direction of the battery holder 5, so as to limit the relative displacement of the battery pack 30 and the battery holder 5 in the width direction 72 of the battery pack. In this embodiment, the supporting and limiting members 33 respectively located at the two side walls are symmetrically disposed.

The supporting and limiting components 33 are fixedly arranged on two side walls of the battery pack 30 in the length direction 70 of the battery pack and abut against the battery fixing seat 5, in the process of installing the battery pack assembly 3 on the battery fixing seat 5, the battery fixing seat 5 does not interfere with the supporting and limiting component 33, after the battery pack assembly 3 is installed in place, the supporting and limiting component 33 can support and limit, so that the relative movement of the whole battery pack 30 and the whole battery fixing seat 5 in the width direction of the electric vehicle can be limited, so that the relative movement between the battery pack and the battery holder 5 in the width direction of the electric vehicle can be further restricted, so that the collision between the battery pack 30 and the battery holder 5 can be avoided under the condition that the turning angle of the electric vehicle is too large or frequent, thereby reducing the abrasion between the battery pack 30 and the battery holder 5 and prolonging the service life of the battery pack 30 and the battery holder 5.

Further, in the supporting and limiting assembly 33 and the battery pack retaining and limiting assembly 32 which are located on the same side wall of the battery pack 30, the supporting and limiting assembly 33 and the battery pack retaining and limiting assembly 32 are arranged at intervals in the length direction 70 of the battery pack.

The supporting and limiting component 33 is fixedly arranged at the end part of the side wall of the battery pack 30 in the length direction 70, so as to limit the relative displacement between the end parts of the battery pack 30 and the battery fixing seat 5 which are adjacently arranged in the width direction 72 of the battery pack, so as to directly limit the relative movement between the end parts of the battery pack 30 and the battery fixing seat 5 which are adjacently arranged in the width direction of the electric vehicle, so that the collision between the end parts of the battery pack 30 and the battery fixing seat 5 which are oppositely arranged can be avoided under the condition that the turning angle of the electric vehicle is too large or frequent, so as to reduce the abrasion between the battery pack 30 and the battery fixing seat 5, and prolong the service lives of the battery pack 30 and the battery fixing seat 5.

The two end parts of the side wall of the battery pack 30 in the length direction 70 of the battery pack are respectively provided with the supporting and limiting assemblies 33, so that the relative movement between the two end parts of the battery pack 30 adjacent to the battery fixing seat 5 in the width direction of the electric vehicle can be more reliably limited.

In the present embodiment, there are 1 support/stopper assembly 33 located at the front end of the battery pack 30 and 2 support/stopper devices located at the rear end of the battery pack 30. In other alternative embodiments, the number of the supporting and limiting assemblies 33 at the front end of the battery pack 30 may be 2 or more than 2, and the number of the supporting and limiting devices at the rear end of the battery pack 30 may be 1, 3 or more than 3, which do not limit the scope of the present invention.

Specifically, the supporting and limiting assembly 33 includes a convex hull protruding from the outer wall surface of the sidewall of the battery pack 30. It is possible to provide a hard support to the battery pack 30 to more reliably restrict the relative movement between the battery pack 30 and the end portion of the battery holder 5 disposed adjacent to the battery holder in the width direction of the electric vehicle. The convex hull has a convex surface for abutting against the inner wall surface of the side wall of the battery holder 5.

In addition, the battery pack assembly 3 further includes a plurality of battery replacement guiding and limiting assemblies 34, and the plurality of battery replacement guiding and limiting assemblies 34 are fixedly disposed on two side walls of the battery pack 30 in the length direction 70 of the battery pack. The battery replacement guiding and limiting assembly 34 is disposed to abut against an inner wall surface of a side wall of the battery holder 5 in the length direction of the battery holder 5, so as to clamp the battery pack 30 in the battery holder 5.

