Equipment for testing assembly tightness of battery cell shell and cover plate

Abstract

The utility model discloses a device for testing the assembling tightness of a battery cell shell and a cover plate, and relates to the technical field of battery production and manufacturing. Comprising a clamp mechanism, a grabbing mechanism, a driving mechanism and a force sensor, the clamp mechanism is used for clamping and fixing a battery cell shell, the grabbing mechanism is used for grabbing a cover plate, the grabbing mechanism is arranged at the output end of the driving mechanism, and the driving mechanism is used for driving the grabbing mechanism to move in the direction deviating from or facing the clamp mechanism; the grabbing mechanism is driven by the driving mechanism to pull a cover plate which is grabbed by the grabbing mechanism and installed on the battery cell shell so as to test the assembling tightness degree between the battery cell shell and the cover plate, and the force sensor is used for measuring the pulling force value when the grabbing mechanism pulls the cover plate. According to the equipment for testing the assembly tightness between the battery cell shell and the cover plate, the cover plate is pulled by adopting a mechanical structure, and the tension value is accurately measured through the force sensor, so that the assembly tightness between the battery cell shell and the cover plate is tested.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and manufacturing, in particular to a device for testing the assembly tightness of a battery cell shell and a cover plate. Background Art

[0002] The assembly tightness of the cell shell and the cover is related to the welding production quality of the cell cover. If the fit is too loose, the cover will easily fall into the shell, increasing the welding gap and affecting the welding flatness; if the fit is too tight, it will be difficult to assemble into place.

[0003] Currently, the method for testing the assembly tightness between the battery cell shell and the cover plate is to manually pull the cover plate, and judge the assembly tightness between the battery cell shell and the cover plate based on the amount of force applied when pulling the cover plate. However, this manual testing method is greatly affected by the subjective influence of the tester, the test results are not accurate, and there is no relatively standardized evaluation standard. Moreover, when the force is applied manually, the size and direction of the force are unstable, which may easily damage the battery cell shell and / or the end cover structure, affecting the battery cell assembly. Utility Model Content

[0004] The utility model provides a device for testing the assembly tightness of a battery cell shell and a cover plate, which adopts a clamp mechanism to clamp and fix the battery cell shell, a gripping mechanism to grip the cover plate, and a driving mechanism to drive the gripping mechanism to pull the cover plate, so as to realize a mechanical cover plate pulling operation, and uses a force sensor to accurately measure the pulling force value of the gripping mechanism in the whole process of pulling the cover plate, thereby testing the assembly tightness between the battery cell shell and the cover plate, so as to solve the above-mentioned technical problems.

[0005] The technical solution of the utility model for solving the above-mentioned problem is: to provide a device for testing the assembly tightness of the battery cell shell and the cover plate, including a clamping mechanism, a gripping mechanism, a driving mechanism, and a force sensor, the clamping mechanism is used to clamp and fix the battery cell shell, the gripping mechanism is used to grip the cover plate, the gripping mechanism is arranged at the output end of the driving mechanism, and the driving mechanism is used to drive the gripping mechanism to move in a direction away from or toward the clamping mechanism; the gripping mechanism, driven by the driving mechanism, pulls the cover plate gripped by it and installed on the battery cell shell to test the assembly tightness between the battery cell shell and the cover plate, and the force sensor is used to measure the pulling force value when the gripping mechanism pulls the cover plate.

[0006] Furthermore, it also includes a device base and a mounting support arranged above the device base, the clamping mechanism is installed on the device base, the driving mechanism is arranged on the mounting support, and the direction of the gripping mechanism away from or toward the clamping mechanism is the vertical direction.

[0007] Furthermore, the clamping mechanism includes a first clamping plate and a second clamping plate, the lower ends of the first clamping plate and the second clamping plate are fixed on the equipment base, the first clamping plate and the second clamping plate are arranged opposite to each other, and the area between the first clamping plate and the second clamping plate is a clamping interval for clamping and fixing the battery cell shell.

