A battery cell electrode mechanical properties testing device

Abstract

The present application relates to the field of battery cell electrodes, and specifically discloses a battery cell electrode mechanical property testing device, including a rotating seat, a first driven gear is rotatably connected to the rotating seat, a bottom plate is coaxially connected to the first driven gear, a first motor for driving the first driven gear is arranged on the bottom plate, a first side plate and a rack bracket are arranged on one side of the bottom plate, a second rack is arranged on the rack bracket, the second rack is arc-shaped, a first fixed plate is arranged on the first side plate, two groups of first rollers are arranged on one side of the first fixed plate, a first rotating track is slidably connected between the first rollers, a toothed cover plate is fixed on one side of the first rotating track, a second driving gear is rotatably connected to the toothed cover plate, the second driving gear is meshed with the second rack, a second motor for driving the second driving gear to rotate is arranged on the bottom plate, a main mounting plate is arranged on one side of the toothed cover plate, and an upper clamping plate and a lower clamping plate are arranged on the main mounting plate. The present application has the effect of meeting the testing requirements of battery cell electrodes under multi-directional force conditions.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell electrodes, and in particular to a battery cell electrode mechanical property testing device. Background Art

[0002] The battery cell is the basic unit of lithium battery, and its internal structure includes positive and negative electrodes, separators and electrolytes. The electrodes of the battery cell are usually composed of active materials, conductive agents and binders, and are connected to the external circuit through poles.

[0003] Electrodes are not only key components for transmitting current, but also bear certain mechanical stresses during battery assembly and use. Their mechanical properties directly affect the overall performance and safety of the battery. For example, the volume of electrodes changes due to the insertion and extraction of lithium ions during battery charging and discharging. This change may cause microcracks or peeling of electrode materials, thus affecting the cycle life and reliability of the battery. Therefore, it is of great significance to accurately measure and evaluate the mechanical properties of battery cell electrodes.

[0004] Common mechanical properties testing equipment can usually only perform testing in a single direction. When samples need to undergo repeated push-pull and torque tests in multiple directions, frequent loading and unloading of samples not only makes the test cumbersome, but also increases the possibility of damage to the battery cell electrodes. Summary of the invention

[0005] In order to meet the testing requirements of battery cell electrodes under multi-directional force conditions, the present application provides a battery cell electrode mechanical properties testing device, which adopts the following technical solutions:

[0006] A battery cell electrode mechanical properties testing device comprises a swivel seat, the swivel seat is rotatably connected to a first driven gear, the first driven gear is coaxially fixedly connected to a bottom plate, the bottom plate is provided with a first motor for driving the first driven gear to rotate, a first side plate and a rack bracket are provided on one side of the bottom plate, the rack bracket is connected to a second rack, the second rack is arc-shaped, a first fixed block is provided on the first side plate, two groups of first rollers are provided on the side of the first fixed block facing the second rack, a first rotating track is slidably connected between the two groups of the first rollers, a tooth surface cover plate is fixed on the side of the first rotating track facing the second rack, a second driving gear is rotatably connected on the tooth surface cover plate, the second driving gear is meshed with the second rack, a second motor for driving the second driving gear to rotate is provided on the bottom plate, a main mounting plate is fixed on one side of the tooth surface cover plate, and an upper clamping plate and a lower clamping plate are provided on the main mounting plate.

[0007] By adopting the above technical solution, when the mechanical properties of the battery cell electrode need to be tested, the test sample is placed between the upper clamping plate and the lower clamping plate. After the first test is completed, the first motor can be started to rotate the sample on the z-axis, or the second motor can be started to rotate the sample on the x-axis.

[0008] When the first motor is started, the first driven gear rotates under the drive of the first motor, thereby driving the bottom plate to rotate, and the sample rotates accordingly; when the second motor is started, the second driving gear rotates with the second motor, and since the second driving gear is meshed with the second rack, and the second rack is fixed on the rack bracket, the second driving gear moves along the second rack, driving the first rotating track to slide between the first rollers, and the tooth surface cover plate and the main mounting plate rotate accordingly, thereby realizing the rotation of the sample on the x-axis;

[0009] After completing the rotation of the sample, the mechanical properties test in other directions can be continued, meeting the testing requirements of the battery cell electrodes under multi-directional force conditions.

[0010] Optionally, a second lead screw is provided at the bottom of the swivel seat, a first threaded block is threadedly connected to the second lead screw, a first sliding block is provided on the first threaded block, the first sliding block is slidably connected to the second lead screw, and the swivel seat is located on the first sliding block.

[0011] By adopting the above technical solution, the setting of the second lead screw enables the position of the sample in the horizontal direction to be adjusted, further improving the convenience of testing the mechanical properties of the battery cell electrode.

[0012] Optionally, a first screw is provided on one side of the second screw, a third threaded block is threadedly connected to the first screw, a third sliding block is provided on the third threaded block, the third sliding block is slidably connected to the first screw, an electric cylinder is provided on the third sliding block, and a test assembly is connected to one end of the electric cylinder.

[0013] Optionally, the third sliding block is provided with a fourth lead screw, the fourth lead screw is threadedly connected with a fifth sliding block, the fifth sliding block is slidably connected to the fourth lead screw, and the electric cylinder is connected to the fifth sliding block.

[0014] By adopting the above technical solution, the first lead screw is used to control the horizontal position of the test assembly, and the fourth lead screw is used to adjust the height of the test assembly to match the position of the sample, thereby further improving the convenience of testing the mechanical properties of the battery cell electrode.

