CN215894245U - Auxiliary tool for battery cavity pressing test - Google Patents

Abstract

The utility model provides an auxiliary tool for a battery cavity body pressing test, which comprises a bottom plate for bearing a battery and a fixing unit for fixing the battery on the bottom plate. In addition, auxiliary fixtures is still including locating on the bottom plate and the position adjustable base to and locate the ventilation piece on the base. The vent piece can be just opposite to the pressing hole on the battery along with the position adjustment of the base; meanwhile, the vent piece can move towards the pressing hole and abut against the pressing hole to form communication between the cavity inside the battery and the pressing device. According to the auxiliary tool for the battery cavity body pressure test, the fixing unit is used for fixing the position of the battery on the bottom plate in advance, the base is adjusted to enable the air vent to be opposite to the pressure hole, then the air vent is operated to move to abut against the pressure hole, communication between the cavity body of the battery and the pressure device is formed, the pressure test requirements of batteries with different sizes and specifications can be met, the assembling operation of pressure air channel communication can be conveniently completed, and the subsequent pressure test can be carried out.

Description

Auxiliary tool for battery cavity pressing test

Technical Field

The utility model relates to the technical field of battery testing, in particular to an auxiliary tool for a battery cavity pressing test.

Background

At the present stage, as the electric automobile is driven into a high-speed development track, the power battery also comes with an unprecedented increase surge. The demand of power lithium ion batteries is getting bigger and bigger, and various new energy companies invest in and develop various new types of batteries.

With the development of new energy, the size of a power battery is more and more, but the assembly process of batteries with various specifications is always not separated from laser welding, and the manufacturing and welding from a lithium ion battery to a battery pack are an important manufacturing process. The welding strength and the air tightness of the lithium battery are one of indexes for evaluating the welding quality of the battery, and the selection of a welding method and a welding process directly influences the cost, the quality, the safety and the consistency of the lithium battery.

Among the various welding methods, the lithium ion battery processing laser welding highlights the following advantages: firstly, the laser welding has high energy density, small welding deformation and small heat affected area, and can effectively improve the precision of parts; the welding seam is smooth, free of impurities, uniform and compact, and does not need extra grinding. Secondly, laser welding can be accurately controlled, the focus point is small, the positioning accuracy is high, the automation of the mechanical arm is easy to realize, the welding efficiency is improved, the labor time is reduced, and the cost is reduced. In addition, laser welded thin plates or thin-diameter steel wires are not as susceptible to failure as arc welding, and during the welding process of the power lithium ion battery, welding process and technicians select appropriate laser welding process parameters according to the required shape, thickness and tension of the battery material. And reasonable welding technological parameters are set according to the requirements of welding speed, waveform, peak and welding head inclination angle. After laser welding is finished, a special tool is needed to test the welding strength of the product, the final welding result is guaranteed to meet the requirements of power lithium battery manufacturers, and the quality and the safety of the product are guaranteed.

In the testing process, aiming at the assembling and welding process, the pressure resistance detection is needed to be carried out on the cavity inside the battery, and the special testing tool is utilized to carry out the test on the welding strength and the sealing performance.

The existing test tool is manufactured aiming at the battery with a specific size specification, and the number of the test tool for pressing the welding strength of the battery is continuously increased due to the actual condition of a generated line in the using and managing process. Specifically, during the use of the tool, the tool is needed to be designed corresponding to each product, and a supplier needs to manufacture a corresponding product testing tool for a newly developed product after the development of the new product. Because of the battery product model numerous of research and development, lead to battery welding strength to suppress test fixture quantity kind and also increase constantly, directly increase unnecessary frock purchase processing cost and frock administrative cost, simultaneously because of single frock weight is heavier in the use, the manual work is remodeled and is carried extremely inconveniently, influences product test work efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to provide an auxiliary tool for a crush test of a battery cavity, so as to meet crush test requirements of batteries with different dimensions.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

an auxiliary tool for a battery cavity body pressing test comprises a bottom plate and a fixing unit, wherein the bottom plate is used for bearing a battery, and the fixing unit is used for fixing the battery on the bottom plate;

the auxiliary tool further comprises a base which is arranged on the bottom plate and is adjustable in position, and an air ventilation piece which is arranged on the base; along with the position adjustment of the base, the ventilation piece can be over against the pressing hole on the battery; the vent piece can move towards the pressing hole and abut against the pressing hole to form communication between the cavity inside the battery and the pressing device.

