CN114252203B

CN114252203B - New energy automobile battery case shell gas tightness detection device

Info

Publication number: CN114252203B
Application number: CN202111489201.9A
Authority: CN
Inventors: 杜维康; 柏玉
Original assignee: Swoboda Kunshan Co ltd
Current assignee: Swoboda Kunshan Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-07-04
Anticipated expiration: 2041-12-08
Also published as: CN114252203A

Abstract

The invention is applicable to the technical field of detection devices, and provides a new energy automobile battery box shell air tightness detection device, which comprises: the cistern, it intussuseption is filled with water liquid, eccentric drive assembly, lifting unit, direction spacing subassembly, adjusting part, the loading board, its swing joint in on the adjusting part, it has placed the battery case of waiting to detect on it, and, the air supply, place the battery case of waiting to detect on the loading board, first motor is after switching on external power source, its output can drive eccentric drive assembly and carry out eccentric rotation, lifting unit who is connected with eccentric drive assembly can drive the lifting plate of bottom and go up and down reciprocating motion, the lifting motion control that utilizes the lifting plate is connected with it and is adjusted the water liquid removal in the subassembly towards the cistern, utilize the air supply to fill compressed air towards in the battery case, when the battery case is immersed in the water liquid, if the battery case is sealed well, the seepage can not appear in its compressed air, the bubble can not appear on the water liquid surface.

Description

New energy automobile battery case shell gas tightness detection device

Technical Field

The invention belongs to the technical field of detection devices, and particularly relates to a new energy automobile battery box shell air tightness detection device.

Background

Along with development of electric vehicles, a power battery pack is used as a core component of the pure electric vehicles, the safety of the battery pack is gradually highlighted, the safety of the whole vehicle is directly influenced, various factors are required to be fully considered in development of the battery pack, advanced technical experience at home and abroad is required to be learned and absorbed, repeated verification and optimization are required for design schemes, and therefore the design requirements on strength, rigidity, heat dissipation, water resistance, insulation and the like of a battery box are very high, the design and tightness test of the battery box are very important, and the sealing test of the battery box and a core body of the small pure electric vehicles is particularly important.

In the traditional test scheme, the output voltage of the power battery pack of the pure electric vehicle is up to more than 200V, and the battery box body is required to effectively isolate contact between operators and passengers and the battery besides ensuring to contain the battery; the battery box body must be sealed waterproof, prevents to intake water and leads to the circuit short circuit, and the battery box body protection level requirement reaches IP67.

The traditional detection mode is that the conclusion is obtained by manual detection and observation and experience of operators, so that detection errors are easy to occur, and meanwhile, great labor cost is occupied.

Disclosure of Invention

The invention provides a new energy automobile battery box shell air tightness detection device, and aims to solve the problems in the background technology.

The invention is realized in such a way that a new energy automobile battery box shell air tightness detection device comprises: the cistern, its intussuseption have aqueous humor, eccentric drive assembly, its erect set up in one side top position of cistern, lifting unit, its detachable swing joint in on the eccentric drive assembly, and can follow the motion of eccentric drive assembly realizes reciprocal lift adjustment, direction spacing subassembly, its respectively symmetrical set up in lifting unit's both sides, and the bottom with the top rigid coupling of cistern, and be located eccentric drive assembly's inboard, it is used for to lifting unit's reciprocal elevating movement leads spacingly, adjusting part, it set up in on the lifting unit, and mobilizable extend to in the cistern, the loading board, its swing joint in on the adjusting part, the battery box of waiting to detect has been placed on it, and the air supply, it set up in on the eccentric drive assembly, and be used for carrying compressed air in the above-mentioned battery box.

Preferably, the eccentric drive assembly includes: two parallel erect set up in the pillar at cistern top, two all the rigid coupling has the installation piece on the top terminal surface that the pillar is close to mutually, every all rotate in the installation piece and be connected with the pivot, two the one end that the pivot is close to mutually all runs through corresponding the terminal surface of installation piece, and the off-center connecting axle that is provided with between the two, the both sides of connecting axle are provided with the connecting plate respectively, two the same side tip of connecting plate with the rigid coupling between the tip of connecting axle, and opposite side tip and correspond the rigid coupling between the tip of pivot, one side the outside rigid coupling of pillar has first motor, its output extends to corresponds in the installation piece, and with correspond the tip fixed connection of pivot.

