CN215883382U

CN215883382U - Quick-change locking mechanism assembly for battery replacement and electric automobile

Info

Publication number: CN215883382U
Application number: CN202122089024.7U
Authority: CN
Inventors: 侯艳丽; 李玉军; 高敏; 胡万泉; 石岩石; 李飞; 李鸿键; 常林
Original assignee: Beijing Shengneng Energy Technology Co Ltd
Current assignee: Beijing Shengneng Energy Technology Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-02-22
Anticipated expiration: 2031-08-31

Abstract

The invention relates to a quick-change locking mechanism assembly for battery replacement and an electric automobile, comprising a lock pin end fixedly connected with an automobile body and a battery end fixedly connected with the battery, wherein the lock pin end comprises an automobile body lock pin, the battery end comprises a lock body, an elastic part and a magnetic locking part capable of being driven by an external magnetic field, the lock body is provided with a lock body cavity, the lock body is provided with an insertion hole, the automobile body lock pin can axially extend into the lock body cavity through the insertion hole, the magnetic locking part is used for locking one end of the automobile body lock pin inserted into the lock body in an unlocking manner, the elastic part is positioned between the magnetic locking part and the lock body, and the quick-change locking mechanism assembly for battery replacement is constructed in a way that when the external magnetic field is absent, the elastic part supports the magnetic locking part to enter a locking position for locking the automobile body lock pin, when an external magnetic field is applied, the magnetically locking member can move against the elastic member to enter an unlocking position for releasing the vehicle body-locking pin. The quick change locking mechanism assembly for battery replacement provided by the disclosure can solve the problem that a battery pack is inconvenient to disassemble.

Description

Quick-change locking mechanism assembly for battery replacement and electric automobile

Technical Field

The utility model relates to an electric automobile's battery replacement field, specifically relates to a trade quick change locking mechanism assembly and electric automobile for electricity.

Background

The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by using a motor, and meets various requirements of road traffic and safety regulations. Because the influence on the environment is smaller than that of the traditional automobile, the prospect is widely seen.

For improving the endurance capacity of the electric automobile, the battery pack of the electric automobile is replaced by arranging the battery replacement station at present, so that the endurance capacity of the electric automobile is improved.

The replacement method of the mainstream battery pack in the market is to disassemble and assemble in a bolt connection mode, and has the defect that about 10 bolts are required to be disassembled for each replacement, so that the time is long; and one trades power station for satisfying the demand that multiple vehicle traded the electricity, need increase corresponding quantity and add the installation and the dismantlement that the unblock instrument rifle suited different motorcycle type battery package, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a trade quick change locking mechanism assembly for electricity, this trade quick change locking mechanism assembly for electricity can solve the inconvenient problem of battery package dismantlement.

In order to achieve the above object, the present disclosure provides a quick-change locking mechanism assembly for battery replacement, including a locking pin end for fixed connection with a vehicle body, and a battery end for fixed connection with a battery, where the locking pin end includes a vehicle body locking pin, the battery end includes a lock body and a magnetic locking member that an elastic member can be driven by an external magnetic field, the lock body is provided with a lock body cavity, the magnetic locking member and the elastic member are both located in the lock body cavity, the lock body is provided with an insertion hole, the vehicle body locking pin can axially extend into the lock body cavity through the insertion hole, the magnetic locking member is used for locking one end of the vehicle body locking pin inserted into the lock body in an unlocking manner, the elastic member is located between the magnetic locking member and the lock body, and the quick-change locking mechanism assembly for battery replacement is configured such that when there is no external magnetic field, the elastic member supports the magnetic locking member to enter a locking position for locking the vehicle body locking pin, when an external magnetic field is applied, the magnetic locking piece can overcome the elastic piece to move into an unlocking position for releasing the vehicle body locking pin.

