Clamping jaw suitable for square lithium battery

Abstract

The clamping jaw comprises a mounting base, air cylinders are symmetrically arranged on the two sides of the mounting base, the clamping jaw comprises a main body and a driving block, and clamping mechanisms are symmetrically arranged on the driving block. And the clamping mechanism is provided with a clamping plate which is vertical to the lower side of the driving block, is close to the battery side embedded movable plate and can translate vertically to the clamping plate. Multiple pairs of rotating blocks are symmetrically arranged on the two sides of the clamping plate, one end is hinged to the side face of the clamping plate, the rotating face is perpendicular to and parallel to related directions, the other end is connected with the clamping rod, and the axis is perpendicular to the rotating face. The movable plate is linked with the rotating blocks through the transmission mechanism, when the movable plate is pressed to move towards the clamping plate, the transmission mechanism enables the rotating blocks to rotate oppositely, and the clamping rod locks the side face of the battery. A reset mechanism is arranged between the movable plate and the clamping plate, when the battery is far away, the reset mechanism enables the movable plate to be far away, the rotating block rotates back to back, and locking is relieved. According to the clamping jaw, the clamping mechanism is driven through the air cylinder, the side face of a battery is effectively clamped and loosened through cooperation of the movable plate and the rotating block, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The invention relates to the field of lithium batteries, and in particular to a clamp suitable for square lithium batteries. Background Art

[0002] The square lithium battery is one of the important types in the current lithium-ion battery field. It uses metal materials (such as aluminum alloy, stainless steel) as the shell. The internal structure is basically the same as that of liquid lithium-ion batteries, consisting of positive electrode, negative electrode, diaphragm and electrolyte. Its core feature is that the regular rectangular or square shell design optimizes the space utilization rate, and the energy density can reach more than 200Wh / kg, which is significantly higher than some cylindrical batteries. This type of battery has high structural strength and strong resistance to extrusion and vibration. With the safety design such as the explosion-proof valve pre-installed on the shell surface, it can effectively reduce the risk of thermal runaway. Therefore, it occupies a dominant position in the field of new energy vehicle power batteries.

[0003] Compared with soft-pack batteries and cylindrical batteries, square lithium batteries can reduce space waste by stacking when used in groups, making it easier to achieve module standardization. With the application of CTP (module-free) technology, the system energy density is increased by 15%-20%. However, the size specifications of different manufacturers vary greatly, resulting in limited market choices and high subsequent maintenance costs. It is currently mainly used in high-end products such as BYD Blade Battery and CATL Kirin Battery, covering electric vehicles, energy storage systems, industrial equipment and other fields. With the continuous improvement of welding technology and heat dissipation structure, square batteries are moving towards higher charging and discharging efficiency (such as 4C fast charging) and longer cycle life.

[0004] In the production process of square lithium batteries, their transportation on the production line usually relies on mechanical arms and grippers. For example, a square lithium gripper device is mentioned in the Chinese patent with application number CN202410981325.6, which includes a gripper fixing plate, the left and right ends of which are connected to the lifting guide rail bottom plate, and the lifting guide rail bottom plate is connected to the slider connecting plate through the lifting guide rail; the bottom of the slider connecting plate is connected to the cylinder mounting plate embedded in the slider connecting plate through a guide shaft; the bottom of the slider connecting plate is connected to the gripper sub-rail through a linear guide rail, and the bottom of the cylinder mounting plate is connected to the gripper sub-rail through a connecting block; a gripper slider is provided at the bottom of the gripper sub-rail, a buffer pressure block is provided on the inner side of the gripper slider, and a battery gripper is provided on the outer side; the mechanism relies on the gripper sub-rail and the linear guide rail to disperse the force exerted by the battery on the battery gripper, effectively reducing the wear on the battery gripper and the gripper cylinder itself, and improving the service life of the mechanism; at the same time, the combination of the gripper slider and the gripper sub-rail is less likely to exert excessive force on the battery, which can better protect the battery.