In the battery pack buckle limiting assembly 32 and the battery replacement guide limiting assembly 34 which are positioned on the same side wall of the battery pack 30, the battery replacement guide limiting assembly 34 and the battery pack buckle limiting assembly 32 are arranged at intervals in the length direction 70 of the battery pack;

the battery replacement guiding and limiting component 34 plays a guiding role in the installation process of the battery pack assembly 3, and plays a role in limiting, clamping and supporting the battery fixing seat 5 in the width direction of the electric vehicle after the installation of the battery pack assembly 3 is completed, so that the battery pack assembly 3 can be very reliably installed on the battery fixing seat 5 under the condition of normal running of the electric vehicle.

Specifically, the battery replacement guide limiting assembly 34 includes a guide mounting shell 340, a guide limiting portion 341, and an elastic member (not shown in the figure). The guide mounting case 340 is fixedly installed at the side wall of the battery pack 30. The guide mounting shell 340 has an accommodating cavity (not shown), and the outer side surface of the guide mounting shell 340 is provided with a mounting opening (not shown) communicated with the accommodating cavity. The top of the outer side surface of the guide mounting case 340 has an inclined surface, and the inclined surface extends obliquely inward to the upper end surface of the guide mounting case 340 along the width direction 72 of the battery pack. The top of the lateral surface of the guide installation shell 340 is provided with an inclined plane, when the battery pack assembly 3 is installed on the battery fixing seat 5, the battery pack assembly 3 moves upwards relative to the battery fixing seat 5 along the height direction of the electric vehicle, and the top of the lateral surface of the guide installation shell 340 can better play a role in guiding so as to ensure the installation reliability of the battery pack assembly and the battery fixing seat.

In addition, the guide stopper 341 is inserted into the mounting hole. And the outer side surface of the guide limiting portion 341 extends outward from the mounting opening along the width direction 72 of the battery pack, and is used for abutting against the inner wall surface of the side wall of the battery holder 5. The top of the region of the guide position-limiting portion 341 extending out of the mounting opening has an inclined surface, and the inclined surface of the guide position-limiting portion 341 extends obliquely inward in the width direction 72 of the battery pack. The top of the region extending out of the mounting opening in the guide limiting portion 341 is provided with an inclined plane, when the battery pack assembly 3 is mounted on the battery fixing seat 5, the top of the guide limiting portion 341 can better play a guiding role in the process that the battery pack assembly 3 moves upwards relative to the battery fixing seat 5 along the height direction of the electric vehicle, so as to ensure the mounting reliability of the battery pack assembly and the battery fixing seat.

In addition, the elastic member acts on the inner side surface of the guide stopper portion 341 and transmits a varying force between the guide stopper portion 341 and the guide mounting case 340 for providing a clamping force outward in the width direction 72 of the battery pack to the battery holder 5. The elastic component can provide a variable pre-tightening force for the battery fixing seat 5, so that the battery pack assembly 3 can be clamped in the battery fixing seat 5 very reliably.

Fig. 5-6 show a schematic structure of a battery holder 5 according to an embodiment of the present invention. The battery fixing seat 5 is used for being installed on the body of the electric vehicle to fix the battery pack assembly 3. The quick-change battery pack 30 or the rechargeable battery pack can be installed. As shown in fig. 5-6, the battery holder 5 includes a fixing bracket 50, a locking mechanism 51, and a plurality of holder snap-in position-limiting assemblies 52. The locking mechanism 51 is fixedly arranged on the fixed bracket 50. In the present embodiment, the locking mechanism 51 is located at the middle of the fixing bracket 50.

