Square lithium battery size measuring device

Abstract

The utility model provides a square lithium battery size measuring device, which comprises a base, a clamping seat, a clamping ejector rod, a displacement sensor, a detection frame and a distance measuring sensor, sliding grooves are formed in the two ends of the top face of the base in the width direction correspondingly. The two clamping seats are oppositely and fixedly installed on the top face of the base in the length direction of the top face of the base. The clamping ejector rods are movably connected to the clamping seat, and the two clamping ejector rods can move in opposite directions so as to clamp a battery to be measured; the displacement sensor is arranged on the clamping ejector rod and used for detecting the moving distance of the clamping ejector rod. The two ends of the detection frame are slidably installed in the two sliding grooves respectively, and the detection frame allows a to-be-measured battery to pass through. The distance measuring sensor is installed on the detection frame and used for measuring the distance between the detection frame and the four side faces of the battery to be measured. The length, the width and the height can be measured at the same time through one-time clamping, the measurement efficiency is high, the measurement benchmark is unified, and the accuracy of the measurement result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a square lithium battery size measuring device. Background Art

[0002] During lithium battery production, each battery needs to be measured before packaging and shipping to identify substandard batteries. Dimensional measurements include: width, thickness, and height.

[0003] In the prior art, when measuring the size of a lithium battery, the lithium battery is generally fixed by a clamp, and then the width, thickness and height are measured one by one. Only one or two of the three dimensions can be measured each time. The lithium battery is then re-clamped by the clamp, and the other data are measured. The measurement efficiency is low, and multiple clampings lead to inconsistent measurement benchmarks, which affects the accuracy of the measurement results. Utility Model Content

[0004] In view of this, the present invention proposes a square lithium battery size measuring device to solve the technical problems proposed in the above background technology that only one or two of the three size data can be measured each time, the measurement efficiency is low, and multiple clamping leads to inconsistent measurement references, which affects the accuracy of the measurement results.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] The utility model provides a square lithium battery size measuring device, including a base, a clamping seat, a clamping mandrel, a displacement sensor, a detection frame and a distance sensor, wherein:

[0007] The top surface of the base is provided with sliding grooves at both ends along the width direction;

[0008] The two clamping seats are relatively fixedly installed on the top surface of the base along the length direction of the top surface of the base;

[0009] The clamping mandrel is movably connected to the clamping seat, and the two clamping mandrels can move toward each other to clamp the battery to be measured;

[0010] The displacement sensor is provided on the clamping mandrel and is used to detect the moving distance of the clamping mandrel;

[0011] The two ends of the detection frame are respectively slidably installed in the two sliding grooves, and the detection frame allows the battery to be measured to pass through;

[0012] The distance measuring sensor is installed on the detection frame and is used to measure the distance from the detection frame to the four sides of the battery to be measured.

[0013] On the basis of the above technical solution, preferably, the clamping mandrel only contacts the battery to be measured without clamping force; adsorption holes are provided at opposite ends of the two clamping mandrels, and a guide groove connected to the adsorption holes is provided inside the clamping mandrel, and the guide groove is connected to an air pump, which is installed on the clamping seat and is used to evacuate the guide groove and the adsorption hole to form a negative pressure in the adsorption hole, so that the negative pressure of the adsorption hole is sucked onto the outer surface of the battery to be measured.

[0014] On the basis of the above technical solution, preferably, a sealing plug is slidably provided in the adsorption hole, and the sealing plug is connected to the bottom of the adsorption hole through a reset spring. When the sealing plug is not subjected to external force, it is sealed and connected to the adsorption hole under the elastic force of the reset spring and protrudes out of the adsorption hole.

[0015] On the basis of the above technical solution, preferably, the end of the guide groove away from the adsorption hole is connected to a hose, the hose is connected to an exhaust pipe, and the exhaust pipe is fixed in the clamping seat and connected to the air pump.

[0016] On the basis of the above technical solution, preferably, the opposite end surfaces of the two clamping mandrels are connected with sealing rings, and the sealing rings are located outside the adsorption holes.

