CN115000636A

CN115000636A - Battery connecting device

Info

Publication number: CN115000636A
Application number: CN202210657552.4A
Authority: CN
Inventors: 赵豪儒; 王振涛; 张占江; 孙焕丽; 裴小娟; 吕晓谦
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-02

Abstract

The invention belongs to the technical field of electric automobiles, and discloses a battery connecting device, which comprises: the vehicle connection assembly comprises a connection sleeve; battery connection assembly, including locking unit and the control unit, wherein: the locking unit can be spirally and upwards connected into the connecting sleeve along a first direction after being subjected to external force or can be spirally and automatically downwards separated from the connecting sleeve along a second direction after being subjected to force unloading, and the control unit is used for limiting the locking unit to move upwards only along the first direction or downwards only along the second direction. The battery connecting assembly is arranged below the vehicle connecting assembly, the locking unit is spirally and upwardly connected to the connecting sleeve of the vehicle assembly after being subjected to external force, the locking unit is automatically separated from the connecting sleeve after the external force is removed, the control unit limits the locking unit to rotate in different directions, locking can be realized by vertical pushing, the rotary connection without bolt connection reduces the requirement on the structure of the auxiliary tray, the structure of the auxiliary tray is extremely simple, quick installation and removal of the battery and the vehicle are realized, and related structures are simplified.

Description

Battery connecting device

Technical Field

The invention relates to the technical field of electric automobiles, in particular to a battery connecting device.

Background

The charging speed of the electric automobile is low, so that the electric automobile cannot be popularized, the battery replacing package can solve the problems, the time from the time when the automobile arrives at the battery replacing station to the time when the automobile goes out of the battery replacing station is less than 5 minutes under the general condition, the speed can be comparable to the oiling speed, and the problems are effectively solved. The current battery replacement mechanism is divided into a plurality of realization modes such as a bolt fastening mode, a buckle fastening mode, a mode of simultaneously fastening a bolt and a buckle, and the like. The following are advantages and disadvantages of each fastening mode:

the advantage of buckle mode does: the mechanical life is longer, the connection speed is high and the connection is simple. The disadvantages are: the connecting mechanism is complex, the connecting mechanism has play quantity after being connected and fastened, impurities are easy to enter the mechanism, the problem of connection clamping stagnation is caused, and the locking reliability is poor.

The bolt mode has the advantages that: the connecting mechanism is simple, six directions are limited after connection and fastening, the play amount is avoided, and the locking reliability is high. The disadvantages are: traditional battery package and whole car connected mode, nevertheless as trading electric battery system, it needs often trade the electricity, and the wearing and tearing of bolt lead to its mechanical life low, and bolted connection trades the electricity speed slowly and supplementary tray structure is complicated.

The advantage of the bolt and buckle simultaneous fastening mode ensures strong locking reliability for two kinds of fastening, and has no play. The advantage of the bolt mode is that the mechanical life is prolonged, but the connection mechanism is complex, and the connection speed is slow due to the bolt connection.

Disclosure of Invention

The invention aims to provide a battery connecting device to solve the problems of complex structure and low connecting speed when a bolt connecting mode is adopted.

In order to achieve the purpose, the invention adopts the following technical scheme:

a battery connection device comprising:

the vehicle connecting assembly comprises a connecting sleeve;

battery connection assembly, including locking unit and the control unit, wherein:

the locking unit can be spirally upwards connected into the connecting sleeve along a first direction after being subjected to external force or can be spirally downwards separated from the connecting sleeve along a second direction after being subjected to force unloading, and the control unit is used for limiting the locking unit to move upwards only along the first direction or downwards only along the second direction.

As a preferable scheme of the battery connecting device, the inner wall of the connecting sleeve is provided with a containing groove;

the locking unit comprises a pin, a ball and a control rod, the pin is used for connecting the connecting sleeve, the ball can be movably arranged on the surface of the pin along the horizontal radial direction, the control rod is used for driving the ball to move between a first position and a second position relative to the central shaft of the pin, wherein:

when the sphere is located at the first position, the sphere can partially abut against the accommodating groove and lock the connecting sleeve and the locking unit, and when the sphere is located at the second position, the connecting sleeve and the locking unit can move relatively.