[0005] However, the existing technology, such as the square lithium battery clamping device mentioned in the above patent, has certain defects. Production efficiency is an important indicator that cannot be ignored in the production process. On the production line, the robotic arm drives the square lithium battery to move. During the movement, the battery generally moves longitudinally, laterally, and rotates horizontally. During the emergency stop and start of the robotic arm, the unclamped part of the square lithium battery will be skewed due to inertia. This is undoubtedly dangerous in the subsequent production process. Placing it in a skewed posture on a conveyor belt or a battery carrier may cause the battery to fall over or be squeezed and deformed. If the battery is already charged, it may cause a serious production safety accident.

[0006] Therefore, a clamping jaw suitable for square lithium batteries that can clamp in multiple directions is needed. Summary of the invention

[0007] In order to solve the problem in the prior art that the square lithium battery clamp is prone to tilt when driving the battery to move, the present invention proposes a clamp suitable for square lithium batteries, and the technical solution is as follows.

[0008] A clamping jaw suitable for a square lithium battery comprises a mounting seat, cylinders are coaxially and symmetrically arranged on both sides of the mounting seat, each cylinder comprises a main body and a driving block, a pair of the driving blocks of the cylinders are symmetrically arranged with clamping mechanisms, and when the pair of cylinders work, the driving blocks drive a pair of clamping mechanisms to move toward each other along the axial direction of the cylinders;

[0009] The clamping mechanism comprises a clamping plate vertically arranged at the lower side of the driving block, a movable plate is movably embedded in a side of the clamping plate close to the battery, the movable plate can translate in a direction perpendicular to the surface of the clamping plate, a plurality of pairs of rotating blocks are symmetrically arranged on both sides of the clamping plate, one end of the rotating block is hinged to the side of the clamping plate and the rotating surface is perpendicular to the surface of the clamping plate, the rotating surface is also parallel to the movement direction of the driving block, and the other end of the rotating block is connected to a clamping rod with an axis perpendicular to the rotating surface of the rotating block;

[0010] The movable plate is linked to the rotating block through the transmission mechanism. When the movable plate is pressed and moves toward the clamping plate, the rotating blocks on both sides of the clamping plate can be rotated toward each other through the transmission mechanism, so that the clamping rod locks the side of the battery;

[0011] A reset mechanism is arranged between the movable plate and the clamping plate. When the battery is away from the clamping plate, the reset mechanism makes the movable plate away from the clamping plate, thereby making a pair of rotating blocks rotate in opposite directions through the transmission mechanism, and releasing the clamping rod from locking the battery side.

[0012] Furthermore, a movable blind hole is provided on one side of the clamping plate close to the battery, the movable plate is coaxially movably embedded in the movable blind hole, a limiting protrusion is provided at the opening of the movable blind hole, and an anti-slip flange is provided on the edge of one end of the movable plate embedded in the movable blind hole, and the limiting protrusion cooperates with the anti-slip flange to limit the movable stroke of the movable blind hole.

[0013] Furthermore, the transmission mechanism includes tooth grooves on both sides of the movable plate, and an arc-shaped tooth portion is provided on the side of one end of the rotating block hinged to the clamping plate, and the arc-shaped tooth portion is engaged with the tooth groove. When the movable plate translates axially in the movable blind hole, the rotating block can rotate toward or away from each other through the cooperation of the arc-shaped tooth portion and the tooth groove.

[0014] Furthermore, the reset mechanism includes a plurality of guide rods arranged perpendicular to the surface of the movable plate, one end of the guide rod is fixedly connected to a surface of the movable plate located in the movable blind hole, and the other end passes through the end surface of the movable blind hole to the outside of the clamping plate, and the part of the guide rod located between the clamping plate and the movable plate is coaxially sleeved with a spring.

[0015] Furthermore, an elastic buffer layer is provided on one side of the clamping plate and the movable plate contacting the battery, and an outer wall of the clamping rod is also wrapped with an elastic buffer layer. The elastic buffer layer is made of rubber or silicone and has evenly distributed anti-slip raised patterns on the surface.