[0017] On the basis of the above technical solution, preferably, a plurality of avoidance grooves are provided on the top of the base;

[0018] The square lithium battery size measuring device also includes two groups of support rods and two rotating mechanisms. The two rotating mechanisms are respectively installed on both sides of the width direction of the base. Each group of support rods is connected to one rotating mechanism. The two groups of support rods are used to rotate to a vertical state under the drive of the rotating mechanism, extend from the avoidance groove to support the battery to be measured, or rotate to a horizontal state and be stored in the avoidance groove.

[0019] Based on the above technical solution, preferably, the rotating mechanism includes a connecting shaft, a worm wheel and a worm, the connecting shaft is fixedly connected to the worm wheel, each group of support rods is installed on the connecting shaft, and the worm is installed on the base and engages with the worm wheel.

[0020] On the basis of the above technical solution, preferably, a support pad is provided at one end of the support rod away from the connecting shaft, and the support pad is made of a soft material.

[0021] On the basis of the above technical solution, preferably, a connecting frame is connected to each side of the detection frame, two parallel electric slide rails are provided inside the base, a slide is installed on the electric slide rails, and the top of the slide is connected to the connecting frame.

[0022] On the basis of the above technical solution, preferably, it further includes an electric push rod, which is installed in the clamping seat and is drivingly connected to the clamping push rod.

[0023] The square lithium battery size measuring device of the present invention has the following advantages over the prior art:

[0024] (1) The two clamping rods can move toward each other to clamp the battery to be measured. The displacement sensor detects the moving distance of the clamping rods. The length of the battery to be measured is obtained by subtracting the moving distance of the two clamping rods from the distance between the two clamping rods before the movement. At the same time, the detection frame slides along the slide slot. When the battery to be measured passes through the detection frame, the distance sensor measures the distance from the detection frame to the four sides of the battery to be measured. The width and height of the battery to be measured are obtained by subtracting the corresponding distance from the width and height of the detection frame. The three dimensions of length, width and height can be measured simultaneously in one clamping operation. The measurement efficiency is high, and the measurement reference is unified, which improves the accuracy of the measurement results.

[0025] (2) The air pump is used to evacuate the guide groove and the adsorption hole so that a negative pressure is formed in the adsorption hole, so that the negative pressure of the adsorption hole is sucked onto the outer surface of the battery to be measured, thereby fixing the battery to be measured without applying a hard contact force to the battery to be measured, thereby avoiding damage to the surface of the battery to be measured due to excessive force, and improving the reliability of the device;

[0026] (3) A sealing plug is provided by sliding in the adsorption hole, and the sealing plug is connected to the bottom of the adsorption hole through a reset spring. When the sealing plug is not subjected to external force, it is sealed and connected to the adsorption hole under the elastic force of the reset spring, and protrudes from the adsorption hole. Air is input into the adsorption hole through an air pump, so that a normal pressure environment can be formed in the adsorption hole. The adsorption hole no longer has an adsorption force on the battery to be measured. The sealing plug protrudes from the adsorption hole, so that the clamping rod and the battery to be measured no longer fit together, making it easy to remove the battery to be measured and improving the convenience of operation.

[0027] (4) A hose is connected to one end of the guide groove away from the adsorption hole, and the hose is connected to the exhaust pipe. The exhaust pipe is fixed in the clamping seat and connected to the air pump. The hose is connected so that when the clamping rod moves, the hose can move with it, thereby maintaining the connection between the exhaust pipe and the guide groove and improving reliability.

[0028] (5) The support rod is driven to rotate to a vertical state and extend out of the avoidance groove by the rotating mechanism. The top of the support rod supports the battery to be measured, which is convenient for the clamping rod to clamp the battery to be measured. After the two clamping rods move to contact the battery to be measured and absorb the battery to be measured by negative pressure, the rotating mechanism drives the support rod to rotate to a horizontal state. The support rod is retracted into the avoidance groove to avoid interference with the movement of the detection frame and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a three-dimensional diagram of the square lithium battery size measuring device of the present invention;

[0031] Figure 2 It is a cross-sectional view of the clamping seat and its connecting parts of the utility model;

[0032] Figure 3 For the utility model Figure 2 A partial enlarged view of part A in the middle;

[0033] Figure 4 A cross-sectional view of the detection frame and its connecting components of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the support rod and the rotating mechanism of the utility model.