Optionally, retaining member is inhaled to magnetism includes locking pearl and locking pearl retainer, the confession has been seted up to locking pearl retainer the centre bore that the automobile body lockpin passed, it is a plurality of locking pearl is in along circumference setting and can radially move in the locking pearl retainer, lock body chamber sets up to the toper chamber, the structure in lock body chamber is for following the axial towards the automobile body convergent, the elastic component sets up locking pearl retainer keep away from the automobile body one end with between the lock body, when being attracted by external magnetic field, locking pearl retainer is in can overcome under the actuation in magnetic field the elasticity of elastic component carries out axial motion, locking pearl can be in the broad position in toper chamber and along radial movement in order to get into unlock position.

Optionally, the elastic member is provided as a compression spring, the locking ball retainer is formed in a T-shaped structure including a guide section and a retaining section that are fixed in the axial direction, the retaining section is disposed close to the vehicle body and is used for accommodating the locking ball, the guide section extends in the axial direction, and the compression spring is sleeved on the guide section and is located between the retaining section and a portion of the lock body away from the vehicle body.

Optionally, the guide section is formed as a guide post extending in the axial direction, the holding section is formed as an accommodating disc coaxial with the guide post, the guide post is formed with a guide cavity, a holding cavity with the central hole is formed in the accommodating disc, a through hole for allowing the locking bead to leak outwards in the radial direction is formed in the circumferential side wall of the holding cavity, the guide cavity is coaxial with and communicated with the central hole for the vehicle body lock pin to penetrate, and the guide post is fixedly connected with one surface of the accommodating disc far away from the vehicle body.

Optionally, the lock body is kept away from the one side of automobile body is seted up and is used for the installation the mounting hole of retaining member is inhaled to magnetism, the lock body still includes the shutoff lid, and this shutoff lid week side is provided with the external screw thread, the mounting hole inner wall be provided with be used for with external screw thread fit's internal thread, the exhaust hole has been seted up to the shutoff lid, the shutoff is covered and is seted up and be used for the rotation the handle hole of shutoff lid.

Optionally, the lock pin end further includes a lock pin box for being fixedly connected to the vehicle body, an extending hole is formed in the lock pin box, the vehicle body lock pin includes a fixing block and a lock pin main body, the fixing block is located inside the lock pin box, one end of the lock pin main body is fixedly connected to the fixing block, the other end of the lock pin main body extends through the extending hole, and the length of the lock pin main body is far greater than the axial height of the lock pin box.

Optionally, the periphery wall on the lockpin main part is seted up along circumference and is used for with retaining member complex ring channel is inhaled to magnetism.

Optionally, the locking pin main body is a cylinder, the extending hole is a circular hole, the fixing block is a cylinder, the radius length of the locking pin main body is smaller than the length radius of the extending hole, and the radius length of the fixing block is larger than the radius length of the extending hole.

Optionally, one end of the lock pin main body, which is far away from the fixing block, is provided with a tip.

According to a second aspect of the disclosure, an electric vehicle is provided, where the electric vehicle includes a vehicle body and a battery pack, and the quick-change locking mechanism assembly for changing battery provided by the disclosure is provided, where the vehicle body is fixedly connected with a lock pin end, and the battery pack is fixedly connected with a battery end.

According to the technical scheme, the lock pin end is fixedly connected with the vehicle body, the battery end is fixedly connected with the battery, the battery pack is mounted and dismounted after the lock pin end and the battery end are locked or unlocked, when the battery pack is required to be dismounted from the vehicle body, only an external magnetic field needs to be set, the magnetic suction locking piece is driven by the external magnetic field to overcome the elastic movement of the elastic piece to reach the unlocking position, the magnetic suction locking piece releases the vehicle body lock pin, the lock pin end is separated from the battery end, and the battery pack is unlocked; when needing to install the battery package on the automobile body, cancel plus magnetic field, aim at the patchhole with the automobile body lockpin this moment, move the battery package towards the automobile body, external force makes the elastic component shrink, make the magnetic locking piece leave the locking position temporarily, insert the automobile body lockpin, get rid of external force, under the effect of elastic component, the magnetic locking piece resumes to the locking position, the magnetic locking piece locks the automobile body lockpin, the completion adds the lock, convenient completion is changed the battery package under the condition that does not need manual use assorted instrument.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a quick-change locking mechanism assembly for battery replacement according to an embodiment of the present disclosure.

