Battery cell deformation testing device

Abstract

The utility model provides a battery cell deformation testing device. The battery cell deformation testing device comprises a first moving mechanism, a charging mechanism, a rotating mechanism, a second moving mechanism, a deformation testing mechanism and a measuring mechanism, the first moving mechanism and the second moving mechanism are arranged in a crossed manner, a charging mechanism and a rotating mechanism are oppositely arranged on the first moving mechanism, a deformation testing mechanism is arranged on the second moving mechanism, and a measuring mechanism is arranged on the deformation testing mechanism. Through mutual cooperation of the first moving mechanism, the charging mechanism, the rotating mechanism, the second moving mechanism, the deformation testing mechanism and the measuring mechanism, deformation testing can be carried out on different angles of a tested cell.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a battery core deformation testing device. Background Art

[0002] A wire refers to a single electrochemical cell containing positive and negative electrodes, which is generally not used directly. It is different from a battery which contains a protection circuit and a casing and can be used directly. The composition of a lithium-ion secondary rechargeable battery is as follows: a cell + a protection circuit board. The rechargeable battery without the protection circuit board is the cell, which is the power storage part of the rechargeable battery. The quality of the cell directly determines the quality of the rechargeable battery.

[0003] After searching, it is found that the Chinese patent literature discloses a patent document with publication number CN218411066U, which discloses a battery cell deformation testing device, including an upper base plate, a marble platform is installed on the upper base plate, a first ball screw and a second ball screw are installed on both sides of the marble platform, one end of the first ball screw is installed on the top plate, and the other end passes through the upper base plate and is connected to the reducer, the reducer is installed at the bottom of the upper base plate, a motor is installed on the reducer, and an active synchronous wheel is connected to the first ball screw; one end of the second ball screw is installed on the top plate, and the other end passes through the upper base plate and is connected to the driven synchronous wheel, and a synchronous belt is connected between the active synchronous wheel and the driven synchronous wheel; the first ball screw and the second ball screw are connected to the upper base plate. A central connecting plate is connected between the screw rods, a force sensor is installed at the bottom of the central connecting plate, a pressure plate is installed at the bottom of the force sensor, and two grating rulers are installed at both ends of the central connecting plate; the patent discloses placing the battery cell on a marble platform, starting the motor, the motor drives the first ball screw to rotate, and the second ball screw is driven to rotate synchronously through the synchronous belt, the central connecting plate slides downward along the guide rod, driving the pressure plate to move until the pressure plate presses the battery cell, and the deformation test is started; during the deformation test, the battery cell can only be placed on a position on the marble platform for deformation testing, and the battery cell cannot be automatically rotated 90°, and the positions of the upper and lower front and rear surfaces are switched to perform multi-angle testing to obtain more comprehensive deformation test data. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to perform deformation tests on different angles of the tested battery cell.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] A battery cell deformation testing device comprises a first moving mechanism (2), a charging mechanism (3), a rotating mechanism (4), a second moving mechanism (5), a deformation testing mechanism (6), and a measuring mechanism (7); the first moving mechanism (2) and the second moving mechanism (5) are arranged crosswise, the first moving mechanism (2) is provided with a charging mechanism (3) and a rotating mechanism (4) in a relative manner, the second moving mechanism (5) is provided with a deformation testing mechanism (6), and the deformation testing mechanism (6) is provided with a measuring mechanism (7).

[0007] Beneficial effect: Through the cooperation of the first moving mechanism, the charging mechanism, the rotating mechanism, the second moving mechanism, the deformation testing mechanism and the measuring mechanism, deformation testing can be performed on different angles of the tested battery cell.

[0008] Furthermore, it also comprises a workbench (1), a first moving mechanism (2) fixedly connected along the X-axis on the top wall of the workbench (1), and a second moving mechanism (5) fixedly connected along the Y-axis in the middle of the first moving mechanism (2) on the top wall of the workbench (1).