Preferably, the lifting assembly includes: the first clamping block is arranged at the top of the connecting shaft, the second clamping block is arranged at the bottom of the connecting shaft, arc-shaped grooves which are attached to the outer wall of the connecting shaft are respectively formed in the end faces, close to the first clamping block and the second clamping block, extension blocks are formed in the two end parts of the first clamping block and the second clamping block in a uniform and integrated manner, each two extension blocks are oppositely arranged, the two extension blocks are fixedly locked through locking bolts and nuts, a sleeve is fixedly connected to the bottom of the second clamping block, adjusting threads are arranged on the inner wall of the sleeve, the adjusting screw is contained in the sleeve, the sleeve is connected with the adjusting threads in a screwed mode, and the lifting plate is movably connected to the bottom end of the adjusting screw.

Preferably, the bottom end of the adjusting screw is fixedly provided with a ball head accommodated in the lifting plate, a through groove is formed in the top of the lifting plate, and the aperture of the through groove is smaller than the outer diameter of the ball head and larger than the outer diameter of the adjusting screw.

Preferably, the guiding and limiting assembly comprises: the parallel two limiting plates are arranged between the two supporting columns, the two limiting plates are close to one end face of the lifting plate, first limiting grooves are formed in the height direction of the two limiting plates along the height direction of the lifting plate, second limiting grooves are formed in the inner walls of the two first limiting grooves, first limiting blocks are arranged on the two side walls of the lifting plate corresponding to the first limiting grooves, and second limiting blocks matched with the second limiting grooves are fixedly arranged on the outer walls of the first limiting blocks.

Preferably, the adjusting assembly comprises: the fixed mounting in the lifter plate is close to mounting panel on the cistern lateral wall, mutually perpendicular is provided with the diaphragm on the outer wall of mounting panel, the diaphragm below along its extending direction symmetry be provided with two connecting seats on the mounting panel, two rotate between the connecting seat and be connected with the axostylus axostyle, the top of axostylus axostyle extends to the diaphragm top, still be provided with rotating member on the diaphragm, it is used for the drive the axostylus axostyle rotates, be located two be provided with the external screw thread on the axostylus axostyle outer wall between the connecting seat, the spiro union that meshes on it has the slider, the loading board weld in on the outer wall of slider.

Preferably, the rotating member includes: the second motor is fixedly connected to the top of the transverse plate and positioned on one side of the shaft rod, a first driving wheel is sleeved on the output end of the second motor, a second driving wheel is sleeved on the outer wall of the top of the shaft rod, and a belt is connected between the first driving wheel and the second driving wheel in a driving way.

Preferably, a guide rod is fixedly connected between the two connecting seats at one side of the shaft rod, wherein the sliding block is sleeved on the outer side of the guide rod and is in sliding connection with the guide rod.

Preferably, the bearing plate is further provided with a clamping mechanism for clamping the battery box.

Preferably, the gas source comprises: the air pump is fixedly arranged on one side of the support column, and the air flow output port of the air pump is communicated and fixed with a telescopic hose, wherein compressed air is filled into the battery box through the telescopic hose.

Compared with the prior art, the invention has the beneficial effects that: the invention relates to a new energy automobile battery box shell air tightness detection device which comprises:

the battery box to be detected is placed on the bearing plate, then, after the external power supply is connected, the output end of the first motor can drive the eccentric driving assembly to eccentrically rotate, meanwhile, the lifting assembly connected with the eccentric driving assembly can drive the lifting plate at the bottom to lift and reciprocate, so that the lifting motion of the lifting plate is utilized to control the lifting assembly connected with the lifting assembly to move towards water liquid in the reservoir, compressed air is filled into the battery box towards the battery box by utilizing the air source, when the battery box is immersed in the water liquid, if the battery box is well sealed, the compressed air in the battery box cannot leak, and on the surface of the water liquid cannot generate bubbles, otherwise, if the battery box is poor in sealing, the compressed air can flow out along a gap to form bubbles on the water liquid, and therefore staff can observe the battery box more intuitively.

