Restraint tray for testing square-shell lithium battery and testing equipment

Abstract

The invention is suitable for the technical field of lithium battery testing, and provides a restraining tray for square shell lithium battery testing and testing device.The restraining tray for square shell lithium battery testing comprises a tray rack body, the tray rack body comprises a surrounding plate and two sets of bottom plates arranged in the surrounding plate, and a partition plate is arranged between the two sets of bottom plates; the restraining mechanism comprises a first restraining plate and a second restraining plate, the second restraining plate is fixedly installed in the middle of the bottom plate, the first restraining plate is arranged on the two sides of the second restraining plate, and a synchronous driving assembly is further arranged at the bottom of the bottom plate; through cooperative arrangement of the restraining mechanism and the cleaning mechanism, the problems that most of existing testing devices are simple in structure and single in function, in order to prevent dust and other impurities from affecting the testing effect when charging and discharging testing is conducted on the square-shell lithium battery, the positive electrode and the negative electrode of the square-shell lithium battery need to be manually and additionally wiped before testing, and the testing efficiency is high are solved. And the test efficiency is seriously influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery testing, in particular to a restraint tray and testing equipment for testing square-shell lithium batteries. Background Art

[0002] Against the backdrop of rising global demand for clean energy, prismatic lithium-ion batteries, with their high energy density, excellent cycle stability, and structural safety, have become a core power source for new energy vehicles, energy storage power stations, and other sectors. However, the complex electrochemical reactions and thermal effects associated with the charging and discharging of lithium-ion batteries necessitate rigorous performance testing throughout R&D, production, and quality inspection to ensure product quality and safety. These tests encompass multiple dimensions, including charge and discharge performance, cycle life, tolerance to overcharge and overdischarge, and thermal runaway protection.

[0003] Most existing testing equipment is simple in structure and limited in function. When performing charge and discharge tests on square-shell lithium batteries, manual cleaning of the positive and negative electrodes is required to prevent dust and other impurities from affecting the test results, severely impacting test efficiency. Therefore, in response to this situation, there is an urgent need to provide a restraint tray and testing equipment for testing square-shell lithium batteries to overcome these shortcomings in current practical applications. Summary of the Invention

[0004] The object of the present invention is to provide a restraint tray and testing equipment for testing square-shell lithium batteries, aiming to solve the problems in the above-mentioned background technology.

[0005] The present invention is implemented as follows: a restraint tray for testing square-shell lithium batteries, comprising: A pallet rack body, the pallet rack body comprising a panel and a bottom plate disposed within the panel, wherein the bottom plates are provided in two groups, and a partition is provided between the two groups of bottom plates; A restraint mechanism, comprising a first restraint plate and a second restraint plate, wherein the second restraint plate is fixedly mounted in the middle of the base plate, the first restraint plate is disposed on both sides of the second restraint plate, and a synchronous drive assembly for driving the first restraint plate toward or away from the second restraint plate is further disposed at the bottom of the base plate; And a cleaning mechanism for cleaning the positive and negative electrodes of the square shell lithium battery during the fixing process, wherein multiple groups of the cleaning mechanisms are provided.

[0006] As a further solution of the present invention: the restraint plate 1 is provided with two groups on both sides of the restraint plate 2, and the restraint plate 2 and the restraint plate 1 at both ends are provided with cleaning mechanisms.

[0007] As a further solution of the present invention: a plurality of guide rods are further provided in the base plate, and through holes for the guide rods to pass through are provided at the bottoms of the first and second restraint plates.

[0008] As a further solution of the present invention: the bottom plate is further provided with a limiting groove for limiting the placement position of the square shell lithium battery.

[0009] As a further solution of the present invention: the synchronous drive assembly includes: Multiple sets of rotating shafts, each of which is rotatably mounted on the bottom of the second restraint plate and the multiple sets of first restraint plates; Linking short rods, two of which are provided below the restraint plate 1 at both ends, one of which is rotatably connected to the rotating shaft, and the other is fixedly connected to the rotating shaft; A linkage long rod, wherein two linkage long rods are provided below the second restraint plate and the first restraint plate adjacent to the second restraint plate, wherein one linkage long rod is rotatably connected to the rotating shaft, and the other linkage long rod is fixedly connected to the rotating shaft; A connecting shaft, the connecting shaft being used for rotational connection between the linkage long rods and between the linkage long rods and the linkage short rods; And a telescopic member fixedly installed on the bottom of the base plate, wherein the telescopic end of the telescopic member is fixedly connected to a restraining plate at one end thereof through a linkage frame.