[0008] Furthermore, a plurality of screw holes are provided on the base of the device, and screw connectors are provided at the lower ends of the first clamping plate and the second clamping plate. The first clamping plate and the second clamping plate are respectively fixedly installed at the screw holes at different positions of the base of the device through the screw connectors to adjust the size of the clamping interval, thereby making the clamping mechanism adaptable to clamping battery cell shells of different models and sizes.

[0009] Furthermore, a limiting groove is provided on the base of the equipment, and multiple screw holes are provided in the limiting groove. The lower ends of the first splint and the second splint are provided with limiting bosses, and the screw connection is provided at the position of the limiting bosses; when the first splint is fixed to the screw hole on the base of the equipment through the screw connection, the limiting boss at the lower end of the first splint also extends into the limiting groove, and the limiting boss and the limiting groove also cooperate with each other to limit the direction of the first splint, and when the second splint is fixed to the screw hole on the base of the equipment through the screw connection, the limiting boss at the lower end of the second splint also extends into the limiting groove, and the limiting boss and the limiting groove also cooperate with each other to limit the direction of the second splint, so that the first splint and the second splint remain parallel to each other.

[0010] Furthermore, the limiting groove is a strip-shaped groove, and there is at least one, and each limiting groove is evenly spaced with multiple screw holes. When the number of limiting grooves is greater than or equal to two, at least two limiting grooves are parallel to each other; the first splint and the second splint are each provided with at least one limiting boss. When only one limiting boss of the first splint extends into the limiting groove, the limiting boss is a strip-shaped boss adapted to the limiting groove. When only one limiting boss of the second splint extends into the limiting groove, the limiting boss is also a strip-shaped boss adapted to the limiting groove.

[0011] Furthermore, the gripping mechanism includes a gripping bracket and at least one suction cup for gripping the cover plate by sucking the cover plate. A strip channel is provided on the gripping bracket, and a mounting bolt is provided on the back of each suction cup. The suction cup is installed on the gripping bracket by passing the mounting bolt through the strip channel and limiting the position of the nut end of the mounting bolt with the nut to clamp the gripping bracket.

[0012] Furthermore, the mounting support includes a first platform supported on the equipment base and a second platform supported on the first platform; the driving mechanism includes a driving motor, a screw rod, a screw rod nut, an upper driving base, and a lower driving base. The driving motor is installed on the second platform and is arranged vertically downward. The screw rod is coaxially fixedly connected to the output rotating shaft of the driving motor. The lower end of the screw rod is also rotatably connected to the first platform. The screw rod nut is cooperatedly arranged on the screw rod, and the screw rod nut is also fixedly arranged on the upper driving base. The upper driving base and the lower driving base are connected to each other through a guide rod, and the guide rod is axially movably inserted on the first platform. The upper driving base and the lower driving base are respectively located above and below the first platform. The force sensor is fixedly installed on the bottom of the lower driving base, and the force sensor is also fixedly connected to the gripping mechanism.

[0013] Furthermore, the screw nut is rotatably arranged at the center position of the upper driving base.

[0014] Furthermore, the force sensor is also fixedly mounted at the center of the bottom of the lower driving base.

[0015] Furthermore, a plurality of guide rods are provided, and the plurality of guide rods are evenly distributed around the lead screw nut.

[0016] Furthermore, a through hole for the guide rod to be inserted is provided on the first platform, and a sliding guide sleeve is provided in the through hole to facilitate the axial movement of the guide rod.

[0017] Furthermore, a control button for controlling the start and stop status of the drive motor is provided on the side of the base of the equipment. The control button includes a start button and an emergency stop button.

[0018] Furthermore, a socket is provided on the side of the device base, and the socket is connected to the drive motor circuit.

[0019] Furthermore, a plurality of heat dissipation holes are provided on the base of the device.

[0020] Furthermore, a protective shell is provided above the base of the device, and the clamp mechanism, gripping mechanism, driving mechanism, and mounting support are all located inside the protective shell.