[0009] Furthermore, the first moving mechanism (2) comprises a vertical plate (21), a first motor (22), a first bidirectional threaded rod (23), and a first slide seat (24); two vertical plates (21) are provided, and a first bidirectional threaded rod (23) is rotatably connected between the two vertical plates (21); a first motor (22) is fixedly connected to one of the vertical plates (21); an output shaft end of the first motor (22) is fixedly connected to the first bidirectional threaded rod (23); two first slide seats (24) are threadedly connected to the first bidirectional threaded rod (23); the two first slide seats (24) can move toward each other on the first bidirectional threaded rod (23); and the two first slide seats (24) are respectively provided with a charging mechanism (3) and a rotating mechanism (4).

[0010] Beneficial effect: Through the mutual cooperation of the first motor, the first bidirectional threaded rod and the first slide, when fixing the battery cell, the first motor drives the first bidirectional threaded rod to rotate, and the first bidirectional threaded rod drives the two first slides to approach each other, thereby driving the two mounting plates to approach each other, so that the charging mechanism and the rotating mechanism are respectively clamped on both sides of the battery cell, thereby completing the fixation of the battery cell.

[0011] Furthermore, the first moving mechanism (2) also includes a mounting plate, and the mounting plates are provided with two first mounting plates (251) and a second mounting plate (252), and the two mounting plates are respectively fixedly connected to the two first slide seats (24), and the first mounting plate (251) is provided with a charging mechanism (3), and the second mounting plate (252) is provided with a rotating mechanism (4).

[0012] Furthermore, a circular hole is provided on the first mounting plate (251), and the charging mechanism (3) comprises a first rotating disk (31), a fixed plate (32), a charging element (33), and an electrode sheet (34); the first rotating disk (31) is rotatably connected to the circular hole on the first mounting plate (251), the first rotating disk (31) is fixedly connected to the fixed plate (32) via a connecting column (311), the charging element (33) is fixedly connected to the fixed plate (32), a plurality of electrode sheets (34) are fixedly connected to a side of the first rotating disk (31) away from the charging element (33), the charging element (33) and the electrode sheet (34) are electrically connected, and a clamping frame (9) is fixedly provided on the first rotating disk (31) at the periphery of the electrode sheet (34).

[0013] Beneficial effect: through the mutual cooperation of the first turntable, the fixed plate, the charging element and the electrode sheet, after the tested battery cell is placed in the clamping frame, the electrode sheet on the first turntable contacts with the conductive connector on the battery cell. When performing the deformation test, the charging element charges the tested battery cell through the electrode sheet, and with the cooperation of the deformation testing mechanism, the squeezing force of the tested battery cell on the outside world after the battery cell size increases during the charging process is detected.

[0014] Furthermore, a circular hole is provided on the second mounting plate (252), and the rotating mechanism (4) comprises a second turntable (41) and a steering gear (42); the second turntable (41) is rotatably connected to the circular hole on the second mounting plate (252), the steering gear (42) is fixedly connected to the second turntable (41) through a supporting plate (421), an output end of the steering gear (42) is fixedly connected to the second turntable (41), and a clamping frame (9) is fixedly connected to a side of the second turntable (41) away from the steering gear (42); the clamping frames (9) on the first turntable (31) and the second turntable (41) are relatively flush.

[0015] Beneficial effect: through the cooperation between the second turntable and the servo, the servo drives the second turntable to rotate, the second turntable drives the clamping frame to rotate 90° and then stop, and the first turntable synchronously drives the clamping frame to rotate 90° and then stop, so that the battery cell is adjusted from a horizontal state to a vertical state, and then the deformation testing mechanism is moved to contact the upper and lower surfaces of the battery cell, and then a deformation test is performed; through the above settings, the test angle of the battery cell can be automatically adjusted, and the deformation test can be performed on the four surfaces of the front, back, upper and lower surfaces of the battery cell, thereby obtaining multiple groups of test data and analyzing more comprehensive deformation test results.

