Lithium battery cycle test auxiliary fixing device

Abstract

The invention belongs to the related technical field of lithium battery test assistance, and particularly relates to a lithium battery cycle test auxiliary fixing device which comprises a base, four first stand columns are fixedly connected to the upper end of the base, the upper ends of the four first stand columns are fixedly connected to the lower end of a mounting plate, and a double-shaft motor is fixedly mounted at the lower end of the mounting plate. Through the mutual cooperation of a double-shaft motor, a rotating shaft II, a bevel gear I, a bevel gear II, a rotating shaft I, a circular rotating disc, a supporting frame, a supporting rod and a push-pull bracket, two placing plates II can be driven to move relatively; and then the left end and the right end of the lithium battery can be clamped under the cooperation of battery clamping plates arranged on the two second placing plates, then two pressing plates are driven to move downwards under the cooperation of a driving assembly, a transmission sleeve, a third rotating shaft, a pushing cam and a rolling wheel, and pressing of the upper portion of the lithium battery is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lithium battery test auxiliary related technologies, and particularly relates to a lithium battery cycle test auxiliary fixing device. BACKGROUND

[0002] With the rapid development of new energy vehicles, energy storage systems and portable electronic devices, the performance and reliability test of lithium ion batteries as the core power source and energy storage unit is crucial. Cycle test is a key link for evaluating the service life, capacity attenuation and performance stability of lithium batteries. Usually, the battery needs to be repeatedly charged and discharged for a long time. During the cycle test, the lithium battery to be tested needs to be stably fixed on the test station to ensure that the electrode and the probe or clamp of the test equipment maintain continuous and good electrical contact. Therefore, an auxiliary fixing device is needed to fix the lithium battery.

[0003] Problems of the prior art:

[0004] 1. The common lithium battery fixing device in the prior art usually adopts a simple single-sided baffle, a bandage or a single-direction clamp. This fixing method is prone to cause the battery to loosen, have poor contact or even fall off when facing the continuous vibration or temperature change generated in long-term cycle test, which not only affects the accuracy of the test results, but also may cause safety hazards.

[0005] 2. The battery clamp of the prior art is designed for a specific model of battery and has a fixed size, and cannot be flexibly adapted to lithium batteries of different lengths, widths and heights. When testing different specifications of batteries, the clamp parts need to be replaced or adjusted a lot, which is tedious and time-consuming. In addition, the clamping operation depends on manual screw locking or simple latch, lacks unified power drive and linkage control, and leads to low clamping efficiency. SUMMARY

[0006] The purpose of the present application is to provide a lithium battery cycle test auxiliary fixing device, which can solve the problem that the common lithium battery fixing device in the prior art usually adopts a simple single-sided baffle, a bandage or a single-direction clamp. This fixing method is prone to cause the battery to loosen, have poor contact or even fall off when facing the continuous vibration or temperature change generated in long-term cycle test, which not only affects the accuracy of the test results, but also may cause safety hazards.

[0007] The technical solutions adopted by the present application are as follows:

[0008] The utility model provides a kind of lithium battery cycle test auxiliary fixing device, including base, the upper end of the base is fixedly connected with four columns one, the upper end of four The column one is fixedly connected in the lower end of mounting plate, double-shaft motor is fixedly installed in the lower end of mounting plate, the double-shaft motor is fixedly connected with the one end of two rotating shafts two respectively by being set on two output shafts, the other end of two The rotating shaft two is fixedly connected with bevel gear two, two The bevel gear two is engaged with two bevel gears one respectively, two The bevel gear one is fixedly connected with the lower end of two rotating shafts one respectively, two The rotating shaft one is movably connected with mounting plate;

[0009] The upper end of two The rotating shaft one is fixedly connected with circular turntable, two The circular turntable is movably connected with two auxiliary fixing assemblies respectively by being set on push rod, two The auxiliary fixing assembly is movably connected with drive assembly, and the drive assembly is arranged on the upper end of mounting plate, two The auxiliary fixing assembly is slidably connected with two support rods, the upper end of mounting plate is fixedly connected with four columns two, the upper end of four The column two is fixedly connected with placing plate one, and the rear side of the upper end of placing plate one is provided with limit baffle.