[0021] Furthermore, an opening is provided on one side of the protective shell, and the battery cell shell and cover plate to be tested enter and exit the protective shell through the opening.

[0022] Furthermore, the protective shell is also provided with a display screen for displaying detection data of the force sensor.

[0023] Beneficial effects of the utility model:

[0024] A specific embodiment of the present utility model is a device for testing the assembly tightness of a battery cell shell and a cover plate. The device clamps the battery cell shell from both sides, and the gripping mechanism sucks and grips the cover plate from above through a suction cup. The driving mechanism is then operated to drive the gripping mechanism to move upward stably, thereby causing the gripping mechanism to pull the cover plate upward. A force sensor is used to detect the pulling force value applied to the cover plate by the gripping mechanism, so as to clearly determine the assembly tightness between the surface battery cell shell and the cover plate through the magnitude of the pulling force value, thereby reducing the influence of subjective factors on the test results.

[0025] In addition, the relative movement of the first and second clamping plates allows for clamping of battery cell casings of varying sizes. Furthermore, the positioning bosses and recesses cooperate to maintain position, keeping the first and second clamping plates parallel to each other, ensuring they can properly clamp the battery cell casing and preventing tilting of the clamping plates, which could result in a gap between them and the cell casing.

[0026] In addition, the suction cup can move on the gripping bracket, and the screw nut is also installed and connected to the gripping mechanism through the upper drive base, guide rod, and lower drive base, so that when the cover is pulled upward by the gripping mechanism, its pulling center can overlap with the geometric center of the cover, and the pulling direction is also limited to vertically upward, thereby effectively preventing the cover from being pulled and damaged due to the inclination of the pulling force. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0028] Figure 1 This is an overall structural diagram of the device for testing the assembly tightness of the battery cell housing and the end cover of this embodiment;

[0029] Figure 2 This is a diagram of the internal structure of the device for testing the assembly tightness of the battery cell housing and the end cover of this embodiment;

[0030] Figure 3 This is a rear structural diagram of the device for testing the assembly tightness of a battery cell housing and an end cover according to this embodiment;

[0031] Figure 4 This is a top view of the device base of this embodiment;

[0032] Figure 5 is a structural diagram of the clamp mechanism of this embodiment;

[0033] Figure 6 is a structural diagram of the gripping mechanism of this embodiment;

[0034] Figure 7 2 is a top view of the first platform of this embodiment;

[0035] 1-clamp mechanism, 11-first clamping plate, 12-second clamping plate, 13-screw connection, 14-screw hole, 15-limiting groove, 16-limiting boss, 2-gripping mechanism, 21-gripping bracket, 22-suction cup, 23-strip channel, 24-mounting bolt, 3-driving mechanism, 31-driving motor, 32-screw, 33-screw nut, 34-upper driving base, 35-lower driving base, 36-guide rod, 37-sliding guide sleeve, 4-equipment base, 41-start button, 42-emergency stop button, 43-socket, 44-heat dissipation hole, 45-protective shell, 46-opening, 47-display screen, 5-mounting support, 51-first platform, 52-second platform, 6-force sensor;

[0036] 7-battery cell housing, 8-cover. DETAILED DESCRIPTION

[0037] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0038] See also Figure 2 , a specific embodiment of the utility model is a device for testing the assembly tightness of a battery cell shell and a cover plate, comprising a clamp mechanism 1, a gripping mechanism 2, a driving mechanism 3, a device base 4, and a mounting bracket. The clamp mechanism 1 is arranged on the device base 4, the mounting bracket is arranged above the device base 4, the driving mechanism 3 is arranged on the mounting bracket, the clamp mechanism 1 is used to clamp and fix the battery cell shell 7, the gripping mechanism 2 is used to grip the cover plate 8, the gripping mechanism 2 is arranged at the output end of the driving mechanism 3, and the driving mechanism 3 is used to drive the gripping mechanism 2 to move in a direction away from or close to the clamp mechanism 1; the gripping mechanism 2 is driven by the driving mechanism 3 to pull the cover plate 8 gripped by it and installed on the battery cell shell 7 to test the assembly tightness between the battery cell shell 7 and the cover plate 8, and the force sensor 6 is used to measure the pulling force value when the gripping mechanism 2 pulls the cover plate 8.