[0015] Optionally, a sample connection assembly is provided on the side of the test assembly away from the electric cylinder, and the sample connection assembly includes a motor mounting box, a fourth motor, an upper connecting block, a lower connecting block, a spring end rod and a key rod. The fourth motor is slidably connected in the motor mounting box, and the output shaft of the fourth motor passes through the upper connecting block and the lower connecting block, and is threadedly connected to the upper connecting block and the lower connecting block. One end of the spring end rod is connected to the upper connecting rod, and the other end of the spring end rod is connected to the test assembly, and the key rod is connected to the lower connecting block.

[0016] Optionally, a spring sheet is provided on a side of the lower connecting block away from the upper connecting block, the lower connecting block is connected to the spring sheet via a torsion spring, and the output shaft of the fourth motor is threadedly connected to the spring sheet.

[0017] By adopting the above technical solution, during testing, the position of the sample is aligned with the position of the sample connecting assembly. After the connection between the sample and the key rod is completed, the fourth motor is started, and the upper connecting block, the lower connecting block and the spring are fixed through the output shaft of the fourth motor, thereby fixing the position of the sample and the test assembly.

[0018] Optionally, a fastening assembly is provided on the main mounting plate, and the fastening assembly includes a third motor, a third driving gear, a third driven gear, a gear rod, a third linkage gear and a third rack, the third motor is coaxially connected to the third driving gear, the third driven gear is coaxially connected to the gear rod, the third driven gear is meshed with the third driving gear, the third linkage gear is coaxially connected to the gear rod, the third rack is meshed with the third linkage gear, the third rack passes through the lower clamp plate and the upper clamp plate, and one end of the third rack is connected to the upper clamp plate.

[0019] By adopting the above technical solution, after the sample is placed on the lower clamping plate, the third motor is started, the third driving gear rotates under the drive of the third motor, and the third driven gear rotates accordingly, thereby driving the gear rod to rotate, and the third rack moves under the drive of the third linkage gear, thereby driving the upper clamping plate to approach the lower clamping plate, thereby clamping the sample.

[0020] Optionally, a third screw is provided on the main mounting plate, a second threaded block is rotatably connected to the third screw, a second sliding block is provided on the second threaded block, the second sliding block is slidably connected to the third screw, a push rod is provided on the second sliding block, a connecting groove is opened on the lower clamping plate, and the push rod is located in the connecting groove.

[0021] Optionally, a heightening strip is provided on one side of the lower clamping plate, and the length direction of the heightening strip is perpendicular to the moving direction of the second threaded block.

[0022] By adopting the above technical solution, after the sample is placed on the lower clamping plate, the third screw is started, and the second sliding block moves along the third screw driven by the second threaded block, driving the push rod to move. Under the action of the push rod, the position of the sample in the horizontal direction is fixed.

[0023] Optionally, a second side plate is provided on the side of the base plate away from the first side plate, a smooth cover plate is provided on the side of the main mounting plate away from the toothed cover plate, a second fixed block is provided on the second side plate, two groups of second rollers are provided on the side of the second fixed block facing the smooth cover plate, the two groups of second rollers are directly slidably connected with a second rotating track, and the second rotating track is fixed to one side of the smooth cover plate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When the mechanical properties of the battery cell electrode need to be tested, the test sample is placed between the upper clamping plate and the lower clamping plate. After the first test is completed, the first motor can be started to rotate the sample on the z-axis, or the second motor can be started to rotate the sample on the x-axis;

[0026] When the first motor is started, the first driven gear rotates under the drive of the first motor, thereby driving the bottom plate to rotate, and the sample rotates accordingly; when the second motor is started, the second driving gear rotates with the second motor, and since the second driving gear is meshed with the second rack, and the second rack is fixed on the rack bracket, the second driving gear moves along the second rack, driving the first rotating track to slide between the first rollers, and the tooth surface cover plate and the main mounting plate rotate accordingly, thereby realizing the rotation of the sample on the x-axis;

[0027] After the sample is rotated, the mechanical properties test in other directions can be continued, meeting the testing requirements of the battery cell electrodes under multi-directional force conditions;

[0028] 2. During the test, align the position of the sample with the position of the sample connection assembly. After the connection between the sample and the key rod is completed, start the fourth motor, and fix the upper connection block, the lower connection block and the spring piece through the output shaft of the fourth motor, thereby fixing the position of the sample and the test assembly;

[0029] 3. After placing the sample on the lower clamping plate, start the third motor, the third driving gear rotates under the drive of the third motor, and the third driven gear rotates accordingly, thereby driving the gear rod to rotate, and the third rack moves under the drive of the third linkage gear, thereby driving the upper clamping plate to approach the lower clamping plate to achieve clamping of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a battery cell electrode mechanical properties testing device in an embodiment of the present application.

[0031] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0032] Figure 3 It is a schematic diagram for illustrating the structure of the swivel seat and the components above the swivel seat in the embodiment of the present application.

[0033] Figure 4 yes Figure 3 Schematic diagram of the structure after the baffle is hidden.

[0034] Figure 5 It is a schematic diagram of the structure of the second rotating component in the embodiment of the present application.

[0035] Figure 6 It is a schematic diagram of the structure of the components between the upper clamping plate and the main mounting plate in the embodiment of the present application.

[0036] Figure 7 yes Figure 6 Schematic diagram of the structure after the upper splint is hidden.

[0037] Figure 8 yes Figure 7 Schematic diagram of the structure after the lower splint is hidden.