[0010] As a further solution of the present invention: the length of the linkage short rod is half the length of the linkage long rod.

[0011] As a further solution of the present invention: the cleaning mechanism includes: Rotating tubes, two groups of rotating tubes are rotatably mounted on the second restraint plate, and the two groups of rotating tubes are symmetrically arranged; A cleaning brush assembly, wherein the cleaning brush assembly is arranged on the rotating tube; An air guide box is fixedly mounted on the second restraint plate, and a through hole is provided on the side wall of the rotating tube, which is in communication with the air guide box, and the air guide box and the rotating tube are in rotational cooperation; Conduit 1, the conduit 1 is used for communication between the two groups of air guide boxes, and one group of air guide boxes is also provided with an air intake pipe; And a power module for driving the rotating tube to rotate and reset.

[0012] As a further solution of the present invention: the cleaning component includes: A rotating plate, the rotating plate is fixedly mounted on the rotating tube, and a plurality of compression cylinders are fixedly mounted on the rotating plate; A second spring is slidably mounted in the compression cylinder, a push tube is fixedly mounted on the second spring, a through hole is provided at the bottom of the compression cylinder for the push tube to pass through, and a circular hole is provided on the second spring that is in communication with the push tube; A second conduit, the second conduit being used for communicating between the top of the compression cylinder and the rotating tube, and the second conduit being rotationally connected to the rotating tube; A second piston for elastically pulling the second spring, wherein the second piston is disposed in the compression cylinder; An air jet plate is fixedly mounted on the bottom of the push tube, wherein the air jet plate has a cavity in communication with the push tube, and a spray hole in communication with the cavity is formed at the bottom of the air jet plate; and a brush bar, which is arranged at the bottom of the jet plate.

[0013] As a further solution of the present invention: the power module includes: A driving tube is slidably mounted on the bottom of the rotating tube. The rotating tube can rotate along with the driving tube. A piston 1 fixedly connected to the rotating tube is slidably mounted in the driving tube. The piston 1 has a circular hole connected to the rotating tube. A spring 1 for pushing the driving tube to press against the top of the restraining plate 2, wherein the spring is sleeved on the rotating tube; A protrusion is slidably mounted on the inner wall of the second restraint plate, the protrusion is rotationally engaged with the drive tube, and the protrusion can move along the length direction of the rotating tube with the drive tube; a return torsion spring sleeved on the drive tube, wherein one end of the return torsion spring is fixedly connected to the protrusion, and the other end of the return torsion spring is fixedly connected to the outer wall of the drive tube; A driving shaft rotatably mounted in the second restraint plate, wherein a driving block is fixedly mounted on the driving shaft, and a plurality of groups of protrusions are provided on the driving block; A driven block fixedly mounted on the bottom of the driving tube, wherein the bottom of the driven block is provided with a recessed hole for accommodating the protrusion; Rotating a transmission rod 2 installed in the restraint plate 2, wherein the transmission rod 2 is connected to the drive shaft via a transmission member; A transmission rod 1 is rotatably installed in the restraint plate 2, and a speed change gear set is provided between the transmission rod 1 and the rotating shaft and between the transmission rod 1 and the transmission rod 2.

[0014] A square-shell lithium battery testing device comprises the restraint tray for square-shell lithium battery testing as described above.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Multiple groups of square-shell lithium batteries are placed in sequence between adjacent restraint plates 1 and between restraint plates 1 and 2. This is preferably suitable for charge and discharge tests of square-shell batteries of the same size. The synchronous drive assembly is used to drive multiple groups of restraint plates 1 to move toward the side of restraint plate 2 at the same time. The restraint plates 1 and 2 cooperate to fix the square-shell lithium batteries, thereby achieving the restraint effect on the square-shell lithium batteries. In addition, during the movement of restraint plate 1, the cleaning mechanism is activated, and the cleaning mechanism can be used to clean the positive and negative electrodes of the square-shell lithium batteries to prevent dust and other impurities from affecting the test results. The present invention avoids the problem that most existing testing equipment has a simple structure and a single function through the coordinated arrangement of a restraining mechanism and a cleaning mechanism. When performing charge and discharge tests on square-shell lithium batteries, in order to prevent dust and other impurities from affecting the test results, manual wiping of the positive and negative electrodes of the square-shell lithium batteries is required before the test, which seriously affects the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the upward-looking structure.

[0019] Figure 3 Schematic diagram of the structure of the restraint mechanism in the present invention.