[0016] Furthermore, the second moving mechanism (5) comprises a mounting frame (51), a second motor (52), a second bidirectional threaded rod (53), a second slide seat (54), and a moving plate (55); the second motor (52) is fixedly connected to the vertical plate of the mounting frame (51), the second bidirectional threaded rod (53) is rotatably connected to the mounting frame (51), the output shaft end of the second motor (52) is fixedly connected to the second bidirectional threaded rod (53), the second bidirectional threaded rod (53) is threadedly connected to two second slide seats (54), the second slide seats (54) are slidably connected to the mounting frame (51), each of the second slide seats (54) is fixed with a moving plate (55), each of the moving plates (55) is provided with a deformation testing mechanism (6), and a measuring mechanism (7) is provided between one of the deformation testing mechanisms (6) and the horizontal plate of the mounting frame (51).

[0017] Beneficial effect: through the mutual cooperation of the second motor, the second bidirectional threaded rod, the second slide seat and the movable plate, after the tested battery cell is fixed, the second motor drives the second bidirectional threaded rod to rotate, thereby driving the two movable plates closer to each other through the two second slide seats, so that the deformation test mechanism contacts the front and rear sides of the tested battery cell, preparing for deformation testing.

[0018] Furthermore, the mounting frame (51) is arranged in an inverted U shape.

[0019] Furthermore, the deformation testing mechanism (6) comprises a telescopic rod (61), a spring (62), a pressure sensor (63), and a clamp (64); the movable plate (55) is fixedly connected to the pressure sensor (63) via the telescopic rod (61); the outer periphery of the telescopic rod (61) is sleeved with a spring (62); two ends of the spring (62) are respectively fixedly connected to the movable plate (55) and the pressure sensor (63); and the clamp (64) is fixedly connected to the pressure sensor (63).

[0020] Beneficial effect: Through the cooperation of the telescopic rod, the spring, the pressure sensor and the clamping plate, the tested battery cell is charged during the deformation test, and the pressure sensor detects the squeezing force on the outside world after the external dimensions of the battery cell increase during the charging process.

[0021] Furthermore, the measuring mechanism (7) comprises a scale grating (71), a reading head (72), and a connecting rod (73); the scale grating (71) is fixedly connected to the mounting frame (51); the reading head (72) is slidably connected to the scale grating (71); and the reading head (72) is fixedly connected to one of the clamping plates (64) via the connecting rod (73).

[0022] Beneficial effect: Through the cooperation of the scale grating, the reading head and the connecting rod, the tested battery cell is charged under a constant pressure, and the outer dimensions of the battery cell change, which will cause the telescopic rod to move, thereby driving the reading head to move, so that the scale grating can detect the change in the outer dimensions of the battery during the charging process, and the deformation is read by the reading head, which facilitates the observation and collection of deformation data.

[0023] The advantages of the utility model are:

[0024] The utility model can perform deformation tests on different angles of the tested battery cell by means of the mutual cooperation of the first moving mechanism, the charging mechanism, the rotating mechanism, the second moving mechanism, the deformation testing mechanism and the measuring mechanism.

[0025] The utility model cooperates with the first motor, the first bidirectional threaded rod and the first slide seat. When fixing the battery cell, the first motor drives the first bidirectional threaded rod to rotate, and the first bidirectional threaded rod drives the two first slide seats to approach each other, thereby driving the two mounting plates to approach each other, so that the charging mechanism and the rotating mechanism are respectively clamped on both sides of the battery cell, thereby completing the fixation of the battery cell.

[0026] The utility model uses the mutual cooperation of the first rotating disk, the fixing plate, the charging element and the electrode sheet. After the tested battery cell is placed in the clamping frame, the electrode sheet on the first rotating disk contacts the conductive connector on the battery cell. When the deformation test is performed, the charging element charges the tested battery cell through the electrode sheet, and with the cooperation of the deformation testing mechanism, the squeezing force of the tested battery cell on the outside world after the battery cell size increases during the charging process is detected.

[0027] The utility model cooperates with the second turntable and the steering gear, the steering gear drives the second turntable to rotate, the second turntable drives the clamping frame to rotate 90° and then stop, and the first turntable synchronously drives the clamping frame to rotate 90° and then stop, so that the battery cell is adjusted from a horizontal state to a vertical state, and then the deformation testing mechanism is moved to contact with the upper and lower surfaces of the battery cell, and then a deformation test is performed; through the above-mentioned arrangement, the test angle of the battery cell can be automatically adjusted, and deformation tests can be performed on the four surfaces of the front, back, upper and lower surfaces of the battery cell, thereby obtaining multiple groups of test data and analyzing more comprehensive deformation test results.