As a preferable embodiment of the above battery connecting device, a through hole for the ball to move is provided on the surface of the pin, when the pin is located at the end of the stroke of the pin in the connecting sleeve, the accommodating groove and the through hole are horizontally opposed, a channel extending upward is provided at the bottom of the pin, the channel is communicated with the through hole, one end of the control rod is movably disposed in the channel along the vertical direction, wherein:

the control rod can push the ball body to the first position at the lower end of the stroke of the control rod;

when the control rod is arranged at the upper end of the stroke of the control rod, the connecting sleeve can push the ball body to the second position.

As a preferable scheme of the above battery connecting device, a first groove and a second groove which are smoothly connected are sequentially formed in the surface of the control rod along the axial direction, and the groove depth of the first groove is smaller than that of the second groove.

As a preferable mode of the above battery connecting device, the control rod is always subjected to downward elastic force to return from the stroke upper end to the stroke lower end, and the control rod is subjected to external force to move from the stroke lower end to the stroke upper end.

As a preferable scheme of the battery connecting device, the upper end of the control rod is provided with a pushing surface and a bulge convexly arranged on the pushing surface;

a first spring is arranged in the channel, and one end of the first spring is sleeved on the protrusion and tightly abuts against the abutting surface.

As a preferable scheme of the battery connecting device, a gear is arranged below the through hole of the pin;

the control unit includes a first locking bar and a second locking bar, the first locking bar and the second locking bar selectively engage the gear, wherein:

when the first locking bar engages the pin, the locking unit can only move in the first direction;

when the second locking bar engages the pin, the locking unit can only move in the second direction.

As a preferable aspect of the above battery connecting device, the control unit further includes a control block, wherein:

when the control block moves upwards to a position between the first locking strip and the second locking strip under the action of external force, the first locking strip is meshed with the pin column;

the second locking bar engages the pin when the control block is moved downwardly between the first and second locking bars.

As a preferable embodiment of the above battery connecting device, the first locking bar is always subjected to a first elastic force that causes the first locking bar to approach the pin in the horizontal direction, and the first locking bar is provided with a first contact end that contacts the control block;

the second locking strip is always subjected to second elastic force enabling the second locking strip to be far away from the pin column along the horizontal direction, the second locking strip is provided with a second contact end which is in contact with the control block, and the second contact end is arranged between the first contact end and the pin column.

As a preferable scheme of the battery connecting device, a wedge-shaped control end part is arranged at the upper end of the control block, and the thickness of the control end part is gradually increased from top to bottom;

the first contact end and the second contact end are both provided with inclined planes facing the control end, and the inclined planes are oppositely arranged and can be in sliding fit with the control end.

As a preferable mode of the above battery connecting device, the control piece is always subjected to a third elastic force that makes it fall downward and disengage from between the first locking strip and the second locking strip.

As a preferable scheme of the battery connection device, the battery connection device further comprises a housing, the first locking strip and the second locking strip are both arranged in the housing, a second spring and a third spring are arranged on the inner wall of the housing, the second spring is connected with the first locking strip, and the third spring is connected with the second locking strip;

and a fourth spring is arranged in the shell and downwards pushes the control block.

As a preferable mode of the above battery connecting device, the lower end of the control rod and the lower end of the control block both extend out from the bottom of the housing, and when the locking unit is not subjected to an external force, the length of the lower end of the control rod extending out from the bottom of the housing is greater than the length of the lower end of the control block extending out from the bottom of the housing.

The invention has the beneficial effects that: the battery connection assembly is arranged below the vehicle connection assembly, the locking unit can be spirally and upwards connected to a connecting sleeve of the vehicle assembly after being subjected to external force, the locking unit can be automatically separated from the connecting sleeve after the external force is removed, the control unit can limit the locking unit to rotate in different directions, locking can be realized through vertical pushing, the non-bolt-connection rotary connection reduces the requirement on the auxiliary tray structure, the auxiliary tray structure is extremely simple, quick installation and unloading of a battery and a vehicle are realized, and related structures are simplified simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of a battery connecting device provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic structural diagram of a connection sleeve in a battery connection device provided in an embodiment of the present application;

fig. 4 is a schematic partial structural view of a battery connecting device provided in an embodiment of the present application;

fig. 5 is a schematic structural view of a pin in a battery connecting device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a control rod in the battery connecting device provided in the embodiment of the present application;

FIG. 7 is a schematic structural diagram of a battery connecting device according to an embodiment of the present disclosure when a locking unit and a control unit are engaged;

fig. 8 is a schematic structural diagram of a control unit in a battery connection device provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a control block of a control unit in the battery connection device according to the embodiment of the present application.