[0035] Explanation of the accompanying symbols: 1-base, 2-clamping seat, 3-clamping mandrel, 4-displacement sensor, 5-detection frame, 6-distance sensor, 7-air pump, 8-sealing plug, 9-reset spring, 10-hose, 11-exhaust pipe, 12-sealing ring, 13-support rod, 14-rotating mechanism, 15-handwheel, 16-connecting frame, 17-electric slide rail, 18-slide table, 19-electric push rod, 20-controller, 21-power plug;

[0036] 101-chute, 102-avoidance groove;

[0037] 301-adsorption hole, 302-guiding groove;

[0038] 131- support pad;

[0039] 141-connecting shaft, 142-worm gear, 143-worm. DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Reference Figure 1-Figure 5 As shown, the embodiment of the present utility model proposes a square lithium battery size measuring device, including a base 1, a clamping seat 2, a clamping mandrel 3, a displacement sensor 4, a detection frame 5 and a distance sensor 6, wherein:

[0042] The top surface of the base 1 is provided with a slide groove 101 at both ends along the width direction, and the slide groove 101 is provided along the length direction of the base 1;

[0043] The two clamping seats 2 are relatively fixedly installed on the top surface of the base 1 along the length direction of the top surface of the base 1;

[0044] The clamping mandrel 3 is movably connected to the clamping seat 2, and the two clamping mandrels 3 can move toward each other to clamp the battery to be measured; the moving direction of the clamping mandrel 3 is parallel to the length direction of the base 1;

[0045] The displacement sensor 4 is provided on the clamping mandrel 3 and is used to detect the movement distance of the clamping mandrel 3;

[0046] The two ends of the detection frame 5 are respectively slidably installed in the two sliding grooves 101, and the detection frame 5 allows the battery to be measured to pass through;

[0047] The distance measuring sensor 6 is mounted on the detection frame 5 and is used to measure the distance from the detection frame 5 to the four sides of the battery to be measured.

[0048] It should be noted that both the displacement sensor 4 and the distance sensor 6 use the measurement method of the prior art, and this embodiment does not involve improvements in the sensor measurement method. The length of the battery to be measured can be obtained by subtracting the movement distance of the two clamping mandrels 3 from the spacing between the two clamping mandrels 3 before the two mandrels move toward each other. The cross-sectional shape of the inner frame of the detection frame 5 is square. By measuring the distance from the inner frame of the detection frame 5 to the top, bottom, front and back of the battery to be measured, the width of the battery to be measured can be obtained by subtracting the distance from the inner frame to the front and back from the width of the inner frame of the detection frame 5, and the height of the battery to be measured can be obtained by subtracting the distance from the inner frame to the top and bottom from the height of the inner frame.

[0049] The square lithium battery size measuring device proposed in this embodiment is capable of moving toward each other by two clamping mandrels 3 to clamp the battery to be measured. The displacement sensor 4 detects the movement distance of the clamping mandrel 3; at the same time, the detection frame 5 slides along the slide groove 101. When the battery to be measured passes through the detection frame 5, the distance sensor 6 measures the distance from the detection frame 5 to the four sides of the battery to be measured; the length, width and height can be measured simultaneously in one clamping, the measurement efficiency is high, and the measurement reference is unified, thereby improving the accuracy of the measurement results.

[0050] In some embodiments, the clamping mandrel 3 is only in contact with the battery to be measured without clamping force; an adsorption hole 301 is provided at the opposite end of the two clamping mandrels 3, and a guide groove 302 connected to the adsorption hole 301 is provided inside the clamping mandrel 3. The guide groove 302 is connected to the air pump 7, and the air pump 7 is installed on the clamping seat 2, and is used to evacuate the guide groove 302 and the adsorption hole 301 so that the adsorption hole 301 forms a negative pressure, so that the adsorption hole 301 is negatively pressured and sucked onto the outer surface of the battery to be measured. The air pump 7 evacuates the guide groove 302 and the adsorption hole 301 so that the adsorption hole 301 forms a negative pressure, so that the adsorption hole 301 is negatively pressured and sucked onto the outer surface of the battery to be measured, thereby fixing the battery to be measured without applying hard contact force to the battery to be measured, avoiding damage to the surface of the battery to be measured due to excessive force, and improving the reliability of the device.