[0016] Furthermore, a plurality of movable straight rails parallel to the axis of the movable blind hole are symmetrically arranged on both sides of the movable plate, and a plurality of rows of roller holes are opened on the side walls of the movable blind hole along the movement direction of the movable plate, and rollers can be movably embedded in the roller holes. After the rollers are installed, a retaining plate is installed on the side wall, and the retaining plate is opened with an exposure opening parallel to the movable straight rail. A row of rollers is slidably clamped in a movable straight rail through the exposure opening, and when the movable plate moves, the rollers rotate in the roller holes.

[0017] Furthermore, the clamping rod body is provided with a plurality of adjustment rods perpendicular to itself and parallel to each other, the rotating block is provided with a through hole perpendicular to the axial direction of the adjustment rod, the adjustment rod can be coaxially inserted in the through hole, and a side wall of one side of the through hole is provided with a fixing screw hole that passes through the rotating block, in which a fixing bolt can be coaxially arranged, and the distance of the clamping rod relative to the rotating block can be adjusted by loosening or tightening the fixing bolt.

[0018] Furthermore, a guide rail is installed under the mounting seat, and the guide rail is a rigid linear guide rail. The extension direction of the guide rail is parallel to the movement axis of the driving block. The clamping mechanism also includes a guide connecting block arranged above the clamping plate, and a guide hole is arranged on the guide connecting block. The guide connecting block is coaxially slidably arranged on the guide rail through the guide hole, and the guide connecting block is fixedly connected to the driving block.

[0019] Furthermore, vertically upward connecting plates are provided on both sides of the guide rail, and are fixedly connected to the top surface of the mounting seat through the connecting plates.

[0020] Compared with the prior art, the present invention has the following beneficial effects: in view of the safety risks caused by the tilt, displacement and rotation of the battery due to inertia caused by the square lithium battery clamp in the prior art during emergency stop, emergency start or movement, the clamp of the present invention achieves all-round stable clamping through the following design: firstly, a two-way cylinder is used to drive the symmetrically distributed clamping mechanism to move towards each other, combined with the linkage rotating blocks on both sides of the clamping plate and the two-way lateral locking of the clamping rod, the lateral displacement of the battery is effectively limited; secondly, through the meshing tooth groove design of the movable plate and the transmission mechanism, the rotational clamping action of the clamping rod is dynamically linked with the linear displacement of the movable plate, ensuring that the clamping force is evenly transmitted to the side of the battery, suppressing longitudinal displacement and horizontal rotation; the built-in return spring and guide rod of the movable plate ensure fast and reliable unlocking when disengaging, while the elastic buffer layer and anti-slip texture enhance friction and avoid surface damage. The supplementary adjustment rod structure is adaptable to batteries of different sizes. The rigid guide rail and connecting plate work together to enhance the linearity and torsional rigidity of the clamp movement. The rollers on the side walls of the movable blind holes cooperate with the movable straight rails to significantly reduce friction and shaking, forming a multi-dimensional anti-skew constraint, thereby maintaining the stability of the battery posture during transportation, emergency stop and placement, avoiding extrusion and tipping due to tilting, and improving the safety and efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the present invention as a whole;

[0022] Figure 2 It is a partial longitudinal cross-sectional view of the present invention;

[0023] Figure 3 It is a partial horizontal schematic diagram of the present invention;

[0024] Figure 4 It is a schematic diagram of the overall horizontal direction of the present invention;

[0025] Figure 5 It is a schematic diagram of the rotating block of the present invention;

[0026] Figure 6 It is a schematic diagram of the guide rail and the guide connecting block of the present invention.

[0027] In the above drawings: mounting seat 1, cylinder 2, main body 3, driving block 4, clamping plate 5, movable plate 6, battery 7, rotating block 8, clamping rod 9, movable blind hole 10, limiting protrusion 11, anti-slip flange 12, tooth groove 13, arc-shaped tooth portion 14, guide rod 15, spring 16, elastic buffer layer 17, movable straight rail 18, roller hole 19, roller 20, retaining plate 21, exposure port 22, adjusting rod 23, through hole 24, fixing screw hole 25, fixing bolt 26, guide rail 27, guide connecting block 28. DETAILED DESCRIPTION

[0028] The present invention will be described below in conjunction with the accompanying drawings:

[0029] like Figure 4 As shown, a clamping jaw suitable for a square lithium battery comprises a mounting base 1, cylinders 2 are coaxially and symmetrically arranged on both sides of the mounting base 1, each cylinder 2 comprises a main body 3 and a driving block 4, a pair of the driving blocks 4 of the cylinders 2 are symmetrically arranged with clamping mechanisms, and when the pair of cylinders 2 work, the driving blocks 4 drive a pair of clamping mechanisms to move toward each other along the axial direction of the cylinders 2;

[0030] like Figure 1 , Figure 4 As shown, the clamping mechanism includes a clamping plate 5 vertically arranged at the lower side of the driving block 4, a movable plate 6 is movably embedded on one side of the clamping plate 5 close to the battery 7, and the movable plate 6 can translate in a direction perpendicular to the plate surface of the clamping plate 5, and a plurality of pairs of rotating blocks 8 are symmetrically arranged on both sides of the clamping plate 5, one end of the rotating block 8 is hinged to the side of the clamping plate 5 and the rotating surface is perpendicular to the plate surface of the clamping plate 5, and the rotating surface is also parallel to the movement direction of the driving block 4, and the other end of the rotating block 8 is connected to a clamping rod 9 whose axis is perpendicular to the rotating surface of the rotating block 8;

[0031] like Figure 1 , Figure 2 As shown, the movable plate 6 is linked to the rotating block 8 through the transmission mechanism. When the movable plate 6 is pressed to move toward the clamping plate 5, the rotating blocks 8 on both sides of the clamping plate 5 can be rotated toward each other through the transmission mechanism, so that the clamping rod 9 locks the side of the battery 7;

[0032] like Figure 1 , Figure 2 As shown, a reset mechanism is provided between the movable plate 6 and the clamping plate 5. When the battery 7 is away from the clamping plate 5, the reset mechanism moves the movable plate 6 away from the clamping plate 5, thereby causing a pair of rotating blocks 8 to rotate in opposite directions through a transmission mechanism, thereby releasing the lock of the clamping rod 9 on the side of the battery 7.

[0033] like Figure 1 and Figure 3 As shown, preferably, a movable blind hole 10 is opened on the side of the clamping plate 5 close to the battery 7, and the movable plate 6 is coaxially movably embedded in the movable blind hole 10. A limiting protrusion 11 is arranged at the opening of the movable blind hole 10, and an anti-slip flange 12 is arranged on the edge of one end of the movable plate 6 embedded in the movable blind hole 10. The limiting protrusion 11 cooperates with the anti-slip flange 12 to limit the movable stroke of the movable blind hole 10. The cooperation between the movable blind hole 10 and the anti-slip flange 12 realizes precise limiting of the stroke of the movable plate 6, avoids jamming or falling off caused by out-of-range movement of the movable plate 6, and ensures the reliability of the clamping and resetting process.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, preferably, the transmission mechanism includes tooth grooves 13 opened on both sides of the movable plate 6, and an arc-shaped tooth portion 14 is opened on the side of one end of the rotating block 8 hinged to the clamping plate 5, and the arc-shaped tooth portion 14 is meshed with the tooth groove 13. When the movable plate 6 translates axially in the movable blind hole 10, the rotating block 8 can rotate toward or away from each other through the cooperation of the arc-shaped tooth portion 14 and the tooth groove 13. The meshing transmission of the tooth groove 13 and the arc-shaped tooth portion 14 accurately converts the linear displacement of the movable plate 6 into the rotational movement of the rotating block 8, so that the clamping force transmission is smooth and controllable, and the mechanical hysteresis is reduced; the engagement and disengagement are natural during reverse movement, which is adapted to high-frequency clamping requirements.

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the reset mechanism includes a plurality of guide rods 15 arranged perpendicular to the surface of the movable plate 6, one end of the guide rod 15 is fixedly connected to a surface of the movable plate 6 located in the movable blind hole 10, and the other end passes through the end surface of the movable blind hole 10 to the outside of the clamping plate 5, and the part of the guide rod 15 located between the clamping plate 5 and the movable plate 6 is coaxially sleeved with a spring 16, the guide rod 15 constrains the linear motion path of the movable plate 6 to avoid the jamming of the rotating block 8 caused by the deflection; the spring 16 provides a bidirectional elastic reset force, which not only ensures flexible pre-compression during clamping, but also realizes rapid unlocking during disengagement, thereby enhancing the stability and response speed of the clamping jaws.