[0020] Figure 4 It is a structural schematic diagram of the restraint plate 2 and the cleaning mechanism in the present invention.

[0021] Figure 5 It is a structural schematic diagram of the cleaning component in the present invention.

[0022] Figure 6 Schematic diagram of the internal structure of the restraint plate 2 in the present invention.

[0023] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 8 for Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0025] In the accompanying drawings: 1-enclosing plate, 2-restraint plate 1, 3-partition plate, 4-bottom plate, 5-guide rod, 6-linkage frame, 7-telescopic member, 8-rotating shaft, 9-linkage long rod, 10-linkage short rod, 11-connecting shaft, 12-restraint plate 2, 13-limiting groove, 14-rotating plate, 15-rotating tube, 16-intake pipe, 17-air guide box, 18-duct 1, 19-duct 2, 20-compression cylinder, 21-push tube, 22-brush strip, 23-jet plate, 24-spray hole, 25-speed gear set, 26-transmission rod 1, 27-transmission rod 2, 28-transmission member, 29-drive shaft, 30-drive block, 31-bump, 32-reset torsion spring, 33-driven block, 34-drive tube, 35-spring 1, 36-piston 1, 37-limiting frame, 38-spring 2, 39-piston 2. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] The present invention will be further explained below with reference to specific embodiments.

[0030] See also Figures 1-8 The embodiment of the present invention provides a restraint tray for testing a square-shell lithium battery, comprising: The pallet rack body includes a panel 1 and a bottom plate 4 disposed inside the panel 1. The bottom plates 4 are provided in two groups, and a partition plate 3 is provided between the two groups of bottom plates 4. The restraint mechanism includes a restraint plate 1 2 and a restraint plate 2 12. The restraint plate 2 12 is fixedly mounted in the middle of the base plate 4. The restraint plates 1 2 are arranged on both sides of the restraint plate 2 12. The bottom of the base plate 4 is also provided with a synchronous drive assembly for driving the restraint plate 1 2 toward or away from the restraint plate 2 12. And a cleaning mechanism for cleaning the positive and negative electrodes of the square shell lithium battery during the fixing process, wherein multiple groups of the cleaning mechanisms are provided.

[0031] In an embodiment of the present invention, when in use, multiple groups of square-shell lithium batteries are placed in sequence between adjacent restraint plates 1 2 and between restraint plates 1 2 and restraint plates 2 12. It is preferentially suitable for charge and discharge tests of square-shell batteries of the same size. The synchronous drive component is used to drive multiple groups of restraint plates 1 2 to move simultaneously toward the side of restraint plate 2 12. The restraint plates 1 2 and 12 cooperate with each other to fix the square-shell lithium batteries, thereby achieving the restraint effect on the square-shell lithium batteries. In the process of movement of restraint plate 1 2, the cleaning mechanism will be activated. The cleaning mechanism can be used to clean the positive and negative poles of the square-shell lithium batteries, thereby avoiding the influence of dust and other impurities on the test results. Compared with the prior art, the present invention avoids the problem that most of the existing test equipment has a simple structure and a single function through the coordinated setting of the restraint mechanism and the cleaning mechanism. When performing charge and discharge tests on the square-shell lithium batteries, in order to avoid the influence of dust and other impurities on the test results, the positive and negative poles of the square-shell lithium batteries need to be manually wiped before the test, which seriously affects the test efficiency.

[0032] In one embodiment of the present invention, see Figures 1-8 , the restraint plate 1 2 is provided with two groups on each side of the restraint plate 2 12, and the restraint plate 2 12 and the restraint plate 1 2 at both ends are provided with a cleaning mechanism; The bottom plate 4 is further provided with a plurality of guide rods 5, and the bottoms of the restraint plate 1 2 and the restraint plate 2 12 are both provided with through holes for the guide rods 5 to pass through; The bottom plate 4 is also provided with a limiting groove 13 for limiting the placement position of the square shell lithium battery.

[0033] In this embodiment, the cleaning mechanisms are arranged at intervals to prevent adjacent cleaning mechanisms from interfering with each other due to changes in the distance between restraint plates 1 2 and 1 2 and between restraint plates 1 2 and 2 12 during the clamping process.