[0010] The left and right ends of two The support rod are fixedly connected with fixed plate one, and the lower end of four The fixed plate one is fixedly connected with mounting plate, fixed plate two is movably connected on two The rotating shaft two, and the upper end of two The fixed rod two is fixedly connected in the lower end of mounting plate, and the upper end of the base is provided with battery main body and control panel main body.

[0011] Two The auxiliary fixing assembly includes placing plate two, the upper end of two The placing plate two is flush with the upper end of placing plate one, the upper end of two The placing plate two is fixedly connected with battery clamping plate, the lower end of two The placing plate two is fixedly connected with support frame, and the lower end of two The support frame is fixedly connected with push-pull bracket.

[0012] Two The push-pull bracket is movably connected with two The circular turntable that the upper end of two is provided with push rod respectively by being set in the push-pull groove of lower end interior, two The support frame is slidably connected with two support rods by being set in two The through hole of its interior, and two The support frame is movably connected with transmission sleeve.

[0013] Two The transmission sleeve is movably connected with drive assembly by being set in two The guide slot of its interior, and the opposite distal end of two The transmission sleeve is fixedly connected with transmission wheel one, two The transmission wheel one is drivingly connected with two The transmission wheel two respectively by being set two The transmission belt, and two The transmission wheel two is fixedly connected with two rotating shaft three.

[0014] Each of the two rotating shafts three has a push cam fixedly connected to its relatively close end. Each of the two push cams has a roller at its front end that overlaps with the upper end of the two pressure plates. Each of the two pressure plates has two T-shaped guide rods fixedly connected to its upper end. Each of the four T-shaped guide rods is slidably connected to a fixed frame with a guide hole in its upper end. Each of the four fixed frames is divided into two groups, and their lower ends are fixedly connected to the upper ends of the two placement plates two.

[0015] Each of the four T-shaped guide rods is fitted with a spring. The upper ends of the four springs are fixedly connected to the upper side of the four T-shaped guide rods, and the lower ends of the four springs are fixedly connected to the upper ends of the four fixed brackets. Each of the two rotating shafts three is movably connected with a fixing plate five, and the lower ends of the two fixing plates five are fixedly connected to the upper ends of the two placement plates two.

[0016] The drive assembly includes a transmission rod, which is movably connected to two transmission sleeves, each with two guide blocks on its left and right sides, and each sleeve has two guide slots on its inner surface. The left and right ends of the transmission rod are movably connected to fixed plates four, and the lower ends of the two fixed plates four are fixedly connected to the upper end of the mounting plate.

[0017] A meshing gear is fixedly connected to the middle position of the transmission rod. The meshing gear meshes with a meshing toothed plate. The meshing toothed plate is fixedly connected to the upper end of the push-pull plate. The push-pull plate is slidably connected to two fixed rods through two circular through holes opened inside it.

[0018] The front and rear ends of the two fixed rods are respectively fixedly connected to the relatively close ends of the two fixed plates three. The lower ends of the two fixed plates three are fixedly connected to the mounting plate. An electric push rod body is fixedly installed at the rear end of the front fixed plate three. The rear end of the electric push rod body is fixedly connected to the push-pull plate.

[0019] The technical effects achieved by this invention are as follows:

[0020] 1. This invention, through the coordinated arrangement of a dual-axis motor, a second rotating shaft, a first bevel gear, a second bevel gear, a first rotating shaft, a circular turntable, a support frame, a support rod, and a push-pull bracket, enables the relative movement of two placement plates. The battery clamps on both placement plates then clamp the left and right ends of the lithium battery. Subsequently, the drive assembly, transmission sleeve, a third rotating shaft, a push cam, and rollers move the two pressure plates downwards, achieving pressure on the top of the lithium battery. This combined left-right and up-down clamping method provides stable constraint on the lithium battery from multiple directions, effectively preventing battery displacement or loosening due to vibration or impact during testing. This ensures the accuracy of test data and the safety of the operation, avoiding the poor battery fixation effect caused by the single clamping direction of existing lithium battery fixing devices.