Fig. 2 is an exploded view of a quick-change locking mechanism assembly for replacing a battery according to an embodiment of the present disclosure.

Fig. 3 is a cross-sectional view of a quick-change locking mechanism assembly for battery replacement in a locking position according to an embodiment of the disclosure.

Fig. 4 is a cross-sectional view of an unlocking position of a quick-change locking mechanism assembly for battery replacement according to an embodiment of the disclosure.

Description of the reference numerals

1. A latch end; 101. a body latch; 1011. a fixed block; 1012. a lock pin body; 102. a latch box; 2. a battery terminal; 201. a lock body; 202. an elastic member; 203. magnetically attracting the locking member; 2031. a locking bead; 2032. a locking bead retainer; 3. locking the body cavity; 4. an insertion hole; 5. a central bore; 6. a guide post; 7. mounting holes; 8. a blocking cover; 9. an outlet hole; 10. an annular groove; 11. a guide cavity.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner wall, outer wall" refers to a wall surface facing toward or away from the vehicle body lock pin, unless otherwise specified; the "axial direction" refers to a direction along the length of the vehicle body lock pin, and the "circumferential direction" refers to a direction of circular motion with the "radial direction" as a center point.

In order to achieve the above object, the present disclosure provides a quick-change locking mechanism assembly for battery replacement, including a lock pin end 1 for fixedly connecting with a vehicle body, and a battery end 2 for fixedly connecting with a battery, where the lock pin end 1 includes a vehicle body lock pin 101, the battery end 2 includes a lock body 201, and a magnetic locking member 203 having an elastic member 202 capable of being driven by an external magnetic field, the lock body 201 has a lock body cavity 3, the magnetic locking member 203 and the elastic member 202 are both located in the lock body cavity 3, the lock body 201 has an insertion hole 4, the vehicle body lock pin 101 can axially extend into the lock body cavity 3 through the insertion hole 4, the magnetic locking member 203 is used for releasably locking one end of the vehicle body lock pin 101 inserted into the lock body 201, the elastic member 202 is located between the magnetic locking member 203 and the lock body 201, and the quick-change locking mechanism assembly for battery replacement is configured such that, in the absence of the external magnetic field, the elastic member 202 supports the magnetic locking member 203 to enter a locking position for locking the vehicle body lock pin 101, the magnetically attractive locking member 203 is capable of moving against the resilient member 202 into an unlocked position releasing the vehicle body-locking pin 101 when an applied magnetic field is applied.

According to the technical scheme, the lock pin end 1 is fixedly connected with the vehicle body, the battery end 2 is fixedly connected with the battery, the battery pack is mounted and dismounted after the lock pin end 1 and the battery end 2 are locked or unlocked, when the battery pack needs to be dismounted from the vehicle body, an external magnetic field is applied outside the lock body 201, the external magnetic field drives the magnetic locking piece 203 to overcome the elastic movement of the elastic piece 202 and reach the unlocking position, at the moment, the magnetic locking piece 203 can release the vehicle body lock pin 101, the lock pin end 1 is separated from the battery end 2, and the battery pack is unlocked; when needing to install the battery package on the automobile body, cancel external magnetic field, aim at automobile body lockpin 101 patchhole 4, will move the battery package towards the automobile body, external force makes the shrink of elastic component 202, make the retaining member 203 of magnetism inhale leave the locking position temporarily, can insert automobile body lockpin 101 this moment, when getting rid of external force, under the effect of elastic component 202, the retaining member 203 of magnetism inhales resumes to the locking position, the retaining member 203 of magnetism inhales locks automobile body lockpin 101, accomplish and add the lock, convenient completion is changed the battery package under the condition that does not need manual use assorted instrument. In addition, the external magnetic field in the scheme can be a permanent magnet made of a permanent magnetic material, and can also be an electromagnetic device which generates a magnetic field after being electrified, and the disclosure is not limited.