The plurality of fixing seat buckle limiting assemblies 52 are fixedly arranged on the fixing support 50. The plurality of holder snap limiting assemblies 52 are disposed in one-to-one correspondence with the plurality of battery pack snap limiting assemblies 32. The fixing seat buckle limiting component 52 is arranged to be clamped with the corresponding battery pack buckle limiting component 32 so as to limit the relative displacement of the battery pack 30 and the fixing bracket 50 in the third direction. Namely, a structure of a left-right dead limit (i.e., a hard limit or a fixed limit) in the third direction is adopted between the battery pack 30 and the battery holder 5, so that the relative movement between the battery pack 30 and the battery holder 5 in the third direction can be limited to a great extent. That is to say, for prior art, the degree of difficulty that battery package 30 rocked can be great, and the displacement of battery package 30 can be avoided or at least weakened when the electric motor car is not even running (for example electric motor car turn angle is too big or frequent) to can avoid or at least reduce the abnormal sound or the wearing and tearing that produce the collision and cause because of battery package 30 and fixed bolster 50, and then improved the security performance and the life of battery package assembly 3 and battery fixing base 5.

In the present embodiment, the fixing bracket 50 has a frame structure. The locking mechanism 51 is fixed within the frame of the frame structure. Of course, in other embodiments, the fixing bracket 50 may also be a disk-shaped structure with a circular side wall, a rectangular parallelepiped structure with an opening on the bottom surface, or a plate-shaped structure, which does not limit the scope of the present invention.

The locking mechanisms 51 are provided on both sides of the fixing bracket 50 in the longitudinal direction 90 of the fixing bracket. The fixing seat buckle limiting component 52 and the locking mechanism 51 which are positioned on the same side are arranged at intervals. Wherein, the length direction 90 of the fixed bracket is approximately the same as the length direction of the electric vehicle.

In addition, the locking mechanism 51 generally includes a lock base 510, and the lock base 510 has an opening and a cavity extending from the opening, wherein the opening is used for the locking portion 31 mounted on the battery pack 30 to enter the cavity.

In addition, the plurality of holder snap retention assemblies 52 are secured to the side walls of the fixed bracket 50 in the length direction 90 of the fixed bracket. Further preferably, the plurality of fixing seat buckle limiting components 52 are distributed on two side walls of the fixing bracket 50 in the length direction 90 of the fixing bracket.

As shown in fig. 6-7, the holder snap stop assembly 52 includes a holder snap stop 520. The fixing seat buckle limiting part 520 is fixed on the inner wall surface of the side wall of the fixing bracket 50 and is arranged to be clamped on the battery pack buckle limiting component 32. A holder accommodating space 522 is provided between the holder engagement limiting portion 520 and an inner wall surface of the sidewall of the fixing bracket 50. In this embodiment, the holder engaging portion 520 is disposed to engage with the battery pack receiving space 322, and the holder receiving space 522 is disposed to engage with the battery pack engaging portion 320. Of course, in other alternative embodiments, the holder buckle limiting part 520 may be separately configured to be clamped in the battery pack accommodating space 322, or the holder accommodating space 522 may be separately configured to be clamped in the battery pack buckle limiting part 320.

The holder receiving space 522 has a holder receiving opening 523. The holder receiving opening 523 is located at a rear end of the holder receiving space 522 in the length direction 90 of the fixing bracket and at a bottom end of the holder receiving space 522 in the height direction 94 of the fixing bracket. The holder receiving opening 523 allows at least a portion of the battery pack engaging and limiting assembly 32 to enter and exit the holder receiving space 522, so that the battery pack engaging and limiting portion 320 and the battery holder 5 can be engaged with each other, and the battery pack engaging and limiting portion 320 does not interfere with the battery holder 5 before being installed in place. In other alternative embodiments, the holder receiving opening 523 may be separately disposed at the rear end of the holder receiving space 522 along the length direction 90 of the fixing bracket and at the bottom end of the holder receiving space 522 along the height direction 94 of the fixing bracket.

Specifically, the retainer snap stop 520 extends in the length direction 90 of the retainer bracket and in the height direction 94 of the retainer bracket. Thus, the area of the part where the battery pack buckling limiting part 320 and the fixing seat buckling limiting part 520 are clamped mutually can be increased, and the limiting degree of the relative movement between the battery pack 30 and the fixing bracket in the width direction 72 of the battery pack is further improved. In this embodiment, the fixing seat catch limiting part 520 has a plate-like structure.