In the figure:

1-connecting sleeve; 10-a receiving groove;

2-a locking unit; 21-a pin; 22-sphere; 23-a control lever; 24-a first spring; 210-a channel; 2100-spring fixation groove; 211-a through hole; 212-gear; 231-a first groove; 232-a second groove; 233-pushing surface; 234-a bump;

3-a control unit; 31-a first locking bar; 32-a second locking bar; 33-a control block; 310-a first contact end; 320-a second contact end; 331-a control end; 302-a second spring; 303-a third spring; 304-a fourth spring;

4-shell.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used based on the orientations or positional relationships shown in the drawings for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

The embodiment provides a battery connecting device, which comprises a vehicle connecting assembly and a battery connecting assembly, wherein the vehicle connecting assembly is arranged on a vehicle body, the battery connecting assembly is arranged on a battery, and when the vehicle connecting assembly is connected with the battery connecting assembly, the vehicle body and the battery are connected with each other.

In this embodiment, the vehicle connection assembly is located above the battery connection assembly, in other words, the battery is connected to the vehicle body from bottom to top.

As shown in fig. 1 to 4, the vehicle connection assembly includes a connection sleeve 1, the battery connection assembly includes a locking unit 2 and a control unit 3, the locking unit 2 can be screwed upwards into the connection sleeve 1 in a first direction after receiving an external force or can be screwed downwards automatically to be separated from the connection sleeve 1 in a second direction after releasing the external force, and the control unit 3 is used for limiting the locking unit 2 to move upwards only in the first direction or downwards only in the second direction.

In this embodiment, the first direction is set to be the direction of arrow a shown in fig. 4, i.e., counterclockwise, and the second direction is the opposite direction of the first direction, i.e., clockwise. Moves up along the coupling sleeve 1 when the locking unit 2 is rotated in the counterclockwise direction, and moves down along the coupling sleeve 1 when the locking unit 2 is rotated in the clockwise direction.

It can be understood that, when the control unit 3 restricts the locking unit 2 and can only move along the first direction, under the exogenic action, the locking unit 2 is connected to the adapter sleeve 1 upwards, and because the locking unit can't move along the second direction, therefore the battery can not break away from when battery and vehicle body link to each other, when the control unit 3 restricts the locking unit 2 and can only move along the second direction, unload exogenic force, locking unit 2 will fall automatically this moment, thereby break away from adapter sleeve 1, realize battery and vehicle body phase separation, vertical promotion can realize locking, non-bolted connection's swivelling joint, require to reduce to supplementary tray structure, supplementary tray structure is very simple.

As shown in fig. 3, the inner wall of the connecting sleeve 1 is provided with a receiving groove 10, the receiving groove 10 is annular, and the plane of the receiving groove 10 is parallel to the horizontal plane.

The locking unit 2 comprises a pin 21, a ball 22 and a lever 23.

The pin 21 is used to fit the connecting sleeve 1, and the pin 21 is connected to the end of its stroke in the connecting sleeve 1, i.e. the receiving groove 10 and the through hole 211 are horizontally opposed when the pin 21 extends up to the deepest position of the connecting sleeve 1.

It should be noted that, be equipped with the thread groove in the adapter sleeve 1, the round pin post 21 is equipped with the thread, can dock each other when the round pin post 21 vertically upwards stretches into the adapter sleeve 1 to when adapter sleeve 1 is fixed, round pin post 21 can receive the guide effect spin of thread groove and go up and down, realizes cut straightly formula threaded connection, the restriction volume of scurrying simultaneously.

The ball 22 is movably arranged on the surface of the pin 21 along the horizontal radial direction. In this embodiment, a plurality of the spherical bodies 22 are provided and arranged along the same horizontal plane, and the spherical bodies 22 can be simultaneously engaged with or disengaged from the receiving grooves 10.