[0034] In one embodiment of the present invention, see Figures 1-8 , the synchronous drive assembly includes: Multiple sets of rotating shafts 8, each of which is rotatably mounted on the bottom of the second restraint plate 12 and the multiple sets of the first restraint plate 2; Linking short rods 10, two of which are provided below the restraining plates 2 at both ends, one of which is rotatably connected to the rotating shaft 8, and the other is fixedly connected to the rotating shaft 8; Linking long rods 9, two of which are provided below the restraint plate 2 12 and the restraint plate 1 2 adjacent to the restraint plate 2 12, one of which is rotatably connected to the rotating shaft 8, and the other is fixedly connected to the rotating shaft 8; A connecting shaft 11 is used for rotational connection between the linkage long rods 9 and between the linkage long rods 9 and the linkage short rods 10; and a telescopic member 7 fixedly mounted on the bottom of the base plate 4, wherein the telescopic end of the telescopic member 7 is fixedly connected to the restraining plate 2 at one end thereof via a linkage frame 6; The length of the linkage short rod 10 is half the length of the linkage long rod 9 .

[0035] In this embodiment, the telescopic member 7 is arranged in cooperation with the linkage frame 6 to drive the movement of one of the end restraint plates 2. When the restraint plate 12 approaches the restraint plate 2 12, the driving action of the linkage short rod 10 and the linkage long rod 9 can make multiple groups of restraint plates 2 move synchronously, and the rotating shaft 8 will rotate inside the restraint plate 12 and the restraint plate 2 12, so as to facilitate the driving of the cleaning mechanism.

[0036] In one embodiment of the present invention, see Figures 1-8 The structures of the multiple cleaning mechanisms are the same. Taking the cleaning mechanism installed on the restraint plate 2 12 as an example, the cleaning mechanism includes: Rotating tubes 15, two groups of rotating tubes 15 are rotatably mounted on the second restraint plate 12, and the two groups of rotating tubes 15 are symmetrically arranged; A cleaning brush assembly, the cleaning brush assembly is arranged on the rotating tube 15; An air guide box 17 is fixedly mounted on the second restraint plate 12. A through hole is provided on the side wall of the rotating tube 15, which is in communication with the air guide box 17. The air guide box 17 and the rotating tube 15 are rotatably engaged with each other. A conduit 18 is provided for connecting the two groups of air guide boxes 17, and an air intake pipe 16 is provided on one group of air guide boxes 17; and a power module for driving the rotating tube 15 to rotate and reset; The cleaning component comprises: A rotating plate 14 is fixedly mounted on the rotating tube 15 and has multiple sets of compression cylinders 20 fixedly mounted on the rotating plate 14; A second spring 38 is slidably mounted in the compression cylinder 20. The push tube 21 is fixedly mounted on the second spring 38. The bottom of the compression cylinder 20 has a through hole for the push tube 21 to pass through. The second spring 38 also has a circular hole in communication with the push tube 21. A second conduit 19 is used to connect the top of the compression cylinder 20 with the rotating tube 15, and the second conduit 19 is rotatably connected to the rotating tube 15; wherein the second conduit 19 is provided with two sections, and the other section is used to connect adjacent compression cylinders 20; A second piston 39 for elastically pulling the second spring 38, wherein the second piston 39 is disposed in the compression cylinder 20; An air jet plate 23 is fixedly mounted on the bottom of the push tube 21. The air jet plate 23 has a cavity in communication with the push tube 21, and a spray hole 24 in communication with the cavity is formed at the bottom of the air jet plate 23. and a brush strip 22 , the brush strip 22 being disposed at the bottom of the air jet plate 23 ; The power module includes: A drive tube 34 is slidably mounted on the bottom of the rotating tube 15. The rotating tube 15 can rotate along with the drive tube 34. A piston 1 36 is slidably mounted in the drive tube 34 and is fixedly connected to the rotating tube 15. The piston 1 36 has a circular hole that communicates with the rotating tube 15. A spring 1 35 for pushing the driving tube 34 to press against the top of the restraining plate 2 12 , wherein the spring 1 35 is sleeved on the rotating tube 15 ; A protrusion 31 is slidably mounted on the inner wall of the second restraint plate 12. The protrusion 31 is rotationally engaged with the drive tube 34, and the protrusion 31 can follow the drive tube 34 in the longitudinal direction of the rotating tube 15. A return torsion spring 32 is sleeved on the drive tube 34 , one end of the return torsion spring 32 is fixedly connected to the protrusion 31 , and the other end of the return torsion spring 32 is fixedly connected to the outer wall of the drive tube 34 ; A drive shaft 29 is rotatably mounted in the second restraint plate 12 , and a drive block 30 is fixedly mounted on the drive shaft 29 , and a plurality of groups of protrusions 31 are provided on the drive block 30 ; A driven block 33 fixedly mounted on the bottom of the driving tube 34, wherein a recessed hole for accommodating the protrusion 31 is formed at the bottom of the driven block 33; A second transmission rod 27 is rotatably mounted in the second restraint plate 12, and the second transmission rod 27 is connected to the drive shaft 29 via a transmission member 28; wherein the transmission member 28 is a combination structure of a pulley and a transmission belt; A transmission rod 26 is rotatably installed in the restraint plate 2 12, and a speed change gear set 25 is provided between the transmission rod 26 and the rotating shaft 8 and between the transmission rod 26 and the transmission rod 2 27; wherein the speed change gear set 25 is two sets of gears meshing with each other, and the pitch circle diameter of the gear serving as the driving end is larger than the pitch circle diameter of the gear serving as the driven end, so that the rotation speed of the rotating shaft 8, the transmission rod 26 and the transmission rod 2 27 increases successively, thereby driving the drive shaft 29 to rotate rapidly, so that the number of rotations of the drive shaft 29 is greater than the number of rotations of the rotating shaft 8.