[0038] Fig. 9 It is a schematic diagram of the structure of the first lead screw and the components above the first lead screw in the embodiment of the present application.

[0039] Fig.10 It is a structural schematic diagram used to reflect the positional relationship between the fourth lead screw and the rib plate and the spine plate in the embodiment of the present application.

[0040] Fig.11 It is a schematic diagram of the structure of the sample connection component in the embodiment of the present application.

[0041] Description of the accompanying drawings: 1, workbench; 2, display box; 3, first lead screw; 4, second lead screw; 5, first sliding block; 6, first threaded block; 7, swivel seat; 8, first driven gear; 9, bottom plate; 10, first side plate; 11, second side plate; 12, baffle plate; 13, back plate; 14, first reducer; 15, first motor; 16, first driving gear; 17, rotation limit block; 18, rack bracket; 19, bracket groove; 20, second rack; 21, second motor; 22, second reducer; 2 3. Second driving gear; 24. Tooth surface cover plate; 25. Accommodating groove; 26. Connecting plate; 27. First rotating track; 28. Side plate groove; 29. ​​First fixing block; 30. First roller; 31. Smooth surface cover plate; 32. Second rotating track; 33. Side groove; 34. Second fixing block; 35. Second roller; 36. Smooth surface shielding plate; 37. Main mounting plate; 38. First mounting frame; 39. Second mounting frame; 40. Limiting plate; 41. Upper clamping plate; 42. Lower clamping plate; 43. Third lead screw; 44. Push plate; 45, push rod; 46, pressure strip; 47, second sliding block; 48, second threaded block; 49, connecting groove; 50, heightening strip; 51, third reducer; 52, third motor; 53, third driving gear; 54, third driven gear; 55, gear rod; 56, third linkage gear; 57, third rack; 58, third mounting plate; 59, connecting column; 60, flange; 61, third sliding block; 62, third threaded block; 63, fixing plate; 64, fourth lead screw; 65, rib plate; 66 , spine plate; 67, sliding track; 68, fourth sliding block; 69, magnetic plate; 70, electromagnet; 71, peak plate; 72, reinforcement plate; 73, fifth sliding block; 74, fifth threaded block; 75, electric cylinder plate; 76, electric cylinder; 77, pull pressure sensor; 78, motor mounting box; 79, fourth motor; 80, upper connecting block; 81, lower connecting block; 82, spring piece; 83, spring end rod; 84, key rod; 85, motor slide groove; 86, motor slider; 87, upper connecting part; 88, lower connecting part. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-11 This application is described in further detail.

[0043] Example 1

[0044] The embodiment of the present application discloses a device for testing the mechanical properties of a battery cell electrode.

[0045] Reference Figure 1A battery cell electrode mechanical property testing device includes a workbench 1, on which a display box 2 is provided, and the display box 2 is fixedly connected to a corner of the workbench 1. A first lead screw 3 is provided on one side of the display box 2, and the first lead screw 3 is fixed to the workbench 1 by bolts, one end of the first lead screw 3 is located at the edge of the workbench 1, and two second lead screws 4 are provided at the other end of the first lead screw 3. The two second lead screws 4 are arranged in parallel, the second lead screw 4 is perpendicular to the first lead screw 3, both ends of the second lead screw 4 are located at the edge of the workbench 1, and the second lead screw 4 is fixed to the workbench 1 by bolts.

[0046] Reference Figure 1 and Figure 2 , two first sliding blocks 5 are provided on each second lead screw 4, and both sides of the first sliding block 5 are slidably connected to the second lead screw 4. A first threaded block 6 is fixedly connected to the bottom of the first sliding block 5, and the first threaded block 6 is threadedly connected to the second lead screw 4. A swivel seat 7 is provided on the second lead screw 4, and the swivel seat 7 is fixed to the top of the first sliding block 5 by bolts (not shown in the figure), and the first sliding blocks 5 are located at the four corners of the swivel seat 7.

[0047] Reference Figure 3 and Figure 4 , a first driven gear 8 is rotatably connected to the rotating seat 7, the first driven gear 8 is coaxially arranged with the rotating seat 7, and a bottom plate 9 is fixedly connected to the first driven gear 8 by bolts (not shown in the figure). A first side plate 10 is provided on one side of the bottom plate 9, the first side plate 10 is perpendicularly arranged with the bottom plate 9, and the first side plate 10 and the bottom plate 9 are integrally formed. A second side plate 11 is provided on the side of the bottom plate 9 away from the first side plate 10, the second side plate 11 is parallelly arranged with the first side plate 10, and the second side plate 11 is integrally formed with the bottom plate 9. A baffle plate 12 and a back plate 13 are provided between the first side plate 10 and the second side plate 11, the baffle plate 12 is perpendicularly arranged with the first side plate 10, one side of the baffle plate 12 is connected with the first side plate 10 by bolts (not shown in the figure), the other side of the baffle plate 12 is connected with the second side plate 11 by bolts, and the bottom of the baffle plate 12 is fixed to the bottom plate 9 by bolts. The back plate 13 is located on the side of the bottom plate 9 away from the baffle 12 , one side of the back plate 13 is connected to the first side plate 10 by bolts, the other side of the back plate 13 is connected to the second side plate 11 by bolts, and the bottom of the back plate 13 is fixed to the bottom plate 9 by bolts.