In this embodiment, six balls 22 are disposed on the surface of the pin 21, and any two adjacent balls 22 are spaced by 60 °.

The control rod 23 is used for driving the ball 22 to move between a first position and a second position relative to the central axis of the pin 21. The ball 22 can partially abut against the receiving groove 10 when located at the first position and cause the connecting sleeve 1 and the locking unit 2 to be locked. When the ball 22 is located at the second position, the connecting sleeve 1 and the locking unit 2 can move relatively.

It will be appreciated that the control rod 23 will drive the ball 22 to remain in the second position when the locking unit 2 is to be rotated upwards during the connection of the locking unit 2 to the coupling sleeve 1. When the locking unit 2 is inserted into the end of the connection sleeve 1, the control rod 23 drives the ball 22 to maintain the first position, i.e. to lock the connection sleeve 1 and the locking unit 2 to each other.

As shown in fig. 5, the surface of the pin 21 is provided with a through hole 211 for the movement of the ball 22, the bottom of the pin 21 is provided with a channel 210 extending upward, in this embodiment, the central axis of the channel 210 and the central axis of the pin 21 are coaxially arranged, and the channel 210 communicates with each through hole 211.

The upper end of the control rod 23 is movably disposed in the passage 210 in a vertical direction.

As shown in fig. 6, the through hole 211 extends in the radial direction of the pin 21 to communicate with the passage 210 with the shortest extending distance. The upper end of the control rod 23 is disposed in the passage 210, and the lower end of the control rod 23 protrudes from the lower end outlet of the passage 210.

The control rod 23 can push the ball 22 to the first position at the lower end of the stroke, so that the ball 22 can be locked with the connecting sleeve 1.

When the control rod 23 is at the upper end of its stroke, the connecting sleeve 1 can push the ball 22 to the second position, and move into the through hole 211 completely.

Thus, the engagement of the ball 22 with the sleeve 1 can be controlled by holding the control rod 23 in different positions of its stroke.

In this embodiment, the surface of the control rod 23 is provided with a first groove 231 and a second groove 232 which are smoothly connected, and the first groove 231 and the second groove 232 are arranged in sequence along the axial direction, and the depth of the first groove 231 is smaller than that of the second groove 232.

It will be appreciated that the ball 22 is further from the central axis of the control rod 23 when located in the first recess 231, i.e. protrudes further from the surface of the control rod 23, than when the ball 22 is located in the second recess 232.

Further, the control rod 23 is always subjected to downward elastic force to return from the upper end of the stroke to the lower end of the stroke, and the control rod 23 is subjected to external force to move from the lower end of the stroke to the upper end of the stroke.

It will be appreciated that, since the control rod 23 is always subjected to downward resilience, the external force applied upwards and overcoming the resilience will cause the control rod 23 to move upwards and thus the control ball 22 to move back from the first position to the second position. Therefore, when the battery is used, the control rod 23 can be adjusted in position when the battery moves upwards, the locking unit 2 can move relative to the connecting sleeve 1, when the battery is installed, the locking unit 2 is located at the tail end of the stroke of the connecting sleeve 1, the accommodating groove 10 is opposite to the ball 22, after external force is released, the control rod 23 descends, and the ball 22 is pushed to be clamped outwards to the accommodating groove 10, so that the battery installation is completed.

In this embodiment, the upper end of the control rod 23 is provided with a pushing surface 233 and a protrusion 234 protruding on the pushing surface 233.

The channel 210 is provided with a first spring 24, one end of the first spring 24 is sleeved on the protrusion 234 and tightly abuts against the pushing surface 233, and the first spring 24 applies downward elastic force to the control rod 23.

Optionally, the top of the channel 210 is provided with a spring fixing groove 2100 for receiving the first spring 24, and the spring fixing groove 2100 can circumferentially limit the first spring 24.

Further, the pin 21 has a gear 212 below the through hole 211.

As shown in fig. 7-9, the control unit 3 includes a first lock bar 31 and a second lock bar 32, the first lock bar 31 and the second lock bar 32 selectively engaging the gear 212.

When the first locking bar 31 engages the pin 21, the locking unit 2 can only move in the first direction.

When the second locking bar 32 engages the pin 21, the locking unit 2 can only move in the second direction.