[0036] like Figure 2 , Figure 3 As shown, preferably, an elastic buffer layer 17 is provided on one side of the clamping plate 5 and the movable plate 6 contacting the battery 7, and the outer wall of the clamping rod 9 is also wrapped with an elastic buffer layer 17. The elastic buffer layer 17 is made of rubber or silicone material, and has evenly distributed anti-slip raised patterns on the surface. The elastic buffer layer 17 is fixed to the clamping rod 9 by bonding or vulcanization. The elastic buffer layer 17 reduces the extrusion damage on the surface of the battery 7 through the rubber or silicone material; the anti-slip raised patterns on the surface increase the friction coefficient to prevent the battery 7 from sliding due to inertia, thereby doubly ensuring the clamping safety.

[0037] like Figure 1 , Figure 2 , Figure 3As shown, preferably, a plurality of movable straight rails 18 parallel to the axis of the movable blind hole 10 are symmetrically arranged on both sides of the movable plate 6, and a plurality of rows of roller holes 19 are opened on the side wall of the movable blind hole 10 along the movement direction of the movable plate 6. Rollers 20 can be movably embedded in the roller holes 19. After the rollers 20 are installed, a retaining plate 21 is installed on the side wall. The retaining plate 21 is opened with an exposure opening 22 parallel to the movable straight rail 18. A row of rollers 20 are slidably clamped in a movable straight rail 18 through the exposure opening 22. When the movable plate 6 moves, the rollers 20 rotate in the roller holes 19 to reduce the friction between the movable plate 6 and the side wall of the movable blind hole 10. The rollers 20 form rolling friction between the movable straight rails 18 and the roller holes 19, which significantly reduces the resistance to the reciprocating motion of the movable plate 6 and improves the movement sensitivity. The retaining plate 21 limits the circumferential freedom of the rollers 20 to prevent the rollers 20 from falling off and causing the movement to be interrupted, which is suitable for long-term high-load working conditions.

[0038] like Figure 1 , Figure 2 Preferably, the clamping rod 9 is provided with a plurality of adjusting rods 23 perpendicular to itself and parallel to each other, and the rotating block 8 is provided with a through hole 24 perpendicular to the axial direction of the adjusting rod 23, and the adjusting rod 23 can be coaxially inserted in the through hole 24, and a side wall of one side of the through hole 24 is provided with a fixing screw hole 25 that passes through the rotating block 8, in which a fixing bolt 26 can be coaxially arranged, and the distance of the clamping rod 9 relative to the rotating block 8 can be adjusted by loosening and tightening the fixing bolt 26, and the threaded cooperation between the adjusting rod 23 and the through hole 24 allows the length of the clamping rod 9 to be quickly adjusted to adapt to batteries 7 of different thicknesses.

[0039] like Figure 3 , Figure 4 , Figure 6 As shown, preferably, a guide rail 27 is installed under the mounting seat 1, and the guide rail 27 is a rigid linear guide rail. The extension direction of the guide rail 27 is parallel to the movement axis of the driving block 4. The clamping mechanism also includes a guide connecting block 28 arranged above the clamping plate 5, and a guide hole is arranged on the guide connecting block 28. The guide connecting block 28 is coaxially slidably arranged on the guide rail 27 through the guide hole, and the guide connecting block 28 is fixedly connected to the driving block 4, and the rigid linear guide rail accurately guides the sliding of the guide connecting block 28.

[0040] like Figure 4 As shown, preferably, vertically upward connecting plates are provided on both sides of the guide rail 27, which are fixedly connected to the top surface of the mounting seat 1 through the connecting plates. The connecting plates evenly transfer the load borne by the guide rail 27 to the top surface of the mounting seat 1, thereby reducing the risk of deformation caused by local stress concentration on the guide rail and improving the overall structural rigidity.