[0021] 2. This invention achieves continuous adjustment of the distance between the two battery clamping plates through the cooperation of a dual-axis motor, bevel gear one, bevel gear two, and a central turntable, which can adapt to lithium batteries of different specifications and sizes. At the same time, the pressure plate set on the auxiliary fixing component is automatically pressed down and fixed through the cooperation of an electric push rod, meshing gear, meshing toothed plate, push cam, and pressure plate. The entire clamping process does not require frequent manual replacement of clamps or manual locking, realizing rapid positioning and one-click multi-point locking, greatly reducing the preparation time before testing, and improving the automation level and overall efficiency of cyclic testing. Attached Figure Description

[0022] Figure 1 This is a front-view stereoscopic structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure in right cross-section of the present invention;

[0024] Figure 3 This is a schematic diagram of the left-view stereoscopic structure in this invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the mounting plate in this invention, showing its main cross-sectional view.

[0026] Figure 5 This is a front-view stereoscopic structural diagram of the driving component in this invention;

[0027] Figure 6 This is a left-side stereoscopic view of the auxiliary fixing component in this invention;

[0028] Figure 7 This is a bottom-view three-dimensional structural diagram of the auxiliary fixing component in this invention.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Base; 2. Control panel body; 3. Battery body; 4. Column 1; 5. Drive assembly; 51. Fixing rod; 52. Electric push rod body; 53. Meshing gear plate; 54. Fixing plate 3; 55. Transmission rod; 56. Push-pull plate; 57. Meshing gear; 58. Fixing plate 4; 6. Mounting plate; 7. Auxiliary fixing assembly; 71. Push-pull bracket; 72. Transmission sleeve; 73. Transmission wheel 1; 74. Support frame; 75. Placement plate 2; 76. Fixing frame; 7 7. Battery clamp; 78. Fixing plate five; 79. Transmission wheel two; 710. Rotating shaft three; 711. Spring; 712. T-shaped guide rod; 713. Pushing cam; 714. Roller; 715. Pressure plate; 8. Support rod; 9. Circular turntable; 10. Fixing plate one; 11. Column two; 12. Placement plate one; 13. Limiting baffle; 14. Dual-axis motor; 15. Rotating shaft one; 16. Bevel gear one; 17. Bevel gear two; 18. Fixing plate two; 19. Rotating shaft two. Detailed Implementation

[0031] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0032] like Figures 1-7 As shown, a lithium battery cycle test auxiliary fixing device includes a base 1. Four columns 4 are fixedly connected to the upper end of the base 1. The upper ends of the four columns 4 are all fixedly connected to the lower end of the mounting plate 6. A dual-axis motor 14 is fixedly installed at the lower end of the mounting plate 6. The dual-axis motor 14 is fixedly connected to one end of two rotating shafts 19 through two output shafts. The other end of each of the two rotating shafts 19 is fixedly connected to a bevel gear 17. The two bevel gears 17 mesh with two bevel gears 16. The two bevel gears 16 are fixedly connected to the lower end of two rotating shafts 15. The two rotating shafts 15 are movably connected to the mounting plate 6. The rotation of the output shafts of the dual-axis motor 14 drives the two rotating shafts 19 to rotate. With the cooperation of the bevel gears 16 and 17, the two rotating shafts 15 can be driven to rotate, and the rotation directions of the two rotating shafts 15 are opposite.

[0033] Two rotating shafts 15 are each fixedly connected to a circular turntable 9 at their upper ends. Each of the two turntables 9 is movably connected to two auxiliary fixing components 7 via push rods. Each of the auxiliary fixing components 7 is movably connected to a drive component 5, which is located at the upper end of the mounting plate 6. Each of the two auxiliary fixing components 7 is slidably connected to two support rods 8. Four uprights 11 are fixedly connected to the upper end of the mounting plate 6. The upper ends of the four uprights 11 are fixedly connected to a placement plate 12. A limit baffle 13 is provided on the rear side of the upper end of the placement plate 12. The relative rotation of the two rotating shafts 15 causes the two circular turntables 9 to rotate accordingly. Then, with the cooperation of the support rods 8, the two auxiliary fixing components 7 can move closer together, thereby achieving a clamping and fixing effect on both ends of the lithium battery placed on the placement plate 12. Furthermore, the cooperation between the drive component 5 and the auxiliary fixing components 7 achieves a clamping and fixing effect on both the upper and lower ends of the lithium battery, thus achieving fixation of the lithium battery in multiple directions and ensuring the stability of the lithium battery during testing.