The control unit 3 further comprises a control block 33, and when the control block 33 is moved upwards between the first locking strip 31 and the second locking strip 32 by an external force, the first locking strip 31 engages with the pin 21; the second locking bar 32 engages the pin 21 as the control block 33 is moved downwardly out of between the first locking bar 31 and the second locking bar 32.

In this embodiment, the first locking strip 31 is always subjected to the first elastic force that causes it to approach the pin 21 in the horizontal direction. The second locking strip 32 is always subjected to a second spring force that keeps it away from the pin 21 in the horizontal direction.

The first locking bar 31 is provided with a first contact end 310 which contacts the control block 33. The second locking bar 32 is provided with a second contact end 320 for contacting the control block 33, the second contact end 320 being arranged between the first contact end 310 and the pin 21.

It should be noted that, when the control block 33 is not moved between the first contact end 310 and the second contact end 320, the pulling force applied to the second locking bar 32 will press the first locking bar 31, and the first locking bar 31 will overcome the first elastic force, and at this time, the second locking bar 32 is not engaged with the pin 21, and the first locking bar 31 is engaged with the pin 21. When the control member 33 is moved between the first contact end 310 and the second contact end 320, the control member 33 causes the first locking bar 31 to overcome the first elastic force and simultaneously causes the second locking bar 32 to overcome the second elastic force, the first locking bar 31 is separated from the pin 21, and the second locking bar 32 is engaged with the pin 21.

The upper end of the control block 33 is provided with a wedge-shaped control end portion 331, and the thickness of the control end portion 331 is gradually increased from top to bottom. The first contact end 310 and the second contact end 320 are each provided with an inclined surface facing the control end 331, and the inclined surfaces are opposite to each other and can be in sliding fit with the control end 331.

The control piece 33 is always subjected to a third elastic force that makes it go down and disengage from between the first locking strip 31 and the second locking strip 32. Therefore, when no external force is applied, the control block 33 will not extend between the first locking strip 31 and the second locking strip 32, so that the first locking strip 31 will be pressed by the pulling force applied to the second locking strip 32, the first locking strip 31 will overcome the first elastic force, and at this time, the second locking strip 32 will not be engaged with the pin 21, and the first locking strip 31 is engaged with the pin 21.

In this embodiment, the battery connecting device further includes a housing 4, the first locking strip 31 and the second locking strip 32 are both disposed in the housing 4, the inner wall of the housing 4 is provided with a second spring 302 and a third spring 303, the second spring 302 is connected to the first locking strip 31, and the third spring 303 is connected to the second locking strip 32.

A fourth spring 304 is also arranged in the housing 4, the fourth spring 304 pushing the control block 33 downwards.

The lower end of the control lever 23 and the lower end of the control block 33 both extend from the bottom of the housing 4, and when the locking unit 2 is not subjected to an external force, the length of the lower end of the control lever 23 extending from the bottom of the housing 4 is greater than the length of the lower end of the control block 33 extending from the bottom of the housing 4. So that the control unit 3 responds before the locking unit 2 during the lifting of the battery, so that the locking unit 2 can be rotated into the connecting sleeve 1.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery connecting device, comprising:

the vehicle connecting assembly comprises a connecting sleeve (1);

battery connection assembly, including locking unit (2) and control unit (3), wherein:

the locking unit (2) can be connected to the inside of the connecting sleeve (1) in a spiral mode along a first direction after external force is applied or can be automatically separated from the connecting sleeve (1) in a spiral mode along a second direction after force is removed, and the control unit (3) is used for limiting the locking unit (2) to move upwards only along the first direction or move downwards only along the second direction.

2. The battery connecting device according to claim 1, wherein the connecting sleeve (1) is provided with a receiving groove (10) on the inner wall;

the locking unit (2) comprises a pin (21), a ball body (22) and a control rod (23), the pin (21) is used for connecting the connecting sleeve (1), the ball body (22) is movably arranged on the surface of the pin (21) along the horizontal radial direction, the control rod (23) is used for driving the ball body (22) to move between a first position and a second position relative to the central shaft of the pin (21), wherein:

when the sphere (22) is located at the first position, the sphere can partially abut against the containing groove (10) and cause the connecting sleeve (1) and the locking unit (2) to be locked, and when the sphere (22) is located at the second position, the connecting sleeve (1) and the locking unit (2) can move relatively.