As an alternative embodiment, the magnetic locking member 203 includes a locking bead 2031 and a locking bead holder 2032, the locking bead holder 2032 is provided with a central hole 5 for the vehicle body lock pin 101 to pass through, a plurality of locking beads 2031 are circumferentially disposed in the locking bead holder 2032 and can move along the radial direction, the lock cavity 3 is provided as a tapered cavity, the lock cavity 3 is configured to taper towards the vehicle body along the axial direction, that is, when the locking bead holder is located at different positions along the axial direction, the distance between the inner walls of the locking bead holder and the lock cavity changes, specifically, when in the unlocking position, the locking bead holder is located at a wider position of the lock cavity, that is, farther from the inner wall of the lock cavity, and at this time, the locking bead in the locking bead holder has a larger moving space along the radial direction, so that only the external force is applied to the vehicle body lock pin, that is able to push the locking bead locked on the vehicle body lock pin outward along the radial direction, so that the vehicle body lock pin cannot be pulled out or inserted. In the locked position, the locking ball retainer is located in a narrower lock body cavity so that the locking ball can be positioned on the vehicle body locking pin by squeezing the locking ball through the lock body cavity to maintain locking of the vehicle body locking pin. Further, an elastic member 202 is disposed between an end of the locking ball holder 2032 away from the vehicle body and the lock body 201, and the locking ball holder 2032 can move axially under actuation of the magnetic field by overcoming the elastic force of the elastic member 202 under actuation of the magnetic field.

In specific operation, when unlocking is required, an external magnetic field can be arranged at one end of the lock body 201 far away from the car body, the locking ball retainer 2032 is actuated by the external magnetic field to move axially far away from the car body, the locking ball retainer 2032 moves to a wider position of the lock body cavity 3, the range of the locking ball 2031 which can move in the radial direction is increased, the locking ball 2031 is in locking contact with the car body lock pin 101, the car body lock pin 101 can be drawn out, and unlocking is completed; when a new battery pack needs to be installed, the external magnetic field is removed, external force is applied to insert the vehicle body lock pin 101 into the central hole 5, in the inserting process, under the action of the external force, the locking bead retainer 2032 overcomes the elasticity of the elastic piece 202 to move downwards under the action of the external force, the movable range of the locking bead 2031 in the radial direction is increased, so that the vehicle body lock pin 101 can be inserted into the central hole 5, the external force for withdrawing the pin is inserted, under the action of the elastic piece 202, the locking bead retainer 2032 rises to the narrower part of the lock body cavity 3, the radial movable space of the locking bead 2031 is reduced, the locking bead 2031 locks the vehicle body lock pin 101 under the limitation of the inner wall of the lock body cavity 3, the locking end 1 and the battery end 2 are locked, and the battery pack is convenient to be fixed on a vehicle body.

As an alternative embodiment, the elastic element 202 is provided as a compression spring, the locking bead retainer 2032 is formed as a T-shaped structure comprising a guide section fixed in the axial direction and a retaining section arranged close to the car body and adapted to receive the locking bead 2031, the guide section extending in the axial direction, and the compression spring is sleeved on the guide section and is located between the retaining section and the part of the lock body 201 remote from the car body. The holding section is convenient for drive locking ball 2031 and reciprocates to make locking ball 2031 possess different radial spaces, realize locking and loosening automobile body lockpin 101, the holding section plays the guide effect to compression spring's deformation direction when compression spring compression and recovery, the compression spring of being convenient for radially moves.