[0028] The utility model cooperates with the second motor, the second bidirectional threaded rod, the second slide seat and the movable plate. After the tested battery cell is fixed, the second motor drives the second bidirectional threaded rod to rotate, thereby driving the two movable plates closer to each other through the two second slide seats, so that the deformation testing mechanism contacts the front and rear sides of the tested battery cell, and prepares for the deformation test.

[0029] The utility model charges the tested battery cell through the cooperation of the telescopic rod, the spring, the pressure sensor and the clamping plate during the deformation test, and the pressure sensor detects the squeezing force exerted on the outside world by the battery cell after the outer dimensions become larger during the charging process.

[0030] The utility model charges the tested battery cell under constant pressure through the cooperation of the scale grating, the reading head and the connecting rod. The change of the outer dimensions of the battery cell will cause the telescopic rod to be displaced, thereby driving the reading head to move, so that the scale grating can detect the change of the outer dimensions of the battery during the charging process, and the deformation is read by the reading head, which is convenient for observing and collecting the deformation data. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a three-dimensional diagram of a cell deformation testing device according to a first embodiment of the utility model;

[0032] Figure 2 This is an assembly diagram of the first moving mechanism, the charging mechanism, and the rotating mechanism in the battery cell deformation testing device of the first embodiment of the utility model;

[0033] Figure 3 This is an assembly diagram from another perspective of the first moving mechanism, the charging mechanism, and the rotating mechanism in the battery cell deformation testing device of the first embodiment of the utility model;

[0034] Figure 4 This is an assembly diagram of the second moving mechanism, the deformation testing mechanism, and the measuring mechanism in the battery cell deformation testing device according to the first embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Embodiment 1

[0037] like Figure 1 As shown, this embodiment provides a battery cell deformation testing device, including a workbench 1, a first moving mechanism 2, a charging mechanism 3, a rotating mechanism 4, a second moving mechanism 5, a deformation testing mechanism 6, and a measuring mechanism 7;

[0038] like Figure 1As shown, a first moving mechanism 2 is fixedly connected to the top wall of the workbench 1 along the X-axis, a charging mechanism 3 and a rotating mechanism 4 are relatively arranged on the first moving mechanism 2, a second moving mechanism 5 is fixedly connected to the top wall of the workbench 1 along the Y-axis in the middle of the first moving mechanism 2, a deformation testing mechanism 6 is arranged on the second moving mechanism 5, and a measuring mechanism 7 is arranged on the deformation testing mechanism 6.

[0039] like Figure 1 , Figure 2 As shown, the first moving mechanism 2 includes a vertical plate 21, a first motor 22, a first bidirectional threaded rod 23, a first slide 24, and a mounting plate. Two vertical plates 21 are provided, which are fixedly connected to the workbench 1 along the X-axis. The first bidirectional threaded rod 23 is rotatably connected between the two vertical plates 21. The first motor 22 is fixedly connected to one of the vertical plates 21, and the output shaft end of the first motor 22 is fixedly connected to the first bidirectional threaded rod 23. Two first slides 24 are threadedly connected to the first bidirectional threaded rod 23, and the first slide 24 is slidably connected to the workbench 1; the mounting plate is provided with two first slides 24, which are respectively A mounting plate 251 and a second mounting plate 252 are respectively fixedly connected to the two first slides 24; circular holes are provided on the mounting plates, a charging mechanism 3 is provided on the first mounting plate 251, and a rotating mechanism 4 is provided on the second mounting plate 252; in the present embodiment, when fixing the battery cell, the first motor 22 drives the first bidirectional threaded rod 23 to rotate, and the first bidirectional threaded rod 23 drives the two first slides 24 to approach each other, thereby driving the two mounting plates to approach each other, so that the charging mechanism 3 and the rotating mechanism 4 are respectively clamped on both sides of the battery cell, thereby completing the fixation of the battery cell.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, the charging mechanism 3 includes a first turntable 31, a fixed plate 32, a charging element 33, and an electrode sheet 34; the first turntable 31 is rotatably connected to the circular hole on the first mounting plate 251, the first turntable 31 is fixedly connected to the fixed plate 32 through a connecting column 311, the charging element 33 is fixedly connected to the fixed plate 32, a plurality of electrode sheets 34 are fixedly connected to the side of the first turntable 31 away from the charging element 33, the charging element 33 is electrically connected to the electrode sheets 34, and a clamping frame 9 is fixed to the first turntable 31 at the periphery of the electrode sheets 34; in this embodiment, after the tested battery cell is placed in the clamping frame 9, the electrode sheet 34 on the first turntable 31 conflicts with the conductive connector on the battery cell, and when performing a deformation test, the charging element 33 charges the tested battery cell through the electrode sheet 34, and with the cooperation of the deformation testing mechanism 6, detects the squeezing force of the tested battery cell on the outside after the battery cell size increases during the charging process.