[0048] Reference Figure 3 and Figure 4, a first reducer 14 and a first motor 15 are provided on the bottom plate 9. The first reducer 14 is fixed to a corner of the bottom plate 9 by bolts (not shown in the figure), and the first motor 15 is fixedly connected to the top of the first reducer 14. The output shaft of the first motor 15 is coaxially connected to the input shaft of the first reducer 14, and the output shaft of the first reducer 14 passes through the bottom plate 9. A first driving gear 16 is coaxially fixedly connected to the output shaft of the first reducer 14. The first driving gear 16 is located below the bottom plate 9. There is a gap between the first driving gear 16 and the rotating seat 7. The edge of the first driving gear 16 is located outside the rotating seat 7, and the first driving gear 16 is meshed with the first driven gear 8. The first motor 15, the first reducer 14, the first driving gear 16 and the first driven gear 8 constitute a first rotating assembly, which is used to control the rotation of the sample on the z-axis.

[0049] Reference Figure 4 Two rotation limit blocks 17 are provided on the rotating seat 7, and the rotation limit blocks 17 are fixedly connected to the edge of the rotating seat 7. One rotation limit block 17 is located on the side of the rotating seat 7 close to the second side plate 11, and the other rotation limit block 17 is located on the side of the rotating seat 7 close to the first side plate 10. Both rotation limit blocks 17 are located on the side of the rotating seat 7 close to the baffle 12.

[0050] Reference Figure 4 and Figure 5 The bottom plate 9 is provided with a rack bracket 18, which is located on the side of the bottom plate 9 close to the first side plate 10, and is arranged parallel to the first side plate 10, and is fixedly connected to the bottom plate 9. A bracket groove 19 is provided at the top of the rack bracket 18, and the longitudinal section of the bracket groove 19 is semicircular, and the bracket groove 19 passes through the rack bracket 18 along its axis, and the top edge of the bracket groove 19 is flush with the top of the rack bracket 18.

[0051] Reference Figure 4 and Figure 5 A second rack 20 is provided on one side of the rack bracket 18 close to the first side plate 10, and the second rack 20 is fixed to the rack bracket 18 by bolts (not shown in the figure). The second rack 20 is semicircular, and the tooth surface of the second rack 20 is located inside the bracket groove 19, and the axis of the second rack 20 coincides with the axis of the bracket groove 19.

[0052] Reference Figure 4A second motor 21 and a second reducer 22 are provided on the bottom plate 9, and the second motor 21 and the second reducer 22 are located between the rack bracket 18 and the second side plate 11. The output shaft of the second motor 21 is coaxially connected to the input shaft of the second reducer 22, and the output shaft of the second reducer 22 passes through the bracket slot 19. A second driving gear 23 is coaxially fixedly connected to the output shaft of the second reducer 22, and the second driving gear 23 is meshed with the second rack 20. The second motor 21, the second reducer 22, the second driving gear 23 and the second rack 20 constitute a second rotating assembly for controlling the rotation of the sample on the x-axis.

[0053] Reference Figure 4 and Figure 5 The second driving gear 23 is provided with a tooth surface cover plate 24, which is vertically arranged, and has a semicircular edge. The tooth surface cover plate 24 is located in the second rack 20, and there is a gap between the side wall of the tooth surface cover plate 24 and the tooth surface of the second rack 20. The tooth surface cover plate 24 is provided with a receiving groove 25, which penetrates the tooth surface cover plate 24 along the axial direction of the second driving gear 23, and the second driving gear 23 is located in the receiving groove 25. A connecting plate 26 is fixed to the side of the tooth surface cover plate 24 away from the rack bracket 18 by bolts (not shown in the figure), and the second driving gear 23 is rotatably connected to the connecting plate 26.

[0054] Reference Figure 5 A first rotating track 27 is provided on the side of the tooth surface cover plate 24 close to the first side plate 10. The first rotating track 27 is semicircular. The first rotating track 27 is located at the edge of the tooth surface cover plate 24. The first rotating track 27 is coaxially arranged with the tooth surface cover plate 24. The first rotating track 27 is fixedly connected to the side wall of the tooth surface cover plate 24.

[0055] Reference Figure 5 , a side plate groove 28 is provided on the first side plate 10, the side plate groove 28 opens upward, the longitudinal section of the side plate groove 28 is semicircular, and the side plate groove 28 penetrates the first side plate 10 along its axial direction. A plurality of first fixing blocks 29 are provided on the side of the first side plate 10 facing the tooth surface cover plate 24, and the first fixing blocks 29 are connected to the first side plate 10 by bolts (not shown in the figure). In this embodiment, the number of the first fixing blocks 29 is four, and the four first fixing blocks 29 are arranged around the edge of the side plate groove 28, and the distance between two adjacent first fixing blocks 29 is equal. Each first fixing block 29 is rotatably connected to four first rollers 30 on the side away from the first side plate 10, and the first rollers 30 are slidably connected to the first rotating track 27. Among the four first rollers 30 located on the same first fixing block 29, two first rollers 30 are located on the same side of the first rotating track 27, and the other two first rollers 30 are located on the other side of the first rotating track 27.

[0056] Reference Figure 4 and Figure 5 A smooth cover plate 31 is provided on the side of the second side plate 11 facing the first side plate 10. The smooth cover plate 31 is symmetrically arranged with the toothed cover plate 24, and the edge of the smooth cover plate 31 is semicircular. A second rotating track 32 is provided on the side of the smooth cover plate 31 close to the second side plate 11. The second rotating track 32 is semicircular and located at the edge of the smooth cover plate 31. The second rotating track 32 is coaxially arranged with the smooth cover plate 31 and is fixedly connected to the side wall of the smooth cover plate 31.