The adjusting component can control the depth of the battery box immersed in the water liquid, so that the sealing performance of the battery box under different water pressures can be detected according to the pressure of different water depths.

The guide limiting assembly can guide and control lifting and reciprocation of the lifting plate, so that the lifting plate is prevented from shifting towards other directions, and the accuracy of subsequent air tightness detection is guaranteed.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an overall construction and partial cross-sectional view of an eccentric drive assembly of the present invention;

FIG. 3 is a schematic view of a lifting assembly according to the present invention;

FIG. 4 is a schematic view of the installation of the adjusting screw and the ball head in the present invention;

FIG. 5 is a top view of a guide and stop assembly of the present invention;

FIG. 6 is a front view of an adjustment assembly of the present invention;

FIG. 7 is a side view of an adjustment assembly of the present invention;

FIG. 8 is a schematic sliding diagram of a shaft and a slider according to the present invention;

in the figure:

1. a reservoir;

2. an eccentric drive assembly; 21. a support post; 22. a mounting block; 23. a rotating shaft; 24. a connecting shaft; 25. a connecting plate; 26. a first motor;

3. a lifting assembly; 31. a first clamping block; 32. a second clamping block; 33. an arc-shaped groove; 34. an extension block; 35. a sleeve; 351. adjusting the screw thread; 36. adjusting a screw; 361. ball head; 37. a lifting plate; 371. trough passing;

4. a guide limit assembly; 41. a limiting plate; 42. a first limit groove; 43. the second limit groove; 44. a first limiting block; 45. a second limiting block;

5. an adjustment assembly; 51. a mounting plate; 52. a cross plate; 53. a connecting seat; 54. a shaft lever; 541. an external thread; 55. a rotating member; 551. a second motor; 552. a first driving wheel; 553. a second driving wheel; 554. a belt; 56. a slide block; 57. a guide rod;

6. a carrying plate;

7. a gas source; 71. an air pump; 72. and (5) a flexible hose.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and examples, it being understood that the specific examples described herein are for illustration only and are not intended to limit the present invention.

Referring to fig. 1-2, the present invention provides a technical solution,

a new energy automobile battery case shell gas tightness detection device includes: the water reservoir 1 is filled with water liquid, and the eccentric driving assembly 2 is vertically arranged at the top position of one side of the water reservoir 1;

the eccentric drive assembly 2 includes: the two parallel posts 21 that erect and set up in cistern 1 top, all the rigid coupling has installation piece 22 on the top terminal surface that two posts 21 are close to, all rotate in every installation piece 22 and be connected with pivot 23, the terminal surface that two pivots 23 are close to all runs through corresponding installation piece 22, and be provided with connecting axle 24 between the two decentration, connecting axle 24's both sides are provided with connecting plate 25 respectively, the rigid coupling between the same side tip of two connecting plates 25 and the tip of connecting axle 24, and the rigid coupling between opposite side tip and the tip that corresponds pivot 23, the outside rigid coupling of one side post 21 has first motor 26, its output extends to in the corresponding installation piece 22, and with the tip fixed connection that corresponds pivot 23.

Specifically, after the first motor 26 is powered on, the output end of the first motor rotates in the through hole formed in the support column 21 at one side, meanwhile, the rotating shaft 23 at one side connected with the first motor is driven to rotate, the rotating shaft 23 at the other side drives the connecting plate 25 connected with the first motor to rotate, the connecting plate 25 at the other side drives the connecting shaft 24 to rotate, the connecting plate 25 at the other side and the rotating shaft 23 follow the corresponding mounting block 22 to rotate, and accordingly the connecting shaft 24 can be driven by the first motor 26 to do circumferential eccentric rotation, control over the subsequent lifting and lowering assembly 3 is achieved, and lifting and reciprocating motions are driven.

In addition, for the sake of understanding, the two connection plates 25 each have an a end and a B end, wherein the a ends of the two connection plates 25 are fixedly connected to two ends of the connection shaft 24, and the B ends are fixedly connected to the corresponding rotation shaft 23, so that the connection shaft 24 can be driven to eccentrically rotate around the axis of the first motor 26.