[0041] It is also noted that a pair of movable plates 6 in the present invention are embedded with a beam sensor, which senses whether there is a battery 7 between the clamping plates 5, thereby determining the movement logic of the robot arm and the cylinder 2. The cylinder 2 and the beam sensor mentioned in the present invention both require additional power supplies and signal transmissions. The clamp suitable for square lithium batteries described in the present invention needs to be installed on a robot arm or other displacement device to function. The cylinder 2 can maintain the clamping force without releasing the clamp after power and air are cut off through some conventional means in the prior art, such as a pneumatic circuit one-way valve or a solenoid valve retention function.

[0042] The principle of the present invention is as follows: for the clamping action of the battery 7, the present invention drives the respective driving blocks 4 to move axially toward each other through a pair of cylinders 2, driving the symmetrically arranged clamping mechanism to move laterally toward the battery 7, and the movable plate 6 in the clamping mechanism is pressed and translated along the axial direction of the aperture of the movable blind hole 10 after contacting the battery 7, and the movable plate 6 is meshed with the arc-shaped tooth portion 14 of the rotating block 8 through the tooth grooves 13 on both sides thereof, so that the linear displacement conversion clamping rod 9 swings about the rotation axis of the hinge between the rotating block 8 and the clamping plate 5, thereby clamping the battery 7 from both sides. For the movement stability of the present invention, the elastic buffer layer 17 of the clamping plate 5 and the movable plate 6 absorbs the inertial impact, The through-beam sensor detects the presence of the battery 7, and the robot arm moves in conjunction with it. The guide rail 27 constrains the sliding path of the guide connecting block 28 to prevent the clamping mechanism from swaying. The cooperation between the roller 20 and the movable straight rail 18 reduces the sliding friction between the movable plate 6 and the side wall of the movable blind hole 10, ensuring smooth clamping action. For the release action of the present invention, when the robot arm puts the battery 7 in place, the cylinder 2 drives the driving block 4 to separate in the reverse direction, which eliminates the pressure of the battery 7 on the movable plate 6. The spring 16 of the reset mechanism pushes the movable plate 6 to reset. The movable plate 6 drives the rotating block 8 to rotate backward through the tooth groove 13, and the clamping rod 9 disengages from the side of the battery 7 to achieve unlocking.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A clamp suitable for square lithium batteries, characterized in that: The invention comprises a mounting seat (1), cylinders (2) are coaxially symmetrically arranged on both sides of the mounting seat (1), each cylinder (2) comprises a main body (3) and a driving block (4), a pair of the driving blocks (4) of the cylinders (2) are symmetrically arranged with clamping mechanisms, and when the pair of cylinders (2) are in operation, the driving blocks (4) drive the pair of clamping mechanisms to move toward each other along the axial direction of the cylinders (2); The clamping mechanism comprises a clamping plate (5) vertically arranged at the lower side of the driving block (4); a movable plate (6) is movably embedded on a side of the clamping plate (5) close to the battery (7); the movable plate (6) can translate in a direction perpendicular to the plate surface of the clamping plate (5); a plurality of pairs of rotating blocks (8) are symmetrically arranged on both sides of the clamping plate (5); one end of the rotating block (8) is hinged to the side surface of the clamping plate (5) and the rotating surface is perpendicular to the plate surface of the clamping plate (5); the rotating surface is also parallel to the movement direction of the driving block (4); the other end of the rotating block (8) is connected to a clamping rod (9) whose axis is perpendicular to the rotating surface of the rotating block (8); The movable plate (6) is linked to the rotating block (8) via a transmission mechanism. When the movable plate (6) is pressed and moves toward the clamping plate (5), the rotating blocks (8) on both sides of the clamping plate (5) can be rotated toward each other through the transmission mechanism, so that the clamping rod (9) locks the side of the battery (7); A reset mechanism is provided between the movable plate (6) and the clamping plate (5). When the battery (7) is away from the clamping plate (5), the reset mechanism causes the movable plate (6) to be away from the clamping plate (5), thereby causing a pair of rotating blocks (8) to rotate in opposite directions through a transmission mechanism, thereby releasing the locking of the clamping rod (9) on the side of the battery (7).