[0039] Specifically, in this embodiment, the device base 4 is a box with a cavity, and support columns are vertically fixed at the four corners of the upper end surface of the device base 4. The top ends of the four support columns are fixedly connected to the mounting bracket at the same time. The mounting bracket includes a first platform 51 and a second platform 52. The first platform 51 is fixed at the top ends of the four support columns, and the second platform 52 is arranged above the first platform 51 through two support plates; in this regard, the clamping mechanism 1 is installed at the upper end surface of the device base 4, the driving mechanism 3 is installed on the second platform 52 and its power output end extends to the bottom of the first platform 51, and the gripping mechanism 2 is located below the first platform 51 and is connected to the power output end of the driving mechanism 3.

[0040] Furthermore, in this embodiment, the driving mechanism 3 includes a driving motor 31, a screw rod 32, a screw nut 33, an upper driving base 34, a lower driving base 35, and a guide rod 36. The driving motor 31 is vertically downwardly installed on the second platform 52, and the output rotating shaft of the driving motor 31 also passes downward through the second platform 52 and is coaxially fixedly connected to the screw rod 32. The lower end of the screw rod 32 is rotatably connected to the first platform 51, and the screw nut 33 is threadedly set on the screw rod 32 and is also fixedly installed on the upper driving base 34. The four guide rods 36 are all axially movably plugged into the first platform 51, and the upper ends of the four guide rods 36 are all fixedly connected to the upper driving base 34, and the lower ends are all fixedly connected to the lower driving base 35. The force sensor 6 is fixedly installed at the center position of the bottom surface of the lower driving base 35, and the gripping mechanism 2 is fixedly installed at the lower end of the force sensor 6.

[0041] In this regard, when the drive motor 31 is working, the screw nut 33 moves vertically up and down correspondingly under the rotation drive of the screw 32. When the screw nut 33 moves vertically, it drives the lower drive base 35 to move up and down through the upper drive base 34 and the guide rod 36, and then drives the gripping mechanism 2 to move vertically up and down.

[0042] In this embodiment, the direction in which the gripping mechanism 2 moves away from or toward the battery cell housing 7 is the vertical direction. Therefore, when the gripping mechanism 2 grips the cover plate 8 at the upper end surface of the battery cell housing 7 and moves vertically upward, the cover plate 8 can be pulled to check the assembly tightness between the cover plate 8 and the battery cell housing 7.

[0043] For further information, see Figure 7 The four sockets of the first platform 51 are all provided with sliding guide sleeves 37 made of soft rubber material. The aperture of the sliding guide sleeve 37 is equivalent to the diameter of the guide rod 36 or 0.5 mm larger than the diameter of the guide rod 36, and the hole wall of the sliding guide sleeve 37 is smooth. The outer circumferential surface of the guide rod 36 is also set to a smooth curved surface, so that the guide rod 36 can slide smoothly at the socket, so that the driving mechanism 3 can drive and control the lifting and lowering movement of the grasping mechanism 2.

[0044] It should be noted that: in this embodiment, in order to ensure that when the gripping mechanism 2 pulls the cover 8, the pulling direction is vertically upward, the four guide rods 36 are evenly arranged around the screw nut 33, and the screw nut 33 is also fixedly set at the geometric center position of the upper drive base 34. The force sensor 6 is installed at the bottom geometric center position of the lower drive base 35, and the force sensor 6 is also fixedly connected to the geometric center position of the gripping mechanism 2.

[0045] Furthermore, in other embodiments, the number of guide rods 36 and support columns is not limited to four.

[0046] Further, please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 The clamping mechanism 1 includes a first clamping plate 11 and a second clamping plate 12. The first clamping plate 11 and the second clamping plate 12 are both L-shaped plates. The first clamping plate 11 and the second clamping plate 12 are arranged opposite to each other. The area between the first clamping plate 11 and the second clamping plate 12 is a clamping interval for clamping and fixing the battery cell shell 7.