[0057] Reference Figure 4 and Figure 5 , a side groove 33 is provided on the second side plate 11, the side groove 33 opens upward, the longitudinal section of the side groove 33 is semicircular, and the side groove 33 passes through the second side plate 11 along its axial direction. A plurality of second fixing blocks 34 are provided on the side of the second side plate 11 facing the smooth cover plate 31, and the second fixing blocks 34 are connected to the second side plate 11 by bolts (not shown in the figure). In this embodiment, the number of the second fixing blocks 34 is four, and the four second fixing blocks 34 are arranged around the edge of the side groove 33, and the intervals between two adjacent second fixing blocks 34 are equal. Each second fixing block 34 is rotatably connected to four second rollers 35 on the side away from the second side plate 11, and the second rollers 35 are slidably connected to the second rotating track 32. Among the four second rollers 35 located on the same second fixing block 34, two second rollers 35 are located on the same side of the second rotating track 32, and the other two second rollers 35 are located on the other side of the second rotating track 32.

[0058] Reference Figure 5 A smooth shielding plate 36 is disposed in the side groove 33 , and the edge of the smooth shielding plate 36 is arc-shaped. The smooth shielding plate 36 is fixed to the second side plate 11 by bolts (not shown in the figure).

[0059] Reference Figure 4 and Figure 5 A main mounting plate 37 is provided between the toothed cover plate 24 and the smooth cover plate 31. The main mounting plate 37 is arranged parallel to the bottom plate 9. One side of the main mounting plate 37 is fixed to the toothed cover plate 24 by bolts (not shown in the figure), and the other side of the main mounting plate 37 is connected to the smooth cover plate 31 by bolts. A first mounting frame 38 and a second mounting frame 39 are provided below the main mounting plate 37. The first mounting frame 38 and the second mounting frame 39 are both fixed to the bottom of the main mounting plate 37 by bolts (not shown in the figure). The first mounting frame 38 and the second mounting frame 39 are arranged vertically, the second motor 21 passes through the first mounting frame 38, and the output shaft of the second reducer 22 passes through the second mounting frame 39.

[0060] Reference Figure 4A limit plate 40 is provided on the bottom plate 9, the limit plate 40 is vertically arranged, the bottom of the limit plate 40 is fixed to the bottom plate 9 by bolts (not shown in the figure), and the top of the limit plate 40 is in conflict with the main mounting plate 37. Under the action of the limit plate 40, the direction and angle of rotation of the sample on the x-axis are limited.

[0061] Reference Figure 6 and Figure 7 A clamping assembly is provided above the main mounting plate 37, and the clamping assembly includes an upper clamping plate 41, a lower clamping plate 42, a third lead screw 43, a push plate 44, a push rod 45 and a pressure strip 46. The lower clamping plate 42 is arranged parallel to the main mounting plate 37, one side of the lower clamping plate 42 is fixed to the toothed cover plate 24 by bolts (not shown in the figure), and the other side of the lower clamping plate 42 is connected to the smooth cover plate 31 by bolts. The upper clamping plate 41 is located above the lower clamping plate 42, and there is a gap between the upper clamping plate 41 and the lower clamping plate 42.

[0062] Reference Figure 7 and Figure 8 The third lead screw 43 is located between the main mounting plate 37 and the lower clamping plate 42, and the third lead screw 43 is fixed to the main mounting plate 37 by bolts (not shown in the figure). The third lead screw 43 is provided with a second sliding block 47, and both sides of the second sliding block 47 are slidably connected to the third lead screw 43. The bottom of the second sliding block 47 is fixedly connected with a second threaded block 48, and the second threaded block 48 is threadedly connected to the third lead screw 43.

[0063] Reference Figure 7 and Figure 8 The push plate 44 is fixed to the top of the second sliding block 47 by bolts (not shown in the figure), and the length direction of the push plate 44 is perpendicular to the moving direction of the second sliding block 47. The pressure strip 46 and the push rod 45 are located at the top of the push plate 44, and the length direction of the pressure strip 46 is parallel to the length direction of the push plate 44. One end of the pressure strip 46 is slidably connected to one side of the lower clamping plate 42, and the other end of the pressure strip 46 is slidably connected to the other side of the lower clamping plate 42, and the bottom of the pressure strip 46 is in contact with the top of the lower clamping plate 42. The push rod 45 is located on one side of the pressure strip 46, and one side of the pressure strip 45 is connected to the pressure strip 46 by bolts (not shown in the figure), and the bottom plate 9 of the push rod 45 is fixed to the push plate 44 by bolts.

[0064] Reference Figure 7 The lower clamping plate 42 is provided with a connecting groove 49, which is a through groove in the vertical direction. The second sliding block 47 is located below the connecting groove 49, and the push plate 44 and the push rod 45 are both located in the connecting groove 49. Both sides of the lower clamping plate 42 are provided with heightening strips 50, which are located at the top of the lower clamping plate 42, and the length direction of the heightening strips 50 is parallel to the length direction of the pressure strip 46. The top of the heightening strip 50 is flush with the top of the pressure strip 46, and the edge of the heightening strip 50 is flush with the edge of the lower clamping plate 42, and the heightening strip 50 and the lower clamping plate 42 are integrally formed.