It should be noted that, in this embodiment, the connection positions of the two rotating shafts 23 and the corresponding mounting blocks 22 are all provided with bearings, so that the friction force between the two rotating shafts can be reduced through the bearings, and thus the flexibility of the rotating shafts 23 during rotation can be effectively ensured, and the conditions of jamming and abrasion are avoided.

It should be appreciated that in order to ensure that the connecting shaft 24 can be stopped when it is lifted to the top and bottom ends, thereby achieving the air tightness detection of the battery box in the water, the first motor 26 is preferably a servo motor, and in other embodiments, the operator can use other kinds of motors for control, without any limitation.

Referring to fig. 1, 3-5, a lifting assembly 3 is detachably and movably connected to the eccentric driving assembly 2, and can realize reciprocating lifting adjustment along the motion of the eccentric driving assembly 2;

the lifting assembly 3 includes: the first clamping block 31 is arranged at the top of the connecting shaft 24, the second clamping block 32 is arranged at the bottom of the connecting shaft 24, wherein arc-shaped grooves 33 which are attached to the outer wall of the connecting shaft 24 are respectively formed on the end surfaces of the first clamping block 31 and the second clamping block 32, extension blocks 34 are uniformly formed on the two end parts of the first clamping block 31 and the second clamping block 32, each two oppositely arranged extension blocks 34 are locked and fixed through locking bolts and nuts, a sleeve 35 is fixedly connected to the bottom of the second clamping block 32, an adjusting thread 351 is arranged on the inner wall, an adjusting screw 36 is accommodated in the sleeve 35, and is in threaded connection with the adjusting thread 351, and a lifting plate 37 is movably connected to the bottom end of the adjusting screw 36;

the bottom end of the adjusting screw 36 is fixedly provided with a ball head 361 accommodated in the lifting plate 37, the top of the lifting plate 37 is provided with a through groove 371, and the aperture of the through groove 371 is smaller than the outer diameter of the ball head 361 and larger than the outer diameter of the adjusting screw 36.

Specifically, the outer wall of the connecting shaft 24 is respectively sleeved with the first clamping block 31 and the second clamping block 32 (the end surfaces of the first clamping block 31 and the second clamping block 32, which are provided with the arc grooves 33, are attached to the outer wall of the connecting shaft 24), preferably, the widths of the first clamping block 31 and the second clamping block 32 are consistent with the width of the connecting shaft 24, so that the eccentric driving assembly 2 can be ensured to shake in the moving process, the first clamping block 31 and the second clamping block 32 cannot shake, and meanwhile, in the embodiment, the extending blocks 34 are fixedly installed on the two end parts of the first clamping block 31 and the second clamping block 32, locking bolts penetrate through the two extending blocks 34 on the same side of the first clamping block 31 and the second clamping block 32, and nuts are screwed on the threaded ends of the locking bolts.

It should be noted that, the sleeve 35 is fixed to the bottom of the second clamping block 32, the adjusting screw 351 is disposed in the interior along the height direction thereof, and meanwhile, the adjusting screw 36 is detachably connected to the interior of the sleeve 35, and the specific disassembling manner thereof is as follows: the outer wall of the top end of the adjusting screw 36 is provided with a mating screw thread which is screw-coupled with the adjusting screw thread 351, so that when the operator rotates the adjusting screw 36, the interval between the lifting plate 37 and the second clamping block 32 can be adjusted.

It should be understood that, in this embodiment, the bottom of the adjusting screw 36 is movably provided with a lifting plate 37, which is specifically connected in the following manner: the ball head 361 is fixedly arranged at the bottom of the adjusting screw 36, meanwhile, the ball head 361 can be accommodated in the lifting plate 37, meanwhile, the top of the lifting plate 37 is provided with the through groove 371 communicated to the inside of the lifting plate, the aperture of the through groove 371 is smaller than the diameter of the ball head 361, the purpose is to prevent the ball head 361 from falling off, and meanwhile, the aperture of the through groove 371 is not smaller than the outer diameter of the adjusting screw 36, and the purpose is to facilitate the normal lifting swing of the subsequent adjusting screw 36.