As an alternative embodiment, the guiding section is formed as a guiding column 6 extending along the axial direction, the holding section is formed as a containing disc coaxial with the guiding column 6, the guiding column 6 is formed with a guiding cavity, a holding cavity with a central hole 5 is formed in the containing disc, a through hole for the locking ball 2031 to partially leak outwards along the radial direction is formed on the circumferential side wall of the holding cavity, the guiding cavity is coaxial with the central hole 5 and communicated for the vehicle body locking pin 101 to penetrate, and the guiding column 6 is fixedly connected with one surface of the containing disc far away from the vehicle body. When the vehicle-body lock pin 101 is inserted, the vehicle-body lock pin 101 is inserted into the guide cavity through the center hole 5, the space in which the locking bead 2031 can move in the radial direction changes with the change in the position of the accommodating disc in the radial direction, and when the space in which the locking bead 2031 can move in the radial direction is large, the locking bead 2031 can move freely in the holding cavity, and the locking bead 2031 releases the vehicle-body lock pin 101; when the locking bead 2031 is small in radial movable space, the locking bead 2031 extends out from the through hole toward one surface of the vehicle body lock pin 101 to lock the vehicle body lock pin 101, so that the magnetic locking member 203 locks and unlocks the vehicle body lock pin 101.

In other embodiments, one end of the guiding section is fixedly connected with the accommodating disc, the other end of the guiding section is fixedly connected with the surface, far away from the vehicle body, of the inner wall of the lock body cavity 3, and the guiding section is a hollow telescopic rod.

As an optional implementation manner, a mounting hole 7 for mounting the magnetic locking member 203 is provided on one side of the lock body 201 away from the vehicle body, the lock body 201 further includes a blocking cover 8, an external thread is provided on the peripheral side of the blocking cover 8, an internal thread for matching with the external thread is provided on the inner wall of the mounting hole 7, an exhaust hole is provided on the blocking cover 8, and an operation hole for rotating the blocking cover 8 is provided on the blocking cover 8. The compression spring is installed through the installation hole 7, the plugging cover 8 is rotated through the operation hole, the plugging cover 8 is in threaded connection with the inner wall of the installation hole 7, the plugging cover 8 is convenient to provide extrusion force for the compression spring, and the compression spring can keep a compression state. And the radial upward supporting force is provided for the magnetic locking piece 203, and in the process of inserting the vehicle body lock pin 101, air in the guide cavity is exhausted through the through hole and the exhaust hole formed in the bottom of the guide cavity, so that the vehicle body lock pin 101 can be conveniently inserted.

In other possible embodiments, because the driving is through an external magnetic field, no internal operation is needed, and after the installation is completed inside, the blocking cover 8 can be connected with the inner wall of the installation hole 7 through welding, so that the strength of the whole structure is ensured.

As an optional embodiment, the lock pin end 1 further includes a lock pin box 102 for being fixedly connected with a vehicle body, an extending hole 9 is formed in the lock pin box 102, the vehicle body lock pin 101 includes a fixing block 1011 and a lock pin body 1012, the fixing block 1011 is located inside the lock pin box 102, one end of the lock pin body 1012 is fixedly connected with the fixing block 1011, the other end of the lock pin body 1012 extends through the extending hole 9, and the length of the lock pin body 1012 is far greater than the height of the lock pin box 102 in the axial direction. When the vehicle body is installed, the lock pin box 102 is fixedly connected with the vehicle body through bolts, the fixing block 1011 is arranged inside the lock pin box 102, and the lock pin main body 1012 extends out, so that the lock pin end 1 is conveniently fixed on the vehicle body.

In other embodiments, the striker body 1012 may also be welded to the vehicle body or may be bolted to the vehicle body.

As an alternative embodiment, the peripheral wall of the locking pin main body 1012 is circumferentially provided with an annular groove 10 for cooperating with the magnetically attracting locking member 203. The annular groove is of a continuous structure, can be matched with the locking bead without limiting the circumferential direction of the vehicle body lock pin, and is convenient to operate. In addition, the annular groove 10 can cooperate with the locking bead 2031 to further enhance the locking of the locking bead 2031 to the locking pin body 1012.

In other embodiments, the latch body 1012 is thicker at the end toward the battery pack than at the end of the latch body 1012 away from the battery pack.

As an alternative embodiment, the locking pin main body 1012 is a cylinder, the protrusion hole 9 is a circular hole, the fixing block 1011 is a cylinder, the radius length of the locking pin main body 1012 is smaller than the length radius of the protrusion hole 9, and the radius length of the fixing block 1011 is larger than the radius length of the protrusion hole 9. The locking pin body 1012 has a displacement space in the radial direction, and when the locking pin body 1012 is inserted into the lock body 201, the locking pin body 1012 can be aligned with the insertion hole 4 by movement in the locking pin case 102, facilitating insertion of the locking pin body 1012 into the lock body 201.