[0065] Reference Figure 6 and Figure 8 , two fastening assemblies are arranged on the main mounting plate 37, and the fastening assemblies are symmetrically arranged on both sides of the third lead screw 43. The fastening assembly includes a third reducer 51, a third motor 52, a third driving gear 53, a third driven gear 54, a gear rod 55, two third linkage gears 56 and two third racks 57. Two third mounting plates 58 are arranged between the lower clamping plate 42 and the main mounting plate 37, and the third mounting plates 58 are symmetrically arranged on both sides of the third lead screw 43. The third mounting plates 58 are fixed to the bottom of the lower clamping plate 42 by bolts (not shown in the figure).

[0066] Reference Figure 6 and Figure 8 , the third motor 52 is fixed to the main mounting plate 37 by bolts (not shown in the figure), and the third reducer 51 is fixed to the bottom of the third mounting plate 58 by bolts (not shown in the figure). The output shaft of the third motor 52 is coaxially connected to the input shaft of the third reducer 51, and the output shaft of the third reducer 51 is coaxially fixedly connected to the third driving gear 53. The gear rod 55 is located on the side of the third driving gear 53 away from the third lead screw 43, and the gear rod 55 is vertically arranged with the pressure strip 46. A plurality of connecting columns 59 are sleeved on the gear rod 55, and the connecting columns 59 are "T" shaped. The bottom of the connecting column 59 is fixedly connected to the main mounting plate 37, and the top of the connecting column 59 is fixed to the bottom of the lower clamping plate 42 by bolts (not shown in the figure).

[0067] Reference Figure 8 The third driven gear 54 is sleeved on the gear rod 55, the gear rod 55 is coaxially fixedly connected with the third driven gear 54, and the third driven gear 54 is meshed with the third driving gear 53. The third linkage gear 56 is sleeved on both ends of the gear rod 55, and the gear rod 55 is coaxially fixedly connected with the third linkage gear 56.

[0068] Reference Figure 6 and Figure 8 A third rack 57 is provided on one side of each third linkage gear 56 close to the third lead screw 43. The third rack 57 is a cylinder. The third rack 57 is vertically arranged. The tooth surface of the third rack 57 meshes with the third linkage gear 56. The third rack 57 is located on both sides of the main mounting plate 37. The top of the third rack 57 penetrates the lower clamping plate 42 and the upper clamping plate 41. A flange 60 is provided on the top of the third rack 57. The flange 60 is integrally formed with the third rack 57. The flange 60 is fixed to the top of the upper clamping plate 41 by bolts (not shown in the figure).

[0069] Reference Fig. 9 and Fig.10, a third sliding block 61 is provided on the first lead screw 3, and both sides of the third sliding block 61 are slidably connected to the first lead screw 3. A third threaded block 62 is fixedly connected to the bottom of the third sliding block 61, and the third threaded block 62 is threadedly connected to the first lead screw 3. A fixing plate 63 is fixedly connected to the third sliding block 61, and a fourth lead screw 64 is provided on the fixing plate 63. The fourth lead screw 64 is vertically arranged and fixedly connected to the fixing plate 63. A plurality of ribs 65 are provided on the side of the fourth lead screw 64 away from the output shaft of the fourth lead screw 64. The ribs 65 are arranged in sequence along the vertical direction, and the intervals between two adjacent ribs 65 are equal. The ribs 65 are fixed to the fourth lead screw 64 by bolts. A ridge plate 66 is provided on one side of the fourth lead screw 64, and the ridge plate 66 is vertically arranged. One side of the ridge plate 66 is fixedly connected to each rib plate 65, and the bottom of the ridge plate 66 is fixedly connected to the fixing plate 63.

[0070] Reference Fig. 9 and Fig.10 , sliding rails 67 are provided on both sides of the first lead screw 3, and the sliding rails 67 are fixed to the workbench 1 by bolts (not shown in the figure). The length direction of the sliding rail 67 is set parallel to the moving direction of the third sliding block 61. A fourth sliding block 68 is slidably connected to the sliding rail 67, and a magnetic plate 69 is fixedly connected to the fourth sliding block 68. An electromagnet 70 is adsorbed on the bottom of the magnetic plate 69, and the electromagnet 70 is located between the fourth sliding block 68 and the first lead screw 3. A peak plate 71 is fixed to the top of the fourth lead screw 64 by bolts (not shown in the figure), and the motor of the fourth lead screw 64 passes through the peak plate 71. Reinforcement plates 72 are fixedly connected to both sides of the peak plate 71, and the reinforcement plates 72 are inclined. The bottom of the reinforcement plate 72 is fixedly connected to the top of the magnetic plate 69.

[0071] Reference Fig.10 , a fifth sliding block 73 is provided on the fourth lead screw 64, and both sides of the fifth sliding block 73 are slidably connected to the fourth lead screw 64. A fifth threaded block 74 is fixedly connected to the side of the fifth sliding block 73 close to the fourth lead screw 64, and the fifth threaded block 74 is threadedly connected to the fourth lead screw 64. An electric cylinder plate 75 is fixed to the side of the fifth sliding block 73 away from the fourth lead screw 64 by bolts (not shown in the figure), and an electric cylinder 76 is fixed to the side of the electric cylinder plate 75 away from the fourth lead screw 64 by bolts (not shown in the figure). The electric cylinder 76 is arranged horizontally, and the length direction of the electric cylinder 76 is parallel to the length direction of the sliding track 67. A test assembly is provided at one end of the electric cylinder 76 away from the electric cylinder plate 75.

[0072] Reference Fig.10 In this embodiment, the test component is a tension pressure sensor 77, and the output end of the electric cylinder 76 is connected to one side of the tension pressure sensor 77. In other embodiments, the tension pressure sensor 77 can also be replaced by other mechanical testing instruments, such as a torque sensor.