Referring to fig. 1 and 5, guiding and limiting components 4 are symmetrically arranged at two sides of the lifting component 3, respectively, and the bottom of the guiding and limiting component is fixedly connected with the top of the reservoir 1 and is positioned at the inner side of the eccentric driving component 2, and is used for guiding and limiting the reciprocating lifting motion of the lifting component 3;

the guide limit assembly 4 includes: the two limiting plates 41 are arranged on two sides of the lifting plate 37 in parallel and located between the two support posts 21, the two limiting plates 41 are close to one end face of the lifting plate 37 and are provided with first limiting grooves 42 along the height direction, the inner walls of the two first limiting grooves 42 are also provided with second limiting grooves 43, the two side walls of the lifting plate 37 are provided with first limiting blocks 44 corresponding to the first limiting grooves 42, and the outer wall of each first limiting block 44 is fixedly provided with a second limiting block 45 matched with the corresponding second limiting groove 43.

Specifically, the limiting plates 41 on two sides can limit and guide the lifting plate 37 in the lifting process, so as to avoid the deviation of the lifting plate from the preset advancing track, specifically: the two side ends of the lifting plate 37 are respectively provided with a first limiting block 44 and a second limiting block 45, the adjacent end faces of the limiting plates 41 on the two sides are respectively provided with a first limiting groove 42 and a second limiting groove 43, the first limiting block 44 is accommodated in the first limiting groove 42, the second limiting block 45 is accommodated in the second limiting groove 43, and the guiding adjustment of the lifting plate 37 during lifting is realized in a double limiting and fixing mode.

It should be noted that, in some embodiments, the first limiting groove 42 is a rectangular groove, the first limiting block 44 is a rectangular block, meanwhile, the second limiting groove 43 is a semicircular groove, and the second limiting block 45 is a semicircular block, and in other embodiments, the sizes of the first limiting groove 42, the second limiting groove 43, the first limiting block 44 and the second limiting block 45 can be freely selected according to the actual needs of the staff, and no limitation is made here.

Referring to fig. 1, 6-8, an adjusting component 5 is disposed on the lifting component 3 and movably extends into the reservoir 1, a bearing plate 6 is movably connected to the adjusting component 5, and a battery box to be detected is placed on the bearing plate;

the adjusting assembly 5 comprises: the lifting plate 37 is fixedly arranged on the mounting plate 51 close to the side wall of the reservoir 1, the outer wall of the mounting plate 51 is vertically provided with a transverse plate 52, the mounting plate 51 below the transverse plate 52 is symmetrically provided with two connecting seats 53 along the extending direction of the transverse plate, a shaft rod 54 is rotationally connected between the two connecting seats 53, the top end of the shaft rod 54 extends to the upper side of the transverse plate 52, the transverse plate 52 is also provided with a rotating part 55 for driving the shaft rod 54 to rotate, the outer wall of the shaft rod 54 between the two connecting seats 53 is provided with an external thread 541, the external thread is engaged with a sliding block 56 in a screwed manner, and the bearing plate 6 is welded on the outer wall of the sliding block 56;

the rotating member 55 includes: the second motor 551 fixedly connected to the top of the transverse plate 52 and positioned at one side of the shaft lever 54 is provided with a first driving wheel 552 in a sleeved mode at the output end, a second driving wheel 553 in a sleeved mode at the outer wall of the top of the shaft lever 54, and a belt 554 is in transmission connection between the first driving wheel 552 and the second driving wheel 553;

the carrying plate 6 is also provided with a clamping mechanism for clamping the battery box.

Specifically, the staff places the battery box that waits to detect on loading board 6, realize the centre gripping fixed to the battery box through preset fixture on the loading board 6, thereby avoid its back appearance pine to take off etc. phenomenon, simultaneously, second motor 551 is after switching on external power source, its output drives first drive wheel 552 and rotates, first drive wheel 552 drives the second drive wheel 553 of opposite side through the belt 554 that sets up on it, second drive wheel 553 drives axostylus axostyle 54 and rotates in step under the support of two connecting seats 53 in the rotation process, when axostylus axostyle 54 rotates, external screw 541 on its outer wall can drive slider 56 and carry out high regulation, and then, can adjust the degree of depth of loading board 6 in cistern 1, thereby can detect the gas tightness of battery box under different water depth pressures.