Further, the fixing seat buckling limiting part 520 is provided with a fixing seat rear end surface 521, the fixing seat rear end surface 521 is provided with a fixing seat guide surface, and the fixing seat guide surface is an inclined plane. When installing battery package assembly 3 in battery fixing base 5, the spacing portion 320 of battery package buckle is along the length direction 70 of battery package for the in-process of battery fixing base 5 removal, and fixing base spigot surface and the cooperation of battery package spigot surface can play the guide effect better to ensure the installation reliability and the precision of both.

In addition, the holder snap limiting assembly 52 further comprises a holder extension 524. The fixing base protrusion 524 is fixed to an inner wall surface of the sidewall of the fixing bracket and protrudes therefrom, and the fixing base buckle limiting portion 520 is adjacent to the fixing base protrusion 524.

Further, the fixing base protrusion 524 and the fixing base buckle limiting portion 520 are integrally formed. The holder protrusion 524 and the holder engaging portion 520 are both plate-shaped. The fixing seat extension 524 and the fixing seat buckle limiting part 520 are made of steel. Of course, in other alternative embodiments, the fixing seat protruding portion 524 and the fixing seat buckle limiting portion 520 may be made of other materials according to actual needs.

Further, the fixing base protrusion 524 is vertically disposed between the fixing base buckling limiting portion 520 and the sidewall of the fixing bracket 50. The holder extension 524 extends in the width direction 92 of the holder toward the battery pack 30 and in the height direction 94 or length direction of the holder.

In addition, the holder snap stop assembly 52 further includes a holder mounting portion 525. The holder mounting portion 525 is fixed to an inner wall surface of the side wall of the fixed bracket 50. The holder extension 524 is fixed to the holder mounting part 525 and extends toward the battery pack 30 from a surface of the holder mounting part 525 facing the battery pack 30. And a holder accommodating space 522 is formed around the holder engaging portion 520, the holder extending portion 524, and the holder mounting portion 525.

As shown in fig. 6, the fixing bracket 50 has a protruding portion 53 on an inner wall surface of a side wall in the longitudinal direction 90 of the fixing bracket, and the protruding portion 53 is protruded on the inner wall surface of the fixing bracket 50. The projection 53 is fixed in the frame of the frame structure of the fixing bracket 50.

Fig. 8-9 show a schematic construction of a quick-change holder assembly 1 according to an embodiment of the invention. As shown in fig. 8-9, the quick-change holder assembly 1 includes the battery pack assembly 3 and the battery holder 5. The battery pack assembly 3 is mounted on the battery holder 5.

As will be understood from fig. 10, the battery pack engaging position-limiting portion 320 is engaged with the holder receiving space 522. Moreover, the fixing seat buckle limiting part 520 is clamped in the battery pack accommodating space 322. This makes it possible to more reliably restrict the relative displacement of the battery pack 30 and the fixing bracket 50 in the width direction 72 of the battery pack. In other alternative embodiments, the battery pack fastening limiting portion 320 may also be separately fastened to the holder accommodating space 522, or the holder fastening limiting portion 520 may be separately fastened to the battery pack accommodating space 322.

In addition, the battery pack buckle limiting part 320 is in clearance fit with the fixing seat accommodating space 522. The fixing seat buckle limiting part 520 is in clearance fit with the battery accommodating space 322. Specifically, the maximum clearance of the clearance fit is less than or equal to 0.5 mm. In other alternative embodiments, the battery pack snap-fit limiting portion 320 and the holder receiving space 522 may be separately provided as a clearance fit, or the holder snap-fit limiting portion 520 and the battery pack receiving space 322 may be separately provided as a clearance fit.

In addition, the battery accommodating opening 323 is used for the fixing seat buckle limiting part 520 to enter and exit the battery accommodating space 322. The holder receiving opening 523 allows the battery pack engaging portion 320 to enter and exit the holder receiving space 522.