Further, the fixing unit comprises a top plate fixedly arranged above the bottom plate, a pressing plate capable of moving between the bottom plate and the top plate in an up-and-down guiding manner, and a driving mechanism capable of driving the pressing plate to move; the driving mechanism is controlled to drive the pressing plate to move downwards so as to press the battery on the bottom plate.

Furthermore, the driving mechanism comprises a screw rod which is rotatably arranged on the top plate and a sleeve which is fixedly connected to the pressing plate; the screw rod is connected with the sleeve in a threaded manner, and the sleeve moves up and down relative to the top plate along with the rotation of the screw rod so as to drive the pressing plate to move.

Furthermore, a nut is fixedly installed at the top of the sleeve, and the lead screw is in threaded connection with the nut; and a blocking piece for preventing the screw rod from being separated from the screw cap is fixedly arranged at the bottom of the screw rod.

Furthermore, a hand wheel is arranged at the top of the lead screw.

Furthermore, a guide post is arranged between the bottom plate and the top plate, and a connecting plate capable of moving in a guiding manner is arranged on the guide post; the pressing plate is fixedly arranged at the bottom of the connecting plate, and the driving mechanism is connected to the top of the connecting plate.

Furthermore, a rear positioning block and/or a side positioning block for positioning the battery placing position are arranged on the bottom plate, and the positions of the rear positioning block and/or the side positioning block are adjustable.

Furthermore, the base is provided with a fixing hole, and a plurality of groups of first threaded holes are distributed in the bottom plate; the base is fastened on a group of the first threaded holes through fasteners penetrating through the fixing holes; the base is provided with an adjusting block with an adjustable upper position and a lower position, and the ventilation piece is arranged on the adjusting block.

Furthermore, the ventilation piece comprises a ventilation rod with external threads, and the adjusting block is provided with a threaded hole; the ventilation rod is screwed in the screw connection hole, and the ventilation rod can approach or be far away from the pressing hole by rotating.

Furthermore, a sealing ring is arranged at the butt joint end of the ventilation rod, which is used for abutting against the pressing hole; and a quick-connection plug is arranged at the other end of the ventilation rod relative to the butt joint end.

Compared with the prior art, the utility model has the following advantages:

according to the auxiliary tool for the battery cavity body pressure test, the base with the adjustable position is arranged on the bottom plate, the ventilating piece is movably assembled on the base, the position of the battery on the bottom plate is fixed in advance by the fixing unit, the base is adjusted to enable the ventilating piece to be opposite to the pressure hole, then the ventilating piece is operated to move to abut against the pressure hole, communication between the battery cavity body and the pressure device is formed, the pressure test requirements of batteries with different sizes and specifications can be met, the assembling operation of pressure air channel communication is conveniently completed, and the subsequent pressure test is carried out.

Meanwhile, a screw rod transmission mode of a screw rod and a sleeve is adopted, the sleeve can be driven to move up and down by rotating the screw rod, so that the pressing plate is driven to compress and release the battery, the operation is simple and convenient, and the structural performance is stable.

In addition, the base is fixed through the fastening piece, so that the technical implementation is facilitated, and the fastening performance is reliable. A plurality of groups of first threaded holes are arranged, so that the position of the base can be adjusted according to the conditions of batteries with different sizes; the ventilation piece is arranged on the adjusting block with the adjustable upper and lower positions, so that the battery pressing hole height adjusting device can adapt to the changing conditions of the pressing hole height positions of batteries with different sizes.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate embodiments of the utility model and together with the description serve to explain the utility model, and the description is given by way of example only and without limitation to the terms of relative positions. In the drawings:

fig. 1 is a schematic overall structure diagram of an auxiliary tool for a battery cavity crush test according to an embodiment of the present invention;