[0037] In this embodiment, when working, the air inlet pipe 16 is connected to the external air source. When the synchronous drive assembly is working, the air inlet pipe 16 is used to introduce the gas into the rotating tube 15. The gas in the rotating tube 15 will enter the second conduit 19 and the driving tube 34 respectively. The gas entering the driving tube 34 will push the driving tube 34 downward, so that the driven block 33 can be pressed onto the driving block 30. When the rotating shaft 8 rotates, the driving shaft 29 can drive the driving block 30 to rotate quickly. When the protrusion 31 is stuck in the concave hole, the driven block 33 can follow the driving block 30 to rotate, thereby driving the driving tube 34 and the rotating tube 15 to rotate. The gas in the second conduit 19 will enter the compression cylinder 20 and push The push tube 21 moves downward, and at the same time, part of the gas will enter the jet plate 23 through the push tube 21 and be ejected through the nozzle hole 24. In conjunction with the rotating tube 15 driving the rotating plate 14 to rotate, the brush strip 22 and the gas ejected from the nozzle hole 24 can clean the area near the positive and negative electrodes, thereby improving the test accuracy. After the cleaning is completed, the air inlet pipe 16 extracts the gas in the rotating tube 15. At this time, the piston 2 39 pulls the spring 2 38 and the push tube 21 to reset, and the spring 1 35 pushes the driving tube 34 to reset, so that the driven block 33 is separated from the driving block 30. At this time, under the torsion action of the reset torsion spring 32, the rotating tube 15 will be driven to reset, so that the rotating plate 14 rotates to the top of the restraint plate 2 12, that is, attached. Figure 4 to avoid interfering with subsequent testing work.

[0038] See also Figures 1-8 An embodiment of the present invention provides a square-shell lithium battery testing device, including the restraint tray for square-shell lithium battery testing as described above.

[0039] In this embodiment, the equipment used for performing charge and discharge tests on square-shell lithium batteries can adopt existing public technologies.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A restraint tray for testing prismatic lithium batteries, comprising a tray frame body, the tray frame body comprising a panel and a bottom plate disposed within the panel, the bottom plates being provided in two groups, and a partition being provided between the two groups of bottom plates, characterized in that: Also includes: A restraint mechanism, comprising a first restraint plate and a second restraint plate, wherein the second restraint plate is fixedly mounted in the middle of the base plate, the first restraint plate is disposed on both sides of the second restraint plate, and a synchronous drive assembly for driving the first restraint plate toward or away from the second restraint plate is further disposed at the bottom of the base plate; And a cleaning mechanism for cleaning the positive and negative electrodes of the square shell lithium battery during the fixing process, wherein multiple groups of the cleaning mechanisms are provided.

2. The restraint tray for testing square-shell lithium batteries according to claim 1, characterized in that: The restraint plate 1 is provided with two groups on both sides of the restraint plate 2, and the restraint plate 2 and the restraint plate 1 at both ends are provided with cleaning mechanisms.

3. The restraint tray for testing square-shell lithium batteries according to claim 2, characterized in that: A plurality of guide rods are further arranged in the bottom plate, and through holes for the guide rods to pass through are opened at the bottoms of the first and second restraint plates.

4. The restraint tray for testing square-shell lithium batteries according to claim 1, characterized in that: The bottom plate is also provided with a limiting groove for limiting the placement position of the square shell lithium battery.