[0051] In some embodiments, a sealing plug 8 is slidably provided in the adsorption hole 301. The sealing plug 8 is connected to the bottom of the adsorption hole 301 by a reset spring 9. When no external force is applied, the sealing plug 8 is sealed and connected to the adsorption hole 301 under the elastic force of the reset spring 9, and protrudes from the adsorption hole 301. When the two clamping rods 3 approach each other, the clamping rod 3 will press against the battery to be measured, and the sealing plug 8 will slide into the adsorption hole 301 under the pressure of the battery to be measured. The sealing plug 8 no longer blocks the adsorption hole 301, and the air pump 7 is started to evacuate the guide groove 302 and the adsorption hole 301 to form a negative pressure in the adsorption hole 301. After the test is completed, air is input into the adsorption hole 301 through the air pump 7, so that a normal pressure environment is formed in the adsorption hole 301. The adsorption hole 301 no longer has an adsorption force on the battery to be measured. The sealing plug 8 protrudes from the adsorption hole 301, so that the clamping rod 3 and the battery to be measured are no longer in contact, making it easier to remove the battery to be measured and improving operational convenience.

[0052] In some embodiments, a hose 10 is connected to one end of the guide groove 302 away from the adsorption hole 301. The hose 10 is connected to an exhaust pipe 11, which is fixed in the clamping base 2 and connected to the air pump 7. Through the connection of the hose 10, the hose 10 can move with the clamping rod 3 when it moves, maintaining the connection between the exhaust pipe 11 and the guide groove 302 and improving reliability.

[0053] In some embodiments, the opposing end surfaces of the two clamping rods 3 are connected to sealing rings 12, which are located outside the adsorption holes 301. The sealing rings 12 connected to the opposing end surfaces of the two clamping rods 3 seal the clamping rods 3 and the battery to be measured, improving the sealing performance, ensuring the continuation of the negative pressure environment, and improving the reliability of the device.

[0054] On the basis of the above technical solution, preferably, a plurality of avoidance grooves 102 are provided on the top of the base 1; the square lithium battery size measuring device further comprises two sets of support rods 13 and two rotating mechanisms 14, the two rotating mechanisms 14 being respectively installed on both sides of the width direction of the base 1, each set of support rods 13 being connected to one rotating mechanism 14, and the two sets of support rods 13 being driven by the rotating mechanisms 14 to rotate to a vertical state, extending from the avoidance grooves 102 to support the battery to be measured, or rotating to a horizontal state and retracting into the avoidance grooves 102. The rotating mechanisms 14 drive the support rods 13 to rotate to a vertical state and extend out of the avoidance grooves 102, the tops of the support rods 13 supporting the battery to be measured, facilitating the clamping of the battery to be measured by the clamping mandrels 3, after the two clamping mandrels 3 move to contact the battery to be measured and absorb the battery to be measured by negative pressure, the rotating mechanisms 14 drive the support rods 13 to rotate to a horizontal state, and the support rods 13 are retracted into the avoidance grooves 102, thereby avoiding interference with the movement of the detection frame 5 and improving reliability.

[0055] In some embodiments, the rotating mechanism 14 includes a connecting shaft 141, a worm gear 142, and a worm 143. The connecting shaft 141 is fixedly connected to the worm gear 142. Each set of support rods 13 is mounted on the connecting shaft 141. The worm gear 143 is mounted on the base 1 and meshes with the worm gear 142. The rotation of the worm gear 143 drives the rotation of the worm gear 142, thereby achieving the rotation of the connecting shaft 141 and driving the rotation of the support rods 13. The two worm gears 143 rotate in opposite directions, so that the two sets of support rods 13 rotate towards each other and rotate to a vertical or horizontal state at the same time.

[0056] In some embodiments, in order to facilitate the rotation of the worm 143 , a hand wheel 15 may be provided. The hand wheel 15 is connected to the worm 143 , and the worm 143 is rotated by rotating the hand wheel 15 .

[0057] Of course, in some other embodiments, the rotation of the worm 143 can also be achieved through an electric drive (such as a motor).

[0058] In some embodiments, a support pad 131 is provided at the end of the support rod 13 away from the connecting shaft 141. The support pad 131 is made of a soft material. By providing the support pad 131 at the end of the support rod 13 away from the connecting shaft 141, the support pad 131 can be made of a soft material such as silicone to provide a buffer between the battery to be measured and the support rod 13, thereby preventing damage to the battery to be measured and improving the reliability of the device.