[0041] like Figure 1 , Figure 2As shown, the rotating mechanism 4 includes a second turntable 41 and a steering gear 42; the second turntable 41 is rotatably connected to the circular hole on the second mounting plate 252, the steering gear 42 is fixedly connected to the second turntable 41 through the support plate 421, the output end of the steering gear 42 is fixedly connected to the second turntable 41, and a clamping frame 9 is fixedly connected to the side of the second turntable 41 away from the steering gear 42; the first turntable 31 and the clamping frame 9 on the second turntable 41 are relatively flush arranged; in this embodiment, the steering gear 42 drives the second turntable 41 to rotate, the second turntable 41 drives the clamping frame 9 to rotate 90° and then stop, and the first turntable 31 synchronously drives the clamping frame 9 to rotate 90° and then stop, so that the battery cell is adjusted from a horizontal state to a vertical state, and then the deformation test mechanism 6 is moved to contact with the upper and lower surfaces of the battery cell, and then a deformation test is performed; through the above arrangement, the test angle of the battery cell can be automatically adjusted, and the deformation test can be performed on the front, back, upper and lower four surfaces of the battery cell, thereby obtaining multiple groups of test data and analyzing more comprehensive deformation test results.

[0042] like Figure 1 , Figure 2 , Figure 4 As shown, the second moving mechanism 5 includes a mounting frame 51, a second motor 52, a second bidirectional threaded rod 53, a second slide seat 54, and a moving plate 55; the mounting frame 51 is set in an inverted U shape, fixed on the workbench 1 along the Y axis, and the mounting frame 51 is located between the two vertical plates 21; the second motor 52 is fixedly connected to the vertical plate of the mounting frame 51, and the second bidirectional threaded rod 53 is rotatably connected to the mounting frame 51, the output shaft end of the second motor 52 is fixedly connected to the second bidirectional threaded rod 53, and the second bidirectional threaded rod 53 is threadedly connected to two second slide seats 54, and the second bidirectional threaded rod 53 is threadedly connected to the two second slide seats 54. The two slides 54 are slidably connected to the mounting frame 51, and a movable plate 55 is fixed on each second slide 54, and a deformation testing mechanism 6 is arranged on each movable plate 55, wherein a measuring mechanism 7 is arranged between one deformation testing mechanism 6 and the horizontal plate of the mounting frame 51; in the present embodiment, after the tested battery cell is fixed, the second motor 52 drives the second bidirectional threaded rod 53 to rotate, thereby driving the two movable plates 55 to approach each other through the two second slides 54, so that the deformation testing mechanism 6 contacts the front and rear sides of the tested battery cell, and prepares for the deformation test.