[0073] Reference Fig.10 and Fig.11 A sample connection assembly is provided on the side of the pull pressure sensor 77 away from the electric cylinder 76, and the sample connection assembly includes a motor mounting box 78, a fourth motor 79, an upper connection block 80, a lower connection block 81, a spring 82, a spring end rod 83 and a key rod 84. The fourth motor 79 is located in the motor mounting box 78, and motor slide grooves 85 are provided on both sides of the motor mounting box 78. Motor sliders 86 are fixedly connected to both sides of the fourth motor 79, and the motor sliders 86 are slidably connected in the motor slide grooves 85.

[0074] Reference Fig.11 The upper connecting block 80 includes an upper connecting portion 87 and a lower connecting portion 88. The upper connecting portion 87 is located at the top of the lower connecting portion 88, and the upper connecting portion 87 and the lower connecting portion 88 are integrally formed. The top of the upper connecting portion 87 passes through the bottom of the motor mounting box 78, and the output shaft of the fourth motor 79 is threadedly connected to the upper connecting portion 87. The lower connecting portion 88 is vertically arranged, and the bottom of the lower connecting portion 88 is connected to one side of the spring 82 through a torsion spring. In a natural state, the spring 82 is vertically arranged under the action of the torsion spring. The output shaft of the fourth motor 79 passes through the upper connecting portion 87, and extends downward to be threadedly connected to the spring 82, so that the spring 82 is arranged horizontally.

[0075] Reference Fig.10 and Fig.11 The lower connecting block 81 is located between the upper connecting portion 87 and the spring sheet 82, and the lower connecting block 81 is threadedly connected to the output shaft of the fourth motor 79. The spring end rod 83 is located on the side of the lower connecting portion 88 away from the lower connecting block 81, one end of the spring end rod 83 is fixedly connected to the lower connecting portion 88, and the other end of the spring end rod 83 is threadedly connected to the side of the tension and pressure sensor 77 away from the electric cylinder 76. The key rod 84 is located on one side of the lower connecting block 81, one end of the key rod 84 is fixedly connected to the lower connecting block 81, and the other end of the key rod 84 is threaded.

[0076] The implementation principle of the mechanical property testing device of a battery cell electrode in the embodiment of the present application is as follows: when the mechanical property of the battery cell electrode needs to be tested, the third motor 52 is first started, the third driving gear 53 rotates under the drive of the third reducer 51, and the third driven gear 54 rotates accordingly, thereby driving the gear rod 55 to rotate, and the third rack 57 moves upward under the drive of the third linkage gear 56, thereby driving the upper clamping plate 41 to separate from the lower clamping plate 42. The test sample is placed on the lower clamping plate 42, so that the sample is close to the heightening strip 50 on the side away from the pressure strip 46, and the third lead screw 43 is started. The second sliding block 47 moves along the third lead screw 43 under the drive of the second threaded block 48, driving the push plate 44, the push rod 45 and the pressure strip 46 to move. Under the action of the push plate 44, the position of the sample in the horizontal direction is fixed. Then the third lead screw 43 is closed, the third motor 52 is reversed, and the upper clamping plate 41 moves downward under the drive of the third rack 57, thereby clamping the sample together with the lower clamping plate 42.

[0077] The position of the rotating seat 7 is adjusted by the second lead screw 4, and the position of the electric cylinder 76 is moved by the first lead screw 3 and the fourth lead screw 64, so that the position of the sample and the position of the sample connection assembly are aligned. A connecting rod with a threaded hole is made on the sample, which can be matched with the key rod 84. After the connection between the sample and the key rod 84 is completed, the fourth motor 79 is started, and the upper connecting block 80, the lower connecting block 81 and the spring 82 are fixed by the output shaft of the fourth motor 79, so as to fix the position of the sample and the test assembly.

[0078] After completing the mechanical property test in the current direction, the fourth motor 79 can be reversed first to separate the upper connecting block 80 from the lower connecting block 81, and then the first motor 15 can be started to rotate the sample on the z-axis, or the second motor 21 can be started to rotate the sample on the x-axis. When the first motor 15 is started, the first reducer 14 drives the first driving gear 16 to rotate, and the first driven gear 8 rotates accordingly, thereby driving the entire bottom plate 9 to rotate, and realizing the rotation of the sample on the z-axis. The rotation limit block 17 limits the rotation amplitude of the bottom plate 9. When the second motor 21 is started, the second driving gear 23 rotates under the drive of the second reducer 22. Since the second driving gear 23 is engaged with the second rack 20, and the second rack 20 is fixed on the rack bracket 18, the second driving gear 23 rotates along the second rack 20, and drives the connecting plate 26, the first rotating track 27, the tooth surface cover plate 24, the main mounting plate 37, etc. to rotate together. Since the first rotating track 27 is between the two sets of first rollers 30 on the first fixed block 29, the rotation trajectory of the sample is limited. The setting of the limiting plate 40 limits the rotation range of the sample on the x-axis.

[0079] The setting of the first rotating component and the second rotating component enables the sample to complete rotation on the x-axis and z-axis, so that the battery cell electrodes can be measured in multiple directions. The tension and pressure sensor 77 in the embodiment can also be replaced with testing components such as torque sensors, thereby realizing more mechanical performance testing functions and meeting the testing requirements of battery cell electrodes under multi-directional force conditions.