FIG. 2 is a schematic partial cross-sectional view of a driving mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic view of an assembly structure of a base and a ventilation bar according to an embodiment of the present invention;

description of reference numerals:

1. a base plate; 100. a first threaded hole; 101. a support pillar; 102. a top plate; 103. a guide post; 104. an upper base plate; 105. a connecting plate; 106. a linear bearing; 107. pressing a plate; 108. a lower base plate;

2. a lead screw support; 20. a hand wheel; 200. a handle; 21. a lead screw; 210. a baffle plate; 22. a sleeve; 220. a nut;

30. a ventilation bar; 300. a butt joint end; 301. a rotating part; 31. a seal ring; 32. a quick connector;

4. a base; 400. a fixing hole; 41. a strut; 410. a strip hole; 42. an adjusting block; 420. a second threaded hole; 421. screwing holes;

5. a fastener; 50. mounting holes; 500. a rear positioning block; 501. a side positioning block; 6. a battery; 600. and (5) pressing the hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, 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; the appearances of the terms first, second, etc. in the figures are also for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to an auxiliary tool for a battery cavity pressing test, which is used for meeting the pressing test requirements of batteries with different sizes and specifications.

In general, the auxiliary tool comprises a bottom plate for bearing the battery and a fixing unit for fixing the battery on the bottom plate; moreover, the auxiliary tool further comprises a base which is arranged on the bottom plate and is adjustable in position, and an air ventilation piece which is arranged on the base. When the battery is operated and used, the ventilation piece can be just opposite to the pressing hole on the battery along with the position adjustment of the base; and the vent piece can move towards the pressing hole and abut against the pressing hole so as to form communication between the cavity in the battery and the pressing device.

Based on the design concept, an exemplary structure of the auxiliary tool for the battery cavity crush test of the present embodiment is shown in fig. 1, and mainly includes a bottom plate 1, a fixing unit, a base 4, and a vent.

The bottom plate 1 is used for bearing the battery 6, and the fixing unit is used for fixing the battery 6 on the bottom plate 1. In order to meet the purpose of meeting the requirement of the pressing test of batteries 6 with different sizes and specifications, the base 4 with adjustable position is arranged on the bottom plate 1. After the battery 6 is fixed on the bottom plate 1, the vent piece can be opposite to the pressing hole 600 on the battery 6 by adjusting the position of the base 4 (the pressing hole 600 is generally a liquid injection hole on the battery 6). Thereafter, the vent is operated to move toward the pressing hole 600 and abut on the pressing hole 600 to establish communication between the cavity inside the battery 6 and the pressing means.

For the fixing unit, the fixing can be realized by pressing a pressing plate, positioning a positioning plate and the like. In the present embodiment, specifically, as shown in fig. 1 and 2, the fixing unit includes a top plate 102 fixed above the bottom plate 1, a pressing plate 107 capable of moving between the bottom plate 1 and the top plate 102 in an up-and-down guiding manner, and a driving mechanism capable of driving the pressing plate 107 to move. The supporting columns 101 are fixedly arranged at four corners of the bottom plate 1, and the top parts of the four supporting columns 101 are fixedly connected with the top plate 102 so as to support and fix the top plate 102; thus, the drive mechanism can be mounted on the top plate 102. The battery 6 can be pressed against the base plate 1 by operating the driving mechanism to drive the pressing plate 107 to move downward. The top plate 102 is arranged to facilitate installation of the driving mechanism, and the pressing plate 107 moving up and down is used to press the battery 6, so as to facilitate fixation of the battery 6 on the bottom plate 1 in a clamping manner.

The driving mechanism can be in the form of a cylinder, a push rod and the like. Preferably, the driving mechanism comprises a lead screw 21 rotatably provided on the top plate 102, the lead screw 21 being mountable on the top plate 102 via a lead screw support 2. Meanwhile, a sleeve 22 is fixedly arranged on the pressure plate 107; the screw 21 is connected with the sleeve 22 by screw, and as the screw 21 rotates, the sleeve 22 moves up and down relative to the top plate 102, and drives the pressing plate 107 to move. By adopting a screw transmission mode of the screw 21 and the sleeve 22, the sleeve 22 can be driven to move up and down by rotating the screw 21 so as to drive the pressing plate 107 to compress and release the battery 6, so that the operation is simple and convenient, and the structural performance is stable.