[0034] Furthermore, fixed plates 10 are fixedly connected to both ends of the two support rods 8, and the lower ends of the four fixed plates 10 are fixedly connected to the mounting plate 6. Fixed plates 28 are movably connected to both rotating shafts 2 19, and the upper ends of the two fixed rods 51 are fixedly connected to the lower ends of the mounting plate 6. The upper end of the base 1 is provided with the battery body 3 and the control panel body 2. The fixed plates 2 18 can provide support for the rotating shafts 2 19, and the fixed plates 10 can fix the support rods 8.

[0035] Furthermore, both auxiliary fixing components 7 include a second placement plate 75, the upper ends of which are flush with the upper ends of the first placement plate 12. A battery clamp 77 is fixedly connected to the upper ends of both second placement plates 75, and a support frame 74 is fixedly connected to the lower ends of both second placement plates 75. A push-pull bracket 71 is fixedly connected to the lower ends of both support frames 74. Each push-pull bracket 71 is movably connected to two circular turntables 9, each with a push rod at its upper end, via push-pull grooves inside its lower end. Each support frame 74 is slidably connected to two support rods 8 via two through holes inside its interior. The support rods 8 and their cooperation restrict the movement direction of the second placement plate 75. The rotation of disk 9, in conjunction with the two push-pull brackets 71, drives the two support frames 74 to move relative to each other, thereby bringing the two placement plates 75 closer together. This allows the distance between the two placement plates 75 to be adjusted according to the battery size. Furthermore, the battery clamps 77 on each of the two placement plates 75 effectively clamp and fix the lithium battery to its left and right ends. Each support frame 74 is movably connected to a transmission sleeve 72, which is movably connected to the drive assembly 5 via two guide grooves inside. The relatively distant ends of the two transmission sleeves 72 are fixedly connected to a transmission wheel 73, which is connected to the two transmission wheels via two transmission belts. The transmission connection is as follows: two transmission wheels 79 are fixedly connected to two rotating shafts 710. Each rotating shaft 710 has a push cam 713 fixedly connected to its relatively close end. Each push cam 713 connects to the upper end of two pressure plates 715 via rollers 714 at its front end. Each pressure plate 715 has two T-shaped guide rods 712 fixedly connected to its upper end. The four T-shaped guide rods 712 are slidably connected to four fixed brackets 76, each with a guide hole at its upper end. The four fixed brackets 76 are divided into two groups, their lower ends fixedly connected to the upper ends of two placement plates 75. Each T-shaped guide rod 712 is fitted with a spring 711, the upper ends of which are fixedly connected to the upper sides of the four T-shaped guide rods 712. The lower ends of four springs 711 are fixedly connected to the upper ends of four fixed brackets 76 respectively. Fixed plates 78 are movably connected to each of the two rotating shafts 710. The lower ends of the two fixed plates 78 are fixedly connected to the upper ends of the two placement plates 75 respectively. The driving assembly 5 drives the two transmission sleeves 72 to rotate, which, in turn, with the cooperation of the first transmission wheel 73 and the second transmission wheel 79, achieves the effect of driving the two transmission sleeves 72 to rotate. The rotation of the two transmission sleeves 72, in conjunction with the first transmission wheel 73 and the second transmission wheel 79, drives the two rotating shafts 710 to rotate. Then, with the cooperation of the push cam 713 and the roller 714, the two pressure plates 715 can be pushed downwards.Until the lower ends of both pressure plates 715 overlap the upper end of the lithium battery, the cooperation between the pressure plates 715 and the placement plate 75 achieves the clamping and fixing effect on both ends of the lithium battery. The T-shaped guide rod 712 and the fixing bracket 76 further restrict the movement direction of the pressure plates 715.