[0080] After completing the mechanical property test, the electric cylinder 76 is retracted through the fourth screw 64, and then the swivel seat 7 is moved to the edge of the workbench 1 through the second screw 4, and the third motor 52 is started to separate the upper clamping plate 41 and the lower clamping plate 42, so that the sample can be taken out and subsequent sample tests can be carried out.

[0081] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery cell electrode mechanical properties testing device, characterized in that: The invention comprises a rotating seat (7), a first driven gear (8) being rotatably connected to the rotating seat (7), a bottom plate (9) being coaxially fixedly connected to the first driven gear (8), a first motor (15) being provided on the bottom plate (9) for driving the first driven gear (8) to rotate, a first side plate (10) and a rack bracket (18) being provided on one side of the bottom plate (9), a second rack (20) being connected to the rack bracket (18), the second rack (20) being in an arc shape, a first fixing block (29) being provided on the first side plate (10), two groups of first rollers (30) being provided on the side of the first fixing block (29) facing the second rack (20), the two groups of first rollers A first rotating track (27) is slidably connected between the first rotating track (27) and the second rack (20); a toothed cover plate (24) is fixed on the side of the first rotating track (27) facing the second rack (20); a second driving gear (23) is rotatably connected to the toothed cover plate (24); the second driving gear (23) is meshed with the second rack (20); a second motor (21) for driving the second driving gear (23) to rotate is provided on the bottom plate (9); a main mounting plate (37) is fixed on one side of the toothed cover plate (24); an upper clamping plate (41) and a lower clamping plate (42) are provided on the main mounting plate (37); a second lead screw (4) is provided at the bottom of the rotating seat (7); the second lead screw (4 ) is threadedly connected to a first threaded block (6), the first threaded block (6) is provided with a first sliding block (5), the first sliding block (5) is slidably connected to the second lead screw (4), the swivel seat (7) is located on the first sliding block (5), a first lead screw (3) is provided on one side of the second lead screw (4), a third threaded block (62) is threadedly connected to the first lead screw (3), the third threaded block (62) is provided with a third sliding block (61), the third sliding block (61) is slidably connected to the first lead screw (3), an electric cylinder (76) is provided on the third sliding block (61), one end of the electric cylinder (76) is connected to a test assembly, the test assembly is away from A sample connection assembly is provided on one side of the electric cylinder (76), and the sample connection assembly includes a motor mounting box (78), a fourth motor (79), an upper connecting block (80), a lower connecting block (81), an elastic end rod (83) and a key rod (84). The fourth motor (79) is slidably connected in the motor mounting box (78), and the output shaft of the fourth motor (79) passes through the upper connecting block (80) and the lower connecting block (81), and is threadedly connected to the upper connecting block (80) and the lower connecting block (81). One end of the elastic end rod (83) is connected to the upper connecting rod, and the other end of the elastic end rod (83) is connected to the test assembly, and the key rod (84) is connected to the lower connecting block (81).

2. The battery cell electrode mechanical properties testing device according to claim 1, characterized in that: The third sliding block (61) is provided with a fourth lead screw (64), the fourth lead screw (64) is threadedly connected with a fifth sliding block (73), the fifth sliding block (73) is slidably connected to the fourth lead screw (64), and the electric cylinder (76) is connected to the fifth sliding block (73).

3. The battery cell electrode mechanical properties testing device according to claim 1, characterized in that: A spring sheet (82) is provided on a side of the lower connecting block (81) away from the upper connecting block (80); the lower connecting block (81) is connected to the spring sheet (82) via a torsion spring; and the output shaft of the fourth motor (79) is threadedly connected to the spring sheet (82).

4. The battery cell electrode mechanical properties testing device according to claim 1, characterized in that: The main mounting plate (37) is provided with a fastening assembly, which comprises a third motor (52), a third driving gear (53), a third driven gear (54), a gear rod (55), a third linkage gear (56) and a third rack (57). The third motor (52) is coaxially connected to the third driving gear (53), the third driven gear (54) is coaxially connected to the gear rod (55), the third driven gear (54) is meshed with the third driving gear (53), the third linkage gear (56) is coaxially connected to the gear rod (55), the third rack (57) is meshed with the third linkage gear (56), the third rack (57) passes through the lower clamping plate (42) and the upper clamping plate (41), and one end of the third rack (57) is connected to the upper clamping plate (41).

5. The battery cell electrode mechanical properties testing device according to claim 1, characterized in that: The main mounting plate (37) is provided with a third lead screw (43), the third lead screw (43) is rotatably connected to a second threaded block (48), the second threaded block (48) is provided with a second sliding block (47), the second sliding block (47) is slidably connected to the third lead screw (43), the second sliding block (47) is provided with a push rod (45), the lower clamping plate (42) is provided with a connecting groove (49), and the push rod (45) is located in the connecting groove (49).

6. The battery cell electrode mechanical properties testing device according to claim 5, characterized in that: A heightening strip (50) is provided on one side of the lower clamping plate (42), and the length direction of the heightening strip (50) is perpendicular to the moving direction of the second threaded block (48).

7. The battery cell electrode mechanical properties testing device according to claim 1, characterized in that: A second side plate (11) is provided on a side of the bottom plate (9) away from the first side plate (10); a smooth cover plate (31) is provided on a side of the main mounting plate (37) away from the toothed cover plate (24); a second fixing block (34) is provided on the second side plate (11); two groups of second rollers (35) are provided on a side of the second fixing block (34) facing the smooth cover plate (31); the two groups of second rollers (35) are directly slidably connected to a second rotating track (32); and the second rotating track (32) is fixed to one side of the smooth cover plate (31).

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