It should be noted here that a connecting plate 105 and an upper shim plate 104 may be added between the sleeve 22 and the pressure plate 107. By providing two guide posts 103 between the base plate 1 and the top plate 102, the connecting plate 105 is provided on the guide posts 103 so as to be movable in a guide manner. The pressure plate 107 is fixedly arranged at the bottom of the connecting plate 105; the upper plate 104 is secured to the top of the web 105 and is connected between the sleeve 22 and the web 105. By arranging the guide posts 103 and the connecting plate 105, the guide movement stability of the pressing plate 107 can be improved, and the fixed connection assembly between the sleeve 22 and the pressing plate 107 is facilitated; at the same time, it is preferable to fit the link plate 105 to the guide post 103 using a linear bearing 106 to further improve the guide movement performance.

In order to prevent the bottom of the battery 6 from being worn by the base plate 1, a lower backing plate 108 may be padded on the base plate 1 for bearing the placement of the battery 6.

As shown in fig. 2, the screw 21 is prevented from moving up and rotating too much and being entirely removed from the sleeve 22. A nut 220 is fixedly arranged at the top of the sleeve 22, and the screw rod 21 is screwed on the nut 220; meanwhile, a blocking piece 210 for preventing the lead screw 21 from separating from the nut 220 is fixedly arranged at the bottom of the lead screw 21. The stopper 210 may be fastened to the screw shaft 21 by a fastener 5 such as a bolt. A plurality of mounting holes 50 are formed in the upper end and the lower end of the sleeve 22, the mounting hole 50 in the top end is used for fixedly mounting the nut 220, and the mounting hole 50 in the bottom end is used for fixedly connecting the sleeve 22 and the connecting plate 105. By providing the nut 220 and the stopper 210, in addition to preventing the lead screw 21 from coming out of the sleeve 22, the assembly between the lead screw 21 and the sleeve 22, and between the sleeve 22 and the link plate 105, is facilitated.

For convenience of operation, in the present embodiment, a hand wheel 20 is provided on the top of the screw 21. A hand wheel 20 is additionally arranged on the screw 21 to facilitate manual operation so as to drive the screw 21 to rotate; the handle 200 which can be folded and retracted can be further installed on the hand wheel 20, so that the operation is more smooth, and the handle 200 can be retracted to reduce the overall height of the tool when the rotation operation of the lead screw 21 is not performed.

Further, as also shown in fig. 1, a rear positioning block 500 or a side positioning block 501 for positioning the position where the battery 6 is placed may be further provided on the base plate 1. Wherein, the rear positioning block 500 is arranged at the opposite side of the base 4 to position the bottom position of the battery 6; the side positioning block 501 is provided at a side portion of the base plate 1 to position a side of the battery 6. Of course, the rear positioning block 500 and the side positioning block 501 may be disposed, and the positions of the rear positioning block 500 and the side positioning block 501 may be adjustable to adapt to batteries 6 with different sizes.

The position adjustment mode of the rear positioning block 500 and the side positioning block 501 can adopt a form of a guide groove and a locking structure, a row of threaded holes can also be processed on the bottom plate 1, and the rear positioning block 500 and the side positioning block 501 are fixed by selecting different threaded holes so as to change the positions of the rear positioning block 500 and the side positioning block 501. Finally, when the battery 6 is placed on the bottom plate 1 by the positioning block 500 and the side positioning block 501 after being attached tightly, the battery 6 is centered on the bottom plate 1, and the pressing hole 600 and the vent are located at the same coordinate position in the length direction of the bottom plate 1 (i.e., the vent and the pressing hole 600 can be directly opposite by only adjusting the height position of the vent).

The rear positioning block 500 and the side positioning block 501 with adjustable positions are arranged on the bottom plate 1, so that the positions of the rear positioning block 500 and the side positioning block 501 can be correspondingly adjusted according to the appearance size of the battery 6, the battery 6 is conveniently positioned and placed, and the fixing stability of the battery 6 on the bottom plate 1 can be improved; also, the alignment adjustment of the punch hole 600 and the vent on the battery 6 can be preliminarily achieved.