As an alternative embodiment, the end of the locking pin body 1012 distal from the fixed block 1011 is provided as a pointed end. The pointed tip provides a guide for the insertion of the locking pin body 1012 into the lock body 201 to facilitate insertion of the locking pin body 1012 into the insertion aperture 4.

In other embodiments, the insertion hole 4 is chamfered on the circumferential side to avoid collision and to guide.

The utility model discloses a trade quick change locking mechanism assembly for electricity, at the in-process that uses, open shutoff lid 8 earlier, put compression spring into lock body chamber 3, threaded

connection shutoff lid

8 and 7 inner walls of mounting hole, the shutoff lid 8 provides compression spring holding power in compression spring, compression spring jack-up retaining member passes through bolt fixed connection with lockpin end 1 and automobile body, passes through bolt and battery package fixed connection with the lock body 201 of battery end 2. When an old battery pack needs to be disassembled, an external magnetic field is arranged on the surface, far away from a vehicle body, of the battery end 2, the external magnetic field attracts the containing disc to overcome the resistance of the compression spring to drive the locking ball 2031 to move downwards, the containing disc enters the wider area of the lock body cavity 3, the space of the locking ball 2031 moving in the radial direction is increased, the binding force of the locking ball 2031 on the locking pin main body 1012 is weakened, the locking pin main body 1012 is pulled out, and the old battery pack is unlocked; when installing new battery package, cancel external magnetic field, aim at lockpin main part 1012 at patchhole 4, use external force to promote the battery package, insert lockpin main part 1012 in patchhole 4, the retaining member overcomes compression spring's elasticity downwards under the effect of external force, locking pearl 2031 is at the radial displacement, the reasoning of external force to the retaining member weakens after lockpin main part 1012 inserts centre bore 5, the retaining member resets and indicates the narrower region in lock body chamber 3 under compression spring's effect, locking pearl 2031 chucking recess under the pressure of 3 inner walls in lock body chamber, pin main part 1012 is locked, thereby realize lockpin end 1 and battery end 2's being connected, install new battery package to the automobile body, realize the convenient change of battery package.

According to another aspect of the present disclosure, the present disclosure further provides an electric vehicle, where the electric vehicle includes a vehicle body and a battery pack, and further includes the quick-change locking mechanism assembly for replacing power provided by the present disclosure, the vehicle body is fixedly connected to the lock pin end 1, and the battery pack is fixedly connected to the battery end 2.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The utility model provides a trade quick change locking mechanism assembly for electricity, its characterized in that, including be used for with automobile body fixed connection's lockpin end (1), be used for with battery fixed connection's battery end (2), lockpin end (1) includes automobile body lockpin (101), battery end (2) include lock body (201), elastic component (202), can be by magnetic locking piece (203) of external magnetic field driven, lock body (201) have been seted up lock body chamber (3), magnetic locking piece (203) with elastic component (202) all are located in lock body chamber (3), patchhole (4) have been seted up on lock body (201), automobile body lockpin (101) can stretch into along the axial through this patchhole (4) lock body chamber (3), magnetic locking piece (203) are used for locking with unblocking the one end that automobile body lockpin (101) inserted lock body (201), elastic component (202) are located retaining member (203) is inhaled to magnetism with between the lock body, trade the electric quick change locking mechanism assembly structure for when no external magnetic field, elastic component (202) support retaining member (203) entering locking is inhaled to magnetism the locking position of automobile body lockpin (101), when being applyed external magnetic field, retaining member (203) is inhaled to magnetism can overcome elastic component (202) move in order to get into the release the unlocking position of automobile body lockpin (101).