In this embodiment, the second motor 551 may be preferably one of a servo motor, a stepping motor, and a dc motor, and in other embodiments, a worker may use other types of motors to control the motor, which is not limited herein.

As a supplement to the above embodiment, referring to fig. 7, a guide rod 57 is further fixedly connected between two connection seats 53 located at one side of the shaft 54, where the slider 56 is sleeved on the outer side of the guide rod 57 and is slidably connected with the guide rod 57.

Specifically, the guide rod 57 can guide and control the sliding of the sliding block 56, so that the phenomena of dislocation, shaking and the like are avoided, and the accuracy and the efficiency of the follow-up air seal test are further ensured.

Referring to fig. 1, an air source 7 is disposed on the eccentric driving assembly 2 and is used for delivering compressed air into the battery box;

the air source 7 includes: the air pump 71 fixedly installed on one side of the support column 21 is provided with a telescopic hose 72 connected and fixed to the air outlet, wherein the telescopic hose 72 is used for filling compressed air into the battery box.

Specifically, by activating the air pump 71 so that it delivers compressed air into the bellows 72, then, compressed air is blown into the battery case by the bellows 72, and finally, the battery case is immersed in the reservoir 1 to realize air tightness detection thereof.

The working principle and the using flow of the invention are as follows: after the invention is installed, the invention is characterized in that:

compressed air is blown into the battery box clamped and fixed on the bearing plate 6 by utilizing the air source 7, then the eccentric driving assembly 2 drives the lifting assembly 3 to lift and adjust, and then the adjusting assembly 5 is driven to be immersed into the water reservoir 1 under the guiding action of the guiding limiting assembly 4, and the air tightness detection of the battery box on the bearing plate 6 under the water pressure of different depths is realized by adjusting the height of the bearing plate 6 on the adjusting assembly 5.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The utility model provides a new energy automobile battery case shell gas tightness detection device which characterized in that includes:

a reservoir (1) filled with water;

an eccentric driving assembly (2) which is vertically arranged at the top position of one side of the reservoir (1);

the lifting assembly (3) is detachably and movably connected to the eccentric driving assembly (2) and can realize reciprocating lifting adjustment along the movement of the eccentric driving assembly (2);

the guide limiting assemblies (4) are symmetrically arranged on two sides of the lifting assembly (3) respectively, the bottom of the guide limiting assemblies is fixedly connected with the top of the reservoir (1) and positioned on the inner side of the eccentric driving assembly (2), and the guide limiting assemblies are used for guiding and limiting the reciprocating lifting motion of the lifting assembly (3);

the adjusting component (5) is arranged on the lifting component (3) and movably extends into the water reservoir (1);

the bearing plate (6) is movably connected to the adjusting component (5), and a battery box to be detected is placed on the bearing plate; the method comprises the steps of,

a gas source (7) which is arranged on the eccentric driving assembly (2) and is used for conveying compressed air into the battery box;

the eccentric drive assembly (2) comprises:

two struts (21) which are arranged on the top of the reservoir (1) in parallel in a standing manner;

the top end faces of the two struts (21) close to each other are fixedly connected with mounting blocks (22), and a rotating shaft (23) is rotatably connected in each mounting block (22);

one ends of the two rotating shafts (23) close to each other penetrate through the end face corresponding to the mounting block (22), and a connecting shaft (24) is eccentrically arranged between the two rotating shafts;

the two sides of the connecting shaft (24) are respectively provided with a connecting plate (25), the end parts of the same side of the two connecting plates (25) are fixedly connected with the end parts of the connecting shaft (24), and the end parts of the other side are fixedly connected with the end parts corresponding to the rotating shaft (23);

the outer side of the support column (21) at one side is fixedly connected with a first motor (26), and the output end of the first motor extends into the corresponding mounting block (22) and is fixedly connected with the end part corresponding to the rotating shaft (23);

the lifting assembly (3) comprises:

a first clamping block (31) provided on the top of the connecting shaft (24);

a second clamping block (32) provided at the bottom of the connecting shaft (24);

wherein, arc-shaped grooves (33) which are attached to the outer wall of the connecting shaft (24) are respectively arranged on the end surfaces of the first clamping block (31) and the second clamping block (32) which are close to each other;

extension blocks (34) are uniformly formed at two end parts of the first clamping block (31) and the second clamping block (32), and each two extension blocks (34) which are oppositely arranged are locked and fixed through locking bolts and nuts;

a sleeve (35) fixedly connected to the bottom of the second clamping block (32), and an adjusting thread (351) is arranged on the inner wall;

an adjusting screw (36) accommodated in the sleeve (35) and screwed with the adjusting screw thread (351);

and the lifting plate (37) is movably connected with the bottom end of the adjusting screw rod (36).

2. The new energy automobile battery box shell air tightness detection device according to claim 1, wherein a ball head (361) accommodated in the lifting plate (37) is fixedly arranged at the bottom end of the adjusting screw (36);

the top of the lifting plate (37) is provided with a through groove (371);

the aperture of the through groove (371) is smaller than the outer diameter of the ball head (361) and larger than the outer diameter of the adjusting screw (36).

3. The new energy automobile battery case shell air tightness detection device according to claim 2, wherein the guiding and limiting assembly (4) comprises:

two limiting plates (41) which are arranged on two sides of the lifting plate (37) in parallel and are positioned between the two support posts (21);

a first limit groove (42) is formed in one end face, close to the lifting plate (37), of the two limit plates (41) along the height direction of the two limit plates;

and, the inner walls of the two first limit grooves (42) are also provided with second limit grooves (43);

first limiting blocks (44) are arranged on two side walls of the lifting plate (37) corresponding to the first limiting grooves (42), and second limiting blocks (45) matched with the second limiting grooves (43) are fixedly arranged on the outer wall of each first limiting block (44).

4. The new energy automobile battery case housing tightness detection device according to claim 2, wherein the adjusting assembly (5) comprises:

the mounting plate (51) is fixedly arranged on the lifting plate (37) close to the side wall of the reservoir (1);

a transverse plate (52) is vertically arranged on the outer wall of the mounting plate (51);

two connecting seats (53) are symmetrically arranged on the mounting plate (51) below the transverse plate (52) along the extending direction of the mounting plate, and a shaft lever (54) is rotationally connected between the two connecting seats (53);

the top end of the shaft lever (54) extends to above the transverse plate (52);

the transverse plate (52) is also provided with a rotating part (55) which is used for driving the shaft lever (54) to rotate;

an external thread (541) is arranged on the outer wall of the shaft lever (54) between the two connecting seats (53), and a sliding block (56) is connected on the external thread in a meshed and screwed manner;

the bearing plate (6) is welded on the outer wall of the sliding block (56).

5. The new energy automobile battery case housing-tightness detecting device according to claim 4, wherein the rotating member (55) comprises:

the second motor (551) is fixedly connected to the top of the transverse plate (52) and positioned at one side of the shaft lever (54), and the output end of the second motor is sleeved with a first driving wheel (552);

a second driving wheel (553) is sleeved on the outer wall of the top of the shaft lever (54);

a belt (554) is in transmission connection between the first transmission wheel (552) and the second transmission wheel (553).

6. The new energy automobile battery box shell air tightness detection device according to claim 5, wherein a guide rod (57) is fixedly connected between two connecting seats (53) positioned on one side of the shaft lever (54);

the sliding block (56) is sleeved on the outer side of the guide rod (57) and is in sliding connection with the guide rod (57).

7. The new energy automobile battery case shell air tightness detection device according to claim 6, wherein a clamping mechanism for clamping the battery case is further arranged on the bearing plate (6).

8. The new energy automobile battery case housing tightness detection device according to claim 1, wherein the air source (7) comprises:

an air pump (71) fixedly arranged on one side of the support column (21), and a telescopic hose (72) is fixedly communicated with an air flow outlet of the air pump;

wherein compressed air is filled into the battery box through the telescopic hose (72).