[0059] In some embodiments, a connecting frame 16 is connected to each side of the detection frame 5, and the connecting frame 16 passes through the slide slot 101. Two parallel electric slide rails 17 are provided inside the base 1, and a slide 18 is installed on the electric slide rail 17. The top of the slide 18 is connected to the connecting frame 16. After the clamping rod 3 fixes the battery to be measured, the slide 18 is synchronously driven by the electric slide rail 17 to move, so that the connecting member slides along the slide slot 101, thereby moving the detection frame 5 along the slide slot 101. When the battery to be measured passes through the detection frame 5, the distance sensor 6 measures the distance from the detection frame 5 to the four sides of the battery to be measured, thereby achieving synchronous measurement of the three parameters of length, width and height.

[0060] In some embodiments, the square lithium battery size measuring device further includes an electric push rod 19, which is installed in the clamping seat 2 and is drivingly connected to the clamping mandrel 3. The electric push rod 19 drives the clamping mandrel 3 to move, thereby achieving automatic movement of the clamping mandrel 3.

[0061] In some embodiments, a controller 20 can also be provided. The controller 20 is electrically connected to the air pump 7, the electric push rod 19, the electric slide rail 17, the distance sensor 6 and the displacement sensor 4. The controller 20 is also connected to a power plug 21 for power supply. The power plug 21 is installed on the base 1.

[0062] The working principle of the square lithium battery size measuring device is:

[0063] The battery to be measured is placed on the top of the support rod 13, and the multiple groups of support rods 13 will support the battery to be measured. The controller 20 starts the electric push rod 19, and the electric push rod 19 will push the clamping rod 3 to move outward. The clamping rod 3 moving outward will press against the battery to be measured, and the sealing plug 8 will slide into the adsorption hole 301 under the squeezing of the battery to be measured. The sealing plug 8 no longer blocks the adsorption hole 301, and the controller 20 starts the air pump 7. The air pump 7 extracts the air in the guide groove 302 and the adsorption hole 301 through the hose 10 and the suction pipe, forming a negative pressure environment in the adsorption hole 301. The adsorption hole 301 will absorb the battery to be measured and fix the battery to be measured on the clamping rod 3. At the same time, the displacement sensor 4 will detect the moving distance of the clamping rod 3. The controller 20 calculates the length data of the battery to be measured based on the moving distance of the clamping rod 3 and the distance between the two clamping rods 3 before moving.

[0064] Turn the handwheel 15, the worm gear 142 rotates through the worm 143, the worm gear 142 drives the connecting shaft 141 to rotate, and the rotating connecting shaft 141 drives the support rod 13 to rotate downward, and the support rod 13 detaches from the battery to be measured and enters the base 1;

[0065] The controller 20 activates the electric slide 17, which drives the connecting frame 16 and the detection frame 5 to move rightward via the slide 18. The battery to be measured enters the detection frame 5 moving rightward. The controller 20 activates the distance sensor 6, which calculates the distance between the battery to be measured and the detection frame 5 based on the time difference between the emitted laser and the received reflected laser. The controller 20 calculates the width and height of the battery to be measured based on the distance detected by the distance sensor 6 and the size data of the detection frame 5. The detection frame 5 moving rightward can perform a comprehensive inspection of the battery to be measured.

[0066] After the test is completed, the electric slide 17 drives the connecting frame 16 and the test frame 5 to move in the opposite direction through the slide 18. The test frame 5 returns to its original position and rotates the worm 143 in the opposite direction. The worm 143 drives the connecting shaft 141 to rotate in the opposite direction through the worm gear 142. The connecting shaft 141 drives the support rod 13 to rotate upward. The support rod 13 rotates to the bottom of the battery to be measured and supports the battery to be measured.