2. The quick-change locking mechanism assembly for battery replacement according to claim 1, wherein the magnetic locking member (203) comprises a locking bead (2031) and a locking bead holder (2032), the locking bead holder (2032) is provided with a central hole (5) for the vehicle body locking pin (101) to pass through, a plurality of locking beads (2031) are circumferentially disposed in the locking bead holder (2032) and can move in the radial direction, the lock body cavity (3) is provided as a tapered cavity, the lock body cavity (3) is configured to taper towards the vehicle body in the axial direction, the elastic member (202) is disposed between one end of the locking bead holder (2032) far away from the vehicle body and the lock body (201), and when being attracted by an external magnetic field, the locking bead holder (2032) can move axially under the actuation of the magnetic field by overcoming the elastic force of the elastic member (202), the locking bead (2031) is radially movable in the wider position of the conical cavity into the unlocked position.

3. The quick-change locking mechanism assembly for battery replacement as recited in claim 2, characterized in that the elastic member (202) is provided as a compression spring, the locking ball holder (2032) is formed as a T-shaped structure comprising a guide section and a holding section which are axially fixed, the holding section is arranged close to the vehicle body and is used for accommodating the locking ball (2031), the guide section extends axially, and the compression spring is sleeved on the guide section and is positioned between the holding section and a part of the lock body (201) far away from the vehicle body.

4. The quick-change locking mechanism assembly for battery replacement according to claim 3, wherein the guide section is formed as a guide post (6) extending along the axial direction, the holding section is formed as a containing disc coaxial with the guide post (6), the guide post (6) is formed with a guide cavity (11), the containing disc is formed with a holding cavity provided with the central hole (5), a through hole for the locking bead (2031) to partially leak outwards along the radial direction is formed on the circumferential side wall of the holding cavity, the guide cavity (11) is coaxial with the central hole (5) and communicated with the central hole for the vehicle body locking pin (101) to penetrate, and the guide post (6) is fixedly connected with the side of the containing disc far away from the vehicle body.

5. The quick-change locking mechanism assembly for battery replacement according to any one of claims 1 to 4, wherein a mounting hole (7) for mounting the magnetic locking member (203) is formed in one surface of the lock body (201) away from the vehicle body, the lock body (201) further comprises a blocking cover (8), external threads are formed on the periphery of the blocking cover (8), internal threads matched with the external threads are formed in the inner wall of the mounting hole (7), an exhaust hole is formed in the blocking cover (8), and an operation hole for rotating the blocking cover (8) is formed in the blocking cover (8).

6. The quick-change locking mechanism assembly for battery replacement according to any one of claims 1-4, wherein the locking pin end (1) further comprises a locking pin box (102) for fixedly connecting with the vehicle body, an extending hole (9) is formed in the locking pin box (102), the vehicle body locking pin (101) comprises a fixing block (1011) and a locking pin main body (1012), the fixing block (1011) is located inside the locking pin box (102), one end of the locking pin main body (1012) is fixedly connected with the fixing block (1011), the other end of the locking pin main body (1012) extends out through the extending hole (9), and the length of the locking pin main body (1012) is far greater than the height of the locking pin box (102) in the axial direction.

7. The quick-change locking mechanism assembly for battery replacement as claimed in claim 6, wherein an annular groove for engaging with the magnetically attracting locking member (203) is formed in a peripheral wall of the locking pin main body (1012) along a circumferential direction.

8. The quick-change locking mechanism assembly for battery replacement as claimed in claim 6, wherein the locking pin main body (1012) is a cylinder, the extension hole (9) is a circular hole, the fixing block (1011) is a cylinder, the radius length of the locking pin main body (1012) is smaller than the length radius of the extension hole (9), and the radius length of the fixing block (1011) is larger than the radius length of the extension hole (9).

9. The quick-change locking mechanism assembly for battery replacement as claimed in claim 6, wherein an end of the lock pin body (1012) far from the fixing block (1011) is provided with a tip.

10. An electric vehicle, which comprises a vehicle body and a battery pack, and is characterized in that the electric vehicle comprises the quick-change locking mechanism assembly for battery replacement according to any one of claims 1 to 9, the vehicle body is fixedly connected with a lock pin end (1), and the battery pack is fixedly connected with a battery end (2).