[0036] The drive assembly 5 includes a transmission rod 55. The transmission rod 55 is movably connected to two transmission sleeves 72, each with two guide grooves inside, via two guide blocks on its left and right sides. Fixed plates 58 are movably connected to both ends of the transmission rod 55. The lower ends of the two fixed plates 58 are fixedly connected to the upper ends of the mounting plate 6. A meshing gear 57 is fixedly connected to the middle of the transmission rod 55. The meshing gear 57 meshes with a meshing toothed plate 53, which is fixedly connected to the upper end of a push-pull plate 56. The push-pull plate 56 is slidably connected to two fixed rods 51 through two circular through holes inside it. The front and rear ends of the two fixed rods 51 are fixed to the relatively close ends of the two fixed plates 54, respectively. The lower ends of the two fixed plates 54 are fixedly connected to the mounting plate 6. The rear end of the front fixed plate 54 is fixedly installed with an electric push rod body 52. ​​The rear end of the electric push rod body 52 is fixedly connected to the push-pull plate 56. The mutual cooperation between the fixed plates 54 and the fixed rod 51 can limit the movement direction of the push-pull plate 56. The electric push rod body 52 drives the push-pull plate 56 to move backward. Then, with the cooperation of the meshing tooth plate 53 and the meshing gear 57, the transmission rod 55 can be driven to rotate. The rotation of the transmission rod 55, with the cooperation of the four guide blocks set on it, can drive the two transmission sleeves 72 to rotate.

[0037] The working principle of this invention is as follows:

[0038] When using this device to fix the lithium battery, first place the lithium battery on the upper end of the placement plate 12, and make the rear end of the lithium battery close to the front end of the limiting baffle 13. Then start the dual-axis motor 14 to drive the two rotating shafts 19 to rotate. With the cooperation of the set bevel gear 16, bevel gear 17 and rotating shaft 15, the two circular turntables 9 can be driven to rotate relative to each other. During the relative rotation of the two circular turntables 9, with the cooperation of the set push-pull bracket 71, support rod 8, fixing plate 10 and support frame 74, the two placement plates 75 can be moved relative to each other, thereby realizing the adjustment of the distance between the two battery clamping plates 77 until the relatively close ends of the two battery clamping plates 77 respectively overlap with the left and right ends of the lithium battery. At this time, the clamping and fixing effect of the left and right ends of the lithium battery can be achieved.

[0039] After the left and right ends of the lithium battery are clamped and fixed, the electric push rod body 52 is activated to drive the push-pull plate 56 to move backward. Then, with the cooperation of the meshing tooth plate 53 and the meshing gear 57, the transmission rod 55 can be driven to rotate. The rotation of the transmission rod 55, under the action of the four guide blocks on it, can drive the two transmission sleeves 72 to rotate synchronously. The synchronous rotation of the two transmission sleeves 72, with the cooperation of the transmission wheel 1 73 and the transmission wheel 2 79, can drive the two rotating shafts 3 710 to rotate. The rotation of the two rotating shafts 3 710, with the cooperation of the push cam 713, the roller 714, the T-shaped guide rod 712 and the fixing rod 51, can drive the two pressure plates 715 to move downward until the two pressure plates 715 are both on the upper end of the lithium battery. At this time, with the cooperation of the pressure plates 715 and the placement plate, the lithium battery can be further fixed, ensuring the stability of the lithium battery during the testing process.

[0040] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A lithium battery cycle testing auxiliary fixing device, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly connected to four columns (4), and the upper ends of the four columns (4) are fixedly connected to the lower end of the mounting plate (6). The lower end of the mounting plate (6) is fixedly installed with a dual-axis motor (14). The dual-axis motor (14) is fixedly connected to one end of two rotating shafts (19) through two output shafts set on it. The other end of the two rotating shafts (19) is fixedly connected to bevel gears (17). The two bevel gears (17) mesh with two bevel gears (16). The two bevel gears (16) are fixedly connected to the lower end of two rotating shafts (15). The two rotating shafts (15) are movably connected to the mounting plate (6). The upper ends of the two rotating shafts (15) are fixedly connected to a circular turntable (9). The two circular turntables (9) are movably connected to two auxiliary fixing components (7) respectively through push rods provided on them. The two auxiliary fixing components (7) are movably connected to a drive component (5). The drive component (5) is set on the upper end of the mounting plate (6). The two auxiliary fixing components (7) are slidably connected to two support rods (8). The upper end of the mounting plate (6) is fixedly connected to four columns (11). The upper ends of the four columns (11) are fixedly connected to a placement plate (12). A limit baffle (13) is provided on the rear side of the upper end of the placement plate (12).