[0067] The controller 20 starts the air pump 7, which inputs air into the guide groove 302 and the adsorption hole 301 through the hose 10 and the suction tube. The normal pressure environment is restored in the adsorption hole 301, and the adsorption hole 301 no longer adsorbs the battery to be measured. The controller 20 starts the electric push rod 19, and the electric push rod 19 drives the clamping push rod 3 to move inward through the sliding plate. The clamping push rod 3 no longer presses against the battery to be measured, and the battery to be measured is removed from the support rod 13.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A square lithium battery size measuring device, characterized in that: It comprises a base (1), a clamping seat (2), a clamping mandrel (3), a displacement sensor (4), a detection frame (5) and a distance sensor (6), wherein: The top surface of the base (1) is provided with sliding grooves (101) at both ends along the width direction; The two clamping seats (2) are relatively fixedly mounted on the top surface of the base (1) along the length direction of the top surface of the base (1); The clamping mandrel (3) is movably connected to the clamping seat (2), and the two clamping mandrels (3) can move toward each other to clamp the battery to be measured; The displacement sensor (4) is arranged on the clamping mandrel (3) and is used to detect the moving distance of the clamping mandrel (3); The two ends of the detection frame (5) are respectively slidably mounted in the two sliding grooves (101), and the detection frame (5) allows the battery to be measured to pass through; The distance measuring sensor (6) is mounted on the detection frame (5) and is used to measure the distance from the detection frame (5) to the four side surfaces of the battery to be measured.

2. The square lithium battery size measuring device according to claim 1, characterized in that: The clamping mandrel (3) is only in contact with the battery to be measured without clamping force; an adsorption hole (301) is provided at one opposite end of the two clamping mandrels (3); a guide groove (302) connected to the adsorption hole (301) is provided inside the clamping mandrel (3); the guide groove (302) is connected to an air pump (7); the air pump (7) is installed on the clamping seat (2) and is used to evacuate the guide groove (302) and the adsorption hole (301) so that the adsorption hole (301) forms a negative pressure, so that the negative pressure of the adsorption hole (301) is sucked onto the outer surface of the battery to be measured.

3. The square lithium battery size measuring device according to claim 2, characterized in that: A sealing plug (8) is slidably provided in the adsorption hole (301), and the sealing plug (8) is connected to the bottom of the adsorption hole (301) through a return spring (9). When no external force is applied, the sealing plug (8) is sealed and connected to the adsorption hole (301) under the elastic force of the return spring (9), and protrudes from the adsorption hole (301).

4. The square lithium battery size measuring device according to claim 3, characterized in that: One end of the guide groove (302) away from the adsorption hole (301) is connected to a hose (10), and the hose (10) is connected to an exhaust pipe (11). The exhaust pipe (11) is fixed in the clamping seat (2) and connected to the air pump (7).

5. The square lithium battery size measuring device according to claim 4, characterized in that: The opposite end surfaces of the two clamping mandrels (3) are connected with sealing rings (12), and the sealing rings (12) are located outside the adsorption holes (301).

6. The square lithium battery size measuring device according to claim 1, wherein: A plurality of avoidance grooves (102) are provided on the top of the base (1); The square lithium battery size measuring device further comprises two groups of support rods (13) and two rotating mechanisms (14). The two rotating mechanisms (14) are respectively installed on both sides of the width direction of the base (1). Each group of support rods (13) is connected to one rotating mechanism (14). The two groups of support rods (13) are used to rotate to a vertical state under the drive of the rotating mechanism (14) and extend from the avoidance groove (102) to support the battery to be measured, or rotate to a horizontal state and be stored in the avoidance groove (102).

7. The square lithium battery size measuring device according to claim 6, characterized in that: The rotating mechanism (14) comprises a connecting shaft (141), a worm wheel (142) and a worm (143); the connecting shaft (141) is fixedly connected to the worm wheel (142); each group of support rods (13) is mounted on the connecting shaft (141); and the worm (143) is mounted on the base (1) and meshes with the worm wheel (142).

8. The square lithium battery size measuring device according to claim 7, characterized in that: A support pad (131) is provided at one end of the support rod (13) away from the connecting shaft (141), and the support pad (131) is made of a soft material.

9. The square lithium battery size measuring device according to claim 1, wherein: A connecting frame (16) is connected to each of the two sides of the detection frame (5), and two parallel electric slide rails (17) are provided inside the base (1). A slide platform (18) is installed on the electric slide rail (17), and the top of the slide platform (18) is connected to the connecting frame (16).

10. The square lithium battery size measuring device according to any one of claims 1 to 9, characterized in that: It also includes an electric push rod (19), which is installed in the clamping seat (2) and is drivingly connected to the clamping top rod (3).

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