[0043] like Figure 1 , Figure 4 As shown, the deformation testing mechanism 6 includes a telescopic rod 61, a spring 62, a pressure sensor 63, and a clamping plate 64. The movable plate 55 is fixedly connected to the pressure sensor 63 through the telescopic rod 61. The outer periphery of the telescopic rod 61 is sleeved with a spring 62. The two ends of the spring 62 are respectively fixedly connected to the movable plate 55 and the pressure sensor 63. The clamping plate 64 is fixedly connected to the pressure sensor 63. In this embodiment, when performing a deformation test, the tested battery cell is charged, and the pressure sensor 63 detects the squeezing pressure on the outside world after the outer dimensions of the battery cell increase during charging.

[0044] like Figure 1 , Figure 4 As shown, the measuring mechanism 7 includes a scale grating 71, a reading head 72, and a connecting rod 73. The scale grating 71 is fixedly connected to the mounting frame 51, and the reading head 72 is slidably connected to the scale grating 71. The reading head 72 is fixedly connected to one of the clamping plates 64 through the connecting rod 73. In this embodiment, the measured battery cell is charged under a constant pressure, and the outer dimensions of the battery cell change, which will cause the telescopic rod 61 to be displaced, thereby driving the reading head 72 to move, so that the scale grating 71 can detect the change in the outer dimensions of the battery during the charging process, and the deformation is read by the reading head 72, which is convenient for observing and collecting the deformation data.

[0045] When testing the battery cell, the battery cell is placed between the two clamping frames 9, and the first motor 22 drives the first bidirectional threaded rod 23 to rotate, and the first bidirectional threaded rod 23 drives the two first slides 24 to approach each other, thereby driving the two clamping frames 9 to approach each other, so that the two clamping frames 9 are respectively clamped on both sides of the battery cell, thereby completing the fixation of the battery cell; the electrode sheet 34 on the first turntable 31 is in contact with the conductive connector on the battery cell, and then the second motor 52 drives the second bidirectional threaded rod 53 to rotate, thereby driving the two moving plates 55 to approach each other through the two second slides 54, so that the deformation test mechanism 6 is in contact with the front and rear sides of the tested battery cell, and then the deformation test is started; first, under constant pressure, the charging element 33 passes The tested battery cell is charged through the electrode sheet 34, and the deformation data of the battery cell is observed and collected through the scale grating 71 and the reading head 72. Then, the tested battery cell is charged at a constant position through the charging element 33 and the electrode sheet 34, and the squeezing force exerted on the outside by the battery cell after the outer dimensions become larger during the charging process is detected by the pressure sensor 63; when the test is completed, the two movable plates 55 are driven away from the battery cell, and then the steering gear 42 is started, and the steering gear 42 drives the second turntable 41 to rotate, and the second turntable 41 drives the clamping frame 9 to rotate 90° and then stop, so that the battery cell is adjusted from a horizontal state to a vertical state, and then the pressure test assembly is moved to contact the upper and lower surfaces of the battery cell, and another deformation test is performed, so as to achieve more comprehensive deformation test data.

[0046] 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 aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery cell deformation testing device, characterized in that: It comprises a first moving mechanism (2), a charging mechanism (3), a rotating mechanism (4), a second moving mechanism (5), a deformation testing mechanism (6), and a measuring mechanism (7); The first moving mechanism (2) and the second moving mechanism (5) are arranged crosswise; the first moving mechanism (2) is provided with a charging mechanism (3) and a rotating mechanism (4) in a relative manner; the second moving mechanism (5) is provided with a deformation testing mechanism (6); and the deformation testing mechanism (6) is provided with a measuring mechanism (7).

2. A battery cell deformation testing device according to claim 1, characterized in that: It also comprises a workbench (1), a first moving mechanism (2) fixedly connected along the X-axis on the top wall of the workbench (1), and a second moving mechanism (5) fixedly connected along the Y-axis in the middle of the first moving mechanism (2) on the top wall of the workbench (1).

3. The battery cell deformation testing device according to claim 1, characterized in that: The first moving mechanism (2) comprises a vertical plate (21), a first motor (22), a first bidirectional threaded rod (23), and a first slide seat (24); two vertical plates (21) are provided, and a first bidirectional threaded rod (23) is rotatably connected between the two vertical plates (21); a first motor (22) is fixedly connected to one of the vertical plates (21); an output shaft end of the first motor (22) is fixedly connected to the first bidirectional threaded rod (23); two first slide seats (24) are threadedly connected to the first bidirectional threaded rod (23); the two first slide seats (24) can move towards each other on the first bidirectional threaded rod (23); and a charging mechanism (3) and a rotating mechanism (4) are respectively provided on the two first slide seats (24).