5. The restraint tray for testing square-shell lithium batteries according to claim 1, characterized in that: The synchronous drive assembly comprises: Multiple sets of rotating shafts, each of which is rotatably mounted on the bottom of the second restraint plate and the multiple sets of first restraint plates; Linking short rods, two of which are provided below the restraint plate 1 at both ends, one of which is rotatably connected to the rotating shaft, and the other is fixedly connected to the rotating shaft; A linkage long rod, wherein two linkage long rods are provided below the second restraint plate and the first restraint plate adjacent to the second restraint plate, wherein one linkage long rod is rotatably connected to the rotating shaft, and the other linkage long rod is fixedly connected to the rotating shaft; A connecting shaft, the connecting shaft being used for rotational connection between the linkage long rods and between the linkage long rods and the linkage short rods; And a telescopic member fixedly installed on the bottom of the base plate, wherein the telescopic end of the telescopic member is fixedly connected to a restraining plate at one end thereof through a linkage frame.

6. The restraint tray for testing square-shell lithium batteries according to claim 5, characterized in that: The length of the linkage short rod is half of the length of the linkage long rod.

7. The restraint tray for testing square-shell lithium batteries according to claim 5, characterized in that: The cleaning mechanism comprises: Rotating tubes, wherein two groups of rotating tubes are rotatably mounted on the second restraint plate, and the two groups of rotating tubes are symmetrically arranged; A cleaning brush assembly, wherein the cleaning brush assembly is arranged on the rotating tube; An air guide box is fixedly mounted on the second restraint plate, and a through hole is provided on the side wall of the rotating tube, which is in communication with the air guide box, and the air guide box and the rotating tube are in rotational cooperation; Conduit 1, the conduit 1 is used for communication between the two groups of air guide boxes, and one group of air guide boxes is also provided with an air intake pipe; And a power module for driving the rotating tube to rotate and reset.

8. The restraint tray for testing square-shell lithium batteries according to claim 7, characterized in that: The cleaning component comprises: A rotating plate, the rotating plate is fixedly mounted on the rotating tube, and a plurality of compression cylinders are fixedly mounted on the rotating plate; A second spring is slidably mounted in the compression cylinder, a push tube is fixedly mounted on the second spring, a through hole is provided at the bottom of the compression cylinder for the push tube to pass through, and a circular hole is provided on the second spring that is in communication with the push tube; A second conduit, the second conduit being used for communicating between the top of the compression cylinder and the rotating tube, and the second conduit being rotationally connected to the rotating tube; A second piston for elastically pulling the second spring, wherein the second piston is disposed in the compression cylinder; An air jet plate is fixedly mounted on the bottom of the push tube, wherein the air jet plate has a cavity in communication with the push tube, and a spray hole in communication with the cavity is formed at the bottom of the air jet plate; and a brush bar, wherein the brush bar is arranged at the bottom of the jet plate.

9. The restraint tray for testing square-shell lithium batteries according to claim 7, characterized in that: The power module includes: A driving tube is slidably mounted on the bottom of the rotating tube. The rotating tube can rotate along with the driving tube. A piston 1 fixedly connected to the rotating tube is slidably mounted in the driving tube. The piston 1 has a circular hole connected to the rotating tube. A spring 1 for pushing the driving tube to press against the top of the restraining plate 2, wherein the spring is sleeved on the rotating tube; A protrusion is slidably mounted on the inner wall of the second restraint plate, the protrusion is rotationally engaged with the drive tube, and the protrusion can move along the length direction of the rotating tube with the drive tube; a return torsion spring sleeved on the drive tube, wherein one end of the return torsion spring is fixedly connected to the protrusion, and the other end of the return torsion spring is fixedly connected to the outer wall of the drive tube; A driving shaft rotatably mounted in the second restraint plate, wherein a driving block is fixedly mounted on the driving shaft, and a plurality of groups of protrusions are provided on the driving block; A driven block fixedly mounted on the bottom of the driving tube, wherein the bottom of the driven block is provided with a recessed hole for accommodating the protrusion; Rotating a transmission rod 2 installed in the restraint plate 2, wherein the transmission rod 2 is connected to the drive shaft via a transmission member; A transmission rod 1 is rotatably installed in the restraint plate 2, and a speed change gear set is provided between the transmission rod 1 and the rotating shaft and between the transmission rod 1 and the transmission rod 2.

10. A square shell lithium battery testing device, characterized in that: The invention comprises a restraint tray for testing square-shell lithium batteries according to any one of claims 1 to 9.

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