2. The lithium battery cycle testing auxiliary fixing device according to claim 1, characterized in that: The two support rods (8) are fixedly connected to the left and right ends of the fixing plate 1 (10), the lower ends of the four fixing plates 1 (10) are fixedly connected to the mounting plate (6), the two rotating shafts 2 (19) are movably connected to the fixing plate 2 (18), the upper ends of the two fixing rods (51) 2 are fixedly connected to the lower end of the mounting plate (6), and the upper end of the base (1) is provided with the battery body (3) and the control panel body (2).

3. The lithium battery cycle testing auxiliary fixing device according to claim 1, characterized in that: Both of the auxiliary fixing components (7) include a second placement plate (75). The upper ends of the two second placement plates (75) are flush with the upper end of the first placement plate (12). The upper ends of the two second placement plates (75) are fixedly connected to a battery clamp (77). The lower ends of the two second placement plates (75) are fixedly connected to a support frame (74). The lower ends of the two support frames (74) are fixedly connected to a push-pull bracket (71).

4. The lithium battery cycle testing auxiliary fixing device according to claim 3, characterized in that: Both of the push-pull brackets (71) are movably connected to two circular turntables (9) with push rods at their upper ends through push-pull grooves at their lower ends. Both of the support frames (74) are slidably connected to two support rods (8) through two through holes at their interiors. Both of the support frames (74) are movably connected to transmission sleeves (72).

5. The lithium battery cycle testing auxiliary fixing device according to claim 4, characterized in that: Both of the transmission sleeves (72) are movably connected to the drive assembly (5) through two guide grooves opened inside them. The two transmission sleeves (72) are fixedly connected to the relatively far ends of each other with a transmission wheel (73). The two transmission wheels (73) are connected to the two transmission wheels (79) respectively through two transmission belts. The two transmission wheels (79) are fixedly connected to the two rotating shafts (710) respectively.

6. The lithium battery cycle testing auxiliary fixing device according to claim 5, characterized in that: The two rotating shafts (710) are fixedly connected to each other at their relatively close ends by push cams (713). The two push cams (713) are connected to the upper ends of the two pressure plates (715) respectively by rollers (714) set at their front ends. The upper ends of the two pressure plates (715) are fixedly connected to two T-shaped guide rods (712). The four T-shaped guide rods (712) are slidably connected to four fixed frames (76) with guide holes in their upper ends. The four fixed frames (76) are divided into two groups, and their lower ends are fixedly connected to the upper ends of the two placement plates (75).

7. The lithium battery cycle testing auxiliary fixing device according to claim 6, characterized in that: Each of the four T-shaped guide rods (712) is fitted with a spring (711). The upper ends of the four springs (711) are fixedly connected to the upper side of the four T-shaped guide rods (712), and the lower ends of the four springs (711) are fixedly connected to the upper ends of the four fixed brackets (76). Each of the two rotating shafts (710) is movably connected with a fixing plate (78), and the lower ends of the two fixing plates (78) are fixedly connected to the upper ends of the two placement plates (75).

8. The lithium battery cycle testing auxiliary fixing device according to claim 5, characterized in that: The drive assembly (5) includes a transmission rod (55), which is movably connected to two transmission sleeves (72) with two guide blocks on its left and right sides, and each sleeve has two guide grooves. The left and right ends of the transmission rod (55) are movably connected to four fixing plates (58), and the lower ends of the two fixing plates (58) are fixedly connected to the upper end of the mounting plate (6).

9. The lithium battery cycle testing auxiliary fixing device according to claim 8, characterized in that: A meshing gear (57) is fixedly connected at the middle position of the transmission rod (55). The meshing gear (57) meshes with the meshing tooth plate (53). The meshing tooth plate (53) is fixedly connected to the upper end of the push-pull plate (56). The push-pull plate (56) is slidably connected to two fixed rods (51) through two circular through holes opened inside it.

10. The lithium battery cycle testing auxiliary fixing device according to claim 9, characterized in that: The front and rear ends of the two fixed rods (51) are respectively fixedly connected to the relatively close ends of the two fixed plates (54). The lower ends of the two fixed plates (54) are fixedly connected to the mounting plate (6). The rear end of the front fixed plate (54) is fixedly installed with an electric push rod body (52). The rear end of the electric push rod body (52) is fixedly connected to the push-pull plate (56).

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