4. A battery cell deformation testing device according to claim 3, characterized in that: The first moving mechanism (2) also includes a mounting plate, wherein the mounting plates are provided with two first mounting plates (251) and a second mounting plate (252), the two mounting plates being fixedly connected to two first slide seats (24) respectively, the first mounting plate (251) being provided with a charging mechanism (3), and the second mounting plate (252) being provided with a rotating mechanism (4).

5. A battery cell deformation testing device according to claim 4, characterized in that: A circular hole is provided on the first mounting plate (251), and the charging mechanism (3) comprises a first rotating disk (31), a fixing plate (32), a charging element (33), and an electrode sheet (34); the first rotating disk (31) is rotatably connected to the circular hole on the first mounting plate (251), the first rotating disk (31) is fixedly connected to the fixing plate (32) via a connecting column (311), the charging element (33) is fixedly connected to the fixing plate (32), a plurality of electrode sheets (34) are fixedly connected to a side of the first rotating disk (31) away from the charging element (33), the charging element (33) and the electrode sheet (34) are electrically connected, and a clamping frame (9) is fixedly provided on the first rotating disk (31) at the periphery of the electrode sheet (34).

6. A battery cell deformation testing device according to claim 5, characterized in that: A circular hole is provided on the second mounting plate (252); the rotating mechanism (4) comprises a second turntable (41) and a steering gear (42); the second turntable (41) is rotatably connected to the circular hole on the second mounting plate (252); the steering gear (42) is fixedly connected to the second turntable (41) via a supporting plate (421); an output end of the steering gear (42) is fixedly connected to the second turntable (41); a clamping frame (9) is fixedly connected to a side of the second turntable (41) away from the steering gear (42); the clamping frames (9) on the first turntable (31) and the second turntable (41) are relatively flush.

7. The battery cell deformation testing device according to claim 1, characterized in that: The second moving mechanism (5) comprises a mounting frame (51), a second motor (52), a second bidirectional threaded rod (53), a second slide seat (54) and a moving plate (55); the second motor (52) is fixedly connected to the vertical plate of the mounting frame (51); the second bidirectional threaded rod (53) is rotatably connected to the mounting frame (51); the output shaft end of the second motor (52) is fixedly connected to the second bidirectional threaded rod (53); the second bidirectional threaded rod (53) is threadedly connected to two second slide seats (54); the second slide seats (54) are slidably connected to the mounting frame (51); a moving plate (55) is fixedly connected to each of the second slide seats (54); each of the moving plates (55) is provided with a deformation testing mechanism (6); a measuring mechanism (7) is provided between one of the deformation testing mechanisms (6) and the horizontal plate of the mounting frame (51).

8. A battery cell deformation testing device according to claim 7, characterized in that: The mounting frame (51) is arranged in an inverted U shape.

9. The battery cell deformation testing device according to claim 7, characterized in that: The deformation testing mechanism (6) comprises a telescopic rod (61), a spring (62), a pressure sensor (63), and a clamping plate (64); the movable plate (55) is fixedly connected to the pressure sensor (63) via the telescopic rod (61); the outer periphery of the telescopic rod (61) is sleeved with a spring (62); two ends of the spring (62) are respectively fixedly connected to the movable plate (55) and the pressure sensor (63); and the clamping plate (64) is fixedly connected to the pressure sensor (63).

10. A battery cell deformation testing device according to claim 9, characterized in that: The measuring mechanism (7) comprises a scale grating (71), a reading head (72), and a connecting rod (73); the scale grating (71) is fixedly connected to the mounting frame (51); the reading head (72) is slidably connected to the scale grating (71); and the reading head (72) is fixedly connected to one of the clamping plates (64) via the connecting rod (73).

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