As shown in fig. 1 and fig. 3, in the present embodiment, a fixing hole 400 is formed on the base 4, and meanwhile, a plurality of groups of first threaded holes 100 are distributed on the bottom plate 1; the base 4 is fastened to the set of first threaded holes 100 by fasteners 5 inserted through the fixing holes 400. The first screw holes 100 are preferably arranged along the width direction of the base plate 1, and the position of the base 4 in the width direction of the base plate 1 can be changed to meet the requirements of the batteries 6 with different heights (in fig. 1, the height direction of the batteries 6 is consistent with the width direction of the base plate 1).

Meanwhile, an adjusting block 42 whose up-down position is adjustable is provided on the base 4, and the breather is mounted on the adjusting block 42. The base 4 is fixed by the fastener 5, so that the technical implementation is convenient, and the fastening performance is reliable. A plurality of groups of first threaded holes 100 are arranged, so that the position of the base 4 can be adjusted according to the condition of batteries 6 with different sizes; the ventilation piece is arranged on the adjusting block 42 with the adjustable up-down position, so that the ventilation piece can adapt to the height position change of the pressing hole 600 of batteries 6 with different sizes.

The manner of adjustment block 42, and the manner of attachment of the breather to adjustment block 42, may be flexibly designed based on the general principles of the present invention. In a preferred form, as shown in fig. 3, in the present embodiment, the base 4 is configured with a bracket, which may be two spaced-apart supporting rods 41, and the adjusting block 42 is mounted on the two supporting rods 41. Two vertical strip holes 410 are formed in the two support rods 41, two second threaded holes 420 are formed in the adjusting block 42 corresponding to the two strip holes 410. The adjusting block 42 can be locked on the supporting rod 41 by two fasteners 5 which pass through the long hole 410 and are screwed in the second threaded holes 420; the height position of the adjusting block 42 can be adjusted by loosening the fastening piece 5, and the fastening piece 5 is tightened after the adjustment is in place.

Further, the vent is preferably in the form of a vent rod 30 having an external thread, and a threaded hole 421 is provided in the adjustment block 42. The ventilation bar 30 is screwed into the screw hole 421, and the ventilation bar 30 is rotated to move in the width direction of the base plate 1 so as to approach or separate from the pressing hole 600. The ventilation piece adopts a ventilation rod 30 with external threads, and the ventilation rod 30 can be close to or far away from the pressurizing hole 600 by rotating the ventilation rod 30 so as to realize the abutting communication between the ventilation rod 30 and the pressurizing hole 600; simple and reliable structure and convenient processing. In order to facilitate the rotation of the ventilation bar 30, a hexagonal-threaded-cylindrical rotating portion 301 may be formed on the ventilation bar 30, so that the ventilation bar 30 can be rotated by a wrench, so that the abutting end 300 of the ventilation bar 30 is pressed against the pressing hole 600.

Meanwhile, a sealing ring 31 can be additionally arranged at the butt joint end 300 of the ventilation rod 30 for abutting against the pressing hole 600; at the other end, a quick connector 32 is mounted. The both ends of ventilation bar 30 set up sealing washer 31 and quick connector 32 respectively, not only can ensure ventilation bar 30 butt joint end 300 and suppress the sealed effect between the hole 600, and be convenient for suppress the grafting operation of intercommunication pipeline and ventilation bar 30 between device and the ventilation bar 30 to accomplish fast and suppress the intercommunication assembly of the cavity of device and battery 6.