[0047] In addition, Figure 4 Taking the orientation shown in as an example, the equipment base 4 is provided with two limiting grooves 15 extending in the left and right directions and having a long strip structure. The two limiting grooves 15 are parallel to each other, and a plurality of screw holes 14 are provided in the two limiting grooves 15, and the multiple screw holes 14 in the limiting grooves 15 are also divided into two groups of symmetrical arrangements, and the four groups of screw holes 14 are equidistantly arranged; the first plywood 11 and the second plywood 12 are each provided with two screw connectors 13, and the two screw connectors 13 on the first plywood 11 are respectively threadedly connected with the screw holes 14 on the left sides of the two limiting grooves 15 to fix the first plywood 11 to the left side of the base, and the two screw connectors 13 on the second plywood 12 are respectively connected with the screw holes 14 on the right sides of the two limiting grooves 15 to fix the second plywood 12 to the right side of the base, so that the first plywood 11 and the second plywood 12 cooperate with each other to clamp the battery cell shell 7.

[0048] Moreover, when facing battery cell shells 7 of different sizes and models, the screw connector 13 on the first clamping plate 11 can be screwed into the screw holes 14 at different positions on the left side of the limiting groove 15, and the screw connector 13 on the second clamping plate 12 can also be screwed into the screw holes 14 at different positions on the right side of the limiting groove 15, so that the width of the clamping area between the first clamping plate 11 and the second clamping plate 12 can be adaptively adjusted according to the actual size of the battery cell shell 7.

[0049] Further, see Figure 5The two limiting bosses 16 are respectively provided at the bottom ends of the first clamping plate 11 and the second clamping plate 12, and the two limiting bosses 16 of the first clamping plate 11 each extend into a limiting groove 15, and the two limiting bosses 16 of the second clamping plate 12 also each extend into a limiting groove 15, and the width of the limiting bosses 16 is equivalent to the width of the limiting groove 15, and the two limiting bosses 16 are both limited by the corresponding limiting grooves 15, so that the installation direction of the first clamping plate 11 is consistent with the extension direction of the limiting groove 15; the other two limiting bosses 16 also cooperate with the corresponding limiting grooves 15 to limit, so that the installation direction of the second clamping plate 12 is also consistent with the extension direction of the limiting groove 15, thereby making the first clamping plate 11 and the second clamping plate 12 always able to maintain a parallel state with each other at different positions, so as to ensure that the first clamping plate 11 and the second clamping plate 12 can both contact the side wall of the battery cell shell 7 to the greatest extent, thereby ensuring the clamping and fixing effect of the clamp mechanism 1.

[0050] It should be noted that in other embodiments, the limiting boss 16 may be provided as a single strip-shaped boss having a width comparable to that of the limiting groove 15, or may be provided as two boss structures not limited to a specific shape but extending into the two limiting grooves 15, or may be provided as a plurality of boss structures, but at least two boss structures not limited to a specific shape but extending into the two limiting grooves 15. Furthermore, depending on the specific number and shape of the limiting bosses, the number of limiting grooves 15 may also be one strip-shaped groove, or three or even more.

[0051] Further, see Figure 1 、 Figure 2 、 Figure 6 The gripping mechanism 2 includes a gripping bracket 21, a suction cup 22, and a mounting bolt 24. The gripping bracket 21 is a long strip-shaped bracket with a strip-shaped channel 23 in the middle. Four mounting bolts 24 are movably inserted into the strip-shaped channel 23. The nuts of the mounting bolts 24 are located at the top. The four mounting bolts 24 are each provided with a nut, which is located on both sides of the gripping bracket 21. The suction cup 22 is a mechanical suction cup, which is fixed at the bottom of the mounting bolt 24. To this end, technicians can adjust the position of the four suction cups 22 on the gripping bracket 21 by moving the mounting bolts 24, and can also make the nuts cooperate with the nuts to clamp the gripping bracket 21, thereby fixing the specific position of the suction cups 22. This allows the gripping mechanism 2 to adapt to cover plates 8 of different sizes and models. When the cover plate 8 is gripped and pulled, the suction cups 22 will not move at will.