3. The battery connecting device according to claim 2, wherein the surface of the pin (21) is provided with a through hole (211) for moving the ball (22), the accommodating groove (10) and the through hole (211) are horizontally opposite when the pin (21) is located at the end of its stroke in the connecting sleeve (1), the pin (21) is provided with a bottom provided with an upwardly extending channel (210), the channel (210) is communicated with the through hole (211), one end of the control rod (23) is movably arranged in the channel (210) along the vertical direction, wherein:

the control rod (23) can push the ball body (22) to the first position at the lower end of the stroke;

when the control rod (23) is arranged at the upper end of the stroke, the connecting sleeve (1) can push the ball body (22) to the second position.

4. The battery connecting device according to claim 3, wherein the surface of the control rod (23) is provided with a first groove (231) and a second groove (232) which are smoothly connected in sequence along the axial direction, and the groove depth of the first groove (231) is smaller than that of the second groove (232).

5. The battery connecting device according to claim 3, wherein the control rod (23) is always subjected to downward elastic force to return from the upper end of travel to the lower end of travel, and the control rod (23) is subjected to external force to move from the lower end of travel to the upper end of travel.

6. The battery connecting device according to claim 5, wherein the upper end of the control rod (23) is provided with a pushing surface (233) and a protrusion (234) convexly arranged on the pushing surface (233);

a first spring (24) is arranged in the channel (210), and one end of the first spring (24) is sleeved on the protrusion (234) and tightly abuts against the abutting surface (233).

7. The battery connecting device according to claim 2, wherein the pin (21) is provided with a gear (212) below the through hole (211);

the control unit (3) comprises a first locking bar (31) and a second locking bar (32), the first locking bar (31) and the second locking bar (32) selectively engaging the gear (212), wherein:

-said locking unit (2) is movable only in said first direction when said first locking bar (31) engages said pin (21);

when the second locking bar (32) engages the pin (21), the locking unit (2) can only move in the second direction.

8. The battery connection device according to claim 7, wherein the control unit (3) further comprises a control block (33), wherein:

when the control block (33) is moved upwards to a position between the first locking strip (31) and the second locking strip (32) under the action of external force, the first locking strip (31) is engaged with the pin (21);

the second locking bar (32) engages the pin (21) when the control block (33) is moved downwardly out of between the first (31) and second (32) locking bars.

9. The battery connecting device according to claim 8, wherein the first locking bar (31) is always subjected to a first elastic force that causes it to approach the pin (21) in the horizontal direction, the first locking bar (31) being provided with a first contact end (310) that contacts the control piece (33);

the second locking strip (32) is always subjected to second elastic force enabling the second locking strip to be far away from the pin column (21) along the horizontal direction, a second contact end (320) in contact with the control block (33) is arranged on the second locking strip (32), and the second contact end (320) is arranged between the first contact end (310) and the pin column (21).

10. The battery connecting device according to claim 9, wherein the upper end of the control block (33) is provided with a wedge-shaped control end portion (331), and the thickness of the control end portion (331) is gradually increased from top to bottom;

the first contact end (310) and the second contact end (320) are provided with inclined planes facing the control end portion (331), and the inclined planes are oppositely arranged and can be in sliding fit with the control end portion (331).

11. Battery connection device according to claim 9, characterized in that the control piece (33) is always subjected to a third spring force which causes it to move downwards and disengage from between the first locking strip (31) and the second locking strip (32).

12. The battery connecting device according to claim 11, further comprising a housing (4), wherein the first locking strip (31) and the second locking strip (32) are both disposed in the housing (4), a second spring (302) and a third spring (303) are disposed on an inner wall of the housing (4), the second spring (302) is connected to the first locking strip (31), and the third spring (303) is connected to the second locking strip (32);

a fourth spring (304) is further arranged in the shell (4), and the fourth spring (304) pushes the control block (33) downwards.

13. The battery connecting device according to claim 12, wherein the lower end of the control rod (23) and the lower end of the control block (33) both protrude from the bottom of the housing (4), and when the locking unit (2) is not subjected to an external force, the length of the lower end of the control rod (23) protruding from the bottom of the housing (4) is longer than the length of the lower end of the control block (33) protruding from the bottom of the housing (4).