As shown in fig. 9, the support and position limiting member 33 abuts against a surface of the projection 53 facing away from the inner wall surface of the fixing bracket 50. In the present embodiment, the convex surface of the convex hull of the support and stop assembly 33 abuts against a surface of the convex portion 53 that faces away from the inner wall surface of the fixed bracket 50. Specifically, the outer side surface of the convex surface abuts against a surface of the inner wall surface of the protruding portion 53 that faces away from the fixed bracket 50. As shown in fig. 9, a surface of the projecting portion 53 facing away from the inner wall surface of the fixed bracket 50 is a flat surface.

As shown in fig. 8-10, in the process of installing the battery pack assembly 3 in the battery holder 5, the battery pack assembly 3 moves upward along the height direction of the battery holder 5 under the action of external force, the battery pack buckle limiting component 32 and the support limiting component 33 move upward in a linked manner, the battery pack buckle limiting component 32 and the convex hull of the support limiting component 33 are located in a space formed by the side wall of the battery pack and the side wall of the fixing bracket 50, the convex hull of the support limiting component 33 does not contact the fixing bracket 50 and the convex part 53, the battery pack buckle limiting component 32 does not contact the fixing bracket 50, that is, the battery holder 5 does not interfere with the convex hull and the battery pack buckle limiting component 32, and the locking part 31 passes through the opening of the locking mechanism 51 and enters the cavity; battery package assembly 3 moves along battery holder 5's length direction under the exogenic action to the back of targetting in place is installed, and battery package buckle spacing subassembly 32 is blocked mutually with fixing base buckle spacing subassembly 52 and is established, and the convex surface of convex closure supports the one side of deviating from the internal face of fixed bolster 50 in the support base in bulge 53, in locking portion 31 locking and the locking mechanism.

The invention also provides an electric vehicle which comprises the quick-change bracket assembly 1.

To sum up, the battery pack assembly 3, the battery holder 5, the quick-change bracket assembly 1 and the electric vehicle of the present invention have the plurality of battery pack buckle limiting components 32 fixedly disposed on two side walls of the battery pack 30 in the length direction 70 of the battery pack, the plurality of holder buckle limiting components 52 fixedly disposed on two side walls of the fixing bracket 50 in the length direction 90 of the fixing bracket, the holder buckle limiting components 52 are engaged with the corresponding battery pack buckle limiting components 32, that is, a structure of a left-right dead limit (i.e., a hard limit or a fixed limit) in the width direction 72 of the battery pack is adopted between the battery pack 30 and the fixing bracket 50, so that when the battery pack 30 is shaken left and right during non-steady operation of the electric vehicle, the battery pack buckle limiting component 32 disposed on one side wall is pressed by the engaged holder buckle limiting component 52, and the battery pack buckle limiting component 32 disposed on the other side wall is pressed by the engaged holder buckle limiting component 52 The added pulling force, i.e. the battery pack buckle limiting assemblies 32 on the two side walls are simultaneously stressed, can greatly reduce or almost avoid the relative displacement between the battery pack 30 and the fixing bracket 50 in the width direction 72 of the battery pack. Compared with the prior art, the battery pack shaking difficulty is high, and the displacement of the battery pack 30 can be avoided or at least weakened when the electric vehicle runs non-stably (such as the electric vehicle runs at an excessively large or frequent turning angle), so that abnormal sound or abrasion caused by collision between the battery pack 30 and the fixed support 50 can be avoided or at least reduced, and the safety performance and the service life of the battery pack assembly 3 and the battery fixing seat 5 are further improved.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

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

Claims

1. A battery pack assembly comprising a battery pack and a locking portion for locking the battery pack in a locking mechanism of a battery holder to limit relative displacement of the battery pack and the battery holder in a first direction and a second direction, the first direction being perpendicular to the second direction, the battery pack assembly further comprising:

2. The battery pack assembly of claim 1, wherein the battery pack snap stop assembly comprises:

3. The battery pack assembly according to claim 2, wherein the battery pack accommodating space has a battery pack accommodating opening at a front end of the battery pack accommodating space in a length direction of the battery pack and/or at a top end of the battery pack accommodating space in a height direction of the battery pack;

and/or the battery pack buckle limiting part adopts a plate-shaped structure.