In conclusion, the auxiliary fixtures for battery cavity suppress test of this embodiment, through base 4 that sets up adjustable position on bottom plate 1, and with the movably assembly of piece of ventilating on base 4, utilize fixed unit to fix the position of battery 6 on bottom plate 1 in advance, readjust base 4 makes the piece of ventilating just to suppressing hole 600, later operation piece of ventilating removes to suppress hole 600 with the butt, form the cavity of battery 6 and the intercommunication between the device of suppressing, can satisfy the test requirement of suppressing of different size specification batteries 6, the convenient assembly operation of suppressing the gas circuit intercommunication of completion, in order to carry out subsequent test of suppressing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. An auxiliary tool for a battery cavity body pressing test comprises a bottom plate (1) for bearing a battery (6) and a fixing unit for fixing the battery (6) on the bottom plate (1); the method is characterized in that:

the auxiliary tool further comprises a base (4) which is arranged on the bottom plate (1) and is adjustable in position, and an air ventilation piece arranged on the base (4);

along with the position adjustment of the base (4), the ventilation piece can be over against the pressing hole (600) on the battery (6);

the vent piece can move towards the pressing hole (600) and abut against the pressing hole (600) so as to form communication between a cavity inside the battery (6) and a pressing device.

2. The auxiliary tool for the battery cavity pressing test of claim 1, wherein:

the fixing unit comprises a top plate (102) fixedly arranged above the bottom plate (1), a pressing plate (107) capable of moving between the bottom plate (1) and the top plate (102) in an up-and-down guiding manner, and a driving mechanism capable of driving the pressing plate (107) to move;

the driving mechanism is operated to drive the pressure plate (107) to move downwards so as to press the battery (6) on the bottom plate (1).

3. The auxiliary tool for the battery cavity pressing test according to claim 2, characterized in that:

the driving mechanism comprises a lead screw (21) which is rotatably arranged on the top plate (102) and a sleeve (22) which is fixedly connected to the pressure plate (107);

the screw rod (21) is connected with the sleeve (22) in a threaded manner, and the sleeve (22) moves up and down relative to the top plate (102) along with the rotation of the screw rod (21) so as to drive the pressing plate (107) to move.

4. The auxiliary tool for the battery cavity pressing test according to claim 3, characterized in that:

a nut (220) is fixedly installed at the top of the sleeve (22), and the lead screw (21) is screwed on the nut (220);

and a blocking piece (210) for preventing the screw rod (21) from being separated from the screw cap (220) is fixedly arranged at the bottom of the screw rod (21).

5. The auxiliary tool for the battery cavity pressing test according to claim 3, characterized in that:

the top of the lead screw (21) is provided with a hand wheel (20).

6. The auxiliary tool for the battery cavity pressing test according to claim 2, characterized in that:

a guide post (103) is arranged between the bottom plate (1) and the top plate (102), and a connecting plate (105) capable of moving in a guiding way is arranged on the guide post (103);

the pressing plate (107) is fixedly arranged at the bottom of the connecting plate (105), and the driving mechanism is connected to the top of the connecting plate (105).

7. The auxiliary tool for the battery cavity body pressing test according to any one of claims 1 to 6, wherein:

the battery positioning device is characterized in that a rear positioning block (500) and/or a side positioning block (501) used for positioning the battery (6) placing position is arranged on the bottom plate (1), and the position of the rear positioning block (500) and/or the side positioning block (501) is adjustable.

8. The auxiliary tool for the battery cavity pressing test according to claim 7, characterized in that:

a fixing hole (400) is formed in the base (4), and a plurality of groups of first threaded holes (100) are distributed in the bottom plate (1);

the base (4) is fastened on a group of the first threaded holes (100) through fasteners (5) penetrating through the fixing holes (400);

an adjusting block (42) with an adjustable upper position and a lower position is arranged on the base (4), and the ventilation piece is arranged on the adjusting block (42).

9. The auxiliary tool for the battery cavity pressing test according to claim 8, characterized in that:

the ventilation piece comprises a ventilation rod (30) with an external thread, and a threaded hole (421) is formed in the adjusting block (42);

the ventilation rod (30) is screwed in the screwing hole (421), and the ventilation rod (30) can be rotated to approach or depart from the pressing hole (600).

10. The auxiliary tool for the battery cavity pressing test according to claim 9, characterized in that:

the ventilation rod (30) is provided with a sealing ring (31) at the butt joint end (300) which is used for being abutted against the pressing hole (600);

and the other end of the ventilation rod (30) opposite to the butt joint end (300) is provided with a quick connection-peg (32).

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