2. A clamp suitable for a square lithium battery according to claim 1, characterized in that: A movable blind hole (10) is provided on the side of the clamping plate (5) close to the battery (7); the movable plate (6) is coaxially movably embedded in the movable blind hole (10); a limiting protrusion (11) is provided at the opening of the movable blind hole (10); an anti-slip flange (12) is provided at the edge of one end of the movable plate (6) embedded in the movable blind hole (10); the limiting protrusion (11) cooperates with the anti-slip flange (12) to limit the movable travel of the movable blind hole (10).

3. A clamp suitable for a square lithium battery according to claim 2, characterized in that: The transmission mechanism comprises tooth grooves (13) provided on both sides of the movable plate (6); an arc-shaped tooth portion (14) is provided on the side surface of one end of the rotating block (8) hinged to the clamping plate (5); the arc-shaped tooth portion (14) meshes with the tooth groove (13); when the movable plate (6) is axially translated in the movable blind hole (10), the rotating block (8) can rotate towards or away from each other through the cooperation of the arc-shaped tooth portion (14) and the tooth groove (13).

4. The clamping jaw for a square lithium battery according to claim 3, characterized in that: The reset mechanism comprises a plurality of guide rods (15) arranged perpendicular to the surface of the movable plate (6), one end of the guide rod (15) being fixedly connected to a surface of the movable plate (6) located in the movable blind hole (10), and the other end of the guide rod (15) passing through the end surface of the movable blind hole (10) to the outside of the clamping plate (5), and a spring (16) is coaxially sleeved on a portion of the guide rod (15) located between the clamping plate (5) and the movable plate (6).

5. The clamping jaw for a square lithium battery according to claim 1, characterized in that: The side of the clamping plate (5) and the movable plate (6) contacting the battery (7) is provided with an elastic buffer layer (17), and the outer wall of the clamping rod (9) is also wrapped with an elastic buffer layer (17). The elastic buffer layer (17) is made of rubber or silicone and has evenly distributed anti-slip raised patterns on its surface.

6. The clamping jaw for a square lithium battery according to claim 2, characterized in that: A plurality of movable straight rails (18) parallel to the axis of the movable blind hole (10) are symmetrically arranged on both sides of the movable plate (6); a plurality of rows of roller holes (19) are opened on the side wall of the movable blind hole (10) along the moving direction of the movable plate (6); rollers (20) can be movably embedded in the roller holes (19); after the rollers (20) are installed, a retaining plate (21) is installed on the side wall; the retaining plate (21) is opened with an exposure opening (22) parallel to the movable straight rail (18); a row of rollers (20) are slidably clamped in a movable straight rail (18) through the exposure opening (22); when the movable plate (6) moves, the rollers (20) rotate in the roller holes (19).

7. The clamping jaw for square lithium batteries according to claim 1, characterized in that: The clamping rod (9) is provided with a plurality of adjusting rods (23) perpendicular to the clamping rod (9) and parallel to each other. The rotating block (8) is provided with a through hole (24) perpendicular to the axial direction of the adjusting rod (23). The adjusting rod (23) can be coaxially inserted into the through hole (24). A fixing screw hole (25) penetrating the rotating block (8) is provided on a side wall of one side of the through hole (24), in which a fixing bolt (26) can be coaxially arranged. By loosening or tightening the fixing bolt (26), the distance between the clamping rod (9) and the rotating block (8) can be adjusted.

8. The clamping jaw for square lithium batteries according to claim 1, characterized in that: A guide rail (27) is installed below the mounting seat (1), and the guide rail (27) is a rigid linear guide rail. The extension direction of the guide rail (27) is parallel to the movement axis of the driving block (4). The clamping mechanism also includes a guide connecting block (28) arranged above the clamping plate (5), and a guide hole is arranged on the guide connecting block (28). The guide connecting block (28) is coaxially slidably arranged on the guide rail (27) through the guide hole, and the guide connecting block (28) is fixedly connected to the driving block (4).

9. The clamping jaw for square lithium batteries according to claim 8, characterized in that: Vertically upward connecting plates are provided on both sides of the guide rail (27), and are fixedly connected to the top surface of the mounting seat (1) via the connecting plates.

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