[0052] It should be noted that, in other embodiments, the number of the suction cups 22 may be one, two, three or even more, and the suction cups 22 may also be configured as electric suction cups.

[0053] Further, see Figure 1 、 Figure 3 ,by Figure 1 Taking the illustrated position as an example, the device base 4 is a box-shaped structure with a cavity. A slope is provided on the right front of the device base 4. Two start buttons 41 for starting the drive motor 31 and an emergency stop button 42 for stopping the drive motor 31 are provided on the slope. Both the start button 41 and the emergency stop button 42 are connected to the power supply circuit for the drive motor 31. Furthermore, a socket 43 connected to the circuit for the drive motor 31 is provided on the left rear side of the device base 4. The drive motor 31 receives an external power supply via the socket 43.

[0054] In addition, a plurality of strip-shaped heat dissipation holes 44 are provided on the left front side wall and the right rear side wall of the device base 4 .

[0055] In addition, a protective shell 45 is provided above the base 4 of the equipment, and the protective shell 45 covers the clamp mechanism 1, the gripping mechanism 2, the driving mechanism 3, and the mounting support 5. An opening 46 is also provided at the lower right front side of the protective shell 45. The battery cell shell 7 can enter the protective shell 45 from the opening 46 and be clamped and fixed by the clamp mechanism 1. The tested battery cell shell 7 can also be taken out from the opening 46; a display screen 47 is also provided at the upper right front side of the protective shell 45. The display screen 47 circuit is connected to the force sensor 6 and is used to display the measurement data of the force sensor 6.

[0056] Any matters not mentioned above are applicable to the prior art.

[0057] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A device for testing the tightness of the assembly of a cell housing and a cover, characterized in that: The invention comprises a clamping mechanism (1), a gripping mechanism (2), a driving mechanism (3), and a force sensor (6). The clamping mechanism (1) is used to clamp and fix the battery cell housing (7), the gripping mechanism (2) is used to grip the cover plate (8), the gripping mechanism (2) is arranged at the output end of the driving mechanism (3), and the driving mechanism (3) is used to drive the gripping mechanism (2) to move in a direction away from or toward the clamping mechanism (1); the gripping mechanism (2) pulls the cover plate (8) gripped by it and installed on the battery cell housing (7) under the drive of the driving mechanism (3) to test the assembly tightness between the battery cell housing (7) and the cover plate (8), and the force sensor (6) is used to measure the pulling force value when the gripping mechanism (2) pulls the cover plate (8).

2. The device for testing the assembly tightness of a cell housing and a cover plate according to claim 1, wherein: It also includes a device base (4) and a mounting support (5) arranged above the device base (4), the clamping mechanism (1) is mounted on the device base (4), the driving mechanism (3) is arranged on the mounting support (5), and the direction of the gripping mechanism (2) away from or toward the clamping mechanism (1) is the vertical direction.

3. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 2, characterized in that: The clamp mechanism (1) comprises a first clamping plate (11) and a second clamping plate (12), the lower ends of the first clamping plate (11) and the second clamping plate (12) are fixed on the device base (4), the first clamping plate (11) and the second clamping plate (12) are arranged relative to each other, and the area between the first clamping plate (11) and the second clamping plate (12) is a clamping interval for clamping and fixing the battery cell housing (7).

4. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 3, characterized in that: A plurality of screw holes (14) are provided on the device base (4), and screw connections (13) are provided at the lower ends of the first clamping plate (11) and the second clamping plate (12). The first clamping plate (11) and the second clamping plate (12) are respectively fixedly mounted at screw holes (14) at different positions of the device base (4) through the screw connections (13) to adjust the size of the clamping interval, thereby enabling the clamping mechanism (1) to adapt to clamping battery cell shells (7) of different models and sizes.

5. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 4, characterized in that: The device base (4) is provided with a limiting groove (15), and a plurality of screw holes (14) are provided in the limiting groove (15). The lower ends of the first clamping plate (11) and the second clamping plate (12) are provided with limiting bosses (16), and the screw connection member (13) is provided at the position where the limiting bosses (16) are located; when the first clamping plate (11) is fixed to the screw holes (14) on the device base (4) through the screw connection member (13), the limiting bosses (16) at the lower end of the first clamping plate (11) also extend into the limiting groove (15). The limiting boss (16) and the limiting groove (15) also cooperate with each other to limit the direction of the first clamping plate (11). When the second clamping plate (12) is fixed to the screw hole (14) on the equipment base (4) through the screw connector (13), the limiting boss (16) at the lower end of the second clamping plate (12) also extends into the limiting groove (15). The limiting boss (16) and the limiting groove (15) also cooperate with each other to limit the direction of the second clamping plate (12), so that the first clamping plate (11) and the second clamping plate (12) remain parallel to each other.

6. The device for testing the tightness of the assembly of a battery cell housing and a cover plate according to claim 5, characterized in that: The limiting groove (15) is a strip-shaped groove, and is provided with at least one, and each limiting groove (15) is provided with a plurality of screw holes (14) at equal intervals. When the number of the limiting grooves (15) is greater than or equal to two, at least two limiting grooves (15) are parallel to each other. The first clamping plate (11) and the second clamping plate (12) are each provided with at least one limiting boss (16). When only one limiting boss (16) of the first clamping plate (11) extends into the limiting groove (15), the limiting boss (16) is a strip-shaped boss adapted to the limiting groove (15). When only one limiting boss (16) of the second clamping plate (12) extends into the limiting groove (15), the limiting boss (16) is also a strip-shaped boss adapted to the limiting groove (15).

7. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 1, characterized in that: The gripping mechanism (2) comprises a gripping bracket (21), at least one suction cup (22) for gripping the cover plate (8) by sucking the cover plate (8), a strip channel (23) is provided on the gripping bracket (21), and a mounting bolt (24) is provided on the back of each suction cup (22), and the suction cup (22) is mounted on the gripping bracket (21) by passing the mounting bolt (24) through the strip channel (23) and by limiting the nut end of the mounting bolt (24) with the nut to clamp the gripping bracket (21).

8. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 1, wherein: The mounting support (5) includes a first platform (51) supported on the equipment base (4) and a second platform (52) supported on the first platform (51); the driving mechanism (3) includes a driving motor (31), a screw (32), a screw nut (33), an upper driving base (34), and a lower driving base (35); the driving motor (31) is mounted on the second platform (52), and the driving motor (31) is vertically downwardly arranged; the screw (32) is coaxially fixedly connected to the output rotating shaft of the driving motor (31); the screw (32) is The lower end is also rotatably connected to the first platform (51), the screw nut (33) is cooperatively arranged on the screw (32), and the screw nut (33) is also fixedly arranged on the upper drive base (34). The upper drive base and the lower drive base are connected to each other through a guide rod (36), and the guide rod (36) is axially movably inserted on the first platform (51). The upper drive base and the lower drive base are respectively located above and below the first platform (51). The force sensor (6) is fixedly installed on the bottom of the lower drive base, and the force sensor (6) is also fixedly connected to the gripping mechanism (2).

9. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 8, characterized in that: The screw nut (33) is rotatably arranged at the center position of the upper drive base (34); the force sensor (6) is also fixedly installed at the center position of the bottom of the lower drive base; a plurality of guide rods (36) are provided, and the plurality of guide rods (36) are evenly distributed around the screw nut (33).

10. The device for testing the assembly tightness of a battery cell housing and a cover plate according to claim 9, characterized in that: A through hole for the guide rod (36) to be inserted is provided on the first platform (51), and a sliding guide sleeve (37) is provided in the through hole to facilitate the axial movement of the guide rod (36).

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