4. The battery pack assembly of claim 2, wherein the battery pack snap stop assembly further comprises:

5. The battery pack assembly of claim 4, wherein the battery pack extension is integrally formed with the battery pack snap retention;

6. The battery pack assembly of claim 4, wherein the battery pack snap stop assembly further comprises:

7. The battery pack assembly of claim 1, wherein the battery pack snap-fit limiting assemblies on the same side wall are at least two, and the battery pack snap-fit limiting assemblies are disposed on both end portions of the side wall of the battery pack in the length direction of the battery pack.

8. The battery pack assembly of claim 7, wherein the battery pack snap-fit limiting members on the same side wall are at least three, and the battery pack snap-fit limiting members are also provided in the middle of the side wall of the battery pack in the length direction of the battery pack.

9. The battery pack assembly of claim 1, wherein the battery pack snap stop assemblies on the two side walls, respectively, are symmetrically disposed;

10. The battery pack assembly of claim 1, further comprising:

11. The battery pack assembly of claim 10, wherein the support and position limiting member is fixedly disposed at an end of the side wall of the battery pack in a length direction of the battery pack to limit relative displacement between the end of the battery pack disposed adjacent to the battery holder in a width direction of the battery pack;

12. The battery pack assembly of any one of claims 1-11, further comprising:

13. A battery holder, the battery holder comprising a fixing bracket and a locking mechanism, the locking mechanism being fixedly arranged on the fixing bracket, wherein the battery holder is adapted to be mounted on a body of an electric vehicle to fix a battery pack assembly as claimed in any one of claims 1 to 12;

the battery holder further includes:

14. The battery holder of claim 13, wherein the holder snap retention assembly comprises:

15. The battery holder of claim 14, wherein the holder receiving space has a holder receiving opening, the holder receiving opening is located at a rear end of the holder receiving space along a length direction of the fixing bracket and/or at a bottom end of the holder receiving space along a height direction of the fixing bracket, and the holder receiving opening allows at least a portion of the battery pack retaining assembly to enter and exit the holder receiving space;

and/or the fixing seat buckle limiting part adopts a plate-shaped structure.

16. The battery holder of claim 14, wherein the holder snap retention assembly further comprises:

17. The battery holder of claim 16, wherein the holder protrusion is integrally formed with the holder snap-fit retainer;

18. The battery holder of claim 16, wherein the holder snap-fit limiting assembly further comprises a holder mounting portion fixed to an inner wall surface of the side wall of the fixing bracket, the holder extension is fixed to the holder mounting portion and extends from the holder mounting portion toward one surface of the battery pack toward the battery pack, and the holder snap-fit limiting portion, the holder extension, and the holder mounting portion surround and form the holder accommodating space therebetween.

19. The battery holder according to claim 13, wherein a plurality of the holder snap-fit limiting members are fixed on the side wall of the fixing bracket located in the length direction of the fixing bracket, and preferably, a plurality of the holder snap-fit limiting members are distributed on the two side walls of the fixing bracket located in the length direction of the fixing bracket.

20. A quick-change holder assembly comprising a battery pack assembly according to any one of claims 1 to 12 and a battery holder according to any one of claims 13 to 19.

21. A quick-change holder assembly comprising the battery pack assembly of claim 2 and the battery holder of claim 14;

22. The quick-change bracket assembly according to claim 21, wherein the battery pack engagement limiting portion is in clearance fit with the holder receiving space, and/or the holder engagement limiting portion is in clearance fit with the battery pack receiving space.

23. The quick-change holder assembly according to claim 22, wherein the maximum clearance of the clearance fit is less than or equal to 0.5 mm.

24. The quick-change bracket assembly according to any one of claims 21-23, wherein the battery pack receiving space has a battery pack receiving opening for the fixing seat catch limiting portion to enter and exit the battery pack receiving space;

25. An electric vehicle comprising a quick-change holder assembly according to any one of claims 20 to 24.